ALSA: hdsp - Provide ioctl_compat
[linux-2.6.git] / sound / pci / via82xx_modem.c
1 /*
2  *   ALSA modem driver for VIA VT82xx (South Bridge)
3  *
4  *   VT82C686A/B/C, VT8233A/C, VT8235
5  *
6  *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
7  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
8  *                    2002 Takashi Iwai <tiwai@suse.de>
9  *
10  *   This program is free software; you can redistribute it and/or modify
11  *   it under the terms of the GNU General Public License as published by
12  *   the Free Software Foundation; either version 2 of the License, or
13  *   (at your option) any later version.
14  *
15  *   This program is distributed in the hope that it will be useful,
16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *   GNU General Public License for more details.
19  *
20  *   You should have received a copy of the GNU General Public License
21  *   along with this program; if not, write to the Free Software
22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23  *
24  */
25
26 /*
27  * Changes:
28  *
29  * Sep. 2,  2004  Sasha Khapyorsky <sashak@alsa-project.org>
30  *      Modified from original audio driver 'via82xx.c' to support AC97
31  *      modems.
32  */
33
34 #include <asm/io.h>
35 #include <linux/delay.h>
36 #include <linux/interrupt.h>
37 #include <linux/init.h>
38 #include <linux/pci.h>
39 #include <linux/slab.h>
40 #include <linux/module.h>
41 #include <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/info.h>
45 #include <sound/ac97_codec.h>
46 #include <sound/initval.h>
47
48 #if 0
49 #define POINTER_DEBUG
50 #endif
51
52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
53 MODULE_DESCRIPTION("VIA VT82xx modem");
54 MODULE_LICENSE("GPL");
55 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
56
57 static int index = -2; /* Exclude the first card */
58 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
59 static int ac97_clock = 48000;
60
61 module_param(index, int, 0444);
62 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
63 module_param(id, charp, 0444);
64 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
65 module_param(ac97_clock, int, 0444);
66 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
67
68 /* just for backward compatibility */
69 static bool enable;
70 module_param(enable, bool, 0444);
71
72
73 /*
74  *  Direct registers
75  */
76
77 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
78 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
79
80 /* common offsets */
81 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
82 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
83 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
84 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
85 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
86 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
87 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
88 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
89 #define   VIA_REG_CTRL_START            0x80    /* WO */
90 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
91 #define   VIA_REG_CTRL_AUTOSTART        0x20
92 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
93 #define   VIA_REG_CTRL_INT_STOP         0x04            
94 #define   VIA_REG_CTRL_INT_EOL          0x02
95 #define   VIA_REG_CTRL_INT_FLAG         0x01
96 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
97 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
98 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
99 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
100 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
101 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
102 #define   VIA_REG_TYPE_INT_LLINE        0x00
103 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
104 #define   VIA_REG_TYPE_INT_LESSONE      0x08
105 #define   VIA_REG_TYPE_INT_MASK         0x0c
106 #define   VIA_REG_TYPE_INT_EOL          0x02
107 #define   VIA_REG_TYPE_INT_FLAG         0x01
108 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
109 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
110 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
111 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
112 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
113
114 #define DEFINE_VIA_REGSET(name,val) \
115 enum {\
116         VIA_REG_##name##_STATUS         = (val),\
117         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
118         VIA_REG_##name##_TYPE           = (val) + 0x02,\
119         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
120         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
121         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
122         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
123 }
124
125 /* modem block */
126 DEFINE_VIA_REGSET(MO, 0x40);
127 DEFINE_VIA_REGSET(MI, 0x50);
128
129 /* AC'97 */
130 #define VIA_REG_AC97                    0x80    /* dword */
131 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
132 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
133 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
134 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
135 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
136 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
137 #define   VIA_REG_AC97_BUSY             (1<<24)
138 #define   VIA_REG_AC97_READ             (1<<23)
139 #define   VIA_REG_AC97_CMD_SHIFT        16
140 #define   VIA_REG_AC97_CMD_MASK         0x7e
141 #define   VIA_REG_AC97_DATA_SHIFT       0
142 #define   VIA_REG_AC97_DATA_MASK        0xffff
143
144 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
145 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
146 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
147 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
148 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
149 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
150 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
151 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
152 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
153 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
154 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
155 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
156 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
157 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
158 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
159 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
160 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
161 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
162 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
163 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
164 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
165
166 #define VIA_REG_GPI_STATUS              0x88
167 #define VIA_REG_GPI_INTR                0x8c
168
169 #define VIA_TBL_BIT_FLAG        0x40000000
170 #define VIA_TBL_BIT_EOL         0x80000000
171
172 /* pci space */
173 #define VIA_ACLINK_STAT         0x40
174 #define  VIA_ACLINK_C11_READY   0x20
175 #define  VIA_ACLINK_C10_READY   0x10
176 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
177 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
178 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
179 #define VIA_ACLINK_CTRL         0x41
180 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
181 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
182 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
183 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
184 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
185 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
186 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
187 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
188 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
189                                  VIA_ACLINK_CTRL_RESET|\
190                                  VIA_ACLINK_CTRL_PCM)
191 #define VIA_FUNC_ENABLE         0x42
192 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
193 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
194 #define  VIA_FUNC_RX2C_WRITE    0x20
195 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
196 #define  VIA_FUNC_ENABLE_GAME   0x08
197 #define  VIA_FUNC_ENABLE_FM     0x04
198 #define  VIA_FUNC_ENABLE_MIDI   0x02
199 #define  VIA_FUNC_ENABLE_SB     0x01
200 #define VIA_PNP_CONTROL         0x43
201 #define VIA_MC97_CTRL           0x44
202 #define  VIA_MC97_CTRL_ENABLE   0x80
203 #define  VIA_MC97_CTRL_SECONDARY 0x40
204 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
205                                  VIA_MC97_CTRL_SECONDARY)
206
207
208 /*
209  * pcm stream
210  */
211
212 struct snd_via_sg_table {
213         unsigned int offset;
214         unsigned int size;
215 } ;
216
217 #define VIA_TABLE_SIZE  255
218
219 struct viadev {
220         unsigned int reg_offset;
221         unsigned long port;
222         int direction;  /* playback = 0, capture = 1 */
223         struct snd_pcm_substream *substream;
224         int running;
225         unsigned int tbl_entries; /* # descriptors */
226         struct snd_dma_buffer table;
227         struct snd_via_sg_table *idx_table;
228         /* for recovery from the unexpected pointer */
229         unsigned int lastpos;
230         unsigned int bufsize;
231         unsigned int bufsize2;
232 };
233
234 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
235
236 #define VIA_MAX_MODEM_DEVS      2
237
238 struct via82xx_modem {
239         int irq;
240
241         unsigned long port;
242
243         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
244
245         struct pci_dev *pci;
246         struct snd_card *card;
247
248         unsigned int num_devs;
249         unsigned int playback_devno, capture_devno;
250         struct viadev devs[VIA_MAX_MODEM_DEVS];
251
252         struct snd_pcm *pcms[2];
253
254         struct snd_ac97_bus *ac97_bus;
255         struct snd_ac97 *ac97;
256         unsigned int ac97_clock;
257         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
258
259         spinlock_t reg_lock;
260         struct snd_info_entry *proc_entry;
261 };
262
263 static DEFINE_PCI_DEVICE_TABLE(snd_via82xx_modem_ids) = {
264         { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
265         { 0, }
266 };
267
268 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
269
270 /*
271  */
272
273 /*
274  * allocate and initialize the descriptor buffers
275  * periods = number of periods
276  * fragsize = period size in bytes
277  */
278 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
279                            struct pci_dev *pci,
280                            unsigned int periods, unsigned int fragsize)
281 {
282         unsigned int i, idx, ofs, rest;
283         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
284
285         if (dev->table.area == NULL) {
286                 /* the start of each lists must be aligned to 8 bytes,
287                  * but the kernel pages are much bigger, so we don't care
288                  */
289                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
290                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
291                                         &dev->table) < 0)
292                         return -ENOMEM;
293         }
294         if (! dev->idx_table) {
295                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
296                 if (! dev->idx_table)
297                         return -ENOMEM;
298         }
299
300         /* fill the entries */
301         idx = 0;
302         ofs = 0;
303         for (i = 0; i < periods; i++) {
304                 rest = fragsize;
305                 /* fill descriptors for a period.
306                  * a period can be split to several descriptors if it's
307                  * over page boundary.
308                  */
309                 do {
310                         unsigned int r;
311                         unsigned int flag;
312                         unsigned int addr;
313
314                         if (idx >= VIA_TABLE_SIZE) {
315                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
316                                 return -EINVAL;
317                         }
318                         addr = snd_pcm_sgbuf_get_addr(substream, ofs);
319                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
320                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
321                         if (rest < r)
322                                 r = rest;
323                         rest -= r;
324                         if (! rest) {
325                                 if (i == periods - 1)
326                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
327                                 else
328                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
329                         } else
330                                 flag = 0; /* period continues to the next */
331                         /*
332                         printk(KERN_DEBUG "via: tbl %d: at %d  size %d "
333                                "(rest %d)\n", idx, ofs, r, rest);
334                         */
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(struct viadev *dev, struct snd_pcm_substream *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(struct via82xx_modem *chip)
366 {
367         return inl(VIAREG(chip, AC97));
368 }
369  
370 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
371 {
372         outl(val, VIAREG(chip, AC97));
373 }
374  
375 static int snd_via82xx_codec_ready(struct via82xx_modem *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",
386                    secondary, snd_via82xx_codec_xread(chip));
387         return -EIO;
388 }
389  
390 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
391 {
392         unsigned int timeout = 1000;    /* 1ms */
393         unsigned int val, val1;
394         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
395                                          VIA_REG_AC97_SECONDARY_VALID;
396         
397         while (timeout-- > 0) {
398                 val = snd_via82xx_codec_xread(chip);
399                 val1 = val & (VIA_REG_AC97_BUSY | stat);
400                 if (val1 == stat)
401                         return val & 0xffff;
402                 udelay(1);
403         }
404         return -EIO;
405 }
406  
407 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
408 {
409         struct via82xx_modem *chip = ac97->private_data;
410         int err;
411         err = snd_via82xx_codec_ready(chip, ac97->num);
412         /* here we need to wait fairly for long time.. */
413         msleep(500);
414 }
415
416 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
417                                     unsigned short reg,
418                                     unsigned short val)
419 {
420         struct via82xx_modem *chip = ac97->private_data;
421         unsigned int xval;
422         if(reg == AC97_GPIO_STATUS) {
423                 outl(val, VIAREG(chip, GPI_STATUS));
424                 return;
425         }       
426         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
427         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
428         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
429         xval |= val << VIA_REG_AC97_DATA_SHIFT;
430         snd_via82xx_codec_xwrite(chip, xval);
431         snd_via82xx_codec_ready(chip, ac97->num);
432 }
433
434 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
435 {
436         struct via82xx_modem *chip = ac97->private_data;
437         unsigned int xval, val = 0xffff;
438         int again = 0;
439
440         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
441         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
442         xval |= VIA_REG_AC97_READ;
443         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
444         while (1) {
445                 if (again++ > 3) {
446                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n",
447                                    ac97->num, snd_via82xx_codec_xread(chip));
448                         return 0xffff;
449                 }
450                 snd_via82xx_codec_xwrite(chip, xval);
451                 udelay (20);
452                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
453                         udelay(25);
454                         val = snd_via82xx_codec_xread(chip);
455                         break;
456                 }
457         }
458         return val & 0xffff;
459 }
460
461 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
462 {
463         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
464              VIADEV_REG(viadev, OFFSET_CONTROL));
465         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
466         udelay(50);
467         /* disable interrupts */
468         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
469         /* clear interrupts */
470         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
471         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
472         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
473         viadev->lastpos = 0;
474 }
475
476
477 /*
478  *  Interrupt handler
479  */
480
481 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
482 {
483         struct via82xx_modem *chip = dev_id;
484         unsigned int status;
485         unsigned int i;
486
487         status = inl(VIAREG(chip, SGD_SHADOW));
488         if (! (status & chip->intr_mask)) {
489                 return IRQ_NONE;
490         }
491 // _skip_sgd:
492
493         /* check status for each stream */
494         spin_lock(&chip->reg_lock);
495         for (i = 0; i < chip->num_devs; i++) {
496                 struct viadev *viadev = &chip->devs[i];
497                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
498                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
499                 if (! c_status)
500                         continue;
501                 if (viadev->substream && viadev->running) {
502                         spin_unlock(&chip->reg_lock);
503                         snd_pcm_period_elapsed(viadev->substream);
504                         spin_lock(&chip->reg_lock);
505                 }
506                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
507         }
508         spin_unlock(&chip->reg_lock);
509         return IRQ_HANDLED;
510 }
511
512 /*
513  *  PCM callbacks
514  */
515
516 /*
517  * trigger callback
518  */
519 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
520 {
521         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
522         struct viadev *viadev = substream->runtime->private_data;
523         unsigned char val = 0;
524
525         switch (cmd) {
526         case SNDRV_PCM_TRIGGER_START:
527         case SNDRV_PCM_TRIGGER_SUSPEND:
528                 val |= VIA_REG_CTRL_START;
529                 viadev->running = 1;
530                 break;
531         case SNDRV_PCM_TRIGGER_STOP:
532                 val = VIA_REG_CTRL_TERMINATE;
533                 viadev->running = 0;
534                 break;
535         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
536                 val |= VIA_REG_CTRL_PAUSE;
537                 viadev->running = 0;
538                 break;
539         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
540                 viadev->running = 1;
541                 break;
542         default:
543                 return -EINVAL;
544         }
545         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
546         if (cmd == SNDRV_PCM_TRIGGER_STOP)
547                 snd_via82xx_channel_reset(chip, viadev);
548         return 0;
549 }
550
551 /*
552  * pointer callbacks
553  */
554
555 /*
556  * calculate the linear position at the given sg-buffer index and the rest count
557  */
558
559 #define check_invalid_pos(viadev,pos) \
560         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
561                                      viadev->lastpos < viadev->bufsize2))
562
563 static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx,
564                                            unsigned int count)
565 {
566         unsigned int size, res;
567
568         size = viadev->idx_table[idx].size;
569         res = viadev->idx_table[idx].offset + size - count;
570
571         /* check the validity of the calculated position */
572         if (size < count) {
573                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
574                            (int)size, (int)count);
575                 res = viadev->lastpos;
576         } else if (check_invalid_pos(viadev, res)) {
577 #ifdef POINTER_DEBUG
578                 printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, "
579                        "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
580                        "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos,
581                        viadev->bufsize2, viadev->idx_table[idx].offset,
582                        viadev->idx_table[idx].size, count);
583 #endif
584                 if (count && size < count) {
585                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, "
586                                    "using last valid pointer\n");
587                         res = viadev->lastpos;
588                 } else {
589                         if (! count)
590                                 /* bogus count 0 on the DMA boundary? */
591                                 res = viadev->idx_table[idx].offset;
592                         else
593                                 /* count register returns full size
594                                  * when end of buffer is reached
595                                  */
596                                 res = viadev->idx_table[idx].offset + size;
597                         if (check_invalid_pos(viadev, res)) {
598                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), "
599                                            "using last valid pointer\n");
600                                 res = viadev->lastpos;
601                         }
602                 }
603         }
604         viadev->lastpos = res; /* remember the last position */
605         if (res >= viadev->bufsize)
606                 res -= viadev->bufsize;
607         return res;
608 }
609
610 /*
611  * get the current pointer on via686
612  */
613 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
614 {
615         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
616         struct viadev *viadev = substream->runtime->private_data;
617         unsigned int idx, ptr, count, res;
618
619         if (snd_BUG_ON(!viadev->tbl_entries))
620                 return 0;
621         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
622                 return 0;
623
624         spin_lock(&chip->reg_lock);
625         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
626         /* The via686a does not have the current index register,
627          * so we need to calculate the index from CURR_PTR.
628          */
629         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
630         if (ptr <= (unsigned int)viadev->table.addr)
631                 idx = 0;
632         else /* CURR_PTR holds the address + 8 */
633                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
634                         viadev->tbl_entries;
635         res = calc_linear_pos(viadev, idx, count);
636         spin_unlock(&chip->reg_lock);
637
638         return bytes_to_frames(substream->runtime, res);
639 }
640
641 /*
642  * hw_params callback:
643  * allocate the buffer and build up the buffer description table
644  */
645 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
646                                  struct snd_pcm_hw_params *hw_params)
647 {
648         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
649         struct viadev *viadev = substream->runtime->private_data;
650         int err;
651
652         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
653         if (err < 0)
654                 return err;
655         err = build_via_table(viadev, substream, chip->pci,
656                               params_periods(hw_params),
657                               params_period_bytes(hw_params));
658         if (err < 0)
659                 return err;
660
661         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
662         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
663
664         return 0;
665 }
666
667 /*
668  * hw_free callback:
669  * clean up the buffer description table and release the buffer
670  */
671 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
672 {
673         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
674         struct viadev *viadev = substream->runtime->private_data;
675
676         clean_via_table(viadev, substream, chip->pci);
677         snd_pcm_lib_free_pages(substream);
678         return 0;
679 }
680
681
682 /*
683  * set up the table pointer
684  */
685 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
686 {
687         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
688         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
689         udelay(20);
690         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
691 }
692
693 /*
694  * prepare callback for playback and capture
695  */
696 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
697 {
698         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
699         struct viadev *viadev = substream->runtime->private_data;
700
701         snd_via82xx_channel_reset(chip, viadev);
702         /* this must be set after channel_reset */
703         snd_via82xx_set_table_ptr(chip, viadev);
704         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
705              VIADEV_REG(viadev, OFFSET_TYPE));
706         return 0;
707 }
708
709 /*
710  * pcm hardware definition, identical for both playback and capture
711  */
712 static struct snd_pcm_hardware snd_via82xx_hw =
713 {
714         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
715                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
716                                  SNDRV_PCM_INFO_MMAP_VALID |
717                                  /* SNDRV_PCM_INFO_RESUME | */
718                                  SNDRV_PCM_INFO_PAUSE),
719         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
720         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
721         .rate_min =             8000,
722         .rate_max =             16000,
723         .channels_min =         1,
724         .channels_max =         1,
725         .buffer_bytes_max =     128 * 1024,
726         .period_bytes_min =     32,
727         .period_bytes_max =     128 * 1024,
728         .periods_min =          2,
729         .periods_max =          VIA_TABLE_SIZE / 2,
730         .fifo_size =            0,
731 };
732
733
734 /*
735  * open callback skeleton
736  */
737 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
738                                       struct snd_pcm_substream *substream)
739 {
740         struct snd_pcm_runtime *runtime = substream->runtime;
741         int err;
742         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
743         static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
744                 .count = ARRAY_SIZE(rates),
745                 .list = rates,
746                 .mask = 0,
747         };
748
749         runtime->hw = snd_via82xx_hw;
750         
751         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
752                                               &hw_constraints_rates)) < 0)
753                 return err;
754
755         /* we may remove following constaint when we modify table entries
756            in interrupt */
757         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
758                 return err;
759
760         runtime->private_data = viadev;
761         viadev->substream = substream;
762
763         return 0;
764 }
765
766
767 /*
768  * open callback for playback
769  */
770 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
771 {
772         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
773         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
774
775         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
776 }
777
778 /*
779  * open callback for capture
780  */
781 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
782 {
783         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
784         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
785
786         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
787 }
788
789 /*
790  * close callback
791  */
792 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
793 {
794         struct viadev *viadev = substream->runtime->private_data;
795
796         viadev->substream = NULL;
797         return 0;
798 }
799
800
801 /* via686 playback callbacks */
802 static struct snd_pcm_ops snd_via686_playback_ops = {
803         .open =         snd_via82xx_playback_open,
804         .close =        snd_via82xx_pcm_close,
805         .ioctl =        snd_pcm_lib_ioctl,
806         .hw_params =    snd_via82xx_hw_params,
807         .hw_free =      snd_via82xx_hw_free,
808         .prepare =      snd_via82xx_pcm_prepare,
809         .trigger =      snd_via82xx_pcm_trigger,
810         .pointer =      snd_via686_pcm_pointer,
811         .page =         snd_pcm_sgbuf_ops_page,
812 };
813
814 /* via686 capture callbacks */
815 static struct snd_pcm_ops snd_via686_capture_ops = {
816         .open =         snd_via82xx_capture_open,
817         .close =        snd_via82xx_pcm_close,
818         .ioctl =        snd_pcm_lib_ioctl,
819         .hw_params =    snd_via82xx_hw_params,
820         .hw_free =      snd_via82xx_hw_free,
821         .prepare =      snd_via82xx_pcm_prepare,
822         .trigger =      snd_via82xx_pcm_trigger,
823         .pointer =      snd_via686_pcm_pointer,
824         .page =         snd_pcm_sgbuf_ops_page,
825 };
826
827
828 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
829                         int direction)
830 {
831         chip->devs[idx].reg_offset = reg_offset;
832         chip->devs[idx].direction = direction;
833         chip->devs[idx].port = chip->port + reg_offset;
834 }
835
836 /*
837  * create a pcm instance for via686a/b
838  */
839 static int __devinit snd_via686_pcm_new(struct via82xx_modem *chip)
840 {
841         struct snd_pcm *pcm;
842         int err;
843
844         chip->playback_devno = 0;
845         chip->capture_devno = 1;
846         chip->num_devs = 2;
847         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
848
849         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
850         if (err < 0)
851                 return err;
852         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
853         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
854         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
855         pcm->private_data = chip;
856         strcpy(pcm->name, chip->card->shortname);
857         chip->pcms[0] = pcm;
858         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
859         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
860
861         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
862                                                          snd_dma_pci_data(chip->pci),
863                                                          64*1024, 128*1024)) < 0)
864                 return err;
865
866         return 0;
867 }
868
869
870 /*
871  *  Mixer part
872  */
873
874
875 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
876 {
877         struct via82xx_modem *chip = bus->private_data;
878         chip->ac97_bus = NULL;
879 }
880
881 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
882 {
883         struct via82xx_modem *chip = ac97->private_data;
884         chip->ac97 = NULL;
885 }
886
887
888 static int __devinit snd_via82xx_mixer_new(struct via82xx_modem *chip)
889 {
890         struct snd_ac97_template ac97;
891         int err;
892         static struct snd_ac97_bus_ops ops = {
893                 .write = snd_via82xx_codec_write,
894                 .read = snd_via82xx_codec_read,
895                 .wait = snd_via82xx_codec_wait,
896         };
897
898         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
899                 return err;
900         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
901         chip->ac97_bus->clock = chip->ac97_clock;
902
903         memset(&ac97, 0, sizeof(ac97));
904         ac97.private_data = chip;
905         ac97.private_free = snd_via82xx_mixer_free_ac97;
906         ac97.pci = chip->pci;
907         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
908         ac97.num = chip->ac97_secondary;
909
910         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
911                 return err;
912
913         return 0;
914 }
915
916
917 /*
918  * proc interface
919  */
920 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
921 {
922         struct via82xx_modem *chip = entry->private_data;
923         int i;
924         
925         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
926         for (i = 0; i < 0xa0; i += 4) {
927                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
928         }
929 }
930
931 static void __devinit snd_via82xx_proc_init(struct via82xx_modem *chip)
932 {
933         struct snd_info_entry *entry;
934
935         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
936                 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
937 }
938
939 /*
940  *
941  */
942
943 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
944 {
945         unsigned int val;
946         unsigned long end_time;
947         unsigned char pval;
948
949         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
950         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
951                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
952                 udelay(100);
953         }
954
955         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
956         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
957                 /* deassert ACLink reset, force SYNC */
958                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
959                                       VIA_ACLINK_CTRL_ENABLE |
960                                       VIA_ACLINK_CTRL_RESET |
961                                       VIA_ACLINK_CTRL_SYNC);
962                 udelay(100);
963 #if 1 /* FIXME: should we do full reset here for all chip models? */
964                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
965                 udelay(100);
966 #else
967                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
968                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
969                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
970                 udelay(2);
971 #endif
972                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
973                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
974                 udelay(100);
975         }
976         
977         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
978         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
979                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
980                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
981                 udelay(100);
982         }
983
984         /* wait until codec ready */
985         end_time = jiffies + msecs_to_jiffies(750);
986         do {
987                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
988                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
989                         break;
990                 schedule_timeout_uninterruptible(1);
991         } while (time_before(jiffies, end_time));
992
993         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
994                 snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
995
996         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
997                                  VIA_REG_AC97_SECONDARY_VALID |
998                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
999         end_time = jiffies + msecs_to_jiffies(750);
1000         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1001                                  VIA_REG_AC97_SECONDARY_VALID |
1002                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1003         do {
1004                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1005                         chip->ac97_secondary = 1;
1006                         goto __ac97_ok2;
1007                 }
1008                 schedule_timeout_uninterruptible(1);
1009         } while (time_before(jiffies, end_time));
1010         /* This is ok, the most of motherboards have only one codec */
1011
1012       __ac97_ok2:
1013
1014         /* route FM trap to IRQ, disable FM trap */
1015         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1016         /* disable all GPI interrupts */
1017         outl(0, VIAREG(chip, GPI_INTR));
1018
1019         return 0;
1020 }
1021
1022 #ifdef CONFIG_PM
1023 /*
1024  * power management
1025  */
1026 static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state)
1027 {
1028         struct snd_card *card = pci_get_drvdata(pci);
1029         struct via82xx_modem *chip = card->private_data;
1030         int i;
1031
1032         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1033         for (i = 0; i < 2; i++)
1034                 snd_pcm_suspend_all(chip->pcms[i]);
1035         for (i = 0; i < chip->num_devs; i++)
1036                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1037         synchronize_irq(chip->irq);
1038         snd_ac97_suspend(chip->ac97);
1039
1040         pci_disable_device(pci);
1041         pci_save_state(pci);
1042         pci_set_power_state(pci, pci_choose_state(pci, state));
1043         return 0;
1044 }
1045
1046 static int snd_via82xx_resume(struct pci_dev *pci)
1047 {
1048         struct snd_card *card = pci_get_drvdata(pci);
1049         struct via82xx_modem *chip = card->private_data;
1050         int i;
1051
1052         pci_set_power_state(pci, PCI_D0);
1053         pci_restore_state(pci);
1054         if (pci_enable_device(pci) < 0) {
1055                 printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1056                        "disabling device\n");
1057                 snd_card_disconnect(card);
1058                 return -EIO;
1059         }
1060         pci_set_master(pci);
1061
1062         snd_via82xx_chip_init(chip);
1063
1064         snd_ac97_resume(chip->ac97);
1065
1066         for (i = 0; i < chip->num_devs; i++)
1067                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1068
1069         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1070         return 0;
1071 }
1072 #endif /* CONFIG_PM */
1073
1074 static int snd_via82xx_free(struct via82xx_modem *chip)
1075 {
1076         unsigned int i;
1077
1078         if (chip->irq < 0)
1079                 goto __end_hw;
1080         /* disable interrupts */
1081         for (i = 0; i < chip->num_devs; i++)
1082                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1083
1084       __end_hw:
1085         if (chip->irq >= 0)
1086                 free_irq(chip->irq, chip);
1087         pci_release_regions(chip->pci);
1088         pci_disable_device(chip->pci);
1089         kfree(chip);
1090         return 0;
1091 }
1092
1093 static int snd_via82xx_dev_free(struct snd_device *device)
1094 {
1095         struct via82xx_modem *chip = device->device_data;
1096         return snd_via82xx_free(chip);
1097 }
1098
1099 static int __devinit snd_via82xx_create(struct snd_card *card,
1100                                         struct pci_dev *pci,
1101                                         int chip_type,
1102                                         int revision,
1103                                         unsigned int ac97_clock,
1104                                         struct via82xx_modem ** r_via)
1105 {
1106         struct via82xx_modem *chip;
1107         int err;
1108         static struct snd_device_ops ops = {
1109                 .dev_free =     snd_via82xx_dev_free,
1110         };
1111
1112         if ((err = pci_enable_device(pci)) < 0)
1113                 return err;
1114
1115         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1116                 pci_disable_device(pci);
1117                 return -ENOMEM;
1118         }
1119
1120         spin_lock_init(&chip->reg_lock);
1121         chip->card = card;
1122         chip->pci = pci;
1123         chip->irq = -1;
1124
1125         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1126                 kfree(chip);
1127                 pci_disable_device(pci);
1128                 return err;
1129         }
1130         chip->port = pci_resource_start(pci, 0);
1131         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1132                         KBUILD_MODNAME, chip)) {
1133                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1134                 snd_via82xx_free(chip);
1135                 return -EBUSY;
1136         }
1137         chip->irq = pci->irq;
1138         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1139                 chip->ac97_clock = ac97_clock;
1140         synchronize_irq(chip->irq);
1141
1142         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1143                 snd_via82xx_free(chip);
1144                 return err;
1145         }
1146
1147         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1148                 snd_via82xx_free(chip);
1149                 return err;
1150         }
1151
1152         /* The 8233 ac97 controller does not implement the master bit
1153          * in the pci command register. IMHO this is a violation of the PCI spec.
1154          * We call pci_set_master here because it does not hurt. */
1155         pci_set_master(pci);
1156
1157         snd_card_set_dev(card, &pci->dev);
1158
1159         *r_via = chip;
1160         return 0;
1161 }
1162
1163
1164 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1165                                        const struct pci_device_id *pci_id)
1166 {
1167         struct snd_card *card;
1168         struct via82xx_modem *chip;
1169         int chip_type = 0, card_type;
1170         unsigned int i;
1171         int err;
1172
1173         err = snd_card_create(index, id, THIS_MODULE, 0, &card);
1174         if (err < 0)
1175                 return err;
1176
1177         card_type = pci_id->driver_data;
1178         switch (card_type) {
1179         case TYPE_CARD_VIA82XX_MODEM:
1180                 strcpy(card->driver, "VIA82XX-MODEM");
1181                 sprintf(card->shortname, "VIA 82XX modem");
1182                 break;
1183         default:
1184                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1185                 err = -EINVAL;
1186                 goto __error;
1187         }
1188                 
1189         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1190                                       ac97_clock, &chip)) < 0)
1191                 goto __error;
1192         card->private_data = chip;
1193         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1194                 goto __error;
1195
1196         if ((err = snd_via686_pcm_new(chip)) < 0 )
1197                 goto __error;
1198
1199         /* disable interrupts */
1200         for (i = 0; i < chip->num_devs; i++)
1201                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1202
1203         sprintf(card->longname, "%s at 0x%lx, irq %d",
1204                 card->shortname, chip->port, chip->irq);
1205
1206         snd_via82xx_proc_init(chip);
1207
1208         if ((err = snd_card_register(card)) < 0) {
1209                 snd_card_free(card);
1210                 return err;
1211         }
1212         pci_set_drvdata(pci, card);
1213         return 0;
1214
1215  __error:
1216         snd_card_free(card);
1217         return err;
1218 }
1219
1220 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1221 {
1222         snd_card_free(pci_get_drvdata(pci));
1223         pci_set_drvdata(pci, NULL);
1224 }
1225
1226 static struct pci_driver driver = {
1227         .name = KBUILD_MODNAME,
1228         .id_table = snd_via82xx_modem_ids,
1229         .probe = snd_via82xx_probe,
1230         .remove = __devexit_p(snd_via82xx_remove),
1231 #ifdef CONFIG_PM
1232         .suspend = snd_via82xx_suspend,
1233         .resume = snd_via82xx_resume,
1234 #endif
1235 };
1236
1237 static int __init alsa_card_via82xx_init(void)
1238 {
1239         return pci_register_driver(&driver);
1240 }
1241
1242 static void __exit alsa_card_via82xx_exit(void)
1243 {
1244         pci_unregister_driver(&driver);
1245 }
1246
1247 module_init(alsa_card_via82xx_init)
1248 module_exit(alsa_card_via82xx_exit)