171cfc902SMark Brown /* 271cfc902SMark Brown * wm8728.c -- WM8728 ALSA SoC Audio driver 371cfc902SMark Brown * 471cfc902SMark Brown * Copyright 2008 Wolfson Microelectronics plc 571cfc902SMark Brown * 671cfc902SMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 771cfc902SMark Brown * 871cfc902SMark Brown * This program is free software; you can redistribute it and/or modify 971cfc902SMark Brown * it under the terms of the GNU General Public License version 2 as 1071cfc902SMark Brown * published by the Free Software Foundation. 1171cfc902SMark Brown */ 1271cfc902SMark Brown 1371cfc902SMark Brown #include <linux/module.h> 1471cfc902SMark Brown #include <linux/moduleparam.h> 1571cfc902SMark Brown #include <linux/init.h> 1671cfc902SMark Brown #include <linux/delay.h> 1771cfc902SMark Brown #include <linux/pm.h> 1871cfc902SMark Brown #include <linux/i2c.h> 1971cfc902SMark Brown #include <linux/platform_device.h> 2071cfc902SMark Brown #include <linux/spi/spi.h> 2171cfc902SMark Brown #include <sound/core.h> 2271cfc902SMark Brown #include <sound/pcm.h> 2371cfc902SMark Brown #include <sound/pcm_params.h> 2471cfc902SMark Brown #include <sound/soc.h> 2571cfc902SMark Brown #include <sound/soc-dapm.h> 2671cfc902SMark Brown #include <sound/initval.h> 2771cfc902SMark Brown #include <sound/tlv.h> 2871cfc902SMark Brown 2971cfc902SMark Brown #include "wm8728.h" 3071cfc902SMark Brown 3171cfc902SMark Brown struct snd_soc_codec_device soc_codec_dev_wm8728; 3271cfc902SMark Brown 3371cfc902SMark Brown /* 3471cfc902SMark Brown * We can't read the WM8728 register space so we cache them instead. 3571cfc902SMark Brown * Note that the defaults here aren't the physical defaults, we latch 3671cfc902SMark Brown * the volume update bits, mute the output and enable infinite zero 3771cfc902SMark Brown * detect. 3871cfc902SMark Brown */ 3971cfc902SMark Brown static const u16 wm8728_reg_defaults[] = { 4071cfc902SMark Brown 0x1ff, 4171cfc902SMark Brown 0x1ff, 4271cfc902SMark Brown 0x001, 4371cfc902SMark Brown 0x100, 4471cfc902SMark Brown }; 4571cfc902SMark Brown 4671cfc902SMark Brown static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); 4771cfc902SMark Brown 4871cfc902SMark Brown static const struct snd_kcontrol_new wm8728_snd_controls[] = { 4971cfc902SMark Brown 5071cfc902SMark Brown SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, 5171cfc902SMark Brown 0, 255, 0, wm8728_tlv), 5271cfc902SMark Brown 5371cfc902SMark Brown SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), 5471cfc902SMark Brown }; 5571cfc902SMark Brown 5671cfc902SMark Brown /* 5771cfc902SMark Brown * DAPM controls. 5871cfc902SMark Brown */ 5971cfc902SMark Brown static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { 6071cfc902SMark Brown SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), 6171cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTL"), 6271cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTR"), 6371cfc902SMark Brown }; 6471cfc902SMark Brown 6571cfc902SMark Brown static const struct snd_soc_dapm_route intercon[] = { 6671cfc902SMark Brown {"VOUTL", NULL, "DAC"}, 6771cfc902SMark Brown {"VOUTR", NULL, "DAC"}, 6871cfc902SMark Brown }; 6971cfc902SMark Brown 7071cfc902SMark Brown static int wm8728_add_widgets(struct snd_soc_codec *codec) 7171cfc902SMark Brown { 7271cfc902SMark Brown snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets, 7371cfc902SMark Brown ARRAY_SIZE(wm8728_dapm_widgets)); 7471cfc902SMark Brown 7571cfc902SMark Brown snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); 7671cfc902SMark Brown 7771cfc902SMark Brown return 0; 7871cfc902SMark Brown } 7971cfc902SMark Brown 8071cfc902SMark Brown static int wm8728_mute(struct snd_soc_dai *dai, int mute) 8171cfc902SMark Brown { 8271cfc902SMark Brown struct snd_soc_codec *codec = dai->codec; 8317a52fd6SMark Brown u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); 8471cfc902SMark Brown 8571cfc902SMark Brown if (mute) 8617a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); 8771cfc902SMark Brown else 8817a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); 8971cfc902SMark Brown 9071cfc902SMark Brown return 0; 9171cfc902SMark Brown } 9271cfc902SMark Brown 9371cfc902SMark Brown static int wm8728_hw_params(struct snd_pcm_substream *substream, 94dee89c4dSMark Brown struct snd_pcm_hw_params *params, 95dee89c4dSMark Brown struct snd_soc_dai *dai) 9671cfc902SMark Brown { 9771cfc902SMark Brown struct snd_soc_pcm_runtime *rtd = substream->private_data; 9871cfc902SMark Brown struct snd_soc_device *socdev = rtd->socdev; 996627a653SMark Brown struct snd_soc_codec *codec = socdev->card->codec; 10017a52fd6SMark Brown u16 dac = snd_soc_read(codec, WM8728_DACCTL); 10171cfc902SMark Brown 10271cfc902SMark Brown dac &= ~0x18; 10371cfc902SMark Brown 10471cfc902SMark Brown switch (params_format(params)) { 10571cfc902SMark Brown case SNDRV_PCM_FORMAT_S16_LE: 10671cfc902SMark Brown break; 10771cfc902SMark Brown case SNDRV_PCM_FORMAT_S20_3LE: 10871cfc902SMark Brown dac |= 0x10; 10971cfc902SMark Brown break; 11071cfc902SMark Brown case SNDRV_PCM_FORMAT_S24_LE: 11171cfc902SMark Brown dac |= 0x08; 11271cfc902SMark Brown break; 11371cfc902SMark Brown default: 11471cfc902SMark Brown return -EINVAL; 11571cfc902SMark Brown } 11671cfc902SMark Brown 11717a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, dac); 11871cfc902SMark Brown 11971cfc902SMark Brown return 0; 12071cfc902SMark Brown } 12171cfc902SMark Brown 12271cfc902SMark Brown static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, 12371cfc902SMark Brown unsigned int fmt) 12471cfc902SMark Brown { 12571cfc902SMark Brown struct snd_soc_codec *codec = codec_dai->codec; 12617a52fd6SMark Brown u16 iface = snd_soc_read(codec, WM8728_IFCTL); 12771cfc902SMark Brown 12871cfc902SMark Brown /* Currently only I2S is supported by the driver, though the 12971cfc902SMark Brown * hardware is more flexible. 13071cfc902SMark Brown */ 13171cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 13271cfc902SMark Brown case SND_SOC_DAIFMT_I2S: 13371cfc902SMark Brown iface |= 1; 13471cfc902SMark Brown break; 13571cfc902SMark Brown default: 13671cfc902SMark Brown return -EINVAL; 13771cfc902SMark Brown } 13871cfc902SMark Brown 13971cfc902SMark Brown /* The hardware only support full slave mode */ 14071cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 14171cfc902SMark Brown case SND_SOC_DAIFMT_CBS_CFS: 14271cfc902SMark Brown break; 14371cfc902SMark Brown default: 14471cfc902SMark Brown return -EINVAL; 14571cfc902SMark Brown } 14671cfc902SMark Brown 14771cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 14871cfc902SMark Brown case SND_SOC_DAIFMT_NB_NF: 14971cfc902SMark Brown iface &= ~0x22; 15071cfc902SMark Brown break; 15171cfc902SMark Brown case SND_SOC_DAIFMT_IB_NF: 15271cfc902SMark Brown iface |= 0x20; 15371cfc902SMark Brown iface &= ~0x02; 15471cfc902SMark Brown break; 15571cfc902SMark Brown case SND_SOC_DAIFMT_NB_IF: 15671cfc902SMark Brown iface |= 0x02; 15771cfc902SMark Brown iface &= ~0x20; 15871cfc902SMark Brown break; 15971cfc902SMark Brown case SND_SOC_DAIFMT_IB_IF: 16071cfc902SMark Brown iface |= 0x22; 16171cfc902SMark Brown break; 16271cfc902SMark Brown default: 16371cfc902SMark Brown return -EINVAL; 16471cfc902SMark Brown } 16571cfc902SMark Brown 16617a52fd6SMark Brown snd_soc_write(codec, WM8728_IFCTL, iface); 16771cfc902SMark Brown return 0; 16871cfc902SMark Brown } 16971cfc902SMark Brown 17071cfc902SMark Brown static int wm8728_set_bias_level(struct snd_soc_codec *codec, 17171cfc902SMark Brown enum snd_soc_bias_level level) 17271cfc902SMark Brown { 17371cfc902SMark Brown u16 reg; 17471cfc902SMark Brown int i; 17571cfc902SMark Brown 17671cfc902SMark Brown switch (level) { 17771cfc902SMark Brown case SND_SOC_BIAS_ON: 17871cfc902SMark Brown case SND_SOC_BIAS_PREPARE: 17971cfc902SMark Brown case SND_SOC_BIAS_STANDBY: 18071cfc902SMark Brown if (codec->bias_level == SND_SOC_BIAS_OFF) { 18171cfc902SMark Brown /* Power everything up... */ 18217a52fd6SMark Brown reg = snd_soc_read(codec, WM8728_DACCTL); 18317a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); 18471cfc902SMark Brown 18571cfc902SMark Brown /* ..then sync in the register cache. */ 18671cfc902SMark Brown for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) 18717a52fd6SMark Brown snd_soc_write(codec, i, 18817a52fd6SMark Brown snd_soc_read(codec, i)); 18971cfc902SMark Brown } 19071cfc902SMark Brown break; 19171cfc902SMark Brown 19271cfc902SMark Brown case SND_SOC_BIAS_OFF: 19317a52fd6SMark Brown reg = snd_soc_read(codec, WM8728_DACCTL); 19417a52fd6SMark Brown snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); 19571cfc902SMark Brown break; 19671cfc902SMark Brown } 19771cfc902SMark Brown codec->bias_level = level; 19871cfc902SMark Brown return 0; 19971cfc902SMark Brown } 20071cfc902SMark Brown 20171cfc902SMark Brown #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) 20271cfc902SMark Brown 20371cfc902SMark Brown #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 20471cfc902SMark Brown SNDRV_PCM_FMTBIT_S24_LE) 20571cfc902SMark Brown 2066335d055SEric Miao static struct snd_soc_dai_ops wm8728_dai_ops = { 2076335d055SEric Miao .hw_params = wm8728_hw_params, 2086335d055SEric Miao .digital_mute = wm8728_mute, 2096335d055SEric Miao .set_fmt = wm8728_set_dai_fmt, 2106335d055SEric Miao }; 2116335d055SEric Miao 21271cfc902SMark Brown struct snd_soc_dai wm8728_dai = { 21371cfc902SMark Brown .name = "WM8728", 21471cfc902SMark Brown .playback = { 21571cfc902SMark Brown .stream_name = "Playback", 21671cfc902SMark Brown .channels_min = 2, 21771cfc902SMark Brown .channels_max = 2, 21871cfc902SMark Brown .rates = WM8728_RATES, 21971cfc902SMark Brown .formats = WM8728_FORMATS, 22071cfc902SMark Brown }, 2216335d055SEric Miao .ops = &wm8728_dai_ops, 22271cfc902SMark Brown }; 22371cfc902SMark Brown EXPORT_SYMBOL_GPL(wm8728_dai); 22471cfc902SMark Brown 22571cfc902SMark Brown static int wm8728_suspend(struct platform_device *pdev, pm_message_t state) 22671cfc902SMark Brown { 22771cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 2286627a653SMark Brown struct snd_soc_codec *codec = socdev->card->codec; 22971cfc902SMark Brown 23071cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); 23171cfc902SMark Brown 23271cfc902SMark Brown return 0; 23371cfc902SMark Brown } 23471cfc902SMark Brown 23571cfc902SMark Brown static int wm8728_resume(struct platform_device *pdev) 23671cfc902SMark Brown { 23771cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 2386627a653SMark Brown struct snd_soc_codec *codec = socdev->card->codec; 23971cfc902SMark Brown 24029e189c2SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 24171cfc902SMark Brown 24271cfc902SMark Brown return 0; 24371cfc902SMark Brown } 24471cfc902SMark Brown 24571cfc902SMark Brown /* 24671cfc902SMark Brown * initialise the WM8728 driver 24771cfc902SMark Brown * register the mixer and dsp interfaces with the kernel 24871cfc902SMark Brown */ 2497084a42bSMark Brown static int wm8728_init(struct snd_soc_device *socdev, 2507084a42bSMark Brown enum snd_soc_control_type control) 25171cfc902SMark Brown { 2526627a653SMark Brown struct snd_soc_codec *codec = socdev->card->codec; 25371cfc902SMark Brown int ret = 0; 25471cfc902SMark Brown 25571cfc902SMark Brown codec->name = "WM8728"; 25671cfc902SMark Brown codec->owner = THIS_MODULE; 25771cfc902SMark Brown codec->set_bias_level = wm8728_set_bias_level; 25871cfc902SMark Brown codec->dai = &wm8728_dai; 25971cfc902SMark Brown codec->num_dai = 1; 26071cfc902SMark Brown codec->bias_level = SND_SOC_BIAS_OFF; 26171cfc902SMark Brown codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults); 26271cfc902SMark Brown codec->reg_cache = kmemdup(wm8728_reg_defaults, 26371cfc902SMark Brown sizeof(wm8728_reg_defaults), 26471cfc902SMark Brown GFP_KERNEL); 26571cfc902SMark Brown if (codec->reg_cache == NULL) 26671cfc902SMark Brown return -ENOMEM; 26771cfc902SMark Brown 2687084a42bSMark Brown ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); 26917a52fd6SMark Brown if (ret < 0) { 27017a52fd6SMark Brown printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n", 27117a52fd6SMark Brown ret); 27217a52fd6SMark Brown goto err; 27317a52fd6SMark Brown } 27417a52fd6SMark Brown 27571cfc902SMark Brown /* register pcms */ 27671cfc902SMark Brown ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 27771cfc902SMark Brown if (ret < 0) { 27871cfc902SMark Brown printk(KERN_ERR "wm8728: failed to create pcms\n"); 27917a52fd6SMark Brown goto err; 28071cfc902SMark Brown } 28171cfc902SMark Brown 28271cfc902SMark Brown /* power on device */ 28371cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 28471cfc902SMark Brown 2853e8e1952SIan Molton snd_soc_add_controls(codec, wm8728_snd_controls, 2863e8e1952SIan Molton ARRAY_SIZE(wm8728_snd_controls)); 28771cfc902SMark Brown wm8728_add_widgets(codec); 28871cfc902SMark Brown 28971cfc902SMark Brown return ret; 29071cfc902SMark Brown 29117a52fd6SMark Brown err: 29271cfc902SMark Brown kfree(codec->reg_cache); 29371cfc902SMark Brown return ret; 29471cfc902SMark Brown } 29571cfc902SMark Brown 29671cfc902SMark Brown static struct snd_soc_device *wm8728_socdev; 29771cfc902SMark Brown 29871cfc902SMark Brown #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 29971cfc902SMark Brown 30071cfc902SMark Brown /* 30171cfc902SMark Brown * WM8728 2 wire address is determined by GPIO5 30271cfc902SMark Brown * state during powerup. 30371cfc902SMark Brown * low = 0x1a 30471cfc902SMark Brown * high = 0x1b 30571cfc902SMark Brown */ 30671cfc902SMark Brown 30771cfc902SMark Brown static int wm8728_i2c_probe(struct i2c_client *i2c, 30871cfc902SMark Brown const struct i2c_device_id *id) 30971cfc902SMark Brown { 31071cfc902SMark Brown struct snd_soc_device *socdev = wm8728_socdev; 3116627a653SMark Brown struct snd_soc_codec *codec = socdev->card->codec; 31271cfc902SMark Brown int ret; 31371cfc902SMark Brown 31471cfc902SMark Brown i2c_set_clientdata(i2c, codec); 31571cfc902SMark Brown codec->control_data = i2c; 31671cfc902SMark Brown 3177084a42bSMark Brown ret = wm8728_init(socdev, SND_SOC_I2C); 31871cfc902SMark Brown if (ret < 0) 31971cfc902SMark Brown pr_err("failed to initialise WM8728\n"); 32071cfc902SMark Brown 32171cfc902SMark Brown return ret; 32271cfc902SMark Brown } 32371cfc902SMark Brown 32471cfc902SMark Brown static int wm8728_i2c_remove(struct i2c_client *client) 32571cfc902SMark Brown { 32671cfc902SMark Brown struct snd_soc_codec *codec = i2c_get_clientdata(client); 32771cfc902SMark Brown kfree(codec->reg_cache); 32871cfc902SMark Brown return 0; 32971cfc902SMark Brown } 33071cfc902SMark Brown 33171cfc902SMark Brown static const struct i2c_device_id wm8728_i2c_id[] = { 33271cfc902SMark Brown { "wm8728", 0 }, 33371cfc902SMark Brown { } 33471cfc902SMark Brown }; 33571cfc902SMark Brown MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); 33671cfc902SMark Brown 33771cfc902SMark Brown static struct i2c_driver wm8728_i2c_driver = { 33871cfc902SMark Brown .driver = { 33971cfc902SMark Brown .name = "WM8728 I2C Codec", 34071cfc902SMark Brown .owner = THIS_MODULE, 34171cfc902SMark Brown }, 34271cfc902SMark Brown .probe = wm8728_i2c_probe, 34371cfc902SMark Brown .remove = wm8728_i2c_remove, 34471cfc902SMark Brown .id_table = wm8728_i2c_id, 34571cfc902SMark Brown }; 34671cfc902SMark Brown 34771cfc902SMark Brown static int wm8728_add_i2c_device(struct platform_device *pdev, 34871cfc902SMark Brown const struct wm8728_setup_data *setup) 34971cfc902SMark Brown { 35071cfc902SMark Brown struct i2c_board_info info; 35171cfc902SMark Brown struct i2c_adapter *adapter; 35271cfc902SMark Brown struct i2c_client *client; 35371cfc902SMark Brown int ret; 35471cfc902SMark Brown 35571cfc902SMark Brown ret = i2c_add_driver(&wm8728_i2c_driver); 35671cfc902SMark Brown if (ret != 0) { 35771cfc902SMark Brown dev_err(&pdev->dev, "can't add i2c driver\n"); 35871cfc902SMark Brown return ret; 35971cfc902SMark Brown } 36071cfc902SMark Brown 36171cfc902SMark Brown memset(&info, 0, sizeof(struct i2c_board_info)); 36271cfc902SMark Brown info.addr = setup->i2c_address; 36371cfc902SMark Brown strlcpy(info.type, "wm8728", I2C_NAME_SIZE); 36471cfc902SMark Brown 36571cfc902SMark Brown adapter = i2c_get_adapter(setup->i2c_bus); 36671cfc902SMark Brown if (!adapter) { 36771cfc902SMark Brown dev_err(&pdev->dev, "can't get i2c adapter %d\n", 36871cfc902SMark Brown setup->i2c_bus); 36971cfc902SMark Brown goto err_driver; 37071cfc902SMark Brown } 37171cfc902SMark Brown 37271cfc902SMark Brown client = i2c_new_device(adapter, &info); 37371cfc902SMark Brown i2c_put_adapter(adapter); 37471cfc902SMark Brown if (!client) { 37571cfc902SMark Brown dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", 37671cfc902SMark Brown (unsigned int)info.addr); 37771cfc902SMark Brown goto err_driver; 37871cfc902SMark Brown } 37971cfc902SMark Brown 38071cfc902SMark Brown return 0; 38171cfc902SMark Brown 38271cfc902SMark Brown err_driver: 38371cfc902SMark Brown i2c_del_driver(&wm8728_i2c_driver); 38471cfc902SMark Brown return -ENODEV; 38571cfc902SMark Brown } 38671cfc902SMark Brown #endif 38771cfc902SMark Brown 38871cfc902SMark Brown #if defined(CONFIG_SPI_MASTER) 38971cfc902SMark Brown static int __devinit wm8728_spi_probe(struct spi_device *spi) 39071cfc902SMark Brown { 39171cfc902SMark Brown struct snd_soc_device *socdev = wm8728_socdev; 3926627a653SMark Brown struct snd_soc_codec *codec = socdev->card->codec; 39371cfc902SMark Brown int ret; 39471cfc902SMark Brown 39571cfc902SMark Brown codec->control_data = spi; 39671cfc902SMark Brown 3977084a42bSMark Brown ret = wm8728_init(socdev, SND_SOC_SPI); 39871cfc902SMark Brown if (ret < 0) 39971cfc902SMark Brown dev_err(&spi->dev, "failed to initialise WM8728\n"); 40071cfc902SMark Brown 40171cfc902SMark Brown return ret; 40271cfc902SMark Brown } 40371cfc902SMark Brown 40471cfc902SMark Brown static int __devexit wm8728_spi_remove(struct spi_device *spi) 40571cfc902SMark Brown { 40671cfc902SMark Brown return 0; 40771cfc902SMark Brown } 40871cfc902SMark Brown 40971cfc902SMark Brown static struct spi_driver wm8728_spi_driver = { 41071cfc902SMark Brown .driver = { 41171cfc902SMark Brown .name = "wm8728", 41271cfc902SMark Brown .bus = &spi_bus_type, 41371cfc902SMark Brown .owner = THIS_MODULE, 41471cfc902SMark Brown }, 41571cfc902SMark Brown .probe = wm8728_spi_probe, 41671cfc902SMark Brown .remove = __devexit_p(wm8728_spi_remove), 41771cfc902SMark Brown }; 41871cfc902SMark Brown #endif /* CONFIG_SPI_MASTER */ 41971cfc902SMark Brown 42071cfc902SMark Brown static int wm8728_probe(struct platform_device *pdev) 42171cfc902SMark Brown { 42271cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 42371cfc902SMark Brown struct wm8728_setup_data *setup; 42471cfc902SMark Brown struct snd_soc_codec *codec; 42571cfc902SMark Brown int ret = 0; 42671cfc902SMark Brown 42771cfc902SMark Brown setup = socdev->codec_data; 42871cfc902SMark Brown codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 42971cfc902SMark Brown if (codec == NULL) 43071cfc902SMark Brown return -ENOMEM; 43171cfc902SMark Brown 4326627a653SMark Brown socdev->card->codec = codec; 43371cfc902SMark Brown mutex_init(&codec->mutex); 43471cfc902SMark Brown INIT_LIST_HEAD(&codec->dapm_widgets); 43571cfc902SMark Brown INIT_LIST_HEAD(&codec->dapm_paths); 43671cfc902SMark Brown 43771cfc902SMark Brown wm8728_socdev = socdev; 43871cfc902SMark Brown ret = -ENODEV; 43971cfc902SMark Brown 44071cfc902SMark Brown #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 44171cfc902SMark Brown if (setup->i2c_address) { 44271cfc902SMark Brown ret = wm8728_add_i2c_device(pdev, setup); 44371cfc902SMark Brown } 44471cfc902SMark Brown #endif 44571cfc902SMark Brown #if defined(CONFIG_SPI_MASTER) 44671cfc902SMark Brown if (setup->spi) { 44771cfc902SMark Brown ret = spi_register_driver(&wm8728_spi_driver); 44871cfc902SMark Brown if (ret != 0) 44971cfc902SMark Brown printk(KERN_ERR "can't add spi driver"); 45071cfc902SMark Brown } 45171cfc902SMark Brown #endif 45271cfc902SMark Brown 45371cfc902SMark Brown if (ret != 0) 45471cfc902SMark Brown kfree(codec); 45571cfc902SMark Brown 45671cfc902SMark Brown return ret; 45771cfc902SMark Brown } 45871cfc902SMark Brown 45971cfc902SMark Brown /* power down chip */ 46071cfc902SMark Brown static int wm8728_remove(struct platform_device *pdev) 46171cfc902SMark Brown { 46271cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 4636627a653SMark Brown struct snd_soc_codec *codec = socdev->card->codec; 46471cfc902SMark Brown 46571cfc902SMark Brown if (codec->control_data) 46671cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); 46771cfc902SMark Brown 46871cfc902SMark Brown snd_soc_free_pcms(socdev); 46971cfc902SMark Brown snd_soc_dapm_free(socdev); 47071cfc902SMark Brown #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 47171cfc902SMark Brown i2c_unregister_device(codec->control_data); 47271cfc902SMark Brown i2c_del_driver(&wm8728_i2c_driver); 47371cfc902SMark Brown #endif 47471cfc902SMark Brown #if defined(CONFIG_SPI_MASTER) 47571cfc902SMark Brown spi_unregister_driver(&wm8728_spi_driver); 47671cfc902SMark Brown #endif 47771cfc902SMark Brown kfree(codec); 47871cfc902SMark Brown 47971cfc902SMark Brown return 0; 48071cfc902SMark Brown } 48171cfc902SMark Brown 48271cfc902SMark Brown struct snd_soc_codec_device soc_codec_dev_wm8728 = { 48371cfc902SMark Brown .probe = wm8728_probe, 48471cfc902SMark Brown .remove = wm8728_remove, 48571cfc902SMark Brown .suspend = wm8728_suspend, 48671cfc902SMark Brown .resume = wm8728_resume, 48771cfc902SMark Brown }; 48871cfc902SMark Brown EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728); 48971cfc902SMark Brown 490c9b3a40fSTakashi Iwai static int __init wm8728_modinit(void) 49164089b84SMark Brown { 49264089b84SMark Brown return snd_soc_register_dai(&wm8728_dai); 49364089b84SMark Brown } 49464089b84SMark Brown module_init(wm8728_modinit); 49564089b84SMark Brown 49664089b84SMark Brown static void __exit wm8728_exit(void) 49764089b84SMark Brown { 49864089b84SMark Brown snd_soc_unregister_dai(&wm8728_dai); 49964089b84SMark Brown } 50064089b84SMark Brown module_exit(wm8728_exit); 50164089b84SMark Brown 50271cfc902SMark Brown MODULE_DESCRIPTION("ASoC WM8728 driver"); 50371cfc902SMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 50471cfc902SMark Brown MODULE_LICENSE("GPL"); 505