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/kernel.h>
  32 #include <linux/pci.h>
  33 #include <asm/io.h>
  34 #include <linux/ioport.h>
  35 #include <asm/pgtable.h>
  36 #include <asm/page.h>
  37 #include <linux/types.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/kmod.h>
  40 #include <linux/vmalloc.h>
  41 #include <linux/init.h>
  42
  43 #include "dmxdev.h"
  44 #include "dvbdev.h"
  45 #include "bt878.h"
  46 #include "dst_priv.h"
  47
  48
  49 /**************************************/
  50 /* Miscellaneous utility  definitions */
  51 /**************************************/
  52
  53 static unsigned int bt878_verbose = 1;
  54 static unsigned int bt878_debug;
  55
  56 module_param_named(verbose, bt878_verbose, int, 0444);
  57 MODULE_PARM_DESC(verbose,
  58                  "verbose startup messages, default is 1 (yes)");
  59 module_param_named(debug, bt878_debug, int, 0644);
  60 MODULE_PARM_DESC(debug, "Turn on/off debugging, default is 0 (off).");
  61
  62 int bt878_num;
  63 struct bt878 bt878[BT878_MAX];
  64
  65 EXPORT_SYMBOL(bt878_num);
  66 EXPORT_SYMBOL(bt878);
  67
  68 #define btwrite(dat,adr)    bmtwrite((dat), (bt->bt878_mem+(adr)))
  69 #define btread(adr)         bmtread(bt->bt878_mem+(adr))
  70
  71 #define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
  72 #define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
  73 #define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)
  74
  75 #if defined(dprintk)
  76 #undef dprintk
  77 #endif
  78 #define dprintk(fmt, arg...) \
  79         do { \
  80                 if (bt878_debug) \
  81                         printk(KERN_DEBUG fmt, ##arg); \
  82         } while (0)
  83
  84 static void bt878_mem_free(struct bt878 *bt)
  85 {
  86         if (bt->buf_cpu) {
  87                 pci_free_consistent(bt->dev, bt->buf_size, bt->buf_cpu,
  88                                     bt->buf_dma);
  89                 bt->buf_cpu = NULL;
  90         }
  91
  92         if (bt->risc_cpu) {
  93                 pci_free_consistent(bt->dev, bt->risc_size, bt->risc_cpu,
  94                                     bt->risc_dma);
  95                 bt->risc_cpu = NULL;
  96         }
  97 }
  98
  99 static int bt878_mem_alloc(struct bt878 *bt)
 100 {
 101         if (!bt->buf_cpu) {
 102                 bt->buf_size = 128 * 1024;
 103
 104                 bt->buf_cpu =
 105                     pci_alloc_consistent(bt->dev, bt->buf_size,
 106                                          &bt->buf_dma);
 107
 108                 if (!bt->buf_cpu)
 109                         return -ENOMEM;
 110
 111                 memset(bt->buf_cpu, 0, bt->buf_size);
 112         }
 113
 114         if (!bt->risc_cpu) {
 115                 bt->risc_size = PAGE_SIZE;
 116                 bt->risc_cpu =
 117                     pci_alloc_consistent(bt->dev, bt->risc_size,
 118                                          &bt->risc_dma);
 119
 120                 if (!bt->risc_cpu) {
 121                         bt878_mem_free(bt);
 122                         return -ENOMEM;
 123                 }
 124
 125                 memset(bt->risc_cpu, 0, bt->risc_size);
 126         }
 127
 128         return 0;
 129 }
 130
 131 /* RISC instructions */
 132 #define RISC_WRITE              (0x01 << 28)
 133 #define RISC_JUMP               (0x07 << 28)
 134 #define RISC_SYNC               (0x08 << 28)
 135
 136 /* RISC bits */
 137 #define RISC_WR_SOL             (1 << 27)
 138 #define RISC_WR_EOL             (1 << 26)
 139 #define RISC_IRQ                (1 << 24)
 140 #define RISC_STATUS(status)     ((((~status) & 0x0F) << 20) | ((status & 0x0F) << 16))
 141 #define RISC_SYNC_RESYNC        (1 << 15)
 142 #define RISC_SYNC_FM1           0x06
 143 #define RISC_SYNC_VRO           0x0C
 144
 145 #define RISC_FLUSH()            bt->risc_pos = 0
 146 #define RISC_INSTR(instr)       bt->risc_cpu[bt->risc_pos++] = cpu_to_le32(instr)
 147
 148 static int bt878_make_risc(struct bt878 *bt)
 149 {
 150         bt->block_bytes = bt->buf_size >> 4;
 151         bt->block_count = 1 << 4;
 152         bt->line_bytes = bt->block_bytes;
 153         bt->line_count = bt->block_count;
 154
 155         while (bt->line_bytes > 4095) {
 156                 bt->line_bytes >>= 1;
 157                 bt->line_count <<= 1;
 158         }
 159
 160         if (bt->line_count > 255) {
 161                 printk(KERN_ERR "bt878: buffer size error!\n");
 162                 return -EINVAL;
 163         }
 164         return 0;
 165 }
 166
 167
 168 static void bt878_risc_program(struct bt878 *bt, u32 op_sync_orin)
 169 {
 170         u32 buf_pos = 0;
 171         u32 line;
 172
 173         RISC_FLUSH();
 174         RISC_INSTR(RISC_SYNC | RISC_SYNC_FM1 | op_sync_orin);
 175         RISC_INSTR(0);
 176
 177         dprintk("bt878: risc len lines %u, bytes per line %u\n",
 178                         bt->line_count, bt->line_bytes);
 179         for (line = 0; line < bt->line_count; line++) {
 180                 // At the beginning of every block we issue an IRQ with previous (finished) block number set
 181                 if (!(buf_pos % bt->block_bytes))
 182                         RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 183                                    RISC_IRQ |
 184                                    RISC_STATUS(((buf_pos /
 185                                                  bt->block_bytes) +
 186                                                 (bt->block_count -
 187                                                  1)) %
 188                                                bt->block_count) | bt->
 189                                    line_bytes);
 190                 else
 191                         RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
 192                                    bt->line_bytes);
 193                 RISC_INSTR(bt->buf_dma + buf_pos);
 194                 buf_pos += bt->line_bytes;
 195         }
 196
 197         RISC_INSTR(RISC_SYNC | op_sync_orin | RISC_SYNC_VRO);
 198         RISC_INSTR(0);
 199
 200         RISC_INSTR(RISC_JUMP);
 201         RISC_INSTR(bt->risc_dma);
 202
 203         btwrite((bt->line_count << 16) | bt->line_bytes, BT878_APACK_LEN);
 204 }
 205
 206 /*****************************/
 207 /* Start/Stop grabbing funcs */
 208 /*****************************/
 209
 210 void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
 211                 u32 irq_err_ignore)
 212 {
 213         u32 int_mask;
 214
 215         dprintk("bt878 debug: bt878_start (ctl=%8.8x)\n", controlreg);
 216         /* complete the writing of the risc dma program now we have
 217          * the card specifics
 218          */
 219         bt878_risc_program(bt, op_sync_orin);
 220         controlreg &= ~0x1f;
 221         controlreg |= 0x1b;
 222
 223         btwrite(bt->risc_dma, BT878_ARISC_START);
 224
 225         /* original int mask had :
 226          *    6    2    8    4    0
 227          * 1111 1111 1000 0000 0000
 228          * SCERR|OCERR|PABORT|RIPERR|FDSR|FTRGT|FBUS|RISCI
 229          * Hacked for DST to:
 230          * SCERR | OCERR | FDSR | FTRGT | FBUS | RISCI
 231          */
 232         int_mask = BT878_ASCERR | BT878_AOCERR | BT878_APABORT |
 233                 BT878_ARIPERR | BT878_APPERR | BT878_AFDSR | BT878_AFTRGT |
 234                 BT878_AFBUS | BT878_ARISCI;
 235
 236
 237         /* ignore pesky bits */
 238         int_mask &= ~irq_err_ignore;
 239
 240         btwrite(int_mask, BT878_AINT_MASK);
 241         btwrite(controlreg, BT878_AGPIO_DMA_CTL);
 242 }
 243
 244 void bt878_stop(struct bt878 *bt)
 245 {
 246         u32 stat;
 247         int i = 0;
 248
 249         dprintk("bt878 debug: bt878_stop\n");
 250
 251         btwrite(0, BT878_AINT_MASK);
 252         btand(~0x13, BT878_AGPIO_DMA_CTL);
 253
 254         do {
 255                 stat = btread(BT878_AINT_STAT);
 256                 if (!(stat & BT878_ARISC_EN))
 257                         break;
 258                 i++;
 259         } while (i < 500);
 260
 261         dprintk("bt878(%d) debug: bt878_stop, i=%d, stat=0x%8.8x\n",
 262                 bt->nr, i, stat);
 263 }
 264
 265 EXPORT_SYMBOL(bt878_start);
 266 EXPORT_SYMBOL(bt878_stop);
 267
 268 /*****************************/
 269 /* Interrupt service routine */
 270 /*****************************/
 271
 272 static irqreturn_t bt878_irq(int irq, void *dev_id)
 273 {
 274         u32 stat, astat, mask;
 275         int count;
 276         struct bt878 *bt;
 277
 278         bt = (struct bt878 *) dev_id;
 279
 280         count = 0;
 281         while (1) {
 282                 stat = btread(BT878_AINT_STAT);
 283                 mask = btread(BT878_AINT_MASK);
 284                 if (!(astat = (stat & mask)))
 285                         return IRQ_NONE;        /* this interrupt is not for me */
 286 /*              dprintk("bt878(%d) debug: irq count %d, stat 0x%8.8x, mask 0x%8.8x\n",bt->nr,count,stat,mask); */
 287                 btwrite(astat, BT878_AINT_STAT);        /* try to clear interrupt condition */
 288
 289
 290                 if (astat & (BT878_ASCERR | BT878_AOCERR)) {
 291                         if (bt878_verbose) {
 292                                 printk(KERN_INFO
 293                                        "bt878(%d): irq%s%s risc_pc=%08x\n",
 294                                        bt->nr,
 295                                        (astat & BT878_ASCERR) ? " SCERR" :
 296                                        "",
 297                                        (astat & BT878_AOCERR) ? " OCERR" :
 298                                        "", btread(BT878_ARISC_PC));
 299                         }
 300                 }
 301                 if (astat & (BT878_APABORT | BT878_ARIPERR | BT878_APPERR)) {
 302                         if (bt878_verbose) {
 303                                 printk(KERN_INFO
 304                                      "bt878(%d): irq%s%s%s risc_pc=%08x\n",
 305                                      bt->nr,
 306                                      (astat & BT878_APABORT) ? " PABORT" :
 307                                      "",
 308                                      (astat & BT878_ARIPERR) ? " RIPERR" :
 309                                      "",
 310                                      (astat & BT878_APPERR) ? " PPERR" :
 311                                      "", btread(BT878_ARISC_PC));
 312                         }
 313                 }
 314                 if (astat & (BT878_AFDSR | BT878_AFTRGT | BT878_AFBUS)) {
 315                         if (bt878_verbose) {
 316                                 printk(KERN_INFO
 317                                      "bt878(%d): irq%s%s%s risc_pc=%08x\n",
 318                                      bt->nr,
 319                                      (astat & BT878_AFDSR) ? " FDSR" : "",
 320                                      (astat & BT878_AFTRGT) ? " FTRGT" :
 321                                      "",
 322                                      (astat & BT878_AFBUS) ? " FBUS" : "",
 323                                      btread(BT878_ARISC_PC));
 324                         }
 325                 }
 326                 if (astat & BT878_ARISCI) {
 327                         bt->finished_block = (stat & BT878_ARISCS) >> 28;
 328                         tasklet_schedule(&bt->tasklet);
 329                         break;
 330                 }
 331                 count++;
 332                 if (count > 20) {
 333                         btwrite(0, BT878_AINT_MASK);
 334                         printk(KERN_ERR
 335                                "bt878(%d): IRQ lockup, cleared int mask\n",
 336                                bt->nr);
 337                         break;
 338                 }
 339         }
 340         return IRQ_HANDLED;
 341 }
 342
 343 int
 344 bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *mp)
 345 {
 346         int retval;
 347
 348         retval = 0;
 349         if (mutex_lock_interruptible(&bt->gpio_lock))
 350                 return -ERESTARTSYS;
 351         /* special gpio signal */
 352         switch (cmd) {
 353             case DST_IG_ENABLE:
 354                 // dprintk("dvb_bt8xx: dst enable mask 0x%02x enb 0x%02x \n", mp->dstg.enb.mask, mp->dstg.enb.enable);
 355                 retval = bttv_gpio_enable(bt->bttv_nr,
 356                                 mp->enb.mask,
 357                                 mp->enb.enable);
 358                 break;
 359             case DST_IG_WRITE:
 360                 // dprintk("dvb_bt8xx: dst write gpio mask 0x%02x out 0x%02x\n", mp->dstg.outp.mask, mp->dstg.outp.highvals);
 361                 retval = bttv_write_gpio(bt->bttv_nr,
 362                                 mp->outp.mask,
 363                                 mp->outp.highvals);
 364
 365                 break;
 366             case DST_IG_READ:
 367                 /* read */
 368                 retval =  bttv_read_gpio(bt->bttv_nr, &mp->rd.value);
 369                 // dprintk("dvb_bt8xx: dst read gpio 0x%02x\n", (unsigned)mp->dstg.rd.value);
 370                 break;
 371             case DST_IG_TS:
 372                 /* Set packet size */
 373                 bt->TS_Size = mp->psize;
 374                 break;
 375
 376             default:
 377                 retval = -EINVAL;
 378                 break;
 379         }
 380         mutex_unlock(&bt->gpio_lock);
 381         return retval;
 382 }
 383
 384 EXPORT_SYMBOL(bt878_device_control);
 385
 386 #define BROOKTREE_878_DEVICE(vend, dev, name) \
 387         { \
 388                 .vendor = PCI_VENDOR_ID_BROOKTREE, \
 389                 .device = PCI_DEVICE_ID_BROOKTREE_878, \
 390                 .subvendor = (vend), .subdevice = (dev), \
 391                 .driver_data = (unsigned long) name \
 392         }
 393
 394 static struct pci_device_id bt878_pci_tbl[] __devinitdata = {
 395         BROOKTREE_878_DEVICE(0x0071, 0x0101, "Nebula Electronics DigiTV"),
 396         BROOKTREE_878_DEVICE(0x1461, 0x0761, "AverMedia AverTV DVB-T 761"),
 397         BROOKTREE_878_DEVICE(0x11bd, 0x001c, "Pinnacle PCTV Sat"),
 398         BROOKTREE_878_DEVICE(0x11bd, 0x0026, "Pinnacle PCTV SAT CI"),
 399         BROOKTREE_878_DEVICE(0x1822, 0x0001, "Twinhan VisionPlus DVB"),
 400         BROOKTREE_878_DEVICE(0x270f, 0xfc00,
 401                                 "ChainTech digitop DST-1000 DVB-S"),
 402         BROOKTREE_878_DEVICE(0x1461, 0x0771, "AVermedia AverTV DVB-T 771"),
 403         BROOKTREE_878_DEVICE(0x18ac, 0xdb10, "DViCO FusionHDTV DVB-T Lite"),
 404         BROOKTREE_878_DEVICE(0x18ac, 0xdb11, "Ultraview DVB-T Lite"),
 405         BROOKTREE_878_DEVICE(0x18ac, 0xd500, "DViCO FusionHDTV 5 Lite"),
 406         BROOKTREE_878_DEVICE(0x7063, 0x2000, "pcHDTV HD-2000 TV"),
 407         BROOKTREE_878_DEVICE(0x1822, 0x0026, "DNTV Live! Mini"),
 408         { }
 409 };
 410
 411 MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);
 412
 413 static const char * __devinit card_name(const struct pci_device_id *id)
 414 {
 415         return id->driver_data ? (const char *)id->driver_data : "Unknown";
 416 }
 417
 418 /***********************/
 419 /* PCI device handling */
 420 /***********************/
 421
 422 static int __devinit bt878_probe(struct pci_dev *dev,
 423                                  const struct pci_device_id *pci_id)
 424 {
 425         int result = 0;
 426         unsigned char lat;
 427         struct bt878 *bt;
 428 #if defined(__powerpc__)
 429         unsigned int cmd;
 430 #endif
 431         unsigned int cardid;
 432
 433         printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
 434                bt878_num);
 435         if (bt878_num >= BT878_MAX) {
 436                 printk(KERN_ERR "bt878: Too many devices inserted\n");
 437                 result = -ENOMEM;
 438                 goto fail0;
 439         }
 440         if (pci_enable_device(dev))
 441                 return -EIO;
 442
 443         cardid = dev->subsystem_device << 16;
 444         cardid |= dev->subsystem_vendor;
 445
 446         printk(KERN_INFO "%s: card id=[0x%x],[ %s ] has DVB functions.\n",
 447                                 __func__, cardid, card_name(pci_id));
 448
 449         bt = &bt878[bt878_num];
 450         bt->dev = dev;
 451         bt->nr = bt878_num;
 452         bt->shutdown = 0;
 453
 454         bt->id = dev->device;
 455         bt->irq = dev->irq;
 456         bt->bt878_adr = pci_resource_start(dev, 0);
 457         if (!request_mem_region(pci_resource_start(dev, 0),
 458                                 pci_resource_len(dev, 0), "bt878")) {
 459                 result = -EBUSY;
 460                 goto fail0;
 461         }
 462
 463         pci_read_config_byte(dev, PCI_CLASS_REVISION, &bt->revision);
 464         pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
 465
 466
 467         printk(KERN_INFO "bt878(%d): Bt%x (rev %d) at %02x:%02x.%x, ",
 468                bt878_num, bt->id, bt->revision, dev->bus->number,
 469                PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
 470         printk("irq: %d, latency: %d, memory: 0x%lx\n",
 471                bt->irq, lat, bt->bt878_adr);
 472
 473
 474 #if defined(__powerpc__)
 475         /* on OpenFirmware machines (PowerMac at least), PCI memory cycle */
 476         /* response on cards with no firmware is not enabled by OF */
 477         pci_read_config_dword(dev, PCI_COMMAND, &cmd);
 478         cmd = (cmd | PCI_COMMAND_MEMORY);
 479         pci_write_config_dword(dev, PCI_COMMAND, cmd);
 480 #endif
 481
 482 #ifdef __sparc__
 483         bt->bt878_mem = (unsigned char *) bt->bt878_adr;
 484 #else
 485         bt->bt878_mem = ioremap(bt->bt878_adr, 0x1000);
 486 #endif
 487
 488         /* clear interrupt mask */
 489         btwrite(0, BT848_INT_MASK);
 490
 491         result = request_irq(bt->irq, bt878_irq,
 492                              IRQF_SHARED | IRQF_DISABLED, "bt878",
 493                              (void *) bt);
 494         if (result == -EINVAL) {
 495                 printk(KERN_ERR "bt878(%d): Bad irq number or handler\n",
 496                        bt878_num);
 497                 goto fail1;
 498         }
 499         if (result == -EBUSY) {
 500                 printk(KERN_ERR
 501                        "bt878(%d): IRQ %d busy, change your PnP config in BIOS\n",
 502                        bt878_num, bt->irq);
 503                 goto fail1;
 504         }
 505         if (result < 0)
 506                 goto fail1;
 507
 508         pci_set_master(dev);
 509         pci_set_drvdata(dev, bt);
 510
 511         if ((result = bt878_mem_alloc(bt))) {
 512                 printk(KERN_ERR "bt878: failed to allocate memory!\n");
 513                 goto fail2;
 514         }
 515
 516         bt878_make_risc(bt);
 517         btwrite(0, BT878_AINT_MASK);
 518         bt878_num++;
 519
 520         return 0;
 521
 522       fail2:
 523         free_irq(bt->irq, bt);
 524       fail1:
 525         release_mem_region(pci_resource_start(bt->dev, 0),
 526                            pci_resource_len(bt->dev, 0));
 527       fail0:
 528         pci_disable_device(dev);
 529         return result;
 530 }
 531
 532 static void __devexit bt878_remove(struct pci_dev *pci_dev)
 533 {
 534         u8 command;
 535         struct bt878 *bt = pci_get_drvdata(pci_dev);
 536
 537         if (bt878_verbose)
 538                 printk(KERN_INFO "bt878(%d): unloading\n", bt->nr);
 539
 540         /* turn off all capturing, DMA and IRQs */
 541         btand(~0x13, BT878_AGPIO_DMA_CTL);
 542
 543         /* first disable interrupts before unmapping the memory! */
 544         btwrite(0, BT878_AINT_MASK);
 545         btwrite(~0U, BT878_AINT_STAT);
 546
 547         /* disable PCI bus-mastering */
 548         pci_read_config_byte(bt->dev, PCI_COMMAND, &command);
 549         /* Should this be &=~ ?? */
 550         command &= ~PCI_COMMAND_MASTER;
 551         pci_write_config_byte(bt->dev, PCI_COMMAND, command);
 552
 553         free_irq(bt->irq, bt);
 554         printk(KERN_DEBUG "bt878_mem: 0x%p.\n", bt->bt878_mem);
 555         if (bt->bt878_mem)
 556                 iounmap(bt->bt878_mem);
 557
 558         release_mem_region(pci_resource_start(bt->dev, 0),
 559                            pci_resource_len(bt->dev, 0));
 560         /* wake up any waiting processes
 561            because shutdown flag is set, no new processes (in this queue)
 562            are expected
 563          */
 564         bt->shutdown = 1;
 565         bt878_mem_free(bt);
 566
 567         pci_set_drvdata(pci_dev, NULL);
 568         pci_disable_device(pci_dev);
 569         return;
 570 }
 571
 572 static struct pci_driver bt878_pci_driver = {
 573       .name     = "bt878",
 574       .id_table = bt878_pci_tbl,
 575       .probe    = bt878_probe,
 576       .remove   = __devexit_p(bt878_remove),
 577 };
 578
 579 static int bt878_pci_driver_registered;
 580
 581 /*******************************/
 582 /* Module management functions */
 583 /*******************************/
 584
 585 static int bt878_init_module(void)
 586 {
 587         bt878_num = 0;
 588         bt878_pci_driver_registered = 0;
 589
 590         printk(KERN_INFO "bt878: AUDIO driver version %d.%d.%d loaded\n",
 591                (BT878_VERSION_CODE >> 16) & 0xff,
 592                (BT878_VERSION_CODE >> 8) & 0xff,
 593                BT878_VERSION_CODE & 0xff);
 594 /*
 595         bt878_check_chipset();
 596 */
 597         /* later we register inside of bt878_find_audio_dma()
 598          * because we may want to ignore certain cards */
 599         bt878_pci_driver_registered = 1;
 600         return pci_register_driver(&bt878_pci_driver);
 601 }
 602
 603 static void bt878_cleanup_module(void)
 604 {
 605         if (bt878_pci_driver_registered) {
 606                 bt878_pci_driver_registered = 0;
 607                 pci_unregister_driver(&bt878_pci_driver);
 608         }
 609         return;
 610 }
 611
 612 module_init(bt878_init_module);
 613 module_exit(bt878_cleanup_module);
 614
 615 //MODULE_AUTHOR("XXX");
 616 MODULE_LICENSE("GPL");
 617
 618 /*
 619  * Local variables:
 620  * c-basic-offset: 8
 621  * End:
 622  */