xref: /openbmc/linux/sound/soc/codecs/wm8971.c (revision b34e08d5)
1 /*
2  * wm8971.c  --  WM8971 ALSA SoC Audio driver
3  *
4  * Copyright 2005 Lab126, Inc.
5  *
6  * Author: Kenneth Kiraly <kiraly@lab126.com>
7  *
8  * Based on wm8753.c by Liam Girdwood
9  *
10  *  This program is free software; you can redistribute  it and/or modify it
11  *  under  the terms of  the GNU General  Public License as published by the
12  *  Free Software Foundation;  either version 2 of the  License, or (at your
13  *  option) any later version.
14  */
15 
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
20 #include <linux/pm.h>
21 #include <linux/i2c.h>
22 #include <linux/regmap.h>
23 #include <linux/slab.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/soc.h>
28 #include <sound/initval.h>
29 
30 #include "wm8971.h"
31 
32 #define	WM8971_REG_COUNT		43
33 
34 static struct workqueue_struct *wm8971_workq = NULL;
35 
36 /* codec private data */
37 struct wm8971_priv {
38 	unsigned int sysclk;
39 };
40 
41 /*
42  * wm8971 register cache
43  * We can't read the WM8971 register space when we
44  * are using 2 wire for device control, so we cache them instead.
45  */
46 static const struct reg_default wm8971_reg_defaults[] = {
47 	{  0, 0x0097 },
48 	{  1, 0x0097 },
49 	{  2, 0x0079 },
50 	{  3, 0x0079 },
51 	{  4, 0x0000 },
52 	{  5, 0x0008 },
53 	{  6, 0x0000 },
54 	{  7, 0x000a },
55 	{  8, 0x0000 },
56 	{  9, 0x0000 },
57 	{ 10, 0x00ff },
58 	{ 11, 0x00ff },
59 	{ 12, 0x000f },
60 	{ 13, 0x000f },
61 	{ 14, 0x0000 },
62 	{ 15, 0x0000 },
63 	{ 16, 0x0000 },
64 	{ 17, 0x007b },
65 	{ 18, 0x0000 },
66 	{ 19, 0x0032 },
67 	{ 20, 0x0000 },
68 	{ 21, 0x00c3 },
69 	{ 22, 0x00c3 },
70 	{ 23, 0x00c0 },
71 	{ 24, 0x0000 },
72 	{ 25, 0x0000 },
73 	{ 26, 0x0000 },
74 	{ 27, 0x0000 },
75 	{ 28, 0x0000 },
76 	{ 29, 0x0000 },
77 	{ 30, 0x0000 },
78 	{ 31, 0x0000 },
79 	{ 32, 0x0000 },
80 	{ 33, 0x0000 },
81 	{ 34, 0x0050 },
82 	{ 35, 0x0050 },
83 	{ 36, 0x0050 },
84 	{ 37, 0x0050 },
85 	{ 38, 0x0050 },
86 	{ 39, 0x0050 },
87 	{ 40, 0x0079 },
88 	{ 41, 0x0079 },
89 	{ 42, 0x0079 },
90 };
91 
92 #define wm8971_reset(c)	snd_soc_write(c, WM8971_RESET, 0)
93 
94 /* WM8971 Controls */
95 static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" };
96 static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz",
97 	"200Hz @ 48kHz" };
98 static const char *wm8971_treble[] = { "8kHz", "4kHz" };
99 static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" };
100 static const char *wm8971_ng_type[] = { "Constant PGA Gain",
101 	"Mute ADC Output" };
102 static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
103 static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)",
104 	"Mono (Right)", "Digital Mono"};
105 static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" };
106 static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA",
107 	"Differential"};
108 static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA",
109 	"Differential"};
110 static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"};
111 static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"};
112 static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert",
113 	"L + R Invert"};
114 
115 static const struct soc_enum wm8971_enum[] = {
116 	SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass),	/* 0 */
117 	SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter),
118 	SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble),
119 	SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func),
120 	SOC_ENUM_SINGLE(WM8971_NGATE, 1, 2, wm8971_ng_type),    /* 4 */
121 	SOC_ENUM_SINGLE(WM8971_ADCDAC, 1, 4, wm8971_deemp),
122 	SOC_ENUM_SINGLE(WM8971_ADCTL1, 4, 4, wm8971_mono_mux),
123 	SOC_ENUM_SINGLE(WM8971_ADCTL1, 1, 2, wm8971_dac_phase),
124 	SOC_ENUM_SINGLE(WM8971_LOUTM1, 0, 5, wm8971_lline_mux), /* 8 */
125 	SOC_ENUM_SINGLE(WM8971_ROUTM1, 0, 5, wm8971_rline_mux),
126 	SOC_ENUM_SINGLE(WM8971_LADCIN, 6, 4, wm8971_lpga_sel),
127 	SOC_ENUM_SINGLE(WM8971_RADCIN, 6, 4, wm8971_rpga_sel),
128 	SOC_ENUM_SINGLE(WM8971_ADCDAC, 5, 4, wm8971_adcpol),    /* 12 */
129 	SOC_ENUM_SINGLE(WM8971_ADCIN, 6, 4, wm8971_mono_mux),
130 };
131 
132 static const struct snd_kcontrol_new wm8971_snd_controls[] = {
133 	SOC_DOUBLE_R("Capture Volume", WM8971_LINVOL, WM8971_RINVOL, 0, 63, 0),
134 	SOC_DOUBLE_R("Capture ZC Switch", WM8971_LINVOL, WM8971_RINVOL,
135 		     6, 1, 0),
136 	SOC_DOUBLE_R("Capture Switch", WM8971_LINVOL, WM8971_RINVOL, 7, 1, 1),
137 
138 	SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8971_LOUT1V,
139 		WM8971_ROUT1V, 7, 1, 0),
140 	SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8971_LOUT2V,
141 		WM8971_ROUT2V, 7, 1, 0),
142 	SOC_SINGLE("Mono Playback ZC Switch", WM8971_MOUTV, 7, 1, 0),
143 
144 	SOC_DOUBLE_R("PCM Volume", WM8971_LDAC, WM8971_RDAC, 0, 255, 0),
145 
146 	SOC_DOUBLE_R("Bypass Left Playback Volume", WM8971_LOUTM1,
147 		WM8971_LOUTM2, 4, 7, 1),
148 	SOC_DOUBLE_R("Bypass Right Playback Volume", WM8971_ROUTM1,
149 		WM8971_ROUTM2, 4, 7, 1),
150 	SOC_DOUBLE_R("Bypass Mono Playback Volume", WM8971_MOUTM1,
151 		WM8971_MOUTM2, 4, 7, 1),
152 
153 	SOC_DOUBLE_R("Headphone Playback Volume", WM8971_LOUT1V,
154 		WM8971_ROUT1V, 0, 127, 0),
155 	SOC_DOUBLE_R("Speaker Playback Volume", WM8971_LOUT2V,
156 		WM8971_ROUT2V, 0, 127, 0),
157 
158 	SOC_ENUM("Bass Boost", wm8971_enum[0]),
159 	SOC_ENUM("Bass Filter", wm8971_enum[1]),
160 	SOC_SINGLE("Bass Volume", WM8971_BASS, 0, 7, 1),
161 
162 	SOC_SINGLE("Treble Volume", WM8971_TREBLE, 0, 7, 0),
163 	SOC_ENUM("Treble Cut-off", wm8971_enum[2]),
164 
165 	SOC_SINGLE("Capture Filter Switch", WM8971_ADCDAC, 0, 1, 1),
166 
167 	SOC_SINGLE("ALC Target Volume", WM8971_ALC1, 0, 7, 0),
168 	SOC_SINGLE("ALC Max Volume", WM8971_ALC1, 4, 7, 0),
169 
170 	SOC_SINGLE("ALC Capture Target Volume", WM8971_ALC1, 0, 7, 0),
171 	SOC_SINGLE("ALC Capture Max Volume", WM8971_ALC1, 4, 7, 0),
172 	SOC_ENUM("ALC Capture Function", wm8971_enum[3]),
173 	SOC_SINGLE("ALC Capture ZC Switch", WM8971_ALC2, 7, 1, 0),
174 	SOC_SINGLE("ALC Capture Hold Time", WM8971_ALC2, 0, 15, 0),
175 	SOC_SINGLE("ALC Capture Decay Time", WM8971_ALC3, 4, 15, 0),
176 	SOC_SINGLE("ALC Capture Attack Time", WM8971_ALC3, 0, 15, 0),
177 	SOC_SINGLE("ALC Capture NG Threshold", WM8971_NGATE, 3, 31, 0),
178 	SOC_ENUM("ALC Capture NG Type", wm8971_enum[4]),
179 	SOC_SINGLE("ALC Capture NG Switch", WM8971_NGATE, 0, 1, 0),
180 
181 	SOC_SINGLE("Capture 6dB Attenuate", WM8971_ADCDAC, 8, 1, 0),
182 	SOC_SINGLE("Playback 6dB Attenuate", WM8971_ADCDAC, 7, 1, 0),
183 
184 	SOC_ENUM("Playback De-emphasis", wm8971_enum[5]),
185 	SOC_ENUM("Playback Function", wm8971_enum[6]),
186 	SOC_ENUM("Playback Phase", wm8971_enum[7]),
187 
188 	SOC_DOUBLE_R("Mic Boost", WM8971_LADCIN, WM8971_RADCIN, 4, 3, 0),
189 };
190 
191 /*
192  * DAPM Controls
193  */
194 
195 /* Left Mixer */
196 static const struct snd_kcontrol_new wm8971_left_mixer_controls[] = {
197 SOC_DAPM_SINGLE("Playback Switch", WM8971_LOUTM1, 8, 1, 0),
198 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_LOUTM1, 7, 1, 0),
199 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_LOUTM2, 8, 1, 0),
200 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_LOUTM2, 7, 1, 0),
201 };
202 
203 /* Right Mixer */
204 static const struct snd_kcontrol_new wm8971_right_mixer_controls[] = {
205 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_ROUTM1, 8, 1, 0),
206 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_ROUTM1, 7, 1, 0),
207 SOC_DAPM_SINGLE("Playback Switch", WM8971_ROUTM2, 8, 1, 0),
208 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_ROUTM2, 7, 1, 0),
209 };
210 
211 /* Mono Mixer */
212 static const struct snd_kcontrol_new wm8971_mono_mixer_controls[] = {
213 SOC_DAPM_SINGLE("Left Playback Switch", WM8971_MOUTM1, 8, 1, 0),
214 SOC_DAPM_SINGLE("Left Bypass Switch", WM8971_MOUTM1, 7, 1, 0),
215 SOC_DAPM_SINGLE("Right Playback Switch", WM8971_MOUTM2, 8, 1, 0),
216 SOC_DAPM_SINGLE("Right Bypass Switch", WM8971_MOUTM2, 7, 1, 0),
217 };
218 
219 /* Left Line Mux */
220 static const struct snd_kcontrol_new wm8971_left_line_controls =
221 SOC_DAPM_ENUM("Route", wm8971_enum[8]);
222 
223 /* Right Line Mux */
224 static const struct snd_kcontrol_new wm8971_right_line_controls =
225 SOC_DAPM_ENUM("Route", wm8971_enum[9]);
226 
227 /* Left PGA Mux */
228 static const struct snd_kcontrol_new wm8971_left_pga_controls =
229 SOC_DAPM_ENUM("Route", wm8971_enum[10]);
230 
231 /* Right PGA Mux */
232 static const struct snd_kcontrol_new wm8971_right_pga_controls =
233 SOC_DAPM_ENUM("Route", wm8971_enum[11]);
234 
235 /* Mono ADC Mux */
236 static const struct snd_kcontrol_new wm8971_monomux_controls =
237 SOC_DAPM_ENUM("Route", wm8971_enum[13]);
238 
239 static const struct snd_soc_dapm_widget wm8971_dapm_widgets[] = {
240 	SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
241 		&wm8971_left_mixer_controls[0],
242 		ARRAY_SIZE(wm8971_left_mixer_controls)),
243 	SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
244 		&wm8971_right_mixer_controls[0],
245 		ARRAY_SIZE(wm8971_right_mixer_controls)),
246 	SND_SOC_DAPM_MIXER("Mono Mixer", WM8971_PWR2, 2, 0,
247 		&wm8971_mono_mixer_controls[0],
248 		ARRAY_SIZE(wm8971_mono_mixer_controls)),
249 
250 	SND_SOC_DAPM_PGA("Right Out 2", WM8971_PWR2, 3, 0, NULL, 0),
251 	SND_SOC_DAPM_PGA("Left Out 2", WM8971_PWR2, 4, 0, NULL, 0),
252 	SND_SOC_DAPM_PGA("Right Out 1", WM8971_PWR2, 5, 0, NULL, 0),
253 	SND_SOC_DAPM_PGA("Left Out 1", WM8971_PWR2, 6, 0, NULL, 0),
254 	SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8971_PWR2, 7, 0),
255 	SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8971_PWR2, 8, 0),
256 	SND_SOC_DAPM_PGA("Mono Out 1", WM8971_PWR2, 2, 0, NULL, 0),
257 
258 	SND_SOC_DAPM_SUPPLY("Mic Bias", WM8971_PWR1, 1, 0, NULL, 0),
259 	SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8971_PWR1, 2, 0),
260 	SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8971_PWR1, 3, 0),
261 
262 	SND_SOC_DAPM_MUX("Left PGA Mux", WM8971_PWR1, 5, 0,
263 		&wm8971_left_pga_controls),
264 	SND_SOC_DAPM_MUX("Right PGA Mux", WM8971_PWR1, 4, 0,
265 		&wm8971_right_pga_controls),
266 	SND_SOC_DAPM_MUX("Left Line Mux", SND_SOC_NOPM, 0, 0,
267 		&wm8971_left_line_controls),
268 	SND_SOC_DAPM_MUX("Right Line Mux", SND_SOC_NOPM, 0, 0,
269 		&wm8971_right_line_controls),
270 
271 	SND_SOC_DAPM_MUX("Left ADC Mux", SND_SOC_NOPM, 0, 0,
272 		&wm8971_monomux_controls),
273 	SND_SOC_DAPM_MUX("Right ADC Mux", SND_SOC_NOPM, 0, 0,
274 		&wm8971_monomux_controls),
275 
276 	SND_SOC_DAPM_OUTPUT("LOUT1"),
277 	SND_SOC_DAPM_OUTPUT("ROUT1"),
278 	SND_SOC_DAPM_OUTPUT("LOUT2"),
279 	SND_SOC_DAPM_OUTPUT("ROUT2"),
280 	SND_SOC_DAPM_OUTPUT("MONO"),
281 
282 	SND_SOC_DAPM_INPUT("LINPUT1"),
283 	SND_SOC_DAPM_INPUT("RINPUT1"),
284 	SND_SOC_DAPM_INPUT("MIC"),
285 };
286 
287 static const struct snd_soc_dapm_route wm8971_dapm_routes[] = {
288 	/* left mixer */
289 	{"Left Mixer", "Playback Switch", "Left DAC"},
290 	{"Left Mixer", "Left Bypass Switch", "Left Line Mux"},
291 	{"Left Mixer", "Right Playback Switch", "Right DAC"},
292 	{"Left Mixer", "Right Bypass Switch", "Right Line Mux"},
293 
294 	/* right mixer */
295 	{"Right Mixer", "Left Playback Switch", "Left DAC"},
296 	{"Right Mixer", "Left Bypass Switch", "Left Line Mux"},
297 	{"Right Mixer", "Playback Switch", "Right DAC"},
298 	{"Right Mixer", "Right Bypass Switch", "Right Line Mux"},
299 
300 	/* left out 1 */
301 	{"Left Out 1", NULL, "Left Mixer"},
302 	{"LOUT1", NULL, "Left Out 1"},
303 
304 	/* left out 2 */
305 	{"Left Out 2", NULL, "Left Mixer"},
306 	{"LOUT2", NULL, "Left Out 2"},
307 
308 	/* right out 1 */
309 	{"Right Out 1", NULL, "Right Mixer"},
310 	{"ROUT1", NULL, "Right Out 1"},
311 
312 	/* right out 2 */
313 	{"Right Out 2", NULL, "Right Mixer"},
314 	{"ROUT2", NULL, "Right Out 2"},
315 
316 	/* mono mixer */
317 	{"Mono Mixer", "Left Playback Switch", "Left DAC"},
318 	{"Mono Mixer", "Left Bypass Switch", "Left Line Mux"},
319 	{"Mono Mixer", "Right Playback Switch", "Right DAC"},
320 	{"Mono Mixer", "Right Bypass Switch", "Right Line Mux"},
321 
322 	/* mono out */
323 	{"Mono Out", NULL, "Mono Mixer"},
324 	{"MONO1", NULL, "Mono Out"},
325 
326 	/* Left Line Mux */
327 	{"Left Line Mux", "Line", "LINPUT1"},
328 	{"Left Line Mux", "PGA", "Left PGA Mux"},
329 	{"Left Line Mux", "Differential", "Differential Mux"},
330 
331 	/* Right Line Mux */
332 	{"Right Line Mux", "Line", "RINPUT1"},
333 	{"Right Line Mux", "Mic", "MIC"},
334 	{"Right Line Mux", "PGA", "Right PGA Mux"},
335 	{"Right Line Mux", "Differential", "Differential Mux"},
336 
337 	/* Left PGA Mux */
338 	{"Left PGA Mux", "Line", "LINPUT1"},
339 	{"Left PGA Mux", "Differential", "Differential Mux"},
340 
341 	/* Right PGA Mux */
342 	{"Right PGA Mux", "Line", "RINPUT1"},
343 	{"Right PGA Mux", "Differential", "Differential Mux"},
344 
345 	/* Differential Mux */
346 	{"Differential Mux", "Line", "LINPUT1"},
347 	{"Differential Mux", "Line", "RINPUT1"},
348 
349 	/* Left ADC Mux */
350 	{"Left ADC Mux", "Stereo", "Left PGA Mux"},
351 	{"Left ADC Mux", "Mono (Left)", "Left PGA Mux"},
352 	{"Left ADC Mux", "Digital Mono", "Left PGA Mux"},
353 
354 	/* Right ADC Mux */
355 	{"Right ADC Mux", "Stereo", "Right PGA Mux"},
356 	{"Right ADC Mux", "Mono (Right)", "Right PGA Mux"},
357 	{"Right ADC Mux", "Digital Mono", "Right PGA Mux"},
358 
359 	/* ADC */
360 	{"Left ADC", NULL, "Left ADC Mux"},
361 	{"Right ADC", NULL, "Right ADC Mux"},
362 };
363 
364 struct _coeff_div {
365 	u32 mclk;
366 	u32 rate;
367 	u16 fs;
368 	u8 sr:5;
369 	u8 usb:1;
370 };
371 
372 /* codec hifi mclk clock divider coefficients */
373 static const struct _coeff_div coeff_div[] = {
374 	/* 8k */
375 	{12288000, 8000, 1536, 0x6, 0x0},
376 	{11289600, 8000, 1408, 0x16, 0x0},
377 	{18432000, 8000, 2304, 0x7, 0x0},
378 	{16934400, 8000, 2112, 0x17, 0x0},
379 	{12000000, 8000, 1500, 0x6, 0x1},
380 
381 	/* 11.025k */
382 	{11289600, 11025, 1024, 0x18, 0x0},
383 	{16934400, 11025, 1536, 0x19, 0x0},
384 	{12000000, 11025, 1088, 0x19, 0x1},
385 
386 	/* 16k */
387 	{12288000, 16000, 768, 0xa, 0x0},
388 	{18432000, 16000, 1152, 0xb, 0x0},
389 	{12000000, 16000, 750, 0xa, 0x1},
390 
391 	/* 22.05k */
392 	{11289600, 22050, 512, 0x1a, 0x0},
393 	{16934400, 22050, 768, 0x1b, 0x0},
394 	{12000000, 22050, 544, 0x1b, 0x1},
395 
396 	/* 32k */
397 	{12288000, 32000, 384, 0xc, 0x0},
398 	{18432000, 32000, 576, 0xd, 0x0},
399 	{12000000, 32000, 375, 0xa, 0x1},
400 
401 	/* 44.1k */
402 	{11289600, 44100, 256, 0x10, 0x0},
403 	{16934400, 44100, 384, 0x11, 0x0},
404 	{12000000, 44100, 272, 0x11, 0x1},
405 
406 	/* 48k */
407 	{12288000, 48000, 256, 0x0, 0x0},
408 	{18432000, 48000, 384, 0x1, 0x0},
409 	{12000000, 48000, 250, 0x0, 0x1},
410 
411 	/* 88.2k */
412 	{11289600, 88200, 128, 0x1e, 0x0},
413 	{16934400, 88200, 192, 0x1f, 0x0},
414 	{12000000, 88200, 136, 0x1f, 0x1},
415 
416 	/* 96k */
417 	{12288000, 96000, 128, 0xe, 0x0},
418 	{18432000, 96000, 192, 0xf, 0x0},
419 	{12000000, 96000, 125, 0xe, 0x1},
420 };
421 
422 static int get_coeff(int mclk, int rate)
423 {
424 	int i;
425 
426 	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
427 		if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
428 			return i;
429 	}
430 	return -EINVAL;
431 }
432 
433 static int wm8971_set_dai_sysclk(struct snd_soc_dai *codec_dai,
434 		int clk_id, unsigned int freq, int dir)
435 {
436 	struct snd_soc_codec *codec = codec_dai->codec;
437 	struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
438 
439 	switch (freq) {
440 	case 11289600:
441 	case 12000000:
442 	case 12288000:
443 	case 16934400:
444 	case 18432000:
445 		wm8971->sysclk = freq;
446 		return 0;
447 	}
448 	return -EINVAL;
449 }
450 
451 static int wm8971_set_dai_fmt(struct snd_soc_dai *codec_dai,
452 		unsigned int fmt)
453 {
454 	struct snd_soc_codec *codec = codec_dai->codec;
455 	u16 iface = 0;
456 
457 	/* set master/slave audio interface */
458 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
459 	case SND_SOC_DAIFMT_CBM_CFM:
460 		iface = 0x0040;
461 		break;
462 	case SND_SOC_DAIFMT_CBS_CFS:
463 		break;
464 	default:
465 		return -EINVAL;
466 	}
467 
468 	/* interface format */
469 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
470 	case SND_SOC_DAIFMT_I2S:
471 		iface |= 0x0002;
472 		break;
473 	case SND_SOC_DAIFMT_RIGHT_J:
474 		break;
475 	case SND_SOC_DAIFMT_LEFT_J:
476 		iface |= 0x0001;
477 		break;
478 	case SND_SOC_DAIFMT_DSP_A:
479 		iface |= 0x0003;
480 		break;
481 	case SND_SOC_DAIFMT_DSP_B:
482 		iface |= 0x0013;
483 		break;
484 	default:
485 		return -EINVAL;
486 	}
487 
488 	/* clock inversion */
489 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
490 	case SND_SOC_DAIFMT_NB_NF:
491 		break;
492 	case SND_SOC_DAIFMT_IB_IF:
493 		iface |= 0x0090;
494 		break;
495 	case SND_SOC_DAIFMT_IB_NF:
496 		iface |= 0x0080;
497 		break;
498 	case SND_SOC_DAIFMT_NB_IF:
499 		iface |= 0x0010;
500 		break;
501 	default:
502 		return -EINVAL;
503 	}
504 
505 	snd_soc_write(codec, WM8971_IFACE, iface);
506 	return 0;
507 }
508 
509 static int wm8971_pcm_hw_params(struct snd_pcm_substream *substream,
510 	struct snd_pcm_hw_params *params,
511 	struct snd_soc_dai *dai)
512 {
513 	struct snd_soc_codec *codec = dai->codec;
514 	struct wm8971_priv *wm8971 = snd_soc_codec_get_drvdata(codec);
515 	u16 iface = snd_soc_read(codec, WM8971_IFACE) & 0x1f3;
516 	u16 srate = snd_soc_read(codec, WM8971_SRATE) & 0x1c0;
517 	int coeff = get_coeff(wm8971->sysclk, params_rate(params));
518 
519 	/* bit size */
520 	switch (params_format(params)) {
521 	case SNDRV_PCM_FORMAT_S16_LE:
522 		break;
523 	case SNDRV_PCM_FORMAT_S20_3LE:
524 		iface |= 0x0004;
525 		break;
526 	case SNDRV_PCM_FORMAT_S24_LE:
527 		iface |= 0x0008;
528 		break;
529 	case SNDRV_PCM_FORMAT_S32_LE:
530 		iface |= 0x000c;
531 		break;
532 	}
533 
534 	/* set iface & srate */
535 	snd_soc_write(codec, WM8971_IFACE, iface);
536 	if (coeff >= 0)
537 		snd_soc_write(codec, WM8971_SRATE, srate |
538 			(coeff_div[coeff].sr << 1) | coeff_div[coeff].usb);
539 
540 	return 0;
541 }
542 
543 static int wm8971_mute(struct snd_soc_dai *dai, int mute)
544 {
545 	struct snd_soc_codec *codec = dai->codec;
546 	u16 mute_reg = snd_soc_read(codec, WM8971_ADCDAC) & 0xfff7;
547 
548 	if (mute)
549 		snd_soc_write(codec, WM8971_ADCDAC, mute_reg | 0x8);
550 	else
551 		snd_soc_write(codec, WM8971_ADCDAC, mute_reg);
552 	return 0;
553 }
554 
555 static int wm8971_set_bias_level(struct snd_soc_codec *codec,
556 	enum snd_soc_bias_level level)
557 {
558 	u16 pwr_reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
559 
560 	switch (level) {
561 	case SND_SOC_BIAS_ON:
562 		/* set vmid to 50k and unmute dac */
563 		snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x00c1);
564 		break;
565 	case SND_SOC_BIAS_PREPARE:
566 		break;
567 	case SND_SOC_BIAS_STANDBY:
568 		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
569 			snd_soc_cache_sync(codec);
570 
571 		/* mute dac and set vmid to 500k, enable VREF */
572 		snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
573 		break;
574 	case SND_SOC_BIAS_OFF:
575 		snd_soc_write(codec, WM8971_PWR1, 0x0001);
576 		break;
577 	}
578 	codec->dapm.bias_level = level;
579 	return 0;
580 }
581 
582 #define WM8971_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
583 		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
584 		SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
585 
586 #define WM8971_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
587 	SNDRV_PCM_FMTBIT_S24_LE)
588 
589 static const struct snd_soc_dai_ops wm8971_dai_ops = {
590 	.hw_params	= wm8971_pcm_hw_params,
591 	.digital_mute	= wm8971_mute,
592 	.set_fmt	= wm8971_set_dai_fmt,
593 	.set_sysclk	= wm8971_set_dai_sysclk,
594 };
595 
596 static struct snd_soc_dai_driver wm8971_dai = {
597 	.name = "wm8971-hifi",
598 	.playback = {
599 		.stream_name = "Playback",
600 		.channels_min = 1,
601 		.channels_max = 2,
602 		.rates = WM8971_RATES,
603 		.formats = WM8971_FORMATS,},
604 	.capture = {
605 		.stream_name = "Capture",
606 		.channels_min = 1,
607 		.channels_max = 2,
608 		.rates = WM8971_RATES,
609 		.formats = WM8971_FORMATS,},
610 	.ops = &wm8971_dai_ops,
611 };
612 
613 static void wm8971_work(struct work_struct *work)
614 {
615 	struct snd_soc_dapm_context *dapm =
616 		container_of(work, struct snd_soc_dapm_context,
617 			     delayed_work.work);
618 	struct snd_soc_codec *codec = dapm->codec;
619 	wm8971_set_bias_level(codec, codec->dapm.bias_level);
620 }
621 
622 static int wm8971_suspend(struct snd_soc_codec *codec)
623 {
624 	wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
625 	return 0;
626 }
627 
628 static int wm8971_resume(struct snd_soc_codec *codec)
629 {
630 	u16 reg;
631 
632 	wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
633 
634 	/* charge wm8971 caps */
635 	if (codec->dapm.suspend_bias_level == SND_SOC_BIAS_ON) {
636 		reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
637 		snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
638 		codec->dapm.bias_level = SND_SOC_BIAS_ON;
639 		queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
640 			msecs_to_jiffies(1000));
641 	}
642 
643 	return 0;
644 }
645 
646 static int wm8971_probe(struct snd_soc_codec *codec)
647 {
648 	int ret = 0;
649 	u16 reg;
650 
651 	INIT_DELAYED_WORK(&codec->dapm.delayed_work, wm8971_work);
652 	wm8971_workq = create_workqueue("wm8971");
653 	if (wm8971_workq == NULL)
654 		return -ENOMEM;
655 
656 	wm8971_reset(codec);
657 
658 	/* charge output caps - set vmid to 5k for quick power up */
659 	reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
660 	snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
661 	codec->dapm.bias_level = SND_SOC_BIAS_STANDBY;
662 	queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
663 		msecs_to_jiffies(1000));
664 
665 	/* set the update bits */
666 	snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);
667 	snd_soc_update_bits(codec, WM8971_RDAC, 0x0100, 0x0100);
668 	snd_soc_update_bits(codec, WM8971_LOUT1V, 0x0100, 0x0100);
669 	snd_soc_update_bits(codec, WM8971_ROUT1V, 0x0100, 0x0100);
670 	snd_soc_update_bits(codec, WM8971_LOUT2V, 0x0100, 0x0100);
671 	snd_soc_update_bits(codec, WM8971_ROUT2V, 0x0100, 0x0100);
672 	snd_soc_update_bits(codec, WM8971_LINVOL, 0x0100, 0x0100);
673 	snd_soc_update_bits(codec, WM8971_RINVOL, 0x0100, 0x0100);
674 
675 	return ret;
676 }
677 
678 
679 /* power down chip */
680 static int wm8971_remove(struct snd_soc_codec *codec)
681 {
682 	wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
683 
684 	if (wm8971_workq)
685 		destroy_workqueue(wm8971_workq);
686 	return 0;
687 }
688 
689 static struct snd_soc_codec_driver soc_codec_dev_wm8971 = {
690 	.probe =	wm8971_probe,
691 	.remove =	wm8971_remove,
692 	.suspend =	wm8971_suspend,
693 	.resume =	wm8971_resume,
694 	.set_bias_level = wm8971_set_bias_level,
695 
696 	.controls = wm8971_snd_controls,
697 	.num_controls = ARRAY_SIZE(wm8971_snd_controls),
698 	.dapm_widgets = wm8971_dapm_widgets,
699 	.num_dapm_widgets = ARRAY_SIZE(wm8971_dapm_widgets),
700 	.dapm_routes = wm8971_dapm_routes,
701 	.num_dapm_routes = ARRAY_SIZE(wm8971_dapm_routes),
702 };
703 
704 static const struct regmap_config wm8971_regmap = {
705 	.reg_bits = 7,
706 	.val_bits = 9,
707 	.max_register = WM8971_MOUTV,
708 
709 	.reg_defaults = wm8971_reg_defaults,
710 	.num_reg_defaults = ARRAY_SIZE(wm8971_reg_defaults),
711 	.cache_type = REGCACHE_RBTREE,
712 };
713 
714 static int wm8971_i2c_probe(struct i2c_client *i2c,
715 			    const struct i2c_device_id *id)
716 {
717 	struct wm8971_priv *wm8971;
718 	struct regmap *regmap;
719 	int ret;
720 
721 	wm8971 = devm_kzalloc(&i2c->dev, sizeof(struct wm8971_priv),
722 			      GFP_KERNEL);
723 	if (wm8971 == NULL)
724 		return -ENOMEM;
725 
726 	regmap = devm_regmap_init_i2c(i2c, &wm8971_regmap);
727 	if (IS_ERR(regmap))
728 		return PTR_ERR(regmap);
729 
730 	i2c_set_clientdata(i2c, wm8971);
731 
732 	ret = snd_soc_register_codec(&i2c->dev,
733 			&soc_codec_dev_wm8971, &wm8971_dai, 1);
734 
735 	return ret;
736 }
737 
738 static int wm8971_i2c_remove(struct i2c_client *client)
739 {
740 	snd_soc_unregister_codec(&client->dev);
741 	return 0;
742 }
743 
744 static const struct i2c_device_id wm8971_i2c_id[] = {
745 	{ "wm8971", 0 },
746 	{ }
747 };
748 MODULE_DEVICE_TABLE(i2c, wm8971_i2c_id);
749 
750 static struct i2c_driver wm8971_i2c_driver = {
751 	.driver = {
752 		.name = "wm8971",
753 		.owner = THIS_MODULE,
754 	},
755 	.probe =    wm8971_i2c_probe,
756 	.remove =   wm8971_i2c_remove,
757 	.id_table = wm8971_i2c_id,
758 };
759 
760 module_i2c_driver(wm8971_i2c_driver);
761 
762 MODULE_DESCRIPTION("ASoC WM8971 driver");
763 MODULE_AUTHOR("Lab126");
764 MODULE_LICENSE("GPL");
765