1/* 2 * osk5912.c -- SoC audio for OSK 5912 3 * 4 * Copyright (C) 2008 Mistral Solutions 5 * 6 * Contact: Arun KS <arunks@mistralsolutions.com> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 20 * 02110-1301 USA 21 * 22 */ 23 24#include <linux/clk.h> 25#include <linux/platform_device.h> 26#include <sound/core.h> 27#include <sound/pcm.h> 28#include <sound/soc.h> 29#include <sound/soc-dapm.h> 30 31#include <asm/mach-types.h> 32#include <mach/hardware.h> 33#include <linux/gpio.h> 34#include <plat/mcbsp.h> 35 36#include "omap-mcbsp.h" 37#include "omap-pcm.h" 38#include "../codecs/tlv320aic23.h" 39 40#define CODEC_CLOCK 12000000 41 42static struct clk *tlv320aic23_mclk; 43 44static int osk_startup(struct snd_pcm_substream *substream) 45{ 46 return clk_enable(tlv320aic23_mclk); 47} 48 49static void osk_shutdown(struct snd_pcm_substream *substream) 50{ 51 clk_disable(tlv320aic23_mclk); 52} 53 54static int osk_hw_params(struct snd_pcm_substream *substream, 55 struct snd_pcm_hw_params *params) 56{ 57 struct snd_soc_pcm_runtime *rtd = substream->private_data; 58 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; 59 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; 60 int err; 61 62 /* Set codec DAI configuration */ 63 err = snd_soc_dai_set_fmt(codec_dai, 64 SND_SOC_DAIFMT_DSP_B | 65 SND_SOC_DAIFMT_NB_NF | 66 SND_SOC_DAIFMT_CBM_CFM); 67 if (err < 0) { 68 printk(KERN_ERR "can't set codec DAI configuration\n"); 69 return err; 70 } 71 72 /* Set cpu DAI configuration */ 73 err = snd_soc_dai_set_fmt(cpu_dai, 74 SND_SOC_DAIFMT_DSP_B | 75 SND_SOC_DAIFMT_NB_NF | 76 SND_SOC_DAIFMT_CBM_CFM); 77 if (err < 0) { 78 printk(KERN_ERR "can't set cpu DAI configuration\n"); 79 return err; 80 } 81 82 /* Set the codec system clock for DAC and ADC */ 83 err = 84 snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN); 85 86 if (err < 0) { 87 printk(KERN_ERR "can't set codec system clock\n"); 88 return err; 89 } 90 91 return err; 92} 93 94static struct snd_soc_ops osk_ops = { 95 .startup = osk_startup, 96 .hw_params = osk_hw_params, 97 .shutdown = osk_shutdown, 98}; 99 100static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = { 101 SND_SOC_DAPM_HP("Headphone Jack", NULL), 102 SND_SOC_DAPM_LINE("Line In", NULL), 103 SND_SOC_DAPM_MIC("Mic Jack", NULL), 104}; 105 106static const struct snd_soc_dapm_route audio_map[] = { 107 {"Headphone Jack", NULL, "LHPOUT"}, 108 {"Headphone Jack", NULL, "RHPOUT"}, 109 110 {"LLINEIN", NULL, "Line In"}, 111 {"RLINEIN", NULL, "Line In"}, 112 113 {"MICIN", NULL, "Mic Jack"}, 114}; 115 116static int osk_tlv320aic23_init(struct snd_soc_codec *codec) 117{ 118 119 /* Add osk5912 specific widgets */ 120 snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets, 121 ARRAY_SIZE(tlv320aic23_dapm_widgets)); 122 123 /* Set up osk5912 specific audio path audio_map */ 124 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); 125 126 snd_soc_dapm_enable_pin(codec, "Headphone Jack"); 127 snd_soc_dapm_enable_pin(codec, "Line In"); 128 snd_soc_dapm_enable_pin(codec, "Mic Jack"); 129 130 snd_soc_dapm_sync(codec); 131 132 return 0; 133} 134 135/* Digital audio interface glue - connects codec <--> CPU */ 136static struct snd_soc_dai_link osk_dai = { 137 .name = "TLV320AIC23", 138 .stream_name = "AIC23", 139 .cpu_dai = &omap_mcbsp_dai[0], 140 .codec_dai = &tlv320aic23_dai, 141 .init = osk_tlv320aic23_init, 142 .ops = &osk_ops, 143}; 144 145/* Audio machine driver */ 146static struct snd_soc_card snd_soc_card_osk = { 147 .name = "OSK5912", 148 .platform = &omap_soc_platform, 149 .dai_link = &osk_dai, 150 .num_links = 1, 151}; 152 153/* Audio subsystem */ 154static struct snd_soc_device osk_snd_devdata = { 155 .card = &snd_soc_card_osk, 156 .codec_dev = &soc_codec_dev_tlv320aic23, 157}; 158 159static struct platform_device *osk_snd_device; 160 161static int __init osk_soc_init(void) 162{ 163 int err; 164 u32 curRate; 165 struct device *dev; 166 167 if (!(machine_is_omap_osk())) 168 return -ENODEV; 169 170 osk_snd_device = platform_device_alloc("soc-audio", -1); 171 if (!osk_snd_device) 172 return -ENOMEM; 173 174 platform_set_drvdata(osk_snd_device, &osk_snd_devdata); 175 osk_snd_devdata.dev = &osk_snd_device->dev; 176 *(unsigned int *)osk_dai.cpu_dai->private_data = 0; /* McBSP1 */ 177 err = platform_device_add(osk_snd_device); 178 if (err) 179 goto err1; 180 181 dev = &osk_snd_device->dev; 182 183 tlv320aic23_mclk = clk_get(dev, "mclk"); 184 if (IS_ERR(tlv320aic23_mclk)) { 185 printk(KERN_ERR "Could not get mclk clock\n"); 186 return -ENODEV; 187 } 188 189 /* 190 * Configure 12 MHz output on MCLK. 191 */ 192 curRate = (uint) clk_get_rate(tlv320aic23_mclk); 193 if (curRate != CODEC_CLOCK) { 194 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) { 195 printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n"); 196 err = -ECANCELED; 197 goto err1; 198 } 199 } 200 201 printk(KERN_INFO "MCLK = %d [%d]\n", 202 (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK); 203 204 return 0; 205err1: 206 clk_put(tlv320aic23_mclk); 207 platform_device_del(osk_snd_device); 208 platform_device_put(osk_snd_device); 209 210 return err; 211 212} 213 214static void __exit osk_soc_exit(void) 215{ 216 platform_device_unregister(osk_snd_device); 217} 218 219module_init(osk_soc_init); 220module_exit(osk_soc_exit); 221 222MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>"); 223MODULE_DESCRIPTION("ALSA SoC OSK 5912"); 224MODULE_LICENSE("GPL"); 225