drivers/isdn/hardware/mISDN/avmfritz.c

   1 /*
   2  * avm_fritz.c    low level stuff for AVM FRITZ!CARD PCI ISDN cards
   3  *                Thanks to AVM, Berlin for informations
   4  *
   5  * Author       Karsten Keil <keil@isdn4linux.de>
   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 #include <linux/interrupt.h>
  24 #include <linux/module.h>
  25 #include <linux/pci.h>
  26 #include <linux/delay.h>
  27 #include <linux/mISDNhw.h>
  28 #include <linux/slab.h>
  29 #include <asm/unaligned.h>
  30 #include "ipac.h"
  31
  32
  33 #define AVMFRITZ_REV    "2.3"
  34
  35 static int AVM_cnt;
  36 static int debug;
  37
  38 enum {
  39         AVM_FRITZ_PCI,
  40         AVM_FRITZ_PCIV2,
  41 };
  42
  43 #define HDLC_FIFO               0x0
  44 #define HDLC_STATUS             0x4
  45 #define CHIP_WINDOW             0x10
  46
  47 #define CHIP_INDEX              0x4
  48 #define AVM_HDLC_1              0x00
  49 #define AVM_HDLC_2              0x01
  50 #define AVM_ISAC_FIFO           0x02
  51 #define AVM_ISAC_REG_LOW        0x04
  52 #define AVM_ISAC_REG_HIGH       0x06
  53
  54 #define AVM_STATUS0_IRQ_ISAC    0x01
  55 #define AVM_STATUS0_IRQ_HDLC    0x02
  56 #define AVM_STATUS0_IRQ_TIMER   0x04
  57 #define AVM_STATUS0_IRQ_MASK    0x07
  58
  59 #define AVM_STATUS0_RESET       0x01
  60 #define AVM_STATUS0_DIS_TIMER   0x02
  61 #define AVM_STATUS0_RES_TIMER   0x04
  62 #define AVM_STATUS0_ENA_IRQ     0x08
  63 #define AVM_STATUS0_TESTBIT     0x10
  64
  65 #define AVM_STATUS1_INT_SEL     0x0f
  66 #define AVM_STATUS1_ENA_IOM     0x80
  67
  68 #define HDLC_MODE_ITF_FLG       0x01
  69 #define HDLC_MODE_TRANS         0x02
  70 #define HDLC_MODE_CCR_7         0x04
  71 #define HDLC_MODE_CCR_16        0x08
  72 #define HDLC_FIFO_SIZE_128      0x20
  73 #define HDLC_MODE_TESTLOOP      0x80
  74
  75 #define HDLC_INT_XPR            0x80
  76 #define HDLC_INT_XDU            0x40
  77 #define HDLC_INT_RPR            0x20
  78 #define HDLC_INT_MASK           0xE0
  79
  80 #define HDLC_STAT_RME           0x01
  81 #define HDLC_STAT_RDO           0x10
  82 #define HDLC_STAT_CRCVFRRAB     0x0E
  83 #define HDLC_STAT_CRCVFR        0x06
  84 #define HDLC_STAT_RML_MASK_V1   0x3f00
  85 #define HDLC_STAT_RML_MASK_V2   0x7f00
  86
  87 #define HDLC_CMD_XRS            0x80
  88 #define HDLC_CMD_XME            0x01
  89 #define HDLC_CMD_RRS            0x20
  90 #define HDLC_CMD_XML_MASK       0x3f00
  91
  92 #define HDLC_FIFO_SIZE_V1       32
  93 #define HDLC_FIFO_SIZE_V2       128
  94
  95 /* Fritz PCI v2.0 */
  96
  97 #define AVM_HDLC_FIFO_1         0x10
  98 #define AVM_HDLC_FIFO_2         0x18
  99
 100 #define AVM_HDLC_STATUS_1       0x14
 101 #define AVM_HDLC_STATUS_2       0x1c
 102
 103 #define AVM_ISACX_INDEX         0x04
 104 #define AVM_ISACX_DATA          0x08
 105
 106 /* data struct */
 107 #define LOG_SIZE                63
 108
 109 struct hdlc_stat_reg {
 110 #ifdef __BIG_ENDIAN
 111         u8 fill;
 112         u8 mode;
 113         u8 xml;
 114         u8 cmd;
 115 #else
 116         u8 cmd;
 117         u8 xml;
 118         u8 mode;
 119         u8 fill;
 120 #endif
 121 } __attribute__((packed));
 122
 123 struct hdlc_hw {
 124         union {
 125                 u32 ctrl;
 126                 struct hdlc_stat_reg sr;
 127         } ctrl;
 128         u32 stat;
 129 };
 130
 131 struct fritzcard {
 132         struct list_head        list;
 133         struct pci_dev          *pdev;
 134         char                    name[MISDN_MAX_IDLEN];
 135         u8                      type;
 136         u8                      ctrlreg;
 137         u16                     irq;
 138         u32                     irqcnt;
 139         u32                     addr;
 140         spinlock_t              lock; /* hw lock */
 141         struct isac_hw          isac;
 142         struct hdlc_hw          hdlc[2];
 143         struct bchannel         bch[2];
 144         char                    log[LOG_SIZE + 1];
 145 };
 146
 147 static LIST_HEAD(Cards);
 148 static DEFINE_RWLOCK(card_lock); /* protect Cards */
 149
 150 static void
 151 _set_debug(struct fritzcard *card)
 152 {
 153         card->isac.dch.debug = debug;
 154         card->bch[0].debug = debug;
 155         card->bch[1].debug = debug;
 156 }
 157
 158 static int
 159 set_debug(const char *val, struct kernel_param *kp)
 160 {
 161         int ret;
 162         struct fritzcard *card;
 163
 164         ret = param_set_uint(val, kp);
 165         if (!ret) {
 166                 read_lock(&card_lock);
 167                 list_for_each_entry(card, &Cards, list)
 168                         _set_debug(card);
 169                 read_unlock(&card_lock);
 170         }
 171         return ret;
 172 }
 173
 174 MODULE_AUTHOR("Karsten Keil");
 175 MODULE_LICENSE("GPL v2");
 176 MODULE_VERSION(AVMFRITZ_REV);
 177 module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR);
 178 MODULE_PARM_DESC(debug, "avmfritz debug mask");
 179
 180 /* Interface functions */
 181
 182 static u8
 183 ReadISAC_V1(void *p, u8 offset)
 184 {
 185         struct fritzcard *fc = p;
 186         u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW;
 187
 188         outb(idx, fc->addr + CHIP_INDEX);
 189         return inb(fc->addr + CHIP_WINDOW + (offset & 0xf));
 190 }
 191
 192 static void
 193 WriteISAC_V1(void *p, u8 offset, u8 value)
 194 {
 195         struct fritzcard *fc = p;
 196         u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW;
 197
 198         outb(idx, fc->addr + CHIP_INDEX);
 199         outb(value, fc->addr + CHIP_WINDOW + (offset & 0xf));
 200 }
 201
 202 static void
 203 ReadFiFoISAC_V1(void *p, u8 off, u8 *data, int size)
 204 {
 205         struct fritzcard *fc = p;
 206
 207         outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX);
 208         insb(fc->addr + CHIP_WINDOW, data, size);
 209 }
 210
 211 static void
 212 WriteFiFoISAC_V1(void *p, u8 off, u8 *data, int size)
 213 {
 214         struct fritzcard *fc = p;
 215
 216         outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX);
 217         outsb(fc->addr + CHIP_WINDOW, data, size);
 218 }
 219
 220 static u8
 221 ReadISAC_V2(void *p, u8 offset)
 222 {
 223         struct fritzcard *fc = p;
 224
 225         outl(offset, fc->addr + AVM_ISACX_INDEX);
 226         return 0xff & inl(fc->addr + AVM_ISACX_DATA);
 227 }
 228
 229 static void
 230 WriteISAC_V2(void *p, u8 offset, u8 value)
 231 {
 232         struct fritzcard *fc = p;
 233
 234         outl(offset, fc->addr + AVM_ISACX_INDEX);
 235         outl(value, fc->addr + AVM_ISACX_DATA);
 236 }
 237
 238 static void
 239 ReadFiFoISAC_V2(void *p, u8 off, u8 *data, int size)
 240 {
 241         struct fritzcard *fc = p;
 242         int i;
 243
 244         outl(off, fc->addr + AVM_ISACX_INDEX);
 245         for (i = 0; i < size; i++)
 246                 data[i] = 0xff & inl(fc->addr + AVM_ISACX_DATA);
 247 }
 248
 249 static void
 250 WriteFiFoISAC_V2(void *p, u8 off, u8 *data, int size)
 251 {
 252         struct fritzcard *fc = p;
 253         int i;
 254
 255         outl(off, fc->addr + AVM_ISACX_INDEX);
 256         for (i = 0; i < size; i++)
 257                 outl(data[i], fc->addr + AVM_ISACX_DATA);
 258 }
 259
 260 static struct bchannel *
 261 Sel_BCS(struct fritzcard *fc, u32 channel)
 262 {
 263         if (test_bit(FLG_ACTIVE, &fc->bch[0].Flags) &&
 264             (fc->bch[0].nr & channel))
 265                 return &fc->bch[0];
 266         else if (test_bit(FLG_ACTIVE, &fc->bch[1].Flags) &&
 267                  (fc->bch[1].nr & channel))
 268                 return &fc->bch[1];
 269         else
 270                 return NULL;
 271 }
 272
 273 static inline void
 274 __write_ctrl_pci(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) {
 275         u32 idx = channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1;
 276
 277         outl(idx, fc->addr + CHIP_INDEX);
 278         outl(hdlc->ctrl.ctrl, fc->addr + CHIP_WINDOW + HDLC_STATUS);
 279 }
 280
 281 static inline void
 282 __write_ctrl_pciv2(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) {
 283         outl(hdlc->ctrl.ctrl, fc->addr + (channel == 2 ? AVM_HDLC_STATUS_2 :
 284                                           AVM_HDLC_STATUS_1));
 285 }
 286
 287 static void
 288 write_ctrl(struct bchannel *bch, int which) {
 289         struct fritzcard *fc = bch->hw;
 290         struct hdlc_hw *hdlc;
 291
 292         hdlc = &fc->hdlc[(bch->nr - 1) & 1];
 293         pr_debug("%s: hdlc %c wr%x ctrl %x\n", fc->name, '@' + bch->nr,
 294                  which, hdlc->ctrl.ctrl);
 295         switch (fc->type) {
 296         case AVM_FRITZ_PCIV2:
 297                 __write_ctrl_pciv2(fc, hdlc, bch->nr);
 298                 break;
 299         case AVM_FRITZ_PCI:
 300                 __write_ctrl_pci(fc, hdlc, bch->nr);
 301                 break;
 302         }
 303 }
 304
 305
 306 static inline u32
 307 __read_status_pci(u_long addr, u32 channel)
 308 {
 309         outl(channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1, addr + CHIP_INDEX);
 310         return inl(addr + CHIP_WINDOW + HDLC_STATUS);
 311 }
 312
 313 static inline u32
 314 __read_status_pciv2(u_long addr, u32 channel)
 315 {
 316         return inl(addr + (channel == 2 ? AVM_HDLC_STATUS_2 :
 317                            AVM_HDLC_STATUS_1));
 318 }
 319
 320
 321 static u32
 322 read_status(struct fritzcard *fc, u32 channel)
 323 {
 324         switch (fc->type) {
 325         case AVM_FRITZ_PCIV2:
 326                 return __read_status_pciv2(fc->addr, channel);
 327         case AVM_FRITZ_PCI:
 328                 return __read_status_pci(fc->addr, channel);
 329         }
 330         /* dummy */
 331         return 0;
 332 }
 333
 334 static void
 335 enable_hwirq(struct fritzcard *fc)
 336 {
 337         fc->ctrlreg |= AVM_STATUS0_ENA_IRQ;
 338         outb(fc->ctrlreg, fc->addr + 2);
 339 }
 340
 341 static void
 342 disable_hwirq(struct fritzcard *fc)
 343 {
 344         fc->ctrlreg &= ~AVM_STATUS0_ENA_IRQ;
 345         outb(fc->ctrlreg, fc->addr + 2);
 346 }
 347
 348 static int
 349 modehdlc(struct bchannel *bch, int protocol)
 350 {
 351         struct fritzcard *fc = bch->hw;
 352         struct hdlc_hw *hdlc;
 353         u8 mode;
 354
 355         hdlc = &fc->hdlc[(bch->nr - 1) & 1];
 356         pr_debug("%s: hdlc %c protocol %x-->%x ch %d\n", fc->name,
 357                  '@' + bch->nr, bch->state, protocol, bch->nr);
 358         hdlc->ctrl.ctrl = 0;
 359         mode = (fc->type == AVM_FRITZ_PCIV2) ? HDLC_FIFO_SIZE_128 : 0;
 360
 361         switch (protocol) {
 362         case -1: /* used for init */
 363                 bch->state = -1;
 364         case ISDN_P_NONE:
 365                 if (bch->state == ISDN_P_NONE)
 366                         break;
 367                 hdlc->ctrl.sr.cmd  = HDLC_CMD_XRS | HDLC_CMD_RRS;
 368                 hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS;
 369                 write_ctrl(bch, 5);
 370                 bch->state = ISDN_P_NONE;
 371                 test_and_clear_bit(FLG_HDLC, &bch->Flags);
 372                 test_and_clear_bit(FLG_TRANSPARENT, &bch->Flags);
 373                 break;
 374         case ISDN_P_B_RAW:
 375                 bch->state = protocol;
 376                 hdlc->ctrl.sr.cmd  = HDLC_CMD_XRS | HDLC_CMD_RRS;
 377                 hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS;
 378                 write_ctrl(bch, 5);
 379                 hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
 380                 write_ctrl(bch, 1);
 381                 hdlc->ctrl.sr.cmd = 0;
 382                 test_and_set_bit(FLG_TRANSPARENT, &bch->Flags);
 383                 break;
 384         case ISDN_P_B_HDLC:
 385                 bch->state = protocol;
 386                 hdlc->ctrl.sr.cmd  = HDLC_CMD_XRS | HDLC_CMD_RRS;
 387                 hdlc->ctrl.sr.mode = mode | HDLC_MODE_ITF_FLG;
 388                 write_ctrl(bch, 5);
 389                 hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
 390                 write_ctrl(bch, 1);
 391                 hdlc->ctrl.sr.cmd = 0;
 392                 test_and_set_bit(FLG_HDLC, &bch->Flags);
 393                 break;
 394         default:
 395                 pr_info("%s: protocol not known %x\n", fc->name, protocol);
 396                 return -ENOPROTOOPT;
 397         }
 398         return 0;
 399 }
 400
 401 static void
 402 hdlc_empty_fifo(struct bchannel *bch, int count)
 403 {
 404         u32 *ptr;
 405         u8 *p;
 406         u32  val, addr;
 407         int cnt;
 408         struct fritzcard *fc = bch->hw;
 409
 410         pr_debug("%s: %s %d\n", fc->name, __func__, count);
 411         if (test_bit(FLG_RX_OFF, &bch->Flags)) {
 412                 p = NULL;
 413                 bch->dropcnt += count;
 414         } else {
 415                 cnt = bchannel_get_rxbuf(bch, count);
 416                 if (cnt < 0) {
 417                         pr_warning("%s.B%d: No bufferspace for %d bytes\n",
 418                                    fc->name, bch->nr, count);
 419                         return;
 420                 }
 421                 p = skb_put(bch->rx_skb, count);
 422         }
 423         ptr = (u32 *)p;
 424         if (fc->type == AVM_FRITZ_PCIV2)
 425                 addr = fc->addr + (bch->nr == 2 ?
 426                                    AVM_HDLC_FIFO_2 : AVM_HDLC_FIFO_1);
 427         else {
 428                 addr = fc->addr + CHIP_WINDOW;
 429                 outl(bch->nr == 2 ? AVM_HDLC_2 : AVM_HDLC_1, fc->addr);
 430         }
 431         cnt = 0;
 432         while (cnt < count) {
 433                 val = le32_to_cpu(inl(addr));
 434                 if (p) {
 435                         put_unaligned(val, ptr);
 436                         ptr++;
 437                 }
 438                 cnt += 4;
 439         }
 440         if (p && (debug & DEBUG_HW_BFIFO)) {
 441                 snprintf(fc->log, LOG_SIZE, "B%1d-recv %s %d ",
 442                          bch->nr, fc->name, count);
 443                 print_hex_dump_bytes(fc->log, DUMP_PREFIX_OFFSET, p, count);
 444         }
 445 }
 446
 447 static void
 448 hdlc_fill_fifo(struct bchannel *bch)
 449 {
 450         struct fritzcard *fc = bch->hw;
 451         struct hdlc_hw *hdlc;
 452         int count, fs, cnt = 0, idx;
 453         bool fillempty = false;
 454         u8 *p;
 455         u32 *ptr, val, addr;
 456
 457         idx = (bch->nr - 1) & 1;
 458         hdlc = &fc->hdlc[idx];
 459         fs = (fc->type == AVM_FRITZ_PCIV2) ?
 460                 HDLC_FIFO_SIZE_V2 : HDLC_FIFO_SIZE_V1;
 461         if (!bch->tx_skb) {
 462                 if (!test_bit(FLG_TX_EMPTY, &bch->Flags))
 463                         return;
 464                 count = fs;
 465                 p = bch->fill;
 466                 fillempty = true;
 467         } else {
 468                 count = bch->tx_skb->len - bch->tx_idx;
 469                 if (count <= 0)
 470                         return;
 471                 p = bch->tx_skb->data + bch->tx_idx;
 472         }
 473         hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XME;
 474         if (count > fs) {
 475                 count = fs;
 476         } else {
 477                 if (test_bit(FLG_HDLC, &bch->Flags))
 478                         hdlc->ctrl.sr.cmd |= HDLC_CMD_XME;
 479         }
 480         ptr = (u32 *)p;
 481         if (!fillempty) {
 482                 pr_debug("%s.B%d: %d/%d/%d", fc->name, bch->nr, count,
 483                          bch->tx_idx, bch->tx_skb->len);
 484                 bch->tx_idx += count;
 485         } else {
 486                 pr_debug("%s.B%d: fillempty %d\n", fc->name, bch->nr, count);
 487         }
 488         hdlc->ctrl.sr.xml = ((count == fs) ? 0 : count);
 489         if (fc->type == AVM_FRITZ_PCIV2) {
 490                 __write_ctrl_pciv2(fc, hdlc, bch->nr);
 491                 addr = fc->addr + (bch->nr == 2 ?
 492                                    AVM_HDLC_FIFO_2 : AVM_HDLC_FIFO_1);
 493         } else {
 494                 __write_ctrl_pci(fc, hdlc, bch->nr);
 495                 addr = fc->addr + CHIP_WINDOW;
 496         }
 497         if (fillempty) {
 498                 while (cnt < count) {
 499                         /* all bytes the same - no worry about endian */
 500                         outl(*ptr, addr);
 501                         cnt += 4;
 502                 }
 503         } else {
 504                 while (cnt < count) {
 505                         val = get_unaligned(ptr);
 506                         outl(cpu_to_le32(val), addr);
 507                         ptr++;
 508                         cnt += 4;
 509                 }
 510         }
 511         if ((debug & DEBUG_HW_BFIFO) && !fillempty) {
 512                 snprintf(fc->log, LOG_SIZE, "B%1d-send %s %d ",
 513                          bch->nr, fc->name, count);
 514                 print_hex_dump_bytes(fc->log, DUMP_PREFIX_OFFSET, p, count);
 515         }
 516 }
 517
 518 static void
 519 HDLC_irq_xpr(struct bchannel *bch)
 520 {
 521         if (bch->tx_skb && bch->tx_idx < bch->tx_skb->len) {
 522                 hdlc_fill_fifo(bch);
 523         } else {
 524                 if (bch->tx_skb)
 525                         dev_kfree_skb(bch->tx_skb);
 526                 if (get_next_bframe(bch)) {
 527                         hdlc_fill_fifo(bch);
 528                         test_and_clear_bit(FLG_TX_EMPTY, &bch->Flags);
 529                 } else if (test_bit(FLG_TX_EMPTY, &bch->Flags)) {
 530                         hdlc_fill_fifo(bch);
 531                 }
 532         }
 533 }
 534
 535 static void
 536 HDLC_irq(struct bchannel *bch, u32 stat)
 537 {
 538         struct fritzcard *fc = bch->hw;
 539         int             len, fs;
 540         u32             rmlMask;
 541         struct hdlc_hw  *hdlc;
 542
 543         hdlc = &fc->hdlc[(bch->nr - 1) & 1];
 544         pr_debug("%s: ch%d stat %#x\n", fc->name, bch->nr, stat);
 545         if (fc->type == AVM_FRITZ_PCIV2) {
 546                 rmlMask = HDLC_STAT_RML_MASK_V2;
 547                 fs = HDLC_FIFO_SIZE_V2;
 548         } else {
 549                 rmlMask = HDLC_STAT_RML_MASK_V1;
 550                 fs = HDLC_FIFO_SIZE_V1;
 551         }
 552         if (stat & HDLC_INT_RPR) {
 553                 if (stat & HDLC_STAT_RDO) {
 554                         pr_warning("%s: ch%d stat %x RDO\n",
 555                                    fc->name, bch->nr, stat);
 556                         hdlc->ctrl.sr.xml = 0;
 557                         hdlc->ctrl.sr.cmd |= HDLC_CMD_RRS;
 558                         write_ctrl(bch, 1);
 559                         hdlc->ctrl.sr.cmd &= ~HDLC_CMD_RRS;
 560                         write_ctrl(bch, 1);
 561                         if (bch->rx_skb)
 562                                 skb_trim(bch->rx_skb, 0);
 563                 } else {
 564                         len = (stat & rmlMask) >> 8;
 565                         if (!len)
 566                                 len = fs;
 567                         hdlc_empty_fifo(bch, len);
 568                         if (!bch->rx_skb)
 569                                 goto handle_tx;
 570                         if (test_bit(FLG_TRANSPARENT, &bch->Flags)) {
 571                                 recv_Bchannel(bch, 0, false);
 572                         } else if (stat & HDLC_STAT_RME) {
 573                                 if ((stat & HDLC_STAT_CRCVFRRAB) ==
 574                                     HDLC_STAT_CRCVFR) {
 575                                         recv_Bchannel(bch, 0, false);
 576                                 } else {
 577                                         pr_warning("%s: got invalid frame\n",
 578                                                    fc->name);
 579                                         skb_trim(bch->rx_skb, 0);
 580                                 }
 581                         }
 582                 }
 583         }
 584 handle_tx:
 585         if (stat & HDLC_INT_XDU) {
 586                 /* Here we lost an TX interrupt, so
 587                  * restart transmitting the whole frame on HDLC
 588                  * in transparent mode we send the next data
 589                  */
 590                 pr_warning("%s: ch%d stat %x XDU %s\n", fc->name, bch->nr,
 591                            stat, bch->tx_skb ? "tx_skb" : "no tx_skb");
 592                 if (bch->tx_skb && bch->tx_skb->len) {
 593                         if (!test_bit(FLG_TRANSPARENT, &bch->Flags))
 594                                 bch->tx_idx = 0;
 595                 } else if (test_bit(FLG_FILLEMPTY, &bch->Flags)) {
 596                         test_and_set_bit(FLG_TX_EMPTY, &bch->Flags);
 597                 }
 598                 hdlc->ctrl.sr.xml = 0;
 599                 hdlc->ctrl.sr.cmd |= HDLC_CMD_XRS;
 600                 write_ctrl(bch, 1);
 601                 hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XRS;
 602                 HDLC_irq_xpr(bch);
 603                 return;
 604         } else if (stat & HDLC_INT_XPR)
 605                 HDLC_irq_xpr(bch);
 606 }
 607
 608 static inline void
 609 HDLC_irq_main(struct fritzcard *fc)
 610 {
 611         u32 stat;
 612         struct bchannel *bch;
 613
 614         stat = read_status(fc, 1);
 615         if (stat & HDLC_INT_MASK) {
 616                 bch = Sel_BCS(fc, 1);
 617                 if (bch)
 618                         HDLC_irq(bch, stat);
 619                 else
 620                         pr_debug("%s: spurious ch1 IRQ\n", fc->name);
 621         }
 622         stat = read_status(fc, 2);
 623         if (stat & HDLC_INT_MASK) {
 624                 bch = Sel_BCS(fc, 2);
 625                 if (bch)
 626                         HDLC_irq(bch, stat);
 627                 else
 628                         pr_debug("%s: spurious ch2 IRQ\n", fc->name);
 629         }
 630 }
 631
 632 static irqreturn_t
 633 avm_fritz_interrupt(int intno, void *dev_id)
 634 {
 635         struct fritzcard *fc = dev_id;
 636         u8 val;
 637         u8 sval;
 638
 639         spin_lock(&fc->lock);
 640         sval = inb(fc->addr + 2);
 641         pr_debug("%s: irq stat0 %x\n", fc->name, sval);
 642         if ((sval & AVM_STATUS0_IRQ_MASK) == AVM_STATUS0_IRQ_MASK) {
 643                 /* shared  IRQ from other HW */
 644                 spin_unlock(&fc->lock);
 645                 return IRQ_NONE;
 646         }
 647         fc->irqcnt++;
 648
 649         if (!(sval & AVM_STATUS0_IRQ_ISAC)) {
 650                 val = ReadISAC_V1(fc, ISAC_ISTA);
 651                 mISDNisac_irq(&fc->isac, val);
 652         }
 653         if (!(sval & AVM_STATUS0_IRQ_HDLC))
 654                 HDLC_irq_main(fc);
 655         spin_unlock(&fc->lock);
 656         return IRQ_HANDLED;
 657 }
 658
 659 static irqreturn_t
 660 avm_fritzv2_interrupt(int intno, void *dev_id)
 661 {
 662         struct fritzcard *fc = dev_id;
 663         u8 val;
 664         u8 sval;
 665
 666         spin_lock(&fc->lock);
 667         sval = inb(fc->addr + 2);
 668         pr_debug("%s: irq stat0 %x\n", fc->name, sval);
 669         if (!(sval & AVM_STATUS0_IRQ_MASK)) {
 670                 /* shared  IRQ from other HW */
 671                 spin_unlock(&fc->lock);
 672                 return IRQ_NONE;
 673         }
 674         fc->irqcnt++;
 675
 676         if (sval & AVM_STATUS0_IRQ_HDLC)
 677                 HDLC_irq_main(fc);
 678         if (sval & AVM_STATUS0_IRQ_ISAC) {
 679                 val = ReadISAC_V2(fc, ISACX_ISTA);
 680                 mISDNisac_irq(&fc->isac, val);
 681         }
 682         if (sval & AVM_STATUS0_IRQ_TIMER) {
 683                 pr_debug("%s: timer irq\n", fc->name);
 684                 outb(fc->ctrlreg | AVM_STATUS0_RES_TIMER, fc->addr + 2);
 685                 udelay(1);
 686                 outb(fc->ctrlreg, fc->addr + 2);
 687         }
 688         spin_unlock(&fc->lock);
 689         return IRQ_HANDLED;
 690 }
 691
 692 static int
 693 avm_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
 694 {
 695         struct bchannel *bch = container_of(ch, struct bchannel, ch);
 696         struct fritzcard *fc = bch->hw;
 697         int ret = -EINVAL;
 698         struct mISDNhead *hh = mISDN_HEAD_P(skb);
 699         unsigned long flags;
 700
 701         switch (hh->prim) {
 702         case PH_DATA_REQ:
 703                 spin_lock_irqsave(&fc->lock, flags);
 704                 ret = bchannel_senddata(bch, skb);
 705                 if (ret > 0) { /* direct TX */
 706                         hdlc_fill_fifo(bch);
 707                         ret = 0;
 708                 }
 709                 spin_unlock_irqrestore(&fc->lock, flags);
 710                 return ret;
 711         case PH_ACTIVATE_REQ:
 712                 spin_lock_irqsave(&fc->lock, flags);
 713                 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags))
 714                         ret = modehdlc(bch, ch->protocol);
 715                 else
 716                         ret = 0;
 717                 spin_unlock_irqrestore(&fc->lock, flags);
 718                 if (!ret)
 719                         _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
 720                                     NULL, GFP_KERNEL);
 721                 break;
 722         case PH_DEACTIVATE_REQ:
 723                 spin_lock_irqsave(&fc->lock, flags);
 724                 mISDN_clear_bchannel(bch);
 725                 modehdlc(bch, ISDN_P_NONE);
 726                 spin_unlock_irqrestore(&fc->lock, flags);
 727                 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
 728                             NULL, GFP_KERNEL);
 729                 ret = 0;
 730                 break;
 731         }
 732         if (!ret)
 733                 dev_kfree_skb(skb);
 734         return ret;
 735 }
 736
 737 static void
 738 inithdlc(struct fritzcard *fc)
 739 {
 740         modehdlc(&fc->bch[0], -1);
 741         modehdlc(&fc->bch[1], -1);
 742 }
 743
 744 static void
 745 clear_pending_hdlc_ints(struct fritzcard *fc)
 746 {
 747         u32 val;
 748
 749         val = read_status(fc, 1);
 750         pr_debug("%s: HDLC 1 STA %x\n", fc->name, val);
 751         val = read_status(fc, 2);
 752         pr_debug("%s: HDLC 2 STA %x\n", fc->name, val);
 753 }
 754
 755 static void
 756 reset_avm(struct fritzcard *fc)
 757 {
 758         switch (fc->type) {
 759         case AVM_FRITZ_PCI:
 760                 fc->ctrlreg = AVM_STATUS0_RESET | AVM_STATUS0_DIS_TIMER;
 761                 break;
 762         case AVM_FRITZ_PCIV2:
 763                 fc->ctrlreg = AVM_STATUS0_RESET;
 764                 break;
 765         }
 766         if (debug & DEBUG_HW)
 767                 pr_notice("%s: reset\n", fc->name);
 768         disable_hwirq(fc);
 769         mdelay(5);
 770         switch (fc->type) {
 771         case AVM_FRITZ_PCI:
 772                 fc->ctrlreg = AVM_STATUS0_DIS_TIMER | AVM_STATUS0_RES_TIMER;
 773                 disable_hwirq(fc);
 774                 outb(AVM_STATUS1_ENA_IOM, fc->addr + 3);
 775                 break;
 776         case AVM_FRITZ_PCIV2:
 777                 fc->ctrlreg = 0;
 778                 disable_hwirq(fc);
 779                 break;
 780         }
 781         mdelay(1);
 782         if (debug & DEBUG_HW)
 783                 pr_notice("%s: S0/S1 %x/%x\n", fc->name,
 784                           inb(fc->addr + 2), inb(fc->addr + 3));
 785 }
 786
 787 static int
 788 init_card(struct fritzcard *fc)
 789 {
 790         int             ret, cnt = 3;
 791         u_long          flags;
 792
 793         reset_avm(fc); /* disable IRQ */
 794         if (fc->type == AVM_FRITZ_PCIV2)
 795                 ret = request_irq(fc->irq, avm_fritzv2_interrupt,
 796                                   IRQF_SHARED, fc->name, fc);
 797         else
 798                 ret = request_irq(fc->irq, avm_fritz_interrupt,
 799                                   IRQF_SHARED, fc->name, fc);
 800         if (ret) {
 801                 pr_info("%s: couldn't get interrupt %d\n",
 802                         fc->name, fc->irq);
 803                 return ret;
 804         }
 805         while (cnt--) {
 806                 spin_lock_irqsave(&fc->lock, flags);
 807                 ret = fc->isac.init(&fc->isac);
 808                 if (ret) {
 809                         spin_unlock_irqrestore(&fc->lock, flags);
 810                         pr_info("%s: ISAC init failed with %d\n",
 811                                 fc->name, ret);
 812                         break;
 813                 }
 814                 clear_pending_hdlc_ints(fc);
 815                 inithdlc(fc);
 816                 enable_hwirq(fc);
 817                 /* RESET Receiver and Transmitter */
 818                 if (fc->type == AVM_FRITZ_PCIV2) {
 819                         WriteISAC_V2(fc, ISACX_MASK, 0);
 820                         WriteISAC_V2(fc, ISACX_CMDRD, 0x41);
 821                 } else {
 822                         WriteISAC_V1(fc, ISAC_MASK, 0);
 823                         WriteISAC_V1(fc, ISAC_CMDR, 0x41);
 824                 }
 825                 spin_unlock_irqrestore(&fc->lock, flags);
 826                 /* Timeout 10ms */
 827                 msleep_interruptible(10);
 828                 if (debug & DEBUG_HW)
 829                         pr_notice("%s: IRQ %d count %d\n", fc->name,
 830                                   fc->irq, fc->irqcnt);
 831                 if (!fc->irqcnt) {
 832                         pr_info("%s: IRQ(%d) getting no IRQs during init %d\n",
 833                                 fc->name, fc->irq, 3 - cnt);
 834                         reset_avm(fc);
 835                 } else
 836                         return 0;
 837         }
 838         free_irq(fc->irq, fc);
 839         return -EIO;
 840 }
 841
 842 static int
 843 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
 844 {
 845         return mISDN_ctrl_bchannel(bch, cq);
 846 }
 847
 848 static int
 849 avm_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
 850 {
 851         struct bchannel *bch = container_of(ch, struct bchannel, ch);
 852         struct fritzcard *fc = bch->hw;
 853         int ret = -EINVAL;
 854         u_long flags;
 855
 856         pr_debug("%s: %s cmd:%x %p\n", fc->name, __func__, cmd, arg);
 857         switch (cmd) {
 858         case CLOSE_CHANNEL:
 859                 test_and_clear_bit(FLG_OPEN, &bch->Flags);
 860                 cancel_work_sync(&bch->workq);
 861                 spin_lock_irqsave(&fc->lock, flags);
 862                 mISDN_clear_bchannel(bch);
 863                 modehdlc(bch, ISDN_P_NONE);
 864                 spin_unlock_irqrestore(&fc->lock, flags);
 865                 ch->protocol = ISDN_P_NONE;
 866                 ch->peer = NULL;
 867                 module_put(THIS_MODULE);
 868                 ret = 0;
 869                 break;
 870         case CONTROL_CHANNEL:
 871                 ret = channel_bctrl(bch, arg);
 872                 break;
 873         default:
 874                 pr_info("%s: %s unknown prim(%x)\n", fc->name, __func__, cmd);
 875         }
 876         return ret;
 877 }
 878
 879 static int
 880 channel_ctrl(struct fritzcard  *fc, struct mISDN_ctrl_req *cq)
 881 {
 882         int     ret = 0;
 883
 884         switch (cq->op) {
 885         case MISDN_CTRL_GETOP:
 886                 cq->op = MISDN_CTRL_LOOP | MISDN_CTRL_L1_TIMER3;
 887                 break;
 888         case MISDN_CTRL_LOOP:
 889                 /* cq->channel: 0 disable, 1 B1 loop 2 B2 loop, 3 both */
 890                 if (cq->channel < 0 || cq->channel > 3) {
 891                         ret = -EINVAL;
 892                         break;
 893                 }
 894                 ret = fc->isac.ctrl(&fc->isac, HW_TESTLOOP, cq->channel);
 895                 break;
 896         case MISDN_CTRL_L1_TIMER3:
 897                 ret = fc->isac.ctrl(&fc->isac, HW_TIMER3_VALUE, cq->p1);
 898                 break;
 899         default:
 900                 pr_info("%s: %s unknown Op %x\n", fc->name, __func__, cq->op);
 901                 ret = -EINVAL;
 902                 break;
 903         }
 904         return ret;
 905 }
 906
 907 static int
 908 open_bchannel(struct fritzcard *fc, struct channel_req *rq)
 909 {
 910         struct bchannel         *bch;
 911
 912         if (rq->adr.channel == 0 || rq->adr.channel > 2)
 913                 return -EINVAL;
 914         if (rq->protocol == ISDN_P_NONE)
 915                 return -EINVAL;
 916         bch = &fc->bch[rq->adr.channel - 1];
 917         if (test_and_set_bit(FLG_OPEN, &bch->Flags))
 918                 return -EBUSY; /* b-channel can be only open once */
 919         bch->ch.protocol = rq->protocol;
 920         rq->ch = &bch->ch;
 921         return 0;
 922 }
 923
 924 /*
 925  * device control function
 926  */
 927 static int
 928 avm_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
 929 {
 930         struct mISDNdevice      *dev = container_of(ch, struct mISDNdevice, D);
 931         struct dchannel         *dch = container_of(dev, struct dchannel, dev);
 932         struct fritzcard        *fc = dch->hw;
 933         struct channel_req      *rq;
 934         int                     err = 0;
 935
 936         pr_debug("%s: %s cmd:%x %p\n", fc->name, __func__, cmd, arg);
 937         switch (cmd) {
 938         case OPEN_CHANNEL:
 939                 rq = arg;
 940                 if (rq->protocol == ISDN_P_TE_S0)
 941                         err = fc->isac.open(&fc->isac, rq);
 942                 else
 943                         err = open_bchannel(fc, rq);
 944                 if (err)
 945                         break;
 946                 if (!try_module_get(THIS_MODULE))
 947                         pr_info("%s: cannot get module\n", fc->name);
 948                 break;
 949         case CLOSE_CHANNEL:
 950                 pr_debug("%s: dev(%d) close from %p\n", fc->name, dch->dev.id,
 951                          __builtin_return_address(0));
 952                 module_put(THIS_MODULE);
 953                 break;
 954         case CONTROL_CHANNEL:
 955                 err = channel_ctrl(fc, arg);
 956                 break;
 957         default:
 958                 pr_debug("%s: %s unknown command %x\n",
 959                          fc->name, __func__, cmd);
 960                 return -EINVAL;
 961         }
 962         return err;
 963 }
 964
 965 static int
 966 setup_fritz(struct fritzcard *fc)
 967 {
 968         u32 val, ver;
 969
 970         if (!request_region(fc->addr, 32, fc->name)) {
 971                 pr_info("%s: AVM config port %x-%x already in use\n",
 972                         fc->name, fc->addr, fc->addr + 31);
 973                 return -EIO;
 974         }
 975         switch (fc->type) {
 976         case AVM_FRITZ_PCI:
 977                 val = inl(fc->addr);
 978                 outl(AVM_HDLC_1, fc->addr + CHIP_INDEX);
 979                 ver = inl(fc->addr + CHIP_WINDOW + HDLC_STATUS) >> 24;
 980                 if (debug & DEBUG_HW) {
 981                         pr_notice("%s: PCI stat %#x\n", fc->name, val);
 982                         pr_notice("%s: PCI Class %X Rev %d\n", fc->name,
 983                                   val & 0xff, (val >> 8) & 0xff);
 984                         pr_notice("%s: HDLC version %x\n", fc->name, ver & 0xf);
 985                 }
 986                 ASSIGN_FUNC(V1, ISAC, fc->isac);
 987                 fc->isac.type = IPAC_TYPE_ISAC;
 988                 break;
 989         case AVM_FRITZ_PCIV2:
 990                 val = inl(fc->addr);
 991                 ver = inl(fc->addr + AVM_HDLC_STATUS_1) >> 24;
 992                 if (debug & DEBUG_HW) {
 993                         pr_notice("%s: PCI V2 stat %#x\n", fc->name, val);
 994                         pr_notice("%s: PCI V2 Class %X Rev %d\n", fc->name,
 995                                   val & 0xff, (val >> 8) & 0xff);
 996                         pr_notice("%s: HDLC version %x\n", fc->name, ver & 0xf);
 997                 }
 998                 ASSIGN_FUNC(V2, ISAC, fc->isac);
 999                 fc->isac.type = IPAC_TYPE_ISACX;
1000                 break;
1001         default:
1002                 release_region(fc->addr, 32);
1003                 pr_info("%s: AVM unknown type %d\n", fc->name, fc->type);
1004                 return -ENODEV;
1005         }
1006         pr_notice("%s: %s config irq:%d base:0x%X\n", fc->name,
1007                   (fc->type == AVM_FRITZ_PCI) ? "AVM Fritz!CARD PCI" :
1008                   "AVM Fritz!CARD PCIv2", fc->irq, fc->addr);
1009         return 0;
1010 }
1011
1012 static void
1013 release_card(struct fritzcard *card)
1014 {
1015         u_long flags;
1016
1017         disable_hwirq(card);
1018         spin_lock_irqsave(&card->lock, flags);
1019         modehdlc(&card->bch[0], ISDN_P_NONE);
1020         modehdlc(&card->bch[1], ISDN_P_NONE);
1021         spin_unlock_irqrestore(&card->lock, flags);
1022         card->isac.release(&card->isac);
1023         free_irq(card->irq, card);
1024         mISDN_freebchannel(&card->bch[1]);
1025         mISDN_freebchannel(&card->bch[0]);
1026         mISDN_unregister_device(&card->isac.dch.dev);
1027         release_region(card->addr, 32);
1028         pci_disable_device(card->pdev);
1029         pci_set_drvdata(card->pdev, NULL);
1030         write_lock_irqsave(&card_lock, flags);
1031         list_del(&card->list);
1032         write_unlock_irqrestore(&card_lock, flags);
1033         kfree(card);
1034         AVM_cnt--;
1035 }
1036
1037 static int
1038 setup_instance(struct fritzcard *card)
1039 {
1040         int i, err;
1041         unsigned short minsize;
1042         u_long flags;
1043
1044         snprintf(card->name, MISDN_MAX_IDLEN - 1, "AVM.%d", AVM_cnt + 1);
1045         write_lock_irqsave(&card_lock, flags);
1046         list_add_tail(&card->list, &Cards);
1047         write_unlock_irqrestore(&card_lock, flags);
1048
1049         _set_debug(card);
1050         card->isac.name = card->name;
1051         spin_lock_init(&card->lock);
1052         card->isac.hwlock = &card->lock;
1053         mISDNisac_init(&card->isac, card);
1054
1055         card->isac.dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
1056                 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
1057         card->isac.dch.dev.D.ctrl = avm_dctrl;
1058         for (i = 0; i < 2; i++) {
1059                 card->bch[i].nr = i + 1;
1060                 set_channelmap(i + 1, card->isac.dch.dev.channelmap);
1061                 if (AVM_FRITZ_PCIV2 == card->type)
1062                         minsize = HDLC_FIFO_SIZE_V2;
1063                 else
1064                         minsize = HDLC_FIFO_SIZE_V1;
1065                 mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM, minsize);
1066                 card->bch[i].hw = card;
1067                 card->bch[i].ch.send = avm_l2l1B;
1068                 card->bch[i].ch.ctrl = avm_bctrl;
1069                 card->bch[i].ch.nr = i + 1;
1070                 list_add(&card->bch[i].ch.list, &card->isac.dch.dev.bchannels);
1071         }
1072         err = setup_fritz(card);
1073         if (err)
1074                 goto error;
1075         err = mISDN_register_device(&card->isac.dch.dev, &card->pdev->dev,
1076                                     card->name);
1077         if (err)
1078                 goto error_reg;
1079         err = init_card(card);
1080         if (!err)  {
1081                 AVM_cnt++;
1082                 pr_notice("AVM %d cards installed DEBUG\n", AVM_cnt);
1083                 return 0;
1084         }
1085         mISDN_unregister_device(&card->isac.dch.dev);
1086 error_reg:
1087         release_region(card->addr, 32);
1088 error:
1089         card->isac.release(&card->isac);
1090         mISDN_freebchannel(&card->bch[1]);
1091         mISDN_freebchannel(&card->bch[0]);
1092         write_lock_irqsave(&card_lock, flags);
1093         list_del(&card->list);
1094         write_unlock_irqrestore(&card_lock, flags);
1095         kfree(card);
1096         return err;
1097 }
1098
1099 static int
1100 fritzpci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1101 {
1102         int err = -ENOMEM;
1103         struct fritzcard *card;
1104
1105         card = kzalloc(sizeof(struct fritzcard), GFP_KERNEL);
1106         if (!card) {
1107                 pr_info("No kmem for fritzcard\n");
1108                 return err;
1109         }
1110         if (pdev->device == PCI_DEVICE_ID_AVM_A1_V2)
1111                 card->type = AVM_FRITZ_PCIV2;
1112         else
1113                 card->type = AVM_FRITZ_PCI;
1114         card->pdev = pdev;
1115         err = pci_enable_device(pdev);
1116         if (err) {
1117                 kfree(card);
1118                 return err;
1119         }
1120
1121         pr_notice("mISDN: found adapter %s at %s\n",
1122                   (char *) ent->driver_data, pci_name(pdev));
1123
1124         card->addr = pci_resource_start(pdev, 1);
1125         card->irq = pdev->irq;
1126         pci_set_drvdata(pdev, card);
1127         err = setup_instance(card);
1128         if (err)
1129                 pci_set_drvdata(pdev, NULL);
1130         return err;
1131 }
1132
1133 static void
1134 fritz_remove_pci(struct pci_dev *pdev)
1135 {
1136         struct fritzcard *card = pci_get_drvdata(pdev);
1137
1138         if (card)
1139                 release_card(card);
1140         else
1141                 if (debug)
1142                         pr_info("%s: drvdata already removed\n", __func__);
1143 }
1144
1145 static const struct pci_device_id fcpci_ids[] = {
1146         { PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_A1, PCI_ANY_ID, PCI_ANY_ID,
1147           0, 0, (unsigned long) "Fritz!Card PCI"},
1148         { PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_A1_V2, PCI_ANY_ID, PCI_ANY_ID,
1149           0, 0, (unsigned long) "Fritz!Card PCI v2" },
1150         { }
1151 };
1152 MODULE_DEVICE_TABLE(pci, fcpci_ids);
1153
1154 static struct pci_driver fcpci_driver = {
1155         .name = "fcpci",
1156         .probe = fritzpci_probe,
1157         .remove = fritz_remove_pci,
1158         .id_table = fcpci_ids,
1159 };
1160
1161 static int __init AVM_init(void)
1162 {
1163         int err;
1164
1165         pr_notice("AVM Fritz PCI driver Rev. %s\n", AVMFRITZ_REV);
1166         err = pci_register_driver(&fcpci_driver);
1167         return err;
1168 }
1169
1170 static void __exit AVM_cleanup(void)
1171 {
1172         pci_unregister_driver(&fcpci_driver);
1173 }
1174
1175 module_init(AVM_init);
1176 module_exit(AVM_cleanup);