1/* 2 * omap3beagle.c -- SoC audio for OMAP3 Beagle 3 * 4 * Author: Steve Sakoman <steve@sakoman.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * version 2 as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 18 * 02110-1301 USA 19 * 20 */ 21 22#include <linux/clk.h> 23#include <linux/platform_device.h> 24#include <sound/core.h> 25#include <sound/pcm.h> 26#include <sound/soc.h> 27#include <sound/soc-dapm.h> 28 29#include <asm/mach-types.h> 30#include <mach/hardware.h> 31#include <mach/gpio.h> 32#include <plat/mcbsp.h> 33 34#include "omap-mcbsp.h" 35#include "omap-pcm.h" 36#include "../codecs/twl4030.h" 37 38static int omap3beagle_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 fmt; 45 int ret; 46 47 switch (params_channels(params)) { 48 case 2: /* Stereo I2S mode */ 49 fmt = SND_SOC_DAIFMT_I2S | 50 SND_SOC_DAIFMT_NB_NF | 51 SND_SOC_DAIFMT_CBM_CFM; 52 break; 53 case 4: /* Four channel TDM mode */ 54 fmt = SND_SOC_DAIFMT_DSP_A | 55 SND_SOC_DAIFMT_IB_NF | 56 SND_SOC_DAIFMT_CBM_CFM; 57 break; 58 default: 59 return -EINVAL; 60 } 61 62 /* Set codec DAI configuration */ 63 ret = snd_soc_dai_set_fmt(codec_dai, fmt); 64 if (ret < 0) { 65 printk(KERN_ERR "can't set codec DAI configuration\n"); 66 return ret; 67 } 68 69 /* Set cpu DAI configuration */ 70 ret = snd_soc_dai_set_fmt(cpu_dai, fmt); 71 if (ret < 0) { 72 printk(KERN_ERR "can't set cpu DAI configuration\n"); 73 return ret; 74 } 75 76 /* Set the codec system clock for DAC and ADC */ 77 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000, 78 SND_SOC_CLOCK_IN); 79 if (ret < 0) { 80 printk(KERN_ERR "can't set codec system clock\n"); 81 return ret; 82 } 83 84 return 0; 85} 86 87static struct snd_soc_ops omap3beagle_ops = { 88 .hw_params = omap3beagle_hw_params, 89}; 90 91/* Digital audio interface glue - connects codec <--> CPU */ 92static struct snd_soc_dai_link omap3beagle_dai = { 93 .name = "TWL4030", 94 .stream_name = "TWL4030", 95 .cpu_dai = &omap_mcbsp_dai[0], 96 .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI], 97 .ops = &omap3beagle_ops, 98}; 99 100/* Audio machine driver */ 101static struct snd_soc_card snd_soc_omap3beagle = { 102 .name = "omap3beagle", 103 .platform = &omap_soc_platform, 104 .dai_link = &omap3beagle_dai, 105 .num_links = 1, 106}; 107 108/* Audio subsystem */ 109static struct snd_soc_device omap3beagle_snd_devdata = { 110 .card = &snd_soc_omap3beagle, 111 .codec_dev = &soc_codec_dev_twl4030, 112}; 113 114static struct platform_device *omap3beagle_snd_device; 115 116static int __init omap3beagle_soc_init(void) 117{ 118 int ret; 119 120 if (!(machine_is_omap3_beagle() || machine_is_devkit8000())) { 121 pr_debug("Not OMAP3 Beagle or Devkit8000!\n"); 122 return -ENODEV; 123 } 124 pr_info("OMAP3 Beagle/Devkit8000 SoC init\n"); 125 126 omap3beagle_snd_device = platform_device_alloc("soc-audio", -1); 127 if (!omap3beagle_snd_device) { 128 printk(KERN_ERR "Platform device allocation failed\n"); 129 return -ENOMEM; 130 } 131 132 platform_set_drvdata(omap3beagle_snd_device, &omap3beagle_snd_devdata); 133 omap3beagle_snd_devdata.dev = &omap3beagle_snd_device->dev; 134 *(unsigned int *)omap3beagle_dai.cpu_dai->private_data = 1; /* McBSP2 */ 135 136 ret = platform_device_add(omap3beagle_snd_device); 137 if (ret) 138 goto err1; 139 140 return 0; 141 142err1: 143 printk(KERN_ERR "Unable to add platform device\n"); 144 platform_device_put(omap3beagle_snd_device); 145 146 return ret; 147} 148 149static void __exit omap3beagle_soc_exit(void) 150{ 151 platform_device_unregister(omap3beagle_snd_device); 152} 153 154module_init(omap3beagle_soc_init); 155module_exit(omap3beagle_soc_exit); 156 157MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>"); 158MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle"); 159MODULE_LICENSE("GPL"); 160