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/module.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/delay.h>
14 #include <linux/pm.h>
15 #include <linux/i2c.h>
16 #include <linux/regmap.h>
17 #include <linux/slab.h>
18 #include <sound/core.h>
19 #include <sound/pcm.h>
20 #include <sound/pcm_params.h>
21 #include <sound/soc.h>
22 #include <sound/initval.h>
23 #include <sound/tlv.h>
24
25 #include "wm8974.h"
26
27 struct wm8974_priv {
28 unsigned int mclk;
29 unsigned int fs;
30 };
31
32 static const struct reg_default wm8974_reg_defaults[] = {
33 { 0, 0x0000 }, { 1, 0x0000 }, { 2, 0x0000 }, { 3, 0x0000 },
34 { 4, 0x0050 }, { 5, 0x0000 }, { 6, 0x0140 }, { 7, 0x0000 },
35 { 8, 0x0000 }, { 9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
36 { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
37 { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
38 { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
39 { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
40 { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
41 { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
42 { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
43 { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
44 { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
45 { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
46 { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
47 { 56, 0x0000 },
48 };
49
50 #define WM8974_POWER1_BIASEN 0x08
51 #define WM8974_POWER1_BUFIOEN 0x04
52
53 #define wm8974_reset(c) snd_soc_component_write(c, WM8974_RESET, 0)
54
55 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
56 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
57 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
58 static const char *wm8974_bw[] = {"Narrow", "Wide" };
59 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
60 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
61 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
62 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
63 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
64 static const char *wm8974_alc[] = {"ALC", "Limiter" };
65
66 static const struct soc_enum wm8974_enum[] = {
67 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
68 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
69 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
70 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
71
72 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
73 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
74 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
75 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
76
77 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
78 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
79 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
80 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
81
82 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
83 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
84 };
85
86 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
87
88 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
89 WM8974_INPUT, 3, wm8974_auxmode_text);
90
91 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
92 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
93 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
94 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
95
96 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
97
98 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
99
100 SOC_ENUM("DAC Companding", wm8974_enum[1]),
101 SOC_ENUM("ADC Companding", wm8974_enum[0]),
102
103 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
104 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
105
106 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
107
108 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
109 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
110 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
111
112 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
113
114 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
115 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
116 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
117
118 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
119 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
120 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
121
122 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
123 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
124 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
125
126 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
127 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
128 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
129
130 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
131 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
132 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
133
134 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
135 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
136 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
137
138 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
139 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
140
141 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
142 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
143 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
144
145 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
146 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
147 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
148
149 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
150 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
151 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
152
153 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
154 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
155
156 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
157 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
158
159 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
160 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
161 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
162
163 SOC_ENUM("Aux Mode", wm8974_auxmode),
164
165 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
166 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
167
168 /* DAC / ADC oversampling */
169 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
170 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
171 };
172
173 /* Speaker Output Mixer */
174 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
175 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
176 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
177 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
178 };
179
180 /* Mono Output Mixer */
181 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
182 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
183 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
184 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
185 };
186
187 /* Boost mixer */
188 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
189 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 1),
190 };
191
192 /* Input PGA */
193 static const struct snd_kcontrol_new wm8974_inpga[] = {
194 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
195 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
196 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
197 };
198
199 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
200 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
201 &wm8974_speaker_mixer_controls[0],
202 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
203 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
204 &wm8974_mono_mixer_controls[0],
205 ARRAY_SIZE(wm8974_mono_mixer_controls)),
206 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
207 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
208 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
209 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
210 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
211 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
212
213 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
214 ARRAY_SIZE(wm8974_inpga)),
215 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
216 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
217
218 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
219
220 SND_SOC_DAPM_INPUT("MICN"),
221 SND_SOC_DAPM_INPUT("MICP"),
222 SND_SOC_DAPM_INPUT("AUX"),
223 SND_SOC_DAPM_OUTPUT("MONOOUT"),
224 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
225 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
226 };
227
228 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
229 /* Mono output mixer */
230 {"Mono Mixer", "PCM Playback Switch", "DAC"},
231 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
232 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
233
234 /* Speaker output mixer */
235 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
236 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
237 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
238
239 /* Outputs */
240 {"Mono Out", NULL, "Mono Mixer"},
241 {"MONOOUT", NULL, "Mono Out"},
242 {"SpkN Out", NULL, "Speaker Mixer"},
243 {"SpkP Out", NULL, "Speaker Mixer"},
244 {"SPKOUTN", NULL, "SpkN Out"},
245 {"SPKOUTP", NULL, "SpkP Out"},
246
247 /* Boost Mixer */
248 {"ADC", NULL, "Boost Mixer"},
249 {"Boost Mixer", "Aux Switch", "Aux Input"},
250 {"Boost Mixer", NULL, "Input PGA"},
251 {"Boost Mixer", NULL, "MICP"},
252
253 /* Input PGA */
254 {"Input PGA", "Aux Switch", "Aux Input"},
255 {"Input PGA", "MicN Switch", "MICN"},
256 {"Input PGA", "MicP Switch", "MICP"},
257
258 /* Inputs */
259 {"Aux Input", NULL, "AUX"},
260 };
261
262 struct pll_ {
263 unsigned int pre_div:1;
264 unsigned int n:4;
265 unsigned int k;
266 };
267
268 /* The size in bits of the pll divide multiplied by 10
269 * to allow rounding later */
270 #define FIXED_PLL_SIZE ((1 << 24) * 10)
271
pll_factors(struct pll_ * pll_div,unsigned int target,unsigned int source)272 static void pll_factors(struct pll_ *pll_div,
273 unsigned int target, unsigned int source)
274 {
275 unsigned long long Kpart;
276 unsigned int K, Ndiv, Nmod;
277
278 /* There is a fixed divide by 4 in the output path */
279 target *= 4;
280
281 Ndiv = target / source;
282 if (Ndiv < 6) {
283 source /= 2;
284 pll_div->pre_div = 1;
285 Ndiv = target / source;
286 } else
287 pll_div->pre_div = 0;
288
289 if ((Ndiv < 6) || (Ndiv > 12))
290 printk(KERN_WARNING
291 "WM8974 N value %u outwith recommended range!\n",
292 Ndiv);
293
294 pll_div->n = Ndiv;
295 Nmod = target % source;
296 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
297
298 do_div(Kpart, source);
299
300 K = Kpart & 0xFFFFFFFF;
301
302 /* Check if we need to round */
303 if ((K % 10) >= 5)
304 K += 5;
305
306 /* Move down to proper range now rounding is done */
307 K /= 10;
308
309 pll_div->k = K;
310 }
311
wm8974_set_dai_pll(struct snd_soc_dai * codec_dai,int pll_id,int source,unsigned int freq_in,unsigned int freq_out)312 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
313 int source, unsigned int freq_in, unsigned int freq_out)
314 {
315 struct snd_soc_component *component = codec_dai->component;
316 struct pll_ pll_div;
317 u16 reg;
318
319 if (freq_in == 0 || freq_out == 0) {
320 /* Clock CODEC directly from MCLK */
321 reg = snd_soc_component_read(component, WM8974_CLOCK);
322 snd_soc_component_write(component, WM8974_CLOCK, reg & 0x0ff);
323
324 /* Turn off PLL */
325 reg = snd_soc_component_read(component, WM8974_POWER1);
326 snd_soc_component_write(component, WM8974_POWER1, reg & 0x1df);
327 return 0;
328 }
329
330 pll_factors(&pll_div, freq_out, freq_in);
331
332 snd_soc_component_write(component, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
333 snd_soc_component_write(component, WM8974_PLLK1, pll_div.k >> 18);
334 snd_soc_component_write(component, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
335 snd_soc_component_write(component, WM8974_PLLK3, pll_div.k & 0x1ff);
336 reg = snd_soc_component_read(component, WM8974_POWER1);
337 snd_soc_component_write(component, WM8974_POWER1, reg | 0x020);
338
339 /* Run CODEC from PLL instead of MCLK */
340 reg = snd_soc_component_read(component, WM8974_CLOCK);
341 snd_soc_component_write(component, WM8974_CLOCK, reg | 0x100);
342
343 return 0;
344 }
345
346 /*
347 * Configure WM8974 clock dividers.
348 */
wm8974_set_dai_clkdiv(struct snd_soc_dai * codec_dai,int div_id,int div)349 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
350 int div_id, int div)
351 {
352 struct snd_soc_component *component = codec_dai->component;
353 u16 reg;
354
355 switch (div_id) {
356 case WM8974_OPCLKDIV:
357 reg = snd_soc_component_read(component, WM8974_GPIO) & 0x1cf;
358 snd_soc_component_write(component, WM8974_GPIO, reg | div);
359 break;
360 case WM8974_MCLKDIV:
361 reg = snd_soc_component_read(component, WM8974_CLOCK) & 0x11f;
362 snd_soc_component_write(component, WM8974_CLOCK, reg | div);
363 break;
364 case WM8974_BCLKDIV:
365 reg = snd_soc_component_read(component, WM8974_CLOCK) & 0x1e3;
366 snd_soc_component_write(component, WM8974_CLOCK, reg | div);
367 break;
368 default:
369 return -EINVAL;
370 }
371
372 return 0;
373 }
374
wm8974_get_mclkdiv(unsigned int f_in,unsigned int f_out,int * mclkdiv)375 static unsigned int wm8974_get_mclkdiv(unsigned int f_in, unsigned int f_out,
376 int *mclkdiv)
377 {
378 unsigned int ratio = 2 * f_in / f_out;
379
380 if (ratio <= 2) {
381 *mclkdiv = WM8974_MCLKDIV_1;
382 ratio = 2;
383 } else if (ratio == 3) {
384 *mclkdiv = WM8974_MCLKDIV_1_5;
385 } else if (ratio == 4) {
386 *mclkdiv = WM8974_MCLKDIV_2;
387 } else if (ratio <= 6) {
388 *mclkdiv = WM8974_MCLKDIV_3;
389 ratio = 6;
390 } else if (ratio <= 8) {
391 *mclkdiv = WM8974_MCLKDIV_4;
392 ratio = 8;
393 } else if (ratio <= 12) {
394 *mclkdiv = WM8974_MCLKDIV_6;
395 ratio = 12;
396 } else if (ratio <= 16) {
397 *mclkdiv = WM8974_MCLKDIV_8;
398 ratio = 16;
399 } else {
400 *mclkdiv = WM8974_MCLKDIV_12;
401 ratio = 24;
402 }
403
404 return f_out * ratio / 2;
405 }
406
wm8974_update_clocks(struct snd_soc_dai * dai)407 static int wm8974_update_clocks(struct snd_soc_dai *dai)
408 {
409 struct snd_soc_component *component = dai->component;
410 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
411 unsigned int fs256;
412 unsigned int fpll = 0;
413 unsigned int f;
414 int mclkdiv;
415
416 if (!priv->mclk || !priv->fs)
417 return 0;
418
419 fs256 = 256 * priv->fs;
420
421 f = wm8974_get_mclkdiv(priv->mclk, fs256, &mclkdiv);
422
423 if (f != priv->mclk) {
424 /* The PLL performs best around 90MHz */
425 fpll = wm8974_get_mclkdiv(22500000, fs256, &mclkdiv);
426 }
427
428 wm8974_set_dai_pll(dai, 0, 0, priv->mclk, fpll);
429 wm8974_set_dai_clkdiv(dai, WM8974_MCLKDIV, mclkdiv);
430
431 return 0;
432 }
433
wm8974_set_dai_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)434 static int wm8974_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
435 unsigned int freq, int dir)
436 {
437 struct snd_soc_component *component = dai->component;
438 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
439
440 if (dir != SND_SOC_CLOCK_IN)
441 return -EINVAL;
442
443 priv->mclk = freq;
444
445 return wm8974_update_clocks(dai);
446 }
447
wm8974_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)448 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
449 unsigned int fmt)
450 {
451 struct snd_soc_component *component = codec_dai->component;
452 u16 iface = 0;
453 u16 clk = snd_soc_component_read(component, WM8974_CLOCK) & 0x1fe;
454
455 /* set master/slave audio interface */
456 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
457 case SND_SOC_DAIFMT_CBM_CFM:
458 clk |= 0x0001;
459 break;
460 case SND_SOC_DAIFMT_CBS_CFS:
461 break;
462 default:
463 return -EINVAL;
464 }
465
466 /* interface format */
467 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
468 case SND_SOC_DAIFMT_I2S:
469 iface |= 0x0010;
470 break;
471 case SND_SOC_DAIFMT_RIGHT_J:
472 break;
473 case SND_SOC_DAIFMT_LEFT_J:
474 iface |= 0x0008;
475 break;
476 case SND_SOC_DAIFMT_DSP_A:
477 if ((fmt & SND_SOC_DAIFMT_INV_MASK) == SND_SOC_DAIFMT_IB_IF ||
478 (fmt & SND_SOC_DAIFMT_INV_MASK) == SND_SOC_DAIFMT_NB_IF) {
479 return -EINVAL;
480 }
481 iface |= 0x00018;
482 break;
483 default:
484 return -EINVAL;
485 }
486
487 /* clock inversion */
488 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
489 case SND_SOC_DAIFMT_NB_NF:
490 break;
491 case SND_SOC_DAIFMT_IB_IF:
492 iface |= 0x0180;
493 break;
494 case SND_SOC_DAIFMT_IB_NF:
495 iface |= 0x0100;
496 break;
497 case SND_SOC_DAIFMT_NB_IF:
498 iface |= 0x0080;
499 break;
500 default:
501 return -EINVAL;
502 }
503
504 snd_soc_component_write(component, WM8974_IFACE, iface);
505 snd_soc_component_write(component, WM8974_CLOCK, clk);
506 return 0;
507 }
508
wm8974_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)509 static int wm8974_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_component *component = dai->component;
514 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
515 u16 iface = snd_soc_component_read(component, WM8974_IFACE) & 0x19f;
516 u16 adn = snd_soc_component_read(component, WM8974_ADD) & 0x1f1;
517 int err;
518
519 priv->fs = params_rate(params);
520 err = wm8974_update_clocks(dai);
521 if (err)
522 return err;
523
524 /* bit size */
525 switch (params_width(params)) {
526 case 16:
527 break;
528 case 20:
529 iface |= 0x0020;
530 break;
531 case 24:
532 iface |= 0x0040;
533 break;
534 case 32:
535 iface |= 0x0060;
536 break;
537 }
538
539 /* filter coefficient */
540 switch (params_rate(params)) {
541 case 8000:
542 adn |= 0x5 << 1;
543 break;
544 case 11025:
545 adn |= 0x4 << 1;
546 break;
547 case 16000:
548 adn |= 0x3 << 1;
549 break;
550 case 22050:
551 adn |= 0x2 << 1;
552 break;
553 case 32000:
554 adn |= 0x1 << 1;
555 break;
556 case 44100:
557 case 48000:
558 break;
559 }
560
561 snd_soc_component_write(component, WM8974_IFACE, iface);
562 snd_soc_component_write(component, WM8974_ADD, adn);
563 return 0;
564 }
565
wm8974_mute(struct snd_soc_dai * dai,int mute,int direction)566 static int wm8974_mute(struct snd_soc_dai *dai, int mute, int direction)
567 {
568 struct snd_soc_component *component = dai->component;
569 u16 mute_reg = snd_soc_component_read(component, WM8974_DAC) & 0xffbf;
570
571 if (mute)
572 snd_soc_component_write(component, WM8974_DAC, mute_reg | 0x40);
573 else
574 snd_soc_component_write(component, WM8974_DAC, mute_reg);
575 return 0;
576 }
577
578 /* liam need to make this lower power with dapm */
wm8974_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)579 static int wm8974_set_bias_level(struct snd_soc_component *component,
580 enum snd_soc_bias_level level)
581 {
582 u16 power1 = snd_soc_component_read(component, WM8974_POWER1) & ~0x3;
583
584 switch (level) {
585 case SND_SOC_BIAS_ON:
586 case SND_SOC_BIAS_PREPARE:
587 power1 |= 0x1; /* VMID 50k */
588 snd_soc_component_write(component, WM8974_POWER1, power1);
589 break;
590
591 case SND_SOC_BIAS_STANDBY:
592 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
593
594 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
595 regcache_sync(dev_get_regmap(component->dev, NULL));
596
597 /* Initial cap charge at VMID 5k */
598 snd_soc_component_write(component, WM8974_POWER1, power1 | 0x3);
599 mdelay(100);
600 }
601
602 power1 |= 0x2; /* VMID 500k */
603 snd_soc_component_write(component, WM8974_POWER1, power1);
604 break;
605
606 case SND_SOC_BIAS_OFF:
607 snd_soc_component_write(component, WM8974_POWER1, 0);
608 snd_soc_component_write(component, WM8974_POWER2, 0);
609 snd_soc_component_write(component, WM8974_POWER3, 0);
610 break;
611 }
612
613 return 0;
614 }
615
616 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
617
618 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
619 SNDRV_PCM_FMTBIT_S24_LE)
620
621 static const struct snd_soc_dai_ops wm8974_ops = {
622 .hw_params = wm8974_pcm_hw_params,
623 .mute_stream = wm8974_mute,
624 .set_fmt = wm8974_set_dai_fmt,
625 .set_clkdiv = wm8974_set_dai_clkdiv,
626 .set_pll = wm8974_set_dai_pll,
627 .set_sysclk = wm8974_set_dai_sysclk,
628 .no_capture_mute = 1,
629 };
630
631 static struct snd_soc_dai_driver wm8974_dai = {
632 .name = "wm8974-hifi",
633 .playback = {
634 .stream_name = "Playback",
635 .channels_min = 1,
636 .channels_max = 2, /* Only 1 channel of data */
637 .rates = WM8974_RATES,
638 .formats = WM8974_FORMATS,},
639 .capture = {
640 .stream_name = "Capture",
641 .channels_min = 1,
642 .channels_max = 2, /* Only 1 channel of data */
643 .rates = WM8974_RATES,
644 .formats = WM8974_FORMATS,},
645 .ops = &wm8974_ops,
646 .symmetric_rates = 1,
647 };
648
649 static const struct regmap_config wm8974_regmap = {
650 .reg_bits = 7,
651 .val_bits = 9,
652
653 .max_register = WM8974_MONOMIX,
654 .reg_defaults = wm8974_reg_defaults,
655 .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
656 .cache_type = REGCACHE_FLAT,
657 };
658
wm8974_probe(struct snd_soc_component * component)659 static int wm8974_probe(struct snd_soc_component *component)
660 {
661 int ret = 0;
662
663 ret = wm8974_reset(component);
664 if (ret < 0) {
665 dev_err(component->dev, "Failed to issue reset\n");
666 return ret;
667 }
668
669 return 0;
670 }
671
672 static const struct snd_soc_component_driver soc_component_dev_wm8974 = {
673 .probe = wm8974_probe,
674 .set_bias_level = wm8974_set_bias_level,
675 .controls = wm8974_snd_controls,
676 .num_controls = ARRAY_SIZE(wm8974_snd_controls),
677 .dapm_widgets = wm8974_dapm_widgets,
678 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
679 .dapm_routes = wm8974_dapm_routes,
680 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
681 .suspend_bias_off = 1,
682 .idle_bias_on = 1,
683 .use_pmdown_time = 1,
684 .endianness = 1,
685 .non_legacy_dai_naming = 1,
686 };
687
wm8974_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)688 static int wm8974_i2c_probe(struct i2c_client *i2c,
689 const struct i2c_device_id *id)
690 {
691 struct wm8974_priv *priv;
692 struct regmap *regmap;
693 int ret;
694
695 priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
696 if (!priv)
697 return -ENOMEM;
698
699 i2c_set_clientdata(i2c, priv);
700
701 regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
702 if (IS_ERR(regmap))
703 return PTR_ERR(regmap);
704
705 ret = devm_snd_soc_register_component(&i2c->dev,
706 &soc_component_dev_wm8974, &wm8974_dai, 1);
707
708 return ret;
709 }
710
711 static const struct i2c_device_id wm8974_i2c_id[] = {
712 { "wm8974", 0 },
713 { }
714 };
715 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
716
717 static const struct of_device_id wm8974_of_match[] = {
718 { .compatible = "wlf,wm8974", },
719 { }
720 };
721 MODULE_DEVICE_TABLE(of, wm8974_of_match);
722
723 static struct i2c_driver wm8974_i2c_driver = {
724 .driver = {
725 .name = "wm8974",
726 .of_match_table = wm8974_of_match,
727 },
728 .probe = wm8974_i2c_probe,
729 .id_table = wm8974_i2c_id,
730 };
731
732 module_i2c_driver(wm8974_i2c_driver);
733
734 MODULE_DESCRIPTION("ASoC WM8974 driver");
735 MODULE_AUTHOR("Liam Girdwood");
736 MODULE_LICENSE("GPL");
737
