kernel/drivers/isdn/hisax/isac.c

   1 /* $Id: isac.c,v 1.31.2.3 2004/01/13 14:31:25 keil Exp $
   2  *
   3  * ISAC specific routines
   4  *
   5  * Author       Karsten Keil
   6  * Copyright    by Karsten Keil      <keil@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  * For changes and modifications please read
  12  * Documentation/isdn/HiSax.cert
  13  *
  14  */
  15
  16 #include "hisax.h"
  17 #include "isac.h"
  18 #include "arcofi.h"
  19 #include "isdnl1.h"
  20 #include <linux/interrupt.h>
  21 #include <linux/slab.h>
  22 #include <linux/init.h>
  23
  24 #define DBUSY_TIMER_VALUE 80
  25 #define ARCOFI_USE 1
  26
  27 static char *ISACVer[] =
  28 {"2086/2186 V1.1", "2085 B1", "2085 B2",
  29  "2085 V2.3"};
  30
  31 void ISACVersion(struct IsdnCardState *cs, char *s)
  32 {
  33         int val;
  34
  35         val = cs->readisac(cs, ISAC_RBCH);
  36         printk(KERN_INFO "%s ISAC version (%x): %s\n", s, val, ISACVer[(val >> 5) & 3]);
  37 }
  38
  39 static void
  40 ph_command(struct IsdnCardState *cs, unsigned int command)
  41 {
  42         if (cs->debug & L1_DEB_ISAC)
  43                 debugl1(cs, "ph_command %x", command);
  44         cs->writeisac(cs, ISAC_CIX0, (command << 2) | 3);
  45 }
  46
  47
  48 static void
  49 isac_new_ph(struct IsdnCardState *cs)
  50 {
  51         switch (cs->dc.isac.ph_state) {
  52         case (ISAC_IND_RS):
  53         case (ISAC_IND_EI):
  54                 ph_command(cs, ISAC_CMD_DUI);
  55                 l1_msg(cs, HW_RESET | INDICATION, NULL);
  56                 break;
  57         case (ISAC_IND_DID):
  58                 l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
  59                 break;
  60         case (ISAC_IND_DR):
  61                 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
  62                 break;
  63         case (ISAC_IND_PU):
  64                 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
  65                 break;
  66         case (ISAC_IND_RSY):
  67                 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
  68                 break;
  69         case (ISAC_IND_ARD):
  70                 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
  71                 break;
  72         case (ISAC_IND_AI8):
  73                 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
  74                 break;
  75         case (ISAC_IND_AI10):
  76                 l1_msg(cs, HW_INFO4_P10 | INDICATION, NULL);
  77                 break;
  78         default:
  79                 break;
  80         }
  81 }
  82
  83 static void
  84 isac_bh(struct work_struct *work)
  85 {
  86         struct IsdnCardState *cs =
  87                 container_of(work, struct IsdnCardState, tqueue);
  88         struct PStack *stptr;
  89
  90         if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
  91                 if (cs->debug)
  92                         debugl1(cs, "D-Channel Busy cleared");
  93                 stptr = cs->stlist;
  94                 while (stptr != NULL) {
  95                         stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
  96                         stptr = stptr->next;
  97                 }
  98         }
  99         if (test_and_clear_bit(D_L1STATECHANGE, &cs->event))
 100                 isac_new_ph(cs);
 101         if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
 102                 DChannel_proc_rcv(cs);
 103         if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
 104                 DChannel_proc_xmt(cs);
 105 #if ARCOFI_USE
 106         if (!test_bit(HW_ARCOFI, &cs->HW_Flags))
 107                 return;
 108         if (test_and_clear_bit(D_RX_MON1, &cs->event))
 109                 arcofi_fsm(cs, ARCOFI_RX_END, NULL);
 110         if (test_and_clear_bit(D_TX_MON1, &cs->event))
 111                 arcofi_fsm(cs, ARCOFI_TX_END, NULL);
 112 #endif
 113 }
 114
 115 static void
 116 isac_empty_fifo(struct IsdnCardState *cs, int count)
 117 {
 118         u_char *ptr;
 119
 120         if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
 121                 debugl1(cs, "isac_empty_fifo");
 122
 123         if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
 124                 if (cs->debug & L1_DEB_WARN)
 125                         debugl1(cs, "isac_empty_fifo overrun %d",
 126                                 cs->rcvidx + count);
 127                 cs->writeisac(cs, ISAC_CMDR, 0x80);
 128                 cs->rcvidx = 0;
 129                 return;
 130         }
 131         ptr = cs->rcvbuf + cs->rcvidx;
 132         cs->rcvidx += count;
 133         cs->readisacfifo(cs, ptr, count);
 134         cs->writeisac(cs, ISAC_CMDR, 0x80);
 135         if (cs->debug & L1_DEB_ISAC_FIFO) {
 136                 char *t = cs->dlog;
 137
 138                 t += sprintf(t, "isac_empty_fifo cnt %d", count);
 139                 QuickHex(t, ptr, count);
 140                 debugl1(cs, "%s", cs->dlog);
 141         }
 142 }
 143
 144 static void
 145 isac_fill_fifo(struct IsdnCardState *cs)
 146 {
 147         int count, more;
 148         u_char *ptr;
 149
 150         if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
 151                 debugl1(cs, "isac_fill_fifo");
 152
 153         if (!cs->tx_skb)
 154                 return;
 155
 156         count = cs->tx_skb->len;
 157         if (count <= 0)
 158                 return;
 159
 160         more = 0;
 161         if (count > 32) {
 162                 more = !0;
 163                 count = 32;
 164         }
 165         ptr = cs->tx_skb->data;
 166         skb_pull(cs->tx_skb, count);
 167         cs->tx_cnt += count;
 168         cs->writeisacfifo(cs, ptr, count);
 169         cs->writeisac(cs, ISAC_CMDR, more ? 0x8 : 0xa);
 170         if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
 171                 debugl1(cs, "isac_fill_fifo dbusytimer running");
 172                 del_timer(&cs->dbusytimer);
 173         }
 174         init_timer(&cs->dbusytimer);
 175         cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
 176         add_timer(&cs->dbusytimer);
 177         if (cs->debug & L1_DEB_ISAC_FIFO) {
 178                 char *t = cs->dlog;
 179
 180                 t += sprintf(t, "isac_fill_fifo cnt %d", count);
 181                 QuickHex(t, ptr, count);
 182                 debugl1(cs, "%s", cs->dlog);
 183         }
 184 }
 185
 186 void
 187 isac_interrupt(struct IsdnCardState *cs, u_char val)
 188 {
 189         u_char exval, v1;
 190         struct sk_buff *skb;
 191         unsigned int count;
 192
 193         if (cs->debug & L1_DEB_ISAC)
 194                 debugl1(cs, "ISAC interrupt %x", val);
 195         if (val & 0x80) {       /* RME */
 196                 exval = cs->readisac(cs, ISAC_RSTA);
 197                 if ((exval & 0x70) != 0x20) {
 198                         if (exval & 0x40) {
 199                                 if (cs->debug & L1_DEB_WARN)
 200                                         debugl1(cs, "ISAC RDO");
 201 #ifdef ERROR_STATISTIC
 202                                 cs->err_rx++;
 203 #endif
 204                         }
 205                         if (!(exval & 0x20)) {
 206                                 if (cs->debug & L1_DEB_WARN)
 207                                         debugl1(cs, "ISAC CRC error");
 208 #ifdef ERROR_STATISTIC
 209                                 cs->err_crc++;
 210 #endif
 211                         }
 212                         cs->writeisac(cs, ISAC_CMDR, 0x80);
 213                 } else {
 214                         count = cs->readisac(cs, ISAC_RBCL) & 0x1f;
 215                         if (count == 0)
 216                                 count = 32;
 217                         isac_empty_fifo(cs, count);
 218                         if ((count = cs->rcvidx) > 0) {
 219                                 cs->rcvidx = 0;
 220                                 if (!(skb = alloc_skb(count, GFP_ATOMIC)))
 221                                         printk(KERN_WARNING "HiSax: D receive out of memory\n");
 222                                 else {
 223                                         memcpy(skb_put(skb, count), cs->rcvbuf, count);
 224                                         skb_queue_tail(&cs->rq, skb);
 225                                 }
 226                         }
 227                 }
 228                 cs->rcvidx = 0;
 229                 schedule_event(cs, D_RCVBUFREADY);
 230         }
 231         if (val & 0x40) {       /* RPF */
 232                 isac_empty_fifo(cs, 32);
 233         }
 234         if (val & 0x20) {       /* RSC */
 235                 /* never */
 236                 if (cs->debug & L1_DEB_WARN)
 237                         debugl1(cs, "ISAC RSC interrupt");
 238         }
 239         if (val & 0x10) {       /* XPR */
 240                 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 241                         del_timer(&cs->dbusytimer);
 242                 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 243                         schedule_event(cs, D_CLEARBUSY);
 244                 if (cs->tx_skb) {
 245                         if (cs->tx_skb->len) {
 246                                 isac_fill_fifo(cs);
 247                                 goto afterXPR;
 248                         } else {
 249                                 dev_kfree_skb_irq(cs->tx_skb);
 250                                 cs->tx_cnt = 0;
 251                                 cs->tx_skb = NULL;
 252                         }
 253                 }
 254                 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
 255                         cs->tx_cnt = 0;
 256                         isac_fill_fifo(cs);
 257                 } else
 258                         schedule_event(cs, D_XMTBUFREADY);
 259         }
 260 afterXPR:
 261         if (val & 0x04) {       /* CISQ */
 262                 exval = cs->readisac(cs, ISAC_CIR0);
 263                 if (cs->debug & L1_DEB_ISAC)
 264                         debugl1(cs, "ISAC CIR0 %02X", exval);
 265                 if (exval & 2) {
 266                         cs->dc.isac.ph_state = (exval >> 2) & 0xf;
 267                         if (cs->debug & L1_DEB_ISAC)
 268                                 debugl1(cs, "ph_state change %x", cs->dc.isac.ph_state);
 269                         schedule_event(cs, D_L1STATECHANGE);
 270                 }
 271                 if (exval & 1) {
 272                         exval = cs->readisac(cs, ISAC_CIR1);
 273                         if (cs->debug & L1_DEB_ISAC)
 274                                 debugl1(cs, "ISAC CIR1 %02X", exval);
 275                 }
 276         }
 277         if (val & 0x02) {       /* SIN */
 278                 /* never */
 279                 if (cs->debug & L1_DEB_WARN)
 280                         debugl1(cs, "ISAC SIN interrupt");
 281         }
 282         if (val & 0x01) {       /* EXI */
 283                 exval = cs->readisac(cs, ISAC_EXIR);
 284                 if (cs->debug & L1_DEB_WARN)
 285                         debugl1(cs, "ISAC EXIR %02x", exval);
 286                 if (exval & 0x80) {  /* XMR */
 287                         debugl1(cs, "ISAC XMR");
 288                         printk(KERN_WARNING "HiSax: ISAC XMR\n");
 289                 }
 290                 if (exval & 0x40) {  /* XDU */
 291                         debugl1(cs, "ISAC XDU");
 292                         printk(KERN_WARNING "HiSax: ISAC XDU\n");
 293 #ifdef ERROR_STATISTIC
 294                         cs->err_tx++;
 295 #endif
 296                         if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 297                                 del_timer(&cs->dbusytimer);
 298                         if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 299                                 schedule_event(cs, D_CLEARBUSY);
 300                         if (cs->tx_skb) { /* Restart frame */
 301                                 skb_push(cs->tx_skb, cs->tx_cnt);
 302                                 cs->tx_cnt = 0;
 303                                 isac_fill_fifo(cs);
 304                         } else {
 305                                 printk(KERN_WARNING "HiSax: ISAC XDU no skb\n");
 306                                 debugl1(cs, "ISAC XDU no skb");
 307                         }
 308                 }
 309                 if (exval & 0x04) {  /* MOS */
 310                         v1 = cs->readisac(cs, ISAC_MOSR);
 311                         if (cs->debug & L1_DEB_MONITOR)
 312                                 debugl1(cs, "ISAC MOSR %02x", v1);
 313 #if ARCOFI_USE
 314                         if (v1 & 0x08) {
 315                                 if (!cs->dc.isac.mon_rx) {
 316                                         if (!(cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
 317                                                 if (cs->debug & L1_DEB_WARN)
 318                                                         debugl1(cs, "ISAC MON RX out of memory!");
 319                                                 cs->dc.isac.mocr &= 0xf0;
 320                                                 cs->dc.isac.mocr |= 0x0a;
 321                                                 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 322                                                 goto afterMONR0;
 323                                         } else
 324                                                 cs->dc.isac.mon_rxp = 0;
 325                                 }
 326                                 if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
 327                                         cs->dc.isac.mocr &= 0xf0;
 328                                         cs->dc.isac.mocr |= 0x0a;
 329                                         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 330                                         cs->dc.isac.mon_rxp = 0;
 331                                         if (cs->debug & L1_DEB_WARN)
 332                                                 debugl1(cs, "ISAC MON RX overflow!");
 333                                         goto afterMONR0;
 334                                 }
 335                                 cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR0);
 336                                 if (cs->debug & L1_DEB_MONITOR)
 337                                         debugl1(cs, "ISAC MOR0 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp - 1]);
 338                                 if (cs->dc.isac.mon_rxp == 1) {
 339                                         cs->dc.isac.mocr |= 0x04;
 340                                         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 341                                 }
 342                         }
 343                 afterMONR0:
 344                         if (v1 & 0x80) {
 345                                 if (!cs->dc.isac.mon_rx) {
 346                                         if (!(cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
 347                                                 if (cs->debug & L1_DEB_WARN)
 348                                                         debugl1(cs, "ISAC MON RX out of memory!");
 349                                                 cs->dc.isac.mocr &= 0x0f;
 350                                                 cs->dc.isac.mocr |= 0xa0;
 351                                                 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 352                                                 goto afterMONR1;
 353                                         } else
 354                                                 cs->dc.isac.mon_rxp = 0;
 355                                 }
 356                                 if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
 357                                         cs->dc.isac.mocr &= 0x0f;
 358                                         cs->dc.isac.mocr |= 0xa0;
 359                                         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 360                                         cs->dc.isac.mon_rxp = 0;
 361                                         if (cs->debug & L1_DEB_WARN)
 362                                                 debugl1(cs, "ISAC MON RX overflow!");
 363                                         goto afterMONR1;
 364                                 }
 365                                 cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR1);
 366                                 if (cs->debug & L1_DEB_MONITOR)
 367                                         debugl1(cs, "ISAC MOR1 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp - 1]);
 368                                 cs->dc.isac.mocr |= 0x40;
 369                                 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 370                         }
 371                 afterMONR1:
 372                         if (v1 & 0x04) {
 373                                 cs->dc.isac.mocr &= 0xf0;
 374                                 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 375                                 cs->dc.isac.mocr |= 0x0a;
 376                                 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 377                                 schedule_event(cs, D_RX_MON0);
 378                         }
 379                         if (v1 & 0x40) {
 380                                 cs->dc.isac.mocr &= 0x0f;
 381                                 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 382                                 cs->dc.isac.mocr |= 0xa0;
 383                                 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 384                                 schedule_event(cs, D_RX_MON1);
 385                         }
 386                         if (v1 & 0x02) {
 387                                 if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
 388                                                               (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
 389                                                               !(v1 & 0x08))) {
 390                                         cs->dc.isac.mocr &= 0xf0;
 391                                         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 392                                         cs->dc.isac.mocr |= 0x0a;
 393                                         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 394                                         if (cs->dc.isac.mon_txc &&
 395                                             (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
 396                                                 schedule_event(cs, D_TX_MON0);
 397                                         goto AfterMOX0;
 398                                 }
 399                                 if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
 400                                         schedule_event(cs, D_TX_MON0);
 401                                         goto AfterMOX0;
 402                                 }
 403                                 cs->writeisac(cs, ISAC_MOX0,
 404                                               cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
 405                                 if (cs->debug & L1_DEB_MONITOR)
 406                                         debugl1(cs, "ISAC %02x -> MOX0", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp - 1]);
 407                         }
 408                 AfterMOX0:
 409                         if (v1 & 0x20) {
 410                                 if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
 411                                                               (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
 412                                                               !(v1 & 0x80))) {
 413                                         cs->dc.isac.mocr &= 0x0f;
 414                                         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 415                                         cs->dc.isac.mocr |= 0xa0;
 416                                         cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
 417                                         if (cs->dc.isac.mon_txc &&
 418                                             (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
 419                                                 schedule_event(cs, D_TX_MON1);
 420                                         goto AfterMOX1;
 421                                 }
 422                                 if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
 423                                         schedule_event(cs, D_TX_MON1);
 424                                         goto AfterMOX1;
 425                                 }
 426                                 cs->writeisac(cs, ISAC_MOX1,
 427                                               cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
 428                                 if (cs->debug & L1_DEB_MONITOR)
 429                                         debugl1(cs, "ISAC %02x -> MOX1", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp - 1]);
 430                         }
 431                 AfterMOX1:;
 432 #endif
 433                 }
 434         }
 435 }
 436
 437 static void
 438 ISAC_l1hw(struct PStack *st, int pr, void *arg)
 439 {
 440         struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
 441         struct sk_buff *skb = arg;
 442         u_long flags;
 443         int  val;
 444
 445         switch (pr) {
 446         case (PH_DATA | REQUEST):
 447                 if (cs->debug & DEB_DLOG_HEX)
 448                         LogFrame(cs, skb->data, skb->len);
 449                 if (cs->debug & DEB_DLOG_VERBOSE)
 450                         dlogframe(cs, skb, 0);
 451                 spin_lock_irqsave(&cs->lock, flags);
 452                 if (cs->tx_skb) {
 453                         skb_queue_tail(&cs->sq, skb);
 454 #ifdef L2FRAME_DEBUG            /* psa */
 455                         if (cs->debug & L1_DEB_LAPD)
 456                                 Logl2Frame(cs, skb, "PH_DATA Queued", 0);
 457 #endif
 458                 } else {
 459                         cs->tx_skb = skb;
 460                         cs->tx_cnt = 0;
 461 #ifdef L2FRAME_DEBUG            /* psa */
 462                         if (cs->debug & L1_DEB_LAPD)
 463                                 Logl2Frame(cs, skb, "PH_DATA", 0);
 464 #endif
 465                         isac_fill_fifo(cs);
 466                 }
 467                 spin_unlock_irqrestore(&cs->lock, flags);
 468                 break;
 469         case (PH_PULL | INDICATION):
 470                 spin_lock_irqsave(&cs->lock, flags);
 471                 if (cs->tx_skb) {
 472                         if (cs->debug & L1_DEB_WARN)
 473                                 debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
 474                         skb_queue_tail(&cs->sq, skb);
 475                 } else {
 476                         if (cs->debug & DEB_DLOG_HEX)
 477                                 LogFrame(cs, skb->data, skb->len);
 478                         if (cs->debug & DEB_DLOG_VERBOSE)
 479                                 dlogframe(cs, skb, 0);
 480                         cs->tx_skb = skb;
 481                         cs->tx_cnt = 0;
 482 #ifdef L2FRAME_DEBUG            /* psa */
 483                         if (cs->debug & L1_DEB_LAPD)
 484                                 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
 485 #endif
 486                         isac_fill_fifo(cs);
 487                 }
 488                 spin_unlock_irqrestore(&cs->lock, flags);
 489                 break;
 490         case (PH_PULL | REQUEST):
 491 #ifdef L2FRAME_DEBUG            /* psa */
 492                 if (cs->debug & L1_DEB_LAPD)
 493                         debugl1(cs, "-> PH_REQUEST_PULL");
 494 #endif
 495                 if (!cs->tx_skb) {
 496                         test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 497                         st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
 498                 } else
 499                         test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 500                 break;
 501         case (HW_RESET | REQUEST):
 502                 spin_lock_irqsave(&cs->lock, flags);
 503                 if ((cs->dc.isac.ph_state == ISAC_IND_EI) ||
 504                     (cs->dc.isac.ph_state == ISAC_IND_DR) ||
 505                     (cs->dc.isac.ph_state == ISAC_IND_RS))
 506                         ph_command(cs, ISAC_CMD_TIM);
 507                 else
 508                         ph_command(cs, ISAC_CMD_RS);
 509                 spin_unlock_irqrestore(&cs->lock, flags);
 510                 break;
 511         case (HW_ENABLE | REQUEST):
 512                 spin_lock_irqsave(&cs->lock, flags);
 513                 ph_command(cs, ISAC_CMD_TIM);
 514                 spin_unlock_irqrestore(&cs->lock, flags);
 515                 break;
 516         case (HW_INFO3 | REQUEST):
 517                 spin_lock_irqsave(&cs->lock, flags);
 518                 ph_command(cs, ISAC_CMD_AR8);
 519                 spin_unlock_irqrestore(&cs->lock, flags);
 520                 break;
 521         case (HW_TESTLOOP | REQUEST):
 522                 spin_lock_irqsave(&cs->lock, flags);
 523                 val = 0;
 524                 if (1 & (long) arg)
 525                         val |= 0x0c;
 526                 if (2 & (long) arg)
 527                         val |= 0x3;
 528                 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
 529                         /* IOM 1 Mode */
 530                         if (!val) {
 531                                 cs->writeisac(cs, ISAC_SPCR, 0xa);
 532                                 cs->writeisac(cs, ISAC_ADF1, 0x2);
 533                         } else {
 534                                 cs->writeisac(cs, ISAC_SPCR, val);
 535                                 cs->writeisac(cs, ISAC_ADF1, 0xa);
 536                         }
 537                 } else {
 538                         /* IOM 2 Mode */
 539                         cs->writeisac(cs, ISAC_SPCR, val);
 540                         if (val)
 541                                 cs->writeisac(cs, ISAC_ADF1, 0x8);
 542                         else
 543                                 cs->writeisac(cs, ISAC_ADF1, 0x0);
 544                 }
 545                 spin_unlock_irqrestore(&cs->lock, flags);
 546                 break;
 547         case (HW_DEACTIVATE | RESPONSE):
 548                 skb_queue_purge(&cs->rq);
 549                 skb_queue_purge(&cs->sq);
 550                 if (cs->tx_skb) {
 551                         dev_kfree_skb_any(cs->tx_skb);
 552                         cs->tx_skb = NULL;
 553                 }
 554                 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 555                         del_timer(&cs->dbusytimer);
 556                 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 557                         schedule_event(cs, D_CLEARBUSY);
 558                 break;
 559         default:
 560                 if (cs->debug & L1_DEB_WARN)
 561                         debugl1(cs, "isac_l1hw unknown %04x", pr);
 562                 break;
 563         }
 564 }
 565
 566 static void
 567 setstack_isac(struct PStack *st, struct IsdnCardState *cs)
 568 {
 569         st->l1.l1hw = ISAC_l1hw;
 570 }
 571
 572 static void
 573 DC_Close_isac(struct IsdnCardState *cs)
 574 {
 575         kfree(cs->dc.isac.mon_rx);
 576         cs->dc.isac.mon_rx = NULL;
 577         kfree(cs->dc.isac.mon_tx);
 578         cs->dc.isac.mon_tx = NULL;
 579 }
 580
 581 static void
 582 dbusy_timer_handler(struct IsdnCardState *cs)
 583 {
 584         struct PStack *stptr;
 585         int     rbch, star;
 586
 587         if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
 588                 rbch = cs->readisac(cs, ISAC_RBCH);
 589                 star = cs->readisac(cs, ISAC_STAR);
 590                 if (cs->debug)
 591                         debugl1(cs, "D-Channel Busy RBCH %02x STAR %02x",
 592                                 rbch, star);
 593                 if (rbch & ISAC_RBCH_XAC) { /* D-Channel Busy */
 594                         test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
 595                         stptr = cs->stlist;
 596                         while (stptr != NULL) {
 597                                 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
 598                                 stptr = stptr->next;
 599                         }
 600                 } else {
 601                         /* discard frame; reset transceiver */
 602                         test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
 603                         if (cs->tx_skb) {
 604                                 dev_kfree_skb_any(cs->tx_skb);
 605                                 cs->tx_cnt = 0;
 606                                 cs->tx_skb = NULL;
 607                         } else {
 608                                 printk(KERN_WARNING "HiSax: ISAC D-Channel Busy no skb\n");
 609                                 debugl1(cs, "D-Channel Busy no skb");
 610                         }
 611                         cs->writeisac(cs, ISAC_CMDR, 0x01); /* Transmitter reset */
 612                         cs->irq_func(cs->irq, cs);
 613                 }
 614         }
 615 }
 616
 617 void initisac(struct IsdnCardState *cs)
 618 {
 619         cs->setstack_d = setstack_isac;
 620         cs->DC_Close = DC_Close_isac;
 621         cs->dc.isac.mon_tx = NULL;
 622         cs->dc.isac.mon_rx = NULL;
 623         cs->writeisac(cs, ISAC_MASK, 0xff);
 624         cs->dc.isac.mocr = 0xaa;
 625         if (test_bit(HW_IOM1, &cs->HW_Flags)) {
 626                 /* IOM 1 Mode */
 627                 cs->writeisac(cs, ISAC_ADF2, 0x0);
 628                 cs->writeisac(cs, ISAC_SPCR, 0xa);
 629                 cs->writeisac(cs, ISAC_ADF1, 0x2);
 630                 cs->writeisac(cs, ISAC_STCR, 0x70);
 631                 cs->writeisac(cs, ISAC_MODE, 0xc9);
 632         } else {
 633                 /* IOM 2 Mode */
 634                 if (!cs->dc.isac.adf2)
 635                         cs->dc.isac.adf2 = 0x80;
 636                 cs->writeisac(cs, ISAC_ADF2, cs->dc.isac.adf2);
 637                 cs->writeisac(cs, ISAC_SQXR, 0x2f);
 638                 cs->writeisac(cs, ISAC_SPCR, 0x00);
 639                 cs->writeisac(cs, ISAC_STCR, 0x70);
 640                 cs->writeisac(cs, ISAC_MODE, 0xc9);
 641                 cs->writeisac(cs, ISAC_TIMR, 0x00);
 642                 cs->writeisac(cs, ISAC_ADF1, 0x00);
 643         }
 644         ph_command(cs, ISAC_CMD_RS);
 645         cs->writeisac(cs, ISAC_MASK, 0x0);
 646 }
 647
 648 void clear_pending_isac_ints(struct IsdnCardState *cs)
 649 {
 650         int val, eval;
 651
 652         val = cs->readisac(cs, ISAC_STAR);
 653         debugl1(cs, "ISAC STAR %x", val);
 654         val = cs->readisac(cs, ISAC_MODE);
 655         debugl1(cs, "ISAC MODE %x", val);
 656         val = cs->readisac(cs, ISAC_ADF2);
 657         debugl1(cs, "ISAC ADF2 %x", val);
 658         val = cs->readisac(cs, ISAC_ISTA);
 659         debugl1(cs, "ISAC ISTA %x", val);
 660         if (val & 0x01) {
 661                 eval = cs->readisac(cs, ISAC_EXIR);
 662                 debugl1(cs, "ISAC EXIR %x", eval);
 663         }
 664         val = cs->readisac(cs, ISAC_CIR0);
 665         debugl1(cs, "ISAC CIR0 %x", val);
 666         cs->dc.isac.ph_state = (val >> 2) & 0xf;
 667         schedule_event(cs, D_L1STATECHANGE);
 668         /* Disable all IRQ */
 669         cs->writeisac(cs, ISAC_MASK, 0xFF);
 670 }
 671
 672 void setup_isac(struct IsdnCardState *cs)
 673 {
 674         INIT_WORK(&cs->tqueue, isac_bh);
 675         cs->dbusytimer.function = (void *) dbusy_timer_handler;
 676         cs->dbusytimer.data = (long) cs;
 677         init_timer(&cs->dbusytimer);
 678 }