mirror of https://gitee.com/openkylin/linux.git
254 lines
9.2 KiB
C
254 lines
9.2 KiB
C
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/* $Id: icn.h,v 1.30.6.5 2001/09/23 22:24:55 kai Exp $
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*
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* ISDN lowlevel-module for the ICN active ISDN-Card.
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*
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* Copyright 1994 by Fritz Elfert (fritz@isdn4linux.de)
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#ifndef icn_h
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#define icn_h
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#define ICN_IOCTL_SETMMIO 0
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#define ICN_IOCTL_GETMMIO 1
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#define ICN_IOCTL_SETPORT 2
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#define ICN_IOCTL_GETPORT 3
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#define ICN_IOCTL_LOADBOOT 4
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#define ICN_IOCTL_LOADPROTO 5
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#define ICN_IOCTL_LEASEDCFG 6
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#define ICN_IOCTL_GETDOUBLE 7
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#define ICN_IOCTL_DEBUGVAR 8
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#define ICN_IOCTL_ADDCARD 9
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/* Struct for adding new cards */
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typedef struct icn_cdef {
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int port;
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char id1[10];
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char id2[10];
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} icn_cdef;
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#if defined(__KERNEL__) || defined(__DEBUGVAR__)
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#ifdef __KERNEL__
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/* Kernel includes */
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/major.h>
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#include <asm/io.h>
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#include <linux/kernel.h>
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#include <linux/signal.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/mman.h>
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#include <linux/ioport.h>
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#include <linux/timer.h>
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#include <linux/wait.h>
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#include <linux/delay.h>
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#include <linux/isdnif.h>
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#endif /* __KERNEL__ */
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/* some useful macros for debugging */
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#ifdef ICN_DEBUG_PORT
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#define OUTB_P(v,p) {printk(KERN_DEBUG "icn: outb_p(0x%02x,0x%03x)\n",v,p); outb_p(v,p);}
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#else
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#define OUTB_P outb
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#endif
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/* Defaults for Port-Address and shared-memory */
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#define ICN_BASEADDR 0x320
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#define ICN_PORTLEN (0x04)
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#define ICN_MEMADDR 0x0d0000
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#define ICN_FLAGS_B1ACTIVE 1 /* B-Channel-1 is open */
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#define ICN_FLAGS_B2ACTIVE 2 /* B-Channel-2 is open */
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#define ICN_FLAGS_RUNNING 4 /* Cards driver activated */
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#define ICN_FLAGS_RBTIMER 8 /* cyclic scheduling of B-Channel-poll */
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#define ICN_BOOT_TIMEOUT1 1000 /* Delay for Boot-download (msecs) */
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#define ICN_TIMER_BCREAD (HZ/100) /* B-Channel poll-cycle */
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#define ICN_TIMER_DCREAD (HZ/2) /* D-Channel poll-cycle */
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#define ICN_CODE_STAGE1 4096 /* Size of bootcode */
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#define ICN_CODE_STAGE2 65536 /* Size of protocol-code */
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#define ICN_MAX_SQUEUE 8000 /* Max. outstanding send-data (2* hw-buf.) */
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#define ICN_FRAGSIZE (250) /* Max. size of send-fragments */
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#define ICN_BCH 2 /* Number of supported channels per card */
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/* type-definitions for accessing the mmap-io-areas */
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#define SHM_DCTL_OFFSET (0) /* Offset to data-controlstructures in shm */
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#define SHM_CCTL_OFFSET (0x1d2) /* Offset to comm-controlstructures in shm */
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#define SHM_CBUF_OFFSET (0x200) /* Offset to comm-buffers in shm */
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#define SHM_DBUF_OFFSET (0x2000) /* Offset to data-buffers in shm */
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/*
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* Layout of card's data buffers
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*/
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typedef struct {
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unsigned char length; /* Bytecount of fragment (max 250) */
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unsigned char endflag; /* 0=last frag., 0xff=frag. continued */
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unsigned char data[ICN_FRAGSIZE]; /* The data */
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/* Fill to 256 bytes */
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char unused[0x100 - ICN_FRAGSIZE - 2];
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} frag_buf;
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/*
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* Layout of card's shared memory
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*/
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typedef union {
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struct {
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unsigned char scns; /* Index to free SendFrag. */
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unsigned char scnr; /* Index to active SendFrag READONLY */
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unsigned char ecns; /* Index to free RcvFrag. READONLY */
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unsigned char ecnr; /* Index to valid RcvFrag */
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char unused[6];
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unsigned short fuell1; /* Internal Buf Bytecount */
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} data_control;
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struct {
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char unused[SHM_CCTL_OFFSET];
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unsigned char iopc_i; /* Read-Ptr Status-Queue READONLY */
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unsigned char iopc_o; /* Write-Ptr Status-Queue */
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unsigned char pcio_i; /* Write-Ptr Command-Queue */
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unsigned char pcio_o; /* Read-Ptr Command Queue READONLY */
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} comm_control;
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struct {
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char unused[SHM_CBUF_OFFSET];
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unsigned char pcio_buf[0x100]; /* Ring-Buffer Command-Queue */
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unsigned char iopc_buf[0x100]; /* Ring-Buffer Status-Queue */
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} comm_buffers;
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struct {
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char unused[SHM_DBUF_OFFSET];
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frag_buf receive_buf[0x10];
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frag_buf send_buf[0x10];
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} data_buffers;
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} icn_shmem;
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/*
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* Per card driver data
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*/
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typedef struct icn_card {
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struct icn_card *next; /* Pointer to next device struct */
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struct icn_card *other; /* Pointer to other card for ICN4B */
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unsigned short port; /* Base-port-address */
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int myid; /* Driver-Nr. assigned by linklevel */
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int rvalid; /* IO-portregion has been requested */
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int leased; /* Flag: This Adapter is connected */
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/* to a leased line */
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unsigned short flags; /* Statusflags */
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int doubleS0; /* Flag: ICN4B */
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int secondhalf; /* Flag: Second half of a doubleS0 */
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int fw_rev; /* Firmware revision loaded */
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int ptype; /* Protocol type (1TR6 or Euro) */
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struct timer_list st_timer; /* Timer for Status-Polls */
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struct timer_list rb_timer; /* Timer for B-Channel-Polls */
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u_char rcvbuf[ICN_BCH][4096]; /* B-Channel-Receive-Buffers */
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int rcvidx[ICN_BCH]; /* Index for above buffers */
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int l2_proto[ICN_BCH]; /* Current layer-2-protocol */
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isdn_if interface; /* Interface to upper layer */
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int iptr; /* Index to imsg-buffer */
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char imsg[60]; /* Internal buf for status-parsing */
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char msg_buf[2048]; /* Buffer for status-messages */
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char *msg_buf_write; /* Writepointer for statusbuffer */
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char *msg_buf_read; /* Readpointer for statusbuffer */
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char *msg_buf_end; /* Pointer to end of statusbuffer */
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int sndcount[ICN_BCH]; /* Byte-counters for B-Ch.-send */
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int xlen[ICN_BCH]; /* Byte-counters/Flags for sent-ACK */
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struct sk_buff *xskb[ICN_BCH]; /* Current transmitted skb */
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struct sk_buff_head spqueue[ICN_BCH]; /* Sendqueue */
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char regname[35]; /* Name used for request_region */
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u_char xmit_lock[ICN_BCH]; /* Semaphore for pollbchan_send()*/
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spinlock_t lock; /* protect critical operations */
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} icn_card;
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/*
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* Main driver data
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*/
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typedef struct icn_dev {
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spinlock_t devlock; /* spinlock to protect this struct */
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unsigned long memaddr; /* Address of memory mapped buffers */
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icn_shmem __iomem *shmem; /* Pointer to memory-mapped-buffers */
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int mvalid; /* IO-shmem has been requested */
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int channel; /* Currently mapped channel */
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struct icn_card *mcard; /* Currently mapped card */
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int chanlock; /* Semaphore for channel-mapping */
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int firstload; /* Flag: firmware never loaded */
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} icn_dev;
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typedef icn_dev *icn_devptr;
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#ifdef __KERNEL__
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static icn_card *cards = (icn_card *) 0;
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static u_char chan2bank[] =
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{0, 4, 8, 12}; /* for icn_map_channel() */
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static icn_dev dev;
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#endif /* __KERNEL__ */
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/* Utility-Macros */
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/* Macros for accessing ports */
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#define ICN_CFG (card->port)
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#define ICN_MAPRAM (card->port+1)
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#define ICN_RUN (card->port+2)
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#define ICN_BANK (card->port+3)
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/* Return true, if there is a free transmit-buffer */
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#define sbfree (((readb(&dev.shmem->data_control.scns)+1) & 0xf) != \
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readb(&dev.shmem->data_control.scnr))
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/* Switch to next transmit-buffer */
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#define sbnext (writeb((readb(&dev.shmem->data_control.scns)+1) & 0xf, \
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&dev.shmem->data_control.scns))
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/* Shortcuts for transmit-buffer-access */
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#define sbuf_n dev.shmem->data_control.scns
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#define sbuf_d dev.shmem->data_buffers.send_buf[readb(&sbuf_n)].data
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#define sbuf_l dev.shmem->data_buffers.send_buf[readb(&sbuf_n)].length
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#define sbuf_f dev.shmem->data_buffers.send_buf[readb(&sbuf_n)].endflag
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/* Return true, if there is receive-data is available */
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#define rbavl (readb(&dev.shmem->data_control.ecnr) != \
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readb(&dev.shmem->data_control.ecns))
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/* Switch to next receive-buffer */
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#define rbnext (writeb((readb(&dev.shmem->data_control.ecnr)+1) & 0xf, \
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&dev.shmem->data_control.ecnr))
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/* Shortcuts for receive-buffer-access */
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#define rbuf_n dev.shmem->data_control.ecnr
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#define rbuf_d dev.shmem->data_buffers.receive_buf[readb(&rbuf_n)].data
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#define rbuf_l dev.shmem->data_buffers.receive_buf[readb(&rbuf_n)].length
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#define rbuf_f dev.shmem->data_buffers.receive_buf[readb(&rbuf_n)].endflag
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/* Shortcuts for command-buffer-access */
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#define cmd_o (dev.shmem->comm_control.pcio_o)
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#define cmd_i (dev.shmem->comm_control.pcio_i)
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/* Return free space in command-buffer */
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#define cmd_free ((readb(&cmd_i)>=readb(&cmd_o))? \
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0x100-readb(&cmd_i)+readb(&cmd_o): \
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readb(&cmd_o)-readb(&cmd_i))
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/* Shortcuts for message-buffer-access */
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#define msg_o (dev.shmem->comm_control.iopc_o)
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#define msg_i (dev.shmem->comm_control.iopc_i)
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/* Return length of Message, if avail. */
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#define msg_avail ((readb(&msg_o)>readb(&msg_i))? \
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0x100-readb(&msg_o)+readb(&msg_i): \
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readb(&msg_i)-readb(&msg_o))
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#define CID (card->interface.id)
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#endif /* defined(__KERNEL__) || defined(__DEBUGVAR__) */
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#endif /* icn_h */
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