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Linux/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/initval.h>
 40 
 41 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
 42         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
 43         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
 44 };
 45 
 46 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
 47 {
 48         struct snd_soc_codec *codec = dai->codec;
 49         u8 reg;
 50 
 51         if (mute)
 52                 reg = DAVINCI_VC_REG09_MUTE;
 53         else
 54                 reg = 0;
 55 
 56         snd_soc_update_bits(codec, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
 57                             reg);
 58 
 59         return 0;
 60 }
 61 
 62 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 63                                  int clk_id, unsigned int freq, int dir)
 64 {
 65         switch (freq) {
 66         case 22579200:
 67         case 27000000:
 68         case 33868800:
 69                 return 0;
 70         }
 71 
 72         return -EINVAL;
 73 }
 74 
 75 static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
 76                                 enum snd_soc_bias_level level)
 77 {
 78         switch (level) {
 79         case SND_SOC_BIAS_ON:
 80                 snd_soc_write(codec, DAVINCI_VC_REG12,
 81                              DAVINCI_VC_REG12_POWER_ALL_ON);
 82                 break;
 83         case SND_SOC_BIAS_PREPARE:
 84                 break;
 85         case SND_SOC_BIAS_STANDBY:
 86                 snd_soc_write(codec, DAVINCI_VC_REG12,
 87                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 88                 break;
 89         case SND_SOC_BIAS_OFF:
 90                 /* force all power off */
 91                 snd_soc_write(codec, DAVINCI_VC_REG12,
 92                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 93                 break;
 94         }
 95         codec->dapm.bias_level = level;
 96 
 97         return 0;
 98 }
 99 
100 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
101 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
102 
103 static const struct snd_soc_dai_ops cq93vc_dai_ops = {
104         .digital_mute   = cq93vc_mute,
105         .set_sysclk     = cq93vc_set_dai_sysclk,
106 };
107 
108 static struct snd_soc_dai_driver cq93vc_dai = {
109         .name = "cq93vc-hifi",
110         .playback = {
111                 .stream_name = "Playback",
112                 .channels_min = 1,
113                 .channels_max = 2,
114                 .rates = CQ93VC_RATES,
115                 .formats = CQ93VC_FORMATS,},
116         .capture = {
117                 .stream_name = "Capture",
118                 .channels_min = 1,
119                 .channels_max = 2,
120                 .rates = CQ93VC_RATES,
121                 .formats = CQ93VC_FORMATS,},
122         .ops = &cq93vc_dai_ops,
123 };
124 
125 static struct regmap *cq93vc_get_regmap(struct device *dev)
126 {
127         struct davinci_vc *davinci_vc = dev->platform_data;
128 
129         return davinci_vc->regmap;
130 }
131 
132 static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
133         .set_bias_level = cq93vc_set_bias_level,
134         .get_regmap = cq93vc_get_regmap,
135         .controls = cq93vc_snd_controls,
136         .num_controls = ARRAY_SIZE(cq93vc_snd_controls),
137 };
138 
139 static int cq93vc_platform_probe(struct platform_device *pdev)
140 {
141         return snd_soc_register_codec(&pdev->dev,
142                         &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
143 }
144 
145 static int cq93vc_platform_remove(struct platform_device *pdev)
146 {
147         snd_soc_unregister_codec(&pdev->dev);
148         return 0;
149 }
150 
151 static struct platform_driver cq93vc_codec_driver = {
152         .driver = {
153                         .name = "cq93vc-codec",
154         },
155 
156         .probe = cq93vc_platform_probe,
157         .remove = cq93vc_platform_remove,
158 };
159 
160 module_platform_driver(cq93vc_codec_driver);
161 
162 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
163 MODULE_AUTHOR("Miguel Aguilar");
164 MODULE_LICENSE("GPL");
165 

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