c086b762c150a30cfa651c7ff5b7805ad2c461da
[linux-2.6.git] / sound / pci / via82xx_modem.c
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         err = snd_card_create(index, id, THIS_MODULE, 0, &card);
1171         if (err < 0)
1172                 return err;
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)