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ASoC: Convert cs42l51 to table based DAPM and control init
[linux-2.6.git] / sound / soc / codecs / cs42l51.c
blobffce9f2a6643cf4770fd3e113441d9901a066ee5
1 /*
2 * cs42l51.c
3 *
4 * ASoC Driver for Cirrus Logic CS42L51 codecs
5 *
6 * Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
7 *
8 * Based on cs4270.c - Copyright (c) Freescale Semiconductor
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * For now:
20 * - Only I2C is support. Not SPI
21 * - master mode *NOT* supported
22 */
23
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <sound/core.h>
27 #include <sound/soc.h>
28 #include <sound/tlv.h>
29 #include <sound/initval.h>
30 #include <sound/pcm_params.h>
31 #include <sound/pcm.h>
32 #include <linux/i2c.h>
33
34 #include "cs42l51.h"
35
36 enum master_slave_mode {
37 MODE_SLAVE,
38 MODE_SLAVE_AUTO,
39 MODE_MASTER,
40 };
41
42 struct cs42l51_private {
43 enum snd_soc_control_type control_type;
44 unsigned int mclk;
45 unsigned int audio_mode; /* The mode (I2S or left-justified) */
46 enum master_slave_mode func;
47 };
48
49 #define CS42L51_FORMATS ( \
50 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
51 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
52 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
53 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
54
55 static int cs42l51_fill_cache(struct snd_soc_codec *codec)
56 {
57 u8 *cache = codec->reg_cache + 1;
58 struct i2c_client *i2c_client = to_i2c_client(codec->dev);
59 s32 length;
60
61 length = i2c_smbus_read_i2c_block_data(i2c_client,
62 CS42L51_FIRSTREG | 0x80, CS42L51_NUMREGS, cache);
63 if (length != CS42L51_NUMREGS) {
64 dev_err(&i2c_client->dev,
65 "I2C read failure, addr=0x%x (ret=%d vs %d)\n",
66 i2c_client->addr, length, CS42L51_NUMREGS);
67 return -EIO;
68 }
69
70 return 0;
71 }
72
73 static int cs42l51_get_chan_mix(struct snd_kcontrol *kcontrol,
74 struct snd_ctl_elem_value *ucontrol)
75 {
76 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
77 unsigned long value = snd_soc_read(codec, CS42L51_PCM_MIXER)&3;
78
79 switch (value) {
80 default:
81 case 0:
82 ucontrol->value.integer.value[0] = 0;
83 break;
84 /* same value : (L+R)/2 and (R+L)/2 */
85 case 1:
86 case 2:
87 ucontrol->value.integer.value[0] = 1;
88 break;
89 case 3:
90 ucontrol->value.integer.value[0] = 2;
91 break;
92 }
93
94 return 0;
95 }
96
97 #define CHAN_MIX_NORMAL 0x00
98 #define CHAN_MIX_BOTH 0x55
99 #define CHAN_MIX_SWAP 0xFF
100
101 static int cs42l51_set_chan_mix(struct snd_kcontrol *kcontrol,
102 struct snd_ctl_elem_value *ucontrol)
103 {
104 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
105 unsigned char val;
106
107 switch (ucontrol->value.integer.value[0]) {
108 default:
109 case 0:
110 val = CHAN_MIX_NORMAL;
111 break;
112 case 1:
113 val = CHAN_MIX_BOTH;
114 break;
115 case 2:
116 val = CHAN_MIX_SWAP;
117 break;
118 }
119
120 snd_soc_write(codec, CS42L51_PCM_MIXER, val);
121
122 return 1;
123 }
124
125 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv, -5150, 50, 0);
126 static const DECLARE_TLV_DB_SCALE(tone_tlv, -1050, 150, 0);
127 /* This is a lie. after -102 db, it stays at -102 */
128 /* maybe a range would be better */
129 static const DECLARE_TLV_DB_SCALE(aout_tlv, -11550, 50, 0);
130
131 static const DECLARE_TLV_DB_SCALE(boost_tlv, 1600, 1600, 0);
132 static const char *chan_mix[] = {
133 "L R",
134 "L+R",
135 "R L",
136 };
137
138 static const struct soc_enum cs42l51_chan_mix =
139 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix), chan_mix);
140
141 static const struct snd_kcontrol_new cs42l51_snd_controls[] = {
142 SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
143 CS42L51_PCMA_VOL, CS42L51_PCMB_VOL,
144 7, 0xffffff99, 0x18, adc_pcm_tlv),
145 SOC_DOUBLE_R("PCM Playback Switch",
146 CS42L51_PCMA_VOL, CS42L51_PCMB_VOL, 7, 1, 1),
147 SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
148 CS42L51_AOUTA_VOL, CS42L51_AOUTB_VOL,
149 8, 0xffffff19, 0x18, aout_tlv),
150 SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
151 CS42L51_ADCA_VOL, CS42L51_ADCB_VOL,
152 7, 0xffffff99, 0x18, adc_pcm_tlv),
153 SOC_DOUBLE_R("ADC Mixer Switch",
154 CS42L51_ADCA_VOL, CS42L51_ADCB_VOL, 7, 1, 1),
155 SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL, 3, 1, 0),
156 SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL, 2, 1, 0),
157 SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL, 1, 1, 0),
158 SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL, 0, 0, 0),
159 SOC_DOUBLE_TLV("Mic Boost Volume",
160 CS42L51_MIC_CTL, 0, 1, 1, 0, boost_tlv),
161 SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL, 0, 0xf, 1, tone_tlv),
162 SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL, 4, 0xf, 1, tone_tlv),
163 SOC_ENUM_EXT("PCM channel mixer",
164 cs42l51_chan_mix,
165 cs42l51_get_chan_mix, cs42l51_set_chan_mix),
166 };
167
168 /*
169 * to power down, one must:
170 * 1.) Enable the PDN bit
171 * 2.) enable power-down for the select channels
172 * 3.) disable the PDN bit.
173 */
174 static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w,
175 struct snd_kcontrol *kcontrol, int event)
176 {
177 switch (event) {
178 case SND_SOC_DAPM_PRE_PMD:
179 snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
180 CS42L51_POWER_CTL1_PDN,
181 CS42L51_POWER_CTL1_PDN);
182 break;
183 default:
184 case SND_SOC_DAPM_POST_PMD:
185 snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1,
186 CS42L51_POWER_CTL1_PDN, 0);
187 break;
188 }
189
190 return 0;
191 }
192
193 static const char *cs42l51_dac_names[] = {"Direct PCM",
194 "DSP PCM", "ADC"};
195 static const struct soc_enum cs42l51_dac_mux_enum =
196 SOC_ENUM_SINGLE(CS42L51_DAC_CTL, 6, 3, cs42l51_dac_names);
197 static const struct snd_kcontrol_new cs42l51_dac_mux_controls =
198 SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum);
199
200 static const char *cs42l51_adcl_names[] = {"AIN1 Left", "AIN2 Left",
201 "MIC Left", "MIC+preamp Left"};
202 static const struct soc_enum cs42l51_adcl_mux_enum =
203 SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 4, 4, cs42l51_adcl_names);
204 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls =
205 SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum);
206
207 static const char *cs42l51_adcr_names[] = {"AIN1 Right", "AIN2 Right",
208 "MIC Right", "MIC+preamp Right"};
209 static const struct soc_enum cs42l51_adcr_mux_enum =
210 SOC_ENUM_SINGLE(CS42L51_ADC_INPUT, 6, 4, cs42l51_adcr_names);
211 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls =
212 SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum);
213
214 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets[] = {
215 SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL, 1, 1),
216 SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1, 3, 1, NULL, 0,
217 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
218 SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1, 4, 1, NULL, 0,
219 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
220 SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
221 CS42L51_POWER_CTL1, 1, 1,
222 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
223 SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
224 CS42L51_POWER_CTL1, 2, 1,
225 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
226 SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
227 CS42L51_POWER_CTL1, 5, 1,
228 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
229 SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
230 CS42L51_POWER_CTL1, 6, 1,
231 cs42l51_pdn_event, SND_SOC_DAPM_PRE_POST_PMD),
232
233 /* analog/mic */
234 SND_SOC_DAPM_INPUT("AIN1L"),
235 SND_SOC_DAPM_INPUT("AIN1R"),
236 SND_SOC_DAPM_INPUT("AIN2L"),
237 SND_SOC_DAPM_INPUT("AIN2R"),
238 SND_SOC_DAPM_INPUT("MICL"),
239 SND_SOC_DAPM_INPUT("MICR"),
240
241 SND_SOC_DAPM_MIXER("Mic Preamp Left",
242 CS42L51_MIC_POWER_CTL, 2, 1, NULL, 0),
243 SND_SOC_DAPM_MIXER("Mic Preamp Right",
244 CS42L51_MIC_POWER_CTL, 3, 1, NULL, 0),
245
246 /* HP */
247 SND_SOC_DAPM_OUTPUT("HPL"),
248 SND_SOC_DAPM_OUTPUT("HPR"),
249
250 /* mux */
251 SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM, 0, 0,
252 &cs42l51_dac_mux_controls),
253 SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM, 0, 0,
254 &cs42l51_adcl_mux_controls),
255 SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM, 0, 0,
256 &cs42l51_adcr_mux_controls),
257 };
258
259 static const struct snd_soc_dapm_route cs42l51_routes[] = {
260 {"HPL", NULL, "Left DAC"},
261 {"HPR", NULL, "Right DAC"},
262
263 {"Left ADC", NULL, "Left PGA"},
264 {"Right ADC", NULL, "Right PGA"},
265
266 {"Mic Preamp Left", NULL, "MICL"},
267 {"Mic Preamp Right", NULL, "MICR"},
268
269 {"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
270 {"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
271 {"PGA-ADC Mux Left", "MIC Left", "MICL" },
272 {"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
273 {"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
274 {"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
275 {"PGA-ADC Mux Right", "MIC Right", "MICR" },
276 {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
277
278 {"Left PGA", NULL, "PGA-ADC Mux Left"},
279 {"Right PGA", NULL, "PGA-ADC Mux Right"},
280 };
281
282 static int cs42l51_set_dai_fmt(struct snd_soc_dai *codec_dai,
283 unsigned int format)
284 {
285 struct snd_soc_codec *codec = codec_dai->codec;
286 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
287
288 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
289 case SND_SOC_DAIFMT_I2S:
290 case SND_SOC_DAIFMT_LEFT_J:
291 case SND_SOC_DAIFMT_RIGHT_J:
292 cs42l51->audio_mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
293 break;
294 default:
295 dev_err(codec->dev, "invalid DAI format\n");
296 return -EINVAL;
297 }
298
299 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
300 case SND_SOC_DAIFMT_CBM_CFM:
301 cs42l51->func = MODE_MASTER;
302 break;
303 case SND_SOC_DAIFMT_CBS_CFS:
304 cs42l51->func = MODE_SLAVE_AUTO;
305 break;
306 default:
307 dev_err(codec->dev, "Unknown master/slave configuration\n");
308 return -EINVAL;
309 }
310
311 return 0;
312 }
313
314 struct cs42l51_ratios {
315 unsigned int ratio;
316 unsigned char speed_mode;
317 unsigned char mclk;
318 };
319
320 static struct cs42l51_ratios slave_ratios[] = {
321 { 512, CS42L51_QSM_MODE, 0 }, { 768, CS42L51_QSM_MODE, 0 },
322 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
323 { 2048, CS42L51_QSM_MODE, 0 }, { 3072, CS42L51_QSM_MODE, 0 },
324 { 256, CS42L51_HSM_MODE, 0 }, { 384, CS42L51_HSM_MODE, 0 },
325 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
326 { 1024, CS42L51_HSM_MODE, 0 }, { 1536, CS42L51_HSM_MODE, 0 },
327 { 128, CS42L51_SSM_MODE, 0 }, { 192, CS42L51_SSM_MODE, 0 },
328 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
329 { 512, CS42L51_SSM_MODE, 0 }, { 768, CS42L51_SSM_MODE, 0 },
330 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
331 { 256, CS42L51_DSM_MODE, 0 }, { 384, CS42L51_DSM_MODE, 0 },
332 };
333
334 static struct cs42l51_ratios slave_auto_ratios[] = {
335 { 1024, CS42L51_QSM_MODE, 0 }, { 1536, CS42L51_QSM_MODE, 0 },
336 { 2048, CS42L51_QSM_MODE, 1 }, { 3072, CS42L51_QSM_MODE, 1 },
337 { 512, CS42L51_HSM_MODE, 0 }, { 768, CS42L51_HSM_MODE, 0 },
338 { 1024, CS42L51_HSM_MODE, 1 }, { 1536, CS42L51_HSM_MODE, 1 },
339 { 256, CS42L51_SSM_MODE, 0 }, { 384, CS42L51_SSM_MODE, 0 },
340 { 512, CS42L51_SSM_MODE, 1 }, { 768, CS42L51_SSM_MODE, 1 },
341 { 128, CS42L51_DSM_MODE, 0 }, { 192, CS42L51_DSM_MODE, 0 },
342 { 256, CS42L51_DSM_MODE, 1 }, { 384, CS42L51_DSM_MODE, 1 },
343 };
344
345 static int cs42l51_set_dai_sysclk(struct snd_soc_dai *codec_dai,
346 int clk_id, unsigned int freq, int dir)
347 {
348 struct snd_soc_codec *codec = codec_dai->codec;
349 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
350
351 cs42l51->mclk = freq;
352 return 0;
353 }
354
355 static int cs42l51_hw_params(struct snd_pcm_substream *substream,
356 struct snd_pcm_hw_params *params,
357 struct snd_soc_dai *dai)
358 {
359 struct snd_soc_pcm_runtime *rtd = substream->private_data;
360 struct snd_soc_codec *codec = rtd->codec;
361 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
362 int ret;
363 unsigned int i;
364 unsigned int rate;
365 unsigned int ratio;
366 struct cs42l51_ratios *ratios = NULL;
367 int nr_ratios = 0;
368 int intf_ctl, power_ctl, fmt;
369
370 switch (cs42l51->func) {
371 case MODE_MASTER:
372 return -EINVAL;
373 case MODE_SLAVE:
374 ratios = slave_ratios;
375 nr_ratios = ARRAY_SIZE(slave_ratios);
376 break;
377 case MODE_SLAVE_AUTO:
378 ratios = slave_auto_ratios;
379 nr_ratios = ARRAY_SIZE(slave_auto_ratios);
380 break;
381 }
382
383 /* Figure out which MCLK/LRCK ratio to use */
384 rate = params_rate(params); /* Sampling rate, in Hz */
385 ratio = cs42l51->mclk / rate; /* MCLK/LRCK ratio */
386 for (i = 0; i < nr_ratios; i++) {
387 if (ratios[i].ratio == ratio)
388 break;
389 }
390
391 if (i == nr_ratios) {
392 /* We did not find a matching ratio */
393 dev_err(codec->dev, "could not find matching ratio\n");
394 return -EINVAL;
395 }
396
397 intf_ctl = snd_soc_read(codec, CS42L51_INTF_CTL);
398 power_ctl = snd_soc_read(codec, CS42L51_MIC_POWER_CTL);
399
400 intf_ctl &= ~(CS42L51_INTF_CTL_MASTER | CS42L51_INTF_CTL_ADC_I2S
401 | CS42L51_INTF_CTL_DAC_FORMAT(7));
402 power_ctl &= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
403 | CS42L51_MIC_POWER_CTL_MCLK_DIV2);
404
405 switch (cs42l51->func) {
406 case MODE_MASTER:
407 intf_ctl |= CS42L51_INTF_CTL_MASTER;
408 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
409 break;
410 case MODE_SLAVE:
411 power_ctl |= CS42L51_MIC_POWER_CTL_SPEED(ratios[i].speed_mode);
412 break;
413 case MODE_SLAVE_AUTO:
414 power_ctl |= CS42L51_MIC_POWER_CTL_AUTO;
415 break;
416 }
417
418 switch (cs42l51->audio_mode) {
419 case SND_SOC_DAIFMT_I2S:
420 intf_ctl |= CS42L51_INTF_CTL_ADC_I2S;
421 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S);
422 break;
423 case SND_SOC_DAIFMT_LEFT_J:
424 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24);
425 break;
426 case SND_SOC_DAIFMT_RIGHT_J:
427 switch (params_format(params)) {
428 case SNDRV_PCM_FORMAT_S16_LE:
429 case SNDRV_PCM_FORMAT_S16_BE:
430 fmt = CS42L51_DAC_DIF_RJ16;
431 break;
432 case SNDRV_PCM_FORMAT_S18_3LE:
433 case SNDRV_PCM_FORMAT_S18_3BE:
434 fmt = CS42L51_DAC_DIF_RJ18;
435 break;
436 case SNDRV_PCM_FORMAT_S20_3LE:
437 case SNDRV_PCM_FORMAT_S20_3BE:
438 fmt = CS42L51_DAC_DIF_RJ20;
439 break;
440 case SNDRV_PCM_FORMAT_S24_LE:
441 case SNDRV_PCM_FORMAT_S24_BE:
442 fmt = CS42L51_DAC_DIF_RJ24;
443 break;
444 default:
445 dev_err(codec->dev, "unknown format\n");
446 return -EINVAL;
447 }
448 intf_ctl |= CS42L51_INTF_CTL_DAC_FORMAT(fmt);
449 break;
450 default:
451 dev_err(codec->dev, "unknown format\n");
452 return -EINVAL;
453 }
454
455 if (ratios[i].mclk)
456 power_ctl |= CS42L51_MIC_POWER_CTL_MCLK_DIV2;
457
458 ret = snd_soc_write(codec, CS42L51_INTF_CTL, intf_ctl);
459 if (ret < 0)
460 return ret;
461
462 ret = snd_soc_write(codec, CS42L51_MIC_POWER_CTL, power_ctl);
463 if (ret < 0)
464 return ret;
465
466 return 0;
467 }
468
469 static int cs42l51_dai_mute(struct snd_soc_dai *dai, int mute)
470 {
471 struct snd_soc_codec *codec = dai->codec;
472 int reg;
473 int mask = CS42L51_DAC_OUT_CTL_DACA_MUTE|CS42L51_DAC_OUT_CTL_DACB_MUTE;
474
475 reg = snd_soc_read(codec, CS42L51_DAC_OUT_CTL);
476
477 if (mute)
478 reg |= mask;
479 else
480 reg &= ~mask;
481
482 return snd_soc_write(codec, CS42L51_DAC_OUT_CTL, reg);
483 }
484
485 static const struct snd_soc_dai_ops cs42l51_dai_ops = {
486 .hw_params = cs42l51_hw_params,
487 .set_sysclk = cs42l51_set_dai_sysclk,
488 .set_fmt = cs42l51_set_dai_fmt,
489 .digital_mute = cs42l51_dai_mute,
490 };
491
492 static struct snd_soc_dai_driver cs42l51_dai = {
493 .name = "cs42l51-hifi",
494 .playback = {
495 .stream_name = "Playback",
496 .channels_min = 1,
497 .channels_max = 2,
498 .rates = SNDRV_PCM_RATE_8000_96000,
499 .formats = CS42L51_FORMATS,
500 },
501 .capture = {
502 .stream_name = "Capture",
503 .channels_min = 1,
504 .channels_max = 2,
505 .rates = SNDRV_PCM_RATE_8000_96000,
506 .formats = CS42L51_FORMATS,
507 },
508 .ops = &cs42l51_dai_ops,
509 };
510
511 static int cs42l51_probe(struct snd_soc_codec *codec)
512 {
513 struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
514 int ret, reg;
515
516 ret = cs42l51_fill_cache(codec);
517 if (ret < 0) {
518 dev_err(codec->dev, "failed to fill register cache\n");
519 return ret;
520 }
521
522 ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs42l51->control_type);
523 if (ret < 0) {
524 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
525 return ret;
526 }
527
528 /*
529 * DAC configuration
530 * - Use signal processor
531 * - auto mute
532 * - vol changes immediate
533 * - no de-emphasize
534 */
535 reg = CS42L51_DAC_CTL_DATA_SEL(1)
536 | CS42L51_DAC_CTL_AMUTE | CS42L51_DAC_CTL_DACSZ(0);
537 ret = snd_soc_write(codec, CS42L51_DAC_CTL, reg);
538 if (ret < 0)
539 return ret;
540
541 return 0;
542 }
543
544 static struct snd_soc_codec_driver soc_codec_device_cs42l51 = {
545 .probe = cs42l51_probe,
546 .reg_cache_size = CS42L51_NUMREGS + 1,
547 .reg_word_size = sizeof(u8),
548
549 .controls = cs42l51_snd_controls,
550 .num_controls = ARRAY_SIZE(cs42l51_snd_controls),
551 .dapm_widgets = cs42l51_dapm_widgets,
552 .num_dapm_widgets = ARRAY_SIZE(cs42l51_dapm_widgets),
553 .dapm_routes = cs42l51_routes,
554 .num_dapm_routes = ARRAY_SIZE(cs42l51_routes),
555 };
556
557 static int cs42l51_i2c_probe(struct i2c_client *i2c_client,
558 const struct i2c_device_id *id)
559 {
560 struct cs42l51_private *cs42l51;
561 int ret;
562
563 /* Verify that we have a CS42L51 */
564 ret = i2c_smbus_read_byte_data(i2c_client, CS42L51_CHIP_REV_ID);
565 if (ret < 0) {
566 dev_err(&i2c_client->dev, "failed to read I2C\n");
567 goto error;
568 }
569
570 if ((ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_A)) &&
571 (ret != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B))) {
572 dev_err(&i2c_client->dev, "Invalid chip id\n");
573 ret = -ENODEV;
574 goto error;
575 }
576
577 dev_info(&i2c_client->dev, "found device cs42l51 rev %d\n",
578 ret & 7);
579
580 cs42l51 = kzalloc(sizeof(struct cs42l51_private), GFP_KERNEL);
581 if (!cs42l51) {
582 dev_err(&i2c_client->dev, "could not allocate codec\n");
583 return -ENOMEM;
584 }
585
586 i2c_set_clientdata(i2c_client, cs42l51);
587 cs42l51->control_type = SND_SOC_I2C;
588
589 ret = snd_soc_register_codec(&i2c_client->dev,
590 &soc_codec_device_cs42l51, &cs42l51_dai, 1);
591 if (ret < 0)
592 kfree(cs42l51);
593 error:
594 return ret;
595 }
596
597 static int cs42l51_i2c_remove(struct i2c_client *client)
598 {
599 struct cs42l51_private *cs42l51 = i2c_get_clientdata(client);
600
601 snd_soc_unregister_codec(&client->dev);
602 kfree(cs42l51);
603 return 0;
604 }
605
606 static const struct i2c_device_id cs42l51_id[] = {
607 {"cs42l51", 0},
608 {}
609 };
610 MODULE_DEVICE_TABLE(i2c, cs42l51_id);
611
612 static struct i2c_driver cs42l51_i2c_driver = {
613 .driver = {
614 .name = "cs42l51-codec",
615 .owner = THIS_MODULE,
616 },
617 .id_table = cs42l51_id,
618 .probe = cs42l51_i2c_probe,
619 .remove = cs42l51_i2c_remove,
620 };
621
622 static int __init cs42l51_init(void)
623 {
624 int ret;
625
626 ret = i2c_add_driver(&cs42l51_i2c_driver);
627 if (ret != 0) {
628 printk(KERN_ERR "%s: can't add i2c driver\n", __func__);
629 return ret;
630 }
631 return 0;
632 }
633 module_init(cs42l51_init);
634
635 static void __exit cs42l51_exit(void)
636 {
637 i2c_del_driver(&cs42l51_i2c_driver);
638 }
639 module_exit(cs42l51_exit);
640
641 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
642 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
643 MODULE_LICENSE("GPL");
Linus' kernel tree