xref: /openbmc/linux/sound/soc/codecs/wm8961.c (revision d643047e)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * wm8961.c  --  WM8961 ALSA SoC Audio driver
4  *
5  * Copyright 2009-10 Wolfson Microelectronics, plc
6  *
7  * Author: Mark Brown
8  *
9  * Currently unimplemented features:
10  *  - ALC
11  */
12 
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/pm.h>
18 #include <linux/i2c.h>
19 #include <linux/regmap.h>
20 #include <linux/slab.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/initval.h>
26 #include <sound/tlv.h>
27 
28 #include "wm8961.h"
29 
30 #define WM8961_MAX_REGISTER                     0xFC
31 
32 static const struct reg_default wm8961_reg_defaults[] = {
33 	{  0, 0x009F },     /* R0   - Left Input volume */
34 	{  1, 0x009F },     /* R1   - Right Input volume */
35 	{  2, 0x0000 },     /* R2   - LOUT1 volume */
36 	{  3, 0x0000 },     /* R3   - ROUT1 volume */
37 	{  4, 0x0020 },     /* R4   - Clocking1 */
38 	{  5, 0x0008 },     /* R5   - ADC & DAC Control 1 */
39 	{  6, 0x0000 },     /* R6   - ADC & DAC Control 2 */
40 	{  7, 0x000A },     /* R7   - Audio Interface 0 */
41 	{  8, 0x01F4 },     /* R8   - Clocking2 */
42 	{  9, 0x0000 },     /* R9   - Audio Interface 1 */
43 	{ 10, 0x00FF },     /* R10  - Left DAC volume */
44 	{ 11, 0x00FF },     /* R11  - Right DAC volume */
45 
46 	{ 14, 0x0040 },     /* R14  - Audio Interface 2 */
47 
48 	{ 17, 0x007B },     /* R17  - ALC1 */
49 	{ 18, 0x0000 },     /* R18  - ALC2 */
50 	{ 19, 0x0032 },     /* R19  - ALC3 */
51 	{ 20, 0x0000 },     /* R20  - Noise Gate */
52 	{ 21, 0x00C0 },     /* R21  - Left ADC volume */
53 	{ 22, 0x00C0 },     /* R22  - Right ADC volume */
54 	{ 23, 0x0120 },     /* R23  - Additional control(1) */
55 	{ 24, 0x0000 },     /* R24  - Additional control(2) */
56 	{ 25, 0x0000 },     /* R25  - Pwr Mgmt (1) */
57 	{ 26, 0x0000 },     /* R26  - Pwr Mgmt (2) */
58 	{ 27, 0x0000 },     /* R27  - Additional Control (3) */
59 	{ 28, 0x0000 },     /* R28  - Anti-pop */
60 
61 	{ 30, 0x005F },     /* R30  - Clocking 3 */
62 
63 	{ 32, 0x0000 },     /* R32  - ADCL signal path */
64 	{ 33, 0x0000 },     /* R33  - ADCR signal path */
65 
66 	{ 40, 0x0000 },     /* R40  - LOUT2 volume */
67 	{ 41, 0x0000 },     /* R41  - ROUT2 volume */
68 
69 	{ 47, 0x0000 },     /* R47  - Pwr Mgmt (3) */
70 	{ 48, 0x0023 },     /* R48  - Additional Control (4) */
71 	{ 49, 0x0000 },     /* R49  - Class D Control 1 */
72 
73 	{ 51, 0x0003 },     /* R51  - Class D Control 2 */
74 
75 	{ 56, 0x0106 },     /* R56  - Clocking 4 */
76 	{ 57, 0x0000 },     /* R57  - DSP Sidetone 0 */
77 	{ 58, 0x0000 },     /* R58  - DSP Sidetone 1 */
78 
79 	{ 60, 0x0000 },     /* R60  - DC Servo 0 */
80 	{ 61, 0x0000 },     /* R61  - DC Servo 1 */
81 
82 	{ 63, 0x015E },     /* R63  - DC Servo 3 */
83 
84 	{ 65, 0x0010 },     /* R65  - DC Servo 5 */
85 
86 	{ 68, 0x0003 },     /* R68  - Analogue PGA Bias */
87 	{ 69, 0x0000 },     /* R69  - Analogue HP 0 */
88 
89 	{ 71, 0x01FB },     /* R71  - Analogue HP 2 */
90 	{ 72, 0x0000 },     /* R72  - Charge Pump 1 */
91 
92 	{ 82, 0x0000 },     /* R82  - Charge Pump B */
93 
94 	{ 87, 0x0000 },     /* R87  - Write Sequencer 1 */
95 	{ 88, 0x0000 },     /* R88  - Write Sequencer 2 */
96 	{ 89, 0x0000 },     /* R89  - Write Sequencer 3 */
97 	{ 90, 0x0000 },     /* R90  - Write Sequencer 4 */
98 	{ 91, 0x0000 },     /* R91  - Write Sequencer 5 */
99 	{ 92, 0x0000 },     /* R92  - Write Sequencer 6 */
100 	{ 93, 0x0000 },     /* R93  - Write Sequencer 7 */
101 
102 	{ 252, 0x0001 },     /* R252 - General test 1 */
103 };
104 
105 struct wm8961_priv {
106 	struct regmap *regmap;
107 	int sysclk;
108 };
109 
wm8961_volatile(struct device * dev,unsigned int reg)110 static bool wm8961_volatile(struct device *dev, unsigned int reg)
111 {
112 	switch (reg) {
113 	case WM8961_SOFTWARE_RESET:
114 	case WM8961_WRITE_SEQUENCER_7:
115 	case WM8961_DC_SERVO_1:
116 		return true;
117 
118 	default:
119 		return false;
120 	}
121 }
122 
wm8961_readable(struct device * dev,unsigned int reg)123 static bool wm8961_readable(struct device *dev, unsigned int reg)
124 {
125 	switch (reg) {
126 	case WM8961_LEFT_INPUT_VOLUME:
127 	case WM8961_RIGHT_INPUT_VOLUME:
128 	case WM8961_LOUT1_VOLUME:
129 	case WM8961_ROUT1_VOLUME:
130 	case WM8961_CLOCKING1:
131 	case WM8961_ADC_DAC_CONTROL_1:
132 	case WM8961_ADC_DAC_CONTROL_2:
133 	case WM8961_AUDIO_INTERFACE_0:
134 	case WM8961_CLOCKING2:
135 	case WM8961_AUDIO_INTERFACE_1:
136 	case WM8961_LEFT_DAC_VOLUME:
137 	case WM8961_RIGHT_DAC_VOLUME:
138 	case WM8961_AUDIO_INTERFACE_2:
139 	case WM8961_SOFTWARE_RESET:
140 	case WM8961_ALC1:
141 	case WM8961_ALC2:
142 	case WM8961_ALC3:
143 	case WM8961_NOISE_GATE:
144 	case WM8961_LEFT_ADC_VOLUME:
145 	case WM8961_RIGHT_ADC_VOLUME:
146 	case WM8961_ADDITIONAL_CONTROL_1:
147 	case WM8961_ADDITIONAL_CONTROL_2:
148 	case WM8961_PWR_MGMT_1:
149 	case WM8961_PWR_MGMT_2:
150 	case WM8961_ADDITIONAL_CONTROL_3:
151 	case WM8961_ANTI_POP:
152 	case WM8961_CLOCKING_3:
153 	case WM8961_ADCL_SIGNAL_PATH:
154 	case WM8961_ADCR_SIGNAL_PATH:
155 	case WM8961_LOUT2_VOLUME:
156 	case WM8961_ROUT2_VOLUME:
157 	case WM8961_PWR_MGMT_3:
158 	case WM8961_ADDITIONAL_CONTROL_4:
159 	case WM8961_CLASS_D_CONTROL_1:
160 	case WM8961_CLASS_D_CONTROL_2:
161 	case WM8961_CLOCKING_4:
162 	case WM8961_DSP_SIDETONE_0:
163 	case WM8961_DSP_SIDETONE_1:
164 	case WM8961_DC_SERVO_0:
165 	case WM8961_DC_SERVO_1:
166 	case WM8961_DC_SERVO_3:
167 	case WM8961_DC_SERVO_5:
168 	case WM8961_ANALOGUE_PGA_BIAS:
169 	case WM8961_ANALOGUE_HP_0:
170 	case WM8961_ANALOGUE_HP_2:
171 	case WM8961_CHARGE_PUMP_1:
172 	case WM8961_CHARGE_PUMP_B:
173 	case WM8961_WRITE_SEQUENCER_1:
174 	case WM8961_WRITE_SEQUENCER_2:
175 	case WM8961_WRITE_SEQUENCER_3:
176 	case WM8961_WRITE_SEQUENCER_4:
177 	case WM8961_WRITE_SEQUENCER_5:
178 	case WM8961_WRITE_SEQUENCER_6:
179 	case WM8961_WRITE_SEQUENCER_7:
180 	case WM8961_GENERAL_TEST_1:
181 		return true;
182 	default:
183 		return false;
184 	}
185 }
186 
187 /*
188  * The headphone output supports special anti-pop sequences giving
189  * silent power up and power down.
190  */
wm8961_hp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)191 static int wm8961_hp_event(struct snd_soc_dapm_widget *w,
192 			   struct snd_kcontrol *kcontrol, int event)
193 {
194 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
195 	u16 hp_reg = snd_soc_component_read(component, WM8961_ANALOGUE_HP_0);
196 	u16 cp_reg = snd_soc_component_read(component, WM8961_CHARGE_PUMP_1);
197 	u16 pwr_reg = snd_soc_component_read(component, WM8961_PWR_MGMT_2);
198 	u16 dcs_reg = snd_soc_component_read(component, WM8961_DC_SERVO_1);
199 	int timeout = 500;
200 
201 	if (event & SND_SOC_DAPM_POST_PMU) {
202 		/* Make sure the output is shorted */
203 		hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT);
204 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
205 
206 		/* Enable the charge pump */
207 		cp_reg |= WM8961_CP_ENA;
208 		snd_soc_component_write(component, WM8961_CHARGE_PUMP_1, cp_reg);
209 		mdelay(5);
210 
211 		/* Enable the PGA */
212 		pwr_reg |= WM8961_LOUT1_PGA | WM8961_ROUT1_PGA;
213 		snd_soc_component_write(component, WM8961_PWR_MGMT_2, pwr_reg);
214 
215 		/* Enable the amplifier */
216 		hp_reg |= WM8961_HPR_ENA | WM8961_HPL_ENA;
217 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
218 
219 		/* Second stage enable */
220 		hp_reg |= WM8961_HPR_ENA_DLY | WM8961_HPL_ENA_DLY;
221 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
222 
223 		/* Enable the DC servo & trigger startup */
224 		dcs_reg |=
225 			WM8961_DCS_ENA_CHAN_HPR | WM8961_DCS_TRIG_STARTUP_HPR |
226 			WM8961_DCS_ENA_CHAN_HPL | WM8961_DCS_TRIG_STARTUP_HPL;
227 		dev_dbg(component->dev, "Enabling DC servo\n");
228 
229 		snd_soc_component_write(component, WM8961_DC_SERVO_1, dcs_reg);
230 		do {
231 			msleep(1);
232 			dcs_reg = snd_soc_component_read(component, WM8961_DC_SERVO_1);
233 		} while (--timeout &&
234 			 dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR |
235 				WM8961_DCS_TRIG_STARTUP_HPL));
236 		if (dcs_reg & (WM8961_DCS_TRIG_STARTUP_HPR |
237 			       WM8961_DCS_TRIG_STARTUP_HPL))
238 			dev_err(component->dev, "DC servo timed out\n");
239 		else
240 			dev_dbg(component->dev, "DC servo startup complete\n");
241 
242 		/* Enable the output stage */
243 		hp_reg |= WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP;
244 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
245 
246 		/* Remove the short on the output stage */
247 		hp_reg |= WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT;
248 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
249 	}
250 
251 	if (event & SND_SOC_DAPM_PRE_PMD) {
252 		/* Short the output */
253 		hp_reg &= ~(WM8961_HPR_RMV_SHORT | WM8961_HPL_RMV_SHORT);
254 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
255 
256 		/* Disable the output stage */
257 		hp_reg &= ~(WM8961_HPR_ENA_OUTP | WM8961_HPL_ENA_OUTP);
258 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
259 
260 		/* Disable DC offset cancellation */
261 		dcs_reg &= ~(WM8961_DCS_ENA_CHAN_HPR |
262 			     WM8961_DCS_ENA_CHAN_HPL);
263 		snd_soc_component_write(component, WM8961_DC_SERVO_1, dcs_reg);
264 
265 		/* Finish up */
266 		hp_reg &= ~(WM8961_HPR_ENA_DLY | WM8961_HPR_ENA |
267 			    WM8961_HPL_ENA_DLY | WM8961_HPL_ENA);
268 		snd_soc_component_write(component, WM8961_ANALOGUE_HP_0, hp_reg);
269 
270 		/* Disable the PGA */
271 		pwr_reg &= ~(WM8961_LOUT1_PGA | WM8961_ROUT1_PGA);
272 		snd_soc_component_write(component, WM8961_PWR_MGMT_2, pwr_reg);
273 
274 		/* Disable the charge pump */
275 		dev_dbg(component->dev, "Disabling charge pump\n");
276 		snd_soc_component_write(component, WM8961_CHARGE_PUMP_1,
277 			     cp_reg & ~WM8961_CP_ENA);
278 	}
279 
280 	return 0;
281 }
282 
wm8961_spk_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)283 static int wm8961_spk_event(struct snd_soc_dapm_widget *w,
284 			    struct snd_kcontrol *kcontrol, int event)
285 {
286 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
287 	u16 pwr_reg = snd_soc_component_read(component, WM8961_PWR_MGMT_2);
288 	u16 spk_reg = snd_soc_component_read(component, WM8961_CLASS_D_CONTROL_1);
289 
290 	if (event & SND_SOC_DAPM_POST_PMU) {
291 		/* Enable the PGA */
292 		pwr_reg |= WM8961_SPKL_PGA | WM8961_SPKR_PGA;
293 		snd_soc_component_write(component, WM8961_PWR_MGMT_2, pwr_reg);
294 
295 		/* Enable the amplifier */
296 		spk_reg |= WM8961_SPKL_ENA | WM8961_SPKR_ENA;
297 		snd_soc_component_write(component, WM8961_CLASS_D_CONTROL_1, spk_reg);
298 	}
299 
300 	if (event & SND_SOC_DAPM_PRE_PMD) {
301 		/* Disable the amplifier */
302 		spk_reg &= ~(WM8961_SPKL_ENA | WM8961_SPKR_ENA);
303 		snd_soc_component_write(component, WM8961_CLASS_D_CONTROL_1, spk_reg);
304 
305 		/* Disable the PGA */
306 		pwr_reg &= ~(WM8961_SPKL_PGA | WM8961_SPKR_PGA);
307 		snd_soc_component_write(component, WM8961_PWR_MGMT_2, pwr_reg);
308 	}
309 
310 	return 0;
311 }
312 
313 static const char *adc_hpf_text[] = {
314 	"Hi-fi", "Voice 1", "Voice 2", "Voice 3",
315 };
316 
317 static SOC_ENUM_SINGLE_DECL(adc_hpf,
318 			    WM8961_ADC_DAC_CONTROL_2, 7, adc_hpf_text);
319 
320 static const char *dac_deemph_text[] = {
321 	"None", "32kHz", "44.1kHz", "48kHz",
322 };
323 
324 static SOC_ENUM_SINGLE_DECL(dac_deemph,
325 			    WM8961_ADC_DAC_CONTROL_1, 1, dac_deemph_text);
326 
327 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
328 static const DECLARE_TLV_DB_SCALE(hp_sec_tlv, -700, 100, 0);
329 static const DECLARE_TLV_DB_SCALE(adc_tlv, -7200, 75, 1);
330 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -3600, 300, 0);
331 static const DECLARE_TLV_DB_RANGE(boost_tlv,
332 	0, 0, TLV_DB_SCALE_ITEM(0,  0, 0),
333 	1, 1, TLV_DB_SCALE_ITEM(13, 0, 0),
334 	2, 2, TLV_DB_SCALE_ITEM(20, 0, 0),
335 	3, 3, TLV_DB_SCALE_ITEM(29, 0, 0)
336 );
337 static const DECLARE_TLV_DB_SCALE(pga_tlv, -2325, 75, 0);
338 
339 static const struct snd_kcontrol_new wm8961_snd_controls[] = {
340 SOC_DOUBLE_R_TLV("Headphone Volume", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME,
341 		 0, 127, 0, out_tlv),
342 SOC_DOUBLE_TLV("Headphone Secondary Volume", WM8961_ANALOGUE_HP_2,
343 	       6, 3, 7, 0, hp_sec_tlv),
344 SOC_DOUBLE_R("Headphone ZC Switch", WM8961_LOUT1_VOLUME, WM8961_ROUT1_VOLUME,
345 	     7, 1, 0),
346 
347 SOC_DOUBLE_R_TLV("Speaker Volume", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME,
348 		 0, 127, 0, out_tlv),
349 SOC_DOUBLE_R("Speaker ZC Switch", WM8961_LOUT2_VOLUME, WM8961_ROUT2_VOLUME,
350 	   7, 1, 0),
351 SOC_SINGLE("Speaker AC Gain", WM8961_CLASS_D_CONTROL_2, 0, 7, 0),
352 
353 SOC_SINGLE("DAC x128 OSR Switch", WM8961_ADC_DAC_CONTROL_2, 0, 1, 0),
354 SOC_ENUM("DAC Deemphasis", dac_deemph),
355 SOC_SINGLE("DAC Soft Mute Switch", WM8961_ADC_DAC_CONTROL_2, 3, 1, 0),
356 
357 SOC_DOUBLE_R_TLV("Sidetone Volume", WM8961_DSP_SIDETONE_0,
358 		 WM8961_DSP_SIDETONE_1, 4, 12, 0, sidetone_tlv),
359 
360 SOC_SINGLE("ADC High Pass Filter Switch", WM8961_ADC_DAC_CONTROL_1, 0, 1, 0),
361 SOC_ENUM("ADC High Pass Filter Mode", adc_hpf),
362 
363 SOC_DOUBLE_R_TLV("Capture Volume",
364 		 WM8961_LEFT_ADC_VOLUME, WM8961_RIGHT_ADC_VOLUME,
365 		 1, 119, 0, adc_tlv),
366 SOC_DOUBLE_R_TLV("Capture Boost Volume",
367 		 WM8961_ADCL_SIGNAL_PATH, WM8961_ADCR_SIGNAL_PATH,
368 		 4, 3, 0, boost_tlv),
369 SOC_DOUBLE_R_TLV("Capture PGA Volume",
370 		 WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME,
371 		 0, 62, 0, pga_tlv),
372 SOC_DOUBLE_R("Capture PGA ZC Switch",
373 	     WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME,
374 	     6, 1, 1),
375 SOC_DOUBLE_R("Capture PGA Switch",
376 	     WM8961_LEFT_INPUT_VOLUME, WM8961_RIGHT_INPUT_VOLUME,
377 	     7, 1, 1),
378 };
379 
380 static const char *sidetone_text[] = {
381 	"None", "Left", "Right"
382 };
383 
384 static SOC_ENUM_SINGLE_DECL(dacl_sidetone,
385 			    WM8961_DSP_SIDETONE_0, 2, sidetone_text);
386 
387 static SOC_ENUM_SINGLE_DECL(dacr_sidetone,
388 			    WM8961_DSP_SIDETONE_1, 2, sidetone_text);
389 
390 static const struct snd_kcontrol_new dacl_mux =
391 	SOC_DAPM_ENUM("DACL Sidetone", dacl_sidetone);
392 
393 static const struct snd_kcontrol_new dacr_mux =
394 	SOC_DAPM_ENUM("DACR Sidetone", dacr_sidetone);
395 
396 static const struct snd_soc_dapm_widget wm8961_dapm_widgets[] = {
397 SND_SOC_DAPM_INPUT("LINPUT"),
398 SND_SOC_DAPM_INPUT("RINPUT"),
399 
400 SND_SOC_DAPM_SUPPLY("CLK_DSP", WM8961_CLOCKING2, 4, 0, NULL, 0),
401 
402 SND_SOC_DAPM_PGA("Left Input", WM8961_PWR_MGMT_1, 5, 0, NULL, 0),
403 SND_SOC_DAPM_PGA("Right Input", WM8961_PWR_MGMT_1, 4, 0, NULL, 0),
404 
405 SND_SOC_DAPM_ADC("ADCL", "HiFi Capture", WM8961_PWR_MGMT_1, 3, 0),
406 SND_SOC_DAPM_ADC("ADCR", "HiFi Capture", WM8961_PWR_MGMT_1, 2, 0),
407 
408 SND_SOC_DAPM_SUPPLY("MICBIAS", WM8961_PWR_MGMT_1, 1, 0, NULL, 0),
409 
410 SND_SOC_DAPM_MUX("DACL Sidetone", SND_SOC_NOPM, 0, 0, &dacl_mux),
411 SND_SOC_DAPM_MUX("DACR Sidetone", SND_SOC_NOPM, 0, 0, &dacr_mux),
412 
413 SND_SOC_DAPM_DAC("DACL", "HiFi Playback", WM8961_PWR_MGMT_2, 8, 0),
414 SND_SOC_DAPM_DAC("DACR", "HiFi Playback", WM8961_PWR_MGMT_2, 7, 0),
415 
416 /* Handle as a mono path for DCS */
417 SND_SOC_DAPM_PGA_E("Headphone Output", SND_SOC_NOPM,
418 		   4, 0, NULL, 0, wm8961_hp_event,
419 		   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
420 SND_SOC_DAPM_PGA_E("Speaker Output", SND_SOC_NOPM,
421 		   4, 0, NULL, 0, wm8961_spk_event,
422 		   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
423 
424 SND_SOC_DAPM_OUTPUT("HP_L"),
425 SND_SOC_DAPM_OUTPUT("HP_R"),
426 SND_SOC_DAPM_OUTPUT("SPK_LN"),
427 SND_SOC_DAPM_OUTPUT("SPK_LP"),
428 SND_SOC_DAPM_OUTPUT("SPK_RN"),
429 SND_SOC_DAPM_OUTPUT("SPK_RP"),
430 };
431 
432 
433 static const struct snd_soc_dapm_route audio_paths[] = {
434 	{ "DACL", NULL, "CLK_DSP" },
435 	{ "DACL", NULL, "DACL Sidetone" },
436 	{ "DACR", NULL, "CLK_DSP" },
437 	{ "DACR", NULL, "DACR Sidetone" },
438 
439 	{ "DACL Sidetone", "Left", "ADCL" },
440 	{ "DACL Sidetone", "Right", "ADCR" },
441 
442 	{ "DACR Sidetone", "Left", "ADCL" },
443 	{ "DACR Sidetone", "Right", "ADCR" },
444 
445 	{ "HP_L", NULL, "Headphone Output" },
446 	{ "HP_R", NULL, "Headphone Output" },
447 	{ "Headphone Output", NULL, "DACL" },
448 	{ "Headphone Output", NULL, "DACR" },
449 
450 	{ "SPK_LN", NULL, "Speaker Output" },
451 	{ "SPK_LP", NULL, "Speaker Output" },
452 	{ "SPK_RN", NULL, "Speaker Output" },
453 	{ "SPK_RP", NULL, "Speaker Output" },
454 
455 	{ "Speaker Output", NULL, "DACL" },
456 	{ "Speaker Output", NULL, "DACR" },
457 
458 	{ "ADCL", NULL, "Left Input" },
459 	{ "ADCL", NULL, "CLK_DSP" },
460 	{ "ADCR", NULL, "Right Input" },
461 	{ "ADCR", NULL, "CLK_DSP" },
462 
463 	{ "Left Input", NULL, "LINPUT" },
464 	{ "Right Input", NULL, "RINPUT" },
465 
466 };
467 
468 /* Values for CLK_SYS_RATE */
469 static struct {
470 	int ratio;
471 	u16 val;
472 } wm8961_clk_sys_ratio[] = {
473 	{  64,  0 },
474 	{  128, 1 },
475 	{  192, 2 },
476 	{  256, 3 },
477 	{  384, 4 },
478 	{  512, 5 },
479 	{  768, 6 },
480 	{ 1024, 7 },
481 	{ 1408, 8 },
482 	{ 1536, 9 },
483 };
484 
485 /* Values for SAMPLE_RATE */
486 static struct {
487 	int rate;
488 	u16 val;
489 } wm8961_srate[] = {
490 	{ 48000, 0 },
491 	{ 44100, 0 },
492 	{ 32000, 1 },
493 	{ 22050, 2 },
494 	{ 24000, 2 },
495 	{ 16000, 3 },
496 	{ 11250, 4 },
497 	{ 12000, 4 },
498 	{  8000, 5 },
499 };
500 
wm8961_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)501 static int wm8961_hw_params(struct snd_pcm_substream *substream,
502 			    struct snd_pcm_hw_params *params,
503 			    struct snd_soc_dai *dai)
504 {
505 	struct snd_soc_component *component = dai->component;
506 	struct wm8961_priv *wm8961 = snd_soc_component_get_drvdata(component);
507 	int i, best, target, fs;
508 	u16 reg;
509 
510 	fs = params_rate(params);
511 
512 	if (!wm8961->sysclk) {
513 		dev_err(component->dev, "MCLK has not been specified\n");
514 		return -EINVAL;
515 	}
516 
517 	/* Find the closest sample rate for the filters */
518 	best = 0;
519 	for (i = 0; i < ARRAY_SIZE(wm8961_srate); i++) {
520 		if (abs(wm8961_srate[i].rate - fs) <
521 		    abs(wm8961_srate[best].rate - fs))
522 			best = i;
523 	}
524 	reg = snd_soc_component_read(component, WM8961_ADDITIONAL_CONTROL_3);
525 	reg &= ~WM8961_SAMPLE_RATE_MASK;
526 	reg |= wm8961_srate[best].val;
527 	snd_soc_component_write(component, WM8961_ADDITIONAL_CONTROL_3, reg);
528 	dev_dbg(component->dev, "Selected SRATE %dHz for %dHz\n",
529 		wm8961_srate[best].rate, fs);
530 
531 	/* Select a CLK_SYS/fs ratio equal to or higher than required */
532 	target = wm8961->sysclk / fs;
533 
534 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && target < 64) {
535 		dev_err(component->dev,
536 			"SYSCLK must be at least 64*fs for DAC\n");
537 		return -EINVAL;
538 	}
539 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE && target < 256) {
540 		dev_err(component->dev,
541 			"SYSCLK must be at least 256*fs for ADC\n");
542 		return -EINVAL;
543 	}
544 
545 	for (i = 0; i < ARRAY_SIZE(wm8961_clk_sys_ratio); i++) {
546 		if (wm8961_clk_sys_ratio[i].ratio >= target)
547 			break;
548 	}
549 	if (i == ARRAY_SIZE(wm8961_clk_sys_ratio)) {
550 		dev_err(component->dev, "Unable to generate CLK_SYS_RATE\n");
551 		return -EINVAL;
552 	}
553 	dev_dbg(component->dev, "Selected CLK_SYS_RATE of %d for %d/%d=%d\n",
554 		wm8961_clk_sys_ratio[i].ratio, wm8961->sysclk, fs,
555 		wm8961->sysclk / fs);
556 
557 	reg = snd_soc_component_read(component, WM8961_CLOCKING_4);
558 	reg &= ~WM8961_CLK_SYS_RATE_MASK;
559 	reg |= wm8961_clk_sys_ratio[i].val << WM8961_CLK_SYS_RATE_SHIFT;
560 	snd_soc_component_write(component, WM8961_CLOCKING_4, reg);
561 
562 	reg = snd_soc_component_read(component, WM8961_AUDIO_INTERFACE_0);
563 	reg &= ~WM8961_WL_MASK;
564 	switch (params_width(params)) {
565 	case 16:
566 		break;
567 	case 20:
568 		reg |= 1 << WM8961_WL_SHIFT;
569 		break;
570 	case 24:
571 		reg |= 2 << WM8961_WL_SHIFT;
572 		break;
573 	case 32:
574 		reg |= 3 << WM8961_WL_SHIFT;
575 		break;
576 	default:
577 		return -EINVAL;
578 	}
579 	snd_soc_component_write(component, WM8961_AUDIO_INTERFACE_0, reg);
580 
581 	/* Sloping stop-band filter is recommended for <= 24kHz */
582 	reg = snd_soc_component_read(component, WM8961_ADC_DAC_CONTROL_2);
583 	if (fs <= 24000)
584 		reg |= WM8961_DACSLOPE;
585 	else
586 		reg &= ~WM8961_DACSLOPE;
587 	snd_soc_component_write(component, WM8961_ADC_DAC_CONTROL_2, reg);
588 
589 	return 0;
590 }
591 
wm8961_set_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)592 static int wm8961_set_sysclk(struct snd_soc_dai *dai, int clk_id,
593 			     unsigned int freq,
594 			     int dir)
595 {
596 	struct snd_soc_component *component = dai->component;
597 	struct wm8961_priv *wm8961 = snd_soc_component_get_drvdata(component);
598 	u16 reg = snd_soc_component_read(component, WM8961_CLOCKING1);
599 
600 	if (freq > 33000000) {
601 		dev_err(component->dev, "MCLK must be <33MHz\n");
602 		return -EINVAL;
603 	}
604 
605 	if (freq > 16500000) {
606 		dev_dbg(component->dev, "Using MCLK/2 for %dHz MCLK\n", freq);
607 		reg |= WM8961_MCLKDIV;
608 		freq /= 2;
609 	} else {
610 		dev_dbg(component->dev, "Using MCLK/1 for %dHz MCLK\n", freq);
611 		reg &= ~WM8961_MCLKDIV;
612 	}
613 
614 	snd_soc_component_write(component, WM8961_CLOCKING1, reg);
615 
616 	wm8961->sysclk = freq;
617 
618 	return 0;
619 }
620 
wm8961_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)621 static int wm8961_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
622 {
623 	struct snd_soc_component *component = dai->component;
624 	u16 aif = snd_soc_component_read(component, WM8961_AUDIO_INTERFACE_0);
625 
626 	aif &= ~(WM8961_BCLKINV | WM8961_LRP |
627 		 WM8961_MS | WM8961_FORMAT_MASK);
628 
629 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
630 	case SND_SOC_DAIFMT_CBM_CFM:
631 		aif |= WM8961_MS;
632 		break;
633 	case SND_SOC_DAIFMT_CBS_CFS:
634 		break;
635 	default:
636 		return -EINVAL;
637 	}
638 
639 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
640 	case SND_SOC_DAIFMT_RIGHT_J:
641 		break;
642 
643 	case SND_SOC_DAIFMT_LEFT_J:
644 		aif |= 1;
645 		break;
646 
647 	case SND_SOC_DAIFMT_I2S:
648 		aif |= 2;
649 		break;
650 
651 	case SND_SOC_DAIFMT_DSP_B:
652 		aif |= WM8961_LRP;
653 		fallthrough;
654 	case SND_SOC_DAIFMT_DSP_A:
655 		aif |= 3;
656 		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
657 		case SND_SOC_DAIFMT_NB_NF:
658 		case SND_SOC_DAIFMT_IB_NF:
659 			break;
660 		default:
661 			return -EINVAL;
662 		}
663 		break;
664 
665 	default:
666 		return -EINVAL;
667 	}
668 
669 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
670 	case SND_SOC_DAIFMT_NB_NF:
671 		break;
672 	case SND_SOC_DAIFMT_NB_IF:
673 		aif |= WM8961_LRP;
674 		break;
675 	case SND_SOC_DAIFMT_IB_NF:
676 		aif |= WM8961_BCLKINV;
677 		break;
678 	case SND_SOC_DAIFMT_IB_IF:
679 		aif |= WM8961_BCLKINV | WM8961_LRP;
680 		break;
681 	default:
682 		return -EINVAL;
683 	}
684 
685 	return snd_soc_component_write(component, WM8961_AUDIO_INTERFACE_0, aif);
686 }
687 
wm8961_set_tristate(struct snd_soc_dai * dai,int tristate)688 static int wm8961_set_tristate(struct snd_soc_dai *dai, int tristate)
689 {
690 	struct snd_soc_component *component = dai->component;
691 	u16 reg = snd_soc_component_read(component, WM8961_ADDITIONAL_CONTROL_2);
692 
693 	if (tristate)
694 		reg |= WM8961_TRIS;
695 	else
696 		reg &= ~WM8961_TRIS;
697 
698 	return snd_soc_component_write(component, WM8961_ADDITIONAL_CONTROL_2, reg);
699 }
700 
wm8961_mute(struct snd_soc_dai * dai,int mute,int direction)701 static int wm8961_mute(struct snd_soc_dai *dai, int mute, int direction)
702 {
703 	struct snd_soc_component *component = dai->component;
704 	u16 reg = snd_soc_component_read(component, WM8961_ADC_DAC_CONTROL_1);
705 
706 	if (mute)
707 		reg |= WM8961_DACMU;
708 	else
709 		reg &= ~WM8961_DACMU;
710 
711 	msleep(17);
712 
713 	return snd_soc_component_write(component, WM8961_ADC_DAC_CONTROL_1, reg);
714 }
715 
wm8961_set_clkdiv(struct snd_soc_dai * dai,int div_id,int div)716 static int wm8961_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
717 {
718 	struct snd_soc_component *component = dai->component;
719 	u16 reg;
720 
721 	switch (div_id) {
722 	case WM8961_BCLK:
723 		reg = snd_soc_component_read(component, WM8961_CLOCKING2);
724 		reg &= ~WM8961_BCLKDIV_MASK;
725 		reg |= div;
726 		snd_soc_component_write(component, WM8961_CLOCKING2, reg);
727 		break;
728 
729 	case WM8961_LRCLK:
730 		reg = snd_soc_component_read(component, WM8961_AUDIO_INTERFACE_2);
731 		reg &= ~WM8961_LRCLK_RATE_MASK;
732 		reg |= div;
733 		snd_soc_component_write(component, WM8961_AUDIO_INTERFACE_2, reg);
734 		break;
735 
736 	default:
737 		return -EINVAL;
738 	}
739 
740 	return 0;
741 }
742 
wm8961_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)743 static int wm8961_set_bias_level(struct snd_soc_component *component,
744 				 enum snd_soc_bias_level level)
745 {
746 	u16 reg;
747 
748 	/* This is all slightly unusual since we have no bypass paths
749 	 * and the output amplifier structure means we can just slam
750 	 * the biases straight up rather than having to ramp them
751 	 * slowly.
752 	 */
753 	switch (level) {
754 	case SND_SOC_BIAS_ON:
755 		break;
756 
757 	case SND_SOC_BIAS_PREPARE:
758 		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_STANDBY) {
759 			/* Enable bias generation */
760 			reg = snd_soc_component_read(component, WM8961_ANTI_POP);
761 			reg |= WM8961_BUFIOEN | WM8961_BUFDCOPEN;
762 			snd_soc_component_write(component, WM8961_ANTI_POP, reg);
763 
764 			/* VMID=2*50k, VREF */
765 			reg = snd_soc_component_read(component, WM8961_PWR_MGMT_1);
766 			reg &= ~WM8961_VMIDSEL_MASK;
767 			reg |= (1 << WM8961_VMIDSEL_SHIFT) | WM8961_VREF;
768 			snd_soc_component_write(component, WM8961_PWR_MGMT_1, reg);
769 		}
770 		break;
771 
772 	case SND_SOC_BIAS_STANDBY:
773 		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_PREPARE) {
774 			/* VREF off */
775 			reg = snd_soc_component_read(component, WM8961_PWR_MGMT_1);
776 			reg &= ~WM8961_VREF;
777 			snd_soc_component_write(component, WM8961_PWR_MGMT_1, reg);
778 
779 			/* Bias generation off */
780 			reg = snd_soc_component_read(component, WM8961_ANTI_POP);
781 			reg &= ~(WM8961_BUFIOEN | WM8961_BUFDCOPEN);
782 			snd_soc_component_write(component, WM8961_ANTI_POP, reg);
783 
784 			/* VMID off */
785 			reg = snd_soc_component_read(component, WM8961_PWR_MGMT_1);
786 			reg &= ~WM8961_VMIDSEL_MASK;
787 			snd_soc_component_write(component, WM8961_PWR_MGMT_1, reg);
788 		}
789 		break;
790 
791 	case SND_SOC_BIAS_OFF:
792 		break;
793 	}
794 
795 	return 0;
796 }
797 
798 
799 #define WM8961_RATES SNDRV_PCM_RATE_8000_48000
800 
801 #define WM8961_FORMATS \
802 	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
803 	SNDRV_PCM_FMTBIT_S24_LE)
804 
805 static const struct snd_soc_dai_ops wm8961_dai_ops = {
806 	.hw_params = wm8961_hw_params,
807 	.set_sysclk = wm8961_set_sysclk,
808 	.set_fmt = wm8961_set_fmt,
809 	.mute_stream = wm8961_mute,
810 	.set_tristate = wm8961_set_tristate,
811 	.set_clkdiv = wm8961_set_clkdiv,
812 	.no_capture_mute = 1,
813 };
814 
815 static struct snd_soc_dai_driver wm8961_dai = {
816 	.name = "wm8961-hifi",
817 	.playback = {
818 		.stream_name = "HiFi Playback",
819 		.channels_min = 1,
820 		.channels_max = 2,
821 		.rates = WM8961_RATES,
822 		.formats = WM8961_FORMATS,},
823 	.capture = {
824 		.stream_name = "HiFi Capture",
825 		.channels_min = 1,
826 		.channels_max = 2,
827 		.rates = WM8961_RATES,
828 		.formats = WM8961_FORMATS,},
829 	.ops = &wm8961_dai_ops,
830 };
831 
wm8961_probe(struct snd_soc_component * component)832 static int wm8961_probe(struct snd_soc_component *component)
833 {
834 	u16 reg;
835 
836 	/* Enable class W */
837 	reg = snd_soc_component_read(component, WM8961_CHARGE_PUMP_B);
838 	reg |= WM8961_CP_DYN_PWR_MASK;
839 	snd_soc_component_write(component, WM8961_CHARGE_PUMP_B, reg);
840 
841 	/* Latch volume update bits (right channel only, we always
842 	 * write both out) and default ZC on. */
843 	reg = snd_soc_component_read(component, WM8961_ROUT1_VOLUME);
844 	snd_soc_component_write(component, WM8961_ROUT1_VOLUME,
845 		     reg | WM8961_LO1ZC | WM8961_OUT1VU);
846 	snd_soc_component_write(component, WM8961_LOUT1_VOLUME, reg | WM8961_LO1ZC);
847 	reg = snd_soc_component_read(component, WM8961_ROUT2_VOLUME);
848 	snd_soc_component_write(component, WM8961_ROUT2_VOLUME,
849 		     reg | WM8961_SPKRZC | WM8961_SPKVU);
850 	snd_soc_component_write(component, WM8961_LOUT2_VOLUME, reg | WM8961_SPKLZC);
851 
852 	reg = snd_soc_component_read(component, WM8961_RIGHT_ADC_VOLUME);
853 	snd_soc_component_write(component, WM8961_RIGHT_ADC_VOLUME, reg | WM8961_ADCVU);
854 	reg = snd_soc_component_read(component, WM8961_RIGHT_INPUT_VOLUME);
855 	snd_soc_component_write(component, WM8961_RIGHT_INPUT_VOLUME, reg | WM8961_IPVU);
856 
857 	/* Use soft mute by default */
858 	reg = snd_soc_component_read(component, WM8961_ADC_DAC_CONTROL_2);
859 	reg |= WM8961_DACSMM;
860 	snd_soc_component_write(component, WM8961_ADC_DAC_CONTROL_2, reg);
861 
862 	/* Use automatic clocking mode by default; for now this is all
863 	 * we support.
864 	 */
865 	reg = snd_soc_component_read(component, WM8961_CLOCKING_3);
866 	reg &= ~WM8961_MANUAL_MODE;
867 	snd_soc_component_write(component, WM8961_CLOCKING_3, reg);
868 
869 	return 0;
870 }
871 
872 #ifdef CONFIG_PM
873 
wm8961_resume(struct snd_soc_component * component)874 static int wm8961_resume(struct snd_soc_component *component)
875 {
876 	snd_soc_component_cache_sync(component);
877 
878 	return 0;
879 }
880 #else
881 #define wm8961_resume NULL
882 #endif
883 
884 static const struct snd_soc_component_driver soc_component_dev_wm8961 = {
885 	.probe			= wm8961_probe,
886 	.resume			= wm8961_resume,
887 	.set_bias_level		= wm8961_set_bias_level,
888 	.controls		= wm8961_snd_controls,
889 	.num_controls		= ARRAY_SIZE(wm8961_snd_controls),
890 	.dapm_widgets		= wm8961_dapm_widgets,
891 	.num_dapm_widgets	= ARRAY_SIZE(wm8961_dapm_widgets),
892 	.dapm_routes		= audio_paths,
893 	.num_dapm_routes	= ARRAY_SIZE(audio_paths),
894 	.suspend_bias_off	= 1,
895 	.idle_bias_on		= 1,
896 	.use_pmdown_time	= 1,
897 	.endianness		= 1,
898 };
899 
900 static const struct regmap_config wm8961_regmap = {
901 	.reg_bits = 8,
902 	.val_bits = 16,
903 	.max_register = WM8961_MAX_REGISTER,
904 
905 	.reg_defaults = wm8961_reg_defaults,
906 	.num_reg_defaults = ARRAY_SIZE(wm8961_reg_defaults),
907 	.cache_type = REGCACHE_MAPLE,
908 
909 	.volatile_reg = wm8961_volatile,
910 	.readable_reg = wm8961_readable,
911 };
912 
wm8961_i2c_probe(struct i2c_client * i2c)913 static int wm8961_i2c_probe(struct i2c_client *i2c)
914 {
915 	struct wm8961_priv *wm8961;
916 	unsigned int val;
917 	int ret;
918 
919 	wm8961 = devm_kzalloc(&i2c->dev, sizeof(struct wm8961_priv),
920 			      GFP_KERNEL);
921 	if (wm8961 == NULL)
922 		return -ENOMEM;
923 
924 	wm8961->regmap = devm_regmap_init_i2c(i2c, &wm8961_regmap);
925 	if (IS_ERR(wm8961->regmap))
926 		return PTR_ERR(wm8961->regmap);
927 
928 	ret = regmap_read(wm8961->regmap, WM8961_SOFTWARE_RESET, &val);
929 	if (ret != 0) {
930 		dev_err(&i2c->dev, "Failed to read chip ID: %d\n", ret);
931 		return ret;
932 	}
933 
934 	if (val != 0x1801) {
935 		dev_err(&i2c->dev, "Device is not a WM8961: ID=0x%x\n", val);
936 		return -EINVAL;
937 	}
938 
939 	/* This isn't volatile - readback doesn't correspond to write */
940 	regcache_cache_bypass(wm8961->regmap, true);
941 	ret = regmap_read(wm8961->regmap, WM8961_RIGHT_INPUT_VOLUME, &val);
942 	regcache_cache_bypass(wm8961->regmap, false);
943 
944 	if (ret != 0) {
945 		dev_err(&i2c->dev, "Failed to read chip revision: %d\n", ret);
946 		return ret;
947 	}
948 
949 	dev_info(&i2c->dev, "WM8961 family %d revision %c\n",
950 		 (val & WM8961_DEVICE_ID_MASK) >> WM8961_DEVICE_ID_SHIFT,
951 		 ((val & WM8961_CHIP_REV_MASK) >> WM8961_CHIP_REV_SHIFT)
952 		 + 'A');
953 
954 	ret = regmap_write(wm8961->regmap, WM8961_SOFTWARE_RESET, 0x1801);
955 	if (ret != 0) {
956 		dev_err(&i2c->dev, "Failed to issue reset: %d\n", ret);
957 		return ret;
958 	}
959 
960 	i2c_set_clientdata(i2c, wm8961);
961 
962 	ret = devm_snd_soc_register_component(&i2c->dev,
963 			&soc_component_dev_wm8961, &wm8961_dai, 1);
964 
965 	return ret;
966 }
967 
968 static const struct i2c_device_id wm8961_i2c_id[] = {
969 	{ "wm8961", 0 },
970 	{ }
971 };
972 MODULE_DEVICE_TABLE(i2c, wm8961_i2c_id);
973 
974 static const struct of_device_id wm8961_of_match[] __maybe_unused = {
975 	{ .compatible = "wlf,wm8961", },
976 	{ }
977 };
978 MODULE_DEVICE_TABLE(of, wm8961_of_match);
979 
980 static struct i2c_driver wm8961_i2c_driver = {
981 	.driver = {
982 		.name = "wm8961",
983 		.of_match_table = of_match_ptr(wm8961_of_match),
984 	},
985 	.probe = wm8961_i2c_probe,
986 	.id_table = wm8961_i2c_id,
987 };
988 
989 module_i2c_driver(wm8961_i2c_driver);
990 
991 MODULE_DESCRIPTION("ASoC WM8961 driver");
992 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
993 MODULE_LICENSE("GPL");
994