1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * wm8974.c -- WM8974 ALSA Soc Audio driver
4 *
5 * Copyright 2006-2009 Wolfson Microelectronics PLC.
6 *
7 * Author: Liam Girdwood <Liam.Girdwood@wolfsonmicro.com>
8 */
9
10 #include <linux/clk.h>
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/delay.h>
15 #include <linux/pm.h>
16 #include <linux/i2c.h>
17 #include <linux/regmap.h>
18 #include <linux/slab.h>
19 #include <sound/core.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/soc.h>
23 #include <sound/initval.h>
24 #include <sound/tlv.h>
25
26 #include "wm8974.h"
27
28 struct wm8974_priv {
29 unsigned int mclk;
30 unsigned int fs;
31 struct clk *mclk_in;
32 };
33
34 static const struct reg_default wm8974_reg_defaults[] = {
35 { 0, 0x0000 }, { 1, 0x0000 }, { 2, 0x0000 }, { 3, 0x0000 },
36 { 4, 0x0050 }, { 5, 0x0000 }, { 6, 0x0140 }, { 7, 0x0000 },
37 { 8, 0x0000 }, { 9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
38 { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
39 { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
40 { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
41 { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
42 { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
43 { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
44 { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
45 { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
46 { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
47 { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
48 { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
49 { 56, 0x0000 },
50 };
51
52 #define WM8974_POWER1_BIASEN 0x08
53 #define WM8974_POWER1_BUFIOEN 0x04
54
55 #define wm8974_reset(c) snd_soc_component_write(c, WM8974_RESET, 0)
56
57 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
58 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
59 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
60 static const char *wm8974_bw[] = {"Narrow", "Wide" };
61 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
62 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
63 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
64 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
65 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
66 static const char *wm8974_alc[] = {"ALC", "Limiter" };
67
68 static const struct soc_enum wm8974_enum[] = {
69 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
70 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
71 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
72 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
73
74 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
75 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
76 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
77 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
78
79 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
80 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
81 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
82 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
83
84 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
85 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
86 };
87
88 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
89
90 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
91 WM8974_INPUT, 3, wm8974_auxmode_text);
92
93 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
94 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
95 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
96 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
97
98 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
99
100 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
101
102 SOC_ENUM("DAC Companding", wm8974_enum[1]),
103 SOC_ENUM("ADC Companding", wm8974_enum[0]),
104
105 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
106 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
107
108 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
109
110 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
111 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
112 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
113
114 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
115
116 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
117 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
118 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
119
120 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
121 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
122 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
123
124 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
125 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
126 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
127
128 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
129 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
130 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
131
132 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
133 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
134 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
135
136 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
137 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
138 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
139
140 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
141 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
142
143 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
144 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
145 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
146
147 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
148 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
149 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
150
151 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
152 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
153 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
154
155 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
156 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
157
158 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
159 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
160
161 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
162 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
163 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
164
165 SOC_ENUM("Aux Mode", wm8974_auxmode),
166
167 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
168 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
169
170 /* DAC / ADC oversampling */
171 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
172 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
173 };
174
175 /* Speaker Output Mixer */
176 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
177 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
178 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
179 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
180 };
181
182 /* Mono Output Mixer */
183 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
184 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
185 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
186 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
187 };
188
189 /* Boost mixer */
190 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
191 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 1),
192 };
193
194 /* Input PGA */
195 static const struct snd_kcontrol_new wm8974_inpga[] = {
196 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
197 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
198 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
199 };
200
201 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
202 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
203 &wm8974_speaker_mixer_controls[0],
204 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
205 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
206 &wm8974_mono_mixer_controls[0],
207 ARRAY_SIZE(wm8974_mono_mixer_controls)),
208 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
209 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
210 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
211 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
212 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
213 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
214
215 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
216 ARRAY_SIZE(wm8974_inpga)),
217 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
218 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
219
220 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
221
222 SND_SOC_DAPM_INPUT("MICN"),
223 SND_SOC_DAPM_INPUT("MICP"),
224 SND_SOC_DAPM_INPUT("AUX"),
225 SND_SOC_DAPM_OUTPUT("MONOOUT"),
226 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
227 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
228 };
229
230 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
231 /* Mono output mixer */
232 {"Mono Mixer", "PCM Playback Switch", "DAC"},
233 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
234 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
235
236 /* Speaker output mixer */
237 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
238 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
239 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
240
241 /* Outputs */
242 {"Mono Out", NULL, "Mono Mixer"},
243 {"MONOOUT", NULL, "Mono Out"},
244 {"SpkN Out", NULL, "Speaker Mixer"},
245 {"SpkP Out", NULL, "Speaker Mixer"},
246 {"SPKOUTN", NULL, "SpkN Out"},
247 {"SPKOUTP", NULL, "SpkP Out"},
248
249 /* Boost Mixer */
250 {"ADC", NULL, "Boost Mixer"},
251 {"Boost Mixer", "Aux Switch", "Aux Input"},
252 {"Boost Mixer", NULL, "Input PGA"},
253 {"Boost Mixer", NULL, "MICP"},
254
255 /* Input PGA */
256 {"Input PGA", "Aux Switch", "Aux Input"},
257 {"Input PGA", "MicN Switch", "MICN"},
258 {"Input PGA", "MicP Switch", "MICP"},
259
260 /* Inputs */
261 {"Aux Input", NULL, "AUX"},
262 };
263
264 struct pll_ {
265 unsigned int pre_div:1;
266 unsigned int n:4;
267 unsigned int k;
268 };
269
270 /* The size in bits of the pll divide multiplied by 10
271 * to allow rounding later */
272 #define FIXED_PLL_SIZE ((1 << 24) * 10)
273
pll_factors(struct pll_ * pll_div,unsigned int target,unsigned int source)274 static void pll_factors(struct pll_ *pll_div,
275 unsigned int target, unsigned int source)
276 {
277 unsigned long long Kpart;
278 unsigned int K, Ndiv, Nmod;
279
280 /* There is a fixed divide by 4 in the output path */
281 target *= 4;
282
283 Ndiv = target / source;
284 if (Ndiv < 6) {
285 source /= 2;
286 pll_div->pre_div = 1;
287 Ndiv = target / source;
288 } else
289 pll_div->pre_div = 0;
290
291 if ((Ndiv < 6) || (Ndiv > 12))
292 printk(KERN_WARNING
293 "WM8974 N value %u outwith recommended range!\n",
294 Ndiv);
295
296 pll_div->n = Ndiv;
297 Nmod = target % source;
298 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
299
300 do_div(Kpart, source);
301
302 K = Kpart & 0xFFFFFFFF;
303
304 /* Check if we need to round */
305 if ((K % 10) >= 5)
306 K += 5;
307
308 /* Move down to proper range now rounding is done */
309 K /= 10;
310
311 pll_div->k = K;
312 }
313
wm8974_set_dai_pll(struct snd_soc_dai * codec_dai,int pll_id,int source,unsigned int freq_in,unsigned int freq_out)314 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
315 int source, unsigned int freq_in, unsigned int freq_out)
316 {
317 struct snd_soc_component *component = codec_dai->component;
318 struct pll_ pll_div;
319 u16 reg;
320
321 if (freq_in == 0 || freq_out == 0) {
322 /* Clock CODEC directly from MCLK */
323 reg = snd_soc_component_read(component, WM8974_CLOCK);
324 snd_soc_component_write(component, WM8974_CLOCK, reg & 0x0ff);
325
326 /* Turn off PLL */
327 reg = snd_soc_component_read(component, WM8974_POWER1);
328 snd_soc_component_write(component, WM8974_POWER1, reg & 0x1df);
329 return 0;
330 }
331
332 pll_factors(&pll_div, freq_out, freq_in);
333
334 snd_soc_component_write(component, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
335 snd_soc_component_write(component, WM8974_PLLK1, pll_div.k >> 18);
336 snd_soc_component_write(component, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
337 snd_soc_component_write(component, WM8974_PLLK3, pll_div.k & 0x1ff);
338 reg = snd_soc_component_read(component, WM8974_POWER1);
339 snd_soc_component_write(component, WM8974_POWER1, reg | 0x020);
340
341 /* Run CODEC from PLL instead of MCLK */
342 reg = snd_soc_component_read(component, WM8974_CLOCK);
343 snd_soc_component_write(component, WM8974_CLOCK, reg | 0x100);
344
345 return 0;
346 }
347
348 /*
349 * Configure WM8974 clock dividers.
350 */
wm8974_set_dai_clkdiv(struct snd_soc_dai * codec_dai,int div_id,int div)351 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
352 int div_id, int div)
353 {
354 struct snd_soc_component *component = codec_dai->component;
355 u16 reg;
356
357 switch (div_id) {
358 case WM8974_OPCLKDIV:
359 reg = snd_soc_component_read(component, WM8974_GPIO) & 0x1cf;
360 snd_soc_component_write(component, WM8974_GPIO, reg | div);
361 break;
362 case WM8974_MCLKDIV:
363 reg = snd_soc_component_read(component, WM8974_CLOCK) & 0x11f;
364 snd_soc_component_write(component, WM8974_CLOCK, reg | div);
365 break;
366 case WM8974_BCLKDIV:
367 reg = snd_soc_component_read(component, WM8974_CLOCK) & 0x1e3;
368 snd_soc_component_write(component, WM8974_CLOCK, reg | div);
369 break;
370 default:
371 return -EINVAL;
372 }
373
374 return 0;
375 }
376
wm8974_get_mclkdiv(unsigned int f_in,unsigned int f_out,int * mclkdiv)377 static unsigned int wm8974_get_mclkdiv(unsigned int f_in, unsigned int f_out,
378 int *mclkdiv)
379 {
380 unsigned int ratio = 2 * f_in / f_out;
381
382 if (ratio <= 2) {
383 *mclkdiv = WM8974_MCLKDIV_1;
384 ratio = 2;
385 } else if (ratio == 3) {
386 *mclkdiv = WM8974_MCLKDIV_1_5;
387 } else if (ratio == 4) {
388 *mclkdiv = WM8974_MCLKDIV_2;
389 } else if (ratio <= 6) {
390 *mclkdiv = WM8974_MCLKDIV_3;
391 ratio = 6;
392 } else if (ratio <= 8) {
393 *mclkdiv = WM8974_MCLKDIV_4;
394 ratio = 8;
395 } else if (ratio <= 12) {
396 *mclkdiv = WM8974_MCLKDIV_6;
397 ratio = 12;
398 } else if (ratio <= 16) {
399 *mclkdiv = WM8974_MCLKDIV_8;
400 ratio = 16;
401 } else {
402 *mclkdiv = WM8974_MCLKDIV_12;
403 ratio = 24;
404 }
405
406 return f_out * ratio / 2;
407 }
408
wm8974_update_clocks(struct snd_soc_dai * dai)409 static int wm8974_update_clocks(struct snd_soc_dai *dai)
410 {
411 struct snd_soc_component *component = dai->component;
412 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
413 unsigned int fs256;
414 unsigned int fpll = 0;
415 unsigned int f;
416 int mclkdiv;
417
418 if (!priv->mclk || !priv->fs)
419 return 0;
420
421 fs256 = 256 * priv->fs;
422
423 f = wm8974_get_mclkdiv(priv->mclk, fs256, &mclkdiv);
424
425 if (f != priv->mclk) {
426 /* The PLL performs best around 90MHz */
427 fpll = wm8974_get_mclkdiv(22500000, fs256, &mclkdiv);
428 }
429
430 wm8974_set_dai_pll(dai, 0, 0, priv->mclk, fpll);
431 wm8974_set_dai_clkdiv(dai, WM8974_MCLKDIV, mclkdiv);
432
433 return 0;
434 }
435
wm8974_set_dai_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)436 static int wm8974_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
437 unsigned int freq, int dir)
438 {
439 struct snd_soc_component *component = dai->component;
440 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
441
442 if (dir != SND_SOC_CLOCK_IN)
443 return -EINVAL;
444
445 priv->mclk = freq;
446
447 return wm8974_update_clocks(dai);
448 }
449
wm8974_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)450 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
451 unsigned int fmt)
452 {
453 struct snd_soc_component *component = codec_dai->component;
454 u16 iface = 0;
455 u16 clk = snd_soc_component_read(component, WM8974_CLOCK) & 0x1fe;
456
457 /* set master/slave audio interface */
458 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
459 case SND_SOC_DAIFMT_CBM_CFM:
460 clk |= 0x0001;
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 |= 0x0010;
472 break;
473 case SND_SOC_DAIFMT_RIGHT_J:
474 break;
475 case SND_SOC_DAIFMT_LEFT_J:
476 iface |= 0x0008;
477 break;
478 case SND_SOC_DAIFMT_DSP_A:
479 if ((fmt & SND_SOC_DAIFMT_INV_MASK) == SND_SOC_DAIFMT_IB_IF ||
480 (fmt & SND_SOC_DAIFMT_INV_MASK) == SND_SOC_DAIFMT_NB_IF) {
481 return -EINVAL;
482 }
483 iface |= 0x00018;
484 break;
485 default:
486 return -EINVAL;
487 }
488
489 /* clock inversion */
490 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
491 case SND_SOC_DAIFMT_NB_NF:
492 break;
493 case SND_SOC_DAIFMT_IB_IF:
494 iface |= 0x0180;
495 break;
496 case SND_SOC_DAIFMT_IB_NF:
497 iface |= 0x0100;
498 break;
499 case SND_SOC_DAIFMT_NB_IF:
500 iface |= 0x0080;
501 break;
502 default:
503 return -EINVAL;
504 }
505
506 snd_soc_component_write(component, WM8974_IFACE, iface);
507 snd_soc_component_write(component, WM8974_CLOCK, clk);
508 return 0;
509 }
510
wm8974_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)511 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
512 struct snd_pcm_hw_params *params,
513 struct snd_soc_dai *dai)
514 {
515 struct snd_soc_component *component = dai->component;
516 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
517 u16 iface = snd_soc_component_read(component, WM8974_IFACE) & 0x19f;
518 u16 adn = snd_soc_component_read(component, WM8974_ADD) & 0x1f1;
519 int err;
520
521 priv->fs = params_rate(params);
522 err = wm8974_update_clocks(dai);
523 if (err)
524 return err;
525
526 /* bit size */
527 switch (params_width(params)) {
528 case 16:
529 break;
530 case 20:
531 iface |= 0x0020;
532 break;
533 case 24:
534 iface |= 0x0040;
535 break;
536 case 32:
537 iface |= 0x0060;
538 break;
539 }
540
541 /* filter coefficient */
542 switch (params_rate(params)) {
543 case 8000:
544 adn |= 0x5 << 1;
545 break;
546 case 11025:
547 adn |= 0x4 << 1;
548 break;
549 case 16000:
550 adn |= 0x3 << 1;
551 break;
552 case 22050:
553 adn |= 0x2 << 1;
554 break;
555 case 32000:
556 adn |= 0x1 << 1;
557 break;
558 case 44100:
559 case 48000:
560 break;
561 }
562
563 snd_soc_component_write(component, WM8974_IFACE, iface);
564 snd_soc_component_write(component, WM8974_ADD, adn);
565 return 0;
566 }
567
wm8974_mute(struct snd_soc_dai * dai,int mute,int direction)568 static int wm8974_mute(struct snd_soc_dai *dai, int mute, int direction)
569 {
570 struct snd_soc_component *component = dai->component;
571 u16 mute_reg = snd_soc_component_read(component, WM8974_DAC) & 0xffbf;
572
573 if (mute)
574 snd_soc_component_write(component, WM8974_DAC, mute_reg | 0x40);
575 else
576 snd_soc_component_write(component, WM8974_DAC, mute_reg);
577 return 0;
578 }
579
580 /* liam need to make this lower power with dapm */
wm8974_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)581 static int wm8974_set_bias_level(struct snd_soc_component *component,
582 enum snd_soc_bias_level level)
583 {
584 u16 power1 = snd_soc_component_read(component, WM8974_POWER1) & ~0x3;
585
586 switch (level) {
587 case SND_SOC_BIAS_ON:
588 case SND_SOC_BIAS_PREPARE:
589 power1 |= 0x1; /* VMID 50k */
590 snd_soc_component_write(component, WM8974_POWER1, power1);
591 break;
592
593 case SND_SOC_BIAS_STANDBY:
594 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
595
596 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
597 regcache_sync(dev_get_regmap(component->dev, NULL));
598
599 /* Initial cap charge at VMID 5k */
600 snd_soc_component_write(component, WM8974_POWER1, power1 | 0x3);
601 mdelay(100);
602 }
603
604 power1 |= 0x2; /* VMID 500k */
605 snd_soc_component_write(component, WM8974_POWER1, power1);
606 break;
607
608 case SND_SOC_BIAS_OFF:
609 snd_soc_component_write(component, WM8974_POWER1, 0);
610 snd_soc_component_write(component, WM8974_POWER2, 0);
611 snd_soc_component_write(component, WM8974_POWER3, 0);
612 break;
613 }
614
615 return 0;
616 }
617
wm8974_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)618 static int wm8974_startup(struct snd_pcm_substream *substream,
619 struct snd_soc_dai *dai)
620 {
621 struct snd_soc_component *component = dai->component;
622 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
623 u16 power1 = snd_soc_component_read(component, WM8974_POWER1);
624
625 clk_prepare_enable(priv->mclk_in);
626 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
627 power1 |= 0x10;
628 snd_soc_component_write(component, WM8974_POWER1, power1);
629 }
630
631 return 0;
632 }
633
wm8974_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)634 static void wm8974_shutdown(struct snd_pcm_substream *substream,
635 struct snd_soc_dai *dai)
636 {
637 struct snd_soc_component *component = dai->component;
638 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
639 u16 power1 = snd_soc_component_read(component, WM8974_POWER1);
640
641 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
642 power1 &= ~0x10;
643 snd_soc_component_write(component, WM8974_POWER1, power1);
644 }
645 clk_disable_unprepare(priv->mclk_in);
646 }
647
648 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
649
650 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
651 SNDRV_PCM_FMTBIT_S24_LE)
652
653 static const struct snd_soc_dai_ops wm8974_ops = {
654 .hw_params = wm8974_pcm_hw_params,
655 .mute_stream = wm8974_mute,
656 .set_fmt = wm8974_set_dai_fmt,
657 .set_clkdiv = wm8974_set_dai_clkdiv,
658 .set_pll = wm8974_set_dai_pll,
659 .set_sysclk = wm8974_set_dai_sysclk,
660 .startup = wm8974_startup,
661 .shutdown = wm8974_shutdown,
662 .no_capture_mute = 1,
663 };
664
665 static struct snd_soc_dai_driver wm8974_dai = {
666 .name = "wm8974-hifi",
667 .playback = {
668 .stream_name = "Playback",
669 .channels_min = 1,
670 .channels_max = 2, /* Only 1 channel of data */
671 .rates = WM8974_RATES,
672 .formats = WM8974_FORMATS,},
673 .capture = {
674 .stream_name = "Capture",
675 .channels_min = 1,
676 .channels_max = 2, /* Only 1 channel of data */
677 .rates = WM8974_RATES,
678 .formats = WM8974_FORMATS,},
679 .ops = &wm8974_ops,
680 .symmetric_rates = 1,
681 };
682
683 static const struct regmap_config wm8974_regmap = {
684 .reg_bits = 7,
685 .val_bits = 9,
686
687 .max_register = WM8974_MONOMIX,
688 .reg_defaults = wm8974_reg_defaults,
689 .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
690 .cache_type = REGCACHE_FLAT,
691 };
692
wm8974_probe(struct snd_soc_component * component)693 static int wm8974_probe(struct snd_soc_component *component)
694 {
695 int ret = 0;
696
697 ret = wm8974_reset(component);
698 if (ret < 0) {
699 dev_err(component->dev, "Failed to issue reset\n");
700 return ret;
701 }
702
703 return 0;
704 }
705
706 static const struct snd_soc_component_driver soc_component_dev_wm8974 = {
707 .probe = wm8974_probe,
708 .set_bias_level = wm8974_set_bias_level,
709 .controls = wm8974_snd_controls,
710 .num_controls = ARRAY_SIZE(wm8974_snd_controls),
711 .dapm_widgets = wm8974_dapm_widgets,
712 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
713 .dapm_routes = wm8974_dapm_routes,
714 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
715 .suspend_bias_off = 1,
716 .idle_bias_on = 1,
717 .use_pmdown_time = 1,
718 .endianness = 1,
719 .non_legacy_dai_naming = 1,
720 };
721
wm8974_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)722 static int wm8974_i2c_probe(struct i2c_client *i2c,
723 const struct i2c_device_id *id)
724 {
725 struct wm8974_priv *priv;
726 struct regmap *regmap;
727 int ret;
728
729 priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
730 if (!priv)
731 return -ENOMEM;
732
733 i2c_set_clientdata(i2c, priv);
734
735 regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
736 if (IS_ERR(regmap))
737 return PTR_ERR(regmap);
738
739 priv->mclk_in = devm_clk_get(&i2c->dev, "mclk");
740 if (IS_ERR(priv->mclk_in))
741 return PTR_ERR(priv->mclk_in);
742
743 ret = devm_snd_soc_register_component(&i2c->dev,
744 &soc_component_dev_wm8974, &wm8974_dai, 1);
745
746 return ret;
747 }
748
749 static const struct i2c_device_id wm8974_i2c_id[] = {
750 { "wm8974", 0 },
751 { }
752 };
753 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
754
755 static const struct of_device_id wm8974_of_match[] = {
756 { .compatible = "wlf,wm8974", },
757 { }
758 };
759 MODULE_DEVICE_TABLE(of, wm8974_of_match);
760
761 static struct i2c_driver wm8974_i2c_driver = {
762 .driver = {
763 .name = "wm8974",
764 .of_match_table = wm8974_of_match,
765 },
766 .probe = wm8974_i2c_probe,
767 .id_table = wm8974_i2c_id,
768 };
769
770 module_i2c_driver(wm8974_i2c_driver);
771
772 MODULE_DESCRIPTION("ASoC WM8974 driver");
773 MODULE_AUTHOR("Liam Girdwood");
774 MODULE_LICENSE("GPL");
775