[mirror_ubuntu-zesty-kernel.git] / sound / soc / codecs / pcm3008.c

/*
 * ALSA Soc PCM3008 codec support
 *
 * Author:	Hugo Villeneuve
 * Copyright (C) 2008 Lyrtech inc
 *
 * Based on AC97 Soc codec, original copyright follow:
 * Copyright 2005 Wolfson Microelectronics PLC.
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 * Generic PCM3008 support.
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include "pcm3008.h"

#define PCM3008_VERSION "0.2"

#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |	\
		       SNDRV_PCM_RATE_48000)

struct snd_soc_dai pcm3008_dai = {
	.name = "PCM3008 HiFi",
	.type = SND_SOC_DAI_I2S,
	.playback = {
		.stream_name = "PCM3008 Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = PCM3008_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "PCM3008 Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = PCM3008_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
};
EXPORT_SYMBOL_GPL(pcm3008_dai);

static void pcm3008_gpio_free(struct pcm3008_setup_data *setup)
{
	gpio_free(setup->dem0_pin);
	gpio_free(setup->dem1_pin);
	gpio_free(setup->pdad_pin);
	gpio_free(setup->pdda_pin);
}

static int pcm3008_soc_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	struct pcm3008_setup_data *setup = socdev->codec_data;
	int ret = 0;

	printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);

	socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (!socdev->codec)
		return -ENOMEM;

	codec = socdev->codec;
	mutex_init(&codec->mutex);

	codec->name = "PCM3008";
	codec->owner = THIS_MODULE;
	codec->dai = &pcm3008_dai;
	codec->num_dai = 1;
	codec->write = NULL;
	codec->read = NULL;
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	/* Register PCMs. */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "pcm3008: failed to create pcms\n");
		goto pcm_err;
	}

	/* Register Card. */
	ret = snd_soc_register_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "pcm3008: failed to register card\n");
		goto card_err;
	}

	/* DEM1  DEM0  DE-EMPHASIS_MODE
	 * Low   Low   De-emphasis 44.1 kHz ON
	 * Low   High  De-emphasis OFF
	 * High  Low   De-emphasis 48 kHz ON
	 * High  High  De-emphasis 32 kHz ON
	 */

	/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
	ret = gpio_request(setup->dem0_pin, "codec_dem0");
	if (ret == 0)
		ret = gpio_direction_output(setup->dem0_pin, 1);
	if (ret != 0)
		goto gpio_err;

	/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
	ret = gpio_request(setup->dem1_pin, "codec_dem1");
	if (ret == 0)
		ret = gpio_direction_output(setup->dem1_pin, 0);
	if (ret != 0)
		goto gpio_err;

	/* Configure PDAD GPIO. */
	ret = gpio_request(setup->pdad_pin, "codec_pdad");
	if (ret == 0)
		ret = gpio_direction_output(setup->pdad_pin, 1);
	if (ret != 0)
		goto gpio_err;

	/* Configure PDDA GPIO. */
	ret = gpio_request(setup->pdda_pin, "codec_pdda");
	if (ret == 0)
		ret = gpio_direction_output(setup->pdda_pin, 1);
	if (ret != 0)
		goto gpio_err;

	return ret;

gpio_err:
	pcm3008_gpio_free(setup);
card_err:
	snd_soc_free_pcms(socdev);
pcm_err:
	kfree(socdev->codec);

	return ret;
}

static int pcm3008_soc_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->codec;
	struct pcm3008_setup_data *setup = socdev->codec_data;

	if (!codec)
		return 0;

	pcm3008_gpio_free(setup);
	snd_soc_free_pcms(socdev);
	kfree(socdev->codec);

	return 0;
}

#ifdef CONFIG_PM
static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct pcm3008_setup_data *setup = socdev->codec_data;

	gpio_set_value(setup->pdad_pin, 0);
	gpio_set_value(setup->pdda_pin, 0);

	return 0;
}

static int pcm3008_soc_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct pcm3008_setup_data *setup = socdev->codec_data;

	gpio_set_value(setup->pdad_pin, 1);
	gpio_set_value(setup->pdda_pin, 1);

	return 0;
}
#else
#define pcm3008_soc_suspend NULL
#define pcm3008_soc_resume NULL
#endif

struct snd_soc_codec_device soc_codec_dev_pcm3008 = {
	.probe = 	pcm3008_soc_probe,
	.remove = 	pcm3008_soc_remove,
	.suspend =	pcm3008_soc_suspend,
	.resume =	pcm3008_soc_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008);

MODULE_DESCRIPTION("Soc PCM3008 driver");
MODULE_AUTHOR("Hugo Villeneuve");
MODULE_LICENSE("GPL");
Commit	Line	Data
1c0090c2 HV	1	/*
	2	* ALSA Soc PCM3008 codec support
	3	*
	4	* Author: Hugo Villeneuve
	5	* Copyright (C) 2008 Lyrtech inc
	6	*
	7	* Based on AC97 Soc codec, original copyright follow:
	8	* Copyright 2005 Wolfson Microelectronics PLC.
	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; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*
	15	* Generic PCM3008 support.
	16	*/
	17
	18	#include <linux/init.h>
	19	#include <linux/kernel.h>
	20	#include <linux/device.h>
	21	#include <linux/gpio.h>
	22	#include <sound/core.h>
	23	#include <sound/pcm.h>
	24	#include <sound/initval.h>
	25	#include <sound/soc.h>
	26
	27	#include "pcm3008.h"
	28
	29	#define PCM3008_VERSION "0.2"
	30
	31	#define PCM3008_RATES (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	32	SNDRV_PCM_RATE_48000)
	33
	34	struct snd_soc_dai pcm3008_dai = {
	35	.name = "PCM3008 HiFi",
	36	.type = SND_SOC_DAI_I2S,
	37	.playback = {
	38	.stream_name = "PCM3008 Playback",
	39	.channels_min = 1,
	40	.channels_max = 2,
	41	.rates = PCM3008_RATES,
	42	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	43	},
	44	.capture = {
	45	.stream_name = "PCM3008 Capture",
	46	.channels_min = 1,
	47	.channels_max = 2,
	48	.rates = PCM3008_RATES,
	49	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	50	},
	51	};
	52	EXPORT_SYMBOL_GPL(pcm3008_dai);
	53
	54	static void pcm3008_gpio_free(struct pcm3008_setup_data *setup)
	55	{
	56	gpio_free(setup->dem0_pin);
	57	gpio_free(setup->dem1_pin);
	58	gpio_free(setup->pdad_pin);
	59	gpio_free(setup->pdda_pin);
	60	}
	61
	62	static int pcm3008_soc_probe(struct platform_device *pdev)
	63	{
	64	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
65	struct snd_soc_codec *codec;
66	struct pcm3008_setup_data *setup = socdev->codec_data;
67	int ret = 0;
68
69	printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);
70
71	socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
72	if (!socdev->codec)
73	return -ENOMEM;
74
75	codec = socdev->codec;
76	mutex_init(&codec->mutex);
77
78	codec->name = "PCM3008";
79	codec->owner = THIS_MODULE;
80	codec->dai = &pcm3008_dai;
81	codec->num_dai = 1;
82	codec->write = NULL;
83	codec->read = NULL;
84	INIT_LIST_HEAD(&codec->dapm_widgets);
85	INIT_LIST_HEAD(&codec->dapm_paths);
86
87	/* Register PCMs. */
88	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
89	if (ret < 0) {
90	printk(KERN_ERR "pcm3008: failed to create pcms\n");
91	goto pcm_err;
92	}
93
94	/* Register Card. */
95	ret = snd_soc_register_card(socdev);
96	if (ret < 0) {
97	printk(KERN_ERR "pcm3008: failed to register card\n");
98	goto card_err;
99	}
100
101	/* DEM1 DEM0 DE-EMPHASIS_MODE
102	* Low Low De-emphasis 44.1 kHz ON
103	* Low High De-emphasis OFF
104	* High Low De-emphasis 48 kHz ON
105	* High High De-emphasis 32 kHz ON
106	*/
107
108	/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
109	ret = gpio_request(setup->dem0_pin, "codec_dem0");
110	if (ret == 0)
111	ret = gpio_direction_output(setup->dem0_pin, 1);
112	if (ret != 0)
113	goto gpio_err;
114
115	/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
116	ret = gpio_request(setup->dem1_pin, "codec_dem1");
117	if (ret == 0)
118	ret = gpio_direction_output(setup->dem1_pin, 0);
119	if (ret != 0)
120	goto gpio_err;
121
122	/* Configure PDAD GPIO. */
123	ret = gpio_request(setup->pdad_pin, "codec_pdad");
124	if (ret == 0)
125	ret = gpio_direction_output(setup->pdad_pin, 1);
126	if (ret != 0)
127	goto gpio_err;
128
129	/* Configure PDDA GPIO. */
130	ret = gpio_request(setup->pdda_pin, "codec_pdda");
131	if (ret == 0)
132	ret = gpio_direction_output(setup->pdda_pin, 1);
133	if (ret != 0)
134	goto gpio_err;
135
136	return ret;
137
138	gpio_err:
139	pcm3008_gpio_free(setup);
140	card_err:
141	snd_soc_free_pcms(socdev);
142	pcm_err:
143	kfree(socdev->codec);
144
145	return ret;
146	}
147
148	static int pcm3008_soc_remove(struct platform_device *pdev)
149	{
150	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
151	struct snd_soc_codec *codec = socdev->codec;
152	struct pcm3008_setup_data *setup = socdev->codec_data;
153
154	if (!codec)
155	return 0;
156
157	pcm3008_gpio_free(setup);
158	snd_soc_free_pcms(socdev);
159	kfree(socdev->codec);
160
161	return 0;
162	}
163
164	#ifdef CONFIG_PM
165	static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg)
166	{
167	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
168	struct pcm3008_setup_data *setup = socdev->codec_data;
169
170	gpio_set_value(setup->pdad_pin, 0);
171	gpio_set_value(setup->pdda_pin, 0);
172
173	return 0;
174	}
175
176	static int pcm3008_soc_resume(struct platform_device *pdev)
177	{
178	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
179	struct pcm3008_setup_data *setup = socdev->codec_data;
180
181	gpio_set_value(setup->pdad_pin, 1);
182	gpio_set_value(setup->pdda_pin, 1);
183
184	return 0;
185	}
186	#else
187	#define pcm3008_soc_suspend NULL
188	#define pcm3008_soc_resume NULL
189	#endif
190
191	struct snd_soc_codec_device soc_codec_dev_pcm3008 = {
192	.probe = pcm3008_soc_probe,
193	.remove = pcm3008_soc_remove,
194	.suspend = pcm3008_soc_suspend,
195	.resume = pcm3008_soc_resume,
196	};
197	EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008);
198
199	MODULE_DESCRIPTION("Soc PCM3008 driver");
200	MODULE_AUTHOR("Hugo Villeneuve");
201	MODULE_LICENSE("GPL");