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dc06102a SS |
1 | /* |
2 | * omap3beagle.c -- SoC audio for OMAP3 Beagle | |
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 omap3beagle_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; | |
a8353a57 | 44 | unsigned int fmt; |
dc06102a SS |
45 | int ret; |
46 | ||
a8353a57 PU |
47 | switch (params_channels(params)) { |
48 | case 2: /* Stereo I2S mode */ | |
49 | fmt = SND_SOC_DAIFMT_I2S | | |
50 | SND_SOC_DAIFMT_NB_NF | | |
51 | SND_SOC_DAIFMT_CBM_CFM; | |
52 | break; | |
53 | case 4: /* Four channel TDM mode */ | |
54 | fmt = SND_SOC_DAIFMT_DSP_A | | |
55 | SND_SOC_DAIFMT_IB_NF | | |
56 | SND_SOC_DAIFMT_CBM_CFM; | |
57 | break; | |
58 | default: | |
59 | return -EINVAL; | |
60 | } | |
61 | ||
dc06102a | 62 | /* Set codec DAI configuration */ |
a8353a57 | 63 | ret = snd_soc_dai_set_fmt(codec_dai, fmt); |
dc06102a SS |
64 | if (ret < 0) { |
65 | printk(KERN_ERR "can't set codec DAI configuration\n"); | |
66 | return ret; | |
67 | } | |
68 | ||
69 | /* Set cpu DAI configuration */ | |
a8353a57 | 70 | ret = snd_soc_dai_set_fmt(cpu_dai, fmt); |
dc06102a SS |
71 | if (ret < 0) { |
72 | printk(KERN_ERR "can't set cpu DAI configuration\n"); | |
73 | return ret; | |
74 | } | |
75 | ||
76 | /* Set the codec system clock for DAC and ADC */ | |
77 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000, | |
78 | SND_SOC_CLOCK_IN); | |
79 | if (ret < 0) { | |
80 | printk(KERN_ERR "can't set codec system clock\n"); | |
81 | return ret; | |
82 | } | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
87 | static struct snd_soc_ops omap3beagle_ops = { | |
88 | .hw_params = omap3beagle_hw_params, | |
89 | }; | |
90 | ||
91 | /* Digital audio interface glue - connects codec <--> CPU */ | |
92 | static struct snd_soc_dai_link omap3beagle_dai = { | |
93 | .name = "TWL4030", | |
94 | .stream_name = "TWL4030", | |
95 | .cpu_dai = &omap_mcbsp_dai[0], | |
7154b3e8 | 96 | .codec_dai = &twl4030_dai[TWL4030_DAI_HIFI], |
dc06102a SS |
97 | .ops = &omap3beagle_ops, |
98 | }; | |
99 | ||
100 | /* Audio machine driver */ | |
87506549 | 101 | static struct snd_soc_card snd_soc_omap3beagle = { |
dc06102a | 102 | .name = "omap3beagle", |
87689d56 | 103 | .platform = &omap_soc_platform, |
dc06102a SS |
104 | .dai_link = &omap3beagle_dai, |
105 | .num_links = 1, | |
106 | }; | |
107 | ||
108 | /* Audio subsystem */ | |
109 | static struct snd_soc_device omap3beagle_snd_devdata = { | |
87506549 | 110 | .card = &snd_soc_omap3beagle, |
dc06102a SS |
111 | .codec_dev = &soc_codec_dev_twl4030, |
112 | }; | |
113 | ||
114 | static struct platform_device *omap3beagle_snd_device; | |
115 | ||
116 | static int __init omap3beagle_soc_init(void) | |
117 | { | |
118 | int ret; | |
119 | ||
120 | if (!machine_is_omap3_beagle()) { | |
121 | pr_debug("Not OMAP3 Beagle!\n"); | |
122 | return -ENODEV; | |
123 | } | |
124 | pr_info("OMAP3 Beagle SoC init\n"); | |
125 | ||
126 | omap3beagle_snd_device = platform_device_alloc("soc-audio", -1); | |
127 | if (!omap3beagle_snd_device) { | |
128 | printk(KERN_ERR "Platform device allocation failed\n"); | |
129 | return -ENOMEM; | |
130 | } | |
131 | ||
132 | platform_set_drvdata(omap3beagle_snd_device, &omap3beagle_snd_devdata); | |
133 | omap3beagle_snd_devdata.dev = &omap3beagle_snd_device->dev; | |
134 | *(unsigned int *)omap3beagle_dai.cpu_dai->private_data = 1; /* McBSP2 */ | |
135 | ||
136 | ret = platform_device_add(omap3beagle_snd_device); | |
137 | if (ret) | |
138 | goto err1; | |
139 | ||
140 | return 0; | |
141 | ||
142 | err1: | |
143 | printk(KERN_ERR "Unable to add platform device\n"); | |
144 | platform_device_put(omap3beagle_snd_device); | |
145 | ||
146 | return ret; | |
147 | } | |
148 | ||
149 | static void __exit omap3beagle_soc_exit(void) | |
150 | { | |
151 | platform_device_unregister(omap3beagle_snd_device); | |
152 | } | |
153 | ||
154 | module_init(omap3beagle_soc_init); | |
155 | module_exit(omap3beagle_soc_exit); | |
156 | ||
157 | MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>"); | |
158 | MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle"); | |
159 | MODULE_LICENSE("GPL"); |