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 30 #include <asm/mach-types.h> 31 #include <linux/gpio.h> 32 #include <linux/module.h> 33 #include <linux/platform_data/asoc-ti-mcbsp.h> 34 35 #include "omap-mcbsp.h" 36 #include "../codecs/tlv320aic23.h" 37 38 #define CODEC_CLOCK 12000000 39 40 static struct clk *tlv320aic23_mclk; 41 42 static int osk_startup(struct snd_pcm_substream *substream) 43 { 44 return clk_enable(tlv320aic23_mclk); 45 } 46 47 static void osk_shutdown(struct snd_pcm_substream *substream) 48 { 49 clk_disable(tlv320aic23_mclk); 50 } 51 52 static int osk_hw_params(struct snd_pcm_substream *substream, 53 struct snd_pcm_hw_params *params) 54 { 55 struct snd_soc_pcm_runtime *rtd = substream->private_data; 56 struct snd_soc_dai *codec_dai = rtd->codec_dai; 57 int err; 58 59 /* Set the codec system clock for DAC and ADC */ 60 err = 61 snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN); 62 63 if (err < 0) { 64 printk(KERN_ERR "can't set codec system clock\n"); 65 return err; 66 } 67 68 return err; 69 } 70 71 static const struct snd_soc_ops osk_ops = { 72 .startup = osk_startup, 73 .hw_params = osk_hw_params, 74 .shutdown = osk_shutdown, 75 }; 76 77 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = { 78 SND_SOC_DAPM_HP("Headphone Jack", NULL), 79 SND_SOC_DAPM_LINE("Line In", NULL), 80 SND_SOC_DAPM_MIC("Mic Jack", NULL), 81 }; 82 83 static const struct snd_soc_dapm_route audio_map[] = { 84 {"Headphone Jack", NULL, "LHPOUT"}, 85 {"Headphone Jack", NULL, "RHPOUT"}, 86 87 {"LLINEIN", NULL, "Line In"}, 88 {"RLINEIN", NULL, "Line In"}, 89 90 {"MICIN", NULL, "Mic Jack"}, 91 }; 92 93 /* Digital audio interface glue - connects codec <--> CPU */ 94 static struct snd_soc_dai_link osk_dai = { 95 .name = "TLV320AIC23", 96 .stream_name = "AIC23", 97 .cpu_dai_name = "omap-mcbsp.1", 98 .codec_dai_name = "tlv320aic23-hifi", 99 .platform_name = "omap-mcbsp.1", 100 .codec_name = "tlv320aic23-codec", 101 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF | 102 SND_SOC_DAIFMT_CBM_CFM, 103 .ops = &osk_ops, 104 }; 105 106 /* Audio machine driver */ 107 static struct snd_soc_card snd_soc_card_osk = { 108 .name = "OSK5912", 109 .owner = THIS_MODULE, 110 .dai_link = &osk_dai, 111 .num_links = 1, 112 113 .dapm_widgets = tlv320aic23_dapm_widgets, 114 .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets), 115 .dapm_routes = audio_map, 116 .num_dapm_routes = ARRAY_SIZE(audio_map), 117 }; 118 119 static struct platform_device *osk_snd_device; 120 121 static int __init osk_soc_init(void) 122 { 123 int err; 124 u32 curRate; 125 struct device *dev; 126 127 if (!(machine_is_omap_osk())) 128 return -ENODEV; 129 130 osk_snd_device = platform_device_alloc("soc-audio", -1); 131 if (!osk_snd_device) 132 return -ENOMEM; 133 134 platform_set_drvdata(osk_snd_device, &snd_soc_card_osk); 135 err = platform_device_add(osk_snd_device); 136 if (err) 137 goto err1; 138 139 dev = &osk_snd_device->dev; 140 141 tlv320aic23_mclk = clk_get(dev, "mclk"); 142 if (IS_ERR(tlv320aic23_mclk)) { 143 printk(KERN_ERR "Could not get mclk clock\n"); 144 err = PTR_ERR(tlv320aic23_mclk); 145 goto err2; 146 } 147 148 /* 149 * Configure 12 MHz output on MCLK. 150 */ 151 curRate = (uint) clk_get_rate(tlv320aic23_mclk); 152 if (curRate != CODEC_CLOCK) { 153 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) { 154 printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n"); 155 err = -ECANCELED; 156 goto err3; 157 } 158 } 159 160 printk(KERN_INFO "MCLK = %d [%d]\n", 161 (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK); 162 163 return 0; 164 165 err3: 166 clk_put(tlv320aic23_mclk); 167 err2: 168 platform_device_del(osk_snd_device); 169 err1: 170 platform_device_put(osk_snd_device); 171 172 return err; 173 174 } 175 176 static void __exit osk_soc_exit(void) 177 { 178 clk_put(tlv320aic23_mclk); 179 platform_device_unregister(osk_snd_device); 180 } 181 182 module_init(osk_soc_init); 183 module_exit(osk_soc_exit); 184 185 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>"); 186 MODULE_DESCRIPTION("ALSA SoC OSK 5912"); 187 MODULE_LICENSE("GPL"); 188