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Alexander Sverdlin67b22512011-01-19 21:22:06 +03001/*
2 * CS4271 ASoC codec driver
3 *
4 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * This driver support CS4271 codec being master or slave, working
17 * in control port mode, connected either via SPI or I2C.
18 * The data format accepted is I2S or left-justified.
19 * DAPM support not implemented.
20 */
21
22#include <linux/module.h>
23#include <linux/slab.h>
24#include <linux/delay.h>
25#include <sound/pcm.h>
26#include <sound/soc.h>
27#include <sound/tlv.h>
28#include <linux/gpio.h>
29#include <linux/i2c.h>
30#include <linux/spi/spi.h>
31#include <sound/cs4271.h>
32
33#define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
34 SNDRV_PCM_FMTBIT_S24_LE | \
35 SNDRV_PCM_FMTBIT_S32_LE)
Alexander Sverdlin383f8462011-03-07 20:29:36 +030036#define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000
Alexander Sverdlin67b22512011-01-19 21:22:06 +030037
38/*
39 * CS4271 registers
40 * High byte represents SPI chip address (0x10) + write command (0)
41 * Low byte - codec register address
42 */
43#define CS4271_MODE1 0x2001 /* Mode Control 1 */
44#define CS4271_DACCTL 0x2002 /* DAC Control */
45#define CS4271_DACVOL 0x2003 /* DAC Volume & Mixing Control */
46#define CS4271_VOLA 0x2004 /* DAC Channel A Volume Control */
47#define CS4271_VOLB 0x2005 /* DAC Channel B Volume Control */
48#define CS4271_ADCCTL 0x2006 /* ADC Control */
49#define CS4271_MODE2 0x2007 /* Mode Control 2 */
50#define CS4271_CHIPID 0x2008 /* Chip ID */
51
52#define CS4271_FIRSTREG CS4271_MODE1
53#define CS4271_LASTREG CS4271_MODE2
54#define CS4271_NR_REGS ((CS4271_LASTREG & 0xFF) + 1)
55
56/* Bit masks for the CS4271 registers */
57#define CS4271_MODE1_MODE_MASK 0xC0
58#define CS4271_MODE1_MODE_1X 0x00
59#define CS4271_MODE1_MODE_2X 0x80
60#define CS4271_MODE1_MODE_4X 0xC0
61
62#define CS4271_MODE1_DIV_MASK 0x30
63#define CS4271_MODE1_DIV_1 0x00
64#define CS4271_MODE1_DIV_15 0x10
65#define CS4271_MODE1_DIV_2 0x20
66#define CS4271_MODE1_DIV_3 0x30
67
68#define CS4271_MODE1_MASTER 0x08
69
70#define CS4271_MODE1_DAC_DIF_MASK 0x07
71#define CS4271_MODE1_DAC_DIF_LJ 0x00
72#define CS4271_MODE1_DAC_DIF_I2S 0x01
73#define CS4271_MODE1_DAC_DIF_RJ16 0x02
74#define CS4271_MODE1_DAC_DIF_RJ24 0x03
75#define CS4271_MODE1_DAC_DIF_RJ20 0x04
76#define CS4271_MODE1_DAC_DIF_RJ18 0x05
77
78#define CS4271_DACCTL_AMUTE 0x80
79#define CS4271_DACCTL_IF_SLOW 0x40
80
81#define CS4271_DACCTL_DEM_MASK 0x30
82#define CS4271_DACCTL_DEM_DIS 0x00
83#define CS4271_DACCTL_DEM_441 0x10
84#define CS4271_DACCTL_DEM_48 0x20
85#define CS4271_DACCTL_DEM_32 0x30
86
87#define CS4271_DACCTL_SVRU 0x08
88#define CS4271_DACCTL_SRD 0x04
89#define CS4271_DACCTL_INVA 0x02
90#define CS4271_DACCTL_INVB 0x01
91
92#define CS4271_DACVOL_BEQUA 0x40
93#define CS4271_DACVOL_SOFT 0x20
94#define CS4271_DACVOL_ZEROC 0x10
95
96#define CS4271_DACVOL_ATAPI_MASK 0x0F
97#define CS4271_DACVOL_ATAPI_M_M 0x00
98#define CS4271_DACVOL_ATAPI_M_BR 0x01
99#define CS4271_DACVOL_ATAPI_M_BL 0x02
100#define CS4271_DACVOL_ATAPI_M_BLR2 0x03
101#define CS4271_DACVOL_ATAPI_AR_M 0x04
102#define CS4271_DACVOL_ATAPI_AR_BR 0x05
103#define CS4271_DACVOL_ATAPI_AR_BL 0x06
104#define CS4271_DACVOL_ATAPI_AR_BLR2 0x07
105#define CS4271_DACVOL_ATAPI_AL_M 0x08
106#define CS4271_DACVOL_ATAPI_AL_BR 0x09
107#define CS4271_DACVOL_ATAPI_AL_BL 0x0A
108#define CS4271_DACVOL_ATAPI_AL_BLR2 0x0B
109#define CS4271_DACVOL_ATAPI_ALR2_M 0x0C
110#define CS4271_DACVOL_ATAPI_ALR2_BR 0x0D
111#define CS4271_DACVOL_ATAPI_ALR2_BL 0x0E
112#define CS4271_DACVOL_ATAPI_ALR2_BLR2 0x0F
113
114#define CS4271_VOLA_MUTE 0x80
115#define CS4271_VOLA_VOL_MASK 0x7F
116#define CS4271_VOLB_MUTE 0x80
117#define CS4271_VOLB_VOL_MASK 0x7F
118
119#define CS4271_ADCCTL_DITHER16 0x20
120
121#define CS4271_ADCCTL_ADC_DIF_MASK 0x10
122#define CS4271_ADCCTL_ADC_DIF_LJ 0x00
123#define CS4271_ADCCTL_ADC_DIF_I2S 0x10
124
125#define CS4271_ADCCTL_MUTEA 0x08
126#define CS4271_ADCCTL_MUTEB 0x04
127#define CS4271_ADCCTL_HPFDA 0x02
128#define CS4271_ADCCTL_HPFDB 0x01
129
130#define CS4271_MODE2_LOOP 0x10
131#define CS4271_MODE2_MUTECAEQUB 0x08
132#define CS4271_MODE2_FREEZE 0x04
133#define CS4271_MODE2_CPEN 0x02
134#define CS4271_MODE2_PDN 0x01
135
136#define CS4271_CHIPID_PART_MASK 0xF0
137#define CS4271_CHIPID_REV_MASK 0x0F
138
139/*
140 * Default CS4271 power-up configuration
141 * Array contains non-existing in hw register at address 0
142 * Array do not include Chip ID, as codec driver does not use
143 * registers read operations at all
144 */
145static const u8 cs4271_dflt_reg[CS4271_NR_REGS] = {
146 0,
147 0,
148 CS4271_DACCTL_AMUTE,
149 CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR,
150 0,
151 0,
152 0,
153 0,
154};
155
156struct cs4271_private {
157 /* SND_SOC_I2C or SND_SOC_SPI */
158 enum snd_soc_control_type bus_type;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300159 unsigned int mclk;
160 bool master;
161 bool deemph;
162 /* Current sample rate for de-emphasis control */
163 int rate;
164 /* GPIO driving Reset pin, if any */
165 int gpio_nreset;
166 /* GPIO that disable serial bus, if any */
167 int gpio_disable;
168};
169
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300170/*
171 * @freq is the desired MCLK rate
172 * MCLK rate should (c) be the sample rate, multiplied by one of the
173 * ratios listed in cs4271_mclk_fs_ratios table
174 */
175static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai,
176 int clk_id, unsigned int freq, int dir)
177{
178 struct snd_soc_codec *codec = codec_dai->codec;
179 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
180
181 cs4271->mclk = freq;
182 return 0;
183}
184
185static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai,
186 unsigned int format)
187{
188 struct snd_soc_codec *codec = codec_dai->codec;
189 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
190 unsigned int val = 0;
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300191 int ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300192
193 switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
194 case SND_SOC_DAIFMT_CBS_CFS:
195 cs4271->master = 0;
196 break;
197 case SND_SOC_DAIFMT_CBM_CFM:
198 cs4271->master = 1;
199 val |= CS4271_MODE1_MASTER;
200 break;
201 default:
202 dev_err(codec->dev, "Invalid DAI format\n");
203 return -EINVAL;
204 }
205
206 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
207 case SND_SOC_DAIFMT_LEFT_J:
208 val |= CS4271_MODE1_DAC_DIF_LJ;
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300209 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300210 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300211 if (ret < 0)
212 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300213 break;
214 case SND_SOC_DAIFMT_I2S:
215 val |= CS4271_MODE1_DAC_DIF_I2S;
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300216 ret = snd_soc_update_bits(codec, CS4271_ADCCTL,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300217 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300218 if (ret < 0)
219 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300220 break;
221 default:
222 dev_err(codec->dev, "Invalid DAI format\n");
223 return -EINVAL;
224 }
225
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300226 ret = snd_soc_update_bits(codec, CS4271_MODE1,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300227 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300228 if (ret < 0)
229 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300230 return 0;
231}
232
233static int cs4271_deemph[] = {0, 44100, 48000, 32000};
234
235static int cs4271_set_deemph(struct snd_soc_codec *codec)
236{
237 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300238 int i, ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300239 int val = CS4271_DACCTL_DEM_DIS;
240
241 if (cs4271->deemph) {
242 /* Find closest de-emphasis freq */
243 val = 1;
244 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++)
245 if (abs(cs4271_deemph[i] - cs4271->rate) <
246 abs(cs4271_deemph[val] - cs4271->rate))
247 val = i;
248 val <<= 4;
249 }
250
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300251 ret = snd_soc_update_bits(codec, CS4271_DACCTL,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300252 CS4271_DACCTL_DEM_MASK, val);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300253 if (ret < 0)
254 return ret;
255 return 0;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300256}
257
258static int cs4271_get_deemph(struct snd_kcontrol *kcontrol,
259 struct snd_ctl_elem_value *ucontrol)
260{
261 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
262 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
263
264 ucontrol->value.enumerated.item[0] = cs4271->deemph;
265 return 0;
266}
267
268static int cs4271_put_deemph(struct snd_kcontrol *kcontrol,
269 struct snd_ctl_elem_value *ucontrol)
270{
271 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
272 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
273
274 cs4271->deemph = ucontrol->value.enumerated.item[0];
275 return cs4271_set_deemph(codec);
276}
277
Alexander Sverdlin5c3a12e2011-03-07 20:29:45 +0300278struct cs4271_clk_cfg {
279 bool master; /* codec mode */
280 u8 speed_mode; /* codec speed mode: 1x, 2x, 4x */
281 unsigned short ratio; /* MCLK / sample rate */
282 u8 ratio_mask; /* ratio bit mask for Master mode */
283};
284
285static struct cs4271_clk_cfg cs4271_clk_tab[] = {
286 {1, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1},
287 {1, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_15},
288 {1, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_2},
289 {1, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_3},
290 {1, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1},
291 {1, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_15},
292 {1, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_2},
293 {1, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_3},
294 {1, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1},
295 {1, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_15},
296 {1, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_2},
297 {1, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_3},
298 {0, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1},
299 {0, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_1},
300 {0, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_1},
301 {0, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_2},
302 {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2},
303 {0, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1},
304 {0, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_1},
305 {0, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_1},
306 {0, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_2},
307 {0, CS4271_MODE1_MODE_2X, 512, CS4271_MODE1_DIV_2},
308 {0, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1},
309 {0, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_1},
310 {0, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_1},
311 {0, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_2},
312 {0, CS4271_MODE1_MODE_4X, 256, CS4271_MODE1_DIV_2},
313};
314
315#define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab)
316
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300317static int cs4271_hw_params(struct snd_pcm_substream *substream,
318 struct snd_pcm_hw_params *params,
319 struct snd_soc_dai *dai)
320{
321 struct snd_soc_pcm_runtime *rtd = substream->private_data;
322 struct snd_soc_codec *codec = rtd->codec;
323 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300324 int i, ret;
325 unsigned int ratio, val;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300326
327 cs4271->rate = params_rate(params);
Alexander Sverdlin5c3a12e2011-03-07 20:29:45 +0300328
329 /* Configure DAC */
330 if (cs4271->rate < 50000)
331 val = CS4271_MODE1_MODE_1X;
332 else if (cs4271->rate < 100000)
333 val = CS4271_MODE1_MODE_2X;
334 else
335 val = CS4271_MODE1_MODE_4X;
336
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300337 ratio = cs4271->mclk / cs4271->rate;
338 for (i = 0; i < CS4171_NR_RATIOS; i++)
Alexander Sverdlin5c3a12e2011-03-07 20:29:45 +0300339 if ((cs4271_clk_tab[i].master == cs4271->master) &&
340 (cs4271_clk_tab[i].speed_mode == val) &&
341 (cs4271_clk_tab[i].ratio == ratio))
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300342 break;
343
Alexander Sverdlin5c3a12e2011-03-07 20:29:45 +0300344 if (i == CS4171_NR_RATIOS) {
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300345 dev_err(codec->dev, "Invalid sample rate\n");
346 return -EINVAL;
347 }
348
Alexander Sverdlin5c3a12e2011-03-07 20:29:45 +0300349 val |= cs4271_clk_tab[i].ratio_mask;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300350
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300351 ret = snd_soc_update_bits(codec, CS4271_MODE1,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300352 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300353 if (ret < 0)
354 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300355
356 return cs4271_set_deemph(codec);
357}
358
359static int cs4271_digital_mute(struct snd_soc_dai *dai, int mute)
360{
361 struct snd_soc_codec *codec = dai->codec;
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300362 int ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300363 int val_a = 0;
364 int val_b = 0;
365
366 if (mute) {
367 val_a = CS4271_VOLA_MUTE;
368 val_b = CS4271_VOLB_MUTE;
369 }
370
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300371 ret = snd_soc_update_bits(codec, CS4271_VOLA, CS4271_VOLA_MUTE, val_a);
372 if (ret < 0)
373 return ret;
374 ret = snd_soc_update_bits(codec, CS4271_VOLB, CS4271_VOLB_MUTE, val_b);
375 if (ret < 0)
376 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300377
378 return 0;
379}
380
381/* CS4271 controls */
382static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0);
383
384static const struct snd_kcontrol_new cs4271_snd_controls[] = {
385 SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB,
386 0, 0x7F, 1, cs4271_dac_tlv),
387 SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0),
388 SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0),
389 SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0),
390 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,
391 cs4271_get_deemph, cs4271_put_deemph),
392 SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0),
393 SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0),
394 SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0),
395 SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0),
396 SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0),
397 SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0),
398 SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1),
399 SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0),
400 SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1),
401 SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB,
402 7, 1, 1),
403};
404
Lars-Peter Clausen85e76522011-11-23 11:40:40 +0100405static const struct snd_soc_dai_ops cs4271_dai_ops = {
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300406 .hw_params = cs4271_hw_params,
407 .set_sysclk = cs4271_set_dai_sysclk,
408 .set_fmt = cs4271_set_dai_fmt,
409 .digital_mute = cs4271_digital_mute,
410};
411
Mark Brown16af7d62011-01-26 11:35:28 +0000412static struct snd_soc_dai_driver cs4271_dai = {
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300413 .name = "cs4271-hifi",
414 .playback = {
415 .stream_name = "Playback",
416 .channels_min = 2,
417 .channels_max = 2,
Alexander Sverdlin383f8462011-03-07 20:29:36 +0300418 .rates = CS4271_PCM_RATES,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300419 .formats = CS4271_PCM_FORMATS,
420 },
421 .capture = {
422 .stream_name = "Capture",
423 .channels_min = 2,
424 .channels_max = 2,
Alexander Sverdlin383f8462011-03-07 20:29:36 +0300425 .rates = CS4271_PCM_RATES,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300426 .formats = CS4271_PCM_FORMATS,
427 },
428 .ops = &cs4271_dai_ops,
429 .symmetric_rates = 1,
430};
431
432#ifdef CONFIG_PM
Lars-Peter Clausen84b315e2011-12-02 10:18:28 +0100433static int cs4271_soc_suspend(struct snd_soc_codec *codec)
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300434{
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300435 int ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300436 /* Set power-down bit */
Axel Linef0cd472011-11-19 14:41:07 +0800437 ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN,
438 CS4271_MODE2_PDN);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300439 if (ret < 0)
440 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300441 return 0;
442}
443
444static int cs4271_soc_resume(struct snd_soc_codec *codec)
445{
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300446 int ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300447 /* Restore codec state */
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300448 ret = snd_soc_cache_sync(codec);
449 if (ret < 0)
450 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300451 /* then disable the power-down bit */
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300452 ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
453 if (ret < 0)
454 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300455 return 0;
456}
457#else
458#define cs4271_soc_suspend NULL
459#define cs4271_soc_resume NULL
460#endif /* CONFIG_PM */
461
462static int cs4271_probe(struct snd_soc_codec *codec)
463{
464 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
465 struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
466 int ret;
467 int gpio_nreset = -EINVAL;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300468
Alexander Sverdlina98a0bc2011-02-03 03:11:45 +0300469 if (cs4271plat && gpio_is_valid(cs4271plat->gpio_nreset))
470 gpio_nreset = cs4271plat->gpio_nreset;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300471
472 if (gpio_nreset >= 0)
473 if (gpio_request(gpio_nreset, "CS4271 Reset"))
474 gpio_nreset = -EINVAL;
475 if (gpio_nreset >= 0) {
476 /* Reset codec */
477 gpio_direction_output(gpio_nreset, 0);
478 udelay(1);
479 gpio_set_value(gpio_nreset, 1);
480 /* Give the codec time to wake up */
481 udelay(1);
482 }
483
484 cs4271->gpio_nreset = gpio_nreset;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300485
486 /*
487 * In case of I2C, chip address specified in board data.
488 * So cache IO operations use 8 bit codec register address.
489 * In case of SPI, chip address and register address
490 * passed together as 16 bit value.
491 * Anyway, register address is masked with 0xFF inside
492 * soc-cache code.
493 */
494 if (cs4271->bus_type == SND_SOC_SPI)
495 ret = snd_soc_codec_set_cache_io(codec, 16, 8,
496 cs4271->bus_type);
497 else
498 ret = snd_soc_codec_set_cache_io(codec, 8, 8,
499 cs4271->bus_type);
500 if (ret) {
501 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
502 return ret;
503 }
504
Axel Linef0cd472011-11-19 14:41:07 +0800505 ret = snd_soc_update_bits(codec, CS4271_MODE2,
506 CS4271_MODE2_PDN | CS4271_MODE2_CPEN,
507 CS4271_MODE2_PDN | CS4271_MODE2_CPEN);
Alexander Sverdlin0d42e6e2011-01-21 22:22:07 +0300508 if (ret < 0)
509 return ret;
510 ret = snd_soc_update_bits(codec, CS4271_MODE2, CS4271_MODE2_PDN, 0);
511 if (ret < 0)
512 return ret;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300513 /* Power-up sequence requires 85 uS */
514 udelay(85);
515
Liam Girdwood022658b2012-02-03 17:43:09 +0000516 return snd_soc_add_codec_controls(codec, cs4271_snd_controls,
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300517 ARRAY_SIZE(cs4271_snd_controls));
518}
519
520static int cs4271_remove(struct snd_soc_codec *codec)
521{
522 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
Alexander Sverdlina98a0bc2011-02-03 03:11:45 +0300523 int gpio_nreset;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300524
525 gpio_nreset = cs4271->gpio_nreset;
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300526
527 if (gpio_is_valid(gpio_nreset)) {
528 /* Set codec to the reset state */
529 gpio_set_value(gpio_nreset, 0);
530 gpio_free(gpio_nreset);
531 }
532
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300533 return 0;
534};
535
Mark Brown16af7d62011-01-26 11:35:28 +0000536static struct snd_soc_codec_driver soc_codec_dev_cs4271 = {
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300537 .probe = cs4271_probe,
538 .remove = cs4271_remove,
539 .suspend = cs4271_soc_suspend,
540 .resume = cs4271_soc_resume,
541 .reg_cache_default = cs4271_dflt_reg,
542 .reg_cache_size = ARRAY_SIZE(cs4271_dflt_reg),
543 .reg_word_size = sizeof(cs4271_dflt_reg[0]),
544 .compress_type = SND_SOC_FLAT_COMPRESSION,
545};
546
547#if defined(CONFIG_SPI_MASTER)
548static int __devinit cs4271_spi_probe(struct spi_device *spi)
549{
550 struct cs4271_private *cs4271;
551
552 cs4271 = devm_kzalloc(&spi->dev, sizeof(*cs4271), GFP_KERNEL);
553 if (!cs4271)
554 return -ENOMEM;
555
556 spi_set_drvdata(spi, cs4271);
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300557 cs4271->bus_type = SND_SOC_SPI;
558
559 return snd_soc_register_codec(&spi->dev, &soc_codec_dev_cs4271,
560 &cs4271_dai, 1);
561}
562
563static int __devexit cs4271_spi_remove(struct spi_device *spi)
564{
565 snd_soc_unregister_codec(&spi->dev);
566 return 0;
567}
568
569static struct spi_driver cs4271_spi_driver = {
570 .driver = {
571 .name = "cs4271",
572 .owner = THIS_MODULE,
573 },
574 .probe = cs4271_spi_probe,
575 .remove = __devexit_p(cs4271_spi_remove),
576};
577#endif /* defined(CONFIG_SPI_MASTER) */
578
579#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
Axel Lin79a54ea2011-03-04 15:22:03 +0800580static const struct i2c_device_id cs4271_i2c_id[] = {
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300581 {"cs4271", 0},
582 {}
583};
584MODULE_DEVICE_TABLE(i2c, cs4271_i2c_id);
585
586static int __devinit cs4271_i2c_probe(struct i2c_client *client,
587 const struct i2c_device_id *id)
588{
589 struct cs4271_private *cs4271;
590
591 cs4271 = devm_kzalloc(&client->dev, sizeof(*cs4271), GFP_KERNEL);
592 if (!cs4271)
593 return -ENOMEM;
594
595 i2c_set_clientdata(client, cs4271);
Alexander Sverdlin67b22512011-01-19 21:22:06 +0300596 cs4271->bus_type = SND_SOC_I2C;
597
598 return snd_soc_register_codec(&client->dev, &soc_codec_dev_cs4271,
599 &cs4271_dai, 1);
600}
601
602static int __devexit cs4271_i2c_remove(struct i2c_client *client)
603{
604 snd_soc_unregister_codec(&client->dev);
605 return 0;
606}
607
608static struct i2c_driver cs4271_i2c_driver = {
609 .driver = {
610 .name = "cs4271",
611 .owner = THIS_MODULE,
612 },
613 .id_table = cs4271_i2c_id,
614 .probe = cs4271_i2c_probe,
615 .remove = __devexit_p(cs4271_i2c_remove),
616};
617#endif /* defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) */
618
619/*
620 * We only register our serial bus driver here without
621 * assignment to particular chip. So if any of the below
622 * fails, there is some problem with I2C or SPI subsystem.
623 * In most cases this module will be compiled with support
624 * of only one serial bus.
625 */
626static int __init cs4271_modinit(void)
627{
628 int ret;
629
630#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
631 ret = i2c_add_driver(&cs4271_i2c_driver);
632 if (ret) {
633 pr_err("Failed to register CS4271 I2C driver: %d\n", ret);
634 return ret;
635 }
636#endif
637
638#if defined(CONFIG_SPI_MASTER)
639 ret = spi_register_driver(&cs4271_spi_driver);
640 if (ret) {
641 pr_err("Failed to register CS4271 SPI driver: %d\n", ret);
642 return ret;
643 }
644#endif
645
646 return 0;
647}
648module_init(cs4271_modinit);
649
650static void __exit cs4271_modexit(void)
651{
652#if defined(CONFIG_SPI_MASTER)
653 spi_unregister_driver(&cs4271_spi_driver);
654#endif
655
656#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
657 i2c_del_driver(&cs4271_i2c_driver);
658#endif
659}
660module_exit(cs4271_modexit);
661
662MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
663MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver");
664MODULE_LICENSE("GPL");