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 <linux/slab.h> 23#include <sound/core.h> 24#include <sound/pcm.h> 25#include <sound/initval.h> 26#include <sound/soc.h> 27 28#include "pcm3008.h" 29 30#define PCM3008_VERSION "0.2" 31 32#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 33 SNDRV_PCM_RATE_48000) 34 35struct snd_soc_dai pcm3008_dai = { 36 .name = "PCM3008 HiFi", 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}; 52EXPORT_SYMBOL_GPL(pcm3008_dai); 53 54static 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 62static 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->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 72 if (!socdev->card->codec) 73 return -ENOMEM; 74 75 codec = socdev->card->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 /* DEM1 DEM0 DE-EMPHASIS_MODE 95 * Low Low De-emphasis 44.1 kHz ON 96 * Low High De-emphasis OFF 97 * High Low De-emphasis 48 kHz ON 98 * High High De-emphasis 32 kHz ON 99 */ 100 101 /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */ 102 ret = gpio_request(setup->dem0_pin, "codec_dem0"); 103 if (ret == 0) 104 ret = gpio_direction_output(setup->dem0_pin, 1); 105 if (ret != 0) 106 goto gpio_err; 107 108 /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */ 109 ret = gpio_request(setup->dem1_pin, "codec_dem1"); 110 if (ret == 0) 111 ret = gpio_direction_output(setup->dem1_pin, 0); 112 if (ret != 0) 113 goto gpio_err; 114 115 /* Configure PDAD GPIO. */ 116 ret = gpio_request(setup->pdad_pin, "codec_pdad"); 117 if (ret == 0) 118 ret = gpio_direction_output(setup->pdad_pin, 1); 119 if (ret != 0) 120 goto gpio_err; 121 122 /* Configure PDDA GPIO. */ 123 ret = gpio_request(setup->pdda_pin, "codec_pdda"); 124 if (ret == 0) 125 ret = gpio_direction_output(setup->pdda_pin, 1); 126 if (ret != 0) 127 goto gpio_err; 128 129 return ret; 130 131gpio_err: 132 pcm3008_gpio_free(setup); 133pcm_err: 134 kfree(socdev->card->codec); 135 136 return ret; 137} 138 139static int pcm3008_soc_remove(struct platform_device *pdev) 140{ 141 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 142 struct snd_soc_codec *codec = socdev->card->codec; 143 struct pcm3008_setup_data *setup = socdev->codec_data; 144 145 if (!codec) 146 return 0; 147 148 pcm3008_gpio_free(setup); 149 snd_soc_free_pcms(socdev); 150 kfree(socdev->card->codec); 151 152 return 0; 153} 154 155#ifdef CONFIG_PM 156static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg) 157{ 158 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 159 struct pcm3008_setup_data *setup = socdev->codec_data; 160 161 gpio_set_value(setup->pdad_pin, 0); 162 gpio_set_value(setup->pdda_pin, 0); 163 164 return 0; 165} 166 167static int pcm3008_soc_resume(struct platform_device *pdev) 168{ 169 struct snd_soc_device *socdev = platform_get_drvdata(pdev); 170 struct pcm3008_setup_data *setup = socdev->codec_data; 171 172 gpio_set_value(setup->pdad_pin, 1); 173 gpio_set_value(setup->pdda_pin, 1); 174 175 return 0; 176} 177#else 178#define pcm3008_soc_suspend NULL 179#define pcm3008_soc_resume NULL 180#endif 181 182struct snd_soc_codec_device soc_codec_dev_pcm3008 = { 183 .probe = pcm3008_soc_probe, 184 .remove = pcm3008_soc_remove, 185 .suspend = pcm3008_soc_suspend, 186 .resume = pcm3008_soc_resume, 187}; 188EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008); 189 190static int __init pcm3008_init(void) 191{ 192 return snd_soc_register_dai(&pcm3008_dai); 193} 194module_init(pcm3008_init); 195 196static void __exit pcm3008_exit(void) 197{ 198 snd_soc_unregister_dai(&pcm3008_dai); 199} 200module_exit(pcm3008_exit); 201 202MODULE_DESCRIPTION("Soc PCM3008 driver"); 203MODULE_AUTHOR("Hugo Villeneuve"); 204MODULE_LICENSE("GPL"); 205