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"
30 #define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
31 SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF)
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
;
41 /* ASP1 on DM355 EVM is clocked by an external oscillator */
42 if (machine_is_davinci_dm355_evm())
45 /* ASP0 in DM6446 EVM is clocked by U55, as configured by
46 * board-dm644x-evm.c using GPIOs from U18. There are six
47 * options; here we "know" we use a 48 KHz sample rate.
49 else if (machine_is_davinci_evm())
55 /* set codec DAI configuration */
56 ret
= snd_soc_dai_set_fmt(codec_dai
, AUDIO_FORMAT
);
60 /* set cpu DAI configuration */
61 ret
= snd_soc_dai_set_fmt(cpu_dai
, AUDIO_FORMAT
);
65 /* set the codec system clock */
66 ret
= snd_soc_dai_set_sysclk(codec_dai
, 0, sysclk
, SND_SOC_CLOCK_OUT
);
73 static struct snd_soc_ops evm_ops
= {
74 .hw_params
= evm_hw_params
,
77 /* davinci-evm machine dapm widgets */
78 static const struct snd_soc_dapm_widget aic3x_dapm_widgets
[] = {
79 SND_SOC_DAPM_HP("Headphone Jack", NULL
),
80 SND_SOC_DAPM_LINE("Line Out", NULL
),
81 SND_SOC_DAPM_MIC("Mic Jack", NULL
),
82 SND_SOC_DAPM_LINE("Line In", NULL
),
85 /* davinci-evm machine audio_mapnections to the codec pins */
86 static const struct snd_soc_dapm_route audio_map
[] = {
87 /* Headphone connected to HPLOUT, HPROUT */
88 {"Headphone Jack", NULL
, "HPLOUT"},
89 {"Headphone Jack", NULL
, "HPROUT"},
91 /* Line Out connected to LLOUT, RLOUT */
92 {"Line Out", NULL
, "LLOUT"},
93 {"Line Out", NULL
, "RLOUT"},
95 /* Mic connected to (MIC3L | MIC3R) */
96 {"MIC3L", NULL
, "Mic Bias 2V"},
97 {"MIC3R", NULL
, "Mic Bias 2V"},
98 {"Mic Bias 2V", NULL
, "Mic Jack"},
100 /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
101 {"LINE1L", NULL
, "Line In"},
102 {"LINE2L", NULL
, "Line In"},
103 {"LINE1R", NULL
, "Line In"},
104 {"LINE2R", NULL
, "Line In"},
107 /* Logic for a aic3x as connected on a davinci-evm */
108 static int evm_aic3x_init(struct snd_soc_codec
*codec
)
110 /* Add davinci-evm specific widgets */
111 snd_soc_dapm_new_controls(codec
, aic3x_dapm_widgets
,
112 ARRAY_SIZE(aic3x_dapm_widgets
));
114 /* Set up davinci-evm specific audio path audio_map */
115 snd_soc_dapm_add_routes(codec
, audio_map
, ARRAY_SIZE(audio_map
));
118 snd_soc_dapm_disable_pin(codec
, "MONO_LOUT");
119 snd_soc_dapm_disable_pin(codec
, "HPLCOM");
120 snd_soc_dapm_disable_pin(codec
, "HPRCOM");
122 /* always connected */
123 snd_soc_dapm_enable_pin(codec
, "Headphone Jack");
124 snd_soc_dapm_enable_pin(codec
, "Line Out");
125 snd_soc_dapm_enable_pin(codec
, "Mic Jack");
126 snd_soc_dapm_enable_pin(codec
, "Line In");
128 snd_soc_dapm_sync(codec
);
133 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
134 static struct snd_soc_dai_link evm_dai
= {
135 .name
= "TLV320AIC3X",
136 .stream_name
= "AIC3X",
137 .cpu_dai
= &davinci_i2s_dai
,
138 .codec_dai
= &aic3x_dai
,
139 .init
= evm_aic3x_init
,
143 /* davinci-evm audio machine driver */
144 static struct snd_soc_card snd_soc_card_evm
= {
145 .name
= "DaVinci EVM",
146 .platform
= &davinci_soc_platform
,
147 .dai_link
= &evm_dai
,
151 /* evm audio private data */
152 static struct aic3x_setup_data evm_aic3x_setup
= {
157 /* evm audio subsystem */
158 static struct snd_soc_device evm_snd_devdata
= {
159 .card
= &snd_soc_card_evm
,
160 .codec_dev
= &soc_codec_dev_aic3x
,
161 .codec_data
= &evm_aic3x_setup
,
164 static struct resource evm_snd_resources
[] = {
166 .start
= DAVINCI_MCBSP_BASE
,
167 .end
= DAVINCI_MCBSP_BASE
+ SZ_8K
- 1,
168 .flags
= IORESOURCE_MEM
,
172 static struct evm_snd_platform_data evm_snd_data
= {
173 .tx_dma_ch
= DM644X_DMACH_MCBSP_TX
,
174 .rx_dma_ch
= DM644X_DMACH_MCBSP_RX
,
177 static struct platform_device
*evm_snd_device
;
179 static int __init
evm_init(void)
183 evm_snd_device
= platform_device_alloc("soc-audio", 0);
187 platform_set_drvdata(evm_snd_device
, &evm_snd_devdata
);
188 evm_snd_devdata
.dev
= &evm_snd_device
->dev
;
189 platform_device_add_data(evm_snd_device
, &evm_snd_data
,
190 sizeof(evm_snd_data
));
192 ret
= platform_device_add_resources(evm_snd_device
, evm_snd_resources
,
193 ARRAY_SIZE(evm_snd_resources
));
195 platform_device_put(evm_snd_device
);
199 ret
= platform_device_add(evm_snd_device
);
201 platform_device_put(evm_snd_device
);
206 static void __exit
evm_exit(void)
208 platform_device_unregister(evm_snd_device
);
211 module_init(evm_init
);
212 module_exit(evm_exit
);
214 MODULE_AUTHOR("Vladimir Barinov");
215 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
216 MODULE_LICENSE("GPL");