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]),
154 /* add non dapm controls */
155 static int ssm2602_add_controls(struct snd_soc_codec
*codec
)
159 for (i
= 0; i
< ARRAY_SIZE(ssm2602_snd_controls
); i
++) {
160 err
= snd_ctl_add(codec
->card
,
161 snd_soc_cnew(&ssm2602_snd_controls
[i
], codec
, NULL
));
170 static const struct snd_kcontrol_new ssm2602_output_mixer_controls
[] = {
171 SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA
, 3, 1, 0),
172 SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA
, 5, 1, 0),
173 SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA
, 4, 1, 0),
177 static const struct snd_kcontrol_new ssm2602_input_mux_controls
=
178 SOC_DAPM_ENUM("Input Select", ssm2602_enum
[0]);
180 static const struct snd_soc_dapm_widget ssm2602_dapm_widgets
[] = {
181 SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR
, 4, 1,
182 &ssm2602_output_mixer_controls
[0],
183 ARRAY_SIZE(ssm2602_output_mixer_controls
)),
184 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR
, 3, 1),
185 SND_SOC_DAPM_OUTPUT("LOUT"),
186 SND_SOC_DAPM_OUTPUT("LHPOUT"),
187 SND_SOC_DAPM_OUTPUT("ROUT"),
188 SND_SOC_DAPM_OUTPUT("RHPOUT"),
189 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR
, 2, 1),
190 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM
, 0, 0, &ssm2602_input_mux_controls
),
191 SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR
, 0, 1, NULL
, 0),
192 SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR
, 1, 1),
193 SND_SOC_DAPM_INPUT("MICIN"),
194 SND_SOC_DAPM_INPUT("RLINEIN"),
195 SND_SOC_DAPM_INPUT("LLINEIN"),
198 static const struct snd_soc_dapm_route audio_conn
[] = {
200 {"Output Mixer", "Line Bypass Switch", "Line Input"},
201 {"Output Mixer", "HiFi Playback Switch", "DAC"},
202 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
205 {"RHPOUT", NULL
, "Output Mixer"},
206 {"ROUT", NULL
, "Output Mixer"},
207 {"LHPOUT", NULL
, "Output Mixer"},
208 {"LOUT", NULL
, "Output Mixer"},
211 {"Input Mux", "Line", "Line Input"},
212 {"Input Mux", "Mic", "Mic Bias"},
213 {"ADC", NULL
, "Input Mux"},
216 {"Line Input", NULL
, "LLINEIN"},
217 {"Line Input", NULL
, "RLINEIN"},
218 {"Mic Bias", NULL
, "MICIN"},
221 static int ssm2602_add_widgets(struct snd_soc_codec
*codec
)
223 snd_soc_dapm_new_controls(codec
, ssm2602_dapm_widgets
,
224 ARRAY_SIZE(ssm2602_dapm_widgets
));
226 snd_soc_dapm_add_routes(codec
, audio_conn
, ARRAY_SIZE(audio_conn
));
228 snd_soc_dapm_new_widgets(codec
);
241 /* codec mclk clock divider coefficients */
242 static const struct _coeff_div coeff_div
[] = {
244 {12288000, 48000, 256, 0x0, 0x0, 0x0},
245 {18432000, 48000, 384, 0x0, 0x1, 0x0},
246 {12000000, 48000, 250, 0x0, 0x0, 0x1},
249 {12288000, 32000, 384, 0x6, 0x0, 0x0},
250 {18432000, 32000, 576, 0x6, 0x1, 0x0},
251 {12000000, 32000, 375, 0x6, 0x0, 0x1},
254 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
255 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
256 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
257 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
258 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
261 {12288000, 96000, 128, 0x7, 0x0, 0x0},
262 {18432000, 96000, 192, 0x7, 0x1, 0x0},
263 {12000000, 96000, 125, 0x7, 0x0, 0x1},
266 {11289600, 44100, 256, 0x8, 0x0, 0x0},
267 {16934400, 44100, 384, 0x8, 0x1, 0x0},
268 {12000000, 44100, 272, 0x8, 0x1, 0x1},
271 {11289600, 88200, 128, 0xf, 0x0, 0x0},
272 {16934400, 88200, 192, 0xf, 0x1, 0x0},
273 {12000000, 88200, 136, 0xf, 0x1, 0x1},
276 static inline int get_coeff(int mclk
, int rate
)
280 for (i
= 0; i
< ARRAY_SIZE(coeff_div
); i
++) {
281 if (coeff_div
[i
].rate
== rate
&& coeff_div
[i
].mclk
== mclk
)
287 static int ssm2602_hw_params(struct snd_pcm_substream
*substream
,
288 struct snd_pcm_hw_params
*params
)
291 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
292 struct snd_soc_device
*socdev
= rtd
->socdev
;
293 struct snd_soc_codec
*codec
= socdev
->codec
;
294 struct ssm2602_priv
*ssm2602
= codec
->private_data
;
295 u16 iface
= ssm2602_read_reg_cache(codec
, SSM2602_IFACE
) & 0xfff3;
296 int i
= get_coeff(ssm2602
->sysclk
, params_rate(params
));
298 /*no match is found*/
299 if (i
== ARRAY_SIZE(coeff_div
))
302 srate
= (coeff_div
[i
].sr
<< 2) |
303 (coeff_div
[i
].bosr
<< 1) | coeff_div
[i
].usb
;
305 ssm2602_write(codec
, SSM2602_ACTIVE
, 0);
306 ssm2602_write(codec
, SSM2602_SRATE
, srate
);
309 switch (params_format(params
)) {
310 case SNDRV_PCM_FORMAT_S16_LE
:
312 case SNDRV_PCM_FORMAT_S20_3LE
:
315 case SNDRV_PCM_FORMAT_S24_LE
:
318 case SNDRV_PCM_FORMAT_S32_LE
:
322 ssm2602_write(codec
, SSM2602_IFACE
, iface
);
323 ssm2602_write(codec
, SSM2602_ACTIVE
, ACTIVE_ACTIVATE_CODEC
);
327 static int ssm2602_startup(struct snd_pcm_substream
*substream
)
329 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
330 struct snd_soc_device
*socdev
= rtd
->socdev
;
331 struct snd_soc_codec
*codec
= socdev
->codec
;
332 struct ssm2602_priv
*ssm2602
= codec
->private_data
;
333 struct snd_pcm_runtime
*master_runtime
;
335 /* The DAI has shared clocks so if we already have a playback or
336 * capture going then constrain this substream to match it.
338 if (ssm2602
->master_substream
) {
339 master_runtime
= ssm2602
->master_substream
->runtime
;
340 snd_pcm_hw_constraint_minmax(substream
->runtime
,
341 SNDRV_PCM_HW_PARAM_RATE
,
342 master_runtime
->rate
,
343 master_runtime
->rate
);
345 snd_pcm_hw_constraint_minmax(substream
->runtime
,
346 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
347 master_runtime
->sample_bits
,
348 master_runtime
->sample_bits
);
350 ssm2602
->slave_substream
= substream
;
352 ssm2602
->master_substream
= substream
;
357 static int ssm2602_pcm_prepare(struct snd_pcm_substream
*substream
)
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
)
370 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
371 struct snd_soc_device
*socdev
= rtd
->socdev
;
372 struct snd_soc_codec
*codec
= socdev
->codec
;
375 ssm2602_write(codec
, SSM2602_ACTIVE
, 0);
378 static int ssm2602_mute(struct snd_soc_dai
*dai
, int mute
)
380 struct snd_soc_codec
*codec
= dai
->codec
;
381 u16 mute_reg
= ssm2602_read_reg_cache(codec
, SSM2602_APDIGI
) & ~APDIGI_ENABLE_DAC_MUTE
;
383 ssm2602_write(codec
, SSM2602_APDIGI
,
384 mute_reg
| APDIGI_ENABLE_DAC_MUTE
);
386 ssm2602_write(codec
, SSM2602_APDIGI
, mute_reg
);
390 static int ssm2602_set_dai_sysclk(struct snd_soc_dai
*codec_dai
,
391 int clk_id
, unsigned int freq
, int dir
)
393 struct snd_soc_codec
*codec
= codec_dai
->codec
;
394 struct ssm2602_priv
*ssm2602
= codec
->private_data
;
401 ssm2602
->sysclk
= freq
;
407 static int ssm2602_set_dai_fmt(struct snd_soc_dai
*codec_dai
,
410 struct snd_soc_codec
*codec
= codec_dai
->codec
;
413 /* set master/slave audio interface */
414 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
415 case SND_SOC_DAIFMT_CBM_CFM
:
418 case SND_SOC_DAIFMT_CBS_CFS
:
424 /* interface format */
425 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
426 case SND_SOC_DAIFMT_I2S
:
429 case SND_SOC_DAIFMT_RIGHT_J
:
431 case SND_SOC_DAIFMT_LEFT_J
:
434 case SND_SOC_DAIFMT_DSP_A
:
437 case SND_SOC_DAIFMT_DSP_B
:
444 /* clock inversion */
445 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
446 case SND_SOC_DAIFMT_NB_NF
:
448 case SND_SOC_DAIFMT_IB_IF
:
451 case SND_SOC_DAIFMT_IB_NF
:
454 case SND_SOC_DAIFMT_NB_IF
:
462 ssm2602_write(codec
, SSM2602_IFACE
, iface
);
466 static int ssm2602_set_bias_level(struct snd_soc_codec
*codec
,
467 enum snd_soc_bias_level level
)
469 u16 reg
= ssm2602_read_reg_cache(codec
, SSM2602_PWR
) & 0xff7f;
472 case SND_SOC_BIAS_ON
:
473 /* vref/mid, osc on, dac unmute */
474 ssm2602_write(codec
, SSM2602_PWR
, reg
);
476 case SND_SOC_BIAS_PREPARE
:
478 case SND_SOC_BIAS_STANDBY
:
479 /* everything off except vref/vmid, */
480 ssm2602_write(codec
, SSM2602_PWR
, reg
| PWR_CLK_OUT_PDN
);
482 case SND_SOC_BIAS_OFF
:
483 /* everything off, dac mute, inactive */
484 ssm2602_write(codec
, SSM2602_ACTIVE
, 0);
485 ssm2602_write(codec
, SSM2602_PWR
, 0xffff);
489 codec
->bias_level
= level
;
493 #define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
494 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
495 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
496 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
497 SNDRV_PCM_RATE_96000)
499 struct snd_soc_dai ssm2602_dai
= {
502 .stream_name
= "Playback",
505 .rates
= SSM2602_RATES
,
506 .formats
= SNDRV_PCM_FMTBIT_S32_LE
,},
508 .stream_name
= "Capture",
511 .rates
= SSM2602_RATES
,
512 .formats
= SNDRV_PCM_FMTBIT_S32_LE
,},
514 .startup
= ssm2602_startup
,
515 .prepare
= ssm2602_pcm_prepare
,
516 .hw_params
= ssm2602_hw_params
,
517 .shutdown
= ssm2602_shutdown
,
520 .digital_mute
= ssm2602_mute
,
521 .set_sysclk
= ssm2602_set_dai_sysclk
,
522 .set_fmt
= ssm2602_set_dai_fmt
,
525 EXPORT_SYMBOL_GPL(ssm2602_dai
);
527 static int ssm2602_suspend(struct platform_device
*pdev
, pm_message_t state
)
529 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
530 struct snd_soc_codec
*codec
= socdev
->codec
;
532 ssm2602_set_bias_level(codec
, SND_SOC_BIAS_OFF
);
536 static int ssm2602_resume(struct platform_device
*pdev
)
538 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
539 struct snd_soc_codec
*codec
= socdev
->codec
;
542 u16
*cache
= codec
->reg_cache
;
544 /* Sync reg_cache with the hardware */
545 for (i
= 0; i
< ARRAY_SIZE(ssm2602_reg
); i
++) {
546 data
[0] = (i
<< 1) | ((cache
[i
] >> 8) & 0x0001);
547 data
[1] = cache
[i
] & 0x00ff;
548 codec
->hw_write(codec
->control_data
, data
, 2);
550 ssm2602_set_bias_level(codec
, SND_SOC_BIAS_STANDBY
);
551 ssm2602_set_bias_level(codec
, codec
->suspend_bias_level
);
556 * initialise the ssm2602 driver
557 * register the mixer and dsp interfaces with the kernel
559 static int ssm2602_init(struct snd_soc_device
*socdev
)
561 struct snd_soc_codec
*codec
= socdev
->codec
;
564 codec
->name
= "SSM2602";
565 codec
->owner
= THIS_MODULE
;
566 codec
->read
= ssm2602_read_reg_cache
;
567 codec
->write
= ssm2602_write
;
568 codec
->set_bias_level
= ssm2602_set_bias_level
;
569 codec
->dai
= &ssm2602_dai
;
571 codec
->reg_cache_size
= sizeof(ssm2602_reg
);
572 codec
->reg_cache
= kmemdup(ssm2602_reg
, sizeof(ssm2602_reg
),
574 if (codec
->reg_cache
== NULL
)
577 ssm2602_reset(codec
);
580 ret
= snd_soc_new_pcms(socdev
, SNDRV_DEFAULT_IDX1
, SNDRV_DEFAULT_STR1
);
582 pr_err("ssm2602: failed to create pcms\n");
586 ssm2602_write(codec
, SSM2602_ACTIVE
, 0);
587 /* set the update bits */
588 reg
= ssm2602_read_reg_cache(codec
, SSM2602_LINVOL
);
589 ssm2602_write(codec
, SSM2602_LINVOL
, reg
| LINVOL_LRIN_BOTH
);
590 reg
= ssm2602_read_reg_cache(codec
, SSM2602_RINVOL
);
591 ssm2602_write(codec
, SSM2602_RINVOL
, reg
| RINVOL_RLIN_BOTH
);
592 reg
= ssm2602_read_reg_cache(codec
, SSM2602_LOUT1V
);
593 ssm2602_write(codec
, SSM2602_LOUT1V
, reg
| LOUT1V_LRHP_BOTH
);
594 reg
= ssm2602_read_reg_cache(codec
, SSM2602_ROUT1V
);
595 ssm2602_write(codec
, SSM2602_ROUT1V
, reg
| ROUT1V_RLHP_BOTH
);
596 /*select Line in as default input*/
597 ssm2602_write(codec
, SSM2602_APANA
,
598 APANA_ENABLE_MIC_BOOST2
| APANA_SELECT_DAC
|
599 APANA_ENABLE_MIC_BOOST
);
600 ssm2602_write(codec
, SSM2602_PWR
, 0);
602 ssm2602_add_controls(codec
);
603 ssm2602_add_widgets(codec
);
604 ret
= snd_soc_register_card(socdev
);
606 pr_err("ssm2602: failed to register card\n");
613 snd_soc_free_pcms(socdev
);
614 snd_soc_dapm_free(socdev
);
616 kfree(codec
->reg_cache
);
620 static struct snd_soc_device
*ssm2602_socdev
;
622 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
624 * ssm2602 2 wire address is determined by GPIO5
625 * state during powerup.
629 static int ssm2602_i2c_probe(struct i2c_client
*i2c
,
630 const struct i2c_device_id
*id
)
632 struct snd_soc_device
*socdev
= ssm2602_socdev
;
633 struct snd_soc_codec
*codec
= socdev
->codec
;
636 i2c_set_clientdata(i2c
, codec
);
637 codec
->control_data
= i2c
;
639 ret
= ssm2602_init(socdev
);
641 pr_err("failed to initialise SSM2602\n");
646 static int ssm2602_i2c_remove(struct i2c_client
*client
)
648 struct snd_soc_codec
*codec
= i2c_get_clientdata(client
);
649 kfree(codec
->reg_cache
);
653 static const struct i2c_device_id ssm2602_i2c_id
[] = {
657 MODULE_DEVICE_TABLE(i2c
, ssm2602_i2c_id
);
658 /* corgi i2c codec control layer */
659 static struct i2c_driver ssm2602_i2c_driver
= {
661 .name
= "SSM2602 I2C Codec",
662 .owner
= THIS_MODULE
,
664 .probe
= ssm2602_i2c_probe
,
665 .remove
= ssm2602_i2c_remove
,
666 .id_table
= ssm2602_i2c_id
,
669 static int ssm2602_add_i2c_device(struct platform_device
*pdev
,
670 const struct ssm2602_setup_data
*setup
)
672 struct i2c_board_info info
;
673 struct i2c_adapter
*adapter
;
674 struct i2c_client
*client
;
677 ret
= i2c_add_driver(&ssm2602_i2c_driver
);
679 dev_err(&pdev
->dev
, "can't add i2c driver\n");
682 memset(&info
, 0, sizeof(struct i2c_board_info
));
683 info
.addr
= setup
->i2c_address
;
684 strlcpy(info
.type
, "ssm2602", I2C_NAME_SIZE
);
685 adapter
= i2c_get_adapter(setup
->i2c_bus
);
687 dev_err(&pdev
->dev
, "can't get i2c adapter %d\n",
691 client
= i2c_new_device(adapter
, &info
);
692 i2c_put_adapter(adapter
);
694 dev_err(&pdev
->dev
, "can't add i2c device at 0x%x\n",
695 (unsigned int)info
.addr
);
700 i2c_del_driver(&ssm2602_i2c_driver
);
705 static int ssm2602_probe(struct platform_device
*pdev
)
707 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
708 struct ssm2602_setup_data
*setup
;
709 struct snd_soc_codec
*codec
;
710 struct ssm2602_priv
*ssm2602
;
713 pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION
);
715 setup
= socdev
->codec_data
;
716 codec
= kzalloc(sizeof(struct snd_soc_codec
), GFP_KERNEL
);
720 ssm2602
= kzalloc(sizeof(struct ssm2602_priv
), GFP_KERNEL
);
721 if (ssm2602
== NULL
) {
726 codec
->private_data
= ssm2602
;
727 socdev
->codec
= codec
;
728 mutex_init(&codec
->mutex
);
729 INIT_LIST_HEAD(&codec
->dapm_widgets
);
730 INIT_LIST_HEAD(&codec
->dapm_paths
);
732 ssm2602_socdev
= socdev
;
733 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
734 if (setup
->i2c_address
) {
735 codec
->hw_write
= (hw_write_t
)i2c_master_send
;
736 ret
= ssm2602_add_i2c_device(pdev
, setup
);
739 /* other interfaces */
744 /* remove everything here */
745 static int ssm2602_remove(struct platform_device
*pdev
)
747 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
748 struct snd_soc_codec
*codec
= socdev
->codec
;
750 if (codec
->control_data
)
751 ssm2602_set_bias_level(codec
, SND_SOC_BIAS_OFF
);
753 snd_soc_free_pcms(socdev
);
754 snd_soc_dapm_free(socdev
);
755 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
756 i2c_unregister_device(codec
->control_data
);
757 i2c_del_driver(&ssm2602_i2c_driver
);
759 kfree(codec
->private_data
);
765 struct snd_soc_codec_device soc_codec_dev_ssm2602
= {
766 .probe
= ssm2602_probe
,
767 .remove
= ssm2602_remove
,
768 .suspend
= ssm2602_suspend
,
769 .resume
= ssm2602_resume
,
771 EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602
);
773 MODULE_DESCRIPTION("ASoC ssm2602 driver");
774 MODULE_AUTHOR("Cliff Cai");
775 MODULE_LICENSE("GPL");