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linux/drivers/scsi/g_NCR5380.c

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/*
* Generic Generic NCR5380 driver
*
* Copyright 1993, Drew Eckhardt
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@colorado.edu
* +1 (303) 440-4894
*
* NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
* K.Lentin@cs.monash.edu.au
*
* NCR53C400A extensions (c) 1996, Ingmar Baumgart
* ingmar@gonzo.schwaben.de
*
* DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
* ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
*
* Added ISAPNP support for DTC436 adapters,
* Thomas Sailer, sailer@ife.ee.ethz.ch
*
* See Documentation/scsi/g_NCR5380.txt for more info.
*/
#include <asm/io.h>
#include <linux/blkdev.h>
#include <linux/module.h>
#include <scsi/scsi_host.h>
#include "g_NCR5380.h"
#include "NCR5380.h"
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/isapnp.h>
#include <linux/interrupt.h>
static int ncr_irq;
static int ncr_dma;
static int ncr_addr;
static int ncr_5380;
static int ncr_53c400;
static int ncr_53c400a;
static int dtc_3181e;
static int hp_c2502;
static struct override {
NCR5380_map_type NCR5380_map_name;
int irq;
int dma;
int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
} overrides
#ifdef GENERIC_NCR5380_OVERRIDE
[] __initdata = GENERIC_NCR5380_OVERRIDE;
#else
[1] __initdata = { { 0,},};
#endif
#define NO_OVERRIDES ARRAY_SIZE(overrides)
#ifndef MODULE
/**
* internal_setup - handle lilo command string override
* @board: BOARD_* identifier for the board
* @str: unused
* @ints: numeric parameters
*
* Do LILO command line initialization of the overrides array. Display
* errors when needed
*
* Locks: none
*/
static void __init internal_setup(int board, char *str, int *ints)
{
static int commandline_current;
switch (board) {
case BOARD_NCR5380:
if (ints[0] != 2 && ints[0] != 3) {
printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
return;
}
break;
case BOARD_NCR53C400:
if (ints[0] != 2) {
printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
return;
}
break;
case BOARD_NCR53C400A:
if (ints[0] != 2) {
printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
return;
}
break;
case BOARD_DTC3181E:
if (ints[0] != 2) {
printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
return;
}
break;
}
if (commandline_current < NO_OVERRIDES) {
overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
overrides[commandline_current].irq = ints[2];
if (ints[0] == 3)
overrides[commandline_current].dma = ints[3];
else
overrides[commandline_current].dma = DMA_NONE;
overrides[commandline_current].board = board;
++commandline_current;
}
}
/**
* do_NCR53C80_setup - set up entry point
* @str: unused
*
* Setup function invoked at boot to parse the ncr5380= command
* line.
*/
static int __init do_NCR5380_setup(char *str)
{
int ints[10];
get_options(str, ARRAY_SIZE(ints), ints);
internal_setup(BOARD_NCR5380, str, ints);
return 1;
}
/**
* do_NCR53C400_setup - set up entry point
* @str: unused
* @ints: integer parameters from kernel setup code
*
* Setup function invoked at boot to parse the ncr53c400= command
* line.
*/
static int __init do_NCR53C400_setup(char *str)
{
int ints[10];
get_options(str, ARRAY_SIZE(ints), ints);
internal_setup(BOARD_NCR53C400, str, ints);
return 1;
}
/**
* do_NCR53C400A_setup - set up entry point
* @str: unused
* @ints: integer parameters from kernel setup code
*
* Setup function invoked at boot to parse the ncr53c400a= command
* line.
*/
static int __init do_NCR53C400A_setup(char *str)
{
int ints[10];
get_options(str, ARRAY_SIZE(ints), ints);
internal_setup(BOARD_NCR53C400A, str, ints);
return 1;
}
/**
* do_DTC3181E_setup - set up entry point
* @str: unused
* @ints: integer parameters from kernel setup code
*
* Setup function invoked at boot to parse the dtc3181e= command
* line.
*/
static int __init do_DTC3181E_setup(char *str)
{
int ints[10];
get_options(str, ARRAY_SIZE(ints), ints);
internal_setup(BOARD_DTC3181E, str, ints);
return 1;
}
#endif
#ifndef SCSI_G_NCR5380_MEM
/*
* Configure I/O address of 53C400A or DTC436 by writing magic numbers
* to ports 0x779 and 0x379.
*/
static void magic_configure(int idx, u8 irq, u8 magic[])
{
u8 cfg = 0;
outb(magic[0], 0x779);
outb(magic[1], 0x379);
outb(magic[2], 0x379);
outb(magic[3], 0x379);
outb(magic[4], 0x379);
/* allowed IRQs for HP C2502 */
if (irq != 2 && irq != 3 && irq != 4 && irq != 5 && irq != 7)
irq = 0;
if (idx >= 0 && idx <= 7)
cfg = 0x80 | idx | (irq << 4);
outb(cfg, 0x379);
}
#endif
/**
* generic_NCR5380_detect - look for NCR5380 controllers
* @tpnt: the scsi template
*
* Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
* and DTC436(ISAPnP) controllers. If overrides have been set we use
* them.
*
* Locks: none
*/
static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
{
static int current_override;
int count;
unsigned int *ports;
u8 *magic = NULL;
#ifndef SCSI_G_NCR5380_MEM
int i;
int port_idx = -1;
unsigned long region_size;
#endif
static unsigned int __initdata ncr_53c400a_ports[] = {
0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
};
static unsigned int __initdata dtc_3181e_ports[] = {
0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
};
static u8 ncr_53c400a_magic[] __initdata = { /* 53C400A & DTC436 */
0x59, 0xb9, 0xc5, 0xae, 0xa6
};
static u8 hp_c2502_magic[] __initdata = { /* HP C2502 */
0x0f, 0x22, 0xf0, 0x20, 0x80
};
int flags;
struct Scsi_Host *instance;
struct NCR5380_hostdata *hostdata;
#ifdef SCSI_G_NCR5380_MEM
unsigned long base;
void __iomem *iomem;
resource_size_t iomem_size;
#endif
if (ncr_irq)
overrides[0].irq = ncr_irq;
if (ncr_dma)
overrides[0].dma = ncr_dma;
if (ncr_addr)
overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
if (ncr_5380)
overrides[0].board = BOARD_NCR5380;
else if (ncr_53c400)
overrides[0].board = BOARD_NCR53C400;
else if (ncr_53c400a)
overrides[0].board = BOARD_NCR53C400A;
else if (dtc_3181e)
overrides[0].board = BOARD_DTC3181E;
else if (hp_c2502)
overrides[0].board = BOARD_HP_C2502;
#ifndef SCSI_G_NCR5380_MEM
if (!current_override && isapnp_present()) {
struct pnp_dev *dev = NULL;
count = 0;
while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
if (count >= NO_OVERRIDES)
break;
if (pnp_device_attach(dev) < 0)
continue;
if (pnp_activate_dev(dev) < 0) {
printk(KERN_ERR "dtc436e probe: activate failed\n");
pnp_device_detach(dev);
continue;
}
if (!pnp_port_valid(dev, 0)) {
printk(KERN_ERR "dtc436e probe: no valid port\n");
pnp_device_detach(dev);
continue;
}
if (pnp_irq_valid(dev, 0))
overrides[count].irq = pnp_irq(dev, 0);
else
overrides[count].irq = NO_IRQ;
if (pnp_dma_valid(dev, 0))
overrides[count].dma = pnp_dma(dev, 0);
else
overrides[count].dma = DMA_NONE;
overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
overrides[count].board = BOARD_DTC3181E;
count++;
}
}
#endif
for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
if (!(overrides[current_override].NCR5380_map_name))
continue;
ports = NULL;
flags = 0;
switch (overrides[current_override].board) {
case BOARD_NCR5380:
flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP;
break;
case BOARD_NCR53C400A:
ports = ncr_53c400a_ports;
magic = ncr_53c400a_magic;
break;
case BOARD_HP_C2502:
ports = ncr_53c400a_ports;
magic = hp_c2502_magic;
break;
case BOARD_DTC3181E:
ports = dtc_3181e_ports;
magic = ncr_53c400a_magic;
break;
}
#ifndef SCSI_G_NCR5380_MEM
if (ports && magic) {
/* wakeup sequence for the NCR53C400A and DTC3181E */
/* Disable the adapter and look for a free io port */
magic_configure(-1, 0, magic);
region_size = 16;
if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
for (i = 0; ports[i]; i++) {
if (!request_region(ports[i], region_size, "ncr53c80"))
continue;
if (overrides[current_override].NCR5380_map_name == ports[i])
break;
release_region(ports[i], region_size);
} else
for (i = 0; ports[i]; i++) {
if (!request_region(ports[i], region_size, "ncr53c80"))
continue;
if (inb(ports[i]) == 0xff)
break;
release_region(ports[i], region_size);
}
if (ports[i]) {
/* At this point we have our region reserved */
magic_configure(i, 0, magic); /* no IRQ yet */
outb(0xc0, ports[i] + 9);
if (inb(ports[i] + 9) != 0x80)
continue;
overrides[current_override].NCR5380_map_name = ports[i];
port_idx = i;
} else
continue;
}
else
{
/* Not a 53C400A style setup - just grab */
region_size = 8;
if (!request_region(overrides[current_override].NCR5380_map_name,
region_size, "ncr5380"))
continue;
}
#else
base = overrides[current_override].NCR5380_map_name;
iomem_size = NCR53C400_region_size;
if (!request_mem_region(base, iomem_size, "ncr5380"))
continue;
iomem = ioremap(base, iomem_size);
if (!iomem) {
release_mem_region(base, iomem_size);
continue;
}
#endif
instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
if (instance == NULL)
goto out_release;
hostdata = shost_priv(instance);
#ifndef SCSI_G_NCR5380_MEM
instance->io_port = overrides[current_override].NCR5380_map_name;
instance->n_io_port = region_size;
hostdata->io_width = 1; /* 8-bit PDMA by default */
/*
* On NCR53C400 boards, NCR5380 registers are mapped 8 past
* the base address.
*/
switch (overrides[current_override].board) {
case BOARD_NCR53C400:
instance->io_port += 8;
hostdata->c400_ctl_status = 0;
hostdata->c400_blk_cnt = 1;
hostdata->c400_host_buf = 4;
break;
case BOARD_DTC3181E:
hostdata->io_width = 2; /* 16-bit PDMA */
/* fall through */
case BOARD_NCR53C400A:
case BOARD_HP_C2502:
hostdata->c400_ctl_status = 9;
hostdata->c400_blk_cnt = 10;
hostdata->c400_host_buf = 8;
break;
}
#else
instance->base = overrides[current_override].NCR5380_map_name;
hostdata->iomem = iomem;
hostdata->iomem_size = iomem_size;
switch (overrides[current_override].board) {
case BOARD_NCR53C400:
hostdata->c400_ctl_status = 0x100;
hostdata->c400_blk_cnt = 0x101;
hostdata->c400_host_buf = 0x104;
break;
case BOARD_DTC3181E:
case BOARD_NCR53C400A:
case BOARD_HP_C2502:
pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
goto out_unregister;
}
#endif
if (NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP))
goto out_unregister;
switch (overrides[current_override].board) {
case BOARD_NCR53C400:
case BOARD_DTC3181E:
case BOARD_NCR53C400A:
case BOARD_HP_C2502:
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
}
NCR5380_maybe_reset_bus(instance);
if (overrides[current_override].irq != IRQ_AUTO)
instance->irq = overrides[current_override].irq;
else
instance->irq = NCR5380_probe_irq(instance, 0xffff);
/* Compatibility with documented NCR5380 kernel parameters */
if (instance->irq == 255)
instance->irq = NO_IRQ;
if (instance->irq != NO_IRQ) {
#ifndef SCSI_G_NCR5380_MEM
/* set IRQ for HP C2502 */
if (overrides[current_override].board == BOARD_HP_C2502)
magic_configure(port_idx, instance->irq, magic);
#endif
if (request_irq(instance->irq, generic_NCR5380_intr,
0, "NCR5380", instance)) {
printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
instance->irq = NO_IRQ;
}
}
if (instance->irq == NO_IRQ) {
printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
}
++current_override;
++count;
}
return count;
out_unregister:
scsi_unregister(instance);
out_release:
#ifndef SCSI_G_NCR5380_MEM
release_region(overrides[current_override].NCR5380_map_name, region_size);
#else
iounmap(iomem);
release_mem_region(base, iomem_size);
#endif
return count;
}
/**
* generic_NCR5380_release_resources - free resources
* @instance: host adapter to clean up
*
* Free the generic interface resources from this adapter.
*
* Locks: none
*/
static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
{
if (instance->irq != NO_IRQ)
free_irq(instance->irq, instance);
NCR5380_exit(instance);
#ifndef SCSI_G_NCR5380_MEM
release_region(instance->io_port, instance->n_io_port);
#else
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
iounmap(hostdata->iomem);
release_mem_region(instance->base, hostdata->iomem_size);
}
#endif
return 0;
}
/**
* generic_NCR5380_pread - pseudo DMA read
* @instance: adapter to read from
* @dst: buffer to read into
* @len: buffer length
*
* Perform a pseudo DMA mode read from an NCR53C400 or equivalent
* controller
*/
static inline int generic_NCR5380_pread(struct Scsi_Host *instance,
unsigned char *dst, int len)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int blocks = len / 128;
int start = 0;
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR);
NCR5380_write(hostdata->c400_blk_cnt, blocks);
while (1) {
if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
break;
if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
return -1;
}
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
if (hostdata->io_width == 2)
insw(instance->io_port + hostdata->c400_host_buf,
dst + start, 64);
else
insb(instance->io_port + hostdata->c400_host_buf,
dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_fromio(dst + start,
hostdata->iomem + NCR53C400_host_buffer, 128);
#endif
start += 128;
blocks--;
}
if (blocks) {
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; /* FIXME - no timeout */
#ifndef SCSI_G_NCR5380_MEM
if (hostdata->io_width == 2)
insw(instance->io_port + hostdata->c400_host_buf,
dst + start, 64);
else
insb(instance->io_port + hostdata->c400_host_buf,
dst + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_fromio(dst + start,
hostdata->iomem + NCR53C400_host_buffer, 128);
#endif
start += 128;
blocks--;
}
if (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ))
printk("53C400r: no 53C80 gated irq after transfer");
/* wait for 53C80 registers to be available */
while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG))
;
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
printk(KERN_ERR "53C400r: no end dma signal\n");
return 0;
}
/**
* generic_NCR5380_pwrite - pseudo DMA write
* @instance: adapter to read from
* @dst: buffer to read into
* @len: buffer length
*
* Perform a pseudo DMA mode read from an NCR53C400 or equivalent
* controller
*/
static inline int generic_NCR5380_pwrite(struct Scsi_Host *instance,
unsigned char *src, int len)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int blocks = len / 128;
int start = 0;
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
NCR5380_write(hostdata->c400_blk_cnt, blocks);
while (1) {
if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
return -1;
}
if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
break;
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - timeout
#ifndef SCSI_G_NCR5380_MEM
if (hostdata->io_width == 2)
outsw(instance->io_port + hostdata->c400_host_buf,
src + start, 64);
else
outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
src + start, 128);
#endif
start += 128;
blocks--;
}
if (blocks) {
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - no timeout
#ifndef SCSI_G_NCR5380_MEM
if (hostdata->io_width == 2)
outsw(instance->io_port + hostdata->c400_host_buf,
src + start, 64);
else
outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
#else
/* implies SCSI_G_NCR5380_MEM */
memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
src + start, 128);
#endif
start += 128;
blocks--;
}
/* wait for 53C80 registers to be available */
while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) {
udelay(4); /* DTC436 chip hangs without this */
/* FIXME - no timeout */
}
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
printk(KERN_ERR "53C400w: no end dma signal\n");
}
while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
; // TIMEOUT
return 0;
}
static int generic_NCR5380_dma_xfer_len(struct Scsi_Host *instance,
struct scsi_cmnd *cmd)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
int transfersize = cmd->transfersize;
if (hostdata->flags & FLAG_NO_PSEUDO_DMA)
return 0;
/* Limit transfers to 32K, for xx400 & xx406
* pseudoDMA that transfers in 128 bytes blocks.
*/
if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
!(cmd->SCp.this_residual % transfersize))
transfersize = 32 * 1024;
/* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */
if (transfersize % 128)
transfersize = 0;
return transfersize;
}
/*
* Include the NCR5380 core code that we build our driver around
*/
#include "NCR5380.c"
static struct scsi_host_template driver_template = {
.proc_name = DRV_MODULE_NAME,
.name = "Generic NCR5380/NCR53C400 SCSI",
.detect = generic_NCR5380_detect,
.release = generic_NCR5380_release_resources,
.info = generic_NCR5380_info,
.queuecommand = generic_NCR5380_queue_command,
.eh_abort_handler = generic_NCR5380_abort,
.eh_bus_reset_handler = generic_NCR5380_bus_reset,
.can_queue = 16,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
#include "scsi_module.c"
module_param(ncr_irq, int, 0);
module_param(ncr_dma, int, 0);
module_param(ncr_addr, int, 0);
module_param(ncr_5380, int, 0);
module_param(ncr_53c400, int, 0);
module_param(ncr_53c400a, int, 0);
module_param(dtc_3181e, int, 0);
module_param(hp_c2502, int, 0);
MODULE_LICENSE("GPL");
#if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
static struct isapnp_device_id id_table[] = {
{
ISAPNP_ANY_ID, ISAPNP_ANY_ID,
ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
0},
{0}
};
MODULE_DEVICE_TABLE(isapnp, id_table);
#endif
__setup("ncr5380=", do_NCR5380_setup);
__setup("ncr53c400=", do_NCR53C400_setup);
__setup("ncr53c400a=", do_NCR53C400A_setup);
__setup("dtc3181e=", do_DTC3181E_setup);
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