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