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 inline unsigned int wm8728_read_reg_cache(struct snd_soc_codec *codec, 4771cfc902SMark Brown unsigned int reg) 4871cfc902SMark Brown { 4971cfc902SMark Brown u16 *cache = codec->reg_cache; 5071cfc902SMark Brown BUG_ON(reg > ARRAY_SIZE(wm8728_reg_defaults)); 5171cfc902SMark Brown return cache[reg]; 5271cfc902SMark Brown } 5371cfc902SMark Brown 5471cfc902SMark Brown static inline void wm8728_write_reg_cache(struct snd_soc_codec *codec, 5571cfc902SMark Brown u16 reg, unsigned int value) 5671cfc902SMark Brown { 5771cfc902SMark Brown u16 *cache = codec->reg_cache; 5871cfc902SMark Brown BUG_ON(reg > ARRAY_SIZE(wm8728_reg_defaults)); 5971cfc902SMark Brown cache[reg] = value; 6071cfc902SMark Brown } 6171cfc902SMark Brown 6271cfc902SMark Brown /* 6371cfc902SMark Brown * write to the WM8728 register space 6471cfc902SMark Brown */ 6571cfc902SMark Brown static int wm8728_write(struct snd_soc_codec *codec, unsigned int reg, 6671cfc902SMark Brown unsigned int value) 6771cfc902SMark Brown { 6871cfc902SMark Brown u8 data[2]; 6971cfc902SMark Brown 7071cfc902SMark Brown /* data is 7171cfc902SMark Brown * D15..D9 WM8728 register offset 7271cfc902SMark Brown * D8...D0 register data 7371cfc902SMark Brown */ 7471cfc902SMark Brown data[0] = (reg << 1) | ((value >> 8) & 0x0001); 7571cfc902SMark Brown data[1] = value & 0x00ff; 7671cfc902SMark Brown 7771cfc902SMark Brown wm8728_write_reg_cache(codec, reg, value); 7871cfc902SMark Brown 7971cfc902SMark Brown if (codec->hw_write(codec->control_data, data, 2) == 2) 8071cfc902SMark Brown return 0; 8171cfc902SMark Brown else 8271cfc902SMark Brown return -EIO; 8371cfc902SMark Brown } 8471cfc902SMark Brown 8571cfc902SMark Brown static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); 8671cfc902SMark Brown 8771cfc902SMark Brown static const struct snd_kcontrol_new wm8728_snd_controls[] = { 8871cfc902SMark Brown 8971cfc902SMark Brown SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, 9071cfc902SMark Brown 0, 255, 0, wm8728_tlv), 9171cfc902SMark Brown 9271cfc902SMark Brown SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), 9371cfc902SMark Brown }; 9471cfc902SMark Brown 9571cfc902SMark Brown static int wm8728_add_controls(struct snd_soc_codec *codec) 9671cfc902SMark Brown { 9771cfc902SMark Brown int err, i; 9871cfc902SMark Brown 9971cfc902SMark Brown for (i = 0; i < ARRAY_SIZE(wm8728_snd_controls); i++) { 10071cfc902SMark Brown err = snd_ctl_add(codec->card, 10171cfc902SMark Brown snd_soc_cnew(&wm8728_snd_controls[i], 10271cfc902SMark Brown codec, NULL)); 10371cfc902SMark Brown if (err < 0) 10471cfc902SMark Brown return err; 10571cfc902SMark Brown } 10671cfc902SMark Brown 10771cfc902SMark Brown return 0; 10871cfc902SMark Brown } 10971cfc902SMark Brown 11071cfc902SMark Brown /* 11171cfc902SMark Brown * DAPM controls. 11271cfc902SMark Brown */ 11371cfc902SMark Brown static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { 11471cfc902SMark Brown SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), 11571cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTL"), 11671cfc902SMark Brown SND_SOC_DAPM_OUTPUT("VOUTR"), 11771cfc902SMark Brown }; 11871cfc902SMark Brown 11971cfc902SMark Brown static const struct snd_soc_dapm_route intercon[] = { 12071cfc902SMark Brown {"VOUTL", NULL, "DAC"}, 12171cfc902SMark Brown {"VOUTR", NULL, "DAC"}, 12271cfc902SMark Brown }; 12371cfc902SMark Brown 12471cfc902SMark Brown static int wm8728_add_widgets(struct snd_soc_codec *codec) 12571cfc902SMark Brown { 12671cfc902SMark Brown snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets, 12771cfc902SMark Brown ARRAY_SIZE(wm8728_dapm_widgets)); 12871cfc902SMark Brown 12971cfc902SMark Brown snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); 13071cfc902SMark Brown 13171cfc902SMark Brown snd_soc_dapm_new_widgets(codec); 13271cfc902SMark Brown 13371cfc902SMark Brown return 0; 13471cfc902SMark Brown } 13571cfc902SMark Brown 13671cfc902SMark Brown static int wm8728_mute(struct snd_soc_dai *dai, int mute) 13771cfc902SMark Brown { 13871cfc902SMark Brown struct snd_soc_codec *codec = dai->codec; 13971cfc902SMark Brown u16 mute_reg = wm8728_read_reg_cache(codec, WM8728_DACCTL); 14071cfc902SMark Brown 14171cfc902SMark Brown if (mute) 14271cfc902SMark Brown wm8728_write(codec, WM8728_DACCTL, mute_reg | 1); 14371cfc902SMark Brown else 14471cfc902SMark Brown wm8728_write(codec, WM8728_DACCTL, mute_reg & ~1); 14571cfc902SMark Brown 14671cfc902SMark Brown return 0; 14771cfc902SMark Brown } 14871cfc902SMark Brown 14971cfc902SMark Brown static int wm8728_hw_params(struct snd_pcm_substream *substream, 150dee89c4dSMark Brown struct snd_pcm_hw_params *params, 151dee89c4dSMark Brown struct snd_soc_dai *dai) 15271cfc902SMark Brown { 15371cfc902SMark Brown struct snd_soc_pcm_runtime *rtd = substream->private_data; 15471cfc902SMark Brown struct snd_soc_device *socdev = rtd->socdev; 15571cfc902SMark Brown struct snd_soc_codec *codec = socdev->codec; 15671cfc902SMark Brown u16 dac = wm8728_read_reg_cache(codec, WM8728_DACCTL); 15771cfc902SMark Brown 15871cfc902SMark Brown dac &= ~0x18; 15971cfc902SMark Brown 16071cfc902SMark Brown switch (params_format(params)) { 16171cfc902SMark Brown case SNDRV_PCM_FORMAT_S16_LE: 16271cfc902SMark Brown break; 16371cfc902SMark Brown case SNDRV_PCM_FORMAT_S20_3LE: 16471cfc902SMark Brown dac |= 0x10; 16571cfc902SMark Brown break; 16671cfc902SMark Brown case SNDRV_PCM_FORMAT_S24_LE: 16771cfc902SMark Brown dac |= 0x08; 16871cfc902SMark Brown break; 16971cfc902SMark Brown default: 17071cfc902SMark Brown return -EINVAL; 17171cfc902SMark Brown } 17271cfc902SMark Brown 17371cfc902SMark Brown wm8728_write(codec, WM8728_DACCTL, dac); 17471cfc902SMark Brown 17571cfc902SMark Brown return 0; 17671cfc902SMark Brown } 17771cfc902SMark Brown 17871cfc902SMark Brown static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, 17971cfc902SMark Brown unsigned int fmt) 18071cfc902SMark Brown { 18171cfc902SMark Brown struct snd_soc_codec *codec = codec_dai->codec; 18271cfc902SMark Brown u16 iface = wm8728_read_reg_cache(codec, WM8728_IFCTL); 18371cfc902SMark Brown 18471cfc902SMark Brown /* Currently only I2S is supported by the driver, though the 18571cfc902SMark Brown * hardware is more flexible. 18671cfc902SMark Brown */ 18771cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 18871cfc902SMark Brown case SND_SOC_DAIFMT_I2S: 18971cfc902SMark Brown iface |= 1; 19071cfc902SMark Brown break; 19171cfc902SMark Brown default: 19271cfc902SMark Brown return -EINVAL; 19371cfc902SMark Brown } 19471cfc902SMark Brown 19571cfc902SMark Brown /* The hardware only support full slave mode */ 19671cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 19771cfc902SMark Brown case SND_SOC_DAIFMT_CBS_CFS: 19871cfc902SMark Brown break; 19971cfc902SMark Brown default: 20071cfc902SMark Brown return -EINVAL; 20171cfc902SMark Brown } 20271cfc902SMark Brown 20371cfc902SMark Brown switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 20471cfc902SMark Brown case SND_SOC_DAIFMT_NB_NF: 20571cfc902SMark Brown iface &= ~0x22; 20671cfc902SMark Brown break; 20771cfc902SMark Brown case SND_SOC_DAIFMT_IB_NF: 20871cfc902SMark Brown iface |= 0x20; 20971cfc902SMark Brown iface &= ~0x02; 21071cfc902SMark Brown break; 21171cfc902SMark Brown case SND_SOC_DAIFMT_NB_IF: 21271cfc902SMark Brown iface |= 0x02; 21371cfc902SMark Brown iface &= ~0x20; 21471cfc902SMark Brown break; 21571cfc902SMark Brown case SND_SOC_DAIFMT_IB_IF: 21671cfc902SMark Brown iface |= 0x22; 21771cfc902SMark Brown break; 21871cfc902SMark Brown default: 21971cfc902SMark Brown return -EINVAL; 22071cfc902SMark Brown } 22171cfc902SMark Brown 22271cfc902SMark Brown wm8728_write(codec, WM8728_IFCTL, iface); 22371cfc902SMark Brown return 0; 22471cfc902SMark Brown } 22571cfc902SMark Brown 22671cfc902SMark Brown static int wm8728_set_bias_level(struct snd_soc_codec *codec, 22771cfc902SMark Brown enum snd_soc_bias_level level) 22871cfc902SMark Brown { 22971cfc902SMark Brown u16 reg; 23071cfc902SMark Brown int i; 23171cfc902SMark Brown 23271cfc902SMark Brown switch (level) { 23371cfc902SMark Brown case SND_SOC_BIAS_ON: 23471cfc902SMark Brown case SND_SOC_BIAS_PREPARE: 23571cfc902SMark Brown case SND_SOC_BIAS_STANDBY: 23671cfc902SMark Brown if (codec->bias_level == SND_SOC_BIAS_OFF) { 23771cfc902SMark Brown /* Power everything up... */ 23871cfc902SMark Brown reg = wm8728_read_reg_cache(codec, WM8728_DACCTL); 23971cfc902SMark Brown wm8728_write(codec, WM8728_DACCTL, reg & ~0x4); 24071cfc902SMark Brown 24171cfc902SMark Brown /* ..then sync in the register cache. */ 24271cfc902SMark Brown for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) 24371cfc902SMark Brown wm8728_write(codec, i, 24471cfc902SMark Brown wm8728_read_reg_cache(codec, i)); 24571cfc902SMark Brown } 24671cfc902SMark Brown break; 24771cfc902SMark Brown 24871cfc902SMark Brown case SND_SOC_BIAS_OFF: 24971cfc902SMark Brown reg = wm8728_read_reg_cache(codec, WM8728_DACCTL); 25071cfc902SMark Brown wm8728_write(codec, WM8728_DACCTL, reg | 0x4); 25171cfc902SMark Brown break; 25271cfc902SMark Brown } 25371cfc902SMark Brown codec->bias_level = level; 25471cfc902SMark Brown return 0; 25571cfc902SMark Brown } 25671cfc902SMark Brown 25771cfc902SMark Brown #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) 25871cfc902SMark Brown 25971cfc902SMark Brown #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 26071cfc902SMark Brown SNDRV_PCM_FMTBIT_S24_LE) 26171cfc902SMark Brown 26271cfc902SMark Brown struct snd_soc_dai wm8728_dai = { 26371cfc902SMark Brown .name = "WM8728", 26471cfc902SMark Brown .playback = { 26571cfc902SMark Brown .stream_name = "Playback", 26671cfc902SMark Brown .channels_min = 2, 26771cfc902SMark Brown .channels_max = 2, 26871cfc902SMark Brown .rates = WM8728_RATES, 26971cfc902SMark Brown .formats = WM8728_FORMATS, 27071cfc902SMark Brown }, 27171cfc902SMark Brown .ops = { 27271cfc902SMark Brown .hw_params = wm8728_hw_params, 27371cfc902SMark Brown .digital_mute = wm8728_mute, 27471cfc902SMark Brown .set_fmt = wm8728_set_dai_fmt, 27571cfc902SMark Brown } 27671cfc902SMark Brown }; 27771cfc902SMark Brown EXPORT_SYMBOL_GPL(wm8728_dai); 27871cfc902SMark Brown 27971cfc902SMark Brown static int wm8728_suspend(struct platform_device *pdev, pm_message_t state) 28071cfc902SMark Brown { 28171cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 28271cfc902SMark Brown struct snd_soc_codec *codec = socdev->codec; 28371cfc902SMark Brown 28471cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); 28571cfc902SMark Brown 28671cfc902SMark Brown return 0; 28771cfc902SMark Brown } 28871cfc902SMark Brown 28971cfc902SMark Brown static int wm8728_resume(struct platform_device *pdev) 29071cfc902SMark Brown { 29171cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 29271cfc902SMark Brown struct snd_soc_codec *codec = socdev->codec; 29371cfc902SMark Brown 29471cfc902SMark Brown wm8728_set_bias_level(codec, codec->suspend_bias_level); 29571cfc902SMark Brown 29671cfc902SMark Brown return 0; 29771cfc902SMark Brown } 29871cfc902SMark Brown 29971cfc902SMark Brown /* 30071cfc902SMark Brown * initialise the WM8728 driver 30171cfc902SMark Brown * register the mixer and dsp interfaces with the kernel 30271cfc902SMark Brown */ 30371cfc902SMark Brown static int wm8728_init(struct snd_soc_device *socdev) 30471cfc902SMark Brown { 30571cfc902SMark Brown struct snd_soc_codec *codec = socdev->codec; 30671cfc902SMark Brown int ret = 0; 30771cfc902SMark Brown 30871cfc902SMark Brown codec->name = "WM8728"; 30971cfc902SMark Brown codec->owner = THIS_MODULE; 31071cfc902SMark Brown codec->read = wm8728_read_reg_cache; 31171cfc902SMark Brown codec->write = wm8728_write; 31271cfc902SMark Brown codec->set_bias_level = wm8728_set_bias_level; 31371cfc902SMark Brown codec->dai = &wm8728_dai; 31471cfc902SMark Brown codec->num_dai = 1; 31571cfc902SMark Brown codec->bias_level = SND_SOC_BIAS_OFF; 31671cfc902SMark Brown codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults); 31771cfc902SMark Brown codec->reg_cache = kmemdup(wm8728_reg_defaults, 31871cfc902SMark Brown sizeof(wm8728_reg_defaults), 31971cfc902SMark Brown GFP_KERNEL); 32071cfc902SMark Brown if (codec->reg_cache == NULL) 32171cfc902SMark Brown return -ENOMEM; 32271cfc902SMark Brown 32371cfc902SMark Brown /* register pcms */ 32471cfc902SMark Brown ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 32571cfc902SMark Brown if (ret < 0) { 32671cfc902SMark Brown printk(KERN_ERR "wm8728: failed to create pcms\n"); 32771cfc902SMark Brown goto pcm_err; 32871cfc902SMark Brown } 32971cfc902SMark Brown 33071cfc902SMark Brown /* power on device */ 33171cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 33271cfc902SMark Brown 33371cfc902SMark Brown wm8728_add_controls(codec); 33471cfc902SMark Brown wm8728_add_widgets(codec); 335968a6025SMark Brown ret = snd_soc_init_card(socdev); 33671cfc902SMark Brown if (ret < 0) { 33771cfc902SMark Brown printk(KERN_ERR "wm8728: failed to register card\n"); 33871cfc902SMark Brown goto card_err; 33971cfc902SMark Brown } 34071cfc902SMark Brown 34171cfc902SMark Brown return ret; 34271cfc902SMark Brown 34371cfc902SMark Brown card_err: 34471cfc902SMark Brown snd_soc_free_pcms(socdev); 34571cfc902SMark Brown snd_soc_dapm_free(socdev); 34671cfc902SMark Brown pcm_err: 34771cfc902SMark Brown kfree(codec->reg_cache); 34871cfc902SMark Brown return ret; 34971cfc902SMark Brown } 35071cfc902SMark Brown 35171cfc902SMark Brown static struct snd_soc_device *wm8728_socdev; 35271cfc902SMark Brown 35371cfc902SMark Brown #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 35471cfc902SMark Brown 35571cfc902SMark Brown /* 35671cfc902SMark Brown * WM8728 2 wire address is determined by GPIO5 35771cfc902SMark Brown * state during powerup. 35871cfc902SMark Brown * low = 0x1a 35971cfc902SMark Brown * high = 0x1b 36071cfc902SMark Brown */ 36171cfc902SMark Brown 36271cfc902SMark Brown static int wm8728_i2c_probe(struct i2c_client *i2c, 36371cfc902SMark Brown const struct i2c_device_id *id) 36471cfc902SMark Brown { 36571cfc902SMark Brown struct snd_soc_device *socdev = wm8728_socdev; 36671cfc902SMark Brown struct snd_soc_codec *codec = socdev->codec; 36771cfc902SMark Brown int ret; 36871cfc902SMark Brown 36971cfc902SMark Brown i2c_set_clientdata(i2c, codec); 37071cfc902SMark Brown codec->control_data = i2c; 37171cfc902SMark Brown 37271cfc902SMark Brown ret = wm8728_init(socdev); 37371cfc902SMark Brown if (ret < 0) 37471cfc902SMark Brown pr_err("failed to initialise WM8728\n"); 37571cfc902SMark Brown 37671cfc902SMark Brown return ret; 37771cfc902SMark Brown } 37871cfc902SMark Brown 37971cfc902SMark Brown static int wm8728_i2c_remove(struct i2c_client *client) 38071cfc902SMark Brown { 38171cfc902SMark Brown struct snd_soc_codec *codec = i2c_get_clientdata(client); 38271cfc902SMark Brown kfree(codec->reg_cache); 38371cfc902SMark Brown return 0; 38471cfc902SMark Brown } 38571cfc902SMark Brown 38671cfc902SMark Brown static const struct i2c_device_id wm8728_i2c_id[] = { 38771cfc902SMark Brown { "wm8728", 0 }, 38871cfc902SMark Brown { } 38971cfc902SMark Brown }; 39071cfc902SMark Brown MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); 39171cfc902SMark Brown 39271cfc902SMark Brown static struct i2c_driver wm8728_i2c_driver = { 39371cfc902SMark Brown .driver = { 39471cfc902SMark Brown .name = "WM8728 I2C Codec", 39571cfc902SMark Brown .owner = THIS_MODULE, 39671cfc902SMark Brown }, 39771cfc902SMark Brown .probe = wm8728_i2c_probe, 39871cfc902SMark Brown .remove = wm8728_i2c_remove, 39971cfc902SMark Brown .id_table = wm8728_i2c_id, 40071cfc902SMark Brown }; 40171cfc902SMark Brown 40271cfc902SMark Brown static int wm8728_add_i2c_device(struct platform_device *pdev, 40371cfc902SMark Brown const struct wm8728_setup_data *setup) 40471cfc902SMark Brown { 40571cfc902SMark Brown struct i2c_board_info info; 40671cfc902SMark Brown struct i2c_adapter *adapter; 40771cfc902SMark Brown struct i2c_client *client; 40871cfc902SMark Brown int ret; 40971cfc902SMark Brown 41071cfc902SMark Brown ret = i2c_add_driver(&wm8728_i2c_driver); 41171cfc902SMark Brown if (ret != 0) { 41271cfc902SMark Brown dev_err(&pdev->dev, "can't add i2c driver\n"); 41371cfc902SMark Brown return ret; 41471cfc902SMark Brown } 41571cfc902SMark Brown 41671cfc902SMark Brown memset(&info, 0, sizeof(struct i2c_board_info)); 41771cfc902SMark Brown info.addr = setup->i2c_address; 41871cfc902SMark Brown strlcpy(info.type, "wm8728", I2C_NAME_SIZE); 41971cfc902SMark Brown 42071cfc902SMark Brown adapter = i2c_get_adapter(setup->i2c_bus); 42171cfc902SMark Brown if (!adapter) { 42271cfc902SMark Brown dev_err(&pdev->dev, "can't get i2c adapter %d\n", 42371cfc902SMark Brown setup->i2c_bus); 42471cfc902SMark Brown goto err_driver; 42571cfc902SMark Brown } 42671cfc902SMark Brown 42771cfc902SMark Brown client = i2c_new_device(adapter, &info); 42871cfc902SMark Brown i2c_put_adapter(adapter); 42971cfc902SMark Brown if (!client) { 43071cfc902SMark Brown dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", 43171cfc902SMark Brown (unsigned int)info.addr); 43271cfc902SMark Brown goto err_driver; 43371cfc902SMark Brown } 43471cfc902SMark Brown 43571cfc902SMark Brown return 0; 43671cfc902SMark Brown 43771cfc902SMark Brown err_driver: 43871cfc902SMark Brown i2c_del_driver(&wm8728_i2c_driver); 43971cfc902SMark Brown return -ENODEV; 44071cfc902SMark Brown } 44171cfc902SMark Brown #endif 44271cfc902SMark Brown 44371cfc902SMark Brown #if defined(CONFIG_SPI_MASTER) 44471cfc902SMark Brown static int __devinit wm8728_spi_probe(struct spi_device *spi) 44571cfc902SMark Brown { 44671cfc902SMark Brown struct snd_soc_device *socdev = wm8728_socdev; 44771cfc902SMark Brown struct snd_soc_codec *codec = socdev->codec; 44871cfc902SMark Brown int ret; 44971cfc902SMark Brown 45071cfc902SMark Brown codec->control_data = spi; 45171cfc902SMark Brown 45271cfc902SMark Brown ret = wm8728_init(socdev); 45371cfc902SMark Brown if (ret < 0) 45471cfc902SMark Brown dev_err(&spi->dev, "failed to initialise WM8728\n"); 45571cfc902SMark Brown 45671cfc902SMark Brown return ret; 45771cfc902SMark Brown } 45871cfc902SMark Brown 45971cfc902SMark Brown static int __devexit wm8728_spi_remove(struct spi_device *spi) 46071cfc902SMark Brown { 46171cfc902SMark Brown return 0; 46271cfc902SMark Brown } 46371cfc902SMark Brown 46471cfc902SMark Brown static struct spi_driver wm8728_spi_driver = { 46571cfc902SMark Brown .driver = { 46671cfc902SMark Brown .name = "wm8728", 46771cfc902SMark Brown .bus = &spi_bus_type, 46871cfc902SMark Brown .owner = THIS_MODULE, 46971cfc902SMark Brown }, 47071cfc902SMark Brown .probe = wm8728_spi_probe, 47171cfc902SMark Brown .remove = __devexit_p(wm8728_spi_remove), 47271cfc902SMark Brown }; 47371cfc902SMark Brown 47471cfc902SMark Brown static int wm8728_spi_write(struct spi_device *spi, const char *data, int len) 47571cfc902SMark Brown { 47671cfc902SMark Brown struct spi_transfer t; 47771cfc902SMark Brown struct spi_message m; 47871cfc902SMark Brown u8 msg[2]; 47971cfc902SMark Brown 48071cfc902SMark Brown if (len <= 0) 48171cfc902SMark Brown return 0; 48271cfc902SMark Brown 48371cfc902SMark Brown msg[0] = data[0]; 48471cfc902SMark Brown msg[1] = data[1]; 48571cfc902SMark Brown 48671cfc902SMark Brown spi_message_init(&m); 48771cfc902SMark Brown memset(&t, 0, (sizeof t)); 48871cfc902SMark Brown 48971cfc902SMark Brown t.tx_buf = &msg[0]; 49071cfc902SMark Brown t.len = len; 49171cfc902SMark Brown 49271cfc902SMark Brown spi_message_add_tail(&t, &m); 49371cfc902SMark Brown spi_sync(spi, &m); 49471cfc902SMark Brown 49571cfc902SMark Brown return len; 49671cfc902SMark Brown } 49771cfc902SMark Brown #endif /* CONFIG_SPI_MASTER */ 49871cfc902SMark Brown 49971cfc902SMark Brown static int wm8728_probe(struct platform_device *pdev) 50071cfc902SMark Brown { 50171cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 50271cfc902SMark Brown struct wm8728_setup_data *setup; 50371cfc902SMark Brown struct snd_soc_codec *codec; 50471cfc902SMark Brown int ret = 0; 50571cfc902SMark Brown 50671cfc902SMark Brown setup = socdev->codec_data; 50771cfc902SMark Brown codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 50871cfc902SMark Brown if (codec == NULL) 50971cfc902SMark Brown return -ENOMEM; 51071cfc902SMark Brown 51171cfc902SMark Brown socdev->codec = codec; 51271cfc902SMark Brown mutex_init(&codec->mutex); 51371cfc902SMark Brown INIT_LIST_HEAD(&codec->dapm_widgets); 51471cfc902SMark Brown INIT_LIST_HEAD(&codec->dapm_paths); 51571cfc902SMark Brown 51671cfc902SMark Brown wm8728_socdev = socdev; 51771cfc902SMark Brown ret = -ENODEV; 51871cfc902SMark Brown 51971cfc902SMark Brown #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 52071cfc902SMark Brown if (setup->i2c_address) { 52171cfc902SMark Brown codec->hw_write = (hw_write_t)i2c_master_send; 52271cfc902SMark Brown ret = wm8728_add_i2c_device(pdev, setup); 52371cfc902SMark Brown } 52471cfc902SMark Brown #endif 52571cfc902SMark Brown #if defined(CONFIG_SPI_MASTER) 52671cfc902SMark Brown if (setup->spi) { 52771cfc902SMark Brown codec->hw_write = (hw_write_t)wm8728_spi_write; 52871cfc902SMark Brown ret = spi_register_driver(&wm8728_spi_driver); 52971cfc902SMark Brown if (ret != 0) 53071cfc902SMark Brown printk(KERN_ERR "can't add spi driver"); 53171cfc902SMark Brown } 53271cfc902SMark Brown #endif 53371cfc902SMark Brown 53471cfc902SMark Brown if (ret != 0) 53571cfc902SMark Brown kfree(codec); 53671cfc902SMark Brown 53771cfc902SMark Brown return ret; 53871cfc902SMark Brown } 53971cfc902SMark Brown 54071cfc902SMark Brown /* power down chip */ 54171cfc902SMark Brown static int wm8728_remove(struct platform_device *pdev) 54271cfc902SMark Brown { 54371cfc902SMark Brown struct snd_soc_device *socdev = platform_get_drvdata(pdev); 54471cfc902SMark Brown struct snd_soc_codec *codec = socdev->codec; 54571cfc902SMark Brown 54671cfc902SMark Brown if (codec->control_data) 54771cfc902SMark Brown wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); 54871cfc902SMark Brown 54971cfc902SMark Brown snd_soc_free_pcms(socdev); 55071cfc902SMark Brown snd_soc_dapm_free(socdev); 55171cfc902SMark Brown #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 55271cfc902SMark Brown i2c_unregister_device(codec->control_data); 55371cfc902SMark Brown i2c_del_driver(&wm8728_i2c_driver); 55471cfc902SMark Brown #endif 55571cfc902SMark Brown #if defined(CONFIG_SPI_MASTER) 55671cfc902SMark Brown spi_unregister_driver(&wm8728_spi_driver); 55771cfc902SMark Brown #endif 55871cfc902SMark Brown kfree(codec); 55971cfc902SMark Brown 56071cfc902SMark Brown return 0; 56171cfc902SMark Brown } 56271cfc902SMark Brown 56371cfc902SMark Brown struct snd_soc_codec_device soc_codec_dev_wm8728 = { 56471cfc902SMark Brown .probe = wm8728_probe, 56571cfc902SMark Brown .remove = wm8728_remove, 56671cfc902SMark Brown .suspend = wm8728_suspend, 56771cfc902SMark Brown .resume = wm8728_resume, 56871cfc902SMark Brown }; 56971cfc902SMark Brown EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728); 57071cfc902SMark Brown 571c9b3a40fSTakashi Iwai static int __init wm8728_modinit(void) 57264089b84SMark Brown { 57364089b84SMark Brown return snd_soc_register_dai(&wm8728_dai); 57464089b84SMark Brown } 57564089b84SMark Brown module_init(wm8728_modinit); 57664089b84SMark Brown 57764089b84SMark Brown static void __exit wm8728_exit(void) 57864089b84SMark Brown { 57964089b84SMark Brown snd_soc_unregister_dai(&wm8728_dai); 58064089b84SMark Brown } 58164089b84SMark Brown module_exit(wm8728_exit); 58264089b84SMark Brown 58371cfc902SMark Brown MODULE_DESCRIPTION("ASoC WM8728 driver"); 58471cfc902SMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 58571cfc902SMark Brown MODULE_LICENSE("GPL"); 586