kernel/drivers/isdn/hardware/mISDN/w6692.c

   1 /*
   2  * w6692.c     mISDN driver for Winbond w6692 based cards
   3  *
   4  * Author      Karsten Keil <kkeil@suse.de>
   5  *             based on the w6692 I4L driver from Petr Novak <petr.novak@i.cz>
   6  *
   7  * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #include <linux/interrupt.h>
  25 #include <linux/module.h>
  26 #include <linux/pci.h>
  27 #include <linux/delay.h>
  28 #include <linux/mISDNhw.h>
  29 #include <linux/slab.h>
  30 #include "w6692.h"
  31
  32 #define W6692_REV       "2.0"
  33
  34 #define DBUSY_TIMER_VALUE       80
  35
  36 enum {
  37         W6692_ASUS,
  38         W6692_WINBOND,
  39         W6692_USR
  40 };
  41
  42 /* private data in the PCI devices list */
  43 struct w6692map {
  44         u_int   subtype;
  45         char    *name;
  46 };
  47
  48 static const struct w6692map  w6692_map[] =
  49 {
  50         {W6692_ASUS, "Dynalink/AsusCom IS64PH"},
  51         {W6692_WINBOND, "Winbond W6692"},
  52         {W6692_USR, "USR W6692"}
  53 };
  54
  55 #ifndef PCI_VENDOR_ID_USR
  56 #define PCI_VENDOR_ID_USR       0x16ec
  57 #define PCI_DEVICE_ID_USR_6692  0x3409
  58 #endif
  59
  60 struct w6692_ch {
  61         struct bchannel         bch;
  62         u32                     addr;
  63         struct timer_list       timer;
  64         u8                      b_mode;
  65 };
  66
  67 struct w6692_hw {
  68         struct list_head        list;
  69         struct pci_dev          *pdev;
  70         char                    name[MISDN_MAX_IDLEN];
  71         u32                     irq;
  72         u32                     irqcnt;
  73         u32                     addr;
  74         u32                     fmask;  /* feature mask - bit set per card nr */
  75         int                     subtype;
  76         spinlock_t              lock;   /* hw lock */
  77         u8                      imask;
  78         u8                      pctl;
  79         u8                      xaddr;
  80         u8                      xdata;
  81         u8                      state;
  82         struct w6692_ch         bc[2];
  83         struct dchannel         dch;
  84         char                    log[64];
  85 };
  86
  87 static LIST_HEAD(Cards);
  88 static DEFINE_RWLOCK(card_lock); /* protect Cards */
  89
  90 static int w6692_cnt;
  91 static int debug;
  92 static u32 led;
  93 static u32 pots;
  94
  95 static void
  96 _set_debug(struct w6692_hw *card)
  97 {
  98         card->dch.debug = debug;
  99         card->bc[0].bch.debug = debug;
 100         card->bc[1].bch.debug = debug;
 101 }
 102
 103 static int
 104 set_debug(const char *val, struct kernel_param *kp)
 105 {
 106         int ret;
 107         struct w6692_hw *card;
 108
 109         ret = param_set_uint(val, kp);
 110         if (!ret) {
 111                 read_lock(&card_lock);
 112                 list_for_each_entry(card, &Cards, list)
 113                         _set_debug(card);
 114                 read_unlock(&card_lock);
 115         }
 116         return ret;
 117 }
 118
 119 MODULE_AUTHOR("Karsten Keil");
 120 MODULE_LICENSE("GPL v2");
 121 MODULE_VERSION(W6692_REV);
 122 module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR);
 123 MODULE_PARM_DESC(debug, "W6692 debug mask");
 124 module_param(led, uint, S_IRUGO | S_IWUSR);
 125 MODULE_PARM_DESC(led, "W6692 LED support bitmask (one bit per card)");
 126 module_param(pots, uint, S_IRUGO | S_IWUSR);
 127 MODULE_PARM_DESC(pots, "W6692 POTS support bitmask (one bit per card)");
 128
 129 static inline u8
 130 ReadW6692(struct w6692_hw *card, u8 offset)
 131 {
 132         return inb(card->addr + offset);
 133 }
 134
 135 static inline void
 136 WriteW6692(struct w6692_hw *card, u8 offset, u8 value)
 137 {
 138         outb(value, card->addr + offset);
 139 }
 140
 141 static inline u8
 142 ReadW6692B(struct w6692_ch *bc, u8 offset)
 143 {
 144         return inb(bc->addr + offset);
 145 }
 146
 147 static inline void
 148 WriteW6692B(struct w6692_ch *bc, u8 offset, u8 value)
 149 {
 150         outb(value, bc->addr + offset);
 151 }
 152
 153 static void
 154 enable_hwirq(struct w6692_hw *card)
 155 {
 156         WriteW6692(card, W_IMASK, card->imask);
 157 }
 158
 159 static void
 160 disable_hwirq(struct w6692_hw *card)
 161 {
 162         WriteW6692(card, W_IMASK, 0xff);
 163 }
 164
 165 static const char *W6692Ver[] = {"V00", "V01", "V10", "V11"};
 166
 167 static void
 168 W6692Version(struct w6692_hw *card)
 169 {
 170         int val;
 171
 172         val = ReadW6692(card, W_D_RBCH);
 173         pr_notice("%s: Winbond W6692 version: %s\n", card->name,
 174                   W6692Ver[(val >> 6) & 3]);
 175 }
 176
 177 static void
 178 w6692_led_handler(struct w6692_hw *card, int on)
 179 {
 180         if ((!(card->fmask & led)) || card->subtype == W6692_USR)
 181                 return;
 182         if (on) {
 183                 card->xdata &= 0xfb;    /*  LED ON */
 184                 WriteW6692(card, W_XDATA, card->xdata);
 185         } else {
 186                 card->xdata |= 0x04;    /*  LED OFF */
 187                 WriteW6692(card, W_XDATA, card->xdata);
 188         }
 189 }
 190
 191 static void
 192 ph_command(struct w6692_hw *card, u8 cmd)
 193 {
 194         pr_debug("%s: ph_command %x\n", card->name, cmd);
 195         WriteW6692(card, W_CIX, cmd);
 196 }
 197
 198 static void
 199 W6692_new_ph(struct w6692_hw *card)
 200 {
 201         if (card->state == W_L1CMD_RST)
 202                 ph_command(card, W_L1CMD_DRC);
 203         schedule_event(&card->dch, FLG_PHCHANGE);
 204 }
 205
 206 static void
 207 W6692_ph_bh(struct dchannel *dch)
 208 {
 209         struct w6692_hw *card = dch->hw;
 210
 211         switch (card->state) {
 212         case W_L1CMD_RST:
 213                 dch->state = 0;
 214                 l1_event(dch->l1, HW_RESET_IND);
 215                 break;
 216         case W_L1IND_CD:
 217                 dch->state = 3;
 218                 l1_event(dch->l1, HW_DEACT_CNF);
 219                 break;
 220         case W_L1IND_DRD:
 221                 dch->state = 3;
 222                 l1_event(dch->l1, HW_DEACT_IND);
 223                 break;
 224         case W_L1IND_CE:
 225                 dch->state = 4;
 226                 l1_event(dch->l1, HW_POWERUP_IND);
 227                 break;
 228         case W_L1IND_LD:
 229                 if (dch->state <= 5) {
 230                         dch->state = 5;
 231                         l1_event(dch->l1, ANYSIGNAL);
 232                 } else {
 233                         dch->state = 8;
 234                         l1_event(dch->l1, LOSTFRAMING);
 235                 }
 236                 break;
 237         case W_L1IND_ARD:
 238                 dch->state = 6;
 239                 l1_event(dch->l1, INFO2);
 240                 break;
 241         case W_L1IND_AI8:
 242                 dch->state = 7;
 243                 l1_event(dch->l1, INFO4_P8);
 244                 break;
 245         case W_L1IND_AI10:
 246                 dch->state = 7;
 247                 l1_event(dch->l1, INFO4_P10);
 248                 break;
 249         default:
 250                 pr_debug("%s: TE unknown state %02x dch state %02x\n",
 251                          card->name, card->state, dch->state);
 252                 break;
 253         }
 254         pr_debug("%s: TE newstate %02x\n", card->name, dch->state);
 255 }
 256
 257 static void
 258 W6692_empty_Dfifo(struct w6692_hw *card, int count)
 259 {
 260         struct dchannel *dch = &card->dch;
 261         u8 *ptr;
 262
 263         pr_debug("%s: empty_Dfifo %d\n", card->name, count);
 264         if (!dch->rx_skb) {
 265                 dch->rx_skb = mI_alloc_skb(card->dch.maxlen, GFP_ATOMIC);
 266                 if (!dch->rx_skb) {
 267                         pr_info("%s: D receive out of memory\n", card->name);
 268                         WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK);
 269                         return;
 270                 }
 271         }
 272         if ((dch->rx_skb->len + count) >= dch->maxlen) {
 273                 pr_debug("%s: empty_Dfifo overrun %d\n", card->name,
 274                          dch->rx_skb->len + count);
 275                 WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK);
 276                 return;
 277         }
 278         ptr = skb_put(dch->rx_skb, count);
 279         insb(card->addr + W_D_RFIFO, ptr, count);
 280         WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK);
 281         if (debug & DEBUG_HW_DFIFO) {
 282                 snprintf(card->log, 63, "D-recv %s %d ",
 283                          card->name, count);
 284                 print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
 285         }
 286 }
 287
 288 static void
 289 W6692_fill_Dfifo(struct w6692_hw *card)
 290 {
 291         struct dchannel *dch = &card->dch;
 292         int count;
 293         u8 *ptr;
 294         u8 cmd = W_D_CMDR_XMS;
 295
 296         pr_debug("%s: fill_Dfifo\n", card->name);
 297         if (!dch->tx_skb)
 298                 return;
 299         count = dch->tx_skb->len - dch->tx_idx;
 300         if (count <= 0)
 301                 return;
 302         if (count > W_D_FIFO_THRESH)
 303                 count = W_D_FIFO_THRESH;
 304         else
 305                 cmd |= W_D_CMDR_XME;
 306         ptr = dch->tx_skb->data + dch->tx_idx;
 307         dch->tx_idx += count;
 308         outsb(card->addr + W_D_XFIFO, ptr, count);
 309         WriteW6692(card, W_D_CMDR, cmd);
 310         if (test_and_set_bit(FLG_BUSY_TIMER, &dch->Flags)) {
 311                 pr_debug("%s: fill_Dfifo dbusytimer running\n", card->name);
 312                 del_timer(&dch->timer);
 313         }
 314         init_timer(&dch->timer);
 315         dch->timer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ) / 1000);
 316         add_timer(&dch->timer);
 317         if (debug & DEBUG_HW_DFIFO) {
 318                 snprintf(card->log, 63, "D-send %s %d ",
 319                          card->name, count);
 320                 print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
 321         }
 322 }
 323
 324 static void
 325 d_retransmit(struct w6692_hw *card)
 326 {
 327         struct dchannel *dch = &card->dch;
 328
 329         if (test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags))
 330                 del_timer(&dch->timer);
 331 #ifdef FIXME
 332         if (test_and_clear_bit(FLG_L1_BUSY, &dch->Flags))
 333                 dchannel_sched_event(dch, D_CLEARBUSY);
 334 #endif
 335         if (test_bit(FLG_TX_BUSY, &dch->Flags)) {
 336                 /* Restart frame */
 337                 dch->tx_idx = 0;
 338                 W6692_fill_Dfifo(card);
 339         } else if (dch->tx_skb) { /* should not happen */
 340                 pr_info("%s: %s without TX_BUSY\n", card->name, __func__);
 341                 test_and_set_bit(FLG_TX_BUSY, &dch->Flags);
 342                 dch->tx_idx = 0;
 343                 W6692_fill_Dfifo(card);
 344         } else {
 345                 pr_info("%s: XDU no TX_BUSY\n", card->name);
 346                 if (get_next_dframe(dch))
 347                         W6692_fill_Dfifo(card);
 348         }
 349 }
 350
 351 static void
 352 handle_rxD(struct w6692_hw *card) {
 353         u8      stat;
 354         int     count;
 355
 356         stat = ReadW6692(card, W_D_RSTA);
 357         if (stat & (W_D_RSTA_RDOV | W_D_RSTA_CRCE | W_D_RSTA_RMB)) {
 358                 if (stat & W_D_RSTA_RDOV) {
 359                         pr_debug("%s: D-channel RDOV\n", card->name);
 360 #ifdef ERROR_STATISTIC
 361                         card->dch.err_rx++;
 362 #endif
 363                 }
 364                 if (stat & W_D_RSTA_CRCE) {
 365                         pr_debug("%s: D-channel CRC error\n", card->name);
 366 #ifdef ERROR_STATISTIC
 367                         card->dch.err_crc++;
 368 #endif
 369                 }
 370                 if (stat & W_D_RSTA_RMB) {
 371                         pr_debug("%s: D-channel ABORT\n", card->name);
 372 #ifdef ERROR_STATISTIC
 373                         card->dch.err_rx++;
 374 #endif
 375                 }
 376                 if (card->dch.rx_skb)
 377                         dev_kfree_skb(card->dch.rx_skb);
 378                 card->dch.rx_skb = NULL;
 379                 WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK | W_D_CMDR_RRST);
 380         } else {
 381                 count = ReadW6692(card, W_D_RBCL) & (W_D_FIFO_THRESH - 1);
 382                 if (count == 0)
 383                         count = W_D_FIFO_THRESH;
 384                 W6692_empty_Dfifo(card, count);
 385                 recv_Dchannel(&card->dch);
 386         }
 387 }
 388
 389 static void
 390 handle_txD(struct w6692_hw *card) {
 391         if (test_and_clear_bit(FLG_BUSY_TIMER, &card->dch.Flags))
 392                 del_timer(&card->dch.timer);
 393         if (card->dch.tx_skb && card->dch.tx_idx < card->dch.tx_skb->len) {
 394                 W6692_fill_Dfifo(card);
 395         } else {
 396                 if (card->dch.tx_skb)
 397                         dev_kfree_skb(card->dch.tx_skb);
 398                 if (get_next_dframe(&card->dch))
 399                         W6692_fill_Dfifo(card);
 400         }
 401 }
 402
 403 static void
 404 handle_statusD(struct w6692_hw *card)
 405 {
 406         struct dchannel *dch = &card->dch;
 407         u8 exval, v1, cir;
 408
 409         exval = ReadW6692(card, W_D_EXIR);
 410
 411         pr_debug("%s: D_EXIR %02x\n", card->name, exval);
 412         if (exval & (W_D_EXI_XDUN | W_D_EXI_XCOL)) {
 413                 /* Transmit underrun/collision */
 414                 pr_debug("%s: D-channel underrun/collision\n", card->name);
 415 #ifdef ERROR_STATISTIC
 416                 dch->err_tx++;
 417 #endif
 418                 d_retransmit(card);
 419         }
 420         if (exval & W_D_EXI_RDOV) {     /* RDOV */
 421                 pr_debug("%s: D-channel RDOV\n", card->name);
 422                 WriteW6692(card, W_D_CMDR, W_D_CMDR_RRST);
 423         }
 424         if (exval & W_D_EXI_TIN2)       /* TIN2 - never */
 425                 pr_debug("%s: spurious TIN2 interrupt\n", card->name);
 426         if (exval & W_D_EXI_MOC) {      /* MOC - not supported */
 427                 v1 = ReadW6692(card, W_MOSR);
 428                 pr_debug("%s: spurious MOC interrupt MOSR %02x\n",
 429                          card->name, v1);
 430         }
 431         if (exval & W_D_EXI_ISC) {      /* ISC - Level1 change */
 432                 cir = ReadW6692(card, W_CIR);
 433                 pr_debug("%s: ISC CIR %02X\n", card->name, cir);
 434                 if (cir & W_CIR_ICC) {
 435                         v1 = cir & W_CIR_COD_MASK;
 436                         pr_debug("%s: ph_state_change %x -> %x\n", card->name,
 437                                  dch->state, v1);
 438                         card->state = v1;
 439                         if (card->fmask & led) {
 440                                 switch (v1) {
 441                                 case W_L1IND_AI8:
 442                                 case W_L1IND_AI10:
 443                                         w6692_led_handler(card, 1);
 444                                         break;
 445                                 default:
 446                                         w6692_led_handler(card, 0);
 447                                         break;
 448                                 }
 449                         }
 450                         W6692_new_ph(card);
 451                 }
 452                 if (cir & W_CIR_SCC) {
 453                         v1 = ReadW6692(card, W_SQR);
 454                         pr_debug("%s: SCC SQR %02X\n", card->name, v1);
 455                 }
 456         }
 457         if (exval & W_D_EXI_WEXP)
 458                 pr_debug("%s: spurious WEXP interrupt!\n", card->name);
 459         if (exval & W_D_EXI_TEXP)
 460                 pr_debug("%s: spurious TEXP interrupt!\n", card->name);
 461 }
 462
 463 static void
 464 W6692_empty_Bfifo(struct w6692_ch *wch, int count)
 465 {
 466         struct w6692_hw *card = wch->bch.hw;
 467         u8 *ptr;
 468         int maxlen;
 469
 470         pr_debug("%s: empty_Bfifo %d\n", card->name, count);
 471         if (unlikely(wch->bch.state == ISDN_P_NONE)) {
 472                 pr_debug("%s: empty_Bfifo ISDN_P_NONE\n", card->name);
 473                 WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
 474                 if (wch->bch.rx_skb)
 475                         skb_trim(wch->bch.rx_skb, 0);
 476                 return;
 477         }
 478         if (test_bit(FLG_RX_OFF, &wch->bch.Flags)) {
 479                 wch->bch.dropcnt += count;
 480                 WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
 481                 return;
 482         }
 483         maxlen = bchannel_get_rxbuf(&wch->bch, count);
 484         if (maxlen < 0) {
 485                 WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
 486                 if (wch->bch.rx_skb)
 487                         skb_trim(wch->bch.rx_skb, 0);
 488                 pr_warning("%s.B%d: No bufferspace for %d bytes\n",
 489                            card->name, wch->bch.nr, count);
 490                 return;
 491         }
 492         ptr = skb_put(wch->bch.rx_skb, count);
 493         insb(wch->addr + W_B_RFIFO, ptr, count);
 494         WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
 495         if (debug & DEBUG_HW_DFIFO) {
 496                 snprintf(card->log, 63, "B%1d-recv %s %d ",
 497                          wch->bch.nr, card->name, count);
 498                 print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
 499         }
 500 }
 501
 502 static void
 503 W6692_fill_Bfifo(struct w6692_ch *wch)
 504 {
 505         struct w6692_hw *card = wch->bch.hw;
 506         int count, fillempty = 0;
 507         u8 *ptr, cmd = W_B_CMDR_RACT | W_B_CMDR_XMS;
 508
 509         pr_debug("%s: fill Bfifo\n", card->name);
 510         if (!wch->bch.tx_skb) {
 511                 if (!test_bit(FLG_TX_EMPTY, &wch->bch.Flags))
 512                         return;
 513                 ptr = wch->bch.fill;
 514                 count = W_B_FIFO_THRESH;
 515                 fillempty = 1;
 516         } else {
 517                 count = wch->bch.tx_skb->len - wch->bch.tx_idx;
 518                 if (count <= 0)
 519                         return;
 520                 ptr = wch->bch.tx_skb->data + wch->bch.tx_idx;
 521         }
 522         if (count > W_B_FIFO_THRESH)
 523                 count = W_B_FIFO_THRESH;
 524         else if (test_bit(FLG_HDLC, &wch->bch.Flags))
 525                 cmd |= W_B_CMDR_XME;
 526
 527         pr_debug("%s: fill Bfifo%d/%d\n", card->name,
 528                  count, wch->bch.tx_idx);
 529         wch->bch.tx_idx += count;
 530         if (fillempty) {
 531                 while (count > 0) {
 532                         outsb(wch->addr + W_B_XFIFO, ptr, MISDN_BCH_FILL_SIZE);
 533                         count -= MISDN_BCH_FILL_SIZE;
 534                 }
 535         } else {
 536                 outsb(wch->addr + W_B_XFIFO, ptr, count);
 537         }
 538         WriteW6692B(wch, W_B_CMDR, cmd);
 539         if ((debug & DEBUG_HW_BFIFO) && !fillempty) {
 540                 snprintf(card->log, 63, "B%1d-send %s %d ",
 541                          wch->bch.nr, card->name, count);
 542                 print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
 543         }
 544 }
 545
 546 #if 0
 547 static int
 548 setvolume(struct w6692_ch *wch, int mic, struct sk_buff *skb)
 549 {
 550         struct w6692_hw *card = wch->bch.hw;
 551         u16 *vol = (u16 *)skb->data;
 552         u8 val;
 553
 554         if ((!(card->fmask & pots)) ||
 555             !test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
 556                 return -ENODEV;
 557         if (skb->len < 2)
 558                 return -EINVAL;
 559         if (*vol > 7)
 560                 return -EINVAL;
 561         val = *vol & 7;
 562         val = 7 - val;
 563         if (mic) {
 564                 val <<= 3;
 565                 card->xaddr &= 0xc7;
 566         } else {
 567                 card->xaddr &= 0xf8;
 568         }
 569         card->xaddr |= val;
 570         WriteW6692(card, W_XADDR, card->xaddr);
 571         return 0;
 572 }
 573
 574 static int
 575 enable_pots(struct w6692_ch *wch)
 576 {
 577         struct w6692_hw *card = wch->bch.hw;
 578
 579         if ((!(card->fmask & pots)) ||
 580             !test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
 581                 return -ENODEV;
 582         wch->b_mode |= W_B_MODE_EPCM | W_B_MODE_BSW0;
 583         WriteW6692B(wch, W_B_MODE, wch->b_mode);
 584         WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
 585         card->pctl |= ((wch->bch.nr & 2) ? W_PCTL_PCX : 0);
 586         WriteW6692(card, W_PCTL, card->pctl);
 587         return 0;
 588 }
 589 #endif
 590
 591 static int
 592 disable_pots(struct w6692_ch *wch)
 593 {
 594         struct w6692_hw *card = wch->bch.hw;
 595
 596         if (!(card->fmask & pots))
 597                 return -ENODEV;
 598         wch->b_mode &= ~(W_B_MODE_EPCM | W_B_MODE_BSW0);
 599         WriteW6692B(wch, W_B_MODE, wch->b_mode);
 600         WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_RACT |
 601                     W_B_CMDR_XRST);
 602         return 0;
 603 }
 604
 605 static int
 606 w6692_mode(struct w6692_ch *wch, u32 pr)
 607 {
 608         struct w6692_hw *card;
 609
 610         card = wch->bch.hw;
 611         pr_debug("%s: B%d protocol %x-->%x\n", card->name,
 612                  wch->bch.nr, wch->bch.state, pr);
 613         switch (pr) {
 614         case ISDN_P_NONE:
 615                 if ((card->fmask & pots) && (wch->b_mode & W_B_MODE_EPCM))
 616                         disable_pots(wch);
 617                 wch->b_mode = 0;
 618                 mISDN_clear_bchannel(&wch->bch);
 619                 WriteW6692B(wch, W_B_MODE, wch->b_mode);
 620                 WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
 621                 test_and_clear_bit(FLG_HDLC, &wch->bch.Flags);
 622                 test_and_clear_bit(FLG_TRANSPARENT, &wch->bch.Flags);
 623                 break;
 624         case ISDN_P_B_RAW:
 625                 wch->b_mode = W_B_MODE_MMS;
 626                 WriteW6692B(wch, W_B_MODE, wch->b_mode);
 627                 WriteW6692B(wch, W_B_EXIM, 0);
 628                 WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_RACT |
 629                             W_B_CMDR_XRST);
 630                 test_and_set_bit(FLG_TRANSPARENT, &wch->bch.Flags);
 631                 break;
 632         case ISDN_P_B_HDLC:
 633                 wch->b_mode = W_B_MODE_ITF;
 634                 WriteW6692B(wch, W_B_MODE, wch->b_mode);
 635                 WriteW6692B(wch, W_B_ADM1, 0xff);
 636                 WriteW6692B(wch, W_B_ADM2, 0xff);
 637                 WriteW6692B(wch, W_B_EXIM, 0);
 638                 WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_RACT |
 639                             W_B_CMDR_XRST);
 640                 test_and_set_bit(FLG_HDLC, &wch->bch.Flags);
 641                 break;
 642         default:
 643                 pr_info("%s: protocol %x not known\n", card->name, pr);
 644                 return -ENOPROTOOPT;
 645         }
 646         wch->bch.state = pr;
 647         return 0;
 648 }
 649
 650 static void
 651 send_next(struct w6692_ch *wch)
 652 {
 653         if (wch->bch.tx_skb && wch->bch.tx_idx < wch->bch.tx_skb->len) {
 654                 W6692_fill_Bfifo(wch);
 655         } else {
 656                 if (wch->bch.tx_skb)
 657                         dev_kfree_skb(wch->bch.tx_skb);
 658                 if (get_next_bframe(&wch->bch)) {
 659                         W6692_fill_Bfifo(wch);
 660                         test_and_clear_bit(FLG_TX_EMPTY, &wch->bch.Flags);
 661                 } else if (test_bit(FLG_TX_EMPTY, &wch->bch.Flags)) {
 662                         W6692_fill_Bfifo(wch);
 663                 }
 664         }
 665 }
 666
 667 static void
 668 W6692B_interrupt(struct w6692_hw *card, int ch)
 669 {
 670         struct w6692_ch *wch = &card->bc[ch];
 671         int             count;
 672         u8              stat, star = 0;
 673
 674         stat = ReadW6692B(wch, W_B_EXIR);
 675         pr_debug("%s: B%d EXIR %02x\n", card->name, wch->bch.nr, stat);
 676         if (stat & W_B_EXI_RME) {
 677                 star = ReadW6692B(wch, W_B_STAR);
 678                 if (star & (W_B_STAR_RDOV | W_B_STAR_CRCE | W_B_STAR_RMB)) {
 679                         if ((star & W_B_STAR_RDOV) &&
 680                             test_bit(FLG_ACTIVE, &wch->bch.Flags)) {
 681                                 pr_debug("%s: B%d RDOV proto=%x\n", card->name,
 682                                          wch->bch.nr, wch->bch.state);
 683 #ifdef ERROR_STATISTIC
 684                                 wch->bch.err_rdo++;
 685 #endif
 686                         }
 687                         if (test_bit(FLG_HDLC, &wch->bch.Flags)) {
 688                                 if (star & W_B_STAR_CRCE) {
 689                                         pr_debug("%s: B%d CRC error\n",
 690                                                  card->name, wch->bch.nr);
 691 #ifdef ERROR_STATISTIC
 692                                         wch->bch.err_crc++;
 693 #endif
 694                                 }
 695                                 if (star & W_B_STAR_RMB) {
 696                                         pr_debug("%s: B%d message abort\n",
 697                                                  card->name, wch->bch.nr);
 698 #ifdef ERROR_STATISTIC
 699                                         wch->bch.err_inv++;
 700 #endif
 701                                 }
 702                         }
 703                         WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK |
 704                                     W_B_CMDR_RRST | W_B_CMDR_RACT);
 705                         if (wch->bch.rx_skb)
 706                                 skb_trim(wch->bch.rx_skb, 0);
 707                 } else {
 708                         count = ReadW6692B(wch, W_B_RBCL) &
 709                                 (W_B_FIFO_THRESH - 1);
 710                         if (count == 0)
 711                                 count = W_B_FIFO_THRESH;
 712                         W6692_empty_Bfifo(wch, count);
 713                         recv_Bchannel(&wch->bch, 0, false);
 714                 }
 715         }
 716         if (stat & W_B_EXI_RMR) {
 717                 if (!(stat & W_B_EXI_RME))
 718                         star = ReadW6692B(wch, W_B_STAR);
 719                 if (star & W_B_STAR_RDOV) {
 720                         pr_debug("%s: B%d RDOV proto=%x\n", card->name,
 721                                  wch->bch.nr, wch->bch.state);
 722 #ifdef ERROR_STATISTIC
 723                         wch->bch.err_rdo++;
 724 #endif
 725                         WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK |
 726                                     W_B_CMDR_RRST | W_B_CMDR_RACT);
 727                 } else {
 728                         W6692_empty_Bfifo(wch, W_B_FIFO_THRESH);
 729                         if (test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
 730                                 recv_Bchannel(&wch->bch, 0, false);
 731                 }
 732         }
 733         if (stat & W_B_EXI_RDOV) {
 734                 /* only if it is not handled yet */
 735                 if (!(star & W_B_STAR_RDOV)) {
 736                         pr_debug("%s: B%d RDOV IRQ proto=%x\n", card->name,
 737                                  wch->bch.nr, wch->bch.state);
 738 #ifdef ERROR_STATISTIC
 739                         wch->bch.err_rdo++;
 740 #endif
 741                         WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK |
 742                                     W_B_CMDR_RRST | W_B_CMDR_RACT);
 743                 }
 744         }
 745         if (stat & W_B_EXI_XFR) {
 746                 if (!(stat & (W_B_EXI_RME | W_B_EXI_RMR))) {
 747                         star = ReadW6692B(wch, W_B_STAR);
 748                         pr_debug("%s: B%d star %02x\n", card->name,
 749                                  wch->bch.nr, star);
 750                 }
 751                 if (star & W_B_STAR_XDOW) {
 752                         pr_warning("%s: B%d XDOW proto=%x\n", card->name,
 753                                    wch->bch.nr, wch->bch.state);
 754 #ifdef ERROR_STATISTIC
 755                         wch->bch.err_xdu++;
 756 #endif
 757                         WriteW6692B(wch, W_B_CMDR, W_B_CMDR_XRST |
 758                                     W_B_CMDR_RACT);
 759                         /* resend */
 760                         if (wch->bch.tx_skb) {
 761                                 if (!test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
 762                                         wch->bch.tx_idx = 0;
 763                         }
 764                 }
 765                 send_next(wch);
 766                 if (star & W_B_STAR_XDOW)
 767                         return; /* handle XDOW only once */
 768         }
 769         if (stat & W_B_EXI_XDUN) {
 770                 pr_warning("%s: B%d XDUN proto=%x\n", card->name,
 771                            wch->bch.nr, wch->bch.state);
 772 #ifdef ERROR_STATISTIC
 773                 wch->bch.err_xdu++;
 774 #endif
 775                 /* resend - no XRST needed */
 776                 if (wch->bch.tx_skb) {
 777                         if (!test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
 778                                 wch->bch.tx_idx = 0;
 779                 } else if (test_bit(FLG_FILLEMPTY, &wch->bch.Flags)) {
 780                         test_and_set_bit(FLG_TX_EMPTY, &wch->bch.Flags);
 781                 }
 782                 send_next(wch);
 783         }
 784 }
 785
 786 static irqreturn_t
 787 w6692_irq(int intno, void *dev_id)
 788 {
 789         struct w6692_hw *card = dev_id;
 790         u8              ista;
 791
 792         spin_lock(&card->lock);
 793         ista = ReadW6692(card, W_ISTA);
 794         if ((ista | card->imask) == card->imask) {
 795                 /* possible a shared  IRQ reqest */
 796                 spin_unlock(&card->lock);
 797                 return IRQ_NONE;
 798         }
 799         card->irqcnt++;
 800         pr_debug("%s: ista %02x\n", card->name, ista);
 801         ista &= ~card->imask;
 802         if (ista & W_INT_B1_EXI)
 803                 W6692B_interrupt(card, 0);
 804         if (ista & W_INT_B2_EXI)
 805                 W6692B_interrupt(card, 1);
 806         if (ista & W_INT_D_RME)
 807                 handle_rxD(card);
 808         if (ista & W_INT_D_RMR)
 809                 W6692_empty_Dfifo(card, W_D_FIFO_THRESH);
 810         if (ista & W_INT_D_XFR)
 811                 handle_txD(card);
 812         if (ista & W_INT_D_EXI)
 813                 handle_statusD(card);
 814         if (ista & (W_INT_XINT0 | W_INT_XINT1)) /* XINT0/1 - never */
 815                 pr_debug("%s: W6692 spurious XINT!\n", card->name);
 816 /* End IRQ Handler */
 817         spin_unlock(&card->lock);
 818         return IRQ_HANDLED;
 819 }
 820
 821 static void
 822 dbusy_timer_handler(struct dchannel *dch)
 823 {
 824         struct w6692_hw *card = dch->hw;
 825         int             rbch, star;
 826         u_long          flags;
 827
 828         if (test_bit(FLG_BUSY_TIMER, &dch->Flags)) {
 829                 spin_lock_irqsave(&card->lock, flags);
 830                 rbch = ReadW6692(card, W_D_RBCH);
 831                 star = ReadW6692(card, W_D_STAR);
 832                 pr_debug("%s: D-Channel Busy RBCH %02x STAR %02x\n",
 833                          card->name, rbch, star);
 834                 if (star & W_D_STAR_XBZ)        /* D-Channel Busy */
 835                         test_and_set_bit(FLG_L1_BUSY, &dch->Flags);
 836                 else {
 837                         /* discard frame; reset transceiver */
 838                         test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags);
 839                         if (dch->tx_idx)
 840                                 dch->tx_idx = 0;
 841                         else
 842                                 pr_info("%s: W6692 D-Channel Busy no tx_idx\n",
 843                                         card->name);
 844                         /* Transmitter reset */
 845                         WriteW6692(card, W_D_CMDR, W_D_CMDR_XRST);
 846                 }
 847                 spin_unlock_irqrestore(&card->lock, flags);
 848         }
 849 }
 850
 851 void initW6692(struct w6692_hw *card)
 852 {
 853         u8      val;
 854
 855         card->dch.timer.function = (void *)dbusy_timer_handler;
 856         card->dch.timer.data = (u_long)&card->dch;
 857         init_timer(&card->dch.timer);
 858         w6692_mode(&card->bc[0], ISDN_P_NONE);
 859         w6692_mode(&card->bc[1], ISDN_P_NONE);
 860         WriteW6692(card, W_D_CTL, 0x00);
 861         disable_hwirq(card);
 862         WriteW6692(card, W_D_SAM, 0xff);
 863         WriteW6692(card, W_D_TAM, 0xff);
 864         WriteW6692(card, W_D_MODE, W_D_MODE_RACT);
 865         card->state = W_L1CMD_RST;
 866         ph_command(card, W_L1CMD_RST);
 867         ph_command(card, W_L1CMD_ECK);
 868         /* enable all IRQ but extern */
 869         card->imask = 0x18;
 870         WriteW6692(card, W_D_EXIM, 0x00);
 871         WriteW6692B(&card->bc[0], W_B_EXIM, 0);
 872         WriteW6692B(&card->bc[1], W_B_EXIM, 0);
 873         /* Reset D-chan receiver and transmitter */
 874         WriteW6692(card, W_D_CMDR, W_D_CMDR_RRST | W_D_CMDR_XRST);
 875         /* Reset B-chan receiver and transmitter */
 876         WriteW6692B(&card->bc[0], W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
 877         WriteW6692B(&card->bc[1], W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
 878         /* enable peripheral */
 879         if (card->subtype == W6692_USR) {
 880                 /* seems that USR implemented some power control features
 881                  * Pin 79 is connected to the oscilator circuit so we
 882                  * have to handle it here
 883                  */
 884                 card->pctl = 0x80;
 885                 card->xdata = 0;
 886                 WriteW6692(card, W_PCTL, card->pctl);
 887                 WriteW6692(card, W_XDATA, card->xdata);
 888         } else {
 889                 card->pctl = W_PCTL_OE5 | W_PCTL_OE4 | W_PCTL_OE2 |
 890                         W_PCTL_OE1 | W_PCTL_OE0;
 891                 card->xaddr = 0x00;/* all sw off */
 892                 if (card->fmask & pots)
 893                         card->xdata |= 0x06;    /*  POWER UP/ LED OFF / ALAW */
 894                 if (card->fmask & led)
 895                         card->xdata |= 0x04;    /* LED OFF */
 896                 if ((card->fmask & pots) || (card->fmask & led)) {
 897                         WriteW6692(card, W_PCTL, card->pctl);
 898                         WriteW6692(card, W_XADDR, card->xaddr);
 899                         WriteW6692(card, W_XDATA, card->xdata);
 900                         val = ReadW6692(card, W_XADDR);
 901                         if (debug & DEBUG_HW)
 902                                 pr_notice("%s: W_XADDR=%02x\n",
 903                                           card->name, val);
 904                 }
 905         }
 906 }
 907
 908 static void
 909 reset_w6692(struct w6692_hw *card)
 910 {
 911         WriteW6692(card, W_D_CTL, W_D_CTL_SRST);
 912         mdelay(10);
 913         WriteW6692(card, W_D_CTL, 0);
 914 }
 915
 916 static int
 917 init_card(struct w6692_hw *card)
 918 {
 919         int     cnt = 3;
 920         u_long  flags;
 921
 922         spin_lock_irqsave(&card->lock, flags);
 923         disable_hwirq(card);
 924         spin_unlock_irqrestore(&card->lock, flags);
 925         if (request_irq(card->irq, w6692_irq, IRQF_SHARED, card->name, card)) {
 926                 pr_info("%s: couldn't get interrupt %d\n", card->name,
 927                         card->irq);
 928                 return -EIO;
 929         }
 930         while (cnt--) {
 931                 spin_lock_irqsave(&card->lock, flags);
 932                 initW6692(card);
 933                 enable_hwirq(card);
 934                 spin_unlock_irqrestore(&card->lock, flags);
 935                 /* Timeout 10ms */
 936                 msleep_interruptible(10);
 937                 if (debug & DEBUG_HW)
 938                         pr_notice("%s: IRQ %d count %d\n", card->name,
 939                                   card->irq, card->irqcnt);
 940                 if (!card->irqcnt) {
 941                         pr_info("%s: IRQ(%d) getting no IRQs during init %d\n",
 942                                 card->name, card->irq, 3 - cnt);
 943                         reset_w6692(card);
 944                 } else
 945                         return 0;
 946         }
 947         free_irq(card->irq, card);
 948         return -EIO;
 949 }
 950
 951 static int
 952 w6692_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
 953 {
 954         struct bchannel *bch = container_of(ch, struct bchannel, ch);
 955         struct w6692_ch *bc = container_of(bch, struct w6692_ch, bch);
 956         struct w6692_hw *card = bch->hw;
 957         int ret = -EINVAL;
 958         struct mISDNhead *hh = mISDN_HEAD_P(skb);
 959         unsigned long flags;
 960
 961         switch (hh->prim) {
 962         case PH_DATA_REQ:
 963                 spin_lock_irqsave(&card->lock, flags);
 964                 ret = bchannel_senddata(bch, skb);
 965                 if (ret > 0) { /* direct TX */
 966                         ret = 0;
 967                         W6692_fill_Bfifo(bc);
 968                 }
 969                 spin_unlock_irqrestore(&card->lock, flags);
 970                 return ret;
 971         case PH_ACTIVATE_REQ:
 972                 spin_lock_irqsave(&card->lock, flags);
 973                 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags))
 974                         ret = w6692_mode(bc, ch->protocol);
 975                 else
 976                         ret = 0;
 977                 spin_unlock_irqrestore(&card->lock, flags);
 978                 if (!ret)
 979                         _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
 980                                     NULL, GFP_KERNEL);
 981                 break;
 982         case PH_DEACTIVATE_REQ:
 983                 spin_lock_irqsave(&card->lock, flags);
 984                 mISDN_clear_bchannel(bch);
 985                 w6692_mode(bc, ISDN_P_NONE);
 986                 spin_unlock_irqrestore(&card->lock, flags);
 987                 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
 988                             NULL, GFP_KERNEL);
 989                 ret = 0;
 990                 break;
 991         default:
 992                 pr_info("%s: %s unknown prim(%x,%x)\n",
 993                         card->name, __func__, hh->prim, hh->id);
 994                 ret = -EINVAL;
 995         }
 996         if (!ret)
 997                 dev_kfree_skb(skb);
 998         return ret;
 999 }
1000
1001 static int
1002 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
1003 {
1004         return mISDN_ctrl_bchannel(bch, cq);
1005 }
1006
1007 static int
1008 open_bchannel(struct w6692_hw *card, struct channel_req *rq)
1009 {
1010         struct bchannel *bch;
1011
1012         if (rq->adr.channel == 0 || rq->adr.channel > 2)
1013                 return -EINVAL;
1014         if (rq->protocol == ISDN_P_NONE)
1015                 return -EINVAL;
1016         bch = &card->bc[rq->adr.channel - 1].bch;
1017         if (test_and_set_bit(FLG_OPEN, &bch->Flags))
1018                 return -EBUSY; /* b-channel can be only open once */
1019         bch->ch.protocol = rq->protocol;
1020         rq->ch = &bch->ch;
1021         return 0;
1022 }
1023
1024 static int
1025 channel_ctrl(struct w6692_hw *card, struct mISDN_ctrl_req *cq)
1026 {
1027         int     ret = 0;
1028
1029         switch (cq->op) {
1030         case MISDN_CTRL_GETOP:
1031                 cq->op = MISDN_CTRL_L1_TIMER3;
1032                 break;
1033         case MISDN_CTRL_L1_TIMER3:
1034                 ret = l1_event(card->dch.l1, HW_TIMER3_VALUE | (cq->p1 & 0xff));
1035                 break;
1036         default:
1037                 pr_info("%s: unknown CTRL OP %x\n", card->name, cq->op);
1038                 ret = -EINVAL;
1039                 break;
1040         }
1041         return ret;
1042 }
1043
1044 static int
1045 w6692_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
1046 {
1047         struct bchannel *bch = container_of(ch, struct bchannel, ch);
1048         struct w6692_ch *bc = container_of(bch, struct w6692_ch, bch);
1049         struct w6692_hw *card = bch->hw;
1050         int ret = -EINVAL;
1051         u_long flags;
1052
1053         pr_debug("%s: %s cmd:%x %p\n", card->name, __func__, cmd, arg);
1054         switch (cmd) {
1055         case CLOSE_CHANNEL:
1056                 test_and_clear_bit(FLG_OPEN, &bch->Flags);
1057                 cancel_work_sync(&bch->workq);
1058                 spin_lock_irqsave(&card->lock, flags);
1059                 mISDN_clear_bchannel(bch);
1060                 w6692_mode(bc, ISDN_P_NONE);
1061                 spin_unlock_irqrestore(&card->lock, flags);
1062                 ch->protocol = ISDN_P_NONE;
1063                 ch->peer = NULL;
1064                 module_put(THIS_MODULE);
1065                 ret = 0;
1066                 break;
1067         case CONTROL_CHANNEL:
1068                 ret = channel_bctrl(bch, arg);
1069                 break;
1070         default:
1071                 pr_info("%s: %s unknown prim(%x)\n",
1072                         card->name, __func__, cmd);
1073         }
1074         return ret;
1075 }
1076
1077 static int
1078 w6692_l2l1D(struct mISDNchannel *ch, struct sk_buff *skb)
1079 {
1080         struct mISDNdevice      *dev = container_of(ch, struct mISDNdevice, D);
1081         struct dchannel         *dch = container_of(dev, struct dchannel, dev);
1082         struct w6692_hw         *card = container_of(dch, struct w6692_hw, dch);
1083         int                     ret = -EINVAL;
1084         struct mISDNhead        *hh = mISDN_HEAD_P(skb);
1085         u32                     id;
1086         u_long                  flags;
1087
1088         switch (hh->prim) {
1089         case PH_DATA_REQ:
1090                 spin_lock_irqsave(&card->lock, flags);
1091                 ret = dchannel_senddata(dch, skb);
1092                 if (ret > 0) { /* direct TX */
1093                         id = hh->id; /* skb can be freed */
1094                         W6692_fill_Dfifo(card);
1095                         ret = 0;
1096                         spin_unlock_irqrestore(&card->lock, flags);
1097                         queue_ch_frame(ch, PH_DATA_CNF, id, NULL);
1098                 } else
1099                         spin_unlock_irqrestore(&card->lock, flags);
1100                 return ret;
1101         case PH_ACTIVATE_REQ:
1102                 ret = l1_event(dch->l1, hh->prim);
1103                 break;
1104         case PH_DEACTIVATE_REQ:
1105                 test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags);
1106                 ret = l1_event(dch->l1, hh->prim);
1107                 break;
1108         }
1109
1110         if (!ret)
1111                 dev_kfree_skb(skb);
1112         return ret;
1113 }
1114
1115 static int
1116 w6692_l1callback(struct dchannel *dch, u32 cmd)
1117 {
1118         struct w6692_hw *card = container_of(dch, struct w6692_hw, dch);
1119         u_long flags;
1120
1121         pr_debug("%s: cmd(%x) state(%02x)\n", card->name, cmd, card->state);
1122         switch (cmd) {
1123         case INFO3_P8:
1124                 spin_lock_irqsave(&card->lock, flags);
1125                 ph_command(card, W_L1CMD_AR8);
1126                 spin_unlock_irqrestore(&card->lock, flags);
1127                 break;
1128         case INFO3_P10:
1129                 spin_lock_irqsave(&card->lock, flags);
1130                 ph_command(card, W_L1CMD_AR10);
1131                 spin_unlock_irqrestore(&card->lock, flags);
1132                 break;
1133         case HW_RESET_REQ:
1134                 spin_lock_irqsave(&card->lock, flags);
1135                 if (card->state != W_L1IND_DRD)
1136                         ph_command(card, W_L1CMD_RST);
1137                 ph_command(card, W_L1CMD_ECK);
1138                 spin_unlock_irqrestore(&card->lock, flags);
1139                 break;
1140         case HW_DEACT_REQ:
1141                 skb_queue_purge(&dch->squeue);
1142                 if (dch->tx_skb) {
1143                         dev_kfree_skb(dch->tx_skb);
1144                         dch->tx_skb = NULL;
1145                 }
1146                 dch->tx_idx = 0;
1147                 if (dch->rx_skb) {
1148                         dev_kfree_skb(dch->rx_skb);
1149                         dch->rx_skb = NULL;
1150                 }
1151                 test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
1152                 if (test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags))
1153                         del_timer(&dch->timer);
1154                 break;
1155         case HW_POWERUP_REQ:
1156                 spin_lock_irqsave(&card->lock, flags);
1157                 ph_command(card, W_L1CMD_ECK);
1158                 spin_unlock_irqrestore(&card->lock, flags);
1159                 break;
1160         case PH_ACTIVATE_IND:
1161                 test_and_set_bit(FLG_ACTIVE, &dch->Flags);
1162                 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
1163                             GFP_ATOMIC);
1164                 break;
1165         case PH_DEACTIVATE_IND:
1166                 test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
1167                 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
1168                             GFP_ATOMIC);
1169                 break;
1170         default:
1171                 pr_debug("%s: %s unknown command %x\n", card->name,
1172                          __func__, cmd);
1173                 return -1;
1174         }
1175         return 0;
1176 }
1177
1178 static int
1179 open_dchannel(struct w6692_hw *card, struct channel_req *rq, void *caller)
1180 {
1181         pr_debug("%s: %s dev(%d) open from %p\n", card->name, __func__,
1182                  card->dch.dev.id, caller);
1183         if (rq->protocol != ISDN_P_TE_S0)
1184                 return -EINVAL;
1185         if (rq->adr.channel == 1)
1186                 /* E-Channel not supported */
1187                 return -EINVAL;
1188         rq->ch = &card->dch.dev.D;
1189         rq->ch->protocol = rq->protocol;
1190         if (card->dch.state == 7)
1191                 _queue_data(rq->ch, PH_ACTIVATE_IND, MISDN_ID_ANY,
1192                             0, NULL, GFP_KERNEL);
1193         return 0;
1194 }
1195
1196 static int
1197 w6692_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
1198 {
1199         struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
1200         struct dchannel *dch = container_of(dev, struct dchannel, dev);
1201         struct w6692_hw *card = container_of(dch, struct w6692_hw, dch);
1202         struct channel_req *rq;
1203         int err = 0;
1204
1205         pr_debug("%s: DCTRL: %x %p\n", card->name, cmd, arg);
1206         switch (cmd) {
1207         case OPEN_CHANNEL:
1208                 rq = arg;
1209                 if (rq->protocol == ISDN_P_TE_S0)
1210                         err = open_dchannel(card, rq, __builtin_return_address(0));
1211                 else
1212                         err = open_bchannel(card, rq);
1213                 if (err)
1214                         break;
1215                 if (!try_module_get(THIS_MODULE))
1216                         pr_info("%s: cannot get module\n", card->name);
1217                 break;
1218         case CLOSE_CHANNEL:
1219                 pr_debug("%s: dev(%d) close from %p\n", card->name,
1220                          dch->dev.id, __builtin_return_address(0));
1221                 module_put(THIS_MODULE);
1222                 break;
1223         case CONTROL_CHANNEL:
1224                 err = channel_ctrl(card, arg);
1225                 break;
1226         default:
1227                 pr_debug("%s: unknown DCTRL command %x\n", card->name, cmd);
1228                 return -EINVAL;
1229         }
1230         return err;
1231 }
1232
1233 static int
1234 setup_w6692(struct w6692_hw *card)
1235 {
1236         u32     val;
1237
1238         if (!request_region(card->addr, 256, card->name)) {
1239                 pr_info("%s: config port %x-%x already in use\n", card->name,
1240                         card->addr, card->addr + 255);
1241                 return -EIO;
1242         }
1243         W6692Version(card);
1244         card->bc[0].addr = card->addr;
1245         card->bc[1].addr = card->addr + 0x40;
1246         val = ReadW6692(card, W_ISTA);
1247         if (debug & DEBUG_HW)
1248                 pr_notice("%s ISTA=%02x\n", card->name, val);
1249         val = ReadW6692(card, W_IMASK);
1250         if (debug & DEBUG_HW)
1251                 pr_notice("%s IMASK=%02x\n", card->name, val);
1252         val = ReadW6692(card, W_D_EXIR);
1253         if (debug & DEBUG_HW)
1254                 pr_notice("%s D_EXIR=%02x\n", card->name, val);
1255         val = ReadW6692(card, W_D_EXIM);
1256         if (debug & DEBUG_HW)
1257                 pr_notice("%s D_EXIM=%02x\n", card->name, val);
1258         val = ReadW6692(card, W_D_RSTA);
1259         if (debug & DEBUG_HW)
1260                 pr_notice("%s D_RSTA=%02x\n", card->name, val);
1261         return 0;
1262 }
1263
1264 static void
1265 release_card(struct w6692_hw *card)
1266 {
1267         u_long  flags;
1268
1269         spin_lock_irqsave(&card->lock, flags);
1270         disable_hwirq(card);
1271         w6692_mode(&card->bc[0], ISDN_P_NONE);
1272         w6692_mode(&card->bc[1], ISDN_P_NONE);
1273         if ((card->fmask & led) || card->subtype == W6692_USR) {
1274                 card->xdata |= 0x04;    /*  LED OFF */
1275                 WriteW6692(card, W_XDATA, card->xdata);
1276         }
1277         spin_unlock_irqrestore(&card->lock, flags);
1278         free_irq(card->irq, card);
1279         l1_event(card->dch.l1, CLOSE_CHANNEL);
1280         mISDN_unregister_device(&card->dch.dev);
1281         release_region(card->addr, 256);
1282         mISDN_freebchannel(&card->bc[1].bch);
1283         mISDN_freebchannel(&card->bc[0].bch);
1284         mISDN_freedchannel(&card->dch);
1285         write_lock_irqsave(&card_lock, flags);
1286         list_del(&card->list);
1287         write_unlock_irqrestore(&card_lock, flags);
1288         pci_disable_device(card->pdev);
1289         pci_set_drvdata(card->pdev, NULL);
1290         kfree(card);
1291 }
1292
1293 static int
1294 setup_instance(struct w6692_hw *card)
1295 {
1296         int             i, err;
1297         u_long          flags;
1298
1299         snprintf(card->name, MISDN_MAX_IDLEN - 1, "w6692.%d", w6692_cnt + 1);
1300         write_lock_irqsave(&card_lock, flags);
1301         list_add_tail(&card->list, &Cards);
1302         write_unlock_irqrestore(&card_lock, flags);
1303         card->fmask = (1 << w6692_cnt);
1304         _set_debug(card);
1305         spin_lock_init(&card->lock);
1306         mISDN_initdchannel(&card->dch, MAX_DFRAME_LEN_L1, W6692_ph_bh);
1307         card->dch.dev.Dprotocols = (1 << ISDN_P_TE_S0);
1308         card->dch.dev.D.send = w6692_l2l1D;
1309         card->dch.dev.D.ctrl = w6692_dctrl;
1310         card->dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
1311                 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
1312         card->dch.hw = card;
1313         card->dch.dev.nrbchan = 2;
1314         for (i = 0; i < 2; i++) {
1315                 mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM,
1316                                    W_B_FIFO_THRESH);
1317                 card->bc[i].bch.hw = card;
1318                 card->bc[i].bch.nr = i + 1;
1319                 card->bc[i].bch.ch.nr = i + 1;
1320                 card->bc[i].bch.ch.send = w6692_l2l1B;
1321                 card->bc[i].bch.ch.ctrl = w6692_bctrl;
1322                 set_channelmap(i + 1, card->dch.dev.channelmap);
1323                 list_add(&card->bc[i].bch.ch.list, &card->dch.dev.bchannels);
1324         }
1325         err = setup_w6692(card);
1326         if (err)
1327                 goto error_setup;
1328         err = mISDN_register_device(&card->dch.dev, &card->pdev->dev,
1329                                     card->name);
1330         if (err)
1331                 goto error_reg;
1332         err = init_card(card);
1333         if (err)
1334                 goto error_init;
1335         err = create_l1(&card->dch, w6692_l1callback);
1336         if (!err) {
1337                 w6692_cnt++;
1338                 pr_notice("W6692 %d cards installed\n", w6692_cnt);
1339                 return 0;
1340         }
1341
1342         free_irq(card->irq, card);
1343 error_init:
1344         mISDN_unregister_device(&card->dch.dev);
1345 error_reg:
1346         release_region(card->addr, 256);
1347 error_setup:
1348         mISDN_freebchannel(&card->bc[1].bch);
1349         mISDN_freebchannel(&card->bc[0].bch);
1350         mISDN_freedchannel(&card->dch);
1351         write_lock_irqsave(&card_lock, flags);
1352         list_del(&card->list);
1353         write_unlock_irqrestore(&card_lock, flags);
1354         kfree(card);
1355         return err;
1356 }
1357
1358 static int
1359 w6692_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1360 {
1361         int             err = -ENOMEM;
1362         struct w6692_hw *card;
1363         struct w6692map *m = (struct w6692map *)ent->driver_data;
1364
1365         card = kzalloc(sizeof(struct w6692_hw), GFP_KERNEL);
1366         if (!card) {
1367                 pr_info("No kmem for w6692 card\n");
1368                 return err;
1369         }
1370         card->pdev = pdev;
1371         card->subtype = m->subtype;
1372         err = pci_enable_device(pdev);
1373         if (err) {
1374                 kfree(card);
1375                 return err;
1376         }
1377
1378         printk(KERN_INFO "mISDN_w6692: found adapter %s at %s\n",
1379                m->name, pci_name(pdev));
1380
1381         card->addr = pci_resource_start(pdev, 1);
1382         card->irq = pdev->irq;
1383         pci_set_drvdata(pdev, card);
1384         err = setup_instance(card);
1385         if (err)
1386                 pci_set_drvdata(pdev, NULL);
1387         return err;
1388 }
1389
1390 static void
1391 w6692_remove_pci(struct pci_dev *pdev)
1392 {
1393         struct w6692_hw *card = pci_get_drvdata(pdev);
1394
1395         if (card)
1396                 release_card(card);
1397         else
1398                 if (debug)
1399                         pr_notice("%s: drvdata already removed\n", __func__);
1400 }
1401
1402 static struct pci_device_id w6692_ids[] = {
1403         { PCI_VENDOR_ID_DYNALINK, PCI_DEVICE_ID_DYNALINK_IS64PH,
1404           PCI_ANY_ID, PCI_ANY_ID, 0, 0, (ulong)&w6692_map[0]},
1405         { PCI_VENDOR_ID_WINBOND2, PCI_DEVICE_ID_WINBOND2_6692,
1406           PCI_VENDOR_ID_USR, PCI_DEVICE_ID_USR_6692, 0, 0,
1407           (ulong)&w6692_map[2]},
1408         { PCI_VENDOR_ID_WINBOND2, PCI_DEVICE_ID_WINBOND2_6692,
1409           PCI_ANY_ID, PCI_ANY_ID, 0, 0, (ulong)&w6692_map[1]},
1410         { }
1411 };
1412 MODULE_DEVICE_TABLE(pci, w6692_ids);
1413
1414 static struct pci_driver w6692_driver = {
1415         .name =  "w6692",
1416         .probe = w6692_probe,
1417         .remove = w6692_remove_pci,
1418         .id_table = w6692_ids,
1419 };
1420
1421 static int __init w6692_init(void)
1422 {
1423         int err;
1424
1425         pr_notice("Winbond W6692 PCI driver Rev. %s\n", W6692_REV);
1426
1427         err = pci_register_driver(&w6692_driver);
1428         return err;
1429 }
1430
1431 static void __exit w6692_cleanup(void)
1432 {
1433         pci_unregister_driver(&w6692_driver);
1434 }
1435
1436 module_init(w6692_init);
1437 module_exit(w6692_cleanup);