]> Pileus Git - ~andy/linux/blob - sound/soc/omap/osk5912.c
Merge branch 'for-3.1' into for-3.2
[~andy/linux] / 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 <plat/mcbsp.h>
34
35 #include "omap-mcbsp.h"
36 #include "omap-pcm.h"
37 #include "../codecs/tlv320aic23.h"
38
39 #define CODEC_CLOCK     12000000
40
41 static struct clk *tlv320aic23_mclk;
42
43 static int osk_startup(struct snd_pcm_substream *substream)
44 {
45         return clk_enable(tlv320aic23_mclk);
46 }
47
48 static void osk_shutdown(struct snd_pcm_substream *substream)
49 {
50         clk_disable(tlv320aic23_mclk);
51 }
52
53 static int osk_hw_params(struct snd_pcm_substream *substream,
54                          struct snd_pcm_hw_params *params)
55 {
56         struct snd_soc_pcm_runtime *rtd = substream->private_data;
57         struct snd_soc_dai *codec_dai = rtd->codec_dai;
58         int err;
59
60         /* Set the codec system clock for DAC and ADC */
61         err =
62             snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
63
64         if (err < 0) {
65                 printk(KERN_ERR "can't set codec system clock\n");
66                 return err;
67         }
68
69         return err;
70 }
71
72 static struct snd_soc_ops osk_ops = {
73         .startup = osk_startup,
74         .hw_params = osk_hw_params,
75         .shutdown = osk_shutdown,
76 };
77
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),
82 };
83
84 static const struct snd_soc_dapm_route audio_map[] = {
85         {"Headphone Jack", NULL, "LHPOUT"},
86         {"Headphone Jack", NULL, "RHPOUT"},
87
88         {"LLINEIN", NULL, "Line In"},
89         {"RLINEIN", NULL, "Line In"},
90
91         {"MICIN", NULL, "Mic Jack"},
92 };
93
94 static int osk_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
95 {
96         struct snd_soc_codec *codec = rtd->codec;
97         struct snd_soc_dapm_context *dapm = &codec->dapm;
98
99         /* Add osk5912 specific widgets */
100         snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
101                                   ARRAY_SIZE(tlv320aic23_dapm_widgets));
102
103         /* Set up osk5912 specific audio path audio_map */
104         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
105
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");
109
110         snd_soc_dapm_sync(dapm);
111
112         return 0;
113 }
114
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,
126         .ops = &osk_ops,
127 };
128
129 /* Audio machine driver */
130 static struct snd_soc_card snd_soc_card_osk = {
131         .name = "OSK5912",
132         .dai_link = &osk_dai,
133         .num_links = 1,
134 };
135
136 static struct platform_device *osk_snd_device;
137
138 static int __init osk_soc_init(void)
139 {
140         int err;
141         u32 curRate;
142         struct device *dev;
143
144         if (!(machine_is_omap_osk()))
145                 return -ENODEV;
146
147         osk_snd_device = platform_device_alloc("soc-audio", -1);
148         if (!osk_snd_device)
149                 return -ENOMEM;
150
151         platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
152         err = platform_device_add(osk_snd_device);
153         if (err)
154                 goto err1;
155
156         dev = &osk_snd_device->dev;
157
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);
162                 goto err2;
163         }
164
165         /*
166          * Configure 12 MHz output on MCLK.
167          */
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");
172                         err = -ECANCELED;
173                         goto err3;
174                 }
175         }
176
177         printk(KERN_INFO "MCLK = %d [%d]\n",
178                (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
179
180         return 0;
181
182 err3:
183         clk_put(tlv320aic23_mclk);
184 err2:
185         platform_device_del(osk_snd_device);
186 err1:
187         platform_device_put(osk_snd_device);
188
189         return err;
190
191 }
192
193 static void __exit osk_soc_exit(void)
194 {
195         clk_put(tlv320aic23_mclk);
196         platform_device_unregister(osk_snd_device);
197 }
198
199 module_init(osk_soc_init);
200 module_exit(osk_soc_exit);
201
202 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
203 MODULE_DESCRIPTION("ALSA SoC OSK 5912");
204 MODULE_LICENSE("GPL");