3aa9d31d99927cd40a3ea95139eabfa2f26eeceb
[linux-2.6.git] / sound / pci / via82xx_modem.c
1 /*
2  *   ALSA modem driver for VIA VT82xx (South Bridge)
3  *
4  *   VT82C686A/B/C, VT8233A/C, VT8235
5  *
6  *      Copyright (c) 2000 Jaroslav Kysela <perex@suse.cz>
7  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
8  *                    2002 Takashi Iwai <tiwai@suse.de>
9  *
10  *   This program is free software; you can redistribute it and/or modify
11  *   it under the terms of the GNU General Public License as published by
12  *   the Free Software Foundation; either version 2 of the License, or
13  *   (at your option) any later version.
14  *
15  *   This program is distributed in the hope that it will be useful,
16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *   GNU General Public License for more details.
19  *
20  *   You should have received a copy of the GNU General Public License
21  *   along with this program; if not, write to the Free Software
22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23  *
24  */
25
26 /*
27  * Changes:
28  *
29  * Sep. 2,  2004  Sasha Khapyorsky <sashak@alsa-project.org>
30  *      Modified from original audio driver 'via82xx.c' to support AC97
31  *      modems.
32  */
33
34 #include <sound/driver.h>
35 #include <asm/io.h>
36 #include <linux/delay.h>
37 #include <linux/interrupt.h>
38 #include <linux/init.h>
39 #include <linux/pci.h>
40 #include <linux/slab.h>
41 #include <linux/moduleparam.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/info.h>
46 #include <sound/ac97_codec.h>
47 #include <sound/initval.h>
48
49 #if 0
50 #define POINTER_DEBUG
51 #endif
52
53 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
54 MODULE_DESCRIPTION("VIA VT82xx modem");
55 MODULE_LICENSE("GPL");
56 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
57
58 static int index = -2; /* Exclude the first card */
59 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
60 static int ac97_clock = 48000;
61
62 module_param(index, int, 0444);
63 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
64 module_param(id, charp, 0444);
65 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
66 module_param(ac97_clock, int, 0444);
67 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
68
69 /* just for backward compatibility */
70 static int enable;
71 module_param(enable, bool, 0444);
72
73
74 /*
75  *  Direct registers
76  */
77
78 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
79 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
80
81 /* common offsets */
82 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
83 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
84 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
85 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
86 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
87 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
88 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
89 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
90 #define   VIA_REG_CTRL_START            0x80    /* WO */
91 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
92 #define   VIA_REG_CTRL_AUTOSTART        0x20
93 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
94 #define   VIA_REG_CTRL_INT_STOP         0x04            
95 #define   VIA_REG_CTRL_INT_EOL          0x02
96 #define   VIA_REG_CTRL_INT_FLAG         0x01
97 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
98 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
99 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
100 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
101 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
102 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
103 #define   VIA_REG_TYPE_INT_LLINE        0x00
104 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
105 #define   VIA_REG_TYPE_INT_LESSONE      0x08
106 #define   VIA_REG_TYPE_INT_MASK         0x0c
107 #define   VIA_REG_TYPE_INT_EOL          0x02
108 #define   VIA_REG_TYPE_INT_FLAG         0x01
109 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
110 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
111 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
112 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
113 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
114
115 #define DEFINE_VIA_REGSET(name,val) \
116 enum {\
117         VIA_REG_##name##_STATUS         = (val),\
118         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
119         VIA_REG_##name##_TYPE           = (val) + 0x02,\
120         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
121         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
122         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
123         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
124 }
125
126 /* modem block */
127 DEFINE_VIA_REGSET(MO, 0x40);
128 DEFINE_VIA_REGSET(MI, 0x50);
129
130 /* AC'97 */
131 #define VIA_REG_AC97                    0x80    /* dword */
132 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
133 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
134 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
135 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
136 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
137 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
138 #define   VIA_REG_AC97_BUSY             (1<<24)
139 #define   VIA_REG_AC97_READ             (1<<23)
140 #define   VIA_REG_AC97_CMD_SHIFT        16
141 #define   VIA_REG_AC97_CMD_MASK         0x7e
142 #define   VIA_REG_AC97_DATA_SHIFT       0
143 #define   VIA_REG_AC97_DATA_MASK        0xffff
144
145 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
146 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
147 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
148 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
149 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
150 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
151 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
152 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
153 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
154 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
155 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
156 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
157 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
158 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
159 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
160 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
161 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
162 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
163 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
164 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
165 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
166
167 #define VIA_REG_GPI_STATUS              0x88
168 #define VIA_REG_GPI_INTR                0x8c
169
170 #define VIA_TBL_BIT_FLAG        0x40000000
171 #define VIA_TBL_BIT_EOL         0x80000000
172
173 /* pci space */
174 #define VIA_ACLINK_STAT         0x40
175 #define  VIA_ACLINK_C11_READY   0x20
176 #define  VIA_ACLINK_C10_READY   0x10
177 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
178 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
179 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
180 #define VIA_ACLINK_CTRL         0x41
181 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
182 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
183 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
184 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
185 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
186 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
187 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
188 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
189 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
190                                  VIA_ACLINK_CTRL_RESET|\
191                                  VIA_ACLINK_CTRL_PCM)
192 #define VIA_FUNC_ENABLE         0x42
193 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
194 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
195 #define  VIA_FUNC_RX2C_WRITE    0x20
196 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
197 #define  VIA_FUNC_ENABLE_GAME   0x08
198 #define  VIA_FUNC_ENABLE_FM     0x04
199 #define  VIA_FUNC_ENABLE_MIDI   0x02
200 #define  VIA_FUNC_ENABLE_SB     0x01
201 #define VIA_PNP_CONTROL         0x43
202 #define VIA_MC97_CTRL           0x44
203 #define  VIA_MC97_CTRL_ENABLE   0x80
204 #define  VIA_MC97_CTRL_SECONDARY 0x40
205 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
206                                  VIA_MC97_CTRL_SECONDARY)
207
208
209 /*
210  * pcm stream
211  */
212
213 struct snd_via_sg_table {
214         unsigned int offset;
215         unsigned int size;
216 } ;
217
218 #define VIA_TABLE_SIZE  255
219
220 struct viadev {
221         unsigned int reg_offset;
222         unsigned long port;
223         int direction;  /* playback = 0, capture = 1 */
224         struct snd_pcm_substream *substream;
225         int running;
226         unsigned int tbl_entries; /* # descriptors */
227         struct snd_dma_buffer table;
228         struct snd_via_sg_table *idx_table;
229         /* for recovery from the unexpected pointer */
230         unsigned int lastpos;
231         unsigned int bufsize;
232         unsigned int bufsize2;
233 };
234
235 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
236
237 #define VIA_MAX_MODEM_DEVS      2
238
239 struct via82xx_modem {
240         int irq;
241
242         unsigned long port;
243
244         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
245
246         struct pci_dev *pci;
247         struct snd_card *card;
248
249         unsigned int num_devs;
250         unsigned int playback_devno, capture_devno;
251         struct viadev devs[VIA_MAX_MODEM_DEVS];
252
253         struct snd_pcm *pcms[2];
254
255         struct snd_ac97_bus *ac97_bus;
256         struct snd_ac97 *ac97;
257         unsigned int ac97_clock;
258         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
259
260         spinlock_t reg_lock;
261         struct snd_info_entry *proc_entry;
262 };
263
264 static struct pci_device_id snd_via82xx_modem_ids[] = {
265         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
266         { 0, }
267 };
268
269 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
270
271 /*
272  */
273
274 /*
275  * allocate and initialize the descriptor buffers
276  * periods = number of periods
277  * fragsize = period size in bytes
278  */
279 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
280                            struct pci_dev *pci,
281                            unsigned int periods, unsigned int fragsize)
282 {
283         unsigned int i, idx, ofs, rest;
284         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
285         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
286
287         if (dev->table.area == NULL) {
288                 /* the start of each lists must be aligned to 8 bytes,
289                  * but the kernel pages are much bigger, so we don't care
290                  */
291                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
292                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
293                                         &dev->table) < 0)
294                         return -ENOMEM;
295         }
296         if (! dev->idx_table) {
297                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
298                 if (! dev->idx_table)
299                         return -ENOMEM;
300         }
301
302         /* fill the entries */
303         idx = 0;
304         ofs = 0;
305         for (i = 0; i < periods; i++) {
306                 rest = fragsize;
307                 /* fill descriptors for a period.
308                  * a period can be split to several descriptors if it's
309                  * over page boundary.
310                  */
311                 do {
312                         unsigned int r;
313                         unsigned int flag;
314
315                         if (idx >= VIA_TABLE_SIZE) {
316                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
317                                 return -EINVAL;
318                         }
319                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
320                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
321                         if (rest < r)
322                                 r = rest;
323                         rest -= r;
324                         if (! rest) {
325                                 if (i == periods - 1)
326                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
327                                 else
328                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
329                         } else
330                                 flag = 0; /* period continues to the next */
331                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
332                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
333                         dev->idx_table[idx].offset = ofs;
334                         dev->idx_table[idx].size = r;
335                         ofs += r;
336                         idx++;
337                 } while (rest > 0);
338         }
339         dev->tbl_entries = idx;
340         dev->bufsize = periods * fragsize;
341         dev->bufsize2 = dev->bufsize / 2;
342         return 0;
343 }
344
345
346 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
347                            struct pci_dev *pci)
348 {
349         if (dev->table.area) {
350                 snd_dma_free_pages(&dev->table);
351                 dev->table.area = NULL;
352         }
353         kfree(dev->idx_table);
354         dev->idx_table = NULL;
355         return 0;
356 }
357
358 /*
359  *  Basic I/O
360  */
361
362 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
363 {
364         return inl(VIAREG(chip, AC97));
365 }
366  
367 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
368 {
369         outl(val, VIAREG(chip, AC97));
370 }
371  
372 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
373 {
374         unsigned int timeout = 1000;    /* 1ms */
375         unsigned int val;
376         
377         while (timeout-- > 0) {
378                 udelay(1);
379                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
380                         return val & 0xffff;
381         }
382         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n",
383                    secondary, snd_via82xx_codec_xread(chip));
384         return -EIO;
385 }
386  
387 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
388 {
389         unsigned int timeout = 1000;    /* 1ms */
390         unsigned int val, val1;
391         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
392                                          VIA_REG_AC97_SECONDARY_VALID;
393         
394         while (timeout-- > 0) {
395                 val = snd_via82xx_codec_xread(chip);
396                 val1 = val & (VIA_REG_AC97_BUSY | stat);
397                 if (val1 == stat)
398                         return val & 0xffff;
399                 udelay(1);
400         }
401         return -EIO;
402 }
403  
404 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
405 {
406         struct via82xx_modem *chip = ac97->private_data;
407         int err;
408         err = snd_via82xx_codec_ready(chip, ac97->num);
409         /* here we need to wait fairly for long time.. */
410         msleep(500);
411 }
412
413 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
414                                     unsigned short reg,
415                                     unsigned short val)
416 {
417         struct via82xx_modem *chip = ac97->private_data;
418         unsigned int xval;
419         if(reg == AC97_GPIO_STATUS) {
420                 outl(val, VIAREG(chip, GPI_STATUS));
421                 return;
422         }       
423         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
424         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
425         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
426         xval |= val << VIA_REG_AC97_DATA_SHIFT;
427         snd_via82xx_codec_xwrite(chip, xval);
428         snd_via82xx_codec_ready(chip, ac97->num);
429 }
430
431 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
432 {
433         struct via82xx_modem *chip = ac97->private_data;
434         unsigned int xval, val = 0xffff;
435         int again = 0;
436
437         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
438         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
439         xval |= VIA_REG_AC97_READ;
440         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
441         while (1) {
442                 if (again++ > 3) {
443                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n",
444                                    ac97->num, snd_via82xx_codec_xread(chip));
445                         return 0xffff;
446                 }
447                 snd_via82xx_codec_xwrite(chip, xval);
448                 udelay (20);
449                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
450                         udelay(25);
451                         val = snd_via82xx_codec_xread(chip);
452                         break;
453                 }
454         }
455         return val & 0xffff;
456 }
457
458 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
459 {
460         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
461              VIADEV_REG(viadev, OFFSET_CONTROL));
462         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
463         udelay(50);
464         /* disable interrupts */
465         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
466         /* clear interrupts */
467         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
468         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
469         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
470         viadev->lastpos = 0;
471 }
472
473
474 /*
475  *  Interrupt handler
476  */
477
478 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
479 {
480         struct via82xx_modem *chip = dev_id;
481         unsigned int status;
482         unsigned int i;
483
484         status = inl(VIAREG(chip, SGD_SHADOW));
485         if (! (status & chip->intr_mask)) {
486                 return IRQ_NONE;
487         }
488 // _skip_sgd:
489
490         /* check status for each stream */
491         spin_lock(&chip->reg_lock);
492         for (i = 0; i < chip->num_devs; i++) {
493                 struct viadev *viadev = &chip->devs[i];
494                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
495                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
496                 if (! c_status)
497                         continue;
498                 if (viadev->substream && viadev->running) {
499                         spin_unlock(&chip->reg_lock);
500                         snd_pcm_period_elapsed(viadev->substream);
501                         spin_lock(&chip->reg_lock);
502                 }
503                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
504         }
505         spin_unlock(&chip->reg_lock);
506         return IRQ_HANDLED;
507 }
508
509 /*
510  *  PCM callbacks
511  */
512
513 /*
514  * trigger callback
515  */
516 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
517 {
518         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
519         struct viadev *viadev = substream->runtime->private_data;
520         unsigned char val = 0;
521
522         switch (cmd) {
523         case SNDRV_PCM_TRIGGER_START:
524         case SNDRV_PCM_TRIGGER_SUSPEND:
525                 val |= VIA_REG_CTRL_START;
526                 viadev->running = 1;
527                 break;
528         case SNDRV_PCM_TRIGGER_STOP:
529                 val = VIA_REG_CTRL_TERMINATE;
530                 viadev->running = 0;
531                 break;
532         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
533                 val |= VIA_REG_CTRL_PAUSE;
534                 viadev->running = 0;
535                 break;
536         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
537                 viadev->running = 1;
538                 break;
539         default:
540                 return -EINVAL;
541         }
542         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
543         if (cmd == SNDRV_PCM_TRIGGER_STOP)
544                 snd_via82xx_channel_reset(chip, viadev);
545         return 0;
546 }
547
548 /*
549  * pointer callbacks
550  */
551
552 /*
553  * calculate the linear position at the given sg-buffer index and the rest count
554  */
555
556 #define check_invalid_pos(viadev,pos) \
557         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
558                                      viadev->lastpos < viadev->bufsize2))
559
560 static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx,
561                                            unsigned int count)
562 {
563         unsigned int size, res;
564
565         size = viadev->idx_table[idx].size;
566         res = viadev->idx_table[idx].offset + size - count;
567
568         /* check the validity of the calculated position */
569         if (size < count) {
570                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
571                            (int)size, (int)count);
572                 res = viadev->lastpos;
573         } else if (check_invalid_pos(viadev, res)) {
574 #ifdef POINTER_DEBUG
575                 printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, "
576                        "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
577                        "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos,
578                        viadev->bufsize2, viadev->idx_table[idx].offset,
579                        viadev->idx_table[idx].size, count);
580 #endif
581                 if (count && size < count) {
582                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, "
583                                    "using last valid pointer\n");
584                         res = viadev->lastpos;
585                 } else {
586                         if (! count)
587                                 /* bogus count 0 on the DMA boundary? */
588                                 res = viadev->idx_table[idx].offset;
589                         else
590                                 /* count register returns full size
591                                  * when end of buffer is reached
592                                  */
593                                 res = viadev->idx_table[idx].offset + size;
594                         if (check_invalid_pos(viadev, res)) {
595                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), "
596                                            "using last valid pointer\n");
597                                 res = viadev->lastpos;
598                         }
599                 }
600         }
601         viadev->lastpos = res; /* remember the last position */
602         if (res >= viadev->bufsize)
603                 res -= viadev->bufsize;
604         return res;
605 }
606
607 /*
608  * get the current pointer on via686
609  */
610 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
611 {
612         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
613         struct viadev *viadev = substream->runtime->private_data;
614         unsigned int idx, ptr, count, res;
615
616         snd_assert(viadev->tbl_entries, return 0);
617         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
618                 return 0;
619
620         spin_lock(&chip->reg_lock);
621         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
622         /* The via686a does not have the current index register,
623          * so we need to calculate the index from CURR_PTR.
624          */
625         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
626         if (ptr <= (unsigned int)viadev->table.addr)
627                 idx = 0;
628         else /* CURR_PTR holds the address + 8 */
629                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
630                         viadev->tbl_entries;
631         res = calc_linear_pos(viadev, idx, count);
632         spin_unlock(&chip->reg_lock);
633
634         return bytes_to_frames(substream->runtime, res);
635 }
636
637 /*
638  * hw_params callback:
639  * allocate the buffer and build up the buffer description table
640  */
641 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
642                                  struct snd_pcm_hw_params *hw_params)
643 {
644         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
645         struct viadev *viadev = substream->runtime->private_data;
646         int err;
647
648         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
649         if (err < 0)
650                 return err;
651         err = build_via_table(viadev, substream, chip->pci,
652                               params_periods(hw_params),
653                               params_period_bytes(hw_params));
654         if (err < 0)
655                 return err;
656
657         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
658         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
659
660         return 0;
661 }
662
663 /*
664  * hw_free callback:
665  * clean up the buffer description table and release the buffer
666  */
667 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
668 {
669         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
670         struct viadev *viadev = substream->runtime->private_data;
671
672         clean_via_table(viadev, substream, chip->pci);
673         snd_pcm_lib_free_pages(substream);
674         return 0;
675 }
676
677
678 /*
679  * set up the table pointer
680  */
681 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
682 {
683         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
684         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
685         udelay(20);
686         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
687 }
688
689 /*
690  * prepare callback for playback and capture
691  */
692 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
693 {
694         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
695         struct viadev *viadev = substream->runtime->private_data;
696
697         snd_via82xx_channel_reset(chip, viadev);
698         /* this must be set after channel_reset */
699         snd_via82xx_set_table_ptr(chip, viadev);
700         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
701              VIADEV_REG(viadev, OFFSET_TYPE));
702         return 0;
703 }
704
705 /*
706  * pcm hardware definition, identical for both playback and capture
707  */
708 static struct snd_pcm_hardware snd_via82xx_hw =
709 {
710         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
711                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
712                                  SNDRV_PCM_INFO_MMAP_VALID |
713                                  /* SNDRV_PCM_INFO_RESUME | */
714                                  SNDRV_PCM_INFO_PAUSE),
715         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
716         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
717         .rate_min =             8000,
718         .rate_max =             16000,
719         .channels_min =         1,
720         .channels_max =         1,
721         .buffer_bytes_max =     128 * 1024,
722         .period_bytes_min =     32,
723         .period_bytes_max =     128 * 1024,
724         .periods_min =          2,
725         .periods_max =          VIA_TABLE_SIZE / 2,
726         .fifo_size =            0,
727 };
728
729
730 /*
731  * open callback skeleton
732  */
733 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
734                                       struct snd_pcm_substream *substream)
735 {
736         struct snd_pcm_runtime *runtime = substream->runtime;
737         int err;
738         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
739         static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
740                 .count = ARRAY_SIZE(rates),
741                 .list = rates,
742                 .mask = 0,
743         };
744
745         runtime->hw = snd_via82xx_hw;
746         
747         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
748                                               &hw_constraints_rates)) < 0)
749                 return err;
750
751         /* we may remove following constaint when we modify table entries
752            in interrupt */
753         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
754                 return err;
755
756         runtime->private_data = viadev;
757         viadev->substream = substream;
758
759         return 0;
760 }
761
762
763 /*
764  * open callback for playback
765  */
766 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
767 {
768         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
769         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
770
771         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
772 }
773
774 /*
775  * open callback for capture
776  */
777 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
778 {
779         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
780         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
781
782         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
783 }
784
785 /*
786  * close callback
787  */
788 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
789 {
790         struct viadev *viadev = substream->runtime->private_data;
791
792         viadev->substream = NULL;
793         return 0;
794 }
795
796
797 /* via686 playback callbacks */
798 static struct snd_pcm_ops snd_via686_playback_ops = {
799         .open =         snd_via82xx_playback_open,
800         .close =        snd_via82xx_pcm_close,
801         .ioctl =        snd_pcm_lib_ioctl,
802         .hw_params =    snd_via82xx_hw_params,
803         .hw_free =      snd_via82xx_hw_free,
804         .prepare =      snd_via82xx_pcm_prepare,
805         .trigger =      snd_via82xx_pcm_trigger,
806         .pointer =      snd_via686_pcm_pointer,
807         .page =         snd_pcm_sgbuf_ops_page,
808 };
809
810 /* via686 capture callbacks */
811 static struct snd_pcm_ops snd_via686_capture_ops = {
812         .open =         snd_via82xx_capture_open,
813         .close =        snd_via82xx_pcm_close,
814         .ioctl =        snd_pcm_lib_ioctl,
815         .hw_params =    snd_via82xx_hw_params,
816         .hw_free =      snd_via82xx_hw_free,
817         .prepare =      snd_via82xx_pcm_prepare,
818         .trigger =      snd_via82xx_pcm_trigger,
819         .pointer =      snd_via686_pcm_pointer,
820         .page =         snd_pcm_sgbuf_ops_page,
821 };
822
823
824 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
825                         int direction)
826 {
827         chip->devs[idx].reg_offset = reg_offset;
828         chip->devs[idx].direction = direction;
829         chip->devs[idx].port = chip->port + reg_offset;
830 }
831
832 /*
833  * create a pcm instance for via686a/b
834  */
835 static int __devinit snd_via686_pcm_new(struct via82xx_modem *chip)
836 {
837         struct snd_pcm *pcm;
838         int err;
839
840         chip->playback_devno = 0;
841         chip->capture_devno = 1;
842         chip->num_devs = 2;
843         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
844
845         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
846         if (err < 0)
847                 return err;
848         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
849         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
850         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
851         pcm->private_data = chip;
852         strcpy(pcm->name, chip->card->shortname);
853         chip->pcms[0] = pcm;
854         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
855         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
856
857         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
858                                                          snd_dma_pci_data(chip->pci),
859                                                          64*1024, 128*1024)) < 0)
860                 return err;
861
862         return 0;
863 }
864
865
866 /*
867  *  Mixer part
868  */
869
870
871 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
872 {
873         struct via82xx_modem *chip = bus->private_data;
874         chip->ac97_bus = NULL;
875 }
876
877 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
878 {
879         struct via82xx_modem *chip = ac97->private_data;
880         chip->ac97 = NULL;
881 }
882
883
884 static int __devinit snd_via82xx_mixer_new(struct via82xx_modem *chip)
885 {
886         struct snd_ac97_template ac97;
887         int err;
888         static struct snd_ac97_bus_ops ops = {
889                 .write = snd_via82xx_codec_write,
890                 .read = snd_via82xx_codec_read,
891                 .wait = snd_via82xx_codec_wait,
892         };
893
894         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
895                 return err;
896         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
897         chip->ac97_bus->clock = chip->ac97_clock;
898
899         memset(&ac97, 0, sizeof(ac97));
900         ac97.private_data = chip;
901         ac97.private_free = snd_via82xx_mixer_free_ac97;
902         ac97.pci = chip->pci;
903         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
904         ac97.num = chip->ac97_secondary;
905
906         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
907                 return err;
908
909         return 0;
910 }
911
912
913 /*
914  * proc interface
915  */
916 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
917 {
918         struct via82xx_modem *chip = entry->private_data;
919         int i;
920         
921         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
922         for (i = 0; i < 0xa0; i += 4) {
923                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
924         }
925 }
926
927 static void __devinit snd_via82xx_proc_init(struct via82xx_modem *chip)
928 {
929         struct snd_info_entry *entry;
930
931         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
932                 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
933 }
934
935 /*
936  *
937  */
938
939 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
940 {
941         unsigned int val;
942         unsigned long end_time;
943         unsigned char pval;
944
945         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
946         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
947                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
948                 udelay(100);
949         }
950
951         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
952         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
953                 /* deassert ACLink reset, force SYNC */
954                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
955                                       VIA_ACLINK_CTRL_ENABLE |
956                                       VIA_ACLINK_CTRL_RESET |
957                                       VIA_ACLINK_CTRL_SYNC);
958                 udelay(100);
959 #if 1 /* FIXME: should we do full reset here for all chip models? */
960                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
961                 udelay(100);
962 #else
963                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
964                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
965                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
966                 udelay(2);
967 #endif
968                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
969                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
970                 udelay(100);
971         }
972         
973         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
974         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
975                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
976                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
977                 udelay(100);
978         }
979
980         /* wait until codec ready */
981         end_time = jiffies + msecs_to_jiffies(750);
982         do {
983                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
984                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
985                         break;
986                 schedule_timeout_uninterruptible(1);
987         } while (time_before(jiffies, end_time));
988
989         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
990                 snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
991
992         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
993                                  VIA_REG_AC97_SECONDARY_VALID |
994                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
995         end_time = jiffies + msecs_to_jiffies(750);
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         do {
1000                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1001                         chip->ac97_secondary = 1;
1002                         goto __ac97_ok2;
1003                 }
1004                 schedule_timeout_uninterruptible(1);
1005         } while (time_before(jiffies, end_time));
1006         /* This is ok, the most of motherboards have only one codec */
1007
1008       __ac97_ok2:
1009
1010         /* route FM trap to IRQ, disable FM trap */
1011         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1012         /* disable all GPI interrupts */
1013         outl(0, VIAREG(chip, GPI_INTR));
1014
1015         return 0;
1016 }
1017
1018 #ifdef CONFIG_PM
1019 /*
1020  * power management
1021  */
1022 static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state)
1023 {
1024         struct snd_card *card = pci_get_drvdata(pci);
1025         struct via82xx_modem *chip = card->private_data;
1026         int i;
1027
1028         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1029         for (i = 0; i < 2; i++)
1030                 snd_pcm_suspend_all(chip->pcms[i]);
1031         for (i = 0; i < chip->num_devs; i++)
1032                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1033         synchronize_irq(chip->irq);
1034         snd_ac97_suspend(chip->ac97);
1035
1036         pci_disable_device(pci);
1037         pci_save_state(pci);
1038         pci_set_power_state(pci, pci_choose_state(pci, state));
1039         return 0;
1040 }
1041
1042 static int snd_via82xx_resume(struct pci_dev *pci)
1043 {
1044         struct snd_card *card = pci_get_drvdata(pci);
1045         struct via82xx_modem *chip = card->private_data;
1046         int i;
1047
1048         pci_set_power_state(pci, PCI_D0);
1049         pci_restore_state(pci);
1050         if (pci_enable_device(pci) < 0) {
1051                 printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1052                        "disabling device\n");
1053                 snd_card_disconnect(card);
1054                 return -EIO;
1055         }
1056         pci_set_master(pci);
1057
1058         snd_via82xx_chip_init(chip);
1059
1060         snd_ac97_resume(chip->ac97);
1061
1062         for (i = 0; i < chip->num_devs; i++)
1063                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1064
1065         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1066         return 0;
1067 }
1068 #endif /* CONFIG_PM */
1069
1070 static int snd_via82xx_free(struct via82xx_modem *chip)
1071 {
1072         unsigned int i;
1073
1074         if (chip->irq < 0)
1075                 goto __end_hw;
1076         /* disable interrupts */
1077         for (i = 0; i < chip->num_devs; i++)
1078                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1079         synchronize_irq(chip->irq);
1080       __end_hw:
1081         if (chip->irq >= 0)
1082                 free_irq(chip->irq, chip);
1083         pci_release_regions(chip->pci);
1084         pci_disable_device(chip->pci);
1085         kfree(chip);
1086         return 0;
1087 }
1088
1089 static int snd_via82xx_dev_free(struct snd_device *device)
1090 {
1091         struct via82xx_modem *chip = device->device_data;
1092         return snd_via82xx_free(chip);
1093 }
1094
1095 static int __devinit snd_via82xx_create(struct snd_card *card,
1096                                         struct pci_dev *pci,
1097                                         int chip_type,
1098                                         int revision,
1099                                         unsigned int ac97_clock,
1100                                         struct via82xx_modem ** r_via)
1101 {
1102         struct via82xx_modem *chip;
1103         int err;
1104         static struct snd_device_ops ops = {
1105                 .dev_free =     snd_via82xx_dev_free,
1106         };
1107
1108         if ((err = pci_enable_device(pci)) < 0)
1109                 return err;
1110
1111         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1112                 pci_disable_device(pci);
1113                 return -ENOMEM;
1114         }
1115
1116         spin_lock_init(&chip->reg_lock);
1117         chip->card = card;
1118         chip->pci = pci;
1119         chip->irq = -1;
1120
1121         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1122                 kfree(chip);
1123                 pci_disable_device(pci);
1124                 return err;
1125         }
1126         chip->port = pci_resource_start(pci, 0);
1127         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1128                         card->driver, chip)) {
1129                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1130                 snd_via82xx_free(chip);
1131                 return -EBUSY;
1132         }
1133         chip->irq = pci->irq;
1134         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1135                 chip->ac97_clock = ac97_clock;
1136         synchronize_irq(chip->irq);
1137
1138         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1139                 snd_via82xx_free(chip);
1140                 return err;
1141         }
1142
1143         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1144                 snd_via82xx_free(chip);
1145                 return err;
1146         }
1147
1148         /* The 8233 ac97 controller does not implement the master bit
1149          * in the pci command register. IMHO this is a violation of the PCI spec.
1150          * We call pci_set_master here because it does not hurt. */
1151         pci_set_master(pci);
1152
1153         snd_card_set_dev(card, &pci->dev);
1154
1155         *r_via = chip;
1156         return 0;
1157 }
1158
1159
1160 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1161                                        const struct pci_device_id *pci_id)
1162 {
1163         struct snd_card *card;
1164         struct via82xx_modem *chip;
1165         int chip_type = 0, card_type;
1166         unsigned int i;
1167         int err;
1168
1169         card = snd_card_new(index, id, THIS_MODULE, 0);
1170         if (card == NULL)
1171                 return -ENOMEM;
1172
1173         card_type = pci_id->driver_data;
1174         switch (card_type) {
1175         case TYPE_CARD_VIA82XX_MODEM:
1176                 strcpy(card->driver, "VIA82XX-MODEM");
1177                 sprintf(card->shortname, "VIA 82XX modem");
1178                 break;
1179         default:
1180                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1181                 err = -EINVAL;
1182                 goto __error;
1183         }
1184                 
1185         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1186                                       ac97_clock, &chip)) < 0)
1187                 goto __error;
1188         card->private_data = chip;
1189         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1190                 goto __error;
1191
1192         if ((err = snd_via686_pcm_new(chip)) < 0 )
1193                 goto __error;
1194
1195         /* disable interrupts */
1196         for (i = 0; i < chip->num_devs; i++)
1197                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1198
1199         sprintf(card->longname, "%s at 0x%lx, irq %d",
1200                 card->shortname, chip->port, chip->irq);
1201
1202         snd_via82xx_proc_init(chip);
1203
1204         if ((err = snd_card_register(card)) < 0) {
1205                 snd_card_free(card);
1206                 return err;
1207         }
1208         pci_set_drvdata(pci, card);
1209         return 0;
1210
1211  __error:
1212         snd_card_free(card);
1213         return err;
1214 }
1215
1216 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1217 {
1218         snd_card_free(pci_get_drvdata(pci));
1219         pci_set_drvdata(pci, NULL);
1220 }
1221
1222 static struct pci_driver driver = {
1223         .name = "VIA 82xx Modem",
1224         .id_table = snd_via82xx_modem_ids,
1225         .probe = snd_via82xx_probe,
1226         .remove = __devexit_p(snd_via82xx_remove),
1227 #ifdef CONFIG_PM
1228         .suspend = snd_via82xx_suspend,
1229         .resume = snd_via82xx_resume,
1230 #endif
1231 };
1232
1233 static int __init alsa_card_via82xx_init(void)
1234 {
1235         return pci_register_driver(&driver);
1236 }
1237
1238 static void __exit alsa_card_via82xx_exit(void)
1239 {
1240         pci_unregister_driver(&driver);
1241 }
1242
1243 module_init(alsa_card_via82xx_init)
1244 module_exit(alsa_card_via82xx_exit)