Commit | Line | Data |
---|---|---|
0b5e92c5 JC |
1 | /* |
2 | * wm8940.c -- WM8940 ALSA Soc Audio driver | |
3 | * | |
4 | * Author: Jonathan Cameron <jic23@cam.ac.uk> | |
5 | * | |
6 | * Based on wm8510.c | |
7 | * Copyright 2006 Wolfson Microelectronics PLC. | |
8 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * Not currently handled: | |
15 | * Notch filter control | |
16 | * AUXMode (inverting vs mixer) | |
17 | * No means to obtain current gain if alc enabled. | |
18 | * No use made of gpio | |
19 | * Fast VMID discharge for power down | |
20 | * Soft Start | |
21 | * DLR and ALR Swaps not enabled | |
22 | * Digital Sidetone not supported | |
23 | */ | |
24 | #include <linux/module.h> | |
25 | #include <linux/moduleparam.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/pm.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <linux/platform_device.h> | |
32 | #include <linux/spi/spi.h> | |
33 | #include <sound/core.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/soc.h> | |
37 | #include <sound/soc-dapm.h> | |
38 | #include <sound/initval.h> | |
39 | #include <sound/tlv.h> | |
40 | ||
41 | #include "wm8940.h" | |
42 | ||
43 | struct wm8940_priv { | |
44 | unsigned int sysclk; | |
45 | u16 reg_cache[WM8940_CACHEREGNUM]; | |
46 | struct snd_soc_codec codec; | |
47 | }; | |
48 | ||
49 | static u16 wm8940_reg_defaults[] = { | |
50 | 0x8940, /* Soft Reset */ | |
51 | 0x0000, /* Power 1 */ | |
52 | 0x0000, /* Power 2 */ | |
53 | 0x0000, /* Power 3 */ | |
54 | 0x0010, /* Interface Control */ | |
55 | 0x0000, /* Companding Control */ | |
56 | 0x0140, /* Clock Control */ | |
57 | 0x0000, /* Additional Controls */ | |
58 | 0x0000, /* GPIO Control */ | |
59 | 0x0002, /* Auto Increment Control */ | |
60 | 0x0000, /* DAC Control */ | |
61 | 0x00FF, /* DAC Volume */ | |
62 | 0, | |
63 | 0, | |
64 | 0x0100, /* ADC Control */ | |
65 | 0x00FF, /* ADC Volume */ | |
66 | 0x0000, /* Notch Filter 1 Control 1 */ | |
67 | 0x0000, /* Notch Filter 1 Control 2 */ | |
68 | 0x0000, /* Notch Filter 2 Control 1 */ | |
69 | 0x0000, /* Notch Filter 2 Control 2 */ | |
70 | 0x0000, /* Notch Filter 3 Control 1 */ | |
71 | 0x0000, /* Notch Filter 3 Control 2 */ | |
72 | 0x0000, /* Notch Filter 4 Control 1 */ | |
73 | 0x0000, /* Notch Filter 4 Control 2 */ | |
74 | 0x0032, /* DAC Limit Control 1 */ | |
75 | 0x0000, /* DAC Limit Control 2 */ | |
76 | 0, | |
77 | 0, | |
78 | 0, | |
79 | 0, | |
80 | 0, | |
81 | 0, | |
82 | 0x0038, /* ALC Control 1 */ | |
83 | 0x000B, /* ALC Control 2 */ | |
84 | 0x0032, /* ALC Control 3 */ | |
85 | 0x0000, /* Noise Gate */ | |
86 | 0x0041, /* PLLN */ | |
87 | 0x000C, /* PLLK1 */ | |
88 | 0x0093, /* PLLK2 */ | |
89 | 0x00E9, /* PLLK3 */ | |
90 | 0, | |
91 | 0, | |
92 | 0x0030, /* ALC Control 4 */ | |
93 | 0, | |
94 | 0x0002, /* Input Control */ | |
95 | 0x0050, /* PGA Gain */ | |
96 | 0, | |
97 | 0x0002, /* ADC Boost Control */ | |
98 | 0, | |
99 | 0x0002, /* Output Control */ | |
100 | 0x0000, /* Speaker Mixer Control */ | |
101 | 0, | |
102 | 0, | |
103 | 0, | |
104 | 0x0079, /* Speaker Volume */ | |
105 | 0, | |
106 | 0x0000, /* Mono Mixer Control */ | |
107 | }; | |
108 | ||
109 | static inline unsigned int wm8940_read_reg_cache(struct snd_soc_codec *codec, | |
110 | unsigned int reg) | |
111 | { | |
112 | u16 *cache = codec->reg_cache; | |
113 | ||
114 | if (reg >= ARRAY_SIZE(wm8940_reg_defaults)) | |
115 | return -1; | |
116 | ||
117 | return cache[reg]; | |
118 | } | |
119 | ||
120 | static inline int wm8940_write_reg_cache(struct snd_soc_codec *codec, | |
121 | u16 reg, unsigned int value) | |
122 | { | |
123 | u16 *cache = codec->reg_cache; | |
124 | ||
125 | if (reg >= ARRAY_SIZE(wm8940_reg_defaults)) | |
126 | return -1; | |
127 | ||
128 | cache[reg] = value; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | static int wm8940_write(struct snd_soc_codec *codec, unsigned int reg, | |
134 | unsigned int value) | |
135 | { | |
136 | int ret; | |
137 | u8 data[3] = { reg, | |
138 | (value & 0xff00) >> 8, | |
139 | (value & 0x00ff) | |
140 | }; | |
141 | ||
142 | wm8940_write_reg_cache(codec, reg, value); | |
143 | ||
144 | ret = codec->hw_write(codec->control_data, data, 3); | |
145 | ||
146 | if (ret < 0) | |
147 | return ret; | |
148 | else if (ret != 3) | |
149 | return -EIO; | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" }; | |
154 | static const struct soc_enum wm8940_adc_companding_enum | |
155 | = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding); | |
156 | static const struct soc_enum wm8940_dac_companding_enum | |
157 | = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding); | |
158 | ||
159 | static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"}; | |
160 | static const struct soc_enum wm8940_alc_mode_enum | |
161 | = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text); | |
162 | ||
163 | static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"}; | |
164 | static const struct soc_enum wm8940_mic_bias_level_enum | |
165 | = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text); | |
166 | ||
167 | static const char *wm8940_filter_mode_text[] = {"Audio", "Application"}; | |
168 | static const struct soc_enum wm8940_filter_mode_enum | |
169 | = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text); | |
170 | ||
171 | DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1); | |
172 | DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0); | |
173 | DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0); | |
174 | DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0); | |
175 | DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0); | |
176 | DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0); | |
177 | DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0); | |
178 | DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0); | |
179 | DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1); | |
180 | DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0); | |
181 | ||
182 | static const struct snd_kcontrol_new wm8940_snd_controls[] = { | |
183 | SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL, | |
184 | 6, 1, 0), | |
185 | SOC_ENUM("DAC Companding", wm8940_dac_companding_enum), | |
186 | SOC_ENUM("ADC Companding", wm8940_adc_companding_enum), | |
187 | ||
188 | SOC_ENUM("ALC Mode", wm8940_alc_mode_enum), | |
189 | SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0), | |
190 | SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1, | |
191 | 3, 7, 1, wm8940_alc_max_tlv), | |
192 | SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1, | |
193 | 0, 7, 0, wm8940_alc_min_tlv), | |
194 | SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2, | |
195 | 0, 14, 0, wm8940_alc_tar_tlv), | |
196 | SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0), | |
197 | SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0), | |
198 | SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0), | |
199 | SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0), | |
200 | SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE, | |
201 | 3, 1, 0), | |
202 | SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE, | |
203 | 0, 7, 0), | |
204 | ||
205 | SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0), | |
206 | SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0), | |
207 | SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0), | |
208 | SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2, | |
209 | 4, 9, 1, wm8940_lim_thresh_tlv), | |
210 | SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2, | |
211 | 0, 12, 0, wm8940_lim_boost_tlv), | |
212 | ||
213 | SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0), | |
214 | SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN, | |
215 | 0, 63, 0, wm8940_pga_vol_tlv), | |
216 | SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL, | |
217 | 0, 255, 0, wm8940_adc_tlv), | |
218 | SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL, | |
219 | 0, 255, 0, wm8940_adc_tlv), | |
220 | SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum), | |
221 | SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST, | |
222 | 8, 1, 0, wm8940_capture_boost_vol_tlv), | |
223 | SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL, | |
224 | 0, 63, 0, wm8940_spk_vol_tlv), | |
225 | SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1), | |
226 | ||
227 | SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL, | |
228 | 8, 1, 1, wm8940_att_tlv), | |
229 | SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0), | |
230 | ||
231 | SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1), | |
232 | SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX, | |
233 | 7, 1, 1, wm8940_att_tlv), | |
234 | ||
235 | SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0), | |
236 | SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum), | |
237 | SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0), | |
238 | SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0), | |
239 | SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0), | |
240 | SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0), | |
241 | SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0), | |
242 | }; | |
243 | ||
244 | static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = { | |
245 | SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0), | |
246 | SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0), | |
247 | SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0), | |
248 | }; | |
249 | ||
250 | static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = { | |
251 | SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0), | |
252 | SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0), | |
253 | SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0), | |
254 | }; | |
255 | ||
256 | DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1); | |
257 | static const struct snd_kcontrol_new wm8940_input_boost_controls[] = { | |
258 | SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1), | |
259 | SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST, | |
260 | 0, 7, 0, wm8940_boost_vol_tlv), | |
261 | SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST, | |
262 | 4, 7, 0, wm8940_boost_vol_tlv), | |
263 | }; | |
264 | ||
265 | static const struct snd_kcontrol_new wm8940_micpga_controls[] = { | |
266 | SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0), | |
267 | SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0), | |
268 | SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0), | |
269 | }; | |
270 | ||
271 | static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = { | |
272 | SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0, | |
273 | &wm8940_speaker_mixer_controls[0], | |
274 | ARRAY_SIZE(wm8940_speaker_mixer_controls)), | |
275 | SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0, | |
276 | &wm8940_mono_mixer_controls[0], | |
277 | ARRAY_SIZE(wm8940_mono_mixer_controls)), | |
278 | SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0), | |
279 | ||
280 | SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0), | |
281 | SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0), | |
282 | SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0), | |
283 | SND_SOC_DAPM_OUTPUT("MONOOUT"), | |
284 | SND_SOC_DAPM_OUTPUT("SPKOUTP"), | |
285 | SND_SOC_DAPM_OUTPUT("SPKOUTN"), | |
286 | ||
287 | SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0), | |
288 | SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0), | |
289 | SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0, | |
290 | &wm8940_micpga_controls[0], | |
291 | ARRAY_SIZE(wm8940_micpga_controls)), | |
292 | SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0, | |
293 | &wm8940_input_boost_controls[0], | |
294 | ARRAY_SIZE(wm8940_input_boost_controls)), | |
295 | SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0), | |
296 | ||
297 | SND_SOC_DAPM_INPUT("MICN"), | |
298 | SND_SOC_DAPM_INPUT("MICP"), | |
299 | SND_SOC_DAPM_INPUT("AUX"), | |
300 | }; | |
301 | ||
302 | static const struct snd_soc_dapm_route audio_map[] = { | |
303 | /* Mono output mixer */ | |
304 | {"Mono Mixer", "PCM Playback Switch", "DAC"}, | |
305 | {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, | |
306 | {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, | |
307 | ||
308 | /* Speaker output mixer */ | |
309 | {"Speaker Mixer", "PCM Playback Switch", "DAC"}, | |
310 | {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, | |
311 | {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, | |
312 | ||
313 | /* Outputs */ | |
314 | {"Mono Out", NULL, "Mono Mixer"}, | |
315 | {"MONOOUT", NULL, "Mono Out"}, | |
316 | {"SpkN Out", NULL, "Speaker Mixer"}, | |
317 | {"SpkP Out", NULL, "Speaker Mixer"}, | |
318 | {"SPKOUTN", NULL, "SpkN Out"}, | |
319 | {"SPKOUTP", NULL, "SpkP Out"}, | |
320 | ||
321 | /* Microphone PGA */ | |
322 | {"Mic PGA", "MICN Switch", "MICN"}, | |
323 | {"Mic PGA", "MICP Switch", "MICP"}, | |
324 | {"Mic PGA", "AUX Switch", "AUX"}, | |
325 | ||
326 | /* Boost Mixer */ | |
327 | {"Boost Mixer", "Mic PGA Switch", "Mic PGA"}, | |
328 | {"Boost Mixer", "Mic Volume", "MICP"}, | |
329 | {"Boost Mixer", "Aux Volume", "Aux Input"}, | |
330 | ||
331 | {"ADC", NULL, "Boost Mixer"}, | |
332 | }; | |
333 | ||
334 | static int wm8940_add_widgets(struct snd_soc_codec *codec) | |
335 | { | |
336 | int ret; | |
337 | ||
338 | ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets, | |
339 | ARRAY_SIZE(wm8940_dapm_widgets)); | |
340 | if (ret) | |
341 | goto error_ret; | |
342 | ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); | |
343 | if (ret) | |
344 | goto error_ret; | |
345 | ret = snd_soc_dapm_new_widgets(codec); | |
346 | ||
347 | error_ret: | |
348 | return ret; | |
349 | } | |
350 | ||
351 | #define wm8940_reset(c) wm8940_write(c, WM8940_SOFTRESET, 0); | |
352 | ||
353 | static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
354 | unsigned int fmt) | |
355 | { | |
356 | struct snd_soc_codec *codec = codec_dai->codec; | |
357 | u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFE67; | |
358 | u16 clk = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0x1fe; | |
359 | ||
360 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
361 | case SND_SOC_DAIFMT_CBM_CFM: | |
362 | clk |= 1; | |
363 | break; | |
364 | case SND_SOC_DAIFMT_CBS_CFS: | |
365 | break; | |
366 | default: | |
367 | return -EINVAL; | |
368 | } | |
369 | wm8940_write(codec, WM8940_CLOCK, clk); | |
370 | ||
371 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
372 | case SND_SOC_DAIFMT_I2S: | |
373 | iface |= (2 << 3); | |
374 | break; | |
375 | case SND_SOC_DAIFMT_LEFT_J: | |
376 | iface |= (1 << 3); | |
377 | break; | |
378 | case SND_SOC_DAIFMT_RIGHT_J: | |
379 | break; | |
380 | case SND_SOC_DAIFMT_DSP_A: | |
381 | iface |= (3 << 3); | |
382 | break; | |
383 | case SND_SOC_DAIFMT_DSP_B: | |
384 | iface |= (3 << 3) | (1 << 7); | |
385 | break; | |
386 | } | |
387 | ||
388 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
389 | case SND_SOC_DAIFMT_NB_NF: | |
390 | break; | |
391 | case SND_SOC_DAIFMT_NB_IF: | |
392 | iface |= (1 << 7); | |
393 | break; | |
394 | case SND_SOC_DAIFMT_IB_NF: | |
395 | iface |= (1 << 8); | |
396 | break; | |
397 | case SND_SOC_DAIFMT_IB_IF: | |
398 | iface |= (1 << 8) | (1 << 7); | |
399 | break; | |
400 | } | |
401 | ||
402 | wm8940_write(codec, WM8940_IFACE, iface); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream, | |
408 | struct snd_pcm_hw_params *params, | |
409 | struct snd_soc_dai *dai) | |
410 | { | |
411 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
412 | struct snd_soc_device *socdev = rtd->socdev; | |
413 | struct snd_soc_codec *codec = socdev->card->codec; | |
414 | u16 iface = wm8940_read_reg_cache(codec, WM8940_IFACE) & 0xFD9F; | |
415 | u16 addcntrl = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFF1; | |
416 | u16 companding = wm8940_read_reg_cache(codec, | |
417 | WM8940_COMPANDINGCTL) & 0xFFDF; | |
418 | int ret; | |
419 | ||
420 | /* LoutR control */ | |
421 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE | |
422 | && params_channels(params) == 2) | |
423 | iface |= (1 << 9); | |
424 | ||
425 | switch (params_rate(params)) { | |
426 | case SNDRV_PCM_RATE_8000: | |
427 | addcntrl |= (0x5 << 1); | |
428 | break; | |
429 | case SNDRV_PCM_RATE_11025: | |
430 | addcntrl |= (0x4 << 1); | |
431 | break; | |
432 | case SNDRV_PCM_RATE_16000: | |
433 | addcntrl |= (0x3 << 1); | |
434 | break; | |
435 | case SNDRV_PCM_RATE_22050: | |
436 | addcntrl |= (0x2 << 1); | |
437 | break; | |
438 | case SNDRV_PCM_RATE_32000: | |
439 | addcntrl |= (0x1 << 1); | |
440 | break; | |
441 | case SNDRV_PCM_RATE_44100: | |
442 | case SNDRV_PCM_RATE_48000: | |
443 | break; | |
444 | } | |
445 | ret = wm8940_write(codec, WM8940_ADDCNTRL, addcntrl); | |
446 | if (ret) | |
447 | goto error_ret; | |
448 | ||
449 | switch (params_format(params)) { | |
450 | case SNDRV_PCM_FORMAT_S8: | |
451 | companding = companding | (1 << 5); | |
452 | break; | |
453 | case SNDRV_PCM_FORMAT_S16_LE: | |
454 | break; | |
455 | case SNDRV_PCM_FORMAT_S20_3LE: | |
456 | iface |= (1 << 5); | |
457 | break; | |
458 | case SNDRV_PCM_FORMAT_S24_LE: | |
459 | iface |= (2 << 5); | |
460 | break; | |
461 | case SNDRV_PCM_FORMAT_S32_LE: | |
462 | iface |= (3 << 5); | |
463 | break; | |
464 | } | |
465 | ret = wm8940_write(codec, WM8940_COMPANDINGCTL, companding); | |
466 | if (ret) | |
467 | goto error_ret; | |
468 | ret = wm8940_write(codec, WM8940_IFACE, iface); | |
469 | ||
470 | error_ret: | |
471 | return ret; | |
472 | } | |
473 | ||
474 | static int wm8940_mute(struct snd_soc_dai *dai, int mute) | |
475 | { | |
476 | struct snd_soc_codec *codec = dai->codec; | |
477 | u16 mute_reg = wm8940_read_reg_cache(codec, WM8940_DAC) & 0xffbf; | |
478 | ||
479 | if (mute) | |
480 | mute_reg |= 0x40; | |
481 | ||
482 | return wm8940_write(codec, WM8940_DAC, mute_reg); | |
483 | } | |
484 | ||
485 | static int wm8940_set_bias_level(struct snd_soc_codec *codec, | |
486 | enum snd_soc_bias_level level) | |
487 | { | |
488 | u16 val; | |
489 | u16 pwr_reg = wm8940_read_reg_cache(codec, WM8940_POWER1) & 0x1F0; | |
490 | int ret = 0; | |
491 | ||
492 | switch (level) { | |
493 | case SND_SOC_BIAS_ON: | |
494 | /* ensure bufioen and biasen */ | |
495 | pwr_reg |= (1 << 2) | (1 << 3); | |
496 | /* Enable thermal shutdown */ | |
497 | val = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL); | |
498 | ret = wm8940_write(codec, WM8940_OUTPUTCTL, val | 0x2); | |
499 | if (ret) | |
500 | break; | |
501 | /* set vmid to 75k */ | |
502 | ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1); | |
503 | break; | |
504 | case SND_SOC_BIAS_PREPARE: | |
505 | /* ensure bufioen and biasen */ | |
506 | pwr_reg |= (1 << 2) | (1 << 3); | |
507 | ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x1); | |
508 | break; | |
509 | case SND_SOC_BIAS_STANDBY: | |
510 | /* ensure bufioen and biasen */ | |
511 | pwr_reg |= (1 << 2) | (1 << 3); | |
512 | /* set vmid to 300k for standby */ | |
513 | ret = wm8940_write(codec, WM8940_POWER1, pwr_reg | 0x2); | |
514 | break; | |
515 | case SND_SOC_BIAS_OFF: | |
516 | ret = wm8940_write(codec, WM8940_POWER1, pwr_reg); | |
517 | break; | |
518 | } | |
519 | ||
520 | return ret; | |
521 | } | |
522 | ||
523 | struct pll_ { | |
524 | unsigned int pre_scale:2; | |
525 | unsigned int n:4; | |
526 | unsigned int k; | |
527 | }; | |
528 | ||
529 | static struct pll_ pll_div; | |
530 | ||
531 | /* The size in bits of the pll divide multiplied by 10 | |
532 | * to allow rounding later */ | |
533 | #define FIXED_PLL_SIZE ((1 << 24) * 10) | |
534 | static void pll_factors(unsigned int target, unsigned int source) | |
535 | { | |
536 | unsigned long long Kpart; | |
537 | unsigned int K, Ndiv, Nmod; | |
538 | /* The left shift ist to avoid accuracy loss when right shifting */ | |
539 | Ndiv = target / source; | |
540 | ||
541 | if (Ndiv > 12) { | |
542 | source <<= 1; | |
543 | /* Multiply by 2 */ | |
544 | pll_div.pre_scale = 0; | |
545 | Ndiv = target / source; | |
546 | } else if (Ndiv < 3) { | |
547 | source >>= 2; | |
548 | /* Divide by 4 */ | |
549 | pll_div.pre_scale = 3; | |
550 | Ndiv = target / source; | |
551 | } else if (Ndiv < 6) { | |
552 | source >>= 1; | |
553 | /* divide by 2 */ | |
554 | pll_div.pre_scale = 2; | |
555 | Ndiv = target / source; | |
556 | } else | |
557 | pll_div.pre_scale = 1; | |
558 | ||
559 | if ((Ndiv < 6) || (Ndiv > 12)) | |
560 | printk(KERN_WARNING | |
561 | "WM8940 N value %d outwith recommended range!d\n", | |
562 | Ndiv); | |
563 | ||
564 | pll_div.n = Ndiv; | |
565 | Nmod = target % source; | |
566 | Kpart = FIXED_PLL_SIZE * (long long)Nmod; | |
567 | ||
568 | do_div(Kpart, source); | |
569 | ||
570 | K = Kpart & 0xFFFFFFFF; | |
571 | ||
572 | /* Check if we need to round */ | |
573 | if ((K % 10) >= 5) | |
574 | K += 5; | |
575 | ||
576 | /* Move down to proper range now rounding is done */ | |
577 | K /= 10; | |
578 | ||
579 | pll_div.k = K; | |
580 | } | |
581 | ||
582 | /* Untested at the moment */ | |
583 | static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, | |
584 | int pll_id, unsigned int freq_in, unsigned int freq_out) | |
585 | { | |
586 | struct snd_soc_codec *codec = codec_dai->codec; | |
587 | u16 reg; | |
588 | ||
589 | /* Turn off PLL */ | |
590 | reg = wm8940_read_reg_cache(codec, WM8940_POWER1); | |
591 | wm8940_write(codec, WM8940_POWER1, reg & 0x1df); | |
592 | ||
593 | if (freq_in == 0 || freq_out == 0) { | |
594 | /* Clock CODEC directly from MCLK */ | |
595 | reg = wm8940_read_reg_cache(codec, WM8940_CLOCK); | |
596 | wm8940_write(codec, WM8940_CLOCK, reg & 0x0ff); | |
597 | /* Pll power down */ | |
598 | wm8940_write(codec, WM8940_PLLN, (1 << 7)); | |
599 | return 0; | |
600 | } | |
601 | ||
602 | /* Pll is followed by a frequency divide by 4 */ | |
603 | pll_factors(freq_out*4, freq_in); | |
604 | if (pll_div.k) | |
605 | wm8940_write(codec, WM8940_PLLN, | |
606 | (pll_div.pre_scale << 4) | pll_div.n | (1 << 6)); | |
607 | else /* No factional component */ | |
608 | wm8940_write(codec, WM8940_PLLN, | |
609 | (pll_div.pre_scale << 4) | pll_div.n); | |
610 | wm8940_write(codec, WM8940_PLLK1, pll_div.k >> 18); | |
611 | wm8940_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff); | |
612 | wm8940_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff); | |
613 | /* Enable the PLL */ | |
614 | reg = wm8940_read_reg_cache(codec, WM8940_POWER1); | |
615 | wm8940_write(codec, WM8940_POWER1, reg | 0x020); | |
616 | ||
617 | /* Run CODEC from PLL instead of MCLK */ | |
618 | reg = wm8940_read_reg_cache(codec, WM8940_CLOCK); | |
619 | wm8940_write(codec, WM8940_CLOCK, reg | 0x100); | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
625 | int clk_id, unsigned int freq, int dir) | |
626 | { | |
627 | struct snd_soc_codec *codec = codec_dai->codec; | |
628 | struct wm8940_priv *wm8940 = codec->private_data; | |
629 | ||
630 | switch (freq) { | |
631 | case 11289600: | |
632 | case 12000000: | |
633 | case 12288000: | |
634 | case 16934400: | |
635 | case 18432000: | |
636 | wm8940->sysclk = freq; | |
637 | return 0; | |
638 | } | |
639 | return -EINVAL; | |
640 | } | |
641 | ||
642 | static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai, | |
643 | int div_id, int div) | |
644 | { | |
645 | struct snd_soc_codec *codec = codec_dai->codec; | |
646 | u16 reg; | |
647 | int ret = 0; | |
648 | ||
649 | switch (div_id) { | |
650 | case WM8940_BCLKDIV: | |
651 | reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFFEF3; | |
652 | ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 2)); | |
653 | break; | |
654 | case WM8940_MCLKDIV: | |
655 | reg = wm8940_read_reg_cache(codec, WM8940_CLOCK) & 0xFF1F; | |
656 | ret = wm8940_write(codec, WM8940_CLOCK, reg | (div << 5)); | |
657 | break; | |
658 | case WM8940_OPCLKDIV: | |
659 | reg = wm8940_read_reg_cache(codec, WM8940_ADDCNTRL) & 0xFFCF; | |
660 | ret = wm8940_write(codec, WM8940_ADDCNTRL, reg | (div << 4)); | |
661 | break; | |
662 | } | |
663 | return ret; | |
664 | } | |
665 | ||
666 | #define WM8940_RATES SNDRV_PCM_RATE_8000_48000 | |
667 | ||
668 | #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ | |
669 | SNDRV_PCM_FMTBIT_S16_LE | \ | |
670 | SNDRV_PCM_FMTBIT_S20_3LE | \ | |
671 | SNDRV_PCM_FMTBIT_S24_LE | \ | |
672 | SNDRV_PCM_FMTBIT_S32_LE) | |
673 | ||
674 | static struct snd_soc_dai_ops wm8940_dai_ops = { | |
675 | .hw_params = wm8940_i2s_hw_params, | |
676 | .set_sysclk = wm8940_set_dai_sysclk, | |
677 | .digital_mute = wm8940_mute, | |
678 | .set_fmt = wm8940_set_dai_fmt, | |
679 | .set_clkdiv = wm8940_set_dai_clkdiv, | |
680 | .set_pll = wm8940_set_dai_pll, | |
681 | }; | |
682 | ||
683 | struct snd_soc_dai wm8940_dai = { | |
684 | .name = "WM8940", | |
685 | .playback = { | |
686 | .stream_name = "Playback", | |
687 | .channels_min = 1, | |
688 | .channels_max = 2, | |
689 | .rates = WM8940_RATES, | |
690 | .formats = WM8940_FORMATS, | |
691 | }, | |
692 | .capture = { | |
693 | .stream_name = "Capture", | |
694 | .channels_min = 1, | |
695 | .channels_max = 2, | |
696 | .rates = WM8940_RATES, | |
697 | .formats = WM8940_FORMATS, | |
698 | }, | |
699 | .ops = &wm8940_dai_ops, | |
700 | .symmetric_rates = 1, | |
701 | }; | |
702 | EXPORT_SYMBOL_GPL(wm8940_dai); | |
703 | ||
704 | static int wm8940_suspend(struct platform_device *pdev, pm_message_t state) | |
705 | { | |
706 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
707 | struct snd_soc_codec *codec = socdev->card->codec; | |
708 | ||
709 | return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
710 | } | |
711 | ||
712 | static int wm8940_resume(struct platform_device *pdev) | |
713 | { | |
714 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
715 | struct snd_soc_codec *codec = socdev->card->codec; | |
716 | int i; | |
717 | int ret; | |
718 | u8 data[3]; | |
719 | u16 *cache = codec->reg_cache; | |
720 | ||
721 | /* Sync reg_cache with the hardware | |
722 | * Could use auto incremented writes to speed this up | |
723 | */ | |
724 | for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) { | |
725 | data[0] = i; | |
726 | data[1] = (cache[i] & 0xFF00) >> 8; | |
727 | data[2] = cache[i] & 0x00FF; | |
728 | ret = codec->hw_write(codec->control_data, data, 3); | |
729 | if (ret < 0) | |
730 | goto error_ret; | |
731 | else if (ret != 3) { | |
732 | ret = -EIO; | |
733 | goto error_ret; | |
734 | } | |
735 | } | |
736 | ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
737 | if (ret) | |
738 | goto error_ret; | |
739 | ret = wm8940_set_bias_level(codec, codec->suspend_bias_level); | |
740 | ||
741 | error_ret: | |
742 | return ret; | |
743 | } | |
744 | ||
745 | static struct snd_soc_codec *wm8940_codec; | |
746 | ||
747 | static int wm8940_probe(struct platform_device *pdev) | |
748 | { | |
749 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
750 | struct snd_soc_codec *codec; | |
751 | ||
752 | int ret = 0; | |
753 | ||
754 | if (wm8940_codec == NULL) { | |
755 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
756 | return -ENODEV; | |
757 | } | |
758 | ||
759 | socdev->card->codec = wm8940_codec; | |
760 | codec = wm8940_codec; | |
761 | ||
762 | mutex_init(&codec->mutex); | |
763 | /* register pcms */ | |
764 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
765 | if (ret < 0) { | |
766 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
767 | goto pcm_err; | |
768 | } | |
769 | ||
770 | ret = snd_soc_add_controls(codec, wm8940_snd_controls, | |
771 | ARRAY_SIZE(wm8940_snd_controls)); | |
772 | if (ret) | |
773 | goto error_free_pcms; | |
774 | ret = wm8940_add_widgets(codec); | |
775 | if (ret) | |
776 | goto error_free_pcms; | |
777 | ||
778 | ret = snd_soc_init_card(socdev); | |
779 | if (ret < 0) { | |
780 | dev_err(codec->dev, "failed to register card: %d\n", ret); | |
781 | goto error_free_pcms; | |
782 | } | |
783 | ||
784 | return ret; | |
785 | ||
786 | error_free_pcms: | |
787 | snd_soc_free_pcms(socdev); | |
788 | snd_soc_dapm_free(socdev); | |
789 | pcm_err: | |
790 | return ret; | |
791 | } | |
792 | ||
793 | static int wm8940_remove(struct platform_device *pdev) | |
794 | { | |
795 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
796 | ||
797 | snd_soc_free_pcms(socdev); | |
798 | snd_soc_dapm_free(socdev); | |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | struct snd_soc_codec_device soc_codec_dev_wm8940 = { | |
804 | .probe = wm8940_probe, | |
805 | .remove = wm8940_remove, | |
806 | .suspend = wm8940_suspend, | |
807 | .resume = wm8940_resume, | |
808 | }; | |
809 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940); | |
810 | ||
811 | static int wm8940_register(struct wm8940_priv *wm8940) | |
812 | { | |
813 | struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data; | |
814 | struct snd_soc_codec *codec = &wm8940->codec; | |
815 | int ret; | |
816 | u16 reg; | |
817 | if (wm8940_codec) { | |
818 | dev_err(codec->dev, "Another WM8940 is registered\n"); | |
819 | return -EINVAL; | |
820 | } | |
821 | ||
822 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
823 | INIT_LIST_HEAD(&codec->dapm_paths); | |
824 | ||
825 | codec->private_data = wm8940; | |
826 | codec->name = "WM8940"; | |
827 | codec->owner = THIS_MODULE; | |
828 | codec->read = wm8940_read_reg_cache; | |
829 | codec->write = wm8940_write; | |
830 | codec->bias_level = SND_SOC_BIAS_OFF; | |
831 | codec->set_bias_level = wm8940_set_bias_level; | |
832 | codec->dai = &wm8940_dai; | |
833 | codec->num_dai = 1; | |
834 | codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults); | |
835 | codec->reg_cache = &wm8940->reg_cache; | |
836 | ||
837 | memcpy(codec->reg_cache, wm8940_reg_defaults, | |
838 | sizeof(wm8940_reg_defaults)); | |
839 | ||
840 | ret = wm8940_reset(codec); | |
841 | if (ret < 0) { | |
842 | dev_err(codec->dev, "Failed to issue reset\n"); | |
843 | return ret; | |
844 | } | |
845 | ||
846 | wm8940_dai.dev = codec->dev; | |
847 | ||
848 | wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
849 | ||
850 | ret = wm8940_write(codec, WM8940_POWER1, 0x180); | |
851 | if (ret < 0) | |
852 | return ret; | |
853 | ||
854 | if (!pdata) | |
855 | dev_warn(codec->dev, "No platform data supplied\n"); | |
856 | else { | |
857 | reg = wm8940_read_reg_cache(codec, WM8940_OUTPUTCTL); | |
858 | ret = wm8940_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi); | |
859 | if (ret < 0) | |
860 | return ret; | |
861 | } | |
862 | ||
863 | ||
864 | wm8940_codec = codec; | |
865 | ||
866 | ret = snd_soc_register_codec(codec); | |
867 | if (ret) { | |
868 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
869 | return ret; | |
870 | } | |
871 | ||
872 | ret = snd_soc_register_dai(&wm8940_dai); | |
873 | if (ret) { | |
874 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
875 | snd_soc_unregister_codec(codec); | |
876 | return ret; | |
877 | } | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | static void wm8940_unregister(struct wm8940_priv *wm8940) | |
883 | { | |
884 | wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF); | |
885 | snd_soc_unregister_dai(&wm8940_dai); | |
886 | snd_soc_unregister_codec(&wm8940->codec); | |
887 | kfree(wm8940); | |
888 | wm8940_codec = NULL; | |
889 | } | |
890 | ||
891 | static int wm8940_i2c_probe(struct i2c_client *i2c, | |
892 | const struct i2c_device_id *id) | |
893 | { | |
894 | struct wm8940_priv *wm8940; | |
895 | struct snd_soc_codec *codec; | |
896 | ||
897 | wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL); | |
898 | if (wm8940 == NULL) | |
899 | return -ENOMEM; | |
900 | ||
901 | codec = &wm8940->codec; | |
902 | codec->hw_write = (hw_write_t)i2c_master_send; | |
903 | i2c_set_clientdata(i2c, wm8940); | |
904 | codec->control_data = i2c; | |
905 | codec->dev = &i2c->dev; | |
906 | ||
907 | return wm8940_register(wm8940); | |
908 | } | |
909 | ||
910 | static int wm8940_i2c_remove(struct i2c_client *client) | |
911 | { | |
912 | struct wm8940_priv *wm8940 = i2c_get_clientdata(client); | |
913 | ||
914 | wm8940_unregister(wm8940); | |
915 | ||
916 | return 0; | |
917 | } | |
918 | ||
919 | static const struct i2c_device_id wm8940_i2c_id[] = { | |
920 | { "wm8940", 0 }, | |
921 | { } | |
922 | }; | |
923 | MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id); | |
924 | ||
925 | static struct i2c_driver wm8940_i2c_driver = { | |
926 | .driver = { | |
927 | .name = "WM8940 I2C Codec", | |
928 | .owner = THIS_MODULE, | |
929 | }, | |
930 | .probe = wm8940_i2c_probe, | |
931 | .remove = __devexit_p(wm8940_i2c_remove), | |
932 | .id_table = wm8940_i2c_id, | |
933 | }; | |
934 | ||
935 | static int __init wm8940_modinit(void) | |
936 | { | |
937 | int ret; | |
938 | ||
939 | ret = i2c_add_driver(&wm8940_i2c_driver); | |
940 | if (ret) | |
941 | printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n", | |
942 | ret); | |
943 | return ret; | |
944 | } | |
945 | module_init(wm8940_modinit); | |
946 | ||
947 | static void __exit wm8940_exit(void) | |
948 | { | |
949 | i2c_del_driver(&wm8940_i2c_driver); | |
950 | } | |
951 | module_exit(wm8940_exit); | |
952 | ||
953 | MODULE_DESCRIPTION("ASoC WM8940 driver"); | |
954 | MODULE_AUTHOR("Jonathan Cameron"); | |
955 | MODULE_LICENSE("GPL"); |