summaryrefslogtreecommitdiff
path: root/sound/soc/davinci/davinci-evm.c
blob: 58fd1cbedd88eb4dba2e64b05bf189801b1239c2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
/*
 * ASoC driver for TI DAVINCI EVM platform
 *
 * Author:      Vladimir Barinov, <vbarinov@embeddedalley.com>
 * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/dma.h>
#include <asm/mach-types.h>

#include <mach/asp.h>
#include <mach/edma.h>
#include <mach/mux.h>

#include "../codecs/tlv320aic3x.h"
#include "davinci-pcm.h"
#include "davinci-i2s.h"


#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
		SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF)
static int evm_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
	int ret = 0;
	unsigned sysclk;

	/* ASP1 on DM355 EVM is clocked by an external oscillator */
	if (machine_is_davinci_dm355_evm())
		sysclk = 27000000;

	/* ASP0 in DM6446 EVM is clocked by U55, as configured by
	 * board-dm644x-evm.c using GPIOs from U18.  There are six
	 * options; here we "know" we use a 48 KHz sample rate.
	 */
	else if (machine_is_davinci_evm())
		sysclk = 12288000;

	else
		return -EINVAL;

	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
	if (ret < 0)
		return ret;

	/* set cpu DAI configuration */
	ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
	if (ret < 0)
		return ret;

	/* set the codec system clock */
	ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
	if (ret < 0)
		return ret;

	return 0;
}

static struct snd_soc_ops evm_ops = {
	.hw_params = evm_hw_params,
};

/* davinci-evm machine dapm widgets */
static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_LINE("Line Out", NULL),
	SND_SOC_DAPM_MIC("Mic Jack", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),
};

/* davinci-evm machine audio_mapnections to the codec pins */
static const struct snd_soc_dapm_route audio_map[] = {
	/* Headphone connected to HPLOUT, HPROUT */
	{"Headphone Jack", NULL, "HPLOUT"},
	{"Headphone Jack", NULL, "HPROUT"},

	/* Line Out connected to LLOUT, RLOUT */
	{"Line Out", NULL, "LLOUT"},
	{"Line Out", NULL, "RLOUT"},

	/* Mic connected to (MIC3L | MIC3R) */
	{"MIC3L", NULL, "Mic Bias 2V"},
	{"MIC3R", NULL, "Mic Bias 2V"},
	{"Mic Bias 2V", NULL, "Mic Jack"},

	/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
	{"LINE1L", NULL, "Line In"},
	{"LINE2L", NULL, "Line In"},
	{"LINE1R", NULL, "Line In"},
	{"LINE2R", NULL, "Line In"},
};

/* Logic for a aic3x as connected on a davinci-evm */
static int evm_aic3x_init(struct snd_soc_codec *codec)
{
	/* Add davinci-evm specific widgets */
	snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
				  ARRAY_SIZE(aic3x_dapm_widgets));

	/* Set up davinci-evm specific audio path audio_map */
	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

	/* not connected */
	snd_soc_dapm_disable_pin(codec, "MONO_LOUT");
	snd_soc_dapm_disable_pin(codec, "HPLCOM");
	snd_soc_dapm_disable_pin(codec, "HPRCOM");

	/* always connected */
	snd_soc_dapm_enable_pin(codec, "Headphone Jack");
	snd_soc_dapm_enable_pin(codec, "Line Out");
	snd_soc_dapm_enable_pin(codec, "Mic Jack");
	snd_soc_dapm_enable_pin(codec, "Line In");

	snd_soc_dapm_sync(codec);

	return 0;
}

/* davinci-evm digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.cpu_dai = &davinci_i2s_dai,
	.codec_dai = &aic3x_dai,
	.init = evm_aic3x_init,
	.ops = &evm_ops,
};

/* davinci-evm audio machine driver */
static struct snd_soc_card snd_soc_card_evm = {
	.name = "DaVinci EVM",
	.platform = &davinci_soc_platform,
	.dai_link = &evm_dai,
	.num_links = 1,
};

/* evm audio private data */
static struct aic3x_setup_data evm_aic3x_setup = {
	.i2c_bus = 1,
	.i2c_address = 0x1b,
};

/* evm audio subsystem */
static struct snd_soc_device evm_snd_devdata = {
	.card = &snd_soc_card_evm,
	.codec_dev = &soc_codec_dev_aic3x,
	.codec_data = &evm_aic3x_setup,
};

/* DM6446 EVM uses ASP0; line-out is a pair of RCA jacks */
static struct resource evm_snd_resources[] = {
	{
		.start = DAVINCI_ASP0_BASE,
		.end = DAVINCI_ASP0_BASE + SZ_8K - 1,
		.flags = IORESOURCE_MEM,
	},
};

static struct evm_snd_platform_data evm_snd_data = {
	.tx_dma_ch	= DAVINCI_DMA_ASP0_TX,
	.rx_dma_ch	= DAVINCI_DMA_ASP0_RX,
};

/* DM335 EVM uses ASP1; line-out is a stereo mini-jack */
static struct resource dm335evm_snd_resources[] = {
	{
		.start = DAVINCI_ASP1_BASE,
		.end = DAVINCI_ASP1_BASE + SZ_8K - 1,
		.flags = IORESOURCE_MEM,
	},
};

static struct evm_snd_platform_data dm335evm_snd_data = {
	.tx_dma_ch	= DAVINCI_DMA_ASP1_TX,
	.rx_dma_ch	= DAVINCI_DMA_ASP1_RX,
};

static struct platform_device *evm_snd_device;

static int __init evm_init(void)
{
	struct resource *resources;
	unsigned num_resources;
	struct evm_snd_platform_data *data;
	int index;
	int ret;

	if (machine_is_davinci_evm()) {
		davinci_cfg_reg(DM644X_MCBSP);

		resources = evm_snd_resources;
		num_resources = ARRAY_SIZE(evm_snd_resources);
		data = &evm_snd_data;
		index = 0;
	} else if (machine_is_davinci_dm355_evm()) {
		/* we don't use ASP1 IRQs, or we'd need to mux them ... */
		davinci_cfg_reg(DM355_EVT8_ASP1_TX);
		davinci_cfg_reg(DM355_EVT9_ASP1_RX);

		resources = dm335evm_snd_resources;
		num_resources = ARRAY_SIZE(dm335evm_snd_resources);
		data = &dm335evm_snd_data;
		index = 1;
	} else
		return -EINVAL;

	evm_snd_device = platform_device_alloc("soc-audio", index);
	if (!evm_snd_device)
		return -ENOMEM;

	platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
	evm_snd_devdata.dev = &evm_snd_device->dev;
	platform_device_add_data(evm_snd_device, data, sizeof(*data));

	ret = platform_device_add_resources(evm_snd_device, resources,
			num_resources);
	if (ret) {
		platform_device_put(evm_snd_device);
		return ret;
	}

	ret = platform_device_add(evm_snd_device);
	if (ret)
		platform_device_put(evm_snd_device);

	return ret;
}

static void __exit evm_exit(void)
{
	platform_device_unregister(evm_snd_device);
}

module_init(evm_init);
module_exit(evm_exit);

MODULE_AUTHOR("Vladimir Barinov");
MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
MODULE_LICENSE("GPL");