e57e9cbe6a0f99aa36d8090a222c91b76b555771
[linux-2.6.git] / sound / i2c / cs8427.c
1 /*
2  *  Routines for control of the CS8427 via i2c bus
3  *  IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic
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 <linux/init.h>
26 #include <sound/core.h>
27 #include <sound/control.h>
28 #include <sound/pcm.h>
29 #include <sound/cs8427.h>
30 #include <sound/asoundef.h>
31
32 static void snd_cs8427_reset(struct snd_i2c_device *cs8427);
33
34 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
35 MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic");
36 MODULE_LICENSE("GPL");
37
38 #define CS8427_ADDR                     (0x20>>1) /* fixed address */
39
40 struct cs8427_stream {
41         struct snd_pcm_substream *substream;
42         char hw_status[24];             /* hardware status */
43         char def_status[24];            /* default status */
44         char pcm_status[24];            /* PCM private status */
45         char hw_udata[32];
46         struct snd_kcontrol *pcm_ctl;
47 };
48
49 struct cs8427 {
50         unsigned char regmap[0x14];     /* map of first 1 + 13 registers */
51         unsigned int rate;
52         unsigned int reset_timeout;
53         struct cs8427_stream playback;
54         struct cs8427_stream capture;
55 };
56
57 static unsigned char swapbits(unsigned char val)
58 {
59         int bit;
60         unsigned char res = 0;
61         for (bit = 0; bit < 8; bit++) {
62                 res <<= 1;
63                 res |= val & 1;
64                 val >>= 1;
65         }
66         return res;
67 }
68
69 int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
70                          unsigned char val)
71 {
72         int err;
73         unsigned char buf[2];
74
75         buf[0] = reg & 0x7f;
76         buf[1] = val;
77         if ((err = snd_i2c_sendbytes(device, buf, 2)) != 2) {
78                 snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x "
79                            "to CS8427 (%i)\n", buf[0], buf[1], err);
80                 return err < 0 ? err : -EIO;
81         }
82         return 0;
83 }
84
85 EXPORT_SYMBOL(snd_cs8427_reg_write);
86
87 static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg)
88 {
89         int err;
90         unsigned char buf;
91
92         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
93                 snd_printk(KERN_ERR "unable to send register 0x%x byte "
94                            "to CS8427\n", reg);
95                 return err < 0 ? err : -EIO;
96         }
97         if ((err = snd_i2c_readbytes(device, &buf, 1)) != 1) {
98                 snd_printk(KERN_ERR "unable to read register 0x%x byte "
99                            "from CS8427\n", reg);
100                 return err < 0 ? err : -EIO;
101         }
102         return buf;
103 }
104
105 static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata)
106 {
107         struct cs8427 *chip = device->private_data;
108         int err;
109
110         udata = udata ? CS8427_BSEL : 0;
111         if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) {
112                 chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL;
113                 chip->regmap[CS8427_REG_CSDATABUF] |= udata;
114                 err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF,
115                                            chip->regmap[CS8427_REG_CSDATABUF]);
116                 if (err < 0)
117                         return err;
118         }
119         return 0;
120 }
121
122 static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
123                                     int udata,
124                                     unsigned char *ndata,
125                                     int count)
126 {
127         struct cs8427 *chip = device->private_data;
128         char *hw_data = udata ?
129                 chip->playback.hw_udata : chip->playback.hw_status;
130         char data[32];
131         int err, idx;
132
133         if (!memcmp(hw_data, ndata, count))
134                 return 0;
135         if ((err = snd_cs8427_select_corudata(device, udata)) < 0)
136                 return err;
137         memcpy(hw_data, ndata, count);
138         if (udata) {
139                 memset(data, 0, sizeof(data));
140                 if (memcmp(hw_data, data, count) == 0) {
141                         chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK;
142                         chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS |
143                                 CS8427_EFTUI;
144                         err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF,
145                                                    chip->regmap[CS8427_REG_UDATABUF]);
146                         return err < 0 ? err : 0;
147                 }
148         }
149         data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
150         for (idx = 0; idx < count; idx++)
151                 data[idx + 1] = swapbits(ndata[idx]);
152         if (snd_i2c_sendbytes(device, data, count + 1) != count + 1)
153                 return -EIO;
154         return 1;
155 }
156
157 static void snd_cs8427_free(struct snd_i2c_device *device)
158 {
159         kfree(device->private_data);
160 }
161
162 int snd_cs8427_create(struct snd_i2c_bus *bus,
163                       unsigned char addr,
164                       unsigned int reset_timeout,
165                       struct snd_i2c_device **r_cs8427)
166 {
167         static unsigned char initvals1[] = {
168           CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
169           /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes,
170              TCBL=output */
171           CS8427_SWCLK | CS8427_TCBLDIR,
172           /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs,
173              normal stereo operation */
174           0x00,
175           /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial,
176              Rx=>serial */
177           CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER,
178           /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs,
179              output time base = OMCK, input time base = recovered input clock,
180              recovered input clock source is ILRCK changed to AES3INPUT
181              (workaround, see snd_cs8427_reset) */
182           CS8427_RXDILRCK,
183           /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S,
184              24-bit, 64*Fsi */
185           CS8427_SIDEL | CS8427_SILRPOL,
186           /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format
187              = I2S, 24-bit, 64*Fsi */
188           CS8427_SODEL | CS8427_SOLRPOL,
189         };
190         static unsigned char initvals2[] = {
191           CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC,
192           /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence,
193              biphase, parity status bits */
194           /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR,*/
195           0xff, /* set everything */
196           /* CS8427_REG_CSDATABUF:
197              Registers 32-55 window to CS buffer
198              Inhibit D->E transfers from overwriting first 5 bytes of CS data.
199              Inhibit D->E transfers (all) of CS data.
200              Allow E->F transfer of CS data.
201              One byte mode; both A/B channels get same written CB data.
202              A channel info is output to chip's EMPH* pin. */
203           CS8427_CBMR | CS8427_DETCI,
204           /* CS8427_REG_UDATABUF:
205              Use internal buffer to transmit User (U) data.
206              Chip's U pin is an output.
207              Transmit all O's for user data.
208              Inhibit D->E transfers.
209              Inhibit E->F transfers. */
210           CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
211         };
212         int err;
213         struct cs8427 *chip;
214         struct snd_i2c_device *device;
215         unsigned char buf[24];
216
217         if ((err = snd_i2c_device_create(bus, "CS8427",
218                                          CS8427_ADDR | (addr & 7),
219                                          &device)) < 0)
220                 return err;
221         chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
222         if (chip == NULL) {
223                 snd_i2c_device_free(device);
224                 return -ENOMEM;
225         }
226         device->private_free = snd_cs8427_free;
227         
228         snd_i2c_lock(bus);
229         err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
230         if (err != CS8427_VER8427A) {
231                 /* give second chance */
232                 snd_printk(KERN_WARNING "invalid CS8427 signature 0x%x: "
233                            "let me try again...\n", err);
234                 err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER);
235         }
236         if (err != CS8427_VER8427A) {
237                 snd_i2c_unlock(bus);
238                 snd_printk(KERN_ERR "unable to find CS8427 signature "
239                            "(expected 0x%x, read 0x%x),\n",
240                            CS8427_VER8427A, err);
241                 snd_printk(KERN_ERR "   initialization is not completed\n");
242                 return -EFAULT;
243         }
244         /* turn off run bit while making changes to configuration */
245         err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00);
246         if (err < 0)
247                 goto __fail;
248         /* send initial values */
249         memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6);
250         if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) {
251                 err = err < 0 ? err : -EIO;
252                 goto __fail;
253         }
254         /* Turn off CS8427 interrupt stuff that is not used in hardware */
255         memset(buf, 0, 7);
256         /* from address 9 to 15 */
257         buf[0] = 9;     /* register */
258         if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7)
259                 goto __fail;
260         /* send transfer initialization sequence */
261         memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3);
262         if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) {
263                 err = err < 0 ? err : -EIO;
264                 goto __fail;
265         }
266         /* write default channel status bytes */
267         buf[0] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 0));
268         buf[1] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 8));
269         buf[2] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 16));
270         buf[3] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 24));
271         memset(buf + 4, 0, 24 - 4);
272         if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0)
273                 goto __fail;
274         memcpy(chip->playback.def_status, buf, 24);
275         memcpy(chip->playback.pcm_status, buf, 24);
276         snd_i2c_unlock(bus);
277
278         /* turn on run bit and rock'n'roll */
279         if (reset_timeout < 1)
280                 reset_timeout = 1;
281         chip->reset_timeout = reset_timeout;
282         snd_cs8427_reset(device);
283
284 #if 0   // it's nice for read tests
285         {
286         char buf[128];
287         int xx;
288         buf[0] = 0x81;
289         snd_i2c_sendbytes(device, buf, 1);
290         snd_i2c_readbytes(device, buf, 127);
291         for (xx = 0; xx < 127; xx++)
292                 printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]);
293         }
294 #endif
295         
296         if (r_cs8427)
297                 *r_cs8427 = device;
298         return 0;
299
300       __fail:
301         snd_i2c_unlock(bus);
302         snd_i2c_device_free(device);
303         return err < 0 ? err : -EIO;
304 }
305
306 EXPORT_SYMBOL(snd_cs8427_create);
307
308 /*
309  * Reset the chip using run bit, also lock PLL using ILRCK and
310  * put back AES3INPUT. This workaround is described in latest
311  * CS8427 datasheet, otherwise TXDSERIAL will not work.
312  */
313 static void snd_cs8427_reset(struct snd_i2c_device *cs8427)
314 {
315         struct cs8427 *chip;
316         unsigned long end_time;
317         int data, aes3input = 0;
318
319         snd_assert(cs8427, return);
320         chip = cs8427->private_data;
321         snd_i2c_lock(cs8427->bus);
322         if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) ==
323             CS8427_RXDAES3INPUT)  /* AES3 bit is set */
324                 aes3input = 1;
325         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK);
326         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
327                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
328         udelay(200);
329         chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK;
330         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
331                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
332         udelay(200);
333         snd_i2c_unlock(cs8427->bus);
334         end_time = jiffies + chip->reset_timeout;
335         while (time_after_eq(end_time, jiffies)) {
336                 snd_i2c_lock(cs8427->bus);
337                 data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS);
338                 snd_i2c_unlock(cs8427->bus);
339                 if (!(data & CS8427_UNLOCK))
340                         break;
341                 schedule_timeout_uninterruptible(1);
342         }
343         snd_i2c_lock(cs8427->bus);
344         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK;
345         if (aes3input)
346                 chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT;
347         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
348                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
349         snd_i2c_unlock(cs8427->bus);
350 }
351
352 static int snd_cs8427_in_status_info(struct snd_kcontrol *kcontrol,
353                                      struct snd_ctl_elem_info *uinfo)
354 {
355         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
356         uinfo->count = 1;
357         uinfo->value.integer.min = 0;
358         uinfo->value.integer.max = 255;
359         return 0;
360 }
361
362 static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol,
363                                     struct snd_ctl_elem_value *ucontrol)
364 {
365         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
366         int data;
367
368         snd_i2c_lock(device->bus);
369         data = snd_cs8427_reg_read(device, kcontrol->private_value);
370         snd_i2c_unlock(device->bus);
371         if (data < 0)
372                 return data;
373         ucontrol->value.integer.value[0] = data;
374         return 0;
375 }
376
377 static int snd_cs8427_qsubcode_info(struct snd_kcontrol *kcontrol,
378                                     struct snd_ctl_elem_info *uinfo)
379 {
380         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
381         uinfo->count = 10;
382         return 0;
383 }
384
385 static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol,
386                                    struct snd_ctl_elem_value *ucontrol)
387 {
388         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
389         unsigned char reg = CS8427_REG_QSUBCODE;
390         int err;
391
392         snd_i2c_lock(device->bus);
393         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
394                 snd_printk(KERN_ERR "unable to send register 0x%x byte "
395                            "to CS8427\n", reg);
396                 snd_i2c_unlock(device->bus);
397                 return err < 0 ? err : -EIO;
398         }
399         err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10);
400         if (err != 10) {
401                 snd_printk(KERN_ERR "unable to read Q-subcode bytes "
402                            "from CS8427\n");
403                 snd_i2c_unlock(device->bus);
404                 return err < 0 ? err : -EIO;
405         }
406         snd_i2c_unlock(device->bus);
407         return 0;
408 }
409
410 static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol,
411                                  struct snd_ctl_elem_info *uinfo)
412 {
413         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
414         uinfo->count = 1;
415         return 0;
416 }
417
418 static int snd_cs8427_spdif_get(struct snd_kcontrol *kcontrol,
419                                 struct snd_ctl_elem_value *ucontrol)
420 {
421         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
422         struct cs8427 *chip = device->private_data;
423         
424         snd_i2c_lock(device->bus);
425         memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24);
426         snd_i2c_unlock(device->bus);
427         return 0;
428 }
429
430 static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol,
431                                 struct snd_ctl_elem_value *ucontrol)
432 {
433         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
434         struct cs8427 *chip = device->private_data;
435         unsigned char *status = kcontrol->private_value ?
436                 chip->playback.pcm_status : chip->playback.def_status;
437         struct snd_pcm_runtime *runtime = chip->playback.substream ?
438                 chip->playback.substream->runtime : NULL;
439         int err, change;
440
441         snd_i2c_lock(device->bus);
442         change = memcmp(ucontrol->value.iec958.status, status, 24) != 0;
443         memcpy(status, ucontrol->value.iec958.status, 24);
444         if (change && (kcontrol->private_value ?
445                        runtime != NULL : runtime == NULL)) {
446                 err = snd_cs8427_send_corudata(device, 0, status, 24);
447                 if (err < 0)
448                         change = err;
449         }
450         snd_i2c_unlock(device->bus);
451         return change;
452 }
453
454 static int snd_cs8427_spdif_mask_info(struct snd_kcontrol *kcontrol,
455                                       struct snd_ctl_elem_info *uinfo)
456 {
457         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
458         uinfo->count = 1;
459         return 0;
460 }
461
462 static int snd_cs8427_spdif_mask_get(struct snd_kcontrol *kcontrol,
463                                       struct snd_ctl_elem_value *ucontrol)
464 {
465         memset(ucontrol->value.iec958.status, 0xff, 24);
466         return 0;
467 }
468
469 static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
470 {
471         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
472         .info =         snd_cs8427_in_status_info,
473         .name =         "IEC958 CS8427 Input Status",
474         .access =       (SNDRV_CTL_ELEM_ACCESS_READ |
475                          SNDRV_CTL_ELEM_ACCESS_VOLATILE),
476         .get =          snd_cs8427_in_status_get,
477         .private_value = 15,
478 },
479 {
480         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
481         .info =         snd_cs8427_in_status_info,
482         .name =         "IEC958 CS8427 Error Status",
483         .access =       (SNDRV_CTL_ELEM_ACCESS_READ |
484                          SNDRV_CTL_ELEM_ACCESS_VOLATILE),
485         .get =          snd_cs8427_in_status_get,
486         .private_value = 16,
487 },
488 {
489         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
490         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
491         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
492         .info =         snd_cs8427_spdif_mask_info,
493         .get =          snd_cs8427_spdif_mask_get,
494 },
495 {
496         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
497         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
498         .info =         snd_cs8427_spdif_info,
499         .get =          snd_cs8427_spdif_get,
500         .put =          snd_cs8427_spdif_put,
501         .private_value = 0
502 },
503 {
504         .access =       (SNDRV_CTL_ELEM_ACCESS_READWRITE |
505                          SNDRV_CTL_ELEM_ACCESS_INACTIVE),
506         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
507         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
508         .info =         snd_cs8427_spdif_info,
509         .get =          snd_cs8427_spdif_get,
510         .put =          snd_cs8427_spdif_put,
511         .private_value = 1
512 },
513 {
514         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
515         .info =         snd_cs8427_qsubcode_info,
516         .name =         "IEC958 Q-subcode Capture Default",
517         .access =       (SNDRV_CTL_ELEM_ACCESS_READ |
518                          SNDRV_CTL_ELEM_ACCESS_VOLATILE),
519         .get =          snd_cs8427_qsubcode_get
520 }};
521
522 int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427,
523                             struct snd_pcm_substream *play_substream,
524                             struct snd_pcm_substream *cap_substream)
525 {
526         struct cs8427 *chip = cs8427->private_data;
527         struct snd_kcontrol *kctl;
528         unsigned int idx;
529         int err;
530
531         snd_assert(play_substream && cap_substream, return -EINVAL);
532         for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) {
533                 kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427);
534                 if (kctl == NULL)
535                         return -ENOMEM;
536                 kctl->id.device = play_substream->pcm->device;
537                 kctl->id.subdevice = play_substream->number;
538                 err = snd_ctl_add(cs8427->bus->card, kctl);
539                 if (err < 0)
540                         return err;
541                 if (! strcmp(kctl->id.name,
542                              SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM)))
543                         chip->playback.pcm_ctl = kctl;
544         }
545
546         chip->playback.substream = play_substream;
547         chip->capture.substream = cap_substream;
548         snd_assert(chip->playback.pcm_ctl, return -EIO);
549         return 0;
550 }
551
552 EXPORT_SYMBOL(snd_cs8427_iec958_build);
553
554 int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active)
555 {
556         struct cs8427 *chip;
557
558         snd_assert(cs8427, return -ENXIO);
559         chip = cs8427->private_data;
560         if (active)
561                 memcpy(chip->playback.pcm_status,
562                        chip->playback.def_status, 24);
563         chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
564         snd_ctl_notify(cs8427->bus->card,
565                        SNDRV_CTL_EVENT_MASK_VALUE | SNDRV_CTL_EVENT_MASK_INFO,
566                        &chip->playback.pcm_ctl->id);
567         return 0;
568 }
569
570 EXPORT_SYMBOL(snd_cs8427_iec958_active);
571
572 int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate)
573 {
574         struct cs8427 *chip;
575         char *status;
576         int err, reset;
577
578         snd_assert(cs8427, return -ENXIO);
579         chip = cs8427->private_data;
580         status = chip->playback.pcm_status;
581         snd_i2c_lock(cs8427->bus);
582         if (status[0] & IEC958_AES0_PROFESSIONAL) {
583                 status[0] &= ~IEC958_AES0_PRO_FS;
584                 switch (rate) {
585                 case 32000: status[0] |= IEC958_AES0_PRO_FS_32000; break;
586                 case 44100: status[0] |= IEC958_AES0_PRO_FS_44100; break;
587                 case 48000: status[0] |= IEC958_AES0_PRO_FS_48000; break;
588                 default: status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
589                 }
590         } else {
591                 status[3] &= ~IEC958_AES3_CON_FS;
592                 switch (rate) {
593                 case 32000: status[3] |= IEC958_AES3_CON_FS_32000; break;
594                 case 44100: status[3] |= IEC958_AES3_CON_FS_44100; break;
595                 case 48000: status[3] |= IEC958_AES3_CON_FS_48000; break;
596                 }
597         }
598         err = snd_cs8427_send_corudata(cs8427, 0, status, 24);
599         if (err > 0)
600                 snd_ctl_notify(cs8427->bus->card,
601                                SNDRV_CTL_EVENT_MASK_VALUE,
602                                &chip->playback.pcm_ctl->id);
603         reset = chip->rate != rate;
604         chip->rate = rate;
605         snd_i2c_unlock(cs8427->bus);
606         if (reset)
607                 snd_cs8427_reset(cs8427);
608         return err < 0 ? err : 0;
609 }
610
611 EXPORT_SYMBOL(snd_cs8427_iec958_pcm);
612
613 static int __init alsa_cs8427_module_init(void)
614 {
615         return 0;
616 }
617
618 static void __exit alsa_cs8427_module_exit(void)
619 {
620 }
621
622 module_init(alsa_cs8427_module_init)
623 module_exit(alsa_cs8427_module_exit)