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1dcf98ff MB |
1 | /* |
2 | * wm8523.c -- WM8523 ALSA SoC Audio driver | |
3 | * | |
4 | * Copyright 2009 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/pm.h> | |
19 | #include <linux/i2c.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/regulator/consumer.h> | |
22 | #include <sound/core.h> | |
23 | #include <sound/pcm.h> | |
24 | #include <sound/pcm_params.h> | |
25 | #include <sound/soc.h> | |
26 | #include <sound/soc-dapm.h> | |
27 | #include <sound/initval.h> | |
28 | #include <sound/tlv.h> | |
29 | ||
30 | #include "wm8523.h" | |
31 | ||
32 | static struct snd_soc_codec *wm8523_codec; | |
33 | struct snd_soc_codec_device soc_codec_dev_wm8523; | |
34 | ||
35 | #define WM8523_NUM_SUPPLIES 2 | |
36 | static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = { | |
37 | "AVDD", | |
38 | "LINEVDD", | |
39 | }; | |
40 | ||
41 | #define WM8523_NUM_RATES 7 | |
42 | ||
43 | /* codec private data */ | |
44 | struct wm8523_priv { | |
45 | struct snd_soc_codec codec; | |
46 | u16 reg_cache[WM8523_REGISTER_COUNT]; | |
47 | struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES]; | |
48 | unsigned int sysclk; | |
49 | unsigned int rate_constraint_list[WM8523_NUM_RATES]; | |
50 | struct snd_pcm_hw_constraint_list rate_constraint; | |
51 | }; | |
52 | ||
53 | static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = { | |
54 | 0x8523, /* R0 - DEVICE_ID */ | |
55 | 0x0001, /* R1 - REVISION */ | |
56 | 0x0000, /* R2 - PSCTRL1 */ | |
57 | 0x1812, /* R3 - AIF_CTRL1 */ | |
58 | 0x0000, /* R4 - AIF_CTRL2 */ | |
59 | 0x0001, /* R5 - DAC_CTRL3 */ | |
60 | 0x0190, /* R6 - DAC_GAINL */ | |
61 | 0x0190, /* R7 - DAC_GAINR */ | |
62 | 0x0000, /* R8 - ZERO_DETECT */ | |
63 | }; | |
64 | ||
8d50e447 | 65 | static int wm8523_volatile_register(unsigned int reg) |
1dcf98ff MB |
66 | { |
67 | switch (reg) { | |
68 | case WM8523_DEVICE_ID: | |
69 | case WM8523_REVISION: | |
70 | return 1; | |
71 | default: | |
72 | return 0; | |
73 | } | |
74 | } | |
75 | ||
1dcf98ff MB |
76 | static int wm8523_reset(struct snd_soc_codec *codec) |
77 | { | |
8d50e447 | 78 | return snd_soc_write(codec, WM8523_DEVICE_ID, 0); |
1dcf98ff MB |
79 | } |
80 | ||
81 | static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0); | |
82 | ||
83 | static const char *wm8523_zd_count_text[] = { | |
84 | "1024", | |
85 | "2048", | |
86 | }; | |
87 | ||
88 | static const struct soc_enum wm8523_zc_count = | |
89 | SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text); | |
90 | ||
91 | static const struct snd_kcontrol_new wm8523_snd_controls[] = { | |
92 | SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR, | |
93 | 0, 448, 0, dac_tlv), | |
94 | SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0), | |
95 | SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0), | |
96 | SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1), | |
97 | SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0), | |
98 | SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0), | |
99 | SOC_ENUM("Zero Detect Count", wm8523_zc_count), | |
100 | }; | |
101 | ||
102 | static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = { | |
103 | SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), | |
104 | SND_SOC_DAPM_OUTPUT("LINEVOUTL"), | |
105 | SND_SOC_DAPM_OUTPUT("LINEVOUTR"), | |
106 | }; | |
107 | ||
108 | static const struct snd_soc_dapm_route intercon[] = { | |
109 | { "LINEVOUTL", NULL, "DAC" }, | |
110 | { "LINEVOUTR", NULL, "DAC" }, | |
111 | }; | |
112 | ||
113 | static int wm8523_add_widgets(struct snd_soc_codec *codec) | |
114 | { | |
115 | snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets, | |
116 | ARRAY_SIZE(wm8523_dapm_widgets)); | |
117 | ||
118 | snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); | |
119 | ||
1dcf98ff MB |
120 | return 0; |
121 | } | |
122 | ||
123 | static struct { | |
124 | int value; | |
125 | int ratio; | |
126 | } lrclk_ratios[WM8523_NUM_RATES] = { | |
127 | { 1, 128 }, | |
128 | { 2, 192 }, | |
129 | { 3, 256 }, | |
130 | { 4, 384 }, | |
131 | { 5, 512 }, | |
132 | { 6, 768 }, | |
133 | { 7, 1152 }, | |
134 | }; | |
135 | ||
136 | static int wm8523_startup(struct snd_pcm_substream *substream, | |
137 | struct snd_soc_dai *dai) | |
138 | { | |
139 | struct snd_soc_codec *codec = dai->codec; | |
140 | struct wm8523_priv *wm8523 = codec->private_data; | |
141 | ||
142 | /* The set of sample rates that can be supported depends on the | |
143 | * MCLK supplied to the CODEC - enforce this. | |
144 | */ | |
145 | if (!wm8523->sysclk) { | |
146 | dev_err(codec->dev, | |
147 | "No MCLK configured, call set_sysclk() on init\n"); | |
148 | return -EINVAL; | |
149 | } | |
150 | ||
151 | return 0; | |
152 | snd_pcm_hw_constraint_list(substream->runtime, 0, | |
153 | SNDRV_PCM_HW_PARAM_RATE, | |
154 | &wm8523->rate_constraint); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static int wm8523_hw_params(struct snd_pcm_substream *substream, | |
160 | struct snd_pcm_hw_params *params, | |
161 | struct snd_soc_dai *dai) | |
162 | { | |
163 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
164 | struct snd_soc_device *socdev = rtd->socdev; | |
165 | struct snd_soc_codec *codec = socdev->card->codec; | |
166 | struct wm8523_priv *wm8523 = codec->private_data; | |
167 | int i; | |
8d50e447 MB |
168 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
169 | u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2); | |
1dcf98ff MB |
170 | |
171 | /* Find a supported LRCLK ratio */ | |
172 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
173 | if (wm8523->sysclk / params_rate(params) == | |
174 | lrclk_ratios[i].ratio) | |
175 | break; | |
176 | } | |
177 | ||
178 | /* Should never happen, should be handled by constraints */ | |
179 | if (i == ARRAY_SIZE(lrclk_ratios)) { | |
180 | dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", | |
181 | wm8523->sysclk / params_rate(params)); | |
182 | return -EINVAL; | |
183 | } | |
184 | ||
185 | aifctrl2 &= ~WM8523_SR_MASK; | |
186 | aifctrl2 |= lrclk_ratios[i].value; | |
187 | ||
188 | aifctrl1 &= ~WM8523_WL_MASK; | |
189 | switch (params_format(params)) { | |
190 | case SNDRV_PCM_FORMAT_S16_LE: | |
191 | break; | |
192 | case SNDRV_PCM_FORMAT_S20_3LE: | |
193 | aifctrl1 |= 0x8; | |
194 | break; | |
195 | case SNDRV_PCM_FORMAT_S24_LE: | |
196 | aifctrl1 |= 0x10; | |
197 | break; | |
198 | case SNDRV_PCM_FORMAT_S32_LE: | |
199 | aifctrl1 |= 0x18; | |
200 | break; | |
201 | } | |
202 | ||
8d50e447 MB |
203 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
204 | snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2); | |
1dcf98ff MB |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
210 | int clk_id, unsigned int freq, int dir) | |
211 | { | |
212 | struct snd_soc_codec *codec = codec_dai->codec; | |
213 | struct wm8523_priv *wm8523 = codec->private_data; | |
214 | unsigned int val; | |
215 | int i; | |
216 | ||
217 | wm8523->sysclk = freq; | |
218 | ||
219 | wm8523->rate_constraint.count = 0; | |
220 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
221 | val = freq / lrclk_ratios[i].ratio; | |
222 | /* Check that it's a standard rate since core can't | |
223 | * cope with others and having the odd rates confuses | |
224 | * constraint matching. | |
225 | */ | |
226 | switch (val) { | |
227 | case 8000: | |
228 | case 11025: | |
229 | case 16000: | |
230 | case 22050: | |
231 | case 32000: | |
232 | case 44100: | |
233 | case 48000: | |
234 | case 64000: | |
235 | case 88200: | |
236 | case 96000: | |
237 | case 176400: | |
238 | case 192000: | |
239 | dev_dbg(codec->dev, "Supported sample rate: %dHz\n", | |
240 | val); | |
241 | wm8523->rate_constraint_list[i] = val; | |
242 | wm8523->rate_constraint.count++; | |
243 | break; | |
244 | default: | |
245 | dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", | |
246 | val); | |
247 | } | |
248 | } | |
249 | ||
250 | /* Need at least one supported rate... */ | |
251 | if (wm8523->rate_constraint.count == 0) | |
252 | return -EINVAL; | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | ||
258 | static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
259 | unsigned int fmt) | |
260 | { | |
261 | struct snd_soc_codec *codec = codec_dai->codec; | |
8d50e447 | 262 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
1dcf98ff MB |
263 | |
264 | aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK | | |
265 | WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK); | |
266 | ||
267 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
268 | case SND_SOC_DAIFMT_CBM_CFM: | |
269 | aifctrl1 |= WM8523_AIF_MSTR; | |
270 | break; | |
271 | case SND_SOC_DAIFMT_CBS_CFS: | |
272 | break; | |
273 | default: | |
274 | return -EINVAL; | |
275 | } | |
276 | ||
277 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
278 | case SND_SOC_DAIFMT_I2S: | |
279 | aifctrl1 |= 0x0002; | |
280 | break; | |
281 | case SND_SOC_DAIFMT_RIGHT_J: | |
282 | break; | |
283 | case SND_SOC_DAIFMT_LEFT_J: | |
284 | aifctrl1 |= 0x0001; | |
285 | break; | |
286 | case SND_SOC_DAIFMT_DSP_A: | |
287 | aifctrl1 |= 0x0003; | |
288 | break; | |
289 | case SND_SOC_DAIFMT_DSP_B: | |
290 | aifctrl1 |= 0x0023; | |
291 | break; | |
292 | default: | |
293 | return -EINVAL; | |
294 | } | |
295 | ||
296 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
297 | case SND_SOC_DAIFMT_NB_NF: | |
298 | break; | |
299 | case SND_SOC_DAIFMT_IB_IF: | |
300 | aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV; | |
301 | break; | |
302 | case SND_SOC_DAIFMT_IB_NF: | |
303 | aifctrl1 |= WM8523_BCLK_INV; | |
304 | break; | |
305 | case SND_SOC_DAIFMT_NB_IF: | |
306 | aifctrl1 |= WM8523_LRCLK_INV; | |
307 | break; | |
308 | default: | |
309 | return -EINVAL; | |
310 | } | |
311 | ||
8d50e447 | 312 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
1dcf98ff MB |
313 | |
314 | return 0; | |
315 | } | |
316 | ||
317 | static int wm8523_set_bias_level(struct snd_soc_codec *codec, | |
318 | enum snd_soc_bias_level level) | |
319 | { | |
320 | struct wm8523_priv *wm8523 = codec->private_data; | |
321 | int ret, i; | |
322 | ||
323 | switch (level) { | |
324 | case SND_SOC_BIAS_ON: | |
325 | break; | |
326 | ||
327 | case SND_SOC_BIAS_PREPARE: | |
328 | /* Full power on */ | |
329 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
330 | WM8523_SYS_ENA_MASK, 3); | |
331 | break; | |
332 | ||
333 | case SND_SOC_BIAS_STANDBY: | |
334 | if (codec->bias_level == SND_SOC_BIAS_OFF) { | |
335 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), | |
336 | wm8523->supplies); | |
337 | if (ret != 0) { | |
338 | dev_err(codec->dev, | |
339 | "Failed to enable supplies: %d\n", | |
340 | ret); | |
341 | return ret; | |
342 | } | |
343 | ||
344 | /* Initial power up */ | |
345 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
346 | WM8523_SYS_ENA_MASK, 1); | |
347 | ||
348 | /* Sync back default/cached values */ | |
349 | for (i = WM8523_AIF_CTRL1; | |
350 | i < WM8523_MAX_REGISTER; i++) | |
8d50e447 | 351 | snd_soc_write(codec, i, wm8523->reg_cache[i]); |
1dcf98ff MB |
352 | |
353 | ||
354 | msleep(100); | |
355 | } | |
356 | ||
357 | /* Power up to mute */ | |
358 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
359 | WM8523_SYS_ENA_MASK, 2); | |
360 | ||
361 | break; | |
362 | ||
363 | case SND_SOC_BIAS_OFF: | |
364 | /* The chip runs through the power down sequence for us. */ | |
365 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
366 | WM8523_SYS_ENA_MASK, 0); | |
367 | msleep(100); | |
368 | ||
369 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), | |
370 | wm8523->supplies); | |
371 | break; | |
372 | } | |
373 | codec->bias_level = level; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | #define WM8523_RATES SNDRV_PCM_RATE_8000_192000 | |
378 | ||
379 | #define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
380 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) | |
381 | ||
382 | static struct snd_soc_dai_ops wm8523_dai_ops = { | |
383 | .startup = wm8523_startup, | |
384 | .hw_params = wm8523_hw_params, | |
385 | .set_sysclk = wm8523_set_dai_sysclk, | |
386 | .set_fmt = wm8523_set_dai_fmt, | |
387 | }; | |
388 | ||
389 | struct snd_soc_dai wm8523_dai = { | |
390 | .name = "WM8523", | |
391 | .playback = { | |
392 | .stream_name = "Playback", | |
393 | .channels_min = 2, /* Mono modes not yet supported */ | |
394 | .channels_max = 2, | |
395 | .rates = WM8523_RATES, | |
396 | .formats = WM8523_FORMATS, | |
397 | }, | |
398 | .ops = &wm8523_dai_ops, | |
399 | }; | |
400 | EXPORT_SYMBOL_GPL(wm8523_dai); | |
401 | ||
402 | #ifdef CONFIG_PM | |
403 | static int wm8523_suspend(struct platform_device *pdev, pm_message_t state) | |
404 | { | |
405 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
406 | struct snd_soc_codec *codec = socdev->card->codec; | |
407 | ||
408 | wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
409 | return 0; | |
410 | } | |
411 | ||
412 | static int wm8523_resume(struct platform_device *pdev) | |
413 | { | |
414 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
415 | struct snd_soc_codec *codec = socdev->card->codec; | |
416 | ||
417 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
418 | ||
419 | return 0; | |
420 | } | |
421 | #else | |
422 | #define wm8523_suspend NULL | |
423 | #define wm8523_resume NULL | |
424 | #endif | |
425 | ||
426 | static int wm8523_probe(struct platform_device *pdev) | |
427 | { | |
428 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
429 | struct snd_soc_codec *codec; | |
430 | int ret = 0; | |
431 | ||
432 | if (wm8523_codec == NULL) { | |
433 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
434 | return -ENODEV; | |
435 | } | |
436 | ||
437 | socdev->card->codec = wm8523_codec; | |
438 | codec = wm8523_codec; | |
439 | ||
440 | /* register pcms */ | |
441 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
442 | if (ret < 0) { | |
443 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
444 | goto pcm_err; | |
445 | } | |
446 | ||
447 | snd_soc_add_controls(codec, wm8523_snd_controls, | |
448 | ARRAY_SIZE(wm8523_snd_controls)); | |
449 | wm8523_add_widgets(codec); | |
1dcf98ff MB |
450 | |
451 | return ret; | |
452 | ||
1dcf98ff MB |
453 | pcm_err: |
454 | return ret; | |
455 | } | |
456 | ||
457 | static int wm8523_remove(struct platform_device *pdev) | |
458 | { | |
459 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
460 | ||
461 | snd_soc_free_pcms(socdev); | |
462 | snd_soc_dapm_free(socdev); | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | struct snd_soc_codec_device soc_codec_dev_wm8523 = { | |
468 | .probe = wm8523_probe, | |
469 | .remove = wm8523_remove, | |
470 | .suspend = wm8523_suspend, | |
471 | .resume = wm8523_resume, | |
472 | }; | |
473 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8523); | |
474 | ||
8d50e447 MB |
475 | static int wm8523_register(struct wm8523_priv *wm8523, |
476 | enum snd_soc_control_type control) | |
1dcf98ff MB |
477 | { |
478 | int ret; | |
479 | struct snd_soc_codec *codec = &wm8523->codec; | |
480 | int i; | |
481 | ||
482 | if (wm8523_codec) { | |
483 | dev_err(codec->dev, "Another WM8523 is registered\n"); | |
484 | return -EINVAL; | |
485 | } | |
486 | ||
487 | mutex_init(&codec->mutex); | |
488 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
489 | INIT_LIST_HEAD(&codec->dapm_paths); | |
490 | ||
491 | codec->private_data = wm8523; | |
492 | codec->name = "WM8523"; | |
493 | codec->owner = THIS_MODULE; | |
1dcf98ff MB |
494 | codec->bias_level = SND_SOC_BIAS_OFF; |
495 | codec->set_bias_level = wm8523_set_bias_level; | |
496 | codec->dai = &wm8523_dai; | |
497 | codec->num_dai = 1; | |
498 | codec->reg_cache_size = WM8523_REGISTER_COUNT; | |
499 | codec->reg_cache = &wm8523->reg_cache; | |
8d50e447 | 500 | codec->volatile_register = wm8523_volatile_register; |
1dcf98ff MB |
501 | |
502 | wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0]; | |
503 | wm8523->rate_constraint.count = | |
504 | ARRAY_SIZE(wm8523->rate_constraint_list); | |
505 | ||
506 | memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg)); | |
507 | ||
8d50e447 MB |
508 | ret = snd_soc_codec_set_cache_io(codec, 8, 16, control); |
509 | if (ret != 0) { | |
510 | dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); | |
511 | goto err; | |
512 | } | |
513 | ||
1dcf98ff MB |
514 | for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++) |
515 | wm8523->supplies[i].supply = wm8523_supply_names[i]; | |
516 | ||
517 | ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies), | |
518 | wm8523->supplies); | |
519 | if (ret != 0) { | |
520 | dev_err(codec->dev, "Failed to request supplies: %d\n", ret); | |
521 | goto err; | |
522 | } | |
523 | ||
524 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), | |
525 | wm8523->supplies); | |
526 | if (ret != 0) { | |
527 | dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); | |
528 | goto err_get; | |
529 | } | |
530 | ||
8d50e447 | 531 | ret = snd_soc_read(codec, WM8523_DEVICE_ID); |
1dcf98ff MB |
532 | if (ret < 0) { |
533 | dev_err(codec->dev, "Failed to read ID register\n"); | |
534 | goto err_enable; | |
535 | } | |
536 | if (ret != wm8523_reg[WM8523_DEVICE_ID]) { | |
537 | dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret); | |
538 | ret = -EINVAL; | |
539 | goto err_enable; | |
540 | } | |
541 | ||
8d50e447 | 542 | ret = snd_soc_read(codec, WM8523_REVISION); |
1dcf98ff MB |
543 | if (ret < 0) { |
544 | dev_err(codec->dev, "Failed to read revision register\n"); | |
545 | goto err_enable; | |
546 | } | |
547 | dev_info(codec->dev, "revision %c\n", | |
548 | (ret & WM8523_CHIP_REV_MASK) + 'A'); | |
549 | ||
550 | ret = wm8523_reset(codec); | |
551 | if (ret < 0) { | |
552 | dev_err(codec->dev, "Failed to issue reset\n"); | |
553 | goto err_enable; | |
554 | } | |
555 | ||
556 | wm8523_dai.dev = codec->dev; | |
557 | ||
558 | /* Change some default settings - latch VU and enable ZC */ | |
559 | wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU; | |
560 | wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC; | |
561 | ||
562 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
563 | ||
564 | /* Bias level configuration will have done an extra enable */ | |
565 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
566 | ||
567 | wm8523_codec = codec; | |
568 | ||
569 | ret = snd_soc_register_codec(codec); | |
570 | if (ret != 0) { | |
571 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | ret = snd_soc_register_dai(&wm8523_dai); | |
576 | if (ret != 0) { | |
577 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
578 | snd_soc_unregister_codec(codec); | |
579 | return ret; | |
580 | } | |
581 | ||
582 | return 0; | |
583 | ||
584 | err_enable: | |
585 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
586 | err_get: | |
587 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
588 | err: | |
589 | kfree(wm8523); | |
590 | return ret; | |
591 | } | |
592 | ||
593 | static void wm8523_unregister(struct wm8523_priv *wm8523) | |
594 | { | |
595 | wm8523_set_bias_level(&wm8523->codec, SND_SOC_BIAS_OFF); | |
596 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
597 | snd_soc_unregister_dai(&wm8523_dai); | |
598 | snd_soc_unregister_codec(&wm8523->codec); | |
599 | kfree(wm8523); | |
600 | wm8523_codec = NULL; | |
601 | } | |
602 | ||
603 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
604 | static __devinit int wm8523_i2c_probe(struct i2c_client *i2c, | |
605 | const struct i2c_device_id *id) | |
606 | { | |
607 | struct wm8523_priv *wm8523; | |
608 | struct snd_soc_codec *codec; | |
609 | ||
610 | wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL); | |
611 | if (wm8523 == NULL) | |
612 | return -ENOMEM; | |
613 | ||
614 | codec = &wm8523->codec; | |
615 | codec->hw_write = (hw_write_t)i2c_master_send; | |
616 | ||
617 | i2c_set_clientdata(i2c, wm8523); | |
618 | codec->control_data = i2c; | |
619 | ||
620 | codec->dev = &i2c->dev; | |
621 | ||
8d50e447 | 622 | return wm8523_register(wm8523, SND_SOC_I2C); |
1dcf98ff MB |
623 | } |
624 | ||
625 | static __devexit int wm8523_i2c_remove(struct i2c_client *client) | |
626 | { | |
627 | struct wm8523_priv *wm8523 = i2c_get_clientdata(client); | |
628 | wm8523_unregister(wm8523); | |
629 | return 0; | |
630 | } | |
631 | ||
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632 | static const struct i2c_device_id wm8523_i2c_id[] = { |
633 | { "wm8523", 0 }, | |
634 | { } | |
635 | }; | |
636 | MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id); | |
637 | ||
638 | static struct i2c_driver wm8523_i2c_driver = { | |
639 | .driver = { | |
640 | .name = "WM8523", | |
641 | .owner = THIS_MODULE, | |
642 | }, | |
643 | .probe = wm8523_i2c_probe, | |
644 | .remove = __devexit_p(wm8523_i2c_remove), | |
1dcf98ff MB |
645 | .id_table = wm8523_i2c_id, |
646 | }; | |
647 | #endif | |
648 | ||
649 | static int __init wm8523_modinit(void) | |
650 | { | |
651 | int ret; | |
652 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
653 | ret = i2c_add_driver(&wm8523_i2c_driver); | |
654 | if (ret != 0) { | |
655 | printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n", | |
656 | ret); | |
657 | } | |
658 | #endif | |
659 | return 0; | |
660 | } | |
661 | module_init(wm8523_modinit); | |
662 | ||
663 | static void __exit wm8523_exit(void) | |
664 | { | |
665 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
666 | i2c_del_driver(&wm8523_i2c_driver); | |
667 | #endif | |
668 | } | |
669 | module_exit(wm8523_exit); | |
670 | ||
671 | MODULE_DESCRIPTION("ASoC WM8523 driver"); | |
672 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
673 | MODULE_LICENSE("GPL"); |