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 <linux/module.h>
 23#include <sound/core.h>
 24#include <sound/pcm.h>
 25#include <sound/soc.h>
 26
 27#include <asm/mach-types.h>
 28#include <linux/platform_data/asoc-ti-mcbsp.h>
 29
 30#include "omap-mcbsp.h"
 31
 32#include "../codecs/tlv320aic23.h"
 33
 34#define CODEC_CLOCK 	12000000
 35
 36static int am3517evm_hw_params(struct snd_pcm_substream *substream,
 37	struct snd_pcm_hw_params *params)
 38{
 39	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 40	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 41	int ret;
 42
 43	/* Set the codec system clock for DAC and ADC */
 44	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 45			CODEC_CLOCK, SND_SOC_CLOCK_IN);
 46	if (ret < 0)
 47		printk(KERN_ERR "can't set codec system clock\n");
 48
 49	return ret;
 50}
 51
 52static const struct snd_soc_ops am3517evm_ops = {
 53	.hw_params = am3517evm_hw_params,
 54};
 55
 56/* am3517evm machine dapm widgets */
 57static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
 58	SND_SOC_DAPM_HP("Line Out", NULL),
 59	SND_SOC_DAPM_LINE("Line In", NULL),
 60	SND_SOC_DAPM_MIC("Mic In", NULL),
 61};
 62
 63static const struct snd_soc_dapm_route audio_map[] = {
 64	/* Line Out connected to LLOUT, RLOUT */
 65	{"Line Out", NULL, "LOUT"},
 66	{"Line Out", NULL, "ROUT"},
 67
 68	{"LLINEIN", NULL, "Line In"},
 69	{"RLINEIN", NULL, "Line In"},
 70
 71	{"MICIN", NULL, "Mic In"},
 72};
 73
 74/* Digital audio interface glue - connects codec <--> CPU */
 75static struct snd_soc_dai_link am3517evm_dai = {
 76	.name = "TLV320AIC23",
 77	.stream_name = "AIC23",
 78	.cpu_dai_name = "omap-mcbsp.1",
 79	.codec_dai_name = "tlv320aic23-hifi",
 80	.platform_name = "omap-mcbsp.1",
 81	.codec_name = "tlv320aic23-codec.2-001a",
 82	.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
 83		   SND_SOC_DAIFMT_CBM_CFM,
 84	.ops = &am3517evm_ops,
 85};
 86
 87/* Audio machine driver */
 88static struct snd_soc_card snd_soc_am3517evm = {
 89	.name = "am3517evm",
 90	.owner = THIS_MODULE,
 91	.dai_link = &am3517evm_dai,
 92	.num_links = 1,
 93
 94	.dapm_widgets = tlv320aic23_dapm_widgets,
 95	.num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
 96	.dapm_routes = audio_map,
 97	.num_dapm_routes = ARRAY_SIZE(audio_map),
 98};
 99
100static struct platform_device *am3517evm_snd_device;
101
102static int __init am3517evm_soc_init(void)
103{
104	int ret;
105
106	if (!machine_is_omap3517evm())
107		return -ENODEV;
108	pr_info("OMAP3517 / AM3517 EVM SoC init\n");
109
110	am3517evm_snd_device = platform_device_alloc("soc-audio", -1);
111	if (!am3517evm_snd_device) {
112		printk(KERN_ERR "Platform device allocation failed\n");
113		return -ENOMEM;
114	}
115
116	platform_set_drvdata(am3517evm_snd_device, &snd_soc_am3517evm);
117
118	ret = platform_device_add(am3517evm_snd_device);
119	if (ret)
120		goto err1;
121
122	return 0;
123
124err1:
125	printk(KERN_ERR "Unable to add platform device\n");
126	platform_device_put(am3517evm_snd_device);
127
128	return ret;
129}
130
131static void __exit am3517evm_soc_exit(void)
132{
133	platform_device_unregister(am3517evm_snd_device);
134}
135
136module_init(am3517evm_soc_init);
137module_exit(am3517evm_soc_exit);
138
139MODULE_AUTHOR("Anuj Aggarwal <anuj.aggarwal@ti.com>");
140MODULE_DESCRIPTION("ALSA SoC OMAP3517 / AM3517 EVM");
141MODULE_LICENSE("GPL v2");