1/* 2 * linux/sound/soc/pxa/z2.c 3 * 4 * SoC Audio driver for Aeronix Zipit Z2 5 * 6 * Copyright (C) 2009 Ken McGuire <kenm@desertweyr.com> 7 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14#include <linux/module.h> 15#include <linux/moduleparam.h> 16#include <linux/timer.h> 17#include <linux/interrupt.h> 18#include <linux/platform_device.h> 19#include <linux/gpio.h> 20 21#include <sound/core.h> 22#include <sound/pcm.h> 23#include <sound/soc.h> 24#include <sound/soc-dapm.h> 25#include <sound/jack.h> 26 27#include <asm/mach-types.h> 28#include <mach/hardware.h> 29#include <mach/audio.h> 30#include <mach/z2.h> 31 32#include "../codecs/wm8750.h" 33#include "pxa2xx-pcm.h" 34#include "pxa2xx-i2s.h" 35 36static struct snd_soc_card snd_soc_z2; 37 38static int z2_hw_params(struct snd_pcm_substream *substream, 39 struct snd_pcm_hw_params *params) 40{ 41 struct snd_soc_pcm_runtime *rtd = substream->private_data; 42 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; 43 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; 44 unsigned int clk = 0; 45 int ret = 0; 46 47 switch (params_rate(params)) { 48 case 8000: 49 case 16000: 50 case 48000: 51 case 96000: 52 clk = 12288000; 53 break; 54 case 11025: 55 case 22050: 56 case 44100: 57 clk = 11289600; 58 break; 59 } 60 61 /* set codec DAI configuration */ 62 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | 63 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); 64 if (ret < 0) 65 return ret; 66 67 /* set cpu DAI configuration */ 68 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | 69 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); 70 if (ret < 0) 71 return ret; 72 73 /* set the codec system clock for DAC and ADC */ 74 ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk, 75 SND_SOC_CLOCK_IN); 76 if (ret < 0) 77 return ret; 78 79 /* set the I2S system clock as input (unused) */ 80 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0, 81 SND_SOC_CLOCK_IN); 82 if (ret < 0) 83 return ret; 84 85 return 0; 86} 87 88static struct snd_soc_jack hs_jack; 89 90/* Headset jack detection DAPM pins */ 91static struct snd_soc_jack_pin hs_jack_pins[] = { 92 { 93 .pin = "Mic Jack", 94 .mask = SND_JACK_MICROPHONE, 95 }, 96 { 97 .pin = "Headphone Jack", 98 .mask = SND_JACK_HEADPHONE, 99 }, 100}; 101 102/* Headset jack detection gpios */ 103static struct snd_soc_jack_gpio hs_jack_gpios[] = { 104 { 105 .gpio = GPIO37_ZIPITZ2_HEADSET_DETECT, 106 .name = "hsdet-gpio", 107 .report = SND_JACK_HEADSET, 108 .debounce_time = 200, 109 }, 110}; 111 112/* z2 machine dapm widgets */ 113static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = { 114 SND_SOC_DAPM_HP("Headphone Jack", NULL), 115 SND_SOC_DAPM_MIC("Mic Jack", NULL), 116 SND_SOC_DAPM_SPK("Ext Spk", NULL), 117 118 /* headset is a mic and mono headphone */ 119 SND_SOC_DAPM_HP("Headset Jack", NULL), 120}; 121 122/* Z2 machine audio_map */ 123static const struct snd_soc_dapm_route audio_map[] = { 124 125 /* headphone connected to LOUT1, ROUT1 */ 126 {"Headphone Jack", NULL, "LOUT1"}, 127 {"Headphone Jack", NULL, "ROUT1"}, 128 129 /* ext speaker connected to LOUT2, ROUT2 */ 130 {"Ext Spk", NULL , "ROUT2"}, 131 {"Ext Spk", NULL , "LOUT2"}, 132 133 /* mic is connected to R input 2 - with bias */ 134 {"RINPUT2", NULL, "Mic Bias"}, 135 {"Mic Bias", NULL, "Mic Jack"}, 136}; 137 138/* 139 * Logic for a wm8750 as connected on a Z2 Device 140 */ 141static int z2_wm8750_init(struct snd_soc_codec *codec) 142{ 143 int ret; 144 145 /* NC codec pins */ 146 snd_soc_dapm_disable_pin(codec, "LINPUT3"); 147 snd_soc_dapm_disable_pin(codec, "RINPUT3"); 148 snd_soc_dapm_disable_pin(codec, "OUT3"); 149 snd_soc_dapm_disable_pin(codec, "MONO"); 150 151 /* Add z2 specific widgets */ 152 snd_soc_dapm_new_controls(codec, wm8750_dapm_widgets, 153 ARRAY_SIZE(wm8750_dapm_widgets)); 154 155 /* Set up z2 specific audio paths */ 156 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 157 158 ret = snd_soc_dapm_sync(codec); 159 if (ret) 160 goto err; 161 162 /* Jack detection API stuff */ 163 ret = snd_soc_jack_new(&snd_soc_z2, "Headset Jack", SND_JACK_HEADSET, 164 &hs_jack); 165 if (ret) 166 goto err; 167 168 ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins), 169 hs_jack_pins); 170 if (ret) 171 goto err; 172 173 ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios), 174 hs_jack_gpios); 175 if (ret) 176 goto err; 177 178 return 0; 179 180err: 181 return ret; 182} 183 184static struct snd_soc_ops z2_ops = { 185 .hw_params = z2_hw_params, 186}; 187 188/* z2 digital audio interface glue - connects codec <--> CPU */ 189static struct snd_soc_dai_link z2_dai = { 190 .name = "wm8750", 191 .stream_name = "WM8750", 192 .cpu_dai = &pxa_i2s_dai, 193 .codec_dai = &wm8750_dai, 194 .init = z2_wm8750_init, 195 .ops = &z2_ops, 196}; 197 198/* z2 audio machine driver */ 199static struct snd_soc_card snd_soc_z2 = { 200 .name = "Z2", 201 .platform = &pxa2xx_soc_platform, 202 .dai_link = &z2_dai, 203 .num_links = 1, 204}; 205 206/* z2 audio subsystem */ 207static struct snd_soc_device z2_snd_devdata = { 208 .card = &snd_soc_z2, 209 .codec_dev = &soc_codec_dev_wm8750, 210}; 211 212static struct platform_device *z2_snd_device; 213 214static int __init z2_init(void) 215{ 216 int ret; 217 218 if (!machine_is_zipit2()) 219 return -ENODEV; 220 221 z2_snd_device = platform_device_alloc("soc-audio", -1); 222 if (!z2_snd_device) 223 return -ENOMEM; 224 225 platform_set_drvdata(z2_snd_device, &z2_snd_devdata); 226 z2_snd_devdata.dev = &z2_snd_device->dev; 227 ret = platform_device_add(z2_snd_device); 228 229 if (ret) 230 platform_device_put(z2_snd_device); 231 232 return ret; 233} 234 235static void __exit z2_exit(void) 236{ 237 platform_device_unregister(z2_snd_device); 238} 239 240module_init(z2_init); 241module_exit(z2_exit); 242 243MODULE_AUTHOR("Ken McGuire <kenm@desertweyr.com>, " 244 "Marek Vasut <marek.vasut@gmail.com>"); 245MODULE_DESCRIPTION("ALSA SoC ZipitZ2"); 246MODULE_LICENSE("GPL"); 247