1 /* 2 * Littlemill audio support 3 * 4 * Copyright 2011 Wolfson Microelectronics 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 */ 11 12 #include <sound/soc.h> 13 #include <sound/soc-dapm.h> 14 #include <sound/jack.h> 15 #include <linux/gpio.h> 16 #include <linux/module.h> 17 18 #include "../codecs/wm8994.h" 19 20 static int sample_rate = 44100; 21 22 static int littlemill_set_bias_level(struct snd_soc_card *card, 23 struct snd_soc_dapm_context *dapm, 24 enum snd_soc_bias_level level) 25 { 26 struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; 27 int ret; 28 29 if (dapm->dev != codec_dai->dev) 30 return 0; 31 32 switch (level) { 33 case SND_SOC_BIAS_PREPARE: 34 /* 35 * If we've not already clocked things via hw_params() 36 * then do so now, otherwise these are noops. 37 */ 38 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) { 39 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 40 WM8994_FLL_SRC_MCLK2, 32768, 41 sample_rate * 512); 42 if (ret < 0) { 43 pr_err("Failed to start FLL: %d\n", ret); 44 return ret; 45 } 46 47 ret = snd_soc_dai_set_sysclk(codec_dai, 48 WM8994_SYSCLK_FLL1, 49 sample_rate * 512, 50 SND_SOC_CLOCK_IN); 51 if (ret < 0) { 52 pr_err("Failed to set SYSCLK: %d\n", ret); 53 return ret; 54 } 55 } 56 break; 57 58 default: 59 break; 60 } 61 62 return 0; 63 } 64 65 static int littlemill_set_bias_level_post(struct snd_soc_card *card, 66 struct snd_soc_dapm_context *dapm, 67 enum snd_soc_bias_level level) 68 { 69 struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; 70 int ret; 71 72 if (dapm->dev != codec_dai->dev) 73 return 0; 74 75 switch (level) { 76 case SND_SOC_BIAS_STANDBY: 77 ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK2, 78 32768, SND_SOC_CLOCK_IN); 79 if (ret < 0) { 80 pr_err("Failed to switch away from FLL: %d\n", ret); 81 return ret; 82 } 83 84 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 85 0, 0, 0); 86 if (ret < 0) { 87 pr_err("Failed to stop FLL: %d\n", ret); 88 return ret; 89 } 90 break; 91 92 default: 93 break; 94 } 95 96 dapm->bias_level = level; 97 98 return 0; 99 } 100 101 static int littlemill_hw_params(struct snd_pcm_substream *substream, 102 struct snd_pcm_hw_params *params) 103 { 104 struct snd_soc_pcm_runtime *rtd = substream->private_data; 105 struct snd_soc_dai *codec_dai = rtd->codec_dai; 106 int ret; 107 108 sample_rate = params_rate(params); 109 110 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 111 WM8994_FLL_SRC_MCLK2, 32768, 112 sample_rate * 512); 113 if (ret < 0) { 114 pr_err("Failed to start FLL: %d\n", ret); 115 return ret; 116 } 117 118 ret = snd_soc_dai_set_sysclk(codec_dai, 119 WM8994_SYSCLK_FLL1, 120 sample_rate * 512, 121 SND_SOC_CLOCK_IN); 122 if (ret < 0) { 123 pr_err("Failed to set SYSCLK: %d\n", ret); 124 return ret; 125 } 126 127 return 0; 128 } 129 130 static struct snd_soc_ops littlemill_ops = { 131 .hw_params = littlemill_hw_params, 132 }; 133 134 static struct snd_soc_dai_link littlemill_dai[] = { 135 { 136 .name = "CPU", 137 .stream_name = "CPU", 138 .cpu_dai_name = "samsung-i2s.0", 139 .codec_dai_name = "wm8994-aif1", 140 .platform_name = "samsung-audio", 141 .codec_name = "wm8994-codec", 142 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 143 | SND_SOC_DAIFMT_CBM_CFM, 144 .ops = &littlemill_ops, 145 }, 146 }; 147 148 static struct snd_soc_dapm_widget widgets[] = { 149 SND_SOC_DAPM_HP("Headphone", NULL), 150 151 SND_SOC_DAPM_MIC("AMIC", NULL), 152 SND_SOC_DAPM_MIC("DMIC", NULL), 153 }; 154 155 static struct snd_soc_dapm_route audio_paths[] = { 156 { "Headphone", NULL, "HPOUT1L" }, 157 { "Headphone", NULL, "HPOUT1R" }, 158 159 { "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */ 160 { "IN1LN", NULL, "AMIC" }, 161 162 { "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */ 163 { "DMIC1DAT", NULL, "DMIC" }, 164 { "DMIC2DAT", NULL, "DMIC" }, 165 }; 166 167 static struct snd_soc_jack littlemill_headset; 168 169 static int littlemill_late_probe(struct snd_soc_card *card) 170 { 171 struct snd_soc_codec *codec = card->rtd[0].codec; 172 struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; 173 int ret; 174 175 ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK2, 176 32768, SND_SOC_CLOCK_IN); 177 if (ret < 0) 178 return ret; 179 180 ret = snd_soc_jack_new(codec, "Headset", 181 SND_JACK_HEADSET | SND_JACK_MECHANICAL | 182 SND_JACK_BTN_0 | SND_JACK_BTN_1 | 183 SND_JACK_BTN_2 | SND_JACK_BTN_3 | 184 SND_JACK_BTN_4 | SND_JACK_BTN_5, 185 &littlemill_headset); 186 if (ret) 187 return ret; 188 189 /* This will check device compatibility itself */ 190 wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL); 191 192 /* As will this */ 193 wm8994_mic_detect(codec, &littlemill_headset, 1); 194 195 return 0; 196 } 197 198 static struct snd_soc_card littlemill = { 199 .name = "Littlemill", 200 .owner = THIS_MODULE, 201 .dai_link = littlemill_dai, 202 .num_links = ARRAY_SIZE(littlemill_dai), 203 204 .set_bias_level = littlemill_set_bias_level, 205 .set_bias_level_post = littlemill_set_bias_level_post, 206 207 .dapm_widgets = widgets, 208 .num_dapm_widgets = ARRAY_SIZE(widgets), 209 .dapm_routes = audio_paths, 210 .num_dapm_routes = ARRAY_SIZE(audio_paths), 211 212 .late_probe = littlemill_late_probe, 213 }; 214 215 static __devinit int littlemill_probe(struct platform_device *pdev) 216 { 217 struct snd_soc_card *card = &littlemill; 218 int ret; 219 220 card->dev = &pdev->dev; 221 222 ret = snd_soc_register_card(card); 223 if (ret) { 224 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", 225 ret); 226 return ret; 227 } 228 229 return 0; 230 } 231 232 static int __devexit littlemill_remove(struct platform_device *pdev) 233 { 234 struct snd_soc_card *card = platform_get_drvdata(pdev); 235 236 snd_soc_unregister_card(card); 237 238 return 0; 239 } 240 241 static struct platform_driver littlemill_driver = { 242 .driver = { 243 .name = "littlemill", 244 .owner = THIS_MODULE, 245 .pm = &snd_soc_pm_ops, 246 }, 247 .probe = littlemill_probe, 248 .remove = __devexit_p(littlemill_remove), 249 }; 250 251 module_platform_driver(littlemill_driver); 252 253 MODULE_DESCRIPTION("Littlemill audio support"); 254 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 255 MODULE_LICENSE("GPL"); 256 MODULE_ALIAS("platform:littlemill"); 257