1/* 2 * overo.c -- SoC audio for Gumstix Overo 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 overo_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 int ret; 45 46 /* Set codec DAI configuration */ 47 ret = snd_soc_dai_set_fmt(codec_dai, 48 SND_SOC_DAIFMT_I2S | 49 SND_SOC_DAIFMT_NB_NF | 50 SND_SOC_DAIFMT_CBM_CFM); 51 if (ret < 0) { 52 printk(KERN_ERR "can't set codec DAI configuration\n"); 53 return ret; 54 } 55 56 /* Set cpu DAI configuration */ 57 ret = snd_soc_dai_set_fmt(cpu_dai, 58 SND_SOC_DAIFMT_I2S | 59 SND_SOC_DAIFMT_NB_NF | 60 SND_SOC_DAIFMT_CBM_CFM); 61 if (ret < 0) { 62 printk(KERN_ERR "can't set cpu DAI configuration\n"); 63 return ret; 64 } 65 66 /* Set the codec system clock for DAC and ADC */ 67 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000, 68 SND_SOC_CLOCK_IN); 69 if (ret < 0) { 70 printk(KERN_ERR "can't set codec system clock\n"); 71 return ret; 72 } 73 74 return 0; 75} 76 77static struct snd_soc_ops overo_ops = { 78 .hw_params = overo_hw_params, 79}; 80 81/* Digital audio interface glue - connects codec <--> CPU */ 82static struct snd_soc_dai_link overo_dai = { 83 .name = "TWL4030", 84 .stream_name = "TWL4030", 85 .cpu_dai = &omap_mcbsp_dai[0], 86 .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI], 87 .ops = &overo_ops, 88}; 89 90/* Audio machine driver */ 91static struct snd_soc_card snd_soc_card_overo = { 92 .name = "overo", 93 .platform = &omap_soc_platform, 94 .dai_link = &overo_dai, 95 .num_links = 1, 96}; 97 98/* Audio subsystem */ 99static struct snd_soc_device overo_snd_devdata = { 100 .card = &snd_soc_card_overo, 101 .codec_dev = &soc_codec_dev_twl4030, 102}; 103 104static struct platform_device *overo_snd_device; 105 106static int __init overo_soc_init(void) 107{ 108 int ret; 109 110 if (!(machine_is_overo() || machine_is_cm_t35())) { 111 pr_debug("Incomatible machine!\n"); 112 return -ENODEV; 113 } 114 printk(KERN_INFO "overo SoC init\n"); 115 116 overo_snd_device = platform_device_alloc("soc-audio", -1); 117 if (!overo_snd_device) { 118 printk(KERN_ERR "Platform device allocation failed\n"); 119 return -ENOMEM; 120 } 121 122 platform_set_drvdata(overo_snd_device, &overo_snd_devdata); 123 overo_snd_devdata.dev = &overo_snd_device->dev; 124 *(unsigned int *)overo_dai.cpu_dai->private_data = 1; /* McBSP2 */ 125 126 ret = platform_device_add(overo_snd_device); 127 if (ret) 128 goto err1; 129 130 return 0; 131 132err1: 133 printk(KERN_ERR "Unable to add platform device\n"); 134 platform_device_put(overo_snd_device); 135 136 return ret; 137} 138module_init(overo_soc_init); 139 140static void __exit overo_soc_exit(void) 141{ 142 platform_device_unregister(overo_snd_device); 143} 144module_exit(overo_soc_exit); 145 146MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>"); 147MODULE_DESCRIPTION("ALSA SoC overo"); 148MODULE_LICENSE("GPL"); 149