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
 26#include <asm/mach-types.h>
 27#include <mach/hardware.h>
 28#include <mach/gpio.h>
 29#include <plat/mcbsp.h>
 30
 31#include "omap-mcbsp.h"
 32#include "omap-pcm.h"
 33
 34#include "../codecs/tlv320aic23.h"
 35
 36#define CODEC_CLOCK 	12000000
 37
 38static int am3517evm_hw_params(struct snd_pcm_substream *substream,
 39	struct snd_pcm_hw_params *params)
 40{
 41	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 42	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 43	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 44	int ret;
 45
 46	/* Set codec DAI configuration */
 47	ret = snd_soc_dai_set_fmt(codec_dai,
 48				  SND_SOC_DAIFMT_DSP_B |
 49				  SND_SOC_DAIFMT_NB_NF |
 50				  SND_SOC_DAIFMT_CBM_CFM);
 51	if (ret < 0) {
 52		printk(KERN_ERR "can't set codec DAI configuration\n");
 53		return ret;
 54	}
 55
 56	/* Set cpu DAI configuration */
 57	ret = snd_soc_dai_set_fmt(cpu_dai,
 58				  SND_SOC_DAIFMT_DSP_B |
 59				  SND_SOC_DAIFMT_NB_NF |
 60				  SND_SOC_DAIFMT_CBM_CFM);
 61	if (ret < 0) {
 62		printk(KERN_ERR "can't set cpu DAI configuration\n");
 63		return ret;
 64	}
 65
 66	/* Set the codec system clock for DAC and ADC */
 67	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 68			CODEC_CLOCK, SND_SOC_CLOCK_IN);
 69	if (ret < 0) {
 70		printk(KERN_ERR "can't set codec system clock\n");
 71		return ret;
 72	}
 73
 74	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_CLKR_SRC_CLKX, 0,
 75				SND_SOC_CLOCK_IN);
 76	if (ret < 0) {
 77		printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_CLKR_SRC_CLKX\n");
 78		return ret;
 79	}
 80
 81	snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_FSR_SRC_FSX, 0,
 82				SND_SOC_CLOCK_IN);
 83	if (ret < 0) {
 84		printk(KERN_ERR "can't set CPU system clock OMAP_MCBSP_FSR_SRC_FSX\n");
 85		return ret;
 86	}
 87
 88	return 0;
 89}
 90
 91static struct snd_soc_ops am3517evm_ops = {
 92	.hw_params = am3517evm_hw_params,
 93};
 94
 95/* am3517evm machine dapm widgets */
 96static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 97	SND_SOC_DAPM_HP("Line Out", NULL),
 98	SND_SOC_DAPM_LINE("Line In", NULL),
 99	SND_SOC_DAPM_MIC("Mic In", NULL),
100};
101
102static const struct snd_soc_dapm_route audio_map[] = {
103	/* Line Out connected to LLOUT, RLOUT */
104	{"Line Out", NULL, "LOUT"},
105	{"Line Out", NULL, "ROUT"},
106
107	{"LLINEIN", NULL, "Line In"},
108	{"RLINEIN", NULL, "Line In"},
109
110	{"MICIN", NULL, "Mic In"},
111};
112
113static int am3517evm_aic23_init(struct snd_soc_pcm_runtime *rtd)
114{
115	struct snd_soc_codec *codec = rtd->codec;
116	struct snd_soc_dapm_context *dapm = &codec->dapm;
117
118	/* Add am3517-evm specific widgets */
119	snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
120				  ARRAY_SIZE(tlv320aic23_dapm_widgets));
121
122	/* Set up davinci-evm specific audio path audio_map */
123	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
124
125	/* always connected */
126	snd_soc_dapm_enable_pin(dapm, "Line Out");
127	snd_soc_dapm_enable_pin(dapm, "Line In");
128	snd_soc_dapm_enable_pin(dapm, "Mic In");
129
130	snd_soc_dapm_sync(dapm);
131
132	return 0;
133}
134
135/* Digital audio interface glue - connects codec <--> CPU */
136static struct snd_soc_dai_link am3517evm_dai = {
137	.name = "TLV320AIC23",
138	.stream_name = "AIC23",
139	.cpu_dai_name ="omap-mcbsp-dai.0",
140	.codec_dai_name = "tlv320aic23-hifi",
141	.platform_name = "omap-pcm-audio",
142	.codec_name = "tlv320aic23-codec.2-001a",
143	.init = am3517evm_aic23_init,
144	.ops = &am3517evm_ops,
145};
146
147/* Audio machine driver */
148static struct snd_soc_card snd_soc_am3517evm = {
149	.name = "am3517evm",
150	.dai_link = &am3517evm_dai,
151	.num_links = 1,
152};
153
154static struct platform_device *am3517evm_snd_device;
155
156static int __init am3517evm_soc_init(void)
157{
158	int ret;
159
160	if (!machine_is_omap3517evm())
161		return -ENODEV;
162	pr_info("OMAP3517 / AM3517 EVM SoC init\n");
163
164	am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
165	if (!am3517evm_snd_device) {
166		printk(KERN_ERR "Platform device allocation failed\n");
167		return -ENOMEM;
168	}
169
170	platform_set_drvdata(am3517evm_snd_device, &snd_soc_am3517evm);
171
172	ret = platform_device_add(am3517evm_snd_device);
173	if (ret)
174		goto err1;
175
176	return 0;
177
178err1:
179	printk(KERN_ERR "Unable to add platform device\n");
180	platform_device_put(am3517evm_snd_device);
181
182	return ret;
183}
184
185static void __exit am3517evm_soc_exit(void)
186{
187	platform_device_unregister(am3517evm_snd_device);
188}
189
190module_init(am3517evm_soc_init);
191module_exit(am3517evm_soc_exit);
192
193MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
194MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
195MODULE_LICENSE("GPL v2");