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4e207873 SS |
1 | /* |
2 | * overo.c -- SoC audio for Gumstix Overo | |
3 | * | |
4 | * Author: Steve Sakoman <steve@sakoman.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * version 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <linux/clk.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <sound/core.h> | |
25 | #include <sound/pcm.h> | |
26 | #include <sound/soc.h> | |
27 | #include <sound/soc-dapm.h> | |
28 | ||
29 | #include <asm/mach-types.h> | |
30 | #include <mach/hardware.h> | |
31 | #include <mach/gpio.h> | |
32 | #include <mach/mcbsp.h> | |
33 | ||
34 | #include "omap-mcbsp.h" | |
35 | #include "omap-pcm.h" | |
36 | #include "../codecs/twl4030.h" | |
37 | ||
38 | static int overo_hw_params(struct snd_pcm_substream *substream, | |
39 | struct snd_pcm_hw_params *params) | |
40 | { | |
41 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
42 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | |
43 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
44 | int ret; | |
45 | ||
46 | /* Set codec DAI configuration */ | |
47 | ret = snd_soc_dai_set_fmt(codec_dai, | |
48 | SND_SOC_DAIFMT_I2S | | |
49 | SND_SOC_DAIFMT_NB_NF | | |
50 | SND_SOC_DAIFMT_CBM_CFM); | |
51 | if (ret < 0) { | |
52 | printk(KERN_ERR "can't set codec DAI configuration\n"); | |
53 | return ret; | |
54 | } | |
55 | ||
56 | /* Set cpu DAI configuration */ | |
57 | ret = snd_soc_dai_set_fmt(cpu_dai, | |
58 | SND_SOC_DAIFMT_I2S | | |
59 | SND_SOC_DAIFMT_NB_NF | | |
60 | SND_SOC_DAIFMT_CBM_CFM); | |
61 | if (ret < 0) { | |
62 | printk(KERN_ERR "can't set cpu DAI configuration\n"); | |
63 | return ret; | |
64 | } | |
65 | ||
66 | /* Set the codec system clock for DAC and ADC */ | |
67 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000, | |
68 | SND_SOC_CLOCK_IN); | |
69 | if (ret < 0) { | |
70 | printk(KERN_ERR "can't set codec system clock\n"); | |
71 | return ret; | |
72 | } | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
77 | static struct snd_soc_ops overo_ops = { | |
78 | .hw_params = overo_hw_params, | |
79 | }; | |
80 | ||
81 | /* Digital audio interface glue - connects codec <--> CPU */ | |
82 | static struct snd_soc_dai_link overo_dai = { | |
83 | .name = "TWL4030", | |
84 | .stream_name = "TWL4030", | |
85 | .cpu_dai = &omap_mcbsp_dai[0], | |
7154b3e8 | 86 | .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI], |
4e207873 SS |
87 | .ops = &overo_ops, |
88 | }; | |
89 | ||
90 | /* Audio machine driver */ | |
87506549 | 91 | static struct snd_soc_card snd_soc_card_overo = { |
4e207873 | 92 | .name = "overo", |
87689d56 | 93 | .platform = &omap_soc_platform, |
4e207873 SS |
94 | .dai_link = &overo_dai, |
95 | .num_links = 1, | |
96 | }; | |
97 | ||
98 | /* Audio subsystem */ | |
99 | static struct snd_soc_device overo_snd_devdata = { | |
87506549 | 100 | .card = &snd_soc_card_overo, |
4e207873 SS |
101 | .codec_dev = &soc_codec_dev_twl4030, |
102 | }; | |
103 | ||
104 | static struct platform_device *overo_snd_device; | |
105 | ||
106 | static int __init overo_soc_init(void) | |
107 | { | |
108 | int ret; | |
109 | ||
110 | if (!machine_is_overo()) { | |
111 | pr_debug("Not Overo!\n"); | |
112 | return -ENODEV; | |
113 | } | |
114 | printk(KERN_INFO "overo SoC init\n"); | |
115 | ||
116 | overo_snd_device = platform_device_alloc("soc-audio", -1); | |
117 | if (!overo_snd_device) { | |
118 | printk(KERN_ERR "Platform device allocation failed\n"); | |
119 | return -ENOMEM; | |
120 | } | |
121 | ||
122 | platform_set_drvdata(overo_snd_device, &overo_snd_devdata); | |
123 | overo_snd_devdata.dev = &overo_snd_device->dev; | |
124 | *(unsigned int *)overo_dai.cpu_dai->private_data = 1; /* McBSP2 */ | |
125 | ||
126 | ret = platform_device_add(overo_snd_device); | |
127 | if (ret) | |
128 | goto err1; | |
129 | ||
130 | return 0; | |
131 | ||
132 | err1: | |
133 | printk(KERN_ERR "Unable to add platform device\n"); | |
134 | platform_device_put(overo_snd_device); | |
135 | ||
136 | return ret; | |
137 | } | |
138 | module_init(overo_soc_init); | |
139 | ||
140 | static void __exit overo_soc_exit(void) | |
141 | { | |
142 | platform_device_unregister(overo_snd_device); | |
143 | } | |
144 | module_exit(overo_soc_exit); | |
145 | ||
146 | MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>"); | |
147 | MODULE_DESCRIPTION("ALSA SoC overo"); | |
148 | MODULE_LICENSE("GPL"); |