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can: remove some pointless conditionals before kfree_skb()
[linux/fpc-iii.git] / sound / pci / via82xx_modem.c
blob5bd79d2a5a1555d80ba7466eca75baab6804714b
1 /*
2 * ALSA modem driver for VIA VT82xx (South Bridge)
3 *
4 * VT82C686A/B/C, VT8233A/C, VT8235
5 *
6 * Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
7 * Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
8 * 2002 Takashi Iwai <tiwai@suse.de>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26 /*
27 * Changes:
28 *
29 * Sep. 2, 2004 Sasha Khapyorsky <sashak@alsa-project.org>
30 * Modified from original audio driver 'via82xx.c' to support AC97
31 * modems.
32 */
33
34 #include <asm/io.h>
35 #include <linux/delay.h>
36 #include <linux/interrupt.h>
37 #include <linux/init.h>
38 #include <linux/pci.h>
39 #include <linux/slab.h>
40 #include <linux/moduleparam.h>
41 #include <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/info.h>
45 #include <sound/ac97_codec.h>
46 #include <sound/initval.h>
47
48 #if 0
49 #define POINTER_DEBUG
50 #endif
51
52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
53 MODULE_DESCRIPTION("VIA VT82xx modem");
54 MODULE_LICENSE("GPL");
55 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
56
57 static int index = -2; /* Exclude the first card */
58 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
59 static int ac97_clock = 48000;
60
61 module_param(index, int, 0444);
62 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
63 module_param(id, charp, 0444);
64 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
65 module_param(ac97_clock, int, 0444);
66 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
67
68 /* just for backward compatibility */
69 static int enable;
70 module_param(enable, bool, 0444);
71
72
73 /*
74 * Direct registers
75 */
76
77 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
78 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
79
80 /* common offsets */
81 #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */
82 #define VIA_REG_STAT_ACTIVE 0x80 /* RO */
83 #define VIA_REG_STAT_PAUSED 0x40 /* RO */
84 #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */
85 #define VIA_REG_STAT_STOPPED 0x04 /* RWC */
86 #define VIA_REG_STAT_EOL 0x02 /* RWC */
87 #define VIA_REG_STAT_FLAG 0x01 /* RWC */
88 #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */
89 #define VIA_REG_CTRL_START 0x80 /* WO */
90 #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */
91 #define VIA_REG_CTRL_AUTOSTART 0x20
92 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */
93 #define VIA_REG_CTRL_INT_STOP 0x04
94 #define VIA_REG_CTRL_INT_EOL 0x02
95 #define VIA_REG_CTRL_INT_FLAG 0x01
96 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */
97 #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
98 #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */
99 #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */
100 #define VIA_REG_TYPE_16BIT 0x20 /* RW */
101 #define VIA_REG_TYPE_STEREO 0x10 /* RW */
102 #define VIA_REG_TYPE_INT_LLINE 0x00
103 #define VIA_REG_TYPE_INT_LSAMPLE 0x04
104 #define VIA_REG_TYPE_INT_LESSONE 0x08
105 #define VIA_REG_TYPE_INT_MASK 0x0c
106 #define VIA_REG_TYPE_INT_EOL 0x02
107 #define VIA_REG_TYPE_INT_FLAG 0x01
108 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */
109 #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */
110 #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */
111 #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */
112 #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */
113
114 #define DEFINE_VIA_REGSET(name,val) \
115 enum {\
116 VIA_REG_##name##_STATUS = (val),\
117 VIA_REG_##name##_CONTROL = (val) + 0x01,\
118 VIA_REG_##name##_TYPE = (val) + 0x02,\
119 VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\
120 VIA_REG_##name##_CURR_PTR = (val) + 0x04,\
121 VIA_REG_##name##_STOP_IDX = (val) + 0x08,\
122 VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\
123 }
124
125 /* modem block */
126 DEFINE_VIA_REGSET(MO, 0x40);
127 DEFINE_VIA_REGSET(MI, 0x50);
128
129 /* AC'97 */
130 #define VIA_REG_AC97 0x80 /* dword */
131 #define VIA_REG_AC97_CODEC_ID_MASK (3<<30)
132 #define VIA_REG_AC97_CODEC_ID_SHIFT 30
133 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
134 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
135 #define VIA_REG_AC97_SECONDARY_VALID (1<<27)
136 #define VIA_REG_AC97_PRIMARY_VALID (1<<25)
137 #define VIA_REG_AC97_BUSY (1<<24)
138 #define VIA_REG_AC97_READ (1<<23)
139 #define VIA_REG_AC97_CMD_SHIFT 16
140 #define VIA_REG_AC97_CMD_MASK 0x7e
141 #define VIA_REG_AC97_DATA_SHIFT 0
142 #define VIA_REG_AC97_DATA_MASK 0xffff
143
144 #define VIA_REG_SGD_SHADOW 0x84 /* dword */
145 #define VIA_REG_SGD_STAT_PB_FLAG (1<<0)
146 #define VIA_REG_SGD_STAT_CP_FLAG (1<<1)
147 #define VIA_REG_SGD_STAT_FM_FLAG (1<<2)
148 #define VIA_REG_SGD_STAT_PB_EOL (1<<4)
149 #define VIA_REG_SGD_STAT_CP_EOL (1<<5)
150 #define VIA_REG_SGD_STAT_FM_EOL (1<<6)
151 #define VIA_REG_SGD_STAT_PB_STOP (1<<8)
152 #define VIA_REG_SGD_STAT_CP_STOP (1<<9)
153 #define VIA_REG_SGD_STAT_FM_STOP (1<<10)
154 #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12)
155 #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13)
156 #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14)
157 #define VIA_REG_SGD_STAT_MR_FLAG (1<<16)
158 #define VIA_REG_SGD_STAT_MW_FLAG (1<<17)
159 #define VIA_REG_SGD_STAT_MR_EOL (1<<20)
160 #define VIA_REG_SGD_STAT_MW_EOL (1<<21)
161 #define VIA_REG_SGD_STAT_MR_STOP (1<<24)
162 #define VIA_REG_SGD_STAT_MW_STOP (1<<25)
163 #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28)
164 #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29)
165
166 #define VIA_REG_GPI_STATUS 0x88
167 #define VIA_REG_GPI_INTR 0x8c
168
169 #define VIA_TBL_BIT_FLAG 0x40000000
170 #define VIA_TBL_BIT_EOL 0x80000000
171
172 /* pci space */
173 #define VIA_ACLINK_STAT 0x40
174 #define VIA_ACLINK_C11_READY 0x20
175 #define VIA_ACLINK_C10_READY 0x10
176 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */
177 #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */
178 #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */
179 #define VIA_ACLINK_CTRL 0x41
180 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
181 #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */
182 #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */
183 #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */
184 #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */
185 #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */
186 #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */
187 #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */
188 #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\
189 VIA_ACLINK_CTRL_RESET|\
190 VIA_ACLINK_CTRL_PCM)
191 #define VIA_FUNC_ENABLE 0x42
192 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */
193 #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */
194 #define VIA_FUNC_RX2C_WRITE 0x20
195 #define VIA_FUNC_SB_FIFO_EMPTY 0x10
196 #define VIA_FUNC_ENABLE_GAME 0x08
197 #define VIA_FUNC_ENABLE_FM 0x04
198 #define VIA_FUNC_ENABLE_MIDI 0x02
199 #define VIA_FUNC_ENABLE_SB 0x01
200 #define VIA_PNP_CONTROL 0x43
201 #define VIA_MC97_CTRL 0x44
202 #define VIA_MC97_CTRL_ENABLE 0x80
203 #define VIA_MC97_CTRL_SECONDARY 0x40
204 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\
205 VIA_MC97_CTRL_SECONDARY)
206
207
208 /*
209 * pcm stream
210 */
211
212 struct snd_via_sg_table {
213 unsigned int offset;
214 unsigned int size;
215 } ;
216
217 #define VIA_TABLE_SIZE 255
218
219 struct viadev {
220 unsigned int reg_offset;
221 unsigned long port;
222 int direction; /* playback = 0, capture = 1 */
223 struct snd_pcm_substream *substream;
224 int running;
225 unsigned int tbl_entries; /* # descriptors */
226 struct snd_dma_buffer table;
227 struct snd_via_sg_table *idx_table;
228 /* for recovery from the unexpected pointer */
229 unsigned int lastpos;
230 unsigned int bufsize;
231 unsigned int bufsize2;
232 };
233
234 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
235
236 #define VIA_MAX_MODEM_DEVS 2
237
238 struct via82xx_modem {
239 int irq;
240
241 unsigned long port;
242
243 unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
244
245 struct pci_dev *pci;
246 struct snd_card *card;
247
248 unsigned int num_devs;
249 unsigned int playback_devno, capture_devno;
250 struct viadev devs[VIA_MAX_MODEM_DEVS];
251
252 struct snd_pcm *pcms[2];
253
254 struct snd_ac97_bus *ac97_bus;
255 struct snd_ac97 *ac97;
256 unsigned int ac97_clock;
257 unsigned int ac97_secondary; /* secondary AC'97 codec is present */
258
259 spinlock_t reg_lock;
260 struct snd_info_entry *proc_entry;
261 };
262
263 static struct pci_device_id snd_via82xx_modem_ids[] = {
264 { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
265 { 0, }
266 };
267
268 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
269
270 /*
271 */
272
273 /*
274 * allocate and initialize the descriptor buffers
275 * periods = number of periods
276 * fragsize = period size in bytes
277 */
278 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
279 struct pci_dev *pci,
280 unsigned int periods, unsigned int fragsize)
281 {
282 unsigned int i, idx, ofs, rest;
283 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
284
285 if (dev->table.area == NULL) {
286 /* the start of each lists must be aligned to 8 bytes,
287 * but the kernel pages are much bigger, so we don't care
288 */
289 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
290 PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
291 &dev->table) < 0)
292 return -ENOMEM;
293 }
294 if (! dev->idx_table) {
295 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
296 if (! dev->idx_table)
297 return -ENOMEM;
298 }
299
300 /* fill the entries */
301 idx = 0;
302 ofs = 0;
303 for (i = 0; i < periods; i++) {
304 rest = fragsize;
305 /* fill descriptors for a period.
306 * a period can be split to several descriptors if it's
307 * over page boundary.
308 */
309 do {
310 unsigned int r;
311 unsigned int flag;
312 unsigned int addr;
313
314 if (idx >= VIA_TABLE_SIZE) {
315 snd_printk(KERN_ERR "via82xx: too much table size!\n");
316 return -EINVAL;
317 }
318 addr = snd_pcm_sgbuf_get_addr(substream, ofs);
319 ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
320 r = PAGE_SIZE - (ofs % PAGE_SIZE);
321 if (rest < r)
322 r = rest;
323 rest -= r;
324 if (! rest) {
325 if (i == periods - 1)
326 flag = VIA_TBL_BIT_EOL; /* buffer boundary */
327 else
328 flag = VIA_TBL_BIT_FLAG; /* period boundary */
329 } else
330 flag = 0; /* period continues to the next */
331 // printk("via: tbl %d: at %d size %d (rest %d)\n", idx, ofs, r, rest);
332 ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
333 dev->idx_table[idx].offset = ofs;
334 dev->idx_table[idx].size = r;
335 ofs += r;
336 idx++;
337 } while (rest > 0);
338 }
339 dev->tbl_entries = idx;
340 dev->bufsize = periods * fragsize;
341 dev->bufsize2 = dev->bufsize / 2;
342 return 0;
343 }
344
345
346 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
347 struct pci_dev *pci)
348 {
349 if (dev->table.area) {
350 snd_dma_free_pages(&dev->table);
351 dev->table.area = NULL;
352 }
353 kfree(dev->idx_table);
354 dev->idx_table = NULL;
355 return 0;
356 }
357
358 /*
359 * Basic I/O
360 */
361
362 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
363 {
364 return inl(VIAREG(chip, AC97));
365 }
366
367 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
368 {
369 outl(val, VIAREG(chip, AC97));
370 }
371
372 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
373 {
374 unsigned int timeout = 1000; /* 1ms */
375 unsigned int val;
376
377 while (timeout-- > 0) {
378 udelay(1);
379 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
380 return val & 0xffff;
381 }
382 snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n",
383 secondary, snd_via82xx_codec_xread(chip));
384 return -EIO;
385 }
386
387 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
388 {
389 unsigned int timeout = 1000; /* 1ms */
390 unsigned int val, val1;
391 unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
392 VIA_REG_AC97_SECONDARY_VALID;
393
394 while (timeout-- > 0) {
395 val = snd_via82xx_codec_xread(chip);
396 val1 = val & (VIA_REG_AC97_BUSY | stat);
397 if (val1 == stat)
398 return val & 0xffff;
399 udelay(1);
400 }
401 return -EIO;
402 }
403
404 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
405 {
406 struct via82xx_modem *chip = ac97->private_data;
407 int err;
408 err = snd_via82xx_codec_ready(chip, ac97->num);
409 /* here we need to wait fairly for long time.. */
410 msleep(500);
411 }
412
413 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
414 unsigned short reg,
415 unsigned short val)
416 {
417 struct via82xx_modem *chip = ac97->private_data;
418 unsigned int xval;
419 if(reg == AC97_GPIO_STATUS) {
420 outl(val, VIAREG(chip, GPI_STATUS));
421 return;
422 }
423 xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
424 xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
425 xval |= reg << VIA_REG_AC97_CMD_SHIFT;
426 xval |= val << VIA_REG_AC97_DATA_SHIFT;
427 snd_via82xx_codec_xwrite(chip, xval);
428 snd_via82xx_codec_ready(chip, ac97->num);
429 }
430
431 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
432 {
433 struct via82xx_modem *chip = ac97->private_data;
434 unsigned int xval, val = 0xffff;
435 int again = 0;
436
437 xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
438 xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
439 xval |= VIA_REG_AC97_READ;
440 xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
441 while (1) {
442 if (again++ > 3) {
443 snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n",
444 ac97->num, snd_via82xx_codec_xread(chip));
445 return 0xffff;
446 }
447 snd_via82xx_codec_xwrite(chip, xval);
448 udelay (20);
449 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
450 udelay(25);
451 val = snd_via82xx_codec_xread(chip);
452 break;
453 }
454 }
455 return val & 0xffff;
456 }
457
458 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
459 {
460 outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
461 VIADEV_REG(viadev, OFFSET_CONTROL));
462 inb(VIADEV_REG(viadev, OFFSET_CONTROL));
463 udelay(50);
464 /* disable interrupts */
465 outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
466 /* clear interrupts */
467 outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
468 outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
469 // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
470 viadev->lastpos = 0;
471 }
472
473
474 /*
475 * Interrupt handler
476 */
477
478 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
479 {
480 struct via82xx_modem *chip = dev_id;
481 unsigned int status;
482 unsigned int i;
483
484 status = inl(VIAREG(chip, SGD_SHADOW));
485 if (! (status & chip->intr_mask)) {
486 return IRQ_NONE;
487 }
488 // _skip_sgd:
489
490 /* check status for each stream */
491 spin_lock(&chip->reg_lock);
492 for (i = 0; i < chip->num_devs; i++) {
493 struct viadev *viadev = &chip->devs[i];
494 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
495 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
496 if (! c_status)
497 continue;
498 if (viadev->substream && viadev->running) {
499 spin_unlock(&chip->reg_lock);
500 snd_pcm_period_elapsed(viadev->substream);
501 spin_lock(&chip->reg_lock);
502 }
503 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
504 }
505 spin_unlock(&chip->reg_lock);
506 return IRQ_HANDLED;
507 }
508
509 /*
510 * PCM callbacks
511 */
512
513 /*
514 * trigger callback
515 */
516 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
517 {
518 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
519 struct viadev *viadev = substream->runtime->private_data;
520 unsigned char val = 0;
521
522 switch (cmd) {
523 case SNDRV_PCM_TRIGGER_START:
524 case SNDRV_PCM_TRIGGER_SUSPEND:
525 val |= VIA_REG_CTRL_START;
526 viadev->running = 1;
527 break;
528 case SNDRV_PCM_TRIGGER_STOP:
529 val = VIA_REG_CTRL_TERMINATE;
530 viadev->running = 0;
531 break;
532 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
533 val |= VIA_REG_CTRL_PAUSE;
534 viadev->running = 0;
535 break;
536 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
537 viadev->running = 1;
538 break;
539 default:
540 return -EINVAL;
541 }
542 outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
543 if (cmd == SNDRV_PCM_TRIGGER_STOP)
544 snd_via82xx_channel_reset(chip, viadev);
545 return 0;
546 }
547
548 /*
549 * pointer callbacks
550 */
551
552 /*
553 * calculate the linear position at the given sg-buffer index and the rest count
554 */
555
556 #define check_invalid_pos(viadev,pos) \
557 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
558 viadev->lastpos < viadev->bufsize2))
559
560 static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx,
561 unsigned int count)
562 {
563 unsigned int size, res;
564
565 size = viadev->idx_table[idx].size;
566 res = viadev->idx_table[idx].offset + size - count;
567
568 /* check the validity of the calculated position */
569 if (size < count) {
570 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
571 (int)size, (int)count);
572 res = viadev->lastpos;
573 } else if (check_invalid_pos(viadev, res)) {
574 #ifdef POINTER_DEBUG
575 printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, "
576 "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
577 "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos,
578 viadev->bufsize2, viadev->idx_table[idx].offset,
579 viadev->idx_table[idx].size, count);
580 #endif
581 if (count && size < count) {
582 snd_printd(KERN_ERR "invalid via82xx_cur_ptr, "
583 "using last valid pointer\n");
584 res = viadev->lastpos;
585 } else {
586 if (! count)
587 /* bogus count 0 on the DMA boundary? */
588 res = viadev->idx_table[idx].offset;
589 else
590 /* count register returns full size
591 * when end of buffer is reached
592 */
593 res = viadev->idx_table[idx].offset + size;
594 if (check_invalid_pos(viadev, res)) {
595 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), "
596 "using last valid pointer\n");
597 res = viadev->lastpos;
598 }
599 }
600 }
601 viadev->lastpos = res; /* remember the last position */
602 if (res >= viadev->bufsize)
603 res -= viadev->bufsize;
604 return res;
605 }
606
607 /*
608 * get the current pointer on via686
609 */
610 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
611 {
612 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
613 struct viadev *viadev = substream->runtime->private_data;
614 unsigned int idx, ptr, count, res;
615
616 if (snd_BUG_ON(!viadev->tbl_entries))
617 return 0;
618 if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
619 return 0;
620
621 spin_lock(&chip->reg_lock);
622 count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
623 /* The via686a does not have the current index register,
624 * so we need to calculate the index from CURR_PTR.
625 */
626 ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
627 if (ptr <= (unsigned int)viadev->table.addr)
628 idx = 0;
629 else /* CURR_PTR holds the address + 8 */
630 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
631 viadev->tbl_entries;
632 res = calc_linear_pos(viadev, idx, count);
633 spin_unlock(&chip->reg_lock);
634
635 return bytes_to_frames(substream->runtime, res);
636 }
637
638 /*
639 * hw_params callback:
640 * allocate the buffer and build up the buffer description table
641 */
642 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
643 struct snd_pcm_hw_params *hw_params)
644 {
645 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
646 struct viadev *viadev = substream->runtime->private_data;
647 int err;
648
649 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
650 if (err < 0)
651 return err;
652 err = build_via_table(viadev, substream, chip->pci,
653 params_periods(hw_params),
654 params_period_bytes(hw_params));
655 if (err < 0)
656 return err;
657
658 snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
659 snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
660
661 return 0;
662 }
663
664 /*
665 * hw_free callback:
666 * clean up the buffer description table and release the buffer
667 */
668 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
669 {
670 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
671 struct viadev *viadev = substream->runtime->private_data;
672
673 clean_via_table(viadev, substream, chip->pci);
674 snd_pcm_lib_free_pages(substream);
675 return 0;
676 }
677
678
679 /*
680 * set up the table pointer
681 */
682 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
683 {
684 snd_via82xx_codec_ready(chip, chip->ac97_secondary);
685 outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
686 udelay(20);
687 snd_via82xx_codec_ready(chip, chip->ac97_secondary);
688 }
689
690 /*
691 * prepare callback for playback and capture
692 */
693 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
694 {
695 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
696 struct viadev *viadev = substream->runtime->private_data;
697
698 snd_via82xx_channel_reset(chip, viadev);
699 /* this must be set after channel_reset */
700 snd_via82xx_set_table_ptr(chip, viadev);
701 outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
702 VIADEV_REG(viadev, OFFSET_TYPE));
703 return 0;
704 }
705
706 /*
707 * pcm hardware definition, identical for both playback and capture
708 */
709 static struct snd_pcm_hardware snd_via82xx_hw =
710 {
711 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
712 SNDRV_PCM_INFO_BLOCK_TRANSFER |
713 SNDRV_PCM_INFO_MMAP_VALID |
714 /* SNDRV_PCM_INFO_RESUME | */
715 SNDRV_PCM_INFO_PAUSE),
716 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
717 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
718 .rate_min = 8000,
719 .rate_max = 16000,
720 .channels_min = 1,
721 .channels_max = 1,
722 .buffer_bytes_max = 128 * 1024,
723 .period_bytes_min = 32,
724 .period_bytes_max = 128 * 1024,
725 .periods_min = 2,
726 .periods_max = VIA_TABLE_SIZE / 2,
727 .fifo_size = 0,
728 };
729
730
731 /*
732 * open callback skeleton
733 */
734 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
735 struct snd_pcm_substream *substream)
736 {
737 struct snd_pcm_runtime *runtime = substream->runtime;
738 int err;
739 static unsigned int rates[] = { 8000, 9600, 12000, 16000 };
740 static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
741 .count = ARRAY_SIZE(rates),
742 .list = rates,
743 .mask = 0,
744 };
745
746 runtime->hw = snd_via82xx_hw;
747
748 if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
749 &hw_constraints_rates)) < 0)
750 return err;
751
752 /* we may remove following constaint when we modify table entries
753 in interrupt */
754 if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
755 return err;
756
757 runtime->private_data = viadev;
758 viadev->substream = substream;
759
760 return 0;
761 }
762
763
764 /*
765 * open callback for playback
766 */
767 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
768 {
769 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
770 struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
771
772 return snd_via82xx_modem_pcm_open(chip, viadev, substream);
773 }
774
775 /*
776 * open callback for capture
777 */
778 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
779 {
780 struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
781 struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
782
783 return snd_via82xx_modem_pcm_open(chip, viadev, substream);
784 }
785
786 /*
787 * close callback
788 */
789 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
790 {
791 struct viadev *viadev = substream->runtime->private_data;
792
793 viadev->substream = NULL;
794 return 0;
795 }
796
797
798 /* via686 playback callbacks */
799 static struct snd_pcm_ops snd_via686_playback_ops = {
800 .open = snd_via82xx_playback_open,
801 .close = snd_via82xx_pcm_close,
802 .ioctl = snd_pcm_lib_ioctl,
803 .hw_params = snd_via82xx_hw_params,
804 .hw_free = snd_via82xx_hw_free,
805 .prepare = snd_via82xx_pcm_prepare,
806 .trigger = snd_via82xx_pcm_trigger,
807 .pointer = snd_via686_pcm_pointer,
808 .page = snd_pcm_sgbuf_ops_page,
809 };
810
811 /* via686 capture callbacks */
812 static struct snd_pcm_ops snd_via686_capture_ops = {
813 .open = snd_via82xx_capture_open,
814 .close = snd_via82xx_pcm_close,
815 .ioctl = snd_pcm_lib_ioctl,
816 .hw_params = snd_via82xx_hw_params,
817 .hw_free = snd_via82xx_hw_free,
818 .prepare = snd_via82xx_pcm_prepare,
819 .trigger = snd_via82xx_pcm_trigger,
820 .pointer = snd_via686_pcm_pointer,
821 .page = snd_pcm_sgbuf_ops_page,
822 };
823
824
825 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
826 int direction)
827 {
828 chip->devs[idx].reg_offset = reg_offset;
829 chip->devs[idx].direction = direction;
830 chip->devs[idx].port = chip->port + reg_offset;
831 }
832
833 /*
834 * create a pcm instance for via686a/b
835 */
836 static int __devinit snd_via686_pcm_new(struct via82xx_modem *chip)
837 {
838 struct snd_pcm *pcm;
839 int err;
840
841 chip->playback_devno = 0;
842 chip->capture_devno = 1;
843 chip->num_devs = 2;
844 chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
845
846 err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
847 if (err < 0)
848 return err;
849 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
850 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
851 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
852 pcm->private_data = chip;
853 strcpy(pcm->name, chip->card->shortname);
854 chip->pcms[0] = pcm;
855 init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
856 init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
857
858 if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
859 snd_dma_pci_data(chip->pci),
860 64*1024, 128*1024)) < 0)
861 return err;
862
863 return 0;
864 }
865
866
867 /*
868 * Mixer part
869 */
870
871
872 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
873 {
874 struct via82xx_modem *chip = bus->private_data;
875 chip->ac97_bus = NULL;
876 }
877
878 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
879 {
880 struct via82xx_modem *chip = ac97->private_data;
881 chip->ac97 = NULL;
882 }
883
884
885 static int __devinit snd_via82xx_mixer_new(struct via82xx_modem *chip)
886 {
887 struct snd_ac97_template ac97;
888 int err;
889 static struct snd_ac97_bus_ops ops = {
890 .write = snd_via82xx_codec_write,
891 .read = snd_via82xx_codec_read,
892 .wait = snd_via82xx_codec_wait,
893 };
894
895 if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
896 return err;
897 chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
898 chip->ac97_bus->clock = chip->ac97_clock;
899
900 memset(&ac97, 0, sizeof(ac97));
901 ac97.private_data = chip;
902 ac97.private_free = snd_via82xx_mixer_free_ac97;
903 ac97.pci = chip->pci;
904 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
905 ac97.num = chip->ac97_secondary;
906
907 if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
908 return err;
909
910 return 0;
911 }
912
913
914 /*
915 * proc interface
916 */
917 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
918 {
919 struct via82xx_modem *chip = entry->private_data;
920 int i;
921
922 snd_iprintf(buffer, "%s\n\n", chip->card->longname);
923 for (i = 0; i < 0xa0; i += 4) {
924 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
925 }
926 }
927
928 static void __devinit snd_via82xx_proc_init(struct via82xx_modem *chip)
929 {
930 struct snd_info_entry *entry;
931
932 if (! snd_card_proc_new(chip->card, "via82xx", &entry))
933 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
934 }
935
936 /*
937 *
938 */
939
940 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
941 {
942 unsigned int val;
943 unsigned long end_time;
944 unsigned char pval;
945
946 pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
947 if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
948 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
949 udelay(100);
950 }
951
952 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
953 if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
954 /* deassert ACLink reset, force SYNC */
955 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
956 VIA_ACLINK_CTRL_ENABLE |
957 VIA_ACLINK_CTRL_RESET |
958 VIA_ACLINK_CTRL_SYNC);
959 udelay(100);
960 #if 1 /* FIXME: should we do full reset here for all chip models? */
961 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
962 udelay(100);
963 #else
964 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
965 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
966 VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
967 udelay(2);
968 #endif
969 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
970 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
971 udelay(100);
972 }
973
974 pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
975 if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
976 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
977 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
978 udelay(100);
979 }
980
981 /* wait until codec ready */
982 end_time = jiffies + msecs_to_jiffies(750);
983 do {
984 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
985 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
986 break;
987 schedule_timeout_uninterruptible(1);
988 } while (time_before(jiffies, end_time));
989
990 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
991 snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
992
993 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
994 VIA_REG_AC97_SECONDARY_VALID |
995 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
996 end_time = jiffies + msecs_to_jiffies(750);
997 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
998 VIA_REG_AC97_SECONDARY_VALID |
999 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1000 do {
1001 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1002 chip->ac97_secondary = 1;
1003 goto __ac97_ok2;
1004 }
1005 schedule_timeout_uninterruptible(1);
1006 } while (time_before(jiffies, end_time));
1007 /* This is ok, the most of motherboards have only one codec */
1008
1009 __ac97_ok2:
1010
1011 /* route FM trap to IRQ, disable FM trap */
1012 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1013 /* disable all GPI interrupts */
1014 outl(0, VIAREG(chip, GPI_INTR));
1015
1016 return 0;
1017 }
1018
1019 #ifdef CONFIG_PM
1020 /*
1021 * power management
1022 */
1023 static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state)
1024 {
1025 struct snd_card *card = pci_get_drvdata(pci);
1026 struct via82xx_modem *chip = card->private_data;
1027 int i;
1028
1029 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1030 for (i = 0; i < 2; i++)
1031 snd_pcm_suspend_all(chip->pcms[i]);
1032 for (i = 0; i < chip->num_devs; i++)
1033 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1034 synchronize_irq(chip->irq);
1035 snd_ac97_suspend(chip->ac97);
1036
1037 pci_disable_device(pci);
1038 pci_save_state(pci);
1039 pci_set_power_state(pci, pci_choose_state(pci, state));
1040 return 0;
1041 }
1042
1043 static int snd_via82xx_resume(struct pci_dev *pci)
1044 {
1045 struct snd_card *card = pci_get_drvdata(pci);
1046 struct via82xx_modem *chip = card->private_data;
1047 int i;
1048
1049 pci_set_power_state(pci, PCI_D0);
1050 pci_restore_state(pci);
1051 if (pci_enable_device(pci) < 0) {
1052 printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1053 "disabling device\n");
1054 snd_card_disconnect(card);
1055 return -EIO;
1056 }
1057 pci_set_master(pci);
1058
1059 snd_via82xx_chip_init(chip);
1060
1061 snd_ac97_resume(chip->ac97);
1062
1063 for (i = 0; i < chip->num_devs; i++)
1064 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1065
1066 snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1067 return 0;
1068 }
1069 #endif /* CONFIG_PM */
1070
1071 static int snd_via82xx_free(struct via82xx_modem *chip)
1072 {
1073 unsigned int i;
1074
1075 if (chip->irq < 0)
1076 goto __end_hw;
1077 /* disable interrupts */
1078 for (i = 0; i < chip->num_devs; i++)
1079 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1080
1081 __end_hw:
1082 if (chip->irq >= 0)
1083 free_irq(chip->irq, chip);
1084 pci_release_regions(chip->pci);
1085 pci_disable_device(chip->pci);
1086 kfree(chip);
1087 return 0;
1088 }
1089
1090 static int snd_via82xx_dev_free(struct snd_device *device)
1091 {
1092 struct via82xx_modem *chip = device->device_data;
1093 return snd_via82xx_free(chip);
1094 }
1095
1096 static int __devinit snd_via82xx_create(struct snd_card *card,
1097 struct pci_dev *pci,
1098 int chip_type,
1099 int revision,
1100 unsigned int ac97_clock,
1101 struct via82xx_modem ** r_via)
1102 {
1103 struct via82xx_modem *chip;
1104 int err;
1105 static struct snd_device_ops ops = {
1106 .dev_free = snd_via82xx_dev_free,
1107 };
1108
1109 if ((err = pci_enable_device(pci)) < 0)
1110 return err;
1111
1112 if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1113 pci_disable_device(pci);
1114 return -ENOMEM;
1115 }
1116
1117 spin_lock_init(&chip->reg_lock);
1118 chip->card = card;
1119 chip->pci = pci;
1120 chip->irq = -1;
1121
1122 if ((err = pci_request_regions(pci, card->driver)) < 0) {
1123 kfree(chip);
1124 pci_disable_device(pci);
1125 return err;
1126 }
1127 chip->port = pci_resource_start(pci, 0);
1128 if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1129 card->driver, chip)) {
1130 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1131 snd_via82xx_free(chip);
1132 return -EBUSY;
1133 }
1134 chip->irq = pci->irq;
1135 if (ac97_clock >= 8000 && ac97_clock <= 48000)
1136 chip->ac97_clock = ac97_clock;
1137 synchronize_irq(chip->irq);
1138
1139 if ((err = snd_via82xx_chip_init(chip)) < 0) {
1140 snd_via82xx_free(chip);
1141 return err;
1142 }
1143
1144 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1145 snd_via82xx_free(chip);
1146 return err;
1147 }
1148
1149 /* The 8233 ac97 controller does not implement the master bit
1150 * in the pci command register. IMHO this is a violation of the PCI spec.
1151 * We call pci_set_master here because it does not hurt. */
1152 pci_set_master(pci);
1153
1154 snd_card_set_dev(card, &pci->dev);
1155
1156 *r_via = chip;
1157 return 0;
1158 }
1159
1160
1161 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1162 const struct pci_device_id *pci_id)
1163 {
1164 struct snd_card *card;
1165 struct via82xx_modem *chip;
1166 int chip_type = 0, card_type;
1167 unsigned int i;
1168 int err;
1169
1170 card = snd_card_new(index, id, THIS_MODULE, 0);
1171 if (card == NULL)
1172 return -ENOMEM;
1173
1174 card_type = pci_id->driver_data;
1175 switch (card_type) {
1176 case TYPE_CARD_VIA82XX_MODEM:
1177 strcpy(card->driver, "VIA82XX-MODEM");
1178 sprintf(card->shortname, "VIA 82XX modem");
1179 break;
1180 default:
1181 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1182 err = -EINVAL;
1183 goto __error;
1184 }
1185
1186 if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1187 ac97_clock, &chip)) < 0)
1188 goto __error;
1189 card->private_data = chip;
1190 if ((err = snd_via82xx_mixer_new(chip)) < 0)
1191 goto __error;
1192
1193 if ((err = snd_via686_pcm_new(chip)) < 0 )
1194 goto __error;
1195
1196 /* disable interrupts */
1197 for (i = 0; i < chip->num_devs; i++)
1198 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1199
1200 sprintf(card->longname, "%s at 0x%lx, irq %d",
1201 card->shortname, chip->port, chip->irq);
1202
1203 snd_via82xx_proc_init(chip);
1204
1205 if ((err = snd_card_register(card)) < 0) {
1206 snd_card_free(card);
1207 return err;
1208 }
1209 pci_set_drvdata(pci, card);
1210 return 0;
1211
1212 __error:
1213 snd_card_free(card);
1214 return err;
1215 }
1216
1217 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1218 {
1219 snd_card_free(pci_get_drvdata(pci));
1220 pci_set_drvdata(pci, NULL);
1221 }
1222
1223 static struct pci_driver driver = {
1224 .name = "VIA 82xx Modem",
1225 .id_table = snd_via82xx_modem_ids,
1226 .probe = snd_via82xx_probe,
1227 .remove = __devexit_p(snd_via82xx_remove),
1228 #ifdef CONFIG_PM
1229 .suspend = snd_via82xx_suspend,
1230 .resume = snd_via82xx_resume,
1231 #endif
1232 };
1233
1234 static int __init alsa_card_via82xx_init(void)
1235 {
1236 return pci_register_driver(&driver);
1237 }
1238
1239 static void __exit alsa_card_via82xx_exit(void)
1240 {
1241 pci_unregister_driver(&driver);
1242 }
1243
1244 module_init(alsa_card_via82xx_init)
1245 module_exit(alsa_card_via82xx_exit)
Linux with added FPC-III support