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   1 /* gerdes_amd7930.c,v 0.99 2001/10/02
   2  *
   3  * gerdes_amd7930.c     Amd 79C30A and 79C32A specific routines
   4  *                      (based on HiSax driver by Karsten Keil)
   5  *
   6  * Author               Christoph Ersfeld <info@formula-n.de>
   7  *                      Formula-n Europe AG (www.formula-n.com)
   8  *                      previously Gerdes AG
   9  *
  10  *
  11  *                      This file is (c) under GNU PUBLIC LICENSE
  12  *
  13  *
  14  * Notes:
  15  * Version 0.99 is the first release of this driver and there are
  16  * certainly a few bugs.
  17  *
  18  * Please don't report any malfunction to me without sending
  19  * (compressed) debug-logs.
  20  * It would be nearly impossible to retrace it.
  21  *
  22  * Log D-channel-processing as follows:
  23  *
  24  * 1. Load hisax with card-specific parameters, this example ist for
  25  *    Formula-n enter:now ISDN PCI and compatible
  26  *    (f.e. Gerdes Power ISDN PCI)
  27  *
  28  *    modprobe hisax type=41 protocol=2 id=gerdes
  29  *
  30  *    if you chose an other value for id, you need to modify the
  31  *    code below, too.
  32  *
  33  * 2. set debug-level
  34  *
  35  *    hisaxctrl gerdes 1 0x3ff
  36  *    hisaxctrl gerdes 11 0x4f
  37  *    cat /dev/isdnctrl >> ~/log &
  38  *
  39  * Please take also a look into /var/log/messages if there is
  40  * anything importand concerning HISAX.
  41  *
  42  *
  43  * Credits:
  44  * Programming the driver for Formula-n enter:now ISDN PCI and
  45  * necessary this driver for the used Amd 7930 D-channel-controller
  46  * was spnsored by Formula-n Europe AG.
  47  * Thanks to Karsten Keil and Petr Novak, who gave me support in
  48  * Hisax-specific questions.
  49  * I want so say special thanks to Carl-Friedrich Braun, who had to
  50  * answer a lot of questions about generally ISDN and about handling
  51  * of the Amd-Chip.
  52  *
  53  */
  54
  55
  56 #include "hisax.h"
  57 #include "isdnl1.h"
  58 #include "isac.h"
  59 #include "amd7930_fn.h"
  60 #include <linux/interrupt.h>
  61 #include <linux/init.h>
  62
  63 static void Amd7930_new_ph(struct IsdnCardState *cs);
  64
  65 static WORD initAMD[] = {
  66         0x0100,
  67
  68         0x00A5, 3, 0x01, 0x40, 0x58,                            // LPR, LMR1, LMR2
  69         0x0086, 1, 0x0B,                                        // DMR1 (D-Buffer TH-Interrupts on)
  70         0x0087, 1, 0xFF,                                        // DMR2
  71         0x0092, 1, 0x03,                                        // EFCR (extended mode d-channel-fifo on)
  72         0x0090, 4, 0xFE, 0xFF, 0x02, 0x0F,                      // FRAR4, SRAR4, DMR3, DMR4 (address recognition )
  73         0x0084, 2, 0x80, 0x00,                                  // DRLR
  74         0x00C0, 1, 0x47,                                        // PPCR1
  75         0x00C8, 1, 0x01,                                        // PPCR2
  76
  77         0x0102,
  78         0x0107,
  79         0x01A1, 1,
  80         0x0121, 1,
  81         0x0189, 2,
  82
  83         0x0045, 4, 0x61, 0x72, 0x00, 0x00,                      // MCR1, MCR2, MCR3, MCR4
  84         0x0063, 2, 0x08, 0x08,                                  // GX
  85         0x0064, 2, 0x08, 0x08,                                  // GR
  86         0x0065, 2, 0x99, 0x00,                                  // GER
  87         0x0066, 2, 0x7C, 0x8B,                                  // STG
  88         0x0067, 2, 0x00, 0x00,                                  // FTGR1, FTGR2
  89         0x0068, 2, 0x20, 0x20,                                  // ATGR1, ATGR2
  90         0x0069, 1, 0x4F,                                        // MMR1
  91         0x006A, 1, 0x00,                                        // MMR2
  92         0x006C, 1, 0x40,                                        // MMR3
  93         0x0021, 1, 0x02,                                        // INIT
  94         0x00A3, 1, 0x40,                                        // LMR1
  95
  96         0xFFFF
  97 };
  98
  99
 100 static void /* macro wWordAMD */
 101 WriteWordAmd7930(struct IsdnCardState *cs, BYTE reg, WORD val)
 102 {
 103         wByteAMD(cs, 0x00, reg);
 104         wByteAMD(cs, 0x01, LOBYTE(val));
 105         wByteAMD(cs, 0x01, HIBYTE(val));
 106 }
 107
 108 static WORD /* macro rWordAMD */
 109 ReadWordAmd7930(struct IsdnCardState *cs, BYTE reg)
 110 {
 111         WORD res;
 112         /* direct access register */
 113         if(reg < 8) {
 114                 res = rByteAMD(cs, reg);
 115                 res += 256*rByteAMD(cs, reg);
 116         }
 117         /* indirect access register */
 118         else {
 119                 wByteAMD(cs, 0x00, reg);
 120                 res = rByteAMD(cs, 0x01);
 121                 res += 256*rByteAMD(cs, 0x01);
 122         }
 123         return (res);
 124 }
 125
 126
 127 static void
 128 Amd7930_ph_command(struct IsdnCardState *cs, u_char command, char *s)
 129 {
 130         if (cs->debug & L1_DEB_ISAC)
 131                 debugl1(cs, "AMD7930: %s: ph_command 0x%02X", s, command);
 132
 133         cs->dc.amd7930.lmr1 = command;
 134         wByteAMD(cs, 0xA3, command);
 135 }
 136
 137
 138
 139 static BYTE i430States[] = {
 140 // to   reset  F3    F4    F5    F6    F7    F8    AR     from
 141         0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00,   // init
 142         0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00,   // reset
 143         0x01, 0x02, 0x00, 0x00, 0x00, 0x09, 0x05, 0x04,   // F3
 144         0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00,   // F4
 145         0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00,   // F5
 146         0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x05, 0x00,   // F6
 147         0x11, 0x13, 0x00, 0x00, 0x1B, 0x00, 0x15, 0x00,   // F7
 148         0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00,   // F8
 149         0x01, 0x03, 0x00, 0x00, 0x00, 0x09, 0x00, 0x0A};  // AR
 150
 151
 152 /*                    Row     init    -   reset  F3    F4    F5    F6    F7    F8    AR */
 153 static BYTE stateHelper[] = { 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
 154
 155
 156
 157
 158 static void
 159 Amd7930_get_state(struct IsdnCardState *cs) {
 160         BYTE lsr = rByteAMD(cs, 0xA1);
 161         cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
 162         Amd7930_new_ph(cs);
 163 }
 164
 165
 166
 167 static void
 168 Amd7930_new_ph(struct IsdnCardState *cs)
 169 {
 170         u_char index = stateHelper[cs->dc.amd7930.old_state]*8 + stateHelper[cs->dc.amd7930.ph_state]-1;
 171         u_char message = i430States[index];
 172
 173         if (cs->debug & L1_DEB_ISAC)
 174                 debugl1(cs, "AMD7930: new_ph %d, old_ph %d, message %d, index %d",
 175                         cs->dc.amd7930.ph_state, cs->dc.amd7930.old_state, message & 0x0f, index);
 176
 177         cs->dc.amd7930.old_state = cs->dc.amd7930.ph_state;
 178
 179         /* abort transmit if nessesary */
 180         if ((message & 0xf0) && (cs->tx_skb)) {
 181                 wByteAMD(cs, 0x21, 0xC2);
 182                 wByteAMD(cs, 0x21, 0x02);
 183         }
 184
 185         switch (message & 0x0f) {
 186
 187                 case (1):
 188                         l1_msg(cs, HW_RESET | INDICATION, NULL);
 189                         Amd7930_get_state(cs);
 190                         break;
 191                 case (2): /* init, Card starts in F3 */
 192                         l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
 193                         break;
 194                 case (3):
 195                         l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
 196                         break;
 197                 case (4):
 198                         l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
 199                         Amd7930_ph_command(cs, 0x50, "HW_ENABLE REQUEST");
 200                         break;
 201                 case (5):
 202                         l1_msg(cs, HW_RSYNC | INDICATION, NULL);
 203                         break;
 204                 case (6):
 205                         l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
 206                         break;
 207                 case (7): /* init, Card starts in F7 */
 208                         l1_msg(cs, HW_RSYNC | INDICATION, NULL);
 209                         l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
 210                         break;
 211                 case (8):
 212                         l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
 213                         /* fall through */
 214                 case (9):
 215                         Amd7930_ph_command(cs, 0x40, "HW_ENABLE REQ cleared if set");
 216                         l1_msg(cs, HW_RSYNC | INDICATION, NULL);
 217                         l1_msg(cs, HW_INFO2 | INDICATION, NULL);
 218                         l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
 219                         break;
 220                 case (10):
 221                         Amd7930_ph_command(cs, 0x40, "T3 expired, HW_ENABLE REQ cleared");
 222                         cs->dc.amd7930.old_state = 3;
 223                         break;
 224                 case (11):
 225                         l1_msg(cs, HW_INFO2 | INDICATION, NULL);
 226                         break;
 227                 default:
 228                         break;
 229         }
 230 }
 231
 232
 233
 234 static void
 235 Amd7930_bh(struct work_struct *work)
 236 {
 237         struct IsdnCardState *cs =
 238                 container_of(work, struct IsdnCardState, tqueue);
 239         struct PStack *stptr;
 240
 241         if (!cs)
 242                 return;
 243         if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
 244                 if (cs->debug)
 245                         debugl1(cs, "Amd7930: bh, D-Channel Busy cleared");
 246                 stptr = cs->stlist;
 247                 while (stptr != NULL) {
 248                         stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
 249                         stptr = stptr->next;
 250                 }
 251         }
 252         if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
 253                 if (cs->debug & L1_DEB_ISAC)
 254                         debugl1(cs, "AMD7930: bh, D_L1STATECHANGE");
 255                 Amd7930_new_ph(cs);
 256         }
 257
 258         if (test_and_clear_bit(D_RCVBUFREADY, &cs->event)) {
 259                 if (cs->debug & L1_DEB_ISAC)
 260                         debugl1(cs, "AMD7930: bh, D_RCVBUFREADY");
 261                 DChannel_proc_rcv(cs);
 262         }
 263
 264         if (test_and_clear_bit(D_XMTBUFREADY, &cs->event)) {
 265                 if (cs->debug & L1_DEB_ISAC)
 266                         debugl1(cs, "AMD7930: bh, D_XMTBUFREADY");
 267                 DChannel_proc_xmt(cs);
 268         }
 269 }
 270
 271 static void
 272 Amd7930_empty_Dfifo(struct IsdnCardState *cs, int flag)
 273 {
 274
 275         BYTE stat, der;
 276         BYTE *ptr;
 277         struct sk_buff *skb;
 278
 279
 280         if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
 281                 debugl1(cs, "Amd7930: empty_Dfifo");
 282
 283
 284         ptr = cs->rcvbuf + cs->rcvidx;
 285
 286         /* AMD interrupts off */
 287         AmdIrqOff(cs);
 288
 289         /* read D-Channel-Fifo*/
 290         stat = rByteAMD(cs, 0x07); // DSR2
 291
 292                 /* while Data in Fifo ... */
 293                 while ( (stat & 2) && ((ptr-cs->rcvbuf) < MAX_DFRAME_LEN_L1) ) {
 294                         *ptr = rByteAMD(cs, 0x04); // DCRB
 295                         ptr++;
 296                         stat = rByteAMD(cs, 0x07); // DSR2
 297                         cs->rcvidx = ptr - cs->rcvbuf;
 298
 299                         /* Paket ready? */
 300                         if (stat & 1) {
 301
 302                                 der = rWordAMD(cs, 0x03);
 303
 304                                 /* no errors, packet ok */
 305                                 if(!der && !flag) {
 306                                         rWordAMD(cs, 0x89); // clear DRCR
 307
 308                                         if ((cs->rcvidx) > 0) {
 309                                                 if (!(skb = alloc_skb(cs->rcvidx, GFP_ATOMIC)))
 310                                                         printk(KERN_WARNING "HiSax: Amd7930: empty_Dfifo, D receive out of memory!\n");
 311                                                 else {
 312                                                         /* Debugging */
 313                                                         if (cs->debug & L1_DEB_ISAC_FIFO) {
 314                                                                 char *t = cs->dlog;
 315
 316                                                                 t += sprintf(t, "Amd7930: empty_Dfifo cnt: %d |", cs->rcvidx);
 317                                                                 QuickHex(t, cs->rcvbuf, cs->rcvidx);
 318                                                                 debugl1(cs, cs->dlog);
 319                                                         }
 320                                                         /* moves received data in sk-buffer */
 321                                                         memcpy(skb_put(skb, cs->rcvidx), cs->rcvbuf, cs->rcvidx);
 322                                                         skb_queue_tail(&cs->rq, skb);
 323                                                 }
 324                                         }
 325
 326                                 }
 327                                 /* throw damaged packets away, reset receive-buffer, indicate RX */
 328                                 ptr = cs->rcvbuf;
 329                                 cs->rcvidx = 0;
 330                                 schedule_event(cs, D_RCVBUFREADY);
 331                         }
 332                 }
 333                 /* Packet to long, overflow */
 334                 if(cs->rcvidx >= MAX_DFRAME_LEN_L1) {
 335                         if (cs->debug & L1_DEB_WARN)
 336                                 debugl1(cs, "AMD7930: empty_Dfifo L2-Framelength overrun");
 337                         cs->rcvidx = 0;
 338                         return;
 339                 }
 340         /* AMD interrupts on */
 341         AmdIrqOn(cs);
 342 }
 343
 344
 345 static void
 346 Amd7930_fill_Dfifo(struct IsdnCardState *cs)
 347 {
 348
 349         WORD dtcrr, dtcrw, len, count;
 350         BYTE txstat, dmr3;
 351         BYTE *ptr, *deb_ptr;
 352
 353         if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
 354                 debugl1(cs, "Amd7930: fill_Dfifo");
 355
 356         if ((!cs->tx_skb) || (cs->tx_skb->len <= 0))
 357                 return;
 358
 359         dtcrw = 0;
 360         if(!cs->dc.amd7930.tx_xmtlen)
 361                 /* new Frame */
 362                 len = dtcrw = cs->tx_skb->len;
 363         /* continue frame */
 364         else len = cs->dc.amd7930.tx_xmtlen;
 365
 366
 367         /* AMD interrupts off */
 368         AmdIrqOff(cs);
 369
 370         deb_ptr = ptr = cs->tx_skb->data;
 371
 372         /* while free place in tx-fifo available and data in sk-buffer */
 373         txstat = 0x10;
 374         while((txstat & 0x10) && (cs->tx_cnt < len)) {
 375                 wByteAMD(cs, 0x04, *ptr);
 376                 ptr++;
 377                 cs->tx_cnt++;
 378                 txstat= rByteAMD(cs, 0x07);
 379         }
 380         count = ptr - cs->tx_skb->data;
 381         skb_pull(cs->tx_skb, count);
 382
 383
 384         dtcrr = rWordAMD(cs, 0x85); // DTCR
 385         dmr3  = rByteAMD(cs, 0x8E);
 386
 387         if (cs->debug & L1_DEB_ISAC) {
 388                 debugl1(cs, "Amd7930: fill_Dfifo, DMR3: 0x%02X, DTCR read: 0x%04X write: 0x%02X 0x%02X", dmr3, dtcrr, LOBYTE(dtcrw), HIBYTE(dtcrw));
 389         }
 390
 391         /* writeing of dtcrw starts transmit */
 392         if(!cs->dc.amd7930.tx_xmtlen) {
 393                 wWordAMD(cs, 0x85, dtcrw);
 394                 cs->dc.amd7930.tx_xmtlen = dtcrw;
 395         }
 396
 397         if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
 398                 debugl1(cs, "Amd7930: fill_Dfifo dbusytimer running");
 399                 del_timer(&cs->dbusytimer);
 400         }
 401         init_timer(&cs->dbusytimer);
 402         cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ) / 1000);
 403         add_timer(&cs->dbusytimer);
 404
 405         if (cs->debug & L1_DEB_ISAC_FIFO) {
 406                 char *t = cs->dlog;
 407
 408                 t += sprintf(t, "Amd7930: fill_Dfifo cnt: %d |", count);
 409                 QuickHex(t, deb_ptr, count);
 410                 debugl1(cs, cs->dlog);
 411         }
 412         /* AMD interrupts on */
 413         AmdIrqOn(cs);
 414 }
 415
 416
 417 void Amd7930_interrupt(struct IsdnCardState *cs, BYTE irflags)
 418 {
 419         BYTE dsr1, dsr2, lsr;
 420         WORD der;
 421
 422  while (irflags)
 423  {
 424
 425         dsr1 = rByteAMD(cs, 0x02);
 426         der  = rWordAMD(cs, 0x03);
 427         dsr2 = rByteAMD(cs, 0x07);
 428         lsr  = rByteAMD(cs, 0xA1);
 429
 430         if (cs->debug & L1_DEB_ISAC)
 431                 debugl1(cs, "Amd7930: interrupt: flags: 0x%02X, DSR1: 0x%02X, DSR2: 0x%02X, LSR: 0x%02X, DER=0x%04X", irflags, dsr1, dsr2, lsr, der);
 432
 433         /* D error -> read DER and DSR2 bit 2 */
 434         if (der || (dsr2 & 4)) {
 435
 436                 if (cs->debug & L1_DEB_WARN)
 437                         debugl1(cs, "Amd7930: interrupt: D error DER=0x%04X", der);
 438
 439                 /* RX, TX abort if collision detected */
 440                 if (der & 2) {
 441                         wByteAMD(cs, 0x21, 0xC2);
 442                         wByteAMD(cs, 0x21, 0x02);
 443                         if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 444                                 del_timer(&cs->dbusytimer);
 445                         if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 446                                 schedule_event(cs, D_CLEARBUSY);
 447                         /* restart frame */
 448                         if (cs->tx_skb) {
 449                                 skb_push(cs->tx_skb, cs->tx_cnt);
 450                                 cs->tx_cnt = 0;
 451                                 cs->dc.amd7930.tx_xmtlen = 0;
 452                                 Amd7930_fill_Dfifo(cs);
 453                         } else {
 454                                 printk(KERN_WARNING "HiSax: Amd7930 D-Collision, no skb\n");
 455                                 debugl1(cs, "Amd7930: interrupt: D-Collision, no skb");
 456                         }
 457                 }
 458                 /* remove damaged data from fifo */
 459                 Amd7930_empty_Dfifo(cs, 1);
 460
 461                 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 462                         del_timer(&cs->dbusytimer);
 463                 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 464                         schedule_event(cs, D_CLEARBUSY);
 465                 /* restart TX-Frame */
 466                 if (cs->tx_skb) {
 467                         skb_push(cs->tx_skb, cs->tx_cnt);
 468                         cs->tx_cnt = 0;
 469                         cs->dc.amd7930.tx_xmtlen = 0;
 470                         Amd7930_fill_Dfifo(cs);
 471                 }
 472         }
 473
 474         /* D TX FIFO empty -> fill */
 475         if (irflags & 1) {
 476                 if (cs->debug & L1_DEB_ISAC)
 477                         debugl1(cs, "Amd7930: interrupt: clear Timer and fill D-TX-FIFO if data");
 478
 479                 /* AMD interrupts off */
 480                 AmdIrqOff(cs);
 481
 482                 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 483                         del_timer(&cs->dbusytimer);
 484                 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 485                         schedule_event(cs, D_CLEARBUSY);
 486                 if (cs->tx_skb) {
 487                         if (cs->tx_skb->len)
 488                                 Amd7930_fill_Dfifo(cs);
 489                 }
 490                 /* AMD interrupts on */
 491                 AmdIrqOn(cs);
 492         }
 493
 494
 495         /* D RX FIFO full or tiny packet in Fifo -> empty */
 496         if ((irflags & 2) || (dsr1 & 2)) {
 497                 if (cs->debug & L1_DEB_ISAC)
 498                         debugl1(cs, "Amd7930: interrupt: empty D-FIFO");
 499                 Amd7930_empty_Dfifo(cs, 0);
 500         }
 501
 502
 503         /* D-Frame transmit complete */
 504         if (dsr1 & 64) {
 505                 if (cs->debug & L1_DEB_ISAC) {
 506                         debugl1(cs, "Amd7930: interrupt: transmit packet ready");
 507                 }
 508                 /* AMD interrupts off */
 509                 AmdIrqOff(cs);
 510
 511                 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 512                         del_timer(&cs->dbusytimer);
 513                 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 514                         schedule_event(cs, D_CLEARBUSY);
 515
 516                 if (cs->tx_skb) {
 517                         if (cs->debug & L1_DEB_ISAC)
 518                                 debugl1(cs, "Amd7930: interrupt: TX-Packet ready, freeing skb");
 519                         dev_kfree_skb_irq(cs->tx_skb);
 520                         cs->tx_cnt = 0;
 521                         cs->dc.amd7930.tx_xmtlen=0;
 522                         cs->tx_skb = NULL;
 523                 }
 524                 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
 525                         if (cs->debug & L1_DEB_ISAC)
 526                                 debugl1(cs, "Amd7930: interrupt: TX-Packet ready, next packet dequeued");
 527                         cs->tx_cnt = 0;
 528                         cs->dc.amd7930.tx_xmtlen=0;
 529                         Amd7930_fill_Dfifo(cs);
 530                 }
 531                 else
 532                         schedule_event(cs, D_XMTBUFREADY);
 533                 /* AMD interrupts on */
 534                 AmdIrqOn(cs);
 535         }
 536
 537         /* LIU status interrupt -> read LSR, check statechanges */
 538         if (lsr & 0x38) {
 539                 /* AMD interrupts off */
 540                 AmdIrqOff(cs);
 541
 542                 if (cs->debug & L1_DEB_ISAC)
 543                         debugl1(cs, "Amd: interrupt: LSR=0x%02X, LIU is in state %d", lsr, ((lsr & 0x7) +2));
 544
 545                 cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
 546
 547                 schedule_event(cs, D_L1STATECHANGE);
 548                 /* AMD interrupts on */
 549                 AmdIrqOn(cs);
 550         }
 551
 552         /* reads Interrupt-Register again. If there is a new interrupt-flag: restart handler */
 553         irflags = rByteAMD(cs, 0x00);
 554  }
 555
 556 }
 557
 558 static void
 559 Amd7930_l1hw(struct PStack *st, int pr, void *arg)
 560 {
 561         struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
 562         struct sk_buff *skb = arg;
 563         u_long flags;
 564
 565         if (cs->debug & L1_DEB_ISAC)
 566                 debugl1(cs, "Amd7930: l1hw called, pr: 0x%04X", pr);
 567
 568         switch (pr) {
 569                 case (PH_DATA | REQUEST):
 570                         if (cs->debug & DEB_DLOG_HEX)
 571                                 LogFrame(cs, skb->data, skb->len);
 572                         if (cs->debug & DEB_DLOG_VERBOSE)
 573                                 dlogframe(cs, skb, 0);
 574                         spin_lock_irqsave(&cs->lock, flags);
 575                         if (cs->tx_skb) {
 576                                 skb_queue_tail(&cs->sq, skb);
 577 #ifdef L2FRAME_DEBUG            /* psa */
 578                                 if (cs->debug & L1_DEB_LAPD)
 579                                         Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA Queued", 0);
 580 #endif
 581                         } else {
 582                                 cs->tx_skb = skb;
 583                                 cs->tx_cnt = 0;
 584                                 cs->dc.amd7930.tx_xmtlen=0;
 585 #ifdef L2FRAME_DEBUG            /* psa */
 586                                 if (cs->debug & L1_DEB_LAPD)
 587                                         Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA", 0);
 588 #endif
 589                                 Amd7930_fill_Dfifo(cs);
 590                         }
 591                         spin_unlock_irqrestore(&cs->lock, flags);
 592                         break;
 593                 case (PH_PULL | INDICATION):
 594                         spin_lock_irqsave(&cs->lock, flags);
 595                         if (cs->tx_skb) {
 596                                 if (cs->debug & L1_DEB_WARN)
 597                                         debugl1(cs, "Amd7930: l1hw: l2l1 tx_skb exist this shouldn't happen");
 598                                 skb_queue_tail(&cs->sq, skb);
 599                                 break;
 600                         }
 601                         if (cs->debug & DEB_DLOG_HEX)
 602                                 LogFrame(cs, skb->data, skb->len);
 603                         if (cs->debug & DEB_DLOG_VERBOSE)
 604                                 dlogframe(cs, skb, 0);
 605                         cs->tx_skb = skb;
 606                         cs->tx_cnt = 0;
 607                         cs->dc.amd7930.tx_xmtlen=0;
 608 #ifdef L2FRAME_DEBUG            /* psa */
 609                         if (cs->debug & L1_DEB_LAPD)
 610                                 Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA_PULLED", 0);
 611 #endif
 612                         Amd7930_fill_Dfifo(cs);
 613                         spin_unlock_irqrestore(&cs->lock, flags);
 614                         break;
 615                 case (PH_PULL | REQUEST):
 616 #ifdef L2FRAME_DEBUG            /* psa */
 617                         if (cs->debug & L1_DEB_LAPD)
 618                                 debugl1(cs, "Amd7930: l1hw: -> PH_REQUEST_PULL, skb: %s", (cs->tx_skb)? "yes":"no");
 619 #endif
 620                         if (!cs->tx_skb) {
 621                                 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 622                                 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
 623                         } else
 624                                 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 625                         break;
 626                 case (HW_RESET | REQUEST):
 627                         spin_lock_irqsave(&cs->lock, flags);
 628                         if ((cs->dc.amd7930.ph_state == 8)) {
 629                                 /* b-channels off, PH-AR cleared
 630                                  * change to F3 */
 631                                 Amd7930_ph_command(cs, 0x20, "HW_RESET REQEST"); //LMR1 bit 5
 632                                 spin_unlock_irqrestore(&cs->lock, flags);
 633                         } else {
 634                                 Amd7930_ph_command(cs, 0x40, "HW_RESET REQUEST");
 635                                 cs->dc.amd7930.ph_state = 2;
 636                                 spin_unlock_irqrestore(&cs->lock, flags);
 637                                 Amd7930_new_ph(cs);
 638                         }
 639                         break;
 640                 case (HW_ENABLE | REQUEST):
 641                         cs->dc.amd7930.ph_state = 9;
 642                         Amd7930_new_ph(cs);
 643                         break;
 644                 case (HW_INFO3 | REQUEST):
 645                         // automatic
 646                         break;
 647                 case (HW_TESTLOOP | REQUEST):
 648                         /* not implemented yet */
 649                         break;
 650                 case (HW_DEACTIVATE | RESPONSE):
 651                         skb_queue_purge(&cs->rq);
 652                         skb_queue_purge(&cs->sq);
 653                         if (cs->tx_skb) {
 654                                 dev_kfree_skb(cs->tx_skb);
 655                                 cs->tx_skb = NULL;
 656                         }
 657                         if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
 658                                 del_timer(&cs->dbusytimer);
 659                         if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
 660                                 schedule_event(cs, D_CLEARBUSY);
 661                         break;
 662                 default:
 663                         if (cs->debug & L1_DEB_WARN)
 664                                 debugl1(cs, "Amd7930: l1hw: unknown %04x", pr);
 665                         break;
 666         }
 667 }
 668
 669 static void
 670 setstack_Amd7930(struct PStack *st, struct IsdnCardState *cs)
 671 {
 672
 673         if (cs->debug & L1_DEB_ISAC)
 674                 debugl1(cs, "Amd7930: setstack called");
 675
 676         st->l1.l1hw = Amd7930_l1hw;
 677 }
 678
 679
 680 static void
 681 DC_Close_Amd7930(struct IsdnCardState *cs) {
 682         if (cs->debug & L1_DEB_ISAC)
 683                 debugl1(cs, "Amd7930: DC_Close called");
 684 }
 685
 686
 687 static void
 688 dbusy_timer_handler(struct IsdnCardState *cs)
 689 {
 690         u_long flags;
 691         struct PStack *stptr;
 692         WORD dtcr, der;
 693         BYTE dsr1, dsr2;
 694
 695
 696         if (cs->debug & L1_DEB_ISAC)
 697                 debugl1(cs, "Amd7930: dbusy_timer expired!");
 698
 699         if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
 700                 spin_lock_irqsave(&cs->lock, flags);
 701                 /* D Transmit Byte Count Register:
 702                  * Counts down packet's number of Bytes, 0 if packet ready */
 703                 dtcr = rWordAMD(cs, 0x85);
 704                 dsr1 = rByteAMD(cs, 0x02);
 705                 dsr2 = rByteAMD(cs, 0x07);
 706                 der  = rWordAMD(cs, 0x03);
 707
 708                 if (cs->debug & L1_DEB_ISAC)
 709                         debugl1(cs, "Amd7930: dbusy_timer_handler: DSR1=0x%02X, DSR2=0x%02X, DER=0x%04X, cs->tx_skb->len=%u, tx_stat=%u, dtcr=%u, cs->tx_cnt=%u", dsr1, dsr2, der, cs->tx_skb->len, cs->dc.amd7930.tx_xmtlen, dtcr, cs->tx_cnt);
 710
 711                 if ((cs->dc.amd7930.tx_xmtlen - dtcr) < cs->tx_cnt) {   /* D-Channel Busy */
 712                         test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
 713                         stptr = cs->stlist;
 714                         spin_unlock_irqrestore(&cs->lock, flags);
 715                         while (stptr != NULL) {
 716                                 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
 717                                 stptr = stptr->next;
 718                         }
 719
 720                 } else {
 721                         /* discard frame; reset transceiver */
 722                         test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
 723                         if (cs->tx_skb) {
 724                                 dev_kfree_skb_any(cs->tx_skb);
 725                                 cs->tx_cnt = 0;
 726                                 cs->tx_skb = NULL;
 727                                 cs->dc.amd7930.tx_xmtlen = 0;
 728                         } else {
 729                                 printk(KERN_WARNING "HiSax: Amd7930: D-Channel Busy no skb\n");
 730                                 debugl1(cs, "Amd7930: D-Channel Busy no skb");
 731
 732                         }
 733                         /* Transmitter reset, abort transmit */
 734                         wByteAMD(cs, 0x21, 0x82);
 735                         wByteAMD(cs, 0x21, 0x02);
 736                         spin_unlock_irqrestore(&cs->lock, flags);
 737                         cs->irq_func(cs->irq, cs);
 738
 739                         if (cs->debug & L1_DEB_ISAC)
 740                                 debugl1(cs, "Amd7930: dbusy_timer_handler: Transmitter reset");
 741                 }
 742         }
 743 }
 744
 745
 746
 747 void Amd7930_init(struct IsdnCardState *cs)
 748 {
 749     WORD *ptr;
 750     BYTE cmd, cnt;
 751
 752         if (cs->debug & L1_DEB_ISAC)
 753                 debugl1(cs, "Amd7930: initamd called");
 754
 755         cs->dc.amd7930.tx_xmtlen = 0;
 756         cs->dc.amd7930.old_state = 0;
 757         cs->dc.amd7930.lmr1 = 0x40;
 758         cs->dc.amd7930.ph_command = Amd7930_ph_command;
 759         cs->setstack_d = setstack_Amd7930;
 760         cs->DC_Close = DC_Close_Amd7930;
 761
 762         /* AMD Initialisation */
 763         for (ptr = initAMD; *ptr != 0xFFFF; ) {
 764                 cmd = LOBYTE(*ptr);
 765
 766                 /* read */
 767                 if (*ptr++ >= 0x100) {
 768                         if (cmd < 8)
 769                                 /* reset register */
 770                                 rByteAMD(cs, cmd);
 771                         else {
 772                                 wByteAMD(cs, 0x00, cmd);
 773                                 for (cnt = *ptr++; cnt > 0; cnt--)
 774                                         rByteAMD(cs, 0x01);
 775                         }
 776                 }
 777                 /* write */
 778                 else if (cmd < 8)
 779                         wByteAMD(cs, cmd, LOBYTE(*ptr++));
 780
 781                 else {
 782                         wByteAMD(cs, 0x00, cmd);
 783                         for (cnt = *ptr++; cnt > 0; cnt--)
 784                                 wByteAMD(cs, 0x01, LOBYTE(*ptr++));
 785                 }
 786         }
 787 }
 788
 789 void __devinit
 790 setup_Amd7930(struct IsdnCardState *cs)
 791 {
 792         INIT_WORK(&cs->tqueue, Amd7930_bh);
 793         cs->dbusytimer.function = (void *) dbusy_timer_handler;
 794         cs->dbusytimer.data = (long) cs;
 795         init_timer(&cs->dbusytimer);
 796 }