[ALSA] sound/pci: fix-up sleeping paths
[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@smlink.com>
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[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
59 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
60 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
61 static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 48000};
62
63 module_param_array(index, int, NULL, 0444);
64 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
65 module_param_array(id, charp, NULL, 0444);
66 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
67 module_param_array(enable, bool, NULL, 0444);
68 MODULE_PARM_DESC(enable, "Enable modem part of VIA 82xx bridge.");
69 module_param_array(ac97_clock, int, NULL, 0444);
70 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
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 typedef struct _snd_via82xx_modem via82xx_t;
209 typedef struct via_dev viadev_t;
210
211 /*
212  * pcm stream
213  */
214
215 struct snd_via_sg_table {
216         unsigned int offset;
217         unsigned int size;
218 } ;
219
220 #define VIA_TABLE_SIZE  255
221
222 struct via_dev {
223         unsigned int reg_offset;
224         unsigned long port;
225         int direction;  /* playback = 0, capture = 1 */
226         snd_pcm_substream_t *substream;
227         int running;
228         unsigned int tbl_entries; /* # descriptors */
229         struct snd_dma_buffer table;
230         struct snd_via_sg_table *idx_table;
231         /* for recovery from the unexpected pointer */
232         unsigned int lastpos;
233         unsigned int bufsize;
234         unsigned int bufsize2;
235 };
236
237 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
238
239 #define VIA_MAX_MODEM_DEVS      2
240
241 struct _snd_via82xx_modem {
242         int irq;
243
244         unsigned long port;
245
246         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
247
248         struct pci_dev *pci;
249         snd_card_t *card;
250
251         unsigned int num_devs;
252         unsigned int playback_devno, capture_devno;
253         viadev_t devs[VIA_MAX_MODEM_DEVS];
254
255         snd_pcm_t *pcms[2];
256
257         ac97_bus_t *ac97_bus;
258         ac97_t *ac97;
259         unsigned int ac97_clock;
260         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
261
262         spinlock_t reg_lock;
263         snd_info_entry_t *proc_entry;
264 };
265
266 static struct pci_device_id snd_via82xx_modem_ids[] = {
267         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
268         { 0, }
269 };
270
271 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
272
273 /*
274  */
275
276 /*
277  * allocate and initialize the descriptor buffers
278  * periods = number of periods
279  * fragsize = period size in bytes
280  */
281 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
282                            struct pci_dev *pci,
283                            unsigned int periods, unsigned int fragsize)
284 {
285         unsigned int i, idx, ofs, rest;
286         via82xx_t *chip = snd_pcm_substream_chip(substream);
287         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
288
289         if (dev->table.area == NULL) {
290                 /* the start of each lists must be aligned to 8 bytes,
291                  * but the kernel pages are much bigger, so we don't care
292                  */
293                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
294                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
295                                         &dev->table) < 0)
296                         return -ENOMEM;
297         }
298         if (! dev->idx_table) {
299                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
300                 if (! dev->idx_table)
301                         return -ENOMEM;
302         }
303
304         /* fill the entries */
305         idx = 0;
306         ofs = 0;
307         for (i = 0; i < periods; i++) {
308                 rest = fragsize;
309                 /* fill descriptors for a period.
310                  * a period can be split to several descriptors if it's
311                  * over page boundary.
312                  */
313                 do {
314                         unsigned int r;
315                         unsigned int flag;
316
317                         if (idx >= VIA_TABLE_SIZE) {
318                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
319                                 return -EINVAL;
320                         }
321                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
322                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
323                         if (rest < r)
324                                 r = rest;
325                         rest -= r;
326                         if (! rest) {
327                                 if (i == periods - 1)
328                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
329                                 else
330                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
331                         } else
332                                 flag = 0; /* period continues to the next */
333                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
334                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
335                         dev->idx_table[idx].offset = ofs;
336                         dev->idx_table[idx].size = r;
337                         ofs += r;
338                         idx++;
339                 } while (rest > 0);
340         }
341         dev->tbl_entries = idx;
342         dev->bufsize = periods * fragsize;
343         dev->bufsize2 = dev->bufsize / 2;
344         return 0;
345 }
346
347
348 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
349                            struct pci_dev *pci)
350 {
351         if (dev->table.area) {
352                 snd_dma_free_pages(&dev->table);
353                 dev->table.area = NULL;
354         }
355         kfree(dev->idx_table);
356         dev->idx_table = NULL;
357         return 0;
358 }
359
360 /*
361  *  Basic I/O
362  */
363
364 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
365 {
366         return inl(VIAREG(chip, AC97));
367 }
368  
369 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
370 {
371         outl(val, VIAREG(chip, AC97));
372 }
373  
374 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
375 {
376         unsigned int timeout = 1000;    /* 1ms */
377         unsigned int val;
378         
379         while (timeout-- > 0) {
380                 udelay(1);
381                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
382                         return val & 0xffff;
383         }
384         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
385         return -EIO;
386 }
387  
388 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
389 {
390         unsigned int timeout = 1000;    /* 1ms */
391         unsigned int val, val1;
392         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
393                                          VIA_REG_AC97_SECONDARY_VALID;
394         
395         while (timeout-- > 0) {
396                 val = snd_via82xx_codec_xread(chip);
397                 val1 = val & (VIA_REG_AC97_BUSY | stat);
398                 if (val1 == stat)
399                         return val & 0xffff;
400                 udelay(1);
401         }
402         return -EIO;
403 }
404  
405 static void snd_via82xx_codec_wait(ac97_t *ac97)
406 {
407         via82xx_t *chip = ac97->private_data;
408         int err;
409         err = snd_via82xx_codec_ready(chip, ac97->num);
410         /* here we need to wait fairly for long time.. */
411         msleep(500);
412 }
413
414 static void snd_via82xx_codec_write(ac97_t *ac97,
415                                     unsigned short reg,
416                                     unsigned short val)
417 {
418         via82xx_t *chip = ac97->private_data;
419         unsigned int xval;
420         if(reg == AC97_GPIO_STATUS) {
421                 outl(val, VIAREG(chip, GPI_STATUS));
422                 return;
423         }       
424         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
425         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
426         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
427         xval |= val << VIA_REG_AC97_DATA_SHIFT;
428         snd_via82xx_codec_xwrite(chip, xval);
429         snd_via82xx_codec_ready(chip, ac97->num);
430 }
431
432 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
433 {
434         via82xx_t *chip = ac97->private_data;
435         unsigned int xval, val = 0xffff;
436         int again = 0;
437
438         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
439         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
440         xval |= VIA_REG_AC97_READ;
441         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
442         while (1) {
443                 if (again++ > 3) {
444                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", 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(via82xx_t *chip, viadev_t *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, struct pt_regs *regs)
479 {
480         via82xx_t *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                 viadev_t *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(snd_pcm_substream_t * substream, int cmd)
517 {
518         via82xx_t *chip = snd_pcm_substream_chip(substream);
519         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
520         unsigned char val = 0;
521
522         switch (cmd) {
523         case SNDRV_PCM_TRIGGER_START:
524                 val |= VIA_REG_CTRL_START;
525                 viadev->running = 1;
526                 break;
527         case SNDRV_PCM_TRIGGER_STOP:
528                 val = VIA_REG_CTRL_TERMINATE;
529                 viadev->running = 0;
530                 break;
531         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
532                 val |= VIA_REG_CTRL_PAUSE;
533                 viadev->running = 0;
534                 break;
535         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
536                 viadev->running = 1;
537                 break;
538         default:
539                 return -EINVAL;
540         }
541         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
542         if (cmd == SNDRV_PCM_TRIGGER_STOP)
543                 snd_via82xx_channel_reset(chip, viadev);
544         return 0;
545 }
546
547 /*
548  * pointer callbacks
549  */
550
551 /*
552  * calculate the linear position at the given sg-buffer index and the rest count
553  */
554
555 #define check_invalid_pos(viadev,pos) \
556         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
557
558 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
559 {
560         unsigned int size, res;
561
562         size = viadev->idx_table[idx].size;
563         res = viadev->idx_table[idx].offset + size - count;
564
565         /* check the validity of the calculated position */
566         if (size < count) {
567                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
568                 res = viadev->lastpos;
569         } else if (check_invalid_pos(viadev, res)) {
570 #ifdef POINTER_DEBUG
571                 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);
572 #endif
573                 if (count && size < count) {
574                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
575                         res = viadev->lastpos;
576                 } else {
577                         if (! count)
578                                 /* bogus count 0 on the DMA boundary? */
579                                 res = viadev->idx_table[idx].offset;
580                         else
581                                 /* count register returns full size when end of buffer is reached */
582                                 res = viadev->idx_table[idx].offset + size;
583                         if (check_invalid_pos(viadev, res)) {
584                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
585                                 res = viadev->lastpos;
586                         }
587                 }
588         }
589         viadev->lastpos = res; /* remember the last position */
590         if (res >= viadev->bufsize)
591                 res -= viadev->bufsize;
592         return res;
593 }
594
595 /*
596  * get the current pointer on via686
597  */
598 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
599 {
600         via82xx_t *chip = snd_pcm_substream_chip(substream);
601         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
602         unsigned int idx, ptr, count, res;
603
604         snd_assert(viadev->tbl_entries, return 0);
605         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
606                 return 0;
607
608         spin_lock(&chip->reg_lock);
609         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
610         /* The via686a does not have the current index register,
611          * so we need to calculate the index from CURR_PTR.
612          */
613         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
614         if (ptr <= (unsigned int)viadev->table.addr)
615                 idx = 0;
616         else /* CURR_PTR holds the address + 8 */
617                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
618         res = calc_linear_pos(viadev, idx, count);
619         spin_unlock(&chip->reg_lock);
620
621         return bytes_to_frames(substream->runtime, res);
622 }
623
624 /*
625  * hw_params callback:
626  * allocate the buffer and build up the buffer description table
627  */
628 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
629                                  snd_pcm_hw_params_t * hw_params)
630 {
631         via82xx_t *chip = snd_pcm_substream_chip(substream);
632         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
633         int err;
634
635         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
636         if (err < 0)
637                 return err;
638         err = build_via_table(viadev, substream, chip->pci,
639                               params_periods(hw_params),
640                               params_period_bytes(hw_params));
641         if (err < 0)
642                 return err;
643
644         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
645         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
646
647         return 0;
648 }
649
650 /*
651  * hw_free callback:
652  * clean up the buffer description table and release the buffer
653  */
654 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
655 {
656         via82xx_t *chip = snd_pcm_substream_chip(substream);
657         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
658
659         clean_via_table(viadev, substream, chip->pci);
660         snd_pcm_lib_free_pages(substream);
661         return 0;
662 }
663
664
665 /*
666  * set up the table pointer
667  */
668 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
669 {
670         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
671         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
672         udelay(20);
673         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
674 }
675
676 /*
677  * prepare callback for playback and capture
678  */
679 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
680 {
681         via82xx_t *chip = snd_pcm_substream_chip(substream);
682         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
683
684         snd_via82xx_channel_reset(chip, viadev);
685         /* this must be set after channel_reset */
686         snd_via82xx_set_table_ptr(chip, viadev);
687         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
688              VIADEV_REG(viadev, OFFSET_TYPE));
689         return 0;
690 }
691
692 /*
693  * pcm hardware definition, identical for both playback and capture
694  */
695 static snd_pcm_hardware_t snd_via82xx_hw =
696 {
697         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
698                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
699                                  SNDRV_PCM_INFO_MMAP_VALID |
700                                  SNDRV_PCM_INFO_RESUME |
701                                  SNDRV_PCM_INFO_PAUSE),
702         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
703         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
704         .rate_min =             8000,
705         .rate_max =             16000,
706         .channels_min =         1,
707         .channels_max =         1,
708         .buffer_bytes_max =     128 * 1024,
709         .period_bytes_min =     32,
710         .period_bytes_max =     128 * 1024,
711         .periods_min =          2,
712         .periods_max =          VIA_TABLE_SIZE / 2,
713         .fifo_size =            0,
714 };
715
716
717 /*
718  * open callback skeleton
719  */
720 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
721 {
722         snd_pcm_runtime_t *runtime = substream->runtime;
723         int err;
724         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
725         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
726                 .count = ARRAY_SIZE(rates),
727                 .list = rates,
728                 .mask = 0,
729         };
730
731         runtime->hw = snd_via82xx_hw;
732         
733         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
734                 return err;
735
736         /* we may remove following constaint when we modify table entries
737            in interrupt */
738         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
739                 return err;
740
741         runtime->private_data = viadev;
742         viadev->substream = substream;
743
744         return 0;
745 }
746
747
748 /*
749  * open callback for playback
750  */
751 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
752 {
753         via82xx_t *chip = snd_pcm_substream_chip(substream);
754         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
755
756         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
757 }
758
759 /*
760  * open callback for capture
761  */
762 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
763 {
764         via82xx_t *chip = snd_pcm_substream_chip(substream);
765         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
766
767         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
768 }
769
770 /*
771  * close callback
772  */
773 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
774 {
775         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
776
777         viadev->substream = NULL;
778         return 0;
779 }
780
781
782 /* via686 playback callbacks */
783 static snd_pcm_ops_t snd_via686_playback_ops = {
784         .open =         snd_via82xx_playback_open,
785         .close =        snd_via82xx_pcm_close,
786         .ioctl =        snd_pcm_lib_ioctl,
787         .hw_params =    snd_via82xx_hw_params,
788         .hw_free =      snd_via82xx_hw_free,
789         .prepare =      snd_via82xx_pcm_prepare,
790         .trigger =      snd_via82xx_pcm_trigger,
791         .pointer =      snd_via686_pcm_pointer,
792         .page =         snd_pcm_sgbuf_ops_page,
793 };
794
795 /* via686 capture callbacks */
796 static snd_pcm_ops_t snd_via686_capture_ops = {
797         .open =         snd_via82xx_capture_open,
798         .close =        snd_via82xx_pcm_close,
799         .ioctl =        snd_pcm_lib_ioctl,
800         .hw_params =    snd_via82xx_hw_params,
801         .hw_free =      snd_via82xx_hw_free,
802         .prepare =      snd_via82xx_pcm_prepare,
803         .trigger =      snd_via82xx_pcm_trigger,
804         .pointer =      snd_via686_pcm_pointer,
805         .page =         snd_pcm_sgbuf_ops_page,
806 };
807
808
809 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
810 {
811         chip->devs[idx].reg_offset = reg_offset;
812         chip->devs[idx].direction = direction;
813         chip->devs[idx].port = chip->port + reg_offset;
814 }
815
816 /*
817  * create a pcm instance for via686a/b
818  */
819 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
820 {
821         snd_pcm_t *pcm;
822         int err;
823
824         chip->playback_devno = 0;
825         chip->capture_devno = 1;
826         chip->num_devs = 2;
827         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
828
829         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
830         if (err < 0)
831                 return err;
832         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
833         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
834         pcm->private_data = chip;
835         strcpy(pcm->name, chip->card->shortname);
836         chip->pcms[0] = pcm;
837         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
838         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
839
840         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
841                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
842                 return err;
843
844         return 0;
845 }
846
847
848 /*
849  *  Mixer part
850  */
851
852
853 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
854 {
855         via82xx_t *chip = bus->private_data;
856         chip->ac97_bus = NULL;
857 }
858
859 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
860 {
861         via82xx_t *chip = ac97->private_data;
862         chip->ac97 = NULL;
863 }
864
865
866 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
867 {
868         ac97_template_t ac97;
869         int err;
870         static ac97_bus_ops_t ops = {
871                 .write = snd_via82xx_codec_write,
872                 .read = snd_via82xx_codec_read,
873                 .wait = snd_via82xx_codec_wait,
874         };
875
876         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
877                 return err;
878         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
879         chip->ac97_bus->clock = chip->ac97_clock;
880         chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
881
882         memset(&ac97, 0, sizeof(ac97));
883         ac97.private_data = chip;
884         ac97.private_free = snd_via82xx_mixer_free_ac97;
885         ac97.pci = chip->pci;
886         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
887         ac97.num = chip->ac97_secondary;
888
889         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
890                 return err;
891
892         return 0;
893 }
894
895
896 /*
897  * proc interface
898  */
899 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
900 {
901         via82xx_t *chip = entry->private_data;
902         int i;
903         
904         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
905         for (i = 0; i < 0xa0; i += 4) {
906                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
907         }
908 }
909
910 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
911 {
912         snd_info_entry_t *entry;
913
914         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
915                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
916 }
917
918 /*
919  *
920  */
921
922 static int snd_via82xx_chip_init(via82xx_t *chip)
923 {
924         unsigned int val;
925         unsigned long end_time;
926         unsigned char pval;
927
928         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
929         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
930                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
931                 udelay(100);
932         }
933
934         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
935         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
936                 /* deassert ACLink reset, force SYNC */
937                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
938                                       VIA_ACLINK_CTRL_ENABLE |
939                                       VIA_ACLINK_CTRL_RESET |
940                                       VIA_ACLINK_CTRL_SYNC);
941                 udelay(100);
942 #if 1 /* FIXME: should we do full reset here for all chip models? */
943                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
944                 udelay(100);
945 #else
946                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
947                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
948                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
949                 udelay(2);
950 #endif
951                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
952                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
953                 udelay(100);
954         }
955         
956         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
957         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
958                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
959                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
960                 udelay(100);
961         }
962
963         /* wait until codec ready */
964         end_time = jiffies + msecs_to_jiffies(750);
965         do {
966                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
967                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
968                         break;
969                 set_current_state(TASK_UNINTERRUPTIBLE);
970                 schedule_timeout(1);
971         } while (time_before(jiffies, end_time));
972
973         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
974                 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
975
976         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
977                                  VIA_REG_AC97_SECONDARY_VALID |
978                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
979         end_time = jiffies + msecs_to_jiffies(750);
980         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
981                                  VIA_REG_AC97_SECONDARY_VALID |
982                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
983         do {
984                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
985                         chip->ac97_secondary = 1;
986                         goto __ac97_ok2;
987                 }
988                 set_current_state(TASK_INTERRUPTIBLE);
989                 schedule_timeout(1);
990         } while (time_before(jiffies, end_time));
991         /* This is ok, the most of motherboards have only one codec */
992
993       __ac97_ok2:
994
995         /* route FM trap to IRQ, disable FM trap */
996         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
997         /* disable all GPI interrupts */
998         outl(0, VIAREG(chip, GPI_INTR));
999
1000         return 0;
1001 }
1002
1003 #ifdef CONFIG_PM
1004 /*
1005  * power management
1006  */
1007 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1008 {
1009         via82xx_t *chip = card->pm_private_data;
1010         int i;
1011
1012         for (i = 0; i < 2; i++)
1013                 if (chip->pcms[i])
1014                         snd_pcm_suspend_all(chip->pcms[i]);
1015         for (i = 0; i < chip->num_devs; i++)
1016                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1017         synchronize_irq(chip->irq);
1018         snd_ac97_suspend(chip->ac97);
1019         pci_set_power_state(chip->pci, 3);
1020         pci_disable_device(chip->pci);
1021         return 0;
1022 }
1023
1024 static int snd_via82xx_resume(snd_card_t *card)
1025 {
1026         via82xx_t *chip = card->pm_private_data;
1027         int i;
1028
1029         pci_enable_device(chip->pci);
1030         pci_set_power_state(chip->pci, 0);
1031         pci_set_master(chip->pci);
1032
1033         snd_via82xx_chip_init(chip);
1034
1035         snd_ac97_resume(chip->ac97);
1036
1037         for (i = 0; i < chip->num_devs; i++)
1038                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1039
1040         return 0;
1041 }
1042 #endif /* CONFIG_PM */
1043
1044 static int snd_via82xx_free(via82xx_t *chip)
1045 {
1046         unsigned int i;
1047
1048         if (chip->irq < 0)
1049                 goto __end_hw;
1050         /* disable interrupts */
1051         for (i = 0; i < chip->num_devs; i++)
1052                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1053         synchronize_irq(chip->irq);
1054       __end_hw:
1055         if (chip->irq >= 0)
1056                 free_irq(chip->irq, (void *)chip);
1057         pci_release_regions(chip->pci);
1058         pci_disable_device(chip->pci);
1059         kfree(chip);
1060         return 0;
1061 }
1062
1063 static int snd_via82xx_dev_free(snd_device_t *device)
1064 {
1065         via82xx_t *chip = device->device_data;
1066         return snd_via82xx_free(chip);
1067 }
1068
1069 static int __devinit snd_via82xx_create(snd_card_t * card,
1070                                         struct pci_dev *pci,
1071                                         int chip_type,
1072                                         int revision,
1073                                         unsigned int ac97_clock,
1074                                         via82xx_t ** r_via)
1075 {
1076         via82xx_t *chip;
1077         int err;
1078         static snd_device_ops_t ops = {
1079                 .dev_free =     snd_via82xx_dev_free,
1080         };
1081
1082         if ((err = pci_enable_device(pci)) < 0)
1083                 return err;
1084
1085         if ((chip = kcalloc(1, sizeof(*chip), GFP_KERNEL)) == NULL) {
1086                 pci_disable_device(pci);
1087                 return -ENOMEM;
1088         }
1089
1090         spin_lock_init(&chip->reg_lock);
1091         chip->card = card;
1092         chip->pci = pci;
1093         chip->irq = -1;
1094
1095         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1096                 kfree(chip);
1097                 pci_disable_device(pci);
1098                 return err;
1099         }
1100         chip->port = pci_resource_start(pci, 0);
1101         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1102                         card->driver, (void *)chip)) {
1103                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1104                 snd_via82xx_free(chip);
1105                 return -EBUSY;
1106         }
1107         chip->irq = pci->irq;
1108         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1109                 chip->ac97_clock = ac97_clock;
1110         synchronize_irq(chip->irq);
1111
1112         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1113                 snd_via82xx_free(chip);
1114                 return err;
1115         }
1116
1117         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1118                 snd_via82xx_free(chip);
1119                 return err;
1120         }
1121
1122         /* The 8233 ac97 controller does not implement the master bit
1123          * in the pci command register. IMHO this is a violation of the PCI spec.
1124          * We call pci_set_master here because it does not hurt. */
1125         pci_set_master(pci);
1126
1127         snd_card_set_dev(card, &pci->dev);
1128
1129         *r_via = chip;
1130         return 0;
1131 }
1132
1133
1134 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1135                                        const struct pci_device_id *pci_id)
1136 {
1137         static int dev;
1138         snd_card_t *card;
1139         via82xx_t *chip;
1140         unsigned char revision;
1141         int chip_type = 0, card_type;
1142         unsigned int i;
1143         int err;
1144
1145         if (dev >= SNDRV_CARDS)
1146                 return -ENODEV;
1147         if (!enable[dev]) {
1148                 dev++;
1149                 return -ENOENT;
1150         }
1151
1152         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1153         if (card == NULL)
1154                 return -ENOMEM;
1155
1156         card_type = pci_id->driver_data;
1157         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1158         switch (card_type) {
1159         case TYPE_CARD_VIA82XX_MODEM:
1160                 strcpy(card->driver, "VIA82XX-MODEM");
1161                 sprintf(card->shortname, "VIA 82XX modem");
1162                 break;
1163         default:
1164                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1165                 err = -EINVAL;
1166                 goto __error;
1167         }
1168                 
1169         if ((err = snd_via82xx_create(card, pci, chip_type, revision, ac97_clock[dev], &chip)) < 0)
1170                 goto __error;
1171         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1172                 goto __error;
1173
1174         if ((err = snd_via686_pcm_new(chip)) < 0 )
1175                 goto __error;
1176
1177         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1178
1179         /* disable interrupts */
1180         for (i = 0; i < chip->num_devs; i++)
1181                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1182
1183         sprintf(card->longname, "%s at 0x%lx, irq %d",
1184                 card->shortname, chip->port, chip->irq);
1185
1186         snd_via82xx_proc_init(chip);
1187
1188         if ((err = snd_card_register(card)) < 0) {
1189                 snd_card_free(card);
1190                 return err;
1191         }
1192         pci_set_drvdata(pci, card);
1193         dev++;
1194         return 0;
1195
1196  __error:
1197         snd_card_free(card);
1198         return err;
1199 }
1200
1201 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1202 {
1203         snd_card_free(pci_get_drvdata(pci));
1204         pci_set_drvdata(pci, NULL);
1205 }
1206
1207 static struct pci_driver driver = {
1208         .name = "VIA 82xx Modem",
1209         .id_table = snd_via82xx_modem_ids,
1210         .probe = snd_via82xx_probe,
1211         .remove = __devexit_p(snd_via82xx_remove),
1212         SND_PCI_PM_CALLBACKS
1213 };
1214
1215 static int __init alsa_card_via82xx_init(void)
1216 {
1217         return pci_register_driver(&driver);
1218 }
1219
1220 static void __exit alsa_card_via82xx_exit(void)
1221 {
1222         pci_unregister_driver(&driver);
1223 }
1224
1225 module_init(alsa_card_via82xx_init)
1226 module_exit(alsa_card_via82xx_exit)