tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
3 *
4 * Copyright (C) 2010 Texas Instruments, Inc
5 *
6 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22#include <linux/module.h>
23#include <linux/moduleparam.h>
24#include <linux/init.h>
25#include <linux/io.h>
26#include <linux/delay.h>
27#include <linux/pm.h>
28#include <linux/platform_device.h>
29#include <linux/device.h>
30#include <linux/slab.h>
31#include <linux/clk.h>
32#include <linux/mfd/davinci_voicecodec.h>
33#include <linux/spi/spi.h>
34
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/initval.h>
40
41static inline unsigned int cq93vc_read(struct snd_soc_codec *codec,
42 unsigned int reg)
43{
44 struct davinci_vc *davinci_vc = codec->control_data;
45
46 return readl(davinci_vc->base + reg);
47}
48
49static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg,
50 unsigned int value)
51{
52 struct davinci_vc *davinci_vc = codec->control_data;
53
54 writel(value, davinci_vc->base + reg);
55
56 return 0;
57}
58
59static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
60 SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
61 SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
62};
63
64static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
65{
66 struct snd_soc_codec *codec = dai->codec;
67 u8 reg = cq93vc_read(codec, DAVINCI_VC_REG09) & ~DAVINCI_VC_REG09_MUTE;
68
69 if (mute)
70 cq93vc_write(codec, DAVINCI_VC_REG09,
71 reg | DAVINCI_VC_REG09_MUTE);
72 else
73 cq93vc_write(codec, DAVINCI_VC_REG09, reg);
74
75 return 0;
76}
77
78static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
79 int clk_id, unsigned int freq, int dir)
80{
81 struct snd_soc_codec *codec = codec_dai->codec;
82 struct davinci_vc *davinci_vc = codec->control_data;
83
84 switch (freq) {
85 case 22579200:
86 case 27000000:
87 case 33868800:
88 davinci_vc->cq93vc.sysclk = freq;
89 return 0;
90 }
91
92 return -EINVAL;
93}
94
95static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
96 enum snd_soc_bias_level level)
97{
98 switch (level) {
99 case SND_SOC_BIAS_ON:
100 cq93vc_write(codec, DAVINCI_VC_REG12,
101 DAVINCI_VC_REG12_POWER_ALL_ON);
102 break;
103 case SND_SOC_BIAS_PREPARE:
104 break;
105 case SND_SOC_BIAS_STANDBY:
106 cq93vc_write(codec, DAVINCI_VC_REG12,
107 DAVINCI_VC_REG12_POWER_ALL_OFF);
108 break;
109 case SND_SOC_BIAS_OFF:
110 /* force all power off */
111 cq93vc_write(codec, DAVINCI_VC_REG12,
112 DAVINCI_VC_REG12_POWER_ALL_OFF);
113 break;
114 }
115 codec->dapm.bias_level = level;
116
117 return 0;
118}
119
120#define CQ93VC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
121#define CQ93VC_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
122
123static const struct snd_soc_dai_ops cq93vc_dai_ops = {
124 .digital_mute = cq93vc_mute,
125 .set_sysclk = cq93vc_set_dai_sysclk,
126};
127
128static struct snd_soc_dai_driver cq93vc_dai = {
129 .name = "cq93vc-hifi",
130 .playback = {
131 .stream_name = "Playback",
132 .channels_min = 1,
133 .channels_max = 2,
134 .rates = CQ93VC_RATES,
135 .formats = CQ93VC_FORMATS,},
136 .capture = {
137 .stream_name = "Capture",
138 .channels_min = 1,
139 .channels_max = 2,
140 .rates = CQ93VC_RATES,
141 .formats = CQ93VC_FORMATS,},
142 .ops = &cq93vc_dai_ops,
143};
144
145static int cq93vc_resume(struct snd_soc_codec *codec)
146{
147 cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
148
149 return 0;
150}
151
152static int cq93vc_probe(struct snd_soc_codec *codec)
153{
154 struct davinci_vc *davinci_vc = codec->dev->platform_data;
155
156 davinci_vc->cq93vc.codec = codec;
157 codec->control_data = davinci_vc;
158
159 /* Set controls */
160 snd_soc_add_codec_controls(codec, cq93vc_snd_controls,
161 ARRAY_SIZE(cq93vc_snd_controls));
162
163 /* Off, with power on */
164 cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
165
166 return 0;
167}
168
169static int cq93vc_remove(struct snd_soc_codec *codec)
170{
171 cq93vc_set_bias_level(codec, SND_SOC_BIAS_OFF);
172
173 return 0;
174}
175
176static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
177 .read = cq93vc_read,
178 .write = cq93vc_write,
179 .set_bias_level = cq93vc_set_bias_level,
180 .probe = cq93vc_probe,
181 .remove = cq93vc_remove,
182 .resume = cq93vc_resume,
183};
184
185static int cq93vc_platform_probe(struct platform_device *pdev)
186{
187 return snd_soc_register_codec(&pdev->dev,
188 &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
189}
190
191static int cq93vc_platform_remove(struct platform_device *pdev)
192{
193 snd_soc_unregister_codec(&pdev->dev);
194 return 0;
195}
196
197static struct platform_driver cq93vc_codec_driver = {
198 .driver = {
199 .name = "cq93vc-codec",
200 .owner = THIS_MODULE,
201 },
202
203 .probe = cq93vc_platform_probe,
204 .remove = __devexit_p(cq93vc_platform_remove),
205};
206
207module_platform_driver(cq93vc_codec_driver);
208
209MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
210MODULE_AUTHOR("Miguel Aguilar");
211MODULE_LICENSE("GPL");