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