drivers/isdn/hardware/mISDN/mISDNisar.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * mISDNisar.c   ISAR (Siemens PSB 7110) specific functions
   4  *
   5  * Author Karsten Keil (keil@isdn4linux.de)
   6  *
   7  * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
   8  */
   9
  10 /* define this to enable static debug messages, if you kernel supports
  11  * dynamic debugging, you should use debugfs for this
  12  */
  13 /* #define DEBUG */
  14
  15 #include <linux/gfp.h>
  16 #include <linux/delay.h>
  17 #include <linux/vmalloc.h>
  18 #include <linux/mISDNhw.h>
  19 #include <linux/module.h>
  20 #include "isar.h"
  21
  22 #define ISAR_REV        "2.1"
  23
  24 MODULE_AUTHOR("Karsten Keil");
  25 MODULE_LICENSE("GPL v2");
  26 MODULE_VERSION(ISAR_REV);
  27
  28 #define DEBUG_HW_FIRMWARE_FIFO  0x10000
  29
  30 static const u8 faxmodulation[] = {3, 24, 48, 72, 73, 74, 96, 97, 98, 121,
  31                                    122, 145, 146};
  32 #define FAXMODCNT 13
  33
  34 static void isar_setup(struct isar_hw *);
  35
  36 static inline int
  37 waitforHIA(struct isar_hw *isar, int timeout)
  38 {
  39         int t = timeout;
  40         u8 val = isar->read_reg(isar->hw, ISAR_HIA);
  41
  42         while ((val & 1) && t) {
  43                 udelay(1);
  44                 t--;
  45                 val = isar->read_reg(isar->hw, ISAR_HIA);
  46         }
  47         pr_debug("%s: HIA after %dus\n", isar->name, timeout - t);
  48         return timeout;
  49 }
  50
  51 /*
  52  * send msg to ISAR mailbox
  53  * if msg is NULL use isar->buf
  54  */
  55 static int
  56 send_mbox(struct isar_hw *isar, u8 his, u8 creg, u8 len, u8 *msg)
  57 {
  58         if (!waitforHIA(isar, 1000))
  59                 return 0;
  60         pr_debug("send_mbox(%02x,%02x,%d)\n", his, creg, len);
  61         isar->write_reg(isar->hw, ISAR_CTRL_H, creg);
  62         isar->write_reg(isar->hw, ISAR_CTRL_L, len);
  63         isar->write_reg(isar->hw, ISAR_WADR, 0);
  64         if (!msg)
  65                 msg = isar->buf;
  66         if (msg && len) {
  67                 isar->write_fifo(isar->hw, ISAR_MBOX, msg, len);
  68                 if (isar->ch[0].bch.debug & DEBUG_HW_BFIFO) {
  69                         int l = 0;
  70
  71                         while (l < (int)len) {
  72                                 hex_dump_to_buffer(msg + l, len - l, 32, 1,
  73                                                    isar->log, 256, 1);
  74                                 pr_debug("%s: %s %02x: %s\n", isar->name,
  75                                          __func__, l, isar->log);
  76                                 l += 32;
  77                         }
  78                 }
  79         }
  80         isar->write_reg(isar->hw, ISAR_HIS, his);
  81         waitforHIA(isar, 1000);
  82         return 1;
  83 }
  84
  85 /*
  86  * receive message from ISAR mailbox
  87  * if msg is NULL use isar->buf
  88  */
  89 static void
  90 rcv_mbox(struct isar_hw *isar, u8 *msg)
  91 {
  92         if (!msg)
  93                 msg = isar->buf;
  94         isar->write_reg(isar->hw, ISAR_RADR, 0);
  95         if (msg && isar->clsb) {
  96                 isar->read_fifo(isar->hw, ISAR_MBOX, msg, isar->clsb);
  97                 if (isar->ch[0].bch.debug & DEBUG_HW_BFIFO) {
  98                         int l = 0;
  99
 100                         while (l < (int)isar->clsb) {
 101                                 hex_dump_to_buffer(msg + l, isar->clsb - l, 32,
 102                                                    1, isar->log, 256, 1);
 103                                 pr_debug("%s: %s %02x: %s\n", isar->name,
 104                                          __func__, l, isar->log);
 105                                 l += 32;
 106                         }
 107                 }
 108         }
 109         isar->write_reg(isar->hw, ISAR_IIA, 0);
 110 }
 111
 112 static inline void
 113 get_irq_infos(struct isar_hw *isar)
 114 {
 115         isar->iis = isar->read_reg(isar->hw, ISAR_IIS);
 116         isar->cmsb = isar->read_reg(isar->hw, ISAR_CTRL_H);
 117         isar->clsb = isar->read_reg(isar->hw, ISAR_CTRL_L);
 118         pr_debug("%s: rcv_mbox(%02x,%02x,%d)\n", isar->name,
 119                  isar->iis, isar->cmsb, isar->clsb);
 120 }
 121
 122 /*
 123  * poll answer message from ISAR mailbox
 124  * should be used only with ISAR IRQs disabled before DSP was started
 125  *
 126  */
 127 static int
 128 poll_mbox(struct isar_hw *isar, int maxdelay)
 129 {
 130         int t = maxdelay;
 131         u8 irq;
 132
 133         irq = isar->read_reg(isar->hw, ISAR_IRQBIT);
 134         while (t && !(irq & ISAR_IRQSTA)) {
 135                 udelay(1);
 136                 t--;
 137         }
 138         if (t)  {
 139                 get_irq_infos(isar);
 140                 rcv_mbox(isar, NULL);
 141         }
 142         pr_debug("%s: pulled %d bytes after %d us\n",
 143                  isar->name, isar->clsb, maxdelay - t);
 144         return t;
 145 }
 146
 147 static int
 148 ISARVersion(struct isar_hw *isar)
 149 {
 150         int ver;
 151
 152         /* disable ISAR IRQ */
 153         isar->write_reg(isar->hw, ISAR_IRQBIT, 0);
 154         isar->buf[0] = ISAR_MSG_HWVER;
 155         isar->buf[1] = 0;
 156         isar->buf[2] = 1;
 157         if (!send_mbox(isar, ISAR_HIS_VNR, 0, 3, NULL))
 158                 return -1;
 159         if (!poll_mbox(isar, 1000))
 160                 return -2;
 161         if (isar->iis == ISAR_IIS_VNR) {
 162                 if (isar->clsb == 1) {
 163                         ver = isar->buf[0] & 0xf;
 164                         return ver;
 165                 }
 166                 return -3;
 167         }
 168         return -4;
 169 }
 170
 171 static int
 172 load_firmware(struct isar_hw *isar, const u8 *buf, int size)
 173 {
 174         u32     saved_debug = isar->ch[0].bch.debug;
 175         int     ret, cnt;
 176         u8      nom, noc;
 177         u16     left, val, *sp = (u16 *)buf;
 178         u8      *mp;
 179         u_long  flags;
 180
 181         struct {
 182                 u16 sadr;
 183                 u16 len;
 184                 u16 d_key;
 185         } blk_head;
 186
 187         if (1 != isar->version) {
 188                 pr_err("%s: ISAR wrong version %d firmware download aborted\n",
 189                        isar->name, isar->version);
 190                 return -EINVAL;
 191         }
 192         if (!(saved_debug & DEBUG_HW_FIRMWARE_FIFO))
 193                 isar->ch[0].bch.debug &= ~DEBUG_HW_BFIFO;
 194         pr_debug("%s: load firmware %d words (%d bytes)\n",
 195                  isar->name, size / 2, size);
 196         cnt = 0;
 197         size /= 2;
 198         /* disable ISAR IRQ */
 199         spin_lock_irqsave(isar->hwlock, flags);
 200         isar->write_reg(isar->hw, ISAR_IRQBIT, 0);
 201         spin_unlock_irqrestore(isar->hwlock, flags);
 202         while (cnt < size) {
 203                 blk_head.sadr = le16_to_cpu(*sp++);
 204                 blk_head.len = le16_to_cpu(*sp++);
 205                 blk_head.d_key = le16_to_cpu(*sp++);
 206                 cnt += 3;
 207                 pr_debug("ISAR firmware block (%#x,%d,%#x)\n",
 208                          blk_head.sadr, blk_head.len, blk_head.d_key & 0xff);
 209                 left = blk_head.len;
 210                 if (cnt + left > size) {
 211                         pr_info("%s: firmware error have %d need %d words\n",
 212                                 isar->name, size, cnt + left);
 213                         ret = -EINVAL;
 214                         goto reterrflg;
 215                 }
 216                 spin_lock_irqsave(isar->hwlock, flags);
 217                 if (!send_mbox(isar, ISAR_HIS_DKEY, blk_head.d_key & 0xff,
 218                                0, NULL)) {
 219                         pr_info("ISAR send_mbox dkey failed\n");
 220                         ret = -ETIME;
 221                         goto reterror;
 222                 }
 223                 if (!poll_mbox(isar, 1000)) {
 224                         pr_warn("ISAR poll_mbox dkey failed\n");
 225                         ret = -ETIME;
 226                         goto reterror;
 227                 }
 228                 spin_unlock_irqrestore(isar->hwlock, flags);
 229                 if ((isar->iis != ISAR_IIS_DKEY) || isar->cmsb || isar->clsb) {
 230                         pr_info("ISAR wrong dkey response (%x,%x,%x)\n",
 231                                 isar->iis, isar->cmsb, isar->clsb);
 232                         ret = 1;
 233                         goto reterrflg;
 234                 }
 235                 while (left > 0) {
 236                         if (left > 126)
 237                                 noc = 126;
 238                         else
 239                                 noc = left;
 240                         nom = (2 * noc) + 3;
 241                         mp  = isar->buf;
 242                         /* the ISAR is big endian */
 243                         *mp++ = blk_head.sadr >> 8;
 244                         *mp++ = blk_head.sadr & 0xFF;
 245                         left -= noc;
 246                         cnt += noc;
 247                         *mp++ = noc;
 248                         pr_debug("%s: load %3d words at %04x\n", isar->name,
 249                                  noc, blk_head.sadr);
 250                         blk_head.sadr += noc;
 251                         while (noc) {
 252                                 val = le16_to_cpu(*sp++);
 253                                 *mp++ = val >> 8;
 254                                 *mp++ = val & 0xFF;
 255                                 noc--;
 256                         }
 257                         spin_lock_irqsave(isar->hwlock, flags);
 258                         if (!send_mbox(isar, ISAR_HIS_FIRM, 0, nom, NULL)) {
 259                                 pr_info("ISAR send_mbox prog failed\n");
 260                                 ret = -ETIME;
 261                                 goto reterror;
 262                         }
 263                         if (!poll_mbox(isar, 1000)) {
 264                                 pr_info("ISAR poll_mbox prog failed\n");
 265                                 ret = -ETIME;
 266                                 goto reterror;
 267                         }
 268                         spin_unlock_irqrestore(isar->hwlock, flags);
 269                         if ((isar->iis != ISAR_IIS_FIRM) ||
 270                             isar->cmsb || isar->clsb) {
 271                                 pr_info("ISAR wrong prog response (%x,%x,%x)\n",
 272                                         isar->iis, isar->cmsb, isar->clsb);
 273                                 ret = -EIO;
 274                                 goto reterrflg;
 275                         }
 276                 }
 277                 pr_debug("%s: ISAR firmware block %d words loaded\n",
 278                          isar->name, blk_head.len);
 279         }
 280         isar->ch[0].bch.debug = saved_debug;
 281         /* 10ms delay */
 282         cnt = 10;
 283         while (cnt--)
 284                 mdelay(1);
 285         isar->buf[0] = 0xff;
 286         isar->buf[1] = 0xfe;
 287         isar->bstat = 0;
 288         spin_lock_irqsave(isar->hwlock, flags);
 289         if (!send_mbox(isar, ISAR_HIS_STDSP, 0, 2, NULL)) {
 290                 pr_info("ISAR send_mbox start dsp failed\n");
 291                 ret = -ETIME;
 292                 goto reterror;
 293         }
 294         if (!poll_mbox(isar, 1000)) {
 295                 pr_info("ISAR poll_mbox start dsp failed\n");
 296                 ret = -ETIME;
 297                 goto reterror;
 298         }
 299         if ((isar->iis != ISAR_IIS_STDSP) || isar->cmsb || isar->clsb) {
 300                 pr_info("ISAR wrong start dsp response (%x,%x,%x)\n",
 301                         isar->iis, isar->cmsb, isar->clsb);
 302                 ret = -EIO;
 303                 goto reterror;
 304         } else
 305                 pr_debug("%s: ISAR start dsp success\n", isar->name);
 306
 307         /* NORMAL mode entered */
 308         /* Enable IRQs of ISAR */
 309         isar->write_reg(isar->hw, ISAR_IRQBIT, ISAR_IRQSTA);
 310         spin_unlock_irqrestore(isar->hwlock, flags);
 311         cnt = 1000; /* max 1s */
 312         while ((!isar->bstat) && cnt) {
 313                 mdelay(1);
 314                 cnt--;
 315         }
 316         if (!cnt) {
 317                 pr_info("ISAR no general status event received\n");
 318                 ret = -ETIME;
 319                 goto reterrflg;
 320         } else
 321                 pr_debug("%s: ISAR general status event %x\n",
 322                          isar->name, isar->bstat);
 323         /* 10ms delay */
 324         cnt = 10;
 325         while (cnt--)
 326                 mdelay(1);
 327         isar->iis = 0;
 328         spin_lock_irqsave(isar->hwlock, flags);
 329         if (!send_mbox(isar, ISAR_HIS_DIAG, ISAR_CTRL_STST, 0, NULL)) {
 330                 pr_info("ISAR send_mbox self tst failed\n");
 331                 ret = -ETIME;
 332                 goto reterror;
 333         }
 334         spin_unlock_irqrestore(isar->hwlock, flags);
 335         cnt = 10000; /* max 100 ms */
 336         while ((isar->iis != ISAR_IIS_DIAG) && cnt) {
 337                 udelay(10);
 338                 cnt--;
 339         }
 340         mdelay(1);
 341         if (!cnt) {
 342                 pr_info("ISAR no self tst response\n");
 343                 ret = -ETIME;
 344                 goto reterrflg;
 345         }
 346         if ((isar->cmsb == ISAR_CTRL_STST) && (isar->clsb == 1)
 347             && (isar->buf[0] == 0))
 348                 pr_debug("%s: ISAR selftest OK\n", isar->name);
 349         else {
 350                 pr_info("ISAR selftest not OK %x/%x/%x\n",
 351                         isar->cmsb, isar->clsb, isar->buf[0]);
 352                 ret = -EIO;
 353                 goto reterrflg;
 354         }
 355         spin_lock_irqsave(isar->hwlock, flags);
 356         isar->iis = 0;
 357         if (!send_mbox(isar, ISAR_HIS_DIAG, ISAR_CTRL_SWVER, 0, NULL)) {
 358                 pr_info("ISAR RQST SVN failed\n");
 359                 ret = -ETIME;
 360                 goto reterror;
 361         }
 362         spin_unlock_irqrestore(isar->hwlock, flags);
 363         cnt = 30000; /* max 300 ms */
 364         while ((isar->iis != ISAR_IIS_DIAG) && cnt) {
 365                 udelay(10);
 366                 cnt--;
 367         }
 368         mdelay(1);
 369         if (!cnt) {
 370                 pr_info("ISAR no SVN response\n");
 371                 ret = -ETIME;
 372                 goto reterrflg;
 373         } else {
 374                 if ((isar->cmsb == ISAR_CTRL_SWVER) && (isar->clsb == 1)) {
 375                         pr_notice("%s: ISAR software version %#x\n",
 376                                   isar->name, isar->buf[0]);
 377                 } else {
 378                         pr_info("%s: ISAR wrong swver response (%x,%x)"
 379                                 " cnt(%d)\n", isar->name, isar->cmsb,
 380                                 isar->clsb, cnt);
 381                         ret = -EIO;
 382                         goto reterrflg;
 383                 }
 384         }
 385         spin_lock_irqsave(isar->hwlock, flags);
 386         isar_setup(isar);
 387         spin_unlock_irqrestore(isar->hwlock, flags);
 388         ret = 0;
 389 reterrflg:
 390         spin_lock_irqsave(isar->hwlock, flags);
 391 reterror:
 392         isar->ch[0].bch.debug = saved_debug;
 393         if (ret)
 394                 /* disable ISAR IRQ */
 395                 isar->write_reg(isar->hw, ISAR_IRQBIT, 0);
 396         spin_unlock_irqrestore(isar->hwlock, flags);
 397         return ret;
 398 }
 399
 400 static inline void
 401 deliver_status(struct isar_ch *ch, int status)
 402 {
 403         pr_debug("%s: HL->LL FAXIND %x\n", ch->is->name, status);
 404         _queue_data(&ch->bch.ch, PH_CONTROL_IND, status, 0, NULL, GFP_ATOMIC);
 405 }
 406
 407 static inline void
 408 isar_rcv_frame(struct isar_ch *ch)
 409 {
 410         u8      *ptr;
 411         int     maxlen;
 412
 413         if (!ch->is->clsb) {
 414                 pr_debug("%s; ISAR zero len frame\n", ch->is->name);
 415                 ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 416                 return;
 417         }
 418         if (test_bit(FLG_RX_OFF, &ch->bch.Flags)) {
 419                 ch->bch.dropcnt += ch->is->clsb;
 420                 ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 421                 return;
 422         }
 423         switch (ch->bch.state) {
 424         case ISDN_P_NONE:
 425                 pr_debug("%s: ISAR protocol 0 spurious IIS_RDATA %x/%x/%x\n",
 426                          ch->is->name, ch->is->iis, ch->is->cmsb, ch->is->clsb);
 427                 ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 428                 break;
 429         case ISDN_P_B_RAW:
 430         case ISDN_P_B_L2DTMF:
 431         case ISDN_P_B_MODEM_ASYNC:
 432                 maxlen = bchannel_get_rxbuf(&ch->bch, ch->is->clsb);
 433                 if (maxlen < 0) {
 434                         pr_warn("%s.B%d: No bufferspace for %d bytes\n",
 435                                 ch->is->name, ch->bch.nr, ch->is->clsb);
 436                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 437                         break;
 438                 }
 439                 rcv_mbox(ch->is, skb_put(ch->bch.rx_skb, ch->is->clsb));
 440                 recv_Bchannel(&ch->bch, 0, false);
 441                 break;
 442         case ISDN_P_B_HDLC:
 443                 maxlen = bchannel_get_rxbuf(&ch->bch, ch->is->clsb);
 444                 if (maxlen < 0) {
 445                         pr_warn("%s.B%d: No bufferspace for %d bytes\n",
 446                                 ch->is->name, ch->bch.nr, ch->is->clsb);
 447                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 448                         break;
 449                 }
 450                 if (ch->is->cmsb & HDLC_ERROR) {
 451                         pr_debug("%s: ISAR frame error %x len %d\n",
 452                                  ch->is->name, ch->is->cmsb, ch->is->clsb);
 453 #ifdef ERROR_STATISTIC
 454                         if (ch->is->cmsb & HDLC_ERR_RER)
 455                                 ch->bch.err_inv++;
 456                         if (ch->is->cmsb & HDLC_ERR_CER)
 457                                 ch->bch.err_crc++;
 458 #endif
 459                         skb_trim(ch->bch.rx_skb, 0);
 460                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 461                         break;
 462                 }
 463                 if (ch->is->cmsb & HDLC_FSD)
 464                         skb_trim(ch->bch.rx_skb, 0);
 465                 ptr = skb_put(ch->bch.rx_skb, ch->is->clsb);
 466                 rcv_mbox(ch->is, ptr);
 467                 if (ch->is->cmsb & HDLC_FED) {
 468                         if (ch->bch.rx_skb->len < 3) { /* last 2 are the FCS */
 469                                 pr_debug("%s: ISAR frame too short %d\n",
 470                                          ch->is->name, ch->bch.rx_skb->len);
 471                                 skb_trim(ch->bch.rx_skb, 0);
 472                                 break;
 473                         }
 474                         skb_trim(ch->bch.rx_skb, ch->bch.rx_skb->len - 2);
 475                         recv_Bchannel(&ch->bch, 0, false);
 476                 }
 477                 break;
 478         case ISDN_P_B_T30_FAX:
 479                 if (ch->state != STFAX_ACTIV) {
 480                         pr_debug("%s: isar_rcv_frame: not ACTIV\n",
 481                                  ch->is->name);
 482                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 483                         if (ch->bch.rx_skb)
 484                                 skb_trim(ch->bch.rx_skb, 0);
 485                         break;
 486                 }
 487                 if (!ch->bch.rx_skb) {
 488                         ch->bch.rx_skb = mI_alloc_skb(ch->bch.maxlen,
 489                                                       GFP_ATOMIC);
 490                         if (unlikely(!ch->bch.rx_skb)) {
 491                                 pr_info("%s: B receive out of memory\n",
 492                                         __func__);
 493                                 ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 494                                 break;
 495                         }
 496                 }
 497                 if (ch->cmd == PCTRL_CMD_FRM) {
 498                         rcv_mbox(ch->is, skb_put(ch->bch.rx_skb, ch->is->clsb));
 499                         pr_debug("%s: isar_rcv_frame: %d\n",
 500                                  ch->is->name, ch->bch.rx_skb->len);
 501                         if (ch->is->cmsb & SART_NMD) { /* ABORT */
 502                                 pr_debug("%s: isar_rcv_frame: no more data\n",
 503                                          ch->is->name);
 504                                 ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 505                                 send_mbox(ch->is, SET_DPS(ch->dpath) |
 506                                           ISAR_HIS_PUMPCTRL, PCTRL_CMD_ESC,
 507                                           0, NULL);
 508                                 ch->state = STFAX_ESCAPE;
 509                                 /* set_skb_flag(skb, DF_NOMOREDATA); */
 510                         }
 511                         recv_Bchannel(&ch->bch, 0, false);
 512                         if (ch->is->cmsb & SART_NMD)
 513                                 deliver_status(ch, HW_MOD_NOCARR);
 514                         break;
 515                 }
 516                 if (ch->cmd != PCTRL_CMD_FRH) {
 517                         pr_debug("%s: isar_rcv_frame: unknown fax mode %x\n",
 518                                  ch->is->name, ch->cmd);
 519                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 520                         if (ch->bch.rx_skb)
 521                                 skb_trim(ch->bch.rx_skb, 0);
 522                         break;
 523                 }
 524                 /* PCTRL_CMD_FRH */
 525                 if ((ch->bch.rx_skb->len + ch->is->clsb) >
 526                     (ch->bch.maxlen + 2)) {
 527                         pr_info("%s: %s incoming packet too large\n",
 528                                 ch->is->name, __func__);
 529                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 530                         skb_trim(ch->bch.rx_skb, 0);
 531                         break;
 532                 }  else if (ch->is->cmsb & HDLC_ERROR) {
 533                         pr_info("%s: ISAR frame error %x len %d\n",
 534                                 ch->is->name, ch->is->cmsb, ch->is->clsb);
 535                         skb_trim(ch->bch.rx_skb, 0);
 536                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 537                         break;
 538                 }
 539                 if (ch->is->cmsb & HDLC_FSD)
 540                         skb_trim(ch->bch.rx_skb, 0);
 541                 ptr = skb_put(ch->bch.rx_skb, ch->is->clsb);
 542                 rcv_mbox(ch->is, ptr);
 543                 if (ch->is->cmsb & HDLC_FED) {
 544                         if (ch->bch.rx_skb->len < 3) { /* last 2 are the FCS */
 545                                 pr_info("%s: ISAR frame too short %d\n",
 546                                         ch->is->name, ch->bch.rx_skb->len);
 547                                 skb_trim(ch->bch.rx_skb, 0);
 548                                 break;
 549                         }
 550                         skb_trim(ch->bch.rx_skb, ch->bch.rx_skb->len - 2);
 551                         recv_Bchannel(&ch->bch, 0, false);
 552                 }
 553                 if (ch->is->cmsb & SART_NMD) { /* ABORT */
 554                         pr_debug("%s: isar_rcv_frame: no more data\n",
 555                                  ch->is->name);
 556                         ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 557                         if (ch->bch.rx_skb)
 558                                 skb_trim(ch->bch.rx_skb, 0);
 559                         send_mbox(ch->is, SET_DPS(ch->dpath) |
 560                                   ISAR_HIS_PUMPCTRL, PCTRL_CMD_ESC, 0, NULL);
 561                         ch->state = STFAX_ESCAPE;
 562                         deliver_status(ch, HW_MOD_NOCARR);
 563                 }
 564                 break;
 565         default:
 566                 pr_info("isar_rcv_frame protocol (%x)error\n", ch->bch.state);
 567                 ch->is->write_reg(ch->is->hw, ISAR_IIA, 0);
 568                 break;
 569         }
 570 }
 571
 572 static void
 573 isar_fill_fifo(struct isar_ch *ch)
 574 {
 575         int count;
 576         u8 msb;
 577         u8 *ptr;
 578
 579         pr_debug("%s: ch%d  tx_skb %d tx_idx %d\n", ch->is->name, ch->bch.nr,
 580                  ch->bch.tx_skb ? ch->bch.tx_skb->len : -1, ch->bch.tx_idx);
 581         if (!(ch->is->bstat &
 582               (ch->dpath == 1 ? BSTAT_RDM1 : BSTAT_RDM2)))
 583                 return;
 584         if (!ch->bch.tx_skb) {
 585                 if (!test_bit(FLG_TX_EMPTY, &ch->bch.Flags) ||
 586                     (ch->bch.state != ISDN_P_B_RAW))
 587                         return;
 588                 count = ch->mml;
 589                 /* use the card buffer */
 590                 memset(ch->is->buf, ch->bch.fill[0], count);
 591                 send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA,
 592                           0, count, ch->is->buf);
 593                 return;
 594         }
 595         count = ch->bch.tx_skb->len - ch->bch.tx_idx;
 596         if (count <= 0)
 597                 return;
 598         if (count > ch->mml) {
 599                 msb = 0;
 600                 count = ch->mml;
 601         } else {
 602                 msb = HDLC_FED;
 603         }
 604         ptr = ch->bch.tx_skb->data + ch->bch.tx_idx;
 605         if (!ch->bch.tx_idx) {
 606                 pr_debug("%s: frame start\n", ch->is->name);
 607                 if ((ch->bch.state == ISDN_P_B_T30_FAX) &&
 608                     (ch->cmd == PCTRL_CMD_FTH)) {
 609                         if (count > 1) {
 610                                 if ((ptr[0] == 0xff) && (ptr[1] == 0x13)) {
 611                                         /* last frame */
 612                                         test_and_set_bit(FLG_LASTDATA,
 613                                                          &ch->bch.Flags);
 614                                         pr_debug("%s: set LASTDATA\n",
 615                                                  ch->is->name);
 616                                         if (msb == HDLC_FED)
 617                                                 test_and_set_bit(FLG_DLEETX,
 618                                                                  &ch->bch.Flags);
 619                                 }
 620                         }
 621                 }
 622                 msb |= HDLC_FST;
 623         }
 624         ch->bch.tx_idx += count;
 625         switch (ch->bch.state) {
 626         case ISDN_P_NONE:
 627                 pr_info("%s: wrong protocol 0\n", __func__);
 628                 break;
 629         case ISDN_P_B_RAW:
 630         case ISDN_P_B_L2DTMF:
 631         case ISDN_P_B_MODEM_ASYNC:
 632                 send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA,
 633                           0, count, ptr);
 634                 break;
 635         case ISDN_P_B_HDLC:
 636                 send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA,
 637                           msb, count, ptr);
 638                 break;
 639         case ISDN_P_B_T30_FAX:
 640                 if (ch->state != STFAX_ACTIV)
 641                         pr_debug("%s: not ACTIV\n", ch->is->name);
 642                 else if (ch->cmd == PCTRL_CMD_FTH)
 643                         send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA,
 644                                   msb, count, ptr);
 645                 else if (ch->cmd == PCTRL_CMD_FTM)
 646                         send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA,
 647                                   0, count, ptr);
 648                 else
 649                         pr_debug("%s: not FTH/FTM\n", ch->is->name);
 650                 break;
 651         default:
 652                 pr_info("%s: protocol(%x) error\n",
 653                         __func__, ch->bch.state);
 654                 break;
 655         }
 656 }
 657
 658 static inline struct isar_ch *
 659 sel_bch_isar(struct isar_hw *isar, u8 dpath)
 660 {
 661         struct isar_ch  *base = &isar->ch[0];
 662
 663         if ((!dpath) || (dpath > 2))
 664                 return NULL;
 665         if (base->dpath == dpath)
 666                 return base;
 667         base++;
 668         if (base->dpath == dpath)
 669                 return base;
 670         return NULL;
 671 }
 672
 673 static void
 674 send_next(struct isar_ch *ch)
 675 {
 676         pr_debug("%s: %s ch%d tx_skb %d tx_idx %d\n", ch->is->name, __func__,
 677                  ch->bch.nr, ch->bch.tx_skb ? ch->bch.tx_skb->len : -1,
 678                  ch->bch.tx_idx);
 679         if (ch->bch.state == ISDN_P_B_T30_FAX) {
 680                 if (ch->cmd == PCTRL_CMD_FTH) {
 681                         if (test_bit(FLG_LASTDATA, &ch->bch.Flags)) {
 682                                 pr_debug("set NMD_DATA\n");
 683                                 test_and_set_bit(FLG_NMD_DATA, &ch->bch.Flags);
 684                         }
 685                 } else if (ch->cmd == PCTRL_CMD_FTM) {
 686                         if (test_bit(FLG_DLEETX, &ch->bch.Flags)) {
 687                                 test_and_set_bit(FLG_LASTDATA, &ch->bch.Flags);
 688                                 test_and_set_bit(FLG_NMD_DATA, &ch->bch.Flags);
 689                         }
 690                 }
 691         }
 692         dev_kfree_skb(ch->bch.tx_skb);
 693         if (get_next_bframe(&ch->bch)) {
 694                 isar_fill_fifo(ch);
 695                 test_and_clear_bit(FLG_TX_EMPTY, &ch->bch.Flags);
 696         } else if (test_bit(FLG_TX_EMPTY, &ch->bch.Flags)) {
 697                 isar_fill_fifo(ch);
 698         } else {
 699                 if (test_and_clear_bit(FLG_DLEETX, &ch->bch.Flags)) {
 700                         if (test_and_clear_bit(FLG_LASTDATA,
 701                                                &ch->bch.Flags)) {
 702                                 if (test_and_clear_bit(FLG_NMD_DATA,
 703                                                        &ch->bch.Flags)) {
 704                                         u8 zd = 0;
 705                                         send_mbox(ch->is, SET_DPS(ch->dpath) |
 706                                                   ISAR_HIS_SDATA, 0x01, 1, &zd);
 707                                 }
 708                                 test_and_set_bit(FLG_LL_OK, &ch->bch.Flags);
 709                         } else {
 710                                 deliver_status(ch, HW_MOD_CONNECT);
 711                         }
 712                 } else if (test_bit(FLG_FILLEMPTY, &ch->bch.Flags)) {
 713                         test_and_set_bit(FLG_TX_EMPTY, &ch->bch.Flags);
 714                 }
 715         }
 716 }
 717
 718 static void
 719 check_send(struct isar_hw *isar, u8 rdm)
 720 {
 721         struct isar_ch  *ch;
 722
 723         pr_debug("%s: rdm %x\n", isar->name, rdm);
 724         if (rdm & BSTAT_RDM1) {
 725                 ch = sel_bch_isar(isar, 1);
 726                 if (ch && test_bit(FLG_ACTIVE, &ch->bch.Flags)) {
 727                         if (ch->bch.tx_skb && (ch->bch.tx_skb->len >
 728                                                ch->bch.tx_idx))
 729                                 isar_fill_fifo(ch);
 730                         else
 731                                 send_next(ch);
 732                 }
 733         }
 734         if (rdm & BSTAT_RDM2) {
 735                 ch = sel_bch_isar(isar, 2);
 736                 if (ch && test_bit(FLG_ACTIVE, &ch->bch.Flags)) {
 737                         if (ch->bch.tx_skb && (ch->bch.tx_skb->len >
 738                                                ch->bch.tx_idx))
 739                                 isar_fill_fifo(ch);
 740                         else
 741                                 send_next(ch);
 742                 }
 743         }
 744 }
 745
 746 static const char *dmril[] = {"NO SPEED", "1200/75", "NODEF2", "75/1200", "NODEF4",
 747                        "300", "600", "1200", "2400", "4800", "7200",
 748                        "9600nt", "9600t", "12000", "14400", "WRONG"};
 749 static const char *dmrim[] = {"NO MOD", "NO DEF", "V32/V32b", "V22", "V21",
 750                        "Bell103", "V23", "Bell202", "V17", "V29", "V27ter"};
 751
 752 static void
 753 isar_pump_status_rsp(struct isar_ch *ch) {
 754         u8 ril = ch->is->buf[0];
 755         u8 rim;
 756
 757         if (!test_and_clear_bit(ISAR_RATE_REQ, &ch->is->Flags))
 758                 return;
 759         if (ril > 14) {
 760                 pr_info("%s: wrong pstrsp ril=%d\n", ch->is->name, ril);
 761                 ril = 15;
 762         }
 763         switch (ch->is->buf[1]) {
 764         case 0:
 765                 rim = 0;
 766                 break;
 767         case 0x20:
 768                 rim = 2;
 769                 break;
 770         case 0x40:
 771                 rim = 3;
 772                 break;
 773         case 0x41:
 774                 rim = 4;
 775                 break;
 776         case 0x51:
 777                 rim = 5;
 778                 break;
 779         case 0x61:
 780                 rim = 6;
 781                 break;
 782         case 0x71:
 783                 rim = 7;
 784                 break;
 785         case 0x82:
 786                 rim = 8;
 787                 break;
 788         case 0x92:
 789                 rim = 9;
 790                 break;
 791         case 0xa2:
 792                 rim = 10;
 793                 break;
 794         default:
 795                 rim = 1;
 796                 break;
 797         }
 798         sprintf(ch->conmsg, "%s %s", dmril[ril], dmrim[rim]);
 799         pr_debug("%s: pump strsp %s\n", ch->is->name, ch->conmsg);
 800 }
 801
 802 static void
 803 isar_pump_statev_modem(struct isar_ch *ch, u8 devt) {
 804         u8 dps = SET_DPS(ch->dpath);
 805
 806         switch (devt) {
 807         case PSEV_10MS_TIMER:
 808                 pr_debug("%s: pump stev TIMER\n", ch->is->name);
 809                 break;
 810         case PSEV_CON_ON:
 811                 pr_debug("%s: pump stev CONNECT\n", ch->is->name);
 812                 deliver_status(ch, HW_MOD_CONNECT);
 813                 break;
 814         case PSEV_CON_OFF:
 815                 pr_debug("%s: pump stev NO CONNECT\n", ch->is->name);
 816                 send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL);
 817                 deliver_status(ch, HW_MOD_NOCARR);
 818                 break;
 819         case PSEV_V24_OFF:
 820                 pr_debug("%s: pump stev V24 OFF\n", ch->is->name);
 821                 break;
 822         case PSEV_CTS_ON:
 823                 pr_debug("%s: pump stev CTS ON\n", ch->is->name);
 824                 break;
 825         case PSEV_CTS_OFF:
 826                 pr_debug("%s pump stev CTS OFF\n", ch->is->name);
 827                 break;
 828         case PSEV_DCD_ON:
 829                 pr_debug("%s: pump stev CARRIER ON\n", ch->is->name);
 830                 test_and_set_bit(ISAR_RATE_REQ, &ch->is->Flags);
 831                 send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL);
 832                 break;
 833         case PSEV_DCD_OFF:
 834                 pr_debug("%s: pump stev CARRIER OFF\n", ch->is->name);
 835                 break;
 836         case PSEV_DSR_ON:
 837                 pr_debug("%s: pump stev DSR ON\n", ch->is->name);
 838                 break;
 839         case PSEV_DSR_OFF:
 840                 pr_debug("%s: pump stev DSR_OFF\n", ch->is->name);
 841                 break;
 842         case PSEV_REM_RET:
 843                 pr_debug("%s: pump stev REMOTE RETRAIN\n", ch->is->name);
 844                 break;
 845         case PSEV_REM_REN:
 846                 pr_debug("%s: pump stev REMOTE RENEGOTIATE\n", ch->is->name);
 847                 break;
 848         case PSEV_GSTN_CLR:
 849                 pr_debug("%s: pump stev GSTN CLEAR\n", ch->is->name);
 850                 break;
 851         default:
 852                 pr_info("u%s: unknown pump stev %x\n", ch->is->name, devt);
 853                 break;
 854         }
 855 }
 856
 857 static void
 858 isar_pump_statev_fax(struct isar_ch *ch, u8 devt) {
 859         u8 dps = SET_DPS(ch->dpath);
 860         u8 p1;
 861
 862         switch (devt) {
 863         case PSEV_10MS_TIMER:
 864                 pr_debug("%s: pump stev TIMER\n", ch->is->name);
 865                 break;
 866         case PSEV_RSP_READY:
 867                 pr_debug("%s: pump stev RSP_READY\n", ch->is->name);
 868                 ch->state = STFAX_READY;
 869                 deliver_status(ch, HW_MOD_READY);
 870 #ifdef AUTOCON
 871                 if (test_bit(BC_FLG_ORIG, &ch->bch.Flags))
 872                         isar_pump_cmd(bch, HW_MOD_FRH, 3);
 873                 else
 874                         isar_pump_cmd(bch, HW_MOD_FTH, 3);
 875 #endif
 876                 break;
 877         case PSEV_LINE_TX_H:
 878                 if (ch->state == STFAX_LINE) {
 879                         pr_debug("%s: pump stev LINE_TX_H\n", ch->is->name);
 880                         ch->state = STFAX_CONT;
 881                         send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
 882                                   PCTRL_CMD_CONT, 0, NULL);
 883                 } else {
 884                         pr_debug("%s: pump stev LINE_TX_H wrong st %x\n",
 885                                  ch->is->name, ch->state);
 886                 }
 887                 break;
 888         case PSEV_LINE_RX_H:
 889                 if (ch->state == STFAX_LINE) {
 890                         pr_debug("%s: pump stev LINE_RX_H\n", ch->is->name);
 891                         ch->state = STFAX_CONT;
 892                         send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
 893                                   PCTRL_CMD_CONT, 0, NULL);
 894                 } else {
 895                         pr_debug("%s: pump stev LINE_RX_H wrong st %x\n",
 896                                  ch->is->name, ch->state);
 897                 }
 898                 break;
 899         case PSEV_LINE_TX_B:
 900                 if (ch->state == STFAX_LINE) {
 901                         pr_debug("%s: pump stev LINE_TX_B\n", ch->is->name);
 902                         ch->state = STFAX_CONT;
 903                         send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
 904                                   PCTRL_CMD_CONT, 0, NULL);
 905                 } else {
 906                         pr_debug("%s: pump stev LINE_TX_B wrong st %x\n",
 907                                  ch->is->name, ch->state);
 908                 }
 909                 break;
 910         case PSEV_LINE_RX_B:
 911                 if (ch->state == STFAX_LINE) {
 912                         pr_debug("%s: pump stev LINE_RX_B\n", ch->is->name);
 913                         ch->state = STFAX_CONT;
 914                         send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
 915                                   PCTRL_CMD_CONT, 0, NULL);
 916                 } else {
 917                         pr_debug("%s: pump stev LINE_RX_B wrong st %x\n",
 918                                  ch->is->name, ch->state);
 919                 }
 920                 break;
 921         case PSEV_RSP_CONN:
 922                 if (ch->state == STFAX_CONT) {
 923                         pr_debug("%s: pump stev RSP_CONN\n", ch->is->name);
 924                         ch->state = STFAX_ACTIV;
 925                         test_and_set_bit(ISAR_RATE_REQ, &ch->is->Flags);
 926                         send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL);
 927                         if (ch->cmd == PCTRL_CMD_FTH) {
 928                                 int delay = (ch->mod == 3) ? 1000 : 200;
 929                                 /* 1s (200 ms) Flags before data */
 930                                 if (test_and_set_bit(FLG_FTI_RUN,
 931                                                      &ch->bch.Flags))
 932                                         del_timer(&ch->ftimer);
 933                                 ch->ftimer.expires =
 934                                         jiffies + ((delay * HZ) / 1000);
 935                                 test_and_set_bit(FLG_LL_CONN,
 936                                                  &ch->bch.Flags);
 937                                 add_timer(&ch->ftimer);
 938                         } else {
 939                                 deliver_status(ch, HW_MOD_CONNECT);
 940                         }
 941                 } else {
 942                         pr_debug("%s: pump stev RSP_CONN wrong st %x\n",
 943                                  ch->is->name, ch->state);
 944                 }
 945                 break;
 946         case PSEV_FLAGS_DET:
 947                 pr_debug("%s: pump stev FLAGS_DET\n", ch->is->name);
 948                 break;
 949         case PSEV_RSP_DISC:
 950                 pr_debug("%s: pump stev RSP_DISC state(%d)\n",
 951                          ch->is->name, ch->state);
 952                 if (ch->state == STFAX_ESCAPE) {
 953                         p1 = 5;
 954                         switch (ch->newcmd) {
 955                         case 0:
 956                                 ch->state = STFAX_READY;
 957                                 break;
 958                         case PCTRL_CMD_FTM:
 959                                 p1 = 2;
 960                                 fallthrough;
 961                         case PCTRL_CMD_FTH:
 962                                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
 963                                           PCTRL_CMD_SILON, 1, &p1);
 964                                 ch->state = STFAX_SILDET;
 965                                 break;
 966                         case PCTRL_CMD_FRH:
 967                         case PCTRL_CMD_FRM:
 968                                 ch->mod = ch->newmod;
 969                                 p1 = ch->newmod;
 970                                 ch->newmod = 0;
 971                                 ch->cmd = ch->newcmd;
 972                                 ch->newcmd = 0;
 973                                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
 974                                           ch->cmd, 1, &p1);
 975                                 ch->state = STFAX_LINE;
 976                                 ch->try_mod = 3;
 977                                 break;
 978                         default:
 979                                 pr_debug("%s: RSP_DISC unknown newcmd %x\n",
 980                                          ch->is->name, ch->newcmd);
 981                                 break;
 982                         }
 983                 } else if (ch->state == STFAX_ACTIV) {
 984                         if (test_and_clear_bit(FLG_LL_OK, &ch->bch.Flags))
 985                                 deliver_status(ch, HW_MOD_OK);
 986                         else if (ch->cmd == PCTRL_CMD_FRM)
 987                                 deliver_status(ch, HW_MOD_NOCARR);
 988                         else
 989                                 deliver_status(ch, HW_MOD_FCERROR);
 990                         ch->state = STFAX_READY;
 991                 } else if (ch->state != STFAX_SILDET) {
 992                         /* ignore in STFAX_SILDET */
 993                         ch->state = STFAX_READY;
 994                         deliver_status(ch, HW_MOD_FCERROR);
 995                 }
 996                 break;
 997         case PSEV_RSP_SILDET:
 998                 pr_debug("%s: pump stev RSP_SILDET\n", ch->is->name);
 999                 if (ch->state == STFAX_SILDET) {
1000                         ch->mod = ch->newmod;
1001                         p1 = ch->newmod;
1002                         ch->newmod = 0;
1003                         ch->cmd = ch->newcmd;
1004                         ch->newcmd = 0;
1005                         send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
1006                                   ch->cmd, 1, &p1);
1007                         ch->state = STFAX_LINE;
1008                         ch->try_mod = 3;
1009                 }
1010                 break;
1011         case PSEV_RSP_SILOFF:
1012                 pr_debug("%s: pump stev RSP_SILOFF\n", ch->is->name);
1013                 break;
1014         case PSEV_RSP_FCERR:
1015                 if (ch->state == STFAX_LINE) {
1016                         pr_debug("%s: pump stev RSP_FCERR try %d\n",
1017                                  ch->is->name, ch->try_mod);
1018                         if (ch->try_mod--) {
1019                                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
1020                                           ch->cmd, 1, &ch->mod);
1021                                 break;
1022                         }
1023                 }
1024                 pr_debug("%s: pump stev RSP_FCERR\n", ch->is->name);
1025                 ch->state = STFAX_ESCAPE;
1026                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, PCTRL_CMD_ESC,
1027                           0, NULL);
1028                 deliver_status(ch, HW_MOD_FCERROR);
1029                 break;
1030         default:
1031                 break;
1032         }
1033 }
1034
1035 void
1036 mISDNisar_irq(struct isar_hw *isar)
1037 {
1038         struct isar_ch *ch;
1039
1040         get_irq_infos(isar);
1041         switch (isar->iis & ISAR_IIS_MSCMSD) {
1042         case ISAR_IIS_RDATA:
1043                 ch = sel_bch_isar(isar, isar->iis >> 6);
1044                 if (ch)
1045                         isar_rcv_frame(ch);
1046                 else {
1047                         pr_debug("%s: ISAR spurious IIS_RDATA %x/%x/%x\n",
1048                                  isar->name, isar->iis, isar->cmsb,
1049                                  isar->clsb);
1050                         isar->write_reg(isar->hw, ISAR_IIA, 0);
1051                 }
1052                 break;
1053         case ISAR_IIS_GSTEV:
1054                 isar->write_reg(isar->hw, ISAR_IIA, 0);
1055                 isar->bstat |= isar->cmsb;
1056                 check_send(isar, isar->cmsb);
1057                 break;
1058         case ISAR_IIS_BSTEV:
1059 #ifdef ERROR_STATISTIC
1060                 ch = sel_bch_isar(isar, isar->iis >> 6);
1061                 if (ch) {
1062                         if (isar->cmsb == BSTEV_TBO)
1063                                 ch->bch.err_tx++;
1064                         if (isar->cmsb == BSTEV_RBO)
1065                                 ch->bch.err_rdo++;
1066                 }
1067 #endif
1068                 pr_debug("%s: Buffer STEV dpath%d msb(%x)\n",
1069                          isar->name, isar->iis >> 6, isar->cmsb);
1070                 isar->write_reg(isar->hw, ISAR_IIA, 0);
1071                 break;
1072         case ISAR_IIS_PSTEV:
1073                 ch = sel_bch_isar(isar, isar->iis >> 6);
1074                 if (ch) {
1075                         rcv_mbox(isar, NULL);
1076                         if (ch->bch.state == ISDN_P_B_MODEM_ASYNC)
1077                                 isar_pump_statev_modem(ch, isar->cmsb);
1078                         else if (ch->bch.state == ISDN_P_B_T30_FAX)
1079                                 isar_pump_statev_fax(ch, isar->cmsb);
1080                         else if (ch->bch.state == ISDN_P_B_RAW) {
1081                                 int     tt;
1082                                 tt = isar->cmsb | 0x30;
1083                                 if (tt == 0x3e)
1084                                         tt = '*';
1085                                 else if (tt == 0x3f)
1086                                         tt = '#';
1087                                 else if (tt > '9')
1088                                         tt += 7;
1089                                 tt |= DTMF_TONE_VAL;
1090                                 _queue_data(&ch->bch.ch, PH_CONTROL_IND,
1091                                             MISDN_ID_ANY, sizeof(tt), &tt,
1092                                             GFP_ATOMIC);
1093                         } else
1094                                 pr_debug("%s: ISAR IIS_PSTEV pm %d sta %x\n",
1095                                          isar->name, ch->bch.state,
1096                                          isar->cmsb);
1097                 } else {
1098                         pr_debug("%s: ISAR spurious IIS_PSTEV %x/%x/%x\n",
1099                                  isar->name, isar->iis, isar->cmsb,
1100                                  isar->clsb);
1101                         isar->write_reg(isar->hw, ISAR_IIA, 0);
1102                 }
1103                 break;
1104         case ISAR_IIS_PSTRSP:
1105                 ch = sel_bch_isar(isar, isar->iis >> 6);
1106                 if (ch) {
1107                         rcv_mbox(isar, NULL);
1108                         isar_pump_status_rsp(ch);
1109                 } else {
1110                         pr_debug("%s: ISAR spurious IIS_PSTRSP %x/%x/%x\n",
1111                                  isar->name, isar->iis, isar->cmsb,
1112                                  isar->clsb);
1113                         isar->write_reg(isar->hw, ISAR_IIA, 0);
1114                 }
1115                 break;
1116         case ISAR_IIS_DIAG:
1117         case ISAR_IIS_BSTRSP:
1118         case ISAR_IIS_IOM2RSP:
1119                 rcv_mbox(isar, NULL);
1120                 break;
1121         case ISAR_IIS_INVMSG:
1122                 rcv_mbox(isar, NULL);
1123                 pr_debug("%s: invalid msg his:%x\n", isar->name, isar->cmsb);
1124                 break;
1125         default:
1126                 rcv_mbox(isar, NULL);
1127                 pr_debug("%s: unhandled msg iis(%x) ctrl(%x/%x)\n",
1128                          isar->name, isar->iis, isar->cmsb, isar->clsb);
1129                 break;
1130         }
1131 }
1132 EXPORT_SYMBOL(mISDNisar_irq);
1133
1134 static void
1135 ftimer_handler(struct timer_list *t)
1136 {
1137         struct isar_ch *ch = from_timer(ch, t, ftimer);
1138
1139         pr_debug("%s: ftimer flags %lx\n", ch->is->name, ch->bch.Flags);
1140         test_and_clear_bit(FLG_FTI_RUN, &ch->bch.Flags);
1141         if (test_and_clear_bit(FLG_LL_CONN, &ch->bch.Flags))
1142                 deliver_status(ch, HW_MOD_CONNECT);
1143 }
1144
1145 static void
1146 setup_pump(struct isar_ch *ch) {
1147         u8 dps = SET_DPS(ch->dpath);
1148         u8 ctrl, param[6];
1149
1150         switch (ch->bch.state) {
1151         case ISDN_P_NONE:
1152         case ISDN_P_B_RAW:
1153         case ISDN_P_B_HDLC:
1154                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, PMOD_BYPASS, 0, NULL);
1155                 break;
1156         case ISDN_P_B_L2DTMF:
1157                 if (test_bit(FLG_DTMFSEND, &ch->bch.Flags)) {
1158                         param[0] = 5; /* TOA 5 db */
1159                         send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG,
1160                                   PMOD_DTMF_TRANS, 1, param);
1161                 } else {
1162                         param[0] = 40; /* REL -46 dbm */
1163                         send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG,
1164                                   PMOD_DTMF, 1, param);
1165                 }
1166                 fallthrough;
1167         case ISDN_P_B_MODEM_ASYNC:
1168                 ctrl = PMOD_DATAMODEM;
1169                 if (test_bit(FLG_ORIGIN, &ch->bch.Flags)) {
1170                         ctrl |= PCTRL_ORIG;
1171                         param[5] = PV32P6_CTN;
1172                 } else {
1173                         param[5] = PV32P6_ATN;
1174                 }
1175                 param[0] = 6; /* 6 db */
1176                 param[1] = PV32P2_V23R | PV32P2_V22A | PV32P2_V22B |
1177                         PV32P2_V22C | PV32P2_V21 | PV32P2_BEL;
1178                 param[2] = PV32P3_AMOD | PV32P3_V32B | PV32P3_V23B;
1179                 param[3] = PV32P4_UT144;
1180                 param[4] = PV32P5_UT144;
1181                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, ctrl, 6, param);
1182                 break;
1183         case ISDN_P_B_T30_FAX:
1184                 ctrl = PMOD_FAX;
1185                 if (test_bit(FLG_ORIGIN, &ch->bch.Flags)) {
1186                         ctrl |= PCTRL_ORIG;
1187                         param[1] = PFAXP2_CTN;
1188                 } else {
1189                         param[1] = PFAXP2_ATN;
1190                 }
1191                 param[0] = 6; /* 6 db */
1192                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, ctrl, 2, param);
1193                 ch->state = STFAX_NULL;
1194                 ch->newcmd = 0;
1195                 ch->newmod = 0;
1196                 test_and_set_bit(FLG_FTI_RUN, &ch->bch.Flags);
1197                 break;
1198         }
1199         udelay(1000);
1200         send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL);
1201         udelay(1000);
1202 }
1203
1204 static void
1205 setup_sart(struct isar_ch *ch) {
1206         u8 dps = SET_DPS(ch->dpath);
1207         u8 ctrl, param[2] = {0, 0};
1208
1209         switch (ch->bch.state) {
1210         case ISDN_P_NONE:
1211                 send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, SMODE_DISABLE,
1212                           0, NULL);
1213                 break;
1214         case ISDN_P_B_RAW:
1215         case ISDN_P_B_L2DTMF:
1216                 send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, SMODE_BINARY,
1217                           2, param);
1218                 break;
1219         case ISDN_P_B_HDLC:
1220         case ISDN_P_B_T30_FAX:
1221                 send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, SMODE_HDLC,
1222                           1, param);
1223                 break;
1224         case ISDN_P_B_MODEM_ASYNC:
1225                 ctrl = SMODE_V14 | SCTRL_HDMC_BOTH;
1226                 param[0] = S_P1_CHS_8;
1227                 param[1] = S_P2_BFT_DEF;
1228                 send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, ctrl, 2, param);
1229                 break;
1230         }
1231         udelay(1000);
1232         send_mbox(ch->is, dps | ISAR_HIS_BSTREQ, 0, 0, NULL);
1233         udelay(1000);
1234 }
1235
1236 static void
1237 setup_iom2(struct isar_ch *ch) {
1238         u8 dps = SET_DPS(ch->dpath);
1239         u8 cmsb = IOM_CTRL_ENA, msg[5] = {IOM_P1_TXD, 0, 0, 0, 0};
1240
1241         if (ch->bch.nr == 2) {
1242                 msg[1] = 1;
1243                 msg[3] = 1;
1244         }
1245         switch (ch->bch.state) {
1246         case ISDN_P_NONE:
1247                 cmsb = 0;
1248                 /* dummy slot */
1249                 msg[1] = ch->dpath + 2;
1250                 msg[3] = ch->dpath + 2;
1251                 break;
1252         case ISDN_P_B_RAW:
1253         case ISDN_P_B_HDLC:
1254                 break;
1255         case ISDN_P_B_MODEM_ASYNC:
1256         case ISDN_P_B_T30_FAX:
1257                 cmsb |= IOM_CTRL_RCV;
1258                 fallthrough;
1259         case ISDN_P_B_L2DTMF:
1260                 if (test_bit(FLG_DTMFSEND, &ch->bch.Flags))
1261                         cmsb |= IOM_CTRL_RCV;
1262                 cmsb |= IOM_CTRL_ALAW;
1263                 break;
1264         }
1265         send_mbox(ch->is, dps | ISAR_HIS_IOM2CFG, cmsb, 5, msg);
1266         udelay(1000);
1267         send_mbox(ch->is, dps | ISAR_HIS_IOM2REQ, 0, 0, NULL);
1268         udelay(1000);
1269 }
1270
1271 static int
1272 modeisar(struct isar_ch *ch, u32 bprotocol)
1273 {
1274         /* Here we are selecting the best datapath for requested protocol */
1275         if (ch->bch.state == ISDN_P_NONE) { /* New Setup */
1276                 switch (bprotocol) {
1277                 case ISDN_P_NONE: /* init */
1278                         if (!ch->dpath)
1279                                 /* no init for dpath 0 */
1280                                 return 0;
1281                         test_and_clear_bit(FLG_HDLC, &ch->bch.Flags);
1282                         test_and_clear_bit(FLG_TRANSPARENT, &ch->bch.Flags);
1283                         break;
1284                 case ISDN_P_B_RAW:
1285                 case ISDN_P_B_HDLC:
1286                         /* best is datapath 2 */
1287                         if (!test_and_set_bit(ISAR_DP2_USE, &ch->is->Flags))
1288                                 ch->dpath = 2;
1289                         else if (!test_and_set_bit(ISAR_DP1_USE,
1290                                                    &ch->is->Flags))
1291                                 ch->dpath = 1;
1292                         else {
1293                                 pr_info("modeisar both paths in use\n");
1294                                 return -EBUSY;
1295                         }
1296                         if (bprotocol == ISDN_P_B_HDLC)
1297                                 test_and_set_bit(FLG_HDLC, &ch->bch.Flags);
1298                         else
1299                                 test_and_set_bit(FLG_TRANSPARENT,
1300                                                  &ch->bch.Flags);
1301                         break;
1302                 case ISDN_P_B_MODEM_ASYNC:
1303                 case ISDN_P_B_T30_FAX:
1304                 case ISDN_P_B_L2DTMF:
1305                         /* only datapath 1 */
1306                         if (!test_and_set_bit(ISAR_DP1_USE, &ch->is->Flags))
1307                                 ch->dpath = 1;
1308                         else {
1309                                 pr_info("%s: ISAR modeisar analog functions"
1310                                         "only with DP1\n", ch->is->name);
1311                                 return -EBUSY;
1312                         }
1313                         break;
1314                 default:
1315                         pr_info("%s: protocol not known %x\n", ch->is->name,
1316                                 bprotocol);
1317                         return -ENOPROTOOPT;
1318                 }
1319         }
1320         pr_debug("%s: ISAR ch%d dp%d protocol %x->%x\n", ch->is->name,
1321                  ch->bch.nr, ch->dpath, ch->bch.state, bprotocol);
1322         ch->bch.state = bprotocol;
1323         setup_pump(ch);
1324         setup_iom2(ch);
1325         setup_sart(ch);
1326         if (ch->bch.state == ISDN_P_NONE) {
1327                 /* Clear resources */
1328                 if (ch->dpath == 1)
1329                         test_and_clear_bit(ISAR_DP1_USE, &ch->is->Flags);
1330                 else if (ch->dpath == 2)
1331                         test_and_clear_bit(ISAR_DP2_USE, &ch->is->Flags);
1332                 ch->dpath = 0;
1333                 ch->is->ctrl(ch->is->hw, HW_DEACT_IND, ch->bch.nr);
1334         } else
1335                 ch->is->ctrl(ch->is->hw, HW_ACTIVATE_IND, ch->bch.nr);
1336         return 0;
1337 }
1338
1339 static void
1340 isar_pump_cmd(struct isar_ch *ch, u32 cmd, u8 para)
1341 {
1342         u8 dps = SET_DPS(ch->dpath);
1343         u8 ctrl = 0, nom = 0, p1 = 0;
1344
1345         pr_debug("%s: isar_pump_cmd %x/%x state(%x)\n",
1346                  ch->is->name, cmd, para, ch->bch.state);
1347         switch (cmd) {
1348         case HW_MOD_FTM:
1349                 if (ch->state == STFAX_READY) {
1350                         p1 = para;
1351                         ctrl = PCTRL_CMD_FTM;
1352                         nom = 1;
1353                         ch->state = STFAX_LINE;
1354                         ch->cmd = ctrl;
1355                         ch->mod = para;
1356                         ch->newmod = 0;
1357                         ch->newcmd = 0;
1358                         ch->try_mod = 3;
1359                 } else if ((ch->state == STFAX_ACTIV) &&
1360                            (ch->cmd == PCTRL_CMD_FTM) && (ch->mod == para))
1361                         deliver_status(ch, HW_MOD_CONNECT);
1362                 else {
1363                         ch->newmod = para;
1364                         ch->newcmd = PCTRL_CMD_FTM;
1365                         nom = 0;
1366                         ctrl = PCTRL_CMD_ESC;
1367                         ch->state = STFAX_ESCAPE;
1368                 }
1369                 break;
1370         case HW_MOD_FTH:
1371                 if (ch->state == STFAX_READY) {
1372                         p1 = para;
1373                         ctrl = PCTRL_CMD_FTH;
1374                         nom = 1;
1375                         ch->state = STFAX_LINE;
1376                         ch->cmd = ctrl;
1377                         ch->mod = para;
1378                         ch->newmod = 0;
1379                         ch->newcmd = 0;
1380                         ch->try_mod = 3;
1381                 } else if ((ch->state == STFAX_ACTIV) &&
1382                            (ch->cmd == PCTRL_CMD_FTH) && (ch->mod == para))
1383                         deliver_status(ch, HW_MOD_CONNECT);
1384                 else {
1385                         ch->newmod = para;
1386                         ch->newcmd = PCTRL_CMD_FTH;
1387                         nom = 0;
1388                         ctrl = PCTRL_CMD_ESC;
1389                         ch->state = STFAX_ESCAPE;
1390                 }
1391                 break;
1392         case HW_MOD_FRM:
1393                 if (ch->state == STFAX_READY) {
1394                         p1 = para;
1395                         ctrl = PCTRL_CMD_FRM;
1396                         nom = 1;
1397                         ch->state = STFAX_LINE;
1398                         ch->cmd = ctrl;
1399                         ch->mod = para;
1400                         ch->newmod = 0;
1401                         ch->newcmd = 0;
1402                         ch->try_mod = 3;
1403                 } else if ((ch->state == STFAX_ACTIV) &&
1404                            (ch->cmd == PCTRL_CMD_FRM) && (ch->mod == para))
1405                         deliver_status(ch, HW_MOD_CONNECT);
1406                 else {
1407                         ch->newmod = para;
1408                         ch->newcmd = PCTRL_CMD_FRM;
1409                         nom = 0;
1410                         ctrl = PCTRL_CMD_ESC;
1411                         ch->state = STFAX_ESCAPE;
1412                 }
1413                 break;
1414         case HW_MOD_FRH:
1415                 if (ch->state == STFAX_READY) {
1416                         p1 = para;
1417                         ctrl = PCTRL_CMD_FRH;
1418                         nom = 1;
1419                         ch->state = STFAX_LINE;
1420                         ch->cmd = ctrl;
1421                         ch->mod = para;
1422                         ch->newmod = 0;
1423                         ch->newcmd = 0;
1424                         ch->try_mod = 3;
1425                 } else if ((ch->state == STFAX_ACTIV) &&
1426                            (ch->cmd == PCTRL_CMD_FRH) && (ch->mod == para))
1427                         deliver_status(ch, HW_MOD_CONNECT);
1428                 else {
1429                         ch->newmod = para;
1430                         ch->newcmd = PCTRL_CMD_FRH;
1431                         nom = 0;
1432                         ctrl = PCTRL_CMD_ESC;
1433                         ch->state = STFAX_ESCAPE;
1434                 }
1435                 break;
1436         case PCTRL_CMD_TDTMF:
1437                 p1 = para;
1438                 nom = 1;
1439                 ctrl = PCTRL_CMD_TDTMF;
1440                 break;
1441         }
1442         if (ctrl)
1443                 send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, ctrl, nom, &p1);
1444 }
1445
1446 static void
1447 isar_setup(struct isar_hw *isar)
1448 {
1449         u8 msg;
1450         int i;
1451
1452         /* Dpath 1, 2 */
1453         msg = 61;
1454         for (i = 0; i < 2; i++) {
1455                 /* Buffer Config */
1456                 send_mbox(isar, (i ? ISAR_HIS_DPS2 : ISAR_HIS_DPS1) |
1457                           ISAR_HIS_P12CFG, 4, 1, &msg);
1458                 isar->ch[i].mml = msg;
1459                 isar->ch[i].bch.state = 0;
1460                 isar->ch[i].dpath = i + 1;
1461                 modeisar(&isar->ch[i], ISDN_P_NONE);
1462         }
1463 }
1464
1465 static int
1466 isar_l2l1(struct mISDNchannel *ch, struct sk_buff *skb)
1467 {
1468         struct bchannel *bch = container_of(ch, struct bchannel, ch);
1469         struct isar_ch *ich = container_of(bch, struct isar_ch, bch);
1470         int ret = -EINVAL;
1471         struct mISDNhead *hh = mISDN_HEAD_P(skb);
1472         u32 id, *val;
1473         u_long flags;
1474
1475         switch (hh->prim) {
1476         case PH_DATA_REQ:
1477                 spin_lock_irqsave(ich->is->hwlock, flags);
1478                 ret = bchannel_senddata(bch, skb);
1479                 if (ret > 0) { /* direct TX */
1480                         ret = 0;
1481                         isar_fill_fifo(ich);
1482                 }
1483                 spin_unlock_irqrestore(ich->is->hwlock, flags);
1484                 return ret;
1485         case PH_ACTIVATE_REQ:
1486                 spin_lock_irqsave(ich->is->hwlock, flags);
1487                 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags))
1488                         ret = modeisar(ich, ch->protocol);
1489                 else
1490                         ret = 0;
1491                 spin_unlock_irqrestore(ich->is->hwlock, flags);
1492                 if (!ret)
1493                         _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
1494                                     NULL, GFP_KERNEL);
1495                 break;
1496         case PH_DEACTIVATE_REQ:
1497                 spin_lock_irqsave(ich->is->hwlock, flags);
1498                 mISDN_clear_bchannel(bch);
1499                 modeisar(ich, ISDN_P_NONE);
1500                 spin_unlock_irqrestore(ich->is->hwlock, flags);
1501                 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
1502                             NULL, GFP_KERNEL);
1503                 ret = 0;
1504                 break;
1505         case PH_CONTROL_REQ:
1506                 val = (u32 *)skb->data;
1507                 pr_debug("%s: PH_CONTROL | REQUEST %x/%x\n", ich->is->name,
1508                          hh->id, *val);
1509                 if ((hh->id == 0) && ((*val & ~DTMF_TONE_MASK) ==
1510                                       DTMF_TONE_VAL)) {
1511                         if (bch->state == ISDN_P_B_L2DTMF) {
1512                                 char tt = *val & DTMF_TONE_MASK;
1513
1514                                 if (tt == '*')
1515                                         tt = 0x1e;
1516                                 else if (tt == '#')
1517                                         tt = 0x1f;
1518                                 else if (tt > '9')
1519                                         tt -= 7;
1520                                 tt &= 0x1f;
1521                                 spin_lock_irqsave(ich->is->hwlock, flags);
1522                                 isar_pump_cmd(ich, PCTRL_CMD_TDTMF, tt);
1523                                 spin_unlock_irqrestore(ich->is->hwlock, flags);
1524                         } else {
1525                                 pr_info("%s: DTMF send wrong protocol %x\n",
1526                                         __func__, bch->state);
1527                                 return -EINVAL;
1528                         }
1529                 } else if ((hh->id == HW_MOD_FRM) || (hh->id == HW_MOD_FRH) ||
1530                            (hh->id == HW_MOD_FTM) || (hh->id == HW_MOD_FTH)) {
1531                         for (id = 0; id < FAXMODCNT; id++)
1532                                 if (faxmodulation[id] == *val)
1533                                         break;
1534                         if ((FAXMODCNT > id) &&
1535                             test_bit(FLG_INITIALIZED, &bch->Flags)) {
1536                                 pr_debug("%s: isar: new mod\n", ich->is->name);
1537                                 isar_pump_cmd(ich, hh->id, *val);
1538                                 ret = 0;
1539                         } else {
1540                                 pr_info("%s: wrong modulation\n",
1541                                         ich->is->name);
1542                                 ret = -EINVAL;
1543                         }
1544                 } else if (hh->id == HW_MOD_LASTDATA)
1545                         test_and_set_bit(FLG_DLEETX, &bch->Flags);
1546                 else {
1547                         pr_info("%s: unknown PH_CONTROL_REQ %x\n",
1548                                 ich->is->name, hh->id);
1549                         ret = -EINVAL;
1550                 }
1551                 fallthrough;
1552         default:
1553                 pr_info("%s: %s unknown prim(%x,%x)\n",
1554                         ich->is->name, __func__, hh->prim, hh->id);
1555                 ret = -EINVAL;
1556         }
1557         if (!ret)
1558                 dev_kfree_skb(skb);
1559         return ret;
1560 }
1561
1562 static int
1563 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
1564 {
1565         return mISDN_ctrl_bchannel(bch, cq);
1566 }
1567
1568 static int
1569 isar_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
1570 {
1571         struct bchannel *bch = container_of(ch, struct bchannel, ch);
1572         struct isar_ch *ich = container_of(bch, struct isar_ch, bch);
1573         int ret = -EINVAL;
1574         u_long flags;
1575
1576         pr_debug("%s: %s cmd:%x %p\n", ich->is->name, __func__, cmd, arg);
1577         switch (cmd) {
1578         case CLOSE_CHANNEL:
1579                 test_and_clear_bit(FLG_OPEN, &bch->Flags);
1580                 cancel_work_sync(&bch->workq);
1581                 spin_lock_irqsave(ich->is->hwlock, flags);
1582                 mISDN_clear_bchannel(bch);
1583                 modeisar(ich, ISDN_P_NONE);
1584                 spin_unlock_irqrestore(ich->is->hwlock, flags);
1585                 ch->protocol = ISDN_P_NONE;
1586                 ch->peer = NULL;
1587                 module_put(ich->is->owner);
1588                 ret = 0;
1589                 break;
1590         case CONTROL_CHANNEL:
1591                 ret = channel_bctrl(bch, arg);
1592                 break;
1593         default:
1594                 pr_info("%s: %s unknown prim(%x)\n",
1595                         ich->is->name, __func__, cmd);
1596         }
1597         return ret;
1598 }
1599
1600 static void
1601 free_isar(struct isar_hw *isar)
1602 {
1603         modeisar(&isar->ch[0], ISDN_P_NONE);
1604         modeisar(&isar->ch[1], ISDN_P_NONE);
1605         del_timer(&isar->ch[0].ftimer);
1606         del_timer(&isar->ch[1].ftimer);
1607         test_and_clear_bit(FLG_INITIALIZED, &isar->ch[0].bch.Flags);
1608         test_and_clear_bit(FLG_INITIALIZED, &isar->ch[1].bch.Flags);
1609 }
1610
1611 static int
1612 init_isar(struct isar_hw *isar)
1613 {
1614         int     cnt = 3;
1615
1616         while (cnt--) {
1617                 isar->version = ISARVersion(isar);
1618                 if (isar->ch[0].bch.debug & DEBUG_HW)
1619                         pr_notice("%s: Testing version %d (%d time)\n",
1620                                   isar->name, isar->version, 3 - cnt);
1621                 if (isar->version == 1)
1622                         break;
1623                 isar->ctrl(isar->hw, HW_RESET_REQ, 0);
1624         }
1625         if (isar->version != 1)
1626                 return -EINVAL;
1627         timer_setup(&isar->ch[0].ftimer, ftimer_handler, 0);
1628         test_and_set_bit(FLG_INITIALIZED, &isar->ch[0].bch.Flags);
1629         timer_setup(&isar->ch[1].ftimer, ftimer_handler, 0);
1630         test_and_set_bit(FLG_INITIALIZED, &isar->ch[1].bch.Flags);
1631         return 0;
1632 }
1633
1634 static int
1635 isar_open(struct isar_hw *isar, struct channel_req *rq)
1636 {
1637         struct bchannel         *bch;
1638
1639         if (rq->adr.channel == 0 || rq->adr.channel > 2)
1640                 return -EINVAL;
1641         if (rq->protocol == ISDN_P_NONE)
1642                 return -EINVAL;
1643         bch = &isar->ch[rq->adr.channel - 1].bch;
1644         if (test_and_set_bit(FLG_OPEN, &bch->Flags))
1645                 return -EBUSY; /* b-channel can be only open once */
1646         bch->ch.protocol = rq->protocol;
1647         rq->ch = &bch->ch;
1648         return 0;
1649 }
1650
1651 u32
1652 mISDNisar_init(struct isar_hw *isar, void *hw)
1653 {
1654         u32 ret, i;
1655
1656         isar->hw = hw;
1657         for (i = 0; i < 2; i++) {
1658                 isar->ch[i].bch.nr = i + 1;
1659                 mISDN_initbchannel(&isar->ch[i].bch, MAX_DATA_MEM, 32);
1660                 isar->ch[i].bch.ch.nr = i + 1;
1661                 isar->ch[i].bch.ch.send = &isar_l2l1;
1662                 isar->ch[i].bch.ch.ctrl = isar_bctrl;
1663                 isar->ch[i].bch.hw = hw;
1664                 isar->ch[i].is = isar;
1665         }
1666
1667         isar->init = &init_isar;
1668         isar->release = &free_isar;
1669         isar->firmware = &load_firmware;
1670         isar->open = &isar_open;
1671
1672         ret =   (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
1673                 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)) |
1674                 (1 << (ISDN_P_B_L2DTMF & ISDN_P_B_MASK)) |
1675                 (1 << (ISDN_P_B_MODEM_ASYNC & ISDN_P_B_MASK)) |
1676                 (1 << (ISDN_P_B_T30_FAX & ISDN_P_B_MASK));
1677
1678         return ret;
1679 }
1680 EXPORT_SYMBOL(mISDNisar_init);
1681
1682 static int __init isar_mod_init(void)
1683 {
1684         pr_notice("mISDN: ISAR driver Rev. %s\n", ISAR_REV);
1685         return 0;
1686 }
1687
1688 static void __exit isar_mod_cleanup(void)
1689 {
1690         pr_notice("mISDN: ISAR module unloaded\n");
1691 }
1692 module_init(isar_mod_init);
1693 module_exit(isar_mod_cleanup);