[PATCH] m68k: convert atari irq code
[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@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 <linux/init.h>
27 #include <sound/core.h>
28 #include <sound/control.h>
29 #include <sound/pcm.h>
30 #include <sound/cs8427.h>
31 #include <sound/asoundef.h>
32
33 static void snd_cs8427_reset(struct snd_i2c_device *cs8427);
34
35 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
36 MODULE_DESCRIPTION("IEC958 (S/PDIF) receiver & transmitter by Cirrus Logic");
37 MODULE_LICENSE("GPL");
38
39 #define CS8427_ADDR                     (0x20>>1) /* fixed address */
40
41 struct cs8427_stream {
42         struct snd_pcm_substream *substream;
43         char hw_status[24];             /* hardware status */
44         char def_status[24];            /* default status */
45         char pcm_status[24];            /* PCM private status */
46         char hw_udata[32];
47         struct snd_kcontrol *pcm_ctl;
48 };
49
50 struct cs8427 {
51         unsigned char regmap[0x14];     /* map of first 1 + 13 registers */
52         unsigned int rate;
53         unsigned int reset_timeout;
54         struct cs8427_stream playback;
55         struct cs8427_stream capture;
56 };
57
58 static unsigned char swapbits(unsigned char val)
59 {
60         int bit;
61         unsigned char res = 0;
62         for (bit = 0; bit < 8; bit++) {
63                 res <<= 1;
64                 res |= val & 1;
65                 val >>= 1;
66         }
67         return res;
68 }
69
70 int snd_cs8427_reg_write(struct snd_i2c_device *device, unsigned char reg,
71                          unsigned char val)
72 {
73         int err;
74         unsigned char buf[2];
75
76         buf[0] = reg & 0x7f;
77         buf[1] = val;
78         if ((err = snd_i2c_sendbytes(device, buf, 2)) != 2) {
79                 snd_printk(KERN_ERR "unable to send bytes 0x%02x:0x%02x to CS8427 (%i)\n", buf[0], buf[1], err);
80                 return err < 0 ? err : -EIO;
81         }
82         return 0;
83 }
84
85 static int snd_cs8427_reg_read(struct snd_i2c_device *device, unsigned char reg)
86 {
87         int err;
88         unsigned char buf;
89
90         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
91                 snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg);
92                 return err < 0 ? err : -EIO;
93         }
94         if ((err = snd_i2c_readbytes(device, &buf, 1)) != 1) {
95                 snd_printk(KERN_ERR "unable to read register 0x%x byte from CS8427\n", reg);
96                 return err < 0 ? err : -EIO;
97         }
98         return buf;
99 }
100
101 static int snd_cs8427_select_corudata(struct snd_i2c_device *device, int udata)
102 {
103         struct cs8427 *chip = device->private_data;
104         int err;
105
106         udata = udata ? CS8427_BSEL : 0;
107         if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) {
108                 chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL;
109                 chip->regmap[CS8427_REG_CSDATABUF] |= udata;
110                 err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF,
111                                            chip->regmap[CS8427_REG_CSDATABUF]);
112                 if (err < 0)
113                         return err;
114         }
115         return 0;
116 }
117
118 static int snd_cs8427_send_corudata(struct snd_i2c_device *device,
119                                     int udata,
120                                     unsigned char *ndata,
121                                     int count)
122 {
123         struct cs8427 *chip = device->private_data;
124         char *hw_data = udata ? chip->playback.hw_udata : chip->playback.hw_status;
125         char data[32];
126         int err, idx;
127
128         if (!memcmp(hw_data, ndata, count))
129                 return 0;
130         if ((err = snd_cs8427_select_corudata(device, udata)) < 0)
131                 return err;
132         memcpy(hw_data, ndata, count);
133         if (udata) {
134                 memset(data, 0, sizeof(data));
135                 if (memcmp(hw_data, data, count) == 0) {
136                         chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK;
137                         chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS | CS8427_EFTUI;
138                         if ((err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF,
139                                                         chip->regmap[CS8427_REG_UDATABUF])) < 0)
140                                 return err;
141                         return 0;
142                 }
143         }
144         data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
145         for (idx = 0; idx < count; idx++)
146                 data[idx + 1] = swapbits(ndata[idx]);
147         if (snd_i2c_sendbytes(device, data, count + 1) != count + 1)
148                 return -EIO;
149         return 1;
150 }
151
152 static void snd_cs8427_free(struct snd_i2c_device *device)
153 {
154         kfree(device->private_data);
155 }
156
157 int snd_cs8427_create(struct snd_i2c_bus *bus,
158                       unsigned char addr,
159                       unsigned int reset_timeout,
160                       struct snd_i2c_device **r_cs8427)
161 {
162         static unsigned char initvals1[] = {
163           CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
164           /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes, TCBL=output */
165           CS8427_SWCLK | CS8427_TCBLDIR,
166           /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs, normal stereo operation */
167           0x00,
168           /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial, Rx=>serial */
169           CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER,
170           /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs, output time base = OMCK, input time base =
171              recovered input clock, recovered input clock source is ILRCK changed to AES3INPUT (workaround, see snd_cs8427_reset) */
172           CS8427_RXDILRCK,
173           /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S, 24-bit, 64*Fsi */
174           CS8427_SIDEL | CS8427_SILRPOL,
175           /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format = I2S, 24-bit, 64*Fsi */
176           CS8427_SODEL | CS8427_SOLRPOL,
177         };
178         static unsigned char initvals2[] = {
179           CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC,
180           /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence, biphase, parity status bits */
181           /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR, */
182           0xff, /* set everything */
183           /* CS8427_REG_CSDATABUF:
184              Registers 32-55 window to CS buffer
185              Inhibit D->E transfers from overwriting first 5 bytes of CS data.
186              Inhibit D->E transfers (all) of CS data.
187              Allow E->F transfer of CS data.
188              One byte mode; both A/B channels get same written CB data.
189              A channel info is output to chip's EMPH* pin. */
190           CS8427_CBMR | CS8427_DETCI,
191           /* CS8427_REG_UDATABUF:
192              Use internal buffer to transmit User (U) data.
193              Chip's U pin is an output.
194              Transmit all O's for user data.
195              Inhibit D->E transfers.
196              Inhibit E->F transfers. */
197           CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
198         };
199         int err;
200         struct cs8427 *chip;
201         struct snd_i2c_device *device;
202         unsigned char buf[24];
203
204         if ((err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7),
205                                          &device)) < 0)
206                 return err;
207         chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
208         if (chip == NULL) {
209                 snd_i2c_device_free(device);
210                 return -ENOMEM;
211         }
212         device->private_free = snd_cs8427_free;
213         
214         snd_i2c_lock(bus);
215         if ((err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER)) !=
216             CS8427_VER8427A) {
217                 snd_i2c_unlock(bus);
218                 snd_printk(KERN_ERR "unable to find CS8427 signature "
219                            "(expected 0x%x, read 0x%x),\n",
220                            CS8427_VER8427A, err);
221                 snd_printk(KERN_ERR "   initialization is not completed\n");
222                 return -EFAULT;
223         }
224         /* turn off run bit while making changes to configuration */
225         if ((err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00)) < 0)
226                 goto __fail;
227         /* send initial values */
228         memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6);
229         if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) {
230                 err = err < 0 ? err : -EIO;
231                 goto __fail;
232         }
233         /* Turn off CS8427 interrupt stuff that is not used in hardware */
234         memset(buf, 0, 7);
235         /* from address 9 to 15 */
236         buf[0] = 9;     /* register */
237         if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7)
238                 goto __fail;
239         /* send transfer initialization sequence */
240         memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3);
241         if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) {
242                 err = err < 0 ? err : -EIO;
243                 goto __fail;
244         }
245         /* write default channel status bytes */
246         buf[0] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 0));
247         buf[1] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 8));
248         buf[2] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 16));
249         buf[3] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 24));
250         memset(buf + 4, 0, 24 - 4);
251         if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0)
252                 goto __fail;
253         memcpy(chip->playback.def_status, buf, 24);
254         memcpy(chip->playback.pcm_status, buf, 24);
255         snd_i2c_unlock(bus);
256
257         /* turn on run bit and rock'n'roll */
258         if (reset_timeout < 1)
259                 reset_timeout = 1;
260         chip->reset_timeout = reset_timeout;
261         snd_cs8427_reset(device);
262
263 #if 0   // it's nice for read tests
264         {
265         char buf[128];
266         int xx;
267         buf[0] = 0x81;
268         snd_i2c_sendbytes(device, buf, 1);
269         snd_i2c_readbytes(device, buf, 127);
270         for (xx = 0; xx < 127; xx++)
271                 printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]);
272         }
273 #endif
274         
275         if (r_cs8427)
276                 *r_cs8427 = device;
277         return 0;
278
279       __fail:
280         snd_i2c_unlock(bus);
281         snd_i2c_device_free(device);
282         return err < 0 ? err : -EIO;
283 }
284
285 /*
286  * Reset the chip using run bit, also lock PLL using ILRCK and
287  * put back AES3INPUT. This workaround is described in latest
288  * CS8427 datasheet, otherwise TXDSERIAL will not work.
289  */
290 static void snd_cs8427_reset(struct snd_i2c_device *cs8427)
291 {
292         struct cs8427 *chip;
293         unsigned long end_time;
294         int data, aes3input = 0;
295
296         snd_assert(cs8427, return);
297         chip = cs8427->private_data;
298         snd_i2c_lock(cs8427->bus);
299         if ((chip->regmap[CS8427_REG_CLOCKSOURCE] & CS8427_RXDAES3INPUT) == CS8427_RXDAES3INPUT)  /* AES3 bit is set */
300                 aes3input = 1;
301         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK);
302         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
303                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
304         udelay(200);
305         chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK;
306         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
307                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
308         udelay(200);
309         snd_i2c_unlock(cs8427->bus);
310         end_time = jiffies + chip->reset_timeout;
311         while (time_after_eq(end_time, jiffies)) {
312                 snd_i2c_lock(cs8427->bus);
313                 data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS);
314                 snd_i2c_unlock(cs8427->bus);
315                 if (!(data & CS8427_UNLOCK))
316                         break;
317                 schedule_timeout_uninterruptible(1);
318         }
319         snd_i2c_lock(cs8427->bus);
320         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK;
321         if (aes3input)
322                 chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT;
323         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE,
324                              chip->regmap[CS8427_REG_CLOCKSOURCE]);
325         snd_i2c_unlock(cs8427->bus);
326 }
327
328 static int snd_cs8427_in_status_info(struct snd_kcontrol *kcontrol,
329                                      struct snd_ctl_elem_info *uinfo)
330 {
331         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
332         uinfo->count = 1;
333         uinfo->value.integer.min = 0;
334         uinfo->value.integer.max = 255;
335         return 0;
336 }
337
338 static int snd_cs8427_in_status_get(struct snd_kcontrol *kcontrol,
339                                     struct snd_ctl_elem_value *ucontrol)
340 {
341         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
342         int data;
343
344         snd_i2c_lock(device->bus);
345         data = snd_cs8427_reg_read(device, kcontrol->private_value);
346         snd_i2c_unlock(device->bus);
347         if (data < 0)
348                 return data;
349         ucontrol->value.integer.value[0] = data;
350         return 0;
351 }
352
353 static int snd_cs8427_qsubcode_info(struct snd_kcontrol *kcontrol,
354                                     struct snd_ctl_elem_info *uinfo)
355 {
356         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
357         uinfo->count = 10;
358         return 0;
359 }
360
361 static int snd_cs8427_qsubcode_get(struct snd_kcontrol *kcontrol,
362                                    struct snd_ctl_elem_value *ucontrol)
363 {
364         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
365         unsigned char reg = CS8427_REG_QSUBCODE;
366         int err;
367
368         snd_i2c_lock(device->bus);
369         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
370                 snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg);
371                 snd_i2c_unlock(device->bus);
372                 return err < 0 ? err : -EIO;
373         }
374         if ((err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10)) != 10) {
375                 snd_printk(KERN_ERR "unable to read Q-subcode bytes from CS8427\n");
376                 snd_i2c_unlock(device->bus);
377                 return err < 0 ? err : -EIO;
378         }
379         snd_i2c_unlock(device->bus);
380         return 0;
381 }
382
383 static int snd_cs8427_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
384 {
385         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
386         uinfo->count = 1;
387         return 0;
388 }
389
390 static int snd_cs8427_spdif_get(struct snd_kcontrol *kcontrol,
391                                 struct snd_ctl_elem_value *ucontrol)
392 {
393         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
394         struct cs8427 *chip = device->private_data;
395         
396         snd_i2c_lock(device->bus);
397         memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24);
398         snd_i2c_unlock(device->bus);
399         return 0;
400 }
401
402 static int snd_cs8427_spdif_put(struct snd_kcontrol *kcontrol,
403                                 struct snd_ctl_elem_value *ucontrol)
404 {
405         struct snd_i2c_device *device = snd_kcontrol_chip(kcontrol);
406         struct cs8427 *chip = device->private_data;
407         unsigned char *status = kcontrol->private_value ?
408                 chip->playback.pcm_status : chip->playback.def_status;
409         struct snd_pcm_runtime *runtime = chip->playback.substream ?
410                 chip->playback.substream->runtime : NULL;
411         int err, change;
412
413         snd_i2c_lock(device->bus);
414         change = memcmp(ucontrol->value.iec958.status, status, 24) != 0;
415         memcpy(status, ucontrol->value.iec958.status, 24);
416         if (change && (kcontrol->private_value ? runtime != NULL : runtime == NULL)) {
417                 err = snd_cs8427_send_corudata(device, 0, status, 24);
418                 if (err < 0)
419                         change = err;
420         }
421         snd_i2c_unlock(device->bus);
422         return change;
423 }
424
425 static int snd_cs8427_spdif_mask_info(struct snd_kcontrol *kcontrol,
426                                       struct snd_ctl_elem_info *uinfo)
427 {
428         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
429         uinfo->count = 1;
430         return 0;
431 }
432
433 static int snd_cs8427_spdif_mask_get(struct snd_kcontrol *kcontrol,
434                                       struct snd_ctl_elem_value *ucontrol)
435 {
436         memset(ucontrol->value.iec958.status, 0xff, 24);
437         return 0;
438 }
439
440 static struct snd_kcontrol_new snd_cs8427_iec958_controls[] = {
441 {
442         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
443         .info =         snd_cs8427_in_status_info,
444         .name =         "IEC958 CS8427 Input Status",
445         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
446         .get =          snd_cs8427_in_status_get,
447         .private_value = 15,
448 },
449 {
450         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
451         .info =         snd_cs8427_in_status_info,
452         .name =         "IEC958 CS8427 Error Status",
453         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
454         .get =          snd_cs8427_in_status_get,
455         .private_value = 16,
456 },
457 {
458         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
459         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
460         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
461         .info =         snd_cs8427_spdif_mask_info,
462         .get =          snd_cs8427_spdif_mask_get,
463 },
464 {
465         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
466         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
467         .info =         snd_cs8427_spdif_info,
468         .get =          snd_cs8427_spdif_get,
469         .put =          snd_cs8427_spdif_put,
470         .private_value = 0
471 },
472 {
473         .access =       SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
474         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
475         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
476         .info =         snd_cs8427_spdif_info,
477         .get =          snd_cs8427_spdif_get,
478         .put =          snd_cs8427_spdif_put,
479         .private_value = 1
480 },
481 {
482         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
483         .info =         snd_cs8427_qsubcode_info,
484         .name =         "IEC958 Q-subcode Capture Default",
485         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
486         .get =          snd_cs8427_qsubcode_get
487 }};
488
489 int snd_cs8427_iec958_build(struct snd_i2c_device *cs8427,
490                             struct snd_pcm_substream *play_substream,
491                             struct snd_pcm_substream *cap_substream)
492 {
493         struct cs8427 *chip = cs8427->private_data;
494         struct snd_kcontrol *kctl;
495         unsigned int idx;
496         int err;
497
498         snd_assert(play_substream && cap_substream, return -EINVAL);
499         for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) {
500                 kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427);
501                 if (kctl == NULL)
502                         return -ENOMEM;
503                 kctl->id.device = play_substream->pcm->device;
504                 kctl->id.subdevice = play_substream->number;
505                 err = snd_ctl_add(cs8427->bus->card, kctl);
506                 if (err < 0)
507                         return err;
508                 if (!strcmp(kctl->id.name, SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM)))
509                         chip->playback.pcm_ctl = kctl;
510         }
511
512         chip->playback.substream = play_substream;
513         chip->capture.substream = cap_substream;
514         snd_assert(chip->playback.pcm_ctl, return -EIO);
515         return 0;
516 }
517
518 int snd_cs8427_iec958_active(struct snd_i2c_device *cs8427, int active)
519 {
520         struct cs8427 *chip;
521
522         snd_assert(cs8427, return -ENXIO);
523         chip = cs8427->private_data;
524         if (active)
525                 memcpy(chip->playback.pcm_status, chip->playback.def_status, 24);
526         chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
527         snd_ctl_notify(cs8427->bus->card, SNDRV_CTL_EVENT_MASK_VALUE |
528                                           SNDRV_CTL_EVENT_MASK_INFO, &chip->playback.pcm_ctl->id);
529         return 0;
530 }
531
532 int snd_cs8427_iec958_pcm(struct snd_i2c_device *cs8427, unsigned int rate)
533 {
534         struct cs8427 *chip;
535         char *status;
536         int err, reset;
537
538         snd_assert(cs8427, return -ENXIO);
539         chip = cs8427->private_data;
540         status = chip->playback.pcm_status;
541         snd_i2c_lock(cs8427->bus);
542         if (status[0] & IEC958_AES0_PROFESSIONAL) {
543                 status[0] &= ~IEC958_AES0_PRO_FS;
544                 switch (rate) {
545                 case 32000: status[0] |= IEC958_AES0_PRO_FS_32000; break;
546                 case 44100: status[0] |= IEC958_AES0_PRO_FS_44100; break;
547                 case 48000: status[0] |= IEC958_AES0_PRO_FS_48000; break;
548                 default: status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
549                 }
550         } else {
551                 status[3] &= ~IEC958_AES3_CON_FS;
552                 switch (rate) {
553                 case 32000: status[3] |= IEC958_AES3_CON_FS_32000; break;
554                 case 44100: status[3] |= IEC958_AES3_CON_FS_44100; break;
555                 case 48000: status[3] |= IEC958_AES3_CON_FS_48000; break;
556                 }
557         }
558         err = snd_cs8427_send_corudata(cs8427, 0, status, 24);
559         if (err > 0)
560                 snd_ctl_notify(cs8427->bus->card,
561                                SNDRV_CTL_EVENT_MASK_VALUE,
562                                &chip->playback.pcm_ctl->id);
563         reset = chip->rate != rate;
564         chip->rate = rate;
565         snd_i2c_unlock(cs8427->bus);
566         if (reset)
567                 snd_cs8427_reset(cs8427);
568         return err < 0 ? err : 0;
569 }
570
571 static int __init alsa_cs8427_module_init(void)
572 {
573         return 0;
574 }
575
576 static void __exit alsa_cs8427_module_exit(void)
577 {
578 }
579
580 module_init(alsa_cs8427_module_init)
581 module_exit(alsa_cs8427_module_exit)
582
583 EXPORT_SYMBOL(snd_cs8427_create);
584 EXPORT_SYMBOL(snd_cs8427_reset);
585 EXPORT_SYMBOL(snd_cs8427_reg_write);
586 EXPORT_SYMBOL(snd_cs8427_iec958_build);
587 EXPORT_SYMBOL(snd_cs8427_iec958_active);
588 EXPORT_SYMBOL(snd_cs8427_iec958_pcm);