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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> | |
1dcf98ff | 20 | #include <linux/regulator/consumer.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
bf5a85be | 22 | #include <linux/of_device.h> |
1dcf98ff MB |
23 | #include <sound/core.h> |
24 | #include <sound/pcm.h> | |
25 | #include <sound/pcm_params.h> | |
26 | #include <sound/soc.h> | |
1dcf98ff MB |
27 | #include <sound/initval.h> |
28 | #include <sound/tlv.h> | |
29 | ||
30 | #include "wm8523.h" | |
31 | ||
1dcf98ff MB |
32 | #define WM8523_NUM_SUPPLIES 2 |
33 | static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = { | |
34 | "AVDD", | |
35 | "LINEVDD", | |
36 | }; | |
37 | ||
38 | #define WM8523_NUM_RATES 7 | |
39 | ||
40 | /* codec private data */ | |
41 | struct wm8523_priv { | |
f0fba2ad | 42 | enum snd_soc_control_type control_type; |
1dcf98ff MB |
43 | struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES]; |
44 | unsigned int sysclk; | |
45 | unsigned int rate_constraint_list[WM8523_NUM_RATES]; | |
46 | struct snd_pcm_hw_constraint_list rate_constraint; | |
47 | }; | |
48 | ||
49 | static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = { | |
50 | 0x8523, /* R0 - DEVICE_ID */ | |
51 | 0x0001, /* R1 - REVISION */ | |
52 | 0x0000, /* R2 - PSCTRL1 */ | |
53 | 0x1812, /* R3 - AIF_CTRL1 */ | |
54 | 0x0000, /* R4 - AIF_CTRL2 */ | |
55 | 0x0001, /* R5 - DAC_CTRL3 */ | |
56 | 0x0190, /* R6 - DAC_GAINL */ | |
57 | 0x0190, /* R7 - DAC_GAINR */ | |
58 | 0x0000, /* R8 - ZERO_DETECT */ | |
59 | }; | |
60 | ||
d4754ec9 | 61 | static int wm8523_volatile_register(struct snd_soc_codec *codec, unsigned int reg) |
1dcf98ff MB |
62 | { |
63 | switch (reg) { | |
64 | case WM8523_DEVICE_ID: | |
65 | case WM8523_REVISION: | |
66 | return 1; | |
67 | default: | |
68 | return 0; | |
69 | } | |
70 | } | |
71 | ||
1dcf98ff MB |
72 | static int wm8523_reset(struct snd_soc_codec *codec) |
73 | { | |
8d50e447 | 74 | return snd_soc_write(codec, WM8523_DEVICE_ID, 0); |
1dcf98ff MB |
75 | } |
76 | ||
77 | static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0); | |
78 | ||
79 | static const char *wm8523_zd_count_text[] = { | |
80 | "1024", | |
81 | "2048", | |
82 | }; | |
83 | ||
84 | static const struct soc_enum wm8523_zc_count = | |
85 | SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text); | |
86 | ||
1661699a | 87 | static const struct snd_kcontrol_new wm8523_controls[] = { |
1dcf98ff MB |
88 | SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR, |
89 | 0, 448, 0, dac_tlv), | |
90 | SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0), | |
91 | SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0), | |
92 | SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1), | |
93 | SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0), | |
94 | SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0), | |
95 | SOC_ENUM("Zero Detect Count", wm8523_zc_count), | |
96 | }; | |
97 | ||
98 | static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = { | |
99 | SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), | |
100 | SND_SOC_DAPM_OUTPUT("LINEVOUTL"), | |
101 | SND_SOC_DAPM_OUTPUT("LINEVOUTR"), | |
102 | }; | |
103 | ||
1661699a | 104 | static const struct snd_soc_dapm_route wm8523_dapm_routes[] = { |
1dcf98ff MB |
105 | { "LINEVOUTL", NULL, "DAC" }, |
106 | { "LINEVOUTR", NULL, "DAC" }, | |
107 | }; | |
108 | ||
1dcf98ff MB |
109 | static struct { |
110 | int value; | |
111 | int ratio; | |
112 | } lrclk_ratios[WM8523_NUM_RATES] = { | |
113 | { 1, 128 }, | |
114 | { 2, 192 }, | |
115 | { 3, 256 }, | |
116 | { 4, 384 }, | |
117 | { 5, 512 }, | |
118 | { 6, 768 }, | |
119 | { 7, 1152 }, | |
120 | }; | |
121 | ||
122 | static int wm8523_startup(struct snd_pcm_substream *substream, | |
123 | struct snd_soc_dai *dai) | |
124 | { | |
125 | struct snd_soc_codec *codec = dai->codec; | |
b2c812e2 | 126 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
1dcf98ff MB |
127 | |
128 | /* The set of sample rates that can be supported depends on the | |
129 | * MCLK supplied to the CODEC - enforce this. | |
130 | */ | |
131 | if (!wm8523->sysclk) { | |
132 | dev_err(codec->dev, | |
133 | "No MCLK configured, call set_sysclk() on init\n"); | |
134 | return -EINVAL; | |
135 | } | |
136 | ||
1dcf98ff MB |
137 | snd_pcm_hw_constraint_list(substream->runtime, 0, |
138 | SNDRV_PCM_HW_PARAM_RATE, | |
139 | &wm8523->rate_constraint); | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | static int wm8523_hw_params(struct snd_pcm_substream *substream, | |
145 | struct snd_pcm_hw_params *params, | |
146 | struct snd_soc_dai *dai) | |
147 | { | |
148 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 149 | struct snd_soc_codec *codec = rtd->codec; |
b2c812e2 | 150 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
1dcf98ff | 151 | int i; |
8d50e447 MB |
152 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
153 | u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2); | |
1dcf98ff MB |
154 | |
155 | /* Find a supported LRCLK ratio */ | |
156 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
157 | if (wm8523->sysclk / params_rate(params) == | |
158 | lrclk_ratios[i].ratio) | |
159 | break; | |
160 | } | |
161 | ||
162 | /* Should never happen, should be handled by constraints */ | |
163 | if (i == ARRAY_SIZE(lrclk_ratios)) { | |
164 | dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", | |
165 | wm8523->sysclk / params_rate(params)); | |
166 | return -EINVAL; | |
167 | } | |
168 | ||
169 | aifctrl2 &= ~WM8523_SR_MASK; | |
170 | aifctrl2 |= lrclk_ratios[i].value; | |
171 | ||
172 | aifctrl1 &= ~WM8523_WL_MASK; | |
173 | switch (params_format(params)) { | |
174 | case SNDRV_PCM_FORMAT_S16_LE: | |
175 | break; | |
176 | case SNDRV_PCM_FORMAT_S20_3LE: | |
177 | aifctrl1 |= 0x8; | |
178 | break; | |
179 | case SNDRV_PCM_FORMAT_S24_LE: | |
180 | aifctrl1 |= 0x10; | |
181 | break; | |
182 | case SNDRV_PCM_FORMAT_S32_LE: | |
183 | aifctrl1 |= 0x18; | |
184 | break; | |
185 | } | |
186 | ||
8d50e447 MB |
187 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
188 | snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2); | |
1dcf98ff MB |
189 | |
190 | return 0; | |
191 | } | |
192 | ||
193 | static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
194 | int clk_id, unsigned int freq, int dir) | |
195 | { | |
196 | struct snd_soc_codec *codec = codec_dai->codec; | |
b2c812e2 | 197 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
1dcf98ff MB |
198 | unsigned int val; |
199 | int i; | |
200 | ||
201 | wm8523->sysclk = freq; | |
202 | ||
203 | wm8523->rate_constraint.count = 0; | |
204 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
205 | val = freq / lrclk_ratios[i].ratio; | |
206 | /* Check that it's a standard rate since core can't | |
207 | * cope with others and having the odd rates confuses | |
208 | * constraint matching. | |
209 | */ | |
210 | switch (val) { | |
211 | case 8000: | |
212 | case 11025: | |
213 | case 16000: | |
214 | case 22050: | |
215 | case 32000: | |
216 | case 44100: | |
217 | case 48000: | |
218 | case 64000: | |
219 | case 88200: | |
220 | case 96000: | |
221 | case 176400: | |
222 | case 192000: | |
223 | dev_dbg(codec->dev, "Supported sample rate: %dHz\n", | |
224 | val); | |
225 | wm8523->rate_constraint_list[i] = val; | |
226 | wm8523->rate_constraint.count++; | |
227 | break; | |
228 | default: | |
229 | dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", | |
230 | val); | |
231 | } | |
232 | } | |
233 | ||
234 | /* Need at least one supported rate... */ | |
235 | if (wm8523->rate_constraint.count == 0) | |
236 | return -EINVAL; | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | ||
242 | static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
243 | unsigned int fmt) | |
244 | { | |
245 | struct snd_soc_codec *codec = codec_dai->codec; | |
8d50e447 | 246 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
1dcf98ff MB |
247 | |
248 | aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK | | |
249 | WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK); | |
250 | ||
251 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
252 | case SND_SOC_DAIFMT_CBM_CFM: | |
253 | aifctrl1 |= WM8523_AIF_MSTR; | |
254 | break; | |
255 | case SND_SOC_DAIFMT_CBS_CFS: | |
256 | break; | |
257 | default: | |
258 | return -EINVAL; | |
259 | } | |
260 | ||
261 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
262 | case SND_SOC_DAIFMT_I2S: | |
263 | aifctrl1 |= 0x0002; | |
264 | break; | |
265 | case SND_SOC_DAIFMT_RIGHT_J: | |
266 | break; | |
267 | case SND_SOC_DAIFMT_LEFT_J: | |
268 | aifctrl1 |= 0x0001; | |
269 | break; | |
270 | case SND_SOC_DAIFMT_DSP_A: | |
271 | aifctrl1 |= 0x0003; | |
272 | break; | |
273 | case SND_SOC_DAIFMT_DSP_B: | |
274 | aifctrl1 |= 0x0023; | |
275 | break; | |
276 | default: | |
277 | return -EINVAL; | |
278 | } | |
279 | ||
280 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
281 | case SND_SOC_DAIFMT_NB_NF: | |
282 | break; | |
283 | case SND_SOC_DAIFMT_IB_IF: | |
284 | aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV; | |
285 | break; | |
286 | case SND_SOC_DAIFMT_IB_NF: | |
287 | aifctrl1 |= WM8523_BCLK_INV; | |
288 | break; | |
289 | case SND_SOC_DAIFMT_NB_IF: | |
290 | aifctrl1 |= WM8523_LRCLK_INV; | |
291 | break; | |
292 | default: | |
293 | return -EINVAL; | |
294 | } | |
295 | ||
8d50e447 | 296 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
1dcf98ff MB |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
301 | static int wm8523_set_bias_level(struct snd_soc_codec *codec, | |
302 | enum snd_soc_bias_level level) | |
303 | { | |
b2c812e2 | 304 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
beebca31 | 305 | u16 *reg_cache = codec->reg_cache; |
1dcf98ff MB |
306 | int ret, i; |
307 | ||
308 | switch (level) { | |
309 | case SND_SOC_BIAS_ON: | |
310 | break; | |
311 | ||
312 | case SND_SOC_BIAS_PREPARE: | |
313 | /* Full power on */ | |
314 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
315 | WM8523_SYS_ENA_MASK, 3); | |
316 | break; | |
317 | ||
318 | case SND_SOC_BIAS_STANDBY: | |
ce6120cc | 319 | if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { |
1dcf98ff MB |
320 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), |
321 | wm8523->supplies); | |
322 | if (ret != 0) { | |
323 | dev_err(codec->dev, | |
324 | "Failed to enable supplies: %d\n", | |
325 | ret); | |
326 | return ret; | |
327 | } | |
328 | ||
329 | /* Initial power up */ | |
330 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
331 | WM8523_SYS_ENA_MASK, 1); | |
332 | ||
333 | /* Sync back default/cached values */ | |
334 | for (i = WM8523_AIF_CTRL1; | |
335 | i < WM8523_MAX_REGISTER; i++) | |
beebca31 | 336 | snd_soc_write(codec, i, reg_cache[i]); |
1dcf98ff MB |
337 | |
338 | ||
339 | msleep(100); | |
340 | } | |
341 | ||
342 | /* Power up to mute */ | |
343 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
344 | WM8523_SYS_ENA_MASK, 2); | |
345 | ||
346 | break; | |
347 | ||
348 | case SND_SOC_BIAS_OFF: | |
349 | /* The chip runs through the power down sequence for us. */ | |
350 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
351 | WM8523_SYS_ENA_MASK, 0); | |
352 | msleep(100); | |
353 | ||
354 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), | |
355 | wm8523->supplies); | |
356 | break; | |
357 | } | |
ce6120cc | 358 | codec->dapm.bias_level = level; |
1dcf98ff MB |
359 | return 0; |
360 | } | |
361 | ||
362 | #define WM8523_RATES SNDRV_PCM_RATE_8000_192000 | |
363 | ||
364 | #define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
365 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) | |
366 | ||
85e7652d | 367 | static const struct snd_soc_dai_ops wm8523_dai_ops = { |
1dcf98ff MB |
368 | .startup = wm8523_startup, |
369 | .hw_params = wm8523_hw_params, | |
370 | .set_sysclk = wm8523_set_dai_sysclk, | |
371 | .set_fmt = wm8523_set_dai_fmt, | |
372 | }; | |
373 | ||
f0fba2ad LG |
374 | static struct snd_soc_dai_driver wm8523_dai = { |
375 | .name = "wm8523-hifi", | |
1dcf98ff MB |
376 | .playback = { |
377 | .stream_name = "Playback", | |
378 | .channels_min = 2, /* Mono modes not yet supported */ | |
379 | .channels_max = 2, | |
380 | .rates = WM8523_RATES, | |
381 | .formats = WM8523_FORMATS, | |
382 | }, | |
383 | .ops = &wm8523_dai_ops, | |
384 | }; | |
1dcf98ff MB |
385 | |
386 | #ifdef CONFIG_PM | |
f0fba2ad | 387 | static int wm8523_suspend(struct snd_soc_codec *codec, pm_message_t state) |
1dcf98ff | 388 | { |
1dcf98ff MB |
389 | wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); |
390 | return 0; | |
391 | } | |
392 | ||
f0fba2ad | 393 | static int wm8523_resume(struct snd_soc_codec *codec) |
1dcf98ff | 394 | { |
1dcf98ff | 395 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
1dcf98ff MB |
396 | return 0; |
397 | } | |
398 | #else | |
399 | #define wm8523_suspend NULL | |
400 | #define wm8523_resume NULL | |
401 | #endif | |
402 | ||
f0fba2ad | 403 | static int wm8523_probe(struct snd_soc_codec *codec) |
1dcf98ff | 404 | { |
f0fba2ad LG |
405 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
406 | int ret, i; | |
1dcf98ff MB |
407 | |
408 | wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0]; | |
409 | wm8523->rate_constraint.count = | |
410 | ARRAY_SIZE(wm8523->rate_constraint_list); | |
411 | ||
f0fba2ad | 412 | ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8523->control_type); |
8d50e447 MB |
413 | if (ret != 0) { |
414 | dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); | |
f0fba2ad | 415 | return ret; |
8d50e447 MB |
416 | } |
417 | ||
1dcf98ff MB |
418 | for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++) |
419 | wm8523->supplies[i].supply = wm8523_supply_names[i]; | |
420 | ||
421 | ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies), | |
422 | wm8523->supplies); | |
423 | if (ret != 0) { | |
424 | dev_err(codec->dev, "Failed to request supplies: %d\n", ret); | |
f0fba2ad | 425 | return ret; |
1dcf98ff MB |
426 | } |
427 | ||
428 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), | |
429 | wm8523->supplies); | |
430 | if (ret != 0) { | |
431 | dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); | |
432 | goto err_get; | |
433 | } | |
434 | ||
8d50e447 | 435 | ret = snd_soc_read(codec, WM8523_DEVICE_ID); |
1dcf98ff MB |
436 | if (ret < 0) { |
437 | dev_err(codec->dev, "Failed to read ID register\n"); | |
438 | goto err_enable; | |
439 | } | |
440 | if (ret != wm8523_reg[WM8523_DEVICE_ID]) { | |
441 | dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret); | |
442 | ret = -EINVAL; | |
443 | goto err_enable; | |
444 | } | |
445 | ||
8d50e447 | 446 | ret = snd_soc_read(codec, WM8523_REVISION); |
1dcf98ff MB |
447 | if (ret < 0) { |
448 | dev_err(codec->dev, "Failed to read revision register\n"); | |
449 | goto err_enable; | |
450 | } | |
451 | dev_info(codec->dev, "revision %c\n", | |
452 | (ret & WM8523_CHIP_REV_MASK) + 'A'); | |
453 | ||
454 | ret = wm8523_reset(codec); | |
455 | if (ret < 0) { | |
456 | dev_err(codec->dev, "Failed to issue reset\n"); | |
457 | goto err_enable; | |
458 | } | |
459 | ||
1dcf98ff | 460 | /* Change some default settings - latch VU and enable ZC */ |
a1b3b5ee MB |
461 | snd_soc_update_bits(codec, WM8523_DAC_GAINR, |
462 | WM8523_DACR_VU, WM8523_DACR_VU); | |
463 | snd_soc_update_bits(codec, WM8523_DAC_CTRL3, WM8523_ZC, WM8523_ZC); | |
1dcf98ff MB |
464 | |
465 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
466 | ||
467 | /* Bias level configuration will have done an extra enable */ | |
468 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
469 | ||
1dcf98ff MB |
470 | return 0; |
471 | ||
472 | err_enable: | |
473 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
474 | err_get: | |
475 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
f0fba2ad | 476 | |
1dcf98ff MB |
477 | return ret; |
478 | } | |
479 | ||
f0fba2ad | 480 | static int wm8523_remove(struct snd_soc_codec *codec) |
1dcf98ff | 481 | { |
f0fba2ad LG |
482 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
483 | ||
484 | wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
1dcf98ff | 485 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); |
f0fba2ad | 486 | return 0; |
1dcf98ff MB |
487 | } |
488 | ||
f0fba2ad LG |
489 | static struct snd_soc_codec_driver soc_codec_dev_wm8523 = { |
490 | .probe = wm8523_probe, | |
491 | .remove = wm8523_remove, | |
492 | .suspend = wm8523_suspend, | |
493 | .resume = wm8523_resume, | |
494 | .set_bias_level = wm8523_set_bias_level, | |
495 | .reg_cache_size = WM8523_REGISTER_COUNT, | |
496 | .reg_word_size = sizeof(u16), | |
497 | .reg_cache_default = wm8523_reg, | |
498 | .volatile_register = wm8523_volatile_register, | |
1661699a MB |
499 | |
500 | .controls = wm8523_controls, | |
501 | .num_controls = ARRAY_SIZE(wm8523_controls), | |
502 | .dapm_widgets = wm8523_dapm_widgets, | |
503 | .num_dapm_widgets = ARRAY_SIZE(wm8523_dapm_widgets), | |
504 | .dapm_routes = wm8523_dapm_routes, | |
505 | .num_dapm_routes = ARRAY_SIZE(wm8523_dapm_routes), | |
f0fba2ad LG |
506 | }; |
507 | ||
bf5a85be MB |
508 | static const struct of_device_id wm8523_of_match[] = { |
509 | { .compatible = "wlf,wm8523" }, | |
510 | { }, | |
511 | }; | |
512 | ||
1dcf98ff MB |
513 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
514 | static __devinit int wm8523_i2c_probe(struct i2c_client *i2c, | |
515 | const struct i2c_device_id *id) | |
516 | { | |
517 | struct wm8523_priv *wm8523; | |
f0fba2ad | 518 | int ret; |
1dcf98ff MB |
519 | |
520 | wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL); | |
521 | if (wm8523 == NULL) | |
522 | return -ENOMEM; | |
523 | ||
1dcf98ff | 524 | i2c_set_clientdata(i2c, wm8523); |
f0fba2ad | 525 | wm8523->control_type = SND_SOC_I2C; |
1dcf98ff | 526 | |
f0fba2ad LG |
527 | ret = snd_soc_register_codec(&i2c->dev, |
528 | &soc_codec_dev_wm8523, &wm8523_dai, 1); | |
529 | if (ret < 0) | |
530 | kfree(wm8523); | |
531 | return ret; | |
1dcf98ff | 532 | |
1dcf98ff MB |
533 | } |
534 | ||
535 | static __devexit int wm8523_i2c_remove(struct i2c_client *client) | |
536 | { | |
f0fba2ad LG |
537 | snd_soc_unregister_codec(&client->dev); |
538 | kfree(i2c_get_clientdata(client)); | |
1dcf98ff MB |
539 | return 0; |
540 | } | |
541 | ||
1dcf98ff MB |
542 | static const struct i2c_device_id wm8523_i2c_id[] = { |
543 | { "wm8523", 0 }, | |
544 | { } | |
545 | }; | |
546 | MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id); | |
547 | ||
548 | static struct i2c_driver wm8523_i2c_driver = { | |
549 | .driver = { | |
9665408e | 550 | .name = "wm8523", |
1dcf98ff | 551 | .owner = THIS_MODULE, |
bf5a85be | 552 | .of_match_table = wm8523_of_match, |
1dcf98ff MB |
553 | }, |
554 | .probe = wm8523_i2c_probe, | |
555 | .remove = __devexit_p(wm8523_i2c_remove), | |
1dcf98ff MB |
556 | .id_table = wm8523_i2c_id, |
557 | }; | |
558 | #endif | |
559 | ||
560 | static int __init wm8523_modinit(void) | |
561 | { | |
562 | int ret; | |
563 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
564 | ret = i2c_add_driver(&wm8523_i2c_driver); | |
565 | if (ret != 0) { | |
566 | printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n", | |
567 | ret); | |
568 | } | |
569 | #endif | |
570 | return 0; | |
571 | } | |
572 | module_init(wm8523_modinit); | |
573 | ||
574 | static void __exit wm8523_exit(void) | |
575 | { | |
576 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
577 | i2c_del_driver(&wm8523_i2c_driver); | |
578 | #endif | |
579 | } | |
580 | module_exit(wm8523_exit); | |
581 | ||
582 | MODULE_DESCRIPTION("ASoC WM8523 driver"); | |
583 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
584 | MODULE_LICENSE("GPL"); |