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ASoC: wm8776: Convert to snd_soc_cache_sync
[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>
5a0e3ad6 33#include <linux/slab.h>
0b5e92c5
JC		 34#include <sound/core.h>
35#include <sound/pcm.h>
36#include <sound/pcm_params.h>
37#include <sound/soc.h>
0b5e92c5
JC		 38#include <sound/initval.h>
39#include <sound/tlv.h>
40
41#include "wm8940.h"
42
43struct wm8940_priv {
44 unsigned int sysclk;
f0fba2ad 45 enum snd_soc_control_type control_type;
0b5e92c5
JC		 46};
47
48static u16 wm8940_reg_defaults[] = {
49 0x8940, /* Soft Reset */
50 0x0000, /* Power 1 */
51 0x0000, /* Power 2 */
52 0x0000, /* Power 3 */
53 0x0010, /* Interface Control */
54 0x0000, /* Companding Control */
55 0x0140, /* Clock Control */
56 0x0000, /* Additional Controls */
57 0x0000, /* GPIO Control */
58 0x0002, /* Auto Increment Control */
59 0x0000, /* DAC Control */
60 0x00FF, /* DAC Volume */
61 0,
62 0,
63 0x0100, /* ADC Control */
64 0x00FF, /* ADC Volume */
65 0x0000, /* Notch Filter 1 Control 1 */
66 0x0000, /* Notch Filter 1 Control 2 */
67 0x0000, /* Notch Filter 2 Control 1 */
68 0x0000, /* Notch Filter 2 Control 2 */
69 0x0000, /* Notch Filter 3 Control 1 */
70 0x0000, /* Notch Filter 3 Control 2 */
71 0x0000, /* Notch Filter 4 Control 1 */
72 0x0000, /* Notch Filter 4 Control 2 */
73 0x0032, /* DAC Limit Control 1 */
74 0x0000, /* DAC Limit Control 2 */
75 0,
76 0,
77 0,
78 0,
79 0,
80 0,
81 0x0038, /* ALC Control 1 */
82 0x000B, /* ALC Control 2 */
83 0x0032, /* ALC Control 3 */
84 0x0000, /* Noise Gate */
85 0x0041, /* PLLN */
86 0x000C, /* PLLK1 */
87 0x0093, /* PLLK2 */
88 0x00E9, /* PLLK3 */
89 0,
90 0,
91 0x0030, /* ALC Control 4 */
92 0,
93 0x0002, /* Input Control */
94 0x0050, /* PGA Gain */
95 0,
96 0x0002, /* ADC Boost Control */
97 0,
98 0x0002, /* Output Control */
99 0x0000, /* Speaker Mixer Control */
100 0,
101 0,
102 0,
103 0x0079, /* Speaker Volume */
104 0,
105 0x0000, /* Mono Mixer Control */
106};
107
0b5e92c5
JC		 108static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
109static const struct soc_enum wm8940_adc_companding_enum
110= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
111static const struct soc_enum wm8940_dac_companding_enum
112= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
113
114static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
115static const struct soc_enum wm8940_alc_mode_enum
116= SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
117
118static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
119static const struct soc_enum wm8940_mic_bias_level_enum
120= SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
121
122static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
123static const struct soc_enum wm8940_filter_mode_enum
124= SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
125
6be01cfb
MB		 126static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
127static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
128static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
129static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
130static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
131static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
132static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
133static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
134static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
135static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
0b5e92c5
JC		 136
137static const struct snd_kcontrol_new wm8940_snd_controls[] = {
138 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
139 6, 1, 0),
140 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
141 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
142
143 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
144 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
145 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
146 3, 7, 1, wm8940_alc_max_tlv),
147 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
148 0, 7, 0, wm8940_alc_min_tlv),
149 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
150 0, 14, 0, wm8940_alc_tar_tlv),
151 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
152 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
153 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
154 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
155 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
156 3, 1, 0),
157 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
158 0, 7, 0),
159
160 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
161 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
162 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
163 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
164 4, 9, 1, wm8940_lim_thresh_tlv),
165 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
166 0, 12, 0, wm8940_lim_boost_tlv),
167
168 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
169 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
170 0, 63, 0, wm8940_pga_vol_tlv),
171 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
172 0, 255, 0, wm8940_adc_tlv),
173 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
174 0, 255, 0, wm8940_adc_tlv),
175 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
176 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
177 8, 1, 0, wm8940_capture_boost_vol_tlv),
178 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
179 0, 63, 0, wm8940_spk_vol_tlv),
180 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
181
182 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
183 8, 1, 1, wm8940_att_tlv),
184 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
185
186 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
187 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
188 7, 1, 1, wm8940_att_tlv),
189
190 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
191 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
192 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
193 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
194 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
195 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
196 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
197};
198
199static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
200 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
201 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
202 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
203};
204
205static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
206 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
207 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
208 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
209};
210
6be01cfb 211static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
0b5e92c5
JC		 212static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
213 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
214 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
215 0, 7, 0, wm8940_boost_vol_tlv),
216 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
217 4, 7, 0, wm8940_boost_vol_tlv),
218};
219
220static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
221 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
222 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
223 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
224};
225
226static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
227 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
228 &wm8940_speaker_mixer_controls[0],
229 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
230 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
231 &wm8940_mono_mixer_controls[0],
232 ARRAY_SIZE(wm8940_mono_mixer_controls)),
233 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
234
235 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
236 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
237 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
238 SND_SOC_DAPM_OUTPUT("MONOOUT"),
239 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
240 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
241
242 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
243 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
244 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
245 &wm8940_micpga_controls[0],
246 ARRAY_SIZE(wm8940_micpga_controls)),
247 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
248 &wm8940_input_boost_controls[0],
249 ARRAY_SIZE(wm8940_input_boost_controls)),
250 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
251
252 SND_SOC_DAPM_INPUT("MICN"),
253 SND_SOC_DAPM_INPUT("MICP"),
254 SND_SOC_DAPM_INPUT("AUX"),
255};
256
257static const struct snd_soc_dapm_route audio_map[] = {
258 /* Mono output mixer */
259 {"Mono Mixer", "PCM Playback Switch", "DAC"},
260 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
261 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
262
263 /* Speaker output mixer */
264 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
265 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
266 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
267
268 /* Outputs */
269 {"Mono Out", NULL, "Mono Mixer"},
270 {"MONOOUT", NULL, "Mono Out"},
271 {"SpkN Out", NULL, "Speaker Mixer"},
272 {"SpkP Out", NULL, "Speaker Mixer"},
273 {"SPKOUTN", NULL, "SpkN Out"},
274 {"SPKOUTP", NULL, "SpkP Out"},
275
276 /* Microphone PGA */
277 {"Mic PGA", "MICN Switch", "MICN"},
278 {"Mic PGA", "MICP Switch", "MICP"},
279 {"Mic PGA", "AUX Switch", "AUX"},
280
281 /* Boost Mixer */
282 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
283 {"Boost Mixer", "Mic Volume", "MICP"},
284 {"Boost Mixer", "Aux Volume", "Aux Input"},
285
286 {"ADC", NULL, "Boost Mixer"},
287};
288
289static int wm8940_add_widgets(struct snd_soc_codec *codec)
290{
ce6120cc 291 struct snd_soc_dapm_context *dapm = &codec->dapm;
0b5e92c5
JC		 292 int ret;
293
ce6120cc 294 ret = snd_soc_dapm_new_controls(dapm, wm8940_dapm_widgets,
0b5e92c5
JC		 295 ARRAY_SIZE(wm8940_dapm_widgets));
296 if (ret)
297 goto error_ret;
ce6120cc 298 ret = snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
0b5e92c5
JC		 299
300error_ret:
301 return ret;
302}
303
8d50e447 304#define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
0b5e92c5
JC		 305
306static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
307 unsigned int fmt)
308{
309 struct snd_soc_codec *codec = codec_dai->codec;
8d50e447
MB		 310 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
311 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
0b5e92c5
JC		 312
313 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
314 case SND_SOC_DAIFMT_CBM_CFM:
315 clk |= 1;
316 break;
317 case SND_SOC_DAIFMT_CBS_CFS:
318 break;
319 default:
320 return -EINVAL;
321 }
8d50e447 322 snd_soc_write(codec, WM8940_CLOCK, clk);
0b5e92c5
JC		 323
324 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
325 case SND_SOC_DAIFMT_I2S:
326 iface |= (2 << 3);
327 break;
328 case SND_SOC_DAIFMT_LEFT_J:
329 iface |= (1 << 3);
330 break;
331 case SND_SOC_DAIFMT_RIGHT_J:
332 break;
333 case SND_SOC_DAIFMT_DSP_A:
334 iface |= (3 << 3);
335 break;
336 case SND_SOC_DAIFMT_DSP_B:
337 iface |= (3 << 3) | (1 << 7);
338 break;
339 }
340
341 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
342 case SND_SOC_DAIFMT_NB_NF:
343 break;
344 case SND_SOC_DAIFMT_NB_IF:
345 iface |= (1 << 7);
346 break;
347 case SND_SOC_DAIFMT_IB_NF:
348 iface |= (1 << 8);
349 break;
350 case SND_SOC_DAIFMT_IB_IF:
351 iface |= (1 << 8) | (1 << 7);
352 break;
353 }
354
8d50e447 355 snd_soc_write(codec, WM8940_IFACE, iface);
0b5e92c5
JC		 356
357 return 0;
358}
359
360static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
361 struct snd_pcm_hw_params *params,
362 struct snd_soc_dai *dai)
363{
364 struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad 365 struct snd_soc_codec *codec = rtd->codec;
8d50e447
MB		 366 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
367 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
368 u16 companding = snd_soc_read(codec,
0b5e92c5
JC		 369 WM8940_COMPANDINGCTL) & 0xFFDF;
370 int ret;
371
372 /* LoutR control */
373 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
374 && params_channels(params) == 2)
375 iface |= (1 << 9);
376
377 switch (params_rate(params)) {
b3172f22 378 case 8000:
0b5e92c5
JC		 379 addcntrl |= (0x5 << 1);
380 break;
b3172f22 381 case 11025:
0b5e92c5
JC		 382 addcntrl |= (0x4 << 1);
383 break;
b3172f22 384 case 16000:
0b5e92c5
JC		 385 addcntrl |= (0x3 << 1);
386 break;
b3172f22 387 case 22050:
0b5e92c5
JC		 388 addcntrl |= (0x2 << 1);
389 break;
b3172f22 390 case 32000:
0b5e92c5
JC		 391 addcntrl |= (0x1 << 1);
392 break;
b3172f22
GL		 393 case 44100:
394 case 48000:
0b5e92c5
JC		 395 break;
396 }
8d50e447 397 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
0b5e92c5
JC		 398 if (ret)
399 goto error_ret;
400
401 switch (params_format(params)) {
402 case SNDRV_PCM_FORMAT_S8:
403 companding = companding | (1 << 5);
404 break;
405 case SNDRV_PCM_FORMAT_S16_LE:
406 break;
407 case SNDRV_PCM_FORMAT_S20_3LE:
408 iface |= (1 << 5);
409 break;
410 case SNDRV_PCM_FORMAT_S24_LE:
411 iface |= (2 << 5);
412 break;
413 case SNDRV_PCM_FORMAT_S32_LE:
414 iface |= (3 << 5);
415 break;
416 }
8d50e447 417 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
0b5e92c5
JC		 418 if (ret)
419 goto error_ret;
8d50e447 420 ret = snd_soc_write(codec, WM8940_IFACE, iface);
0b5e92c5
JC		 421
422error_ret:
423 return ret;
424}
425
426static int wm8940_mute(struct snd_soc_dai *dai, int mute)
427{
428 struct snd_soc_codec *codec = dai->codec;
8d50e447 429 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
0b5e92c5
JC		 430
431 if (mute)
432 mute_reg |= 0x40;
433
8d50e447 434 return snd_soc_write(codec, WM8940_DAC, mute_reg);
0b5e92c5
JC		 435}
436
437static int wm8940_set_bias_level(struct snd_soc_codec *codec,
438 enum snd_soc_bias_level level)
439{
440 u16 val;
8d50e447 441 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
0b5e92c5
JC		 442 int ret = 0;
443
444 switch (level) {
445 case SND_SOC_BIAS_ON:
446 /* ensure bufioen and biasen */
447 pwr_reg |= (1 << 2) | (1 << 3);
448 /* Enable thermal shutdown */
8d50e447
MB		 449 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
450 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
0b5e92c5
JC		 451 if (ret)
452 break;
453 /* set vmid to 75k */
8d50e447 454 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
0b5e92c5
JC		 455 break;
456 case SND_SOC_BIAS_PREPARE:
457 /* ensure bufioen and biasen */
458 pwr_reg |= (1 << 2) | (1 << 3);
8d50e447 459 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
0b5e92c5
JC		 460 break;
461 case SND_SOC_BIAS_STANDBY:
462 /* ensure bufioen and biasen */
463 pwr_reg |= (1 << 2) | (1 << 3);
464 /* set vmid to 300k for standby */
8d50e447 465 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
0b5e92c5
JC		 466 break;
467 case SND_SOC_BIAS_OFF:
8d50e447 468 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
0b5e92c5
JC		 469 break;
470 }
471
472 return ret;
473}
474
475struct pll_ {
476 unsigned int pre_scale:2;
477 unsigned int n:4;
478 unsigned int k;
479};
480
481static struct pll_ pll_div;
482
483/* The size in bits of the pll divide multiplied by 10
484 * to allow rounding later */
485#define FIXED_PLL_SIZE ((1 << 24) * 10)
486static void pll_factors(unsigned int target, unsigned int source)
487{
488 unsigned long long Kpart;
489 unsigned int K, Ndiv, Nmod;
490 /* The left shift ist to avoid accuracy loss when right shifting */
491 Ndiv = target / source;
492
493 if (Ndiv > 12) {
494 source <<= 1;
495 /* Multiply by 2 */
496 pll_div.pre_scale = 0;
497 Ndiv = target / source;
498 } else if (Ndiv < 3) {
499 source >>= 2;
500 /* Divide by 4 */
501 pll_div.pre_scale = 3;
502 Ndiv = target / source;
503 } else if (Ndiv < 6) {
504 source >>= 1;
505 /* divide by 2 */
506 pll_div.pre_scale = 2;
507 Ndiv = target / source;
508 } else
509 pll_div.pre_scale = 1;
510
511 if ((Ndiv < 6) || (Ndiv > 12))
512 printk(KERN_WARNING
513 "WM8940 N value %d outwith recommended range!d\n",
514 Ndiv);
515
516 pll_div.n = Ndiv;
517 Nmod = target % source;
518 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
519
520 do_div(Kpart, source);
521
522 K = Kpart & 0xFFFFFFFF;
523
524 /* Check if we need to round */
525 if ((K % 10) >= 5)
526 K += 5;
527
528 /* Move down to proper range now rounding is done */
529 K /= 10;
530
531 pll_div.k = K;
532}
533
534/* Untested at the moment */
85488037
MB		 535static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
536 int source, unsigned int freq_in, unsigned int freq_out)
0b5e92c5
JC		 537{
538 struct snd_soc_codec *codec = codec_dai->codec;
539 u16 reg;
540
541 /* Turn off PLL */
8d50e447
MB		 542 reg = snd_soc_read(codec, WM8940_POWER1);
543 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
0b5e92c5
JC		 544
545 if (freq_in == 0 || freq_out == 0) {
546 /* Clock CODEC directly from MCLK */
8d50e447
MB		 547 reg = snd_soc_read(codec, WM8940_CLOCK);
548 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
0b5e92c5 549 /* Pll power down */
8d50e447 550 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
0b5e92c5
JC		 551 return 0;
552 }
553
554 /* Pll is followed by a frequency divide by 4 */
555 pll_factors(freq_out*4, freq_in);
556 if (pll_div.k)
8d50e447 557 snd_soc_write(codec, WM8940_PLLN,
0b5e92c5
JC		 558 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
559 else /* No factional component */
8d50e447 560 snd_soc_write(codec, WM8940_PLLN,
0b5e92c5 561 (pll_div.pre_scale << 4) | pll_div.n);
8d50e447
MB		 562 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
563 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
564 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
0b5e92c5 565 /* Enable the PLL */
8d50e447
MB		 566 reg = snd_soc_read(codec, WM8940_POWER1);
567 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
0b5e92c5
JC		 568
569 /* Run CODEC from PLL instead of MCLK */
8d50e447
MB		 570 reg = snd_soc_read(codec, WM8940_CLOCK);
571 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
0b5e92c5
JC		 572
573 return 0;
574}
575
576static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
577 int clk_id, unsigned int freq, int dir)
578{
579 struct snd_soc_codec *codec = codec_dai->codec;
b2c812e2 580 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
0b5e92c5
JC		 581
582 switch (freq) {
583 case 11289600:
584 case 12000000:
585 case 12288000:
586 case 16934400:
587 case 18432000:
588 wm8940->sysclk = freq;
589 return 0;
590 }
591 return -EINVAL;
592}
593
594static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
595 int div_id, int div)
596{
597 struct snd_soc_codec *codec = codec_dai->codec;
598 u16 reg;
599 int ret = 0;
600
601 switch (div_id) {
602 case WM8940_BCLKDIV:
8d50e447
MB		 603 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
604 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
0b5e92c5
JC		 605 break;
606 case WM8940_MCLKDIV:
8d50e447
MB		 607 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
608 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
0b5e92c5
JC		 609 break;
610 case WM8940_OPCLKDIV:
8d50e447
MB		 611 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
612 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
0b5e92c5
JC		 613 break;
614 }
615 return ret;
616}
617
618#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
619
620#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
621 SNDRV_PCM_FMTBIT_S16_LE | \
622 SNDRV_PCM_FMTBIT_S20_3LE | \
623 SNDRV_PCM_FMTBIT_S24_LE | \
624 SNDRV_PCM_FMTBIT_S32_LE)
625
626static struct snd_soc_dai_ops wm8940_dai_ops = {
627 .hw_params = wm8940_i2s_hw_params,
628 .set_sysclk = wm8940_set_dai_sysclk,
629 .digital_mute = wm8940_mute,
630 .set_fmt = wm8940_set_dai_fmt,
631 .set_clkdiv = wm8940_set_dai_clkdiv,
632 .set_pll = wm8940_set_dai_pll,
633};
634
f0fba2ad
LG		 635static struct snd_soc_dai_driver wm8940_dai = {
636 .name = "wm8940-hifi",
0b5e92c5
JC		 637 .playback = {
638 .stream_name = "Playback",
639 .channels_min = 1,
640 .channels_max = 2,
641 .rates = WM8940_RATES,
642 .formats = WM8940_FORMATS,
643 },
644 .capture = {
645 .stream_name = "Capture",
646 .channels_min = 1,
647 .channels_max = 2,
648 .rates = WM8940_RATES,
649 .formats = WM8940_FORMATS,
650 },
651 .ops = &wm8940_dai_ops,
652 .symmetric_rates = 1,
653};
0b5e92c5 654
f0fba2ad 655static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state)
0b5e92c5 656{
0b5e92c5
JC		 657 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
658}
659
f0fba2ad 660static int wm8940_resume(struct snd_soc_codec *codec)
0b5e92c5 661{
0b5e92c5
JC		 662 int i;
663 int ret;
664 u8 data[3];
665 u16 *cache = codec->reg_cache;
666
667 /* Sync reg_cache with the hardware
668 * Could use auto incremented writes to speed this up
669 */
670 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
671 data[0] = i;
672 data[1] = (cache[i] & 0xFF00) >> 8;
673 data[2] = cache[i] & 0x00FF;
674 ret = codec->hw_write(codec->control_data, data, 3);
675 if (ret < 0)
676 goto error_ret;
677 else if (ret != 3) {
678 ret = -EIO;
679 goto error_ret;
680 }
681 }
682 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
0b5e92c5
JC		 683
684error_ret:
685 return ret;
686}
687
f0fba2ad 688static int wm8940_probe(struct snd_soc_codec *codec)
0b5e92c5 689{
f0fba2ad
LG		 690 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
691 struct wm8940_setup_data *pdata = codec->dev->platform_data;
0b5e92c5
JC		 692 int ret;
693 u16 reg;
0b5e92c5 694
f0fba2ad 695 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
e655a435 696 if (ret < 0) {
8d50e447
MB		 697 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
698 return ret;
699 }
700
0b5e92c5
JC		 701 ret = wm8940_reset(codec);
702 if (ret < 0) {
703 dev_err(codec->dev, "Failed to issue reset\n");
704 return ret;
705 }
706
0b5e92c5
JC		 707 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
708
8d50e447 709 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
0b5e92c5
JC		 710 if (ret < 0)
711 return ret;
712
713 if (!pdata)
714 dev_warn(codec->dev, "No platform data supplied\n");
715 else {
8d50e447
MB		 716 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
717 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
0b5e92c5
JC		 718 if (ret < 0)
719 return ret;
720 }
721
f0fba2ad
LG		 722 ret = snd_soc_add_controls(codec, wm8940_snd_controls,
723 ARRAY_SIZE(wm8940_snd_controls));
724 if (ret)
0b5e92c5 725 return ret;
f0fba2ad 726 ret = wm8940_add_widgets(codec);
f0fba2ad 727 return ret;
0b5e92c5
JC		 728}
729
f0fba2ad 730static int wm8940_remove(struct snd_soc_codec *codec)
0b5e92c5 731{
f0fba2ad
LG		 732 wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
733 return 0;
0b5e92c5
JC		 734}
735
f0fba2ad
LG		 736static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
737 .probe = wm8940_probe,
738 .remove = wm8940_remove,
739 .suspend = wm8940_suspend,
740 .resume = wm8940_resume,
741 .set_bias_level = wm8940_set_bias_level,
e5eec34c 742 .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
f0fba2ad
LG		 743 .reg_word_size = sizeof(u16),
744 .reg_cache_default = wm8940_reg_defaults,
745};
746
747#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
748static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
749 const struct i2c_device_id *id)
0b5e92c5
JC		 750{
751 struct wm8940_priv *wm8940;
f0fba2ad 752 int ret;
0b5e92c5 753
f0fba2ad 754 wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL);
0b5e92c5
JC		 755 if (wm8940 == NULL)
756 return -ENOMEM;
757
0b5e92c5 758 i2c_set_clientdata(i2c, wm8940);
7f984b55 759 wm8940->control_type = SND_SOC_I2C;
0b5e92c5 760
f0fba2ad
LG		 761 ret = snd_soc_register_codec(&i2c->dev,
762 &soc_codec_dev_wm8940, &wm8940_dai, 1);
db1e18de
AL		 763 if (ret < 0)
764 kfree(wm8940);
db1e18de 765 return ret;
0b5e92c5
JC		 766}
767
f0fba2ad 768static __devexit int wm8940_i2c_remove(struct i2c_client *client)
0b5e92c5 769{
f0fba2ad
LG		 770 snd_soc_unregister_codec(&client->dev);
771 kfree(i2c_get_clientdata(client));
0b5e92c5
JC		 772 return 0;
773}
774
775static const struct i2c_device_id wm8940_i2c_id[] = {
776 { "wm8940", 0 },
777 { }
778};
779MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
780
781static struct i2c_driver wm8940_i2c_driver = {
782 .driver = {
f0fba2ad 783 .name = "wm8940-codec",
0b5e92c5
JC		 784 .owner = THIS_MODULE,
785 },
f0fba2ad
LG		 786 .probe = wm8940_i2c_probe,
787 .remove = __devexit_p(wm8940_i2c_remove),
0b5e92c5
JC		 788 .id_table = wm8940_i2c_id,
789};
f0fba2ad 790#endif
0b5e92c5
JC		 791
792static int __init wm8940_modinit(void)
793{
f0fba2ad
LG		 794 int ret = 0;
795#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
0b5e92c5 796 ret = i2c_add_driver(&wm8940_i2c_driver);
f0fba2ad
LG		 797 if (ret != 0) {
798 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n",
0b5e92c5 799 ret);
f0fba2ad
LG		 800 }
801#endif
0b5e92c5
JC		 802 return ret;
803}
804module_init(wm8940_modinit);
805
806static void __exit wm8940_exit(void)
807{
f0fba2ad 808#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
0b5e92c5 809 i2c_del_driver(&wm8940_i2c_driver);
f0fba2ad 810#endif
0b5e92c5
JC		 811}
812module_exit(wm8940_exit);
813
814MODULE_DESCRIPTION("ASoC WM8940 driver");
815MODULE_AUTHOR("Jonathan Cameron");
816MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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