2 * File: sound/soc/codecs/ssm2602.c
3 * Author: Cliff Cai <Cliff.Cai@analog.com>
5 * Created: Tue June 06 2008
6 * Description: Driver for ssm2602 sound chip
9 * Copyright 2008 Analog Devices Inc.
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/init.h>
32 #include <linux/delay.h>
34 #include <linux/i2c.h>
35 #include <linux/platform_device.h>
36 #include <sound/core.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include <sound/soc.h>
40 #include <sound/soc-dapm.h>
41 #include <sound/initval.h>
45 #define AUDIO_NAME "ssm2602"
46 #define SSM2602_VERSION "0.1"
48 struct snd_soc_codec_device soc_codec_dev_ssm2602;
50 /* codec private data */
53 struct snd_pcm_substream *master_substream;
54 struct snd_pcm_substream *slave_substream;
58 * ssm2602 register cache
59 * We can't read the ssm2602 register space when we are
60 * using 2 wire for device control, so we cache them instead.
61 * There is no point in caching the reset register
63 static const u16 ssm2602_reg[SSM2602_CACHEREGNUM] = {
64 0x0017, 0x0017, 0x0079, 0x0079,
65 0x0000, 0x0000, 0x0000, 0x000a,
70 * read ssm2602 register cache
72 static inline unsigned int ssm2602_read_reg_cache(struct snd_soc_codec *codec,
75 u16 *cache = codec->reg_cache;
76 if (reg == SSM2602_RESET)
78 if (reg >= SSM2602_CACHEREGNUM)
84 * write ssm2602 register cache
86 static inline void ssm2602_write_reg_cache(struct snd_soc_codec *codec,
87 u16 reg, unsigned int value)
89 u16 *cache = codec->reg_cache;
90 if (reg >= SSM2602_CACHEREGNUM)
96 * write to the ssm2602 register space
98 static int ssm2602_write(struct snd_soc_codec *codec, unsigned int reg,
104 * D15..D9 ssm2602 register offset
105 * D8...D0 register data
107 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
108 data[1] = value & 0x00ff;
110 ssm2602_write_reg_cache(codec, reg, value);
111 if (codec->hw_write(codec->control_data, data, 2) == 2)
117 #define ssm2602_reset(c) ssm2602_write(c, SSM2602_RESET, 0)
119 /*Appending several "None"s just for OSS mixer use*/
120 static const char *ssm2602_input_select[] = {
121 "Line", "Mic", "None", "None", "None",
122 "None", "None", "None",
125 static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
127 static const struct soc_enum ssm2602_enum[] = {
128 SOC_ENUM_SINGLE(SSM2602_APANA, 2, 2, ssm2602_input_select),
129 SOC_ENUM_SINGLE(SSM2602_APDIGI, 1, 4, ssm2602_deemph),
132 static const struct snd_kcontrol_new ssm2602_snd_controls[] = {
134 SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
136 SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
139 SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
140 SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),
142 SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
143 SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
145 SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
147 SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
148 SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
150 SOC_ENUM("Capture Source", ssm2602_enum[0]),
152 SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
155 /* add non dapm controls */
156 static int ssm2602_add_controls(struct snd_soc_codec *codec)
160 for (i = 0; i < ARRAY_SIZE(ssm2602_snd_controls); i++) {
161 err = snd_ctl_add(codec->card,
162 snd_soc_cnew(&ssm2602_snd_controls[i], codec, NULL));
171 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
172 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
173 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
174 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
178 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
179 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
181 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
182 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
183 &ssm2602_output_mixer_controls[0],
184 ARRAY_SIZE(ssm2602_output_mixer_controls)),
185 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
186 SND_SOC_DAPM_OUTPUT("LOUT"),
187 SND_SOC_DAPM_OUTPUT("LHPOUT"),
188 SND_SOC_DAPM_OUTPUT("ROUT"),
189 SND_SOC_DAPM_OUTPUT("RHPOUT"),
190 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
191 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
192 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
193 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
194 SND_SOC_DAPM_INPUT("MICIN"),
195 SND_SOC_DAPM_INPUT("RLINEIN"),
196 SND_SOC_DAPM_INPUT("LLINEIN"),
199 static const struct snd_soc_dapm_route audio_conn[] = {
201 {"Output Mixer", "Line Bypass Switch", "Line Input"},
202 {"Output Mixer", "HiFi Playback Switch", "DAC"},
203 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
206 {"RHPOUT", NULL, "Output Mixer"},
207 {"ROUT", NULL, "Output Mixer"},
208 {"LHPOUT", NULL, "Output Mixer"},
209 {"LOUT", NULL, "Output Mixer"},
212 {"Input Mux", "Line", "Line Input"},
213 {"Input Mux", "Mic", "Mic Bias"},
214 {"ADC", NULL, "Input Mux"},
217 {"Line Input", NULL, "LLINEIN"},
218 {"Line Input", NULL, "RLINEIN"},
219 {"Mic Bias", NULL, "MICIN"},
222 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
224 snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
225 ARRAY_SIZE(ssm2602_dapm_widgets));
227 snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
229 snd_soc_dapm_new_widgets(codec);
242 /* codec mclk clock divider coefficients */
243 static const struct _coeff_div coeff_div[] = {
245 {12288000, 48000, 256, 0x0, 0x0, 0x0},
246 {18432000, 48000, 384, 0x0, 0x1, 0x0},
247 {12000000, 48000, 250, 0x0, 0x0, 0x1},
250 {12288000, 32000, 384, 0x6, 0x0, 0x0},
251 {18432000, 32000, 576, 0x6, 0x1, 0x0},
252 {12000000, 32000, 375, 0x6, 0x0, 0x1},
255 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
256 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
257 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
258 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
259 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
262 {12288000, 96000, 128, 0x7, 0x0, 0x0},
263 {18432000, 96000, 192, 0x7, 0x1, 0x0},
264 {12000000, 96000, 125, 0x7, 0x0, 0x1},
267 {11289600, 44100, 256, 0x8, 0x0, 0x0},
268 {16934400, 44100, 384, 0x8, 0x1, 0x0},
269 {12000000, 44100, 272, 0x8, 0x1, 0x1},
272 {11289600, 88200, 128, 0xf, 0x0, 0x0},
273 {16934400, 88200, 192, 0xf, 0x1, 0x0},
274 {12000000, 88200, 136, 0xf, 0x1, 0x1},
277 static inline int get_coeff(int mclk, int rate)
281 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
282 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
288 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
289 struct snd_pcm_hw_params *params)
292 struct snd_soc_pcm_runtime *rtd = substream->private_data;
293 struct snd_soc_device *socdev = rtd->socdev;
294 struct snd_soc_codec *codec = socdev->codec;
295 struct ssm2602_priv *ssm2602 = codec->private_data;
296 u16 iface = ssm2602_read_reg_cache(codec, SSM2602_IFACE) & 0xfff3;
297 int i = get_coeff(ssm2602->sysclk, params_rate(params));
299 /*no match is found*/
300 if (i == ARRAY_SIZE(coeff_div))
303 srate = (coeff_div[i].sr << 2) |
304 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
306 ssm2602_write(codec, SSM2602_ACTIVE, 0);
307 ssm2602_write(codec, SSM2602_SRATE, srate);
310 switch (params_format(params)) {
311 case SNDRV_PCM_FORMAT_S16_LE:
313 case SNDRV_PCM_FORMAT_S20_3LE:
316 case SNDRV_PCM_FORMAT_S24_LE:
319 case SNDRV_PCM_FORMAT_S32_LE:
323 ssm2602_write(codec, SSM2602_IFACE, iface);
324 ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
328 static int ssm2602_startup(struct snd_pcm_substream *substream)
330 struct snd_soc_pcm_runtime *rtd = substream->private_data;
331 struct snd_soc_device *socdev = rtd->socdev;
332 struct snd_soc_codec *codec = socdev->codec;
333 struct ssm2602_priv *ssm2602 = codec->private_data;
334 struct snd_pcm_runtime *master_runtime;
336 /* The DAI has shared clocks so if we already have a playback or
337 * capture going then constrain this substream to match it.
339 if (ssm2602->master_substream) {
340 master_runtime = ssm2602->master_substream->runtime;
341 snd_pcm_hw_constraint_minmax(substream->runtime,
342 SNDRV_PCM_HW_PARAM_RATE,
343 master_runtime->rate,
344 master_runtime->rate);
346 snd_pcm_hw_constraint_minmax(substream->runtime,
347 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
348 master_runtime->sample_bits,
349 master_runtime->sample_bits);
351 ssm2602->slave_substream = substream;
353 ssm2602->master_substream = substream;
358 static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream)
360 struct snd_soc_pcm_runtime *rtd = substream->private_data;
361 struct snd_soc_device *socdev = rtd->socdev;
362 struct snd_soc_codec *codec = socdev->codec;
364 ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
369 static void ssm2602_shutdown(struct snd_pcm_substream *substream)
371 struct snd_soc_pcm_runtime *rtd = substream->private_data;
372 struct snd_soc_device *socdev = rtd->socdev;
373 struct snd_soc_codec *codec = socdev->codec;
376 ssm2602_write(codec, SSM2602_ACTIVE, 0);
379 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
381 struct snd_soc_codec *codec = dai->codec;
382 u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
384 ssm2602_write(codec, SSM2602_APDIGI,
385 mute_reg | APDIGI_ENABLE_DAC_MUTE);
387 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
391 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
392 int clk_id, unsigned int freq, int dir)
394 struct snd_soc_codec *codec = codec_dai->codec;
395 struct ssm2602_priv *ssm2602 = codec->private_data;
402 ssm2602->sysclk = freq;
408 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
411 struct snd_soc_codec *codec = codec_dai->codec;
414 /* set master/slave audio interface */
415 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
416 case SND_SOC_DAIFMT_CBM_CFM:
419 case SND_SOC_DAIFMT_CBS_CFS:
425 /* interface format */
426 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
427 case SND_SOC_DAIFMT_I2S:
430 case SND_SOC_DAIFMT_RIGHT_J:
432 case SND_SOC_DAIFMT_LEFT_J:
435 case SND_SOC_DAIFMT_DSP_A:
438 case SND_SOC_DAIFMT_DSP_B:
445 /* clock inversion */
446 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
447 case SND_SOC_DAIFMT_NB_NF:
449 case SND_SOC_DAIFMT_IB_IF:
452 case SND_SOC_DAIFMT_IB_NF:
455 case SND_SOC_DAIFMT_NB_IF:
463 ssm2602_write(codec, SSM2602_IFACE, iface);
467 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
468 enum snd_soc_bias_level level)
470 u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
473 case SND_SOC_BIAS_ON:
474 /* vref/mid, osc on, dac unmute */
475 ssm2602_write(codec, SSM2602_PWR, reg);
477 case SND_SOC_BIAS_PREPARE:
479 case SND_SOC_BIAS_STANDBY:
480 /* everything off except vref/vmid, */
481 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
483 case SND_SOC_BIAS_OFF:
484 /* everything off, dac mute, inactive */
485 ssm2602_write(codec, SSM2602_ACTIVE, 0);
486 ssm2602_write(codec, SSM2602_PWR, 0xffff);
490 codec->bias_level = level;
494 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
495 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
496 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
497 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
498 SNDRV_PCM_RATE_96000)
500 struct snd_soc_dai ssm2602_dai = {
503 .stream_name = "Playback",
506 .rates = SSM2602_RATES,
507 .formats = SNDRV_PCM_FMTBIT_S32_LE,},
509 .stream_name = "Capture",
512 .rates = SSM2602_RATES,
513 .formats = SNDRV_PCM_FMTBIT_S32_LE,},
515 .startup = ssm2602_startup,
516 .prepare = ssm2602_pcm_prepare,
517 .hw_params = ssm2602_hw_params,
518 .shutdown = ssm2602_shutdown,
521 .digital_mute = ssm2602_mute,
522 .set_sysclk = ssm2602_set_dai_sysclk,
523 .set_fmt = ssm2602_set_dai_fmt,
526 EXPORT_SYMBOL_GPL(ssm2602_dai);
528 static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
530 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
531 struct snd_soc_codec *codec = socdev->codec;
533 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
537 static int ssm2602_resume(struct platform_device *pdev)
539 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
540 struct snd_soc_codec *codec = socdev->codec;
543 u16 *cache = codec->reg_cache;
545 /* Sync reg_cache with the hardware */
546 for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
547 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
548 data[1] = cache[i] & 0x00ff;
549 codec->hw_write(codec->control_data, data, 2);
551 ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
552 ssm2602_set_bias_level(codec, codec->suspend_bias_level);
557 * initialise the ssm2602 driver
558 * register the mixer and dsp interfaces with the kernel
560 static int ssm2602_init(struct snd_soc_device *socdev)
562 struct snd_soc_codec *codec = socdev->codec;
565 codec->name = "SSM2602";
566 codec->owner = THIS_MODULE;
567 codec->read = ssm2602_read_reg_cache;
568 codec->write = ssm2602_write;
569 codec->set_bias_level = ssm2602_set_bias_level;
570 codec->dai = &ssm2602_dai;
572 codec->reg_cache_size = sizeof(ssm2602_reg);
573 codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
575 if (codec->reg_cache == NULL)
578 ssm2602_reset(codec);
581 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
583 pr_err("ssm2602: failed to create pcms\n");
587 ssm2602_write(codec, SSM2602_ACTIVE, 0);
588 /* set the update bits */
589 reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
590 ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
591 reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
592 ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
593 reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
594 ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
595 reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
596 ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
597 /*select Line in as default input*/
598 ssm2602_write(codec, SSM2602_APANA,
599 APANA_ENABLE_MIC_BOOST2 | APANA_SELECT_DAC |
600 APANA_ENABLE_MIC_BOOST);
601 ssm2602_write(codec, SSM2602_PWR, 0);
603 ssm2602_add_controls(codec);
604 ssm2602_add_widgets(codec);
605 ret = snd_soc_register_card(socdev);
607 pr_err("ssm2602: failed to register card\n");
614 snd_soc_free_pcms(socdev);
615 snd_soc_dapm_free(socdev);
617 kfree(codec->reg_cache);
621 static struct snd_soc_device *ssm2602_socdev;
623 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
625 * ssm2602 2 wire address is determined by GPIO5
626 * state during powerup.
630 static int ssm2602_i2c_probe(struct i2c_client *i2c,
631 const struct i2c_device_id *id)
633 struct snd_soc_device *socdev = ssm2602_socdev;
634 struct snd_soc_codec *codec = socdev->codec;
637 i2c_set_clientdata(i2c, codec);
638 codec->control_data = i2c;
640 ret = ssm2602_init(socdev);
642 pr_err("failed to initialise SSM2602\n");
647 static int ssm2602_i2c_remove(struct i2c_client *client)
649 struct snd_soc_codec *codec = i2c_get_clientdata(client);
650 kfree(codec->reg_cache);
654 static const struct i2c_device_id ssm2602_i2c_id[] = {
658 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
659 /* corgi i2c codec control layer */
660 static struct i2c_driver ssm2602_i2c_driver = {
662 .name = "SSM2602 I2C Codec",
663 .owner = THIS_MODULE,
665 .probe = ssm2602_i2c_probe,
666 .remove = ssm2602_i2c_remove,
667 .id_table = ssm2602_i2c_id,
670 static int ssm2602_add_i2c_device(struct platform_device *pdev,
671 const struct ssm2602_setup_data *setup)
673 struct i2c_board_info info;
674 struct i2c_adapter *adapter;
675 struct i2c_client *client;
678 ret = i2c_add_driver(&ssm2602_i2c_driver);
680 dev_err(&pdev->dev, "can't add i2c driver\n");
683 memset(&info, 0, sizeof(struct i2c_board_info));
684 info.addr = setup->i2c_address;
685 strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
686 adapter = i2c_get_adapter(setup->i2c_bus);
688 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
692 client = i2c_new_device(adapter, &info);
693 i2c_put_adapter(adapter);
695 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
696 (unsigned int)info.addr);
701 i2c_del_driver(&ssm2602_i2c_driver);
706 static int ssm2602_probe(struct platform_device *pdev)
708 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
709 struct ssm2602_setup_data *setup;
710 struct snd_soc_codec *codec;
711 struct ssm2602_priv *ssm2602;
714 pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
716 setup = socdev->codec_data;
717 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
721 ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
722 if (ssm2602 == NULL) {
727 codec->private_data = ssm2602;
728 socdev->codec = codec;
729 mutex_init(&codec->mutex);
730 INIT_LIST_HEAD(&codec->dapm_widgets);
731 INIT_LIST_HEAD(&codec->dapm_paths);
733 ssm2602_socdev = socdev;
734 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
735 if (setup->i2c_address) {
736 codec->hw_write = (hw_write_t)i2c_master_send;
737 ret = ssm2602_add_i2c_device(pdev, setup);
740 /* other interfaces */
745 /* remove everything here */
746 static int ssm2602_remove(struct platform_device *pdev)
748 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
749 struct snd_soc_codec *codec = socdev->codec;
751 if (codec->control_data)
752 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
754 snd_soc_free_pcms(socdev);
755 snd_soc_dapm_free(socdev);
756 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
757 i2c_unregister_device(codec->control_data);
758 i2c_del_driver(&ssm2602_i2c_driver);
760 kfree(codec->private_data);
766 struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
767 .probe = ssm2602_probe,
768 .remove = ssm2602_remove,
769 .suspend = ssm2602_suspend,
770 .resume = ssm2602_resume,
772 EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
774 MODULE_DESCRIPTION("ASoC ssm2602 driver");
775 MODULE_AUTHOR("Cliff Cai");
776 MODULE_LICENSE("GPL");