drivers/isdn/icn/icn.h

   1 /* $Id: icn.h,v 1.30.6.5 2001/09/23 22:24:55 kai Exp $
   2  *
   3  * ISDN lowlevel-module for the ICN active ISDN-Card.
   4  *
   5  * Copyright 1994 by Fritz Elfert (fritz@isdn4linux.de)
   6  *
   7  * This software may be used and distributed according to the terms
   8  * of the GNU General Public License, incorporated herein by reference.
   9  *
  10  */
  11
  12 #ifndef icn_h
  13 #define icn_h
  14
  15 #define ICN_IOCTL_SETMMIO   0
  16 #define ICN_IOCTL_GETMMIO   1
  17 #define ICN_IOCTL_SETPORT   2
  18 #define ICN_IOCTL_GETPORT   3
  19 #define ICN_IOCTL_LOADBOOT  4
  20 #define ICN_IOCTL_LOADPROTO 5
  21 #define ICN_IOCTL_LEASEDCFG 6
  22 #define ICN_IOCTL_GETDOUBLE 7
  23 #define ICN_IOCTL_DEBUGVAR  8
  24 #define ICN_IOCTL_ADDCARD   9
  25
  26 /* Struct for adding new cards */
  27 typedef struct icn_cdef {
  28         int port;
  29         char id1[10];
  30         char id2[10];
  31 } icn_cdef;
  32
  33 #if defined(__KERNEL__) || defined(__DEBUGVAR__)
  34
  35 #ifdef __KERNEL__
  36 /* Kernel includes */
  37
  38 #include <linux/errno.h>
  39 #include <linux/fs.h>
  40 #include <linux/major.h>
  41 #include <asm/io.h>
  42 #include <linux/kernel.h>
  43 #include <linux/signal.h>
  44 #include <linux/slab.h>
  45 #include <linux/mm.h>
  46 #include <linux/mman.h>
  47 #include <linux/ioport.h>
  48 #include <linux/timer.h>
  49 #include <linux/wait.h>
  50 #include <linux/delay.h>
  51 #include <linux/isdnif.h>
  52
  53 #endif                          /* __KERNEL__ */
  54
  55 /* some useful macros for debugging */
  56 #ifdef ICN_DEBUG_PORT
  57 #define OUTB_P(v, p) {printk(KERN_DEBUG "icn: outb_p(0x%02x,0x%03x)\n", v, p); outb_p(v, p);}
  58 #else
  59 #define OUTB_P outb
  60 #endif
  61
  62 /* Defaults for Port-Address and shared-memory */
  63 #define ICN_BASEADDR 0x320
  64 #define ICN_PORTLEN (0x04)
  65 #define ICN_MEMADDR 0x0d0000
  66
  67 #define ICN_FLAGS_B1ACTIVE 1    /* B-Channel-1 is open                     */
  68 #define ICN_FLAGS_B2ACTIVE 2    /* B-Channel-2 is open                     */
  69 #define ICN_FLAGS_RUNNING  4    /* Cards driver activated                  */
  70 #define ICN_FLAGS_RBTIMER  8    /* cyclic scheduling of B-Channel-poll     */
  71
  72 #define ICN_BOOT_TIMEOUT1  1000 /* Delay for Boot-download (msecs)         */
  73
  74 #define ICN_TIMER_BCREAD (HZ / 100)     /* B-Channel poll-cycle                    */
  75 #define ICN_TIMER_DCREAD (HZ / 2) /* D-Channel poll-cycle                    */
  76
  77 #define ICN_CODE_STAGE1 4096    /* Size of bootcode                        */
  78 #define ICN_CODE_STAGE2 65536   /* Size of protocol-code                   */
  79
  80 #define ICN_MAX_SQUEUE 8000     /* Max. outstanding send-data (2* hw-buf.) */
  81 #define ICN_FRAGSIZE (250)      /* Max. size of send-fragments             */
  82 #define ICN_BCH 2               /* Number of supported channels per card   */
  83
  84 /* type-definitions for accessing the mmap-io-areas */
  85
  86 #define SHM_DCTL_OFFSET (0)     /* Offset to data-controlstructures in shm */
  87 #define SHM_CCTL_OFFSET (0x1d2) /* Offset to comm-controlstructures in shm */
  88 #define SHM_CBUF_OFFSET (0x200) /* Offset to comm-buffers in shm           */
  89 #define SHM_DBUF_OFFSET (0x2000)        /* Offset to data-buffers in shm           */
  90
  91 /*
  92  * Layout of card's data buffers
  93  */
  94 typedef struct {
  95         unsigned char length;   /* Bytecount of fragment (max 250)    */
  96         unsigned char endflag;  /* 0=last frag., 0xff=frag. continued */
  97         unsigned char data[ICN_FRAGSIZE];       /* The data                           */
  98         /* Fill to 256 bytes */
  99         char unused[0x100 - ICN_FRAGSIZE - 2];
 100 } frag_buf;
 101
 102 /*
 103  * Layout of card's shared memory
 104  */
 105 typedef union {
 106         struct {
 107                 unsigned char scns;     /* Index to free SendFrag.             */
 108                 unsigned char scnr;     /* Index to active SendFrag   READONLY */
 109                 unsigned char ecns;     /* Index to free RcvFrag.     READONLY */
 110                 unsigned char ecnr;     /* Index to valid RcvFrag              */
 111                 char unused[6];
 112                 unsigned short fuell1;  /* Internal Buf Bytecount              */
 113         } data_control;
 114         struct {
 115                 char unused[SHM_CCTL_OFFSET];
 116                 unsigned char iopc_i;   /* Read-Ptr Status-Queue      READONLY */
 117                 unsigned char iopc_o;   /* Write-Ptr Status-Queue              */
 118                 unsigned char pcio_i;   /* Write-Ptr Command-Queue             */
 119                 unsigned char pcio_o;   /* Read-Ptr Command Queue     READONLY */
 120         } comm_control;
 121         struct {
 122                 char unused[SHM_CBUF_OFFSET];
 123                 unsigned char pcio_buf[0x100];  /* Ring-Buffer Command-Queue           */
 124                 unsigned char iopc_buf[0x100];  /* Ring-Buffer Status-Queue            */
 125         } comm_buffers;
 126         struct {
 127                 char unused[SHM_DBUF_OFFSET];
 128                 frag_buf receive_buf[0x10];
 129                 frag_buf send_buf[0x10];
 130         } data_buffers;
 131 } icn_shmem;
 132
 133 /*
 134  * Per card driver data
 135  */
 136 typedef struct icn_card {
 137         struct icn_card *next;  /* Pointer to next device struct    */
 138         struct icn_card *other; /* Pointer to other card for ICN4B  */
 139         unsigned short port;    /* Base-port-address                */
 140         int myid;               /* Driver-Nr. assigned by linklevel */
 141         int rvalid;             /* IO-portregion has been requested */
 142         int leased;             /* Flag: This Adapter is connected  */
 143                                 /*       to a leased line           */
 144         unsigned short flags;   /* Statusflags                      */
 145         int doubleS0;           /* Flag: ICN4B                      */
 146         int secondhalf;         /* Flag: Second half of a doubleS0  */
 147         int fw_rev;             /* Firmware revision loaded         */
 148         int ptype;              /* Protocol type (1TR6 or Euro)     */
 149         struct timer_list st_timer;   /* Timer for Status-Polls     */
 150         struct timer_list rb_timer;   /* Timer for B-Channel-Polls  */
 151         u_char rcvbuf[ICN_BCH][4096]; /* B-Channel-Receive-Buffers  */
 152         int rcvidx[ICN_BCH];    /* Index for above buffers          */
 153         int l2_proto[ICN_BCH];  /* Current layer-2-protocol         */
 154         isdn_if interface;      /* Interface to upper layer         */
 155         int iptr;               /* Index to imsg-buffer             */
 156         char imsg[60];          /* Internal buf for status-parsing  */
 157         char msg_buf[2048];     /* Buffer for status-messages       */
 158         char *msg_buf_write;    /* Writepointer for statusbuffer    */
 159         char *msg_buf_read;     /* Readpointer for statusbuffer     */
 160         char *msg_buf_end;      /* Pointer to end of statusbuffer   */
 161         int sndcount[ICN_BCH];  /* Byte-counters for B-Ch.-send     */
 162         int xlen[ICN_BCH];      /* Byte-counters/Flags for sent-ACK */
 163         struct sk_buff *xskb[ICN_BCH]; /* Current transmitted skb   */
 164         struct sk_buff_head spqueue[ICN_BCH];  /* Sendqueue         */
 165         char regname[35];       /* Name used for request_region     */
 166         u_char xmit_lock[ICN_BCH]; /* Semaphore for pollbchan_send()*/
 167         spinlock_t lock;        /* protect critical operations      */
 168 } icn_card;
 169
 170 /*
 171  * Main driver data
 172  */
 173 typedef struct icn_dev {
 174         spinlock_t devlock;     /* spinlock to protect this struct  */
 175         unsigned long memaddr;  /* Address of memory mapped buffers */
 176         icn_shmem __iomem *shmem;       /* Pointer to memory-mapped-buffers */
 177         int mvalid;             /* IO-shmem has been requested      */
 178         int channel;            /* Currently mapped channel         */
 179         struct icn_card *mcard; /* Currently mapped card            */
 180         int chanlock;           /* Semaphore for channel-mapping    */
 181         int firstload;          /* Flag: firmware never loaded      */
 182 } icn_dev;
 183
 184 typedef icn_dev *icn_devptr;
 185
 186 #ifdef __KERNEL__
 187
 188 static icn_card *cards = (icn_card *) 0;
 189 static u_char chan2bank[] =
 190 {0, 4, 8, 12};                  /* for icn_map_channel() */
 191
 192 static icn_dev dev;
 193
 194 #endif                          /* __KERNEL__ */
 195
 196 /* Utility-Macros */
 197
 198 /* Macros for accessing ports */
 199 #define ICN_CFG    (card->port)
 200 #define ICN_MAPRAM (card->port + 1)
 201 #define ICN_RUN    (card->port + 2)
 202 #define ICN_BANK   (card->port + 3)
 203
 204 /* Return true, if there is a free transmit-buffer */
 205 #define sbfree (((readb(&dev.shmem->data_control.scns) + 1) & 0xf) !=   \
 206                 readb(&dev.shmem->data_control.scnr))
 207
 208 /* Switch to next transmit-buffer */
 209 #define sbnext (writeb((readb(&dev.shmem->data_control.scns) + 1) & 0xf,        \
 210                        &dev.shmem->data_control.scns))
 211
 212 /* Shortcuts for transmit-buffer-access */
 213 #define sbuf_n dev.shmem->data_control.scns
 214 #define sbuf_d dev.shmem->data_buffers.send_buf[readb(&sbuf_n)].data
 215 #define sbuf_l dev.shmem->data_buffers.send_buf[readb(&sbuf_n)].length
 216 #define sbuf_f dev.shmem->data_buffers.send_buf[readb(&sbuf_n)].endflag
 217
 218 /* Return true, if there is receive-data is available */
 219 #define rbavl  (readb(&dev.shmem->data_control.ecnr) != \
 220                 readb(&dev.shmem->data_control.ecns))
 221
 222 /* Switch to next receive-buffer */
 223 #define rbnext (writeb((readb(&dev.shmem->data_control.ecnr) + 1) & 0xf,        \
 224                        &dev.shmem->data_control.ecnr))
 225
 226 /* Shortcuts for receive-buffer-access */
 227 #define rbuf_n dev.shmem->data_control.ecnr
 228 #define rbuf_d dev.shmem->data_buffers.receive_buf[readb(&rbuf_n)].data
 229 #define rbuf_l dev.shmem->data_buffers.receive_buf[readb(&rbuf_n)].length
 230 #define rbuf_f dev.shmem->data_buffers.receive_buf[readb(&rbuf_n)].endflag
 231
 232 /* Shortcuts for command-buffer-access */
 233 #define cmd_o (dev.shmem->comm_control.pcio_o)
 234 #define cmd_i (dev.shmem->comm_control.pcio_i)
 235
 236 /* Return free space in command-buffer */
 237 #define cmd_free ((readb(&cmd_i) >= readb(&cmd_o)) ?            \
 238                   0x100 - readb(&cmd_i) + readb(&cmd_o) :       \
 239                   readb(&cmd_o) - readb(&cmd_i))
 240
 241 /* Shortcuts for message-buffer-access */
 242 #define msg_o (dev.shmem->comm_control.iopc_o)
 243 #define msg_i (dev.shmem->comm_control.iopc_i)
 244
 245 /* Return length of Message, if avail. */
 246 #define msg_avail ((readb(&msg_o) > readb(&msg_i)) ?            \
 247                    0x100 - readb(&msg_o) + readb(&msg_i) :      \
 248                    readb(&msg_i) - readb(&msg_o))
 249
 250 #define CID (card->interface.id)
 251
 252 #endif                          /* defined(__KERNEL__) || defined(__DEBUGVAR__) */
 253 #endif                          /* icn_h */