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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         struct snd_soc_codec *codec = codec_dai->codec;
 66         struct davinci_vc *davinci_vc = codec->dev->platform_data;
 67 
 68         switch (freq) {
 69         case 22579200:
 70         case 27000000:
 71         case 33868800:
 72                 davinci_vc->cq93vc.sysclk = freq;
 73                 return 0;
 74         }
 75 
 76         return -EINVAL;
 77 }
 78 
 79 static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
 80                                 enum snd_soc_bias_level level)
 81 {
 82         switch (level) {
 83         case SND_SOC_BIAS_ON:
 84                 snd_soc_write(codec, DAVINCI_VC_REG12,
 85                              DAVINCI_VC_REG12_POWER_ALL_ON);
 86                 break;
 87         case SND_SOC_BIAS_PREPARE:
 88                 break;
 89         case SND_SOC_BIAS_STANDBY:
 90                 snd_soc_write(codec, DAVINCI_VC_REG12,
 91                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 92                 break;
 93         case SND_SOC_BIAS_OFF:
 94                 /* force all power off */
 95                 snd_soc_write(codec, DAVINCI_VC_REG12,
 96                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 97                 break;
 98         }
 99         codec->dapm.bias_level = level;
100 
101         return 0;
102 }
103 
104 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
105 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
106 
107 static const struct snd_soc_dai_ops cq93vc_dai_ops = {
108         .digital_mute   = cq93vc_mute,
109         .set_sysclk     = cq93vc_set_dai_sysclk,
110 };
111 
112 static struct snd_soc_dai_driver cq93vc_dai = {
113         .name = "cq93vc-hifi",
114         .playback = {
115                 .stream_name = "Playback",
116                 .channels_min = 1,
117                 .channels_max = 2,
118                 .rates = CQ93VC_RATES,
119                 .formats = CQ93VC_FORMATS,},
120         .capture = {
121                 .stream_name = "Capture",
122                 .channels_min = 1,
123                 .channels_max = 2,
124                 .rates = CQ93VC_RATES,
125                 .formats = CQ93VC_FORMATS,},
126         .ops = &cq93vc_dai_ops,
127 };
128 
129 static int cq93vc_resume(struct snd_soc_codec *codec)
130 {
131         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
132 
133         return 0;
134 }
135 
136 static int cq93vc_probe(struct snd_soc_codec *codec)
137 {
138         struct davinci_vc *davinci_vc = codec->dev->platform_data;
139 
140         davinci_vc->cq93vc.codec = codec;
141 
142         snd_soc_codec_set_cache_io(codec, davinci_vc->regmap);
143 
144         /* Off, with power on */
145         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
146 
147         return 0;
148 }
149 
150 static int cq93vc_remove(struct snd_soc_codec *codec)
151 {
152         cq93vc_set_bias_level(codec, SND_SOC_BIAS_OFF);
153 
154         return 0;
155 }
156 
157 static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
158         .set_bias_level = cq93vc_set_bias_level,
159         .probe = cq93vc_probe,
160         .remove = cq93vc_remove,
161         .resume = cq93vc_resume,
162         .controls = cq93vc_snd_controls,
163         .num_controls = ARRAY_SIZE(cq93vc_snd_controls),
164 };
165 
166 static int cq93vc_platform_probe(struct platform_device *pdev)
167 {
168         return snd_soc_register_codec(&pdev->dev,
169                         &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
170 }
171 
172 static int cq93vc_platform_remove(struct platform_device *pdev)
173 {
174         snd_soc_unregister_codec(&pdev->dev);
175         return 0;
176 }
177 
178 static struct platform_driver cq93vc_codec_driver = {
179         .driver = {
180                         .name = "cq93vc-codec",
181                         .owner = THIS_MODULE,
182         },
183 
184         .probe = cq93vc_platform_probe,
185         .remove = cq93vc_platform_remove,
186 };
187 
188 module_platform_driver(cq93vc_codec_driver);
189 
190 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
191 MODULE_AUTHOR("Miguel Aguilar");
192 MODULE_LICENSE("GPL");
193 

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