[ALSA] Fix schedule_timeout usage
[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(snd_i2c_device_t *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 typedef struct {
42         snd_pcm_substream_t *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         snd_kcontrol_t *pcm_ctl;
48 } cs8427_stream_t;
49
50 typedef struct {
51         unsigned char regmap[0x14];     /* map of first 1 + 13 registers */
52         unsigned int rate;
53         unsigned int reset_timeout;
54         cs8427_stream_t playback;
55         cs8427_stream_t capture;
56 } cs8427_t;
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(snd_i2c_device_t *device, unsigned char reg, 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 to CS8427 (%i)\n", buf[0], buf[1], err);
79                 return err < 0 ? err : -EIO;
80         }
81         return 0;
82 }
83
84 static int snd_cs8427_reg_read(snd_i2c_device_t *device, unsigned char reg)
85 {
86         int err;
87         unsigned char buf;
88
89         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
90                 snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg);
91                 return err < 0 ? err : -EIO;
92         }
93         if ((err = snd_i2c_readbytes(device, &buf, 1)) != 1) {
94                 snd_printk(KERN_ERR "unable to read register 0x%x byte from CS8427\n", reg);
95                 return err < 0 ? err : -EIO;
96         }
97         return buf;
98 }
99
100 static int snd_cs8427_select_corudata(snd_i2c_device_t *device, int udata)
101 {
102         cs8427_t *chip = device->private_data;
103         int err;
104
105         udata = udata ? CS8427_BSEL : 0;
106         if (udata != (chip->regmap[CS8427_REG_CSDATABUF] & udata)) {
107                 chip->regmap[CS8427_REG_CSDATABUF] &= ~CS8427_BSEL;
108                 chip->regmap[CS8427_REG_CSDATABUF] |= udata;
109                 err = snd_cs8427_reg_write(device, CS8427_REG_CSDATABUF, chip->regmap[CS8427_REG_CSDATABUF]);
110                 if (err < 0)
111                         return err;
112         }
113         return 0;
114 }
115
116 static int snd_cs8427_send_corudata(snd_i2c_device_t *device,
117                                     int udata,
118                                     unsigned char *ndata,
119                                     int count)
120 {
121         cs8427_t *chip = device->private_data;
122         char *hw_data = udata ? chip->playback.hw_udata : chip->playback.hw_status;
123         char data[32];
124         int err, idx;
125
126         if (!memcmp(hw_data, ndata, count))
127                 return 0;
128         if ((err = snd_cs8427_select_corudata(device, udata)) < 0)
129                 return err;
130         memcpy(hw_data, ndata, count);
131         if (udata) {
132                 memset(data, 0, sizeof(data));
133                 if (memcmp(hw_data, data, count) == 0) {
134                         chip->regmap[CS8427_REG_UDATABUF] &= ~CS8427_UBMMASK;
135                         chip->regmap[CS8427_REG_UDATABUF] |= CS8427_UBMZEROS | CS8427_EFTUI;
136                         if ((err = snd_cs8427_reg_write(device, CS8427_REG_UDATABUF, chip->regmap[CS8427_REG_UDATABUF])) < 0)
137                                 return err;
138                         return 0;
139                 }
140         }
141         data[0] = CS8427_REG_AUTOINC | CS8427_REG_CORU_DATABUF;
142         for (idx = 0; idx < count; idx++)
143                 data[idx + 1] = swapbits(ndata[idx]);
144         if (snd_i2c_sendbytes(device, data, count + 1) != count + 1)
145                 return -EIO;
146         return 1;
147 }
148
149 static void snd_cs8427_free(snd_i2c_device_t *device)
150 {
151         kfree(device->private_data);
152 }
153
154 int snd_cs8427_create(snd_i2c_bus_t *bus,
155                       unsigned char addr,
156                       unsigned int reset_timeout,
157                       snd_i2c_device_t **r_cs8427)
158 {
159         static unsigned char initvals1[] = {
160           CS8427_REG_CONTROL1 | CS8427_REG_AUTOINC,
161           /* CS8427_REG_CONTROL1: RMCK to OMCK, valid PCM audio, disable mutes, TCBL=output */
162           CS8427_SWCLK | CS8427_TCBLDIR,
163           /* CS8427_REG_CONTROL2: hold last valid audio sample, RMCK=256*Fs, normal stereo operation */
164           0x00,
165           /* CS8427_REG_DATAFLOW: output drivers normal operation, Tx<=serial, Rx=>serial */
166           CS8427_TXDSERIAL | CS8427_SPDAES3RECEIVER,
167           /* CS8427_REG_CLOCKSOURCE: Run off, CMCK=256*Fs, output time base = OMCK, input time base =
168              recovered input clock, recovered input clock source is ILRCK changed to AES3INPUT (workaround, see snd_cs8427_reset) */
169           CS8427_RXDILRCK,
170           /* CS8427_REG_SERIALINPUT: Serial audio input port data format = I2S, 24-bit, 64*Fsi */
171           CS8427_SIDEL | CS8427_SILRPOL,
172           /* CS8427_REG_SERIALOUTPUT: Serial audio output port data format = I2S, 24-bit, 64*Fsi */
173           CS8427_SODEL | CS8427_SOLRPOL,
174         };
175         static unsigned char initvals2[] = {
176           CS8427_REG_RECVERRMASK | CS8427_REG_AUTOINC,
177           /* CS8427_REG_RECVERRMASK: unmask the input PLL clock, V, confidence, biphase, parity status bits */
178           /* CS8427_UNLOCK | CS8427_V | CS8427_CONF | CS8427_BIP | CS8427_PAR, */
179           0xff, /* set everything */
180           /* CS8427_REG_CSDATABUF:
181              Registers 32-55 window to CS buffer
182              Inhibit D->E transfers from overwriting first 5 bytes of CS data.
183              Inhibit D->E transfers (all) of CS data.
184              Allow E->F transfer of CS data.
185              One byte mode; both A/B channels get same written CB data.
186              A channel info is output to chip's EMPH* pin. */
187           CS8427_CBMR | CS8427_DETCI,
188           /* CS8427_REG_UDATABUF:
189              Use internal buffer to transmit User (U) data.
190              Chip's U pin is an output.
191              Transmit all O's for user data.
192              Inhibit D->E transfers.
193              Inhibit E->F transfers. */
194           CS8427_UD | CS8427_EFTUI | CS8427_DETUI,
195         };
196         int err;
197         cs8427_t *chip;
198         snd_i2c_device_t *device;
199         unsigned char buf[24];
200
201         if ((err = snd_i2c_device_create(bus, "CS8427", CS8427_ADDR | (addr & 7), &device)) < 0)
202                 return err;
203         chip = device->private_data = kzalloc(sizeof(*chip), GFP_KERNEL);
204         if (chip == NULL) {
205                 snd_i2c_device_free(device);
206                 return -ENOMEM;
207         }
208         device->private_free = snd_cs8427_free;
209         
210         snd_i2c_lock(bus);
211         if ((err = snd_cs8427_reg_read(device, CS8427_REG_ID_AND_VER)) != CS8427_VER8427A) {
212                 snd_i2c_unlock(bus);
213                 snd_printk(KERN_ERR "unable to find CS8427 signature (expected 0x%x, read 0x%x), initialization is not completed\n", CS8427_VER8427A, err);
214                 return -EFAULT;
215         }
216         /* turn off run bit while making changes to configuration */
217         if ((err = snd_cs8427_reg_write(device, CS8427_REG_CLOCKSOURCE, 0x00)) < 0)
218                 goto __fail;
219         /* send initial values */
220         memcpy(chip->regmap + (initvals1[0] & 0x7f), initvals1 + 1, 6);
221         if ((err = snd_i2c_sendbytes(device, initvals1, 7)) != 7) {
222                 err = err < 0 ? err : -EIO;
223                 goto __fail;
224         }
225         /* Turn off CS8427 interrupt stuff that is not used in hardware */
226         memset(buf, 0, 7);
227         /* from address 9 to 15 */
228         buf[0] = 9;     /* register */
229         if ((err = snd_i2c_sendbytes(device, buf, 7)) != 7)
230                 goto __fail;
231         /* send transfer initialization sequence */
232         memcpy(chip->regmap + (initvals2[0] & 0x7f), initvals2 + 1, 3);
233         if ((err = snd_i2c_sendbytes(device, initvals2, 4)) != 4) {
234                 err = err < 0 ? err : -EIO;
235                 goto __fail;
236         }
237         /* write default channel status bytes */
238         buf[0] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 0));
239         buf[1] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 8));
240         buf[2] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 16));
241         buf[3] = ((unsigned char)(SNDRV_PCM_DEFAULT_CON_SPDIF >> 24));
242         memset(buf + 4, 0, 24 - 4);
243         if (snd_cs8427_send_corudata(device, 0, buf, 24) < 0)
244                 goto __fail;
245         memcpy(chip->playback.def_status, buf, 24);
246         memcpy(chip->playback.pcm_status, buf, 24);
247         snd_i2c_unlock(bus);
248
249         /* turn on run bit and rock'n'roll */
250         if (reset_timeout < 1)
251                 reset_timeout = 1;
252         chip->reset_timeout = reset_timeout;
253         snd_cs8427_reset(device);
254
255 #if 0   // it's nice for read tests
256         {
257         char buf[128];
258         int xx;
259         buf[0] = 0x81;
260         snd_i2c_sendbytes(device, buf, 1);
261         snd_i2c_readbytes(device, buf, 127);
262         for (xx = 0; xx < 127; xx++)
263                 printk(KERN_DEBUG "reg[0x%x] = 0x%x\n", xx+1, buf[xx]);
264         }
265 #endif
266         
267         if (r_cs8427)
268                 *r_cs8427 = device;
269         return 0;
270
271       __fail:
272         snd_i2c_unlock(bus);
273         snd_i2c_device_free(device);
274         return err < 0 ? err : -EIO;
275 }
276
277 /*
278  * Reset the chip using run bit, also lock PLL using ILRCK and
279  * put back AES3INPUT. This workaround is described in latest
280  * CS8427 datasheet, otherwise TXDSERIAL will not work.
281  */
282 static void snd_cs8427_reset(snd_i2c_device_t *cs8427)
283 {
284         cs8427_t *chip;
285         unsigned long end_time;
286         int data;
287
288         snd_assert(cs8427, return);
289         chip = cs8427->private_data;
290         snd_i2c_lock(cs8427->bus);
291         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~(CS8427_RUN | CS8427_RXDMASK);
292         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, chip->regmap[CS8427_REG_CLOCKSOURCE]);
293         udelay(200);
294         chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RUN | CS8427_RXDILRCK;
295         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, chip->regmap[CS8427_REG_CLOCKSOURCE]);
296         udelay(200);
297         snd_i2c_unlock(cs8427->bus);
298         end_time = jiffies + chip->reset_timeout;
299         while (time_after_eq(end_time, jiffies)) {
300                 snd_i2c_lock(cs8427->bus);
301                 data = snd_cs8427_reg_read(cs8427, CS8427_REG_RECVERRORS);
302                 snd_i2c_unlock(cs8427->bus);
303                 if (!(data & CS8427_UNLOCK))
304                         break;
305                 schedule_timeout_uninterruptible(1);
306         }
307         snd_i2c_lock(cs8427->bus);
308         chip->regmap[CS8427_REG_CLOCKSOURCE] &= ~CS8427_RXDMASK;
309         chip->regmap[CS8427_REG_CLOCKSOURCE] |= CS8427_RXDAES3INPUT;
310         snd_cs8427_reg_write(cs8427, CS8427_REG_CLOCKSOURCE, chip->regmap[CS8427_REG_CLOCKSOURCE]);
311         snd_i2c_unlock(cs8427->bus);
312 }
313
314 static int snd_cs8427_in_status_info(snd_kcontrol_t *kcontrol,
315                                      snd_ctl_elem_info_t *uinfo)
316 {
317         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
318         uinfo->count = 1;
319         uinfo->value.integer.min = 0;
320         uinfo->value.integer.max = 255;
321         return 0;
322 }
323
324 static int snd_cs8427_in_status_get(snd_kcontrol_t *kcontrol,
325                                     snd_ctl_elem_value_t *ucontrol)
326 {
327         snd_i2c_device_t *device = snd_kcontrol_chip(kcontrol);
328         int data;
329
330         snd_i2c_lock(device->bus);
331         data = snd_cs8427_reg_read(device, kcontrol->private_value);
332         snd_i2c_unlock(device->bus);
333         if (data < 0)
334                 return data;
335         ucontrol->value.integer.value[0] = data;
336         return 0;
337 }
338
339 static int snd_cs8427_qsubcode_info(snd_kcontrol_t *kcontrol,
340                                     snd_ctl_elem_info_t *uinfo)
341 {
342         uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
343         uinfo->count = 10;
344         return 0;
345 }
346
347 static int snd_cs8427_qsubcode_get(snd_kcontrol_t *kcontrol,
348                                    snd_ctl_elem_value_t *ucontrol)
349 {
350         snd_i2c_device_t *device = snd_kcontrol_chip(kcontrol);
351         unsigned char reg = CS8427_REG_QSUBCODE;
352         int err;
353
354         snd_i2c_lock(device->bus);
355         if ((err = snd_i2c_sendbytes(device, &reg, 1)) != 1) {
356                 snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg);
357                 snd_i2c_unlock(device->bus);
358                 return err < 0 ? err : -EIO;
359         }
360         if ((err = snd_i2c_readbytes(device, ucontrol->value.bytes.data, 10)) != 10) {
361                 snd_printk(KERN_ERR "unable to read Q-subcode bytes from CS8427\n");
362                 snd_i2c_unlock(device->bus);
363                 return err < 0 ? err : -EIO;
364         }
365         snd_i2c_unlock(device->bus);
366         return 0;
367 }
368
369 static int snd_cs8427_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
370 {
371         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
372         uinfo->count = 1;
373         return 0;
374 }
375
376 static int snd_cs8427_spdif_get(snd_kcontrol_t * kcontrol,
377                                 snd_ctl_elem_value_t * ucontrol)
378 {
379         snd_i2c_device_t *device = snd_kcontrol_chip(kcontrol);
380         cs8427_t *chip = device->private_data;
381         
382         snd_i2c_lock(device->bus);
383         memcpy(ucontrol->value.iec958.status, chip->playback.def_status, 24);
384         snd_i2c_unlock(device->bus);
385         return 0;
386 }
387
388 static int snd_cs8427_spdif_put(snd_kcontrol_t * kcontrol,
389                                 snd_ctl_elem_value_t * ucontrol)
390 {
391         snd_i2c_device_t *device = snd_kcontrol_chip(kcontrol);
392         cs8427_t *chip = device->private_data;
393         unsigned char *status = kcontrol->private_value ? chip->playback.pcm_status : chip->playback.def_status;
394         snd_pcm_runtime_t *runtime = chip->playback.substream ? chip->playback.substream->runtime : NULL;
395         int err, change;
396
397         snd_i2c_lock(device->bus);
398         change = memcmp(ucontrol->value.iec958.status, status, 24) != 0;
399         memcpy(status, ucontrol->value.iec958.status, 24);
400         if (change && (kcontrol->private_value ? runtime != NULL : runtime == NULL)) {
401                 err = snd_cs8427_send_corudata(device, 0, status, 24);
402                 if (err < 0)
403                         change = err;
404         }
405         snd_i2c_unlock(device->bus);
406         return change;
407 }
408
409 static int snd_cs8427_spdif_mask_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
410 {
411         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
412         uinfo->count = 1;
413         return 0;
414 }
415
416 static int snd_cs8427_spdif_mask_get(snd_kcontrol_t * kcontrol,
417                                       snd_ctl_elem_value_t * ucontrol)
418 {
419         memset(ucontrol->value.iec958.status, 0xff, 24);
420         return 0;
421 }
422
423 static snd_kcontrol_new_t snd_cs8427_iec958_controls[] = {
424 {
425         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
426         .info =         snd_cs8427_in_status_info,
427         .name =         "IEC958 CS8427 Input Status",
428         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
429         .get =          snd_cs8427_in_status_get,
430         .private_value = 15,
431 },
432 {
433         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
434         .info =         snd_cs8427_in_status_info,
435         .name =         "IEC958 CS8427 Error Status",
436         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
437         .get =          snd_cs8427_in_status_get,
438         .private_value = 16,
439 },
440 {
441         .access =       SNDRV_CTL_ELEM_ACCESS_READ,
442         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
443         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
444         .info =         snd_cs8427_spdif_mask_info,
445         .get =          snd_cs8427_spdif_mask_get,
446 },
447 {
448         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
449         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
450         .info =         snd_cs8427_spdif_info,
451         .get =          snd_cs8427_spdif_get,
452         .put =          snd_cs8427_spdif_put,
453         .private_value = 0
454 },
455 {
456         .access =       SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
457         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
458         .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
459         .info =         snd_cs8427_spdif_info,
460         .get =          snd_cs8427_spdif_get,
461         .put =          snd_cs8427_spdif_put,
462         .private_value = 1
463 },
464 {
465         .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
466         .info =         snd_cs8427_qsubcode_info,
467         .name =         "IEC958 Q-subcode Capture Default",
468         .access =       SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
469         .get =          snd_cs8427_qsubcode_get
470 }};
471
472 int snd_cs8427_iec958_build(snd_i2c_device_t *cs8427,
473                             snd_pcm_substream_t *play_substream,
474                             snd_pcm_substream_t *cap_substream)
475 {
476         cs8427_t *chip = cs8427->private_data;
477         snd_kcontrol_t *kctl;
478         unsigned int idx;
479         int err;
480
481         snd_assert(play_substream && cap_substream, return -EINVAL);
482         for (idx = 0; idx < ARRAY_SIZE(snd_cs8427_iec958_controls); idx++) {
483                 kctl = snd_ctl_new1(&snd_cs8427_iec958_controls[idx], cs8427);
484                 if (kctl == NULL)
485                         return -ENOMEM;
486                 kctl->id.device = play_substream->pcm->device;
487                 kctl->id.subdevice = play_substream->number;
488                 err = snd_ctl_add(cs8427->bus->card, kctl);
489                 if (err < 0)
490                         return err;
491                 if (!strcmp(kctl->id.name, SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM)))
492                         chip->playback.pcm_ctl = kctl;
493         }
494
495         chip->playback.substream = play_substream;
496         chip->capture.substream = cap_substream;
497         snd_assert(chip->playback.pcm_ctl, return -EIO);
498         return 0;
499 }
500
501 int snd_cs8427_iec958_active(snd_i2c_device_t *cs8427, int active)
502 {
503         cs8427_t *chip;
504
505         snd_assert(cs8427, return -ENXIO);
506         chip = cs8427->private_data;
507         if (active)
508                 memcpy(chip->playback.pcm_status, chip->playback.def_status, 24);
509         chip->playback.pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
510         snd_ctl_notify(cs8427->bus->card, SNDRV_CTL_EVENT_MASK_VALUE |
511                                           SNDRV_CTL_EVENT_MASK_INFO, &chip->playback.pcm_ctl->id);
512         return 0;
513 }
514
515 int snd_cs8427_iec958_pcm(snd_i2c_device_t *cs8427, unsigned int rate)
516 {
517         cs8427_t *chip;
518         char *status;
519         int err, reset;
520
521         snd_assert(cs8427, return -ENXIO);
522         chip = cs8427->private_data;
523         status = chip->playback.pcm_status;
524         snd_i2c_lock(cs8427->bus);
525         if (status[0] & IEC958_AES0_PROFESSIONAL) {
526                 status[0] &= ~IEC958_AES0_PRO_FS;
527                 switch (rate) {
528                 case 32000: status[0] |= IEC958_AES0_PRO_FS_32000; break;
529                 case 44100: status[0] |= IEC958_AES0_PRO_FS_44100; break;
530                 case 48000: status[0] |= IEC958_AES0_PRO_FS_48000; break;
531                 default: status[0] |= IEC958_AES0_PRO_FS_NOTID; break;
532                 }
533         } else {
534                 status[3] &= ~IEC958_AES3_CON_FS;
535                 switch (rate) {
536                 case 32000: status[3] |= IEC958_AES3_CON_FS_32000; break;
537                 case 44100: status[3] |= IEC958_AES3_CON_FS_44100; break;
538                 case 48000: status[3] |= IEC958_AES3_CON_FS_48000; break;
539                 }
540         }
541         err = snd_cs8427_send_corudata(cs8427, 0, status, 24);
542         if (err > 0)
543                 snd_ctl_notify(cs8427->bus->card,
544                                SNDRV_CTL_EVENT_MASK_VALUE,
545                                &chip->playback.pcm_ctl->id);
546         reset = chip->rate != rate;
547         chip->rate = rate;
548         snd_i2c_unlock(cs8427->bus);
549         if (reset)
550                 snd_cs8427_reset(cs8427);
551         return err < 0 ? err : 0;
552 }
553
554 static int __init alsa_cs8427_module_init(void)
555 {
556         return 0;
557 }
558
559 static void __exit alsa_cs8427_module_exit(void)
560 {
561 }
562
563 module_init(alsa_cs8427_module_init)
564 module_exit(alsa_cs8427_module_exit)
565
566 EXPORT_SYMBOL(snd_cs8427_create);
567 EXPORT_SYMBOL(snd_cs8427_reset);
568 EXPORT_SYMBOL(snd_cs8427_reg_write);
569 EXPORT_SYMBOL(snd_cs8427_iec958_build);
570 EXPORT_SYMBOL(snd_cs8427_iec958_active);
571 EXPORT_SYMBOL(snd_cs8427_iec958_pcm);