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Merge branch 'for-2.6.37' into for-2.6.38
[mv-sheeva.git] / sound / soc / codecs / wm8955.c
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         u16 reg_cache[WM8955_MAX_REGISTER + 1];
45
46         unsigned int mclk_rate;
47
48         int deemph;
49         int fs;
50
51         struct regulator_bulk_data supplies[WM8955_NUM_SUPPLIES];
52 };
53
54 static const u16 wm8955_reg[WM8955_MAX_REGISTER + 1] = {
55         0x0000,     /* R0 */
56         0x0000,     /* R1 */
57         0x0079,     /* R2  - LOUT1 volume */
58         0x0079,     /* R3  - ROUT1 volume */
59         0x0000,     /* R4 */
60         0x0008,     /* R5  - DAC Control */
61         0x0000,     /* R6 */
62         0x000A,     /* R7  - Audio Interface */
63         0x0000,     /* R8  - Sample Rate */
64         0x0000,     /* R9 */
65         0x00FF,     /* R10 - Left DAC volume */
66         0x00FF,     /* R11 - Right DAC volume */
67         0x000F,     /* R12 - Bass control */
68         0x000F,     /* R13 - Treble control */
69         0x0000,     /* R14 */
70         0x0000,     /* R15 - Reset */
71         0x0000,     /* R16 */
72         0x0000,     /* R17 */
73         0x0000,     /* R18 */
74         0x0000,     /* R19 */
75         0x0000,     /* R20 */
76         0x0000,     /* R21 */
77         0x0000,     /* R22 */
78         0x00C1,     /* R23 - Additional control (1) */
79         0x0000,     /* R24 - Additional control (2) */
80         0x0000,     /* R25 - Power Management (1) */
81         0x0000,     /* R26 - Power Management (2) */
82         0x0000,     /* R27 - Additional Control (3) */
83         0x0000,     /* R28 */
84         0x0000,     /* R29 */
85         0x0000,     /* R30 */
86         0x0000,     /* R31 */
87         0x0000,     /* R32 */
88         0x0000,     /* R33 */
89         0x0050,     /* R34 - Left out Mix (1) */
90         0x0050,     /* R35 - Left out Mix (2) */
91         0x0050,     /* R36 - Right out Mix (1) */
92         0x0050,     /* R37 - Right Out Mix (2) */
93         0x0050,     /* R38 - Mono out Mix (1) */
94         0x0050,     /* R39 - Mono out Mix (2) */
95         0x0079,     /* R40 - LOUT2 volume */
96         0x0079,     /* R41 - ROUT2 volume */
97         0x0079,     /* R42 - MONOOUT volume */
98         0x0000,     /* R43 - Clocking / PLL */
99         0x0103,     /* R44 - PLL Control 1 */
100         0x0024,     /* R45 - PLL Control 2 */
101         0x01BA,     /* R46 - PLL Control 3 */
102         0x0000,     /* R47 */
103         0x0000,     /* R48 */
104         0x0000,     /* R49 */
105         0x0000,     /* R50 */
106         0x0000,     /* R51 */
107         0x0000,     /* R52 */
108         0x0000,     /* R53 */
109         0x0000,     /* R54 */
110         0x0000,     /* R55 */
111         0x0000,     /* R56 */
112         0x0000,     /* R57 */
113         0x0000,     /* R58 */
114         0x0000,     /* R59 - PLL Control 4 */
115 };
116
117 static int wm8955_reset(struct snd_soc_codec *codec)
118 {
119         return snd_soc_write(codec, WM8955_RESET, 0);
120 }
121
122 struct pll_factors {
123         int n;
124         int k;
125         int outdiv;
126 };
127
128 /* The size in bits of the FLL divide multiplied by 10
129  * to allow rounding later */
130 #define FIXED_FLL_SIZE ((1 << 22) * 10)
131
132 static int wm8995_pll_factors(struct device *dev,
133                               int Fref, int Fout, struct pll_factors *pll)
134 {
135         u64 Kpart;
136         unsigned int K, Ndiv, Nmod, target;
137
138         dev_dbg(dev, "Fref=%u Fout=%u\n", Fref, Fout);
139
140         /* The oscilator should run at should be 90-100MHz, and
141          * there's a divide by 4 plus an optional divide by 2 in the
142          * output path to generate the system clock.  The clock table
143          * is sortd so we should always generate a suitable target. */
144         target = Fout * 4;
145         if (target < 90000000) {
146                 pll->outdiv = 1;
147                 target *= 2;
148         } else {
149                 pll->outdiv = 0;
150         }
151
152         WARN_ON(target < 90000000 || target > 100000000);
153
154         dev_dbg(dev, "Fvco=%dHz\n", target);
155
156         /* Now, calculate N.K */
157         Ndiv = target / Fref;
158
159         pll->n = Ndiv;
160         Nmod = target % Fref;
161         dev_dbg(dev, "Nmod=%d\n", Nmod);
162
163         /* Calculate fractional part - scale up so we can round. */
164         Kpart = FIXED_FLL_SIZE * (long long)Nmod;
165
166         do_div(Kpart, Fref);
167
168         K = Kpart & 0xFFFFFFFF;
169
170         if ((K % 10) >= 5)
171                 K += 5;
172
173         /* Move down to proper range now rounding is done */
174         pll->k = K / 10;
175
176         dev_dbg(dev, "N=%x K=%x OUTDIV=%x\n", pll->n, pll->k, pll->outdiv);
177
178         return 0;
179 }
180
181 /* Lookup table specifiying SRATE (table 25 in datasheet); some of the
182  * output frequencies have been rounded to the standard frequencies
183  * they are intended to match where the error is slight. */
184 static struct {
185         int mclk;
186         int fs;
187         int usb;
188         int sr;
189 } clock_cfgs[] = {
190         { 18432000,  8000, 0,  3, },
191         { 18432000, 12000, 0,  9, },
192         { 18432000, 16000, 0, 11, },
193         { 18432000, 24000, 0, 29, },
194         { 18432000, 32000, 0, 13, },
195         { 18432000, 48000, 0,  1, },
196         { 18432000, 96000, 0, 15, },
197
198         { 16934400,  8018, 0, 19, },
199         { 16934400, 11025, 0, 25, },
200         { 16934400, 22050, 0, 27, },
201         { 16934400, 44100, 0, 17, },
202         { 16934400, 88200, 0, 31, },
203
204         { 12000000,  8000, 1,  2, },
205         { 12000000, 11025, 1, 25, },
206         { 12000000, 12000, 1,  8, },
207         { 12000000, 16000, 1, 10, },
208         { 12000000, 22050, 1, 27, },
209         { 12000000, 24000, 1, 28, },
210         { 12000000, 32000, 1, 12, },
211         { 12000000, 44100, 1, 17, },
212         { 12000000, 48000, 1,  0, },
213         { 12000000, 88200, 1, 31, },
214         { 12000000, 96000, 1, 14, },
215
216         { 12288000,  8000, 0,  2, },
217         { 12288000, 12000, 0,  8, },
218         { 12288000, 16000, 0, 10, },
219         { 12288000, 24000, 0, 28, },
220         { 12288000, 32000, 0, 12, },
221         { 12288000, 48000, 0,  0, },
222         { 12288000, 96000, 0, 14, },
223
224         { 12289600,  8018, 0, 18, },
225         { 12289600, 11025, 0, 24, },
226         { 12289600, 22050, 0, 26, },
227         { 11289600, 44100, 0, 16, },
228         { 11289600, 88200, 0, 31, },
229 };
230
231 static int wm8955_configure_clocking(struct snd_soc_codec *codec)
232 {
233         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
234         int i, ret, val;
235         int clocking = 0;
236         int srate = 0;
237         int sr = -1;
238         struct pll_factors pll;
239
240         /* If we're not running a sample rate currently just pick one */
241         if (wm8955->fs == 0)
242                 wm8955->fs = 8000;
243
244         /* Can we generate an exact output? */
245         for (i = 0; i < ARRAY_SIZE(clock_cfgs); i++) {
246                 if (wm8955->fs != clock_cfgs[i].fs)
247                         continue;
248                 sr = i;
249
250                 if (wm8955->mclk_rate == clock_cfgs[i].mclk)
251                         break;
252         }
253
254         /* We should never get here with an unsupported sample rate */
255         if (sr == -1) {
256                 dev_err(codec->dev, "Sample rate %dHz unsupported\n",
257                         wm8955->fs);
258                 WARN_ON(sr == -1);
259                 return -EINVAL;
260         }
261
262         if (i == ARRAY_SIZE(clock_cfgs)) {
263                 /* If we can't generate the right clock from MCLK then
264                  * we should configure the PLL to supply us with an
265                  * appropriate clock.
266                  */
267                 clocking |= WM8955_MCLKSEL;
268
269                 /* Use the last divider configuration we saw for the
270                  * sample rate. */
271                 ret = wm8995_pll_factors(codec->dev, wm8955->mclk_rate,
272                                          clock_cfgs[sr].mclk, &pll);
273                 if (ret != 0) {
274                         dev_err(codec->dev,
275                                 "Unable to generate %dHz from %dHz MCLK\n",
276                                 wm8955->fs, wm8955->mclk_rate);
277                         return -EINVAL;
278                 }
279
280                 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_1,
281                                     WM8955_N_MASK | WM8955_K_21_18_MASK,
282                                     (pll.n << WM8955_N_SHIFT) |
283                                     pll.k >> 18);
284                 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
285                                     WM8955_K_17_9_MASK,
286                                     (pll.k >> 9) & WM8955_K_17_9_MASK);
287                 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
288                                     WM8955_K_8_0_MASK,
289                                     pll.k & WM8955_K_8_0_MASK);
290                 if (pll.k)
291                         snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
292                                             WM8955_KEN, WM8955_KEN);
293                 else
294                         snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
295                                             WM8955_KEN, 0);
296
297                 if (pll.outdiv)
298                         val = WM8955_PLL_RB | WM8955_PLLOUTDIV2;
299                 else
300                         val = WM8955_PLL_RB;
301
302                 /* Now start the PLL running */
303                 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
304                                     WM8955_PLL_RB | WM8955_PLLOUTDIV2, val);
305                 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
306                                     WM8955_PLLEN, WM8955_PLLEN);
307         }
308
309         srate = clock_cfgs[sr].usb | (clock_cfgs[sr].sr << WM8955_SR_SHIFT);
310
311         snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
312                             WM8955_USB | WM8955_SR_MASK, srate);
313         snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
314                             WM8955_MCLKSEL, clocking);
315
316         return 0;
317 }
318
319 static int wm8955_sysclk(struct snd_soc_dapm_widget *w,
320                          struct snd_kcontrol *kcontrol, int event)
321 {
322         struct snd_soc_codec *codec = w->codec;
323         int ret = 0;
324
325         /* Always disable the clocks - if we're doing reconfiguration this
326          * avoids misclocking.
327          */
328         snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
329                             WM8955_DIGENB, 0);
330         snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
331                             WM8955_PLL_RB | WM8955_PLLEN, 0);
332
333         switch (event) {
334         case SND_SOC_DAPM_POST_PMD:
335                 break;
336         case SND_SOC_DAPM_PRE_PMU:
337                 ret = wm8955_configure_clocking(codec);
338                 break;
339         default:
340                 ret = -EINVAL;
341                 break;
342         }
343
344         return ret;
345 }
346
347 static int deemph_settings[] = { 0, 32000, 44100, 48000 };
348
349 static int wm8955_set_deemph(struct snd_soc_codec *codec)
350 {
351         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
352         int val, i, best;
353
354         /* If we're using deemphasis select the nearest available sample
355          * rate.
356          */
357         if (wm8955->deemph) {
358                 best = 1;
359                 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
360                         if (abs(deemph_settings[i] - wm8955->fs) <
361                             abs(deemph_settings[best] - wm8955->fs))
362                                 best = i;
363                 }
364
365                 val = best << WM8955_DEEMPH_SHIFT;
366         } else {
367                 val = 0;
368         }
369
370         dev_dbg(codec->dev, "Set deemphasis %d\n", val);
371
372         return snd_soc_update_bits(codec, WM8955_DAC_CONTROL,
373                                    WM8955_DEEMPH_MASK, val);
374 }
375
376 static int wm8955_get_deemph(struct snd_kcontrol *kcontrol,
377                              struct snd_ctl_elem_value *ucontrol)
378 {
379         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
380         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
381
382         ucontrol->value.enumerated.item[0] = wm8955->deemph;
383         return 0;
384 }
385
386 static int wm8955_put_deemph(struct snd_kcontrol *kcontrol,
387                              struct snd_ctl_elem_value *ucontrol)
388 {
389         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
390         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
391         int deemph = ucontrol->value.enumerated.item[0];
392
393         if (deemph > 1)
394                 return -EINVAL;
395
396         wm8955->deemph = deemph;
397
398         return wm8955_set_deemph(codec);
399 }
400
401 static const char *bass_mode_text[] = {
402         "Linear", "Adaptive",
403 };
404
405 static const struct soc_enum bass_mode =
406         SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 7, 2, bass_mode_text);
407
408 static const char *bass_cutoff_text[] = {
409         "Low", "High"
410 };
411
412 static const struct soc_enum bass_cutoff =
413         SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 6, 2, bass_cutoff_text);
414
415 static const char *treble_cutoff_text[] = {
416         "High", "Low"
417 };
418
419 static const struct soc_enum treble_cutoff =
420         SOC_ENUM_SINGLE(WM8955_TREBLE_CONTROL, 6, 2, treble_cutoff_text);
421
422 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
423 static const DECLARE_TLV_DB_SCALE(atten_tlv, -600, 600, 0);
424 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -1500, 300, 0);
425 static const DECLARE_TLV_DB_SCALE(mono_tlv, -2100, 300, 0);
426 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
427 static const DECLARE_TLV_DB_SCALE(treble_tlv, -1200, 150, 1);
428
429 static const struct snd_kcontrol_new wm8955_snd_controls[] = {
430 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8955_LEFT_DAC_VOLUME,
431                  WM8955_RIGHT_DAC_VOLUME, 0, 255, 0, digital_tlv),
432 SOC_SINGLE_TLV("Playback Attenuation Volume", WM8955_DAC_CONTROL, 7, 1, 1,
433                atten_tlv),
434 SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
435                     wm8955_get_deemph, wm8955_put_deemph),
436
437 SOC_ENUM("Bass Mode", bass_mode),
438 SOC_ENUM("Bass Cutoff", bass_cutoff),
439 SOC_SINGLE("Bass Volume", WM8955_BASS_CONTROL, 0, 15, 1),
440
441 SOC_ENUM("Treble Cutoff", treble_cutoff),
442 SOC_SINGLE_TLV("Treble Volume", WM8955_TREBLE_CONTROL, 0, 14, 1, treble_tlv),
443
444 SOC_SINGLE_TLV("Left Bypass Volume", WM8955_LEFT_OUT_MIX_1, 4, 7, 1,
445                bypass_tlv),
446 SOC_SINGLE_TLV("Left Mono Volume", WM8955_LEFT_OUT_MIX_2, 4, 7, 1,
447                bypass_tlv),
448
449 SOC_SINGLE_TLV("Right Mono Volume", WM8955_RIGHT_OUT_MIX_1, 4, 7, 1,
450                bypass_tlv),
451 SOC_SINGLE_TLV("Right Bypass Volume", WM8955_RIGHT_OUT_MIX_2, 4, 7, 1,
452                bypass_tlv),
453
454 /* Not a stereo pair so they line up with the DAPM switches */
455 SOC_SINGLE_TLV("Mono Left Bypass Volume", WM8955_MONO_OUT_MIX_1, 4, 7, 1,
456                mono_tlv),
457 SOC_SINGLE_TLV("Mono Right Bypass Volume", WM8955_MONO_OUT_MIX_2, 4, 7, 1,
458                mono_tlv),
459
460 SOC_DOUBLE_R_TLV("Headphone Volume", WM8955_LOUT1_VOLUME,
461                  WM8955_ROUT1_VOLUME, 0, 127, 0, out_tlv),
462 SOC_DOUBLE_R("Headphone ZC Switch", WM8955_LOUT1_VOLUME,
463              WM8955_ROUT1_VOLUME, 7, 1, 0),
464
465 SOC_DOUBLE_R_TLV("Speaker Volume", WM8955_LOUT2_VOLUME,
466                  WM8955_ROUT2_VOLUME, 0, 127, 0, out_tlv),
467 SOC_DOUBLE_R("Speaker ZC Switch", WM8955_LOUT2_VOLUME,
468              WM8955_ROUT2_VOLUME, 7, 1, 0),
469
470 SOC_SINGLE_TLV("Mono Volume", WM8955_MONOOUT_VOLUME, 0, 127, 0, out_tlv),
471 SOC_SINGLE("Mono ZC Switch", WM8955_MONOOUT_VOLUME, 7, 1, 0),
472 };
473
474 static const struct snd_kcontrol_new lmixer[] = {
475 SOC_DAPM_SINGLE("Playback Switch", WM8955_LEFT_OUT_MIX_1, 8, 1, 0),
476 SOC_DAPM_SINGLE("Bypass Switch", WM8955_LEFT_OUT_MIX_1, 7, 1, 0),
477 SOC_DAPM_SINGLE("Right Playback Switch", WM8955_LEFT_OUT_MIX_2, 8, 1, 0),
478 SOC_DAPM_SINGLE("Mono Switch", WM8955_LEFT_OUT_MIX_2, 7, 1, 0),
479 };
480
481 static const struct snd_kcontrol_new rmixer[] = {
482 SOC_DAPM_SINGLE("Left Playback Switch", WM8955_RIGHT_OUT_MIX_1, 8, 1, 0),
483 SOC_DAPM_SINGLE("Mono Switch", WM8955_RIGHT_OUT_MIX_1, 7, 1, 0),
484 SOC_DAPM_SINGLE("Playback Switch", WM8955_RIGHT_OUT_MIX_2, 8, 1, 0),
485 SOC_DAPM_SINGLE("Bypass Switch", WM8955_RIGHT_OUT_MIX_2, 7, 1, 0),
486 };
487
488 static const struct snd_kcontrol_new mmixer[] = {
489 SOC_DAPM_SINGLE("Left Playback Switch", WM8955_MONO_OUT_MIX_1, 8, 1, 0),
490 SOC_DAPM_SINGLE("Left Bypass Switch", WM8955_MONO_OUT_MIX_1, 7, 1, 0),
491 SOC_DAPM_SINGLE("Right Playback Switch", WM8955_MONO_OUT_MIX_2, 8, 1, 0),
492 SOC_DAPM_SINGLE("Right Bypass Switch", WM8955_MONO_OUT_MIX_2, 7, 1, 0),
493 };
494
495 static const struct snd_soc_dapm_widget wm8955_dapm_widgets[] = {
496 SND_SOC_DAPM_INPUT("MONOIN-"),
497 SND_SOC_DAPM_INPUT("MONOIN+"),
498 SND_SOC_DAPM_INPUT("LINEINR"),
499 SND_SOC_DAPM_INPUT("LINEINL"),
500
501 SND_SOC_DAPM_PGA("Mono Input", SND_SOC_NOPM, 0, 0, NULL, 0),
502
503 SND_SOC_DAPM_SUPPLY("SYSCLK", WM8955_POWER_MANAGEMENT_1, 0, 1, wm8955_sysclk,
504                     SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
505 SND_SOC_DAPM_SUPPLY("TSDEN", WM8955_ADDITIONAL_CONTROL_1, 8, 0, NULL, 0),
506
507 SND_SOC_DAPM_DAC("DACL", "Playback", WM8955_POWER_MANAGEMENT_2, 8, 0),
508 SND_SOC_DAPM_DAC("DACR", "Playback", WM8955_POWER_MANAGEMENT_2, 7, 0),
509
510 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8955_POWER_MANAGEMENT_2, 6, 0, NULL, 0),
511 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8955_POWER_MANAGEMENT_2, 5, 0, NULL, 0),
512 SND_SOC_DAPM_PGA("LOUT2 PGA", WM8955_POWER_MANAGEMENT_2, 4, 0, NULL, 0),
513 SND_SOC_DAPM_PGA("ROUT2 PGA", WM8955_POWER_MANAGEMENT_2, 3, 0, NULL, 0),
514 SND_SOC_DAPM_PGA("MOUT PGA", WM8955_POWER_MANAGEMENT_2, 2, 0, NULL, 0),
515 SND_SOC_DAPM_PGA("OUT3 PGA", WM8955_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
516
517 /* The names are chosen to make the control names nice */
518 SND_SOC_DAPM_MIXER("Left", SND_SOC_NOPM, 0, 0,
519                    lmixer, ARRAY_SIZE(lmixer)),
520 SND_SOC_DAPM_MIXER("Right", SND_SOC_NOPM, 0, 0,
521                    rmixer, ARRAY_SIZE(rmixer)),
522 SND_SOC_DAPM_MIXER("Mono", SND_SOC_NOPM, 0, 0,
523                    mmixer, ARRAY_SIZE(mmixer)),
524
525 SND_SOC_DAPM_OUTPUT("LOUT1"),
526 SND_SOC_DAPM_OUTPUT("ROUT1"),
527 SND_SOC_DAPM_OUTPUT("LOUT2"),
528 SND_SOC_DAPM_OUTPUT("ROUT2"),
529 SND_SOC_DAPM_OUTPUT("MONOOUT"),
530 SND_SOC_DAPM_OUTPUT("OUT3"),
531 };
532
533 static const struct snd_soc_dapm_route wm8955_intercon[] = {
534         { "DACL", NULL, "SYSCLK" },
535         { "DACR", NULL, "SYSCLK" },
536
537         { "Mono Input", NULL, "MONOIN-" },
538         { "Mono Input", NULL, "MONOIN+" },
539
540         { "Left", "Playback Switch", "DACL" },
541         { "Left", "Right Playback Switch", "DACR" },
542         { "Left", "Bypass Switch", "LINEINL" },
543         { "Left", "Mono Switch", "Mono Input" },
544
545         { "Right", "Playback Switch", "DACR" },
546         { "Right", "Left Playback Switch", "DACL" },
547         { "Right", "Bypass Switch", "LINEINR" },
548         { "Right", "Mono Switch", "Mono Input" },
549
550         { "Mono", "Left Playback Switch", "DACL" },
551         { "Mono", "Right Playback Switch", "DACR" },
552         { "Mono", "Left Bypass Switch", "LINEINL" },
553         { "Mono", "Right Bypass Switch", "LINEINR" },
554
555         { "LOUT1 PGA", NULL, "Left" },
556         { "LOUT1", NULL, "TSDEN" },
557         { "LOUT1", NULL, "LOUT1 PGA" },
558
559         { "ROUT1 PGA", NULL, "Right" },
560         { "ROUT1", NULL, "TSDEN" },
561         { "ROUT1", NULL, "ROUT1 PGA" },
562
563         { "LOUT2 PGA", NULL, "Left" },
564         { "LOUT2", NULL, "TSDEN" },
565         { "LOUT2", NULL, "LOUT2 PGA" },
566
567         { "ROUT2 PGA", NULL, "Right" },
568         { "ROUT2", NULL, "TSDEN" },
569         { "ROUT2", NULL, "ROUT2 PGA" },
570
571         { "MOUT PGA", NULL, "Mono" },
572         { "MONOOUT", NULL, "MOUT PGA" },
573
574         /* OUT3 not currently implemented */
575         { "OUT3", NULL, "OUT3 PGA" },
576 };
577
578 static int wm8955_add_widgets(struct snd_soc_codec *codec)
579 {
580         struct snd_soc_dapm_context *dapm = &codec->dapm;
581
582         snd_soc_add_controls(codec, wm8955_snd_controls,
583                              ARRAY_SIZE(wm8955_snd_controls));
584
585         snd_soc_dapm_new_controls(dapm, wm8955_dapm_widgets,
586                                   ARRAY_SIZE(wm8955_dapm_widgets));
587         snd_soc_dapm_add_routes(dapm, wm8955_intercon,
588                                 ARRAY_SIZE(wm8955_intercon));
589
590         return 0;
591 }
592
593 static int wm8955_hw_params(struct snd_pcm_substream *substream,
594                             struct snd_pcm_hw_params *params,
595                             struct snd_soc_dai *dai)
596 {
597         struct snd_soc_codec *codec = dai->codec;
598         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
599         int ret;
600         int wl;
601
602         switch (params_format(params)) {
603         case SNDRV_PCM_FORMAT_S16_LE:
604                 wl = 0;
605                 break;
606         case SNDRV_PCM_FORMAT_S20_3LE:
607                 wl = 0x4;
608                 break;
609         case SNDRV_PCM_FORMAT_S24_LE:
610                 wl = 0x8;
611                 break;
612         case SNDRV_PCM_FORMAT_S32_LE:
613                 wl = 0xc;
614                 break;
615         default:
616                 return -EINVAL;
617         }
618         snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
619                             WM8955_WL_MASK, wl);
620
621         wm8955->fs = params_rate(params);
622         wm8955_set_deemph(codec);
623
624         /* If the chip is clocked then disable the clocks and force a
625          * reconfiguration, otherwise DAPM will power up the
626          * clocks for us later. */
627         ret = snd_soc_read(codec, WM8955_POWER_MANAGEMENT_1);
628         if (ret < 0)
629                 return ret;
630         if (ret & WM8955_DIGENB) {
631                 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
632                                     WM8955_DIGENB, 0);
633                 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
634                                     WM8955_PLL_RB | WM8955_PLLEN, 0);
635
636                 wm8955_configure_clocking(codec);
637         }
638
639         return 0;
640 }
641
642
643 static int wm8955_set_sysclk(struct snd_soc_dai *dai, int clk_id,
644                              unsigned int freq, int dir)
645 {
646         struct snd_soc_codec *codec = dai->codec;
647         struct wm8955_priv *priv = snd_soc_codec_get_drvdata(codec);
648         int div;
649
650         switch (clk_id) {
651         case WM8955_CLK_MCLK:
652                 if (freq > 15000000) {
653                         priv->mclk_rate = freq /= 2;
654                         div = WM8955_MCLKDIV2;
655                 } else {
656                         priv->mclk_rate = freq;
657                         div = 0;
658                 }
659
660                 snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
661                                     WM8955_MCLKDIV2, div);
662                 break;
663
664         default:
665                 return -EINVAL;
666         }
667
668         dev_dbg(dai->dev, "Clock source is %d at %uHz\n", clk_id, freq);
669
670         return 0;
671 }
672
673 static int wm8955_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
674 {
675         struct snd_soc_codec *codec = dai->codec;
676         u16 aif = 0;
677
678         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
679         case SND_SOC_DAIFMT_CBS_CFS:
680                 break;
681         case SND_SOC_DAIFMT_CBM_CFM:
682                 aif |= WM8955_MS;
683                 break;
684         default:
685                 return -EINVAL;
686         }
687
688         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
689         case SND_SOC_DAIFMT_DSP_B:
690                 aif |= WM8955_LRP;
691         case SND_SOC_DAIFMT_DSP_A:
692                 aif |= 0x3;
693                 break;
694         case SND_SOC_DAIFMT_I2S:
695                 aif |= 0x2;
696                 break;
697         case SND_SOC_DAIFMT_RIGHT_J:
698                 break;
699         case SND_SOC_DAIFMT_LEFT_J:
700                 aif |= 0x1;
701                 break;
702         default:
703                 return -EINVAL;
704         }
705
706         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
707         case SND_SOC_DAIFMT_DSP_A:
708         case SND_SOC_DAIFMT_DSP_B:
709                 /* frame inversion not valid for DSP modes */
710                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
711                 case SND_SOC_DAIFMT_NB_NF:
712                         break;
713                 case SND_SOC_DAIFMT_IB_NF:
714                         aif |= WM8955_BCLKINV;
715                         break;
716                 default:
717                         return -EINVAL;
718                 }
719                 break;
720
721         case SND_SOC_DAIFMT_I2S:
722         case SND_SOC_DAIFMT_RIGHT_J:
723         case SND_SOC_DAIFMT_LEFT_J:
724                 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
725                 case SND_SOC_DAIFMT_NB_NF:
726                         break;
727                 case SND_SOC_DAIFMT_IB_IF:
728                         aif |= WM8955_BCLKINV | WM8955_LRP;
729                         break;
730                 case SND_SOC_DAIFMT_IB_NF:
731                         aif |= WM8955_BCLKINV;
732                         break;
733                 case SND_SOC_DAIFMT_NB_IF:
734                         aif |= WM8955_LRP;
735                         break;
736                 default:
737                         return -EINVAL;
738                 }
739                 break;
740         default:
741                 return -EINVAL;
742         }
743
744         snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
745                             WM8955_MS | WM8955_FORMAT_MASK | WM8955_BCLKINV |
746                             WM8955_LRP, aif);
747
748         return 0;
749 }
750
751
752 static int wm8955_digital_mute(struct snd_soc_dai *codec_dai, int mute)
753 {
754         struct snd_soc_codec *codec = codec_dai->codec;
755         int val;
756
757         if (mute)
758                 val = WM8955_DACMU;
759         else
760                 val = 0;
761
762         snd_soc_update_bits(codec, WM8955_DAC_CONTROL, WM8955_DACMU, val);
763
764         return 0;
765 }
766
767 static int wm8955_set_bias_level(struct snd_soc_codec *codec,
768                                  enum snd_soc_bias_level level)
769 {
770         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
771         int ret, i;
772
773         switch (level) {
774         case SND_SOC_BIAS_ON:
775                 break;
776
777         case SND_SOC_BIAS_PREPARE:
778                 /* VMID resistance 2*50k */
779                 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
780                                     WM8955_VMIDSEL_MASK,
781                                     0x1 << WM8955_VMIDSEL_SHIFT);
782
783                 /* Default bias current */
784                 snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
785                                     WM8955_VSEL_MASK,
786                                     0x2 << WM8955_VSEL_SHIFT);
787                 break;
788
789         case SND_SOC_BIAS_STANDBY:
790                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
791                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies),
792                                                     wm8955->supplies);
793                         if (ret != 0) {
794                                 dev_err(codec->dev,
795                                         "Failed to enable supplies: %d\n",
796                                         ret);
797                                 return ret;
798                         }
799
800                         /* Sync back cached values if they're
801                          * different from the hardware default.
802                          */
803                         for (i = 0; i < ARRAY_SIZE(wm8955->reg_cache); i++) {
804                                 if (i == WM8955_RESET)
805                                         continue;
806
807                                 if (wm8955->reg_cache[i] == wm8955_reg[i])
808                                         continue;
809
810                                 snd_soc_write(codec, i, wm8955->reg_cache[i]);
811                         }
812
813                         /* Enable VREF and VMID */
814                         snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
815                                             WM8955_VREF |
816                                             WM8955_VMIDSEL_MASK,
817                                             WM8955_VREF |
818                                             0x3 << WM8955_VREF_SHIFT);
819
820                         /* Let VMID ramp */
821                         msleep(500);
822
823                         /* High resistance VROI to maintain outputs */
824                         snd_soc_update_bits(codec,
825                                             WM8955_ADDITIONAL_CONTROL_3,
826                                             WM8955_VROI, WM8955_VROI);
827                 }
828
829                 /* Maintain VMID with 2*250k */
830                 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
831                                     WM8955_VMIDSEL_MASK,
832                                     0x2 << WM8955_VMIDSEL_SHIFT);
833
834                 /* Minimum bias current */
835                 snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
836                                     WM8955_VSEL_MASK, 0);
837                 break;
838
839         case SND_SOC_BIAS_OFF:
840                 /* Low resistance VROI to help discharge */
841                 snd_soc_update_bits(codec,
842                                     WM8955_ADDITIONAL_CONTROL_3,
843                                     WM8955_VROI, 0);
844
845                 /* Turn off VMID and VREF */
846                 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
847                                     WM8955_VREF |
848                                     WM8955_VMIDSEL_MASK, 0);
849
850                 regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies),
851                                        wm8955->supplies);
852                 break;
853         }
854         codec->dapm.bias_level = level;
855         return 0;
856 }
857
858 #define WM8955_RATES SNDRV_PCM_RATE_8000_96000
859
860 #define WM8955_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
861                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
862
863 static struct snd_soc_dai_ops wm8955_dai_ops = {
864         .set_sysclk = wm8955_set_sysclk,
865         .set_fmt = wm8955_set_fmt,
866         .hw_params = wm8955_hw_params,
867         .digital_mute = wm8955_digital_mute,
868 };
869
870 static struct snd_soc_dai_driver wm8955_dai = {
871         .name = "wm8955-hifi",
872         .playback = {
873                 .stream_name = "Playback",
874                 .channels_min = 2,
875                 .channels_max = 2,
876                 .rates = WM8955_RATES,
877                 .formats = WM8955_FORMATS,
878         },
879         .ops = &wm8955_dai_ops,
880 };
881
882 #ifdef CONFIG_PM
883 static int wm8955_suspend(struct snd_soc_codec *codec, pm_message_t state)
884 {
885         wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF);
886
887         return 0;
888 }
889
890 static int wm8955_resume(struct snd_soc_codec *codec)
891 {
892         wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
893
894         return 0;
895 }
896 #else
897 #define wm8955_suspend NULL
898 #define wm8955_resume NULL
899 #endif
900
901 static int wm8955_probe(struct snd_soc_codec *codec)
902 {
903         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
904         struct wm8955_pdata *pdata = dev_get_platdata(codec->dev);
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         wm8955->reg_cache[WM8955_LEFT_DAC_VOLUME] |= WM8955_LDVU;
938         wm8955->reg_cache[WM8955_RIGHT_DAC_VOLUME] |= WM8955_RDVU;
939         wm8955->reg_cache[WM8955_LOUT1_VOLUME] |= WM8955_LO1VU | WM8955_LO1ZC;
940         wm8955->reg_cache[WM8955_ROUT1_VOLUME] |= WM8955_RO1VU | WM8955_RO1ZC;
941         wm8955->reg_cache[WM8955_LOUT2_VOLUME] |= WM8955_LO2VU | WM8955_LO2ZC;
942         wm8955->reg_cache[WM8955_ROUT2_VOLUME] |= WM8955_RO2VU | WM8955_RO2ZC;
943         wm8955->reg_cache[WM8955_MONOOUT_VOLUME] |= WM8955_MOZC;
944
945         /* Also enable adaptive bass boost by default */
946         wm8955->reg_cache[WM8955_BASS_CONTROL] |= WM8955_BB;
947
948         /* Set platform data values */
949         if (pdata) {
950                 if (pdata->out2_speaker)
951                         wm8955->reg_cache[WM8955_ADDITIONAL_CONTROL_2]
952                                 |= WM8955_ROUT2INV;
953
954                 if (pdata->monoin_diff)
955                         wm8955->reg_cache[WM8955_MONO_OUT_MIX_1]
956                                 |= WM8955_DMEN;
957         }
958
959         wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
960
961         /* Bias level configuration will have done an extra enable */
962         regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
963
964         wm8955_add_widgets(codec);
965         return 0;
966
967 err_enable:
968         regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
969 err_get:
970         regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
971         return ret;
972 }
973
974 static int wm8955_remove(struct snd_soc_codec *codec)
975 {
976         struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
977
978         wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF);
979         regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
980         return 0;
981 }
982
983 static struct snd_soc_codec_driver soc_codec_dev_wm8955 = {
984         .probe =        wm8955_probe,
985         .remove =       wm8955_remove,
986         .suspend =      wm8955_suspend,
987         .resume =       wm8955_resume,
988         .set_bias_level = wm8955_set_bias_level,
989         .reg_cache_size = ARRAY_SIZE(wm8955_reg),
990         .reg_word_size = sizeof(u16),
991         .reg_cache_default = wm8955_reg,
992 };
993
994 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
995 static __devinit int wm8955_i2c_probe(struct i2c_client *i2c,
996                                       const struct i2c_device_id *id)
997 {
998         struct wm8955_priv *wm8955;
999         int ret;
1000
1001         wm8955 = kzalloc(sizeof(struct wm8955_priv), GFP_KERNEL);
1002         if (wm8955 == NULL)
1003                 return -ENOMEM;
1004
1005         i2c_set_clientdata(i2c, wm8955);
1006
1007         ret = snd_soc_register_codec(&i2c->dev,
1008                         &soc_codec_dev_wm8955, &wm8955_dai, 1);
1009         if (ret < 0)
1010                 kfree(wm8955);
1011         return ret;
1012 }
1013
1014 static __devexit int wm8955_i2c_remove(struct i2c_client *client)
1015 {
1016         snd_soc_unregister_codec(&client->dev);
1017         kfree(i2c_get_clientdata(client));
1018         return 0;
1019 }
1020
1021 static const struct i2c_device_id wm8955_i2c_id[] = {
1022         { "wm8955", 0 },
1023         { }
1024 };
1025 MODULE_DEVICE_TABLE(i2c, wm8955_i2c_id);
1026
1027 static struct i2c_driver wm8955_i2c_driver = {
1028         .driver = {
1029                 .name = "wm8955-codec",
1030                 .owner = THIS_MODULE,
1031         },
1032         .probe =    wm8955_i2c_probe,
1033         .remove =   __devexit_p(wm8955_i2c_remove),
1034         .id_table = wm8955_i2c_id,
1035 };
1036 #endif
1037
1038 static int __init wm8955_modinit(void)
1039 {
1040         int ret = 0;
1041 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1042         ret = i2c_add_driver(&wm8955_i2c_driver);
1043         if (ret != 0) {
1044                 printk(KERN_ERR "Failed to register WM8955 I2C driver: %d\n",
1045                        ret);
1046         }
1047 #endif
1048         return ret;
1049 }
1050 module_init(wm8955_modinit);
1051
1052 static void __exit wm8955_exit(void)
1053 {
1054 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1055         i2c_del_driver(&wm8955_i2c_driver);
1056 #endif
1057 }
1058 module_exit(wm8955_exit);
1059
1060 MODULE_DESCRIPTION("ASoC WM8955 driver");
1061 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1062 MODULE_LICENSE("GPL");