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Merge branch 'for-2.6.34' into for-2.6.35
[deliverable/linux.git] / sound / soc / codecs / wm8940.c
CommitLineData
0b5e92c5
JC		 1/*
2 * wm8940.c -- WM8940 ALSA Soc Audio driver
3 *
4 * Author: Jonathan Cameron <jic23@cam.ac.uk>
5 *
6 * Based on wm8510.c
7 * Copyright 2006 Wolfson Microelectronics PLC.
8 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * Not currently handled:
15 * Notch filter control
16 * AUXMode (inverting vs mixer)
17 * No means to obtain current gain if alc enabled.
18 * No use made of gpio
19 * Fast VMID discharge for power down
20 * Soft Start
21 * DLR and ALR Swaps not enabled
22 * Digital Sidetone not supported
23 */
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/kernel.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/i2c.h>
31#include <linux/platform_device.h>
32#include <linux/spi/spi.h>
33#include <sound/core.h>
34#include <sound/pcm.h>
35#include <sound/pcm_params.h>
36#include <sound/soc.h>
37#include <sound/soc-dapm.h>
38#include <sound/initval.h>
39#include <sound/tlv.h>
40
41#include "wm8940.h"
42
43struct wm8940_priv {
44 unsigned int sysclk;
45 u16 reg_cache[WM8940_CACHEREGNUM];
46 struct snd_soc_codec codec;
47};
48
49static u16 wm8940_reg_defaults[] = {
50 0x8940, /* Soft Reset */
51 0x0000, /* Power 1 */
52 0x0000, /* Power 2 */
53 0x0000, /* Power 3 */
54 0x0010, /* Interface Control */
55 0x0000, /* Companding Control */
56 0x0140, /* Clock Control */
57 0x0000, /* Additional Controls */
58 0x0000, /* GPIO Control */
59 0x0002, /* Auto Increment Control */
60 0x0000, /* DAC Control */
61 0x00FF, /* DAC Volume */
62 0,
63 0,
64 0x0100, /* ADC Control */
65 0x00FF, /* ADC Volume */
66 0x0000, /* Notch Filter 1 Control 1 */
67 0x0000, /* Notch Filter 1 Control 2 */
68 0x0000, /* Notch Filter 2 Control 1 */
69 0x0000, /* Notch Filter 2 Control 2 */
70 0x0000, /* Notch Filter 3 Control 1 */
71 0x0000, /* Notch Filter 3 Control 2 */
72 0x0000, /* Notch Filter 4 Control 1 */
73 0x0000, /* Notch Filter 4 Control 2 */
74 0x0032, /* DAC Limit Control 1 */
75 0x0000, /* DAC Limit Control 2 */
76 0,
77 0,
78 0,
79 0,
80 0,
81 0,
82 0x0038, /* ALC Control 1 */
83 0x000B, /* ALC Control 2 */
84 0x0032, /* ALC Control 3 */
85 0x0000, /* Noise Gate */
86 0x0041, /* PLLN */
87 0x000C, /* PLLK1 */
88 0x0093, /* PLLK2 */
89 0x00E9, /* PLLK3 */
90 0,
91 0,
92 0x0030, /* ALC Control 4 */
93 0,
94 0x0002, /* Input Control */
95 0x0050, /* PGA Gain */
96 0,
97 0x0002, /* ADC Boost Control */
98 0,
99 0x0002, /* Output Control */
100 0x0000, /* Speaker Mixer Control */
101 0,
102 0,
103 0,
104 0x0079, /* Speaker Volume */
105 0,
106 0x0000, /* Mono Mixer Control */
107};
108
0b5e92c5
JC		 109static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
110static const struct soc_enum wm8940_adc_companding_enum
111= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
112static const struct soc_enum wm8940_dac_companding_enum
113= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
114
115static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
116static const struct soc_enum wm8940_alc_mode_enum
117= SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
118
119static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
120static const struct soc_enum wm8940_mic_bias_level_enum
121= SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
122
123static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
124static const struct soc_enum wm8940_filter_mode_enum
125= SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
126
6be01cfb
MB		 127static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
128static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
129static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
130static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
131static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
132static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
133static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
134static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
135static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
136static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
0b5e92c5
JC		 137
138static const struct snd_kcontrol_new wm8940_snd_controls[] = {
139 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
140 6, 1, 0),
141 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
142 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
143
144 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
145 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
146 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
147 3, 7, 1, wm8940_alc_max_tlv),
148 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
149 0, 7, 0, wm8940_alc_min_tlv),
150 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
151 0, 14, 0, wm8940_alc_tar_tlv),
152 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
153 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
154 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
155 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
156 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
157 3, 1, 0),
158 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
159 0, 7, 0),
160
161 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
162 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
163 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
164 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
165 4, 9, 1, wm8940_lim_thresh_tlv),
166 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
167 0, 12, 0, wm8940_lim_boost_tlv),
168
169 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
170 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
171 0, 63, 0, wm8940_pga_vol_tlv),
172 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
173 0, 255, 0, wm8940_adc_tlv),
174 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
175 0, 255, 0, wm8940_adc_tlv),
176 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
177 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
178 8, 1, 0, wm8940_capture_boost_vol_tlv),
179 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
180 0, 63, 0, wm8940_spk_vol_tlv),
181 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
182
183 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
184 8, 1, 1, wm8940_att_tlv),
185 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
186
187 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
188 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
189 7, 1, 1, wm8940_att_tlv),
190
191 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
192 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
193 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
194 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
195 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
196 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
197 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
198};
199
200static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
201 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
202 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
203 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
204};
205
206static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
207 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
208 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
209 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
210};
211
6be01cfb 212static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
0b5e92c5
JC		 213static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
214 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
215 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
216 0, 7, 0, wm8940_boost_vol_tlv),
217 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
218 4, 7, 0, wm8940_boost_vol_tlv),
219};
220
221static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
222 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
223 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
224 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
225};
226
227static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
228 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
229 &wm8940_speaker_mixer_controls[0],
230 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
231 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
232 &wm8940_mono_mixer_controls[0],
233 ARRAY_SIZE(wm8940_mono_mixer_controls)),
234 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
235
236 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
237 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
238 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
239 SND_SOC_DAPM_OUTPUT("MONOOUT"),
240 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
241 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
242
243 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
244 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
245 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
246 &wm8940_micpga_controls[0],
247 ARRAY_SIZE(wm8940_micpga_controls)),
248 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
249 &wm8940_input_boost_controls[0],
250 ARRAY_SIZE(wm8940_input_boost_controls)),
251 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
252
253 SND_SOC_DAPM_INPUT("MICN"),
254 SND_SOC_DAPM_INPUT("MICP"),
255 SND_SOC_DAPM_INPUT("AUX"),
256};
257
258static const struct snd_soc_dapm_route audio_map[] = {
259 /* Mono output mixer */
260 {"Mono Mixer", "PCM Playback Switch", "DAC"},
261 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
262 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
263
264 /* Speaker output mixer */
265 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
266 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
267 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
268
269 /* Outputs */
270 {"Mono Out", NULL, "Mono Mixer"},
271 {"MONOOUT", NULL, "Mono Out"},
272 {"SpkN Out", NULL, "Speaker Mixer"},
273 {"SpkP Out", NULL, "Speaker Mixer"},
274 {"SPKOUTN", NULL, "SpkN Out"},
275 {"SPKOUTP", NULL, "SpkP Out"},
276
277 /* Microphone PGA */
278 {"Mic PGA", "MICN Switch", "MICN"},
279 {"Mic PGA", "MICP Switch", "MICP"},
280 {"Mic PGA", "AUX Switch", "AUX"},
281
282 /* Boost Mixer */
283 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
284 {"Boost Mixer", "Mic Volume", "MICP"},
285 {"Boost Mixer", "Aux Volume", "Aux Input"},
286
287 {"ADC", NULL, "Boost Mixer"},
288};
289
290static int wm8940_add_widgets(struct snd_soc_codec *codec)
291{
292 int ret;
293
294 ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets,
295 ARRAY_SIZE(wm8940_dapm_widgets));
296 if (ret)
297 goto error_ret;
298 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
299 if (ret)
300 goto error_ret;
0b5e92c5
JC		 301
302error_ret:
303 return ret;
304}
305
8d50e447 306#define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
0b5e92c5
JC		 307
308static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
309 unsigned int fmt)
310{
311 struct snd_soc_codec *codec = codec_dai->codec;
8d50e447
MB		 312 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
313 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
0b5e92c5
JC		 314
315 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
316 case SND_SOC_DAIFMT_CBM_CFM:
317 clk |= 1;
318 break;
319 case SND_SOC_DAIFMT_CBS_CFS:
320 break;
321 default:
322 return -EINVAL;
323 }
8d50e447 324 snd_soc_write(codec, WM8940_CLOCK, clk);
0b5e92c5
JC		 325
326 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
327 case SND_SOC_DAIFMT_I2S:
328 iface |= (2 << 3);
329 break;
330 case SND_SOC_DAIFMT_LEFT_J:
331 iface |= (1 << 3);
332 break;
333 case SND_SOC_DAIFMT_RIGHT_J:
334 break;
335 case SND_SOC_DAIFMT_DSP_A:
336 iface |= (3 << 3);
337 break;
338 case SND_SOC_DAIFMT_DSP_B:
339 iface |= (3 << 3) | (1 << 7);
340 break;
341 }
342
343 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
344 case SND_SOC_DAIFMT_NB_NF:
345 break;
346 case SND_SOC_DAIFMT_NB_IF:
347 iface |= (1 << 7);
348 break;
349 case SND_SOC_DAIFMT_IB_NF:
350 iface |= (1 << 8);
351 break;
352 case SND_SOC_DAIFMT_IB_IF:
353 iface |= (1 << 8) | (1 << 7);
354 break;
355 }
356
8d50e447 357 snd_soc_write(codec, WM8940_IFACE, iface);
0b5e92c5
JC		 358
359 return 0;
360}
361
362static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
363 struct snd_pcm_hw_params *params,
364 struct snd_soc_dai *dai)
365{
366 struct snd_soc_pcm_runtime *rtd = substream->private_data;
367 struct snd_soc_device *socdev = rtd->socdev;
368 struct snd_soc_codec *codec = socdev->card->codec;
8d50e447
MB		 369 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
370 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
371 u16 companding = snd_soc_read(codec,
0b5e92c5
JC		 372 WM8940_COMPANDINGCTL) & 0xFFDF;
373 int ret;
374
375 /* LoutR control */
376 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
377 && params_channels(params) == 2)
378 iface |= (1 << 9);
379
380 switch (params_rate(params)) {
b3172f22 381 case 8000:
0b5e92c5
JC		 382 addcntrl |= (0x5 << 1);
383 break;
b3172f22 384 case 11025:
0b5e92c5
JC		 385 addcntrl |= (0x4 << 1);
386 break;
b3172f22 387 case 16000:
0b5e92c5
JC		 388 addcntrl |= (0x3 << 1);
389 break;
b3172f22 390 case 22050:
0b5e92c5
JC		 391 addcntrl |= (0x2 << 1);
392 break;
b3172f22 393 case 32000:
0b5e92c5
JC		 394 addcntrl |= (0x1 << 1);
395 break;
b3172f22
GL		 396 case 44100:
397 case 48000:
0b5e92c5
JC		 398 break;
399 }
8d50e447 400 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
0b5e92c5
JC		 401 if (ret)
402 goto error_ret;
403
404 switch (params_format(params)) {
405 case SNDRV_PCM_FORMAT_S8:
406 companding = companding | (1 << 5);
407 break;
408 case SNDRV_PCM_FORMAT_S16_LE:
409 break;
410 case SNDRV_PCM_FORMAT_S20_3LE:
411 iface |= (1 << 5);
412 break;
413 case SNDRV_PCM_FORMAT_S24_LE:
414 iface |= (2 << 5);
415 break;
416 case SNDRV_PCM_FORMAT_S32_LE:
417 iface |= (3 << 5);
418 break;
419 }
8d50e447 420 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
0b5e92c5
JC		 421 if (ret)
422 goto error_ret;
8d50e447 423 ret = snd_soc_write(codec, WM8940_IFACE, iface);
0b5e92c5
JC		 424
425error_ret:
426 return ret;
427}
428
429static int wm8940_mute(struct snd_soc_dai *dai, int mute)
430{
431 struct snd_soc_codec *codec = dai->codec;
8d50e447 432 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
0b5e92c5
JC		 433
434 if (mute)
435 mute_reg |= 0x40;
436
8d50e447 437 return snd_soc_write(codec, WM8940_DAC, mute_reg);
0b5e92c5
JC		 438}
439
440static int wm8940_set_bias_level(struct snd_soc_codec *codec,
441 enum snd_soc_bias_level level)
442{
443 u16 val;
8d50e447 444 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
0b5e92c5
JC		 445 int ret = 0;
446
447 switch (level) {
448 case SND_SOC_BIAS_ON:
449 /* ensure bufioen and biasen */
450 pwr_reg |= (1 << 2) | (1 << 3);
451 /* Enable thermal shutdown */
8d50e447
MB		 452 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
453 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
0b5e92c5
JC		 454 if (ret)
455 break;
456 /* set vmid to 75k */
8d50e447 457 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
0b5e92c5
JC		 458 break;
459 case SND_SOC_BIAS_PREPARE:
460 /* ensure bufioen and biasen */
461 pwr_reg |= (1 << 2) | (1 << 3);
8d50e447 462 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
0b5e92c5
JC		 463 break;
464 case SND_SOC_BIAS_STANDBY:
465 /* ensure bufioen and biasen */
466 pwr_reg |= (1 << 2) | (1 << 3);
467 /* set vmid to 300k for standby */
8d50e447 468 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
0b5e92c5
JC		 469 break;
470 case SND_SOC_BIAS_OFF:
8d50e447 471 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
0b5e92c5
JC		 472 break;
473 }
474
475 return ret;
476}
477
478struct pll_ {
479 unsigned int pre_scale:2;
480 unsigned int n:4;
481 unsigned int k;
482};
483
484static struct pll_ pll_div;
485
486/* The size in bits of the pll divide multiplied by 10
487 * to allow rounding later */
488#define FIXED_PLL_SIZE ((1 << 24) * 10)
489static void pll_factors(unsigned int target, unsigned int source)
490{
491 unsigned long long Kpart;
492 unsigned int K, Ndiv, Nmod;
493 /* The left shift ist to avoid accuracy loss when right shifting */
494 Ndiv = target / source;
495
496 if (Ndiv > 12) {
497 source <<= 1;
498 /* Multiply by 2 */
499 pll_div.pre_scale = 0;
500 Ndiv = target / source;
501 } else if (Ndiv < 3) {
502 source >>= 2;
503 /* Divide by 4 */
504 pll_div.pre_scale = 3;
505 Ndiv = target / source;
506 } else if (Ndiv < 6) {
507 source >>= 1;
508 /* divide by 2 */
509 pll_div.pre_scale = 2;
510 Ndiv = target / source;
511 } else
512 pll_div.pre_scale = 1;
513
514 if ((Ndiv < 6) || (Ndiv > 12))
515 printk(KERN_WARNING
516 "WM8940 N value %d outwith recommended range!d\n",
517 Ndiv);
518
519 pll_div.n = Ndiv;
520 Nmod = target % source;
521 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
522
523 do_div(Kpart, source);
524
525 K = Kpart & 0xFFFFFFFF;
526
527 /* Check if we need to round */
528 if ((K % 10) >= 5)
529 K += 5;
530
531 /* Move down to proper range now rounding is done */
532 K /= 10;
533
534 pll_div.k = K;
535}
536
537/* Untested at the moment */
85488037
MB		 538static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
539 int source, unsigned int freq_in, unsigned int freq_out)
0b5e92c5
JC		 540{
541 struct snd_soc_codec *codec = codec_dai->codec;
542 u16 reg;
543
544 /* Turn off PLL */
8d50e447
MB		 545 reg = snd_soc_read(codec, WM8940_POWER1);
546 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
0b5e92c5
JC		 547
548 if (freq_in == 0 || freq_out == 0) {
549 /* Clock CODEC directly from MCLK */
8d50e447
MB		 550 reg = snd_soc_read(codec, WM8940_CLOCK);
551 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
0b5e92c5 552 /* Pll power down */
8d50e447 553 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
0b5e92c5
JC		 554 return 0;
555 }
556
557 /* Pll is followed by a frequency divide by 4 */
558 pll_factors(freq_out*4, freq_in);
559 if (pll_div.k)
8d50e447 560 snd_soc_write(codec, WM8940_PLLN,
0b5e92c5
JC		 561 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
562 else /* No factional component */
8d50e447 563 snd_soc_write(codec, WM8940_PLLN,
0b5e92c5 564 (pll_div.pre_scale << 4) | pll_div.n);
8d50e447
MB		 565 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
566 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
567 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
0b5e92c5 568 /* Enable the PLL */
8d50e447
MB		 569 reg = snd_soc_read(codec, WM8940_POWER1);
570 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
0b5e92c5
JC		 571
572 /* Run CODEC from PLL instead of MCLK */
8d50e447
MB		 573 reg = snd_soc_read(codec, WM8940_CLOCK);
574 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
0b5e92c5
JC		 575
576 return 0;
577}
578
579static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
580 int clk_id, unsigned int freq, int dir)
581{
582 struct snd_soc_codec *codec = codec_dai->codec;
583 struct wm8940_priv *wm8940 = codec->private_data;
584
585 switch (freq) {
586 case 11289600:
587 case 12000000:
588 case 12288000:
589 case 16934400:
590 case 18432000:
591 wm8940->sysclk = freq;
592 return 0;
593 }
594 return -EINVAL;
595}
596
597static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
598 int div_id, int div)
599{
600 struct snd_soc_codec *codec = codec_dai->codec;
601 u16 reg;
602 int ret = 0;
603
604 switch (div_id) {
605 case WM8940_BCLKDIV:
8d50e447
MB		 606 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
607 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
0b5e92c5
JC		 608 break;
609 case WM8940_MCLKDIV:
8d50e447
MB		 610 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
611 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
0b5e92c5
JC		 612 break;
613 case WM8940_OPCLKDIV:
8d50e447
MB		 614 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
615 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
0b5e92c5
JC		 616 break;
617 }
618 return ret;
619}
620
621#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
622
623#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
624 SNDRV_PCM_FMTBIT_S16_LE | \
625 SNDRV_PCM_FMTBIT_S20_3LE | \
626 SNDRV_PCM_FMTBIT_S24_LE | \
627 SNDRV_PCM_FMTBIT_S32_LE)
628
629static struct snd_soc_dai_ops wm8940_dai_ops = {
630 .hw_params = wm8940_i2s_hw_params,
631 .set_sysclk = wm8940_set_dai_sysclk,
632 .digital_mute = wm8940_mute,
633 .set_fmt = wm8940_set_dai_fmt,
634 .set_clkdiv = wm8940_set_dai_clkdiv,
635 .set_pll = wm8940_set_dai_pll,
636};
637
638struct snd_soc_dai wm8940_dai = {
639 .name = "WM8940",
640 .playback = {
641 .stream_name = "Playback",
642 .channels_min = 1,
643 .channels_max = 2,
644 .rates = WM8940_RATES,
645 .formats = WM8940_FORMATS,
646 },
647 .capture = {
648 .stream_name = "Capture",
649 .channels_min = 1,
650 .channels_max = 2,
651 .rates = WM8940_RATES,
652 .formats = WM8940_FORMATS,
653 },
654 .ops = &wm8940_dai_ops,
655 .symmetric_rates = 1,
656};
657EXPORT_SYMBOL_GPL(wm8940_dai);
658
659static int wm8940_suspend(struct platform_device *pdev, pm_message_t state)
660{
661 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
662 struct snd_soc_codec *codec = socdev->card->codec;
663
664 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
665}
666
667static int wm8940_resume(struct platform_device *pdev)
668{
669 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
670 struct snd_soc_codec *codec = socdev->card->codec;
671 int i;
672 int ret;
673 u8 data[3];
674 u16 *cache = codec->reg_cache;
675
676 /* Sync reg_cache with the hardware
677 * Could use auto incremented writes to speed this up
678 */
679 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
680 data[0] = i;
681 data[1] = (cache[i] & 0xFF00) >> 8;
682 data[2] = cache[i] & 0x00FF;
683 ret = codec->hw_write(codec->control_data, data, 3);
684 if (ret < 0)
685 goto error_ret;
686 else if (ret != 3) {
687 ret = -EIO;
688 goto error_ret;
689 }
690 }
691 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
692 if (ret)
693 goto error_ret;
694 ret = wm8940_set_bias_level(codec, codec->suspend_bias_level);
695
696error_ret:
697 return ret;
698}
699
700static struct snd_soc_codec *wm8940_codec;
701
702static int wm8940_probe(struct platform_device *pdev)
703{
704 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
705 struct snd_soc_codec *codec;
706
707 int ret = 0;
708
709 if (wm8940_codec == NULL) {
710 dev_err(&pdev->dev, "Codec device not registered\n");
711 return -ENODEV;
712 }
713
714 socdev->card->codec = wm8940_codec;
715 codec = wm8940_codec;
716
717 mutex_init(&codec->mutex);
718 /* register pcms */
719 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
720 if (ret < 0) {
721 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
722 goto pcm_err;
723 }
724
725 ret = snd_soc_add_controls(codec, wm8940_snd_controls,
726 ARRAY_SIZE(wm8940_snd_controls));
727 if (ret)
728 goto error_free_pcms;
729 ret = wm8940_add_widgets(codec);
730 if (ret)
731 goto error_free_pcms;
732
0b5e92c5
JC		 733 return ret;
734
735error_free_pcms:
736 snd_soc_free_pcms(socdev);
737 snd_soc_dapm_free(socdev);
738pcm_err:
739 return ret;
740}
741
742static int wm8940_remove(struct platform_device *pdev)
743{
744 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
745
746 snd_soc_free_pcms(socdev);
747 snd_soc_dapm_free(socdev);
748
749 return 0;
750}
751
752struct snd_soc_codec_device soc_codec_dev_wm8940 = {
753 .probe = wm8940_probe,
754 .remove = wm8940_remove,
755 .suspend = wm8940_suspend,
756 .resume = wm8940_resume,
757};
758EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940);
759
8d50e447
MB		 760static int wm8940_register(struct wm8940_priv *wm8940,
761 enum snd_soc_control_type control)
0b5e92c5
JC		 762{
763 struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data;
764 struct snd_soc_codec *codec = &wm8940->codec;
765 int ret;
766 u16 reg;
767 if (wm8940_codec) {
768 dev_err(codec->dev, "Another WM8940 is registered\n");
769 return -EINVAL;
770 }
771
772 INIT_LIST_HEAD(&codec->dapm_widgets);
773 INIT_LIST_HEAD(&codec->dapm_paths);
774
775 codec->private_data = wm8940;
776 codec->name = "WM8940";
777 codec->owner = THIS_MODULE;
0b5e92c5
JC		 778 codec->bias_level = SND_SOC_BIAS_OFF;
779 codec->set_bias_level = wm8940_set_bias_level;
780 codec->dai = &wm8940_dai;
781 codec->num_dai = 1;
782 codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults);
783 codec->reg_cache = &wm8940->reg_cache;
784
8d50e447 785 ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
e655a435 786 if (ret < 0) {
8d50e447
MB		 787 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
788 return ret;
789 }
790
0b5e92c5
JC		 791 memcpy(codec->reg_cache, wm8940_reg_defaults,
792 sizeof(wm8940_reg_defaults));
793
794 ret = wm8940_reset(codec);
795 if (ret < 0) {
796 dev_err(codec->dev, "Failed to issue reset\n");
797 return ret;
798 }
799
800 wm8940_dai.dev = codec->dev;
801
802 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
803
8d50e447 804 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
0b5e92c5
JC		 805 if (ret < 0)
806 return ret;
807
808 if (!pdata)
809 dev_warn(codec->dev, "No platform data supplied\n");
810 else {
8d50e447
MB		 811 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
812 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
0b5e92c5
JC		 813 if (ret < 0)
814 return ret;
815 }
816
817
818 wm8940_codec = codec;
819
820 ret = snd_soc_register_codec(codec);
821 if (ret) {
822 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
823 return ret;
824 }
825
826 ret = snd_soc_register_dai(&wm8940_dai);
827 if (ret) {
828 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
829 snd_soc_unregister_codec(codec);
830 return ret;
831 }
832
833 return 0;
834}
835
836static void wm8940_unregister(struct wm8940_priv *wm8940)
837{
838 wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF);
839 snd_soc_unregister_dai(&wm8940_dai);
840 snd_soc_unregister_codec(&wm8940->codec);
841 kfree(wm8940);
842 wm8940_codec = NULL;
843}
844
845static int wm8940_i2c_probe(struct i2c_client *i2c,
846 const struct i2c_device_id *id)
847{
848 struct wm8940_priv *wm8940;
849 struct snd_soc_codec *codec;
850
851 wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL);
852 if (wm8940 == NULL)
853 return -ENOMEM;
854
855 codec = &wm8940->codec;
856 codec->hw_write = (hw_write_t)i2c_master_send;
857 i2c_set_clientdata(i2c, wm8940);
858 codec->control_data = i2c;
859 codec->dev = &i2c->dev;
860
8d50e447 861 return wm8940_register(wm8940, SND_SOC_I2C);
0b5e92c5
JC		 862}
863
2baaec28 864static int __devexit wm8940_i2c_remove(struct i2c_client *client)
0b5e92c5
JC		 865{
866 struct wm8940_priv *wm8940 = i2c_get_clientdata(client);
867
868 wm8940_unregister(wm8940);
869
870 return 0;
871}
872
873static const struct i2c_device_id wm8940_i2c_id[] = {
874 { "wm8940", 0 },
875 { }
876};
877MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
878
879static struct i2c_driver wm8940_i2c_driver = {
880 .driver = {
881 .name = "WM8940 I2C Codec",
882 .owner = THIS_MODULE,
883 },
884 .probe = wm8940_i2c_probe,
885 .remove = __devexit_p(wm8940_i2c_remove),
886 .id_table = wm8940_i2c_id,
887};
888
889static int __init wm8940_modinit(void)
890{
891 int ret;
892
893 ret = i2c_add_driver(&wm8940_i2c_driver);
894 if (ret)
895 printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n",
896 ret);
897 return ret;
898}
899module_init(wm8940_modinit);
900
901static void __exit wm8940_exit(void)
902{
903 i2c_del_driver(&wm8940_i2c_driver);
904}
905module_exit(wm8940_exit);
906
907MODULE_DESCRIPTION("ASoC WM8940 driver");
908MODULE_AUTHOR("Jonathan Cameron");
909MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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