10a590b1dSMark Brown /* 20a590b1dSMark Brown * Littlemill audio support 30a590b1dSMark Brown * 40a590b1dSMark Brown * Copyright 2011 Wolfson Microelectronics 50a590b1dSMark Brown * 60a590b1dSMark Brown * This program is free software; you can redistribute it and/or modify it 70a590b1dSMark Brown * under the terms of the GNU General Public License as published by the 80a590b1dSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 90a590b1dSMark Brown * option) any later version. 100a590b1dSMark Brown */ 110a590b1dSMark Brown 120a590b1dSMark Brown #include <sound/soc.h> 130a590b1dSMark Brown #include <sound/soc-dapm.h> 140a590b1dSMark Brown #include <sound/jack.h> 150a590b1dSMark Brown #include <linux/gpio.h> 160a590b1dSMark Brown #include <linux/module.h> 170a590b1dSMark Brown 180a590b1dSMark Brown #include "../codecs/wm8994.h" 190a590b1dSMark Brown 200a590b1dSMark Brown static int sample_rate = 44100; 210a590b1dSMark Brown 220a590b1dSMark Brown static int littlemill_set_bias_level(struct snd_soc_card *card, 230a590b1dSMark Brown struct snd_soc_dapm_context *dapm, 240a590b1dSMark Brown enum snd_soc_bias_level level) 250a590b1dSMark Brown { 260a590b1dSMark Brown struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; 270a590b1dSMark Brown int ret; 280a590b1dSMark Brown 290a590b1dSMark Brown if (dapm->dev != codec_dai->dev) 300a590b1dSMark Brown return 0; 310a590b1dSMark Brown 320a590b1dSMark Brown switch (level) { 330a590b1dSMark Brown case SND_SOC_BIAS_PREPARE: 340a590b1dSMark Brown /* 350a590b1dSMark Brown * If we've not already clocked things via hw_params() 360a590b1dSMark Brown * then do so now, otherwise these are noops. 370a590b1dSMark Brown */ 380a590b1dSMark Brown if (dapm->bias_level == SND_SOC_BIAS_STANDBY) { 390a590b1dSMark Brown ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 400a590b1dSMark Brown WM8994_FLL_SRC_MCLK2, 32768, 410a590b1dSMark Brown sample_rate * 512); 420a590b1dSMark Brown if (ret < 0) { 430a590b1dSMark Brown pr_err("Failed to start FLL: %d\n", ret); 440a590b1dSMark Brown return ret; 450a590b1dSMark Brown } 460a590b1dSMark Brown 470a590b1dSMark Brown ret = snd_soc_dai_set_sysclk(codec_dai, 480a590b1dSMark Brown WM8994_SYSCLK_FLL1, 490a590b1dSMark Brown sample_rate * 512, 500a590b1dSMark Brown SND_SOC_CLOCK_IN); 510a590b1dSMark Brown if (ret < 0) { 520a590b1dSMark Brown pr_err("Failed to set SYSCLK: %d\n", ret); 530a590b1dSMark Brown return ret; 540a590b1dSMark Brown } 550a590b1dSMark Brown } 560a590b1dSMark Brown break; 570a590b1dSMark Brown 580a590b1dSMark Brown default: 590a590b1dSMark Brown break; 600a590b1dSMark Brown } 610a590b1dSMark Brown 620a590b1dSMark Brown return 0; 630a590b1dSMark Brown } 640a590b1dSMark Brown 650a590b1dSMark Brown static int littlemill_set_bias_level_post(struct snd_soc_card *card, 660a590b1dSMark Brown struct snd_soc_dapm_context *dapm, 670a590b1dSMark Brown enum snd_soc_bias_level level) 680a590b1dSMark Brown { 690a590b1dSMark Brown struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; 700a590b1dSMark Brown int ret; 710a590b1dSMark Brown 720a590b1dSMark Brown if (dapm->dev != codec_dai->dev) 730a590b1dSMark Brown return 0; 740a590b1dSMark Brown 750a590b1dSMark Brown switch (level) { 760a590b1dSMark Brown case SND_SOC_BIAS_STANDBY: 770a590b1dSMark Brown ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK2, 780a590b1dSMark Brown 32768, SND_SOC_CLOCK_IN); 790a590b1dSMark Brown if (ret < 0) { 800a590b1dSMark Brown pr_err("Failed to switch away from FLL: %d\n", ret); 810a590b1dSMark Brown return ret; 820a590b1dSMark Brown } 830a590b1dSMark Brown 840a590b1dSMark Brown ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 850a590b1dSMark Brown 0, 0, 0); 860a590b1dSMark Brown if (ret < 0) { 870a590b1dSMark Brown pr_err("Failed to stop FLL: %d\n", ret); 880a590b1dSMark Brown return ret; 890a590b1dSMark Brown } 900a590b1dSMark Brown break; 910a590b1dSMark Brown 920a590b1dSMark Brown default: 930a590b1dSMark Brown break; 940a590b1dSMark Brown } 950a590b1dSMark Brown 960a590b1dSMark Brown dapm->bias_level = level; 970a590b1dSMark Brown 980a590b1dSMark Brown return 0; 990a590b1dSMark Brown } 1000a590b1dSMark Brown 1010a590b1dSMark Brown static int littlemill_hw_params(struct snd_pcm_substream *substream, 1020a590b1dSMark Brown struct snd_pcm_hw_params *params) 1030a590b1dSMark Brown { 1040a590b1dSMark Brown struct snd_soc_pcm_runtime *rtd = substream->private_data; 1050a590b1dSMark Brown struct snd_soc_dai *codec_dai = rtd->codec_dai; 1060a590b1dSMark Brown int ret; 1070a590b1dSMark Brown 1080a590b1dSMark Brown sample_rate = params_rate(params); 1090a590b1dSMark Brown 1100a590b1dSMark Brown ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 1110a590b1dSMark Brown WM8994_FLL_SRC_MCLK2, 32768, 1120a590b1dSMark Brown sample_rate * 512); 1130a590b1dSMark Brown if (ret < 0) { 1140a590b1dSMark Brown pr_err("Failed to start FLL: %d\n", ret); 1150a590b1dSMark Brown return ret; 1160a590b1dSMark Brown } 1170a590b1dSMark Brown 1180a590b1dSMark Brown ret = snd_soc_dai_set_sysclk(codec_dai, 1190a590b1dSMark Brown WM8994_SYSCLK_FLL1, 1200a590b1dSMark Brown sample_rate * 512, 1210a590b1dSMark Brown SND_SOC_CLOCK_IN); 1220a590b1dSMark Brown if (ret < 0) { 1230a590b1dSMark Brown pr_err("Failed to set SYSCLK: %d\n", ret); 1240a590b1dSMark Brown return ret; 1250a590b1dSMark Brown } 1260a590b1dSMark Brown 1270a590b1dSMark Brown return 0; 1280a590b1dSMark Brown } 1290a590b1dSMark Brown 1300a590b1dSMark Brown static struct snd_soc_ops littlemill_ops = { 1310a590b1dSMark Brown .hw_params = littlemill_hw_params, 1320a590b1dSMark Brown }; 1330a590b1dSMark Brown 1340a590b1dSMark Brown static struct snd_soc_dai_link littlemill_dai[] = { 1350a590b1dSMark Brown { 1360a590b1dSMark Brown .name = "CPU", 1370a590b1dSMark Brown .stream_name = "CPU", 1380a590b1dSMark Brown .cpu_dai_name = "samsung-i2s.0", 1390a590b1dSMark Brown .codec_dai_name = "wm8994-aif1", 1400a590b1dSMark Brown .platform_name = "samsung-audio", 1410a590b1dSMark Brown .codec_name = "wm8994-codec", 1420a590b1dSMark Brown .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 1430a590b1dSMark Brown | SND_SOC_DAIFMT_CBM_CFM, 1440a590b1dSMark Brown .ops = &littlemill_ops, 1450a590b1dSMark Brown }, 1460a590b1dSMark Brown }; 1470a590b1dSMark Brown 1480a590b1dSMark Brown static struct snd_soc_dapm_widget widgets[] = { 1490a590b1dSMark Brown SND_SOC_DAPM_HP("Headphone", NULL), 1508f103167SMark Brown 1518f103167SMark Brown SND_SOC_DAPM_MIC("AMIC", NULL), 1528f103167SMark Brown SND_SOC_DAPM_MIC("DMIC", NULL), 1530a590b1dSMark Brown }; 1540a590b1dSMark Brown 1550a590b1dSMark Brown static struct snd_soc_dapm_route audio_paths[] = { 1560a590b1dSMark Brown { "Headphone", NULL, "HPOUT1L" }, 1570a590b1dSMark Brown { "Headphone", NULL, "HPOUT1R" }, 1588f103167SMark Brown 1598f103167SMark Brown { "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */ 1608f103167SMark Brown { "IN1LN", NULL, "AMIC" }, 1618f103167SMark Brown 1628f103167SMark Brown { "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */ 1638f103167SMark Brown { "DMIC1DAT", NULL, "DMIC" }, 1648f103167SMark Brown { "DMIC2DAT", NULL, "DMIC" }, 1650a590b1dSMark Brown }; 1660a590b1dSMark Brown 167f2e2026cSMark Brown static struct snd_soc_jack littlemill_headset; 168f2e2026cSMark Brown 1690a590b1dSMark Brown static int littlemill_late_probe(struct snd_soc_card *card) 1700a590b1dSMark Brown { 171f2e2026cSMark Brown struct snd_soc_codec *codec = card->rtd[0].codec; 1720a590b1dSMark Brown struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; 1730a590b1dSMark Brown int ret; 1740a590b1dSMark Brown 1750a590b1dSMark Brown ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK2, 1760a590b1dSMark Brown 32768, SND_SOC_CLOCK_IN); 1770a590b1dSMark Brown if (ret < 0) 1780a590b1dSMark Brown return ret; 1790a590b1dSMark Brown 180f2e2026cSMark Brown ret = snd_soc_jack_new(codec, "Headset", 181f2e2026cSMark Brown SND_JACK_HEADSET | SND_JACK_MECHANICAL | 182f2e2026cSMark Brown SND_JACK_BTN_0 | SND_JACK_BTN_1 | 183f2e2026cSMark Brown SND_JACK_BTN_2 | SND_JACK_BTN_3 | 184f2e2026cSMark Brown SND_JACK_BTN_4 | SND_JACK_BTN_5, 185f2e2026cSMark Brown &littlemill_headset); 186f2e2026cSMark Brown if (ret) 187f2e2026cSMark Brown return ret; 188f2e2026cSMark Brown 189f2e2026cSMark Brown /* This will check device compatibility itself */ 190f2e2026cSMark Brown wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL); 191f2e2026cSMark Brown 1920a590b1dSMark Brown return 0; 1930a590b1dSMark Brown } 1940a590b1dSMark Brown 1950a590b1dSMark Brown static struct snd_soc_card littlemill = { 1960a590b1dSMark Brown .name = "Littlemill", 197*095d79dcSAxel Lin .owner = THIS_MODULE, 1980a590b1dSMark Brown .dai_link = littlemill_dai, 1990a590b1dSMark Brown .num_links = ARRAY_SIZE(littlemill_dai), 2000a590b1dSMark Brown 2010a590b1dSMark Brown .set_bias_level = littlemill_set_bias_level, 2020a590b1dSMark Brown .set_bias_level_post = littlemill_set_bias_level_post, 2030a590b1dSMark Brown 2040a590b1dSMark Brown .dapm_widgets = widgets, 2050a590b1dSMark Brown .num_dapm_widgets = ARRAY_SIZE(widgets), 2060a590b1dSMark Brown .dapm_routes = audio_paths, 2070a590b1dSMark Brown .num_dapm_routes = ARRAY_SIZE(audio_paths), 2080a590b1dSMark Brown 2090a590b1dSMark Brown .late_probe = littlemill_late_probe, 2100a590b1dSMark Brown }; 2110a590b1dSMark Brown 2120a590b1dSMark Brown static __devinit int littlemill_probe(struct platform_device *pdev) 2130a590b1dSMark Brown { 2140a590b1dSMark Brown struct snd_soc_card *card = &littlemill; 2150a590b1dSMark Brown int ret; 2160a590b1dSMark Brown 2170a590b1dSMark Brown card->dev = &pdev->dev; 2180a590b1dSMark Brown 2190a590b1dSMark Brown ret = snd_soc_register_card(card); 2200a590b1dSMark Brown if (ret) { 2210a590b1dSMark Brown dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", 2220a590b1dSMark Brown ret); 2230a590b1dSMark Brown return ret; 2240a590b1dSMark Brown } 2250a590b1dSMark Brown 2260a590b1dSMark Brown return 0; 2270a590b1dSMark Brown } 2280a590b1dSMark Brown 2290a590b1dSMark Brown static int __devexit littlemill_remove(struct platform_device *pdev) 2300a590b1dSMark Brown { 2310a590b1dSMark Brown struct snd_soc_card *card = platform_get_drvdata(pdev); 2320a590b1dSMark Brown 2330a590b1dSMark Brown snd_soc_unregister_card(card); 2340a590b1dSMark Brown 2350a590b1dSMark Brown return 0; 2360a590b1dSMark Brown } 2370a590b1dSMark Brown 2380a590b1dSMark Brown static struct platform_driver littlemill_driver = { 2390a590b1dSMark Brown .driver = { 2400a590b1dSMark Brown .name = "littlemill", 2410a590b1dSMark Brown .owner = THIS_MODULE, 2420a590b1dSMark Brown .pm = &snd_soc_pm_ops, 2430a590b1dSMark Brown }, 2440a590b1dSMark Brown .probe = littlemill_probe, 2450a590b1dSMark Brown .remove = __devexit_p(littlemill_remove), 2460a590b1dSMark Brown }; 2470a590b1dSMark Brown 2480a590b1dSMark Brown module_platform_driver(littlemill_driver); 2490a590b1dSMark Brown 2500a590b1dSMark Brown MODULE_DESCRIPTION("Littlemill audio support"); 2510a590b1dSMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 2520a590b1dSMark Brown MODULE_LICENSE("GPL"); 2530a590b1dSMark Brown MODULE_ALIAS("platform:littlemill"); 254