1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms 4 * 5 * Copyright (C) 2010 Texas Instruments, Inc 6 * 7 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com> 8 */ 9 #include <linux/module.h> 10 #include <linux/moduleparam.h> 11 #include <linux/init.h> 12 #include <linux/io.h> 13 #include <linux/delay.h> 14 #include <linux/pm.h> 15 #include <linux/platform_device.h> 16 #include <linux/device.h> 17 #include <linux/slab.h> 18 #include <linux/clk.h> 19 #include <linux/mfd/davinci_voicecodec.h> 20 #include <linux/spi/spi.h> 21 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/initval.h> 27 28 static const struct snd_kcontrol_new cq93vc_snd_controls[] = { 29 SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0), 30 SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0), 31 }; 32 33 static int cq93vc_mute(struct snd_soc_dai *dai, int mute, int direction) 34 { 35 struct snd_soc_component *component = dai->component; 36 u8 reg; 37 38 if (mute) 39 reg = DAVINCI_VC_REG09_MUTE; 40 else 41 reg = 0; 42 43 snd_soc_component_update_bits(component, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE, 44 reg); 45 46 return 0; 47 } 48 49 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai, 50 int clk_id, unsigned int freq, int dir) 51 { 52 switch (freq) { 53 case 22579200: 54 case 27000000: 55 case 33868800: 56 return 0; 57 } 58 59 return -EINVAL; 60 } 61 62 static int cq93vc_set_bias_level(struct snd_soc_component *component, 63 enum snd_soc_bias_level level) 64 { 65 switch (level) { 66 case SND_SOC_BIAS_ON: 67 snd_soc_component_write(component, DAVINCI_VC_REG12, 68 DAVINCI_VC_REG12_POWER_ALL_ON); 69 break; 70 case SND_SOC_BIAS_PREPARE: 71 break; 72 case SND_SOC_BIAS_STANDBY: 73 snd_soc_component_write(component, DAVINCI_VC_REG12, 74 DAVINCI_VC_REG12_POWER_ALL_OFF); 75 break; 76 case SND_SOC_BIAS_OFF: 77 /* force all power off */ 78 snd_soc_component_write(component, DAVINCI_VC_REG12, 79 DAVINCI_VC_REG12_POWER_ALL_OFF); 80 break; 81 } 82 83 return 0; 84 } 85 86 #define CQ93VC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000) 87 #define CQ93VC_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) 88 89 static const struct snd_soc_dai_ops cq93vc_dai_ops = { 90 .mute_stream = cq93vc_mute, 91 .set_sysclk = cq93vc_set_dai_sysclk, 92 .no_capture_mute = 1, 93 }; 94 95 static struct snd_soc_dai_driver cq93vc_dai = { 96 .name = "cq93vc-hifi", 97 .playback = { 98 .stream_name = "Playback", 99 .channels_min = 1, 100 .channels_max = 2, 101 .rates = CQ93VC_RATES, 102 .formats = CQ93VC_FORMATS,}, 103 .capture = { 104 .stream_name = "Capture", 105 .channels_min = 1, 106 .channels_max = 2, 107 .rates = CQ93VC_RATES, 108 .formats = CQ93VC_FORMATS,}, 109 .ops = &cq93vc_dai_ops, 110 }; 111 112 static int cq93vc_probe(struct snd_soc_component *component) 113 { 114 struct davinci_vc *davinci_vc = component->dev->platform_data; 115 116 snd_soc_component_init_regmap(component, davinci_vc->regmap); 117 118 return 0; 119 } 120 121 static const struct snd_soc_component_driver soc_component_dev_cq93vc = { 122 .set_bias_level = cq93vc_set_bias_level, 123 .probe = cq93vc_probe, 124 .controls = cq93vc_snd_controls, 125 .num_controls = ARRAY_SIZE(cq93vc_snd_controls), 126 .idle_bias_on = 1, 127 .use_pmdown_time = 1, 128 .endianness = 1, 129 }; 130 131 static int cq93vc_platform_probe(struct platform_device *pdev) 132 { 133 return devm_snd_soc_register_component(&pdev->dev, 134 &soc_component_dev_cq93vc, &cq93vc_dai, 1); 135 } 136 137 static int cq93vc_platform_remove(struct platform_device *pdev) 138 { 139 return 0; 140 } 141 142 static struct platform_driver cq93vc_codec_driver = { 143 .driver = { 144 .name = "cq93vc-codec", 145 }, 146 147 .probe = cq93vc_platform_probe, 148 .remove = cq93vc_platform_remove, 149 }; 150 151 module_platform_driver(cq93vc_codec_driver); 152 153 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver"); 154 MODULE_AUTHOR("Miguel Aguilar"); 155 MODULE_LICENSE("GPL"); 156