Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/sound/pci/via82xx_modem.c

  1 /*
  2  *   ALSA modem driver for VIA VT82xx (South Bridge)
  3  *
  4  *   VT82C686A/B/C, VT8233A/C, VT8235
  5  *
  6  *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
  7  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
  8  *                    2002 Takashi Iwai <tiwai@suse.de>
  9  *
 10  *   This program is free software; you can redistribute it and/or modify
 11  *   it under the terms of the GNU General Public License as published by
 12  *   the Free Software Foundation; either version 2 of the License, or
 13  *   (at your option) any later version.
 14  *
 15  *   This program is distributed in the hope that it will be useful,
 16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  *   GNU General Public License for more details.
 19  *
 20  *   You should have received a copy of the GNU General Public License
 21  *   along with this program; if not, write to the Free Software
 22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 23  *
 24  */
 25 
 26 /*
 27  * Changes:
 28  *
 29  * Sep. 2,  2004  Sasha Khapyorsky <sashak@alsa-project.org>
 30  *      Modified from original audio driver 'via82xx.c' to support AC97
 31  *      modems.
 32  */
 33 
 34 #include <asm/io.h>
 35 #include <linux/delay.h>
 36 #include <linux/interrupt.h>
 37 #include <linux/init.h>
 38 #include <linux/pci.h>
 39 #include <linux/slab.h>
 40 #include <linux/module.h>
 41 #include <sound/core.h>
 42 #include <sound/pcm.h>
 43 #include <sound/pcm_params.h>
 44 #include <sound/info.h>
 45 #include <sound/ac97_codec.h>
 46 #include <sound/initval.h>
 47 
 48 #if 0
 49 #define POINTER_DEBUG
 50 #endif
 51 
 52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 53 MODULE_DESCRIPTION("VIA VT82xx modem");
 54 MODULE_LICENSE("GPL");
 55 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
 56 
 57 static int index = -2; /* Exclude the first card */
 58 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
 59 static int ac97_clock = 48000;
 60 
 61 module_param(index, int, 0444);
 62 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
 63 module_param(id, charp, 0444);
 64 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
 65 module_param(ac97_clock, int, 0444);
 66 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
 67 
 68 /* just for backward compatibility */
 69 static bool enable;
 70 module_param(enable, bool, 0444);
 71 
 72 
 73 /*
 74  *  Direct registers
 75  */
 76 
 77 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
 78 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
 79 
 80 /* common offsets */
 81 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
 82 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
 83 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
 84 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
 85 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
 86 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
 87 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
 88 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
 89 #define   VIA_REG_CTRL_START            0x80    /* WO */
 90 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
 91 #define   VIA_REG_CTRL_AUTOSTART        0x20
 92 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
 93 #define   VIA_REG_CTRL_INT_STOP         0x04            
 94 #define   VIA_REG_CTRL_INT_EOL          0x02
 95 #define   VIA_REG_CTRL_INT_FLAG         0x01
 96 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
 97 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
 98 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
 99 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
100 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
101 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
102 #define   VIA_REG_TYPE_INT_LLINE        0x00
103 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
104 #define   VIA_REG_TYPE_INT_LESSONE      0x08
105 #define   VIA_REG_TYPE_INT_MASK         0x0c
106 #define   VIA_REG_TYPE_INT_EOL          0x02
107 #define   VIA_REG_TYPE_INT_FLAG         0x01
108 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
109 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
110 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
111 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
112 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
113 
114 #define DEFINE_VIA_REGSET(name,val) \
115 enum {\
116         VIA_REG_##name##_STATUS         = (val),\
117         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
118         VIA_REG_##name##_TYPE           = (val) + 0x02,\
119         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
120         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
121         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
122         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
123 }
124 
125 /* modem block */
126 DEFINE_VIA_REGSET(MO, 0x40);
127 DEFINE_VIA_REGSET(MI, 0x50);
128 
129 /* AC'97 */
130 #define VIA_REG_AC97                    0x80    /* dword */
131 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
132 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
133 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
134 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
135 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
136 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
137 #define   VIA_REG_AC97_BUSY             (1<<24)
138 #define   VIA_REG_AC97_READ             (1<<23)
139 #define   VIA_REG_AC97_CMD_SHIFT        16
140 #define   VIA_REG_AC97_CMD_MASK         0x7e
141 #define   VIA_REG_AC97_DATA_SHIFT       0
142 #define   VIA_REG_AC97_DATA_MASK        0xffff
143 
144 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
145 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
146 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
147 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
148 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
149 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
150 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
151 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
152 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
153 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
154 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
155 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
156 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
157 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
158 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
159 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
160 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
161 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
162 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
163 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
164 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
165 
166 #define VIA_REG_GPI_STATUS              0x88
167 #define VIA_REG_GPI_INTR                0x8c
168 
169 #define VIA_TBL_BIT_FLAG        0x40000000
170 #define VIA_TBL_BIT_EOL         0x80000000
171 
172 /* pci space */
173 #define VIA_ACLINK_STAT         0x40
174 #define  VIA_ACLINK_C11_READY   0x20
175 #define  VIA_ACLINK_C10_READY   0x10
176 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
177 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
178 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
179 #define VIA_ACLINK_CTRL         0x41
180 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
181 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
182 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
183 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
184 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
185 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
186 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
187 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
188 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
189                                  VIA_ACLINK_CTRL_RESET|\
190                                  VIA_ACLINK_CTRL_PCM)
191 #define VIA_FUNC_ENABLE         0x42
192 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
193 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
194 #define  VIA_FUNC_RX2C_WRITE    0x20
195 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
196 #define  VIA_FUNC_ENABLE_GAME   0x08
197 #define  VIA_FUNC_ENABLE_FM     0x04
198 #define  VIA_FUNC_ENABLE_MIDI   0x02
199 #define  VIA_FUNC_ENABLE_SB     0x01
200 #define VIA_PNP_CONTROL         0x43
201 #define VIA_MC97_CTRL           0x44
202 #define  VIA_MC97_CTRL_ENABLE   0x80
203 #define  VIA_MC97_CTRL_SECONDARY 0x40
204 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
205                                  VIA_MC97_CTRL_SECONDARY)
206 
207 
208 /*
209  * pcm stream
210  */
211 
212 struct snd_via_sg_table {
213         unsigned int offset;
214         unsigned int size;
215 } ;
216 
217 #define VIA_TABLE_SIZE  255
218 
219 struct viadev {
220         unsigned int reg_offset;
221         unsigned long port;
222         int direction;  /* playback = 0, capture = 1 */
223         struct snd_pcm_substream *substream;
224         int running;
225         unsigned int tbl_entries; /* # descriptors */
226         struct snd_dma_buffer table;
227         struct snd_via_sg_table *idx_table;
228         /* for recovery from the unexpected pointer */
229         unsigned int lastpos;
230         unsigned int bufsize;
231         unsigned int bufsize2;
232 };
233 
234 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
235 
236 #define VIA_MAX_MODEM_DEVS      2
237 
238 struct via82xx_modem {
239         int irq;
240 
241         unsigned long port;
242 
243         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
244 
245         struct pci_dev *pci;
246         struct snd_card *card;
247 
248         unsigned int num_devs;
249         unsigned int playback_devno, capture_devno;
250         struct viadev devs[VIA_MAX_MODEM_DEVS];
251 
252         struct snd_pcm *pcms[2];
253 
254         struct snd_ac97_bus *ac97_bus;
255         struct snd_ac97 *ac97;
256         unsigned int ac97_clock;
257         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
258 
259         spinlock_t reg_lock;
260         struct snd_info_entry *proc_entry;
261 };
262 
263 static DEFINE_PCI_DEVICE_TABLE(snd_via82xx_modem_ids) = {
264         { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
265         { 0, }
266 };
267 
268 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
269 
270 /*
271  */
272 
273 /*
274  * allocate and initialize the descriptor buffers
275  * periods = number of periods
276  * fragsize = period size in bytes
277  */
278 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
279                            struct pci_dev *pci,
280                            unsigned int periods, unsigned int fragsize)
281 {
282         unsigned int i, idx, ofs, rest;
283         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
284 
285         if (dev->table.area == NULL) {
286                 /* the start of each lists must be aligned to 8 bytes,
287                  * but the kernel pages are much bigger, so we don't care
288                  */
289                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
290                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
291                                         &dev->table) < 0)
292                         return -ENOMEM;
293         }
294         if (! dev->idx_table) {
295                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
296                 if (! dev->idx_table)
297                         return -ENOMEM;
298         }
299 
300         /* fill the entries */
301         idx = 0;
302         ofs = 0;
303         for (i = 0; i < periods; i++) {
304                 rest = fragsize;
305                 /* fill descriptors for a period.
306                  * a period can be split to several descriptors if it's
307                  * over page boundary.
308                  */
309                 do {
310                         unsigned int r;
311                         unsigned int flag;
312                         unsigned int addr;
313 
314                         if (idx >= VIA_TABLE_SIZE) {
315                                 dev_err(&pci->dev, "too much table size!\n");
316                                 return -EINVAL;
317                         }
318                         addr = snd_pcm_sgbuf_get_addr(substream, ofs);
319                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
320                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
321                         if (rest < r)
322                                 r = rest;
323                         rest -= r;
324                         if (! rest) {
325                                 if (i == periods - 1)
326                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
327                                 else
328                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
329                         } else
330                                 flag = 0; /* period continues to the next */
331                         /*
332                         dev_dbg(&pci->dev,
333                                 "tbl %d: at %d  size %d (rest %d)\n",
334                                 idx, ofs, r, rest);
335                         */
336                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
337                         dev->idx_table[idx].offset = ofs;
338                         dev->idx_table[idx].size = r;
339                         ofs += r;
340                         idx++;
341                 } while (rest > 0);
342         }
343         dev->tbl_entries = idx;
344         dev->bufsize = periods * fragsize;
345         dev->bufsize2 = dev->bufsize / 2;
346         return 0;
347 }
348 
349 
350 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
351                            struct pci_dev *pci)
352 {
353         if (dev->table.area) {
354                 snd_dma_free_pages(&dev->table);
355                 dev->table.area = NULL;
356         }
357         kfree(dev->idx_table);
358         dev->idx_table = NULL;
359         return 0;
360 }
361 
362 /*
363  *  Basic I/O
364  */
365 
366 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
367 {
368         return inl(VIAREG(chip, AC97));
369 }
370  
371 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
372 {
373         outl(val, VIAREG(chip, AC97));
374 }
375  
376 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
377 {
378         unsigned int timeout = 1000;    /* 1ms */
379         unsigned int val;
380         
381         while (timeout-- > 0) {
382                 udelay(1);
383                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
384                         return val & 0xffff;
385         }
386         dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
387                    secondary, snd_via82xx_codec_xread(chip));
388         return -EIO;
389 }
390  
391 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
392 {
393         unsigned int timeout = 1000;    /* 1ms */
394         unsigned int val, val1;
395         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
396                                          VIA_REG_AC97_SECONDARY_VALID;
397         
398         while (timeout-- > 0) {
399                 val = snd_via82xx_codec_xread(chip);
400                 val1 = val & (VIA_REG_AC97_BUSY | stat);
401                 if (val1 == stat)
402                         return val & 0xffff;
403                 udelay(1);
404         }
405         return -EIO;
406 }
407  
408 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
409 {
410         struct via82xx_modem *chip = ac97->private_data;
411         int err;
412         err = snd_via82xx_codec_ready(chip, ac97->num);
413         /* here we need to wait fairly for long time.. */
414         msleep(500);
415 }
416 
417 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
418                                     unsigned short reg,
419                                     unsigned short val)
420 {
421         struct via82xx_modem *chip = ac97->private_data;
422         unsigned int xval;
423         if(reg == AC97_GPIO_STATUS) {
424                 outl(val, VIAREG(chip, GPI_STATUS));
425                 return;
426         }       
427         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
428         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
429         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
430         xval |= val << VIA_REG_AC97_DATA_SHIFT;
431         snd_via82xx_codec_xwrite(chip, xval);
432         snd_via82xx_codec_ready(chip, ac97->num);
433 }
434 
435 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
436 {
437         struct via82xx_modem *chip = ac97->private_data;
438         unsigned int xval, val = 0xffff;
439         int again = 0;
440 
441         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
442         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
443         xval |= VIA_REG_AC97_READ;
444         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
445         while (1) {
446                 if (again++ > 3) {
447                         dev_err(chip->card->dev,
448                                 "codec_read: codec %i is not valid [0x%x]\n",
449                                    ac97->num, snd_via82xx_codec_xread(chip));
450                         return 0xffff;
451                 }
452                 snd_via82xx_codec_xwrite(chip, xval);
453                 udelay (20);
454                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
455                         udelay(25);
456                         val = snd_via82xx_codec_xread(chip);
457                         break;
458                 }
459         }
460         return val & 0xffff;
461 }
462 
463 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
464 {
465         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
466              VIADEV_REG(viadev, OFFSET_CONTROL));
467         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
468         udelay(50);
469         /* disable interrupts */
470         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
471         /* clear interrupts */
472         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
473         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
474         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
475         viadev->lastpos = 0;
476 }
477 
478 
479 /*
480  *  Interrupt handler
481  */
482 
483 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
484 {
485         struct via82xx_modem *chip = dev_id;
486         unsigned int status;
487         unsigned int i;
488 
489         status = inl(VIAREG(chip, SGD_SHADOW));
490         if (! (status & chip->intr_mask)) {
491                 return IRQ_NONE;
492         }
493 // _skip_sgd:
494 
495         /* check status for each stream */
496         spin_lock(&chip->reg_lock);
497         for (i = 0; i < chip->num_devs; i++) {
498                 struct viadev *viadev = &chip->devs[i];
499                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
500                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
501                 if (! c_status)
502                         continue;
503                 if (viadev->substream && viadev->running) {
504                         spin_unlock(&chip->reg_lock);
505                         snd_pcm_period_elapsed(viadev->substream);
506                         spin_lock(&chip->reg_lock);
507                 }
508                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
509         }
510         spin_unlock(&chip->reg_lock);
511         return IRQ_HANDLED;
512 }
513 
514 /*
515  *  PCM callbacks
516  */
517 
518 /*
519  * trigger callback
520  */
521 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
522 {
523         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
524         struct viadev *viadev = substream->runtime->private_data;
525         unsigned char val = 0;
526 
527         switch (cmd) {
528         case SNDRV_PCM_TRIGGER_START:
529         case SNDRV_PCM_TRIGGER_SUSPEND:
530                 val |= VIA_REG_CTRL_START;
531                 viadev->running = 1;
532                 break;
533         case SNDRV_PCM_TRIGGER_STOP:
534                 val = VIA_REG_CTRL_TERMINATE;
535                 viadev->running = 0;
536                 break;
537         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
538                 val |= VIA_REG_CTRL_PAUSE;
539                 viadev->running = 0;
540                 break;
541         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
542                 viadev->running = 1;
543                 break;
544         default:
545                 return -EINVAL;
546         }
547         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
548         if (cmd == SNDRV_PCM_TRIGGER_STOP)
549                 snd_via82xx_channel_reset(chip, viadev);
550         return 0;
551 }
552 
553 /*
554  * pointer callbacks
555  */
556 
557 /*
558  * calculate the linear position at the given sg-buffer index and the rest count
559  */
560 
561 #define check_invalid_pos(viadev,pos) \
562         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
563                                      viadev->lastpos < viadev->bufsize2))
564 
565 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
566                                            struct viadev *viadev,
567                                            unsigned int idx,
568                                            unsigned int count)
569 {
570         unsigned int size, res;
571 
572         size = viadev->idx_table[idx].size;
573         res = viadev->idx_table[idx].offset + size - count;
574 
575         /* check the validity of the calculated position */
576         if (size < count) {
577                 dev_err(chip->card->dev,
578                         "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
579                            (int)size, (int)count);
580                 res = viadev->lastpos;
581         } else if (check_invalid_pos(viadev, res)) {
582 #ifdef POINTER_DEBUG
583                 dev_dbg(chip->card->dev,
584                         "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
585                         idx, viadev->tbl_entries, viadev->lastpos,
586                        viadev->bufsize2, viadev->idx_table[idx].offset,
587                        viadev->idx_table[idx].size, count);
588 #endif
589                 if (count && size < count) {
590                         dev_dbg(chip->card->dev,
591                                 "invalid via82xx_cur_ptr, using last valid pointer\n");
592                         res = viadev->lastpos;
593                 } else {
594                         if (! count)
595                                 /* bogus count 0 on the DMA boundary? */
596                                 res = viadev->idx_table[idx].offset;
597                         else
598                                 /* count register returns full size
599                                  * when end of buffer is reached
600                                  */
601                                 res = viadev->idx_table[idx].offset + size;
602                         if (check_invalid_pos(viadev, res)) {
603                                 dev_dbg(chip->card->dev,
604                                         "invalid via82xx_cur_ptr (2), using last valid pointer\n");
605                                 res = viadev->lastpos;
606                         }
607                 }
608         }
609         viadev->lastpos = res; /* remember the last position */
610         if (res >= viadev->bufsize)
611                 res -= viadev->bufsize;
612         return res;
613 }
614 
615 /*
616  * get the current pointer on via686
617  */
618 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
619 {
620         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
621         struct viadev *viadev = substream->runtime->private_data;
622         unsigned int idx, ptr, count, res;
623 
624         if (snd_BUG_ON(!viadev->tbl_entries))
625                 return 0;
626         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
627                 return 0;
628 
629         spin_lock(&chip->reg_lock);
630         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
631         /* The via686a does not have the current index register,
632          * so we need to calculate the index from CURR_PTR.
633          */
634         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
635         if (ptr <= (unsigned int)viadev->table.addr)
636                 idx = 0;
637         else /* CURR_PTR holds the address + 8 */
638                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
639                         viadev->tbl_entries;
640         res = calc_linear_pos(chip, viadev, idx, count);
641         spin_unlock(&chip->reg_lock);
642 
643         return bytes_to_frames(substream->runtime, res);
644 }
645 
646 /*
647  * hw_params callback:
648  * allocate the buffer and build up the buffer description table
649  */
650 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
651                                  struct snd_pcm_hw_params *hw_params)
652 {
653         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
654         struct viadev *viadev = substream->runtime->private_data;
655         int err;
656 
657         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
658         if (err < 0)
659                 return err;
660         err = build_via_table(viadev, substream, chip->pci,
661                               params_periods(hw_params),
662                               params_period_bytes(hw_params));
663         if (err < 0)
664                 return err;
665 
666         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
667         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
668 
669         return 0;
670 }
671 
672 /*
673  * hw_free callback:
674  * clean up the buffer description table and release the buffer
675  */
676 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
677 {
678         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
679         struct viadev *viadev = substream->runtime->private_data;
680 
681         clean_via_table(viadev, substream, chip->pci);
682         snd_pcm_lib_free_pages(substream);
683         return 0;
684 }
685 
686 
687 /*
688  * set up the table pointer
689  */
690 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
691 {
692         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
693         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
694         udelay(20);
695         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
696 }
697 
698 /*
699  * prepare callback for playback and capture
700  */
701 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
702 {
703         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
704         struct viadev *viadev = substream->runtime->private_data;
705 
706         snd_via82xx_channel_reset(chip, viadev);
707         /* this must be set after channel_reset */
708         snd_via82xx_set_table_ptr(chip, viadev);
709         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
710              VIADEV_REG(viadev, OFFSET_TYPE));
711         return 0;
712 }
713 
714 /*
715  * pcm hardware definition, identical for both playback and capture
716  */
717 static struct snd_pcm_hardware snd_via82xx_hw =
718 {
719         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
720                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
721                                  SNDRV_PCM_INFO_MMAP_VALID |
722                                  /* SNDRV_PCM_INFO_RESUME | */
723                                  SNDRV_PCM_INFO_PAUSE),
724         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
725         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
726         .rate_min =             8000,
727         .rate_max =             16000,
728         .channels_min =         1,
729         .channels_max =         1,
730         .buffer_bytes_max =     128 * 1024,
731         .period_bytes_min =     32,
732         .period_bytes_max =     128 * 1024,
733         .periods_min =          2,
734         .periods_max =          VIA_TABLE_SIZE / 2,
735         .fifo_size =            0,
736 };
737 
738 
739 /*
740  * open callback skeleton
741  */
742 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
743                                       struct snd_pcm_substream *substream)
744 {
745         struct snd_pcm_runtime *runtime = substream->runtime;
746         int err;
747         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
748         static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
749                 .count = ARRAY_SIZE(rates),
750                 .list = rates,
751                 .mask = 0,
752         };
753 
754         runtime->hw = snd_via82xx_hw;
755         
756         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
757                                               &hw_constraints_rates)) < 0)
758                 return err;
759 
760         /* we may remove following constaint when we modify table entries
761            in interrupt */
762         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
763                 return err;
764 
765         runtime->private_data = viadev;
766         viadev->substream = substream;
767 
768         return 0;
769 }
770 
771 
772 /*
773  * open callback for playback
774  */
775 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
776 {
777         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
778         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
779 
780         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
781 }
782 
783 /*
784  * open callback for capture
785  */
786 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
787 {
788         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
789         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
790 
791         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
792 }
793 
794 /*
795  * close callback
796  */
797 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
798 {
799         struct viadev *viadev = substream->runtime->private_data;
800 
801         viadev->substream = NULL;
802         return 0;
803 }
804 
805 
806 /* via686 playback callbacks */
807 static struct snd_pcm_ops snd_via686_playback_ops = {
808         .open =         snd_via82xx_playback_open,
809         .close =        snd_via82xx_pcm_close,
810         .ioctl =        snd_pcm_lib_ioctl,
811         .hw_params =    snd_via82xx_hw_params,
812         .hw_free =      snd_via82xx_hw_free,
813         .prepare =      snd_via82xx_pcm_prepare,
814         .trigger =      snd_via82xx_pcm_trigger,
815         .pointer =      snd_via686_pcm_pointer,
816         .page =         snd_pcm_sgbuf_ops_page,
817 };
818 
819 /* via686 capture callbacks */
820 static struct snd_pcm_ops snd_via686_capture_ops = {
821         .open =         snd_via82xx_capture_open,
822         .close =        snd_via82xx_pcm_close,
823         .ioctl =        snd_pcm_lib_ioctl,
824         .hw_params =    snd_via82xx_hw_params,
825         .hw_free =      snd_via82xx_hw_free,
826         .prepare =      snd_via82xx_pcm_prepare,
827         .trigger =      snd_via82xx_pcm_trigger,
828         .pointer =      snd_via686_pcm_pointer,
829         .page =         snd_pcm_sgbuf_ops_page,
830 };
831 
832 
833 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
834                         int direction)
835 {
836         chip->devs[idx].reg_offset = reg_offset;
837         chip->devs[idx].direction = direction;
838         chip->devs[idx].port = chip->port + reg_offset;
839 }
840 
841 /*
842  * create a pcm instance for via686a/b
843  */
844 static int snd_via686_pcm_new(struct via82xx_modem *chip)
845 {
846         struct snd_pcm *pcm;
847         int err;
848 
849         chip->playback_devno = 0;
850         chip->capture_devno = 1;
851         chip->num_devs = 2;
852         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
853 
854         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
855         if (err < 0)
856                 return err;
857         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
858         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
859         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
860         pcm->private_data = chip;
861         strcpy(pcm->name, chip->card->shortname);
862         chip->pcms[0] = pcm;
863         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
864         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
865 
866         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
867                                                          snd_dma_pci_data(chip->pci),
868                                                          64*1024, 128*1024)) < 0)
869                 return err;
870 
871         return 0;
872 }
873 
874 
875 /*
876  *  Mixer part
877  */
878 
879 
880 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
881 {
882         struct via82xx_modem *chip = bus->private_data;
883         chip->ac97_bus = NULL;
884 }
885 
886 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
887 {
888         struct via82xx_modem *chip = ac97->private_data;
889         chip->ac97 = NULL;
890 }
891 
892 
893 static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
894 {
895         struct snd_ac97_template ac97;
896         int err;
897         static struct snd_ac97_bus_ops ops = {
898                 .write = snd_via82xx_codec_write,
899                 .read = snd_via82xx_codec_read,
900                 .wait = snd_via82xx_codec_wait,
901         };
902 
903         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
904                 return err;
905         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
906         chip->ac97_bus->clock = chip->ac97_clock;
907 
908         memset(&ac97, 0, sizeof(ac97));
909         ac97.private_data = chip;
910         ac97.private_free = snd_via82xx_mixer_free_ac97;
911         ac97.pci = chip->pci;
912         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
913         ac97.num = chip->ac97_secondary;
914 
915         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
916                 return err;
917 
918         return 0;
919 }
920 
921 
922 /*
923  * proc interface
924  */
925 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
926 {
927         struct via82xx_modem *chip = entry->private_data;
928         int i;
929         
930         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
931         for (i = 0; i < 0xa0; i += 4) {
932                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
933         }
934 }
935 
936 static void snd_via82xx_proc_init(struct via82xx_modem *chip)
937 {
938         struct snd_info_entry *entry;
939 
940         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
941                 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
942 }
943 
944 /*
945  *
946  */
947 
948 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
949 {
950         unsigned int val;
951         unsigned long end_time;
952         unsigned char pval;
953 
954         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
955         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
956                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
957                 udelay(100);
958         }
959 
960         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
961         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
962                 /* deassert ACLink reset, force SYNC */
963                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
964                                       VIA_ACLINK_CTRL_ENABLE |
965                                       VIA_ACLINK_CTRL_RESET |
966                                       VIA_ACLINK_CTRL_SYNC);
967                 udelay(100);
968 #if 1 /* FIXME: should we do full reset here for all chip models? */
969                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
970                 udelay(100);
971 #else
972                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
973                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
974                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
975                 udelay(2);
976 #endif
977                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
978                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
979                 udelay(100);
980         }
981         
982         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
983         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
984                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
985                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
986                 udelay(100);
987         }
988 
989         /* wait until codec ready */
990         end_time = jiffies + msecs_to_jiffies(750);
991         do {
992                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
993                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
994                         break;
995                 schedule_timeout_uninterruptible(1);
996         } while (time_before(jiffies, end_time));
997 
998         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
999                 dev_err(chip->card->dev,
1000                         "AC'97 codec is not ready [0x%x]\n", val);
1001 
1002         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1003                                  VIA_REG_AC97_SECONDARY_VALID |
1004                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1005         end_time = jiffies + msecs_to_jiffies(750);
1006         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1007                                  VIA_REG_AC97_SECONDARY_VALID |
1008                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1009         do {
1010                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1011                         chip->ac97_secondary = 1;
1012                         goto __ac97_ok2;
1013                 }
1014                 schedule_timeout_uninterruptible(1);
1015         } while (time_before(jiffies, end_time));
1016         /* This is ok, the most of motherboards have only one codec */
1017 
1018       __ac97_ok2:
1019 
1020         /* route FM trap to IRQ, disable FM trap */
1021         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1022         /* disable all GPI interrupts */
1023         outl(0, VIAREG(chip, GPI_INTR));
1024 
1025         return 0;
1026 }
1027 
1028 #ifdef CONFIG_PM_SLEEP
1029 /*
1030  * power management
1031  */
1032 static int snd_via82xx_suspend(struct device *dev)
1033 {
1034         struct pci_dev *pci = to_pci_dev(dev);
1035         struct snd_card *card = dev_get_drvdata(dev);
1036         struct via82xx_modem *chip = card->private_data;
1037         int i;
1038 
1039         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1040         for (i = 0; i < 2; i++)
1041                 snd_pcm_suspend_all(chip->pcms[i]);
1042         for (i = 0; i < chip->num_devs; i++)
1043                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1044         synchronize_irq(chip->irq);
1045         snd_ac97_suspend(chip->ac97);
1046 
1047         pci_disable_device(pci);
1048         pci_save_state(pci);
1049         pci_set_power_state(pci, PCI_D3hot);
1050         return 0;
1051 }
1052 
1053 static int snd_via82xx_resume(struct device *dev)
1054 {
1055         struct pci_dev *pci = to_pci_dev(dev);
1056         struct snd_card *card = dev_get_drvdata(dev);
1057         struct via82xx_modem *chip = card->private_data;
1058         int i;
1059 
1060         pci_set_power_state(pci, PCI_D0);
1061         pci_restore_state(pci);
1062         if (pci_enable_device(pci) < 0) {
1063                 dev_err(dev, "pci_enable_device failed, disabling device\n");
1064                 snd_card_disconnect(card);
1065                 return -EIO;
1066         }
1067         pci_set_master(pci);
1068 
1069         snd_via82xx_chip_init(chip);
1070 
1071         snd_ac97_resume(chip->ac97);
1072 
1073         for (i = 0; i < chip->num_devs; i++)
1074                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1075 
1076         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1077         return 0;
1078 }
1079 
1080 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1081 #define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1082 #else
1083 #define SND_VIA82XX_PM_OPS      NULL
1084 #endif /* CONFIG_PM_SLEEP */
1085 
1086 static int snd_via82xx_free(struct via82xx_modem *chip)
1087 {
1088         unsigned int i;
1089 
1090         if (chip->irq < 0)
1091                 goto __end_hw;
1092         /* disable interrupts */
1093         for (i = 0; i < chip->num_devs; i++)
1094                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1095 
1096       __end_hw:
1097         if (chip->irq >= 0)
1098                 free_irq(chip->irq, chip);
1099         pci_release_regions(chip->pci);
1100         pci_disable_device(chip->pci);
1101         kfree(chip);
1102         return 0;
1103 }
1104 
1105 static int snd_via82xx_dev_free(struct snd_device *device)
1106 {
1107         struct via82xx_modem *chip = device->device_data;
1108         return snd_via82xx_free(chip);
1109 }
1110 
1111 static int snd_via82xx_create(struct snd_card *card,
1112                               struct pci_dev *pci,
1113                               int chip_type,
1114                               int revision,
1115                               unsigned int ac97_clock,
1116                               struct via82xx_modem **r_via)
1117 {
1118         struct via82xx_modem *chip;
1119         int err;
1120         static struct snd_device_ops ops = {
1121                 .dev_free =     snd_via82xx_dev_free,
1122         };
1123 
1124         if ((err = pci_enable_device(pci)) < 0)
1125                 return err;
1126 
1127         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1128                 pci_disable_device(pci);
1129                 return -ENOMEM;
1130         }
1131 
1132         spin_lock_init(&chip->reg_lock);
1133         chip->card = card;
1134         chip->pci = pci;
1135         chip->irq = -1;
1136 
1137         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1138                 kfree(chip);
1139                 pci_disable_device(pci);
1140                 return err;
1141         }
1142         chip->port = pci_resource_start(pci, 0);
1143         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1144                         KBUILD_MODNAME, chip)) {
1145                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1146                 snd_via82xx_free(chip);
1147                 return -EBUSY;
1148         }
1149         chip->irq = pci->irq;
1150         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1151                 chip->ac97_clock = ac97_clock;
1152         synchronize_irq(chip->irq);
1153 
1154         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1155                 snd_via82xx_free(chip);
1156                 return err;
1157         }
1158 
1159         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1160                 snd_via82xx_free(chip);
1161                 return err;
1162         }
1163 
1164         /* The 8233 ac97 controller does not implement the master bit
1165          * in the pci command register. IMHO this is a violation of the PCI spec.
1166          * We call pci_set_master here because it does not hurt. */
1167         pci_set_master(pci);
1168 
1169         *r_via = chip;
1170         return 0;
1171 }
1172 
1173 
1174 static int snd_via82xx_probe(struct pci_dev *pci,
1175                              const struct pci_device_id *pci_id)
1176 {
1177         struct snd_card *card;
1178         struct via82xx_modem *chip;
1179         int chip_type = 0, card_type;
1180         unsigned int i;
1181         int err;
1182 
1183         err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1184         if (err < 0)
1185                 return err;
1186 
1187         card_type = pci_id->driver_data;
1188         switch (card_type) {
1189         case TYPE_CARD_VIA82XX_MODEM:
1190                 strcpy(card->driver, "VIA82XX-MODEM");
1191                 sprintf(card->shortname, "VIA 82XX modem");
1192                 break;
1193         default:
1194                 dev_err(card->dev, "invalid card type %d\n", card_type);
1195                 err = -EINVAL;
1196                 goto __error;
1197         }
1198                 
1199         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1200                                       ac97_clock, &chip)) < 0)
1201                 goto __error;
1202         card->private_data = chip;
1203         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1204                 goto __error;
1205 
1206         if ((err = snd_via686_pcm_new(chip)) < 0 )
1207                 goto __error;
1208 
1209         /* disable interrupts */
1210         for (i = 0; i < chip->num_devs; i++)
1211                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1212 
1213         sprintf(card->longname, "%s at 0x%lx, irq %d",
1214                 card->shortname, chip->port, chip->irq);
1215 
1216         snd_via82xx_proc_init(chip);
1217 
1218         if ((err = snd_card_register(card)) < 0) {
1219                 snd_card_free(card);
1220                 return err;
1221         }
1222         pci_set_drvdata(pci, card);
1223         return 0;
1224 
1225  __error:
1226         snd_card_free(card);
1227         return err;
1228 }
1229 
1230 static void snd_via82xx_remove(struct pci_dev *pci)
1231 {
1232         snd_card_free(pci_get_drvdata(pci));
1233 }
1234 
1235 static struct pci_driver via82xx_modem_driver = {
1236         .name = KBUILD_MODNAME,
1237         .id_table = snd_via82xx_modem_ids,
1238         .probe = snd_via82xx_probe,
1239         .remove = snd_via82xx_remove,
1240         .driver = {
1241                 .pm = SND_VIA82XX_PM_OPS,
1242         },
1243 };
1244 
1245 module_pci_driver(via82xx_modem_driver);
1246 

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