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1 | /* |
2 | * wm8960.c -- WM8960 ALSA SoC Audio driver | |
3 | * | |
4 | * Author: Liam Girdwood | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/moduleparam.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/pm.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <sound/core.h> | |
19 | #include <sound/pcm.h> | |
20 | #include <sound/pcm_params.h> | |
21 | #include <sound/soc.h> | |
22 | #include <sound/soc-dapm.h> | |
23 | #include <sound/initval.h> | |
24 | #include <sound/tlv.h> | |
25 | ||
26 | #include "wm8960.h" | |
27 | ||
28 | #define AUDIO_NAME "wm8960" | |
29 | ||
30 | struct snd_soc_codec_device soc_codec_dev_wm8960; | |
31 | ||
32 | /* R25 - Power 1 */ | |
33 | #define WM8960_VREF 0x40 | |
34 | ||
35 | /* R28 - Anti-pop 1 */ | |
36 | #define WM8960_POBCTRL 0x80 | |
37 | #define WM8960_BUFDCOPEN 0x10 | |
38 | #define WM8960_BUFIOEN 0x08 | |
39 | #define WM8960_SOFT_ST 0x04 | |
40 | #define WM8960_HPSTBY 0x01 | |
41 | ||
42 | /* R29 - Anti-pop 2 */ | |
43 | #define WM8960_DISOP 0x40 | |
44 | ||
45 | /* | |
46 | * wm8960 register cache | |
47 | * We can't read the WM8960 register space when we are | |
48 | * using 2 wire for device control, so we cache them instead. | |
49 | */ | |
50 | static const u16 wm8960_reg[WM8960_CACHEREGNUM] = { | |
51 | 0x0097, 0x0097, 0x0000, 0x0000, | |
52 | 0x0000, 0x0008, 0x0000, 0x000a, | |
53 | 0x01c0, 0x0000, 0x00ff, 0x00ff, | |
54 | 0x0000, 0x0000, 0x0000, 0x0000, | |
55 | 0x0000, 0x007b, 0x0100, 0x0032, | |
56 | 0x0000, 0x00c3, 0x00c3, 0x01c0, | |
57 | 0x0000, 0x0000, 0x0000, 0x0000, | |
58 | 0x0000, 0x0000, 0x0000, 0x0000, | |
59 | 0x0100, 0x0100, 0x0050, 0x0050, | |
60 | 0x0050, 0x0050, 0x0000, 0x0000, | |
61 | 0x0000, 0x0000, 0x0040, 0x0000, | |
62 | 0x0000, 0x0050, 0x0050, 0x0000, | |
63 | 0x0002, 0x0037, 0x004d, 0x0080, | |
64 | 0x0008, 0x0031, 0x0026, 0x00e9, | |
65 | }; | |
66 | ||
67 | struct wm8960_priv { | |
68 | u16 reg_cache[WM8960_CACHEREGNUM]; | |
69 | struct snd_soc_codec codec; | |
70 | }; | |
71 | ||
72 | /* | |
73 | * read wm8960 register cache | |
74 | */ | |
75 | static inline unsigned int wm8960_read_reg_cache(struct snd_soc_codec *codec, | |
76 | unsigned int reg) | |
77 | { | |
78 | u16 *cache = codec->reg_cache; | |
79 | if (reg == WM8960_RESET) | |
80 | return 0; | |
81 | if (reg >= WM8960_CACHEREGNUM) | |
82 | return -1; | |
83 | return cache[reg]; | |
84 | } | |
85 | ||
86 | /* | |
87 | * write wm8960 register cache | |
88 | */ | |
89 | static inline void wm8960_write_reg_cache(struct snd_soc_codec *codec, | |
90 | u16 reg, unsigned int value) | |
91 | { | |
92 | u16 *cache = codec->reg_cache; | |
93 | if (reg >= WM8960_CACHEREGNUM) | |
94 | return; | |
95 | cache[reg] = value; | |
96 | } | |
97 | ||
98 | static inline unsigned int wm8960_read(struct snd_soc_codec *codec, | |
99 | unsigned int reg) | |
100 | { | |
101 | return wm8960_read_reg_cache(codec, reg); | |
102 | } | |
103 | ||
104 | /* | |
105 | * write to the WM8960 register space | |
106 | */ | |
107 | static int wm8960_write(struct snd_soc_codec *codec, unsigned int reg, | |
108 | unsigned int value) | |
109 | { | |
110 | u8 data[2]; | |
111 | ||
112 | /* data is | |
113 | * D15..D9 WM8960 register offset | |
114 | * D8...D0 register data | |
115 | */ | |
116 | data[0] = (reg << 1) | ((value >> 8) & 0x0001); | |
117 | data[1] = value & 0x00ff; | |
118 | ||
119 | wm8960_write_reg_cache(codec, reg, value); | |
120 | if (codec->hw_write(codec->control_data, data, 2) == 2) | |
121 | return 0; | |
122 | else | |
123 | return -EIO; | |
124 | } | |
125 | ||
126 | #define wm8960_reset(c) wm8960_write(c, WM8960_RESET, 0) | |
127 | ||
128 | /* enumerated controls */ | |
129 | static const char *wm8960_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"}; | |
130 | static const char *wm8960_polarity[] = {"No Inversion", "Left Inverted", | |
131 | "Right Inverted", "Stereo Inversion"}; | |
132 | static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"}; | |
133 | static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"}; | |
134 | static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"}; | |
135 | static const char *wm8960_alcmode[] = {"ALC", "Limiter"}; | |
136 | ||
137 | static const struct soc_enum wm8960_enum[] = { | |
138 | SOC_ENUM_SINGLE(WM8960_DACCTL1, 1, 4, wm8960_deemph), | |
139 | SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity), | |
140 | SOC_ENUM_SINGLE(WM8960_DACCTL2, 5, 4, wm8960_polarity), | |
141 | SOC_ENUM_SINGLE(WM8960_3D, 6, 2, wm8960_3d_upper_cutoff), | |
142 | SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff), | |
143 | SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc), | |
144 | SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode), | |
145 | }; | |
146 | ||
147 | static const DECLARE_TLV_DB_SCALE(adc_tlv, -9700, 50, 0); | |
148 | static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 50, 1); | |
149 | static const DECLARE_TLV_DB_SCALE(bypass_tlv, -2100, 300, 0); | |
150 | static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); | |
151 | ||
152 | static const struct snd_kcontrol_new wm8960_snd_controls[] = { | |
153 | SOC_DOUBLE_R_TLV("Capture Volume", WM8960_LINVOL, WM8960_RINVOL, | |
154 | 0, 63, 0, adc_tlv), | |
155 | SOC_DOUBLE_R("Capture Volume ZC Switch", WM8960_LINVOL, WM8960_RINVOL, | |
156 | 6, 1, 0), | |
157 | SOC_DOUBLE_R("Capture Switch", WM8960_LINVOL, WM8960_RINVOL, | |
158 | 7, 1, 0), | |
159 | ||
160 | SOC_DOUBLE_R_TLV("Playback Volume", WM8960_LDAC, WM8960_RDAC, | |
161 | 0, 255, 0, dac_tlv), | |
162 | ||
163 | SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8960_LOUT1, WM8960_ROUT1, | |
164 | 0, 127, 0, out_tlv), | |
165 | SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8960_LOUT1, WM8960_ROUT1, | |
166 | 7, 1, 0), | |
167 | ||
168 | SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8960_LOUT2, WM8960_ROUT2, | |
169 | 0, 127, 0, out_tlv), | |
170 | SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8960_LOUT2, WM8960_ROUT2, | |
171 | 7, 1, 0), | |
172 | SOC_SINGLE("Speaker DC Volume", WM8960_CLASSD3, 3, 5, 0), | |
173 | SOC_SINGLE("Speaker AC Volume", WM8960_CLASSD3, 0, 5, 0), | |
174 | ||
175 | SOC_SINGLE("PCM Playback -6dB Switch", WM8960_DACCTL1, 7, 1, 0), | |
176 | SOC_ENUM("ADC Polarity", wm8960_enum[1]), | |
177 | SOC_ENUM("Playback De-emphasis", wm8960_enum[0]), | |
178 | SOC_SINGLE("ADC High Pass Filter Switch", WM8960_DACCTL1, 0, 1, 0), | |
179 | ||
180 | SOC_ENUM("DAC Polarity", wm8960_enum[2]), | |
181 | ||
182 | SOC_ENUM("3D Filter Upper Cut-Off", wm8960_enum[3]), | |
183 | SOC_ENUM("3D Filter Lower Cut-Off", wm8960_enum[4]), | |
184 | SOC_SINGLE("3D Volume", WM8960_3D, 1, 15, 0), | |
185 | SOC_SINGLE("3D Switch", WM8960_3D, 0, 1, 0), | |
186 | ||
187 | SOC_ENUM("ALC Function", wm8960_enum[5]), | |
188 | SOC_SINGLE("ALC Max Gain", WM8960_ALC1, 4, 7, 0), | |
189 | SOC_SINGLE("ALC Target", WM8960_ALC1, 0, 15, 1), | |
190 | SOC_SINGLE("ALC Min Gain", WM8960_ALC2, 4, 7, 0), | |
191 | SOC_SINGLE("ALC Hold Time", WM8960_ALC2, 0, 15, 0), | |
192 | SOC_ENUM("ALC Mode", wm8960_enum[6]), | |
193 | SOC_SINGLE("ALC Decay", WM8960_ALC3, 4, 15, 0), | |
194 | SOC_SINGLE("ALC Attack", WM8960_ALC3, 0, 15, 0), | |
195 | ||
196 | SOC_SINGLE("Noise Gate Threshold", WM8960_NOISEG, 3, 31, 0), | |
197 | SOC_SINGLE("Noise Gate Switch", WM8960_NOISEG, 0, 1, 0), | |
198 | ||
199 | SOC_DOUBLE_R("ADC PCM Capture Volume", WM8960_LINPATH, WM8960_RINPATH, | |
200 | 0, 127, 0), | |
201 | ||
202 | SOC_SINGLE_TLV("Left Output Mixer Boost Bypass Volume", | |
203 | WM8960_BYPASS1, 4, 7, 1, bypass_tlv), | |
204 | SOC_SINGLE_TLV("Left Output Mixer LINPUT3 Volume", | |
205 | WM8960_LOUTMIX, 4, 7, 1, bypass_tlv), | |
206 | SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume", | |
207 | WM8960_BYPASS2, 4, 7, 1, bypass_tlv), | |
208 | SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume", | |
209 | WM8960_ROUTMIX, 4, 7, 1, bypass_tlv), | |
210 | }; | |
211 | ||
212 | static const struct snd_kcontrol_new wm8960_lin_boost[] = { | |
213 | SOC_DAPM_SINGLE("LINPUT2 Switch", WM8960_LINPATH, 6, 1, 0), | |
214 | SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LINPATH, 7, 1, 0), | |
215 | SOC_DAPM_SINGLE("LINPUT1 Switch", WM8960_LINPATH, 8, 1, 0), | |
216 | }; | |
217 | ||
218 | static const struct snd_kcontrol_new wm8960_lin[] = { | |
219 | SOC_DAPM_SINGLE("Boost Switch", WM8960_LINPATH, 3, 1, 0), | |
220 | }; | |
221 | ||
222 | static const struct snd_kcontrol_new wm8960_rin_boost[] = { | |
223 | SOC_DAPM_SINGLE("RINPUT2 Switch", WM8960_RINPATH, 6, 1, 0), | |
224 | SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_RINPATH, 7, 1, 0), | |
225 | SOC_DAPM_SINGLE("RINPUT1 Switch", WM8960_RINPATH, 8, 1, 0), | |
226 | }; | |
227 | ||
228 | static const struct snd_kcontrol_new wm8960_rin[] = { | |
229 | SOC_DAPM_SINGLE("Boost Switch", WM8960_RINPATH, 3, 1, 0), | |
230 | }; | |
231 | ||
232 | static const struct snd_kcontrol_new wm8960_loutput_mixer[] = { | |
233 | SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_LOUTMIX, 8, 1, 0), | |
234 | SOC_DAPM_SINGLE("LINPUT3 Switch", WM8960_LOUTMIX, 7, 1, 0), | |
235 | SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS1, 7, 1, 0), | |
236 | }; | |
237 | ||
238 | static const struct snd_kcontrol_new wm8960_routput_mixer[] = { | |
239 | SOC_DAPM_SINGLE("PCM Playback Switch", WM8960_ROUTMIX, 8, 1, 0), | |
240 | SOC_DAPM_SINGLE("RINPUT3 Switch", WM8960_ROUTMIX, 7, 1, 0), | |
241 | SOC_DAPM_SINGLE("Boost Bypass Switch", WM8960_BYPASS2, 7, 1, 0), | |
242 | }; | |
243 | ||
244 | static const struct snd_kcontrol_new wm8960_mono_out[] = { | |
245 | SOC_DAPM_SINGLE("Left Switch", WM8960_MONOMIX1, 7, 1, 0), | |
246 | SOC_DAPM_SINGLE("Right Switch", WM8960_MONOMIX2, 7, 1, 0), | |
247 | }; | |
248 | ||
249 | static const struct snd_soc_dapm_widget wm8960_dapm_widgets[] = { | |
250 | SND_SOC_DAPM_INPUT("LINPUT1"), | |
251 | SND_SOC_DAPM_INPUT("RINPUT1"), | |
252 | SND_SOC_DAPM_INPUT("LINPUT2"), | |
253 | SND_SOC_DAPM_INPUT("RINPUT2"), | |
254 | SND_SOC_DAPM_INPUT("LINPUT3"), | |
255 | SND_SOC_DAPM_INPUT("RINPUT3"), | |
256 | ||
257 | SND_SOC_DAPM_MICBIAS("MICB", WM8960_POWER1, 1, 0), | |
258 | ||
259 | SND_SOC_DAPM_MIXER("Left Boost Mixer", WM8960_POWER1, 5, 0, | |
260 | wm8960_lin_boost, ARRAY_SIZE(wm8960_lin_boost)), | |
261 | SND_SOC_DAPM_MIXER("Right Boost Mixer", WM8960_POWER1, 4, 0, | |
262 | wm8960_rin_boost, ARRAY_SIZE(wm8960_rin_boost)), | |
263 | ||
264 | SND_SOC_DAPM_MIXER("Left Input Mixer", WM8960_POWER3, 5, 0, | |
265 | wm8960_lin, ARRAY_SIZE(wm8960_lin)), | |
266 | SND_SOC_DAPM_MIXER("Right Input Mixer", WM8960_POWER3, 4, 0, | |
267 | wm8960_rin, ARRAY_SIZE(wm8960_rin)), | |
268 | ||
269 | SND_SOC_DAPM_ADC("Left ADC", "Capture", WM8960_POWER2, 3, 0), | |
270 | SND_SOC_DAPM_ADC("Right ADC", "Capture", WM8960_POWER2, 2, 0), | |
271 | ||
272 | SND_SOC_DAPM_DAC("Left DAC", "Playback", WM8960_POWER2, 8, 0), | |
273 | SND_SOC_DAPM_DAC("Right DAC", "Playback", WM8960_POWER2, 7, 0), | |
274 | ||
275 | SND_SOC_DAPM_MIXER("Left Output Mixer", WM8960_POWER3, 3, 0, | |
276 | &wm8960_loutput_mixer[0], | |
277 | ARRAY_SIZE(wm8960_loutput_mixer)), | |
278 | SND_SOC_DAPM_MIXER("Right Output Mixer", WM8960_POWER3, 2, 0, | |
279 | &wm8960_routput_mixer[0], | |
280 | ARRAY_SIZE(wm8960_routput_mixer)), | |
281 | ||
282 | SND_SOC_DAPM_MIXER("Mono Output Mixer", WM8960_POWER2, 1, 0, | |
283 | &wm8960_mono_out[0], | |
284 | ARRAY_SIZE(wm8960_mono_out)), | |
285 | ||
286 | SND_SOC_DAPM_PGA("LOUT1 PGA", WM8960_POWER2, 6, 0, NULL, 0), | |
287 | SND_SOC_DAPM_PGA("ROUT1 PGA", WM8960_POWER2, 5, 0, NULL, 0), | |
288 | ||
289 | SND_SOC_DAPM_PGA("Left Speaker PGA", WM8960_POWER2, 4, 0, NULL, 0), | |
290 | SND_SOC_DAPM_PGA("Right Speaker PGA", WM8960_POWER2, 3, 0, NULL, 0), | |
291 | ||
292 | SND_SOC_DAPM_PGA("Right Speaker Output", WM8960_CLASSD1, 7, 0, NULL, 0), | |
293 | SND_SOC_DAPM_PGA("Left Speaker Output", WM8960_CLASSD1, 6, 0, NULL, 0), | |
294 | ||
295 | SND_SOC_DAPM_OUTPUT("SPK_LP"), | |
296 | SND_SOC_DAPM_OUTPUT("SPK_LN"), | |
297 | SND_SOC_DAPM_OUTPUT("HP_L"), | |
298 | SND_SOC_DAPM_OUTPUT("HP_R"), | |
299 | SND_SOC_DAPM_OUTPUT("SPK_RP"), | |
300 | SND_SOC_DAPM_OUTPUT("SPK_RN"), | |
301 | SND_SOC_DAPM_OUTPUT("OUT3"), | |
302 | }; | |
303 | ||
304 | static const struct snd_soc_dapm_route audio_paths[] = { | |
305 | { "Left Boost Mixer", "LINPUT1 Switch", "LINPUT1" }, | |
306 | { "Left Boost Mixer", "LINPUT2 Switch", "LINPUT2" }, | |
307 | { "Left Boost Mixer", "LINPUT3 Switch", "LINPUT3" }, | |
308 | ||
309 | { "Left Input Mixer", "Boost Switch", "Left Boost Mixer", }, | |
310 | { "Left Input Mixer", NULL, "LINPUT1", }, /* Really Boost Switch */ | |
311 | { "Left Input Mixer", NULL, "LINPUT2" }, | |
312 | { "Left Input Mixer", NULL, "LINPUT3" }, | |
313 | ||
314 | { "Right Boost Mixer", "RINPUT1 Switch", "RINPUT1" }, | |
315 | { "Right Boost Mixer", "RINPUT2 Switch", "RINPUT2" }, | |
316 | { "Right Boost Mixer", "RINPUT3 Switch", "RINPUT3" }, | |
317 | ||
318 | { "Right Input Mixer", "Boost Switch", "Right Boost Mixer", }, | |
319 | { "Right Input Mixer", NULL, "RINPUT1", }, /* Really Boost Switch */ | |
320 | { "Right Input Mixer", NULL, "RINPUT2" }, | |
321 | { "Right Input Mixer", NULL, "LINPUT3" }, | |
322 | ||
323 | { "Left ADC", NULL, "Left Input Mixer" }, | |
324 | { "Right ADC", NULL, "Right Input Mixer" }, | |
325 | ||
326 | { "Left Output Mixer", "LINPUT3 Switch", "LINPUT3" }, | |
327 | { "Left Output Mixer", "Boost Bypass Switch", "Left Boost Mixer"} , | |
328 | { "Left Output Mixer", "PCM Playback Switch", "Left DAC" }, | |
329 | ||
330 | { "Right Output Mixer", "RINPUT3 Switch", "RINPUT3" }, | |
331 | { "Right Output Mixer", "Boost Bypass Switch", "Right Boost Mixer" } , | |
332 | { "Right Output Mixer", "PCM Playback Switch", "Right DAC" }, | |
333 | ||
334 | { "Mono Output Mixer", "Left Switch", "Left Output Mixer" }, | |
335 | { "Mono Output Mixer", "Right Switch", "Right Output Mixer" }, | |
336 | ||
337 | { "LOUT1 PGA", NULL, "Left Output Mixer" }, | |
338 | { "ROUT1 PGA", NULL, "Right Output Mixer" }, | |
339 | ||
340 | { "HP_L", NULL, "LOUT1 PGA" }, | |
341 | { "HP_R", NULL, "ROUT1 PGA" }, | |
342 | ||
343 | { "Left Speaker PGA", NULL, "Left Output Mixer" }, | |
344 | { "Right Speaker PGA", NULL, "Right Output Mixer" }, | |
345 | ||
346 | { "Left Speaker Output", NULL, "Left Speaker PGA" }, | |
347 | { "Right Speaker Output", NULL, "Right Speaker PGA" }, | |
348 | ||
349 | { "SPK_LN", NULL, "Left Speaker Output" }, | |
350 | { "SPK_LP", NULL, "Left Speaker Output" }, | |
351 | { "SPK_RN", NULL, "Right Speaker Output" }, | |
352 | { "SPK_RP", NULL, "Right Speaker Output" }, | |
353 | ||
354 | { "OUT3", NULL, "Mono Output Mixer", } | |
355 | }; | |
356 | ||
357 | static int wm8960_add_widgets(struct snd_soc_codec *codec) | |
358 | { | |
359 | snd_soc_dapm_new_controls(codec, wm8960_dapm_widgets, | |
360 | ARRAY_SIZE(wm8960_dapm_widgets)); | |
361 | ||
362 | snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); | |
363 | ||
364 | snd_soc_dapm_new_widgets(codec); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | static int wm8960_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
369 | unsigned int fmt) | |
370 | { | |
371 | struct snd_soc_codec *codec = codec_dai->codec; | |
372 | u16 iface = 0; | |
373 | ||
374 | /* set master/slave audio interface */ | |
375 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
376 | case SND_SOC_DAIFMT_CBM_CFM: | |
377 | iface |= 0x0040; | |
378 | break; | |
379 | case SND_SOC_DAIFMT_CBS_CFS: | |
380 | break; | |
381 | default: | |
382 | return -EINVAL; | |
383 | } | |
384 | ||
385 | /* interface format */ | |
386 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
387 | case SND_SOC_DAIFMT_I2S: | |
388 | iface |= 0x0002; | |
389 | break; | |
390 | case SND_SOC_DAIFMT_RIGHT_J: | |
391 | break; | |
392 | case SND_SOC_DAIFMT_LEFT_J: | |
393 | iface |= 0x0001; | |
394 | break; | |
395 | case SND_SOC_DAIFMT_DSP_A: | |
396 | iface |= 0x0003; | |
397 | break; | |
398 | case SND_SOC_DAIFMT_DSP_B: | |
399 | iface |= 0x0013; | |
400 | break; | |
401 | default: | |
402 | return -EINVAL; | |
403 | } | |
404 | ||
405 | /* clock inversion */ | |
406 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
407 | case SND_SOC_DAIFMT_NB_NF: | |
408 | break; | |
409 | case SND_SOC_DAIFMT_IB_IF: | |
410 | iface |= 0x0090; | |
411 | break; | |
412 | case SND_SOC_DAIFMT_IB_NF: | |
413 | iface |= 0x0080; | |
414 | break; | |
415 | case SND_SOC_DAIFMT_NB_IF: | |
416 | iface |= 0x0010; | |
417 | break; | |
418 | default: | |
419 | return -EINVAL; | |
420 | } | |
421 | ||
422 | /* set iface */ | |
423 | wm8960_write(codec, WM8960_IFACE1, iface); | |
424 | return 0; | |
425 | } | |
426 | ||
427 | static int wm8960_hw_params(struct snd_pcm_substream *substream, | |
428 | struct snd_pcm_hw_params *params, | |
429 | struct snd_soc_dai *dai) | |
430 | { | |
431 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
432 | struct snd_soc_device *socdev = rtd->socdev; | |
433 | struct snd_soc_codec *codec = socdev->card->codec; | |
434 | u16 iface = wm8960_read(codec, WM8960_IFACE1) & 0xfff3; | |
435 | ||
436 | /* bit size */ | |
437 | switch (params_format(params)) { | |
438 | case SNDRV_PCM_FORMAT_S16_LE: | |
439 | break; | |
440 | case SNDRV_PCM_FORMAT_S20_3LE: | |
441 | iface |= 0x0004; | |
442 | break; | |
443 | case SNDRV_PCM_FORMAT_S24_LE: | |
444 | iface |= 0x0008; | |
445 | break; | |
446 | } | |
447 | ||
448 | /* set iface */ | |
449 | wm8960_write(codec, WM8960_IFACE1, iface); | |
450 | return 0; | |
451 | } | |
452 | ||
453 | static int wm8960_mute(struct snd_soc_dai *dai, int mute) | |
454 | { | |
455 | struct snd_soc_codec *codec = dai->codec; | |
456 | u16 mute_reg = wm8960_read(codec, WM8960_DACCTL1) & 0xfff7; | |
457 | ||
458 | if (mute) | |
459 | wm8960_write(codec, WM8960_DACCTL1, mute_reg | 0x8); | |
460 | else | |
461 | wm8960_write(codec, WM8960_DACCTL1, mute_reg); | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static int wm8960_set_bias_level(struct snd_soc_codec *codec, | |
466 | enum snd_soc_bias_level level) | |
467 | { | |
468 | struct wm8960_data *pdata = codec->dev->platform_data; | |
469 | u16 reg; | |
470 | ||
471 | switch (level) { | |
472 | case SND_SOC_BIAS_ON: | |
473 | break; | |
474 | ||
475 | case SND_SOC_BIAS_PREPARE: | |
476 | /* Set VMID to 2x50k */ | |
477 | reg = wm8960_read(codec, WM8960_POWER1); | |
478 | reg &= ~0x180; | |
479 | reg |= 0x80; | |
480 | wm8960_write(codec, WM8960_POWER1, reg); | |
481 | break; | |
482 | ||
483 | case SND_SOC_BIAS_STANDBY: | |
484 | if (codec->bias_level == SND_SOC_BIAS_OFF) { | |
485 | /* Enable anti-pop features */ | |
486 | wm8960_write(codec, WM8960_APOP1, | |
487 | WM8960_POBCTRL | WM8960_SOFT_ST | | |
488 | WM8960_BUFDCOPEN | WM8960_BUFIOEN); | |
489 | ||
490 | /* Discharge HP output */ | |
491 | reg = WM8960_DISOP; | |
492 | if (pdata) | |
493 | reg |= pdata->dres << 4; | |
494 | wm8960_write(codec, WM8960_APOP2, reg); | |
495 | ||
496 | msleep(400); | |
497 | ||
498 | wm8960_write(codec, WM8960_APOP2, 0); | |
499 | ||
500 | /* Enable & ramp VMID at 2x50k */ | |
501 | reg = wm8960_read(codec, WM8960_POWER1); | |
502 | reg |= 0x80; | |
503 | wm8960_write(codec, WM8960_POWER1, reg); | |
504 | msleep(100); | |
505 | ||
506 | /* Enable VREF */ | |
507 | wm8960_write(codec, WM8960_POWER1, reg | WM8960_VREF); | |
508 | ||
509 | /* Disable anti-pop features */ | |
510 | wm8960_write(codec, WM8960_APOP1, WM8960_BUFIOEN); | |
511 | } | |
512 | ||
513 | /* Set VMID to 2x250k */ | |
514 | reg = wm8960_read(codec, WM8960_POWER1); | |
515 | reg &= ~0x180; | |
516 | reg |= 0x100; | |
517 | wm8960_write(codec, WM8960_POWER1, reg); | |
518 | break; | |
519 | ||
520 | case SND_SOC_BIAS_OFF: | |
521 | /* Enable anti-pop features */ | |
522 | wm8960_write(codec, WM8960_APOP1, | |
523 | WM8960_POBCTRL | WM8960_SOFT_ST | | |
524 | WM8960_BUFDCOPEN | WM8960_BUFIOEN); | |
525 | ||
526 | /* Disable VMID and VREF, let them discharge */ | |
527 | wm8960_write(codec, WM8960_POWER1, 0); | |
528 | msleep(600); | |
529 | ||
530 | wm8960_write(codec, WM8960_APOP1, 0); | |
531 | break; | |
532 | } | |
533 | ||
534 | codec->bias_level = level; | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | /* PLL divisors */ | |
540 | struct _pll_div { | |
541 | u32 pre_div:1; | |
542 | u32 n:4; | |
543 | u32 k:24; | |
544 | }; | |
545 | ||
546 | /* The size in bits of the pll divide multiplied by 10 | |
547 | * to allow rounding later */ | |
548 | #define FIXED_PLL_SIZE ((1 << 24) * 10) | |
549 | ||
550 | static int pll_factors(unsigned int source, unsigned int target, | |
551 | struct _pll_div *pll_div) | |
552 | { | |
553 | unsigned long long Kpart; | |
554 | unsigned int K, Ndiv, Nmod; | |
555 | ||
556 | pr_debug("WM8960 PLL: setting %dHz->%dHz\n", source, target); | |
557 | ||
558 | /* Scale up target to PLL operating frequency */ | |
559 | target *= 4; | |
560 | ||
561 | Ndiv = target / source; | |
562 | if (Ndiv < 6) { | |
563 | source >>= 1; | |
564 | pll_div->pre_div = 1; | |
565 | Ndiv = target / source; | |
566 | } else | |
567 | pll_div->pre_div = 0; | |
568 | ||
569 | if ((Ndiv < 6) || (Ndiv > 12)) { | |
570 | pr_err("WM8960 PLL: Unsupported N=%d\n", Ndiv); | |
571 | return -EINVAL; | |
572 | } | |
573 | ||
574 | pll_div->n = Ndiv; | |
575 | Nmod = target % source; | |
576 | Kpart = FIXED_PLL_SIZE * (long long)Nmod; | |
577 | ||
578 | do_div(Kpart, source); | |
579 | ||
580 | K = Kpart & 0xFFFFFFFF; | |
581 | ||
582 | /* Check if we need to round */ | |
583 | if ((K % 10) >= 5) | |
584 | K += 5; | |
585 | ||
586 | /* Move down to proper range now rounding is done */ | |
587 | K /= 10; | |
588 | ||
589 | pll_div->k = K; | |
590 | ||
591 | pr_debug("WM8960 PLL: N=%x K=%x pre_div=%d\n", | |
592 | pll_div->n, pll_div->k, pll_div->pre_div); | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | static int wm8960_set_dai_pll(struct snd_soc_dai *codec_dai, | |
598 | int pll_id, unsigned int freq_in, unsigned int freq_out) | |
599 | { | |
600 | struct snd_soc_codec *codec = codec_dai->codec; | |
601 | u16 reg; | |
602 | static struct _pll_div pll_div; | |
603 | int ret; | |
604 | ||
605 | if (freq_in && freq_out) { | |
606 | ret = pll_factors(freq_in, freq_out, &pll_div); | |
607 | if (ret != 0) | |
608 | return ret; | |
609 | } | |
610 | ||
611 | /* Disable the PLL: even if we are changing the frequency the | |
612 | * PLL needs to be disabled while we do so. */ | |
613 | wm8960_write(codec, WM8960_CLOCK1, | |
614 | wm8960_read(codec, WM8960_CLOCK1) & ~1); | |
615 | wm8960_write(codec, WM8960_POWER2, | |
616 | wm8960_read(codec, WM8960_POWER2) & ~1); | |
617 | ||
618 | if (!freq_in || !freq_out) | |
619 | return 0; | |
620 | ||
621 | reg = wm8960_read(codec, WM8960_PLL1) & ~0x3f; | |
622 | reg |= pll_div.pre_div << 4; | |
623 | reg |= pll_div.n; | |
624 | ||
625 | if (pll_div.k) { | |
626 | reg |= 0x20; | |
627 | ||
628 | wm8960_write(codec, WM8960_PLL2, (pll_div.k >> 18) & 0x3f); | |
629 | wm8960_write(codec, WM8960_PLL3, (pll_div.k >> 9) & 0x1ff); | |
630 | wm8960_write(codec, WM8960_PLL4, pll_div.k & 0x1ff); | |
631 | } | |
632 | wm8960_write(codec, WM8960_PLL1, reg); | |
633 | ||
634 | /* Turn it on */ | |
635 | wm8960_write(codec, WM8960_POWER2, | |
636 | wm8960_read(codec, WM8960_POWER2) | 1); | |
637 | msleep(250); | |
638 | wm8960_write(codec, WM8960_CLOCK1, | |
639 | wm8960_read(codec, WM8960_CLOCK1) | 1); | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | static int wm8960_set_dai_clkdiv(struct snd_soc_dai *codec_dai, | |
645 | int div_id, int div) | |
646 | { | |
647 | struct snd_soc_codec *codec = codec_dai->codec; | |
648 | u16 reg; | |
649 | ||
650 | switch (div_id) { | |
651 | case WM8960_SYSCLKSEL: | |
652 | reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1fe; | |
653 | wm8960_write(codec, WM8960_CLOCK1, reg | div); | |
654 | break; | |
655 | case WM8960_SYSCLKDIV: | |
656 | reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1f9; | |
657 | wm8960_write(codec, WM8960_CLOCK1, reg | div); | |
658 | break; | |
659 | case WM8960_DACDIV: | |
660 | reg = wm8960_read(codec, WM8960_CLOCK1) & 0x1c7; | |
661 | wm8960_write(codec, WM8960_CLOCK1, reg | div); | |
662 | break; | |
663 | case WM8960_OPCLKDIV: | |
664 | reg = wm8960_read(codec, WM8960_PLL1) & 0x03f; | |
665 | wm8960_write(codec, WM8960_PLL1, reg | div); | |
666 | break; | |
667 | case WM8960_DCLKDIV: | |
668 | reg = wm8960_read(codec, WM8960_CLOCK2) & 0x03f; | |
669 | wm8960_write(codec, WM8960_CLOCK2, reg | div); | |
670 | break; | |
671 | case WM8960_TOCLKSEL: | |
672 | reg = wm8960_read(codec, WM8960_ADDCTL1) & 0x1fd; | |
673 | wm8960_write(codec, WM8960_ADDCTL1, reg | div); | |
674 | break; | |
675 | default: | |
676 | return -EINVAL; | |
677 | } | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
682 | #define WM8960_RATES SNDRV_PCM_RATE_8000_48000 | |
683 | ||
684 | #define WM8960_FORMATS \ | |
685 | (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \ | |
686 | SNDRV_PCM_FMTBIT_S24_LE) | |
687 | ||
688 | static struct snd_soc_dai_ops wm8960_dai_ops = { | |
689 | .hw_params = wm8960_hw_params, | |
690 | .digital_mute = wm8960_mute, | |
691 | .set_fmt = wm8960_set_dai_fmt, | |
692 | .set_clkdiv = wm8960_set_dai_clkdiv, | |
693 | .set_pll = wm8960_set_dai_pll, | |
694 | }; | |
695 | ||
696 | struct snd_soc_dai wm8960_dai = { | |
697 | .name = "WM8960", | |
698 | .playback = { | |
699 | .stream_name = "Playback", | |
700 | .channels_min = 1, | |
701 | .channels_max = 2, | |
702 | .rates = WM8960_RATES, | |
703 | .formats = WM8960_FORMATS,}, | |
704 | .capture = { | |
705 | .stream_name = "Capture", | |
706 | .channels_min = 1, | |
707 | .channels_max = 2, | |
708 | .rates = WM8960_RATES, | |
709 | .formats = WM8960_FORMATS,}, | |
710 | .ops = &wm8960_dai_ops, | |
711 | .symmetric_rates = 1, | |
712 | }; | |
713 | EXPORT_SYMBOL_GPL(wm8960_dai); | |
714 | ||
715 | static int wm8960_suspend(struct platform_device *pdev, pm_message_t state) | |
716 | { | |
717 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
718 | struct snd_soc_codec *codec = socdev->card->codec; | |
719 | ||
720 | wm8960_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
721 | return 0; | |
722 | } | |
723 | ||
724 | static int wm8960_resume(struct platform_device *pdev) | |
725 | { | |
726 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
727 | struct snd_soc_codec *codec = socdev->card->codec; | |
728 | int i; | |
729 | u8 data[2]; | |
730 | u16 *cache = codec->reg_cache; | |
731 | ||
732 | /* Sync reg_cache with the hardware */ | |
733 | for (i = 0; i < ARRAY_SIZE(wm8960_reg); i++) { | |
734 | data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); | |
735 | data[1] = cache[i] & 0x00ff; | |
736 | codec->hw_write(codec->control_data, data, 2); | |
737 | } | |
738 | ||
739 | wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
740 | wm8960_set_bias_level(codec, codec->suspend_bias_level); | |
741 | return 0; | |
742 | } | |
743 | ||
744 | static struct snd_soc_codec *wm8960_codec; | |
745 | ||
746 | static int wm8960_probe(struct platform_device *pdev) | |
747 | { | |
748 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
749 | struct snd_soc_codec *codec; | |
750 | int ret = 0; | |
751 | ||
752 | if (wm8960_codec == NULL) { | |
753 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
754 | return -ENODEV; | |
755 | } | |
756 | ||
757 | socdev->card->codec = wm8960_codec; | |
758 | codec = wm8960_codec; | |
759 | ||
760 | /* register pcms */ | |
761 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
762 | if (ret < 0) { | |
763 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
764 | goto pcm_err; | |
765 | } | |
766 | ||
767 | snd_soc_add_controls(codec, wm8960_snd_controls, | |
768 | ARRAY_SIZE(wm8960_snd_controls)); | |
769 | wm8960_add_widgets(codec); | |
770 | ret = snd_soc_init_card(socdev); | |
771 | if (ret < 0) { | |
772 | dev_err(codec->dev, "failed to register card: %d\n", ret); | |
773 | goto card_err; | |
774 | } | |
775 | ||
776 | return ret; | |
777 | ||
778 | card_err: | |
779 | snd_soc_free_pcms(socdev); | |
780 | snd_soc_dapm_free(socdev); | |
781 | pcm_err: | |
782 | return ret; | |
783 | } | |
784 | ||
785 | /* power down chip */ | |
786 | static int wm8960_remove(struct platform_device *pdev) | |
787 | { | |
788 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
789 | ||
790 | snd_soc_free_pcms(socdev); | |
791 | snd_soc_dapm_free(socdev); | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | struct snd_soc_codec_device soc_codec_dev_wm8960 = { | |
797 | .probe = wm8960_probe, | |
798 | .remove = wm8960_remove, | |
799 | .suspend = wm8960_suspend, | |
800 | .resume = wm8960_resume, | |
801 | }; | |
802 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8960); | |
803 | ||
804 | static int wm8960_register(struct wm8960_priv *wm8960) | |
805 | { | |
806 | struct wm8960_data *pdata = wm8960->codec.dev->platform_data; | |
807 | struct snd_soc_codec *codec = &wm8960->codec; | |
808 | int ret; | |
809 | u16 reg; | |
810 | ||
811 | if (wm8960_codec) { | |
812 | dev_err(codec->dev, "Another WM8960 is registered\n"); | |
813 | return -EINVAL; | |
814 | } | |
815 | ||
816 | if (!pdata) { | |
817 | dev_warn(codec->dev, "No platform data supplied\n"); | |
818 | } else { | |
819 | if (pdata->dres > WM8960_DRES_MAX) { | |
820 | dev_err(codec->dev, "Invalid DRES: %d\n", pdata->dres); | |
821 | pdata->dres = 0; | |
822 | } | |
823 | } | |
824 | ||
825 | mutex_init(&codec->mutex); | |
826 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
827 | INIT_LIST_HEAD(&codec->dapm_paths); | |
828 | ||
829 | codec->private_data = wm8960; | |
830 | codec->name = "WM8960"; | |
831 | codec->owner = THIS_MODULE; | |
832 | codec->read = wm8960_read_reg_cache; | |
833 | codec->write = wm8960_write; | |
834 | codec->bias_level = SND_SOC_BIAS_OFF; | |
835 | codec->set_bias_level = wm8960_set_bias_level; | |
836 | codec->dai = &wm8960_dai; | |
837 | codec->num_dai = 1; | |
838 | codec->reg_cache_size = WM8960_CACHEREGNUM; | |
839 | codec->reg_cache = &wm8960->reg_cache; | |
840 | ||
841 | memcpy(codec->reg_cache, wm8960_reg, sizeof(wm8960_reg)); | |
842 | ||
843 | ret = wm8960_reset(codec); | |
844 | if (ret < 0) { | |
845 | dev_err(codec->dev, "Failed to issue reset\n"); | |
846 | return ret; | |
847 | } | |
848 | ||
849 | wm8960_dai.dev = codec->dev; | |
850 | ||
851 | wm8960_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
852 | ||
853 | /* Latch the update bits */ | |
854 | reg = wm8960_read(codec, WM8960_LINVOL); | |
855 | wm8960_write(codec, WM8960_LINVOL, reg | 0x100); | |
856 | reg = wm8960_read(codec, WM8960_RINVOL); | |
857 | wm8960_write(codec, WM8960_RINVOL, reg | 0x100); | |
858 | reg = wm8960_read(codec, WM8960_LADC); | |
859 | wm8960_write(codec, WM8960_LADC, reg | 0x100); | |
860 | reg = wm8960_read(codec, WM8960_RADC); | |
861 | wm8960_write(codec, WM8960_RADC, reg | 0x100); | |
862 | reg = wm8960_read(codec, WM8960_LDAC); | |
863 | wm8960_write(codec, WM8960_LDAC, reg | 0x100); | |
864 | reg = wm8960_read(codec, WM8960_RDAC); | |
865 | wm8960_write(codec, WM8960_RDAC, reg | 0x100); | |
866 | reg = wm8960_read(codec, WM8960_LOUT1); | |
867 | wm8960_write(codec, WM8960_LOUT1, reg | 0x100); | |
868 | reg = wm8960_read(codec, WM8960_ROUT1); | |
869 | wm8960_write(codec, WM8960_ROUT1, reg | 0x100); | |
870 | reg = wm8960_read(codec, WM8960_LOUT2); | |
871 | wm8960_write(codec, WM8960_LOUT2, reg | 0x100); | |
872 | reg = wm8960_read(codec, WM8960_ROUT2); | |
873 | wm8960_write(codec, WM8960_ROUT2, reg | 0x100); | |
874 | ||
875 | wm8960_codec = codec; | |
876 | ||
877 | ret = snd_soc_register_codec(codec); | |
878 | if (ret != 0) { | |
879 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
880 | return ret; | |
881 | } | |
882 | ||
883 | ret = snd_soc_register_dai(&wm8960_dai); | |
884 | if (ret != 0) { | |
885 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
886 | snd_soc_unregister_codec(codec); | |
887 | return ret; | |
888 | } | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
893 | static void wm8960_unregister(struct wm8960_priv *wm8960) | |
894 | { | |
895 | wm8960_set_bias_level(&wm8960->codec, SND_SOC_BIAS_OFF); | |
896 | snd_soc_unregister_dai(&wm8960_dai); | |
897 | snd_soc_unregister_codec(&wm8960->codec); | |
898 | kfree(wm8960); | |
899 | wm8960_codec = NULL; | |
900 | } | |
901 | ||
902 | static __devinit int wm8960_i2c_probe(struct i2c_client *i2c, | |
903 | const struct i2c_device_id *id) | |
904 | { | |
905 | struct wm8960_priv *wm8960; | |
906 | struct snd_soc_codec *codec; | |
907 | ||
908 | wm8960 = kzalloc(sizeof(struct wm8960_priv), GFP_KERNEL); | |
909 | if (wm8960 == NULL) | |
910 | return -ENOMEM; | |
911 | ||
912 | codec = &wm8960->codec; | |
913 | codec->hw_write = (hw_write_t)i2c_master_send; | |
914 | ||
915 | i2c_set_clientdata(i2c, wm8960); | |
916 | codec->control_data = i2c; | |
917 | ||
918 | codec->dev = &i2c->dev; | |
919 | ||
920 | return wm8960_register(wm8960); | |
921 | } | |
922 | ||
923 | static __devexit int wm8960_i2c_remove(struct i2c_client *client) | |
924 | { | |
925 | struct wm8960_priv *wm8960 = i2c_get_clientdata(client); | |
926 | wm8960_unregister(wm8960); | |
927 | return 0; | |
928 | } | |
929 | ||
b3b50b3f MB |
930 | #ifdef CONFIG_PM |
931 | static int wm8960_i2c_suspend(struct i2c_client *client, pm_message_t msg) | |
932 | { | |
933 | return snd_soc_suspend_device(&client->dev); | |
934 | } | |
935 | ||
936 | static int wm8960_i2c_resume(struct i2c_client *client) | |
937 | { | |
938 | return snd_soc_resume_device(&client->dev); | |
939 | } | |
940 | #else | |
941 | #define wm8960_i2c_suspend NULL | |
942 | #define wm8960_i2c_resume NULL | |
943 | #endif | |
944 | ||
f2644a2c MB |
945 | static const struct i2c_device_id wm8960_i2c_id[] = { |
946 | { "wm8960", 0 }, | |
947 | { } | |
948 | }; | |
949 | MODULE_DEVICE_TABLE(i2c, wm8960_i2c_id); | |
950 | ||
951 | static struct i2c_driver wm8960_i2c_driver = { | |
952 | .driver = { | |
953 | .name = "WM8960 I2C Codec", | |
954 | .owner = THIS_MODULE, | |
955 | }, | |
956 | .probe = wm8960_i2c_probe, | |
957 | .remove = __devexit_p(wm8960_i2c_remove), | |
b3b50b3f MB |
958 | .suspend = wm8960_i2c_suspend, |
959 | .resume = wm8960_i2c_resume, | |
f2644a2c MB |
960 | .id_table = wm8960_i2c_id, |
961 | }; | |
962 | ||
963 | static int __init wm8960_modinit(void) | |
964 | { | |
965 | int ret; | |
966 | ||
967 | ret = i2c_add_driver(&wm8960_i2c_driver); | |
968 | if (ret != 0) { | |
969 | printk(KERN_ERR "Failed to register WM8960 I2C driver: %d\n", | |
970 | ret); | |
971 | } | |
972 | ||
973 | return ret; | |
974 | } | |
975 | module_init(wm8960_modinit); | |
976 | ||
977 | static void __exit wm8960_exit(void) | |
978 | { | |
979 | i2c_del_driver(&wm8960_i2c_driver); | |
980 | } | |
981 | module_exit(wm8960_exit); | |
982 | ||
983 | ||
984 | MODULE_DESCRIPTION("ASoC WM8960 driver"); | |
985 | MODULE_AUTHOR("Liam Girdwood"); | |
986 | MODULE_LICENSE("GPL"); |