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