drivers/isdn/hisax/icc.c

   1 /* $Id: icc.c,v 1.8.2.3 2004/01/13 14:31:25 keil Exp $
   2  *
   3  * ICC specific routines
   4  *
   5  * Author       Matt Henderson & Guy Ellis
   6  * Copyright    by Traverse Technologies Pty Ltd, www.travers.com.au
   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  * 1999.6.25 Initial implementation of routines for Siemens ISDN
  12  * Communication Controller PEB 2070 based on the ISAC routines
  13  * written by Karsten Keil.
  14  *
  15  */
  16
  17 #include <linux/init.h>
  18 #include "hisax.h"
  19 #include "icc.h"
  20 // #include "arcofi.h"
  21 #include "isdnl1.h"
  22 #include <linux/interrupt.h>
  23
  24 #define DBUSY_TIMER_VALUE 80
  25 #define ARCOFI_USE 0
  26
  27 static char *ICCVer[] =
  28 {"2070 A1/A3", "2070 B1", "2070 B2/B3", "2070 V2.4"};
  29
  30 void
  31 ICCVersion(struct IsdnCardState *cs, char *s)
  32 {
  33         int val;
  34
  35         val = cs->readisac(cs, ICC_RBCH);
  36         printk(KERN_INFO "%s ICC version (%x): %s\n", s, val, ICCVer[(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, ICC_CIX0, (command << 2) | 3);
  45 }
  46
  47
  48 static void
  49 icc_new_ph(struct IsdnCardState *cs)
  50 {
  51         switch (cs->dc.icc.ph_state) {
  52                 case (ICC_IND_EI1):
  53                         ph_command(cs, ICC_CMD_DI);
  54                         l1_msg(cs, HW_RESET | INDICATION, NULL);
  55                         break;
  56                 case (ICC_IND_DC):
  57                         l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
  58                         break;
  59                 case (ICC_IND_DR):
  60                         l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
  61                         break;
  62                 case (ICC_IND_PU):
  63                         l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
  64                         break;
  65                 case (ICC_IND_FJ):
  66                         l1_msg(cs, HW_RSYNC | INDICATION, NULL);
  67                         break;
  68                 case (ICC_IND_AR):
  69                         l1_msg(cs, HW_INFO2 | INDICATION, NULL);
  70                         break;
  71                 case (ICC_IND_AI):
  72                         l1_msg(cs, HW_INFO4 | INDICATION, NULL);
  73                         break;
  74                 default:
  75                         break;
  76         }
  77 }
  78
  79 static void
  80 icc_bh(struct work_struct *work)
  81 {
  82         struct IsdnCardState *cs =
  83                 container_of(work, struct IsdnCardState, tqueue);
  84         struct PStack *stptr;
  85
  86         if (!cs)
  87                 return;
  88         if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
  89                 if (cs->debug)
  90                         debugl1(cs, "D-Channel Busy cleared");
  91                 stptr = cs->stlist;
  92                 while (stptr != NULL) {
  93                         stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
  94                         stptr = stptr->next;
  95                 }
  96         }
  97         if (test_and_clear_bit(D_L1STATECHANGE, &cs->event))
  98                 icc_new_ph(cs);
  99         if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
 100                 DChannel_proc_rcv(cs);
 101         if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
 102                 DChannel_proc_xmt(cs);
 103 #if ARCOFI_USE
 104         if (!test_bit(HW_ARCOFI, &cs->HW_Flags))
 105                 return;
 106         if (test_and_clear_bit(D_RX_MON1, &cs->event))
 107                 arcofi_fsm(cs, ARCOFI_RX_END, NULL);
 108         if (test_and_clear_bit(D_TX_MON1, &cs->event))
 109                 arcofi_fsm(cs, ARCOFI_TX_END, NULL);
 110 #endif
 111 }
 112
 113 static void
 114 icc_empty_fifo(struct IsdnCardState *cs, int count)
 115 {
 116         u_char *ptr;
 117
 118         if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
 119                 debugl1(cs, "icc_empty_fifo");
 120
 121         if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
 122                 if (cs->debug & L1_DEB_WARN)
 123                         debugl1(cs, "icc_empty_fifo overrun %d",
 124                                 cs->rcvidx + count);
 125                 cs->writeisac(cs, ICC_CMDR, 0x80);
 126                 cs->rcvidx = 0;
 127                 return;
 128         }
 129         ptr = cs->rcvbuf + cs->rcvidx;
 130         cs->rcvidx += count;
 131         cs->readisacfifo(cs, ptr, count);
 132         cs->writeisac(cs, ICC_CMDR, 0x80);
 133         if (cs->debug & L1_DEB_ISAC_FIFO) {
 134                 char *t = cs->dlog;
 135
 136                 t += sprintf(t, "icc_empty_fifo cnt %d", count);
 137                 QuickHex(t, ptr, count);
 138                 debugl1(cs, cs->dlog);
 139         }
 140 }
 141
 142 static void
 143 icc_fill_fifo(struct IsdnCardState *cs)
 144 {
 145         int count, more;
 146         u_char *ptr;
 147
 148         if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
 149                 debugl1(cs, "icc_fill_fifo");
 150
 151         if (!cs->tx_skb)
 152                 return;
 153
 154         count = cs->tx_skb->len;
 155         if (count <= 0)
 156                 return;
 157
 158         more = 0;
 159         if (count > 32) {
 160                 more = !0;
 161                 count = 32;
 162         }
 163         ptr = cs->tx_skb->data;
 164         skb_pull(cs->tx_skb, count);
 165         cs->tx_cnt += count;
 166         cs->writeisacfifo(cs, ptr, count);
 167         cs->writeisac(cs, ICC_CMDR, more ? 0x8 : 0xa);
 168         if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
 169                 debugl1(cs, "icc_fill_fifo dbusytimer running");
 170                 del_timer(&cs->dbusytimer);
 171         }
 172         init_timer(&cs->dbusytimer);
 173         cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
 174         add_timer(&cs->dbusytimer);
 175         if (cs->debug & L1_DEB_ISAC_FIFO) {
 176                 char *t = cs->dlog;
 177
 178                 t += sprintf(t, "icc_fill_fifo cnt %d", count);
 179                 QuickHex(t, ptr, count);
 180                 debugl1(cs, cs->dlog);
 181         }
 182 }
 183
 184 void
 185 icc_interrupt(struct IsdnCardState *cs, u_char val)
 186 {
 187         u_char exval, v1;
 188         struct sk_buff *skb;
 189         unsigned int count;
 190
 191         if (cs->debug & L1_DEB_ISAC)
 192                 debugl1(cs, "ICC interrupt %x", val);
 193         if (val & 0x80) {       /* RME */
 194                 exval = cs->readisac(cs, ICC_RSTA);
 195                 if ((exval & 0x70) != 0x20) {
 196                         if (exval & 0x40) {
 197                                 if (cs->debug & L1_DEB_WARN)
 198                                         debugl1(cs, "ICC RDO");
 199 #ifdef ERROR_STATISTIC
 200                                 cs->err_rx++;
 201 #endif
 202                         }
 203                         if (!(exval & 0x20)) {
 204                                 if (cs->debug & L1_DEB_WARN)
 205                                         debugl1(cs, "ICC CRC error");
 206 #ifdef ERROR_STATISTIC
 207                                 cs->err_crc++;
 208 #endif
 209                         }
 210                         cs->writeisac(cs, ICC_CMDR, 0x80);
 211                 } else {
 212                         count = cs->readisac(cs, ICC_RBCL) & 0x1f;
 213                         if (count == 0)
 214                                 count = 32;
 215                         icc_empty_fifo(cs, count);
 216                         if ((count = cs->rcvidx) > 0) {
 217                                 cs->rcvidx = 0;
 218                                 if (!(skb = alloc_skb(count, GFP_ATOMIC)))
 219                                         printk(KERN_WARNING "HiSax: D receive out of memory\n");
 220                                 else {
 221                                         memcpy(skb_put(skb, count), cs->rcvbuf, count);
 222                                         skb_queue_tail(&cs->rq, skb);
 223                                 }
 224                         }
 225                 }
 226                 cs->rcvidx = 0;
 227                 schedule_event(cs, D_RCVBUFREADY);
 228         }
 229         if (val & 0x40) {       /* RPF */
 230                 icc_empty_fifo(cs, 32);
 231         }
 232         if (val & 0x20) {       /* RSC */
 233                 /* never */
 234                 if (cs->debug & L1_DEB_WARN)
 235                         debugl1(cs, "ICC RSC interrupt");
 236         }
 237         if (val & 0x10) {       /* XPR */
 238                 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 239                         del_timer(&cs->dbusytimer);
 240                 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 241                         schedule_event(cs, D_CLEARBUSY);
 242                 if (cs->tx_skb) {
 243                         if (cs->tx_skb->len) {
 244                                 icc_fill_fifo(cs);
 245                                 goto afterXPR;
 246                         } else {
 247                                 dev_kfree_skb_irq(cs->tx_skb);
 248                                 cs->tx_cnt = 0;
 249                                 cs->tx_skb = NULL;
 250                         }
 251                 }
 252                 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
 253                         cs->tx_cnt = 0;
 254                         icc_fill_fifo(cs);
 255                 } else
 256                         schedule_event(cs, D_XMTBUFREADY);
 257         }
 258       afterXPR:
 259         if (val & 0x04) {       /* CISQ */
 260                 exval = cs->readisac(cs, ICC_CIR0);
 261                 if (cs->debug & L1_DEB_ISAC)
 262                         debugl1(cs, "ICC CIR0 %02X", exval );
 263                 if (exval & 2) {
 264                         cs->dc.icc.ph_state = (exval >> 2) & 0xf;
 265                         if (cs->debug & L1_DEB_ISAC)
 266                                 debugl1(cs, "ph_state change %x", cs->dc.icc.ph_state);
 267                         schedule_event(cs, D_L1STATECHANGE);
 268                 }
 269                 if (exval & 1) {
 270                         exval = cs->readisac(cs, ICC_CIR1);
 271                         if (cs->debug & L1_DEB_ISAC)
 272                                 debugl1(cs, "ICC CIR1 %02X", exval );
 273                 }
 274         }
 275         if (val & 0x02) {       /* SIN */
 276                 /* never */
 277                 if (cs->debug & L1_DEB_WARN)
 278                         debugl1(cs, "ICC SIN interrupt");
 279         }
 280         if (val & 0x01) {       /* EXI */
 281                 exval = cs->readisac(cs, ICC_EXIR);
 282                 if (cs->debug & L1_DEB_WARN)
 283                         debugl1(cs, "ICC EXIR %02x", exval);
 284                 if (exval & 0x80) {  /* XMR */
 285                         debugl1(cs, "ICC XMR");
 286                         printk(KERN_WARNING "HiSax: ICC XMR\n");
 287                 }
 288                 if (exval & 0x40) {  /* XDU */
 289                         debugl1(cs, "ICC XDU");
 290                         printk(KERN_WARNING "HiSax: ICC XDU\n");
 291 #ifdef ERROR_STATISTIC
 292                         cs->err_tx++;
 293 #endif
 294                         if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 295                                 del_timer(&cs->dbusytimer);
 296                         if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 297                                 schedule_event(cs, D_CLEARBUSY);
 298                         if (cs->tx_skb) { /* Restart frame */
 299                                 skb_push(cs->tx_skb, cs->tx_cnt);
 300                                 cs->tx_cnt = 0;
 301                                 icc_fill_fifo(cs);
 302                         } else {
 303                                 printk(KERN_WARNING "HiSax: ICC XDU no skb\n");
 304                                 debugl1(cs, "ICC XDU no skb");
 305                         }
 306                 }
 307                 if (exval & 0x04) {  /* MOS */
 308                         v1 = cs->readisac(cs, ICC_MOSR);
 309                         if (cs->debug & L1_DEB_MONITOR)
 310                                 debugl1(cs, "ICC MOSR %02x", v1);
 311 #if ARCOFI_USE
 312                         if (v1 & 0x08) {
 313                                 if (!cs->dc.icc.mon_rx) {
 314                                         if (!(cs->dc.icc.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
 315                                                 if (cs->debug & L1_DEB_WARN)
 316                                                         debugl1(cs, "ICC MON RX out of memory!");
 317                                                 cs->dc.icc.mocr &= 0xf0;
 318                                                 cs->dc.icc.mocr |= 0x0a;
 319                                                 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 320                                                 goto afterMONR0;
 321                                         } else
 322                                                 cs->dc.icc.mon_rxp = 0;
 323                                 }
 324                                 if (cs->dc.icc.mon_rxp >= MAX_MON_FRAME) {
 325                                         cs->dc.icc.mocr &= 0xf0;
 326                                         cs->dc.icc.mocr |= 0x0a;
 327                                         cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 328                                         cs->dc.icc.mon_rxp = 0;
 329                                         if (cs->debug & L1_DEB_WARN)
 330                                                 debugl1(cs, "ICC MON RX overflow!");
 331                                         goto afterMONR0;
 332                                 }
 333                                 cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp++] = cs->readisac(cs, ICC_MOR0);
 334                                 if (cs->debug & L1_DEB_MONITOR)
 335                                         debugl1(cs, "ICC MOR0 %02x", cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp -1]);
 336                                 if (cs->dc.icc.mon_rxp == 1) {
 337                                         cs->dc.icc.mocr |= 0x04;
 338                                         cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 339                                 }
 340                         }
 341                       afterMONR0:
 342                         if (v1 & 0x80) {
 343                                 if (!cs->dc.icc.mon_rx) {
 344                                         if (!(cs->dc.icc.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
 345                                                 if (cs->debug & L1_DEB_WARN)
 346                                                         debugl1(cs, "ICC MON RX out of memory!");
 347                                                 cs->dc.icc.mocr &= 0x0f;
 348                                                 cs->dc.icc.mocr |= 0xa0;
 349                                                 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 350                                                 goto afterMONR1;
 351                                         } else
 352                                                 cs->dc.icc.mon_rxp = 0;
 353                                 }
 354                                 if (cs->dc.icc.mon_rxp >= MAX_MON_FRAME) {
 355                                         cs->dc.icc.mocr &= 0x0f;
 356                                         cs->dc.icc.mocr |= 0xa0;
 357                                         cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 358                                         cs->dc.icc.mon_rxp = 0;
 359                                         if (cs->debug & L1_DEB_WARN)
 360                                                 debugl1(cs, "ICC MON RX overflow!");
 361                                         goto afterMONR1;
 362                                 }
 363                                 cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp++] = cs->readisac(cs, ICC_MOR1);
 364                                 if (cs->debug & L1_DEB_MONITOR)
 365                                         debugl1(cs, "ICC MOR1 %02x", cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp -1]);
 366                                 cs->dc.icc.mocr |= 0x40;
 367                                 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 368                         }
 369                       afterMONR1:
 370                         if (v1 & 0x04) {
 371                                 cs->dc.icc.mocr &= 0xf0;
 372                                 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 373                                 cs->dc.icc.mocr |= 0x0a;
 374                                 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 375                                 schedule_event(cs, D_RX_MON0);
 376                         }
 377                         if (v1 & 0x40) {
 378                                 cs->dc.icc.mocr &= 0x0f;
 379                                 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 380                                 cs->dc.icc.mocr |= 0xa0;
 381                                 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 382                                 schedule_event(cs, D_RX_MON1);
 383                         }
 384                         if (v1 & 0x02) {
 385                                 if ((!cs->dc.icc.mon_tx) || (cs->dc.icc.mon_txc &&
 386                                         (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc) &&
 387                                         !(v1 & 0x08))) {
 388                                         cs->dc.icc.mocr &= 0xf0;
 389                                         cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 390                                         cs->dc.icc.mocr |= 0x0a;
 391                                         cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 392                                         if (cs->dc.icc.mon_txc &&
 393                                                 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc))
 394                                                 schedule_event(cs, D_TX_MON0);
 395                                         goto AfterMOX0;
 396                                 }
 397                                 if (cs->dc.icc.mon_txc && (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc)) {
 398                                         schedule_event(cs, D_TX_MON0);
 399                                         goto AfterMOX0;
 400                                 }
 401                                 cs->writeisac(cs, ICC_MOX0,
 402                                         cs->dc.icc.mon_tx[cs->dc.icc.mon_txp++]);
 403                                 if (cs->debug & L1_DEB_MONITOR)
 404                                         debugl1(cs, "ICC %02x -> MOX0", cs->dc.icc.mon_tx[cs->dc.icc.mon_txp -1]);
 405                         }
 406                       AfterMOX0:
 407                         if (v1 & 0x20) {
 408                                 if ((!cs->dc.icc.mon_tx) || (cs->dc.icc.mon_txc &&
 409                                         (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc) &&
 410                                         !(v1 & 0x80))) {
 411                                         cs->dc.icc.mocr &= 0x0f;
 412                                         cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 413                                         cs->dc.icc.mocr |= 0xa0;
 414                                         cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
 415                                         if (cs->dc.icc.mon_txc &&
 416                                                 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc))
 417                                                 schedule_event(cs, D_TX_MON1);
 418                                         goto AfterMOX1;
 419                                 }
 420                                 if (cs->dc.icc.mon_txc && (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc)) {
 421                                         schedule_event(cs, D_TX_MON1);
 422                                         goto AfterMOX1;
 423                                 }
 424                                 cs->writeisac(cs, ICC_MOX1,
 425                                         cs->dc.icc.mon_tx[cs->dc.icc.mon_txp++]);
 426                                 if (cs->debug & L1_DEB_MONITOR)
 427                                         debugl1(cs, "ICC %02x -> MOX1", cs->dc.icc.mon_tx[cs->dc.icc.mon_txp -1]);
 428                         }
 429                       AfterMOX1:
 430 #endif
 431                 }
 432         }
 433 }
 434
 435 static void
 436 ICC_l1hw(struct PStack *st, int pr, void *arg)
 437 {
 438         struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
 439         struct sk_buff *skb = arg;
 440         u_long flags;
 441         int  val;
 442
 443         switch (pr) {
 444                 case (PH_DATA |REQUEST):
 445                         if (cs->debug & DEB_DLOG_HEX)
 446                                 LogFrame(cs, skb->data, skb->len);
 447                         if (cs->debug & DEB_DLOG_VERBOSE)
 448                                 dlogframe(cs, skb, 0);
 449                         spin_lock_irqsave(&cs->lock, flags);
 450                         if (cs->tx_skb) {
 451                                 skb_queue_tail(&cs->sq, skb);
 452 #ifdef L2FRAME_DEBUG            /* psa */
 453                                 if (cs->debug & L1_DEB_LAPD)
 454                                         Logl2Frame(cs, skb, "PH_DATA Queued", 0);
 455 #endif
 456                         } else {
 457                                 cs->tx_skb = skb;
 458                                 cs->tx_cnt = 0;
 459 #ifdef L2FRAME_DEBUG            /* psa */
 460                                 if (cs->debug & L1_DEB_LAPD)
 461                                         Logl2Frame(cs, skb, "PH_DATA", 0);
 462 #endif
 463                                 icc_fill_fifo(cs);
 464                         }
 465                         spin_unlock_irqrestore(&cs->lock, flags);
 466                         break;
 467                 case (PH_PULL |INDICATION):
 468                         spin_lock_irqsave(&cs->lock, flags);
 469                         if (cs->tx_skb) {
 470                                 if (cs->debug & L1_DEB_WARN)
 471                                         debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
 472                                 skb_queue_tail(&cs->sq, skb);
 473                                 break;
 474                         }
 475                         if (cs->debug & DEB_DLOG_HEX)
 476                                 LogFrame(cs, skb->data, skb->len);
 477                         if (cs->debug & DEB_DLOG_VERBOSE)
 478                                 dlogframe(cs, skb, 0);
 479                         cs->tx_skb = skb;
 480                         cs->tx_cnt = 0;
 481 #ifdef L2FRAME_DEBUG            /* psa */
 482                         if (cs->debug & L1_DEB_LAPD)
 483                                 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
 484 #endif
 485                         icc_fill_fifo(cs);
 486                         spin_unlock_irqrestore(&cs->lock, flags);
 487                         break;
 488                 case (PH_PULL | REQUEST):
 489 #ifdef L2FRAME_DEBUG            /* psa */
 490                         if (cs->debug & L1_DEB_LAPD)
 491                                 debugl1(cs, "-> PH_REQUEST_PULL");
 492 #endif
 493                         if (!cs->tx_skb) {
 494                                 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 495                                 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
 496                         } else
 497                                 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 498                         break;
 499                 case (HW_RESET | REQUEST):
 500                         spin_lock_irqsave(&cs->lock, flags);
 501                         if ((cs->dc.icc.ph_state == ICC_IND_EI1) ||
 502                                 (cs->dc.icc.ph_state == ICC_IND_DR))
 503                                 ph_command(cs, ICC_CMD_DI);
 504                         else
 505                                 ph_command(cs, ICC_CMD_RES);
 506                         spin_unlock_irqrestore(&cs->lock, flags);
 507                         break;
 508                 case (HW_ENABLE | REQUEST):
 509                         spin_lock_irqsave(&cs->lock, flags);
 510                         ph_command(cs, ICC_CMD_DI);
 511                         spin_unlock_irqrestore(&cs->lock, flags);
 512                         break;
 513                 case (HW_INFO1 | REQUEST):
 514                         spin_lock_irqsave(&cs->lock, flags);
 515                         ph_command(cs, ICC_CMD_AR);
 516                         spin_unlock_irqrestore(&cs->lock, flags);
 517                         break;
 518                 case (HW_INFO3 | REQUEST):
 519                         spin_lock_irqsave(&cs->lock, flags);
 520                         ph_command(cs, ICC_CMD_AI);
 521                         spin_unlock_irqrestore(&cs->lock, flags);
 522                         break;
 523                 case (HW_TESTLOOP | REQUEST):
 524                         spin_lock_irqsave(&cs->lock, flags);
 525                         val = 0;
 526                         if (1 & (long) arg)
 527                                 val |= 0x0c;
 528                         if (2 & (long) arg)
 529                                 val |= 0x3;
 530                         if (test_bit(HW_IOM1, &cs->HW_Flags)) {
 531                                 /* IOM 1 Mode */
 532                                 if (!val) {
 533                                         cs->writeisac(cs, ICC_SPCR, 0xa);
 534                                         cs->writeisac(cs, ICC_ADF1, 0x2);
 535                                 } else {
 536                                         cs->writeisac(cs, ICC_SPCR, val);
 537                                         cs->writeisac(cs, ICC_ADF1, 0xa);
 538                                 }
 539                         } else {
 540                                 /* IOM 2 Mode */
 541                                 cs->writeisac(cs, ICC_SPCR, val);
 542                                 if (val)
 543                                         cs->writeisac(cs, ICC_ADF1, 0x8);
 544                                 else
 545                                         cs->writeisac(cs, ICC_ADF1, 0x0);
 546                         }
 547                         spin_unlock_irqrestore(&cs->lock, flags);
 548                         break;
 549                 case (HW_DEACTIVATE | RESPONSE):
 550                         skb_queue_purge(&cs->rq);
 551                         skb_queue_purge(&cs->sq);
 552                         if (cs->tx_skb) {
 553                                 dev_kfree_skb_any(cs->tx_skb);
 554                                 cs->tx_skb = NULL;
 555                         }
 556                         if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 557                                 del_timer(&cs->dbusytimer);
 558                         if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 559                                 schedule_event(cs, D_CLEARBUSY);
 560                         break;
 561                 default:
 562                         if (cs->debug & L1_DEB_WARN)
 563                                 debugl1(cs, "icc_l1hw unknown %04x", pr);
 564                         break;
 565         }
 566 }
 567
 568 static void
 569 setstack_icc(struct PStack *st, struct IsdnCardState *cs)
 570 {
 571         st->l1.l1hw = ICC_l1hw;
 572 }
 573
 574 static void
 575 DC_Close_icc(struct IsdnCardState *cs) {
 576         kfree(cs->dc.icc.mon_rx);
 577         cs->dc.icc.mon_rx = NULL;
 578         kfree(cs->dc.icc.mon_tx);
 579         cs->dc.icc.mon_tx = NULL;
 580 }
 581
 582 static void
 583 dbusy_timer_handler(struct IsdnCardState *cs)
 584 {
 585         struct PStack *stptr;
 586         int     rbch, star;
 587
 588         if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
 589                 rbch = cs->readisac(cs, ICC_RBCH);
 590                 star = cs->readisac(cs, ICC_STAR);
 591                 if (cs->debug)
 592                         debugl1(cs, "D-Channel Busy RBCH %02x STAR %02x",
 593                                 rbch, star);
 594                 if (rbch & ICC_RBCH_XAC) { /* D-Channel Busy */
 595                         test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
 596                         stptr = cs->stlist;
 597                         while (stptr != NULL) {
 598                                 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
 599                                 stptr = stptr->next;
 600                         }
 601                 } else {
 602                         /* discard frame; reset transceiver */
 603                         test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
 604                         if (cs->tx_skb) {
 605                                 dev_kfree_skb_any(cs->tx_skb);
 606                                 cs->tx_cnt = 0;
 607                                 cs->tx_skb = NULL;
 608                         } else {
 609                                 printk(KERN_WARNING "HiSax: ICC D-Channel Busy no skb\n");
 610                                 debugl1(cs, "D-Channel Busy no skb");
 611                         }
 612                         cs->writeisac(cs, ICC_CMDR, 0x01); /* Transmitter reset */
 613                         cs->irq_func(cs->irq, cs);
 614                 }
 615         }
 616 }
 617
 618 void
 619 initicc(struct IsdnCardState *cs)
 620 {
 621         cs->setstack_d = setstack_icc;
 622         cs->DC_Close = DC_Close_icc;
 623         cs->dc.icc.mon_tx = NULL;
 624         cs->dc.icc.mon_rx = NULL;
 625         cs->writeisac(cs, ICC_MASK, 0xff);
 626         cs->dc.icc.mocr = 0xaa;
 627         if (test_bit(HW_IOM1, &cs->HW_Flags)) {
 628                 /* IOM 1 Mode */
 629                 cs->writeisac(cs, ICC_ADF2, 0x0);
 630                 cs->writeisac(cs, ICC_SPCR, 0xa);
 631                 cs->writeisac(cs, ICC_ADF1, 0x2);
 632                 cs->writeisac(cs, ICC_STCR, 0x70);
 633                 cs->writeisac(cs, ICC_MODE, 0xc9);
 634         } else {
 635                 /* IOM 2 Mode */
 636                 if (!cs->dc.icc.adf2)
 637                         cs->dc.icc.adf2 = 0x80;
 638                 cs->writeisac(cs, ICC_ADF2, cs->dc.icc.adf2);
 639                 cs->writeisac(cs, ICC_SQXR, 0xa0);
 640                 cs->writeisac(cs, ICC_SPCR, 0x20);
 641                 cs->writeisac(cs, ICC_STCR, 0x70);
 642                 cs->writeisac(cs, ICC_MODE, 0xca);
 643                 cs->writeisac(cs, ICC_TIMR, 0x00);
 644                 cs->writeisac(cs, ICC_ADF1, 0x20);
 645         }
 646         ph_command(cs, ICC_CMD_RES);
 647         cs->writeisac(cs, ICC_MASK, 0x0);
 648         ph_command(cs, ICC_CMD_DI);
 649 }
 650
 651 void
 652 clear_pending_icc_ints(struct IsdnCardState *cs)
 653 {
 654         int val, eval;
 655
 656         val = cs->readisac(cs, ICC_STAR);
 657         debugl1(cs, "ICC STAR %x", val);
 658         val = cs->readisac(cs, ICC_MODE);
 659         debugl1(cs, "ICC MODE %x", val);
 660         val = cs->readisac(cs, ICC_ADF2);
 661         debugl1(cs, "ICC ADF2 %x", val);
 662         val = cs->readisac(cs, ICC_ISTA);
 663         debugl1(cs, "ICC ISTA %x", val);
 664         if (val & 0x01) {
 665                 eval = cs->readisac(cs, ICC_EXIR);
 666                 debugl1(cs, "ICC EXIR %x", eval);
 667         }
 668         val = cs->readisac(cs, ICC_CIR0);
 669         debugl1(cs, "ICC CIR0 %x", val);
 670         cs->dc.icc.ph_state = (val >> 2) & 0xf;
 671         schedule_event(cs, D_L1STATECHANGE);
 672         /* Disable all IRQ */
 673         cs->writeisac(cs, ICC_MASK, 0xFF);
 674 }
 675
 676 void __devinit
 677 setup_icc(struct IsdnCardState *cs)
 678 {
 679         INIT_WORK(&cs->tqueue, icc_bh);
 680         cs->dbusytimer.function = (void *) dbusy_timer_handler;
 681         cs->dbusytimer.data = (long) cs;
 682         init_timer(&cs->dbusytimer);
 683 }