4 * ASoC Driver for Cirrus Logic CS42L51 codecs
6 * Copyright (c) 2010 Arnaud Patard <apatard@mandriva.com>
8 * Based on cs4270.c - Copyright (c) Freescale Semiconductor
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.
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.
20 * - Only I2C is support. Not SPI
21 * - master mode *NOT* supported
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <sound/core.h>
28 #include <sound/soc.h>
29 #include <sound/tlv.h>
30 #include <sound/initval.h>
31 #include <sound/pcm_params.h>
32 #include <sound/pcm.h>
33 #include <linux/i2c.h>
37 enum master_slave_mode
{
43 struct cs42l51_private
{
44 enum snd_soc_control_type control_type
;
46 unsigned int audio_mode
; /* The mode (I2S or left-justified) */
47 enum master_slave_mode func
;
50 #define CS42L51_FORMATS ( \
51 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
52 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
53 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
54 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
56 static int cs42l51_fill_cache(struct snd_soc_codec
*codec
)
58 u8
*cache
= codec
->reg_cache
+ 1;
59 struct i2c_client
*i2c_client
= to_i2c_client(codec
->dev
);
62 length
= i2c_smbus_read_i2c_block_data(i2c_client
,
63 CS42L51_FIRSTREG
| 0x80, CS42L51_NUMREGS
, cache
);
64 if (length
!= CS42L51_NUMREGS
) {
65 dev_err(&i2c_client
->dev
,
66 "I2C read failure, addr=0x%x (ret=%d vs %d)\n",
67 i2c_client
->addr
, length
, CS42L51_NUMREGS
);
74 static int cs42l51_get_chan_mix(struct snd_kcontrol
*kcontrol
,
75 struct snd_ctl_elem_value
*ucontrol
)
77 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
78 unsigned long value
= snd_soc_read(codec
, CS42L51_PCM_MIXER
)&3;
83 ucontrol
->value
.integer
.value
[0] = 0;
85 /* same value : (L+R)/2 and (R+L)/2 */
88 ucontrol
->value
.integer
.value
[0] = 1;
91 ucontrol
->value
.integer
.value
[0] = 2;
98 #define CHAN_MIX_NORMAL 0x00
99 #define CHAN_MIX_BOTH 0x55
100 #define CHAN_MIX_SWAP 0xFF
102 static int cs42l51_set_chan_mix(struct snd_kcontrol
*kcontrol
,
103 struct snd_ctl_elem_value
*ucontrol
)
105 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
108 switch (ucontrol
->value
.integer
.value
[0]) {
111 val
= CHAN_MIX_NORMAL
;
121 snd_soc_write(codec
, CS42L51_PCM_MIXER
, val
);
126 static const DECLARE_TLV_DB_SCALE(adc_pcm_tlv
, -5150, 50, 0);
127 static const DECLARE_TLV_DB_SCALE(tone_tlv
, -1050, 150, 0);
128 /* This is a lie. after -102 db, it stays at -102 */
129 /* maybe a range would be better */
130 static const DECLARE_TLV_DB_SCALE(aout_tlv
, -11550, 50, 0);
132 static const DECLARE_TLV_DB_SCALE(boost_tlv
, 1600, 1600, 0);
133 static const char *chan_mix
[] = {
139 static const struct soc_enum cs42l51_chan_mix
=
140 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(chan_mix
), chan_mix
);
142 static const struct snd_kcontrol_new cs42l51_snd_controls
[] = {
143 SOC_DOUBLE_R_SX_TLV("PCM Playback Volume",
144 CS42L51_PCMA_VOL
, CS42L51_PCMB_VOL
,
145 7, 0xffffff99, 0x18, adc_pcm_tlv
),
146 SOC_DOUBLE_R("PCM Playback Switch",
147 CS42L51_PCMA_VOL
, CS42L51_PCMB_VOL
, 7, 1, 1),
148 SOC_DOUBLE_R_SX_TLV("Analog Playback Volume",
149 CS42L51_AOUTA_VOL
, CS42L51_AOUTB_VOL
,
150 8, 0xffffff19, 0x18, aout_tlv
),
151 SOC_DOUBLE_R_SX_TLV("ADC Mixer Volume",
152 CS42L51_ADCA_VOL
, CS42L51_ADCB_VOL
,
153 7, 0xffffff99, 0x18, adc_pcm_tlv
),
154 SOC_DOUBLE_R("ADC Mixer Switch",
155 CS42L51_ADCA_VOL
, CS42L51_ADCB_VOL
, 7, 1, 1),
156 SOC_SINGLE("Playback Deemphasis Switch", CS42L51_DAC_CTL
, 3, 1, 0),
157 SOC_SINGLE("Auto-Mute Switch", CS42L51_DAC_CTL
, 2, 1, 0),
158 SOC_SINGLE("Soft Ramp Switch", CS42L51_DAC_CTL
, 1, 1, 0),
159 SOC_SINGLE("Zero Cross Switch", CS42L51_DAC_CTL
, 0, 0, 0),
160 SOC_DOUBLE_TLV("Mic Boost Volume",
161 CS42L51_MIC_CTL
, 0, 1, 1, 0, boost_tlv
),
162 SOC_SINGLE_TLV("Bass Volume", CS42L51_TONE_CTL
, 0, 0xf, 1, tone_tlv
),
163 SOC_SINGLE_TLV("Treble Volume", CS42L51_TONE_CTL
, 4, 0xf, 1, tone_tlv
),
164 SOC_ENUM_EXT("PCM channel mixer",
166 cs42l51_get_chan_mix
, cs42l51_set_chan_mix
),
170 * to power down, one must:
171 * 1.) Enable the PDN bit
172 * 2.) enable power-down for the select channels
173 * 3.) disable the PDN bit.
175 static int cs42l51_pdn_event(struct snd_soc_dapm_widget
*w
,
176 struct snd_kcontrol
*kcontrol
, int event
)
179 case SND_SOC_DAPM_PRE_PMD
:
180 snd_soc_update_bits(w
->codec
, CS42L51_POWER_CTL1
,
181 CS42L51_POWER_CTL1_PDN
,
182 CS42L51_POWER_CTL1_PDN
);
185 case SND_SOC_DAPM_POST_PMD
:
186 snd_soc_update_bits(w
->codec
, CS42L51_POWER_CTL1
,
187 CS42L51_POWER_CTL1_PDN
, 0);
194 static const char *cs42l51_dac_names
[] = {"Direct PCM",
196 static const struct soc_enum cs42l51_dac_mux_enum
=
197 SOC_ENUM_SINGLE(CS42L51_DAC_CTL
, 6, 3, cs42l51_dac_names
);
198 static const struct snd_kcontrol_new cs42l51_dac_mux_controls
=
199 SOC_DAPM_ENUM("Route", cs42l51_dac_mux_enum
);
201 static const char *cs42l51_adcl_names
[] = {"AIN1 Left", "AIN2 Left",
202 "MIC Left", "MIC+preamp Left"};
203 static const struct soc_enum cs42l51_adcl_mux_enum
=
204 SOC_ENUM_SINGLE(CS42L51_ADC_INPUT
, 4, 4, cs42l51_adcl_names
);
205 static const struct snd_kcontrol_new cs42l51_adcl_mux_controls
=
206 SOC_DAPM_ENUM("Route", cs42l51_adcl_mux_enum
);
208 static const char *cs42l51_adcr_names
[] = {"AIN1 Right", "AIN2 Right",
209 "MIC Right", "MIC+preamp Right"};
210 static const struct soc_enum cs42l51_adcr_mux_enum
=
211 SOC_ENUM_SINGLE(CS42L51_ADC_INPUT
, 6, 4, cs42l51_adcr_names
);
212 static const struct snd_kcontrol_new cs42l51_adcr_mux_controls
=
213 SOC_DAPM_ENUM("Route", cs42l51_adcr_mux_enum
);
215 static const struct snd_soc_dapm_widget cs42l51_dapm_widgets
[] = {
216 SND_SOC_DAPM_MICBIAS("Mic Bias", CS42L51_MIC_POWER_CTL
, 1, 1),
217 SND_SOC_DAPM_PGA_E("Left PGA", CS42L51_POWER_CTL1
, 3, 1, NULL
, 0,
218 cs42l51_pdn_event
, SND_SOC_DAPM_PRE_POST_PMD
),
219 SND_SOC_DAPM_PGA_E("Right PGA", CS42L51_POWER_CTL1
, 4, 1, NULL
, 0,
220 cs42l51_pdn_event
, SND_SOC_DAPM_PRE_POST_PMD
),
221 SND_SOC_DAPM_ADC_E("Left ADC", "Left HiFi Capture",
222 CS42L51_POWER_CTL1
, 1, 1,
223 cs42l51_pdn_event
, SND_SOC_DAPM_PRE_POST_PMD
),
224 SND_SOC_DAPM_ADC_E("Right ADC", "Right HiFi Capture",
225 CS42L51_POWER_CTL1
, 2, 1,
226 cs42l51_pdn_event
, SND_SOC_DAPM_PRE_POST_PMD
),
227 SND_SOC_DAPM_DAC_E("Left DAC", "Left HiFi Playback",
228 CS42L51_POWER_CTL1
, 5, 1,
229 cs42l51_pdn_event
, SND_SOC_DAPM_PRE_POST_PMD
),
230 SND_SOC_DAPM_DAC_E("Right DAC", "Right HiFi Playback",
231 CS42L51_POWER_CTL1
, 6, 1,
232 cs42l51_pdn_event
, SND_SOC_DAPM_PRE_POST_PMD
),
235 SND_SOC_DAPM_INPUT("AIN1L"),
236 SND_SOC_DAPM_INPUT("AIN1R"),
237 SND_SOC_DAPM_INPUT("AIN2L"),
238 SND_SOC_DAPM_INPUT("AIN2R"),
239 SND_SOC_DAPM_INPUT("MICL"),
240 SND_SOC_DAPM_INPUT("MICR"),
242 SND_SOC_DAPM_MIXER("Mic Preamp Left",
243 CS42L51_MIC_POWER_CTL
, 2, 1, NULL
, 0),
244 SND_SOC_DAPM_MIXER("Mic Preamp Right",
245 CS42L51_MIC_POWER_CTL
, 3, 1, NULL
, 0),
248 SND_SOC_DAPM_OUTPUT("HPL"),
249 SND_SOC_DAPM_OUTPUT("HPR"),
252 SND_SOC_DAPM_MUX("DAC Mux", SND_SOC_NOPM
, 0, 0,
253 &cs42l51_dac_mux_controls
),
254 SND_SOC_DAPM_MUX("PGA-ADC Mux Left", SND_SOC_NOPM
, 0, 0,
255 &cs42l51_adcl_mux_controls
),
256 SND_SOC_DAPM_MUX("PGA-ADC Mux Right", SND_SOC_NOPM
, 0, 0,
257 &cs42l51_adcr_mux_controls
),
260 static const struct snd_soc_dapm_route cs42l51_routes
[] = {
261 {"HPL", NULL
, "Left DAC"},
262 {"HPR", NULL
, "Right DAC"},
264 {"Left ADC", NULL
, "Left PGA"},
265 {"Right ADC", NULL
, "Right PGA"},
267 {"Mic Preamp Left", NULL
, "MICL"},
268 {"Mic Preamp Right", NULL
, "MICR"},
270 {"PGA-ADC Mux Left", "AIN1 Left", "AIN1L" },
271 {"PGA-ADC Mux Left", "AIN2 Left", "AIN2L" },
272 {"PGA-ADC Mux Left", "MIC Left", "MICL" },
273 {"PGA-ADC Mux Left", "MIC+preamp Left", "Mic Preamp Left" },
274 {"PGA-ADC Mux Right", "AIN1 Right", "AIN1R" },
275 {"PGA-ADC Mux Right", "AIN2 Right", "AIN2R" },
276 {"PGA-ADC Mux Right", "MIC Right", "MICR" },
277 {"PGA-ADC Mux Right", "MIC+preamp Right", "Mic Preamp Right" },
279 {"Left PGA", NULL
, "PGA-ADC Mux Left"},
280 {"Right PGA", NULL
, "PGA-ADC Mux Right"},
283 static int cs42l51_set_dai_fmt(struct snd_soc_dai
*codec_dai
,
286 struct snd_soc_codec
*codec
= codec_dai
->codec
;
287 struct cs42l51_private
*cs42l51
= snd_soc_codec_get_drvdata(codec
);
289 switch (format
& SND_SOC_DAIFMT_FORMAT_MASK
) {
290 case SND_SOC_DAIFMT_I2S
:
291 case SND_SOC_DAIFMT_LEFT_J
:
292 case SND_SOC_DAIFMT_RIGHT_J
:
293 cs42l51
->audio_mode
= format
& SND_SOC_DAIFMT_FORMAT_MASK
;
296 dev_err(codec
->dev
, "invalid DAI format\n");
300 switch (format
& SND_SOC_DAIFMT_MASTER_MASK
) {
301 case SND_SOC_DAIFMT_CBM_CFM
:
302 cs42l51
->func
= MODE_MASTER
;
304 case SND_SOC_DAIFMT_CBS_CFS
:
305 cs42l51
->func
= MODE_SLAVE_AUTO
;
308 dev_err(codec
->dev
, "Unknown master/slave configuration\n");
315 struct cs42l51_ratios
{
317 unsigned char speed_mode
;
321 static struct cs42l51_ratios slave_ratios
[] = {
322 { 512, CS42L51_QSM_MODE
, 0 }, { 768, CS42L51_QSM_MODE
, 0 },
323 { 1024, CS42L51_QSM_MODE
, 0 }, { 1536, CS42L51_QSM_MODE
, 0 },
324 { 2048, CS42L51_QSM_MODE
, 0 }, { 3072, CS42L51_QSM_MODE
, 0 },
325 { 256, CS42L51_HSM_MODE
, 0 }, { 384, CS42L51_HSM_MODE
, 0 },
326 { 512, CS42L51_HSM_MODE
, 0 }, { 768, CS42L51_HSM_MODE
, 0 },
327 { 1024, CS42L51_HSM_MODE
, 0 }, { 1536, CS42L51_HSM_MODE
, 0 },
328 { 128, CS42L51_SSM_MODE
, 0 }, { 192, CS42L51_SSM_MODE
, 0 },
329 { 256, CS42L51_SSM_MODE
, 0 }, { 384, CS42L51_SSM_MODE
, 0 },
330 { 512, CS42L51_SSM_MODE
, 0 }, { 768, CS42L51_SSM_MODE
, 0 },
331 { 128, CS42L51_DSM_MODE
, 0 }, { 192, CS42L51_DSM_MODE
, 0 },
332 { 256, CS42L51_DSM_MODE
, 0 }, { 384, CS42L51_DSM_MODE
, 0 },
335 static struct cs42l51_ratios slave_auto_ratios
[] = {
336 { 1024, CS42L51_QSM_MODE
, 0 }, { 1536, CS42L51_QSM_MODE
, 0 },
337 { 2048, CS42L51_QSM_MODE
, 1 }, { 3072, CS42L51_QSM_MODE
, 1 },
338 { 512, CS42L51_HSM_MODE
, 0 }, { 768, CS42L51_HSM_MODE
, 0 },
339 { 1024, CS42L51_HSM_MODE
, 1 }, { 1536, CS42L51_HSM_MODE
, 1 },
340 { 256, CS42L51_SSM_MODE
, 0 }, { 384, CS42L51_SSM_MODE
, 0 },
341 { 512, CS42L51_SSM_MODE
, 1 }, { 768, CS42L51_SSM_MODE
, 1 },
342 { 128, CS42L51_DSM_MODE
, 0 }, { 192, CS42L51_DSM_MODE
, 0 },
343 { 256, CS42L51_DSM_MODE
, 1 }, { 384, CS42L51_DSM_MODE
, 1 },
346 static int cs42l51_set_dai_sysclk(struct snd_soc_dai
*codec_dai
,
347 int clk_id
, unsigned int freq
, int dir
)
349 struct snd_soc_codec
*codec
= codec_dai
->codec
;
350 struct cs42l51_private
*cs42l51
= snd_soc_codec_get_drvdata(codec
);
352 cs42l51
->mclk
= freq
;
356 static int cs42l51_hw_params(struct snd_pcm_substream
*substream
,
357 struct snd_pcm_hw_params
*params
,
358 struct snd_soc_dai
*dai
)
360 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
361 struct snd_soc_codec
*codec
= rtd
->codec
;
362 struct cs42l51_private
*cs42l51
= snd_soc_codec_get_drvdata(codec
);
367 struct cs42l51_ratios
*ratios
= NULL
;
369 int intf_ctl
, power_ctl
, fmt
;
371 switch (cs42l51
->func
) {
375 ratios
= slave_ratios
;
376 nr_ratios
= ARRAY_SIZE(slave_ratios
);
378 case MODE_SLAVE_AUTO
:
379 ratios
= slave_auto_ratios
;
380 nr_ratios
= ARRAY_SIZE(slave_auto_ratios
);
384 /* Figure out which MCLK/LRCK ratio to use */
385 rate
= params_rate(params
); /* Sampling rate, in Hz */
386 ratio
= cs42l51
->mclk
/ rate
; /* MCLK/LRCK ratio */
387 for (i
= 0; i
< nr_ratios
; i
++) {
388 if (ratios
[i
].ratio
== ratio
)
392 if (i
== nr_ratios
) {
393 /* We did not find a matching ratio */
394 dev_err(codec
->dev
, "could not find matching ratio\n");
398 intf_ctl
= snd_soc_read(codec
, CS42L51_INTF_CTL
);
399 power_ctl
= snd_soc_read(codec
, CS42L51_MIC_POWER_CTL
);
401 intf_ctl
&= ~(CS42L51_INTF_CTL_MASTER
| CS42L51_INTF_CTL_ADC_I2S
402 | CS42L51_INTF_CTL_DAC_FORMAT(7));
403 power_ctl
&= ~(CS42L51_MIC_POWER_CTL_SPEED(3)
404 | CS42L51_MIC_POWER_CTL_MCLK_DIV2
);
406 switch (cs42l51
->func
) {
408 intf_ctl
|= CS42L51_INTF_CTL_MASTER
;
409 power_ctl
|= CS42L51_MIC_POWER_CTL_SPEED(ratios
[i
].speed_mode
);
412 power_ctl
|= CS42L51_MIC_POWER_CTL_SPEED(ratios
[i
].speed_mode
);
414 case MODE_SLAVE_AUTO
:
415 power_ctl
|= CS42L51_MIC_POWER_CTL_AUTO
;
419 switch (cs42l51
->audio_mode
) {
420 case SND_SOC_DAIFMT_I2S
:
421 intf_ctl
|= CS42L51_INTF_CTL_ADC_I2S
;
422 intf_ctl
|= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_I2S
);
424 case SND_SOC_DAIFMT_LEFT_J
:
425 intf_ctl
|= CS42L51_INTF_CTL_DAC_FORMAT(CS42L51_DAC_DIF_LJ24
);
427 case SND_SOC_DAIFMT_RIGHT_J
:
428 switch (params_format(params
)) {
429 case SNDRV_PCM_FORMAT_S16_LE
:
430 case SNDRV_PCM_FORMAT_S16_BE
:
431 fmt
= CS42L51_DAC_DIF_RJ16
;
433 case SNDRV_PCM_FORMAT_S18_3LE
:
434 case SNDRV_PCM_FORMAT_S18_3BE
:
435 fmt
= CS42L51_DAC_DIF_RJ18
;
437 case SNDRV_PCM_FORMAT_S20_3LE
:
438 case SNDRV_PCM_FORMAT_S20_3BE
:
439 fmt
= CS42L51_DAC_DIF_RJ20
;
441 case SNDRV_PCM_FORMAT_S24_LE
:
442 case SNDRV_PCM_FORMAT_S24_BE
:
443 fmt
= CS42L51_DAC_DIF_RJ24
;
446 dev_err(codec
->dev
, "unknown format\n");
449 intf_ctl
|= CS42L51_INTF_CTL_DAC_FORMAT(fmt
);
452 dev_err(codec
->dev
, "unknown format\n");
457 power_ctl
|= CS42L51_MIC_POWER_CTL_MCLK_DIV2
;
459 ret
= snd_soc_write(codec
, CS42L51_INTF_CTL
, intf_ctl
);
463 ret
= snd_soc_write(codec
, CS42L51_MIC_POWER_CTL
, power_ctl
);
470 static int cs42l51_dai_mute(struct snd_soc_dai
*dai
, int mute
)
472 struct snd_soc_codec
*codec
= dai
->codec
;
474 int mask
= CS42L51_DAC_OUT_CTL_DACA_MUTE
|CS42L51_DAC_OUT_CTL_DACB_MUTE
;
476 reg
= snd_soc_read(codec
, CS42L51_DAC_OUT_CTL
);
483 return snd_soc_write(codec
, CS42L51_DAC_OUT_CTL
, reg
);
486 static const struct snd_soc_dai_ops cs42l51_dai_ops
= {
487 .hw_params
= cs42l51_hw_params
,
488 .set_sysclk
= cs42l51_set_dai_sysclk
,
489 .set_fmt
= cs42l51_set_dai_fmt
,
490 .digital_mute
= cs42l51_dai_mute
,
493 static struct snd_soc_dai_driver cs42l51_dai
= {
494 .name
= "cs42l51-hifi",
496 .stream_name
= "Playback",
499 .rates
= SNDRV_PCM_RATE_8000_96000
,
500 .formats
= CS42L51_FORMATS
,
503 .stream_name
= "Capture",
506 .rates
= SNDRV_PCM_RATE_8000_96000
,
507 .formats
= CS42L51_FORMATS
,
509 .ops
= &cs42l51_dai_ops
,
512 static int cs42l51_probe(struct snd_soc_codec
*codec
)
514 struct cs42l51_private
*cs42l51
= snd_soc_codec_get_drvdata(codec
);
515 struct snd_soc_dapm_context
*dapm
= &codec
->dapm
;
518 ret
= cs42l51_fill_cache(codec
);
520 dev_err(codec
->dev
, "failed to fill register cache\n");
524 ret
= snd_soc_codec_set_cache_io(codec
, 8, 8, cs42l51
->control_type
);
526 dev_err(codec
->dev
, "Failed to set cache I/O: %d\n", ret
);
532 * - Use signal processor
534 * - vol changes immediate
537 reg
= CS42L51_DAC_CTL_DATA_SEL(1)
538 | CS42L51_DAC_CTL_AMUTE
| CS42L51_DAC_CTL_DACSZ(0);
539 ret
= snd_soc_write(codec
, CS42L51_DAC_CTL
, reg
);
543 snd_soc_add_controls(codec
, cs42l51_snd_controls
,
544 ARRAY_SIZE(cs42l51_snd_controls
));
545 snd_soc_dapm_new_controls(dapm
, cs42l51_dapm_widgets
,
546 ARRAY_SIZE(cs42l51_dapm_widgets
));
547 snd_soc_dapm_add_routes(dapm
, cs42l51_routes
,
548 ARRAY_SIZE(cs42l51_routes
));
553 static struct snd_soc_codec_driver soc_codec_device_cs42l51
= {
554 .probe
= cs42l51_probe
,
555 .reg_cache_size
= CS42L51_NUMREGS
,
556 .reg_word_size
= sizeof(u8
),
559 static int cs42l51_i2c_probe(struct i2c_client
*i2c_client
,
560 const struct i2c_device_id
*id
)
562 struct cs42l51_private
*cs42l51
;
565 /* Verify that we have a CS42L51 */
566 ret
= i2c_smbus_read_byte_data(i2c_client
, CS42L51_CHIP_REV_ID
);
568 dev_err(&i2c_client
->dev
, "failed to read I2C\n");
572 if ((ret
!= CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID
, CS42L51_CHIP_REV_A
)) &&
573 (ret
!= CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID
, CS42L51_CHIP_REV_B
))) {
574 dev_err(&i2c_client
->dev
, "Invalid chip id\n");
579 dev_info(&i2c_client
->dev
, "found device cs42l51 rev %d\n",
582 cs42l51
= kzalloc(sizeof(struct cs42l51_private
), GFP_KERNEL
);
584 dev_err(&i2c_client
->dev
, "could not allocate codec\n");
588 i2c_set_clientdata(i2c_client
, cs42l51
);
589 cs42l51
->control_type
= SND_SOC_I2C
;
591 ret
= snd_soc_register_codec(&i2c_client
->dev
,
592 &soc_codec_device_cs42l51
, &cs42l51_dai
, 1);
599 static int cs42l51_i2c_remove(struct i2c_client
*client
)
601 struct cs42l51_private
*cs42l51
= i2c_get_clientdata(client
);
603 snd_soc_unregister_codec(&client
->dev
);
608 static const struct i2c_device_id cs42l51_id
[] = {
612 MODULE_DEVICE_TABLE(i2c
, cs42l51_id
);
614 static struct i2c_driver cs42l51_i2c_driver
= {
616 .name
= "cs42l51-codec",
617 .owner
= THIS_MODULE
,
619 .id_table
= cs42l51_id
,
620 .probe
= cs42l51_i2c_probe
,
621 .remove
= cs42l51_i2c_remove
,
624 static int __init
cs42l51_init(void)
628 ret
= i2c_add_driver(&cs42l51_i2c_driver
);
630 printk(KERN_ERR
"%s: can't add i2c driver\n", __func__
);
635 module_init(cs42l51_init
);
637 static void __exit
cs42l51_exit(void)
639 i2c_del_driver(&cs42l51_i2c_driver
);
641 module_exit(cs42l51_exit
);
643 MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
644 MODULE_DESCRIPTION("Cirrus Logic CS42L51 ALSA SoC Codec Driver");
645 MODULE_LICENSE("GPL");