drivers/isdn/act2000/act2000_isa.c

   1 /* $Id: act2000_isa.c,v 1.11.6.3 2001/09/23 22:24:32 kai Exp $
   2  *
   3  * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000 (ISA-Version).
   4  *
   5  * Author       Fritz Elfert
   6  * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  *
  11  * Thanks to Friedemann Baitinger and IBM Germany
  12  *
  13  */
  14
  15 #include "act2000.h"
  16 #include "act2000_isa.h"
  17 #include "capi.h"
  18
  19 static act2000_card *irq2card_map[16];
  20
  21 static void
  22 act2000_isa_delay(long t)
  23 {
  24         set_current_state(TASK_INTERRUPTIBLE);
  25         schedule_timeout(t);
  26 }
  27
  28 /*
  29  * Reset Controller, then try to read the Card's signature.
  30  + Return:
  31  *   1 = Signature found.
  32  *   0 = Signature not found.
  33  */
  34 static int
  35 act2000_isa_reset(unsigned short portbase)
  36 {
  37         unsigned char reg;
  38         int i;
  39         int found;
  40         int serial = 0;
  41
  42         found = 0;
  43         if ((reg = inb(portbase + ISA_COR)) != 0xff) {
  44                 outb(reg | ISA_COR_RESET, portbase + ISA_COR);
  45                 mdelay(10);
  46                 outb(reg, portbase + ISA_COR);
  47                 mdelay(10);
  48
  49                 for (i = 0; i < 16; i++) {
  50                         if (inb(portbase + ISA_ISR) & ISA_ISR_SERIAL)
  51                                 serial |= 0x10000;
  52                         serial >>= 1;
  53                 }
  54                 if (serial == ISA_SER_ID)
  55                         found++;
  56         }
  57         return found;
  58 }
  59
  60 int
  61 act2000_isa_detect(unsigned short portbase)
  62 {
  63         int ret = 0;
  64
  65         if (request_region(portbase, ACT2000_PORTLEN, "act2000isa")) {
  66                 ret = act2000_isa_reset(portbase);
  67                 release_region(portbase, ISA_REGION);
  68         }
  69         return ret;
  70 }
  71
  72 static irqreturn_t
  73 act2000_isa_interrupt(int irq, void *dev_id, struct pt_regs *regs)
  74 {
  75         act2000_card *card = irq2card_map[irq];
  76         u_char istatus;
  77
  78         if (!card) {
  79                 printk(KERN_WARNING
  80                        "act2000: Spurious interrupt!\n");
  81                 return IRQ_NONE;
  82         }
  83         istatus = (inb(ISA_PORT_ISR) & 0x07);
  84         if (istatus & ISA_ISR_OUT) {
  85                 /* RX fifo has data */
  86                 istatus &= ISA_ISR_OUT_MASK;
  87                 outb(0, ISA_PORT_SIS);
  88                 act2000_isa_receive(card);
  89                 outb(ISA_SIS_INT, ISA_PORT_SIS);
  90         }
  91         if (istatus & ISA_ISR_ERR) {
  92                 /* Error Interrupt */
  93                 istatus &= ISA_ISR_ERR_MASK;
  94                 printk(KERN_WARNING "act2000: errIRQ\n");
  95         }
  96         if (istatus)
  97                 printk(KERN_DEBUG "act2000: ?IRQ %d %02x\n", irq, istatus);
  98         return IRQ_HANDLED;
  99 }
 100
 101 static void
 102 act2000_isa_select_irq(act2000_card * card)
 103 {
 104         unsigned char reg;
 105
 106         reg = (inb(ISA_PORT_COR) & ~ISA_COR_IRQOFF) | ISA_COR_PERR;
 107         switch (card->irq) {
 108                 case 3:
 109                         reg = ISA_COR_IRQ03;
 110                         break;
 111                 case 5:
 112                         reg = ISA_COR_IRQ05;
 113                         break;
 114                 case 7:
 115                         reg = ISA_COR_IRQ07;
 116                         break;
 117                 case 10:
 118                         reg = ISA_COR_IRQ10;
 119                         break;
 120                 case 11:
 121                         reg = ISA_COR_IRQ11;
 122                         break;
 123                 case 12:
 124                         reg = ISA_COR_IRQ12;
 125                         break;
 126                 case 15:
 127                         reg = ISA_COR_IRQ15;
 128                         break;
 129         }
 130         outb(reg, ISA_PORT_COR);
 131 }
 132
 133 static void
 134 act2000_isa_enable_irq(act2000_card * card)
 135 {
 136         act2000_isa_select_irq(card);
 137         /* Enable READ irq */
 138         outb(ISA_SIS_INT, ISA_PORT_SIS);
 139 }
 140
 141 /*
 142  * Install interrupt handler, enable irq on card.
 143  * If irq is -1, choose next free irq, else irq is given explicitely.
 144  */
 145 int
 146 act2000_isa_config_irq(act2000_card * card, short irq)
 147 {
 148         if (card->flags & ACT2000_FLAGS_IVALID) {
 149                 free_irq(card->irq, NULL);
 150                 irq2card_map[card->irq] = NULL;
 151         }
 152         card->flags &= ~ACT2000_FLAGS_IVALID;
 153         outb(ISA_COR_IRQOFF, ISA_PORT_COR);
 154         if (!irq)
 155                 return 0;
 156
 157         if (!request_irq(irq, &act2000_isa_interrupt, 0, card->regname, NULL)) {
 158                 card->irq = irq;
 159                 irq2card_map[card->irq] = card;
 160                 card->flags |= ACT2000_FLAGS_IVALID;
 161                 printk(KERN_WARNING
 162                        "act2000: Could not request irq %d\n",irq);
 163                 return -EBUSY;
 164         } else {
 165                 act2000_isa_select_irq(card);
 166                 /* Disable READ and WRITE irq */
 167                 outb(0, ISA_PORT_SIS);
 168                 outb(0, ISA_PORT_SOS);
 169         }
 170         return 0;
 171 }
 172
 173 int
 174 act2000_isa_config_port(act2000_card * card, unsigned short portbase)
 175 {
 176         if (card->flags & ACT2000_FLAGS_PVALID) {
 177                 release_region(card->port, ISA_REGION);
 178                 card->flags &= ~ACT2000_FLAGS_PVALID;
 179         }
 180         if (request_region(portbase, ACT2000_PORTLEN, card->regname) == NULL)
 181                 return -EBUSY;
 182         else {
 183                 card->port = portbase;
 184                 card->flags |= ACT2000_FLAGS_PVALID;
 185                 return 0;
 186         }
 187 }
 188
 189 /*
 190  * Release ressources, used by an adaptor.
 191  */
 192 void
 193 act2000_isa_release(act2000_card * card)
 194 {
 195         unsigned long flags;
 196
 197         spin_lock_irqsave(&card->lock, flags);
 198         if (card->flags & ACT2000_FLAGS_IVALID) {
 199                 free_irq(card->irq, NULL);
 200                 irq2card_map[card->irq] = NULL;
 201         }
 202         card->flags &= ~ACT2000_FLAGS_IVALID;
 203         if (card->flags & ACT2000_FLAGS_PVALID)
 204                 release_region(card->port, ISA_REGION);
 205         card->flags &= ~ACT2000_FLAGS_PVALID;
 206         spin_unlock_irqrestore(&card->lock, flags);
 207 }
 208
 209 static int
 210 act2000_isa_writeb(act2000_card * card, u_char data)
 211 {
 212         u_char timeout = 40;
 213
 214         while (timeout) {
 215                 if (inb(ISA_PORT_SOS) & ISA_SOS_READY) {
 216                         outb(data, ISA_PORT_SDO);
 217                         return 0;
 218                 } else {
 219                         timeout--;
 220                         udelay(10);
 221                 }
 222         }
 223         return 1;
 224 }
 225
 226 static int
 227 act2000_isa_readb(act2000_card * card, u_char * data)
 228 {
 229         u_char timeout = 40;
 230
 231         while (timeout) {
 232                 if (inb(ISA_PORT_SIS) & ISA_SIS_READY) {
 233                         *data = inb(ISA_PORT_SDI);
 234                         return 0;
 235                 } else {
 236                         timeout--;
 237                         udelay(10);
 238                 }
 239         }
 240         return 1;
 241 }
 242
 243 void
 244 act2000_isa_receive(act2000_card *card)
 245 {
 246         u_char c;
 247
 248         if (test_and_set_bit(ACT2000_LOCK_RX, (void *) &card->ilock) != 0)
 249                 return;
 250         while (!act2000_isa_readb(card, &c)) {
 251                 if (card->idat.isa.rcvidx < 8) {
 252                         card->idat.isa.rcvhdr[card->idat.isa.rcvidx++] = c;
 253                         if (card->idat.isa.rcvidx == 8) {
 254                                 int valid = actcapi_chkhdr(card, (actcapi_msghdr *)&card->idat.isa.rcvhdr);
 255
 256                                 if (valid) {
 257                                         card->idat.isa.rcvlen = ((actcapi_msghdr *)&card->idat.isa.rcvhdr)->len;
 258                                         card->idat.isa.rcvskb = dev_alloc_skb(card->idat.isa.rcvlen);
 259                                         if (card->idat.isa.rcvskb == NULL) {
 260                                                 card->idat.isa.rcvignore = 1;
 261                                                 printk(KERN_WARNING
 262                                                        "act2000_isa_receive: no memory\n");
 263                                                 test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
 264                                                 return;
 265                                         }
 266                                         memcpy(skb_put(card->idat.isa.rcvskb, 8), card->idat.isa.rcvhdr, 8);
 267                                         card->idat.isa.rcvptr = skb_put(card->idat.isa.rcvskb, card->idat.isa.rcvlen - 8);
 268                                 } else {
 269                                         card->idat.isa.rcvidx = 0;
 270                                         printk(KERN_WARNING
 271                                                "act2000_isa_receive: Invalid CAPI msg\n");
 272                                         {
 273                                                 int i; __u8 *p; __u8 *c; __u8 tmp[30];
 274                                                 for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, c = tmp; i < 8; i++)
 275                                                         c += sprintf(c, "%02x ", *(p++));
 276                                                 printk(KERN_WARNING "act2000_isa_receive: %s\n", tmp);
 277                                         }
 278                                 }
 279                         }
 280                 } else {
 281                         if (!card->idat.isa.rcvignore)
 282                                 *card->idat.isa.rcvptr++ = c;
 283                         if (++card->idat.isa.rcvidx >= card->idat.isa.rcvlen) {
 284                                 if (!card->idat.isa.rcvignore) {
 285                                         skb_queue_tail(&card->rcvq, card->idat.isa.rcvskb);
 286                                         act2000_schedule_rx(card);
 287                                 }
 288                                 card->idat.isa.rcvidx = 0;
 289                                 card->idat.isa.rcvlen = 8;
 290                                 card->idat.isa.rcvignore = 0;
 291                                 card->idat.isa.rcvskb = NULL;
 292                                 card->idat.isa.rcvptr = card->idat.isa.rcvhdr;
 293                         }
 294                 }
 295         }
 296         if (!(card->flags & ACT2000_FLAGS_IVALID)) {
 297                 /* In polling mode, schedule myself */
 298                 if ((card->idat.isa.rcvidx) &&
 299                     (card->idat.isa.rcvignore ||
 300                      (card->idat.isa.rcvidx < card->idat.isa.rcvlen)))
 301                         act2000_schedule_poll(card);
 302         }
 303         test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
 304 }
 305
 306 void
 307 act2000_isa_send(act2000_card * card)
 308 {
 309         unsigned long flags;
 310         struct sk_buff *skb;
 311         actcapi_msg *msg;
 312         int l;
 313
 314         if (test_and_set_bit(ACT2000_LOCK_TX, (void *) &card->ilock) != 0)
 315                 return;
 316         while (1) {
 317                 spin_lock_irqsave(&card->lock, flags);
 318                 if (!(card->sbuf)) {
 319                         if ((card->sbuf = skb_dequeue(&card->sndq))) {
 320                                 card->ack_msg = card->sbuf->data;
 321                                 msg = (actcapi_msg *)card->sbuf->data;
 322                                 if ((msg->hdr.cmd.cmd == 0x86) &&
 323                                     (msg->hdr.cmd.subcmd == 0)   ) {
 324                                         /* Save flags in message */
 325                                         card->need_b3ack = msg->msg.data_b3_req.flags;
 326                                         msg->msg.data_b3_req.flags = 0;
 327                                 }
 328                         }
 329                 }
 330                 spin_unlock_irqrestore(&card->lock, flags);
 331                 if (!(card->sbuf)) {
 332                         /* No more data to send */
 333                         test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
 334                         return;
 335                 }
 336                 skb = card->sbuf;
 337                 l = 0;
 338                 while (skb->len) {
 339                         if (act2000_isa_writeb(card, *(skb->data))) {
 340                                 /* Fifo is full, but more data to send */
 341                                 test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
 342                                 /* Schedule myself */
 343                                 act2000_schedule_tx(card);
 344                                 return;
 345                         }
 346                         skb_pull(skb, 1);
 347                         l++;
 348                 }
 349                 msg = (actcapi_msg *)card->ack_msg;
 350                 if ((msg->hdr.cmd.cmd == 0x86) &&
 351                     (msg->hdr.cmd.subcmd == 0)   ) {
 352                         /*
 353                          * If it's user data, reset data-ptr
 354                          * and put skb into ackq.
 355                          */
 356                         skb->data = card->ack_msg;
 357                         /* Restore flags in message */
 358                         msg->msg.data_b3_req.flags = card->need_b3ack;
 359                         skb_queue_tail(&card->ackq, skb);
 360                 } else
 361                         dev_kfree_skb(skb);
 362                 card->sbuf = NULL;
 363         }
 364 }
 365
 366 /*
 367  * Get firmware ID, check for 'ISDN' signature.
 368  */
 369 static int
 370 act2000_isa_getid(act2000_card * card)
 371 {
 372
 373         act2000_fwid fid;
 374         u_char *p = (u_char *) & fid;
 375         int count = 0;
 376
 377         while (1) {
 378                 if (count > 510)
 379                         return -EPROTO;
 380                 if (act2000_isa_readb(card, p++))
 381                         break;
 382                 count++;
 383         }
 384         if (count <= 20) {
 385                 printk(KERN_WARNING "act2000: No Firmware-ID!\n");
 386                 return -ETIME;
 387         }
 388         *p = '\0';
 389         fid.revlen[0] = '\0';
 390         if (strcmp(fid.isdn, "ISDN")) {
 391                 printk(KERN_WARNING "act2000: Wrong Firmware-ID!\n");
 392                 return -EPROTO;
 393         }
 394         if ((p = strchr(fid.revision, '\n')))
 395                 *p = '\0';
 396         printk(KERN_INFO "act2000: Firmware-ID: %s\n", fid.revision);
 397         if (card->flags & ACT2000_FLAGS_IVALID) {
 398                 printk(KERN_DEBUG "Enabling Interrupts ...\n");
 399                 act2000_isa_enable_irq(card);
 400         }
 401         return 0;
 402 }
 403
 404 /*
 405  * Download microcode into card, check Firmware signature.
 406  */
 407 int
 408 act2000_isa_download(act2000_card * card, act2000_ddef * cb)
 409 {
 410         unsigned int length;
 411         int ret;
 412         int l;
 413         int c;
 414         long timeout;
 415         u_char *b;
 416         u_char *p;
 417         u_char *buf;
 418         act2000_ddef cblock;
 419
 420         if (!act2000_isa_reset(card->port))
 421                 return -ENXIO;
 422         act2000_isa_delay(HZ / 2);
 423         if(copy_from_user(&cblock, (char *) cb, sizeof(cblock)))
 424                 return -EFAULT;
 425         length = cblock.length;
 426         p = cblock.buffer;
 427         if ((ret = verify_area(VERIFY_READ, (void *) p, length)))
 428                 return ret;
 429         buf = (u_char *) kmalloc(1024, GFP_KERNEL);
 430         if (!buf)
 431                 return -ENOMEM;
 432         timeout = 0;
 433         while (length) {
 434                 l = (length > 1024) ? 1024 : length;
 435                 c = 0;
 436                 b = buf;
 437                 copy_from_user(buf, p, l);
 438                 while (c < l) {
 439                         if (act2000_isa_writeb(card, *b++)) {
 440                                 printk(KERN_WARNING
 441                                        "act2000: loader timed out"
 442                                        " len=%d c=%d\n", length, c);
 443                                 kfree(buf);
 444                                 return -ETIME;
 445                         }
 446                         c++;
 447                 }
 448                 length -= l;
 449                 p += l;
 450         }
 451         kfree(buf);
 452         act2000_isa_delay(HZ / 2);
 453         return (act2000_isa_getid(card));
 454 }