1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * wm8940.c -- WM8940 ALSA Soc Audio driver
4 *
5 * Author: Jonathan Cameron <jic23@cam.ac.uk>
6 *
7 * Based on wm8510.c
8 * Copyright 2006 Wolfson Microelectronics PLC.
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 *
11 * Not currently handled:
12 * Notch filter control
13 * AUXMode (inverting vs mixer)
14 * No means to obtain current gain if alc enabled.
15 * No use made of gpio
16 * Fast VMID discharge for power down
17 * Soft Start
18 * DLR and ALR Swaps not enabled
19 * Digital Sidetone not supported
20 */
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/delay.h>
26 #include <linux/pm.h>
27 #include <linux/i2c.h>
28 #include <linux/regmap.h>
29 #include <linux/slab.h>
30 #include <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/soc.h>
34 #include <sound/initval.h>
35 #include <sound/tlv.h>
36
37 #include "wm8940.h"
38
39 struct wm8940_priv {
40 unsigned int sysclk;
41 struct regmap *regmap;
42 };
43
wm8940_volatile_register(struct device * dev,unsigned int reg)44 static bool wm8940_volatile_register(struct device *dev, unsigned int reg)
45 {
46 switch (reg) {
47 case WM8940_SOFTRESET:
48 return true;
49 default:
50 return false;
51 }
52 }
53
wm8940_readable_register(struct device * dev,unsigned int reg)54 static bool wm8940_readable_register(struct device *dev, unsigned int reg)
55 {
56 switch (reg) {
57 case WM8940_SOFTRESET:
58 case WM8940_POWER1:
59 case WM8940_POWER2:
60 case WM8940_POWER3:
61 case WM8940_IFACE:
62 case WM8940_COMPANDINGCTL:
63 case WM8940_CLOCK:
64 case WM8940_ADDCNTRL:
65 case WM8940_GPIO:
66 case WM8940_CTLINT:
67 case WM8940_DAC:
68 case WM8940_DACVOL:
69 case WM8940_ADC:
70 case WM8940_ADCVOL:
71 case WM8940_NOTCH1:
72 case WM8940_NOTCH2:
73 case WM8940_NOTCH3:
74 case WM8940_NOTCH4:
75 case WM8940_NOTCH5:
76 case WM8940_NOTCH6:
77 case WM8940_NOTCH7:
78 case WM8940_NOTCH8:
79 case WM8940_DACLIM1:
80 case WM8940_DACLIM2:
81 case WM8940_ALC1:
82 case WM8940_ALC2:
83 case WM8940_ALC3:
84 case WM8940_NOISEGATE:
85 case WM8940_PLLN:
86 case WM8940_PLLK1:
87 case WM8940_PLLK2:
88 case WM8940_PLLK3:
89 case WM8940_ALC4:
90 case WM8940_INPUTCTL:
91 case WM8940_PGAGAIN:
92 case WM8940_ADCBOOST:
93 case WM8940_OUTPUTCTL:
94 case WM8940_SPKMIX:
95 case WM8940_SPKVOL:
96 case WM8940_MONOMIX:
97 return true;
98 default:
99 return false;
100 }
101 }
102
103 static const struct reg_default wm8940_reg_defaults[] = {
104 { 0x1, 0x0000 }, /* Power 1 */
105 { 0x2, 0x0000 }, /* Power 2 */
106 { 0x3, 0x0000 }, /* Power 3 */
107 { 0x4, 0x0010 }, /* Interface Control */
108 { 0x5, 0x0000 }, /* Companding Control */
109 { 0x6, 0x0140 }, /* Clock Control */
110 { 0x7, 0x0000 }, /* Additional Controls */
111 { 0x8, 0x0000 }, /* GPIO Control */
112 { 0x9, 0x0002 }, /* Auto Increment Control */
113 { 0xa, 0x0000 }, /* DAC Control */
114 { 0xb, 0x00FF }, /* DAC Volume */
115
116 { 0xe, 0x0100 }, /* ADC Control */
117 { 0xf, 0x00FF }, /* ADC Volume */
118 { 0x10, 0x0000 }, /* Notch Filter 1 Control 1 */
119 { 0x11, 0x0000 }, /* Notch Filter 1 Control 2 */
120 { 0x12, 0x0000 }, /* Notch Filter 2 Control 1 */
121 { 0x13, 0x0000 }, /* Notch Filter 2 Control 2 */
122 { 0x14, 0x0000 }, /* Notch Filter 3 Control 1 */
123 { 0x15, 0x0000 }, /* Notch Filter 3 Control 2 */
124 { 0x16, 0x0000 }, /* Notch Filter 4 Control 1 */
125 { 0x17, 0x0000 }, /* Notch Filter 4 Control 2 */
126 { 0x18, 0x0032 }, /* DAC Limit Control 1 */
127 { 0x19, 0x0000 }, /* DAC Limit Control 2 */
128
129 { 0x20, 0x0038 }, /* ALC Control 1 */
130 { 0x21, 0x000B }, /* ALC Control 2 */
131 { 0x22, 0x0032 }, /* ALC Control 3 */
132 { 0x23, 0x0000 }, /* Noise Gate */
133 { 0x24, 0x0041 }, /* PLLN */
134 { 0x25, 0x000C }, /* PLLK1 */
135 { 0x26, 0x0093 }, /* PLLK2 */
136 { 0x27, 0x00E9 }, /* PLLK3 */
137
138 { 0x2a, 0x0030 }, /* ALC Control 4 */
139
140 { 0x2c, 0x0002 }, /* Input Control */
141 { 0x2d, 0x0050 }, /* PGA Gain */
142
143 { 0x2f, 0x0002 }, /* ADC Boost Control */
144
145 { 0x31, 0x0002 }, /* Output Control */
146 { 0x32, 0x0000 }, /* Speaker Mixer Control */
147
148 { 0x36, 0x0079 }, /* Speaker Volume */
149
150 { 0x38, 0x0000 }, /* Mono Mixer Control */
151 };
152
153 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
154 static SOC_ENUM_SINGLE_DECL(wm8940_adc_companding_enum,
155 WM8940_COMPANDINGCTL, 1, wm8940_companding);
156 static SOC_ENUM_SINGLE_DECL(wm8940_dac_companding_enum,
157 WM8940_COMPANDINGCTL, 3, wm8940_companding);
158
159 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
160 static SOC_ENUM_SINGLE_DECL(wm8940_alc_mode_enum,
161 WM8940_ALC3, 8, wm8940_alc_mode_text);
162
163 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
164 static SOC_ENUM_SINGLE_DECL(wm8940_mic_bias_level_enum,
165 WM8940_INPUTCTL, 8, wm8940_mic_bias_level_text);
166
167 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
168 static SOC_ENUM_SINGLE_DECL(wm8940_filter_mode_enum,
169 WM8940_ADC, 7, wm8940_filter_mode_text);
170
171 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
172 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
173 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
174 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
175 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
176 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
177 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
178 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
179 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
180 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
181
182 static 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
244 static 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
250 static 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
256 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
257 static 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
265 static 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
271 static 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
302 static const struct snd_soc_dapm_route wm8940_dapm_routes[] = {
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
334 #define wm8940_reset(c) snd_soc_component_write(c, WM8940_SOFTRESET, 0);
335
wm8940_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)336 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
337 unsigned int fmt)
338 {
339 struct snd_soc_component *component = codec_dai->component;
340 u16 iface = snd_soc_component_read(component, WM8940_IFACE) & 0xFE67;
341 u16 clk = snd_soc_component_read(component, WM8940_CLOCK) & 0x1fe;
342
343 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
344 case SND_SOC_DAIFMT_CBM_CFM:
345 clk |= 1;
346 break;
347 case SND_SOC_DAIFMT_CBS_CFS:
348 break;
349 default:
350 return -EINVAL;
351 }
352 snd_soc_component_write(component, WM8940_CLOCK, clk);
353
354 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
355 case SND_SOC_DAIFMT_I2S:
356 iface |= (2 << 3);
357 break;
358 case SND_SOC_DAIFMT_LEFT_J:
359 iface |= (1 << 3);
360 break;
361 case SND_SOC_DAIFMT_RIGHT_J:
362 break;
363 case SND_SOC_DAIFMT_DSP_A:
364 iface |= (3 << 3);
365 break;
366 case SND_SOC_DAIFMT_DSP_B:
367 iface |= (3 << 3) | (1 << 7);
368 break;
369 }
370
371 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
372 case SND_SOC_DAIFMT_NB_NF:
373 break;
374 case SND_SOC_DAIFMT_NB_IF:
375 iface |= (1 << 7);
376 break;
377 case SND_SOC_DAIFMT_IB_NF:
378 iface |= (1 << 8);
379 break;
380 case SND_SOC_DAIFMT_IB_IF:
381 iface |= (1 << 8) | (1 << 7);
382 break;
383 }
384
385 snd_soc_component_write(component, WM8940_IFACE, iface);
386
387 return 0;
388 }
389
wm8940_i2s_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)390 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
391 struct snd_pcm_hw_params *params,
392 struct snd_soc_dai *dai)
393 {
394 struct snd_soc_component *component = dai->component;
395 u16 iface = snd_soc_component_read(component, WM8940_IFACE) & 0xFD9F;
396 u16 addcntrl = snd_soc_component_read(component, WM8940_ADDCNTRL) & 0xFFF1;
397 u16 companding = snd_soc_component_read(component,
398 WM8940_COMPANDINGCTL) & 0xFFDF;
399 int ret;
400
401 /* LoutR control */
402 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
403 && params_channels(params) == 2)
404 iface |= (1 << 9);
405
406 switch (params_rate(params)) {
407 case 8000:
408 addcntrl |= (0x5 << 1);
409 break;
410 case 11025:
411 addcntrl |= (0x4 << 1);
412 break;
413 case 16000:
414 addcntrl |= (0x3 << 1);
415 break;
416 case 22050:
417 addcntrl |= (0x2 << 1);
418 break;
419 case 32000:
420 addcntrl |= (0x1 << 1);
421 break;
422 case 44100:
423 case 48000:
424 break;
425 }
426 ret = snd_soc_component_write(component, WM8940_ADDCNTRL, addcntrl);
427 if (ret)
428 goto error_ret;
429
430 switch (params_width(params)) {
431 case 8:
432 companding = companding | (1 << 5);
433 break;
434 case 16:
435 break;
436 case 20:
437 iface |= (1 << 5);
438 break;
439 case 24:
440 iface |= (2 << 5);
441 break;
442 case 32:
443 iface |= (3 << 5);
444 break;
445 }
446 ret = snd_soc_component_write(component, WM8940_COMPANDINGCTL, companding);
447 if (ret)
448 goto error_ret;
449 ret = snd_soc_component_write(component, WM8940_IFACE, iface);
450
451 error_ret:
452 return ret;
453 }
454
wm8940_mute(struct snd_soc_dai * dai,int mute,int direction)455 static int wm8940_mute(struct snd_soc_dai *dai, int mute, int direction)
456 {
457 struct snd_soc_component *component = dai->component;
458 u16 mute_reg = snd_soc_component_read(component, WM8940_DAC) & 0xffbf;
459
460 if (mute)
461 mute_reg |= 0x40;
462
463 return snd_soc_component_write(component, WM8940_DAC, mute_reg);
464 }
465
wm8940_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)466 static int wm8940_set_bias_level(struct snd_soc_component *component,
467 enum snd_soc_bias_level level)
468 {
469 struct wm8940_priv *wm8940 = snd_soc_component_get_drvdata(component);
470 u16 val;
471 u16 pwr_reg = snd_soc_component_read(component, WM8940_POWER1) & 0x1F0;
472 int ret = 0;
473
474 switch (level) {
475 case SND_SOC_BIAS_ON:
476 /* ensure bufioen and biasen */
477 pwr_reg |= (1 << 2) | (1 << 3);
478 /* Enable thermal shutdown */
479 val = snd_soc_component_read(component, WM8940_OUTPUTCTL);
480 ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, val | 0x2);
481 if (ret)
482 break;
483 /* set vmid to 75k */
484 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x1);
485 break;
486 case SND_SOC_BIAS_PREPARE:
487 /* ensure bufioen and biasen */
488 pwr_reg |= (1 << 2) | (1 << 3);
489 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x1);
490 break;
491 case SND_SOC_BIAS_STANDBY:
492 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
493 ret = regcache_sync(wm8940->regmap);
494 if (ret < 0) {
495 dev_err(component->dev, "Failed to sync cache: %d\n", ret);
496 return ret;
497 }
498 }
499
500 /* ensure bufioen and biasen */
501 pwr_reg |= (1 << 2) | (1 << 3);
502 /* set vmid to 300k for standby */
503 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg | 0x2);
504 break;
505 case SND_SOC_BIAS_OFF:
506 ret = snd_soc_component_write(component, WM8940_POWER1, pwr_reg);
507 break;
508 }
509
510 return ret;
511 }
512
513 struct pll_ {
514 unsigned int pre_scale:2;
515 unsigned int n:4;
516 unsigned int k;
517 };
518
519 static struct pll_ pll_div;
520
521 /* The size in bits of the pll divide multiplied by 10
522 * to allow rounding later */
523 #define FIXED_PLL_SIZE ((1 << 24) * 10)
pll_factors(unsigned int target,unsigned int source)524 static void pll_factors(unsigned int target, unsigned int source)
525 {
526 unsigned long long Kpart;
527 unsigned int K, Ndiv, Nmod;
528 /* The left shift ist to avoid accuracy loss when right shifting */
529 Ndiv = target / source;
530
531 if (Ndiv > 12) {
532 source <<= 1;
533 /* Multiply by 2 */
534 pll_div.pre_scale = 0;
535 Ndiv = target / source;
536 } else if (Ndiv < 3) {
537 source >>= 2;
538 /* Divide by 4 */
539 pll_div.pre_scale = 3;
540 Ndiv = target / source;
541 } else if (Ndiv < 6) {
542 source >>= 1;
543 /* divide by 2 */
544 pll_div.pre_scale = 2;
545 Ndiv = target / source;
546 } else
547 pll_div.pre_scale = 1;
548
549 if ((Ndiv < 6) || (Ndiv > 12))
550 printk(KERN_WARNING
551 "WM8940 N value %d outwith recommended range!d\n",
552 Ndiv);
553
554 pll_div.n = Ndiv;
555 Nmod = target % source;
556 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
557
558 do_div(Kpart, source);
559
560 K = Kpart & 0xFFFFFFFF;
561
562 /* Check if we need to round */
563 if ((K % 10) >= 5)
564 K += 5;
565
566 /* Move down to proper range now rounding is done */
567 K /= 10;
568
569 pll_div.k = K;
570 }
571
572 /* Untested at the moment */
wm8940_set_dai_pll(struct snd_soc_dai * codec_dai,int pll_id,int source,unsigned int freq_in,unsigned int freq_out)573 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
574 int source, unsigned int freq_in, unsigned int freq_out)
575 {
576 struct snd_soc_component *component = codec_dai->component;
577 u16 reg;
578
579 /* Turn off PLL */
580 reg = snd_soc_component_read(component, WM8940_POWER1);
581 snd_soc_component_write(component, WM8940_POWER1, reg & 0x1df);
582
583 if (freq_in == 0 || freq_out == 0) {
584 /* Clock CODEC directly from MCLK */
585 reg = snd_soc_component_read(component, WM8940_CLOCK);
586 snd_soc_component_write(component, WM8940_CLOCK, reg & 0x0ff);
587 /* Pll power down */
588 snd_soc_component_write(component, WM8940_PLLN, (1 << 7));
589 return 0;
590 }
591
592 /* Pll is followed by a frequency divide by 4 */
593 pll_factors(freq_out*4, freq_in);
594 if (pll_div.k)
595 snd_soc_component_write(component, WM8940_PLLN,
596 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
597 else /* No factional component */
598 snd_soc_component_write(component, WM8940_PLLN,
599 (pll_div.pre_scale << 4) | pll_div.n);
600 snd_soc_component_write(component, WM8940_PLLK1, pll_div.k >> 18);
601 snd_soc_component_write(component, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
602 snd_soc_component_write(component, WM8940_PLLK3, pll_div.k & 0x1ff);
603 /* Enable the PLL */
604 reg = snd_soc_component_read(component, WM8940_POWER1);
605 snd_soc_component_write(component, WM8940_POWER1, reg | 0x020);
606
607 /* Run CODEC from PLL instead of MCLK */
608 reg = snd_soc_component_read(component, WM8940_CLOCK);
609 snd_soc_component_write(component, WM8940_CLOCK, reg | 0x100);
610
611 return 0;
612 }
613
wm8940_set_dai_sysclk(struct snd_soc_dai * codec_dai,int clk_id,unsigned int freq,int dir)614 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
615 int clk_id, unsigned int freq, int dir)
616 {
617 struct snd_soc_component *component = codec_dai->component;
618 struct wm8940_priv *wm8940 = snd_soc_component_get_drvdata(component);
619
620 switch (freq) {
621 case 11289600:
622 case 12000000:
623 case 12288000:
624 case 16934400:
625 case 18432000:
626 wm8940->sysclk = freq;
627 return 0;
628 }
629 return -EINVAL;
630 }
631
wm8940_set_dai_clkdiv(struct snd_soc_dai * codec_dai,int div_id,int div)632 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
633 int div_id, int div)
634 {
635 struct snd_soc_component *component = codec_dai->component;
636 u16 reg;
637 int ret = 0;
638
639 switch (div_id) {
640 case WM8940_BCLKDIV:
641 reg = snd_soc_component_read(component, WM8940_CLOCK) & 0xFFE3;
642 ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 2));
643 break;
644 case WM8940_MCLKDIV:
645 reg = snd_soc_component_read(component, WM8940_CLOCK) & 0xFF1F;
646 ret = snd_soc_component_write(component, WM8940_CLOCK, reg | (div << 5));
647 break;
648 case WM8940_OPCLKDIV:
649 reg = snd_soc_component_read(component, WM8940_GPIO) & 0xFFCF;
650 ret = snd_soc_component_write(component, WM8940_GPIO, reg | (div << 4));
651 break;
652 }
653 return ret;
654 }
655
656 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
657
658 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
659 SNDRV_PCM_FMTBIT_S16_LE | \
660 SNDRV_PCM_FMTBIT_S20_3LE | \
661 SNDRV_PCM_FMTBIT_S24_LE | \
662 SNDRV_PCM_FMTBIT_S32_LE)
663
664 static const struct snd_soc_dai_ops wm8940_dai_ops = {
665 .hw_params = wm8940_i2s_hw_params,
666 .set_sysclk = wm8940_set_dai_sysclk,
667 .mute_stream = wm8940_mute,
668 .set_fmt = wm8940_set_dai_fmt,
669 .set_clkdiv = wm8940_set_dai_clkdiv,
670 .set_pll = wm8940_set_dai_pll,
671 .no_capture_mute = 1,
672 };
673
674 static struct snd_soc_dai_driver wm8940_dai = {
675 .name = "wm8940-hifi",
676 .playback = {
677 .stream_name = "Playback",
678 .channels_min = 1,
679 .channels_max = 2,
680 .rates = WM8940_RATES,
681 .formats = WM8940_FORMATS,
682 },
683 .capture = {
684 .stream_name = "Capture",
685 .channels_min = 1,
686 .channels_max = 2,
687 .rates = WM8940_RATES,
688 .formats = WM8940_FORMATS,
689 },
690 .ops = &wm8940_dai_ops,
691 .symmetric_rates = 1,
692 };
693
wm8940_probe(struct snd_soc_component * component)694 static int wm8940_probe(struct snd_soc_component *component)
695 {
696 struct wm8940_setup_data *pdata = component->dev->platform_data;
697 int ret;
698 u16 reg;
699
700 ret = wm8940_reset(component);
701 if (ret < 0) {
702 dev_err(component->dev, "Failed to issue reset\n");
703 return ret;
704 }
705
706 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
707
708 ret = snd_soc_component_write(component, WM8940_POWER1, 0x180);
709 if (ret < 0)
710 return ret;
711
712 if (!pdata)
713 dev_warn(component->dev, "No platform data supplied\n");
714 else {
715 reg = snd_soc_component_read(component, WM8940_OUTPUTCTL);
716 ret = snd_soc_component_write(component, WM8940_OUTPUTCTL, reg | pdata->vroi);
717 if (ret < 0)
718 return ret;
719 }
720
721 return ret;
722 }
723
724 static const struct snd_soc_component_driver soc_component_dev_wm8940 = {
725 .probe = wm8940_probe,
726 .set_bias_level = wm8940_set_bias_level,
727 .controls = wm8940_snd_controls,
728 .num_controls = ARRAY_SIZE(wm8940_snd_controls),
729 .dapm_widgets = wm8940_dapm_widgets,
730 .num_dapm_widgets = ARRAY_SIZE(wm8940_dapm_widgets),
731 .dapm_routes = wm8940_dapm_routes,
732 .num_dapm_routes = ARRAY_SIZE(wm8940_dapm_routes),
733 .suspend_bias_off = 1,
734 .idle_bias_on = 1,
735 .use_pmdown_time = 1,
736 .endianness = 1,
737 .non_legacy_dai_naming = 1,
738 };
739
740 static const struct regmap_config wm8940_regmap = {
741 .reg_bits = 8,
742 .val_bits = 16,
743
744 .max_register = WM8940_MONOMIX,
745 .reg_defaults = wm8940_reg_defaults,
746 .num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
747 .cache_type = REGCACHE_RBTREE,
748
749 .readable_reg = wm8940_readable_register,
750 .volatile_reg = wm8940_volatile_register,
751 };
752
wm8940_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)753 static int wm8940_i2c_probe(struct i2c_client *i2c,
754 const struct i2c_device_id *id)
755 {
756 struct wm8940_priv *wm8940;
757 int ret;
758
759 wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv),
760 GFP_KERNEL);
761 if (wm8940 == NULL)
762 return -ENOMEM;
763
764 wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);
765 if (IS_ERR(wm8940->regmap))
766 return PTR_ERR(wm8940->regmap);
767
768 i2c_set_clientdata(i2c, wm8940);
769
770 ret = devm_snd_soc_register_component(&i2c->dev,
771 &soc_component_dev_wm8940, &wm8940_dai, 1);
772
773 return ret;
774 }
775
776 static const struct i2c_device_id wm8940_i2c_id[] = {
777 { "wm8940", 0 },
778 { }
779 };
780 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
781
782 static struct i2c_driver wm8940_i2c_driver = {
783 .driver = {
784 .name = "wm8940",
785 },
786 .probe = wm8940_i2c_probe,
787 .id_table = wm8940_i2c_id,
788 };
789
790 module_i2c_driver(wm8940_i2c_driver);
791
792 MODULE_DESCRIPTION("ASoC WM8940 driver");
793 MODULE_AUTHOR("Jonathan Cameron");
794 MODULE_LICENSE("GPL");
795