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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 | ||
1dcf98ff MB |
33 | #define WM8523_NUM_SUPPLIES 2 |
34 | static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = { | |
35 | "AVDD", | |
36 | "LINEVDD", | |
37 | }; | |
38 | ||
39 | #define WM8523_NUM_RATES 7 | |
40 | ||
41 | /* codec private data */ | |
42 | struct wm8523_priv { | |
f0fba2ad | 43 | enum snd_soc_control_type control_type; |
1dcf98ff MB |
44 | struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES]; |
45 | unsigned int sysclk; | |
46 | unsigned int rate_constraint_list[WM8523_NUM_RATES]; | |
47 | struct snd_pcm_hw_constraint_list rate_constraint; | |
48 | }; | |
49 | ||
50 | static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = { | |
51 | 0x8523, /* R0 - DEVICE_ID */ | |
52 | 0x0001, /* R1 - REVISION */ | |
53 | 0x0000, /* R2 - PSCTRL1 */ | |
54 | 0x1812, /* R3 - AIF_CTRL1 */ | |
55 | 0x0000, /* R4 - AIF_CTRL2 */ | |
56 | 0x0001, /* R5 - DAC_CTRL3 */ | |
57 | 0x0190, /* R6 - DAC_GAINL */ | |
58 | 0x0190, /* R7 - DAC_GAINR */ | |
59 | 0x0000, /* R8 - ZERO_DETECT */ | |
60 | }; | |
61 | ||
8d50e447 | 62 | static int wm8523_volatile_register(unsigned int reg) |
1dcf98ff MB |
63 | { |
64 | switch (reg) { | |
65 | case WM8523_DEVICE_ID: | |
66 | case WM8523_REVISION: | |
67 | return 1; | |
68 | default: | |
69 | return 0; | |
70 | } | |
71 | } | |
72 | ||
1dcf98ff MB |
73 | static int wm8523_reset(struct snd_soc_codec *codec) |
74 | { | |
8d50e447 | 75 | return snd_soc_write(codec, WM8523_DEVICE_ID, 0); |
1dcf98ff MB |
76 | } |
77 | ||
78 | static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0); | |
79 | ||
80 | static const char *wm8523_zd_count_text[] = { | |
81 | "1024", | |
82 | "2048", | |
83 | }; | |
84 | ||
85 | static const struct soc_enum wm8523_zc_count = | |
86 | SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text); | |
87 | ||
88 | static const struct snd_kcontrol_new wm8523_snd_controls[] = { | |
89 | SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR, | |
90 | 0, 448, 0, dac_tlv), | |
91 | SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0), | |
92 | SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0), | |
93 | SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1), | |
94 | SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0), | |
95 | SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0), | |
96 | SOC_ENUM("Zero Detect Count", wm8523_zc_count), | |
97 | }; | |
98 | ||
99 | static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = { | |
100 | SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), | |
101 | SND_SOC_DAPM_OUTPUT("LINEVOUTL"), | |
102 | SND_SOC_DAPM_OUTPUT("LINEVOUTR"), | |
103 | }; | |
104 | ||
105 | static const struct snd_soc_dapm_route intercon[] = { | |
106 | { "LINEVOUTL", NULL, "DAC" }, | |
107 | { "LINEVOUTR", NULL, "DAC" }, | |
108 | }; | |
109 | ||
110 | static int wm8523_add_widgets(struct snd_soc_codec *codec) | |
111 | { | |
112 | snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets, | |
113 | ARRAY_SIZE(wm8523_dapm_widgets)); | |
114 | ||
115 | snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); | |
116 | ||
1dcf98ff MB |
117 | return 0; |
118 | } | |
119 | ||
120 | static struct { | |
121 | int value; | |
122 | int ratio; | |
123 | } lrclk_ratios[WM8523_NUM_RATES] = { | |
124 | { 1, 128 }, | |
125 | { 2, 192 }, | |
126 | { 3, 256 }, | |
127 | { 4, 384 }, | |
128 | { 5, 512 }, | |
129 | { 6, 768 }, | |
130 | { 7, 1152 }, | |
131 | }; | |
132 | ||
133 | static int wm8523_startup(struct snd_pcm_substream *substream, | |
134 | struct snd_soc_dai *dai) | |
135 | { | |
136 | struct snd_soc_codec *codec = dai->codec; | |
b2c812e2 | 137 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
1dcf98ff MB |
138 | |
139 | /* The set of sample rates that can be supported depends on the | |
140 | * MCLK supplied to the CODEC - enforce this. | |
141 | */ | |
142 | if (!wm8523->sysclk) { | |
143 | dev_err(codec->dev, | |
144 | "No MCLK configured, call set_sysclk() on init\n"); | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
1dcf98ff MB |
148 | snd_pcm_hw_constraint_list(substream->runtime, 0, |
149 | SNDRV_PCM_HW_PARAM_RATE, | |
150 | &wm8523->rate_constraint); | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static int wm8523_hw_params(struct snd_pcm_substream *substream, | |
156 | struct snd_pcm_hw_params *params, | |
157 | struct snd_soc_dai *dai) | |
158 | { | |
159 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 160 | struct snd_soc_codec *codec = rtd->codec; |
b2c812e2 | 161 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
1dcf98ff | 162 | int i; |
8d50e447 MB |
163 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
164 | u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2); | |
1dcf98ff MB |
165 | |
166 | /* Find a supported LRCLK ratio */ | |
167 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
168 | if (wm8523->sysclk / params_rate(params) == | |
169 | lrclk_ratios[i].ratio) | |
170 | break; | |
171 | } | |
172 | ||
173 | /* Should never happen, should be handled by constraints */ | |
174 | if (i == ARRAY_SIZE(lrclk_ratios)) { | |
175 | dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", | |
176 | wm8523->sysclk / params_rate(params)); | |
177 | return -EINVAL; | |
178 | } | |
179 | ||
180 | aifctrl2 &= ~WM8523_SR_MASK; | |
181 | aifctrl2 |= lrclk_ratios[i].value; | |
182 | ||
183 | aifctrl1 &= ~WM8523_WL_MASK; | |
184 | switch (params_format(params)) { | |
185 | case SNDRV_PCM_FORMAT_S16_LE: | |
186 | break; | |
187 | case SNDRV_PCM_FORMAT_S20_3LE: | |
188 | aifctrl1 |= 0x8; | |
189 | break; | |
190 | case SNDRV_PCM_FORMAT_S24_LE: | |
191 | aifctrl1 |= 0x10; | |
192 | break; | |
193 | case SNDRV_PCM_FORMAT_S32_LE: | |
194 | aifctrl1 |= 0x18; | |
195 | break; | |
196 | } | |
197 | ||
8d50e447 MB |
198 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
199 | snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2); | |
1dcf98ff MB |
200 | |
201 | return 0; | |
202 | } | |
203 | ||
204 | static int wm8523_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
205 | int clk_id, unsigned int freq, int dir) | |
206 | { | |
207 | struct snd_soc_codec *codec = codec_dai->codec; | |
b2c812e2 | 208 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
1dcf98ff MB |
209 | unsigned int val; |
210 | int i; | |
211 | ||
212 | wm8523->sysclk = freq; | |
213 | ||
214 | wm8523->rate_constraint.count = 0; | |
215 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
216 | val = freq / lrclk_ratios[i].ratio; | |
217 | /* Check that it's a standard rate since core can't | |
218 | * cope with others and having the odd rates confuses | |
219 | * constraint matching. | |
220 | */ | |
221 | switch (val) { | |
222 | case 8000: | |
223 | case 11025: | |
224 | case 16000: | |
225 | case 22050: | |
226 | case 32000: | |
227 | case 44100: | |
228 | case 48000: | |
229 | case 64000: | |
230 | case 88200: | |
231 | case 96000: | |
232 | case 176400: | |
233 | case 192000: | |
234 | dev_dbg(codec->dev, "Supported sample rate: %dHz\n", | |
235 | val); | |
236 | wm8523->rate_constraint_list[i] = val; | |
237 | wm8523->rate_constraint.count++; | |
238 | break; | |
239 | default: | |
240 | dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", | |
241 | val); | |
242 | } | |
243 | } | |
244 | ||
245 | /* Need at least one supported rate... */ | |
246 | if (wm8523->rate_constraint.count == 0) | |
247 | return -EINVAL; | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | ||
253 | static int wm8523_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
254 | unsigned int fmt) | |
255 | { | |
256 | struct snd_soc_codec *codec = codec_dai->codec; | |
8d50e447 | 257 | u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1); |
1dcf98ff MB |
258 | |
259 | aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK | | |
260 | WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK); | |
261 | ||
262 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
263 | case SND_SOC_DAIFMT_CBM_CFM: | |
264 | aifctrl1 |= WM8523_AIF_MSTR; | |
265 | break; | |
266 | case SND_SOC_DAIFMT_CBS_CFS: | |
267 | break; | |
268 | default: | |
269 | return -EINVAL; | |
270 | } | |
271 | ||
272 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
273 | case SND_SOC_DAIFMT_I2S: | |
274 | aifctrl1 |= 0x0002; | |
275 | break; | |
276 | case SND_SOC_DAIFMT_RIGHT_J: | |
277 | break; | |
278 | case SND_SOC_DAIFMT_LEFT_J: | |
279 | aifctrl1 |= 0x0001; | |
280 | break; | |
281 | case SND_SOC_DAIFMT_DSP_A: | |
282 | aifctrl1 |= 0x0003; | |
283 | break; | |
284 | case SND_SOC_DAIFMT_DSP_B: | |
285 | aifctrl1 |= 0x0023; | |
286 | break; | |
287 | default: | |
288 | return -EINVAL; | |
289 | } | |
290 | ||
291 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
292 | case SND_SOC_DAIFMT_NB_NF: | |
293 | break; | |
294 | case SND_SOC_DAIFMT_IB_IF: | |
295 | aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV; | |
296 | break; | |
297 | case SND_SOC_DAIFMT_IB_NF: | |
298 | aifctrl1 |= WM8523_BCLK_INV; | |
299 | break; | |
300 | case SND_SOC_DAIFMT_NB_IF: | |
301 | aifctrl1 |= WM8523_LRCLK_INV; | |
302 | break; | |
303 | default: | |
304 | return -EINVAL; | |
305 | } | |
306 | ||
8d50e447 | 307 | snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1); |
1dcf98ff MB |
308 | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static int wm8523_set_bias_level(struct snd_soc_codec *codec, | |
313 | enum snd_soc_bias_level level) | |
314 | { | |
b2c812e2 | 315 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
beebca31 | 316 | u16 *reg_cache = codec->reg_cache; |
1dcf98ff MB |
317 | int ret, i; |
318 | ||
319 | switch (level) { | |
320 | case SND_SOC_BIAS_ON: | |
321 | break; | |
322 | ||
323 | case SND_SOC_BIAS_PREPARE: | |
324 | /* Full power on */ | |
325 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
326 | WM8523_SYS_ENA_MASK, 3); | |
327 | break; | |
328 | ||
329 | case SND_SOC_BIAS_STANDBY: | |
330 | if (codec->bias_level == SND_SOC_BIAS_OFF) { | |
331 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), | |
332 | wm8523->supplies); | |
333 | if (ret != 0) { | |
334 | dev_err(codec->dev, | |
335 | "Failed to enable supplies: %d\n", | |
336 | ret); | |
337 | return ret; | |
338 | } | |
339 | ||
340 | /* Initial power up */ | |
341 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
342 | WM8523_SYS_ENA_MASK, 1); | |
343 | ||
344 | /* Sync back default/cached values */ | |
345 | for (i = WM8523_AIF_CTRL1; | |
346 | i < WM8523_MAX_REGISTER; i++) | |
beebca31 | 347 | snd_soc_write(codec, i, reg_cache[i]); |
1dcf98ff MB |
348 | |
349 | ||
350 | msleep(100); | |
351 | } | |
352 | ||
353 | /* Power up to mute */ | |
354 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
355 | WM8523_SYS_ENA_MASK, 2); | |
356 | ||
357 | break; | |
358 | ||
359 | case SND_SOC_BIAS_OFF: | |
360 | /* The chip runs through the power down sequence for us. */ | |
361 | snd_soc_update_bits(codec, WM8523_PSCTRL1, | |
362 | WM8523_SYS_ENA_MASK, 0); | |
363 | msleep(100); | |
364 | ||
365 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), | |
366 | wm8523->supplies); | |
367 | break; | |
368 | } | |
369 | codec->bias_level = level; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | #define WM8523_RATES SNDRV_PCM_RATE_8000_192000 | |
374 | ||
375 | #define WM8523_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
376 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) | |
377 | ||
378 | static struct snd_soc_dai_ops wm8523_dai_ops = { | |
379 | .startup = wm8523_startup, | |
380 | .hw_params = wm8523_hw_params, | |
381 | .set_sysclk = wm8523_set_dai_sysclk, | |
382 | .set_fmt = wm8523_set_dai_fmt, | |
383 | }; | |
384 | ||
f0fba2ad LG |
385 | static struct snd_soc_dai_driver wm8523_dai = { |
386 | .name = "wm8523-hifi", | |
1dcf98ff MB |
387 | .playback = { |
388 | .stream_name = "Playback", | |
389 | .channels_min = 2, /* Mono modes not yet supported */ | |
390 | .channels_max = 2, | |
391 | .rates = WM8523_RATES, | |
392 | .formats = WM8523_FORMATS, | |
393 | }, | |
394 | .ops = &wm8523_dai_ops, | |
395 | }; | |
1dcf98ff MB |
396 | |
397 | #ifdef CONFIG_PM | |
f0fba2ad | 398 | static int wm8523_suspend(struct snd_soc_codec *codec, pm_message_t state) |
1dcf98ff | 399 | { |
1dcf98ff MB |
400 | wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); |
401 | return 0; | |
402 | } | |
403 | ||
f0fba2ad | 404 | static int wm8523_resume(struct snd_soc_codec *codec) |
1dcf98ff | 405 | { |
1dcf98ff | 406 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
1dcf98ff MB |
407 | return 0; |
408 | } | |
409 | #else | |
410 | #define wm8523_suspend NULL | |
411 | #define wm8523_resume NULL | |
412 | #endif | |
413 | ||
f0fba2ad | 414 | static int wm8523_probe(struct snd_soc_codec *codec) |
1dcf98ff | 415 | { |
f0fba2ad | 416 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
beebca31 | 417 | u16 *reg_cache = codec->reg_cache; |
f0fba2ad | 418 | int ret, i; |
1dcf98ff | 419 | |
f0fba2ad | 420 | codec->hw_write = (hw_write_t)i2c_master_send; |
1dcf98ff MB |
421 | wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0]; |
422 | wm8523->rate_constraint.count = | |
423 | ARRAY_SIZE(wm8523->rate_constraint_list); | |
424 | ||
f0fba2ad | 425 | ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8523->control_type); |
8d50e447 MB |
426 | if (ret != 0) { |
427 | dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); | |
f0fba2ad | 428 | return ret; |
8d50e447 MB |
429 | } |
430 | ||
1dcf98ff MB |
431 | for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++) |
432 | wm8523->supplies[i].supply = wm8523_supply_names[i]; | |
433 | ||
434 | ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies), | |
435 | wm8523->supplies); | |
436 | if (ret != 0) { | |
437 | dev_err(codec->dev, "Failed to request supplies: %d\n", ret); | |
f0fba2ad | 438 | return ret; |
1dcf98ff MB |
439 | } |
440 | ||
441 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies), | |
442 | wm8523->supplies); | |
443 | if (ret != 0) { | |
444 | dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); | |
445 | goto err_get; | |
446 | } | |
447 | ||
8d50e447 | 448 | ret = snd_soc_read(codec, WM8523_DEVICE_ID); |
1dcf98ff MB |
449 | if (ret < 0) { |
450 | dev_err(codec->dev, "Failed to read ID register\n"); | |
451 | goto err_enable; | |
452 | } | |
453 | if (ret != wm8523_reg[WM8523_DEVICE_ID]) { | |
454 | dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret); | |
455 | ret = -EINVAL; | |
456 | goto err_enable; | |
457 | } | |
458 | ||
8d50e447 | 459 | ret = snd_soc_read(codec, WM8523_REVISION); |
1dcf98ff MB |
460 | if (ret < 0) { |
461 | dev_err(codec->dev, "Failed to read revision register\n"); | |
462 | goto err_enable; | |
463 | } | |
464 | dev_info(codec->dev, "revision %c\n", | |
465 | (ret & WM8523_CHIP_REV_MASK) + 'A'); | |
466 | ||
467 | ret = wm8523_reset(codec); | |
468 | if (ret < 0) { | |
469 | dev_err(codec->dev, "Failed to issue reset\n"); | |
470 | goto err_enable; | |
471 | } | |
472 | ||
1dcf98ff | 473 | /* Change some default settings - latch VU and enable ZC */ |
beebca31 LPC |
474 | reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU; |
475 | reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC; | |
1dcf98ff MB |
476 | |
477 | wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
478 | ||
479 | /* Bias level configuration will have done an extra enable */ | |
480 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
481 | ||
f0fba2ad LG |
482 | snd_soc_add_controls(codec, wm8523_snd_controls, |
483 | ARRAY_SIZE(wm8523_snd_controls)); | |
484 | wm8523_add_widgets(codec); | |
1dcf98ff MB |
485 | |
486 | return 0; | |
487 | ||
488 | err_enable: | |
489 | regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
490 | err_get: | |
491 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); | |
f0fba2ad | 492 | |
1dcf98ff MB |
493 | return ret; |
494 | } | |
495 | ||
f0fba2ad | 496 | static int wm8523_remove(struct snd_soc_codec *codec) |
1dcf98ff | 497 | { |
f0fba2ad LG |
498 | struct wm8523_priv *wm8523 = snd_soc_codec_get_drvdata(codec); |
499 | ||
500 | wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
1dcf98ff | 501 | regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies); |
f0fba2ad | 502 | return 0; |
1dcf98ff MB |
503 | } |
504 | ||
f0fba2ad LG |
505 | static struct snd_soc_codec_driver soc_codec_dev_wm8523 = { |
506 | .probe = wm8523_probe, | |
507 | .remove = wm8523_remove, | |
508 | .suspend = wm8523_suspend, | |
509 | .resume = wm8523_resume, | |
510 | .set_bias_level = wm8523_set_bias_level, | |
511 | .reg_cache_size = WM8523_REGISTER_COUNT, | |
512 | .reg_word_size = sizeof(u16), | |
513 | .reg_cache_default = wm8523_reg, | |
514 | .volatile_register = wm8523_volatile_register, | |
515 | }; | |
516 | ||
1dcf98ff MB |
517 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
518 | static __devinit int wm8523_i2c_probe(struct i2c_client *i2c, | |
519 | const struct i2c_device_id *id) | |
520 | { | |
521 | struct wm8523_priv *wm8523; | |
f0fba2ad | 522 | int ret; |
1dcf98ff MB |
523 | |
524 | wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL); | |
525 | if (wm8523 == NULL) | |
526 | return -ENOMEM; | |
527 | ||
1dcf98ff | 528 | i2c_set_clientdata(i2c, wm8523); |
f0fba2ad | 529 | wm8523->control_type = SND_SOC_I2C; |
1dcf98ff | 530 | |
f0fba2ad LG |
531 | ret = snd_soc_register_codec(&i2c->dev, |
532 | &soc_codec_dev_wm8523, &wm8523_dai, 1); | |
533 | if (ret < 0) | |
534 | kfree(wm8523); | |
535 | return ret; | |
1dcf98ff | 536 | |
1dcf98ff MB |
537 | } |
538 | ||
539 | static __devexit int wm8523_i2c_remove(struct i2c_client *client) | |
540 | { | |
f0fba2ad LG |
541 | snd_soc_unregister_codec(&client->dev); |
542 | kfree(i2c_get_clientdata(client)); | |
1dcf98ff MB |
543 | return 0; |
544 | } | |
545 | ||
1dcf98ff MB |
546 | static const struct i2c_device_id wm8523_i2c_id[] = { |
547 | { "wm8523", 0 }, | |
548 | { } | |
549 | }; | |
550 | MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id); | |
551 | ||
552 | static struct i2c_driver wm8523_i2c_driver = { | |
553 | .driver = { | |
f0fba2ad | 554 | .name = "wm8523-codec", |
1dcf98ff MB |
555 | .owner = THIS_MODULE, |
556 | }, | |
557 | .probe = wm8523_i2c_probe, | |
558 | .remove = __devexit_p(wm8523_i2c_remove), | |
1dcf98ff MB |
559 | .id_table = wm8523_i2c_id, |
560 | }; | |
561 | #endif | |
562 | ||
563 | static int __init wm8523_modinit(void) | |
564 | { | |
565 | int ret; | |
566 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
567 | ret = i2c_add_driver(&wm8523_i2c_driver); | |
568 | if (ret != 0) { | |
569 | printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n", | |
570 | ret); | |
571 | } | |
572 | #endif | |
573 | return 0; | |
574 | } | |
575 | module_init(wm8523_modinit); | |
576 | ||
577 | static void __exit wm8523_exit(void) | |
578 | { | |
579 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
580 | i2c_del_driver(&wm8523_i2c_driver); | |
581 | #endif | |
582 | } | |
583 | module_exit(wm8523_exit); | |
584 | ||
585 | MODULE_DESCRIPTION("ASoC WM8523 driver"); | |
586 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
587 | MODULE_LICENSE("GPL"); |