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29#include <linux/module.h>
30#include <linux/moduleparam.h>
31#include <linux/init.h>
32#include <linux/delay.h>
33#include <linux/pm.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>
42
43#include "ssm2602.h"
44
45#define SSM2602_VERSION "0.1"
46
47struct snd_soc_codec_device soc_codec_dev_ssm2602;
48
49
50struct ssm2602_priv {
51 unsigned int sysclk;
52 struct snd_pcm_substream *master_substream;
53 struct snd_pcm_substream *slave_substream;
54};
55
56
57
58
59
60
61
62static const u16 ssm2602_reg[SSM2602_CACHEREGNUM] = {
63 0x0017, 0x0017, 0x0079, 0x0079,
64 0x0000, 0x0000, 0x0000, 0x000a,
65 0x0000, 0x0000
66};
67
68
69
70
71static inline unsigned int ssm2602_read_reg_cache(struct snd_soc_codec *codec,
72 unsigned int reg)
73{
74 u16 *cache = codec->reg_cache;
75 if (reg == SSM2602_RESET)
76 return 0;
77 if (reg >= SSM2602_CACHEREGNUM)
78 return -1;
79 return cache[reg];
80}
81
82
83
84
85static inline void ssm2602_write_reg_cache(struct snd_soc_codec *codec,
86 u16 reg, unsigned int value)
87{
88 u16 *cache = codec->reg_cache;
89 if (reg >= SSM2602_CACHEREGNUM)
90 return;
91 cache[reg] = value;
92}
93
94
95
96
97static int ssm2602_write(struct snd_soc_codec *codec, unsigned int reg,
98 unsigned int value)
99{
100 u8 data[2];
101
102
103
104
105
106 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
107 data[1] = value & 0x00ff;
108
109 ssm2602_write_reg_cache(codec, reg, value);
110 if (codec->hw_write(codec->control_data, data, 2) == 2)
111 return 0;
112 else
113 return -EIO;
114}
115
116#define ssm2602_reset(c) ssm2602_write(c, SSM2602_RESET, 0)
117
118
119static const char *ssm2602_input_select[] = {
120 "Line", "Mic", "None", "None", "None",
121 "None", "None", "None",
122};
123
124static const char *ssm2602_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
125
126static 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),
129};
130
131static const struct snd_kcontrol_new ssm2602_snd_controls[] = {
132
133SOC_DOUBLE_R("Master Playback Volume", SSM2602_LOUT1V, SSM2602_ROUT1V,
134 0, 127, 0),
135SOC_DOUBLE_R("Master Playback ZC Switch", SSM2602_LOUT1V, SSM2602_ROUT1V,
136 7, 1, 0),
137
138SOC_DOUBLE_R("Capture Volume", SSM2602_LINVOL, SSM2602_RINVOL, 0, 31, 0),
139SOC_DOUBLE_R("Capture Switch", SSM2602_LINVOL, SSM2602_RINVOL, 7, 1, 1),
140
141SOC_SINGLE("Mic Boost (+20dB)", SSM2602_APANA, 0, 1, 0),
142SOC_SINGLE("Mic Switch", SSM2602_APANA, 1, 1, 1),
143
144SOC_SINGLE("Sidetone Playback Volume", SSM2602_APANA, 6, 3, 1),
145
146SOC_SINGLE("ADC High Pass Filter Switch", SSM2602_APDIGI, 0, 1, 1),
147SOC_SINGLE("Store DC Offset Switch", SSM2602_APDIGI, 4, 1, 0),
148
149SOC_ENUM("Capture Source", ssm2602_enum[0]),
150
151SOC_ENUM("Playback De-emphasis", ssm2602_enum[1]),
152};
153
154
155static const struct snd_kcontrol_new ssm2602_output_mixer_controls[] = {
156SOC_DAPM_SINGLE("Line Bypass Switch", SSM2602_APANA, 3, 1, 0),
157SOC_DAPM_SINGLE("Mic Sidetone Switch", SSM2602_APANA, 5, 1, 0),
158SOC_DAPM_SINGLE("HiFi Playback Switch", SSM2602_APANA, 4, 1, 0),
159};
160
161
162static const struct snd_kcontrol_new ssm2602_input_mux_controls =
163SOC_DAPM_ENUM("Input Select", ssm2602_enum[0]);
164
165static const struct snd_soc_dapm_widget ssm2602_dapm_widgets[] = {
166SND_SOC_DAPM_MIXER("Output Mixer", SSM2602_PWR, 4, 1,
167 &ssm2602_output_mixer_controls[0],
168 ARRAY_SIZE(ssm2602_output_mixer_controls)),
169SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM2602_PWR, 3, 1),
170SND_SOC_DAPM_OUTPUT("LOUT"),
171SND_SOC_DAPM_OUTPUT("LHPOUT"),
172SND_SOC_DAPM_OUTPUT("ROUT"),
173SND_SOC_DAPM_OUTPUT("RHPOUT"),
174SND_SOC_DAPM_ADC("ADC", "HiFi Capture", SSM2602_PWR, 2, 1),
175SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &ssm2602_input_mux_controls),
176SND_SOC_DAPM_PGA("Line Input", SSM2602_PWR, 0, 1, NULL, 0),
177SND_SOC_DAPM_MICBIAS("Mic Bias", SSM2602_PWR, 1, 1),
178SND_SOC_DAPM_INPUT("MICIN"),
179SND_SOC_DAPM_INPUT("RLINEIN"),
180SND_SOC_DAPM_INPUT("LLINEIN"),
181};
182
183static const struct snd_soc_dapm_route audio_conn[] = {
184
185 {"Output Mixer", "Line Bypass Switch", "Line Input"},
186 {"Output Mixer", "HiFi Playback Switch", "DAC"},
187 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
188
189
190 {"RHPOUT", NULL, "Output Mixer"},
191 {"ROUT", NULL, "Output Mixer"},
192 {"LHPOUT", NULL, "Output Mixer"},
193 {"LOUT", NULL, "Output Mixer"},
194
195
196 {"Input Mux", "Line", "Line Input"},
197 {"Input Mux", "Mic", "Mic Bias"},
198 {"ADC", NULL, "Input Mux"},
199
200
201 {"Line Input", NULL, "LLINEIN"},
202 {"Line Input", NULL, "RLINEIN"},
203 {"Mic Bias", NULL, "MICIN"},
204};
205
206static int ssm2602_add_widgets(struct snd_soc_codec *codec)
207{
208 snd_soc_dapm_new_controls(codec, ssm2602_dapm_widgets,
209 ARRAY_SIZE(ssm2602_dapm_widgets));
210
211 snd_soc_dapm_add_routes(codec, audio_conn, ARRAY_SIZE(audio_conn));
212
213 snd_soc_dapm_new_widgets(codec);
214 return 0;
215}
216
217struct _coeff_div {
218 u32 mclk;
219 u32 rate;
220 u16 fs;
221 u8 sr:4;
222 u8 bosr:1;
223 u8 usb:1;
224};
225
226
227static const struct _coeff_div coeff_div[] = {
228
229 {12288000, 48000, 256, 0x0, 0x0, 0x0},
230 {18432000, 48000, 384, 0x0, 0x1, 0x0},
231 {12000000, 48000, 250, 0x0, 0x0, 0x1},
232
233
234 {12288000, 32000, 384, 0x6, 0x0, 0x0},
235 {18432000, 32000, 576, 0x6, 0x1, 0x0},
236 {12000000, 32000, 375, 0x6, 0x0, 0x1},
237
238
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},
244
245
246 {12288000, 96000, 128, 0x7, 0x0, 0x0},
247 {18432000, 96000, 192, 0x7, 0x1, 0x0},
248 {12000000, 96000, 125, 0x7, 0x0, 0x1},
249
250
251 {11289600, 44100, 256, 0x8, 0x0, 0x0},
252 {16934400, 44100, 384, 0x8, 0x1, 0x0},
253 {12000000, 44100, 272, 0x8, 0x1, 0x1},
254
255
256 {11289600, 88200, 128, 0xf, 0x0, 0x0},
257 {16934400, 88200, 192, 0xf, 0x1, 0x0},
258 {12000000, 88200, 136, 0xf, 0x1, 0x1},
259};
260
261static inline int get_coeff(int mclk, int rate)
262{
263 int i;
264
265 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
266 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
267 return i;
268 }
269 return i;
270}
271
272static int ssm2602_hw_params(struct snd_pcm_substream *substream,
273 struct snd_pcm_hw_params *params,
274 struct snd_soc_dai *dai)
275{
276 u16 srate;
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->card->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));
284
285 if (substream == ssm2602->slave_substream) {
286 dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
287 return 0;
288 }
289
290
291 if (i == ARRAY_SIZE(coeff_div))
292 return -EINVAL;
293
294 srate = (coeff_div[i].sr << 2) |
295 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
296
297 ssm2602_write(codec, SSM2602_ACTIVE, 0);
298 ssm2602_write(codec, SSM2602_SRATE, srate);
299
300
301 switch (params_format(params)) {
302 case SNDRV_PCM_FORMAT_S16_LE:
303 break;
304 case SNDRV_PCM_FORMAT_S20_3LE:
305 iface |= 0x0004;
306 break;
307 case SNDRV_PCM_FORMAT_S24_LE:
308 iface |= 0x0008;
309 break;
310 case SNDRV_PCM_FORMAT_S32_LE:
311 iface |= 0x000c;
312 break;
313 }
314 ssm2602_write(codec, SSM2602_IFACE, iface);
315 ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
316 return 0;
317}
318
319static int ssm2602_startup(struct snd_pcm_substream *substream,
320 struct snd_soc_dai *dai)
321{
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->card->codec;
325 struct ssm2602_priv *ssm2602 = codec->private_data;
326 struct i2c_client *i2c = codec->control_data;
327 struct snd_pcm_runtime *master_runtime;
328
329
330
331
332
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);
338
339 if (master_runtime->rate != 0)
340 snd_pcm_hw_constraint_minmax(substream->runtime,
341 SNDRV_PCM_HW_PARAM_RATE,
342 master_runtime->rate,
343 master_runtime->rate);
344
345 if (master_runtime->sample_bits != 0)
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);
350
351 ssm2602->slave_substream = substream;
352 } else
353 ssm2602->master_substream = substream;
354
355 return 0;
356}
357
358static int ssm2602_pcm_prepare(struct snd_pcm_substream *substream,
359 struct snd_soc_dai *dai)
360{
361 struct snd_soc_pcm_runtime *rtd = substream->private_data;
362 struct snd_soc_device *socdev = rtd->socdev;
363 struct snd_soc_codec *codec = socdev->card->codec;
364
365 ssm2602_write(codec, SSM2602_ACTIVE, ACTIVE_ACTIVATE_CODEC);
366
367 return 0;
368}
369
370static void ssm2602_shutdown(struct snd_pcm_substream *substream,
371 struct snd_soc_dai *dai)
372{
373 struct snd_soc_pcm_runtime *rtd = substream->private_data;
374 struct snd_soc_device *socdev = rtd->socdev;
375 struct snd_soc_codec *codec = socdev->card->codec;
376 struct ssm2602_priv *ssm2602 = codec->private_data;
377
378
379 if (!codec->active)
380 ssm2602_write(codec, SSM2602_ACTIVE, 0);
381
382 if (ssm2602->master_substream == substream)
383 ssm2602->master_substream = ssm2602->slave_substream;
384
385 ssm2602->slave_substream = NULL;
386}
387
388static int ssm2602_mute(struct snd_soc_dai *dai, int mute)
389{
390 struct snd_soc_codec *codec = dai->codec;
391 u16 mute_reg = ssm2602_read_reg_cache(codec, SSM2602_APDIGI) & ~APDIGI_ENABLE_DAC_MUTE;
392 if (mute)
393 ssm2602_write(codec, SSM2602_APDIGI,
394 mute_reg | APDIGI_ENABLE_DAC_MUTE);
395 else
396 ssm2602_write(codec, SSM2602_APDIGI, mute_reg);
397 return 0;
398}
399
400static int ssm2602_set_dai_sysclk(struct snd_soc_dai *codec_dai,
401 int clk_id, unsigned int freq, int dir)
402{
403 struct snd_soc_codec *codec = codec_dai->codec;
404 struct ssm2602_priv *ssm2602 = codec->private_data;
405 switch (freq) {
406 case 11289600:
407 case 12000000:
408 case 12288000:
409 case 16934400:
410 case 18432000:
411 ssm2602->sysclk = freq;
412 return 0;
413 }
414 return -EINVAL;
415}
416
417static int ssm2602_set_dai_fmt(struct snd_soc_dai *codec_dai,
418 unsigned int fmt)
419{
420 struct snd_soc_codec *codec = codec_dai->codec;
421 u16 iface = 0;
422
423
424 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
425 case SND_SOC_DAIFMT_CBM_CFM:
426 iface |= 0x0040;
427 break;
428 case SND_SOC_DAIFMT_CBS_CFS:
429 break;
430 default:
431 return -EINVAL;
432 }
433
434
435 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
436 case SND_SOC_DAIFMT_I2S:
437 iface |= 0x0002;
438 break;
439 case SND_SOC_DAIFMT_RIGHT_J:
440 break;
441 case SND_SOC_DAIFMT_LEFT_J:
442 iface |= 0x0001;
443 break;
444 case SND_SOC_DAIFMT_DSP_A:
445 iface |= 0x0013;
446 break;
447 case SND_SOC_DAIFMT_DSP_B:
448 iface |= 0x0003;
449 break;
450 default:
451 return -EINVAL;
452 }
453
454
455 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
456 case SND_SOC_DAIFMT_NB_NF:
457 break;
458 case SND_SOC_DAIFMT_IB_IF:
459 iface |= 0x0090;
460 break;
461 case SND_SOC_DAIFMT_IB_NF:
462 iface |= 0x0080;
463 break;
464 case SND_SOC_DAIFMT_NB_IF:
465 iface |= 0x0010;
466 break;
467 default:
468 return -EINVAL;
469 }
470
471
472 ssm2602_write(codec, SSM2602_IFACE, iface);
473 return 0;
474}
475
476static int ssm2602_set_bias_level(struct snd_soc_codec *codec,
477 enum snd_soc_bias_level level)
478{
479 u16 reg = ssm2602_read_reg_cache(codec, SSM2602_PWR) & 0xff7f;
480
481 switch (level) {
482 case SND_SOC_BIAS_ON:
483
484 ssm2602_write(codec, SSM2602_PWR, reg);
485 break;
486 case SND_SOC_BIAS_PREPARE:
487 break;
488 case SND_SOC_BIAS_STANDBY:
489
490 ssm2602_write(codec, SSM2602_PWR, reg | PWR_CLK_OUT_PDN);
491 break;
492 case SND_SOC_BIAS_OFF:
493
494 ssm2602_write(codec, SSM2602_ACTIVE, 0);
495 ssm2602_write(codec, SSM2602_PWR, 0xffff);
496 break;
497
498 }
499 codec->bias_level = level;
500 return 0;
501}
502
503#define SSM2602_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_32000 |\
504 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
505 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
506
507#define SSM2602_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
508 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
509
510static struct snd_soc_dai_ops ssm2602_dai_ops = {
511 .startup = ssm2602_startup,
512 .prepare = ssm2602_pcm_prepare,
513 .hw_params = ssm2602_hw_params,
514 .shutdown = ssm2602_shutdown,
515 .digital_mute = ssm2602_mute,
516 .set_sysclk = ssm2602_set_dai_sysclk,
517 .set_fmt = ssm2602_set_dai_fmt,
518};
519
520struct snd_soc_dai ssm2602_dai = {
521 .name = "SSM2602",
522 .playback = {
523 .stream_name = "Playback",
524 .channels_min = 2,
525 .channels_max = 2,
526 .rates = SSM2602_RATES,
527 .formats = SSM2602_FORMATS,},
528 .capture = {
529 .stream_name = "Capture",
530 .channels_min = 2,
531 .channels_max = 2,
532 .rates = SSM2602_RATES,
533 .formats = SSM2602_FORMATS,},
534 .ops = &ssm2602_dai_ops,
535};
536EXPORT_SYMBOL_GPL(ssm2602_dai);
537
538static int ssm2602_suspend(struct platform_device *pdev, pm_message_t state)
539{
540 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
541 struct snd_soc_codec *codec = socdev->card->codec;
542
543 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
544 return 0;
545}
546
547static int ssm2602_resume(struct platform_device *pdev)
548{
549 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
550 struct snd_soc_codec *codec = socdev->card->codec;
551 int i;
552 u8 data[2];
553 u16 *cache = codec->reg_cache;
554
555
556 for (i = 0; i < ARRAY_SIZE(ssm2602_reg); i++) {
557 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
558 data[1] = cache[i] & 0x00ff;
559 codec->hw_write(codec->control_data, data, 2);
560 }
561 ssm2602_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
562 ssm2602_set_bias_level(codec, codec->suspend_bias_level);
563 return 0;
564}
565
566
567
568
569
570static int ssm2602_init(struct snd_soc_device *socdev)
571{
572 struct snd_soc_codec *codec = socdev->card->codec;
573 int reg, ret = 0;
574
575 codec->name = "SSM2602";
576 codec->owner = THIS_MODULE;
577 codec->read = ssm2602_read_reg_cache;
578 codec->write = ssm2602_write;
579 codec->set_bias_level = ssm2602_set_bias_level;
580 codec->dai = &ssm2602_dai;
581 codec->num_dai = 1;
582 codec->reg_cache_size = sizeof(ssm2602_reg);
583 codec->reg_cache = kmemdup(ssm2602_reg, sizeof(ssm2602_reg),
584 GFP_KERNEL);
585 if (codec->reg_cache == NULL)
586 return -ENOMEM;
587
588 ssm2602_reset(codec);
589
590
591 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
592 if (ret < 0) {
593 pr_err("ssm2602: failed to create pcms\n");
594 goto pcm_err;
595 }
596
597 ssm2602_write(codec, SSM2602_ACTIVE, 0);
598
599 reg = ssm2602_read_reg_cache(codec, SSM2602_LINVOL);
600 ssm2602_write(codec, SSM2602_LINVOL, reg | LINVOL_LRIN_BOTH);
601 reg = ssm2602_read_reg_cache(codec, SSM2602_RINVOL);
602 ssm2602_write(codec, SSM2602_RINVOL, reg | RINVOL_RLIN_BOTH);
603 reg = ssm2602_read_reg_cache(codec, SSM2602_LOUT1V);
604 ssm2602_write(codec, SSM2602_LOUT1V, reg | LOUT1V_LRHP_BOTH);
605 reg = ssm2602_read_reg_cache(codec, SSM2602_ROUT1V);
606 ssm2602_write(codec, SSM2602_ROUT1V, reg | ROUT1V_RLHP_BOTH);
607
608 ssm2602_write(codec, SSM2602_APANA,
609 APANA_ENABLE_MIC_BOOST2 | APANA_SELECT_DAC |
610 APANA_ENABLE_MIC_BOOST);
611 ssm2602_write(codec, SSM2602_PWR, 0);
612
613 snd_soc_add_controls(codec, ssm2602_snd_controls,
614 ARRAY_SIZE(ssm2602_snd_controls));
615 ssm2602_add_widgets(codec);
616 ret = snd_soc_init_card(socdev);
617 if (ret < 0) {
618 pr_err("ssm2602: failed to register card\n");
619 goto card_err;
620 }
621
622 return ret;
623
624card_err:
625 snd_soc_free_pcms(socdev);
626 snd_soc_dapm_free(socdev);
627pcm_err:
628 kfree(codec->reg_cache);
629 return ret;
630}
631
632static struct snd_soc_device *ssm2602_socdev;
633
634#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
635
636
637
638
639
640
641static int ssm2602_i2c_probe(struct i2c_client *i2c,
642 const struct i2c_device_id *id)
643{
644 struct snd_soc_device *socdev = ssm2602_socdev;
645 struct snd_soc_codec *codec = socdev->card->codec;
646 int ret;
647
648 i2c_set_clientdata(i2c, codec);
649 codec->control_data = i2c;
650
651 ret = ssm2602_init(socdev);
652 if (ret < 0)
653 pr_err("failed to initialise SSM2602\n");
654
655 return ret;
656}
657
658static int ssm2602_i2c_remove(struct i2c_client *client)
659{
660 struct snd_soc_codec *codec = i2c_get_clientdata(client);
661 kfree(codec->reg_cache);
662 return 0;
663}
664
665static const struct i2c_device_id ssm2602_i2c_id[] = {
666 { "ssm2602", 0 },
667 { }
668};
669MODULE_DEVICE_TABLE(i2c, ssm2602_i2c_id);
670
671static struct i2c_driver ssm2602_i2c_driver = {
672 .driver = {
673 .name = "SSM2602 I2C Codec",
674 .owner = THIS_MODULE,
675 },
676 .probe = ssm2602_i2c_probe,
677 .remove = ssm2602_i2c_remove,
678 .id_table = ssm2602_i2c_id,
679};
680
681static int ssm2602_add_i2c_device(struct platform_device *pdev,
682 const struct ssm2602_setup_data *setup)
683{
684 struct i2c_board_info info;
685 struct i2c_adapter *adapter;
686 struct i2c_client *client;
687 int ret;
688
689 ret = i2c_add_driver(&ssm2602_i2c_driver);
690 if (ret != 0) {
691 dev_err(&pdev->dev, "can't add i2c driver\n");
692 return ret;
693 }
694 memset(&info, 0, sizeof(struct i2c_board_info));
695 info.addr = setup->i2c_address;
696 strlcpy(info.type, "ssm2602", I2C_NAME_SIZE);
697 adapter = i2c_get_adapter(setup->i2c_bus);
698 if (!adapter) {
699 dev_err(&pdev->dev, "can't get i2c adapter %d\n",
700 setup->i2c_bus);
701 goto err_driver;
702 }
703 client = i2c_new_device(adapter, &info);
704 i2c_put_adapter(adapter);
705 if (!client) {
706 dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
707 (unsigned int)info.addr);
708 goto err_driver;
709 }
710 return 0;
711err_driver:
712 i2c_del_driver(&ssm2602_i2c_driver);
713 return -ENODEV;
714}
715#endif
716
717static int ssm2602_probe(struct platform_device *pdev)
718{
719 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
720 struct ssm2602_setup_data *setup;
721 struct snd_soc_codec *codec;
722 struct ssm2602_priv *ssm2602;
723 int ret = 0;
724
725 pr_info("ssm2602 Audio Codec %s", SSM2602_VERSION);
726
727 setup = socdev->codec_data;
728 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
729 if (codec == NULL)
730 return -ENOMEM;
731
732 ssm2602 = kzalloc(sizeof(struct ssm2602_priv), GFP_KERNEL);
733 if (ssm2602 == NULL) {
734 kfree(codec);
735 return -ENOMEM;
736 }
737
738 codec->private_data = ssm2602;
739 socdev->card->codec = codec;
740 mutex_init(&codec->mutex);
741 INIT_LIST_HEAD(&codec->dapm_widgets);
742 INIT_LIST_HEAD(&codec->dapm_paths);
743
744 ssm2602_socdev = socdev;
745#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
746 if (setup->i2c_address) {
747 codec->hw_write = (hw_write_t)i2c_master_send;
748 ret = ssm2602_add_i2c_device(pdev, setup);
749 }
750#else
751
752#endif
753 return ret;
754}
755
756
757static int ssm2602_remove(struct platform_device *pdev)
758{
759 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
760 struct snd_soc_codec *codec = socdev->card->codec;
761
762 if (codec->control_data)
763 ssm2602_set_bias_level(codec, SND_SOC_BIAS_OFF);
764
765 snd_soc_free_pcms(socdev);
766 snd_soc_dapm_free(socdev);
767#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
768 i2c_unregister_device(codec->control_data);
769 i2c_del_driver(&ssm2602_i2c_driver);
770#endif
771 kfree(codec->private_data);
772 kfree(codec);
773
774 return 0;
775}
776
777struct snd_soc_codec_device soc_codec_dev_ssm2602 = {
778 .probe = ssm2602_probe,
779 .remove = ssm2602_remove,
780 .suspend = ssm2602_suspend,
781 .resume = ssm2602_resume,
782};
783EXPORT_SYMBOL_GPL(soc_codec_dev_ssm2602);
784
785static int __init ssm2602_modinit(void)
786{
787 return snd_soc_register_dai(&ssm2602_dai);
788}
789module_init(ssm2602_modinit);
790
791static void __exit ssm2602_exit(void)
792{
793 snd_soc_unregister_dai(&ssm2602_dai);
794}
795module_exit(ssm2602_exit);
796
797MODULE_DESCRIPTION("ASoC ssm2602 driver");
798MODULE_AUTHOR("Cliff Cai");
799MODULE_LICENSE("GPL");
800
