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-rw-r--r--sound/soc/codecs/wm8940.c933
1 files changed, 933 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
new file mode 100644
index 000000000000..da97aae475a2
--- /dev/null
+++ b/sound/soc/codecs/wm8940.c
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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 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
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);
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
212static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
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;
301 ret = snd_soc_dapm_new_widgets(codec);
302
303error_ret:
304 return ret;
305}
306
307#define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
308
309static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
310 unsigned int fmt)
311{
312 struct snd_soc_codec *codec = codec_dai->codec;
313 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
314 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
315
316 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
317 case SND_SOC_DAIFMT_CBM_CFM:
318 clk |= 1;
319 break;
320 case SND_SOC_DAIFMT_CBS_CFS:
321 break;
322 default:
323 return -EINVAL;
324 }
325 snd_soc_write(codec, WM8940_CLOCK, clk);
326
327 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
328 case SND_SOC_DAIFMT_I2S:
329 iface |= (2 << 3);
330 break;
331 case SND_SOC_DAIFMT_LEFT_J:
332 iface |= (1 << 3);
333 break;
334 case SND_SOC_DAIFMT_RIGHT_J:
335 break;
336 case SND_SOC_DAIFMT_DSP_A:
337 iface |= (3 << 3);
338 break;
339 case SND_SOC_DAIFMT_DSP_B:
340 iface |= (3 << 3) | (1 << 7);
341 break;
342 }
343
344 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
345 case SND_SOC_DAIFMT_NB_NF:
346 break;
347 case SND_SOC_DAIFMT_NB_IF:
348 iface |= (1 << 7);
349 break;
350 case SND_SOC_DAIFMT_IB_NF:
351 iface |= (1 << 8);
352 break;
353 case SND_SOC_DAIFMT_IB_IF:
354 iface |= (1 << 8) | (1 << 7);
355 break;
356 }
357
358 snd_soc_write(codec, WM8940_IFACE, iface);
359
360 return 0;
361}
362
363static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
364 struct snd_pcm_hw_params *params,
365 struct snd_soc_dai *dai)
366{
367 struct snd_soc_pcm_runtime *rtd = substream->private_data;
368 struct snd_soc_device *socdev = rtd->socdev;
369 struct snd_soc_codec *codec = socdev->card->codec;
370 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
371 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
372 u16 companding = snd_soc_read(codec,
373 WM8940_COMPANDINGCTL) & 0xFFDF;
374 int ret;
375
376 /* LoutR control */
377 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
378 && params_channels(params) == 2)
379 iface |= (1 << 9);
380
381 switch (params_rate(params)) {
382 case SNDRV_PCM_RATE_8000:
383 addcntrl |= (0x5 << 1);
384 break;
385 case SNDRV_PCM_RATE_11025:
386 addcntrl |= (0x4 << 1);
387 break;
388 case SNDRV_PCM_RATE_16000:
389 addcntrl |= (0x3 << 1);
390 break;
391 case SNDRV_PCM_RATE_22050:
392 addcntrl |= (0x2 << 1);
393 break;
394 case SNDRV_PCM_RATE_32000:
395 addcntrl |= (0x1 << 1);
396 break;
397 case SNDRV_PCM_RATE_44100:
398 case SNDRV_PCM_RATE_48000:
399 break;
400 }
401 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
402 if (ret)
403 goto error_ret;
404
405 switch (params_format(params)) {
406 case SNDRV_PCM_FORMAT_S8:
407 companding = companding | (1 << 5);
408 break;
409 case SNDRV_PCM_FORMAT_S16_LE:
410 break;
411 case SNDRV_PCM_FORMAT_S20_3LE:
412 iface |= (1 << 5);
413 break;
414 case SNDRV_PCM_FORMAT_S24_LE:
415 iface |= (2 << 5);
416 break;
417 case SNDRV_PCM_FORMAT_S32_LE:
418 iface |= (3 << 5);
419 break;
420 }
421 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
422 if (ret)
423 goto error_ret;
424 ret = snd_soc_write(codec, WM8940_IFACE, iface);
425
426error_ret:
427 return ret;
428}
429
430static int wm8940_mute(struct snd_soc_dai *dai, int mute)
431{
432 struct snd_soc_codec *codec = dai->codec;
433 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
434
435 if (mute)
436 mute_reg |= 0x40;
437
438 return snd_soc_write(codec, WM8940_DAC, mute_reg);
439}
440
441static int wm8940_set_bias_level(struct snd_soc_codec *codec,
442 enum snd_soc_bias_level level)
443{
444 u16 val;
445 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
446 int ret = 0;
447
448 switch (level) {
449 case SND_SOC_BIAS_ON:
450 /* ensure bufioen and biasen */
451 pwr_reg |= (1 << 2) | (1 << 3);
452 /* Enable thermal shutdown */
453 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
454 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
455 if (ret)
456 break;
457 /* set vmid to 75k */
458 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
459 break;
460 case SND_SOC_BIAS_PREPARE:
461 /* ensure bufioen and biasen */
462 pwr_reg |= (1 << 2) | (1 << 3);
463 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
464 break;
465 case SND_SOC_BIAS_STANDBY:
466 /* ensure bufioen and biasen */
467 pwr_reg |= (1 << 2) | (1 << 3);
468 /* set vmid to 300k for standby */
469 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
470 break;
471 case SND_SOC_BIAS_OFF:
472 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
473 break;
474 }
475
476 return ret;
477}
478
479struct pll_ {
480 unsigned int pre_scale:2;
481 unsigned int n:4;
482 unsigned int k;
483};
484
485static struct pll_ pll_div;
486
487/* The size in bits of the pll divide multiplied by 10
488 * to allow rounding later */
489#define FIXED_PLL_SIZE ((1 << 24) * 10)
490static void pll_factors(unsigned int target, unsigned int source)
491{
492 unsigned long long Kpart;
493 unsigned int K, Ndiv, Nmod;
494 /* The left shift ist to avoid accuracy loss when right shifting */
495 Ndiv = target / source;
496
497 if (Ndiv > 12) {
498 source <<= 1;
499 /* Multiply by 2 */
500 pll_div.pre_scale = 0;
501 Ndiv = target / source;
502 } else if (Ndiv < 3) {
503 source >>= 2;
504 /* Divide by 4 */
505 pll_div.pre_scale = 3;
506 Ndiv = target / source;
507 } else if (Ndiv < 6) {
508 source >>= 1;
509 /* divide by 2 */
510 pll_div.pre_scale = 2;
511 Ndiv = target / source;
512 } else
513 pll_div.pre_scale = 1;
514
515 if ((Ndiv < 6) || (Ndiv > 12))
516 printk(KERN_WARNING
517 "WM8940 N value %d outwith recommended range!d\n",
518 Ndiv);
519
520 pll_div.n = Ndiv;
521 Nmod = target % source;
522 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
523
524 do_div(Kpart, source);
525
526 K = Kpart & 0xFFFFFFFF;
527
528 /* Check if we need to round */
529 if ((K % 10) >= 5)
530 K += 5;
531
532 /* Move down to proper range now rounding is done */
533 K /= 10;
534
535 pll_div.k = K;
536}
537
538/* Untested at the moment */
539static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai,
540 int pll_id, unsigned int freq_in, unsigned int freq_out)
541{
542 struct snd_soc_codec *codec = codec_dai->codec;
543 u16 reg;
544
545 /* Turn off PLL */
546 reg = snd_soc_read(codec, WM8940_POWER1);
547 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
548
549 if (freq_in == 0 || freq_out == 0) {
550 /* Clock CODEC directly from MCLK */
551 reg = snd_soc_read(codec, WM8940_CLOCK);
552 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
553 /* Pll power down */
554 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
555 return 0;
556 }
557
558 /* Pll is followed by a frequency divide by 4 */
559 pll_factors(freq_out*4, freq_in);
560 if (pll_div.k)
561 snd_soc_write(codec, WM8940_PLLN,
562 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
563 else /* No factional component */
564 snd_soc_write(codec, WM8940_PLLN,
565 (pll_div.pre_scale << 4) | pll_div.n);
566 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
567 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
568 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
569 /* Enable the PLL */
570 reg = snd_soc_read(codec, WM8940_POWER1);
571 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
572
573 /* Run CODEC from PLL instead of MCLK */
574 reg = snd_soc_read(codec, WM8940_CLOCK);
575 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
576
577 return 0;
578}
579
580static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
581 int clk_id, unsigned int freq, int dir)
582{
583 struct snd_soc_codec *codec = codec_dai->codec;
584 struct wm8940_priv *wm8940 = codec->private_data;
585
586 switch (freq) {
587 case 11289600:
588 case 12000000:
589 case 12288000:
590 case 16934400:
591 case 18432000:
592 wm8940->sysclk = freq;
593 return 0;
594 }
595 return -EINVAL;
596}
597
598static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
599 int div_id, int div)
600{
601 struct snd_soc_codec *codec = codec_dai->codec;
602 u16 reg;
603 int ret = 0;
604
605 switch (div_id) {
606 case WM8940_BCLKDIV:
607 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
608 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
609 break;
610 case WM8940_MCLKDIV:
611 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
612 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
613 break;
614 case WM8940_OPCLKDIV:
615 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
616 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
617 break;
618 }
619 return ret;
620}
621
622#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
623
624#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
625 SNDRV_PCM_FMTBIT_S16_LE | \
626 SNDRV_PCM_FMTBIT_S20_3LE | \
627 SNDRV_PCM_FMTBIT_S24_LE | \
628 SNDRV_PCM_FMTBIT_S32_LE)
629
630static struct snd_soc_dai_ops wm8940_dai_ops = {
631 .hw_params = wm8940_i2s_hw_params,
632 .set_sysclk = wm8940_set_dai_sysclk,
633 .digital_mute = wm8940_mute,
634 .set_fmt = wm8940_set_dai_fmt,
635 .set_clkdiv = wm8940_set_dai_clkdiv,
636 .set_pll = wm8940_set_dai_pll,
637};
638
639struct snd_soc_dai wm8940_dai = {
640 .name = "WM8940",
641 .playback = {
642 .stream_name = "Playback",
643 .channels_min = 1,
644 .channels_max = 2,
645 .rates = WM8940_RATES,
646 .formats = WM8940_FORMATS,
647 },
648 .capture = {
649 .stream_name = "Capture",
650 .channels_min = 1,
651 .channels_max = 2,
652 .rates = WM8940_RATES,
653 .formats = WM8940_FORMATS,
654 },
655 .ops = &wm8940_dai_ops,
656 .symmetric_rates = 1,
657};
658EXPORT_SYMBOL_GPL(wm8940_dai);
659
660static int wm8940_suspend(struct platform_device *pdev, pm_message_t state)
661{
662 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
663 struct snd_soc_codec *codec = socdev->card->codec;
664
665 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
666}
667
668static int wm8940_resume(struct platform_device *pdev)
669{
670 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
671 struct snd_soc_codec *codec = socdev->card->codec;
672 int i;
673 int ret;
674 u8 data[3];
675 u16 *cache = codec->reg_cache;
676
677 /* Sync reg_cache with the hardware
678 * Could use auto incremented writes to speed this up
679 */
680 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
681 data[0] = i;
682 data[1] = (cache[i] & 0xFF00) >> 8;
683 data[2] = cache[i] & 0x00FF;
684 ret = codec->hw_write(codec->control_data, data, 3);
685 if (ret < 0)
686 goto error_ret;
687 else if (ret != 3) {
688 ret = -EIO;
689 goto error_ret;
690 }
691 }
692 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
693 if (ret)
694 goto error_ret;
695 ret = wm8940_set_bias_level(codec, codec->suspend_bias_level);
696
697error_ret:
698 return ret;
699}
700
701static struct snd_soc_codec *wm8940_codec;
702
703static int wm8940_probe(struct platform_device *pdev)
704{
705 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
706 struct snd_soc_codec *codec;
707
708 int ret = 0;
709
710 if (wm8940_codec == NULL) {
711 dev_err(&pdev->dev, "Codec device not registered\n");
712 return -ENODEV;
713 }
714
715 socdev->card->codec = wm8940_codec;
716 codec = wm8940_codec;
717
718 mutex_init(&codec->mutex);
719 /* register pcms */
720 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
721 if (ret < 0) {
722 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
723 goto pcm_err;
724 }
725
726 ret = snd_soc_add_controls(codec, wm8940_snd_controls,
727 ARRAY_SIZE(wm8940_snd_controls));
728 if (ret)
729 goto error_free_pcms;
730 ret = wm8940_add_widgets(codec);
731 if (ret)
732 goto error_free_pcms;
733
734 ret = snd_soc_init_card(socdev);
735 if (ret < 0) {
736 dev_err(codec->dev, "failed to register card: %d\n", ret);
737 goto error_free_pcms;
738 }
739
740 return ret;
741
742error_free_pcms:
743 snd_soc_free_pcms(socdev);
744 snd_soc_dapm_free(socdev);
745pcm_err:
746 return ret;
747}
748
749static int wm8940_remove(struct platform_device *pdev)
750{
751 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
752
753 snd_soc_free_pcms(socdev);
754 snd_soc_dapm_free(socdev);
755
756 return 0;
757}
758
759struct snd_soc_codec_device soc_codec_dev_wm8940 = {
760 .probe = wm8940_probe,
761 .remove = wm8940_remove,
762 .suspend = wm8940_suspend,
763 .resume = wm8940_resume,
764};
765EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940);
766
767static int wm8940_register(struct wm8940_priv *wm8940,
768 enum snd_soc_control_type control)
769{
770 struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data;
771 struct snd_soc_codec *codec = &wm8940->codec;
772 int ret;
773 u16 reg;
774 if (wm8940_codec) {
775 dev_err(codec->dev, "Another WM8940 is registered\n");
776 return -EINVAL;
777 }
778
779 INIT_LIST_HEAD(&codec->dapm_widgets);
780 INIT_LIST_HEAD(&codec->dapm_paths);
781
782 codec->private_data = wm8940;
783 codec->name = "WM8940";
784 codec->owner = THIS_MODULE;
785 codec->bias_level = SND_SOC_BIAS_OFF;
786 codec->set_bias_level = wm8940_set_bias_level;
787 codec->dai = &wm8940_dai;
788 codec->num_dai = 1;
789 codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults);
790 codec->reg_cache = &wm8940->reg_cache;
791
792 ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
793 if (ret == 0) {
794 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
795 return ret;
796 }
797
798 memcpy(codec->reg_cache, wm8940_reg_defaults,
799 sizeof(wm8940_reg_defaults));
800
801 ret = wm8940_reset(codec);
802 if (ret < 0) {
803 dev_err(codec->dev, "Failed to issue reset\n");
804 return ret;
805 }
806
807 wm8940_dai.dev = codec->dev;
808
809 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
810
811 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
812 if (ret < 0)
813 return ret;
814
815 if (!pdata)
816 dev_warn(codec->dev, "No platform data supplied\n");
817 else {
818 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
819 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
820 if (ret < 0)
821 return ret;
822 }
823
824
825 wm8940_codec = codec;
826
827 ret = snd_soc_register_codec(codec);
828 if (ret) {
829 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
830 return ret;
831 }
832
833 ret = snd_soc_register_dai(&wm8940_dai);
834 if (ret) {
835 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
836 snd_soc_unregister_codec(codec);
837 return ret;
838 }
839
840 return 0;
841}
842
843static void wm8940_unregister(struct wm8940_priv *wm8940)
844{
845 wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF);
846 snd_soc_unregister_dai(&wm8940_dai);
847 snd_soc_unregister_codec(&wm8940->codec);
848 kfree(wm8940);
849 wm8940_codec = NULL;
850}
851
852static int wm8940_i2c_probe(struct i2c_client *i2c,
853 const struct i2c_device_id *id)
854{
855 struct wm8940_priv *wm8940;
856 struct snd_soc_codec *codec;
857
858 wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL);
859 if (wm8940 == NULL)
860 return -ENOMEM;
861
862 codec = &wm8940->codec;
863 codec->hw_write = (hw_write_t)i2c_master_send;
864 i2c_set_clientdata(i2c, wm8940);
865 codec->control_data = i2c;
866 codec->dev = &i2c->dev;
867
868 return wm8940_register(wm8940, SND_SOC_I2C);
869}
870
871static int __devexit wm8940_i2c_remove(struct i2c_client *client)
872{
873 struct wm8940_priv *wm8940 = i2c_get_clientdata(client);
874
875 wm8940_unregister(wm8940);
876
877 return 0;
878}
879
880#ifdef CONFIG_PM
881static int wm8940_i2c_suspend(struct i2c_client *client, pm_message_t msg)
882{
883 return snd_soc_suspend_device(&client->dev);
884}
885
886static int wm8940_i2c_resume(struct i2c_client *client)
887{
888 return snd_soc_resume_device(&client->dev);
889}
890#else
891#define wm8940_i2c_suspend NULL
892#define wm8940_i2c_resume NULL
893#endif
894
895static const struct i2c_device_id wm8940_i2c_id[] = {
896 { "wm8940", 0 },
897 { }
898};
899MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
900
901static struct i2c_driver wm8940_i2c_driver = {
902 .driver = {
903 .name = "WM8940 I2C Codec",
904 .owner = THIS_MODULE,
905 },
906 .probe = wm8940_i2c_probe,
907 .remove = __devexit_p(wm8940_i2c_remove),
908 .suspend = wm8940_i2c_suspend,
909 .resume = wm8940_i2c_resume,
910 .id_table = wm8940_i2c_id,
911};
912
913static int __init wm8940_modinit(void)
914{
915 int ret;
916
917 ret = i2c_add_driver(&wm8940_i2c_driver);
918 if (ret)
919 printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n",
920 ret);
921 return ret;
922}
923module_init(wm8940_modinit);
924
925static void __exit wm8940_exit(void)
926{
927 i2c_del_driver(&wm8940_i2c_driver);
928}
929module_exit(wm8940_exit);
930
931MODULE_DESCRIPTION("ASoC WM8940 driver");
932MODULE_AUTHOR("Jonathan Cameron");
933MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-01 06:46:45 -0500