am3517evm.c revision ce6120cca2589ede530200c7cfe11ac9f144333c 
1/*
2 * am3517evm.c  -- ALSA SoC support for OMAP3517 / AM3517 EVM
3 *
4 * Author: Anuj Aggarwal <anuj.aggarwal@ti.com>
5 *
6 * Based on sound/soc/omap/beagle.c by Steve Sakoman
7 *
8 * Copyright (C) 2009 Texas Instruments Incorporated
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation version 2.
13 *
14 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
15 * whether express or implied; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 */
19
20#include <linux/clk.h>
21#include <linux/platform_device.h>
22#include <sound/core.h>
23#include <sound/pcm.h>
24#include <sound/soc.h>
25#include <sound/soc-dapm.h>
26
27#include <asm/mach-types.h>
28#include <mach/hardware.h>
29#include <mach/gpio.h>
30#include <plat/mcbsp.h>
31
32#include "omap-mcbsp.h"
33#include "omap-pcm.h"
34
35#include "../codecs/tlv320aic23.h"
36
37#define CODEC_CLOCK 	12000000
38
39static int am3517evm_hw_params(struct snd_pcm_substream *substream,
40	struct snd_pcm_hw_params *params)
41{
42	struct snd_soc_pcm_runtime *rtd = substream->private_data;
43	struct snd_soc_dai *codec_dai = rtd->codec_dai;
44	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
45	int ret;
46
47	/* Set codec DAI configuration */
48	ret = snd_soc_dai_set_fmt(codec_dai,
49				  SND_SOC_DAIFMT_DSP_B |
50				  SND_SOC_DAIFMT_NB_NF |
51				  SND_SOC_DAIFMT_CBM_CFM);
52	if (ret < 0) {
53		printk(KERN_ERR "can't set codec DAI configuration\n");
54		return ret;
55	}
56
57	/* Set cpu DAI configuration */
58	ret = snd_soc_dai_set_fmt(cpu_dai,
59				  SND_SOC_DAIFMT_DSP_B |
60				  SND_SOC_DAIFMT_NB_NF |
61				  SND_SOC_DAIFMT_CBM_CFM);
62	if (ret < 0) {
63		printk(KERN_ERR "can't set cpu DAI configuration\n");
64		return ret;
65	}
66
67	/* Set the codec system clock for DAC and ADC */
68	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
69			CODEC_CLOCK, SND_SOC_CLOCK_IN);
70	if (ret < 0) {
71		printk(KERN_ERR "can't set codec system clock\n");
72		return ret;
73	}
74
75	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_CLKR_SRC_CLKX, 0,
76				SND_SOC_CLOCK_IN);
77	if (ret < 0) {
78		printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_CLKR_SRC_CLKX\n");
79		return ret;
80	}
81
82	snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_FSR_SRC_FSX, 0,
83				SND_SOC_CLOCK_IN);
84	if (ret < 0) {
85		printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_FSR_SRC_FSX\n");
86		return ret;
87	}
88
89	return 0;
90}
91
92static struct snd_soc_ops am3517evm_ops = {
93	.hw_params = am3517evm_hw_params,
94};
95
96/* am3517evm machine dapm widgets */
97static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
98	SND_SOC_DAPM_HP("Line Out", NULL),
99	SND_SOC_DAPM_LINE("Line In", NULL),
100	SND_SOC_DAPM_MIC("Mic In", NULL),
101};
102
103static const struct snd_soc_dapm_route audio_map[] = {
104	/* Line Out connected to LLOUT, RLOUT */
105	{"Line Out", NULL, "LOUT"},
106	{"Line Out", NULL, "ROUT"},
107
108	{"LLINEIN", NULL, "Line In"},
109	{"RLINEIN", NULL, "Line In"},
110
111	{"MICIN", NULL, "Mic In"},
112};
113
114static int am3517evm_aic23_init(struct snd_soc_pcm_runtime *rtd)
115{
116	struct snd_soc_codec *codec = rtd->codec;
117	struct snd_soc_dapm_context *dapm = &codec->dapm;
118
119	/* Add am3517-evm specific widgets */
120	snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
121				  ARRAY_SIZE(tlv320aic23_dapm_widgets));
122
123	/* Set up davinci-evm specific audio path audio_map */
124	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
125
126	/* always connected */
127	snd_soc_dapm_enable_pin(dapm, "Line Out");
128	snd_soc_dapm_enable_pin(dapm, "Line In");
129	snd_soc_dapm_enable_pin(dapm, "Mic In");
130
131	snd_soc_dapm_sync(dapm);
132
133	return 0;
134}
135
136/* Digital audio interface glue - connects codec <--> CPU */
137static struct snd_soc_dai_link am3517evm_dai = {
138	.name = "TLV320AIC23",
139	.stream_name = "AIC23",
140	.cpu_dai_name ="omap-mcbsp-dai.0",
141	.codec_dai_name = "tlv320aic23-hifi",
142	.platform_name = "omap-pcm-audio",
143	.codec_name = "tlv320aic23-codec",
144	.init = am3517evm_aic23_init,
145	.ops = &am3517evm_ops,
146};
147
148/* Audio machine driver */
149static struct snd_soc_card snd_soc_am3517evm = {
150	.name = "am3517evm",
151	.dai_link = &am3517evm_dai,
152	.num_links = 1,
153};
154
155static struct platform_device *am3517evm_snd_device;
156
157static int __init am3517evm_soc_init(void)
158{
159	int ret;
160
161	if (!machine_is_omap3517evm())
162		return -ENODEV;
163	pr_info("OMAP3517 / AM3517 EVM SoC init\n");
164
165	am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
166	if (!am3517evm_snd_device) {
167		printk(KERN_ERR "Platform device allocation failed\n");
168		return -ENOMEM;
169	}
170
171	platform_set_drvdata(am3517evm_snd_device, &snd_soc_am3517evm);
172
173	ret = platform_device_add(am3517evm_snd_device);
174	if (ret)
175		goto err1;
176
177	return 0;
178
179err1:
180	printk(KERN_ERR "Unable to add platform device\n");
181	platform_device_put(am3517evm_snd_device);
182
183	return ret;
184}
185
186static void __exit am3517evm_soc_exit(void)
187{
188	platform_device_unregister(am3517evm_snd_device);
189}
190
191module_init(am3517evm_soc_init);
192module_exit(am3517evm_soc_exit);
193
194MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
195MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
196MODULE_LICENSE("GPL v2");
197