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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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
1dcf98ff MB |
23 | #include <sound/core.h> |
24 | #include <sound/pcm.h> | |
25 | #include <sound/pcm_params.h> | |
26 | #include <sound/soc.h> | |
27 | #include <sound/soc-dapm.h> | |
28 | #include <sound/initval.h> | |
29 | #include <sound/tlv.h> | |
30 | ||
31 | #include "wm8523.h" | |
32 | ||
33 | static struct snd_soc_codec *wm8523_codec; | |
34 | struct snd_soc_codec_device soc_codec_dev_wm8523; | |
35 | ||
36 | #define WM8523_NUM_SUPPLIES 2 | |
37 | static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = { | |
38 | "AVDD", | |
39 | "LINEVDD", | |
40 | }; | |
41 | ||
42 | #define WM8523_NUM_RATES 7 | |
43 | ||
44 | /* codec private data */ | |
45 | struct wm8523_priv { | |
46 | struct snd_soc_codec codec; | |
47 | u16 reg_cache[WM8523_REGISTER_COUNT]; | |
48 | struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES]; | |
49 | unsigned int sysclk; | |
50 | unsigned int rate_constraint_list[WM8523_NUM_RATES]; | |
51 | struct snd_pcm_hw_constraint_list rate_constraint; | |
52 | }; | |
53 | ||
54 | static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = { | |
55 | 0x8523, /* R0 - DEVICE_ID */ | |
56 | 0x0001, /* R1 - REVISION */ | |
57 | 0x0000, /* R2 - PSCTRL1 */ | |
58 | 0x1812, /* R3 - AIF_CTRL1 */ | |
59 | 0x0000, /* R4 - AIF_CTRL2 */ | |
60 | 0x0001, /* R5 - DAC_CTRL3 */ | |
61 | 0x0190, /* R6 - DAC_GAINL */ | |
62 | 0x0190, /* R7 - DAC_GAINR */ | |
63 | 0x0000, /* R8 - ZERO_DETECT */ | |
64 | }; | |
65 | ||
8d50e447 | 66 | static int wm8523_volatile_register(unsigned int reg) |
1dcf98ff MB |
67 | { |
68 | switch (reg) { | |
69 | case WM8523_DEVICE_ID: | |
70 | case WM8523_REVISION: | |
71 | return 1; | |
72 | default: | |
73 | return 0; | |
74 | } | |
75 | } | |
76 | ||
1dcf98ff MB |
77 | static int wm8523_reset(struct snd_soc_codec *codec) |
78 | { | |
8d50e447 | 79 | return snd_soc_write(codec, WM8523_DEVICE_ID, 0); |
1dcf98ff MB |
80 | } |
81 | ||
82 | static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0); | |
83 | ||
84 | static const char *wm8523_zd_count_text[] = { | |
85 | "1024", | |
86 | "2048", | |
87 | }; | |
88 | ||
89 | static const struct soc_enum wm8523_zc_count = | |
90 | SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text); | |
91 | ||
92 | static const struct snd_kcontrol_new wm8523_snd_controls[] = { | |
93 | SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR, | |
94 | 0, 448, 0, dac_tlv), | |
95 | SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0), | |
96 | SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0), | |
97 | SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1), | |
98 | SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0), | |
99 | SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0), | |
100 | SOC_ENUM("Zero Detect Count", wm8523_zc_count), | |
101 | }; | |
102 | ||
103 | static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = { | |
104 | SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), | |
105 | SND_SOC_DAPM_OUTPUT("LINEVOUTL"), | |
106 | SND_SOC_DAPM_OUTPUT("LINEVOUTR"), | |
107 | }; | |
108 | ||
109 | static const struct snd_soc_dapm_route intercon[] = { | |
110 | { "LINEVOUTL", NULL, "DAC" }, | |
111 | { "LINEVOUTR", NULL, "DAC" }, | |
112 | }; | |
113 | ||
114 | static int wm8523_add_widgets(struct snd_soc_codec *codec) | |
115 | { | |
116 | snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets, | |
117 | ARRAY_SIZE(wm8523_dapm_widgets)); | |
118 | ||
119 | snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); | |
120 | ||
1dcf98ff MB |
121 | return 0; |
122 | } | |
123 | ||
124 | static struct { | |
125 | int value; | |
126 | int ratio; | |
127 | } lrclk_ratios[WM8523_NUM_RATES] = { | |
128 | { 1, 128 }, | |
129 | { 2, 192 }, | |
130 | { 3, 256 }, | |
131 | { 4, 384 }, | |
132 | { 5, 512 }, | |
133 | { 6, 768 }, | |
134 | { 7, 1152 }, | |
135 | }; | |
136 | ||
137 | static int wm8523_startup(struct snd_pcm_substream *substream, | |
138 | struct snd_soc_dai *dai) | |
139 | { | |
140 | struct snd_soc_codec *codec = dai->codec; | |
141 | struct wm8523_priv *wm8523 = codec->private_data; | |
142 | ||
143 | /* The set of sample rates that can be supported depends on the | |
144 | * MCLK supplied to the CODEC - enforce this. | |
145 | */ | |
146 | if (!wm8523->sysclk) { | |
147 | dev_err(codec->dev, | |
148 | "No MCLK configured, call set_sysclk() on init\n"); | |
149 | return -EINVAL; | |
150 | } | |
151 | ||
152 | return 0; | |
153 | snd_pcm_hw_constraint_list(substream->runtime, 0, | |
154 | SNDRV_PCM_HW_PARAM_RATE, | |
155 | &wm8523->rate_constraint); | |
156 | ||
157 | return 0; | |
158 | } | |
159 | ||
160 | static int wm8523_hw_params(struct snd_pcm_substream *substream, | |
161 | struct snd_pcm_hw_params *params, | |
162 | struct snd_soc_dai *dai) | |
163 | { | |
164 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
165 | struct snd_soc_device *socdev = rtd->socdev; | |
166 | struct snd_soc_codec *codec = socdev->card->codec; | |
167 | struct wm8523_priv *wm8523 = codec->private_data; | |
168 | int i; | |
8d50e447 MB |
169 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
170 | u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2); | |
1dcf98ff MB |
171 | |
172 | /* Find a supported LRCLK ratio */ | |
173 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
174 | if (wm8523->sysclk / params_rate(params) == | |
175 | lrclk_ratios[i].ratio) | |
176 | break; | |
177 | } | |
178 | ||
179 | /* Should never happen, should be handled by constraints */ | |
180 | if (i == ARRAY_SIZE(lrclk_ratios)) { | |
181 | dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", | |
182 | wm8523->sysclk / params_rate(params)); | |
183 | return -EINVAL; | |
184 | } | |
185 | ||
186 | aifctrl2 &= ~WM8523_SR_MASK; | |
187 | aifctrl2 |= lrclk_ratios[i].value; | |
188 | ||
189 | aifctrl1 &= ~WM8523_WL_MASK; | |
190 | switch (params_format(params)) { | |
191 | case SNDRV_PCM_FORMAT_S16_LE: | |
192 | break; | |
193 | case SNDRV_PCM_FORMAT_S20_3LE: | |
194 | aifctrl1 |= 0x8; | |
195 | break; | |
196 | case SNDRV_PCM_FORMAT_S24_LE: | |
197 | aifctrl1 |= 0x10; | |
198 | break; | |
199 | case SNDRV_PCM_FORMAT_S32_LE: | |
200 | aifctrl1 |= 0x18; | |
201 | break; | |
202 | } | |
203 | ||
8d50e447 MB |
204 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
205 | snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2); | |
1dcf98ff MB |
206 | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
211 | int clk_id, unsigned int freq, int dir) | |
212 | { | |
213 | struct snd_soc_codec *codec = codec_dai->codec; | |
214 | struct wm8523_priv *wm8523 = codec->private_data; | |
215 | unsigned int val; | |
216 | int i; | |
217 | ||
218 | wm8523->sysclk = freq; | |
219 | ||
220 | wm8523->rate_constraint.count = 0; | |
221 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
222 | val = freq / lrclk_ratios[i].ratio; | |
223 | /* Check that it's a standard rate since core can't | |
224 | * cope with others and having the odd rates confuses | |
225 | * constraint matching. | |
226 | */ | |
227 | switch (val) { | |
228 | case 8000: | |
229 | case 11025: | |
230 | case 16000: | |
231 | case 22050: | |
232 | case 32000: | |
233 | case 44100: | |
234 | case 48000: | |
235 | case 64000: | |
236 | case 88200: | |
237 | case 96000: | |
238 | case 176400: | |
239 | case 192000: | |
240 | dev_dbg(codec->dev, "Supported sample rate: %dHz\n", | |
241 | val); | |
242 | wm8523->rate_constraint_list[i] = val; | |
243 | wm8523->rate_constraint.count++; | |
244 | break; | |
245 | default: | |
246 | dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", | |
247 | val); | |
248 | } | |
249 | } | |
250 | ||
251 | /* Need at least one supported rate... */ | |
252 | if (wm8523->rate_constraint.count == 0) | |
253 | return -EINVAL; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | ||
259 | static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
260 | unsigned int fmt) | |
261 | { | |
262 | struct snd_soc_codec *codec = codec_dai->codec; | |
8d50e447 | 263 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
1dcf98ff MB |
264 | |
265 | aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK | | |
266 | WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK); | |
267 | ||
268 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
269 | case SND_SOC_DAIFMT_CBM_CFM: | |
270 | aifctrl1 |= WM8523_AIF_MSTR; | |
271 | break; | |
272 | case SND_SOC_DAIFMT_CBS_CFS: | |
273 | break; | |
274 | default: | |
275 | return -EINVAL; | |
276 | } | |
277 | ||
278 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
279 | case SND_SOC_DAIFMT_I2S: | |
280 | aifctrl1 |= 0x0002; | |
281 | break; | |
282 | case SND_SOC_DAIFMT_RIGHT_J: | |
283 | break; | |
284 | case SND_SOC_DAIFMT_LEFT_J: | |
285 | aifctrl1 |= 0x0001; | |
286 | break; | |
287 | case SND_SOC_DAIFMT_DSP_A: | |
288 | aifctrl1 |= 0x0003; | |
289 | break; | |
290 | case SND_SOC_DAIFMT_DSP_B: | |
291 | aifctrl1 |= 0x0023; | |
292 | break; | |
293 | default: | |
294 | return -EINVAL; | |
295 | } | |
296 | ||
297 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
298 | case SND_SOC_DAIFMT_NB_NF: | |
299 | break; | |
300 | case SND_SOC_DAIFMT_IB_IF: | |
301 | aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV; | |
302 | break; | |
303 | case SND_SOC_DAIFMT_IB_NF: | |
304 | aifctrl1 |= WM8523_BCLK_INV; | |
305 | break; | |
306 | case SND_SOC_DAIFMT_NB_IF: | |
307 | aifctrl1 |= WM8523_LRCLK_INV; | |
308 | break; | |
309 | default: | |
310 | return -EINVAL; | |
311 | } | |
312 | ||
8d50e447 | 313 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
1dcf98ff MB |
314 | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static int wm8523_set_bias_level(struct snd_soc_codec *codec, | |
319 | enum snd_soc_bias_level level) | |
320 | { | |
321 | struct wm8523_priv *wm8523 = codec->private_data; | |
322 | int ret, i; | |
323 | ||
324 | switch (level) { | |
325 | case SND_SOC_BIAS_ON: | |
326 | break; | |
327 | ||
328 | case SND_SOC_BIAS_PREPARE: | |
329 | /* Full power on */ | |
330 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
331 | WM8523_SYS_ENA_MASK, 3); | |
332 | break; | |
333 | ||
334 | case SND_SOC_BIAS_STANDBY: | |
335 | if (codec->bias_level == SND_SOC_BIAS_OFF) { | |
336 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), | |
337 | wm8523->supplies); | |
338 | if (ret != 0) { | |
339 | dev_err(codec->dev, | |
340 | "Failed to enable supplies: %d\n", | |
341 | ret); | |
342 | return ret; | |
343 | } | |
344 | ||
345 | /* Initial power up */ | |
346 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
347 | WM8523_SYS_ENA_MASK, 1); | |
348 | ||
349 | /* Sync back default/cached values */ | |
350 | for (i = WM8523_AIF_CTRL1; | |
351 | i < WM8523_MAX_REGISTER; i++) | |
8d50e447 | 352 | snd_soc_write(codec, i, wm8523->reg_cache[i]); |
1dcf98ff MB |
353 | |
354 | ||
355 | msleep(100); | |
356 | } | |
357 | ||
358 | /* Power up to mute */ | |
359 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
360 | WM8523_SYS_ENA_MASK, 2); | |
361 | ||
362 | break; | |
363 | ||
364 | case SND_SOC_BIAS_OFF: | |
365 | /* The chip runs through the power down sequence for us. */ | |
366 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
367 | WM8523_SYS_ENA_MASK, 0); | |
368 | msleep(100); | |
369 | ||
370 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), | |
371 | wm8523->supplies); | |
372 | break; | |
373 | } | |
374 | codec->bias_level = level; | |
375 | return 0; | |
376 | } | |
377 | ||
378 | #define WM8523_RATES SNDRV_PCM_RATE_8000_192000 | |
379 | ||
380 | #define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
381 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) | |
382 | ||
383 | static struct snd_soc_dai_ops wm8523_dai_ops = { | |
384 | .startup = wm8523_startup, | |
385 | .hw_params = wm8523_hw_params, | |
386 | .set_sysclk = wm8523_set_dai_sysclk, | |
387 | .set_fmt = wm8523_set_dai_fmt, | |
388 | }; | |
389 | ||
390 | struct snd_soc_dai wm8523_dai = { | |
391 | .name = "WM8523", | |
392 | .playback = { | |
393 | .stream_name = "Playback", | |
394 | .channels_min = 2, /* Mono modes not yet supported */ | |
395 | .channels_max = 2, | |
396 | .rates = WM8523_RATES, | |
397 | .formats = WM8523_FORMATS, | |
398 | }, | |
399 | .ops = &wm8523_dai_ops, | |
400 | }; | |
401 | EXPORT_SYMBOL_GPL(wm8523_dai); | |
402 | ||
403 | #ifdef CONFIG_PM | |
404 | static int wm8523_suspend(struct platform_device *pdev, pm_message_t state) | |
405 | { | |
406 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
407 | struct snd_soc_codec *codec = socdev->card->codec; | |
408 | ||
409 | wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
410 | return 0; | |
411 | } | |
412 | ||
413 | static int wm8523_resume(struct platform_device *pdev) | |
414 | { | |
415 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
416 | struct snd_soc_codec *codec = socdev->card->codec; | |
417 | ||
418 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | #else | |
423 | #define wm8523_suspend NULL | |
424 | #define wm8523_resume NULL | |
425 | #endif | |
426 | ||
427 | static int wm8523_probe(struct platform_device *pdev) | |
428 | { | |
429 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
430 | struct snd_soc_codec *codec; | |
431 | int ret = 0; | |
432 | ||
433 | if (wm8523_codec == NULL) { | |
434 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
435 | return -ENODEV; | |
436 | } | |
437 | ||
438 | socdev->card->codec = wm8523_codec; | |
439 | codec = wm8523_codec; | |
440 | ||
441 | /* register pcms */ | |
442 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
443 | if (ret < 0) { | |
444 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
445 | goto pcm_err; | |
446 | } | |
447 | ||
448 | snd_soc_add_controls(codec, wm8523_snd_controls, | |
449 | ARRAY_SIZE(wm8523_snd_controls)); | |
450 | wm8523_add_widgets(codec); | |
1dcf98ff MB |
451 | |
452 | return ret; | |
453 | ||
1dcf98ff MB |
454 | pcm_err: |
455 | return ret; | |
456 | } | |
457 | ||
458 | static int wm8523_remove(struct platform_device *pdev) | |
459 | { | |
460 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
461 | ||
462 | snd_soc_free_pcms(socdev); | |
463 | snd_soc_dapm_free(socdev); | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | struct snd_soc_codec_device soc_codec_dev_wm8523 = { | |
469 | .probe = wm8523_probe, | |
470 | .remove = wm8523_remove, | |
471 | .suspend = wm8523_suspend, | |
472 | .resume = wm8523_resume, | |
473 | }; | |
474 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8523); | |
475 | ||
8d50e447 MB |
476 | static int wm8523_register(struct wm8523_priv *wm8523, |
477 | enum snd_soc_control_type control) | |
1dcf98ff MB |
478 | { |
479 | int ret; | |
480 | struct snd_soc_codec *codec = &wm8523->codec; | |
481 | int i; | |
482 | ||
483 | if (wm8523_codec) { | |
484 | dev_err(codec->dev, "Another WM8523 is registered\n"); | |
485 | return -EINVAL; | |
486 | } | |
487 | ||
488 | mutex_init(&codec->mutex); | |
489 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
490 | INIT_LIST_HEAD(&codec->dapm_paths); | |
491 | ||
492 | codec->private_data = wm8523; | |
493 | codec->name = "WM8523"; | |
494 | codec->owner = THIS_MODULE; | |
1dcf98ff MB |
495 | codec->bias_level = SND_SOC_BIAS_OFF; |
496 | codec->set_bias_level = wm8523_set_bias_level; | |
497 | codec->dai = &wm8523_dai; | |
498 | codec->num_dai = 1; | |
499 | codec->reg_cache_size = WM8523_REGISTER_COUNT; | |
500 | codec->reg_cache = &wm8523->reg_cache; | |
8d50e447 | 501 | codec->volatile_register = wm8523_volatile_register; |
1dcf98ff MB |
502 | |
503 | wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0]; | |
504 | wm8523->rate_constraint.count = | |
505 | ARRAY_SIZE(wm8523->rate_constraint_list); | |
506 | ||
507 | memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg)); | |
508 | ||
8d50e447 MB |
509 | ret = snd_soc_codec_set_cache_io(codec, 8, 16, control); |
510 | if (ret != 0) { | |
511 | dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); | |
512 | goto err; | |
513 | } | |
514 | ||
1dcf98ff MB |
515 | for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++) |
516 | wm8523->supplies[i].supply = wm8523_supply_names[i]; | |
517 | ||
518 | ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies), | |
519 | wm8523->supplies); | |
520 | if (ret != 0) { | |
521 | dev_err(codec->dev, "Failed to request supplies: %d\n", ret); | |
522 | goto err; | |
523 | } | |
524 | ||
525 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), | |
526 | wm8523->supplies); | |
527 | if (ret != 0) { | |
528 | dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); | |
529 | goto err_get; | |
530 | } | |
531 | ||
8d50e447 | 532 | ret = snd_soc_read(codec, WM8523_DEVICE_ID); |
1dcf98ff MB |
533 | if (ret < 0) { |
534 | dev_err(codec->dev, "Failed to read ID register\n"); | |
535 | goto err_enable; | |
536 | } | |
537 | if (ret != wm8523_reg[WM8523_DEVICE_ID]) { | |
538 | dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret); | |
539 | ret = -EINVAL; | |
540 | goto err_enable; | |
541 | } | |
542 | ||
8d50e447 | 543 | ret = snd_soc_read(codec, WM8523_REVISION); |
1dcf98ff MB |
544 | if (ret < 0) { |
545 | dev_err(codec->dev, "Failed to read revision register\n"); | |
546 | goto err_enable; | |
547 | } | |
548 | dev_info(codec->dev, "revision %c\n", | |
549 | (ret & WM8523_CHIP_REV_MASK) + 'A'); | |
550 | ||
551 | ret = wm8523_reset(codec); | |
552 | if (ret < 0) { | |
553 | dev_err(codec->dev, "Failed to issue reset\n"); | |
554 | goto err_enable; | |
555 | } | |
556 | ||
557 | wm8523_dai.dev = codec->dev; | |
558 | ||
559 | /* Change some default settings - latch VU and enable ZC */ | |
560 | wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU; | |
561 | wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC; | |
562 | ||
563 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
564 | ||
565 | /* Bias level configuration will have done an extra enable */ | |
566 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
567 | ||
568 | wm8523_codec = codec; | |
569 | ||
570 | ret = snd_soc_register_codec(codec); | |
571 | if (ret != 0) { | |
572 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
573 | return ret; | |
574 | } | |
575 | ||
576 | ret = snd_soc_register_dai(&wm8523_dai); | |
577 | if (ret != 0) { | |
578 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
579 | snd_soc_unregister_codec(codec); | |
580 | return ret; | |
581 | } | |
582 | ||
583 | return 0; | |
584 | ||
585 | err_enable: | |
586 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
587 | err_get: | |
588 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
589 | err: | |
590 | kfree(wm8523); | |
591 | return ret; | |
592 | } | |
593 | ||
594 | static void wm8523_unregister(struct wm8523_priv *wm8523) | |
595 | { | |
596 | wm8523_set_bias_level(&wm8523->codec, SND_SOC_BIAS_OFF); | |
597 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
598 | snd_soc_unregister_dai(&wm8523_dai); | |
599 | snd_soc_unregister_codec(&wm8523->codec); | |
600 | kfree(wm8523); | |
601 | wm8523_codec = NULL; | |
602 | } | |
603 | ||
604 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
605 | static __devinit int wm8523_i2c_probe(struct i2c_client *i2c, | |
606 | const struct i2c_device_id *id) | |
607 | { | |
608 | struct wm8523_priv *wm8523; | |
609 | struct snd_soc_codec *codec; | |
610 | ||
611 | wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL); | |
612 | if (wm8523 == NULL) | |
613 | return -ENOMEM; | |
614 | ||
615 | codec = &wm8523->codec; | |
616 | codec->hw_write = (hw_write_t)i2c_master_send; | |
617 | ||
618 | i2c_set_clientdata(i2c, wm8523); | |
619 | codec->control_data = i2c; | |
620 | ||
621 | codec->dev = &i2c->dev; | |
622 | ||
8d50e447 | 623 | return wm8523_register(wm8523, SND_SOC_I2C); |
1dcf98ff MB |
624 | } |
625 | ||
626 | static __devexit int wm8523_i2c_remove(struct i2c_client *client) | |
627 | { | |
628 | struct wm8523_priv *wm8523 = i2c_get_clientdata(client); | |
629 | wm8523_unregister(wm8523); | |
630 | return 0; | |
631 | } | |
632 | ||
1dcf98ff MB |
633 | static const struct i2c_device_id wm8523_i2c_id[] = { |
634 | { "wm8523", 0 }, | |
635 | { } | |
636 | }; | |
637 | MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id); | |
638 | ||
639 | static struct i2c_driver wm8523_i2c_driver = { | |
640 | .driver = { | |
641 | .name = "WM8523", | |
642 | .owner = THIS_MODULE, | |
643 | }, | |
644 | .probe = wm8523_i2c_probe, | |
645 | .remove = __devexit_p(wm8523_i2c_remove), | |
1dcf98ff MB |
646 | .id_table = wm8523_i2c_id, |
647 | }; | |
648 | #endif | |
649 | ||
650 | static int __init wm8523_modinit(void) | |
651 | { | |
652 | int ret; | |
653 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
654 | ret = i2c_add_driver(&wm8523_i2c_driver); | |
655 | if (ret != 0) { | |
656 | printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n", | |
657 | ret); | |
658 | } | |
659 | #endif | |
660 | return 0; | |
661 | } | |
662 | module_init(wm8523_modinit); | |
663 | ||
664 | static void __exit wm8523_exit(void) | |
665 | { | |
666 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
667 | i2c_del_driver(&wm8523_i2c_driver); | |
668 | #endif | |
669 | } | |
670 | module_exit(wm8523_exit); | |
671 | ||
672 | MODULE_DESCRIPTION("ASoC WM8523 driver"); | |
673 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
674 | MODULE_LICENSE("GPL"); |