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