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df573d2f AK |
1 | /* |
2 | * omap2evm.c -- SoC audio machine driver for omap2evm board | |
3 | * | |
4 | * Author: Arun KS <arunks@mistralsolutions.com> | |
5 | * | |
6 | * Based on sound/soc/omap/overo.c by Steve Sakoman | |
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 | #include <sound/soc-dapm.h> | |
30 | ||
31 | #include <asm/mach-types.h> | |
32 | #include <mach/hardware.h> | |
33 | #include <mach/gpio.h> | |
34 | #include <mach/mcbsp.h> | |
35 | ||
36 | #include "omap-mcbsp.h" | |
37 | #include "omap-pcm.h" | |
38 | #include "../codecs/twl4030.h" | |
39 | ||
40 | static int omap2evm_hw_params(struct snd_pcm_substream *substream, | |
41 | struct snd_pcm_hw_params *params) | |
42 | { | |
43 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
44 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | |
45 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
46 | int ret; | |
47 | ||
48 | /* Set codec DAI configuration */ | |
49 | ret = snd_soc_dai_set_fmt(codec_dai, | |
50 | SND_SOC_DAIFMT_I2S | | |
51 | SND_SOC_DAIFMT_NB_NF | | |
52 | SND_SOC_DAIFMT_CBM_CFM); | |
53 | if (ret < 0) { | |
54 | printk(KERN_ERR "can't set codec DAI configuration\n"); | |
55 | return ret; | |
56 | } | |
57 | ||
58 | /* Set cpu DAI configuration */ | |
59 | ret = snd_soc_dai_set_fmt(cpu_dai, | |
60 | SND_SOC_DAIFMT_I2S | | |
61 | SND_SOC_DAIFMT_NB_NF | | |
62 | SND_SOC_DAIFMT_CBM_CFM); | |
63 | if (ret < 0) { | |
64 | printk(KERN_ERR "can't set cpu DAI configuration\n"); | |
65 | return ret; | |
66 | } | |
67 | ||
68 | /* Set the codec system clock for DAC and ADC */ | |
69 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000, | |
70 | SND_SOC_CLOCK_IN); | |
71 | if (ret < 0) { | |
72 | printk(KERN_ERR "can't set codec system clock\n"); | |
73 | return ret; | |
74 | } | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static struct snd_soc_ops omap2evm_ops = { | |
80 | .hw_params = omap2evm_hw_params, | |
81 | }; | |
82 | ||
83 | /* Digital audio interface glue - connects codec <--> CPU */ | |
84 | static struct snd_soc_dai_link omap2evm_dai = { | |
85 | .name = "TWL4030", | |
86 | .stream_name = "TWL4030", | |
87 | .cpu_dai = &omap_mcbsp_dai[0], | |
88 | .codec_dai = &twl4030_dai, | |
89 | .ops = &omap2evm_ops, | |
90 | }; | |
91 | ||
92 | /* Audio machine driver */ | |
87506549 | 93 | static struct snd_soc_card snd_soc_omap2evm = { |
df573d2f AK |
94 | .name = "omap2evm", |
95 | .dai_link = &omap2evm_dai, | |
96 | .num_links = 1, | |
97 | }; | |
98 | ||
99 | /* Audio subsystem */ | |
100 | static struct snd_soc_device omap2evm_snd_devdata = { | |
87506549 | 101 | .card = &snd_soc_omap2evm, |
df573d2f AK |
102 | .platform = &omap_soc_platform, |
103 | .codec_dev = &soc_codec_dev_twl4030, | |
104 | }; | |
105 | ||
106 | static struct platform_device *omap2evm_snd_device; | |
107 | ||
108 | static int __init omap2evm_soc_init(void) | |
109 | { | |
110 | int ret; | |
111 | ||
112 | if (!machine_is_omap2evm()) { | |
113 | pr_debug("Not omap2evm!\n"); | |
114 | return -ENODEV; | |
115 | } | |
116 | printk(KERN_INFO "omap2evm SoC init\n"); | |
117 | ||
118 | omap2evm_snd_device = platform_device_alloc("soc-audio", -1); | |
119 | if (!omap2evm_snd_device) { | |
120 | printk(KERN_ERR "Platform device allocation failed\n"); | |
121 | return -ENOMEM; | |
122 | } | |
123 | ||
124 | platform_set_drvdata(omap2evm_snd_device, &omap2evm_snd_devdata); | |
125 | omap2evm_snd_devdata.dev = &omap2evm_snd_device->dev; | |
126 | *(unsigned int *)omap2evm_dai.cpu_dai->private_data = 1; /* McBSP2 */ | |
127 | ||
128 | ret = platform_device_add(omap2evm_snd_device); | |
129 | if (ret) | |
130 | goto err1; | |
131 | ||
132 | return 0; | |
133 | ||
134 | err1: | |
135 | printk(KERN_ERR "Unable to add platform device\n"); | |
136 | platform_device_put(omap2evm_snd_device); | |
137 | ||
138 | return ret; | |
139 | } | |
140 | module_init(omap2evm_soc_init); | |
141 | ||
142 | static void __exit omap2evm_soc_exit(void) | |
143 | { | |
144 | platform_device_unregister(omap2evm_snd_device); | |
145 | } | |
146 | module_exit(omap2evm_soc_exit); | |
147 | ||
148 | MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>"); | |
149 | MODULE_DESCRIPTION("ALSA SoC omap2evm"); | |
150 | MODULE_LICENSE("GPL"); |