[ALSA] Remove delayed work properly at free and suspend
[linux-2.6.git] / sound / i2c / other / ak4114.c
1 /*
2  *  Routines for control of the AK4114 via I2C and 4-wire serial interface
3  *  IEC958 (S/PDIF) receiver by Asahi Kasei
4  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
5  *
6  *
7  *   This program is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU General Public License as published by
9  *   the Free Software Foundation; either version 2 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This program is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with this program; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20  *
21  */
22
23 #include <sound/driver.h>
24 #include <linux/slab.h>
25 #include <linux/delay.h>
26 #include <sound/core.h>
27 #include <sound/control.h>
28 #include <sound/pcm.h>
29 #include <sound/ak4114.h>
30 #include <sound/asoundef.h>
31
32 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
33 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
34 MODULE_LICENSE("GPL");
35
36 #define AK4114_ADDR                     0x00 /* fixed address */
37
38 static void ak4114_stats(struct work_struct *work);
39
40 static void reg_write(struct ak4114 *ak4114, unsigned char reg, unsigned char val)
41 {
42         ak4114->write(ak4114->private_data, reg, val);
43         if (reg <= AK4114_REG_INT1_MASK)
44                 ak4114->regmap[reg] = val;
45         else if (reg >= AK4114_REG_RXCSB0 && reg <= AK4114_REG_TXCSB4)
46                 ak4114->txcsb[reg-AK4114_REG_RXCSB0] = val;
47 }
48
49 static inline unsigned char reg_read(struct ak4114 *ak4114, unsigned char reg)
50 {
51         return ak4114->read(ak4114->private_data, reg);
52 }
53
54 #if 0
55 static void reg_dump(struct ak4114 *ak4114)
56 {
57         int i;
58
59         printk(KERN_DEBUG "AK4114 REG DUMP:\n");
60         for (i = 0; i < 0x20; i++)
61                 printk(KERN_DEBUG "reg[%02x] = %02x (%02x)\n", i, reg_read(ak4114, i), i < sizeof(ak4114->regmap) ? ak4114->regmap[i] : 0);
62 }
63 #endif
64
65 static void snd_ak4114_free(struct ak4114 *chip)
66 {
67         chip->init = 1; /* don't schedule new work */
68         mb();
69         cancel_delayed_work(&chip->work);
70         flush_scheduled_work();
71         kfree(chip);
72 }
73
74 static int snd_ak4114_dev_free(struct snd_device *device)
75 {
76         struct ak4114 *chip = device->device_data;
77         snd_ak4114_free(chip);
78         return 0;
79 }
80
81 int snd_ak4114_create(struct snd_card *card,
82                       ak4114_read_t *read, ak4114_write_t *write,
83                       const unsigned char pgm[7], const unsigned char txcsb[5],
84                       void *private_data, struct ak4114 **r_ak4114)
85 {
86         struct ak4114 *chip;
87         int err = 0;
88         unsigned char reg;
89         static struct snd_device_ops ops = {
90                 .dev_free =     snd_ak4114_dev_free,
91         };
92
93         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
94         if (chip == NULL)
95                 return -ENOMEM;
96         spin_lock_init(&chip->lock);
97         chip->card = card;
98         chip->read = read;
99         chip->write = write;
100         chip->private_data = private_data;
101         INIT_DELAYED_WORK(&chip->work, ak4114_stats);
102
103         for (reg = 0; reg < 7; reg++)
104                 chip->regmap[reg] = pgm[reg];
105         for (reg = 0; reg < 5; reg++)
106                 chip->txcsb[reg] = txcsb[reg];
107
108         snd_ak4114_reinit(chip);
109
110         chip->rcs0 = reg_read(chip, AK4114_REG_RCS0) & ~(AK4114_QINT | AK4114_CINT);
111         chip->rcs1 = reg_read(chip, AK4114_REG_RCS1);
112
113         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
114                 goto __fail;
115
116         if (r_ak4114)
117                 *r_ak4114 = chip;
118         return 0;
119
120       __fail:
121         snd_ak4114_free(chip);
122         return err < 0 ? err : -EIO;
123 }
124
125 void snd_ak4114_reg_write(struct ak4114 *chip, unsigned char reg, unsigned char mask, unsigned char val)
126 {
127         if (reg <= AK4114_REG_INT1_MASK)
128                 reg_write(chip, reg, (chip->regmap[reg] & ~mask) | val);
129         else if (reg >= AK4114_REG_TXCSB0 && reg <= AK4114_REG_TXCSB4)
130                 reg_write(chip, reg, (chip->txcsb[reg] & ~mask) | val);
131 }
132
133 void snd_ak4114_reinit(struct ak4114 *chip)
134 {
135         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
136
137         chip->init = 1;
138         mb();
139         flush_scheduled_work();
140         /* bring the chip to reset state and powerdown state */
141         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
142         udelay(200);
143         /* release reset, but leave powerdown */
144         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
145         udelay(200);
146         for (reg = 1; reg < 7; reg++)
147                 reg_write(chip, reg, chip->regmap[reg]);
148         for (reg = 0; reg < 5; reg++)
149                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
150         /* release powerdown, everything is initialized now */
151         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
152         /* bring up statistics / event queing */
153         chip->init = 0;
154         schedule_delayed_work(&chip->work, HZ / 10);
155 }
156
157 static unsigned int external_rate(unsigned char rcs1)
158 {
159         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
160         case AK4114_FS_32000HZ: return 32000;
161         case AK4114_FS_44100HZ: return 44100;
162         case AK4114_FS_48000HZ: return 48000;
163         case AK4114_FS_88200HZ: return 88200;
164         case AK4114_FS_96000HZ: return 96000;
165         case AK4114_FS_176400HZ: return 176400;
166         case AK4114_FS_192000HZ: return 192000;
167         default:                return 0;
168         }
169 }
170
171 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
172                                     struct snd_ctl_elem_info *uinfo)
173 {
174         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
175         uinfo->count = 1;
176         uinfo->value.integer.min = 0;
177         uinfo->value.integer.max = LONG_MAX;
178         return 0;
179 }
180
181 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
182                                    struct snd_ctl_elem_value *ucontrol)
183 {
184         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
185         long *ptr;
186
187         spin_lock_irq(&chip->lock);
188         ptr = (long *)(((char *)chip) + kcontrol->private_value);
189         ucontrol->value.integer.value[0] = *ptr;
190         *ptr = 0;
191         spin_unlock_irq(&chip->lock);
192         return 0;
193 }
194
195 static int snd_ak4114_in_bit_info(struct snd_kcontrol *kcontrol,
196                                   struct snd_ctl_elem_info *uinfo)
197 {
198         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
199         uinfo->count = 1;
200         uinfo->value.integer.min = 0;
201         uinfo->value.integer.max = 1;
202         return 0;
203 }
204
205 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
206                                  struct snd_ctl_elem_value *ucontrol)
207 {
208         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
209         unsigned char reg = kcontrol->private_value & 0xff;
210         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
211         unsigned char inv = (kcontrol->private_value >> 31) & 1;
212
213         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
214         return 0;
215 }
216
217 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
218                                 struct snd_ctl_elem_info *uinfo)
219 {
220         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
221         uinfo->count = 1;
222         uinfo->value.integer.min = 0;
223         uinfo->value.integer.max = 192000;
224         return 0;
225 }
226
227 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
228                                struct snd_ctl_elem_value *ucontrol)
229 {
230         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
231
232         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
233         return 0;
234 }
235
236 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
237 {
238         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
239         uinfo->count = 1;
240         return 0;
241 }
242
243 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
244                                 struct snd_ctl_elem_value *ucontrol)
245 {
246         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
247         unsigned i;
248
249         for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
250                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
251         return 0;
252 }
253
254 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
255                                          struct snd_ctl_elem_value *ucontrol)
256 {
257         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
258         unsigned i;
259
260         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
261                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
262         return 0;
263 }
264
265 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
266                                          struct snd_ctl_elem_value *ucontrol)
267 {
268         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
269         unsigned i;
270
271         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
272                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
273         return 0;
274 }
275
276 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
277 {
278         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
279         uinfo->count = 1;
280         return 0;
281 }
282
283 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
284                                       struct snd_ctl_elem_value *ucontrol)
285 {
286         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
287         return 0;
288 }
289
290 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
291 {
292         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
293         uinfo->value.integer.min = 0;
294         uinfo->value.integer.max = 0xffff;
295         uinfo->count = 4;
296         return 0;
297 }
298
299 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
300                                  struct snd_ctl_elem_value *ucontrol)
301 {
302         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
303         unsigned short tmp;
304
305         ucontrol->value.integer.value[0] = 0xf8f2;
306         ucontrol->value.integer.value[1] = 0x4e1f;
307         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
308         ucontrol->value.integer.value[2] = tmp;
309         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
310         ucontrol->value.integer.value[3] = tmp;
311         return 0;
312 }
313
314 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
315 {
316         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
317         uinfo->count = AK4114_REG_QSUB_SIZE;
318         return 0;
319 }
320
321 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
322                                  struct snd_ctl_elem_value *ucontrol)
323 {
324         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
325         unsigned i;
326
327         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
328                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
329         return 0;
330 }
331
332 /* Don't forget to change AK4114_CONTROLS define!!! */
333 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
334 {
335         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
336         .name =         "IEC958 Parity Errors",
337         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
338         .info =         snd_ak4114_in_error_info,
339         .get =          snd_ak4114_in_error_get,
340         .private_value = offsetof(struct ak4114, parity_errors),
341 },
342 {
343         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
344         .name =         "IEC958 V-Bit Errors",
345         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
346         .info =         snd_ak4114_in_error_info,
347         .get =          snd_ak4114_in_error_get,
348         .private_value = offsetof(struct ak4114, v_bit_errors),
349 },
350 {
351         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
352         .name =         "IEC958 C-CRC Errors",
353         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
354         .info =         snd_ak4114_in_error_info,
355         .get =          snd_ak4114_in_error_get,
356         .private_value = offsetof(struct ak4114, ccrc_errors),
357 },
358 {
359         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
360         .name =         "IEC958 Q-CRC Errors",
361         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
362         .info =         snd_ak4114_in_error_info,
363         .get =          snd_ak4114_in_error_get,
364         .private_value = offsetof(struct ak4114, qcrc_errors),
365 },
366 {
367         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
368         .name =         "IEC958 External Rate",
369         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
370         .info =         snd_ak4114_rate_info,
371         .get =          snd_ak4114_rate_get,
372 },
373 {
374         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
375         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
376         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
377         .info =         snd_ak4114_spdif_mask_info,
378         .get =          snd_ak4114_spdif_mask_get,
379 },
380 {
381         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
382         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
383         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
384         .info =         snd_ak4114_spdif_info,
385         .get =          snd_ak4114_spdif_playback_get,
386         .put =          snd_ak4114_spdif_playback_put,
387 },
388 {
389         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
390         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
391         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
392         .info =         snd_ak4114_spdif_mask_info,
393         .get =          snd_ak4114_spdif_mask_get,
394 },
395 {
396         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
397         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
398         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
399         .info =         snd_ak4114_spdif_info,
400         .get =          snd_ak4114_spdif_get,
401 },
402 {
403         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
404         .name =         "IEC958 Preample Capture Default",
405         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
406         .info =         snd_ak4114_spdif_pinfo,
407         .get =          snd_ak4114_spdif_pget,
408 },
409 {
410         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
411         .name =         "IEC958 Q-subcode Capture Default",
412         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
413         .info =         snd_ak4114_spdif_qinfo,
414         .get =          snd_ak4114_spdif_qget,
415 },
416 {
417         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
418         .name =         "IEC958 Audio",
419         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
420         .info =         snd_ak4114_in_bit_info,
421         .get =          snd_ak4114_in_bit_get,
422         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
423 },
424 {
425         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
426         .name =         "IEC958 Non-PCM Bitstream",
427         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
428         .info =         snd_ak4114_in_bit_info,
429         .get =          snd_ak4114_in_bit_get,
430         .private_value = (6<<8) | AK4114_REG_RCS1,
431 },
432 {
433         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
434         .name =         "IEC958 DTS Bitstream",
435         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
436         .info =         snd_ak4114_in_bit_info,
437         .get =          snd_ak4114_in_bit_get,
438         .private_value = (3<<8) | AK4114_REG_RCS1,
439 }
440 };
441
442 int snd_ak4114_build(struct ak4114 *ak4114,
443                      struct snd_pcm_substream *ply_substream,
444                      struct snd_pcm_substream *cap_substream)
445 {
446         struct snd_kcontrol *kctl;
447         unsigned int idx;
448         int err;
449
450         snd_assert(cap_substream, return -EINVAL);
451         ak4114->playback_substream = ply_substream;
452         ak4114->capture_substream = cap_substream;
453         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
454                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
455                 if (kctl == NULL)
456                         return -ENOMEM;
457                 if (!strstr(kctl->id.name, "Playback")) {
458                         if (ply_substream == NULL) {
459                                 snd_ctl_free_one(kctl);
460                                 ak4114->kctls[idx] = NULL;
461                                 continue;
462                         }
463                         kctl->id.device = ply_substream->pcm->device;
464                         kctl->id.subdevice = ply_substream->number;
465                 } else {
466                         kctl->id.device = cap_substream->pcm->device;
467                         kctl->id.subdevice = cap_substream->number;
468                 }
469                 err = snd_ctl_add(ak4114->card, kctl);
470                 if (err < 0)
471                         return err;
472                 ak4114->kctls[idx] = kctl;
473         }
474         return 0;
475 }
476
477 int snd_ak4114_external_rate(struct ak4114 *ak4114)
478 {
479         unsigned char rcs1;
480
481         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
482         return external_rate(rcs1);
483 }
484
485 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
486 {
487         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
488         unsigned long _flags;
489         int res = 0;
490         unsigned char rcs0, rcs1;
491         unsigned char c0, c1;
492
493         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
494         if (flags & AK4114_CHECK_NO_STAT)
495                 goto __rate;
496         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
497         spin_lock_irqsave(&ak4114->lock, _flags);
498         if (rcs0 & AK4114_PAR)
499                 ak4114->parity_errors++;
500         if (rcs1 & AK4114_V)
501                 ak4114->v_bit_errors++;
502         if (rcs1 & AK4114_CCRC)
503                 ak4114->ccrc_errors++;
504         if (rcs1 & AK4114_QCRC)
505                 ak4114->qcrc_errors++;
506         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
507                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
508         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
509         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
510         ak4114->rcs1 = rcs1;
511         spin_unlock_irqrestore(&ak4114->lock, _flags);
512
513         if (rcs0 & AK4114_PAR)
514                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[0]->id);
515         if (rcs0 & AK4114_V)
516                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[1]->id);
517         if (rcs1 & AK4114_CCRC)
518                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[2]->id);
519         if (rcs1 & AK4114_QCRC)
520                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[3]->id);
521
522         /* rate change */
523         if (c1 & 0xf0)
524                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[4]->id);
525
526         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
527                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[9]->id);
528         if (c0 & AK4114_QINT)
529                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[10]->id);
530
531         if (c0 & AK4114_AUDION)
532                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[11]->id);
533         if (c0 & AK4114_AUTO)
534                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[12]->id);
535         if (c0 & AK4114_DTSCD)
536                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE, &ak4114->kctls[13]->id);
537
538         if (ak4114->change_callback && (c0 | c1) != 0)
539                 ak4114->change_callback(ak4114, c0, c1);
540
541       __rate:
542         /* compare rate */
543         res = external_rate(rcs1);
544         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
545                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
546                 if (snd_pcm_running(ak4114->capture_substream)) {
547                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
548                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
549                         res = 1;
550                 }
551                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
552         }
553         return res;
554 }
555
556 static void ak4114_stats(struct work_struct *work)
557 {
558         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
559
560         if (chip->init)
561                 return;
562         snd_ak4114_check_rate_and_errors(chip, 0);
563         schedule_delayed_work(&chip->work, HZ / 10);
564 }
565
566 EXPORT_SYMBOL(snd_ak4114_create);
567 EXPORT_SYMBOL(snd_ak4114_reg_write);
568 EXPORT_SYMBOL(snd_ak4114_reinit);
569 EXPORT_SYMBOL(snd_ak4114_build);
570 EXPORT_SYMBOL(snd_ak4114_external_rate);
571 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);