[deliverable/linux.git] / sound / soc / tegra / harmony.c

/*
 * harmony.c - Harmony machine ASoC driver
 *
 * Author: Stephen Warren <swarren@nvidia.com>
 * Copyright (C) 2010 - NVIDIA, Inc.
 *
 * Based on code copyright/by:
 *
 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
 *
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory
 *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <asm/mach-types.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "tegra_das.h"
#include "tegra_i2s.h"
#include "tegra_pcm.h"
#include "tegra_asoc_utils.h"

#define PREFIX "ASoC Harmony: "

static struct platform_device *harmony_snd_device;

static int harmony_asoc_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->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	int srate, mclk, mclk_change;
	int err;

	srate = params_rate(params);
	switch (srate) {
	case 64000:
	case 88200:
	case 96000:
		mclk = 128 * srate;
		break;
	default:
		mclk = 256 * srate;
		break;
	}
	/* FIXME: Codec only requires >= 3MHz if OSR==0 */
	while (mclk < 6000000)
		mclk *= 2;

	err = tegra_asoc_utils_set_rate(srate, mclk, &mclk_change);
	if (err < 0) {
		pr_err(PREFIX "Can't configure clocks\n");
		return err;
	}

	err = snd_soc_dai_set_fmt(codec_dai,
					SND_SOC_DAIFMT_I2S |
					SND_SOC_DAIFMT_NB_NF |
					SND_SOC_DAIFMT_CBS_CFS);
	if (err < 0) {
		pr_err(PREFIX "codec_dai fmt not set\n");
		return err;
	}

	err = snd_soc_dai_set_fmt(cpu_dai,
					SND_SOC_DAIFMT_I2S |
					SND_SOC_DAIFMT_NB_NF |
					SND_SOC_DAIFMT_CBS_CFS);
	if (err < 0) {
		pr_err(PREFIX "cpu_dai fmt not set\n");
		return err;
	}

	if (mclk_change) {
	    err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN);
	    if (err < 0) {
		    pr_err(PREFIX "codec_dai clock not set\n");
		    return err;
	    }
	}

	return 0;
}

static struct snd_soc_ops harmony_asoc_ops = {
	.hw_params = harmony_asoc_hw_params,
};

static struct snd_soc_dai_link harmony_wm8903_dai = {
	.name = "WM8903",
	.stream_name = "WM8903 PCM",
	.codec_name = "wm8903-codec.0-001a",
	.platform_name = "tegra-pcm-audio",
	.cpu_dai_name = "tegra-i2s.0",
	.codec_dai_name = "wm8903-hifi",
	.ops = &harmony_asoc_ops,
};

static struct snd_soc_card snd_soc_harmony = {
	.name = "tegra-harmony",
	.dai_link = &harmony_wm8903_dai,
	.num_links = 1,
};

static int __init harmony_soc_modinit(void)
{
	int ret;

	if (!machine_is_harmony()) {
		pr_err(PREFIX "Not running on Tegra Harmony!\n");
		return -ENODEV;
	}

	ret = tegra_asoc_utils_init();
	if (ret) {
		return ret;
	}

	/*
	 * Create and register platform device
	 */
	harmony_snd_device = platform_device_alloc("soc-audio", -1);
	if (harmony_snd_device == NULL) {
		pr_err(PREFIX "platform_device_alloc failed\n");
		ret = -ENOMEM;
		goto err_clock_utils;
	}

	platform_set_drvdata(harmony_snd_device, &snd_soc_harmony);

	ret = platform_device_add(harmony_snd_device);
	if (ret) {
		pr_err(PREFIX "platform_device_add failed (%d)\n",
			ret);
		goto err_device_put;
	}

	return 0;

err_device_put:
	platform_device_put(harmony_snd_device);
err_clock_utils:
	tegra_asoc_utils_fini();
	return ret;
}
module_init(harmony_soc_modinit);

static void __exit harmony_soc_modexit(void)
{
	platform_device_unregister(harmony_snd_device);

	tegra_asoc_utils_fini();
}
module_exit(harmony_soc_modexit);

MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Harmony machine ASoC driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
a8bf1ba1 SW	1	/*
	2	* harmony.c - Harmony machine ASoC driver
	3	*
	4	* Author: Stephen Warren <swarren@nvidia.com>
	5	* Copyright (C) 2010 - NVIDIA, Inc.
	6	*
	7	* Based on code copyright/by:
	8	*
	9	* (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
	10	*
	11	* Copyright 2007 Wolfson Microelectronics PLC.
	12	* Author: Graeme Gregory
	13	* graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License
	17	* version 2 as published by the Free Software Foundation.
	18	*
	19	* This program is distributed in the hope that it will be useful, but
	20	* WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	22	* General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	27	* 02110-1301 USA
	28	*
	29	*/
	30
	31	#include <asm/mach-types.h>
	32	#include <linux/module.h>
	33	#include <sound/core.h>
	34	#include <sound/pcm.h>
	35	#include <sound/pcm_params.h>
	36	#include <sound/soc.h>
	37
	38	#include "tegra_das.h"
	39	#include "tegra_i2s.h"
	40	#include "tegra_pcm.h"
	41	#include "tegra_asoc_utils.h"
	42
	43	#define PREFIX "ASoC Harmony: "
	44
	45	static struct platform_device *harmony_snd_device;
	46
	47	static int harmony_asoc_hw_params(struct snd_pcm_substream *substream,
	48	struct snd_pcm_hw_params *params)
	49	{
	50	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	51	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	52	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	53	int srate, mclk, mclk_change;
	54	int err;
	55
	56	srate = params_rate(params);
	57	switch (srate) {
	58	case 64000:
	59	case 88200:
	60	case 96000:
	61	mclk = 128 * srate;
	62	break;
	63	default:
	64	mclk = 256 * srate;
65	break;
66	}
67	/* FIXME: Codec only requires >= 3MHz if OSR==0 */
68	while (mclk < 6000000)
69	mclk *= 2;
70
71	err = tegra_asoc_utils_set_rate(srate, mclk, &mclk_change);
72	if (err < 0) {
73	pr_err(PREFIX "Can't configure clocks\n");
74	return err;
75	}
76
77	err = snd_soc_dai_set_fmt(codec_dai,
78	SND_SOC_DAIFMT_I2S \|
79	SND_SOC_DAIFMT_NB_NF \|
80	SND_SOC_DAIFMT_CBS_CFS);
81	if (err < 0) {
82	pr_err(PREFIX "codec_dai fmt not set\n");
83	return err;
84	}
85
86	err = snd_soc_dai_set_fmt(cpu_dai,
87	SND_SOC_DAIFMT_I2S \|
88	SND_SOC_DAIFMT_NB_NF \|
89	SND_SOC_DAIFMT_CBS_CFS);
90	if (err < 0) {
91	pr_err(PREFIX "cpu_dai fmt not set\n");
92	return err;
93	}
94
95	if (mclk_change) {
96	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN);
97	if (err < 0) {
98	pr_err(PREFIX "codec_dai clock not set\n");
99	return err;
100	}
101	}
102
103	return 0;
104	}
105
106	static struct snd_soc_ops harmony_asoc_ops = {
107	.hw_params = harmony_asoc_hw_params,
108	};
109
110	static struct snd_soc_dai_link harmony_wm8903_dai = {
111	.name = "WM8903",
112	.stream_name = "WM8903 PCM",
113	.codec_name = "wm8903-codec.0-001a",
114	.platform_name = "tegra-pcm-audio",
115	.cpu_dai_name = "tegra-i2s.0",
116	.codec_dai_name = "wm8903-hifi",
117	.ops = &harmony_asoc_ops,
118	};
119
120	static struct snd_soc_card snd_soc_harmony = {
121	.name = "tegra-harmony",
122	.dai_link = &harmony_wm8903_dai,
123	.num_links = 1,
124	};
125
126	static int __init harmony_soc_modinit(void)
127	{
128	int ret;
129
130	if (!machine_is_harmony()) {
131	pr_err(PREFIX "Not running on Tegra Harmony!\n");
132	return -ENODEV;
133	}
134
135	ret = tegra_asoc_utils_init();
136	if (ret) {
137	return ret;
138	}
139
140	/*
141	* Create and register platform device
142	*/
143	harmony_snd_device = platform_device_alloc("soc-audio", -1);
144	if (harmony_snd_device == NULL) {
145	pr_err(PREFIX "platform_device_alloc failed\n");
146	ret = -ENOMEM;
147	goto err_clock_utils;
148	}
149
150	platform_set_drvdata(harmony_snd_device, &snd_soc_harmony);
151
152	ret = platform_device_add(harmony_snd_device);
153	if (ret) {
154	pr_err(PREFIX "platform_device_add failed (%d)\n",
155	ret);
156	goto err_device_put;
157	}
158
159	return 0;
160
161	err_device_put:
162	platform_device_put(harmony_snd_device);
163	err_clock_utils:
164	tegra_asoc_utils_fini();
165	return ret;
166	}
167	module_init(harmony_soc_modinit);
168
169	static void __exit harmony_soc_modexit(void)
170	{
171	platform_device_unregister(harmony_snd_device);
172
173	tegra_asoc_utils_fini();
174	}
175	module_exit(harmony_soc_modexit);
176
177	MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
178	MODULE_DESCRIPTION("Harmony machine ASoC driver");
179	MODULE_LICENSE("GPL");