xref: /openbmc/linux/sound/soc/codecs/wm8974.c (revision e2d413f9)
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, 0),
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 
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 
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_read32(component, WM8974_CLOCK);
322 		snd_soc_component_write(component, WM8974_CLOCK, reg & 0x0ff);
323 
324 		/* Turn off PLL */
325 		reg = snd_soc_component_read32(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_read32(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_read32(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  */
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_read32(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_read32(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_read32(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 
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 
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 
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 
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_read32(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 		iface |= 0x00018;
478 		break;
479 	default:
480 		return -EINVAL;
481 	}
482 
483 	/* clock inversion */
484 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
485 	case SND_SOC_DAIFMT_NB_NF:
486 		break;
487 	case SND_SOC_DAIFMT_IB_IF:
488 		iface |= 0x0180;
489 		break;
490 	case SND_SOC_DAIFMT_IB_NF:
491 		iface |= 0x0100;
492 		break;
493 	case SND_SOC_DAIFMT_NB_IF:
494 		iface |= 0x0080;
495 		break;
496 	default:
497 		return -EINVAL;
498 	}
499 
500 	snd_soc_component_write(component, WM8974_IFACE, iface);
501 	snd_soc_component_write(component, WM8974_CLOCK, clk);
502 	return 0;
503 }
504 
505 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
506 				struct snd_pcm_hw_params *params,
507 				struct snd_soc_dai *dai)
508 {
509 	struct snd_soc_component *component = dai->component;
510 	struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
511 	u16 iface = snd_soc_component_read32(component, WM8974_IFACE) & 0x19f;
512 	u16 adn = snd_soc_component_read32(component, WM8974_ADD) & 0x1f1;
513 	int err;
514 
515 	priv->fs = params_rate(params);
516 	err = wm8974_update_clocks(dai);
517 	if (err)
518 		return err;
519 
520 	/* bit size */
521 	switch (params_width(params)) {
522 	case 16:
523 		break;
524 	case 20:
525 		iface |= 0x0020;
526 		break;
527 	case 24:
528 		iface |= 0x0040;
529 		break;
530 	case 32:
531 		iface |= 0x0060;
532 		break;
533 	}
534 
535 	/* filter coefficient */
536 	switch (params_rate(params)) {
537 	case 8000:
538 		adn |= 0x5 << 1;
539 		break;
540 	case 11025:
541 		adn |= 0x4 << 1;
542 		break;
543 	case 16000:
544 		adn |= 0x3 << 1;
545 		break;
546 	case 22050:
547 		adn |= 0x2 << 1;
548 		break;
549 	case 32000:
550 		adn |= 0x1 << 1;
551 		break;
552 	case 44100:
553 	case 48000:
554 		break;
555 	}
556 
557 	snd_soc_component_write(component, WM8974_IFACE, iface);
558 	snd_soc_component_write(component, WM8974_ADD, adn);
559 	return 0;
560 }
561 
562 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
563 {
564 	struct snd_soc_component *component = dai->component;
565 	u16 mute_reg = snd_soc_component_read32(component, WM8974_DAC) & 0xffbf;
566 
567 	if (mute)
568 		snd_soc_component_write(component, WM8974_DAC, mute_reg | 0x40);
569 	else
570 		snd_soc_component_write(component, WM8974_DAC, mute_reg);
571 	return 0;
572 }
573 
574 /* liam need to make this lower power with dapm */
575 static int wm8974_set_bias_level(struct snd_soc_component *component,
576 	enum snd_soc_bias_level level)
577 {
578 	u16 power1 = snd_soc_component_read32(component, WM8974_POWER1) & ~0x3;
579 
580 	switch (level) {
581 	case SND_SOC_BIAS_ON:
582 	case SND_SOC_BIAS_PREPARE:
583 		power1 |= 0x1;  /* VMID 50k */
584 		snd_soc_component_write(component, WM8974_POWER1, power1);
585 		break;
586 
587 	case SND_SOC_BIAS_STANDBY:
588 		power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
589 
590 		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
591 			regcache_sync(dev_get_regmap(component->dev, NULL));
592 
593 			/* Initial cap charge at VMID 5k */
594 			snd_soc_component_write(component, WM8974_POWER1, power1 | 0x3);
595 			mdelay(100);
596 		}
597 
598 		power1 |= 0x2;  /* VMID 500k */
599 		snd_soc_component_write(component, WM8974_POWER1, power1);
600 		break;
601 
602 	case SND_SOC_BIAS_OFF:
603 		snd_soc_component_write(component, WM8974_POWER1, 0);
604 		snd_soc_component_write(component, WM8974_POWER2, 0);
605 		snd_soc_component_write(component, WM8974_POWER3, 0);
606 		break;
607 	}
608 
609 	return 0;
610 }
611 
612 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
613 
614 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
615 	SNDRV_PCM_FMTBIT_S24_LE)
616 
617 static const struct snd_soc_dai_ops wm8974_ops = {
618 	.hw_params = wm8974_pcm_hw_params,
619 	.digital_mute = wm8974_mute,
620 	.set_fmt = wm8974_set_dai_fmt,
621 	.set_clkdiv = wm8974_set_dai_clkdiv,
622 	.set_pll = wm8974_set_dai_pll,
623 	.set_sysclk = wm8974_set_dai_sysclk,
624 };
625 
626 static struct snd_soc_dai_driver wm8974_dai = {
627 	.name = "wm8974-hifi",
628 	.playback = {
629 		.stream_name = "Playback",
630 		.channels_min = 1,
631 		.channels_max = 2,   /* Only 1 channel of data */
632 		.rates = WM8974_RATES,
633 		.formats = WM8974_FORMATS,},
634 	.capture = {
635 		.stream_name = "Capture",
636 		.channels_min = 1,
637 		.channels_max = 2,   /* Only 1 channel of data */
638 		.rates = WM8974_RATES,
639 		.formats = WM8974_FORMATS,},
640 	.ops = &wm8974_ops,
641 	.symmetric_rates = 1,
642 };
643 
644 static const struct regmap_config wm8974_regmap = {
645 	.reg_bits = 7,
646 	.val_bits = 9,
647 
648 	.max_register = WM8974_MONOMIX,
649 	.reg_defaults = wm8974_reg_defaults,
650 	.num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
651 	.cache_type = REGCACHE_FLAT,
652 };
653 
654 static int wm8974_probe(struct snd_soc_component *component)
655 {
656 	int ret = 0;
657 
658 	ret = wm8974_reset(component);
659 	if (ret < 0) {
660 		dev_err(component->dev, "Failed to issue reset\n");
661 		return ret;
662 	}
663 
664 	return 0;
665 }
666 
667 static const struct snd_soc_component_driver soc_component_dev_wm8974 = {
668 	.probe			= wm8974_probe,
669 	.set_bias_level		= wm8974_set_bias_level,
670 	.controls		= wm8974_snd_controls,
671 	.num_controls		= ARRAY_SIZE(wm8974_snd_controls),
672 	.dapm_widgets		= wm8974_dapm_widgets,
673 	.num_dapm_widgets	= ARRAY_SIZE(wm8974_dapm_widgets),
674 	.dapm_routes		= wm8974_dapm_routes,
675 	.num_dapm_routes	= ARRAY_SIZE(wm8974_dapm_routes),
676 	.suspend_bias_off	= 1,
677 	.idle_bias_on		= 1,
678 	.use_pmdown_time	= 1,
679 	.endianness		= 1,
680 	.non_legacy_dai_naming	= 1,
681 };
682 
683 static int wm8974_i2c_probe(struct i2c_client *i2c,
684 			    const struct i2c_device_id *id)
685 {
686 	struct wm8974_priv *priv;
687 	struct regmap *regmap;
688 	int ret;
689 
690 	priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
691 	if (!priv)
692 		return -ENOMEM;
693 
694 	i2c_set_clientdata(i2c, priv);
695 
696 	regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
697 	if (IS_ERR(regmap))
698 		return PTR_ERR(regmap);
699 
700 	ret = devm_snd_soc_register_component(&i2c->dev,
701 			&soc_component_dev_wm8974, &wm8974_dai, 1);
702 
703 	return ret;
704 }
705 
706 static const struct i2c_device_id wm8974_i2c_id[] = {
707 	{ "wm8974", 0 },
708 	{ }
709 };
710 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
711 
712 static const struct of_device_id wm8974_of_match[] = {
713        { .compatible = "wlf,wm8974", },
714        { }
715 };
716 MODULE_DEVICE_TABLE(of, wm8974_of_match);
717 
718 static struct i2c_driver wm8974_i2c_driver = {
719 	.driver = {
720 		.name = "wm8974",
721 		.of_match_table = wm8974_of_match,
722 	},
723 	.probe =    wm8974_i2c_probe,
724 	.id_table = wm8974_i2c_id,
725 };
726 
727 module_i2c_driver(wm8974_i2c_driver);
728 
729 MODULE_DESCRIPTION("ASoC WM8974 driver");
730 MODULE_AUTHOR("Liam Girdwood");
731 MODULE_LICENSE("GPL");
732