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Linux/sound/soc/atmel/snd-soc-afeb9260.c

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  1 /*
  2  * afeb9260.c  --  SoC audio for AFEB9260
  3  *
  4  * Copyright (C) 2009 Sergey Lapin <slapin@ossfans.org>
  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/module.h>
 23 #include <linux/moduleparam.h>
 24 #include <linux/kernel.h>
 25 #include <linux/clk.h>
 26 #include <linux/platform_device.h>
 27 
 28 #include <linux/atmel-ssc.h>
 29 #include <sound/core.h>
 30 #include <sound/pcm.h>
 31 #include <sound/pcm_params.h>
 32 #include <sound/soc.h>
 33 
 34 #include <asm/mach-types.h>
 35 #include <mach/hardware.h>
 36 #include <linux/gpio.h>
 37 
 38 #include "../codecs/tlv320aic23.h"
 39 #include "atmel-pcm.h"
 40 #include "atmel_ssc_dai.h"
 41 
 42 #define CODEC_CLOCK     12000000
 43 
 44 static int afeb9260_hw_params(struct snd_pcm_substream *substream,
 45                          struct snd_pcm_hw_params *params)
 46 {
 47         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 48         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 49         int err;
 50 
 51         /* Set the codec system clock for DAC and ADC */
 52         err =
 53             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
 54 
 55         if (err < 0) {
 56                 printk(KERN_ERR "can't set codec system clock\n");
 57                 return err;
 58         }
 59 
 60         return err;
 61 }
 62 
 63 static struct snd_soc_ops afeb9260_ops = {
 64         .hw_params = afeb9260_hw_params,
 65 };
 66 
 67 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 68         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 69         SND_SOC_DAPM_LINE("Line In", NULL),
 70         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 71 };
 72 
 73 static const struct snd_soc_dapm_route afeb9260_audio_map[] = {
 74         {"Headphone Jack", NULL, "LHPOUT"},
 75         {"Headphone Jack", NULL, "RHPOUT"},
 76 
 77         {"LLINEIN", NULL, "Line In"},
 78         {"RLINEIN", NULL, "Line In"},
 79 
 80         {"MICIN", NULL, "Mic Jack"},
 81 };
 82 
 83 static int afeb9260_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
 84 {
 85         struct snd_soc_codec *codec = rtd->codec;
 86         struct snd_soc_dapm_context *dapm = &codec->dapm;
 87 
 88         snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
 89         snd_soc_dapm_enable_pin(dapm, "Line In");
 90         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
 91 
 92         return 0;
 93 }
 94 
 95 /* Digital audio interface glue - connects codec <--> CPU */
 96 static struct snd_soc_dai_link afeb9260_dai = {
 97         .name = "TLV320AIC23",
 98         .stream_name = "AIC23",
 99         .cpu_dai_name = "atmel-ssc-dai.0",
100         .codec_dai_name = "tlv320aic23-hifi",
101         .platform_name = "atmel_pcm-audio",
102         .codec_name = "tlv320aic23-codec.0-001a",
103         .init = afeb9260_tlv320aic23_init,
104         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
105                    SND_SOC_DAIFMT_CBM_CFM,
106         .ops = &afeb9260_ops,
107 };
108 
109 /* Audio machine driver */
110 static struct snd_soc_card snd_soc_machine_afeb9260 = {
111         .name = "AFEB9260",
112         .owner = THIS_MODULE,
113         .dai_link = &afeb9260_dai,
114         .num_links = 1,
115 
116         .dapm_widgets = tlv320aic23_dapm_widgets,
117         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
118         .dapm_routes = afeb9260_audio_map,
119         .num_dapm_routes = ARRAY_SIZE(afeb9260_audio_map),
120 };
121 
122 static struct platform_device *afeb9260_snd_device;
123 
124 static int __init afeb9260_soc_init(void)
125 {
126         int err;
127         struct device *dev;
128 
129         if (!(machine_is_afeb9260()))
130                 return -ENODEV;
131 
132 
133         afeb9260_snd_device = platform_device_alloc("soc-audio", -1);
134         if (!afeb9260_snd_device) {
135                 printk(KERN_ERR "ASoC: Platform device allocation failed\n");
136                 return -ENOMEM;
137         }
138 
139         platform_set_drvdata(afeb9260_snd_device, &snd_soc_machine_afeb9260);
140         err = platform_device_add(afeb9260_snd_device);
141         if (err)
142                 goto err1;
143 
144         dev = &afeb9260_snd_device->dev;
145 
146         return 0;
147 err1:
148         platform_device_put(afeb9260_snd_device);
149         return err;
150 }
151 
152 static void __exit afeb9260_soc_exit(void)
153 {
154         platform_device_unregister(afeb9260_snd_device);
155 }
156 
157 module_init(afeb9260_soc_init);
158 module_exit(afeb9260_soc_exit);
159 
160 MODULE_AUTHOR("Sergey Lapin <slapin@ossfans.org>");
161 MODULE_DESCRIPTION("ALSA SoC for AFEB9260");
162 MODULE_LICENSE("GPL");
163 
164 

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