/* * wm8741.c -- WM8741 ALSA SoC Audio driver * * Copyright 2010 Wolfson Microelectronics plc * * Author: Ian Lartey * * * 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 #include #include #include "wm8741.h" static struct snd_soc_codec *wm8741_codec; struct snd_soc_codec_device soc_codec_dev_wm8741; #define WM8741_NUM_SUPPLIES 2 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = { "AVDD", "DVDD", }; #define WM8741_NUM_RATES 4 /* codec private data */ struct wm8741_priv { struct snd_soc_codec codec; u16 reg_cache[WM8741_REGISTER_COUNT]; struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES]; unsigned int sysclk; unsigned int rate_constraint_list[WM8741_NUM_RATES]; struct snd_pcm_hw_constraint_list rate_constraint; }; static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = { 0x0000, /* R0 - DACLLSB Attenuation */ 0x0000, /* R1 - DACLMSB Attenuation */ 0x0000, /* R2 - DACRLSB Attenuation */ 0x0000, /* R3 - DACRMSB Attenuation */ 0x0000, /* R4 - Volume Control */ 0x000A, /* R5 - Format Control */ 0x0000, /* R6 - Filter Control */ 0x0000, /* R7 - Mode Control 1 */ 0x0002, /* R8 - Mode Control 2 */ 0x0000, /* R9 - Reset */ 0x0002, /* R32 - ADDITONAL_CONTROL_1 */ }; static int wm8741_reset(struct snd_soc_codec *codec) { return snd_soc_write(codec, WM8741_RESET, 0); } static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0); static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0); static const struct snd_kcontrol_new wm8741_snd_controls[] = { SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine), SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv), }; static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = { SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_OUTPUT("VOUTLP"), SND_SOC_DAPM_OUTPUT("VOUTLN"), SND_SOC_DAPM_OUTPUT("VOUTRP"), SND_SOC_DAPM_OUTPUT("VOUTRN"), }; static const struct snd_soc_dapm_route intercon[] = { { "VOUTLP", NULL, "DACL" }, { "VOUTLN", NULL, "DACL" }, { "VOUTRP", NULL, "DACR" }, { "VOUTRN", NULL, "DACR" }, }; static int wm8741_add_widgets(struct snd_soc_codec *codec) { snd_soc_dapm_new_controls(codec, wm8741_dapm_widgets, ARRAY_SIZE(wm8741_dapm_widgets)); snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); return 0; } static struct { int value; int ratio; } lrclk_ratios[WM8741_NUM_RATES] = { { 1, 256 }, { 2, 384 }, { 3, 512 }, { 4, 768 }, }; static int wm8741_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); /* The set of sample rates that can be supported depends on the * MCLK supplied to the CODEC - enforce this. */ if (!wm8741->sysclk) { dev_err(codec->dev, "No MCLK configured, call set_sysclk() on init\n"); return -EINVAL; } snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &wm8741->rate_constraint); return 0; } static int wm8741_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_codec *codec = socdev->card->codec; struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC; int i; /* Find a supported LRCLK ratio */ for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { if (wm8741->sysclk / params_rate(params) == lrclk_ratios[i].ratio) break; } /* Should never happen, should be handled by constraints */ if (i == ARRAY_SIZE(lrclk_ratios)) { dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", wm8741->sysclk / params_rate(params)); return -EINVAL; } /* bit size */ switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: break; case SNDRV_PCM_FORMAT_S20_3LE: iface |= 0x0001; break; case SNDRV_PCM_FORMAT_S24_LE: iface |= 0x0002; break; case SNDRV_PCM_FORMAT_S32_LE: iface |= 0x0003; break; default: dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d", params_format(params)); return -EINVAL; } dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d", params_format(params)); snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface); return 0; } static int wm8741_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 wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); unsigned int val; int i; dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq); wm8741->sysclk = freq; wm8741->rate_constraint.count = 0; for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { dev_dbg(codec->dev, "index = %d, ratio = %d, freq = %d", i, lrclk_ratios[i].ratio, freq); val = freq / lrclk_ratios[i].ratio; /* Check that it's a standard rate since core can't * cope with others and having the odd rates confuses * constraint matching. */ switch (val) { case 32000: case 44100: case 48000: case 64000: case 88200: case 96000: dev_dbg(codec->dev, "Supported sample rate: %dHz\n", val); wm8741->rate_constraint_list[i] = val; wm8741->rate_constraint.count++; break; default: dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", val); } } /* Need at least one supported rate... */ if (wm8741->rate_constraint.count == 0) return -EINVAL; return 0; } static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { struct snd_soc_codec *codec = codec_dai->codec; u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3; /* check master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 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 |= 0x0008; break; case SND_SOC_DAIFMT_RIGHT_J: break; case SND_SOC_DAIFMT_LEFT_J: iface |= 0x0004; 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 |= 0x0010; break; case SND_SOC_DAIFMT_IB_NF: iface |= 0x0020; break; case SND_SOC_DAIFMT_NB_IF: iface |= 0x0030; break; default: return -EINVAL; } dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n", fmt & SND_SOC_DAIFMT_FORMAT_MASK, ((fmt & SND_SOC_DAIFMT_INV_MASK))); snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface); return 0; } #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \ SNDRV_PCM_RATE_192000) #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) static struct snd_soc_dai_ops wm8741_dai_ops = { .startup = wm8741_startup, .hw_params = wm8741_hw_params, .set_sysclk = wm8741_set_dai_sysclk, .set_fmt = wm8741_set_dai_fmt, }; struct snd_soc_dai wm8741_dai = { .name = "WM8741", .playback = { .stream_name = "Playback", .channels_min = 2, /* Mono modes not yet supported */ .channels_max = 2, .rates = WM8741_RATES, .formats = WM8741_FORMATS, }, .ops = &wm8741_dai_ops, }; EXPORT_SYMBOL_GPL(wm8741_dai); #ifdef CONFIG_PM static int wm8741_resume(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec = socdev->card->codec; u16 *cache = codec->reg_cache; int i; /* RESTORE REG Cache */ for (i = 0; i < WM8741_REGISTER_COUNT; i++) { if (cache[i] == wm8741_reg_defaults[i] || WM8741_RESET == i) continue; snd_soc_write(codec, i, cache[i]); } return 0; } #else #define wm8741_suspend NULL #define wm8741_resume NULL #endif static int wm8741_probe(struct platform_device *pdev) { struct snd_soc_device *socdev = platform_get_drvdata(pdev); struct snd_soc_codec *codec; int ret = 0; if (wm8741_codec == NULL) { dev_err(&pdev->dev, "Codec device not registered\n"); return -ENODEV; } socdev->card->codec = wm8741_codec; codec = wm8741_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, wm8741_snd_controls, ARRAY_SIZE(wm8741_snd_controls)); wm8741_add_widgets(codec); return ret; pcm_err: return ret; } static int wm8741_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_wm8741 = { .probe = wm8741_probe, .remove = wm8741_remove, .resume = wm8741_resume, }; EXPORT_SYMBOL_GPL(soc_codec_dev_wm8741); static int wm8741_register(struct wm8741_priv *wm8741, enum snd_soc_control_type control) { int ret; struct snd_soc_codec *codec = &wm8741->codec; int i; if (wm8741_codec) { dev_err(codec->dev, "Another WM8741 is registered\n"); return -EINVAL; } mutex_init(&codec->mutex); INIT_LIST_HEAD(&codec->dapm_widgets); INIT_LIST_HEAD(&codec->dapm_paths); snd_soc_codec_set_drvdata(codec, wm8741); codec->name = "WM8741"; codec->owner = THIS_MODULE; codec->bias_level = SND_SOC_BIAS_OFF; codec->set_bias_level = NULL; codec->dai = &wm8741_dai; codec->num_dai = 1; codec->reg_cache_size = WM8741_REGISTER_COUNT; codec->reg_cache = &wm8741->reg_cache; wm8741->rate_constraint.list = &wm8741->rate_constraint_list[0]; wm8741->rate_constraint.count = ARRAY_SIZE(wm8741->rate_constraint_list); memcpy(codec->reg_cache, wm8741_reg_defaults, sizeof(wm8741->reg_cache)); ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); if (ret != 0) { dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); goto err; } for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) wm8741->supplies[i].supply = wm8741_supply_names[i]; ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8741->supplies), wm8741->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to request supplies: %d\n", ret); goto err; } ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); if (ret != 0) { dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); goto err_get; } ret = wm8741_reset(codec); if (ret < 0) { dev_err(codec->dev, "Failed to issue reset\n"); goto err_enable; } wm8741_dai.dev = codec->dev; /* Change some default settings - latch VU */ wm8741->reg_cache[WM8741_DACLLSB_ATTENUATION] |= WM8741_UPDATELL; wm8741->reg_cache[WM8741_DACLMSB_ATTENUATION] |= WM8741_UPDATELM; wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] |= WM8741_UPDATERL; wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] |= WM8741_UPDATERM; wm8741_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(&wm8741_dai); if (ret != 0) { dev_err(codec->dev, "Failed to register DAI: %d\n", ret); snd_soc_unregister_codec(codec); return ret; } dev_dbg(codec->dev, "Successful registration\n"); return 0; err_enable: regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); err_get: regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); err: kfree(wm8741); return ret; } static void wm8741_unregister(struct wm8741_priv *wm8741) { regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); snd_soc_unregister_dai(&wm8741_dai); snd_soc_unregister_codec(&wm8741->codec); kfree(wm8741); wm8741_codec = NULL; } #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) static __devinit int wm8741_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm8741_priv *wm8741; struct snd_soc_codec *codec; wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL); if (wm8741 == NULL) return -ENOMEM; codec = &wm8741->codec; codec->hw_write = (hw_write_t)i2c_master_send; i2c_set_clientdata(i2c, wm8741); codec->control_data = i2c; codec->dev = &i2c->dev; return wm8741_register(wm8741, SND_SOC_I2C); } static __devexit int wm8741_i2c_remove(struct i2c_client *client) { struct wm8741_priv *wm8741 = i2c_get_clientdata(client); wm8741_unregister(wm8741); return 0; } static const struct i2c_device_id wm8741_i2c_id[] = { { "wm8741", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id); static struct i2c_driver wm8741_i2c_driver = { .driver = { .name = "WM8741", .owner = THIS_MODULE, }, .probe = wm8741_i2c_probe, .remove = __devexit_p(wm8741_i2c_remove), .id_table = wm8741_i2c_id, }; #endif static int __init wm8741_modinit(void) { int ret; #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) ret = i2c_add_driver(&wm8741_i2c_driver); if (ret != 0) { printk(KERN_ERR "Failed to register WM8741 I2C driver: %d\n", ret); } #endif return 0; } module_init(wm8741_modinit); static void __exit wm8741_exit(void) { #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) i2c_del_driver(&wm8741_i2c_driver); #endif } module_exit(wm8741_exit); MODULE_DESCRIPTION("ASoC WM8741 driver"); MODULE_AUTHOR("Ian Lartey "); MODULE_LICENSE("GPL");