ASoC: Decouple DAPM from CODECs
[linux-2.6.git] / sound / soc / codecs / cq93vc.c
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/soc-dai.h>
40 #include <sound/soc-dapm.h>
41 #include <sound/initval.h>
42
43 #include <mach/dm365.h>
44
45 static inline unsigned int cq93vc_read(struct snd_soc_codec *codec,
46                                                 unsigned int reg)
47 {
48         struct davinci_vc *davinci_vc = codec->control_data;
49
50         return readl(davinci_vc->base + reg);
51 }
52
53 static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg,
54                        unsigned int value)
55 {
56         struct davinci_vc *davinci_vc = codec->control_data;
57
58         writel(value, davinci_vc->base + reg);
59
60         return 0;
61 }
62
63 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
64         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
65         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
66 };
67
68 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
69 {
70         struct snd_soc_codec *codec = dai->codec;
71         u8 reg = cq93vc_read(codec, DAVINCI_VC_REG09) & ~DAVINCI_VC_REG09_MUTE;
72
73         if (mute)
74                 cq93vc_write(codec, DAVINCI_VC_REG09,
75                              reg | DAVINCI_VC_REG09_MUTE);
76         else
77                 cq93vc_write(codec, DAVINCI_VC_REG09, reg);
78
79         return 0;
80 }
81
82 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
83                                  int clk_id, unsigned int freq, int dir)
84 {
85         struct snd_soc_codec *codec = codec_dai->codec;
86         struct davinci_vc *davinci_vc = codec->control_data;
87
88         switch (freq) {
89         case 22579200:
90         case 27000000:
91         case 33868800:
92                 davinci_vc->cq93vc.sysclk = freq;
93                 return 0;
94         }
95
96         return -EINVAL;
97 }
98
99 static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
100                                 enum snd_soc_bias_level level)
101 {
102         switch (level) {
103         case SND_SOC_BIAS_ON:
104                 cq93vc_write(codec, DAVINCI_VC_REG12,
105                              DAVINCI_VC_REG12_POWER_ALL_ON);
106                 break;
107         case SND_SOC_BIAS_PREPARE:
108                 break;
109         case SND_SOC_BIAS_STANDBY:
110                 cq93vc_write(codec, DAVINCI_VC_REG12,
111                              DAVINCI_VC_REG12_POWER_ALL_OFF);
112                 break;
113         case SND_SOC_BIAS_OFF:
114                 /* force all power off */
115                 cq93vc_write(codec, DAVINCI_VC_REG12,
116                              DAVINCI_VC_REG12_POWER_ALL_OFF);
117                 break;
118         }
119         codec->dapm.bias_level = level;
120
121         return 0;
122 }
123
124 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
125 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
126
127 static struct snd_soc_dai_ops cq93vc_dai_ops = {
128         .digital_mute   = cq93vc_mute,
129         .set_sysclk     = cq93vc_set_dai_sysclk,
130 };
131
132 static struct snd_soc_dai_driver cq93vc_dai = {
133         .name = "cq93vc-hifi",
134         .playback = {
135                 .stream_name = "Playback",
136                 .channels_min = 1,
137                 .channels_max = 2,
138                 .rates = CQ93VC_RATES,
139                 .formats = CQ93VC_FORMATS,},
140         .capture = {
141                 .stream_name = "Capture",
142                 .channels_min = 1,
143                 .channels_max = 2,
144                 .rates = CQ93VC_RATES,
145                 .formats = CQ93VC_FORMATS,},
146         .ops = &cq93vc_dai_ops,
147 };
148
149 static int cq93vc_resume(struct snd_soc_codec *codec)
150 {
151         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
152
153         return 0;
154 }
155
156 static int cq93vc_probe(struct snd_soc_codec *codec)
157 {
158         struct davinci_vc *davinci_vc = codec->dev->platform_data;
159
160         davinci_vc->cq93vc.codec = codec;
161         codec->control_data = davinci_vc;
162
163         /* Set controls */
164         snd_soc_add_controls(codec, cq93vc_snd_controls,
165                              ARRAY_SIZE(cq93vc_snd_controls));
166
167         /* Off, with power on */
168         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
169
170         return 0;
171 }
172
173 static int cq93vc_remove(struct snd_soc_codec *codec)
174 {
175         cq93vc_set_bias_level(codec, SND_SOC_BIAS_OFF);
176
177         return 0;
178 }
179
180 static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
181         .read = cq93vc_read,
182         .write = cq93vc_write,
183         .set_bias_level = cq93vc_set_bias_level,
184         .probe = cq93vc_probe,
185         .remove = cq93vc_remove,
186         .resume = cq93vc_resume,
187 };
188
189 static int cq93vc_platform_probe(struct platform_device *pdev)
190 {
191         return snd_soc_register_codec(&pdev->dev,
192                         &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
193 }
194
195 static int cq93vc_platform_remove(struct platform_device *pdev)
196 {
197         snd_soc_unregister_codec(&pdev->dev);
198         return 0;
199 }
200
201 static struct platform_driver cq93vc_codec_driver = {
202         .driver = {
203                         .name = "cq93vc-codec",
204                         .owner = THIS_MODULE,
205         },
206
207         .probe = cq93vc_platform_probe,
208         .remove = __devexit_p(cq93vc_platform_remove),
209 };
210
211 static int __init cq93vc_init(void)
212 {
213         return platform_driver_register(&cq93vc_codec_driver);
214 }
215 module_init(cq93vc_init);
216
217 static void __exit cq93vc_exit(void)
218 {
219         platform_driver_unregister(&cq93vc_codec_driver);
220 }
221 module_exit(cq93vc_exit);
222
223 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
224 MODULE_AUTHOR("Miguel Aguilar");
225 MODULE_LICENSE("GPL");