2 * ASoC driver for TI DAVINCI EVM platform
4 * Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
5 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/timer.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/soc.h>
20 #include <sound/soc-dapm.h>
22 #include <asm/mach-types.h>
24 #include <asm/arch/hardware.h>
26 #include "../codecs/tlv320aic3x.h"
27 #include "davinci-pcm.h"
28 #include "davinci-i2s.h"
30 #define EVM_CODEC_CLOCK 22579200
32 static int evm_hw_params(struct snd_pcm_substream *substream,
33 struct snd_pcm_hw_params *params)
35 struct snd_soc_pcm_runtime *rtd = substream->private_data;
36 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
37 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
40 /* set codec DAI configuration */
41 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
42 SND_SOC_DAIFMT_CBM_CFM);
46 /* set cpu DAI configuration */
47 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
48 SND_SOC_DAIFMT_IB_NF);
52 /* set the codec system clock */
53 ret = snd_soc_dai_set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
61 static struct snd_soc_ops evm_ops = {
62 .hw_params = evm_hw_params,
65 /* davinci-evm machine dapm widgets */
66 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
67 SND_SOC_DAPM_HP("Headphone Jack", NULL),
68 SND_SOC_DAPM_LINE("Line Out", NULL),
69 SND_SOC_DAPM_MIC("Mic Jack", NULL),
70 SND_SOC_DAPM_LINE("Line In", NULL),
73 /* davinci-evm machine audio_mapnections to the codec pins */
74 static const struct snd_soc_dapm_route audio_map[] = {
75 /* Headphone connected to HPLOUT, HPROUT */
76 {"Headphone Jack", NULL, "HPLOUT"},
77 {"Headphone Jack", NULL, "HPROUT"},
79 /* Line Out connected to LLOUT, RLOUT */
80 {"Line Out", NULL, "LLOUT"},
81 {"Line Out", NULL, "RLOUT"},
83 /* Mic connected to (MIC3L | MIC3R) */
84 {"MIC3L", NULL, "Mic Bias 2V"},
85 {"MIC3R", NULL, "Mic Bias 2V"},
86 {"Mic Bias 2V", NULL, "Mic Jack"},
88 /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
89 {"LINE1L", NULL, "Line In"},
90 {"LINE2L", NULL, "Line In"},
91 {"LINE1R", NULL, "Line In"},
92 {"LINE2R", NULL, "Line In"},
95 /* Logic for a aic3x as connected on a davinci-evm */
96 static int evm_aic3x_init(struct snd_soc_codec *codec)
98 /* Add davinci-evm specific widgets */
99 snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
100 ARRAY_SIZE(aic3x_dapm_widgets));
102 /* Set up davinci-evm specific audio path audio_map */
103 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
106 snd_soc_dapm_disable_pin(codec, "MONO_LOUT");
107 snd_soc_dapm_disable_pin(codec, "HPLCOM");
108 snd_soc_dapm_disable_pin(codec, "HPRCOM");
110 /* always connected */
111 snd_soc_dapm_enable_pin(codec, "Headphone Jack");
112 snd_soc_dapm_enable_pin(codec, "Line Out");
113 snd_soc_dapm_enable_pin(codec, "Mic Jack");
114 snd_soc_dapm_enable_pin(codec, "Line In");
116 snd_soc_dapm_sync(codec);
121 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
122 static struct snd_soc_dai_link evm_dai = {
123 .name = "TLV320AIC3X",
124 .stream_name = "AIC3X",
125 .cpu_dai = &davinci_i2s_dai,
126 .codec_dai = &aic3x_dai,
127 .init = evm_aic3x_init,
131 /* davinci-evm audio machine driver */
132 static struct snd_soc_machine snd_soc_machine_evm = {
133 .name = "DaVinci EVM",
134 .dai_link = &evm_dai,
138 /* evm audio private data */
139 static struct aic3x_setup_data evm_aic3x_setup = {
143 /* evm audio subsystem */
144 static struct snd_soc_device evm_snd_devdata = {
145 .machine = &snd_soc_machine_evm,
146 .platform = &davinci_soc_platform,
147 .codec_dev = &soc_codec_dev_aic3x,
148 .codec_data = &evm_aic3x_setup,
151 static struct resource evm_snd_resources[] = {
153 .start = DAVINCI_MCBSP_BASE,
154 .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
155 .flags = IORESOURCE_MEM,
159 static struct evm_snd_platform_data evm_snd_data = {
160 .tx_dma_ch = DM644X_DMACH_MCBSP_TX,
161 .rx_dma_ch = DM644X_DMACH_MCBSP_RX,
164 static struct platform_device *evm_snd_device;
166 static int __init evm_init(void)
170 evm_snd_device = platform_device_alloc("soc-audio", 0);
174 platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
175 evm_snd_devdata.dev = &evm_snd_device->dev;
176 evm_snd_device->dev.platform_data = &evm_snd_data;
178 ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
179 ARRAY_SIZE(evm_snd_resources));
181 platform_device_put(evm_snd_device);
185 ret = platform_device_add(evm_snd_device);
187 platform_device_put(evm_snd_device);
192 static void __exit evm_exit(void)
194 platform_device_unregister(evm_snd_device);
197 module_init(evm_init);
198 module_exit(evm_exit);
200 MODULE_AUTHOR("Vladimir Barinov");
201 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
202 MODULE_LICENSE("GPL");