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[linux-2.6.git] / sound / soc / codecs / wm8955.c
blob5e0214d6293ea57672ebc54c427470e50768e4ca
1 /*
2 * wm8955.c -- WM8955 ALSA SoC Audio driver
3 *
4 * Copyright 2009 Wolfson Microelectronics plc
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/pm.h>
18 #include <linux/i2c.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/consumer.h>
21 #include <linux/slab.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
27 #include <sound/tlv.h>
28 #include <sound/wm8955.h>
29
30 #include "wm8955.h"
31
32 #define WM8955_NUM_SUPPLIES 4
33 static const char *wm8955_supply_names[WM8955_NUM_SUPPLIES] = {
34 "DCVDD",
35 "DBVDD",
36 "HPVDD",
37 "AVDD",
38 };
39
40 /* codec private data */
41 struct wm8955_priv {
42 enum snd_soc_control_type control_type;
43
44 unsigned int mclk_rate;
45
46 int deemph;
47 int fs;
48
49 struct regulator_bulk_data supplies[WM8955_NUM_SUPPLIES];
50 };
51
52 static const u16 wm8955_reg[WM8955_MAX_REGISTER + 1] = {
53 0x0000, /* R0 */
54 0x0000, /* R1 */
55 0x0079, /* R2 - LOUT1 volume */
56 0x0079, /* R3 - ROUT1 volume */
57 0x0000, /* R4 */
58 0x0008, /* R5 - DAC Control */
59 0x0000, /* R6 */
60 0x000A, /* R7 - Audio Interface */
61 0x0000, /* R8 - Sample Rate */
62 0x0000, /* R9 */
63 0x00FF, /* R10 - Left DAC volume */
64 0x00FF, /* R11 - Right DAC volume */
65 0x000F, /* R12 - Bass control */
66 0x000F, /* R13 - Treble control */
67 0x0000, /* R14 */
68 0x0000, /* R15 - Reset */
69 0x0000, /* R16 */
70 0x0000, /* R17 */
71 0x0000, /* R18 */
72 0x0000, /* R19 */
73 0x0000, /* R20 */
74 0x0000, /* R21 */
75 0x0000, /* R22 */
76 0x00C1, /* R23 - Additional control (1) */
77 0x0000, /* R24 - Additional control (2) */
78 0x0000, /* R25 - Power Management (1) */
79 0x0000, /* R26 - Power Management (2) */
80 0x0000, /* R27 - Additional Control (3) */
81 0x0000, /* R28 */
82 0x0000, /* R29 */
83 0x0000, /* R30 */
84 0x0000, /* R31 */
85 0x0000, /* R32 */
86 0x0000, /* R33 */
87 0x0050, /* R34 - Left out Mix (1) */
88 0x0050, /* R35 - Left out Mix (2) */
89 0x0050, /* R36 - Right out Mix (1) */
90 0x0050, /* R37 - Right Out Mix (2) */
91 0x0050, /* R38 - Mono out Mix (1) */
92 0x0050, /* R39 - Mono out Mix (2) */
93 0x0079, /* R40 - LOUT2 volume */
94 0x0079, /* R41 - ROUT2 volume */
95 0x0079, /* R42 - MONOOUT volume */
96 0x0000, /* R43 - Clocking / PLL */
97 0x0103, /* R44 - PLL Control 1 */
98 0x0024, /* R45 - PLL Control 2 */
99 0x01BA, /* R46 - PLL Control 3 */
100 0x0000, /* R47 */
101 0x0000, /* R48 */
102 0x0000, /* R49 */
103 0x0000, /* R50 */
104 0x0000, /* R51 */
105 0x0000, /* R52 */
106 0x0000, /* R53 */
107 0x0000, /* R54 */
108 0x0000, /* R55 */
109 0x0000, /* R56 */
110 0x0000, /* R57 */
111 0x0000, /* R58 */
112 0x0000, /* R59 - PLL Control 4 */
113 };
114
115 static int wm8955_reset(struct snd_soc_codec *codec)
116 {
117 return snd_soc_write(codec, WM8955_RESET, 0);
118 }
119
120 struct pll_factors {
121 int n;
122 int k;
123 int outdiv;
124 };
125
126 /* The size in bits of the FLL divide multiplied by 10
127 * to allow rounding later */
128 #define FIXED_FLL_SIZE ((1 << 22) * 10)
129
130 static int wm8995_pll_factors(struct device *dev,
131 int Fref, int Fout, struct pll_factors *pll)
132 {
133 u64 Kpart;
134 unsigned int K, Ndiv, Nmod, target;
135
136 dev_dbg(dev, "Fref=%u Fout=%u\n", Fref, Fout);
137
138 /* The oscilator should run at should be 90-100MHz, and
139 * there's a divide by 4 plus an optional divide by 2 in the
140 * output path to generate the system clock. The clock table
141 * is sortd so we should always generate a suitable target. */
142 target = Fout * 4;
143 if (target < 90000000) {
144 pll->outdiv = 1;
145 target *= 2;
146 } else {
147 pll->outdiv = 0;
148 }
149
150 WARN_ON(target < 90000000 || target > 100000000);
151
152 dev_dbg(dev, "Fvco=%dHz\n", target);
153
154 /* Now, calculate N.K */
155 Ndiv = target / Fref;
156
157 pll->n = Ndiv;
158 Nmod = target % Fref;
159 dev_dbg(dev, "Nmod=%d\n", Nmod);
160
161 /* Calculate fractional part - scale up so we can round. */
162 Kpart = FIXED_FLL_SIZE * (long long)Nmod;
163
164 do_div(Kpart, Fref);
165
166 K = Kpart & 0xFFFFFFFF;
167
168 if ((K % 10) >= 5)
169 K += 5;
170
171 /* Move down to proper range now rounding is done */
172 pll->k = K / 10;
173
174 dev_dbg(dev, "N=%x K=%x OUTDIV=%x\n", pll->n, pll->k, pll->outdiv);
175
176 return 0;
177 }
178
179 /* Lookup table specifiying SRATE (table 25 in datasheet); some of the
180 * output frequencies have been rounded to the standard frequencies
181 * they are intended to match where the error is slight. */
182 static struct {
183 int mclk;
184 int fs;
185 int usb;
186 int sr;
187 } clock_cfgs[] = {
188 { 18432000, 8000, 0, 3, },
189 { 18432000, 12000, 0, 9, },
190 { 18432000, 16000, 0, 11, },
191 { 18432000, 24000, 0, 29, },
192 { 18432000, 32000, 0, 13, },
193 { 18432000, 48000, 0, 1, },
194 { 18432000, 96000, 0, 15, },
195
196 { 16934400, 8018, 0, 19, },
197 { 16934400, 11025, 0, 25, },
198 { 16934400, 22050, 0, 27, },
199 { 16934400, 44100, 0, 17, },
200 { 16934400, 88200, 0, 31, },
201
202 { 12000000, 8000, 1, 2, },
203 { 12000000, 11025, 1, 25, },
204 { 12000000, 12000, 1, 8, },
205 { 12000000, 16000, 1, 10, },
206 { 12000000, 22050, 1, 27, },
207 { 12000000, 24000, 1, 28, },
208 { 12000000, 32000, 1, 12, },
209 { 12000000, 44100, 1, 17, },
210 { 12000000, 48000, 1, 0, },
211 { 12000000, 88200, 1, 31, },
212 { 12000000, 96000, 1, 14, },
213
214 { 12288000, 8000, 0, 2, },
215 { 12288000, 12000, 0, 8, },
216 { 12288000, 16000, 0, 10, },
217 { 12288000, 24000, 0, 28, },
218 { 12288000, 32000, 0, 12, },
219 { 12288000, 48000, 0, 0, },
220 { 12288000, 96000, 0, 14, },
221
222 { 12289600, 8018, 0, 18, },
223 { 12289600, 11025, 0, 24, },
224 { 12289600, 22050, 0, 26, },
225 { 11289600, 44100, 0, 16, },
226 { 11289600, 88200, 0, 31, },
227 };
228
229 static int wm8955_configure_clocking(struct snd_soc_codec *codec)
230 {
231 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
232 int i, ret, val;
233 int clocking = 0;
234 int srate = 0;
235 int sr = -1;
236 struct pll_factors pll;
237
238 /* If we're not running a sample rate currently just pick one */
239 if (wm8955->fs == 0)
240 wm8955->fs = 8000;
241
242 /* Can we generate an exact output? */
243 for (i = 0; i < ARRAY_SIZE(clock_cfgs); i++) {
244 if (wm8955->fs != clock_cfgs[i].fs)
245 continue;
246 sr = i;
247
248 if (wm8955->mclk_rate == clock_cfgs[i].mclk)
249 break;
250 }
251
252 /* We should never get here with an unsupported sample rate */
253 if (sr == -1) {
254 dev_err(codec->dev, "Sample rate %dHz unsupported\n",
255 wm8955->fs);
256 WARN_ON(sr == -1);
257 return -EINVAL;
258 }
259
260 if (i == ARRAY_SIZE(clock_cfgs)) {
261 /* If we can't generate the right clock from MCLK then
262 * we should configure the PLL to supply us with an
263 * appropriate clock.
264 */
265 clocking |= WM8955_MCLKSEL;
266
267 /* Use the last divider configuration we saw for the
268 * sample rate. */
269 ret = wm8995_pll_factors(codec->dev, wm8955->mclk_rate,
270 clock_cfgs[sr].mclk, &pll);
271 if (ret != 0) {
272 dev_err(codec->dev,
273 "Unable to generate %dHz from %dHz MCLK\n",
274 wm8955->fs, wm8955->mclk_rate);
275 return -EINVAL;
276 }
277
278 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_1,
279 WM8955_N_MASK | WM8955_K_21_18_MASK,
280 (pll.n << WM8955_N_SHIFT) |
281 pll.k >> 18);
282 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
283 WM8955_K_17_9_MASK,
284 (pll.k >> 9) & WM8955_K_17_9_MASK);
285 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
286 WM8955_K_8_0_MASK,
287 pll.k & WM8955_K_8_0_MASK);
288 if (pll.k)
289 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
290 WM8955_KEN, WM8955_KEN);
291 else
292 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
293 WM8955_KEN, 0);
294
295 if (pll.outdiv)
296 val = WM8955_PLL_RB | WM8955_PLLOUTDIV2;
297 else
298 val = WM8955_PLL_RB;
299
300 /* Now start the PLL running */
301 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
302 WM8955_PLL_RB | WM8955_PLLOUTDIV2, val);
303 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
304 WM8955_PLLEN, WM8955_PLLEN);
305 }
306
307 srate = clock_cfgs[sr].usb | (clock_cfgs[sr].sr << WM8955_SR_SHIFT);
308
309 snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
310 WM8955_USB | WM8955_SR_MASK, srate);
311 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
312 WM8955_MCLKSEL, clocking);
313
314 return 0;
315 }
316
317 static int wm8955_sysclk(struct snd_soc_dapm_widget *w,
318 struct snd_kcontrol *kcontrol, int event)
319 {
320 struct snd_soc_codec *codec = w->codec;
321 int ret = 0;
322
323 /* Always disable the clocks - if we're doing reconfiguration this
324 * avoids misclocking.
325 */
326 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
327 WM8955_DIGENB, 0);
328 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
329 WM8955_PLL_RB | WM8955_PLLEN, 0);
330
331 switch (event) {
332 case SND_SOC_DAPM_POST_PMD:
333 break;
334 case SND_SOC_DAPM_PRE_PMU:
335 ret = wm8955_configure_clocking(codec);
336 break;
337 default:
338 ret = -EINVAL;
339 break;
340 }
341
342 return ret;
343 }
344
345 static int deemph_settings[] = { 0, 32000, 44100, 48000 };
346
347 static int wm8955_set_deemph(struct snd_soc_codec *codec)
348 {
349 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
350 int val, i, best;
351
352 /* If we're using deemphasis select the nearest available sample
353 * rate.
354 */
355 if (wm8955->deemph) {
356 best = 1;
357 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
358 if (abs(deemph_settings[i] - wm8955->fs) <
359 abs(deemph_settings[best] - wm8955->fs))
360 best = i;
361 }
362
363 val = best << WM8955_DEEMPH_SHIFT;
364 } else {
365 val = 0;
366 }
367
368 dev_dbg(codec->dev, "Set deemphasis %d\n", val);
369
370 return snd_soc_update_bits(codec, WM8955_DAC_CONTROL,
371 WM8955_DEEMPH_MASK, val);
372 }
373
374 static int wm8955_get_deemph(struct snd_kcontrol *kcontrol,
375 struct snd_ctl_elem_value *ucontrol)
376 {
377 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
378 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
379
380 ucontrol->value.enumerated.item[0] = wm8955->deemph;
381 return 0;
382 }
383
384 static int wm8955_put_deemph(struct snd_kcontrol *kcontrol,
385 struct snd_ctl_elem_value *ucontrol)
386 {
387 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
388 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
389 int deemph = ucontrol->value.enumerated.item[0];
390
391 if (deemph > 1)
392 return -EINVAL;
393
394 wm8955->deemph = deemph;
395
396 return wm8955_set_deemph(codec);
397 }
398
399 static const char *bass_mode_text[] = {
400 "Linear", "Adaptive",
401 };
402
403 static const struct soc_enum bass_mode =
404 SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 7, 2, bass_mode_text);
405
406 static const char *bass_cutoff_text[] = {
407 "Low", "High"
408 };
409
410 static const struct soc_enum bass_cutoff =
411 SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 6, 2, bass_cutoff_text);
412
413 static const char *treble_cutoff_text[] = {
414 "High", "Low"
415 };
416
417 static const struct soc_enum treble_cutoff =
418 SOC_ENUM_SINGLE(WM8955_TREBLE_CONTROL, 6, 2, treble_cutoff_text);
419
420 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
421 static const DECLARE_TLV_DB_SCALE(atten_tlv, -600, 600, 0);
422 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -1500, 300, 0);
423 static const DECLARE_TLV_DB_SCALE(mono_tlv, -2100, 300, 0);
424 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
425 static const DECLARE_TLV_DB_SCALE(treble_tlv, -1200, 150, 1);
426
427 static const struct snd_kcontrol_new wm8955_snd_controls[] = {
428 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8955_LEFT_DAC_VOLUME,
429 WM8955_RIGHT_DAC_VOLUME, 0, 255, 0, digital_tlv),
430 SOC_SINGLE_TLV("Playback Attenuation Volume", WM8955_DAC_CONTROL, 7, 1, 1,
431 atten_tlv),
432 SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
433 wm8955_get_deemph, wm8955_put_deemph),
434
435 SOC_ENUM("Bass Mode", bass_mode),
436 SOC_ENUM("Bass Cutoff", bass_cutoff),
437 SOC_SINGLE("Bass Volume", WM8955_BASS_CONTROL, 0, 15, 1),
438
439 SOC_ENUM("Treble Cutoff", treble_cutoff),
440 SOC_SINGLE_TLV("Treble Volume", WM8955_TREBLE_CONTROL, 0, 14, 1, treble_tlv),
441
442 SOC_SINGLE_TLV("Left Bypass Volume", WM8955_LEFT_OUT_MIX_1, 4, 7, 1,
443 bypass_tlv),
444 SOC_SINGLE_TLV("Left Mono Volume", WM8955_LEFT_OUT_MIX_2, 4, 7, 1,
445 bypass_tlv),
446
447 SOC_SINGLE_TLV("Right Mono Volume", WM8955_RIGHT_OUT_MIX_1, 4, 7, 1,
448 bypass_tlv),
449 SOC_SINGLE_TLV("Right Bypass Volume", WM8955_RIGHT_OUT_MIX_2, 4, 7, 1,
450 bypass_tlv),
451
452 /* Not a stereo pair so they line up with the DAPM switches */
453 SOC_SINGLE_TLV("Mono Left Bypass Volume", WM8955_MONO_OUT_MIX_1, 4, 7, 1,
454 mono_tlv),
455 SOC_SINGLE_TLV("Mono Right Bypass Volume", WM8955_MONO_OUT_MIX_2, 4, 7, 1,
456 mono_tlv),
457
458 SOC_DOUBLE_R_TLV("Headphone Volume", WM8955_LOUT1_VOLUME,
459 WM8955_ROUT1_VOLUME, 0, 127, 0, out_tlv),
460 SOC_DOUBLE_R("Headphone ZC Switch", WM8955_LOUT1_VOLUME,
461 WM8955_ROUT1_VOLUME, 7, 1, 0),
462
463 SOC_DOUBLE_R_TLV("Speaker Volume", WM8955_LOUT2_VOLUME,
464 WM8955_ROUT2_VOLUME, 0, 127, 0, out_tlv),
465 SOC_DOUBLE_R("Speaker ZC Switch", WM8955_LOUT2_VOLUME,
466 WM8955_ROUT2_VOLUME, 7, 1, 0),
467
468 SOC_SINGLE_TLV("Mono Volume", WM8955_MONOOUT_VOLUME, 0, 127, 0, out_tlv),
469 SOC_SINGLE("Mono ZC Switch", WM8955_MONOOUT_VOLUME, 7, 1, 0),
470 };
471
472 static const struct snd_kcontrol_new lmixer[] = {
473 SOC_DAPM_SINGLE("Playback Switch", WM8955_LEFT_OUT_MIX_1, 8, 1, 0),
474 SOC_DAPM_SINGLE("Bypass Switch", WM8955_LEFT_OUT_MIX_1, 7, 1, 0),
475 SOC_DAPM_SINGLE("Right Playback Switch", WM8955_LEFT_OUT_MIX_2, 8, 1, 0),
476 SOC_DAPM_SINGLE("Mono Switch", WM8955_LEFT_OUT_MIX_2, 7, 1, 0),
477 };
478
479 static const struct snd_kcontrol_new rmixer[] = {
480 SOC_DAPM_SINGLE("Left Playback Switch", WM8955_RIGHT_OUT_MIX_1, 8, 1, 0),
481 SOC_DAPM_SINGLE("Mono Switch", WM8955_RIGHT_OUT_MIX_1, 7, 1, 0),
482 SOC_DAPM_SINGLE("Playback Switch", WM8955_RIGHT_OUT_MIX_2, 8, 1, 0),
483 SOC_DAPM_SINGLE("Bypass Switch", WM8955_RIGHT_OUT_MIX_2, 7, 1, 0),
484 };
485
486 static const struct snd_kcontrol_new mmixer[] = {
487 SOC_DAPM_SINGLE("Left Playback Switch", WM8955_MONO_OUT_MIX_1, 8, 1, 0),
488 SOC_DAPM_SINGLE("Left Bypass Switch", WM8955_MONO_OUT_MIX_1, 7, 1, 0),
489 SOC_DAPM_SINGLE("Right Playback Switch", WM8955_MONO_OUT_MIX_2, 8, 1, 0),
490 SOC_DAPM_SINGLE("Right Bypass Switch", WM8955_MONO_OUT_MIX_2, 7, 1, 0),
491 };
492
493 static const struct snd_soc_dapm_widget wm8955_dapm_widgets[] = {
494 SND_SOC_DAPM_INPUT("MONOIN-"),
495 SND_SOC_DAPM_INPUT("MONOIN+"),
496 SND_SOC_DAPM_INPUT("LINEINR"),
497 SND_SOC_DAPM_INPUT("LINEINL"),
498
499 SND_SOC_DAPM_PGA("Mono Input", SND_SOC_NOPM, 0, 0, NULL, 0),
500
501 SND_SOC_DAPM_SUPPLY("SYSCLK", WM8955_POWER_MANAGEMENT_1, 0, 1, wm8955_sysclk,
502 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
503 SND_SOC_DAPM_SUPPLY("TSDEN", WM8955_ADDITIONAL_CONTROL_1, 8, 0, NULL, 0),
504
505 SND_SOC_DAPM_DAC("DACL", "Playback", WM8955_POWER_MANAGEMENT_2, 8, 0),
506 SND_SOC_DAPM_DAC("DACR", "Playback", WM8955_POWER_MANAGEMENT_2, 7, 0),
507
508 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8955_POWER_MANAGEMENT_2, 6, 0, NULL, 0),
509 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8955_POWER_MANAGEMENT_2, 5, 0, NULL, 0),
510 SND_SOC_DAPM_PGA("LOUT2 PGA", WM8955_POWER_MANAGEMENT_2, 4, 0, NULL, 0),
511 SND_SOC_DAPM_PGA("ROUT2 PGA", WM8955_POWER_MANAGEMENT_2, 3, 0, NULL, 0),
512 SND_SOC_DAPM_PGA("MOUT PGA", WM8955_POWER_MANAGEMENT_2, 2, 0, NULL, 0),
513 SND_SOC_DAPM_PGA("OUT3 PGA", WM8955_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
514
515 /* The names are chosen to make the control names nice */
516 SND_SOC_DAPM_MIXER("Left", SND_SOC_NOPM, 0, 0,
517 lmixer, ARRAY_SIZE(lmixer)),
518 SND_SOC_DAPM_MIXER("Right", SND_SOC_NOPM, 0, 0,
519 rmixer, ARRAY_SIZE(rmixer)),
520 SND_SOC_DAPM_MIXER("Mono", SND_SOC_NOPM, 0, 0,
521 mmixer, ARRAY_SIZE(mmixer)),
522
523 SND_SOC_DAPM_OUTPUT("LOUT1"),
524 SND_SOC_DAPM_OUTPUT("ROUT1"),
525 SND_SOC_DAPM_OUTPUT("LOUT2"),
526 SND_SOC_DAPM_OUTPUT("ROUT2"),
527 SND_SOC_DAPM_OUTPUT("MONOOUT"),
528 SND_SOC_DAPM_OUTPUT("OUT3"),
529 };
530
531 static const struct snd_soc_dapm_route wm8955_intercon[] = {
532 { "DACL", NULL, "SYSCLK" },
533 { "DACR", NULL, "SYSCLK" },
534
535 { "Mono Input", NULL, "MONOIN-" },
536 { "Mono Input", NULL, "MONOIN+" },
537
538 { "Left", "Playback Switch", "DACL" },
539 { "Left", "Right Playback Switch", "DACR" },
540 { "Left", "Bypass Switch", "LINEINL" },
541 { "Left", "Mono Switch", "Mono Input" },
542
543 { "Right", "Playback Switch", "DACR" },
544 { "Right", "Left Playback Switch", "DACL" },
545 { "Right", "Bypass Switch", "LINEINR" },
546 { "Right", "Mono Switch", "Mono Input" },
547
548 { "Mono", "Left Playback Switch", "DACL" },
549 { "Mono", "Right Playback Switch", "DACR" },
550 { "Mono", "Left Bypass Switch", "LINEINL" },
551 { "Mono", "Right Bypass Switch", "LINEINR" },
552
553 { "LOUT1 PGA", NULL, "Left" },
554 { "LOUT1", NULL, "TSDEN" },
555 { "LOUT1", NULL, "LOUT1 PGA" },
556
557 { "ROUT1 PGA", NULL, "Right" },
558 { "ROUT1", NULL, "TSDEN" },
559 { "ROUT1", NULL, "ROUT1 PGA" },
560
561 { "LOUT2 PGA", NULL, "Left" },
562 { "LOUT2", NULL, "TSDEN" },
563 { "LOUT2", NULL, "LOUT2 PGA" },
564
565 { "ROUT2 PGA", NULL, "Right" },
566 { "ROUT2", NULL, "TSDEN" },
567 { "ROUT2", NULL, "ROUT2 PGA" },
568
569 { "MOUT PGA", NULL, "Mono" },
570 { "MONOOUT", NULL, "MOUT PGA" },
571
572 /* OUT3 not currently implemented */
573 { "OUT3", NULL, "OUT3 PGA" },
574 };
575
576 static int wm8955_add_widgets(struct snd_soc_codec *codec)
577 {
578 struct snd_soc_dapm_context *dapm = &codec->dapm;
579
580 snd_soc_add_controls(codec, wm8955_snd_controls,
581 ARRAY_SIZE(wm8955_snd_controls));
582
583 snd_soc_dapm_new_controls(dapm, wm8955_dapm_widgets,
584 ARRAY_SIZE(wm8955_dapm_widgets));
585 snd_soc_dapm_add_routes(dapm, wm8955_intercon,
586 ARRAY_SIZE(wm8955_intercon));
587
588 return 0;
589 }
590
591 static int wm8955_hw_params(struct snd_pcm_substream *substream,
592 struct snd_pcm_hw_params *params,
593 struct snd_soc_dai *dai)
594 {
595 struct snd_soc_codec *codec = dai->codec;
596 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
597 int ret;
598 int wl;
599
600 switch (params_format(params)) {
601 case SNDRV_PCM_FORMAT_S16_LE:
602 wl = 0;
603 break;
604 case SNDRV_PCM_FORMAT_S20_3LE:
605 wl = 0x4;
606 break;
607 case SNDRV_PCM_FORMAT_S24_LE:
608 wl = 0x8;
609 break;
610 case SNDRV_PCM_FORMAT_S32_LE:
611 wl = 0xc;
612 break;
613 default:
614 return -EINVAL;
615 }
616 snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
617 WM8955_WL_MASK, wl);
618
619 wm8955->fs = params_rate(params);
620 wm8955_set_deemph(codec);
621
622 /* If the chip is clocked then disable the clocks and force a
623 * reconfiguration, otherwise DAPM will power up the
624 * clocks for us later. */
625 ret = snd_soc_read(codec, WM8955_POWER_MANAGEMENT_1);
626 if (ret < 0)
627 return ret;
628 if (ret & WM8955_DIGENB) {
629 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
630 WM8955_DIGENB, 0);
631 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
632 WM8955_PLL_RB | WM8955_PLLEN, 0);
633
634 wm8955_configure_clocking(codec);
635 }
636
637 return 0;
638 }
639
640
641 static int wm8955_set_sysclk(struct snd_soc_dai *dai, int clk_id,
642 unsigned int freq, int dir)
643 {
644 struct snd_soc_codec *codec = dai->codec;
645 struct wm8955_priv *priv = snd_soc_codec_get_drvdata(codec);
646 int div;
647
648 switch (clk_id) {
649 case WM8955_CLK_MCLK:
650 if (freq > 15000000) {
651 priv->mclk_rate = freq /= 2;
652 div = WM8955_MCLKDIV2;
653 } else {
654 priv->mclk_rate = freq;
655 div = 0;
656 }
657
658 snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
659 WM8955_MCLKDIV2, div);
660 break;
661
662 default:
663 return -EINVAL;
664 }
665
666 dev_dbg(dai->dev, "Clock source is %d at %uHz\n", clk_id, freq);
667
668 return 0;
669 }
670
671 static int wm8955_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
672 {
673 struct snd_soc_codec *codec = dai->codec;
674 u16 aif = 0;
675
676 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
677 case SND_SOC_DAIFMT_CBS_CFS:
678 break;
679 case SND_SOC_DAIFMT_CBM_CFM:
680 aif |= WM8955_MS;
681 break;
682 default:
683 return -EINVAL;
684 }
685
686 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
687 case SND_SOC_DAIFMT_DSP_B:
688 aif |= WM8955_LRP;
689 case SND_SOC_DAIFMT_DSP_A:
690 aif |= 0x3;
691 break;
692 case SND_SOC_DAIFMT_I2S:
693 aif |= 0x2;
694 break;
695 case SND_SOC_DAIFMT_RIGHT_J:
696 break;
697 case SND_SOC_DAIFMT_LEFT_J:
698 aif |= 0x1;
699 break;
700 default:
701 return -EINVAL;
702 }
703
704 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
705 case SND_SOC_DAIFMT_DSP_A:
706 case SND_SOC_DAIFMT_DSP_B:
707 /* frame inversion not valid for DSP modes */
708 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
709 case SND_SOC_DAIFMT_NB_NF:
710 break;
711 case SND_SOC_DAIFMT_IB_NF:
712 aif |= WM8955_BCLKINV;
713 break;
714 default:
715 return -EINVAL;
716 }
717 break;
718
719 case SND_SOC_DAIFMT_I2S:
720 case SND_SOC_DAIFMT_RIGHT_J:
721 case SND_SOC_DAIFMT_LEFT_J:
722 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
723 case SND_SOC_DAIFMT_NB_NF:
724 break;
725 case SND_SOC_DAIFMT_IB_IF:
726 aif |= WM8955_BCLKINV | WM8955_LRP;
727 break;
728 case SND_SOC_DAIFMT_IB_NF:
729 aif |= WM8955_BCLKINV;
730 break;
731 case SND_SOC_DAIFMT_NB_IF:
732 aif |= WM8955_LRP;
733 break;
734 default:
735 return -EINVAL;
736 }
737 break;
738 default:
739 return -EINVAL;
740 }
741
742 snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
743 WM8955_MS | WM8955_FORMAT_MASK | WM8955_BCLKINV |
744 WM8955_LRP, aif);
745
746 return 0;
747 }
748
749
750 static int wm8955_digital_mute(struct snd_soc_dai *codec_dai, int mute)
751 {
752 struct snd_soc_codec *codec = codec_dai->codec;
753 int val;
754
755 if (mute)
756 val = WM8955_DACMU;
757 else
758 val = 0;
759
760 snd_soc_update_bits(codec, WM8955_DAC_CONTROL, WM8955_DACMU, val);
761
762 return 0;
763 }
764
765 static int wm8955_set_bias_level(struct snd_soc_codec *codec,
766 enum snd_soc_bias_level level)
767 {
768 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
769 u16 *reg_cache = codec->reg_cache;
770 int ret, i;
771
772 switch (level) {
773 case SND_SOC_BIAS_ON:
774 break;
775
776 case SND_SOC_BIAS_PREPARE:
777 /* VMID resistance 2*50k */
778 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
779 WM8955_VMIDSEL_MASK,
780 0x1 << WM8955_VMIDSEL_SHIFT);
781
782 /* Default bias current */
783 snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
784 WM8955_VSEL_MASK,
785 0x2 << WM8955_VSEL_SHIFT);
786 break;
787
788 case SND_SOC_BIAS_STANDBY:
789 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
790 ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies),
791 wm8955->supplies);
792 if (ret != 0) {
793 dev_err(codec->dev,
794 "Failed to enable supplies: %d\n",
795 ret);
796 return ret;
797 }
798
799 /* Sync back cached values if they're
800 * different from the hardware default.
801 */
802 for (i = 0; i < codec->driver->reg_cache_size; i++) {
803 if (i == WM8955_RESET)
804 continue;
805
806 if (reg_cache[i] == wm8955_reg[i])
807 continue;
808
809 snd_soc_write(codec, i, reg_cache[i]);
810 }
811
812 /* Enable VREF and VMID */
813 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
814 WM8955_VREF |
815 WM8955_VMIDSEL_MASK,
816 WM8955_VREF |
817 0x3 << WM8955_VREF_SHIFT);
818
819 /* Let VMID ramp */
820 msleep(500);
821
822 /* High resistance VROI to maintain outputs */
823 snd_soc_update_bits(codec,
824 WM8955_ADDITIONAL_CONTROL_3,
825 WM8955_VROI, WM8955_VROI);
826 }
827
828 /* Maintain VMID with 2*250k */
829 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
830 WM8955_VMIDSEL_MASK,
831 0x2 << WM8955_VMIDSEL_SHIFT);
832
833 /* Minimum bias current */
834 snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
835 WM8955_VSEL_MASK, 0);
836 break;
837
838 case SND_SOC_BIAS_OFF:
839 /* Low resistance VROI to help discharge */
840 snd_soc_update_bits(codec,
841 WM8955_ADDITIONAL_CONTROL_3,
842 WM8955_VROI, 0);
843
844 /* Turn off VMID and VREF */
845 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
846 WM8955_VREF |
847 WM8955_VMIDSEL_MASK, 0);
848
849 regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies),
850 wm8955->supplies);
851 break;
852 }
853 codec->dapm.bias_level = level;
854 return 0;
855 }
856
857 #define WM8955_RATES SNDRV_PCM_RATE_8000_96000
858
859 #define WM8955_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
860 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
861
862 static struct snd_soc_dai_ops wm8955_dai_ops = {
863 .set_sysclk = wm8955_set_sysclk,
864 .set_fmt = wm8955_set_fmt,
865 .hw_params = wm8955_hw_params,
866 .digital_mute = wm8955_digital_mute,
867 };
868
869 static struct snd_soc_dai_driver wm8955_dai = {
870 .name = "wm8955-hifi",
871 .playback = {
872 .stream_name = "Playback",
873 .channels_min = 2,
874 .channels_max = 2,
875 .rates = WM8955_RATES,
876 .formats = WM8955_FORMATS,
877 },
878 .ops = &wm8955_dai_ops,
879 };
880
881 #ifdef CONFIG_PM
882 static int wm8955_suspend(struct snd_soc_codec *codec, pm_message_t state)
883 {
884 wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF);
885
886 return 0;
887 }
888
889 static int wm8955_resume(struct snd_soc_codec *codec)
890 {
891 wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
892
893 return 0;
894 }
895 #else
896 #define wm8955_suspend NULL
897 #define wm8955_resume NULL
898 #endif
899
900 static int wm8955_probe(struct snd_soc_codec *codec)
901 {
902 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
903 struct wm8955_pdata *pdata = dev_get_platdata(codec->dev);
904 u16 *reg_cache = codec->reg_cache;
905 int ret, i;
906
907 ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8955->control_type);
908 if (ret != 0) {
909 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
910 return ret;
911 }
912
913 for (i = 0; i < ARRAY_SIZE(wm8955->supplies); i++)
914 wm8955->supplies[i].supply = wm8955_supply_names[i];
915
916 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8955->supplies),
917 wm8955->supplies);
918 if (ret != 0) {
919 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
920 return ret;
921 }
922
923 ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies),
924 wm8955->supplies);
925 if (ret != 0) {
926 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
927 goto err_get;
928 }
929
930 ret = wm8955_reset(codec);
931 if (ret < 0) {
932 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
933 goto err_enable;
934 }
935
936 /* Change some default settings - latch VU and enable ZC */
937 snd_soc_update_bits(codec, WM8955_LEFT_DAC_VOLUME,
938 WM8955_LDVU, WM8955_LDVU);
939 snd_soc_update_bits(codec, WM8955_RIGHT_DAC_VOLUME,
940 WM8955_RDVU, WM8955_RDVU);
941 snd_soc_update_bits(codec, WM8955_LOUT1_VOLUME,
942 WM8955_LO1VU | WM8955_LO1ZC,
943 WM8955_LO1VU | WM8955_LO1ZC);
944 snd_soc_update_bits(codec, WM8955_ROUT1_VOLUME,
945 WM8955_RO1VU | WM8955_RO1ZC,
946 WM8955_RO1VU | WM8955_RO1ZC);
947 snd_soc_update_bits(codec, WM8955_LOUT2_VOLUME,
948 WM8955_LO2VU | WM8955_LO2ZC,
949 WM8955_LO2VU | WM8955_LO2ZC);
950 snd_soc_update_bits(codec, WM8955_ROUT2_VOLUME,
951 WM8955_RO2VU | WM8955_RO2ZC,
952 WM8955_RO2VU | WM8955_RO2ZC);
953 snd_soc_update_bits(codec, WM8955_MONOOUT_VOLUME,
954 WM8955_MOZC, WM8955_MOZC);
955
956 /* Also enable adaptive bass boost by default */
957 snd_soc_update_bits(codec, WM8955_BASS_CONTROL, WM8955_BB, WM8955_BB);
958
959 /* Set platform data values */
960 if (pdata) {
961 if (pdata->out2_speaker)
962 reg_cache[WM8955_ADDITIONAL_CONTROL_2]
963 |= WM8955_ROUT2INV;
964
965 if (pdata->monoin_diff)
966 reg_cache[WM8955_MONO_OUT_MIX_1]
967 |= WM8955_DMEN;
968 }
969
970 wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
971
972 /* Bias level configuration will have done an extra enable */
973 regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
974
975 wm8955_add_widgets(codec);
976 return 0;
977
978 err_enable:
979 regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
980 err_get:
981 regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
982 return ret;
983 }
984
985 static int wm8955_remove(struct snd_soc_codec *codec)
986 {
987 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
988
989 wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF);
990 regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
991 return 0;
992 }
993
994 static struct snd_soc_codec_driver soc_codec_dev_wm8955 = {
995 .probe = wm8955_probe,
996 .remove = wm8955_remove,
997 .suspend = wm8955_suspend,
998 .resume = wm8955_resume,
999 .set_bias_level = wm8955_set_bias_level,
1000 .reg_cache_size = ARRAY_SIZE(wm8955_reg),
1001 .reg_word_size = sizeof(u16),
1002 .reg_cache_default = wm8955_reg,
1003 };
1004
1005 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1006 static __devinit int wm8955_i2c_probe(struct i2c_client *i2c,
1007 const struct i2c_device_id *id)
1008 {
1009 struct wm8955_priv *wm8955;
1010 int ret;
1011
1012 wm8955 = kzalloc(sizeof(struct wm8955_priv), GFP_KERNEL);
1013 if (wm8955 == NULL)
1014 return -ENOMEM;
1015
1016 i2c_set_clientdata(i2c, wm8955);
1017 wm8955->control_type = SND_SOC_I2C;
1018
1019 ret = snd_soc_register_codec(&i2c->dev,
1020 &soc_codec_dev_wm8955, &wm8955_dai, 1);
1021 if (ret < 0)
1022 kfree(wm8955);
1023 return ret;
1024 }
1025
1026 static __devexit int wm8955_i2c_remove(struct i2c_client *client)
1027 {
1028 snd_soc_unregister_codec(&client->dev);
1029 kfree(i2c_get_clientdata(client));
1030 return 0;
1031 }
1032
1033 static const struct i2c_device_id wm8955_i2c_id[] = {
1034 { "wm8955", 0 },
1035 { }
1036 };
1037 MODULE_DEVICE_TABLE(i2c, wm8955_i2c_id);
1038
1039 static struct i2c_driver wm8955_i2c_driver = {
1040 .driver = {
1041 .name = "wm8955-codec",
1042 .owner = THIS_MODULE,
1043 },
1044 .probe = wm8955_i2c_probe,
1045 .remove = __devexit_p(wm8955_i2c_remove),
1046 .id_table = wm8955_i2c_id,
1047 };
1048 #endif
1049
1050 static int __init wm8955_modinit(void)
1051 {
1052 int ret = 0;
1053 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1054 ret = i2c_add_driver(&wm8955_i2c_driver);
1055 if (ret != 0) {
1056 printk(KERN_ERR "Failed to register WM8955 I2C driver: %d\n",
1057 ret);
1058 }
1059 #endif
1060 return ret;
1061 }
1062 module_init(wm8955_modinit);
1063
1064 static void __exit wm8955_exit(void)
1065 {
1066 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1067 i2c_del_driver(&wm8955_i2c_driver);
1068 #endif
1069 }
1070 module_exit(wm8955_exit);
1071
1072 MODULE_DESCRIPTION("ASoC WM8955 driver");
1073 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1074 MODULE_LICENSE("GPL");
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