Merge branch 'lpc32xx/dts' of git://git.antcom.de/linux-2.6 into next/dt
[platform/adaptation/renesas_rcar/renesas_kernel.git] / sound / soc / omap / osk5912.c
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 <mach/hardware.h>
32 #include <linux/gpio.h>
33 #include <linux/module.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
42 static struct clk *tlv320aic23_mclk;
43
44 static int osk_startup(struct snd_pcm_substream *substream)
45 {
46         return clk_enable(tlv320aic23_mclk);
47 }
48
49 static void osk_shutdown(struct snd_pcm_substream *substream)
50 {
51         clk_disable(tlv320aic23_mclk);
52 }
53
54 static 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->codec_dai;
59         int err;
60
61         /* Set the codec system clock for DAC and ADC */
62         err =
63             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
64
65         if (err < 0) {
66                 printk(KERN_ERR "can't set codec system clock\n");
67                 return err;
68         }
69
70         return err;
71 }
72
73 static struct snd_soc_ops osk_ops = {
74         .startup = osk_startup,
75         .hw_params = osk_hw_params,
76         .shutdown = osk_shutdown,
77 };
78
79 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
80         SND_SOC_DAPM_HP("Headphone Jack", NULL),
81         SND_SOC_DAPM_LINE("Line In", NULL),
82         SND_SOC_DAPM_MIC("Mic Jack", NULL),
83 };
84
85 static const struct snd_soc_dapm_route audio_map[] = {
86         {"Headphone Jack", NULL, "LHPOUT"},
87         {"Headphone Jack", NULL, "RHPOUT"},
88
89         {"LLINEIN", NULL, "Line In"},
90         {"RLINEIN", NULL, "Line In"},
91
92         {"MICIN", NULL, "Mic Jack"},
93 };
94
95 /* Digital audio interface glue - connects codec <--> CPU */
96 static struct snd_soc_dai_link osk_dai = {
97         .name = "TLV320AIC23",
98         .stream_name = "AIC23",
99         .cpu_dai_name = "omap-mcbsp.1",
100         .codec_dai_name = "tlv320aic23-hifi",
101         .platform_name = "omap-pcm-audio",
102         .codec_name = "tlv320aic23-codec",
103         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
104                    SND_SOC_DAIFMT_CBM_CFM,
105         .ops = &osk_ops,
106 };
107
108 /* Audio machine driver */
109 static struct snd_soc_card snd_soc_card_osk = {
110         .name = "OSK5912",
111         .owner = THIS_MODULE,
112         .dai_link = &osk_dai,
113         .num_links = 1,
114
115         .dapm_widgets = tlv320aic23_dapm_widgets,
116         .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
117         .dapm_routes = audio_map,
118         .num_dapm_routes = ARRAY_SIZE(audio_map),
119 };
120
121 static struct platform_device *osk_snd_device;
122
123 static int __init osk_soc_init(void)
124 {
125         int err;
126         u32 curRate;
127         struct device *dev;
128
129         if (!(machine_is_omap_osk()))
130                 return -ENODEV;
131
132         osk_snd_device = platform_device_alloc("soc-audio", -1);
133         if (!osk_snd_device)
134                 return -ENOMEM;
135
136         platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
137         err = platform_device_add(osk_snd_device);
138         if (err)
139                 goto err1;
140
141         dev = &osk_snd_device->dev;
142
143         tlv320aic23_mclk = clk_get(dev, "mclk");
144         if (IS_ERR(tlv320aic23_mclk)) {
145                 printk(KERN_ERR "Could not get mclk clock\n");
146                 err = PTR_ERR(tlv320aic23_mclk);
147                 goto err2;
148         }
149
150         /*
151          * Configure 12 MHz output on MCLK.
152          */
153         curRate = (uint) clk_get_rate(tlv320aic23_mclk);
154         if (curRate != CODEC_CLOCK) {
155                 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
156                         printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
157                         err = -ECANCELED;
158                         goto err3;
159                 }
160         }
161
162         printk(KERN_INFO "MCLK = %d [%d]\n",
163                (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
164
165         return 0;
166
167 err3:
168         clk_put(tlv320aic23_mclk);
169 err2:
170         platform_device_del(osk_snd_device);
171 err1:
172         platform_device_put(osk_snd_device);
173
174         return err;
175
176 }
177
178 static void __exit osk_soc_exit(void)
179 {
180         clk_put(tlv320aic23_mclk);
181         platform_device_unregister(osk_snd_device);
182 }
183
184 module_init(osk_soc_init);
185 module_exit(osk_soc_exit);
186
187 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
188 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
189 MODULE_LICENSE("GPL");