/* * wm8711.c -- WM8711 ALSA SoC Audio driver * * Copyright 2006 Wolfson Microelectronics * * Author: Mike Arthur * * Based on wm8731.c by Richard Purdie * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8711.h" static struct snd_soc_codec *wm8711_codec; /* codec private data */ struct wm8711_priv { struct snd_soc_codec codec; u16 reg_cache[WM8711_CACHEREGNUM]; unsigned int sysclk; }; /* * wm8711 register cache * We can't read the WM8711 register space when we are * using 2 wire for device control, so we cache them instead. * There is no point in caching the reset register */ static const u16 wm8711_reg[WM8711_CACHEREGNUM] = { 0x0079, 0x0079, 0x000a, 0x0008, 0x009f, 0x000a, 0x0000, 0x0000 }; /* * read wm8711 register cache */ static inline unsigned int wm8711_read_reg_cache(struct snd_soc_codec *codec, unsigned int reg) { u16 *cache = codec->reg_cache; if (reg == WM8711_RESET) return 0; if (reg >= WM8711_CACHEREGNUM) return -1; return cache[reg]; } /* * write wm8711 register cache */ static inline void wm8711_write_reg_cache(struct snd_soc_codec *codec, u16 reg, unsigned int value) { u16 *cache = codec->reg_cache; if (reg >= WM8711_CACHEREGNUM) return; cache[reg] = value; } /* * write to the WM8711 register space */ static int wm8711_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { u8 data[2]; /* data is * D15..D9 WM8753 register offset * D8...D0 register data */ data[0] = (reg << 1) | ((value >> 8) & 0x0001); data[1] = value & 0x00ff; wm8711_write_reg_cache(codec, reg, value); if (codec->hw_write(codec->control_data, data, 2) == 2) return 0; else return -EIO; } #define wm8711_reset(c) wm8711_write(c, WM8711_RESET, 0) static const struct snd_kcontrol_new wm8711_snd_controls[] = { SOC_DOUBLE_R("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V, 0, 127, 0), SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V, 7, 1, 0), }; /* add non dapm controls */ static int wm8711_add_controls(struct snd_soc_codec *codec) { int err, i; for (i = 0; i < ARRAY_SIZE(wm8711_snd_controls); i++) { err = snd_ctl_add(codec->card, snd_soc_cnew(&wm8711_snd_controls[i], codec, NULL)); if (err < 0) return err; } return 0; } /* Output Mixer */ static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = { SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0), SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0), }; static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = { SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1, &wm8711_output_mixer_controls[0], ARRAY_SIZE(wm8711_output_mixer_controls)), SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1), SND_SOC_DAPM_OUTPUT("LOUT"), SND_SOC_DAPM_OUTPUT("LHPOUT"), SND_SOC_DAPM_OUTPUT("ROUT"), SND_SOC_DAPM_OUTPUT("RHPOUT"), }; static const struct snd_soc_dapm_route intercon[] = { /* output mixer */ {"Output Mixer", "Line Bypass Switch", "Line Input"}, {"Output Mixer", "HiFi Playback Switch", "DAC"}, /* outputs */ {"RHPOUT", NULL, "Output Mixer"}, {"ROUT", NULL, "Output Mixer"}, {"LHPOUT", NULL, "Output Mixer"}, {"LOUT", NULL, "Output Mixer"}, }; static int wm8711_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, wm8711_dapm_widgets, ARRAY_SIZE(wm8711_dapm_widgets)); snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); snd_soc_dapm_new_widgets(codec); return 0; } struct _coeff_div { u32 mclk; u32 rate; u16 fs; u8 sr:4; u8 bosr:1; u8 usb:1; }; /* codec mclk clock divider coefficients */ static const struct _coeff_div coeff_div[] = { /* 48k */ {12288000, 48000, 256, 0x0, 0x0, 0x0}, {18432000, 48000, 384, 0x0, 0x1, 0x0}, {12000000, 48000, 250, 0x0, 0x0, 0x1}, /* 32k */ {12288000, 32000, 384, 0x6, 0x0, 0x0}, {18432000, 32000, 576, 0x6, 0x1, 0x0}, {12000000, 32000, 375, 0x6, 0x0, 0x1}, /* 8k */ {12288000, 8000, 1536, 0x3, 0x0, 0x0}, {18432000, 8000, 2304, 0x3, 0x1, 0x0}, {11289600, 8000, 1408, 0xb, 0x0, 0x0}, {16934400, 8000, 2112, 0xb, 0x1, 0x0}, {12000000, 8000, 1500, 0x3, 0x0, 0x1}, /* 96k */ {12288000, 96000, 128, 0x7, 0x0, 0x0}, {18432000, 96000, 192, 0x7, 0x1, 0x0}, {12000000, 96000, 125, 0x7, 0x0, 0x1}, /* 44.1k */ {11289600, 44100, 256, 0x8, 0x0, 0x0}, {16934400, 44100, 384, 0x8, 0x1, 0x0}, {12000000, 44100, 272, 0x8, 0x1, 0x1}, /* 88.2k */ {11289600, 88200, 128, 0xf, 0x0, 0x0}, {16934400, 88200, 192, 0xf, 0x1, 0x0}, {12000000, 88200, 136, 0xf, 0x1, 0x1}, }; static inline int get_coeff(int mclk, int rate) { int i; for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) return i; } return 0; } static int wm8711_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; struct wm8711_priv *wm8711 = codec->private_data; u16 iface = wm8711_read_reg_cache(codec, WM8711_IFACE) & 0xfffc; int i = get_coeff(wm8711->sysclk, params_rate(params)); u16 srate = (coeff_div[i].sr << 2) | (coeff_div[i].bosr << 1) | coeff_div[i].usb; wm8711_write(codec, WM8711_SRATE, srate); /* bit size */ switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: iface |= 0x0004; break; case SNDRV_PCM_FORMAT_S24_LE: iface |= 0x0008; break; } wm8711_write(codec, WM8711_IFACE, iface); return 0; } static int wm8711_pcm_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; /* set active */ wm8711_write(codec, WM8711_ACTIVE, 0x0001); return 0; } static void wm8711_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; /* deactivate */ if (!codec->active) { udelay(50); wm8711_write(codec, WM8711_ACTIVE, 0x0); } } static int wm8711_mute(struct snd_soc_dai *dai, int mute) { struct snd_soc_codec *codec = dai->codec; u16 mute_reg = wm8711_read_reg_cache(codec, WM8711_APDIGI) & 0xfff7; if (mute) wm8711_write(codec, WM8711_APDIGI, mute_reg | 0x8); else wm8711_write(codec, WM8711_APDIGI, mute_reg); return 0; } static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = codec_dai->codec; struct wm8711_priv *wm8711 = codec->private_data; switch (freq) { case 11289600: case 12000000: case 12288000: case 16934400: case 18432000: wm8711->sysclk = freq; return 0; } return -EINVAL; } static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 iface = 0; /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: iface |= 0x0040; break; case SND_SOC_DAIFMT_CBS_CFS: break; default: return -EINVAL; } /* interface format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: iface |= 0x0002; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: iface |= 0x0001; break; case SND_SOC_DAIFMT_DSP_A: iface |= 0x0003; break; case SND_SOC_DAIFMT_DSP_B: iface |= 0x0013; break; default: return -EINVAL; } /* clock inversion */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_NF: break; case SND_SOC_DAIFMT_IB_IF: iface |= 0x0090; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x0080; break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x0010; break; default: return -EINVAL; } /* set iface */ wm8711_write(codec, WM8711_IFACE, iface); return 0; } static int wm8711_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { u16 reg = wm8711_read_reg_cache(codec, WM8711_PWR) & 0xff7f; switch (level) { case SND_SOC_BIAS_ON: wm8711_write(codec, WM8711_PWR, reg); break; case SND_SOC_BIAS_PREPARE: break; case SND_SOC_BIAS_STANDBY: wm8711_write(codec, WM8711_PWR, reg | 0x0040); break; case SND_SOC_BIAS_OFF: wm8711_write(codec, WM8711_ACTIVE, 0x0); wm8711_write(codec, WM8711_PWR, 0xffff); break; } codec->bias_level = level; return 0; } #define WM8711_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\ SNDRV_PCM_RATE_96000) #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE) static struct snd_soc_dai_ops wm8711_ops = { .prepare = wm8711_pcm_prepare, .hw_params = wm8711_hw_params, .shutdown = wm8711_shutdown, .digital_mute = wm8711_mute, .set_sysclk = wm8711_set_dai_sysclk, .set_fmt = wm8711_set_dai_fmt, }; struct snd_soc_dai wm8711_dai = { .name = "WM8711", .playback = { .stream_name = "Playback", .channels_min = 1, .channels_max = 2, .rates = WM8711_RATES, .formats = WM8711_FORMATS,}, .ops = &wm8711_ops, }; EXPORT_SYMBOL_GPL(wm8711_dai); static int wm8711_suspend(struct platform_device *pdev, pm_message_t state) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; wm8711_write(codec, WM8711_ACTIVE, 0x0); wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF); return 0; } static int wm8711_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; int i; u8 data[2]; u16 *cache = codec->reg_cache; /* Sync reg_cache with the hardware */ for (i = 0; i < ARRAY_SIZE(wm8711_reg); i++) { data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); data[1] = cache[i] & 0x00ff; codec->hw_write(codec->control_data, data, 2); } wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY); wm8711_set_bias_level(codec, codec->suspend_bias_level); return 0; } static int wm8711_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec; int ret = 0; if (wm8711_codec == NULL) { dev_err(&pdev->dev, "Codec device not registered\n"); return -ENODEV; } socdev->card->codec = wm8711_codec; codec = wm8711_codec; /* register pcms */ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); if (ret < 0) { dev_err(codec->dev, "failed to create pcms: %d\n", ret); goto pcm_err; } snd_soc_add_controls(codec, wm8711_snd_controls, ARRAY_SIZE(wm8711_snd_controls)); wm8711_add_widgets(codec); ret = snd_soc_init_card(socdev); if (ret < 0) { dev_err(codec->dev, "failed to register card: %d\n", ret); goto card_err; } return ret; card_err: snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); pcm_err: return ret; } /* power down chip */ static int wm8711_remove(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); snd_soc_free_pcms(socdev); snd_soc_dapm_free(socdev); return 0; } struct snd_soc_codec_device soc_codec_dev_wm8711 = { .probe = wm8711_probe, .remove = wm8711_remove, .suspend = wm8711_suspend, .resume = wm8711_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8711); static int wm8711_register(struct wm8711_priv *wm8711) { int ret; struct snd_soc_codec *codec = &wm8711->codec; u16 reg; if (wm8711_codec) { dev_err(codec->dev, "Another WM8711 is registered\n"); return -EINVAL; } mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); codec->private_data = wm8711; codec->name = "WM8711"; codec->owner = THIS_MODULE; codec->read = wm8711_read_reg_cache; codec->write = wm8711_write; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = wm8711_set_bias_level; codec->dai = &wm8711_dai; codec->num_dai = 1; codec->reg_cache_size = WM8711_CACHEREGNUM; codec->reg_cache = &wm8711->reg_cache; memcpy(codec->reg_cache, wm8711_reg, sizeof(wm8711_reg)); ret = wm8711_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset\n"); return ret; } wm8711_dai.dev = codec->dev; wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY); /* Latch the update bits */ reg = wm8711_read_reg_cache(codec, WM8711_LOUT1V); wm8711_write(codec, WM8711_LOUT1V, reg | 0x0100); reg = wm8711_read_reg_cache(codec, WM8711_ROUT1V); wm8711_write(codec, WM8711_ROUT1V, reg | 0x0100); wm8711_codec = codec; ret = snd_soc_register_codec(codec); if (ret != 0) { dev_err(codec->dev, "Failed to register codec: %d\n", ret); return ret; } ret = snd_soc_register_dai(&wm8711_dai); if (ret != 0) { dev_err(codec->dev, "Failed to register DAI: %d\n", ret); snd_soc_unregister_codec(codec); return ret; } return 0; } static void wm8711_unregister(struct wm8711_priv *wm8711) { wm8711_set_bias_level(&wm8711->codec, SND_SOC_BIAS_OFF); snd_soc_unregister_dai(&wm8711_dai); snd_soc_unregister_codec(&wm8711->codec); kfree(wm8711); wm8711_codec = NULL; } #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) static __devinit int wm8711_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8711_priv *wm8711; struct snd_soc_codec *codec; wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL); if (wm8711 == NULL) return -ENOMEM; codec = &wm8711->codec; codec->hw_write = (hw_write_t)i2c_master_send; i2c_set_clientdata(i2c, wm8711); codec->control_data = i2c; codec->dev = &i2c->dev; return wm8711_register(wm8711); } static __devexit int wm8711_i2c_remove(struct i2c_client *client) { struct wm8711_priv *wm8711 = i2c_get_clientdata(client); wm8711_unregister(wm8711); return 0; } static const struct i2c_device_id wm8711_i2c_id[] = { { "wm8711", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id); static struct i2c_driver wm8711_i2c_driver = { .driver = { .name = "WM8711 I2C Codec", .owner = THIS_MODULE, }, .probe = wm8711_i2c_probe, .remove = __devexit_p(wm8711_i2c_remove), .id_table = wm8711_i2c_id, }; #endif static int __init wm8711_modinit(void) { int ret; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) ret = i2c_add_driver(&wm8711_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n", ret); } #endif return 0; } module_init(wm8711_modinit); static void __exit wm8711_exit(void) { #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) i2c_del_driver(&wm8711_i2c_driver); #endif } module_exit(wm8711_exit); MODULE_DESCRIPTION("ASoC WM8711 driver"); MODULE_AUTHOR("Mike Arthur"); MODULE_LICENSE("GPL");