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 /*
  20  * Reset Controller, then try to read the Card's signature.
  21  + Return:
  22  *   1 = Signature found.
  23  *   0 = Signature not found.
  24  */
  25 static int
  26 act2000_isa_reset(unsigned short portbase)
  27 {
  28         unsigned char reg;
  29         int i;
  30         int found;
  31         int serial = 0;
  32
  33         found = 0;
  34         if ((reg = inb(portbase + ISA_COR)) != 0xff) {
  35                 outb(reg | ISA_COR_RESET, portbase + ISA_COR);
  36                 mdelay(10);
  37                 outb(reg, portbase + ISA_COR);
  38                 mdelay(10);
  39
  40                 for (i = 0; i < 16; i++) {
  41                         if (inb(portbase + ISA_ISR) & ISA_ISR_SERIAL)
  42                                 serial |= 0x10000;
  43                         serial >>= 1;
  44                 }
  45                 if (serial == ISA_SER_ID)
  46                         found++;
  47         }
  48         return found;
  49 }
  50
  51 int
  52 act2000_isa_detect(unsigned short portbase)
  53 {
  54         int ret = 0;
  55
  56         if (request_region(portbase, ACT2000_PORTLEN, "act2000isa")) {
  57                 ret = act2000_isa_reset(portbase);
  58                 release_region(portbase, ISA_REGION);
  59         }
  60         return ret;
  61 }
  62
  63 static irqreturn_t
  64 act2000_isa_interrupt(int dummy, void *dev_id)
  65 {
  66         act2000_card *card = dev_id;
  67         u_char istatus;
  68
  69         istatus = (inb(ISA_PORT_ISR) & 0x07);
  70         if (istatus & ISA_ISR_OUT) {
  71                 /* RX fifo has data */
  72                 istatus &= ISA_ISR_OUT_MASK;
  73                 outb(0, ISA_PORT_SIS);
  74                 act2000_isa_receive(card);
  75                 outb(ISA_SIS_INT, ISA_PORT_SIS);
  76         }
  77         if (istatus & ISA_ISR_ERR) {
  78                 /* Error Interrupt */
  79                 istatus &= ISA_ISR_ERR_MASK;
  80                 printk(KERN_WARNING "act2000: errIRQ\n");
  81         }
  82         if (istatus)
  83                 printk(KERN_DEBUG "act2000: ?IRQ %d %02x\n", card->irq, istatus);
  84         return IRQ_HANDLED;
  85 }
  86
  87 static void
  88 act2000_isa_select_irq(act2000_card *card)
  89 {
  90         unsigned char reg;
  91
  92         reg = (inb(ISA_PORT_COR) & ~ISA_COR_IRQOFF) | ISA_COR_PERR;
  93         switch (card->irq) {
  94         case 3:
  95                 reg = ISA_COR_IRQ03;
  96                 break;
  97         case 5:
  98                 reg = ISA_COR_IRQ05;
  99                 break;
 100         case 7:
 101                 reg = ISA_COR_IRQ07;
 102                 break;
 103         case 10:
 104                 reg = ISA_COR_IRQ10;
 105                 break;
 106         case 11:
 107                 reg = ISA_COR_IRQ11;
 108                 break;
 109         case 12:
 110                 reg = ISA_COR_IRQ12;
 111                 break;
 112         case 15:
 113                 reg = ISA_COR_IRQ15;
 114                 break;
 115         }
 116         outb(reg, ISA_PORT_COR);
 117 }
 118
 119 static void
 120 act2000_isa_enable_irq(act2000_card *card)
 121 {
 122         act2000_isa_select_irq(card);
 123         /* Enable READ irq */
 124         outb(ISA_SIS_INT, ISA_PORT_SIS);
 125 }
 126
 127 /*
 128  * Install interrupt handler, enable irq on card.
 129  * If irq is -1, choose next free irq, else irq is given explicitly.
 130  */
 131 int
 132 act2000_isa_config_irq(act2000_card *card, short irq)
 133 {
 134         int old_irq;
 135
 136         if (card->flags & ACT2000_FLAGS_IVALID) {
 137                 free_irq(card->irq, card);
 138         }
 139         card->flags &= ~ACT2000_FLAGS_IVALID;
 140         outb(ISA_COR_IRQOFF, ISA_PORT_COR);
 141         if (!irq)
 142                 return 0;
 143
 144         old_irq = card->irq;
 145         card->irq = irq;
 146         if (request_irq(irq, &act2000_isa_interrupt, 0, card->regname, card)) {
 147                 card->irq = old_irq;
 148                 card->flags |= ACT2000_FLAGS_IVALID;
 149                 printk(KERN_WARNING
 150                        "act2000: Could not request irq %d\n", irq);
 151                 return -EBUSY;
 152         } else {
 153                 act2000_isa_select_irq(card);
 154                 /* Disable READ and WRITE irq */
 155                 outb(0, ISA_PORT_SIS);
 156                 outb(0, ISA_PORT_SOS);
 157         }
 158         return 0;
 159 }
 160
 161 int
 162 act2000_isa_config_port(act2000_card *card, unsigned short portbase)
 163 {
 164         if (card->flags & ACT2000_FLAGS_PVALID) {
 165                 release_region(card->port, ISA_REGION);
 166                 card->flags &= ~ACT2000_FLAGS_PVALID;
 167         }
 168         if (request_region(portbase, ACT2000_PORTLEN, card->regname) == NULL)
 169                 return -EBUSY;
 170         else {
 171                 card->port = portbase;
 172                 card->flags |= ACT2000_FLAGS_PVALID;
 173                 return 0;
 174         }
 175 }
 176
 177 /*
 178  * Release ressources, used by an adaptor.
 179  */
 180 void
 181 act2000_isa_release(act2000_card *card)
 182 {
 183         unsigned long flags;
 184
 185         spin_lock_irqsave(&card->lock, flags);
 186         if (card->flags & ACT2000_FLAGS_IVALID)
 187                 free_irq(card->irq, card);
 188
 189         card->flags &= ~ACT2000_FLAGS_IVALID;
 190         if (card->flags & ACT2000_FLAGS_PVALID)
 191                 release_region(card->port, ISA_REGION);
 192         card->flags &= ~ACT2000_FLAGS_PVALID;
 193         spin_unlock_irqrestore(&card->lock, flags);
 194 }
 195
 196 static int
 197 act2000_isa_writeb(act2000_card *card, u_char data)
 198 {
 199         u_char timeout = 40;
 200
 201         while (timeout) {
 202                 if (inb(ISA_PORT_SOS) & ISA_SOS_READY) {
 203                         outb(data, ISA_PORT_SDO);
 204                         return 0;
 205                 } else {
 206                         timeout--;
 207                         udelay(10);
 208                 }
 209         }
 210         return 1;
 211 }
 212
 213 static int
 214 act2000_isa_readb(act2000_card *card, u_char *data)
 215 {
 216         u_char timeout = 40;
 217
 218         while (timeout) {
 219                 if (inb(ISA_PORT_SIS) & ISA_SIS_READY) {
 220                         *data = inb(ISA_PORT_SDI);
 221                         return 0;
 222                 } else {
 223                         timeout--;
 224                         udelay(10);
 225                 }
 226         }
 227         return 1;
 228 }
 229
 230 void
 231 act2000_isa_receive(act2000_card *card)
 232 {
 233         u_char c;
 234
 235         if (test_and_set_bit(ACT2000_LOCK_RX, (void *) &card->ilock) != 0)
 236                 return;
 237         while (!act2000_isa_readb(card, &c)) {
 238                 if (card->idat.isa.rcvidx < 8) {
 239                         card->idat.isa.rcvhdr[card->idat.isa.rcvidx++] = c;
 240                         if (card->idat.isa.rcvidx == 8) {
 241                                 int valid = actcapi_chkhdr(card, (actcapi_msghdr *)&card->idat.isa.rcvhdr);
 242
 243                                 if (valid) {
 244                                         card->idat.isa.rcvlen = ((actcapi_msghdr *)&card->idat.isa.rcvhdr)->len;
 245                                         card->idat.isa.rcvskb = dev_alloc_skb(card->idat.isa.rcvlen);
 246                                         if (card->idat.isa.rcvskb == NULL) {
 247                                                 card->idat.isa.rcvignore = 1;
 248                                                 printk(KERN_WARNING
 249                                                        "act2000_isa_receive: no memory\n");
 250                                                 test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
 251                                                 return;
 252                                         }
 253                                         memcpy(skb_put(card->idat.isa.rcvskb, 8), card->idat.isa.rcvhdr, 8);
 254                                         card->idat.isa.rcvptr = skb_put(card->idat.isa.rcvskb, card->idat.isa.rcvlen - 8);
 255                                 } else {
 256                                         card->idat.isa.rcvidx = 0;
 257                                         printk(KERN_WARNING
 258                                                "act2000_isa_receive: Invalid CAPI msg\n");
 259                                         {
 260                                                 int i; __u8 *p; __u8 *t; __u8 tmp[30];
 261                                                 for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, t = tmp; i < 8; i++)
 262                                                         t += sprintf(t, "%02x ", *(p++));
 263                                                 printk(KERN_WARNING "act2000_isa_receive: %s\n", tmp);
 264                                         }
 265                                 }
 266                         }
 267                 } else {
 268                         if (!card->idat.isa.rcvignore)
 269                                 *card->idat.isa.rcvptr++ = c;
 270                         if (++card->idat.isa.rcvidx >= card->idat.isa.rcvlen) {
 271                                 if (!card->idat.isa.rcvignore) {
 272                                         skb_queue_tail(&card->rcvq, card->idat.isa.rcvskb);
 273                                         act2000_schedule_rx(card);
 274                                 }
 275                                 card->idat.isa.rcvidx = 0;
 276                                 card->idat.isa.rcvlen = 8;
 277                                 card->idat.isa.rcvignore = 0;
 278                                 card->idat.isa.rcvskb = NULL;
 279                                 card->idat.isa.rcvptr = card->idat.isa.rcvhdr;
 280                         }
 281                 }
 282         }
 283         if (!(card->flags & ACT2000_FLAGS_IVALID)) {
 284                 /* In polling mode, schedule myself */
 285                 if ((card->idat.isa.rcvidx) &&
 286                     (card->idat.isa.rcvignore ||
 287                      (card->idat.isa.rcvidx < card->idat.isa.rcvlen)))
 288                         act2000_schedule_poll(card);
 289         }
 290         test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
 291 }
 292
 293 void
 294 act2000_isa_send(act2000_card *card)
 295 {
 296         unsigned long flags;
 297         struct sk_buff *skb;
 298         actcapi_msg *msg;
 299         int l;
 300
 301         if (test_and_set_bit(ACT2000_LOCK_TX, (void *) &card->ilock) != 0)
 302                 return;
 303         while (1) {
 304                 spin_lock_irqsave(&card->lock, flags);
 305                 if (!(card->sbuf)) {
 306                         if ((card->sbuf = skb_dequeue(&card->sndq))) {
 307                                 card->ack_msg = card->sbuf->data;
 308                                 msg = (actcapi_msg *)card->sbuf->data;
 309                                 if ((msg->hdr.cmd.cmd == 0x86) &&
 310                                     (msg->hdr.cmd.subcmd == 0)) {
 311                                         /* Save flags in message */
 312                                         card->need_b3ack = msg->msg.data_b3_req.flags;
 313                                         msg->msg.data_b3_req.flags = 0;
 314                                 }
 315                         }
 316                 }
 317                 spin_unlock_irqrestore(&card->lock, flags);
 318                 if (!(card->sbuf)) {
 319                         /* No more data to send */
 320                         test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
 321                         return;
 322                 }
 323                 skb = card->sbuf;
 324                 l = 0;
 325                 while (skb->len) {
 326                         if (act2000_isa_writeb(card, *(skb->data))) {
 327                                 /* Fifo is full, but more data to send */
 328                                 test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
 329                                 /* Schedule myself */
 330                                 act2000_schedule_tx(card);
 331                                 return;
 332                         }
 333                         skb_pull(skb, 1);
 334                         l++;
 335                 }
 336                 msg = (actcapi_msg *)card->ack_msg;
 337                 if ((msg->hdr.cmd.cmd == 0x86) &&
 338                     (msg->hdr.cmd.subcmd == 0)) {
 339                         /*
 340                          * If it's user data, reset data-ptr
 341                          * and put skb into ackq.
 342                          */
 343                         skb->data = card->ack_msg;
 344                         /* Restore flags in message */
 345                         msg->msg.data_b3_req.flags = card->need_b3ack;
 346                         skb_queue_tail(&card->ackq, skb);
 347                 } else
 348                         dev_kfree_skb(skb);
 349                 card->sbuf = NULL;
 350         }
 351 }
 352
 353 /*
 354  * Get firmware ID, check for 'ISDN' signature.
 355  */
 356 static int
 357 act2000_isa_getid(act2000_card *card)
 358 {
 359
 360         act2000_fwid fid;
 361         u_char *p = (u_char *)&fid;
 362         int count = 0;
 363
 364         while (1) {
 365                 if (count > 510)
 366                         return -EPROTO;
 367                 if (act2000_isa_readb(card, p++))
 368                         break;
 369                 count++;
 370         }
 371         if (count <= 20) {
 372                 printk(KERN_WARNING "act2000: No Firmware-ID!\n");
 373                 return -ETIME;
 374         }
 375         *p = '\0';
 376         fid.revlen[0] = '\0';
 377         if (strcmp(fid.isdn, "ISDN")) {
 378                 printk(KERN_WARNING "act2000: Wrong Firmware-ID!\n");
 379                 return -EPROTO;
 380         }
 381         if ((p = strchr(fid.revision, '\n')))
 382                 *p = '\0';
 383         printk(KERN_INFO "act2000: Firmware-ID: %s\n", fid.revision);
 384         if (card->flags & ACT2000_FLAGS_IVALID) {
 385                 printk(KERN_DEBUG "Enabling Interrupts ...\n");
 386                 act2000_isa_enable_irq(card);
 387         }
 388         return 0;
 389 }
 390
 391 /*
 392  * Download microcode into card, check Firmware signature.
 393  */
 394 int
 395 act2000_isa_download(act2000_card *card, act2000_ddef __user *cb)
 396 {
 397         unsigned int length;
 398         int l;
 399         int c;
 400         long timeout;
 401         u_char *b;
 402         u_char __user *p;
 403         u_char *buf;
 404         act2000_ddef cblock;
 405
 406         if (!act2000_isa_reset(card->port))
 407                 return -ENXIO;
 408         msleep_interruptible(500);
 409         if (copy_from_user(&cblock, cb, sizeof(cblock)))
 410                 return -EFAULT;
 411         length = cblock.length;
 412         p = cblock.buffer;
 413         if (!access_ok(VERIFY_READ, p, length))
 414                 return -EFAULT;
 415         buf = kmalloc(1024, GFP_KERNEL);
 416         if (!buf)
 417                 return -ENOMEM;
 418         timeout = 0;
 419         while (length) {
 420                 l = (length > 1024) ? 1024 : length;
 421                 c = 0;
 422                 b = buf;
 423                 if (copy_from_user(buf, p, l)) {
 424                         kfree(buf);
 425                         return -EFAULT;
 426                 }
 427                 while (c < l) {
 428                         if (act2000_isa_writeb(card, *b++)) {
 429                                 printk(KERN_WARNING
 430                                        "act2000: loader timed out"
 431                                        " len=%d c=%d\n", length, c);
 432                                 kfree(buf);
 433                                 return -ETIME;
 434                         }
 435                         c++;
 436                 }
 437                 length -= l;
 438                 p += l;
 439         }
 440         kfree(buf);
 441         msleep_interruptible(500);
 442         return (act2000_isa_getid(card));
 443 }