2 * osk5912.c -- SoC audio for OSK 5912
4 * Copyright (C) 2008 Mistral Solutions
6 * Contact: Arun KS <arunks@mistralsolutions.com>
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.
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.
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
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>
30 #include <asm/mach-types.h>
31 #include <mach/hardware.h>
32 #include <linux/gpio.h>
33 #include <plat/mcbsp.h>
35 #include "omap-mcbsp.h"
37 #include "../codecs/tlv320aic23.h"
39 #define CODEC_CLOCK 12000000
41 static struct clk *tlv320aic23_mclk;
43 static int osk_startup(struct snd_pcm_substream *substream)
45 return clk_enable(tlv320aic23_mclk);
48 static void osk_shutdown(struct snd_pcm_substream *substream)
50 clk_disable(tlv320aic23_mclk);
53 static int osk_hw_params(struct snd_pcm_substream *substream,
54 struct snd_pcm_hw_params *params)
56 struct snd_soc_pcm_runtime *rtd = substream->private_data;
57 struct snd_soc_dai *codec_dai = rtd->codec_dai;
60 /* Set the codec system clock for DAC and ADC */
62 snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
65 printk(KERN_ERR "can't set codec system clock\n");
72 static struct snd_soc_ops osk_ops = {
73 .startup = osk_startup,
74 .hw_params = osk_hw_params,
75 .shutdown = osk_shutdown,
78 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
79 SND_SOC_DAPM_HP("Headphone Jack", NULL),
80 SND_SOC_DAPM_LINE("Line In", NULL),
81 SND_SOC_DAPM_MIC("Mic Jack", NULL),
84 static const struct snd_soc_dapm_route audio_map[] = {
85 {"Headphone Jack", NULL, "LHPOUT"},
86 {"Headphone Jack", NULL, "RHPOUT"},
88 {"LLINEIN", NULL, "Line In"},
89 {"RLINEIN", NULL, "Line In"},
91 {"MICIN", NULL, "Mic Jack"},
94 static int osk_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
96 struct snd_soc_codec *codec = rtd->codec;
97 struct snd_soc_dapm_context *dapm = &codec->dapm;
99 /* Add osk5912 specific widgets */
100 snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
101 ARRAY_SIZE(tlv320aic23_dapm_widgets));
103 /* Set up osk5912 specific audio path audio_map */
104 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
106 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
107 snd_soc_dapm_enable_pin(dapm, "Line In");
108 snd_soc_dapm_enable_pin(dapm, "Mic Jack");
110 snd_soc_dapm_sync(dapm);
115 /* Digital audio interface glue - connects codec <--> CPU */
116 static struct snd_soc_dai_link osk_dai = {
117 .name = "TLV320AIC23",
118 .stream_name = "AIC23",
119 .cpu_dai_name = "omap-mcbsp-dai.0",
120 .codec_dai_name = "tlv320aic23-hifi",
121 .platform_name = "omap-pcm-audio",
122 .codec_name = "tlv320aic23-codec",
123 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
124 SND_SOC_DAIFMT_CBM_CFM,
125 .init = osk_tlv320aic23_init,
129 /* Audio machine driver */
130 static struct snd_soc_card snd_soc_card_osk = {
132 .dai_link = &osk_dai,
136 static struct platform_device *osk_snd_device;
138 static int __init osk_soc_init(void)
144 if (!(machine_is_omap_osk()))
147 osk_snd_device = platform_device_alloc("soc-audio", -1);
151 platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
152 err = platform_device_add(osk_snd_device);
156 dev = &osk_snd_device->dev;
158 tlv320aic23_mclk = clk_get(dev, "mclk");
159 if (IS_ERR(tlv320aic23_mclk)) {
160 printk(KERN_ERR "Could not get mclk clock\n");
161 err = PTR_ERR(tlv320aic23_mclk);
166 * Configure 12 MHz output on MCLK.
168 curRate = (uint) clk_get_rate(tlv320aic23_mclk);
169 if (curRate != CODEC_CLOCK) {
170 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
171 printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
177 printk(KERN_INFO "MCLK = %d [%d]\n",
178 (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
183 clk_put(tlv320aic23_mclk);
185 platform_device_del(osk_snd_device);
187 platform_device_put(osk_snd_device);
193 static void __exit osk_soc_exit(void)
195 clk_put(tlv320aic23_mclk);
196 platform_device_unregister(osk_snd_device);
199 module_init(osk_soc_init);
200 module_exit(osk_soc_exit);
202 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
203 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
204 MODULE_LICENSE("GPL");