?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux/fpc-iii.git] / sound / soc / codecs / wm8955.c
blobfedb76452f1b8306f85e5a986463516efb0e0193
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/soc-dapm.h>
27 #include <sound/initval.h>
28 #include <sound/tlv.h>
29 #include <sound/wm8955.h>
30
31 #include "wm8955.h"
32
33 static struct snd_soc_codec *wm8955_codec;
34 struct snd_soc_codec_device soc_codec_dev_wm8955;
35
36 #define WM8955_NUM_SUPPLIES 4
37 static const char *wm8955_supply_names[WM8955_NUM_SUPPLIES] = {
38 "DCVDD",
39 "DBVDD",
40 "HPVDD",
41 "AVDD",
42 };
43
44 /* codec private data */
45 struct wm8955_priv {
46 struct snd_soc_codec codec;
47 u16 reg_cache[WM8955_MAX_REGISTER + 1];
48
49 unsigned int mclk_rate;
50
51 int deemph;
52 int fs;
53
54 struct regulator_bulk_data supplies[WM8955_NUM_SUPPLIES];
55
56 struct wm8955_pdata *pdata;
57 };
58
59 static const u16 wm8955_reg[WM8955_MAX_REGISTER + 1] = {
60 0x0000, /* R0 */
61 0x0000, /* R1 */
62 0x0079, /* R2 - LOUT1 volume */
63 0x0079, /* R3 - ROUT1 volume */
64 0x0000, /* R4 */
65 0x0008, /* R5 - DAC Control */
66 0x0000, /* R6 */
67 0x000A, /* R7 - Audio Interface */
68 0x0000, /* R8 - Sample Rate */
69 0x0000, /* R9 */
70 0x00FF, /* R10 - Left DAC volume */
71 0x00FF, /* R11 - Right DAC volume */
72 0x000F, /* R12 - Bass control */
73 0x000F, /* R13 - Treble control */
74 0x0000, /* R14 */
75 0x0000, /* R15 - Reset */
76 0x0000, /* R16 */
77 0x0000, /* R17 */
78 0x0000, /* R18 */
79 0x0000, /* R19 */
80 0x0000, /* R20 */
81 0x0000, /* R21 */
82 0x0000, /* R22 */
83 0x00C1, /* R23 - Additional control (1) */
84 0x0000, /* R24 - Additional control (2) */
85 0x0000, /* R25 - Power Management (1) */
86 0x0000, /* R26 - Power Management (2) */
87 0x0000, /* R27 - Additional Control (3) */
88 0x0000, /* R28 */
89 0x0000, /* R29 */
90 0x0000, /* R30 */
91 0x0000, /* R31 */
92 0x0000, /* R32 */
93 0x0000, /* R33 */
94 0x0050, /* R34 - Left out Mix (1) */
95 0x0050, /* R35 - Left out Mix (2) */
96 0x0050, /* R36 - Right out Mix (1) */
97 0x0050, /* R37 - Right Out Mix (2) */
98 0x0050, /* R38 - Mono out Mix (1) */
99 0x0050, /* R39 - Mono out Mix (2) */
100 0x0079, /* R40 - LOUT2 volume */
101 0x0079, /* R41 - ROUT2 volume */
102 0x0079, /* R42 - MONOOUT volume */
103 0x0000, /* R43 - Clocking / PLL */
104 0x0103, /* R44 - PLL Control 1 */
105 0x0024, /* R45 - PLL Control 2 */
106 0x01BA, /* R46 - PLL Control 3 */
107 0x0000, /* R47 */
108 0x0000, /* R48 */
109 0x0000, /* R49 */
110 0x0000, /* R50 */
111 0x0000, /* R51 */
112 0x0000, /* R52 */
113 0x0000, /* R53 */
114 0x0000, /* R54 */
115 0x0000, /* R55 */
116 0x0000, /* R56 */
117 0x0000, /* R57 */
118 0x0000, /* R58 */
119 0x0000, /* R59 - PLL Control 4 */
120 };
121
122 static int wm8955_reset(struct snd_soc_codec *codec)
123 {
124 return snd_soc_write(codec, WM8955_RESET, 0);
125 }
126
127 struct pll_factors {
128 int n;
129 int k;
130 int outdiv;
131 };
132
133 /* The size in bits of the FLL divide multiplied by 10
134 * to allow rounding later */
135 #define FIXED_FLL_SIZE ((1 << 22) * 10)
136
137 static int wm8995_pll_factors(struct device *dev,
138 int Fref, int Fout, struct pll_factors *pll)
139 {
140 u64 Kpart;
141 unsigned int K, Ndiv, Nmod, target;
142
143 dev_dbg(dev, "Fref=%u Fout=%u\n", Fref, Fout);
144
145 /* The oscilator should run at should be 90-100MHz, and
146 * there's a divide by 4 plus an optional divide by 2 in the
147 * output path to generate the system clock. The clock table
148 * is sortd so we should always generate a suitable target. */
149 target = Fout * 4;
150 if (target < 90000000) {
151 pll->outdiv = 1;
152 target *= 2;
153 } else {
154 pll->outdiv = 0;
155 }
156
157 WARN_ON(target < 90000000 || target > 100000000);
158
159 dev_dbg(dev, "Fvco=%dHz\n", target);
160
161 /* Now, calculate N.K */
162 Ndiv = target / Fref;
163
164 pll->n = Ndiv;
165 Nmod = target % Fref;
166 dev_dbg(dev, "Nmod=%d\n", Nmod);
167
168 /* Calculate fractional part - scale up so we can round. */
169 Kpart = FIXED_FLL_SIZE * (long long)Nmod;
170
171 do_div(Kpart, Fref);
172
173 K = Kpart & 0xFFFFFFFF;
174
175 if ((K % 10) >= 5)
176 K += 5;
177
178 /* Move down to proper range now rounding is done */
179 pll->k = K / 10;
180
181 dev_dbg(dev, "N=%x K=%x OUTDIV=%x\n", pll->n, pll->k, pll->outdiv);
182
183 return 0;
184 }
185
186 /* Lookup table specifiying SRATE (table 25 in datasheet); some of the
187 * output frequencies have been rounded to the standard frequencies
188 * they are intended to match where the error is slight. */
189 static struct {
190 int mclk;
191 int fs;
192 int usb;
193 int sr;
194 } clock_cfgs[] = {
195 { 18432000, 8000, 0, 3, },
196 { 18432000, 12000, 0, 9, },
197 { 18432000, 16000, 0, 11, },
198 { 18432000, 24000, 0, 29, },
199 { 18432000, 32000, 0, 13, },
200 { 18432000, 48000, 0, 1, },
201 { 18432000, 96000, 0, 15, },
202
203 { 16934400, 8018, 0, 19, },
204 { 16934400, 11025, 0, 25, },
205 { 16934400, 22050, 0, 27, },
206 { 16934400, 44100, 0, 17, },
207 { 16934400, 88200, 0, 31, },
208
209 { 12000000, 8000, 1, 2, },
210 { 12000000, 11025, 1, 25, },
211 { 12000000, 12000, 1, 8, },
212 { 12000000, 16000, 1, 10, },
213 { 12000000, 22050, 1, 27, },
214 { 12000000, 24000, 1, 28, },
215 { 12000000, 32000, 1, 12, },
216 { 12000000, 44100, 1, 17, },
217 { 12000000, 48000, 1, 0, },
218 { 12000000, 88200, 1, 31, },
219 { 12000000, 96000, 1, 14, },
220
221 { 12288000, 8000, 0, 2, },
222 { 12288000, 12000, 0, 8, },
223 { 12288000, 16000, 0, 10, },
224 { 12288000, 24000, 0, 28, },
225 { 12288000, 32000, 0, 12, },
226 { 12288000, 48000, 0, 0, },
227 { 12288000, 96000, 0, 14, },
228
229 { 12289600, 8018, 0, 18, },
230 { 12289600, 11025, 0, 24, },
231 { 12289600, 22050, 0, 26, },
232 { 11289600, 44100, 0, 16, },
233 { 11289600, 88200, 0, 31, },
234 };
235
236 static int wm8955_configure_clocking(struct snd_soc_codec *codec)
237 {
238 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
239 int i, ret, val;
240 int clocking = 0;
241 int srate = 0;
242 int sr = -1;
243 struct pll_factors pll;
244
245 /* If we're not running a sample rate currently just pick one */
246 if (wm8955->fs == 0)
247 wm8955->fs = 8000;
248
249 /* Can we generate an exact output? */
250 for (i = 0; i < ARRAY_SIZE(clock_cfgs); i++) {
251 if (wm8955->fs != clock_cfgs[i].fs)
252 continue;
253 sr = i;
254
255 if (wm8955->mclk_rate == clock_cfgs[i].mclk)
256 break;
257 }
258
259 /* We should never get here with an unsupported sample rate */
260 if (sr == -1) {
261 dev_err(codec->dev, "Sample rate %dHz unsupported\n",
262 wm8955->fs);
263 WARN_ON(sr == -1);
264 return -EINVAL;
265 }
266
267 if (i == ARRAY_SIZE(clock_cfgs)) {
268 /* If we can't generate the right clock from MCLK then
269 * we should configure the PLL to supply us with an
270 * appropriate clock.
271 */
272 clocking |= WM8955_MCLKSEL;
273
274 /* Use the last divider configuration we saw for the
275 * sample rate. */
276 ret = wm8995_pll_factors(codec->dev, wm8955->mclk_rate,
277 clock_cfgs[sr].mclk, &pll);
278 if (ret != 0) {
279 dev_err(codec->dev,
280 "Unable to generate %dHz from %dHz MCLK\n",
281 wm8955->fs, wm8955->mclk_rate);
282 return -EINVAL;
283 }
284
285 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_1,
286 WM8955_N_MASK | WM8955_K_21_18_MASK,
287 (pll.n << WM8955_N_SHIFT) |
288 pll.k >> 18);
289 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
290 WM8955_K_17_9_MASK,
291 (pll.k >> 9) & WM8955_K_17_9_MASK);
292 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
293 WM8955_K_8_0_MASK,
294 pll.k & WM8955_K_8_0_MASK);
295 if (pll.k)
296 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
297 WM8955_KEN, WM8955_KEN);
298 else
299 snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
300 WM8955_KEN, 0);
301
302 if (pll.outdiv)
303 val = WM8955_PLL_RB | WM8955_PLLOUTDIV2;
304 else
305 val = WM8955_PLL_RB;
306
307 /* Now start the PLL running */
308 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
309 WM8955_PLL_RB | WM8955_PLLOUTDIV2, val);
310 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
311 WM8955_PLLEN, WM8955_PLLEN);
312 }
313
314 srate = clock_cfgs[sr].usb | (clock_cfgs[sr].sr << WM8955_SR_SHIFT);
315
316 snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
317 WM8955_USB | WM8955_SR_MASK, srate);
318 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
319 WM8955_MCLKSEL, clocking);
320
321 return 0;
322 }
323
324 static int wm8955_sysclk(struct snd_soc_dapm_widget *w,
325 struct snd_kcontrol *kcontrol, int event)
326 {
327 struct snd_soc_codec *codec = w->codec;
328 int ret = 0;
329
330 /* Always disable the clocks - if we're doing reconfiguration this
331 * avoids misclocking.
332 */
333 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
334 WM8955_DIGENB, 0);
335 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
336 WM8955_PLL_RB | WM8955_PLLEN, 0);
337
338 switch (event) {
339 case SND_SOC_DAPM_POST_PMD:
340 break;
341 case SND_SOC_DAPM_PRE_PMU:
342 ret = wm8955_configure_clocking(codec);
343 break;
344 default:
345 ret = -EINVAL;
346 break;
347 }
348
349 return ret;
350 }
351
352 static int deemph_settings[] = { 0, 32000, 44100, 48000 };
353
354 static int wm8955_set_deemph(struct snd_soc_codec *codec)
355 {
356 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
357 int val, i, best;
358
359 /* If we're using deemphasis select the nearest available sample
360 * rate.
361 */
362 if (wm8955->deemph) {
363 best = 1;
364 for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
365 if (abs(deemph_settings[i] - wm8955->fs) <
366 abs(deemph_settings[best] - wm8955->fs))
367 best = i;
368 }
369
370 val = best << WM8955_DEEMPH_SHIFT;
371 } else {
372 val = 0;
373 }
374
375 dev_dbg(codec->dev, "Set deemphasis %d\n", val);
376
377 return snd_soc_update_bits(codec, WM8955_DAC_CONTROL,
378 WM8955_DEEMPH_MASK, val);
379 }
380
381 static int wm8955_get_deemph(struct snd_kcontrol *kcontrol,
382 struct snd_ctl_elem_value *ucontrol)
383 {
384 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
385 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
386
387 return wm8955->deemph;
388 }
389
390 static int wm8955_put_deemph(struct snd_kcontrol *kcontrol,
391 struct snd_ctl_elem_value *ucontrol)
392 {
393 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
394 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
395 int deemph = ucontrol->value.enumerated.item[0];
396
397 if (deemph > 1)
398 return -EINVAL;
399
400 wm8955->deemph = deemph;
401
402 return wm8955_set_deemph(codec);
403 }
404
405 static const char *bass_mode_text[] = {
406 "Linear", "Adaptive",
407 };
408
409 static const struct soc_enum bass_mode =
410 SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 7, 2, bass_mode_text);
411
412 static const char *bass_cutoff_text[] = {
413 "Low", "High"
414 };
415
416 static const struct soc_enum bass_cutoff =
417 SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 6, 2, bass_cutoff_text);
418
419 static const char *treble_cutoff_text[] = {
420 "High", "Low"
421 };
422
423 static const struct soc_enum treble_cutoff =
424 SOC_ENUM_SINGLE(WM8955_TREBLE_CONTROL, 6, 2, treble_cutoff_text);
425
426 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
427 static const DECLARE_TLV_DB_SCALE(atten_tlv, -600, 600, 0);
428 static const DECLARE_TLV_DB_SCALE(bypass_tlv, -1500, 300, 0);
429 static const DECLARE_TLV_DB_SCALE(mono_tlv, -2100, 300, 0);
430 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
431 static const DECLARE_TLV_DB_SCALE(treble_tlv, -1200, 150, 1);
432
433 static const struct snd_kcontrol_new wm8955_snd_controls[] = {
434 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8955_LEFT_DAC_VOLUME,
435 WM8955_RIGHT_DAC_VOLUME, 0, 255, 0, digital_tlv),
436 SOC_SINGLE_TLV("Playback Attenuation Volume", WM8955_DAC_CONTROL, 7, 1, 1,
437 atten_tlv),
438 SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
439 wm8955_get_deemph, wm8955_put_deemph),
440
441 SOC_ENUM("Bass Mode", bass_mode),
442 SOC_ENUM("Bass Cutoff", bass_cutoff),
443 SOC_SINGLE("Bass Volume", WM8955_BASS_CONTROL, 0, 15, 1),
444
445 SOC_ENUM("Treble Cutoff", treble_cutoff),
446 SOC_SINGLE_TLV("Treble Volume", WM8955_TREBLE_CONTROL, 0, 14, 1, treble_tlv),
447
448 SOC_SINGLE_TLV("Left Bypass Volume", WM8955_LEFT_OUT_MIX_1, 4, 7, 1,
449 bypass_tlv),
450 SOC_SINGLE_TLV("Left Mono Volume", WM8955_LEFT_OUT_MIX_2, 4, 7, 1,
451 bypass_tlv),
452
453 SOC_SINGLE_TLV("Right Mono Volume", WM8955_RIGHT_OUT_MIX_1, 4, 7, 1,
454 bypass_tlv),
455 SOC_SINGLE_TLV("Right Bypass Volume", WM8955_RIGHT_OUT_MIX_2, 4, 7, 1,
456 bypass_tlv),
457
458 /* Not a stereo pair so they line up with the DAPM switches */
459 SOC_SINGLE_TLV("Mono Left Bypass Volume", WM8955_MONO_OUT_MIX_1, 4, 7, 1,
460 mono_tlv),
461 SOC_SINGLE_TLV("Mono Right Bypass Volume", WM8955_MONO_OUT_MIX_2, 4, 7, 1,
462 mono_tlv),
463
464 SOC_DOUBLE_R_TLV("Headphone Volume", WM8955_LOUT1_VOLUME,
465 WM8955_ROUT1_VOLUME, 0, 127, 0, out_tlv),
466 SOC_DOUBLE_R("Headphone ZC Switch", WM8955_LOUT1_VOLUME,
467 WM8955_ROUT1_VOLUME, 7, 1, 0),
468
469 SOC_DOUBLE_R_TLV("Speaker Volume", WM8955_LOUT2_VOLUME,
470 WM8955_ROUT2_VOLUME, 0, 127, 0, out_tlv),
471 SOC_DOUBLE_R("Speaker ZC Switch", WM8955_LOUT2_VOLUME,
472 WM8955_ROUT2_VOLUME, 7, 1, 0),
473
474 SOC_SINGLE_TLV("Mono Volume", WM8955_MONOOUT_VOLUME, 0, 127, 0, out_tlv),
475 SOC_SINGLE("Mono ZC Switch", WM8955_MONOOUT_VOLUME, 7, 1, 0),
476 };
477
478 static const struct snd_kcontrol_new lmixer[] = {
479 SOC_DAPM_SINGLE("Playback Switch", WM8955_LEFT_OUT_MIX_1, 8, 1, 0),
480 SOC_DAPM_SINGLE("Bypass Switch", WM8955_LEFT_OUT_MIX_1, 7, 1, 0),
481 SOC_DAPM_SINGLE("Right Playback Switch", WM8955_LEFT_OUT_MIX_2, 8, 1, 0),
482 SOC_DAPM_SINGLE("Mono Switch", WM8955_LEFT_OUT_MIX_2, 7, 1, 0),
483 };
484
485 static const struct snd_kcontrol_new rmixer[] = {
486 SOC_DAPM_SINGLE("Left Playback Switch", WM8955_RIGHT_OUT_MIX_1, 8, 1, 0),
487 SOC_DAPM_SINGLE("Mono Switch", WM8955_RIGHT_OUT_MIX_1, 7, 1, 0),
488 SOC_DAPM_SINGLE("Playback Switch", WM8955_RIGHT_OUT_MIX_2, 8, 1, 0),
489 SOC_DAPM_SINGLE("Bypass Switch", WM8955_RIGHT_OUT_MIX_2, 7, 1, 0),
490 };
491
492 static const struct snd_kcontrol_new mmixer[] = {
493 SOC_DAPM_SINGLE("Left Playback Switch", WM8955_MONO_OUT_MIX_1, 8, 1, 0),
494 SOC_DAPM_SINGLE("Left Bypass Switch", WM8955_MONO_OUT_MIX_1, 7, 1, 0),
495 SOC_DAPM_SINGLE("Right Playback Switch", WM8955_MONO_OUT_MIX_2, 8, 1, 0),
496 SOC_DAPM_SINGLE("Right Bypass Switch", WM8955_MONO_OUT_MIX_2, 7, 1, 0),
497 };
498
499 static const struct snd_soc_dapm_widget wm8955_dapm_widgets[] = {
500 SND_SOC_DAPM_INPUT("MONOIN-"),
501 SND_SOC_DAPM_INPUT("MONOIN+"),
502 SND_SOC_DAPM_INPUT("LINEINR"),
503 SND_SOC_DAPM_INPUT("LINEINL"),
504
505 SND_SOC_DAPM_PGA("Mono Input", SND_SOC_NOPM, 0, 0, NULL, 0),
506
507 SND_SOC_DAPM_SUPPLY("SYSCLK", WM8955_POWER_MANAGEMENT_1, 0, 1, wm8955_sysclk,
508 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
509 SND_SOC_DAPM_SUPPLY("TSDEN", WM8955_ADDITIONAL_CONTROL_1, 8, 0, NULL, 0),
510
511 SND_SOC_DAPM_DAC("DACL", "Playback", WM8955_POWER_MANAGEMENT_2, 8, 0),
512 SND_SOC_DAPM_DAC("DACR", "Playback", WM8955_POWER_MANAGEMENT_2, 7, 0),
513
514 SND_SOC_DAPM_PGA("LOUT1 PGA", WM8955_POWER_MANAGEMENT_2, 6, 0, NULL, 0),
515 SND_SOC_DAPM_PGA("ROUT1 PGA", WM8955_POWER_MANAGEMENT_2, 5, 0, NULL, 0),
516 SND_SOC_DAPM_PGA("LOUT2 PGA", WM8955_POWER_MANAGEMENT_2, 4, 0, NULL, 0),
517 SND_SOC_DAPM_PGA("ROUT2 PGA", WM8955_POWER_MANAGEMENT_2, 3, 0, NULL, 0),
518 SND_SOC_DAPM_PGA("MOUT PGA", WM8955_POWER_MANAGEMENT_2, 2, 0, NULL, 0),
519 SND_SOC_DAPM_PGA("OUT3 PGA", WM8955_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
520
521 /* The names are chosen to make the control names nice */
522 SND_SOC_DAPM_MIXER("Left", SND_SOC_NOPM, 0, 0,
523 lmixer, ARRAY_SIZE(lmixer)),
524 SND_SOC_DAPM_MIXER("Right", SND_SOC_NOPM, 0, 0,
525 rmixer, ARRAY_SIZE(rmixer)),
526 SND_SOC_DAPM_MIXER("Mono", SND_SOC_NOPM, 0, 0,
527 mmixer, ARRAY_SIZE(mmixer)),
528
529 SND_SOC_DAPM_OUTPUT("LOUT1"),
530 SND_SOC_DAPM_OUTPUT("ROUT1"),
531 SND_SOC_DAPM_OUTPUT("LOUT2"),
532 SND_SOC_DAPM_OUTPUT("ROUT2"),
533 SND_SOC_DAPM_OUTPUT("MONOOUT"),
534 SND_SOC_DAPM_OUTPUT("OUT3"),
535 };
536
537 static const struct snd_soc_dapm_route wm8955_intercon[] = {
538 { "DACL", NULL, "SYSCLK" },
539 { "DACR", NULL, "SYSCLK" },
540
541 { "Mono Input", NULL, "MONOIN-" },
542 { "Mono Input", NULL, "MONOIN+" },
543
544 { "Left", "Playback Switch", "DACL" },
545 { "Left", "Right Playback Switch", "DACR" },
546 { "Left", "Bypass Switch", "LINEINL" },
547 { "Left", "Mono Switch", "Mono Input" },
548
549 { "Right", "Playback Switch", "DACR" },
550 { "Right", "Left Playback Switch", "DACL" },
551 { "Right", "Bypass Switch", "LINEINR" },
552 { "Right", "Mono Switch", "Mono Input" },
553
554 { "Mono", "Left Playback Switch", "DACL" },
555 { "Mono", "Right Playback Switch", "DACR" },
556 { "Mono", "Left Bypass Switch", "LINEINL" },
557 { "Mono", "Right Bypass Switch", "LINEINR" },
558
559 { "LOUT1 PGA", NULL, "Left" },
560 { "LOUT1", NULL, "TSDEN" },
561 { "LOUT1", NULL, "LOUT1 PGA" },
562
563 { "ROUT1 PGA", NULL, "Right" },
564 { "ROUT1", NULL, "TSDEN" },
565 { "ROUT1", NULL, "ROUT1 PGA" },
566
567 { "LOUT2 PGA", NULL, "Left" },
568 { "LOUT2", NULL, "TSDEN" },
569 { "LOUT2", NULL, "LOUT2 PGA" },
570
571 { "ROUT2 PGA", NULL, "Right" },
572 { "ROUT2", NULL, "TSDEN" },
573 { "ROUT2", NULL, "ROUT2 PGA" },
574
575 { "MOUT PGA", NULL, "Mono" },
576 { "MONOOUT", NULL, "MOUT PGA" },
577
578 /* OUT3 not currently implemented */
579 { "OUT3", NULL, "OUT3 PGA" },
580 };
581
582 static int wm8955_add_widgets(struct snd_soc_codec *codec)
583 {
584 snd_soc_add_controls(codec, wm8955_snd_controls,
585 ARRAY_SIZE(wm8955_snd_controls));
586
587 snd_soc_dapm_new_controls(codec, wm8955_dapm_widgets,
588 ARRAY_SIZE(wm8955_dapm_widgets));
589
590 snd_soc_dapm_add_routes(codec, wm8955_intercon,
591 ARRAY_SIZE(wm8955_intercon));
592
593 return 0;
594 }
595
596 static int wm8955_hw_params(struct snd_pcm_substream *substream,
597 struct snd_pcm_hw_params *params,
598 struct snd_soc_dai *dai)
599 {
600 struct snd_soc_codec *codec = dai->codec;
601 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
602 int ret;
603 int wl;
604
605 switch (params_format(params)) {
606 case SNDRV_PCM_FORMAT_S16_LE:
607 wl = 0;
608 break;
609 case SNDRV_PCM_FORMAT_S20_3LE:
610 wl = 0x4;
611 break;
612 case SNDRV_PCM_FORMAT_S24_LE:
613 wl = 0x8;
614 break;
615 case SNDRV_PCM_FORMAT_S32_LE:
616 wl = 0xc;
617 break;
618 default:
619 return -EINVAL;
620 }
621 snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
622 WM8955_WL_MASK, wl);
623
624 wm8955->fs = params_rate(params);
625 wm8955_set_deemph(codec);
626
627 /* If the chip is clocked then disable the clocks and force a
628 * reconfiguration, otherwise DAPM will power up the
629 * clocks for us later. */
630 ret = snd_soc_read(codec, WM8955_POWER_MANAGEMENT_1);
631 if (ret < 0)
632 return ret;
633 if (ret & WM8955_DIGENB) {
634 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
635 WM8955_DIGENB, 0);
636 snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
637 WM8955_PLL_RB | WM8955_PLLEN, 0);
638
639 wm8955_configure_clocking(codec);
640 }
641
642 return 0;
643 }
644
645
646 static int wm8955_set_sysclk(struct snd_soc_dai *dai, int clk_id,
647 unsigned int freq, int dir)
648 {
649 struct snd_soc_codec *codec = dai->codec;
650 struct wm8955_priv *priv = snd_soc_codec_get_drvdata(codec);
651 int div;
652
653 switch (clk_id) {
654 case WM8955_CLK_MCLK:
655 if (freq > 15000000) {
656 priv->mclk_rate = freq /= 2;
657 div = WM8955_MCLKDIV2;
658 } else {
659 priv->mclk_rate = freq;
660 div = 0;
661 }
662
663 snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
664 WM8955_MCLKDIV2, div);
665 break;
666
667 default:
668 return -EINVAL;
669 }
670
671 dev_dbg(dai->dev, "Clock source is %d at %uHz\n", clk_id, freq);
672
673 return 0;
674 }
675
676 static int wm8955_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
677 {
678 struct snd_soc_codec *codec = dai->codec;
679 u16 aif = 0;
680
681 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
682 case SND_SOC_DAIFMT_CBS_CFS:
683 break;
684 case SND_SOC_DAIFMT_CBM_CFM:
685 aif |= WM8955_MS;
686 break;
687 default:
688 return -EINVAL;
689 }
690
691 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
692 case SND_SOC_DAIFMT_DSP_B:
693 aif |= WM8955_LRP;
694 case SND_SOC_DAIFMT_DSP_A:
695 aif |= 0x3;
696 break;
697 case SND_SOC_DAIFMT_I2S:
698 aif |= 0x2;
699 break;
700 case SND_SOC_DAIFMT_RIGHT_J:
701 break;
702 case SND_SOC_DAIFMT_LEFT_J:
703 aif |= 0x1;
704 break;
705 default:
706 return -EINVAL;
707 }
708
709 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
710 case SND_SOC_DAIFMT_DSP_A:
711 case SND_SOC_DAIFMT_DSP_B:
712 /* frame inversion not valid for DSP modes */
713 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
714 case SND_SOC_DAIFMT_NB_NF:
715 break;
716 case SND_SOC_DAIFMT_IB_NF:
717 aif |= WM8955_BCLKINV;
718 break;
719 default:
720 return -EINVAL;
721 }
722 break;
723
724 case SND_SOC_DAIFMT_I2S:
725 case SND_SOC_DAIFMT_RIGHT_J:
726 case SND_SOC_DAIFMT_LEFT_J:
727 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
728 case SND_SOC_DAIFMT_NB_NF:
729 break;
730 case SND_SOC_DAIFMT_IB_IF:
731 aif |= WM8955_BCLKINV | WM8955_LRP;
732 break;
733 case SND_SOC_DAIFMT_IB_NF:
734 aif |= WM8955_BCLKINV;
735 break;
736 case SND_SOC_DAIFMT_NB_IF:
737 aif |= WM8955_LRP;
738 break;
739 default:
740 return -EINVAL;
741 }
742 break;
743 default:
744 return -EINVAL;
745 }
746
747 snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
748 WM8955_MS | WM8955_FORMAT_MASK | WM8955_BCLKINV |
749 WM8955_LRP, aif);
750
751 return 0;
752 }
753
754
755 static int wm8955_digital_mute(struct snd_soc_dai *codec_dai, int mute)
756 {
757 struct snd_soc_codec *codec = codec_dai->codec;
758 int val;
759
760 if (mute)
761 val = WM8955_DACMU;
762 else
763 val = 0;
764
765 snd_soc_update_bits(codec, WM8955_DAC_CONTROL, WM8955_DACMU, val);
766
767 return 0;
768 }
769
770 static int wm8955_set_bias_level(struct snd_soc_codec *codec,
771 enum snd_soc_bias_level level)
772 {
773 struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
774 int ret, i;
775
776 switch (level) {
777 case SND_SOC_BIAS_ON:
778 break;
779
780 case SND_SOC_BIAS_PREPARE:
781 /* VMID resistance 2*50k */
782 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
783 WM8955_VMIDSEL_MASK,
784 0x1 << WM8955_VMIDSEL_SHIFT);
785
786 /* Default bias current */
787 snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
788 WM8955_VSEL_MASK,
789 0x2 << WM8955_VSEL_SHIFT);
790 break;
791
792 case SND_SOC_BIAS_STANDBY:
793 if (codec->bias_level == SND_SOC_BIAS_OFF) {
794 ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies),
795 wm8955->supplies);
796 if (ret != 0) {
797 dev_err(codec->dev,
798 "Failed to enable supplies: %d\n",
799 ret);
800 return ret;
801 }
802
803 /* Sync back cached values if they're
804 * different from the hardware default.
805 */
806 for (i = 0; i < ARRAY_SIZE(wm8955->reg_cache); i++) {
807 if (i == WM8955_RESET)
808 continue;
809
810 if (wm8955->reg_cache[i] == wm8955_reg[i])
811 continue;
812
813 snd_soc_write(codec, i, wm8955->reg_cache[i]);
814 }
815
816 /* Enable VREF and VMID */
817 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
818 WM8955_VREF |
819 WM8955_VMIDSEL_MASK,
820 WM8955_VREF |
821 0x3 << WM8955_VREF_SHIFT);
822
823 /* Let VMID ramp */
824 msleep(500);
825
826 /* High resistance VROI to maintain outputs */
827 snd_soc_update_bits(codec,
828 WM8955_ADDITIONAL_CONTROL_3,
829 WM8955_VROI, WM8955_VROI);
830 }
831
832 /* Maintain VMID with 2*250k */
833 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
834 WM8955_VMIDSEL_MASK,
835 0x2 << WM8955_VMIDSEL_SHIFT);
836
837 /* Minimum bias current */
838 snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
839 WM8955_VSEL_MASK, 0);
840 break;
841
842 case SND_SOC_BIAS_OFF:
843 /* Low resistance VROI to help discharge */
844 snd_soc_update_bits(codec,
845 WM8955_ADDITIONAL_CONTROL_3,
846 WM8955_VROI, 0);
847
848 /* Turn off VMID and VREF */
849 snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
850 WM8955_VREF |
851 WM8955_VMIDSEL_MASK, 0);
852
853 regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies),
854 wm8955->supplies);
855 break;
856 }
857 codec->bias_level = level;
858 return 0;
859 }
860
861 #define WM8955_RATES SNDRV_PCM_RATE_8000_96000
862
863 #define WM8955_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
864 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
865
866 static struct snd_soc_dai_ops wm8955_dai_ops = {
867 .set_sysclk = wm8955_set_sysclk,
868 .set_fmt = wm8955_set_fmt,
869 .hw_params = wm8955_hw_params,
870 .digital_mute = wm8955_digital_mute,
871 };
872
873 struct snd_soc_dai wm8955_dai = {
874 .name = "WM8955",
875 .playback = {
876 .stream_name = "Playback",
877 .channels_min = 2,
878 .channels_max = 2,
879 .rates = WM8955_RATES,
880 .formats = WM8955_FORMATS,
881 },
882 .ops = &wm8955_dai_ops,
883 };
884 EXPORT_SYMBOL_GPL(wm8955_dai);
885
886 #ifdef CONFIG_PM
887 static int wm8955_suspend(struct platform_device *pdev, pm_message_t state)
888 {
889 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
890 struct snd_soc_codec *codec = socdev->card->codec;
891
892 wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF);
893
894 return 0;
895 }
896
897 static int wm8955_resume(struct platform_device *pdev)
898 {
899 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
900 struct snd_soc_codec *codec = socdev->card->codec;
901
902 wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
903
904 return 0;
905 }
906 #else
907 #define wm8955_suspend NULL
908 #define wm8955_resume NULL
909 #endif
910
911 static int wm8955_probe(struct platform_device *pdev)
912 {
913 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
914 struct snd_soc_codec *codec;
915 int ret = 0;
916
917 if (wm8955_codec == NULL) {
918 dev_err(&pdev->dev, "Codec device not registered\n");
919 return -ENODEV;
920 }
921
922 socdev->card->codec = wm8955_codec;
923 codec = wm8955_codec;
924
925 /* register pcms */
926 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
927 if (ret < 0) {
928 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
929 goto pcm_err;
930 }
931
932 wm8955_add_widgets(codec);
933
934 return ret;
935
936 pcm_err:
937 return ret;
938 }
939
940 static int wm8955_remove(struct platform_device *pdev)
941 {
942 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
943
944 snd_soc_free_pcms(socdev);
945 snd_soc_dapm_free(socdev);
946
947 return 0;
948 }
949
950 struct snd_soc_codec_device soc_codec_dev_wm8955 = {
951 .probe = wm8955_probe,
952 .remove = wm8955_remove,
953 .suspend = wm8955_suspend,
954 .resume = wm8955_resume,
955 };
956 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8955);
957
958 static int wm8955_register(struct wm8955_priv *wm8955,
959 enum snd_soc_control_type control)
960 {
961 int ret;
962 struct snd_soc_codec *codec = &wm8955->codec;
963 int i;
964
965 if (wm8955_codec) {
966 dev_err(codec->dev, "Another WM8955 is registered\n");
967 return -EINVAL;
968 }
969
970 mutex_init(&codec->mutex);
971 INIT_LIST_HEAD(&codec->dapm_widgets);
972 INIT_LIST_HEAD(&codec->dapm_paths);
973
974 snd_soc_codec_set_drvdata(codec, wm8955);
975 codec->name = "WM8955";
976 codec->owner = THIS_MODULE;
977 codec->bias_level = SND_SOC_BIAS_OFF;
978 codec->set_bias_level = wm8955_set_bias_level;
979 codec->dai = &wm8955_dai;
980 codec->num_dai = 1;
981 codec->reg_cache_size = WM8955_MAX_REGISTER;
982 codec->reg_cache = &wm8955->reg_cache;
983
984 memcpy(codec->reg_cache, wm8955_reg, sizeof(wm8955_reg));
985
986 ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
987 if (ret != 0) {
988 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
989 goto err;
990 }
991
992 for (i = 0; i < ARRAY_SIZE(wm8955->supplies); i++)
993 wm8955->supplies[i].supply = wm8955_supply_names[i];
994
995 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8955->supplies),
996 wm8955->supplies);
997 if (ret != 0) {
998 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
999 goto err;
1000 }
1001
1002 ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies),
1003 wm8955->supplies);
1004 if (ret != 0) {
1005 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
1006 goto err_get;
1007 }
1008
1009 ret = wm8955_reset(codec);
1010 if (ret < 0) {
1011 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
1012 goto err_enable;
1013 }
1014
1015 wm8955_dai.dev = codec->dev;
1016
1017 /* Change some default settings - latch VU and enable ZC */
1018 wm8955->reg_cache[WM8955_LEFT_DAC_VOLUME] |= WM8955_LDVU;
1019 wm8955->reg_cache[WM8955_RIGHT_DAC_VOLUME] |= WM8955_RDVU;
1020 wm8955->reg_cache[WM8955_LOUT1_VOLUME] |= WM8955_LO1VU | WM8955_LO1ZC;
1021 wm8955->reg_cache[WM8955_ROUT1_VOLUME] |= WM8955_RO1VU | WM8955_RO1ZC;
1022 wm8955->reg_cache[WM8955_LOUT2_VOLUME] |= WM8955_LO2VU | WM8955_LO2ZC;
1023 wm8955->reg_cache[WM8955_ROUT2_VOLUME] |= WM8955_RO2VU | WM8955_RO2ZC;
1024 wm8955->reg_cache[WM8955_MONOOUT_VOLUME] |= WM8955_MOZC;
1025
1026 /* Also enable adaptive bass boost by default */
1027 wm8955->reg_cache[WM8955_BASS_CONTROL] |= WM8955_BB;
1028
1029 /* Set platform data values */
1030 if (wm8955->pdata) {
1031 if (wm8955->pdata->out2_speaker)
1032 wm8955->reg_cache[WM8955_ADDITIONAL_CONTROL_2]
1033 |= WM8955_ROUT2INV;
1034
1035 if (wm8955->pdata->monoin_diff)
1036 wm8955->reg_cache[WM8955_MONO_OUT_MIX_1]
1037 |= WM8955_DMEN;
1038 }
1039
1040 wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
1041
1042 /* Bias level configuration will have done an extra enable */
1043 regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
1044
1045 wm8955_codec = codec;
1046
1047 ret = snd_soc_register_codec(codec);
1048 if (ret != 0) {
1049 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
1050 return ret;
1051 }
1052
1053 ret = snd_soc_register_dai(&wm8955_dai);
1054 if (ret != 0) {
1055 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
1056 snd_soc_unregister_codec(codec);
1057 return ret;
1058 }
1059
1060 return 0;
1061
1062 err_enable:
1063 regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
1064 err_get:
1065 regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
1066 err:
1067 kfree(wm8955);
1068 return ret;
1069 }
1070
1071 static void wm8955_unregister(struct wm8955_priv *wm8955)
1072 {
1073 wm8955_set_bias_level(&wm8955->codec, SND_SOC_BIAS_OFF);
1074 regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
1075 snd_soc_unregister_dai(&wm8955_dai);
1076 snd_soc_unregister_codec(&wm8955->codec);
1077 kfree(wm8955);
1078 wm8955_codec = NULL;
1079 }
1080
1081 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1082 static __devinit int wm8955_i2c_probe(struct i2c_client *i2c,
1083 const struct i2c_device_id *id)
1084 {
1085 struct wm8955_priv *wm8955;
1086 struct snd_soc_codec *codec;
1087
1088 wm8955 = kzalloc(sizeof(struct wm8955_priv), GFP_KERNEL);
1089 if (wm8955 == NULL)
1090 return -ENOMEM;
1091
1092 codec = &wm8955->codec;
1093 codec->hw_write = (hw_write_t)i2c_master_send;
1094
1095 i2c_set_clientdata(i2c, wm8955);
1096 codec->control_data = i2c;
1097 wm8955->pdata = i2c->dev.platform_data;
1098
1099 codec->dev = &i2c->dev;
1100
1101 return wm8955_register(wm8955, SND_SOC_I2C);
1102 }
1103
1104 static __devexit int wm8955_i2c_remove(struct i2c_client *client)
1105 {
1106 struct wm8955_priv *wm8955 = i2c_get_clientdata(client);
1107 wm8955_unregister(wm8955);
1108 return 0;
1109 }
1110
1111 static const struct i2c_device_id wm8955_i2c_id[] = {
1112 { "wm8955", 0 },
1113 { }
1114 };
1115 MODULE_DEVICE_TABLE(i2c, wm8955_i2c_id);
1116
1117 static struct i2c_driver wm8955_i2c_driver = {
1118 .driver = {
1119 .name = "wm8955",
1120 .owner = THIS_MODULE,
1121 },
1122 .probe = wm8955_i2c_probe,
1123 .remove = __devexit_p(wm8955_i2c_remove),
1124 .id_table = wm8955_i2c_id,
1125 };
1126 #endif
1127
1128 static int __init wm8955_modinit(void)
1129 {
1130 int ret;
1131 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1132 ret = i2c_add_driver(&wm8955_i2c_driver);
1133 if (ret != 0) {
1134 printk(KERN_ERR "Failed to register WM8955 I2C driver: %d\n",
1135 ret);
1136 }
1137 #endif
1138 return 0;
1139 }
1140 module_init(wm8955_modinit);
1141
1142 static void __exit wm8955_exit(void)
1143 {
1144 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
1145 i2c_del_driver(&wm8955_i2c_driver);
1146 #endif
1147 }
1148 module_exit(wm8955_exit);
1149
1150 MODULE_DESCRIPTION("ASoC WM8955 driver");
1151 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1152 MODULE_LICENSE("GPL");
Linux with added FPC-III support