drivers/media/dvb/bt8xx/bt878.c

   1 /*
   2  * bt878.c: part of the driver for the Pinnacle PCTV Sat DVB PCI card
   3  *
   4  * Copyright (C) 2002 Peter Hettkamp <peter.hettkamp@htp-tel.de>
   5  *
   6  * large parts based on the bttv driver
   7  * Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@metzlerbros.de)
   8  *                        & Marcus Metzler (mocm@metzlerbros.de)
   9  * (c) 1999,2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  27  *
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/moduleparam.h>
  32 #include <linux/kernel.h>
  33 #include <linux/pci.h>
  34 #include <asm/io.h>
  35 #include <linux/ioport.h>
  36 #include <asm/pgtable.h>
  37 #include <asm/page.h>
  38 #include <linux/types.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/kmod.h>
  41 #include <linux/vmalloc.h>
  42 #include <linux/init.h>
  43
  44 #include "dmxdev.h"
  45 #include "dvbdev.h"
  46 #include "bt878.h"
  47 #include "dst_priv.h"
  48
  49
  50 /**************************************/
  51 /* Miscellaneous utility  definitions */
  52 /**************************************/
  53
  54 static unsigned int bt878_verbose = 1;
  55 static unsigned int bt878_debug;
  56
  57 module_param_named(verbose, bt878_verbose, int, 0444);
  58 MODULE_PARM_DESC(verbose,
  59                  "verbose startup messages, default is 1 (yes)");
  60 module_param_named(debug, bt878_debug, int, 0644);
  61 MODULE_PARM_DESC(debug, "Turn on/off debugging, default is 0 (off).");
  62
  63 int bt878_num;
  64 struct bt878 bt878[BT878_MAX];
  65
  66 EXPORT_SYMBOL(bt878_debug);
  67 EXPORT_SYMBOL(bt878_verbose);
  68 EXPORT_SYMBOL(bt878_num);
  69 EXPORT_SYMBOL(bt878);
  70
  71 #define btwrite(dat,adr)    bmtwrite((dat), (bt->bt878_mem+(adr)))
  72 #define btread(adr)         bmtread(bt->bt878_mem+(adr))
  73
  74 #define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
  75 #define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
  76 #define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)
  77
  78 #if defined(dprintk)
  79 #undef dprintk
  80 #endif
  81 #define dprintk if(bt878_debug) printk
  82
  83 static void bt878_mem_free(struct bt878 *bt)
  84 {
  85         if (bt->buf_cpu) {
  86                 pci_free_consistent(bt->dev, bt->buf_size, bt->buf_cpu,
  87                                     bt->buf_dma);
  88                 bt->buf_cpu = NULL;
  89         }
  90
  91         if (bt->risc_cpu) {
  92                 pci_free_consistent(bt->dev, bt->risc_size, bt->risc_cpu,
  93                                     bt->risc_dma);
  94                 bt->risc_cpu = NULL;
  95         }
  96 }
  97
  98 static int bt878_mem_alloc(struct bt878 *bt)
  99 {
 100         if (!bt->buf_cpu) {
 101                 bt->buf_size = 128 * 1024;
 102
 103                 bt->buf_cpu =
 104                     pci_alloc_consistent(bt->dev, bt->buf_size,
 105                                          &bt->buf_dma);
 106
 107                 if (!bt->buf_cpu)
 108                         return -ENOMEM;
 109
 110                 memset(bt->buf_cpu, 0, bt->buf_size);
 111         }
 112
 113         if (!bt->risc_cpu) {
 114                 bt->risc_size = PAGE_SIZE;
 115                 bt->risc_cpu =
 116                     pci_alloc_consistent(bt->dev, bt->risc_size,
 117                                          &bt->risc_dma);
 118
 119                 if (!bt->risc_cpu) {
 120                         bt878_mem_free(bt);
 121                         return -ENOMEM;
 122                 }
 123
 124                 memset(bt->risc_cpu, 0, bt->risc_size);
 125         }
 126
 127         return 0;
 128 }
 129
 130 /* RISC instructions */
 131 #define RISC_WRITE              (0x01 << 28)
 132 #define RISC_JUMP               (0x07 << 28)
 133 #define RISC_SYNC               (0x08 << 28)
 134
 135 /* RISC bits */
 136 #define RISC_WR_SOL             (1 << 27)
 137 #define RISC_WR_EOL             (1 << 26)
 138 #define RISC_IRQ                (1 << 24)
 139 #define RISC_STATUS(status)     ((((~status) & 0x0F) << 20) | ((status & 0x0F) << 16))
 140 #define RISC_SYNC_RESYNC        (1 << 15)
 141 #define RISC_SYNC_FM1           0x06
 142 #define RISC_SYNC_VRO           0x0C
 143
 144 #define RISC_FLUSH()            bt->risc_pos = 0
 145 #define RISC_INSTR(instr)       bt->risc_cpu[bt->risc_pos++] = cpu_to_le32(instr)
 146
 147 static int bt878_make_risc(struct bt878 *bt)
 148 {
 149         bt->block_bytes = bt->buf_size >> 4;
 150         bt->block_count = 1 << 4;
 151         bt->line_bytes = bt->block_bytes;
 152         bt->line_count = bt->block_count;
 153
 154         while (bt->line_bytes > 4095) {
 155                 bt->line_bytes >>= 1;
 156                 bt->line_count <<= 1;
 157         }
 158
 159         if (bt->line_count > 255) {
 160                 printk("bt878: buffer size error!\n");
 161                 return -EINVAL;
 162         }
 163         return 0;
 164 }
 165
 166
 167 static void bt878_risc_program(struct bt878 *bt, u32 op_sync_orin)
 168 {
 169         u32 buf_pos = 0;
 170         u32 line;
 171
 172         RISC_FLUSH();
 173         RISC_INSTR(RISC_SYNC | RISC_SYNC_FM1 | op_sync_orin);
 174         RISC_INSTR(0);
 175
 176         dprintk("bt878: risc len lines %u, bytes per line %u\n",
 177                         bt->line_count, bt->line_bytes);
 178         for (line = 0; line < bt->line_count; line++) {
 179                 // At the beginning of every block we issue an IRQ with previous (finished) block number set
 180                 if (!(buf_pos % bt->block_bytes))
 181                         RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 182                                    RISC_IRQ |
 183                                    RISC_STATUS(((buf_pos /
 184                                                  bt->block_bytes) +
 185                                                 (bt->block_count -
 186                                                  1)) %
 187                                                bt->block_count) | bt->
 188                                    line_bytes);
 189                 else
 190                         RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 191                                    bt->line_bytes);
 192                 RISC_INSTR(bt->buf_dma + buf_pos);
 193                 buf_pos += bt->line_bytes;
 194         }
 195
 196         RISC_INSTR(RISC_SYNC | op_sync_orin | RISC_SYNC_VRO);
 197         RISC_INSTR(0);
 198
 199         RISC_INSTR(RISC_JUMP);
 200         RISC_INSTR(bt->risc_dma);
 201
 202         btwrite((bt->line_count << 16) | bt->line_bytes, BT878_APACK_LEN);
 203 }
 204
 205 /*****************************/
 206 /* Start/Stop grabbing funcs */
 207 /*****************************/
 208
 209 void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
 210                 u32 irq_err_ignore)
 211 {
 212         u32 int_mask;
 213
 214         dprintk("bt878 debug: bt878_start (ctl=%8.8x)\n", controlreg);
 215         /* complete the writing of the risc dma program now we have
 216          * the card specifics
 217          */
 218         bt878_risc_program(bt, op_sync_orin);
 219         controlreg &= ~0x1f;
 220         controlreg |= 0x1b;
 221
 222         btwrite(bt->risc_dma, BT878_ARISC_START);
 223
 224         /* original int mask had :
 225          *    6    2    8    4    0
 226          * 1111 1111 1000 0000 0000
 227          * SCERR|OCERR|PABORT|RIPERR|FDSR|FTRGT|FBUS|RISCI
 228          * Hacked for DST to:
 229          * SCERR | OCERR | FDSR | FTRGT | FBUS | RISCI
 230          */
 231         int_mask = BT878_ASCERR | BT878_AOCERR | BT878_APABORT |
 232                 BT878_ARIPERR | BT878_APPERR | BT878_AFDSR | BT878_AFTRGT |
 233                 BT878_AFBUS | BT878_ARISCI;
 234
 235
 236         /* ignore pesky bits */
 237         int_mask &= ~irq_err_ignore;
 238
 239         btwrite(int_mask, BT878_AINT_MASK);
 240         btwrite(controlreg, BT878_AGPIO_DMA_CTL);
 241 }
 242
 243 void bt878_stop(struct bt878 *bt)
 244 {
 245         u32 stat;
 246         int i = 0;
 247
 248         dprintk("bt878 debug: bt878_stop\n");
 249
 250         btwrite(0, BT878_AINT_MASK);
 251         btand(~0x13, BT878_AGPIO_DMA_CTL);
 252
 253         do {
 254                 stat = btread(BT878_AINT_STAT);
 255                 if (!(stat & BT878_ARISC_EN))
 256                         break;
 257                 i++;
 258         } while (i < 500);
 259
 260         dprintk("bt878(%d) debug: bt878_stop, i=%d, stat=0x%8.8x\n",
 261                 bt->nr, i, stat);
 262 }
 263
 264 EXPORT_SYMBOL(bt878_start);
 265 EXPORT_SYMBOL(bt878_stop);
 266
 267 /*****************************/
 268 /* Interrupt service routine */
 269 /*****************************/
 270
 271 static irqreturn_t bt878_irq(int irq, void *dev_id, struct pt_regs *regs)
 272 {
 273         u32 stat, astat, mask;
 274         int count;
 275         struct bt878 *bt;
 276
 277         bt = (struct bt878 *) dev_id;
 278
 279         count = 0;
 280         while (1) {
 281                 stat = btread(BT878_AINT_STAT);
 282                 mask = btread(BT878_AINT_MASK);
 283                 if (!(astat = (stat & mask)))
 284                         return IRQ_NONE;        /* this interrupt is not for me */
 285 /*              dprintk("bt878(%d) debug: irq count %d, stat 0x%8.8x, mask 0x%8.8x\n",bt->nr,count,stat,mask); */
 286                 btwrite(astat, BT878_AINT_STAT);        /* try to clear interupt condition */
 287
 288
 289                 if (astat & (BT878_ASCERR | BT878_AOCERR)) {
 290                         if (bt878_verbose) {
 291                                 printk("bt878(%d): irq%s%s risc_pc=%08x\n",
 292                                        bt->nr,
 293                                        (astat & BT878_ASCERR) ? " SCERR" :
 294                                        "",
 295                                        (astat & BT878_AOCERR) ? " OCERR" :
 296                                        "", btread(BT878_ARISC_PC));
 297                         }
 298                 }
 299                 if (astat & (BT878_APABORT | BT878_ARIPERR | BT878_APPERR)) {
 300                         if (bt878_verbose) {
 301                                 printk
 302                                     ("bt878(%d): irq%s%s%s risc_pc=%08x\n",
 303                                      bt->nr,
 304                                      (astat & BT878_APABORT) ? " PABORT" :
 305                                      "",
 306                                      (astat & BT878_ARIPERR) ? " RIPERR" :
 307                                      "",
 308                                      (astat & BT878_APPERR) ? " PPERR" :
 309                                      "", btread(BT878_ARISC_PC));
 310                         }
 311                 }
 312                 if (astat & (BT878_AFDSR | BT878_AFTRGT | BT878_AFBUS)) {
 313                         if (bt878_verbose) {
 314                                 printk
 315                                     ("bt878(%d): irq%s%s%s risc_pc=%08x\n",
 316                                      bt->nr,
 317                                      (astat & BT878_AFDSR) ? " FDSR" : "",
 318                                      (astat & BT878_AFTRGT) ? " FTRGT" :
 319                                      "",
 320                                      (astat & BT878_AFBUS) ? " FBUS" : "",
 321                                      btread(BT878_ARISC_PC));
 322                         }
 323                 }
 324                 if (astat & BT878_ARISCI) {
 325                         bt->finished_block = (stat & BT878_ARISCS) >> 28;
 326                         tasklet_schedule(&bt->tasklet);
 327                         break;
 328                 }
 329                 count++;
 330                 if (count > 20) {
 331                         btwrite(0, BT878_AINT_MASK);
 332                         printk(KERN_ERR
 333                                "bt878(%d): IRQ lockup, cleared int mask\n",
 334                                bt->nr);
 335                         break;
 336                 }
 337         }
 338         return IRQ_HANDLED;
 339 }
 340
 341 int
 342 bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *mp)
 343 {
 344         int retval;
 345
 346         retval = 0;
 347         if (mutex_lock_interruptible(&bt->gpio_lock))
 348                 return -ERESTARTSYS;
 349         /* special gpio signal */
 350         switch (cmd) {
 351             case DST_IG_ENABLE:
 352                 // dprintk("dvb_bt8xx: dst enable mask 0x%02x enb 0x%02x \n", mp->dstg.enb.mask, mp->dstg.enb.enable);
 353                 retval = bttv_gpio_enable(bt->bttv_nr,
 354                                 mp->enb.mask,
 355                                 mp->enb.enable);
 356                 break;
 357             case DST_IG_WRITE:
 358                 // dprintk("dvb_bt8xx: dst write gpio mask 0x%02x out 0x%02x\n", mp->dstg.outp.mask, mp->dstg.outp.highvals);
 359                 retval = bttv_write_gpio(bt->bttv_nr,
 360                                 mp->outp.mask,
 361                                 mp->outp.highvals);
 362
 363                 break;
 364             case DST_IG_READ:
 365                 /* read */
 366                 retval =  bttv_read_gpio(bt->bttv_nr, &mp->rd.value);
 367                 // dprintk("dvb_bt8xx: dst read gpio 0x%02x\n", (unsigned)mp->dstg.rd.value);
 368                 break;
 369             case DST_IG_TS:
 370                 /* Set packet size */
 371                 bt->TS_Size = mp->psize;
 372                 break;
 373
 374             default:
 375                 retval = -EINVAL;
 376                 break;
 377         }
 378         mutex_unlock(&bt->gpio_lock);
 379         return retval;
 380 }
 381
 382 EXPORT_SYMBOL(bt878_device_control);
 383
 384
 385 static struct cards card_list[] __devinitdata = {
 386
 387         { 0x01010071, BTTV_BOARD_NEBULA_DIGITV,                 "Nebula Electronics DigiTV" },
 388         { 0x07611461, BTTV_BOARD_AVDVBT_761,                    "AverMedia AverTV DVB-T 761" },
 389         { 0x001c11bd, BTTV_BOARD_PINNACLESAT,                   "Pinnacle PCTV Sat" },
 390         { 0x002611bd, BTTV_BOARD_TWINHAN_DST,                   "Pinnacle PCTV SAT CI" },
 391         { 0x00011822, BTTV_BOARD_TWINHAN_DST,                   "Twinhan VisionPlus DVB" },
 392         { 0xfc00270f, BTTV_BOARD_TWINHAN_DST,                   "ChainTech digitop DST-1000 DVB-S" },
 393         { 0x07711461, BTTV_BOARD_AVDVBT_771,                    "AVermedia AverTV DVB-T 771" },
 394         { 0xdb1018ac, BTTV_BOARD_DVICO_DVBT_LITE,               "DViCO FusionHDTV DVB-T Lite" },
 395         { 0xd50018ac, BTTV_BOARD_DVICO_FUSIONHDTV_5_LITE,       "DViCO FusionHDTV 5 Lite" },
 396         { 0x20007063, BTTV_BOARD_PC_HDTV,                       "pcHDTV HD-2000 TV"},
 397         { 0, -1, NULL }
 398 };
 399
 400
 401 /***********************/
 402 /* PCI device handling */
 403 /***********************/
 404
 405 static int __devinit bt878_probe(struct pci_dev *dev,
 406                                  const struct pci_device_id *pci_id)
 407 {
 408         int result = 0, has_dvb = 0, i;
 409         unsigned char lat;
 410         struct bt878 *bt;
 411 #if defined(__powerpc__)
 412         unsigned int cmd;
 413 #endif
 414         unsigned int cardid;
 415         unsigned short id;
 416         struct cards *dvb_cards;
 417
 418         printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
 419                bt878_num);
 420         if (bt878_num >= BT878_MAX) {
 421                 printk(KERN_ERR "bt878: Too many devices inserted\n");
 422                 result = -ENOMEM;
 423                 goto fail0;
 424         }
 425         if (pci_enable_device(dev))
 426                 return -EIO;
 427
 428         pci_read_config_word(dev, PCI_SUBSYSTEM_ID, &id);
 429         cardid = id << 16;
 430         pci_read_config_word(dev, PCI_SUBSYSTEM_VENDOR_ID, &id);
 431         cardid |= id;
 432
 433         for (i = 0, dvb_cards = card_list; i < ARRAY_SIZE(card_list); i++, dvb_cards++) {
 434                 if (cardid == dvb_cards->pci_id) {
 435                         printk("%s: card id=[0x%x],[ %s ] has DVB functions.\n",
 436                                 __func__, cardid, dvb_cards->name);
 437                         has_dvb = 1;
 438                 }
 439         }
 440
 441         if (!has_dvb) {
 442                 printk("%s: card id=[0x%x], Unknown card.\nExiting..\n", __func__, cardid);
 443                 result = -EINVAL;
 444
 445                 goto fail0;
 446         }
 447
 448         bt = &bt878[bt878_num];
 449         bt->dev = dev;
 450         bt->nr = bt878_num;
 451         bt->shutdown = 0;
 452
 453         bt->id = dev->device;
 454         bt->irq = dev->irq;
 455         bt->bt878_adr = pci_resource_start(dev, 0);
 456         if (!request_mem_region(pci_resource_start(dev, 0),
 457                                 pci_resource_len(dev, 0), "bt878")) {
 458                 result = -EBUSY;
 459                 goto fail0;
 460         }
 461
 462         pci_read_config_byte(dev, PCI_CLASS_REVISION, &bt->revision);
 463         pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
 464
 465
 466         printk(KERN_INFO "bt878(%d): Bt%x (rev %d) at %02x:%02x.%x, ",
 467                bt878_num, bt->id, bt->revision, dev->bus->number,
 468                PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 469         printk("irq: %d, latency: %d, memory: 0x%lx\n",
 470                bt->irq, lat, bt->bt878_adr);
 471
 472
 473 #if defined(__powerpc__)
 474         /* on OpenFirmware machines (PowerMac at least), PCI memory cycle */
 475         /* response on cards with no firmware is not enabled by OF */
 476         pci_read_config_dword(dev, PCI_COMMAND, &cmd);
 477         cmd = (cmd | PCI_COMMAND_MEMORY);
 478         pci_write_config_dword(dev, PCI_COMMAND, cmd);
 479 #endif
 480
 481 #ifdef __sparc__
 482         bt->bt878_mem = (unsigned char *) bt->bt878_adr;
 483 #else
 484         bt->bt878_mem = ioremap(bt->bt878_adr, 0x1000);
 485 #endif
 486
 487         /* clear interrupt mask */
 488         btwrite(0, BT848_INT_MASK);
 489
 490         result = request_irq(bt->irq, bt878_irq,
 491                              SA_SHIRQ | SA_INTERRUPT, "bt878",
 492                              (void *) bt);
 493         if (result == -EINVAL) {
 494                 printk(KERN_ERR "bt878(%d): Bad irq number or handler\n",
 495                        bt878_num);
 496                 goto fail1;
 497         }
 498         if (result == -EBUSY) {
 499                 printk(KERN_ERR
 500                        "bt878(%d): IRQ %d busy, change your PnP config in BIOS\n",
 501                        bt878_num, bt->irq);
 502                 goto fail1;
 503         }
 504         if (result < 0)
 505                 goto fail1;
 506
 507         pci_set_master(dev);
 508         pci_set_drvdata(dev, bt);
 509
 510 /*        if(init_bt878(btv) < 0) {
 511                 bt878_remove(dev);
 512                 return -EIO;
 513         }
 514 */
 515
 516         if ((result = bt878_mem_alloc(bt))) {
 517                 printk("bt878: failed to allocate memory!\n");
 518                 goto fail2;
 519         }
 520
 521         bt878_make_risc(bt);
 522         btwrite(0, BT878_AINT_MASK);
 523         bt878_num++;
 524
 525         return 0;
 526
 527       fail2:
 528         free_irq(bt->irq, bt);
 529       fail1:
 530         release_mem_region(pci_resource_start(bt->dev, 0),
 531                            pci_resource_len(bt->dev, 0));
 532       fail0:
 533         pci_disable_device(dev);
 534         return result;
 535 }
 536
 537 static void __devexit bt878_remove(struct pci_dev *pci_dev)
 538 {
 539         u8 command;
 540         struct bt878 *bt = pci_get_drvdata(pci_dev);
 541
 542         if (bt878_verbose)
 543                 printk("bt878(%d): unloading\n", bt->nr);
 544
 545         /* turn off all capturing, DMA and IRQs */
 546         btand(~0x13, BT878_AGPIO_DMA_CTL);
 547
 548         /* first disable interrupts before unmapping the memory! */
 549         btwrite(0, BT878_AINT_MASK);
 550         btwrite(~0U, BT878_AINT_STAT);
 551
 552         /* disable PCI bus-mastering */
 553         pci_read_config_byte(bt->dev, PCI_COMMAND, &command);
 554         /* Should this be &=~ ?? */
 555         command &= ~PCI_COMMAND_MASTER;
 556         pci_write_config_byte(bt->dev, PCI_COMMAND, command);
 557
 558         free_irq(bt->irq, bt);
 559         printk(KERN_DEBUG "bt878_mem: 0x%p.\n", bt->bt878_mem);
 560         if (bt->bt878_mem)
 561                 iounmap(bt->bt878_mem);
 562
 563         release_mem_region(pci_resource_start(bt->dev, 0),
 564                            pci_resource_len(bt->dev, 0));
 565         /* wake up any waiting processes
 566            because shutdown flag is set, no new processes (in this queue)
 567            are expected
 568          */
 569         bt->shutdown = 1;
 570         bt878_mem_free(bt);
 571
 572         pci_set_drvdata(pci_dev, NULL);
 573         pci_disable_device(pci_dev);
 574         return;
 575 }
 576
 577 static struct pci_device_id bt878_pci_tbl[] __devinitdata = {
 578         {PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BROOKTREE_878,
 579          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 580         {0,}
 581 };
 582
 583 MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);
 584
 585 static struct pci_driver bt878_pci_driver = {
 586       .name     = "bt878",
 587       .id_table = bt878_pci_tbl,
 588       .probe    = bt878_probe,
 589       .remove   = bt878_remove,
 590 };
 591
 592 static int bt878_pci_driver_registered;
 593
 594 /*******************************/
 595 /* Module management functions */
 596 /*******************************/
 597
 598 static int bt878_init_module(void)
 599 {
 600         bt878_num = 0;
 601         bt878_pci_driver_registered = 0;
 602
 603         printk(KERN_INFO "bt878: AUDIO driver version %d.%d.%d loaded\n",
 604                (BT878_VERSION_CODE >> 16) & 0xff,
 605                (BT878_VERSION_CODE >> 8) & 0xff,
 606                BT878_VERSION_CODE & 0xff);
 607 /*
 608         bt878_check_chipset();
 609 */
 610         /* later we register inside of bt878_find_audio_dma()
 611          * because we may want to ignore certain cards */
 612         bt878_pci_driver_registered = 1;
 613         return pci_register_driver(&bt878_pci_driver);
 614 }
 615
 616 static void bt878_cleanup_module(void)
 617 {
 618         if (bt878_pci_driver_registered) {
 619                 bt878_pci_driver_registered = 0;
 620                 pci_unregister_driver(&bt878_pci_driver);
 621         }
 622         return;
 623 }
 624
 625 module_init(bt878_init_module);
 626 module_exit(bt878_cleanup_module);
 627
 628 //MODULE_AUTHOR("XXX");
 629 MODULE_LICENSE("GPL");
 630
 631 /*
 632  * Local variables:
 633  * c-basic-offset: 8
 634  * End:
 635  */