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 SSM2602_VERSION "0.1"
47 struct snd_soc_codec_device soc_codec_dev_ssm2602;
49 /* codec private data */
52 struct snd_pcm_substream *master_substream;
53 struct snd_pcm_substream *slave_substream;
57 * ssm2602 register cache
58 * We can't read the ssm2602 register space when we are
59 * using 2 wire for device control, so we cache them instead.
60 * There is no point in caching the reset register
62 static const u16 ssm2602_reg[SSM2602_CACHEREGNUM] = {
63 0x0017, 0x0017, 0x0079, 0x0079,
64 0x0000, 0x0000, 0x0000, 0x000a,
69 * read ssm2602 register cache
71 static inline unsigned int ssm2602_read_reg_cache(struct snd_soc_codec *codec,
74 u16 *cache = codec->reg_cache;
75 if (reg == SSM2602_RESET)
77 if (reg >= SSM2602_CACHEREGNUM)
83 * write ssm2602 register cache
85 static inline void ssm2602_write_reg_cache(struct snd_soc_codec *codec,
86 u16 reg, unsigned int value)
88 u16 *cache = codec->reg_cache;
89 if (reg >= SSM2602_CACHEREGNUM)
95 * write to the ssm2602 register space
97 static int ssm2602_write(struct snd_soc_codec *codec, unsigned int reg,
103 * D15..D9 ssm2602 register offset
104 * D8...D0 register data
106 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
107 data[1] = value & 0x00ff;
109 ssm2602_write_reg_cache(codec, reg, value);
110 if (codec->hw_write(codec->control_data, data, 2) == 2)
116 #define ssm2602_reset(c) ssm2602_write(c, SSM2602_RESET, 0)
118 /*Appending several "None"s just for OSS mixer use*/
119 static const char *ssm2602_input_select[] = {
120 "Line", "Mic", "None", "None", "None",
121 "None", "None", "None",
124 static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
126 static const struct soc_enum ssm2602_enum[] = {
127 SOC_ENUM_SINGLE(SSM2602_APANA, 2, 2, ssm2602_input_select),
128 SOC_ENUM_SINGLE(SSM2602_APDIGI, 1, 4, ssm2602_deemph),
131 static const struct snd_kcontrol_new ssm2602_snd_controls[] = {
133 SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
135 SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
138 SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
139 SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),
141 SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
142 SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
144 SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
146 SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
147 SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
149 SOC_ENUM("Capture Source", ssm2602_enum[0]),
151 SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
155 static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
156 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
157 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
158 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
162 static const struct snd_kcontrol_new ssm2602_input_mux_controls =
163 SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
165 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
166 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
167 &ssm2602_output_mixer_controls[0],
168 ARRAY_SIZE(ssm2602_output_mixer_controls)),
169 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
170 SND_SOC_DAPM_OUTPUT("LOUT"),
171 SND_SOC_DAPM_OUTPUT("LHPOUT"),
172 SND_SOC_DAPM_OUTPUT("ROUT"),
173 SND_SOC_DAPM_OUTPUT("RHPOUT"),
174 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
175 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
176 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
177 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
178 SND_SOC_DAPM_INPUT("MICIN"),
179 SND_SOC_DAPM_INPUT("RLINEIN"),
180 SND_SOC_DAPM_INPUT("LLINEIN"),
183 static const struct snd_soc_dapm_route audio_conn[] = {
185 {"Output Mixer", "Line Bypass Switch", "Line Input"},
186 {"Output Mixer", "HiFi Playback Switch", "DAC"},
187 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
190 {"RHPOUT", NULL, "Output Mixer"},
191 {"ROUT", NULL, "Output Mixer"},
192 {"LHPOUT", NULL, "Output Mixer"},
193 {"LOUT", NULL, "Output Mixer"},
196 {"Input Mux", "Line", "Line Input"},
197 {"Input Mux", "Mic", "Mic Bias"},
198 {"ADC", NULL, "Input Mux"},
201 {"Line Input", NULL, "LLINEIN"},
202 {"Line Input", NULL, "RLINEIN"},
203 {"Mic Bias", NULL, "MICIN"},
206 static int ssm2602_add_widgets(struct snd_soc_codec *codec)
208 snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
209 ARRAY_SIZE(ssm2602_dapm_widgets));
211 snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
213 snd_soc_dapm_new_widgets(codec);
226 /* codec mclk clock divider coefficients */
227 static const struct _coeff_div coeff_div[] = {
229 {12288000, 48000, 256, 0x0, 0x0, 0x0},
230 {18432000, 48000, 384, 0x0, 0x1, 0x0},
231 {12000000, 48000, 250, 0x0, 0x0, 0x1},
234 {12288000, 32000, 384, 0x6, 0x0, 0x0},
235 {18432000, 32000, 576, 0x6, 0x1, 0x0},
236 {12000000, 32000, 375, 0x6, 0x0, 0x1},
239 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
240 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
241 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
242 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
243 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
246 {12288000, 96000, 128, 0x7, 0x0, 0x0},
247 {18432000, 96000, 192, 0x7, 0x1, 0x0},
248 {12000000, 96000, 125, 0x7, 0x0, 0x1},
251 {11289600, 44100, 256, 0x8, 0x0, 0x0},
252 {16934400, 44100, 384, 0x8, 0x1, 0x0},
253 {12000000, 44100, 272, 0x8, 0x1, 0x1},
256 {11289600, 88200, 128, 0xf, 0x0, 0x0},
257 {16934400, 88200, 192, 0xf, 0x1, 0x0},
258 {12000000, 88200, 136, 0xf, 0x1, 0x1},
261 static inline int get_coeff(int mclk, int rate)
265 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
266 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
272 static int ssm2602_hw_params(struct snd_pcm_substream *substream,
273 struct snd_pcm_hw_params *params,
274 struct snd_soc_dai *dai)
277 struct snd_soc_pcm_runtime *rtd = substream->private_data;
278 struct snd_soc_device *socdev = rtd->socdev;
279 struct snd_soc_codec *codec = socdev->codec;
280 struct ssm2602_priv *ssm2602 = codec->private_data;
281 struct i2c_client *i2c = codec->control_data;
282 u16 iface = ssm2602_read_reg_cache(codec, SSM2602_IFACE) & 0xfff3;
283 int i = get_coeff(ssm2602->sysclk, params_rate(params));
285 if (substream == ssm2602->slave_substream) {
286 dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
290 /*no match is found*/
291 if (i == ARRAY_SIZE(coeff_div))
294 srate = (coeff_div[i].sr << 2) |
295 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
297 ssm2602_write(codec, SSM2602_ACTIVE, 0);
298 ssm2602_write(codec, SSM2602_SRATE, srate);
301 switch (params_format(params)) {
302 case SNDRV_PCM_FORMAT_S16_LE:
304 case SNDRV_PCM_FORMAT_S20_3LE:
307 case SNDRV_PCM_FORMAT_S24_LE:
310 case SNDRV_PCM_FORMAT_S32_LE:
314 ssm2602_write(codec, SSM2602_IFACE, iface);
315 ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
319 static int ssm2602_startup(struct snd_pcm_substream *substream,
320 struct snd_soc_dai *dai)
322 struct snd_soc_pcm_runtime *rtd = substream->private_data;
323 struct snd_soc_device *socdev = rtd->socdev;
324 struct snd_soc_codec *codec = socdev->codec;
325 struct ssm2602_priv *ssm2602 = codec->private_data;
326 struct i2c_client *i2c = codec->control_data;
327 struct snd_pcm_runtime *master_runtime;
329 /* The DAI has shared clocks so if we already have a playback or
330 * capture going then constrain this substream to match it.
331 * TODO: the ssm2602 allows pairs of non-matching PB/REC rates
333 if (ssm2602->master_substream) {
334 master_runtime = ssm2602->master_substream->runtime;
335 dev_dbg(&i2c->dev, "Constraining to %d bits at %dHz\n",
336 master_runtime->sample_bits,
337 master_runtime->rate);
339 snd_pcm_hw_constraint_minmax(substream->runtime,
340 SNDRV_PCM_HW_PARAM_RATE,
341 master_runtime->rate,
342 master_runtime->rate);
344 snd_pcm_hw_constraint_minmax(substream->runtime,
345 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
346 master_runtime->sample_bits,
347 master_runtime->sample_bits);
349 ssm2602->slave_substream = substream;
351 ssm2602->master_substream = substream;
356 static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream,
357 struct snd_soc_dai *dai)
359 struct snd_soc_pcm_runtime *rtd = substream->private_data;
360 struct snd_soc_device *socdev = rtd->socdev;
361 struct snd_soc_codec *codec = socdev->codec;
363 ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
368 static void ssm2602_shutdown(struct snd_pcm_substream *substream,
369 struct snd_soc_dai *dai)
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;
374 struct ssm2602_priv *ssm2602 = codec->private_data;
377 ssm2602_write(codec, SSM2602_ACTIVE, 0);
379 if (ssm2602->master_substream == substream)
380 ssm2602->master_substream = ssm2602->slave_substream;
382 ssm2602->slave_substream = NULL;
385 static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
387 struct snd_soc_codec *codec = dai->codec;
388 u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
390 ssm2602_write(codec, SSM2602_APDIGI,
391 mute_reg | APDIGI_ENABLE_DAC_MUTE);
393 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
397 static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
398 int clk_id, unsigned int freq, int dir)
400 struct snd_soc_codec *codec = codec_dai->codec;
401 struct ssm2602_priv *ssm2602 = codec->private_data;
408 ssm2602->sysclk = freq;
414 static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
417 struct snd_soc_codec *codec = codec_dai->codec;
420 /* set master/slave audio interface */
421 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
422 case SND_SOC_DAIFMT_CBM_CFM:
425 case SND_SOC_DAIFMT_CBS_CFS:
431 /* interface format */
432 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
433 case SND_SOC_DAIFMT_I2S:
436 case SND_SOC_DAIFMT_RIGHT_J:
438 case SND_SOC_DAIFMT_LEFT_J:
441 case SND_SOC_DAIFMT_DSP_A:
444 case SND_SOC_DAIFMT_DSP_B:
451 /* clock inversion */
452 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
453 case SND_SOC_DAIFMT_NB_NF:
455 case SND_SOC_DAIFMT_IB_IF:
458 case SND_SOC_DAIFMT_IB_NF:
461 case SND_SOC_DAIFMT_NB_IF:
469 ssm2602_write(codec, SSM2602_IFACE, iface);
473 static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
474 enum snd_soc_bias_level level)
476 u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
479 case SND_SOC_BIAS_ON:
480 /* vref/mid, osc on, dac unmute */
481 ssm2602_write(codec, SSM2602_PWR, reg);
483 case SND_SOC_BIAS_PREPARE:
485 case SND_SOC_BIAS_STANDBY:
486 /* everything off except vref/vmid, */
487 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
489 case SND_SOC_BIAS_OFF:
490 /* everything off, dac mute, inactive */
491 ssm2602_write(codec, SSM2602_ACTIVE, 0);
492 ssm2602_write(codec, SSM2602_PWR, 0xffff);
496 codec->bias_level = level;
500 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
501 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
502 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
503 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
504 SNDRV_PCM_RATE_96000)
506 #define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
507 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
509 struct snd_soc_dai ssm2602_dai = {
512 .stream_name = "Playback",
515 .rates = SSM2602_RATES,
516 .formats = SSM2602_FORMATS,},
518 .stream_name = "Capture",
521 .rates = SSM2602_RATES,
522 .formats = SSM2602_FORMATS,},
524 .startup = ssm2602_startup,
525 .prepare = ssm2602_pcm_prepare,
526 .hw_params = ssm2602_hw_params,
527 .shutdown = ssm2602_shutdown,
528 .digital_mute = ssm2602_mute,
529 .set_sysclk = ssm2602_set_dai_sysclk,
530 .set_fmt = ssm2602_set_dai_fmt,
533 EXPORT_SYMBOL_GPL(ssm2602_dai);
535 static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
537 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
538 struct snd_soc_codec *codec = socdev->codec;
540 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
544 static int ssm2602_resume(struct platform_device *pdev)
546 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
547 struct snd_soc_codec *codec = socdev->codec;
550 u16 *cache = codec->reg_cache;
552 /* Sync reg_cache with the hardware */
553 for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
554 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
555 data[1] = cache[i] & 0x00ff;
556 codec->hw_write(codec->control_data, data, 2);
558 ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
559 ssm2602_set_bias_level(codec, codec->suspend_bias_level);
564 * initialise the ssm2602 driver
565 * register the mixer and dsp interfaces with the kernel
567 static int ssm2602_init(struct snd_soc_device *socdev)
569 struct snd_soc_codec *codec = socdev->codec;
572 codec->name = "SSM2602";
573 codec->owner = THIS_MODULE;
574 codec->read = ssm2602_read_reg_cache;
575 codec->write = ssm2602_write;
576 codec->set_bias_level = ssm2602_set_bias_level;
577 codec->dai = &ssm2602_dai;
579 codec->reg_cache_size = sizeof(ssm2602_reg);
580 codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
582 if (codec->reg_cache == NULL)
585 ssm2602_reset(codec);
588 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
590 pr_err("ssm2602: failed to create pcms\n");
594 ssm2602_write(codec, SSM2602_ACTIVE, 0);
595 /* set the update bits */
596 reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
597 ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
598 reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
599 ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
600 reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
601 ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
602 reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
603 ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
604 /*select Line in as default input*/
605 ssm2602_write(codec, SSM2602_APANA,
606 APANA_ENABLE_MIC_BOOST2 | APANA_SELECT_DAC |
607 APANA_ENABLE_MIC_BOOST);
608 ssm2602_write(codec, SSM2602_PWR, 0);
610 snd_soc_add_controls(codec, ssm2602_snd_controls,
611 ARRAY_SIZE(ssm2602_snd_controls));
612 ssm2602_add_widgets(codec);
613 ret = snd_soc_init_card(socdev);
615 pr_err("ssm2602: failed to register card\n");
622 snd_soc_free_pcms(socdev);
623 snd_soc_dapm_free(socdev);
625 kfree(codec->reg_cache);
629 static struct snd_soc_device *ssm2602_socdev;
631 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
633 * ssm2602 2 wire address is determined by GPIO5
634 * state during powerup.
638 static int ssm2602_i2c_probe(struct i2c_client *i2c,
639 const struct i2c_device_id *id)
641 struct snd_soc_device *socdev = ssm2602_socdev;
642 struct snd_soc_codec *codec = socdev->codec;
645 i2c_set_clientdata(i2c, codec);
646 codec->control_data = i2c;
648 ret = ssm2602_init(socdev);
650 pr_err("failed to initialise SSM2602\n");
655 static int ssm2602_i2c_remove(struct i2c_client *client)
657 struct snd_soc_codec *codec = i2c_get_clientdata(client);
658 kfree(codec->reg_cache);
662 static const struct i2c_device_id ssm2602_i2c_id[] = {
666 MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
667 /* corgi i2c codec control layer */
668 static struct i2c_driver ssm2602_i2c_driver = {
670 .name = "SSM2602 I2C Codec",
671 .owner = THIS_MODULE,
673 .probe = ssm2602_i2c_probe,
674 .remove = ssm2602_i2c_remove,
675 .id_table = ssm2602_i2c_id,
678 static int ssm2602_add_i2c_device(struct platform_device *pdev,
679 const struct ssm2602_setup_data *setup)
681 struct i2c_board_info info;
682 struct i2c_adapter *adapter;
683 struct i2c_client *client;
686 ret = i2c_add_driver(&ssm2602_i2c_driver);
688 dev_err(&pdev->dev, "can't add i2c driver\n");
691 memset(&info, 0, sizeof(struct i2c_board_info));
692 info.addr = setup->i2c_address;
693 strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
694 adapter = i2c_get_adapter(setup->i2c_bus);
696 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
700 client = i2c_new_device(adapter, &info);
701 i2c_put_adapter(adapter);
703 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
704 (unsigned int)info.addr);
709 i2c_del_driver(&ssm2602_i2c_driver);
714 static int ssm2602_probe(struct platform_device *pdev)
716 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
717 struct ssm2602_setup_data *setup;
718 struct snd_soc_codec *codec;
719 struct ssm2602_priv *ssm2602;
722 pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
724 setup = socdev->codec_data;
725 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
729 ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
730 if (ssm2602 == NULL) {
735 codec->private_data = ssm2602;
736 socdev->codec = codec;
737 mutex_init(&codec->mutex);
738 INIT_LIST_HEAD(&codec->dapm_widgets);
739 INIT_LIST_HEAD(&codec->dapm_paths);
741 ssm2602_socdev = socdev;
742 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
743 if (setup->i2c_address) {
744 codec->hw_write = (hw_write_t)i2c_master_send;
745 ret = ssm2602_add_i2c_device(pdev, setup);
748 /* other interfaces */
753 /* remove everything here */
754 static int ssm2602_remove(struct platform_device *pdev)
756 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
757 struct snd_soc_codec *codec = socdev->codec;
759 if (codec->control_data)
760 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
762 snd_soc_free_pcms(socdev);
763 snd_soc_dapm_free(socdev);
764 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
765 i2c_unregister_device(codec->control_data);
766 i2c_del_driver(&ssm2602_i2c_driver);
768 kfree(codec->private_data);
774 struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
775 .probe = ssm2602_probe,
776 .remove = ssm2602_remove,
777 .suspend = ssm2602_suspend,
778 .resume = ssm2602_resume,
780 EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
782 static int __init ssm2602_modinit(void)
784 return snd_soc_register_dai(&ssm2602_dai);
786 module_init(ssm2602_modinit);
788 static void __exit ssm2602_exit(void)
790 snd_soc_unregister_dai(&ssm2602_dai);
792 module_exit(ssm2602_exit);
794 MODULE_DESCRIPTION("ASoC ssm2602 driver");
795 MODULE_AUTHOR("Cliff Cai");
796 MODULE_LICENSE("GPL");