tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
42static struct clk *tlv320aic23_mclk;
43
44static int osk_startup(struct snd_pcm_substream *substream)
45{
46 return clk_enable(tlv320aic23_mclk);
47}
48
49static void osk_shutdown(struct snd_pcm_substream *substream)
50{
51 clk_disable(tlv320aic23_mclk);
52}
53
54static 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
73static struct snd_soc_ops osk_ops = {
74 .startup = osk_startup,
75 .hw_params = osk_hw_params,
76 .shutdown = osk_shutdown,
77};
78
79static 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
85static 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 */
96static 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 */
109static 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
121static struct platform_device *osk_snd_device;
122
123static 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
167err3:
168 clk_put(tlv320aic23_mclk);
169err2:
170 platform_device_del(osk_snd_device);
171err1:
172 platform_device_put(osk_snd_device);
173
174 return err;
175
176}
177
178static void __exit osk_soc_exit(void)
179{
180 clk_put(tlv320aic23_mclk);
181 platform_device_unregister(osk_snd_device);
182}
183
184module_init(osk_soc_init);
185module_exit(osk_soc_exit);
186
187MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
188MODULE_DESCRIPTION("ALSA SoC OSK 5912");
189MODULE_LICENSE("GPL");