15061bd72776a0eacbb418d7abb1125bda5398cf
[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@perex.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 <linux/slab.h>
24 #include <linux/delay.h>
25 #include <sound/core.h>
26 #include <sound/control.h>
27 #include <sound/pcm.h>
28 #include <sound/ak4114.h>
29 #include <sound/asoundef.h>
30
31 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
32 MODULE_DESCRIPTION("AK4114 IEC958 (S/PDIF) receiver by Asahi Kasei");
33 MODULE_LICENSE("GPL");
34
35 #define AK4114_ADDR                     0x00 /* fixed address */
36
37 static void ak4114_stats(struct work_struct *work);
38 static void ak4114_init_regs(struct ak4114 *chip);
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_TXCSB0 && reg <= AK4114_REG_TXCSB4)
46                 ak4114->txcsb[reg-AK4114_REG_TXCSB0] = 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         ak4114_init_regs(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,
131                           (chip->txcsb[reg-AK4114_REG_TXCSB0] & ~mask) | val);
132 }
133
134 static void ak4114_init_regs(struct ak4114 *chip)
135 {
136         unsigned char old = chip->regmap[AK4114_REG_PWRDN], reg;
137
138         /* bring the chip to reset state and powerdown state */
139         reg_write(chip, AK4114_REG_PWRDN, old & ~(AK4114_RST|AK4114_PWN));
140         udelay(200);
141         /* release reset, but leave powerdown */
142         reg_write(chip, AK4114_REG_PWRDN, (old | AK4114_RST) & ~AK4114_PWN);
143         udelay(200);
144         for (reg = 1; reg < 7; reg++)
145                 reg_write(chip, reg, chip->regmap[reg]);
146         for (reg = 0; reg < 5; reg++)
147                 reg_write(chip, reg + AK4114_REG_TXCSB0, chip->txcsb[reg]);
148         /* release powerdown, everything is initialized now */
149         reg_write(chip, AK4114_REG_PWRDN, old | AK4114_RST | AK4114_PWN);
150 }
151
152 void snd_ak4114_reinit(struct ak4114 *chip)
153 {
154         chip->init = 1;
155         mb();
156         flush_scheduled_work();
157         ak4114_init_regs(chip);
158         /* bring up statistics / event queing */
159         chip->init = 0;
160         if (chip->kctls[0])
161                 schedule_delayed_work(&chip->work, HZ / 10);
162 }
163
164 static unsigned int external_rate(unsigned char rcs1)
165 {
166         switch (rcs1 & (AK4114_FS0|AK4114_FS1|AK4114_FS2|AK4114_FS3)) {
167         case AK4114_FS_32000HZ: return 32000;
168         case AK4114_FS_44100HZ: return 44100;
169         case AK4114_FS_48000HZ: return 48000;
170         case AK4114_FS_88200HZ: return 88200;
171         case AK4114_FS_96000HZ: return 96000;
172         case AK4114_FS_176400HZ: return 176400;
173         case AK4114_FS_192000HZ: return 192000;
174         default:                return 0;
175         }
176 }
177
178 static int snd_ak4114_in_error_info(struct snd_kcontrol *kcontrol,
179                                     struct snd_ctl_elem_info *uinfo)
180 {
181         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
182         uinfo->count = 1;
183         uinfo->value.integer.min = 0;
184         uinfo->value.integer.max = LONG_MAX;
185         return 0;
186 }
187
188 static int snd_ak4114_in_error_get(struct snd_kcontrol *kcontrol,
189                                    struct snd_ctl_elem_value *ucontrol)
190 {
191         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
192         long *ptr;
193
194         spin_lock_irq(&chip->lock);
195         ptr = (long *)(((char *)chip) + kcontrol->private_value);
196         ucontrol->value.integer.value[0] = *ptr;
197         *ptr = 0;
198         spin_unlock_irq(&chip->lock);
199         return 0;
200 }
201
202 #define snd_ak4114_in_bit_info          snd_ctl_boolean_mono_info
203
204 static int snd_ak4114_in_bit_get(struct snd_kcontrol *kcontrol,
205                                  struct snd_ctl_elem_value *ucontrol)
206 {
207         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
208         unsigned char reg = kcontrol->private_value & 0xff;
209         unsigned char bit = (kcontrol->private_value >> 8) & 0xff;
210         unsigned char inv = (kcontrol->private_value >> 31) & 1;
211
212         ucontrol->value.integer.value[0] = ((reg_read(chip, reg) & (1 << bit)) ? 1 : 0) ^ inv;
213         return 0;
214 }
215
216 static int snd_ak4114_rate_info(struct snd_kcontrol *kcontrol,
217                                 struct snd_ctl_elem_info *uinfo)
218 {
219         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
220         uinfo->count = 1;
221         uinfo->value.integer.min = 0;
222         uinfo->value.integer.max = 192000;
223         return 0;
224 }
225
226 static int snd_ak4114_rate_get(struct snd_kcontrol *kcontrol,
227                                struct snd_ctl_elem_value *ucontrol)
228 {
229         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
230
231         ucontrol->value.integer.value[0] = external_rate(reg_read(chip, AK4114_REG_RCS1));
232         return 0;
233 }
234
235 static int snd_ak4114_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
236 {
237         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
238         uinfo->count = 1;
239         return 0;
240 }
241
242 static int snd_ak4114_spdif_get(struct snd_kcontrol *kcontrol,
243                                 struct snd_ctl_elem_value *ucontrol)
244 {
245         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
246         unsigned i;
247
248         for (i = 0; i < AK4114_REG_RXCSB_SIZE; i++)
249                 ucontrol->value.iec958.status[i] = reg_read(chip, AK4114_REG_RXCSB0 + i);
250         return 0;
251 }
252
253 static int snd_ak4114_spdif_playback_get(struct snd_kcontrol *kcontrol,
254                                          struct snd_ctl_elem_value *ucontrol)
255 {
256         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
257         unsigned i;
258
259         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
260                 ucontrol->value.iec958.status[i] = chip->txcsb[i];
261         return 0;
262 }
263
264 static int snd_ak4114_spdif_playback_put(struct snd_kcontrol *kcontrol,
265                                          struct snd_ctl_elem_value *ucontrol)
266 {
267         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
268         unsigned i;
269
270         for (i = 0; i < AK4114_REG_TXCSB_SIZE; i++)
271                 reg_write(chip, AK4114_REG_TXCSB0 + i, ucontrol->value.iec958.status[i]);
272         return 0;
273 }
274
275 static int snd_ak4114_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
276 {
277         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
278         uinfo->count = 1;
279         return 0;
280 }
281
282 static int snd_ak4114_spdif_mask_get(struct snd_kcontrol *kcontrol,
283                                       struct snd_ctl_elem_value *ucontrol)
284 {
285         memset(ucontrol->value.iec958.status, 0xff, AK4114_REG_RXCSB_SIZE);
286         return 0;
287 }
288
289 static int snd_ak4114_spdif_pinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
290 {
291         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
292         uinfo->value.integer.min = 0;
293         uinfo->value.integer.max = 0xffff;
294         uinfo->count = 4;
295         return 0;
296 }
297
298 static int snd_ak4114_spdif_pget(struct snd_kcontrol *kcontrol,
299                                  struct snd_ctl_elem_value *ucontrol)
300 {
301         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
302         unsigned short tmp;
303
304         ucontrol->value.integer.value[0] = 0xf8f2;
305         ucontrol->value.integer.value[1] = 0x4e1f;
306         tmp = reg_read(chip, AK4114_REG_Pc0) | (reg_read(chip, AK4114_REG_Pc1) << 8);
307         ucontrol->value.integer.value[2] = tmp;
308         tmp = reg_read(chip, AK4114_REG_Pd0) | (reg_read(chip, AK4114_REG_Pd1) << 8);
309         ucontrol->value.integer.value[3] = tmp;
310         return 0;
311 }
312
313 static int snd_ak4114_spdif_qinfo(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
314 {
315         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
316         uinfo->count = AK4114_REG_QSUB_SIZE;
317         return 0;
318 }
319
320 static int snd_ak4114_spdif_qget(struct snd_kcontrol *kcontrol,
321                                  struct snd_ctl_elem_value *ucontrol)
322 {
323         struct ak4114 *chip = snd_kcontrol_chip(kcontrol);
324         unsigned i;
325
326         for (i = 0; i < AK4114_REG_QSUB_SIZE; i++)
327                 ucontrol->value.bytes.data[i] = reg_read(chip, AK4114_REG_QSUB_ADDR + i);
328         return 0;
329 }
330
331 /* Don't forget to change AK4114_CONTROLS define!!! */
332 static struct snd_kcontrol_new snd_ak4114_iec958_controls[] = {
333 {
334         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
335         .name =         "IEC958 Parity Errors",
336         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
337         .info =         snd_ak4114_in_error_info,
338         .get =          snd_ak4114_in_error_get,
339         .private_value = offsetof(struct ak4114, parity_errors),
340 },
341 {
342         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
343         .name =         "IEC958 V-Bit Errors",
344         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
345         .info =         snd_ak4114_in_error_info,
346         .get =          snd_ak4114_in_error_get,
347         .private_value = offsetof(struct ak4114, v_bit_errors),
348 },
349 {
350         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
351         .name =         "IEC958 C-CRC Errors",
352         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
353         .info =         snd_ak4114_in_error_info,
354         .get =          snd_ak4114_in_error_get,
355         .private_value = offsetof(struct ak4114, ccrc_errors),
356 },
357 {
358         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
359         .name =         "IEC958 Q-CRC Errors",
360         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
361         .info =         snd_ak4114_in_error_info,
362         .get =          snd_ak4114_in_error_get,
363         .private_value = offsetof(struct ak4114, qcrc_errors),
364 },
365 {
366         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
367         .name =         "IEC958 External Rate",
368         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
369         .info =         snd_ak4114_rate_info,
370         .get =          snd_ak4114_rate_get,
371 },
372 {
373         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
374         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
375         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
376         .info =         snd_ak4114_spdif_mask_info,
377         .get =          snd_ak4114_spdif_mask_get,
378 },
379 {
380         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
381         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
382         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
383         .info =         snd_ak4114_spdif_info,
384         .get =          snd_ak4114_spdif_playback_get,
385         .put =          snd_ak4114_spdif_playback_put,
386 },
387 {
388         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
389         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,MASK),
390         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
391         .info =         snd_ak4114_spdif_mask_info,
392         .get =          snd_ak4114_spdif_mask_get,
393 },
394 {
395         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
396         .name =         SNDRV_CTL_NAME_IEC958("",CAPTURE,DEFAULT),
397         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
398         .info =         snd_ak4114_spdif_info,
399         .get =          snd_ak4114_spdif_get,
400 },
401 {
402         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
403         .name =         "IEC958 Preample Capture Default",
404         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
405         .info =         snd_ak4114_spdif_pinfo,
406         .get =          snd_ak4114_spdif_pget,
407 },
408 {
409         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
410         .name =         "IEC958 Q-subcode Capture Default",
411         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
412         .info =         snd_ak4114_spdif_qinfo,
413         .get =          snd_ak4114_spdif_qget,
414 },
415 {
416         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
417         .name =         "IEC958 Audio",
418         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
419         .info =         snd_ak4114_in_bit_info,
420         .get =          snd_ak4114_in_bit_get,
421         .private_value = (1<<31) | (1<<8) | AK4114_REG_RCS0,
422 },
423 {
424         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
425         .name =         "IEC958 Non-PCM Bitstream",
426         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
427         .info =         snd_ak4114_in_bit_info,
428         .get =          snd_ak4114_in_bit_get,
429         .private_value = (6<<8) | AK4114_REG_RCS0,
430 },
431 {
432         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
433         .name =         "IEC958 DTS Bitstream",
434         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
435         .info =         snd_ak4114_in_bit_info,
436         .get =          snd_ak4114_in_bit_get,
437         .private_value = (3<<8) | AK4114_REG_RCS0,
438 },
439 {
440         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
441         .name =         "IEC958 PPL Lock Status",
442         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
443         .info =         snd_ak4114_in_bit_info,
444         .get =          snd_ak4114_in_bit_get,
445         .private_value = (1<<31) | (4<<8) | AK4114_REG_RCS0,
446 }
447 };
448
449 int snd_ak4114_build(struct ak4114 *ak4114,
450                      struct snd_pcm_substream *ply_substream,
451                      struct snd_pcm_substream *cap_substream)
452 {
453         struct snd_kcontrol *kctl;
454         unsigned int idx;
455         int err;
456
457         snd_assert(cap_substream, return -EINVAL);
458         ak4114->playback_substream = ply_substream;
459         ak4114->capture_substream = cap_substream;
460         for (idx = 0; idx < AK4114_CONTROLS; idx++) {
461                 kctl = snd_ctl_new1(&snd_ak4114_iec958_controls[idx], ak4114);
462                 if (kctl == NULL)
463                         return -ENOMEM;
464                 if (strstr(kctl->id.name, "Playback")) {
465                         if (ply_substream == NULL) {
466                                 snd_ctl_free_one(kctl);
467                                 ak4114->kctls[idx] = NULL;
468                                 continue;
469                         }
470                         kctl->id.device = ply_substream->pcm->device;
471                         kctl->id.subdevice = ply_substream->number;
472                 } else {
473                         kctl->id.device = cap_substream->pcm->device;
474                         kctl->id.subdevice = cap_substream->number;
475                 }
476                 err = snd_ctl_add(ak4114->card, kctl);
477                 if (err < 0)
478                         return err;
479                 ak4114->kctls[idx] = kctl;
480         }
481         /* trigger workq */
482         schedule_delayed_work(&ak4114->work, HZ / 10);
483         return 0;
484 }
485
486 /* notify kcontrols if any parameters are changed */
487 static void ak4114_notify(struct ak4114 *ak4114,
488                           unsigned char rcs0, unsigned char rcs1,
489                           unsigned char c0, unsigned char c1)
490 {
491         if (!ak4114->kctls[0])
492                 return;
493
494         if (rcs0 & AK4114_PAR)
495                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
496                                &ak4114->kctls[0]->id);
497         if (rcs0 & AK4114_V)
498                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
499                                &ak4114->kctls[1]->id);
500         if (rcs1 & AK4114_CCRC)
501                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
502                                &ak4114->kctls[2]->id);
503         if (rcs1 & AK4114_QCRC)
504                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
505                                &ak4114->kctls[3]->id);
506
507         /* rate change */
508         if (c1 & 0xf0)
509                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
510                                &ak4114->kctls[4]->id);
511
512         if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
513                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
514                                &ak4114->kctls[9]->id);
515         if (c0 & AK4114_QINT)
516                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
517                                &ak4114->kctls[10]->id);
518
519         if (c0 & AK4114_AUDION)
520                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
521                                &ak4114->kctls[11]->id);
522         if (c0 & AK4114_AUTO)
523                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
524                                &ak4114->kctls[12]->id);
525         if (c0 & AK4114_DTSCD)
526                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
527                                &ak4114->kctls[13]->id);
528         if (c0 & AK4114_UNLCK)
529                 snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
530                                &ak4114->kctls[14]->id);
531 }
532
533 int snd_ak4114_external_rate(struct ak4114 *ak4114)
534 {
535         unsigned char rcs1;
536
537         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
538         return external_rate(rcs1);
539 }
540
541 int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
542 {
543         struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
544         unsigned long _flags;
545         int res = 0;
546         unsigned char rcs0, rcs1;
547         unsigned char c0, c1;
548
549         rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
550         if (flags & AK4114_CHECK_NO_STAT)
551                 goto __rate;
552         rcs0 = reg_read(ak4114, AK4114_REG_RCS0);
553         spin_lock_irqsave(&ak4114->lock, _flags);
554         if (rcs0 & AK4114_PAR)
555                 ak4114->parity_errors++;
556         if (rcs1 & AK4114_V)
557                 ak4114->v_bit_errors++;
558         if (rcs1 & AK4114_CCRC)
559                 ak4114->ccrc_errors++;
560         if (rcs1 & AK4114_QCRC)
561                 ak4114->qcrc_errors++;
562         c0 = (ak4114->rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK)) ^
563                      (rcs0 & (AK4114_QINT | AK4114_CINT | AK4114_PEM | AK4114_AUDION | AK4114_AUTO | AK4114_UNLCK));
564         c1 = (ak4114->rcs1 & 0xf0) ^ (rcs1 & 0xf0);
565         ak4114->rcs0 = rcs0 & ~(AK4114_QINT | AK4114_CINT);
566         ak4114->rcs1 = rcs1;
567         spin_unlock_irqrestore(&ak4114->lock, _flags);
568
569         ak4114_notify(ak4114, rcs0, rcs1, c0, c1);
570         if (ak4114->change_callback && (c0 | c1) != 0)
571                 ak4114->change_callback(ak4114, c0, c1);
572
573       __rate:
574         /* compare rate */
575         res = external_rate(rcs1);
576         if (!(flags & AK4114_CHECK_NO_RATE) && runtime && runtime->rate != res) {
577                 snd_pcm_stream_lock_irqsave(ak4114->capture_substream, _flags);
578                 if (snd_pcm_running(ak4114->capture_substream)) {
579                         // printk(KERN_DEBUG "rate changed (%i <- %i)\n", runtime->rate, res);
580                         snd_pcm_stop(ak4114->capture_substream, SNDRV_PCM_STATE_DRAINING);
581                         res = 1;
582                 }
583                 snd_pcm_stream_unlock_irqrestore(ak4114->capture_substream, _flags);
584         }
585         return res;
586 }
587
588 static void ak4114_stats(struct work_struct *work)
589 {
590         struct ak4114 *chip = container_of(work, struct ak4114, work.work);
591
592         if (!chip->init)
593                 snd_ak4114_check_rate_and_errors(chip, 0);
594
595         schedule_delayed_work(&chip->work, HZ / 10);
596 }
597
598 EXPORT_SYMBOL(snd_ak4114_create);
599 EXPORT_SYMBOL(snd_ak4114_reg_write);
600 EXPORT_SYMBOL(snd_ak4114_reinit);
601 EXPORT_SYMBOL(snd_ak4114_build);
602 EXPORT_SYMBOL(snd_ak4114_external_rate);
603 EXPORT_SYMBOL(snd_ak4114_check_rate_and_errors);