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authorJonathan Cameron <jic23@cam.ac.uk>2009-04-27 09:49:44 -0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-04-27 15:37:13 -0400
commit0b5e92c5e020ee7437fa5304a8451d6dd08d1a26 (patch)
treecaf01fe4ba621df58b09d5e07f61daa9a676a0fd /sound/soc/codecs/wm8940.c
parenta7be4d92d989fc53d840d24cba2ebea9e5ad8480 (diff)
ASoC WM8940 Driver
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/wm8940.c')
-rw-r--r--sound/soc/codecs/wm8940.c955
1 files changed, 955 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
new file mode 100644
index 000000000000..26987dcd8d55
--- /dev/null
+++ b/sound/soc/codecs/wm8940.c
@@ -0,0 +1,955 @@
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
109static inline unsigned int wm8940_read_reg_cache(struct snd_soc_codec *codec,
110 unsigned int reg)
111{
112 u16 *cache = codec->reg_cache;
113
114 if (reg >= ARRAY_SIZE(wm8940_reg_defaults))
115 return -1;
116
117 return cache[reg];
118}
119
120static inline int wm8940_write_reg_cache(struct snd_soc_codec *codec,
121 u16 reg, unsigned int value)
122{
123 u16 *cache = codec->reg_cache;
124
125 if (reg >= ARRAY_SIZE(wm8940_reg_defaults))
126 return -1;
127
128 cache[reg] = value;
129
130 return 0;
131}
132
133static int wm8940_write(struct snd_soc_codec *codec, unsigned int reg,
134 unsigned int value)
135{
136 int ret;
137 u8 data[3] = { reg,
138 (value & 0xff00) >> 8,
139 (value & 0x00ff)
140 };
141
142 wm8940_write_reg_cache(codec, reg, value);
143
144 ret = codec->hw_write(codec->control_data, data, 3);
145
146 if (ret < 0)
147 return ret;
148 else if (ret != 3)
149 return -EIO;
150 return 0;
151}
152
153static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
154static const struct soc_enum wm8940_adc_companding_enum
155= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
156static const struct soc_enum wm8940_dac_companding_enum
157= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
158
159static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
160static const struct soc_enum wm8940_alc_mode_enum
161= SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
162
163static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
164static const struct soc_enum wm8940_mic_bias_level_enum
165= SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
166
167static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
168static const struct soc_enum wm8940_filter_mode_enum
169= SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
170
171DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
172DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
173DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
174DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
175DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
176DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
177DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
178DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
179DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
180DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
181
182static const struct snd_kcontrol_new wm8940_snd_controls[] = {
183 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
184 6, 1, 0),
185 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
186 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
187
188 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
189 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
190 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
191 3, 7, 1, wm8940_alc_max_tlv),
192 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
193 0, 7, 0, wm8940_alc_min_tlv),
194 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
195 0, 14, 0, wm8940_alc_tar_tlv),
196 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
197 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
198 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
199 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
200 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
201 3, 1, 0),
202 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
203 0, 7, 0),
204
205 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
206 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
207 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
208 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
209 4, 9, 1, wm8940_lim_thresh_tlv),
210 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
211 0, 12, 0, wm8940_lim_boost_tlv),
212
213 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
214 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
215 0, 63, 0, wm8940_pga_vol_tlv),
216 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
217 0, 255, 0, wm8940_adc_tlv),
218 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
219 0, 255, 0, wm8940_adc_tlv),
220 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
221 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
222 8, 1, 0, wm8940_capture_boost_vol_tlv),
223 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
224 0, 63, 0, wm8940_spk_vol_tlv),
225 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
226
227 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
228 8, 1, 1, wm8940_att_tlv),
229 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
230
231 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
232 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
233 7, 1, 1, wm8940_att_tlv),
234
235 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
236 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
237 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
238 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
239 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
240 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
241 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
242};
243
244static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
245 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
246 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
247 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
248};
249
250static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
251 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
252 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
253 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
254};
255
256DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
257static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
258 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
259 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
260 0, 7, 0, wm8940_boost_vol_tlv),
261 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
262 4, 7, 0, wm8940_boost_vol_tlv),
263};
264
265static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
266 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
267 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
268 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
269};
270
271static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
272 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
273 &wm8940_speaker_mixer_controls[0],
274 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
275 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
276 &wm8940_mono_mixer_controls[0],
277 ARRAY_SIZE(wm8940_mono_mixer_controls)),
278 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
279
280 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
281 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
282 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
283 SND_SOC_DAPM_OUTPUT("MONOOUT"),
284 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
285 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
286
287 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
288 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
289 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
290 &wm8940_micpga_controls[0],
291 ARRAY_SIZE(wm8940_micpga_controls)),
292 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
293 &wm8940_input_boost_controls[0],
294 ARRAY_SIZE(wm8940_input_boost_controls)),
295 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
296
297 SND_SOC_DAPM_INPUT("MICN"),
298 SND_SOC_DAPM_INPUT("MICP"),
299 SND_SOC_DAPM_INPUT("AUX"),
300};
301
302static const struct snd_soc_dapm_route audio_map[] = {
303 /* Mono output mixer */
304 {"Mono Mixer", "PCM Playback Switch", "DAC"},
305 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
306 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
307
308 /* Speaker output mixer */
309 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
310 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
311 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
312
313 /* Outputs */
314 {"Mono Out", NULL, "Mono Mixer"},
315 {"MONOOUT", NULL, "Mono Out"},
316 {"SpkN Out", NULL, "Speaker Mixer"},
317 {"SpkP Out", NULL, "Speaker Mixer"},
318 {"SPKOUTN", NULL, "SpkN Out"},
319 {"SPKOUTP", NULL, "SpkP Out"},
320
321 /* Microphone PGA */
322 {"Mic PGA", "MICN Switch", "MICN"},
323 {"Mic PGA", "MICP Switch", "MICP"},
324 {"Mic PGA", "AUX Switch", "AUX"},
325
326 /* Boost Mixer */
327 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
328 {"Boost Mixer", "Mic Volume", "MICP"},
329 {"Boost Mixer", "Aux Volume", "Aux Input"},
330
331 {"ADC", NULL, "Boost Mixer"},
332};
333
334static int wm8940_add_widgets(struct snd_soc_codec *codec)
335{
336 int ret;
337
338 ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets,
339 ARRAY_SIZE(wm8940_dapm_widgets));
340 if (ret)
341 goto error_ret;
342 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
343 if (ret)
344 goto error_ret;
345 ret = snd_soc_dapm_new_widgets(codec);
346
347error_ret:
348 return ret;
349}
350
351#define wm8940_reset(c) wm8940_write(c, WM8940_SOFTRESET, 0);
352
353static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
354 unsigned int fmt)
355{
356 struct snd_soc_codec *codec = codec_dai->codec;
357 u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFE67;
358 u16 clk = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0x1fe;
359
360 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
361 case SND_SOC_DAIFMT_CBM_CFM:
362 clk |= 1;
363 break;
364 case SND_SOC_DAIFMT_CBS_CFS:
365 break;
366 default:
367 return -EINVAL;
368 }
369 wm8940_write(codec, WM8940_CLOCK, clk);
370
371 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
372 case SND_SOC_DAIFMT_I2S:
373 iface |= (2 << 3);
374 break;
375 case SND_SOC_DAIFMT_LEFT_J:
376 iface |= (1 << 3);
377 break;
378 case SND_SOC_DAIFMT_RIGHT_J:
379 break;
380 case SND_SOC_DAIFMT_DSP_A:
381 iface |= (3 << 3);
382 break;
383 case SND_SOC_DAIFMT_DSP_B:
384 iface |= (3 << 3) | (1 << 7);
385 break;
386 }
387
388 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
389 case SND_SOC_DAIFMT_NB_NF:
390 break;
391 case SND_SOC_DAIFMT_NB_IF:
392 iface |= (1 << 7);
393 break;
394 case SND_SOC_DAIFMT_IB_NF:
395 iface |= (1 << 8);
396 break;
397 case SND_SOC_DAIFMT_IB_IF:
398 iface |= (1 << 8) | (1 << 7);
399 break;
400 }
401
402 wm8940_write(codec, WM8940_IFACE, iface);
403
404 return 0;
405}
406
407static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
408 struct snd_pcm_hw_params *params,
409 struct snd_soc_dai *dai)
410{
411 struct snd_soc_pcm_runtime *rtd = substream->private_data;
412 struct snd_soc_device *socdev = rtd->socdev;
413 struct snd_soc_codec *codec = socdev->card->codec;
414 u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFD9F;
415 u16 addcntrl = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFF1;
416 u16 companding = wm8940_read_reg_cache(codec,
417 WM8940_COMPANDINGCTL) & 0xFFDF;
418 int ret;
419
420 /* LoutR control */
421 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
422 && params_channels(params) == 2)
423 iface |= (1 << 9);
424
425 switch (params_rate(params)) {
426 case SNDRV_PCM_RATE_8000:
427 addcntrl |= (0x5 << 1);
428 break;
429 case SNDRV_PCM_RATE_11025:
430 addcntrl |= (0x4 << 1);
431 break;
432 case SNDRV_PCM_RATE_16000:
433 addcntrl |= (0x3 << 1);
434 break;
435 case SNDRV_PCM_RATE_22050:
436 addcntrl |= (0x2 << 1);
437 break;
438 case SNDRV_PCM_RATE_32000:
439 addcntrl |= (0x1 << 1);
440 break;
441 case SNDRV_PCM_RATE_44100:
442 case SNDRV_PCM_RATE_48000:
443 break;
444 }
445 ret = wm8940_write(codec, WM8940_ADDCNTRL, addcntrl);
446 if (ret)
447 goto error_ret;
448
449 switch (params_format(params)) {
450 case SNDRV_PCM_FORMAT_S8:
451 companding = companding | (1 << 5);
452 break;
453 case SNDRV_PCM_FORMAT_S16_LE:
454 break;
455 case SNDRV_PCM_FORMAT_S20_3LE:
456 iface |= (1 << 5);
457 break;
458 case SNDRV_PCM_FORMAT_S24_LE:
459 iface |= (2 << 5);
460 break;
461 case SNDRV_PCM_FORMAT_S32_LE:
462 iface |= (3 << 5);
463 break;
464 }
465 ret = wm8940_write(codec, WM8940_COMPANDINGCTL, companding);
466 if (ret)
467 goto error_ret;
468 ret = wm8940_write(codec, WM8940_IFACE, iface);
469
470error_ret:
471 return ret;
472}
473
474static int wm8940_mute(struct snd_soc_dai *dai, int mute)
475{
476 struct snd_soc_codec *codec = dai->codec;
477 u16 mute_reg = wm8940_read_reg_cache(codec, WM8940_DAC) & 0xffbf;
478
479 if (mute)
480 mute_reg |= 0x40;
481
482 return wm8940_write(codec, WM8940_DAC, mute_reg);
483}
484
485static int wm8940_set_bias_level(struct snd_soc_codec *codec,
486 enum snd_soc_bias_level level)
487{
488 u16 val;
489 u16 pwr_reg = wm8940_read_reg_cache(codec, WM8940_POWER1) & 0x1F0;
490 int ret = 0;
491
492 switch (level) {
493 case SND_SOC_BIAS_ON:
494 /* ensure bufioen and biasen */
495 pwr_reg |= (1 << 2) | (1 << 3);
496 /* Enable thermal shutdown */
497 val = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL);
498 ret = wm8940_write(codec, WM8940_OUTPUTCTL, val | 0x2);
499 if (ret)
500 break;
501 /* set vmid to 75k */
502 ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1);
503 break;
504 case SND_SOC_BIAS_PREPARE:
505 /* ensure bufioen and biasen */
506 pwr_reg |= (1 << 2) | (1 << 3);
507 ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1);
508 break;
509 case SND_SOC_BIAS_STANDBY:
510 /* ensure bufioen and biasen */
511 pwr_reg |= (1 << 2) | (1 << 3);
512 /* set vmid to 300k for standby */
513 ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x2);
514 break;
515 case SND_SOC_BIAS_OFF:
516 ret = wm8940_write(codec, WM8940_POWER1, pwr_reg);
517 break;
518 }
519
520 return ret;
521}
522
523struct pll_ {
524 unsigned int pre_scale:2;
525 unsigned int n:4;
526 unsigned int k;
527};
528
529static struct pll_ pll_div;
530
531/* The size in bits of the pll divide multiplied by 10
532 * to allow rounding later */
533#define FIXED_PLL_SIZE ((1 << 24) * 10)
534static void pll_factors(unsigned int target, unsigned int source)
535{
536 unsigned long long Kpart;
537 unsigned int K, Ndiv, Nmod;
538 /* The left shift ist to avoid accuracy loss when right shifting */
539 Ndiv = target / source;
540
541 if (Ndiv > 12) {
542 source <<= 1;
543 /* Multiply by 2 */
544 pll_div.pre_scale = 0;
545 Ndiv = target / source;
546 } else if (Ndiv < 3) {
547 source >>= 2;
548 /* Divide by 4 */
549 pll_div.pre_scale = 3;
550 Ndiv = target / source;
551 } else if (Ndiv < 6) {
552 source >>= 1;
553 /* divide by 2 */
554 pll_div.pre_scale = 2;
555 Ndiv = target / source;
556 } else
557 pll_div.pre_scale = 1;
558
559 if ((Ndiv < 6) || (Ndiv > 12))
560 printk(KERN_WARNING
561 "WM8940 N value %d outwith recommended range!d\n",
562 Ndiv);
563
564 pll_div.n = Ndiv;
565 Nmod = target % source;
566 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
567
568 do_div(Kpart, source);
569
570 K = Kpart & 0xFFFFFFFF;
571
572 /* Check if we need to round */
573 if ((K % 10) >= 5)
574 K += 5;
575
576 /* Move down to proper range now rounding is done */
577 K /= 10;
578
579 pll_div.k = K;
580}
581
582/* Untested at the moment */
583static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai,
584 int pll_id, unsigned int freq_in, unsigned int freq_out)
585{
586 struct snd_soc_codec *codec = codec_dai->codec;
587 u16 reg;
588
589 /* Turn off PLL */
590 reg = wm8940_read_reg_cache(codec, WM8940_POWER1);
591 wm8940_write(codec, WM8940_POWER1, reg & 0x1df);
592
593 if (freq_in == 0 || freq_out == 0) {
594 /* Clock CODEC directly from MCLK */
595 reg = wm8940_read_reg_cache(codec, WM8940_CLOCK);
596 wm8940_write(codec, WM8940_CLOCK, reg & 0x0ff);
597 /* Pll power down */
598 wm8940_write(codec, WM8940_PLLN, (1 << 7));
599 return 0;
600 }
601
602 /* Pll is followed by a frequency divide by 4 */
603 pll_factors(freq_out*4, freq_in);
604 if (pll_div.k)
605 wm8940_write(codec, WM8940_PLLN,
606 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
607 else /* No factional component */
608 wm8940_write(codec, WM8940_PLLN,
609 (pll_div.pre_scale << 4) | pll_div.n);
610 wm8940_write(codec, WM8940_PLLK1, pll_div.k >> 18);
611 wm8940_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
612 wm8940_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
613 /* Enable the PLL */
614 reg = wm8940_read_reg_cache(codec, WM8940_POWER1);
615 wm8940_write(codec, WM8940_POWER1, reg | 0x020);
616
617 /* Run CODEC from PLL instead of MCLK */
618 reg = wm8940_read_reg_cache(codec, WM8940_CLOCK);
619 wm8940_write(codec, WM8940_CLOCK, reg | 0x100);
620
621 return 0;
622}
623
624static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
625 int clk_id, unsigned int freq, int dir)
626{
627 struct snd_soc_codec *codec = codec_dai->codec;
628 struct wm8940_priv *wm8940 = codec->private_data;
629
630 switch (freq) {
631 case 11289600:
632 case 12000000:
633 case 12288000:
634 case 16934400:
635 case 18432000:
636 wm8940->sysclk = freq;
637 return 0;
638 }
639 return -EINVAL;
640}
641
642static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
643 int div_id, int div)
644{
645 struct snd_soc_codec *codec = codec_dai->codec;
646 u16 reg;
647 int ret = 0;
648
649 switch (div_id) {
650 case WM8940_BCLKDIV:
651 reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFFEF3;
652 ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 2));
653 break;
654 case WM8940_MCLKDIV:
655 reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFF1F;
656 ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 5));
657 break;
658 case WM8940_OPCLKDIV:
659 reg = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFCF;
660 ret = wm8940_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
661 break;
662 }
663 return ret;
664}
665
666#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
667
668#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
669 SNDRV_PCM_FMTBIT_S16_LE | \
670 SNDRV_PCM_FMTBIT_S20_3LE | \
671 SNDRV_PCM_FMTBIT_S24_LE | \
672 SNDRV_PCM_FMTBIT_S32_LE)
673
674static struct snd_soc_dai_ops wm8940_dai_ops = {
675 .hw_params = wm8940_i2s_hw_params,
676 .set_sysclk = wm8940_set_dai_sysclk,
677 .digital_mute = wm8940_mute,
678 .set_fmt = wm8940_set_dai_fmt,
679 .set_clkdiv = wm8940_set_dai_clkdiv,
680 .set_pll = wm8940_set_dai_pll,
681};
682
683struct snd_soc_dai wm8940_dai = {
684 .name = "WM8940",
685 .playback = {
686 .stream_name = "Playback",
687 .channels_min = 1,
688 .channels_max = 2,
689 .rates = WM8940_RATES,
690 .formats = WM8940_FORMATS,
691 },
692 .capture = {
693 .stream_name = "Capture",
694 .channels_min = 1,
695 .channels_max = 2,
696 .rates = WM8940_RATES,
697 .formats = WM8940_FORMATS,
698 },
699 .ops = &wm8940_dai_ops,
700 .symmetric_rates = 1,
701};
702EXPORT_SYMBOL_GPL(wm8940_dai);
703
704static int wm8940_suspend(struct platform_device *pdev, pm_message_t state)
705{
706 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
707 struct snd_soc_codec *codec = socdev->card->codec;
708
709 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
710}
711
712static int wm8940_resume(struct platform_device *pdev)
713{
714 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
715 struct snd_soc_codec *codec = socdev->card->codec;
716 int i;
717 int ret;
718 u8 data[3];
719 u16 *cache = codec->reg_cache;
720
721 /* Sync reg_cache with the hardware
722 * Could use auto incremented writes to speed this up
723 */
724 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
725 data[0] = i;
726 data[1] = (cache[i] & 0xFF00) >> 8;
727 data[2] = cache[i] & 0x00FF;
728 ret = codec->hw_write(codec->control_data, data, 3);
729 if (ret < 0)
730 goto error_ret;
731 else if (ret != 3) {
732 ret = -EIO;
733 goto error_ret;
734 }
735 }
736 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
737 if (ret)
738 goto error_ret;
739 ret = wm8940_set_bias_level(codec, codec->suspend_bias_level);
740
741error_ret:
742 return ret;
743}
744
745static struct snd_soc_codec *wm8940_codec;
746
747static int wm8940_probe(struct platform_device *pdev)
748{
749 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
750 struct snd_soc_codec *codec;
751
752 int ret = 0;
753
754 if (wm8940_codec == NULL) {
755 dev_err(&pdev->dev, "Codec device not registered\n");
756 return -ENODEV;
757 }
758
759 socdev->card->codec = wm8940_codec;
760 codec = wm8940_codec;
761
762 mutex_init(&codec->mutex);
763 /* register pcms */
764 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
765 if (ret < 0) {
766 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
767 goto pcm_err;
768 }
769
770 ret = snd_soc_add_controls(codec, wm8940_snd_controls,
771 ARRAY_SIZE(wm8940_snd_controls));
772 if (ret)
773 goto error_free_pcms;
774 ret = wm8940_add_widgets(codec);
775 if (ret)
776 goto error_free_pcms;
777
778 ret = snd_soc_init_card(socdev);
779 if (ret < 0) {
780 dev_err(codec->dev, "failed to register card: %d\n", ret);
781 goto error_free_pcms;
782 }
783
784 return ret;
785
786error_free_pcms:
787 snd_soc_free_pcms(socdev);
788 snd_soc_dapm_free(socdev);
789pcm_err:
790 return ret;
791}
792
793static int wm8940_remove(struct platform_device *pdev)
794{
795 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
796
797 snd_soc_free_pcms(socdev);
798 snd_soc_dapm_free(socdev);
799
800 return 0;
801}
802
803struct snd_soc_codec_device soc_codec_dev_wm8940 = {
804 .probe = wm8940_probe,
805 .remove = wm8940_remove,
806 .suspend = wm8940_suspend,
807 .resume = wm8940_resume,
808};
809EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940);
810
811static int wm8940_register(struct wm8940_priv *wm8940)
812{
813 struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data;
814 struct snd_soc_codec *codec = &wm8940->codec;
815 int ret;
816 u16 reg;
817 if (wm8940_codec) {
818 dev_err(codec->dev, "Another WM8940 is registered\n");
819 return -EINVAL;
820 }
821
822 INIT_LIST_HEAD(&codec->dapm_widgets);
823 INIT_LIST_HEAD(&codec->dapm_paths);
824
825 codec->private_data = wm8940;
826 codec->name = "WM8940";
827 codec->owner = THIS_MODULE;
828 codec->read = wm8940_read_reg_cache;
829 codec->write = wm8940_write;
830 codec->bias_level = SND_SOC_BIAS_OFF;
831 codec->set_bias_level = wm8940_set_bias_level;
832 codec->dai = &wm8940_dai;
833 codec->num_dai = 1;
834 codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults);
835 codec->reg_cache = &wm8940->reg_cache;
836
837 memcpy(codec->reg_cache, wm8940_reg_defaults,
838 sizeof(wm8940_reg_defaults));
839
840 ret = wm8940_reset(codec);
841 if (ret < 0) {
842 dev_err(codec->dev, "Failed to issue reset\n");
843 return ret;
844 }
845
846 wm8940_dai.dev = codec->dev;
847
848 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
849
850 ret = wm8940_write(codec, WM8940_POWER1, 0x180);
851 if (ret < 0)
852 return ret;
853
854 if (!pdata)
855 dev_warn(codec->dev, "No platform data supplied\n");
856 else {
857 reg = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL);
858 ret = wm8940_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
859 if (ret < 0)
860 return ret;
861 }
862
863
864 wm8940_codec = codec;
865
866 ret = snd_soc_register_codec(codec);
867 if (ret) {
868 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
869 return ret;
870 }
871
872 ret = snd_soc_register_dai(&wm8940_dai);
873 if (ret) {
874 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
875 snd_soc_unregister_codec(codec);
876 return ret;
877 }
878
879 return 0;
880}
881
882static void wm8940_unregister(struct wm8940_priv *wm8940)
883{
884 wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF);
885 snd_soc_unregister_dai(&wm8940_dai);
886 snd_soc_unregister_codec(&wm8940->codec);
887 kfree(wm8940);
888 wm8940_codec = NULL;
889}
890
891static int wm8940_i2c_probe(struct i2c_client *i2c,
892 const struct i2c_device_id *id)
893{
894 struct wm8940_priv *wm8940;
895 struct snd_soc_codec *codec;
896
897 wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL);
898 if (wm8940 == NULL)
899 return -ENOMEM;
900
901 codec = &wm8940->codec;
902 codec->hw_write = (hw_write_t)i2c_master_send;
903 i2c_set_clientdata(i2c, wm8940);
904 codec->control_data = i2c;
905 codec->dev = &i2c->dev;
906
907 return wm8940_register(wm8940);
908}
909
910static int wm8940_i2c_remove(struct i2c_client *client)
911{
912 struct wm8940_priv *wm8940 = i2c_get_clientdata(client);
913
914 wm8940_unregister(wm8940);
915
916 return 0;
917}
918
919static const struct i2c_device_id wm8940_i2c_id[] = {
920 { "wm8940", 0 },
921 { }
922};
923MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
924
925static struct i2c_driver wm8940_i2c_driver = {
926 .driver = {
927 .name = "WM8940 I2C Codec",
928 .owner = THIS_MODULE,
929 },
930 .probe = wm8940_i2c_probe,
931 .remove = __devexit_p(wm8940_i2c_remove),
932 .id_table = wm8940_i2c_id,
933};
934
935static int __init wm8940_modinit(void)
936{
937 int ret;
938
939 ret = i2c_add_driver(&wm8940_i2c_driver);
940 if (ret)
941 printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n",
942 ret);
943 return ret;
944}
945module_init(wm8940_modinit);
946
947static void __exit wm8940_exit(void)
948{
949 i2c_del_driver(&wm8940_i2c_driver);
950}
951module_exit(wm8940_exit);
952
953MODULE_DESCRIPTION("ASoC WM8940 driver");
954MODULE_AUTHOR("Jonathan Cameron");
955MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-10 21:32:34 -0500