[ALSA] Sasha Khapyorsky: My email address is changed, there is update.
[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@suse.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 <sound/driver.h>
35 #include <asm/io.h>
36 #include <linux/delay.h>
37 #include <linux/interrupt.h>
38 #include <linux/init.h>
39 #include <linux/pci.h>
40 #include <linux/slab.h>
41 #include <linux/moduleparam.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/info.h>
46 #include <sound/ac97_codec.h>
47 #include <sound/initval.h>
48
49 #if 0
50 #define POINTER_DEBUG
51 #endif
52
53 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
54 MODULE_DESCRIPTION("VIA VT82xx modem");
55 MODULE_LICENSE("GPL");
56 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
57
58 static int index = -2; /* Exclude the first card */
59 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
60 static int ac97_clock = 48000;
61
62 module_param(index, int, 0444);
63 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
64 module_param(id, charp, 0444);
65 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
66 module_param(ac97_clock, int, 0444);
67 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
68
69 /* just for backward compatibility */
70 static int enable;
71 module_param(enable, int, 0444);
72
73
74 /*
75  *  Direct registers
76  */
77
78 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
79 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
80
81 /* common offsets */
82 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
83 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
84 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
85 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
86 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
87 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
88 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
89 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
90 #define   VIA_REG_CTRL_START            0x80    /* WO */
91 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
92 #define   VIA_REG_CTRL_AUTOSTART        0x20
93 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
94 #define   VIA_REG_CTRL_INT_STOP         0x04            
95 #define   VIA_REG_CTRL_INT_EOL          0x02
96 #define   VIA_REG_CTRL_INT_FLAG         0x01
97 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
98 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
99 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
100 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
101 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
102 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
103 #define   VIA_REG_TYPE_INT_LLINE        0x00
104 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
105 #define   VIA_REG_TYPE_INT_LESSONE      0x08
106 #define   VIA_REG_TYPE_INT_MASK         0x0c
107 #define   VIA_REG_TYPE_INT_EOL          0x02
108 #define   VIA_REG_TYPE_INT_FLAG         0x01
109 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
110 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
111 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
112 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
113 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
114
115 #define DEFINE_VIA_REGSET(name,val) \
116 enum {\
117         VIA_REG_##name##_STATUS         = (val),\
118         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
119         VIA_REG_##name##_TYPE           = (val) + 0x02,\
120         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
121         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
122         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
123         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
124 }
125
126 /* modem block */
127 DEFINE_VIA_REGSET(MO, 0x40);
128 DEFINE_VIA_REGSET(MI, 0x50);
129
130 /* AC'97 */
131 #define VIA_REG_AC97                    0x80    /* dword */
132 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
133 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
134 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
135 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
136 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
137 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
138 #define   VIA_REG_AC97_BUSY             (1<<24)
139 #define   VIA_REG_AC97_READ             (1<<23)
140 #define   VIA_REG_AC97_CMD_SHIFT        16
141 #define   VIA_REG_AC97_CMD_MASK         0x7e
142 #define   VIA_REG_AC97_DATA_SHIFT       0
143 #define   VIA_REG_AC97_DATA_MASK        0xffff
144
145 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
146 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
147 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
148 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
149 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
150 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
151 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
152 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
153 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
154 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
155 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
156 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
157 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
158 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
159 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
160 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
161 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
162 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
163 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
164 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
165 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
166
167 #define VIA_REG_GPI_STATUS              0x88
168 #define VIA_REG_GPI_INTR                0x8c
169
170 #define VIA_TBL_BIT_FLAG        0x40000000
171 #define VIA_TBL_BIT_EOL         0x80000000
172
173 /* pci space */
174 #define VIA_ACLINK_STAT         0x40
175 #define  VIA_ACLINK_C11_READY   0x20
176 #define  VIA_ACLINK_C10_READY   0x10
177 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
178 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
179 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
180 #define VIA_ACLINK_CTRL         0x41
181 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
182 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
183 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
184 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
185 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
186 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
187 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
188 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
189 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
190                                  VIA_ACLINK_CTRL_RESET|\
191                                  VIA_ACLINK_CTRL_PCM)
192 #define VIA_FUNC_ENABLE         0x42
193 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
194 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
195 #define  VIA_FUNC_RX2C_WRITE    0x20
196 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
197 #define  VIA_FUNC_ENABLE_GAME   0x08
198 #define  VIA_FUNC_ENABLE_FM     0x04
199 #define  VIA_FUNC_ENABLE_MIDI   0x02
200 #define  VIA_FUNC_ENABLE_SB     0x01
201 #define VIA_PNP_CONTROL         0x43
202 #define VIA_MC97_CTRL           0x44
203 #define  VIA_MC97_CTRL_ENABLE   0x80
204 #define  VIA_MC97_CTRL_SECONDARY 0x40
205 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
206                                  VIA_MC97_CTRL_SECONDARY)
207
208
209 typedef struct _snd_via82xx_modem via82xx_t;
210 typedef struct via_dev viadev_t;
211
212 /*
213  * pcm stream
214  */
215
216 struct snd_via_sg_table {
217         unsigned int offset;
218         unsigned int size;
219 } ;
220
221 #define VIA_TABLE_SIZE  255
222
223 struct via_dev {
224         unsigned int reg_offset;
225         unsigned long port;
226         int direction;  /* playback = 0, capture = 1 */
227         snd_pcm_substream_t *substream;
228         int running;
229         unsigned int tbl_entries; /* # descriptors */
230         struct snd_dma_buffer table;
231         struct snd_via_sg_table *idx_table;
232         /* for recovery from the unexpected pointer */
233         unsigned int lastpos;
234         unsigned int bufsize;
235         unsigned int bufsize2;
236 };
237
238 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
239
240 #define VIA_MAX_MODEM_DEVS      2
241
242 struct _snd_via82xx_modem {
243         int irq;
244
245         unsigned long port;
246
247         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
248
249         struct pci_dev *pci;
250         snd_card_t *card;
251
252         unsigned int num_devs;
253         unsigned int playback_devno, capture_devno;
254         viadev_t devs[VIA_MAX_MODEM_DEVS];
255
256         snd_pcm_t *pcms[2];
257
258         ac97_bus_t *ac97_bus;
259         ac97_t *ac97;
260         unsigned int ac97_clock;
261         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
262
263         spinlock_t reg_lock;
264         snd_info_entry_t *proc_entry;
265 };
266
267 static struct pci_device_id snd_via82xx_modem_ids[] = {
268         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
269         { 0, }
270 };
271
272 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
273
274 /*
275  */
276
277 /*
278  * allocate and initialize the descriptor buffers
279  * periods = number of periods
280  * fragsize = period size in bytes
281  */
282 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
283                            struct pci_dev *pci,
284                            unsigned int periods, unsigned int fragsize)
285 {
286         unsigned int i, idx, ofs, rest;
287         via82xx_t *chip = snd_pcm_substream_chip(substream);
288         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
289
290         if (dev->table.area == NULL) {
291                 /* the start of each lists must be aligned to 8 bytes,
292                  * but the kernel pages are much bigger, so we don't care
293                  */
294                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
295                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
296                                         &dev->table) < 0)
297                         return -ENOMEM;
298         }
299         if (! dev->idx_table) {
300                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
301                 if (! dev->idx_table)
302                         return -ENOMEM;
303         }
304
305         /* fill the entries */
306         idx = 0;
307         ofs = 0;
308         for (i = 0; i < periods; i++) {
309                 rest = fragsize;
310                 /* fill descriptors for a period.
311                  * a period can be split to several descriptors if it's
312                  * over page boundary.
313                  */
314                 do {
315                         unsigned int r;
316                         unsigned int flag;
317
318                         if (idx >= VIA_TABLE_SIZE) {
319                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
320                                 return -EINVAL;
321                         }
322                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
323                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
324                         if (rest < r)
325                                 r = rest;
326                         rest -= r;
327                         if (! rest) {
328                                 if (i == periods - 1)
329                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
330                                 else
331                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
332                         } else
333                                 flag = 0; /* period continues to the next */
334                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
335                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
336                         dev->idx_table[idx].offset = ofs;
337                         dev->idx_table[idx].size = r;
338                         ofs += r;
339                         idx++;
340                 } while (rest > 0);
341         }
342         dev->tbl_entries = idx;
343         dev->bufsize = periods * fragsize;
344         dev->bufsize2 = dev->bufsize / 2;
345         return 0;
346 }
347
348
349 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
350                            struct pci_dev *pci)
351 {
352         if (dev->table.area) {
353                 snd_dma_free_pages(&dev->table);
354                 dev->table.area = NULL;
355         }
356         kfree(dev->idx_table);
357         dev->idx_table = NULL;
358         return 0;
359 }
360
361 /*
362  *  Basic I/O
363  */
364
365 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
366 {
367         return inl(VIAREG(chip, AC97));
368 }
369  
370 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
371 {
372         outl(val, VIAREG(chip, AC97));
373 }
374  
375 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
376 {
377         unsigned int timeout = 1000;    /* 1ms */
378         unsigned int val;
379         
380         while (timeout-- > 0) {
381                 udelay(1);
382                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
383                         return val & 0xffff;
384         }
385         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
386         return -EIO;
387 }
388  
389 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
390 {
391         unsigned int timeout = 1000;    /* 1ms */
392         unsigned int val, val1;
393         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
394                                          VIA_REG_AC97_SECONDARY_VALID;
395         
396         while (timeout-- > 0) {
397                 val = snd_via82xx_codec_xread(chip);
398                 val1 = val & (VIA_REG_AC97_BUSY | stat);
399                 if (val1 == stat)
400                         return val & 0xffff;
401                 udelay(1);
402         }
403         return -EIO;
404 }
405  
406 static void snd_via82xx_codec_wait(ac97_t *ac97)
407 {
408         via82xx_t *chip = ac97->private_data;
409         int err;
410         err = snd_via82xx_codec_ready(chip, ac97->num);
411         /* here we need to wait fairly for long time.. */
412         msleep(500);
413 }
414
415 static void snd_via82xx_codec_write(ac97_t *ac97,
416                                     unsigned short reg,
417                                     unsigned short val)
418 {
419         via82xx_t *chip = ac97->private_data;
420         unsigned int xval;
421         if(reg == AC97_GPIO_STATUS) {
422                 outl(val, VIAREG(chip, GPI_STATUS));
423                 return;
424         }       
425         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
426         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
427         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
428         xval |= val << VIA_REG_AC97_DATA_SHIFT;
429         snd_via82xx_codec_xwrite(chip, xval);
430         snd_via82xx_codec_ready(chip, ac97->num);
431 }
432
433 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
434 {
435         via82xx_t *chip = ac97->private_data;
436         unsigned int xval, val = 0xffff;
437         int again = 0;
438
439         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
440         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
441         xval |= VIA_REG_AC97_READ;
442         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
443         while (1) {
444                 if (again++ > 3) {
445                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
446                         return 0xffff;
447                 }
448                 snd_via82xx_codec_xwrite(chip, xval);
449                 udelay (20);
450                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
451                         udelay(25);
452                         val = snd_via82xx_codec_xread(chip);
453                         break;
454                 }
455         }
456         return val & 0xffff;
457 }
458
459 static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
460 {
461         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
462              VIADEV_REG(viadev, OFFSET_CONTROL));
463         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
464         udelay(50);
465         /* disable interrupts */
466         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
467         /* clear interrupts */
468         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
469         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
470         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
471         viadev->lastpos = 0;
472 }
473
474
475 /*
476  *  Interrupt handler
477  */
478
479 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
480 {
481         via82xx_t *chip = dev_id;
482         unsigned int status;
483         unsigned int i;
484
485         status = inl(VIAREG(chip, SGD_SHADOW));
486         if (! (status & chip->intr_mask)) {
487                 return IRQ_NONE;
488         }
489 // _skip_sgd:
490
491         /* check status for each stream */
492         spin_lock(&chip->reg_lock);
493         for (i = 0; i < chip->num_devs; i++) {
494                 viadev_t *viadev = &chip->devs[i];
495                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
496                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
497                 if (! c_status)
498                         continue;
499                 if (viadev->substream && viadev->running) {
500                         spin_unlock(&chip->reg_lock);
501                         snd_pcm_period_elapsed(viadev->substream);
502                         spin_lock(&chip->reg_lock);
503                 }
504                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
505         }
506         spin_unlock(&chip->reg_lock);
507         return IRQ_HANDLED;
508 }
509
510 /*
511  *  PCM callbacks
512  */
513
514 /*
515  * trigger callback
516  */
517 static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
518 {
519         via82xx_t *chip = snd_pcm_substream_chip(substream);
520         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
521         unsigned char val = 0;
522
523         switch (cmd) {
524         case SNDRV_PCM_TRIGGER_START:
525         case SNDRV_PCM_TRIGGER_SUSPEND:
526                 val |= VIA_REG_CTRL_START;
527                 viadev->running = 1;
528                 break;
529         case SNDRV_PCM_TRIGGER_STOP:
530                 val = VIA_REG_CTRL_TERMINATE;
531                 viadev->running = 0;
532                 break;
533         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
534                 val |= VIA_REG_CTRL_PAUSE;
535                 viadev->running = 0;
536                 break;
537         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
538                 viadev->running = 1;
539                 break;
540         default:
541                 return -EINVAL;
542         }
543         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
544         if (cmd == SNDRV_PCM_TRIGGER_STOP)
545                 snd_via82xx_channel_reset(chip, viadev);
546         return 0;
547 }
548
549 /*
550  * pointer callbacks
551  */
552
553 /*
554  * calculate the linear position at the given sg-buffer index and the rest count
555  */
556
557 #define check_invalid_pos(viadev,pos) \
558         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
559
560 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
561 {
562         unsigned int size, res;
563
564         size = viadev->idx_table[idx].size;
565         res = viadev->idx_table[idx].offset + size - count;
566
567         /* check the validity of the calculated position */
568         if (size < count) {
569                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
570                 res = viadev->lastpos;
571         } else if (check_invalid_pos(viadev, res)) {
572 #ifdef POINTER_DEBUG
573                 printk("fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count);
574 #endif
575                 if (count && size < count) {
576                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
577                         res = viadev->lastpos;
578                 } else {
579                         if (! count)
580                                 /* bogus count 0 on the DMA boundary? */
581                                 res = viadev->idx_table[idx].offset;
582                         else
583                                 /* count register returns full size when end of buffer is reached */
584                                 res = viadev->idx_table[idx].offset + size;
585                         if (check_invalid_pos(viadev, res)) {
586                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
587                                 res = viadev->lastpos;
588                         }
589                 }
590         }
591         viadev->lastpos = res; /* remember the last position */
592         if (res >= viadev->bufsize)
593                 res -= viadev->bufsize;
594         return res;
595 }
596
597 /*
598  * get the current pointer on via686
599  */
600 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
601 {
602         via82xx_t *chip = snd_pcm_substream_chip(substream);
603         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
604         unsigned int idx, ptr, count, res;
605
606         snd_assert(viadev->tbl_entries, return 0);
607         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
608                 return 0;
609
610         spin_lock(&chip->reg_lock);
611         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
612         /* The via686a does not have the current index register,
613          * so we need to calculate the index from CURR_PTR.
614          */
615         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
616         if (ptr <= (unsigned int)viadev->table.addr)
617                 idx = 0;
618         else /* CURR_PTR holds the address + 8 */
619                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
620         res = calc_linear_pos(viadev, idx, count);
621         spin_unlock(&chip->reg_lock);
622
623         return bytes_to_frames(substream->runtime, res);
624 }
625
626 /*
627  * hw_params callback:
628  * allocate the buffer and build up the buffer description table
629  */
630 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
631                                  snd_pcm_hw_params_t * hw_params)
632 {
633         via82xx_t *chip = snd_pcm_substream_chip(substream);
634         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
635         int err;
636
637         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
638         if (err < 0)
639                 return err;
640         err = build_via_table(viadev, substream, chip->pci,
641                               params_periods(hw_params),
642                               params_period_bytes(hw_params));
643         if (err < 0)
644                 return err;
645
646         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
647         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
648
649         return 0;
650 }
651
652 /*
653  * hw_free callback:
654  * clean up the buffer description table and release the buffer
655  */
656 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
657 {
658         via82xx_t *chip = snd_pcm_substream_chip(substream);
659         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
660
661         clean_via_table(viadev, substream, chip->pci);
662         snd_pcm_lib_free_pages(substream);
663         return 0;
664 }
665
666
667 /*
668  * set up the table pointer
669  */
670 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
671 {
672         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
673         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
674         udelay(20);
675         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
676 }
677
678 /*
679  * prepare callback for playback and capture
680  */
681 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
682 {
683         via82xx_t *chip = snd_pcm_substream_chip(substream);
684         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
685
686         snd_via82xx_channel_reset(chip, viadev);
687         /* this must be set after channel_reset */
688         snd_via82xx_set_table_ptr(chip, viadev);
689         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
690              VIADEV_REG(viadev, OFFSET_TYPE));
691         return 0;
692 }
693
694 /*
695  * pcm hardware definition, identical for both playback and capture
696  */
697 static snd_pcm_hardware_t snd_via82xx_hw =
698 {
699         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
700                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
701                                  SNDRV_PCM_INFO_MMAP_VALID |
702                                  /* SNDRV_PCM_INFO_RESUME | */
703                                  SNDRV_PCM_INFO_PAUSE),
704         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
705         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
706         .rate_min =             8000,
707         .rate_max =             16000,
708         .channels_min =         1,
709         .channels_max =         1,
710         .buffer_bytes_max =     128 * 1024,
711         .period_bytes_min =     32,
712         .period_bytes_max =     128 * 1024,
713         .periods_min =          2,
714         .periods_max =          VIA_TABLE_SIZE / 2,
715         .fifo_size =            0,
716 };
717
718
719 /*
720  * open callback skeleton
721  */
722 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
723 {
724         snd_pcm_runtime_t *runtime = substream->runtime;
725         int err;
726         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
727         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
728                 .count = ARRAY_SIZE(rates),
729                 .list = rates,
730                 .mask = 0,
731         };
732
733         runtime->hw = snd_via82xx_hw;
734         
735         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
736                 return err;
737
738         /* we may remove following constaint when we modify table entries
739            in interrupt */
740         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
741                 return err;
742
743         runtime->private_data = viadev;
744         viadev->substream = substream;
745
746         return 0;
747 }
748
749
750 /*
751  * open callback for playback
752  */
753 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
754 {
755         via82xx_t *chip = snd_pcm_substream_chip(substream);
756         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
757
758         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
759 }
760
761 /*
762  * open callback for capture
763  */
764 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
765 {
766         via82xx_t *chip = snd_pcm_substream_chip(substream);
767         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
768
769         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
770 }
771
772 /*
773  * close callback
774  */
775 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
776 {
777         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
778
779         viadev->substream = NULL;
780         return 0;
781 }
782
783
784 /* via686 playback callbacks */
785 static snd_pcm_ops_t snd_via686_playback_ops = {
786         .open =         snd_via82xx_playback_open,
787         .close =        snd_via82xx_pcm_close,
788         .ioctl =        snd_pcm_lib_ioctl,
789         .hw_params =    snd_via82xx_hw_params,
790         .hw_free =      snd_via82xx_hw_free,
791         .prepare =      snd_via82xx_pcm_prepare,
792         .trigger =      snd_via82xx_pcm_trigger,
793         .pointer =      snd_via686_pcm_pointer,
794         .page =         snd_pcm_sgbuf_ops_page,
795 };
796
797 /* via686 capture callbacks */
798 static snd_pcm_ops_t snd_via686_capture_ops = {
799         .open =         snd_via82xx_capture_open,
800         .close =        snd_via82xx_pcm_close,
801         .ioctl =        snd_pcm_lib_ioctl,
802         .hw_params =    snd_via82xx_hw_params,
803         .hw_free =      snd_via82xx_hw_free,
804         .prepare =      snd_via82xx_pcm_prepare,
805         .trigger =      snd_via82xx_pcm_trigger,
806         .pointer =      snd_via686_pcm_pointer,
807         .page =         snd_pcm_sgbuf_ops_page,
808 };
809
810
811 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
812 {
813         chip->devs[idx].reg_offset = reg_offset;
814         chip->devs[idx].direction = direction;
815         chip->devs[idx].port = chip->port + reg_offset;
816 }
817
818 /*
819  * create a pcm instance for via686a/b
820  */
821 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
822 {
823         snd_pcm_t *pcm;
824         int err;
825
826         chip->playback_devno = 0;
827         chip->capture_devno = 1;
828         chip->num_devs = 2;
829         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
830
831         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
832         if (err < 0)
833                 return err;
834         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
835         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
836         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
837         pcm->private_data = chip;
838         strcpy(pcm->name, chip->card->shortname);
839         chip->pcms[0] = pcm;
840         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
841         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
842
843         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
844                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
845                 return err;
846
847         return 0;
848 }
849
850
851 /*
852  *  Mixer part
853  */
854
855
856 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
857 {
858         via82xx_t *chip = bus->private_data;
859         chip->ac97_bus = NULL;
860 }
861
862 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
863 {
864         via82xx_t *chip = ac97->private_data;
865         chip->ac97 = NULL;
866 }
867
868
869 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
870 {
871         ac97_template_t ac97;
872         int err;
873         static ac97_bus_ops_t ops = {
874                 .write = snd_via82xx_codec_write,
875                 .read = snd_via82xx_codec_read,
876                 .wait = snd_via82xx_codec_wait,
877         };
878
879         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
880                 return err;
881         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
882         chip->ac97_bus->clock = chip->ac97_clock;
883
884         memset(&ac97, 0, sizeof(ac97));
885         ac97.private_data = chip;
886         ac97.private_free = snd_via82xx_mixer_free_ac97;
887         ac97.pci = chip->pci;
888         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
889         ac97.num = chip->ac97_secondary;
890
891         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
892                 return err;
893
894         return 0;
895 }
896
897
898 /*
899  * proc interface
900  */
901 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
902 {
903         via82xx_t *chip = entry->private_data;
904         int i;
905         
906         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
907         for (i = 0; i < 0xa0; i += 4) {
908                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
909         }
910 }
911
912 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
913 {
914         snd_info_entry_t *entry;
915
916         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
917                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
918 }
919
920 /*
921  *
922  */
923
924 static int snd_via82xx_chip_init(via82xx_t *chip)
925 {
926         unsigned int val;
927         unsigned long end_time;
928         unsigned char pval;
929
930         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
931         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
932                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
933                 udelay(100);
934         }
935
936         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
937         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
938                 /* deassert ACLink reset, force SYNC */
939                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
940                                       VIA_ACLINK_CTRL_ENABLE |
941                                       VIA_ACLINK_CTRL_RESET |
942                                       VIA_ACLINK_CTRL_SYNC);
943                 udelay(100);
944 #if 1 /* FIXME: should we do full reset here for all chip models? */
945                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
946                 udelay(100);
947 #else
948                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
949                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
950                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
951                 udelay(2);
952 #endif
953                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
954                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
955                 udelay(100);
956         }
957         
958         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
959         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
960                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
961                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
962                 udelay(100);
963         }
964
965         /* wait until codec ready */
966         end_time = jiffies + msecs_to_jiffies(750);
967         do {
968                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
969                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
970                         break;
971                 set_current_state(TASK_UNINTERRUPTIBLE);
972                 schedule_timeout(1);
973         } while (time_before(jiffies, end_time));
974
975         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
976                 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
977
978         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
979                                  VIA_REG_AC97_SECONDARY_VALID |
980                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
981         end_time = jiffies + msecs_to_jiffies(750);
982         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
983                                  VIA_REG_AC97_SECONDARY_VALID |
984                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
985         do {
986                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
987                         chip->ac97_secondary = 1;
988                         goto __ac97_ok2;
989                 }
990                 set_current_state(TASK_INTERRUPTIBLE);
991                 schedule_timeout(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
1006 /*
1007  * power management
1008  */
1009 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1010 {
1011         via82xx_t *chip = card->pm_private_data;
1012         int i;
1013
1014         for (i = 0; i < 2; i++)
1015                 if (chip->pcms[i])
1016                         snd_pcm_suspend_all(chip->pcms[i]);
1017         for (i = 0; i < chip->num_devs; i++)
1018                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1019         synchronize_irq(chip->irq);
1020         snd_ac97_suspend(chip->ac97);
1021         pci_set_power_state(chip->pci, 3);
1022         pci_disable_device(chip->pci);
1023         return 0;
1024 }
1025
1026 static int snd_via82xx_resume(snd_card_t *card)
1027 {
1028         via82xx_t *chip = card->pm_private_data;
1029         int i;
1030
1031         pci_enable_device(chip->pci);
1032         pci_set_power_state(chip->pci, 0);
1033         pci_set_master(chip->pci);
1034
1035         snd_via82xx_chip_init(chip);
1036
1037         snd_ac97_resume(chip->ac97);
1038
1039         for (i = 0; i < chip->num_devs; i++)
1040                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1041
1042         return 0;
1043 }
1044 #endif /* CONFIG_PM */
1045
1046 static int snd_via82xx_free(via82xx_t *chip)
1047 {
1048         unsigned int i;
1049
1050         if (chip->irq < 0)
1051                 goto __end_hw;
1052         /* disable interrupts */
1053         for (i = 0; i < chip->num_devs; i++)
1054                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1055         synchronize_irq(chip->irq);
1056       __end_hw:
1057         if (chip->irq >= 0)
1058                 free_irq(chip->irq, (void *)chip);
1059         pci_release_regions(chip->pci);
1060         pci_disable_device(chip->pci);
1061         kfree(chip);
1062         return 0;
1063 }
1064
1065 static int snd_via82xx_dev_free(snd_device_t *device)
1066 {
1067         via82xx_t *chip = device->device_data;
1068         return snd_via82xx_free(chip);
1069 }
1070
1071 static int __devinit snd_via82xx_create(snd_card_t * card,
1072                                         struct pci_dev *pci,
1073                                         int chip_type,
1074                                         int revision,
1075                                         unsigned int ac97_clock,
1076                                         via82xx_t ** r_via)
1077 {
1078         via82xx_t *chip;
1079         int err;
1080         static snd_device_ops_t ops = {
1081                 .dev_free =     snd_via82xx_dev_free,
1082         };
1083
1084         if ((err = pci_enable_device(pci)) < 0)
1085                 return err;
1086
1087         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1088                 pci_disable_device(pci);
1089                 return -ENOMEM;
1090         }
1091
1092         spin_lock_init(&chip->reg_lock);
1093         chip->card = card;
1094         chip->pci = pci;
1095         chip->irq = -1;
1096
1097         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1098                 kfree(chip);
1099                 pci_disable_device(pci);
1100                 return err;
1101         }
1102         chip->port = pci_resource_start(pci, 0);
1103         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1104                         card->driver, (void *)chip)) {
1105                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1106                 snd_via82xx_free(chip);
1107                 return -EBUSY;
1108         }
1109         chip->irq = pci->irq;
1110         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1111                 chip->ac97_clock = ac97_clock;
1112         synchronize_irq(chip->irq);
1113
1114         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1115                 snd_via82xx_free(chip);
1116                 return err;
1117         }
1118
1119         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1120                 snd_via82xx_free(chip);
1121                 return err;
1122         }
1123
1124         /* The 8233 ac97 controller does not implement the master bit
1125          * in the pci command register. IMHO this is a violation of the PCI spec.
1126          * We call pci_set_master here because it does not hurt. */
1127         pci_set_master(pci);
1128
1129         snd_card_set_dev(card, &pci->dev);
1130
1131         *r_via = chip;
1132         return 0;
1133 }
1134
1135
1136 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1137                                        const struct pci_device_id *pci_id)
1138 {
1139         snd_card_t *card;
1140         via82xx_t *chip;
1141         unsigned char revision;
1142         int chip_type = 0, card_type;
1143         unsigned int i;
1144         int err;
1145
1146         card = snd_card_new(index, id, THIS_MODULE, 0);
1147         if (card == NULL)
1148                 return -ENOMEM;
1149
1150         card_type = pci_id->driver_data;
1151         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1152         switch (card_type) {
1153         case TYPE_CARD_VIA82XX_MODEM:
1154                 strcpy(card->driver, "VIA82XX-MODEM");
1155                 sprintf(card->shortname, "VIA 82XX modem");
1156                 break;
1157         default:
1158                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1159                 err = -EINVAL;
1160                 goto __error;
1161         }
1162                 
1163         if ((err = snd_via82xx_create(card, pci, chip_type, revision,
1164                                       ac97_clock, &chip)) < 0)
1165                 goto __error;
1166         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1167                 goto __error;
1168
1169         if ((err = snd_via686_pcm_new(chip)) < 0 )
1170                 goto __error;
1171
1172         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1173
1174         /* disable interrupts */
1175         for (i = 0; i < chip->num_devs; i++)
1176                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1177
1178         sprintf(card->longname, "%s at 0x%lx, irq %d",
1179                 card->shortname, chip->port, chip->irq);
1180
1181         snd_via82xx_proc_init(chip);
1182
1183         if ((err = snd_card_register(card)) < 0) {
1184                 snd_card_free(card);
1185                 return err;
1186         }
1187         pci_set_drvdata(pci, card);
1188         return 0;
1189
1190  __error:
1191         snd_card_free(card);
1192         return err;
1193 }
1194
1195 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1196 {
1197         snd_card_free(pci_get_drvdata(pci));
1198         pci_set_drvdata(pci, NULL);
1199 }
1200
1201 static struct pci_driver driver = {
1202         .name = "VIA 82xx Modem",
1203         .owner = THIS_MODULE,
1204         .id_table = snd_via82xx_modem_ids,
1205         .probe = snd_via82xx_probe,
1206         .remove = __devexit_p(snd_via82xx_remove),
1207         SND_PCI_PM_CALLBACKS
1208 };
1209
1210 static int __init alsa_card_via82xx_init(void)
1211 {
1212         return pci_register_driver(&driver);
1213 }
1214
1215 static void __exit alsa_card_via82xx_exit(void)
1216 {
1217         pci_unregister_driver(&driver);
1218 }
1219
1220 module_init(alsa_card_via82xx_init)
1221 module_exit(alsa_card_via82xx_exit)