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linux_old1/drivers/char/moxa.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*****************************************************************************/
/*
* moxa.c -- MOXA Intellio family multiport serial driver.
*
* Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
*
* This code is loosely based on the Linux serial driver, written by
* Linus Torvalds, Theodore T'so and others.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* MOXA Intellio Series Driver
* for : LINUX
* date : 1999/1/7
* version : 5.1
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/serial.h>
#include <linux/tty_driver.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#define MOXA_VERSION "5.1k"
#define MOXAMAJOR 172
#define MOXACUMAJOR 173
#define put_to_user(arg1, arg2) put_user(arg1, (unsigned long *)arg2)
#define get_from_user(arg1, arg2) get_user(arg1, (unsigned int *)arg2)
#define MAX_BOARDS 4 /* Don't change this value */
#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
#define MAX_PORTS 128 /* Don't change this value */
/*
* Define the Moxa PCI vendor and device IDs.
*/
#define MOXA_BUS_TYPE_ISA 0
#define MOXA_BUS_TYPE_PCI 1
#ifndef PCI_VENDOR_ID_MOXA
#define PCI_VENDOR_ID_MOXA 0x1393
#endif
#ifndef PCI_DEVICE_ID_CP204J
#define PCI_DEVICE_ID_CP204J 0x2040
#endif
#ifndef PCI_DEVICE_ID_C218
#define PCI_DEVICE_ID_C218 0x2180
#endif
#ifndef PCI_DEVICE_ID_C320
#define PCI_DEVICE_ID_C320 0x3200
#endif
enum {
MOXA_BOARD_C218_PCI = 1,
MOXA_BOARD_C218_ISA,
MOXA_BOARD_C320_PCI,
MOXA_BOARD_C320_ISA,
MOXA_BOARD_CP204J,
};
static char *moxa_brdname[] =
{
"C218 Turbo PCI series",
"C218 Turbo ISA series",
"C320 Turbo PCI series",
"C320 Turbo ISA series",
"CP-204J series",
};
#ifdef CONFIG_PCI
static struct pci_device_id moxa_pcibrds[] = {
{ PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_C218, PCI_ANY_ID, PCI_ANY_ID,
0, 0, MOXA_BOARD_C218_PCI },
{ PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_C320, PCI_ANY_ID, PCI_ANY_ID,
0, 0, MOXA_BOARD_C320_PCI },
{ PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_CP204J, PCI_ANY_ID, PCI_ANY_ID,
0, 0, MOXA_BOARD_CP204J },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
#endif /* CONFIG_PCI */
typedef struct _moxa_isa_board_conf {
int boardType;
int numPorts;
unsigned long baseAddr;
} moxa_isa_board_conf;
static moxa_isa_board_conf moxa_isa_boards[] =
{
/* {MOXA_BOARD_C218_ISA,8,0xDC000}, */
};
typedef struct _moxa_pci_devinfo {
ushort busNum;
ushort devNum;
} moxa_pci_devinfo;
typedef struct _moxa_board_conf {
int boardType;
int numPorts;
unsigned long baseAddr;
int busType;
moxa_pci_devinfo pciInfo;
} moxa_board_conf;
static moxa_board_conf moxa_boards[MAX_BOARDS];
static void __iomem *moxaBaseAddr[MAX_BOARDS];
struct moxa_str {
int type;
int port;
int close_delay;
unsigned short closing_wait;
int count;
int blocked_open;
long event; /* long req'd for set_bit --RR */
int asyncflags;
unsigned long statusflags;
struct tty_struct *tty;
int cflag;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
struct work_struct tqueue;
};
struct mxser_mstatus {
tcflag_t cflag;
int cts;
int dsr;
int ri;
int dcd;
};
static struct mxser_mstatus GMStatus[MAX_PORTS];
/* statusflags */
#define TXSTOPPED 0x1
#define LOWWAIT 0x2
#define EMPTYWAIT 0x4
#define THROTTLE 0x8
/* event */
#define MOXA_EVENT_HANGUP 1
#define SERIAL_DO_RESTART
#define SERIAL_TYPE_NORMAL 1
#define WAKEUP_CHARS 256
#define PORTNO(x) ((x)->index)
static int verbose = 0;
static int ttymajor = MOXAMAJOR;
/* Variables for insmod */
#ifdef MODULE
static int baseaddr[] = {0, 0, 0, 0};
static int type[] = {0, 0, 0, 0};
static int numports[] = {0, 0, 0, 0};
#endif
MODULE_AUTHOR("William Chen");
MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
MODULE_LICENSE("GPL");
#ifdef MODULE
module_param_array(type, int, NULL, 0);
module_param_array(baseaddr, int, NULL, 0);
module_param_array(numports, int, NULL, 0);
#endif
module_param(ttymajor, int, 0);
module_param(verbose, bool, 0644);
static struct tty_driver *moxaDriver;
static struct moxa_str moxaChannels[MAX_PORTS];
static unsigned char *moxaXmitBuff;
static int moxaTimer_on;
static struct timer_list moxaTimer;
static int moxaEmptyTimer_on[MAX_PORTS];
static struct timer_list moxaEmptyTimer[MAX_PORTS];
static struct semaphore moxaBuffSem;
/*
* static functions:
*/
static void do_moxa_softint(void *);
static int moxa_open(struct tty_struct *, struct file *);
static void moxa_close(struct tty_struct *, struct file *);
static int moxa_write(struct tty_struct *, const unsigned char *, int);
static int moxa_write_room(struct tty_struct *);
static void moxa_flush_buffer(struct tty_struct *);
static int moxa_chars_in_buffer(struct tty_struct *);
static void moxa_flush_chars(struct tty_struct *);
static void moxa_put_char(struct tty_struct *, unsigned char);
static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long);
static void moxa_throttle(struct tty_struct *);
static void moxa_unthrottle(struct tty_struct *);
static void moxa_set_termios(struct tty_struct *, struct termios *);
static void moxa_stop(struct tty_struct *);
static void moxa_start(struct tty_struct *);
static void moxa_hangup(struct tty_struct *);
static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
static void moxa_poll(unsigned long);
static void set_tty_param(struct tty_struct *);
static int block_till_ready(struct tty_struct *, struct file *,
struct moxa_str *);
static void setup_empty_event(struct tty_struct *);
static void check_xmit_empty(unsigned long);
static void shut_down(struct moxa_str *);
static void receive_data(struct moxa_str *);
/*
* moxa board interface functions:
*/
static void MoxaDriverInit(void);
static int MoxaDriverIoctl(unsigned int, unsigned long, int);
static int MoxaDriverPoll(void);
static int MoxaPortsOfCard(int);
static int MoxaPortIsValid(int);
static void MoxaPortEnable(int);
static void MoxaPortDisable(int);
static long MoxaPortGetMaxBaud(int);
static long MoxaPortSetBaud(int, long);
static int MoxaPortSetTermio(int, struct termios *);
static int MoxaPortGetLineOut(int, int *, int *);
static void MoxaPortLineCtrl(int, int, int);
static void MoxaPortFlowCtrl(int, int, int, int, int, int);
static int MoxaPortLineStatus(int);
static int MoxaPortDCDChange(int);
static int MoxaPortDCDON(int);
static void MoxaPortFlushData(int, int);
static int MoxaPortWriteData(int, unsigned char *, int);
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
static int MoxaPortReadData(int, struct tty_struct *tty);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
static int MoxaPortTxQueue(int);
static int MoxaPortRxQueue(int);
static int MoxaPortTxFree(int);
static void MoxaPortTxDisable(int);
static void MoxaPortTxEnable(int);
static int MoxaPortResetBrkCnt(int);
static void MoxaPortSendBreak(int, int);
static int moxa_get_serial_info(struct moxa_str *, struct serial_struct __user *);
static int moxa_set_serial_info(struct moxa_str *, struct serial_struct __user *);
static void MoxaSetFifo(int port, int enable);
static struct tty_operations moxa_ops = {
.open = moxa_open,
.close = moxa_close,
.write = moxa_write,
.write_room = moxa_write_room,
.flush_buffer = moxa_flush_buffer,
.chars_in_buffer = moxa_chars_in_buffer,
.flush_chars = moxa_flush_chars,
.put_char = moxa_put_char,
.ioctl = moxa_ioctl,
.throttle = moxa_throttle,
.unthrottle = moxa_unthrottle,
.set_termios = moxa_set_termios,
.stop = moxa_stop,
.start = moxa_start,
.hangup = moxa_hangup,
.tiocmget = moxa_tiocmget,
.tiocmset = moxa_tiocmset,
};
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
static spinlock_t moxa_lock = SPIN_LOCK_UNLOCKED;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef CONFIG_PCI
static int moxa_get_PCI_conf(struct pci_dev *p, int board_type, moxa_board_conf * board)
{
board->baseAddr = pci_resource_start (p, 2);
board->boardType = board_type;
switch (board_type) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
board->numPorts = 8;
break;
case MOXA_BOARD_CP204J:
board->numPorts = 4;
break;
default:
board->numPorts = 0;
break;
}
board->busType = MOXA_BUS_TYPE_PCI;
board->pciInfo.busNum = p->bus->number;
board->pciInfo.devNum = p->devfn >> 3;
return (0);
}
#endif /* CONFIG_PCI */
static int __init moxa_init(void)
{
int i, numBoards;
struct moxa_str *ch;
printk(KERN_INFO "MOXA Intellio family driver version %s\n", MOXA_VERSION);
moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
if (!moxaDriver)
return -ENOMEM;
init_MUTEX(&moxaBuffSem);
moxaDriver->owner = THIS_MODULE;
[SERIAL] Fix moxa tty driver name The moxa driver was named "ttya", which is wrong: 1) Documentation/devices.txt says that the name should be "ttyMX". 2) First 10 ports (ttya0...ttya9) clash with the legacy pty driver. This patch changes the driver name to "ttyMX". http://bugme.osdl.org/show_bug.cgi?id=5012 Signed-off-by: Sergey Vlasov <vsu@altlinux.ru> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2005-09-03 23:26:49 +08:00
moxaDriver->name = "ttyMX";
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
moxaDriver->devfs_name = "tts/a";
moxaDriver->major = ttymajor;
moxaDriver->minor_start = 0;
moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
moxaDriver->subtype = SERIAL_TYPE_NORMAL;
moxaDriver->init_termios = tty_std_termios;
moxaDriver->init_termios.c_iflag = 0;
moxaDriver->init_termios.c_oflag = 0;
moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
moxaDriver->init_termios.c_lflag = 0;
moxaDriver->flags = TTY_DRIVER_REAL_RAW;
tty_set_operations(moxaDriver, &moxa_ops);
moxaXmitBuff = NULL;
for (i = 0, ch = moxaChannels; i < MAX_PORTS; i++, ch++) {
ch->type = PORT_16550A;
ch->port = i;
INIT_WORK(&ch->tqueue, do_moxa_softint, ch);
ch->tty = NULL;
ch->close_delay = 5 * HZ / 10;
ch->closing_wait = 30 * HZ;
ch->count = 0;
ch->blocked_open = 0;
ch->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
init_waitqueue_head(&ch->open_wait);
init_waitqueue_head(&ch->close_wait);
}
for (i = 0; i < MAX_BOARDS; i++) {
moxa_boards[i].boardType = 0;
moxa_boards[i].numPorts = 0;
moxa_boards[i].baseAddr = 0;
moxa_boards[i].busType = 0;
moxa_boards[i].pciInfo.busNum = 0;
moxa_boards[i].pciInfo.devNum = 0;
}
MoxaDriverInit();
printk("Tty devices major number = %d\n", ttymajor);
if (tty_register_driver(moxaDriver)) {
printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
put_tty_driver(moxaDriver);
return -1;
}
for (i = 0; i < MAX_PORTS; i++) {
init_timer(&moxaEmptyTimer[i]);
moxaEmptyTimer[i].function = check_xmit_empty;
moxaEmptyTimer[i].data = (unsigned long) & moxaChannels[i];
moxaEmptyTimer_on[i] = 0;
}
init_timer(&moxaTimer);
moxaTimer.function = moxa_poll;
moxaTimer.expires = jiffies + (HZ / 50);
moxaTimer_on = 1;
add_timer(&moxaTimer);
/* Find the boards defined in source code */
numBoards = 0;
for (i = 0; i < MAX_BOARDS; i++) {
if ((moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA) ||
(moxa_isa_boards[i].boardType == MOXA_BOARD_C320_ISA)) {
moxa_boards[numBoards].boardType = moxa_isa_boards[i].boardType;
if (moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA)
moxa_boards[numBoards].numPorts = 8;
else
moxa_boards[numBoards].numPorts = moxa_isa_boards[i].numPorts;
moxa_boards[numBoards].busType = MOXA_BUS_TYPE_ISA;
moxa_boards[numBoards].baseAddr = moxa_isa_boards[i].baseAddr;
if (verbose)
printk("Board %2d: %s board(baseAddr=%lx)\n",
numBoards + 1,
moxa_brdname[moxa_boards[numBoards].boardType - 1],
moxa_boards[numBoards].baseAddr);
numBoards++;
}
}
/* Find the boards defined form module args. */
#ifdef MODULE
for (i = 0; i < MAX_BOARDS; i++) {
if ((type[i] == MOXA_BOARD_C218_ISA) ||
(type[i] == MOXA_BOARD_C320_ISA)) {
if (verbose)
printk("Board %2d: %s board(baseAddr=%lx)\n",
numBoards + 1,
moxa_brdname[type[i] - 1],
(unsigned long) baseaddr[i]);
if (numBoards >= MAX_BOARDS) {
if (verbose)
printk("More than %d MOXA Intellio family boards found. Board is ignored.", MAX_BOARDS);
continue;
}
moxa_boards[numBoards].boardType = type[i];
if (moxa_isa_boards[i].boardType == MOXA_BOARD_C218_ISA)
moxa_boards[numBoards].numPorts = 8;
else
moxa_boards[numBoards].numPorts = numports[i];
moxa_boards[numBoards].busType = MOXA_BUS_TYPE_ISA;
moxa_boards[numBoards].baseAddr = baseaddr[i];
numBoards++;
}
}
#endif
/* Find PCI boards here */
#ifdef CONFIG_PCI
{
struct pci_dev *p = NULL;
[PATCH] drivers/char: Use ARRAY_SIZE macro Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) and remove duplicates of ARRAY_SIZE. Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:02 +08:00
int n = ARRAY_SIZE(moxa_pcibrds) - 1;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
i = 0;
while (i < n) {
[PATCH] pci: remove deprecates Replace pci_find_device() with more safer pci_get_device(). Signed-off-by: Amit Gud <gud@eth.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-12 21:33:33 +08:00
while ((p = pci_get_device(moxa_pcibrds[i].vendor, moxa_pcibrds[i].device, p))!=NULL)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
if (pci_enable_device(p))
continue;
if (numBoards >= MAX_BOARDS) {
if (verbose)
printk("More than %d MOXA Intellio family boards found. Board is ignored.", MAX_BOARDS);
} else {
moxa_get_PCI_conf(p, moxa_pcibrds[i].driver_data,
&moxa_boards[numBoards]);
numBoards++;
}
}
i++;
}
}
#endif
for (i = 0; i < numBoards; i++) {
moxaBaseAddr[i] = ioremap((unsigned long) moxa_boards[i].baseAddr, 0x4000);
}
return (0);
}
static void __exit moxa_exit(void)
{
int i;
if (verbose)
printk("Unloading module moxa ...\n");
if (moxaTimer_on)
del_timer(&moxaTimer);
for (i = 0; i < MAX_PORTS; i++)
if (moxaEmptyTimer_on[i])
del_timer(&moxaEmptyTimer[i]);
if (tty_unregister_driver(moxaDriver))
printk("Couldn't unregister MOXA Intellio family serial driver\n");
put_tty_driver(moxaDriver);
if (verbose)
printk("Done\n");
}
module_init(moxa_init);
module_exit(moxa_exit);
static void do_moxa_softint(void *private_)
{
struct moxa_str *ch = (struct moxa_str *) private_;
struct tty_struct *tty;
if (ch && (tty = ch->tty)) {
if (test_and_clear_bit(MOXA_EVENT_HANGUP, &ch->event)) {
tty_hangup(tty); /* FIXME: module removal race here - AKPM */
wake_up_interruptible(&ch->open_wait);
ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
}
}
}
static int moxa_open(struct tty_struct *tty, struct file *filp)
{
struct moxa_str *ch;
int port;
int retval;
unsigned long page;
port = PORTNO(tty);
if (port == MAX_PORTS) {
return (0);
}
if (!MoxaPortIsValid(port)) {
tty->driver_data = NULL;
return (-ENODEV);
}
down(&moxaBuffSem);
if (!moxaXmitBuff) {
page = get_zeroed_page(GFP_KERNEL);
if (!page) {
up(&moxaBuffSem);
return (-ENOMEM);
}
/* This test is guarded by the BuffSem so no longer needed
delete me in 2.5 */
if (moxaXmitBuff)
free_page(page);
else
moxaXmitBuff = (unsigned char *) page;
}
up(&moxaBuffSem);
ch = &moxaChannels[port];
ch->count++;
tty->driver_data = ch;
ch->tty = tty;
if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
ch->statusflags = 0;
set_tty_param(tty);
MoxaPortLineCtrl(ch->port, 1, 1);
MoxaPortEnable(ch->port);
ch->asyncflags |= ASYNC_INITIALIZED;
}
retval = block_till_ready(tty, filp, ch);
moxa_unthrottle(tty);
if (ch->type == PORT_16550A) {
MoxaSetFifo(ch->port, 1);
} else {
MoxaSetFifo(ch->port, 0);
}
return (retval);
}
static void moxa_close(struct tty_struct *tty, struct file *filp)
{
struct moxa_str *ch;
int port;
port = PORTNO(tty);
if (port == MAX_PORTS) {
return;
}
if (!MoxaPortIsValid(port)) {
#ifdef SERIAL_DEBUG_CLOSE
printk("Invalid portno in moxa_close\n");
#endif
tty->driver_data = NULL;
return;
}
if (tty->driver_data == NULL) {
return;
}
if (tty_hung_up_p(filp)) {
return;
}
ch = (struct moxa_str *) tty->driver_data;
if ((tty->count == 1) && (ch->count != 1)) {
printk("moxa_close: bad serial port count; tty->count is 1, "
"ch->count is %d\n", ch->count);
ch->count = 1;
}
if (--ch->count < 0) {
printk("moxa_close: bad serial port count, device=%s\n",
tty->name);
ch->count = 0;
}
if (ch->count) {
return;
}
ch->asyncflags |= ASYNC_CLOSING;
ch->cflag = tty->termios->c_cflag;
if (ch->asyncflags & ASYNC_INITIALIZED) {
setup_empty_event(tty);
tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
moxaEmptyTimer_on[ch->port] = 0;
del_timer(&moxaEmptyTimer[ch->port]);
}
shut_down(ch);
MoxaPortFlushData(port, 2);
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
ch->event = 0;
ch->tty = NULL;
if (ch->blocked_open) {
if (ch->close_delay) {
msleep_interruptible(jiffies_to_msecs(ch->close_delay));
}
wake_up_interruptible(&ch->open_wait);
}
ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
wake_up_interruptible(&ch->close_wait);
}
static int moxa_write(struct tty_struct *tty,
const unsigned char *buf, int count)
{
struct moxa_str *ch;
int len, port;
unsigned long flags;
ch = (struct moxa_str *) tty->driver_data;
if (ch == NULL)
return (0);
port = ch->port;
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_lock_irqsave(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
len = MoxaPortWriteData(port, (unsigned char *) buf, count);
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_unlock_irqrestore(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*********************************************
if ( !(ch->statusflags & LOWWAIT) &&
((len != count) || (MoxaPortTxFree(port) <= 100)) )
************************************************/
ch->statusflags |= LOWWAIT;
return (len);
}
static int moxa_write_room(struct tty_struct *tty)
{
struct moxa_str *ch;
if (tty->stopped)
return (0);
ch = (struct moxa_str *) tty->driver_data;
if (ch == NULL)
return (0);
return (MoxaPortTxFree(ch->port));
}
static void moxa_flush_buffer(struct tty_struct *tty)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
if (ch == NULL)
return;
MoxaPortFlushData(ch->port, 1);
tty_wakeup(tty);
}
static int moxa_chars_in_buffer(struct tty_struct *tty)
{
int chars;
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
/*
* Sigh...I have to check if driver_data is NULL here, because
* if an open() fails, the TTY subsystem eventually calls
* tty_wait_until_sent(), which calls the driver's chars_in_buffer()
* routine. And since the open() failed, we return 0 here. TDJ
*/
if (ch == NULL)
return (0);
chars = MoxaPortTxQueue(ch->port);
if (chars) {
/*
* Make it possible to wakeup anything waiting for output
* in tty_ioctl.c, etc.
*/
if (!(ch->statusflags & EMPTYWAIT))
setup_empty_event(tty);
}
return (chars);
}
static void moxa_flush_chars(struct tty_struct *tty)
{
/*
* Don't think I need this, because this is called to empty the TX
* buffer for the 16450, 16550, etc.
*/
}
static void moxa_put_char(struct tty_struct *tty, unsigned char c)
{
struct moxa_str *ch;
int port;
unsigned long flags;
ch = (struct moxa_str *) tty->driver_data;
if (ch == NULL)
return;
port = ch->port;
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_lock_irqsave(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
moxaXmitBuff[0] = c;
MoxaPortWriteData(port, moxaXmitBuff, 1);
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_unlock_irqrestore(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/************************************************
if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
*************************************************/
ch->statusflags |= LOWWAIT;
}
static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
int port;
int flag = 0, dtr, rts;
port = PORTNO(tty);
if ((port != MAX_PORTS) && (!ch))
return (-EINVAL);
MoxaPortGetLineOut(ch->port, &dtr, &rts);
if (dtr)
flag |= TIOCM_DTR;
if (rts)
flag |= TIOCM_RTS;
dtr = MoxaPortLineStatus(ch->port);
if (dtr & 1)
flag |= TIOCM_CTS;
if (dtr & 2)
flag |= TIOCM_DSR;
if (dtr & 4)
flag |= TIOCM_CD;
return flag;
}
static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
int port;
int dtr, rts;
port = PORTNO(tty);
if ((port != MAX_PORTS) && (!ch))
return (-EINVAL);
MoxaPortGetLineOut(ch->port, &dtr, &rts);
if (set & TIOCM_RTS)
rts = 1;
if (set & TIOCM_DTR)
dtr = 1;
if (clear & TIOCM_RTS)
rts = 0;
if (clear & TIOCM_DTR)
dtr = 0;
MoxaPortLineCtrl(ch->port, dtr, rts);
return 0;
}
static int moxa_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
register int port;
void __user *argp = (void __user *)arg;
int retval;
port = PORTNO(tty);
if ((port != MAX_PORTS) && (!ch))
return (-EINVAL);
switch (cmd) {
case TCSBRK: /* SVID version: non-zero arg --> no break */
retval = tty_check_change(tty);
if (retval)
return (retval);
setup_empty_event(tty);
tty_wait_until_sent(tty, 0);
if (!arg)
MoxaPortSendBreak(ch->port, 0);
return (0);
case TCSBRKP: /* support for POSIX tcsendbreak() */
retval = tty_check_change(tty);
if (retval)
return (retval);
setup_empty_event(tty);
tty_wait_until_sent(tty, 0);
MoxaPortSendBreak(ch->port, arg);
return (0);
case TIOCGSOFTCAR:
return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
case TIOCSSOFTCAR:
if(get_user(retval, (unsigned long __user *) argp))
return -EFAULT;
arg = retval;
tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) |
(arg ? CLOCAL : 0));
if (C_CLOCAL(tty))
ch->asyncflags &= ~ASYNC_CHECK_CD;
else
ch->asyncflags |= ASYNC_CHECK_CD;
return (0);
case TIOCGSERIAL:
return moxa_get_serial_info(ch, argp);
case TIOCSSERIAL:
return moxa_set_serial_info(ch, argp);
default:
retval = MoxaDriverIoctl(cmd, arg, port);
}
return (retval);
}
static void moxa_throttle(struct tty_struct *tty)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
ch->statusflags |= THROTTLE;
}
static void moxa_unthrottle(struct tty_struct *tty)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
ch->statusflags &= ~THROTTLE;
}
static void moxa_set_termios(struct tty_struct *tty,
struct termios *old_termios)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
if (ch == NULL)
return;
set_tty_param(tty);
if (!(old_termios->c_cflag & CLOCAL) &&
(tty->termios->c_cflag & CLOCAL))
wake_up_interruptible(&ch->open_wait);
}
static void moxa_stop(struct tty_struct *tty)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
if (ch == NULL)
return;
MoxaPortTxDisable(ch->port);
ch->statusflags |= TXSTOPPED;
}
static void moxa_start(struct tty_struct *tty)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
if (ch == NULL)
return;
if (!(ch->statusflags & TXSTOPPED))
return;
MoxaPortTxEnable(ch->port);
ch->statusflags &= ~TXSTOPPED;
}
static void moxa_hangup(struct tty_struct *tty)
{
struct moxa_str *ch = (struct moxa_str *) tty->driver_data;
moxa_flush_buffer(tty);
shut_down(ch);
ch->event = 0;
ch->count = 0;
ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
ch->tty = NULL;
wake_up_interruptible(&ch->open_wait);
}
static void moxa_poll(unsigned long ignored)
{
register int card;
struct moxa_str *ch;
struct tty_struct *tp;
int i, ports;
moxaTimer_on = 0;
del_timer(&moxaTimer);
if (MoxaDriverPoll() < 0) {
moxaTimer.function = moxa_poll;
moxaTimer.expires = jiffies + (HZ / 50);
moxaTimer_on = 1;
add_timer(&moxaTimer);
return;
}
for (card = 0; card < MAX_BOARDS; card++) {
if ((ports = MoxaPortsOfCard(card)) <= 0)
continue;
ch = &moxaChannels[card * MAX_PORTS_PER_BOARD];
for (i = 0; i < ports; i++, ch++) {
if ((ch->asyncflags & ASYNC_INITIALIZED) == 0)
continue;
if (!(ch->statusflags & THROTTLE) &&
(MoxaPortRxQueue(ch->port) > 0))
receive_data(ch);
if ((tp = ch->tty) == 0)
continue;
if (ch->statusflags & LOWWAIT) {
if (MoxaPortTxQueue(ch->port) <= WAKEUP_CHARS) {
if (!tp->stopped) {
ch->statusflags &= ~LOWWAIT;
tty_wakeup(tp);
}
}
}
if (!I_IGNBRK(tp) && (MoxaPortResetBrkCnt(ch->port) > 0)) {
tty_insert_flip_char(tp, 0, TTY_BREAK);
tty_schedule_flip(tp);
}
if (MoxaPortDCDChange(ch->port)) {
if (ch->asyncflags & ASYNC_CHECK_CD) {
if (MoxaPortDCDON(ch->port))
wake_up_interruptible(&ch->open_wait);
else {
set_bit(MOXA_EVENT_HANGUP, &ch->event);
schedule_work(&ch->tqueue);
}
}
}
}
}
moxaTimer.function = moxa_poll;
moxaTimer.expires = jiffies + (HZ / 50);
moxaTimer_on = 1;
add_timer(&moxaTimer);
}
/******************************************************************************/
static void set_tty_param(struct tty_struct *tty)
{
register struct termios *ts;
struct moxa_str *ch;
int rts, cts, txflow, rxflow, xany;
ch = (struct moxa_str *) tty->driver_data;
ts = tty->termios;
if (ts->c_cflag & CLOCAL)
ch->asyncflags &= ~ASYNC_CHECK_CD;
else
ch->asyncflags |= ASYNC_CHECK_CD;
rts = cts = txflow = rxflow = xany = 0;
if (ts->c_cflag & CRTSCTS)
rts = cts = 1;
if (ts->c_iflag & IXON)
txflow = 1;
if (ts->c_iflag & IXOFF)
rxflow = 1;
if (ts->c_iflag & IXANY)
xany = 1;
MoxaPortFlowCtrl(ch->port, rts, cts, txflow, rxflow, xany);
MoxaPortSetTermio(ch->port, ts);
}
static int block_till_ready(struct tty_struct *tty, struct file *filp,
struct moxa_str *ch)
{
DECLARE_WAITQUEUE(wait,current);
unsigned long flags;
int retval;
int do_clocal = C_CLOCAL(tty);
/*
* If the device is in the middle of being closed, then block
* until it's done, and then try again.
*/
if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) {
if (ch->asyncflags & ASYNC_CLOSING)
interruptible_sleep_on(&ch->close_wait);
#ifdef SERIAL_DO_RESTART
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
return (-EAGAIN);
else
return (-ERESTARTSYS);
#else
return (-EAGAIN);
#endif
}
/*
* If non-blocking mode is set, then make the check up front
* and then exit.
*/
if (filp->f_flags & O_NONBLOCK) {
ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
return (0);
}
/*
* Block waiting for the carrier detect and the line to become free
*/
retval = 0;
add_wait_queue(&ch->open_wait, &wait);
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready before block: ttys%d, count = %d\n",
ch->line, ch->count);
#endif
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_lock_irqsave(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!tty_hung_up_p(filp))
ch->count--;
ch->blocked_open++;
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_unlock_irqrestore(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
!(ch->asyncflags & ASYNC_INITIALIZED)) {
#ifdef SERIAL_DO_RESTART
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
#else
retval = -EAGAIN;
#endif
break;
}
if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
MoxaPortDCDON(ch->port)))
break;
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
schedule();
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&ch->open_wait, &wait);
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_lock_irqsave(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!tty_hung_up_p(filp))
ch->count++;
ch->blocked_open--;
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_unlock_irqrestore(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready after blocking: ttys%d, count = %d\n",
ch->line, ch->count);
#endif
if (retval)
return (retval);
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
/* FIXME: review to see if we need to use set_bit on these */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
static void setup_empty_event(struct tty_struct *tty)
{
struct moxa_str *ch = tty->driver_data;
unsigned long flags;
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_lock_irqsave(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ch->statusflags |= EMPTYWAIT;
moxaEmptyTimer_on[ch->port] = 0;
del_timer(&moxaEmptyTimer[ch->port]);
moxaEmptyTimer[ch->port].expires = jiffies + HZ;
moxaEmptyTimer_on[ch->port] = 1;
add_timer(&moxaEmptyTimer[ch->port]);
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_unlock_irqrestore(&moxa_lock, flags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
static void check_xmit_empty(unsigned long data)
{
struct moxa_str *ch;
ch = (struct moxa_str *) data;
moxaEmptyTimer_on[ch->port] = 0;
del_timer(&moxaEmptyTimer[ch->port]);
if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
if (MoxaPortTxQueue(ch->port) == 0) {
ch->statusflags &= ~EMPTYWAIT;
tty_wakeup(ch->tty);
return;
}
moxaEmptyTimer[ch->port].expires = jiffies + HZ;
moxaEmptyTimer_on[ch->port] = 1;
add_timer(&moxaEmptyTimer[ch->port]);
} else
ch->statusflags &= ~EMPTYWAIT;
}
static void shut_down(struct moxa_str *ch)
{
struct tty_struct *tp;
if (!(ch->asyncflags & ASYNC_INITIALIZED))
return;
tp = ch->tty;
MoxaPortDisable(ch->port);
/*
* If we're a modem control device and HUPCL is on, drop RTS & DTR.
*/
if (tp->termios->c_cflag & HUPCL)
MoxaPortLineCtrl(ch->port, 0, 0);
ch->asyncflags &= ~ASYNC_INITIALIZED;
}
static void receive_data(struct moxa_str *ch)
{
struct tty_struct *tp;
struct termios *ts;
unsigned long flags;
ts = NULL;
tp = ch->tty;
if (tp)
ts = tp->termios;
/**************************************************
if ( !tp || !ts || !(ts->c_cflag & CREAD) ) {
*****************************************************/
if (!tp || !ts) {
MoxaPortFlushData(ch->port, 0);
return;
}
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
spin_lock_irqsave(&moxa_lock, flags);
MoxaPortReadData(ch->port, tp);
spin_unlock_irqrestore(&moxa_lock, flags);
tty_schedule_flip(tp);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
#define Magic_code 0x404
/*
* System Configuration
*/
/*
* for C218 BIOS initialization
*/
#define C218_ConfBase 0x800
#define C218_status (C218_ConfBase + 0) /* BIOS running status */
#define C218_diag (C218_ConfBase + 2) /* diagnostic status */
#define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */
#define C218DLoad_len (C218_ConfBase + 6) /* WORD */
#define C218check_sum (C218_ConfBase + 8) /* BYTE */
#define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */
#define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */
#define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */
#define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */
#define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */
#define C218_LoadBuf 0x0F00
#define C218_KeyCode 0x218
#define CP204J_KeyCode 0x204
/*
* for C320 BIOS initialization
*/
#define C320_ConfBase 0x800
#define C320_LoadBuf 0x0f00
#define STS_init 0x05 /* for C320_status */
#define C320_status C320_ConfBase + 0 /* BIOS running status */
#define C320_diag C320_ConfBase + 2 /* diagnostic status */
#define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */
#define C320DLoad_len C320_ConfBase + 6 /* WORD */
#define C320check_sum C320_ConfBase + 8 /* WORD */
#define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */
#define C320bapi_len C320_ConfBase + 0x0c /* WORD */
#define C320UART_no C320_ConfBase + 0x0e /* WORD */
#define C320_KeyCode 0x320
#define FixPage_addr 0x0000 /* starting addr of static page */
#define DynPage_addr 0x2000 /* starting addr of dynamic page */
#define C218_start 0x3000 /* starting addr of C218 BIOS prg */
#define Control_reg 0x1ff0 /* select page and reset control */
#define HW_reset 0x80
/*
* Function Codes
*/
#define FC_CardReset 0x80
#define FC_ChannelReset 1 /* C320 firmware not supported */
#define FC_EnableCH 2
#define FC_DisableCH 3
#define FC_SetParam 4
#define FC_SetMode 5
#define FC_SetRate 6
#define FC_LineControl 7
#define FC_LineStatus 8
#define FC_XmitControl 9
#define FC_FlushQueue 10
#define FC_SendBreak 11
#define FC_StopBreak 12
#define FC_LoopbackON 13
#define FC_LoopbackOFF 14
#define FC_ClrIrqTable 15
#define FC_SendXon 16
#define FC_SetTermIrq 17 /* C320 firmware not supported */
#define FC_SetCntIrq 18 /* C320 firmware not supported */
#define FC_SetBreakIrq 19
#define FC_SetLineIrq 20
#define FC_SetFlowCtl 21
#define FC_GenIrq 22
#define FC_InCD180 23
#define FC_OutCD180 24
#define FC_InUARTreg 23
#define FC_OutUARTreg 24
#define FC_SetXonXoff 25
#define FC_OutCD180CCR 26
#define FC_ExtIQueue 27
#define FC_ExtOQueue 28
#define FC_ClrLineIrq 29
#define FC_HWFlowCtl 30
#define FC_GetClockRate 35
#define FC_SetBaud 36
#define FC_SetDataMode 41
#define FC_GetCCSR 43
#define FC_GetDataError 45
#define FC_RxControl 50
#define FC_ImmSend 51
#define FC_SetXonState 52
#define FC_SetXoffState 53
#define FC_SetRxFIFOTrig 54
#define FC_SetTxFIFOCnt 55
#define FC_UnixRate 56
#define FC_UnixResetTimer 57
#define RxFIFOTrig1 0
#define RxFIFOTrig4 1
#define RxFIFOTrig8 2
#define RxFIFOTrig14 3
/*
* Dual-Ported RAM
*/
#define DRAM_global 0
#define INT_data (DRAM_global + 0)
#define Config_base (DRAM_global + 0x108)
#define IRQindex (INT_data + 0)
#define IRQpending (INT_data + 4)
#define IRQtable (INT_data + 8)
/*
* Interrupt Status
*/
#define IntrRx 0x01 /* receiver data O.K. */
#define IntrTx 0x02 /* transmit buffer empty */
#define IntrFunc 0x04 /* function complete */
#define IntrBreak 0x08 /* received break */
#define IntrLine 0x10 /* line status change
for transmitter */
#define IntrIntr 0x20 /* received INTR code */
#define IntrQuit 0x40 /* received QUIT code */
#define IntrEOF 0x80 /* received EOF code */
#define IntrRxTrigger 0x100 /* rx data count reach tigger value */
#define IntrTxTrigger 0x200 /* tx data count below trigger value */
#define Magic_no (Config_base + 0)
#define Card_model_no (Config_base + 2)
#define Total_ports (Config_base + 4)
#define Module_cnt (Config_base + 8)
#define Module_no (Config_base + 10)
#define Timer_10ms (Config_base + 14)
#define Disable_IRQ (Config_base + 20)
#define TMS320_PORT1 (Config_base + 22)
#define TMS320_PORT2 (Config_base + 24)
#define TMS320_CLOCK (Config_base + 26)
/*
* DATA BUFFER in DRAM
*/
#define Extern_table 0x400 /* Base address of the external table
(24 words * 64) total 3K bytes
(24 words * 128) total 6K bytes */
#define Extern_size 0x60 /* 96 bytes */
#define RXrptr 0x00 /* read pointer for RX buffer */
#define RXwptr 0x02 /* write pointer for RX buffer */
#define TXrptr 0x04 /* read pointer for TX buffer */
#define TXwptr 0x06 /* write pointer for TX buffer */
#define HostStat 0x08 /* IRQ flag and general flag */
#define FlagStat 0x0A
#define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */
/* x x x x | | | | */
/* | | | + CTS flow */
/* | | +--- RTS flow */
/* | +------ TX Xon/Xoff */
/* +--------- RX Xon/Xoff */
#define Break_cnt 0x0E /* received break count */
#define CD180TXirq 0x10 /* if non-0: enable TX irq */
#define RX_mask 0x12
#define TX_mask 0x14
#define Ofs_rxb 0x16
#define Ofs_txb 0x18
#define Page_rxb 0x1A
#define Page_txb 0x1C
#define EndPage_rxb 0x1E
#define EndPage_txb 0x20
#define Data_error 0x22
#define RxTrigger 0x28
#define TxTrigger 0x2a
#define rRXwptr 0x34
#define Low_water 0x36
#define FuncCode 0x40
#define FuncArg 0x42
#define FuncArg1 0x44
#define C218rx_size 0x2000 /* 8K bytes */
#define C218tx_size 0x8000 /* 32K bytes */
#define C218rx_mask (C218rx_size - 1)
#define C218tx_mask (C218tx_size - 1)
#define C320p8rx_size 0x2000
#define C320p8tx_size 0x8000
#define C320p8rx_mask (C320p8rx_size - 1)
#define C320p8tx_mask (C320p8tx_size - 1)
#define C320p16rx_size 0x2000
#define C320p16tx_size 0x4000
#define C320p16rx_mask (C320p16rx_size - 1)
#define C320p16tx_mask (C320p16tx_size - 1)
#define C320p24rx_size 0x2000
#define C320p24tx_size 0x2000
#define C320p24rx_mask (C320p24rx_size - 1)
#define C320p24tx_mask (C320p24tx_size - 1)
#define C320p32rx_size 0x1000
#define C320p32tx_size 0x1000
#define C320p32rx_mask (C320p32rx_size - 1)
#define C320p32tx_mask (C320p32tx_size - 1)
#define Page_size 0x2000
#define Page_mask (Page_size - 1)
#define C218rx_spage 3
#define C218tx_spage 4
#define C218rx_pageno 1
#define C218tx_pageno 4
#define C218buf_pageno 5
#define C320p8rx_spage 3
#define C320p8tx_spage 4
#define C320p8rx_pgno 1
#define C320p8tx_pgno 4
#define C320p8buf_pgno 5
#define C320p16rx_spage 3
#define C320p16tx_spage 4
#define C320p16rx_pgno 1
#define C320p16tx_pgno 2
#define C320p16buf_pgno 3
#define C320p24rx_spage 3
#define C320p24tx_spage 4
#define C320p24rx_pgno 1
#define C320p24tx_pgno 1
#define C320p24buf_pgno 2
#define C320p32rx_spage 3
#define C320p32tx_ofs C320p32rx_size
#define C320p32tx_spage 3
#define C320p32buf_pgno 1
/*
* Host Status
*/
#define WakeupRx 0x01
#define WakeupTx 0x02
#define WakeupBreak 0x08
#define WakeupLine 0x10
#define WakeupIntr 0x20
#define WakeupQuit 0x40
#define WakeupEOF 0x80 /* used in VTIME control */
#define WakeupRxTrigger 0x100
#define WakeupTxTrigger 0x200
/*
* Flag status
*/
#define Rx_over 0x01
#define Xoff_state 0x02
#define Tx_flowOff 0x04
#define Tx_enable 0x08
#define CTS_state 0x10
#define DSR_state 0x20
#define DCD_state 0x80
/*
* FlowControl
*/
#define CTS_FlowCtl 1
#define RTS_FlowCtl 2
#define Tx_FlowCtl 4
#define Rx_FlowCtl 8
#define IXM_IXANY 0x10
#define LowWater 128
#define DTR_ON 1
#define RTS_ON 2
#define CTS_ON 1
#define DSR_ON 2
#define DCD_ON 8
/* mode definition */
#define MX_CS8 0x03
#define MX_CS7 0x02
#define MX_CS6 0x01
#define MX_CS5 0x00
#define MX_STOP1 0x00
#define MX_STOP15 0x04
#define MX_STOP2 0x08
#define MX_PARNONE 0x00
#define MX_PAREVEN 0x40
#define MX_PARODD 0xC0
/*
* Query
*/
#define QueryPort MAX_PORTS
struct mon_str {
int tick;
int rxcnt[MAX_PORTS];
int txcnt[MAX_PORTS];
};
typedef struct mon_str mon_st;
#define DCD_changed 0x01
#define DCD_oldstate 0x80
static unsigned char moxaBuff[10240];
static void __iomem *moxaIntNdx[MAX_BOARDS];
static void __iomem *moxaIntPend[MAX_BOARDS];
static void __iomem *moxaIntTable[MAX_BOARDS];
static char moxaChkPort[MAX_PORTS];
static char moxaLineCtrl[MAX_PORTS];
static void __iomem *moxaTableAddr[MAX_PORTS];
static long moxaCurBaud[MAX_PORTS];
static char moxaDCDState[MAX_PORTS];
static char moxaLowChkFlag[MAX_PORTS];
static int moxaLowWaterChk;
static int moxaCard;
static mon_st moxaLog;
static int moxaFuncTout;
static ushort moxaBreakCnt[MAX_PORTS];
static void moxadelay(int);
static void moxafunc(void __iomem *, int, ushort);
static void wait_finish(void __iomem *);
static void low_water_check(void __iomem *);
static int moxaloadbios(int, unsigned char __user *, int);
static int moxafindcard(int);
static int moxaload320b(int, unsigned char __user *, int);
static int moxaloadcode(int, unsigned char __user *, int);
static int moxaloadc218(int, void __iomem *, int);
static int moxaloadc320(int, void __iomem *, int, int *);
/*****************************************************************************
* Driver level functions: *
* 1. MoxaDriverInit(void); *
* 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); *
* 3. MoxaDriverPoll(void); *
*****************************************************************************/
void MoxaDriverInit(void)
{
int i;
moxaFuncTout = HZ / 2; /* 500 mini-seconds */
moxaCard = 0;
moxaLog.tick = 0;
moxaLowWaterChk = 0;
for (i = 0; i < MAX_PORTS; i++) {
moxaChkPort[i] = 0;
moxaLowChkFlag[i] = 0;
moxaLineCtrl[i] = 0;
moxaLog.rxcnt[i] = 0;
moxaLog.txcnt[i] = 0;
}
}
#define MOXA 0x400
#define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
#define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
#define MOXA_INIT_DRIVER (MOXA + 6) /* moxaCard=0 */
#define MOXA_LOAD_BIOS (MOXA + 9) /* download BIOS */
#define MOXA_FIND_BOARD (MOXA + 10) /* Check if MOXA card exist? */
#define MOXA_LOAD_C320B (MOXA + 11) /* download 320B firmware */
#define MOXA_LOAD_CODE (MOXA + 12) /* download firmware */
#define MOXA_GETDATACOUNT (MOXA + 23)
#define MOXA_GET_IOQUEUE (MOXA + 27)
#define MOXA_FLUSH_QUEUE (MOXA + 28)
#define MOXA_GET_CONF (MOXA + 35) /* configuration */
#define MOXA_GET_MAJOR (MOXA + 63)
#define MOXA_GET_CUMAJOR (MOXA + 64)
#define MOXA_GETMSTATUS (MOXA + 65)
struct moxaq_str {
int inq;
int outq;
};
struct dl_str {
char __user *buf;
int len;
int cardno;
};
static struct moxaq_str temp_queue[MAX_PORTS];
static struct dl_str dltmp;
void MoxaPortFlushData(int port, int mode)
{
void __iomem *ofsAddr;
if ((mode < 0) || (mode > 2))
return;
ofsAddr = moxaTableAddr[port];
moxafunc(ofsAddr, FC_FlushQueue, mode);
if (mode != 1) {
moxaLowChkFlag[port] = 0;
low_water_check(ofsAddr);
}
}
int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port)
{
int i;
int status;
int MoxaPortTxQueue(int), MoxaPortRxQueue(int);
void __user *argp = (void __user *)arg;
if (port == QueryPort) {
if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_INIT_DRIVER) &&
(cmd != MOXA_LOAD_BIOS) && (cmd != MOXA_FIND_BOARD) && (cmd != MOXA_LOAD_C320B) &&
(cmd != MOXA_LOAD_CODE) && (cmd != MOXA_GETDATACOUNT) &&
(cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) &&
(cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS))
return (-EINVAL);
}
switch (cmd) {
case MOXA_GET_CONF:
if(copy_to_user(argp, &moxa_boards, MAX_BOARDS * sizeof(moxa_board_conf)))
return -EFAULT;
return (0);
case MOXA_INIT_DRIVER:
if ((int) arg == 0x404)
MoxaDriverInit();
return (0);
case MOXA_GETDATACOUNT:
moxaLog.tick = jiffies;
if(copy_to_user(argp, &moxaLog, sizeof(mon_st)))
return -EFAULT;
return (0);
case MOXA_FLUSH_QUEUE:
MoxaPortFlushData(port, arg);
return (0);
case MOXA_GET_IOQUEUE:
for (i = 0; i < MAX_PORTS; i++) {
if (moxaChkPort[i]) {
temp_queue[i].inq = MoxaPortRxQueue(i);
temp_queue[i].outq = MoxaPortTxQueue(i);
}
}
if(copy_to_user(argp, temp_queue, sizeof(struct moxaq_str) * MAX_PORTS))
return -EFAULT;
return (0);
case MOXA_GET_OQUEUE:
i = MoxaPortTxQueue(port);
return put_user(i, (unsigned long __user *)argp);
case MOXA_GET_IQUEUE:
i = MoxaPortRxQueue(port);
return put_user(i, (unsigned long __user *)argp);
case MOXA_GET_MAJOR:
if(copy_to_user(argp, &ttymajor, sizeof(int)))
return -EFAULT;
return 0;
case MOXA_GET_CUMAJOR:
i = 0;
if(copy_to_user(argp, &i, sizeof(int)))
return -EFAULT;
return 0;
case MOXA_GETMSTATUS:
for (i = 0; i < MAX_PORTS; i++) {
GMStatus[i].ri = 0;
GMStatus[i].dcd = 0;
GMStatus[i].dsr = 0;
GMStatus[i].cts = 0;
if (!moxaChkPort[i]) {
continue;
} else {
status = MoxaPortLineStatus(moxaChannels[i].port);
if (status & 1)
GMStatus[i].cts = 1;
if (status & 2)
GMStatus[i].dsr = 1;
if (status & 4)
GMStatus[i].dcd = 1;
}
if (!moxaChannels[i].tty || !moxaChannels[i].tty->termios)
GMStatus[i].cflag = moxaChannels[i].cflag;
else
GMStatus[i].cflag = moxaChannels[i].tty->termios->c_cflag;
}
if(copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MAX_PORTS))
return -EFAULT;
return 0;
default:
return (-ENOIOCTLCMD);
case MOXA_LOAD_BIOS:
case MOXA_FIND_BOARD:
case MOXA_LOAD_C320B:
case MOXA_LOAD_CODE:
[PATCH] moxa serial: add proper capability check This requires the proper capabilities for the moxa bios update ioctl's. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-09 22:35:28 +08:00
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
break;
}
if(copy_from_user(&dltmp, argp, sizeof(struct dl_str)))
return -EFAULT;
if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS)
return -EINVAL;
switch(cmd)
{
case MOXA_LOAD_BIOS:
i = moxaloadbios(dltmp.cardno, dltmp.buf, dltmp.len);
return (i);
case MOXA_FIND_BOARD:
return moxafindcard(dltmp.cardno);
case MOXA_LOAD_C320B:
moxaload320b(dltmp.cardno, dltmp.buf, dltmp.len);
default: /* to keep gcc happy */
return (0);
case MOXA_LOAD_CODE:
i = moxaloadcode(dltmp.cardno, dltmp.buf, dltmp.len);
if (i == -1)
return (-EFAULT);
return (i);
}
}
int MoxaDriverPoll(void)
{
register ushort temp;
register int card;
void __iomem *ofsAddr;
void __iomem *ip;
int port, p, ports;
if (moxaCard == 0)
return (-1);
for (card = 0; card < MAX_BOARDS; card++) {
if ((ports = moxa_boards[card].numPorts) == 0)
continue;
if (readb(moxaIntPend[card]) == 0xff) {
ip = moxaIntTable[card] + readb(moxaIntNdx[card]);
p = card * MAX_PORTS_PER_BOARD;
ports <<= 1;
for (port = 0; port < ports; port += 2, p++) {
if ((temp = readw(ip + port)) != 0) {
writew(0, ip + port);
ofsAddr = moxaTableAddr[p];
if (temp & IntrTx)
writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat);
if (temp & IntrBreak) {
moxaBreakCnt[p]++;
}
if (temp & IntrLine) {
if (readb(ofsAddr + FlagStat) & DCD_state) {
if ((moxaDCDState[p] & DCD_oldstate) == 0)
moxaDCDState[p] = (DCD_oldstate |
DCD_changed);
} else {
if (moxaDCDState[p] & DCD_oldstate)
moxaDCDState[p] = DCD_changed;
}
}
}
}
writeb(0, moxaIntPend[card]);
}
if (moxaLowWaterChk) {
p = card * MAX_PORTS_PER_BOARD;
for (port = 0; port < ports; port++, p++) {
if (moxaLowChkFlag[p]) {
moxaLowChkFlag[p] = 0;
ofsAddr = moxaTableAddr[p];
low_water_check(ofsAddr);
}
}
}
}
moxaLowWaterChk = 0;
return (0);
}
/*****************************************************************************
* Card level function: *
* 1. MoxaPortsOfCard(int cardno); *
*****************************************************************************/
int MoxaPortsOfCard(int cardno)
{
if (moxa_boards[cardno].boardType == 0)
return (0);
return (moxa_boards[cardno].numPorts);
}
/*****************************************************************************
* Port level functions: *
* 1. MoxaPortIsValid(int port); *
* 2. MoxaPortEnable(int port); *
* 3. MoxaPortDisable(int port); *
* 4. MoxaPortGetMaxBaud(int port); *
* 5. MoxaPortGetCurBaud(int port); *
* 6. MoxaPortSetBaud(int port, long baud); *
* 7. MoxaPortSetMode(int port, int databit, int stopbit, int parity); *
* 8. MoxaPortSetTermio(int port, unsigned char *termio); *
* 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
* 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
* 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
* 12. MoxaPortLineStatus(int port); *
* 13. MoxaPortDCDChange(int port); *
* 14. MoxaPortDCDON(int port); *
* 15. MoxaPortFlushData(int port, int mode); *
* 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
* 17. MoxaPortReadData(int port, struct tty_struct *tty); *
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* 18. MoxaPortTxBufSize(int port); *
* 19. MoxaPortRxBufSize(int port); *
* 20. MoxaPortTxQueue(int port); *
* 21. MoxaPortTxFree(int port); *
* 22. MoxaPortRxQueue(int port); *
* 23. MoxaPortRxFree(int port); *
* 24. MoxaPortTxDisable(int port); *
* 25. MoxaPortTxEnable(int port); *
* 26. MoxaPortGetBrkCnt(int port); *
* 27. MoxaPortResetBrkCnt(int port); *
* 28. MoxaPortSetXonXoff(int port, int xonValue, int xoffValue); *
* 29. MoxaPortIsTxHold(int port); *
* 30. MoxaPortSendBreak(int port, int ticks); *
*****************************************************************************/
/*
* Moxa Port Number Description:
*
* MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
* the port number using in MOXA driver functions will be 0 to 31 for
* first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
* to 127 for fourth. For example, if you setup three MOXA boards,
* first board is C218, second board is C320-16 and third board is
* C320-32. The port number of first board (C218 - 8 ports) is from
* 0 to 7. The port number of second board (C320 - 16 ports) is form
* 32 to 47. The port number of third board (C320 - 32 ports) is from
* 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
* 127 will be invalid.
*
*
* Moxa Functions Description:
*
* Function 1: Driver initialization routine, this routine must be
* called when initialized driver.
* Syntax:
* void MoxaDriverInit();
*
*
* Function 2: Moxa driver private IOCTL command processing.
* Syntax:
* int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
*
* unsigned int cmd : IOCTL command
* unsigned long arg : IOCTL argument
* int port : port number (0 - 127)
*
* return: 0 (OK)
* -EINVAL
* -ENOIOCTLCMD
*
*
* Function 3: Moxa driver polling process routine.
* Syntax:
* int MoxaDriverPoll(void);
*
* return: 0 ; polling O.K.
* -1 : no any Moxa card.
*
*
* Function 4: Get the ports of this card.
* Syntax:
* int MoxaPortsOfCard(int cardno);
*
* int cardno : card number (0 - 3)
*
* return: 0 : this card is invalid
* 8/16/24/32
*
*
* Function 5: Check this port is valid or invalid
* Syntax:
* int MoxaPortIsValid(int port);
* int port : port number (0 - 127, ref port description)
*
* return: 0 : this port is invalid
* 1 : this port is valid
*
*
* Function 6: Enable this port to start Tx/Rx data.
* Syntax:
* void MoxaPortEnable(int port);
* int port : port number (0 - 127)
*
*
* Function 7: Disable this port
* Syntax:
* void MoxaPortDisable(int port);
* int port : port number (0 - 127)
*
*
* Function 8: Get the maximun available baud rate of this port.
* Syntax:
* long MoxaPortGetMaxBaud(int port);
* int port : port number (0 - 127)
*
* return: 0 : this port is invalid
* 38400/57600/115200 bps
*
*
* Function 9: Get the current baud rate of this port.
* Syntax:
* long MoxaPortGetCurBaud(int port);
* int port : port number (0 - 127)
*
* return: 0 : this port is invalid
* 50 - 115200 bps
*
*
* Function 10: Setting baud rate of this port.
* Syntax:
* long MoxaPortSetBaud(int port, long baud);
* int port : port number (0 - 127)
* long baud : baud rate (50 - 115200)
*
* return: 0 : this port is invalid or baud < 50
* 50 - 115200 : the real baud rate set to the port, if
* the argument baud is large than maximun
* available baud rate, the real setting
* baud rate will be the maximun baud rate.
*
*
* Function 11: Setting the data-bits/stop-bits/parity of this port
* Syntax:
* int MoxaPortSetMode(int port, int databits, int stopbits, int parity);
* int port : port number (0 - 127)
* int databits : data bits (8/7/6/5)
* int stopbits : stop bits (2/1/0, 0 show 1.5 stop bits)
int parity : parity (0:None,1:Odd,2:Even,3:Mark,4:Space)
*
* return: -1 : invalid parameter
* 0 : setting O.K.
*
*
* Function 12: Configure the port.
* Syntax:
* int MoxaPortSetTermio(int port, struct termios *termio);
* int port : port number (0 - 127)
* struct termios * termio : termio structure pointer
*
* return: -1 : this port is invalid or termio == NULL
* 0 : setting O.K.
*
*
* Function 13: Get the DTR/RTS state of this port.
* Syntax:
* int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
* int port : port number (0 - 127)
* int * dtrState : pointer to INT to receive the current DTR
* state. (if NULL, this function will not
* write to this address)
* int * rtsState : pointer to INT to receive the current RTS
* state. (if NULL, this function will not
* write to this address)
*
* return: -1 : this port is invalid
* 0 : O.K.
*
*
* Function 14: Setting the DTR/RTS output state of this port.
* Syntax:
* void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
* int port : port number (0 - 127)
* int dtrState : DTR output state (0: off, 1: on)
* int rtsState : RTS output state (0: off, 1: on)
*
*
* Function 15: Setting the flow control of this port.
* Syntax:
* void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
* int txFlow,int xany);
* int port : port number (0 - 127)
* int rtsFlow : H/W RTS flow control (0: no, 1: yes)
* int ctsFlow : H/W CTS flow control (0: no, 1: yes)
* int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
* int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
* int xany : S/W XANY flow control (0: no, 1: yes)
*
*
* Function 16: Get ths line status of this port
* Syntax:
* int MoxaPortLineStatus(int port);
* int port : port number (0 - 127)
*
* return: Bit 0 - CTS state (0: off, 1: on)
* Bit 1 - DSR state (0: off, 1: on)
* Bit 2 - DCD state (0: off, 1: on)
*
*
* Function 17: Check the DCD state has changed since the last read
* of this function.
* Syntax:
* int MoxaPortDCDChange(int port);
* int port : port number (0 - 127)
*
* return: 0 : no changed
* 1 : DCD has changed
*
*
* Function 18: Check ths current DCD state is ON or not.
* Syntax:
* int MoxaPortDCDON(int port);
* int port : port number (0 - 127)
*
* return: 0 : DCD off
* 1 : DCD on
*
*
* Function 19: Flush the Rx/Tx buffer data of this port.
* Syntax:
* void MoxaPortFlushData(int port, int mode);
* int port : port number (0 - 127)
* int mode
* 0 : flush the Rx buffer
* 1 : flush the Tx buffer
* 2 : flush the Rx and Tx buffer
*
*
* Function 20: Write data.
* Syntax:
* int MoxaPortWriteData(int port, unsigned char * buffer, int length);
* int port : port number (0 - 127)
* unsigned char * buffer : pointer to write data buffer.
* int length : write data length
*
* return: 0 - length : real write data length
*
*
* Function 21: Read data.
* Syntax:
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
* int MoxaPortReadData(int port, struct tty_struct *tty);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* int port : port number (0 - 127)
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
* struct tty_struct *tty : tty for data
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*
* return: 0 - length : real read data length
*
*
* Function 22: Get the Tx buffer size of this port
* Syntax:
* int MoxaPortTxBufSize(int port);
* int port : port number (0 - 127)
*
* return: .. : Tx buffer size
*
*
* Function 23: Get the Rx buffer size of this port
* Syntax:
* int MoxaPortRxBufSize(int port);
* int port : port number (0 - 127)
*
* return: .. : Rx buffer size
*
*
* Function 24: Get the Tx buffer current queued data bytes
* Syntax:
* int MoxaPortTxQueue(int port);
* int port : port number (0 - 127)
*
* return: .. : Tx buffer current queued data bytes
*
*
* Function 25: Get the Tx buffer current free space
* Syntax:
* int MoxaPortTxFree(int port);
* int port : port number (0 - 127)
*
* return: .. : Tx buffer current free space
*
*
* Function 26: Get the Rx buffer current queued data bytes
* Syntax:
* int MoxaPortRxQueue(int port);
* int port : port number (0 - 127)
*
* return: .. : Rx buffer current queued data bytes
*
*
* Function 27: Get the Rx buffer current free space
* Syntax:
* int MoxaPortRxFree(int port);
* int port : port number (0 - 127)
*
* return: .. : Rx buffer current free space
*
*
* Function 28: Disable port data transmission.
* Syntax:
* void MoxaPortTxDisable(int port);
* int port : port number (0 - 127)
*
*
* Function 29: Enable port data transmission.
* Syntax:
* void MoxaPortTxEnable(int port);
* int port : port number (0 - 127)
*
*
* Function 30: Get the received BREAK signal count.
* Syntax:
* int MoxaPortGetBrkCnt(int port);
* int port : port number (0 - 127)
*
* return: 0 - .. : BREAK signal count
*
*
* Function 31: Get the received BREAK signal count and reset it.
* Syntax:
* int MoxaPortResetBrkCnt(int port);
* int port : port number (0 - 127)
*
* return: 0 - .. : BREAK signal count
*
*
* Function 32: Set the S/W flow control new XON/XOFF value, default
* XON is 0x11 & XOFF is 0x13.
* Syntax:
* void MoxaPortSetXonXoff(int port, int xonValue, int xoffValue);
* int port : port number (0 - 127)
* int xonValue : new XON value (0 - 255)
* int xoffValue : new XOFF value (0 - 255)
*
*
* Function 33: Check this port's transmission is hold by remote site
* because the flow control.
* Syntax:
* int MoxaPortIsTxHold(int port);
* int port : port number (0 - 127)
*
* return: 0 : normal
* 1 : hold by remote site
*
*
* Function 34: Send out a BREAK signal.
* Syntax:
* void MoxaPortSendBreak(int port, int ms100);
* int port : port number (0 - 127)
* int ms100 : break signal time interval.
* unit: 100 mini-second. if ms100 == 0, it will
* send out a about 250 ms BREAK signal.
*
*/
int MoxaPortIsValid(int port)
{
if (moxaCard == 0)
return (0);
if (moxaChkPort[port] == 0)
return (0);
return (1);
}
void MoxaPortEnable(int port)
{
void __iomem *ofsAddr;
int MoxaPortLineStatus(int);
short lowwater = 512;
ofsAddr = moxaTableAddr[port];
writew(lowwater, ofsAddr + Low_water);
moxaBreakCnt[port] = 0;
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
moxafunc(ofsAddr, FC_SetBreakIrq, 0);
} else {
writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
}
moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
moxafunc(ofsAddr, FC_FlushQueue, 2);
moxafunc(ofsAddr, FC_EnableCH, Magic_code);
MoxaPortLineStatus(port);
}
void MoxaPortDisable(int port)
{
void __iomem *ofsAddr = moxaTableAddr[port];
moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
writew(0, ofsAddr + HostStat);
moxafunc(ofsAddr, FC_DisableCH, Magic_code);
}
long MoxaPortGetMaxBaud(int port)
{
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI))
return (460800L);
else
return (921600L);
}
long MoxaPortSetBaud(int port, long baud)
{
void __iomem *ofsAddr;
long max, clock;
unsigned int val;
if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
return (0);
ofsAddr = moxaTableAddr[port];
if (baud > max)
baud = max;
if (max == 38400L)
clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
else if (max == 57600L)
clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
else
clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
val = clock / baud;
moxafunc(ofsAddr, FC_SetBaud, val);
baud = clock / val;
moxaCurBaud[port] = baud;
return (baud);
}
int MoxaPortSetTermio(int port, struct termios *termio)
{
void __iomem *ofsAddr;
tcflag_t cflag;
long baud;
tcflag_t mode = 0;
if (moxaChkPort[port] == 0 || termio == 0)
return (-1);
ofsAddr = moxaTableAddr[port];
cflag = termio->c_cflag; /* termio->c_cflag */
mode = termio->c_cflag & CSIZE;
if (mode == CS5)
mode = MX_CS5;
else if (mode == CS6)
mode = MX_CS6;
else if (mode == CS7)
mode = MX_CS7;
else if (mode == CS8)
mode = MX_CS8;
if (termio->c_cflag & CSTOPB) {
if (mode == MX_CS5)
mode |= MX_STOP15;
else
mode |= MX_STOP2;
} else
mode |= MX_STOP1;
if (termio->c_cflag & PARENB) {
if (termio->c_cflag & PARODD)
mode |= MX_PARODD;
else
mode |= MX_PAREVEN;
} else
mode |= MX_PARNONE;
moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
cflag &= (CBAUD | CBAUDEX);
#ifndef B921600
#define B921600 (B460800+1)
#endif
switch (cflag) {
case B921600:
baud = 921600L;
break;
case B460800:
baud = 460800L;
break;
case B230400:
baud = 230400L;
break;
case B115200:
baud = 115200L;
break;
case B57600:
baud = 57600L;
break;
case B38400:
baud = 38400L;
break;
case B19200:
baud = 19200L;
break;
case B9600:
baud = 9600L;
break;
case B4800:
baud = 4800L;
break;
case B2400:
baud = 2400L;
break;
case B1800:
baud = 1800L;
break;
case B1200:
baud = 1200L;
break;
case B600:
baud = 600L;
break;
case B300:
baud = 300L;
break;
case B200:
baud = 200L;
break;
case B150:
baud = 150L;
break;
case B134:
baud = 134L;
break;
case B110:
baud = 110L;
break;
case B75:
baud = 75L;
break;
case B50:
baud = 50L;
break;
default:
baud = 0;
}
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
if (baud == 921600L)
return (-1);
}
MoxaPortSetBaud(port, baud);
if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
writeb(FC_SetXonXoff, ofsAddr + FuncCode);
wait_finish(ofsAddr);
}
return (0);
}
int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState)
{
if (!MoxaPortIsValid(port))
return (-1);
if (dtrState) {
if (moxaLineCtrl[port] & DTR_ON)
*dtrState = 1;
else
*dtrState = 0;
}
if (rtsState) {
if (moxaLineCtrl[port] & RTS_ON)
*rtsState = 1;
else
*rtsState = 0;
}
return (0);
}
void MoxaPortLineCtrl(int port, int dtr, int rts)
{
void __iomem *ofsAddr;
int mode;
ofsAddr = moxaTableAddr[port];
mode = 0;
if (dtr)
mode |= DTR_ON;
if (rts)
mode |= RTS_ON;
moxaLineCtrl[port] = mode;
moxafunc(ofsAddr, FC_LineControl, mode);
}
void MoxaPortFlowCtrl(int port, int rts, int cts, int txflow, int rxflow, int txany)
{
void __iomem *ofsAddr;
int mode;
ofsAddr = moxaTableAddr[port];
mode = 0;
if (rts)
mode |= RTS_FlowCtl;
if (cts)
mode |= CTS_FlowCtl;
if (txflow)
mode |= Tx_FlowCtl;
if (rxflow)
mode |= Rx_FlowCtl;
if (txany)
mode |= IXM_IXANY;
moxafunc(ofsAddr, FC_SetFlowCtl, mode);
}
int MoxaPortLineStatus(int port)
{
void __iomem *ofsAddr;
int val;
ofsAddr = moxaTableAddr[port];
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
moxafunc(ofsAddr, FC_LineStatus, 0);
val = readw(ofsAddr + FuncArg);
} else {
val = readw(ofsAddr + FlagStat) >> 4;
}
val &= 0x0B;
if (val & 8) {
val |= 4;
if ((moxaDCDState[port] & DCD_oldstate) == 0)
moxaDCDState[port] = (DCD_oldstate | DCD_changed);
} else {
if (moxaDCDState[port] & DCD_oldstate)
moxaDCDState[port] = DCD_changed;
}
val &= 7;
return (val);
}
int MoxaPortDCDChange(int port)
{
int n;
if (moxaChkPort[port] == 0)
return (0);
n = moxaDCDState[port];
moxaDCDState[port] &= ~DCD_changed;
n &= DCD_changed;
return (n);
}
int MoxaPortDCDON(int port)
{
int n;
if (moxaChkPort[port] == 0)
return (0);
if (moxaDCDState[port] & DCD_oldstate)
n = 1;
else
n = 0;
return (n);
}
/*
int MoxaDumpMem(int port, unsigned char * buffer, int len)
{
int i;
unsigned long baseAddr,ofsAddr,ofs;
baseAddr = moxaBaseAddr[port / MAX_PORTS_PER_BOARD];
ofs = baseAddr + DynPage_addr + pageofs;
if (len > 0x2000L)
len = 0x2000L;
for (i = 0; i < len; i++)
buffer[i] = readb(ofs+i);
}
*/
int MoxaPortWriteData(int port, unsigned char * buffer, int len)
{
int c, total, i;
ushort tail;
int cnt;
ushort head, tx_mask, spage, epage;
ushort pageno, pageofs, bufhead;
void __iomem *baseAddr, *ofsAddr, *ofs;
ofsAddr = moxaTableAddr[port];
baseAddr = moxaBaseAddr[port / MAX_PORTS_PER_BOARD];
tx_mask = readw(ofsAddr + TX_mask);
spage = readw(ofsAddr + Page_txb);
epage = readw(ofsAddr + EndPage_txb);
tail = readw(ofsAddr + TXwptr);
head = readw(ofsAddr + TXrptr);
c = (head > tail) ? (head - tail - 1)
: (head - tail + tx_mask);
if (c > len)
c = len;
moxaLog.txcnt[port] += c;
total = c;
if (spage == epage) {
bufhead = readw(ofsAddr + Ofs_txb);
writew(spage, baseAddr + Control_reg);
while (c > 0) {
if (head > tail)
len = head - tail - 1;
else
len = tx_mask + 1 - tail;
len = (c > len) ? len : c;
ofs = baseAddr + DynPage_addr + bufhead + tail;
for (i = 0; i < len; i++)
writeb(*buffer++, ofs + i);
tail = (tail + len) & tx_mask;
c -= len;
}
writew(tail, ofsAddr + TXwptr);
} else {
len = c;
pageno = spage + (tail >> 13);
pageofs = tail & Page_mask;
do {
cnt = Page_size - pageofs;
if (cnt > c)
cnt = c;
c -= cnt;
writeb(pageno, baseAddr + Control_reg);
ofs = baseAddr + DynPage_addr + pageofs;
for (i = 0; i < cnt; i++)
writeb(*buffer++, ofs + i);
if (c == 0) {
writew((tail + len) & tx_mask, ofsAddr + TXwptr);
break;
}
if (++pageno == epage)
pageno = spage;
pageofs = 0;
} while (1);
}
writeb(1, ofsAddr + CD180TXirq); /* start to send */
return (total);
}
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
int MoxaPortReadData(int port, struct tty_struct *tty)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
register ushort head, pageofs;
int i, count, cnt, len, total, remain;
ushort tail, rx_mask, spage, epage;
ushort pageno, bufhead;
void __iomem *baseAddr, *ofsAddr, *ofs;
ofsAddr = moxaTableAddr[port];
baseAddr = moxaBaseAddr[port / MAX_PORTS_PER_BOARD];
head = readw(ofsAddr + RXrptr);
tail = readw(ofsAddr + RXwptr);
rx_mask = readw(ofsAddr + RX_mask);
spage = readw(ofsAddr + Page_rxb);
epage = readw(ofsAddr + EndPage_rxb);
count = (tail >= head) ? (tail - head)
: (tail - head + rx_mask + 1);
if (count == 0)
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
return 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
total = count;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
remain = count - total;
moxaLog.rxcnt[port] += total;
count = total;
if (spage == epage) {
bufhead = readw(ofsAddr + Ofs_rxb);
writew(spage, baseAddr + Control_reg);
while (count > 0) {
if (tail >= head)
len = tail - head;
else
len = rx_mask + 1 - head;
len = (count > len) ? len : count;
ofs = baseAddr + DynPage_addr + bufhead + head;
for (i = 0; i < len; i++)
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
head = (head + len) & rx_mask;
count -= len;
}
writew(head, ofsAddr + RXrptr);
} else {
len = count;
pageno = spage + (head >> 13);
pageofs = head & Page_mask;
do {
cnt = Page_size - pageofs;
if (cnt > count)
cnt = count;
count -= cnt;
writew(pageno, baseAddr + Control_reg);
ofs = baseAddr + DynPage_addr + pageofs;
for (i = 0; i < cnt; i++)
[PATCH] TTY layer buffering revamp The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10 12:54:13 +08:00
tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (count == 0) {
writew((head + len) & rx_mask, ofsAddr + RXrptr);
break;
}
if (++pageno == epage)
pageno = spage;
pageofs = 0;
} while (1);
}
if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) {
moxaLowWaterChk = 1;
moxaLowChkFlag[port] = 1;
}
return (total);
}
int MoxaPortTxQueue(int port)
{
void __iomem *ofsAddr;
ushort rptr, wptr, mask;
int len;
ofsAddr = moxaTableAddr[port];
rptr = readw(ofsAddr + TXrptr);
wptr = readw(ofsAddr + TXwptr);
mask = readw(ofsAddr + TX_mask);
len = (wptr - rptr) & mask;
return (len);
}
int MoxaPortTxFree(int port)
{
void __iomem *ofsAddr;
ushort rptr, wptr, mask;
int len;
ofsAddr = moxaTableAddr[port];
rptr = readw(ofsAddr + TXrptr);
wptr = readw(ofsAddr + TXwptr);
mask = readw(ofsAddr + TX_mask);
len = mask - ((wptr - rptr) & mask);
return (len);
}
int MoxaPortRxQueue(int port)
{
void __iomem *ofsAddr;
ushort rptr, wptr, mask;
int len;
ofsAddr = moxaTableAddr[port];
rptr = readw(ofsAddr + RXrptr);
wptr = readw(ofsAddr + RXwptr);
mask = readw(ofsAddr + RX_mask);
len = (wptr - rptr) & mask;
return (len);
}
void MoxaPortTxDisable(int port)
{
void __iomem *ofsAddr;
ofsAddr = moxaTableAddr[port];
moxafunc(ofsAddr, FC_SetXoffState, Magic_code);
}
void MoxaPortTxEnable(int port)
{
void __iomem *ofsAddr;
ofsAddr = moxaTableAddr[port];
moxafunc(ofsAddr, FC_SetXonState, Magic_code);
}
int MoxaPortResetBrkCnt(int port)
{
ushort cnt;
cnt = moxaBreakCnt[port];
moxaBreakCnt[port] = 0;
return (cnt);
}
void MoxaPortSendBreak(int port, int ms100)
{
void __iomem *ofsAddr;
ofsAddr = moxaTableAddr[port];
if (ms100) {
moxafunc(ofsAddr, FC_SendBreak, Magic_code);
moxadelay(ms100 * (HZ / 10));
} else {
moxafunc(ofsAddr, FC_SendBreak, Magic_code);
moxadelay(HZ / 4); /* 250 ms */
}
moxafunc(ofsAddr, FC_StopBreak, Magic_code);
}
static int moxa_get_serial_info(struct moxa_str *info,
struct serial_struct __user *retinfo)
{
struct serial_struct tmp;
memset(&tmp, 0, sizeof(tmp));
tmp.type = info->type;
tmp.line = info->port;
tmp.port = 0;
tmp.irq = 0;
tmp.flags = info->asyncflags;
tmp.baud_base = 921600;
tmp.close_delay = info->close_delay;
tmp.closing_wait = info->closing_wait;
tmp.custom_divisor = 0;
tmp.hub6 = 0;
if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return (0);
}
static int moxa_set_serial_info(struct moxa_str *info,
struct serial_struct __user *new_info)
{
struct serial_struct new_serial;
if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
return -EFAULT;
if ((new_serial.irq != 0) ||
(new_serial.port != 0) ||
// (new_serial.type != info->type) ||
(new_serial.custom_divisor != 0) ||
(new_serial.baud_base != 921600))
return (-EPERM);
if (!capable(CAP_SYS_ADMIN)) {
if (((new_serial.flags & ~ASYNC_USR_MASK) !=
(info->asyncflags & ~ASYNC_USR_MASK)))
return (-EPERM);
} else {
info->close_delay = new_serial.close_delay * HZ / 100;
info->closing_wait = new_serial.closing_wait * HZ / 100;
}
new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
if (new_serial.type == PORT_16550A) {
MoxaSetFifo(info->port, 1);
} else {
MoxaSetFifo(info->port, 0);
}
info->type = new_serial.type;
return (0);
}
/*****************************************************************************
* Static local functions: *
*****************************************************************************/
/*
* moxadelay - delays a specified number ticks
*/
static void moxadelay(int tick)
{
unsigned long st, et;
st = jiffies;
et = st + tick;
while (time_before(jiffies, et));
}
static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
{
writew(arg, ofsAddr + FuncArg);
writew(cmd, ofsAddr + FuncCode);
wait_finish(ofsAddr);
}
static void wait_finish(void __iomem *ofsAddr)
{
unsigned long i, j;
i = jiffies;
while (readw(ofsAddr + FuncCode) != 0) {
j = jiffies;
if ((j - i) > moxaFuncTout) {
return;
}
}
}
static void low_water_check(void __iomem *ofsAddr)
{
int len;
ushort rptr, wptr, mask;
if (readb(ofsAddr + FlagStat) & Xoff_state) {
rptr = readw(ofsAddr + RXrptr);
wptr = readw(ofsAddr + RXwptr);
mask = readw(ofsAddr + RX_mask);
len = (wptr - rptr) & mask;
if (len <= Low_water)
moxafunc(ofsAddr, FC_SendXon, 0);
}
}
static int moxaloadbios(int cardno, unsigned char __user *tmp, int len)
{
void __iomem *baseAddr;
int i;
if(copy_from_user(moxaBuff, tmp, len))
return -EFAULT;
baseAddr = moxaBaseAddr[cardno];
writeb(HW_reset, baseAddr + Control_reg); /* reset */
moxadelay(1); /* delay 10 ms */
for (i = 0; i < 4096; i++)
writeb(0, baseAddr + i); /* clear fix page */
for (i = 0; i < len; i++)
writeb(moxaBuff[i], baseAddr + i); /* download BIOS */
writeb(0, baseAddr + Control_reg); /* restart */
return (0);
}
static int moxafindcard(int cardno)
{
void __iomem *baseAddr;
ushort tmp;
baseAddr = moxaBaseAddr[cardno];
switch (moxa_boards[cardno].boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
if ((tmp = readw(baseAddr + C218_key)) != C218_KeyCode) {
return (-1);
}
break;
case MOXA_BOARD_CP204J:
if ((tmp = readw(baseAddr + C218_key)) != CP204J_KeyCode) {
return (-1);
}
break;
default:
if ((tmp = readw(baseAddr + C320_key)) != C320_KeyCode) {
return (-1);
}
if ((tmp = readw(baseAddr + C320_status)) != STS_init) {
return (-2);
}
}
return (0);
}
static int moxaload320b(int cardno, unsigned char __user *tmp, int len)
{
void __iomem *baseAddr;
int i;
if(len > sizeof(moxaBuff))
return -EINVAL;
if(copy_from_user(moxaBuff, tmp, len))
return -EFAULT;
baseAddr = moxaBaseAddr[cardno];
writew(len - 7168 - 2, baseAddr + C320bapi_len);
writeb(1, baseAddr + Control_reg); /* Select Page 1 */
for (i = 0; i < 7168; i++)
writeb(moxaBuff[i], baseAddr + DynPage_addr + i);
writeb(2, baseAddr + Control_reg); /* Select Page 2 */
for (i = 0; i < (len - 7168); i++)
writeb(moxaBuff[i + 7168], baseAddr + DynPage_addr + i);
return (0);
}
static int moxaloadcode(int cardno, unsigned char __user *tmp, int len)
{
void __iomem *baseAddr, *ofsAddr;
int retval, port, i;
if(copy_from_user(moxaBuff, tmp, len))
return -EFAULT;
baseAddr = moxaBaseAddr[cardno];
switch (moxa_boards[cardno].boardType) {
case MOXA_BOARD_C218_ISA:
case MOXA_BOARD_C218_PCI:
case MOXA_BOARD_CP204J:
retval = moxaloadc218(cardno, baseAddr, len);
if (retval)
return (retval);
port = cardno * MAX_PORTS_PER_BOARD;
for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
moxaChkPort[port] = 1;
moxaCurBaud[port] = 9600L;
moxaDCDState[port] = 0;
moxaTableAddr[port] = baseAddr + Extern_table + Extern_size * i;
ofsAddr = moxaTableAddr[port];
writew(C218rx_mask, ofsAddr + RX_mask);
writew(C218tx_mask, ofsAddr + TX_mask);
writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
}
break;
default:
retval = moxaloadc320(cardno, baseAddr, len,
&moxa_boards[cardno].numPorts);
if (retval)
return (retval);
port = cardno * MAX_PORTS_PER_BOARD;
for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
moxaChkPort[port] = 1;
moxaCurBaud[port] = 9600L;
moxaDCDState[port] = 0;
moxaTableAddr[port] = baseAddr + Extern_table + Extern_size * i;
ofsAddr = moxaTableAddr[port];
if (moxa_boards[cardno].numPorts == 8) {
writew(C320p8rx_mask, ofsAddr + RX_mask);
writew(C320p8tx_mask, ofsAddr + TX_mask);
writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
} else if (moxa_boards[cardno].numPorts == 16) {
writew(C320p16rx_mask, ofsAddr + RX_mask);
writew(C320p16tx_mask, ofsAddr + TX_mask);
writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
} else if (moxa_boards[cardno].numPorts == 24) {
writew(C320p24rx_mask, ofsAddr + RX_mask);
writew(C320p24tx_mask, ofsAddr + TX_mask);
writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
} else if (moxa_boards[cardno].numPorts == 32) {
writew(C320p32rx_mask, ofsAddr + RX_mask);
writew(C320p32tx_mask, ofsAddr + TX_mask);
writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
}
}
break;
}
return (0);
}
static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
{
char retry;
int i, j, len1, len2;
ushort usum, *ptr, keycode;
if (moxa_boards[cardno].boardType == MOXA_BOARD_CP204J)
keycode = CP204J_KeyCode;
else
keycode = C218_KeyCode;
usum = 0;
len1 = len >> 1;
ptr = (ushort *) moxaBuff;
for (i = 0; i < len1; i++)
usum += *(ptr + i);
retry = 0;
do {
len1 = len >> 1;
j = 0;
while (len1) {
len2 = (len1 > 2048) ? 2048 : len1;
len1 -= len2;
for (i = 0; i < len2 << 1; i++)
writeb(moxaBuff[i + j], baseAddr + C218_LoadBuf + i);
j += i;
writew(len2, baseAddr + C218DLoad_len);
writew(0, baseAddr + C218_key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + C218_key) == keycode)
break;
moxadelay(1); /* delay 10 ms */
}
if (readw(baseAddr + C218_key) != keycode) {
return (-1);
}
}
writew(0, baseAddr + C218DLoad_len);
writew(usum, baseAddr + C218check_sum);
writew(0, baseAddr + C218_key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + C218_key) == keycode)
break;
moxadelay(1); /* delay 10 ms */
}
retry++;
} while ((readb(baseAddr + C218chksum_ok) != 1) && (retry < 3));
if (readb(baseAddr + C218chksum_ok) != 1) {
return (-1);
}
writew(0, baseAddr + C218_key);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1); /* delay 10 ms */
}
if (readw(baseAddr + Magic_no) != Magic_code) {
return (-1);
}
writew(1, baseAddr + Disable_IRQ);
writew(0, baseAddr + Magic_no);
for (i = 0; i < 100; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1); /* delay 10 ms */
}
if (readw(baseAddr + Magic_no) != Magic_code) {
return (-1);
}
moxaCard = 1;
moxaIntNdx[cardno] = baseAddr + IRQindex;
moxaIntPend[cardno] = baseAddr + IRQpending;
moxaIntTable[cardno] = baseAddr + IRQtable;
return (0);
}
static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPorts)
{
ushort usum;
int i, j, wlen, len2, retry;
ushort *uptr;
usum = 0;
wlen = len >> 1;
uptr = (ushort *) moxaBuff;
for (i = 0; i < wlen; i++)
usum += uptr[i];
retry = 0;
j = 0;
do {
while (wlen) {
if (wlen > 2048)
len2 = 2048;
else
len2 = wlen;
wlen -= len2;
len2 <<= 1;
for (i = 0; i < len2; i++)
writeb(moxaBuff[j + i], baseAddr + C320_LoadBuf + i);
len2 >>= 1;
j += i;
writew(len2, baseAddr + C320DLoad_len);
writew(0, baseAddr + C320_key);
for (i = 0; i < 10; i++) {
if (readw(baseAddr + C320_key) == C320_KeyCode)
break;
moxadelay(1);
}
if (readw(baseAddr + C320_key) != C320_KeyCode)
return (-1);
}
writew(0, baseAddr + C320DLoad_len);
writew(usum, baseAddr + C320check_sum);
writew(0, baseAddr + C320_key);
for (i = 0; i < 10; i++) {
if (readw(baseAddr + C320_key) == C320_KeyCode)
break;
moxadelay(1);
}
retry++;
} while ((readb(baseAddr + C320chksum_ok) != 1) && (retry < 3));
if (readb(baseAddr + C320chksum_ok) != 1)
return (-1);
writew(0, baseAddr + C320_key);
for (i = 0; i < 600; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return (-100);
if (moxa_boards[cardno].busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
writew(0x3800, baseAddr + TMS320_PORT1);
writew(0x3900, baseAddr + TMS320_PORT2);
writew(28499, baseAddr + TMS320_CLOCK);
} else {
writew(0x3200, baseAddr + TMS320_PORT1);
writew(0x3400, baseAddr + TMS320_PORT2);
writew(19999, baseAddr + TMS320_CLOCK);
}
writew(1, baseAddr + Disable_IRQ);
writew(0, baseAddr + Magic_no);
for (i = 0; i < 500; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return (-102);
j = readw(baseAddr + Module_cnt);
if (j <= 0)
return (-101);
*numPorts = j * 8;
writew(j, baseAddr + Module_no);
writew(0, baseAddr + Magic_no);
for (i = 0; i < 600; i++) {
if (readw(baseAddr + Magic_no) == Magic_code)
break;
moxadelay(1);
}
if (readw(baseAddr + Magic_no) != Magic_code)
return (-102);
moxaCard = 1;
moxaIntNdx[cardno] = baseAddr + IRQindex;
moxaIntPend[cardno] = baseAddr + IRQpending;
moxaIntTable[cardno] = baseAddr + IRQtable;
return (0);
}
#if 0
long MoxaPortGetCurBaud(int port)
{
if (moxaChkPort[port] == 0)
return (0);
return (moxaCurBaud[port]);
}
#endif /* 0 */
static void MoxaSetFifo(int port, int enable)
{
void __iomem *ofsAddr = moxaTableAddr[port];
if (!enable) {
moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
} else {
moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
}
}
#if 0
int MoxaPortSetMode(int port, int databits, int stopbits, int parity)
{
void __iomem *ofsAddr;
int val;
val = 0;
switch (databits) {
case 5:
val |= 0;
break;
case 6:
val |= 1;
break;
case 7:
val |= 2;
break;
case 8:
val |= 3;
break;
default:
return (-1);
}
switch (stopbits) {
case 0:
val |= 0;
break; /* stop bits 1.5 */
case 1:
val |= 0;
break;
case 2:
val |= 4;
break;
default:
return (-1);
}
switch (parity) {
case 0:
val |= 0x00;
break; /* None */
case 1:
val |= 0x08;
break; /* Odd */
case 2:
val |= 0x18;
break; /* Even */
case 3:
val |= 0x28;
break; /* Mark */
case 4:
val |= 0x38;
break; /* Space */
default:
return (-1);
}
ofsAddr = moxaTableAddr[port];
moxafunc(ofsAddr, FC_SetMode, val);
return (0);
}
int MoxaPortTxBufSize(int port)
{
void __iomem *ofsAddr;
int size;
ofsAddr = moxaTableAddr[port];
size = readw(ofsAddr + TX_mask);
return (size);
}
int MoxaPortRxBufSize(int port)
{
void __iomem *ofsAddr;
int size;
ofsAddr = moxaTableAddr[port];
size = readw(ofsAddr + RX_mask);
return (size);
}
int MoxaPortRxFree(int port)
{
void __iomem *ofsAddr;
ushort rptr, wptr, mask;
int len;
ofsAddr = moxaTableAddr[port];
rptr = readw(ofsAddr + RXrptr);
wptr = readw(ofsAddr + RXwptr);
mask = readw(ofsAddr + RX_mask);
len = mask - ((wptr - rptr) & mask);
return (len);
}
int MoxaPortGetBrkCnt(int port)
{
return (moxaBreakCnt[port]);
}
void MoxaPortSetXonXoff(int port, int xonValue, int xoffValue)
{
void __iomem *ofsAddr;
ofsAddr = moxaTableAddr[port];
writew(xonValue, ofsAddr + FuncArg);
writew(xoffValue, ofsAddr + FuncArg1);
writew(FC_SetXonXoff, ofsAddr + FuncCode);
wait_finish(ofsAddr);
}
int MoxaPortIsTxHold(int port)
{
void __iomem *ofsAddr;
int val;
ofsAddr = moxaTableAddr[port];
if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
(moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
moxafunc(ofsAddr, FC_GetCCSR, 0);
val = readw(ofsAddr + FuncArg);
if (val & 0x04)
return (1);
} else {
if (readw(ofsAddr + FlagStat) & Tx_flowOff)
return (1);
}
return (0);
}
#endif