2 * ASoC driver for TI DAVINCI EVM platform
4 * Author: Vladimir Barinov, <vbarinov@embeddedalley.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>
23 #include <mach/hardware.h>
25 #include "../codecs/tlv320aic3x.h"
26 #include "davinci-pcm.h"
27 #include "davinci-i2s.h"
29 #define EVM_CODEC_CLOCK 22579200
31 static int evm_hw_params(struct snd_pcm_substream
*substream
,
32 struct snd_pcm_hw_params
*params
)
34 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
35 struct snd_soc_dai
*codec_dai
= rtd
->dai
->codec_dai
;
36 struct snd_soc_dai
*cpu_dai
= rtd
->dai
->cpu_dai
;
39 /* set codec DAI configuration */
40 ret
= snd_soc_dai_set_fmt(codec_dai
, SND_SOC_DAIFMT_I2S
|
41 SND_SOC_DAIFMT_CBM_CFM
);
45 /* set cpu DAI configuration */
46 ret
= snd_soc_dai_set_fmt(cpu_dai
, SND_SOC_DAIFMT_CBM_CFM
|
47 SND_SOC_DAIFMT_IB_NF
);
51 /* set the codec system clock */
52 ret
= snd_soc_dai_set_sysclk(codec_dai
, 0, EVM_CODEC_CLOCK
,
60 static struct snd_soc_ops evm_ops
= {
61 .hw_params
= evm_hw_params
,
64 /* davinci-evm machine dapm widgets */
65 static const struct snd_soc_dapm_widget aic3x_dapm_widgets
[] = {
66 SND_SOC_DAPM_HP("Headphone Jack", NULL
),
67 SND_SOC_DAPM_LINE("Line Out", NULL
),
68 SND_SOC_DAPM_MIC("Mic Jack", NULL
),
69 SND_SOC_DAPM_LINE("Line In", NULL
),
72 /* davinci-evm machine audio_mapnections to the codec pins */
73 static const struct snd_soc_dapm_route audio_map
[] = {
74 /* Headphone connected to HPLOUT, HPROUT */
75 {"Headphone Jack", NULL
, "HPLOUT"},
76 {"Headphone Jack", NULL
, "HPROUT"},
78 /* Line Out connected to LLOUT, RLOUT */
79 {"Line Out", NULL
, "LLOUT"},
80 {"Line Out", NULL
, "RLOUT"},
82 /* Mic connected to (MIC3L | MIC3R) */
83 {"MIC3L", NULL
, "Mic Bias 2V"},
84 {"MIC3R", NULL
, "Mic Bias 2V"},
85 {"Mic Bias 2V", NULL
, "Mic Jack"},
87 /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
88 {"LINE1L", NULL
, "Line In"},
89 {"LINE2L", NULL
, "Line In"},
90 {"LINE1R", NULL
, "Line In"},
91 {"LINE2R", NULL
, "Line In"},
94 /* Logic for a aic3x as connected on a davinci-evm */
95 static int evm_aic3x_init(struct snd_soc_codec
*codec
)
97 /* Add davinci-evm specific widgets */
98 snd_soc_dapm_new_controls(codec
, aic3x_dapm_widgets
,
99 ARRAY_SIZE(aic3x_dapm_widgets
));
101 /* Set up davinci-evm specific audio path audio_map */
102 snd_soc_dapm_add_routes(codec
, audio_map
, ARRAY_SIZE(audio_map
));
105 snd_soc_dapm_disable_pin(codec
, "MONO_LOUT");
106 snd_soc_dapm_disable_pin(codec
, "HPLCOM");
107 snd_soc_dapm_disable_pin(codec
, "HPRCOM");
109 /* always connected */
110 snd_soc_dapm_enable_pin(codec
, "Headphone Jack");
111 snd_soc_dapm_enable_pin(codec
, "Line Out");
112 snd_soc_dapm_enable_pin(codec
, "Mic Jack");
113 snd_soc_dapm_enable_pin(codec
, "Line In");
115 snd_soc_dapm_sync(codec
);
120 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
121 static struct snd_soc_dai_link evm_dai
= {
122 .name
= "TLV320AIC3X",
123 .stream_name
= "AIC3X",
124 .cpu_dai
= &davinci_i2s_dai
,
125 .codec_dai
= &aic3x_dai
,
126 .init
= evm_aic3x_init
,
130 /* davinci-evm audio machine driver */
131 static struct snd_soc_card snd_soc_card_evm
= {
132 .name
= "DaVinci EVM",
133 .dai_link
= &evm_dai
,
137 /* evm audio private data */
138 static struct aic3x_setup_data evm_aic3x_setup
= {
143 /* evm audio subsystem */
144 static struct snd_soc_device evm_snd_devdata
= {
145 .card
= &snd_soc_card_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");