diff options
Diffstat (limited to 'sound/soc/pxa/corgi.c')
| -rw-r--r-- | sound/soc/pxa/corgi.c | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/sound/soc/pxa/corgi.c b/sound/soc/pxa/corgi.c new file mode 100644 index 00000000..863367ad --- /dev/null +++ b/sound/soc/pxa/corgi.c @@ -0,0 +1,343 @@ +/* + * corgi.c -- SoC audio for Corgi + * + * Copyright 2005 Wolfson Microelectronics PLC. + * Copyright 2005 Openedhand Ltd. + * + * Authors: Liam Girdwood <lrg@slimlogic.co.uk> + * Richard Purdie <richard@openedhand.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/timer.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> + +#include <asm/mach-types.h> +#include <mach/corgi.h> +#include <mach/audio.h> + +#include "../codecs/wm8731.h" +#include "pxa2xx-i2s.h" + +#define CORGI_HP 0 +#define CORGI_MIC 1 +#define CORGI_LINE 2 +#define CORGI_HEADSET 3 +#define CORGI_HP_OFF 4 +#define CORGI_SPK_ON 0 +#define CORGI_SPK_OFF 1 + + /* audio clock in Hz - rounded from 12.235MHz */ +#define CORGI_AUDIO_CLOCK 12288000 + +static int corgi_jack_func; +static int corgi_spk_func; + +static void corgi_ext_control(struct snd_soc_dapm_context *dapm) +{ + /* set up jack connection */ + switch (corgi_jack_func) { + case CORGI_HP: + /* set = unmute headphone */ + gpio_set_value(CORGI_GPIO_MUTE_L, 1); + gpio_set_value(CORGI_GPIO_MUTE_R, 1); + snd_soc_dapm_disable_pin(dapm, "Mic Jack"); + snd_soc_dapm_disable_pin(dapm, "Line Jack"); + snd_soc_dapm_enable_pin(dapm, "Headphone Jack"); + snd_soc_dapm_disable_pin(dapm, "Headset Jack"); + break; + case CORGI_MIC: + /* reset = mute headphone */ + gpio_set_value(CORGI_GPIO_MUTE_L, 0); + gpio_set_value(CORGI_GPIO_MUTE_R, 0); + snd_soc_dapm_enable_pin(dapm, "Mic Jack"); + snd_soc_dapm_disable_pin(dapm, "Line Jack"); + snd_soc_dapm_disable_pin(dapm, "Headphone Jack"); + snd_soc_dapm_disable_pin(dapm, "Headset Jack"); + break; + case CORGI_LINE: + gpio_set_value(CORGI_GPIO_MUTE_L, 0); + gpio_set_value(CORGI_GPIO_MUTE_R, 0); + snd_soc_dapm_disable_pin(dapm, "Mic Jack"); + snd_soc_dapm_enable_pin(dapm, "Line Jack"); + snd_soc_dapm_disable_pin(dapm, "Headphone Jack"); + snd_soc_dapm_disable_pin(dapm, "Headset Jack"); + break; + case CORGI_HEADSET: + gpio_set_value(CORGI_GPIO_MUTE_L, 0); + gpio_set_value(CORGI_GPIO_MUTE_R, 1); + snd_soc_dapm_enable_pin(dapm, "Mic Jack"); + snd_soc_dapm_disable_pin(dapm, "Line Jack"); + snd_soc_dapm_disable_pin(dapm, "Headphone Jack"); + snd_soc_dapm_enable_pin(dapm, "Headset Jack"); + break; + } + + if (corgi_spk_func == CORGI_SPK_ON) + snd_soc_dapm_enable_pin(dapm, "Ext Spk"); + else + snd_soc_dapm_disable_pin(dapm, "Ext Spk"); + + /* signal a DAPM event */ + snd_soc_dapm_sync(dapm); +} + +static int corgi_startup(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_codec *codec = rtd->codec; + + mutex_lock(&codec->mutex); + + /* check the jack status at stream startup */ + corgi_ext_control(&codec->dapm); + + mutex_unlock(&codec->mutex); + + return 0; +} + +/* we need to unmute the HP at shutdown as the mute burns power on corgi */ +static void corgi_shutdown(struct snd_pcm_substream *substream) +{ + /* set = unmute headphone */ + gpio_set_value(CORGI_GPIO_MUTE_L, 1); + gpio_set_value(CORGI_GPIO_MUTE_R, 1); +} + +static int corgi_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *codec_dai = rtd->codec_dai; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + unsigned int clk = 0; + int ret = 0; + + switch (params_rate(params)) { + case 8000: + case 16000: + case 48000: + case 96000: + clk = 12288000; + break; + case 11025: + case 22050: + case 44100: + clk = 11289600; + break; + } + + /* set the codec system clock for DAC and ADC */ + ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk, + SND_SOC_CLOCK_IN); + if (ret < 0) + return ret; + + /* set the I2S system clock as input (unused) */ + ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0, + SND_SOC_CLOCK_IN); + if (ret < 0) + return ret; + + return 0; +} + +static struct snd_soc_ops corgi_ops = { + .startup = corgi_startup, + .hw_params = corgi_hw_params, + .shutdown = corgi_shutdown, +}; + +static int corgi_get_jack(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + ucontrol->value.integer.value[0] = corgi_jack_func; + return 0; +} + +static int corgi_set_jack(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + + if (corgi_jack_func == ucontrol->value.integer.value[0]) + return 0; + + corgi_jack_func = ucontrol->value.integer.value[0]; + corgi_ext_control(&card->dapm); + return 1; +} + +static int corgi_get_spk(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + ucontrol->value.integer.value[0] = corgi_spk_func; + return 0; +} + +static int corgi_set_spk(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + + if (corgi_spk_func == ucontrol->value.integer.value[0]) + return 0; + + corgi_spk_func = ucontrol->value.integer.value[0]; + corgi_ext_control(&card->dapm); + return 1; +} + +static int corgi_amp_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *k, int event) +{ + gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event)); + return 0; +} + +static int corgi_mic_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *k, int event) +{ + gpio_set_value(CORGI_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event)); + return 0; +} + +/* corgi machine dapm widgets */ +static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { +SND_SOC_DAPM_HP("Headphone Jack", NULL), +SND_SOC_DAPM_MIC("Mic Jack", corgi_mic_event), +SND_SOC_DAPM_SPK("Ext Spk", corgi_amp_event), +SND_SOC_DAPM_LINE("Line Jack", NULL), +SND_SOC_DAPM_HP("Headset Jack", NULL), +}; + +/* Corgi machine audio map (connections to the codec pins) */ +static const struct snd_soc_dapm_route corgi_audio_map[] = { + + /* headset Jack - in = micin, out = LHPOUT*/ + {"Headset Jack", NULL, "LHPOUT"}, + + /* headphone connected to LHPOUT1, RHPOUT1 */ + {"Headphone Jack", NULL, "LHPOUT"}, + {"Headphone Jack", NULL, "RHPOUT"}, + + /* speaker connected to LOUT, ROUT */ + {"Ext Spk", NULL, "ROUT"}, + {"Ext Spk", NULL, "LOUT"}, + + /* mic is connected to MICIN (via right channel of headphone jack) */ + {"MICIN", NULL, "Mic Jack"}, + + /* Same as the above but no mic bias for line signals */ + {"MICIN", NULL, "Line Jack"}, +}; + +static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset", + "Off"}; +static const char *spk_function[] = {"On", "Off"}; +static const struct soc_enum corgi_enum[] = { + SOC_ENUM_SINGLE_EXT(5, jack_function), + SOC_ENUM_SINGLE_EXT(2, spk_function), +}; + +static const struct snd_kcontrol_new wm8731_corgi_controls[] = { + SOC_ENUM_EXT("Jack Function", corgi_enum[0], corgi_get_jack, + corgi_set_jack), + SOC_ENUM_EXT("Speaker Function", corgi_enum[1], corgi_get_spk, + corgi_set_spk), +}; + +/* + * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device + */ +static int corgi_wm8731_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_codec *codec = rtd->codec; + struct snd_soc_dapm_context *dapm = &codec->dapm; + + snd_soc_dapm_nc_pin(dapm, "LLINEIN"); + snd_soc_dapm_nc_pin(dapm, "RLINEIN"); + + return 0; +} + +/* corgi digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link corgi_dai = { + .name = "WM8731", + .stream_name = "WM8731", + .cpu_dai_name = "pxa2xx-i2s", + .codec_dai_name = "wm8731-hifi", + .platform_name = "pxa-pcm-audio", + .codec_name = "wm8731.0-001b", + .init = corgi_wm8731_init, + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, + .ops = &corgi_ops, +}; + +/* corgi audio machine driver */ +static struct snd_soc_card corgi = { + .name = "Corgi", + .owner = THIS_MODULE, + .dai_link = &corgi_dai, + .num_links = 1, + + .controls = wm8731_corgi_controls, + .num_controls = ARRAY_SIZE(wm8731_corgi_controls), + .dapm_widgets = wm8731_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), + .dapm_routes = corgi_audio_map, + .num_dapm_routes = ARRAY_SIZE(corgi_audio_map), +}; + +static int __devinit corgi_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &corgi; + int ret; + + card->dev = &pdev->dev; + + ret = snd_soc_register_card(card); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", + ret); + return ret; +} + +static int __devexit corgi_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + snd_soc_unregister_card(card); + return 0; +} + +static struct platform_driver corgi_driver = { + .driver = { + .name = "corgi-audio", + .owner = THIS_MODULE, + }, + .probe = corgi_probe, + .remove = __devexit_p(corgi_remove), +}; + +module_platform_driver(corgi_driver); + +/* Module information */ +MODULE_AUTHOR("Richard Purdie"); +MODULE_DESCRIPTION("ALSA SoC Corgi"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:corgi-audio"); |