1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ALSA modem driver for VIA VT82xx (South Bridge) 4 * 5 * VT82C686A/B/C, VT8233A/C, VT8235 6 * 7 * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz> 8 * Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com> 9 * 2002 Takashi Iwai <tiwai@suse.de> 10 */ 11 12 /* 13 * Changes: 14 * 15 * Sep. 2, 2004 Sasha Khapyorsky <sashak@alsa-project.org> 16 * Modified from original audio driver 'via82xx.c' to support AC97 17 * modems. 18 */ 19 20 #include <linux/io.h> 21 #include <linux/delay.h> 22 #include <linux/interrupt.h> 23 #include <linux/init.h> 24 #include <linux/pci.h> 25 #include <linux/slab.h> 26 #include <linux/module.h> 27 #include <sound/core.h> 28 #include <sound/pcm.h> 29 #include <sound/pcm_params.h> 30 #include <sound/info.h> 31 #include <sound/ac97_codec.h> 32 #include <sound/initval.h> 33 34 #if 0 35 #define POINTER_DEBUG 36 #endif 37 38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 39 MODULE_DESCRIPTION("VIA VT82xx modem"); 40 MODULE_LICENSE("GPL"); 41 42 static int index = -2; /* Exclude the first card */ 43 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ 44 static int ac97_clock = 48000; 45 46 module_param(index, int, 0444); 47 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge."); 48 module_param(id, charp, 0444); 49 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge."); 50 module_param(ac97_clock, int, 0444); 51 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz)."); 52 53 /* just for backward compatibility */ 54 static bool enable; 55 module_param(enable, bool, 0444); 56 57 58 /* 59 * Direct registers 60 */ 61 62 #define VIAREG(via, x) ((via)->port + VIA_REG_##x) 63 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x) 64 65 /* common offsets */ 66 #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */ 67 #define VIA_REG_STAT_ACTIVE 0x80 /* RO */ 68 #define VIA_REG_STAT_PAUSED 0x40 /* RO */ 69 #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */ 70 #define VIA_REG_STAT_STOPPED 0x04 /* RWC */ 71 #define VIA_REG_STAT_EOL 0x02 /* RWC */ 72 #define VIA_REG_STAT_FLAG 0x01 /* RWC */ 73 #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */ 74 #define VIA_REG_CTRL_START 0x80 /* WO */ 75 #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */ 76 #define VIA_REG_CTRL_AUTOSTART 0x20 77 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */ 78 #define VIA_REG_CTRL_INT_STOP 0x04 79 #define VIA_REG_CTRL_INT_EOL 0x02 80 #define VIA_REG_CTRL_INT_FLAG 0x01 81 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */ 82 #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART) 83 #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */ 84 #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */ 85 #define VIA_REG_TYPE_16BIT 0x20 /* RW */ 86 #define VIA_REG_TYPE_STEREO 0x10 /* RW */ 87 #define VIA_REG_TYPE_INT_LLINE 0x00 88 #define VIA_REG_TYPE_INT_LSAMPLE 0x04 89 #define VIA_REG_TYPE_INT_LESSONE 0x08 90 #define VIA_REG_TYPE_INT_MASK 0x0c 91 #define VIA_REG_TYPE_INT_EOL 0x02 92 #define VIA_REG_TYPE_INT_FLAG 0x01 93 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */ 94 #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */ 95 #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */ 96 #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */ 97 #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */ 98 99 #define DEFINE_VIA_REGSET(name,val) \ 100 enum {\ 101 VIA_REG_##name##_STATUS = (val),\ 102 VIA_REG_##name##_CONTROL = (val) + 0x01,\ 103 VIA_REG_##name##_TYPE = (val) + 0x02,\ 104 VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\ 105 VIA_REG_##name##_CURR_PTR = (val) + 0x04,\ 106 VIA_REG_##name##_STOP_IDX = (val) + 0x08,\ 107 VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\ 108 } 109 110 /* modem block */ 111 DEFINE_VIA_REGSET(MO, 0x40); 112 DEFINE_VIA_REGSET(MI, 0x50); 113 114 /* AC'97 */ 115 #define VIA_REG_AC97 0x80 /* dword */ 116 #define VIA_REG_AC97_CODEC_ID_MASK (3<<30) 117 #define VIA_REG_AC97_CODEC_ID_SHIFT 30 118 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00 119 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01 120 #define VIA_REG_AC97_SECONDARY_VALID (1<<27) 121 #define VIA_REG_AC97_PRIMARY_VALID (1<<25) 122 #define VIA_REG_AC97_BUSY (1<<24) 123 #define VIA_REG_AC97_READ (1<<23) 124 #define VIA_REG_AC97_CMD_SHIFT 16 125 #define VIA_REG_AC97_CMD_MASK 0x7e 126 #define VIA_REG_AC97_DATA_SHIFT 0 127 #define VIA_REG_AC97_DATA_MASK 0xffff 128 129 #define VIA_REG_SGD_SHADOW 0x84 /* dword */ 130 #define VIA_REG_SGD_STAT_PB_FLAG (1<<0) 131 #define VIA_REG_SGD_STAT_CP_FLAG (1<<1) 132 #define VIA_REG_SGD_STAT_FM_FLAG (1<<2) 133 #define VIA_REG_SGD_STAT_PB_EOL (1<<4) 134 #define VIA_REG_SGD_STAT_CP_EOL (1<<5) 135 #define VIA_REG_SGD_STAT_FM_EOL (1<<6) 136 #define VIA_REG_SGD_STAT_PB_STOP (1<<8) 137 #define VIA_REG_SGD_STAT_CP_STOP (1<<9) 138 #define VIA_REG_SGD_STAT_FM_STOP (1<<10) 139 #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12) 140 #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13) 141 #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14) 142 #define VIA_REG_SGD_STAT_MR_FLAG (1<<16) 143 #define VIA_REG_SGD_STAT_MW_FLAG (1<<17) 144 #define VIA_REG_SGD_STAT_MR_EOL (1<<20) 145 #define VIA_REG_SGD_STAT_MW_EOL (1<<21) 146 #define VIA_REG_SGD_STAT_MR_STOP (1<<24) 147 #define VIA_REG_SGD_STAT_MW_STOP (1<<25) 148 #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28) 149 #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29) 150 151 #define VIA_REG_GPI_STATUS 0x88 152 #define VIA_REG_GPI_INTR 0x8c 153 154 #define VIA_TBL_BIT_FLAG 0x40000000 155 #define VIA_TBL_BIT_EOL 0x80000000 156 157 /* pci space */ 158 #define VIA_ACLINK_STAT 0x40 159 #define VIA_ACLINK_C11_READY 0x20 160 #define VIA_ACLINK_C10_READY 0x10 161 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */ 162 #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */ 163 #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */ 164 #define VIA_ACLINK_CTRL 0x41 165 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */ 166 #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */ 167 #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */ 168 #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */ 169 #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */ 170 #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */ 171 #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */ 172 #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */ 173 #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\ 174 VIA_ACLINK_CTRL_RESET|\ 175 VIA_ACLINK_CTRL_PCM) 176 #define VIA_FUNC_ENABLE 0x42 177 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */ 178 #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */ 179 #define VIA_FUNC_RX2C_WRITE 0x20 180 #define VIA_FUNC_SB_FIFO_EMPTY 0x10 181 #define VIA_FUNC_ENABLE_GAME 0x08 182 #define VIA_FUNC_ENABLE_FM 0x04 183 #define VIA_FUNC_ENABLE_MIDI 0x02 184 #define VIA_FUNC_ENABLE_SB 0x01 185 #define VIA_PNP_CONTROL 0x43 186 #define VIA_MC97_CTRL 0x44 187 #define VIA_MC97_CTRL_ENABLE 0x80 188 #define VIA_MC97_CTRL_SECONDARY 0x40 189 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\ 190 VIA_MC97_CTRL_SECONDARY) 191 192 193 /* 194 * pcm stream 195 */ 196 197 struct snd_via_sg_table { 198 unsigned int offset; 199 unsigned int size; 200 } ; 201 202 #define VIA_TABLE_SIZE 255 203 204 struct viadev { 205 unsigned int reg_offset; 206 unsigned long port; 207 int direction; /* playback = 0, capture = 1 */ 208 struct snd_pcm_substream *substream; 209 int running; 210 unsigned int tbl_entries; /* # descriptors */ 211 struct snd_dma_buffer table; 212 struct snd_via_sg_table *idx_table; 213 /* for recovery from the unexpected pointer */ 214 unsigned int lastpos; 215 unsigned int bufsize; 216 unsigned int bufsize2; 217 }; 218 219 enum { TYPE_CARD_VIA82XX_MODEM = 1 }; 220 221 #define VIA_MAX_MODEM_DEVS 2 222 223 struct via82xx_modem { 224 int irq; 225 226 unsigned long port; 227 228 unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */ 229 230 struct pci_dev *pci; 231 struct snd_card *card; 232 233 unsigned int num_devs; 234 unsigned int playback_devno, capture_devno; 235 struct viadev devs[VIA_MAX_MODEM_DEVS]; 236 237 struct snd_pcm *pcms[2]; 238 239 struct snd_ac97_bus *ac97_bus; 240 struct snd_ac97 *ac97; 241 unsigned int ac97_clock; 242 unsigned int ac97_secondary; /* secondary AC'97 codec is present */ 243 244 spinlock_t reg_lock; 245 struct snd_info_entry *proc_entry; 246 }; 247 248 static const struct pci_device_id snd_via82xx_modem_ids[] = { 249 { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, }, 250 { 0, } 251 }; 252 253 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids); 254 255 /* 256 */ 257 258 /* 259 * allocate and initialize the descriptor buffers 260 * periods = number of periods 261 * fragsize = period size in bytes 262 */ 263 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream, 264 struct pci_dev *pci, 265 unsigned int periods, unsigned int fragsize) 266 { 267 unsigned int i, idx, ofs, rest; 268 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 269 __le32 *pgtbl; 270 271 if (dev->table.area == NULL) { 272 /* the start of each lists must be aligned to 8 bytes, 273 * but the kernel pages are much bigger, so we don't care 274 */ 275 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev, 276 PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8), 277 &dev->table) < 0) 278 return -ENOMEM; 279 } 280 if (! dev->idx_table) { 281 dev->idx_table = kmalloc_array(VIA_TABLE_SIZE, 282 sizeof(*dev->idx_table), 283 GFP_KERNEL); 284 if (! dev->idx_table) 285 return -ENOMEM; 286 } 287 288 /* fill the entries */ 289 idx = 0; 290 ofs = 0; 291 pgtbl = (__le32 *)dev->table.area; 292 for (i = 0; i < periods; i++) { 293 rest = fragsize; 294 /* fill descriptors for a period. 295 * a period can be split to several descriptors if it's 296 * over page boundary. 297 */ 298 do { 299 unsigned int r; 300 unsigned int flag; 301 unsigned int addr; 302 303 if (idx >= VIA_TABLE_SIZE) { 304 dev_err(&pci->dev, "too much table size!\n"); 305 return -EINVAL; 306 } 307 addr = snd_pcm_sgbuf_get_addr(substream, ofs); 308 pgtbl[idx << 1] = cpu_to_le32(addr); 309 r = PAGE_SIZE - (ofs % PAGE_SIZE); 310 if (rest < r) 311 r = rest; 312 rest -= r; 313 if (! rest) { 314 if (i == periods - 1) 315 flag = VIA_TBL_BIT_EOL; /* buffer boundary */ 316 else 317 flag = VIA_TBL_BIT_FLAG; /* period boundary */ 318 } else 319 flag = 0; /* period continues to the next */ 320 /* 321 dev_dbg(&pci->dev, 322 "tbl %d: at %d size %d (rest %d)\n", 323 idx, ofs, r, rest); 324 */ 325 pgtbl[(idx<<1) + 1] = cpu_to_le32(r | flag); 326 dev->idx_table[idx].offset = ofs; 327 dev->idx_table[idx].size = r; 328 ofs += r; 329 idx++; 330 } while (rest > 0); 331 } 332 dev->tbl_entries = idx; 333 dev->bufsize = periods * fragsize; 334 dev->bufsize2 = dev->bufsize / 2; 335 return 0; 336 } 337 338 339 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream, 340 struct pci_dev *pci) 341 { 342 if (dev->table.area) { 343 snd_dma_free_pages(&dev->table); 344 dev->table.area = NULL; 345 } 346 kfree(dev->idx_table); 347 dev->idx_table = NULL; 348 return 0; 349 } 350 351 /* 352 * Basic I/O 353 */ 354 355 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip) 356 { 357 return inl(VIAREG(chip, AC97)); 358 } 359 360 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val) 361 { 362 outl(val, VIAREG(chip, AC97)); 363 } 364 365 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary) 366 { 367 unsigned int timeout = 1000; /* 1ms */ 368 unsigned int val; 369 370 while (timeout-- > 0) { 371 udelay(1); 372 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)) 373 return val & 0xffff; 374 } 375 dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n", 376 secondary, snd_via82xx_codec_xread(chip)); 377 return -EIO; 378 } 379 380 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary) 381 { 382 unsigned int timeout = 1000; /* 1ms */ 383 unsigned int val, val1; 384 unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID : 385 VIA_REG_AC97_SECONDARY_VALID; 386 387 while (timeout-- > 0) { 388 val = snd_via82xx_codec_xread(chip); 389 val1 = val & (VIA_REG_AC97_BUSY | stat); 390 if (val1 == stat) 391 return val & 0xffff; 392 udelay(1); 393 } 394 return -EIO; 395 } 396 397 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97) 398 { 399 struct via82xx_modem *chip = ac97->private_data; 400 __always_unused int err; 401 err = snd_via82xx_codec_ready(chip, ac97->num); 402 /* here we need to wait fairly for long time.. */ 403 msleep(500); 404 } 405 406 static void snd_via82xx_codec_write(struct snd_ac97 *ac97, 407 unsigned short reg, 408 unsigned short val) 409 { 410 struct via82xx_modem *chip = ac97->private_data; 411 unsigned int xval; 412 if(reg == AC97_GPIO_STATUS) { 413 outl(val, VIAREG(chip, GPI_STATUS)); 414 return; 415 } 416 xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY; 417 xval <<= VIA_REG_AC97_CODEC_ID_SHIFT; 418 xval |= reg << VIA_REG_AC97_CMD_SHIFT; 419 xval |= val << VIA_REG_AC97_DATA_SHIFT; 420 snd_via82xx_codec_xwrite(chip, xval); 421 snd_via82xx_codec_ready(chip, ac97->num); 422 } 423 424 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg) 425 { 426 struct via82xx_modem *chip = ac97->private_data; 427 unsigned int xval, val = 0xffff; 428 int again = 0; 429 430 xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT; 431 xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID; 432 xval |= VIA_REG_AC97_READ; 433 xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT; 434 while (1) { 435 if (again++ > 3) { 436 dev_err(chip->card->dev, 437 "codec_read: codec %i is not valid [0x%x]\n", 438 ac97->num, snd_via82xx_codec_xread(chip)); 439 return 0xffff; 440 } 441 snd_via82xx_codec_xwrite(chip, xval); 442 udelay (20); 443 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) { 444 udelay(25); 445 val = snd_via82xx_codec_xread(chip); 446 break; 447 } 448 } 449 return val & 0xffff; 450 } 451 452 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev) 453 { 454 outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET, 455 VIADEV_REG(viadev, OFFSET_CONTROL)); 456 inb(VIADEV_REG(viadev, OFFSET_CONTROL)); 457 udelay(50); 458 /* disable interrupts */ 459 outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL)); 460 /* clear interrupts */ 461 outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS)); 462 outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */ 463 // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR)); 464 viadev->lastpos = 0; 465 } 466 467 468 /* 469 * Interrupt handler 470 */ 471 472 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id) 473 { 474 struct via82xx_modem *chip = dev_id; 475 unsigned int status; 476 unsigned int i; 477 478 status = inl(VIAREG(chip, SGD_SHADOW)); 479 if (! (status & chip->intr_mask)) { 480 return IRQ_NONE; 481 } 482 // _skip_sgd: 483 484 /* check status for each stream */ 485 spin_lock(&chip->reg_lock); 486 for (i = 0; i < chip->num_devs; i++) { 487 struct viadev *viadev = &chip->devs[i]; 488 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS)); 489 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED); 490 if (! c_status) 491 continue; 492 if (viadev->substream && viadev->running) { 493 spin_unlock(&chip->reg_lock); 494 snd_pcm_period_elapsed(viadev->substream); 495 spin_lock(&chip->reg_lock); 496 } 497 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */ 498 } 499 spin_unlock(&chip->reg_lock); 500 return IRQ_HANDLED; 501 } 502 503 /* 504 * PCM callbacks 505 */ 506 507 /* 508 * trigger callback 509 */ 510 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 511 { 512 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 513 struct viadev *viadev = substream->runtime->private_data; 514 unsigned char val = 0; 515 516 switch (cmd) { 517 case SNDRV_PCM_TRIGGER_START: 518 case SNDRV_PCM_TRIGGER_SUSPEND: 519 val |= VIA_REG_CTRL_START; 520 viadev->running = 1; 521 break; 522 case SNDRV_PCM_TRIGGER_STOP: 523 val = VIA_REG_CTRL_TERMINATE; 524 viadev->running = 0; 525 break; 526 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 527 val |= VIA_REG_CTRL_PAUSE; 528 viadev->running = 0; 529 break; 530 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 531 viadev->running = 1; 532 break; 533 default: 534 return -EINVAL; 535 } 536 outb(val, VIADEV_REG(viadev, OFFSET_CONTROL)); 537 if (cmd == SNDRV_PCM_TRIGGER_STOP) 538 snd_via82xx_channel_reset(chip, viadev); 539 return 0; 540 } 541 542 /* 543 * pointer callbacks 544 */ 545 546 /* 547 * calculate the linear position at the given sg-buffer index and the rest count 548 */ 549 550 #define check_invalid_pos(viadev,pos) \ 551 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\ 552 viadev->lastpos < viadev->bufsize2)) 553 554 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip, 555 struct viadev *viadev, 556 unsigned int idx, 557 unsigned int count) 558 { 559 unsigned int size, res; 560 561 size = viadev->idx_table[idx].size; 562 res = viadev->idx_table[idx].offset + size - count; 563 564 /* check the validity of the calculated position */ 565 if (size < count) { 566 dev_err(chip->card->dev, 567 "invalid via82xx_cur_ptr (size = %d, count = %d)\n", 568 (int)size, (int)count); 569 res = viadev->lastpos; 570 } else if (check_invalid_pos(viadev, res)) { 571 #ifdef POINTER_DEBUG 572 dev_dbg(chip->card->dev, 573 "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", 574 idx, viadev->tbl_entries, viadev->lastpos, 575 viadev->bufsize2, viadev->idx_table[idx].offset, 576 viadev->idx_table[idx].size, count); 577 #endif 578 if (count && size < count) { 579 dev_dbg(chip->card->dev, 580 "invalid via82xx_cur_ptr, using last valid pointer\n"); 581 res = viadev->lastpos; 582 } else { 583 if (! count) 584 /* bogus count 0 on the DMA boundary? */ 585 res = viadev->idx_table[idx].offset; 586 else 587 /* count register returns full size 588 * when end of buffer is reached 589 */ 590 res = viadev->idx_table[idx].offset + size; 591 if (check_invalid_pos(viadev, res)) { 592 dev_dbg(chip->card->dev, 593 "invalid via82xx_cur_ptr (2), using last valid pointer\n"); 594 res = viadev->lastpos; 595 } 596 } 597 } 598 viadev->lastpos = res; /* remember the last position */ 599 if (res >= viadev->bufsize) 600 res -= viadev->bufsize; 601 return res; 602 } 603 604 /* 605 * get the current pointer on via686 606 */ 607 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream) 608 { 609 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 610 struct viadev *viadev = substream->runtime->private_data; 611 unsigned int idx, ptr, count, res; 612 613 if (snd_BUG_ON(!viadev->tbl_entries)) 614 return 0; 615 if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE)) 616 return 0; 617 618 spin_lock(&chip->reg_lock); 619 count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff; 620 /* The via686a does not have the current index register, 621 * so we need to calculate the index from CURR_PTR. 622 */ 623 ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR)); 624 if (ptr <= (unsigned int)viadev->table.addr) 625 idx = 0; 626 else /* CURR_PTR holds the address + 8 */ 627 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % 628 viadev->tbl_entries; 629 res = calc_linear_pos(chip, viadev, idx, count); 630 spin_unlock(&chip->reg_lock); 631 632 return bytes_to_frames(substream->runtime, res); 633 } 634 635 /* 636 * hw_params callback: 637 * allocate the buffer and build up the buffer description table 638 */ 639 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream, 640 struct snd_pcm_hw_params *hw_params) 641 { 642 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 643 struct viadev *viadev = substream->runtime->private_data; 644 int err; 645 646 err = build_via_table(viadev, substream, chip->pci, 647 params_periods(hw_params), 648 params_period_bytes(hw_params)); 649 if (err < 0) 650 return err; 651 652 snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params)); 653 snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0); 654 655 return 0; 656 } 657 658 /* 659 * hw_free callback: 660 * clean up the buffer description table and release the buffer 661 */ 662 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream) 663 { 664 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 665 struct viadev *viadev = substream->runtime->private_data; 666 667 clean_via_table(viadev, substream, chip->pci); 668 return 0; 669 } 670 671 672 /* 673 * set up the table pointer 674 */ 675 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev) 676 { 677 snd_via82xx_codec_ready(chip, chip->ac97_secondary); 678 outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR)); 679 udelay(20); 680 snd_via82xx_codec_ready(chip, chip->ac97_secondary); 681 } 682 683 /* 684 * prepare callback for playback and capture 685 */ 686 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream) 687 { 688 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 689 struct viadev *viadev = substream->runtime->private_data; 690 691 snd_via82xx_channel_reset(chip, viadev); 692 /* this must be set after channel_reset */ 693 snd_via82xx_set_table_ptr(chip, viadev); 694 outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG, 695 VIADEV_REG(viadev, OFFSET_TYPE)); 696 return 0; 697 } 698 699 /* 700 * pcm hardware definition, identical for both playback and capture 701 */ 702 static const struct snd_pcm_hardware snd_via82xx_hw = 703 { 704 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 705 SNDRV_PCM_INFO_BLOCK_TRANSFER | 706 SNDRV_PCM_INFO_MMAP_VALID | 707 /* SNDRV_PCM_INFO_RESUME | */ 708 SNDRV_PCM_INFO_PAUSE), 709 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, 710 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT, 711 .rate_min = 8000, 712 .rate_max = 16000, 713 .channels_min = 1, 714 .channels_max = 1, 715 .buffer_bytes_max = 128 * 1024, 716 .period_bytes_min = 32, 717 .period_bytes_max = 128 * 1024, 718 .periods_min = 2, 719 .periods_max = VIA_TABLE_SIZE / 2, 720 .fifo_size = 0, 721 }; 722 723 724 /* 725 * open callback skeleton 726 */ 727 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev, 728 struct snd_pcm_substream *substream) 729 { 730 struct snd_pcm_runtime *runtime = substream->runtime; 731 int err; 732 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 }; 733 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = { 734 .count = ARRAY_SIZE(rates), 735 .list = rates, 736 .mask = 0, 737 }; 738 739 runtime->hw = snd_via82xx_hw; 740 741 if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 742 &hw_constraints_rates)) < 0) 743 return err; 744 745 /* we may remove following constaint when we modify table entries 746 in interrupt */ 747 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) 748 return err; 749 750 runtime->private_data = viadev; 751 viadev->substream = substream; 752 753 return 0; 754 } 755 756 757 /* 758 * open callback for playback 759 */ 760 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream) 761 { 762 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 763 struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number]; 764 765 return snd_via82xx_modem_pcm_open(chip, viadev, substream); 766 } 767 768 /* 769 * open callback for capture 770 */ 771 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream) 772 { 773 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 774 struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device]; 775 776 return snd_via82xx_modem_pcm_open(chip, viadev, substream); 777 } 778 779 /* 780 * close callback 781 */ 782 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream) 783 { 784 struct viadev *viadev = substream->runtime->private_data; 785 786 viadev->substream = NULL; 787 return 0; 788 } 789 790 791 /* via686 playback callbacks */ 792 static const struct snd_pcm_ops snd_via686_playback_ops = { 793 .open = snd_via82xx_playback_open, 794 .close = snd_via82xx_pcm_close, 795 .hw_params = snd_via82xx_hw_params, 796 .hw_free = snd_via82xx_hw_free, 797 .prepare = snd_via82xx_pcm_prepare, 798 .trigger = snd_via82xx_pcm_trigger, 799 .pointer = snd_via686_pcm_pointer, 800 }; 801 802 /* via686 capture callbacks */ 803 static const struct snd_pcm_ops snd_via686_capture_ops = { 804 .open = snd_via82xx_capture_open, 805 .close = snd_via82xx_pcm_close, 806 .hw_params = snd_via82xx_hw_params, 807 .hw_free = snd_via82xx_hw_free, 808 .prepare = snd_via82xx_pcm_prepare, 809 .trigger = snd_via82xx_pcm_trigger, 810 .pointer = snd_via686_pcm_pointer, 811 }; 812 813 814 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset, 815 int direction) 816 { 817 chip->devs[idx].reg_offset = reg_offset; 818 chip->devs[idx].direction = direction; 819 chip->devs[idx].port = chip->port + reg_offset; 820 } 821 822 /* 823 * create a pcm instance for via686a/b 824 */ 825 static int snd_via686_pcm_new(struct via82xx_modem *chip) 826 { 827 struct snd_pcm *pcm; 828 int err; 829 830 chip->playback_devno = 0; 831 chip->capture_devno = 1; 832 chip->num_devs = 2; 833 chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */ 834 835 err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm); 836 if (err < 0) 837 return err; 838 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops); 839 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops); 840 pcm->dev_class = SNDRV_PCM_CLASS_MODEM; 841 pcm->private_data = chip; 842 strcpy(pcm->name, chip->card->shortname); 843 chip->pcms[0] = pcm; 844 init_viadev(chip, 0, VIA_REG_MO_STATUS, 0); 845 init_viadev(chip, 1, VIA_REG_MI_STATUS, 1); 846 847 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG, 848 &chip->pci->dev, 64*1024, 128*1024); 849 return 0; 850 } 851 852 853 /* 854 * Mixer part 855 */ 856 857 858 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus) 859 { 860 struct via82xx_modem *chip = bus->private_data; 861 chip->ac97_bus = NULL; 862 } 863 864 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97) 865 { 866 struct via82xx_modem *chip = ac97->private_data; 867 chip->ac97 = NULL; 868 } 869 870 871 static int snd_via82xx_mixer_new(struct via82xx_modem *chip) 872 { 873 struct snd_ac97_template ac97; 874 int err; 875 static const struct snd_ac97_bus_ops ops = { 876 .write = snd_via82xx_codec_write, 877 .read = snd_via82xx_codec_read, 878 .wait = snd_via82xx_codec_wait, 879 }; 880 881 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0) 882 return err; 883 chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus; 884 chip->ac97_bus->clock = chip->ac97_clock; 885 886 memset(&ac97, 0, sizeof(ac97)); 887 ac97.private_data = chip; 888 ac97.private_free = snd_via82xx_mixer_free_ac97; 889 ac97.pci = chip->pci; 890 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE; 891 ac97.num = chip->ac97_secondary; 892 893 if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0) 894 return err; 895 896 return 0; 897 } 898 899 900 /* 901 * proc interface 902 */ 903 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) 904 { 905 struct via82xx_modem *chip = entry->private_data; 906 int i; 907 908 snd_iprintf(buffer, "%s\n\n", chip->card->longname); 909 for (i = 0; i < 0xa0; i += 4) { 910 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i)); 911 } 912 } 913 914 static void snd_via82xx_proc_init(struct via82xx_modem *chip) 915 { 916 snd_card_ro_proc_new(chip->card, "via82xx", chip, 917 snd_via82xx_proc_read); 918 } 919 920 /* 921 * 922 */ 923 924 static int snd_via82xx_chip_init(struct via82xx_modem *chip) 925 { 926 unsigned int val; 927 unsigned long end_time; 928 unsigned char pval; 929 930 pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval); 931 if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) { 932 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT); 933 udelay(100); 934 } 935 936 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); 937 if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */ 938 /* deassert ACLink reset, force SYNC */ 939 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 940 VIA_ACLINK_CTRL_ENABLE | 941 VIA_ACLINK_CTRL_RESET | 942 VIA_ACLINK_CTRL_SYNC); 943 udelay(100); 944 #if 1 /* FIXME: should we do full reset here for all chip models? */ 945 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00); 946 udelay(100); 947 #else 948 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */ 949 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 950 VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC); 951 udelay(2); 952 #endif 953 /* ACLink on, deassert ACLink reset, VSR, SGD data out */ 954 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); 955 udelay(100); 956 } 957 958 pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval); 959 if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) { 960 /* ACLink on, deassert ACLink reset, VSR, SGD data out */ 961 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); 962 udelay(100); 963 } 964 965 /* wait until codec ready */ 966 end_time = jiffies + msecs_to_jiffies(750); 967 do { 968 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); 969 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */ 970 break; 971 schedule_timeout_uninterruptible(1); 972 } while (time_before(jiffies, end_time)); 973 974 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY) 975 dev_err(chip->card->dev, 976 "AC'97 codec is not ready [0x%x]\n", val); 977 978 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ | 979 VIA_REG_AC97_SECONDARY_VALID | 980 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT)); 981 end_time = jiffies + msecs_to_jiffies(750); 982 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ | 983 VIA_REG_AC97_SECONDARY_VALID | 984 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT)); 985 do { 986 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) { 987 chip->ac97_secondary = 1; 988 goto __ac97_ok2; 989 } 990 schedule_timeout_uninterruptible(1); 991 } while (time_before(jiffies, end_time)); 992 /* This is ok, the most of motherboards have only one codec */ 993 994 __ac97_ok2: 995 996 /* route FM trap to IRQ, disable FM trap */ 997 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0); 998 /* disable all GPI interrupts */ 999 outl(0, VIAREG(chip, GPI_INTR)); 1000 1001 return 0; 1002 } 1003 1004 #ifdef CONFIG_PM_SLEEP 1005 /* 1006 * power management 1007 */ 1008 static int snd_via82xx_suspend(struct device *dev) 1009 { 1010 struct snd_card *card = dev_get_drvdata(dev); 1011 struct via82xx_modem *chip = card->private_data; 1012 int i; 1013 1014 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); 1015 for (i = 0; i < chip->num_devs; i++) 1016 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1017 snd_ac97_suspend(chip->ac97); 1018 return 0; 1019 } 1020 1021 static int snd_via82xx_resume(struct device *dev) 1022 { 1023 struct snd_card *card = dev_get_drvdata(dev); 1024 struct via82xx_modem *chip = card->private_data; 1025 int i; 1026 1027 snd_via82xx_chip_init(chip); 1028 1029 snd_ac97_resume(chip->ac97); 1030 1031 for (i = 0; i < chip->num_devs; i++) 1032 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1033 1034 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 1035 return 0; 1036 } 1037 1038 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume); 1039 #define SND_VIA82XX_PM_OPS &snd_via82xx_pm 1040 #else 1041 #define SND_VIA82XX_PM_OPS NULL 1042 #endif /* CONFIG_PM_SLEEP */ 1043 1044 static int snd_via82xx_free(struct via82xx_modem *chip) 1045 { 1046 unsigned int i; 1047 1048 if (chip->irq < 0) 1049 goto __end_hw; 1050 /* disable interrupts */ 1051 for (i = 0; i < chip->num_devs; i++) 1052 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1053 1054 __end_hw: 1055 if (chip->irq >= 0) 1056 free_irq(chip->irq, chip); 1057 pci_release_regions(chip->pci); 1058 pci_disable_device(chip->pci); 1059 kfree(chip); 1060 return 0; 1061 } 1062 1063 static int snd_via82xx_dev_free(struct snd_device *device) 1064 { 1065 struct via82xx_modem *chip = device->device_data; 1066 return snd_via82xx_free(chip); 1067 } 1068 1069 static int snd_via82xx_create(struct snd_card *card, 1070 struct pci_dev *pci, 1071 int chip_type, 1072 int revision, 1073 unsigned int ac97_clock, 1074 struct via82xx_modem **r_via) 1075 { 1076 struct via82xx_modem *chip; 1077 int err; 1078 static const struct snd_device_ops ops = { 1079 .dev_free = snd_via82xx_dev_free, 1080 }; 1081 1082 if ((err = pci_enable_device(pci)) < 0) 1083 return err; 1084 1085 if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) { 1086 pci_disable_device(pci); 1087 return -ENOMEM; 1088 } 1089 1090 spin_lock_init(&chip->reg_lock); 1091 chip->card = card; 1092 chip->pci = pci; 1093 chip->irq = -1; 1094 1095 if ((err = pci_request_regions(pci, card->driver)) < 0) { 1096 kfree(chip); 1097 pci_disable_device(pci); 1098 return err; 1099 } 1100 chip->port = pci_resource_start(pci, 0); 1101 if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED, 1102 KBUILD_MODNAME, chip)) { 1103 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); 1104 snd_via82xx_free(chip); 1105 return -EBUSY; 1106 } 1107 chip->irq = pci->irq; 1108 card->sync_irq = chip->irq; 1109 if (ac97_clock >= 8000 && ac97_clock <= 48000) 1110 chip->ac97_clock = ac97_clock; 1111 1112 if ((err = snd_via82xx_chip_init(chip)) < 0) { 1113 snd_via82xx_free(chip); 1114 return err; 1115 } 1116 1117 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { 1118 snd_via82xx_free(chip); 1119 return err; 1120 } 1121 1122 /* The 8233 ac97 controller does not implement the master bit 1123 * in the pci command register. IMHO this is a violation of the PCI spec. 1124 * We call pci_set_master here because it does not hurt. */ 1125 pci_set_master(pci); 1126 1127 *r_via = chip; 1128 return 0; 1129 } 1130 1131 1132 static int snd_via82xx_probe(struct pci_dev *pci, 1133 const struct pci_device_id *pci_id) 1134 { 1135 struct snd_card *card; 1136 struct via82xx_modem *chip; 1137 int chip_type = 0, card_type; 1138 unsigned int i; 1139 int err; 1140 1141 err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card); 1142 if (err < 0) 1143 return err; 1144 1145 card_type = pci_id->driver_data; 1146 switch (card_type) { 1147 case TYPE_CARD_VIA82XX_MODEM: 1148 strcpy(card->driver, "VIA82XX-MODEM"); 1149 sprintf(card->shortname, "VIA 82XX modem"); 1150 break; 1151 default: 1152 dev_err(card->dev, "invalid card type %d\n", card_type); 1153 err = -EINVAL; 1154 goto __error; 1155 } 1156 1157 if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision, 1158 ac97_clock, &chip)) < 0) 1159 goto __error; 1160 card->private_data = chip; 1161 if ((err = snd_via82xx_mixer_new(chip)) < 0) 1162 goto __error; 1163 1164 if ((err = snd_via686_pcm_new(chip)) < 0 ) 1165 goto __error; 1166 1167 /* disable interrupts */ 1168 for (i = 0; i < chip->num_devs; i++) 1169 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1170 1171 sprintf(card->longname, "%s at 0x%lx, irq %d", 1172 card->shortname, chip->port, chip->irq); 1173 1174 snd_via82xx_proc_init(chip); 1175 1176 if ((err = snd_card_register(card)) < 0) { 1177 snd_card_free(card); 1178 return err; 1179 } 1180 pci_set_drvdata(pci, card); 1181 return 0; 1182 1183 __error: 1184 snd_card_free(card); 1185 return err; 1186 } 1187 1188 static void snd_via82xx_remove(struct pci_dev *pci) 1189 { 1190 snd_card_free(pci_get_drvdata(pci)); 1191 } 1192 1193 static struct pci_driver via82xx_modem_driver = { 1194 .name = KBUILD_MODNAME, 1195 .id_table = snd_via82xx_modem_ids, 1196 .probe = snd_via82xx_probe, 1197 .remove = snd_via82xx_remove, 1198 .driver = { 1199 .pm = SND_VIA82XX_PM_OPS, 1200 }, 1201 }; 1202 1203 module_pci_driver(via82xx_modem_driver); 1204