ASoC: machine support for Toshiba e740 PDA

This patch provides suupport for the wm9705 AC97 codec on the Toshiba e740.

Note:
The e740 has a hard headphone switch that turns the speaker off and is not
software detectable or controlable. Also both headphone and speaker amps
share a common output enable.

Signed-off-by: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

arch/arm/mach-pxa/e740.c

@@ -135,6 +135,11 @@ static unsigned long e740_pin_config[] __initdata = {
 	/* IrDA */
 	GPIO38_GPIO | MFP_LPM_DRIVE_HIGH,
 
+	/* Audio power control */
+	GPIO16_GPIO,  /* AC97 codec AVDD2 supply (analogue power) */
+	GPIO40_GPIO,  /* Mic amp power */
+	GPIO41_GPIO,  /* Headphone amp power */
+
 	/* PC Card */
 	GPIO8_GPIO,   /* CD0 */
 	GPIO44_GPIO,  /* CD1 */

arch/arm/mach-pxa/include/mach/eseries-gpio.h

@@ -45,6 +45,11 @@
 /* e7xx IrDA power control */
 #define GPIO_E7XX_IR_OFF         38
 
+/* e740 audio control GPIOs */
+#define GPIO_E740_WM9705_nAVDD2  16
+#define GPIO_E740_MIC_ON         40
+#define GPIO_E740_AMP_ON         41
+
 /* e750 audio control GPIOs */
 #define GPIO_E750_HP_AMP_OFF      4
 #define GPIO_E750_SPK_AMP_OFF     7

sound/soc/pxa/Kconfig

@@ -61,6 +61,15 @@ config SND_PXA2XX_SOC_TOSA
 	  Say Y if you want to add support for SoC audio on Sharp
 	  Zaurus SL-C6000x models (Tosa).
 
+config SND_PXA2XX_SOC_E740
+	tristate "SoC AC97 Audio support for e740"
+	depends on SND_PXA2XX_SOC && MACH_E740
+	select SND_SOC_WM9705
+	select SND_PXA2XX_SOC_AC97
+	help
+	  Say Y if you want to add support for SoC audio on the
+	  toshiba e740 PDA
+
 config SND_PXA2XX_SOC_E750
 	tristate "SoC AC97 Audio support for e750"
 	depends on SND_PXA2XX_SOC && MACH_E750

sound/soc/pxa/Makefile

@@ -13,6 +13,7 @@ obj-$(CONFIG_SND_PXA_SOC_SSP) += snd-soc-pxa-ssp.o
 snd-soc-corgi-objs := corgi.o
 snd-soc-poodle-objs := poodle.o
 snd-soc-tosa-objs := tosa.o
+snd-soc-e740-objs := e740_wm9705.o
 snd-soc-e750-objs := e750_wm9705.o
 snd-soc-e800-objs := e800_wm9712.o
 snd-soc-spitz-objs := spitz.o
@@ -23,6 +24,7 @@ snd-soc-zylonite-objs := zylonite.o
 obj-$(CONFIG_SND_PXA2XX_SOC_CORGI) += snd-soc-corgi.o
 obj-$(CONFIG_SND_PXA2XX_SOC_POODLE) += snd-soc-poodle.o
 obj-$(CONFIG_SND_PXA2XX_SOC_TOSA) += snd-soc-tosa.o
+obj-$(CONFIG_SND_PXA2XX_SOC_E740) += snd-soc-e740.o
 obj-$(CONFIG_SND_PXA2XX_SOC_E750) += snd-soc-e750.o
 obj-$(CONFIG_SND_PXA2XX_SOC_E800) += snd-soc-e800.o
 obj-$(CONFIG_SND_PXA2XX_SOC_SPITZ) += snd-soc-spitz.o

sound/soc/pxa/e740_wm9705.c

@@ -0,0 +1,213 @@
+/*
+ * e740-wm9705.c  --  SoC audio for e740
+ *
+ * Copyright 2007 (c) Ian Molton <spyro@f2s.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; version 2 ONLY.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/gpio.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <mach/pxa-regs.h>
+#include <mach/hardware.h>
+#include <mach/audio.h>
+#include <mach/eseries-gpio.h>
+
+#include <asm/mach-types.h>
+
+#include "../codecs/wm9705.h"
+#include "pxa2xx-pcm.h"
+#include "pxa2xx-ac97.h"
+
+
+#define E740_AUDIO_OUT 1
+#define E740_AUDIO_IN  2
+
+static int e740_audio_power;
+
+static void e740_sync_audio_power(int status)
+{
+	gpio_set_value(GPIO_E740_WM9705_nAVDD2, !status);
+	gpio_set_value(GPIO_E740_AMP_ON, (status & E740_AUDIO_OUT) ? 1 : 0);
+	gpio_set_value(GPIO_E740_MIC_ON, (status & E740_AUDIO_IN) ? 1 : 0);
+}
+
+static int e740_mic_amp_event(struct snd_soc_dapm_widget *w,
+				struct snd_kcontrol *kcontrol, int event)
+{
+	if (event & SND_SOC_DAPM_PRE_PMU)
+		e740_audio_power |= E740_AUDIO_IN;
+	else if (event & SND_SOC_DAPM_POST_PMD)
+		e740_audio_power &= ~E740_AUDIO_IN;
+
+	e740_sync_audio_power(e740_audio_power);
+
+	return 0;
+}
+
+static int e740_output_amp_event(struct snd_soc_dapm_widget *w,
+				struct snd_kcontrol *kcontrol, int event)
+{
+	if (event & SND_SOC_DAPM_PRE_PMU)
+		e740_audio_power |= E740_AUDIO_OUT;
+	else if (event & SND_SOC_DAPM_POST_PMD)
+		e740_audio_power &= ~E740_AUDIO_OUT;
+
+	e740_sync_audio_power(e740_audio_power);
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget e740_dapm_widgets[] = {
+	SND_SOC_DAPM_HP("Headphone Jack", NULL),
+	SND_SOC_DAPM_SPK("Speaker", NULL),
+	SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
+	SND_SOC_DAPM_PGA_E("Output Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
+			e740_output_amp_event, SND_SOC_DAPM_PRE_PMU |
+			SND_SOC_DAPM_POST_PMD),
+	SND_SOC_DAPM_PGA_E("Mic Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
+			e740_mic_amp_event, SND_SOC_DAPM_PRE_PMU |
+			SND_SOC_DAPM_POST_PMD),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	{"Output Amp", NULL, "LOUT"},
+	{"Output Amp", NULL, "ROUT"},
+	{"Output Amp", NULL, "MONOOUT"},
+
+	{"Speaker", NULL, "Output Amp"},
+	{"Headphone Jack", NULL, "Output Amp"},
+
+	{"MIC1", NULL, "Mic Amp"},
+	{"Mic Amp", NULL, "Mic (Internal)"},
+};
+
+static int e740_ac97_init(struct snd_soc_codec *codec)
+{
+	snd_soc_dapm_nc_pin(codec, "HPOUTL");
+	snd_soc_dapm_nc_pin(codec, "HPOUTR");
+	snd_soc_dapm_nc_pin(codec, "PHONE");
+	snd_soc_dapm_nc_pin(codec, "LINEINL");
+	snd_soc_dapm_nc_pin(codec, "LINEINR");
+	snd_soc_dapm_nc_pin(codec, "CDINL");
+	snd_soc_dapm_nc_pin(codec, "CDINR");
+	snd_soc_dapm_nc_pin(codec, "PCBEEP");
+	snd_soc_dapm_nc_pin(codec, "MIC2");
+
+	snd_soc_dapm_new_controls(codec, e740_dapm_widgets,
+					ARRAY_SIZE(e740_dapm_widgets));
+
+	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+
+	snd_soc_dapm_sync(codec);
+
+	return 0;
+}
+
+static struct snd_soc_dai_link e740_dai[] = {
+	{
+		.name = "AC97",
+		.stream_name = "AC97 HiFi",
+		.cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
+		.codec_dai = &wm9705_dai[WM9705_DAI_AC97_HIFI],
+		.init = e740_ac97_init,
+	},
+	{
+		.name = "AC97 Aux",
+		.stream_name = "AC97 Aux",
+		.cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
+		.codec_dai = &wm9705_dai[WM9705_DAI_AC97_AUX],
+	},
+};
+
+static struct snd_soc_card e740 = {
+	.name = "Toshiba e740",
+	.platform = &pxa2xx_soc_platform,
+	.dai_link = e740_dai,
+	.num_links = ARRAY_SIZE(e740_dai),
+};
+
+static struct snd_soc_device e740_snd_devdata = {
+	.card = &e740,
+	.codec_dev = &soc_codec_dev_wm9705,
+};
+
+static struct platform_device *e740_snd_device;
+
+static int __init e740_init(void)
+{
+	int ret;
+
+	if (!machine_is_e740())
+		return -ENODEV;
+
+	ret = gpio_request(GPIO_E740_MIC_ON,  "Mic amp");
+	if (ret)
+		return ret;
+
+	ret = gpio_request(GPIO_E740_AMP_ON, "Output amp");
+	if (ret)
+		goto free_mic_amp_gpio;
+
+	ret = gpio_request(GPIO_E740_WM9705_nAVDD2, "Audio power");
+	if (ret)
+		goto free_op_amp_gpio;
+
+	/* Disable audio */
+	ret = gpio_direction_output(GPIO_E740_MIC_ON, 0);
+	if (ret)
+		goto free_apwr_gpio;
+	ret = gpio_direction_output(GPIO_E740_AMP_ON, 0);
+	if (ret)
+		goto free_apwr_gpio;
+	ret = gpio_direction_output(GPIO_E740_WM9705_nAVDD2, 1);
+	if (ret)
+		goto free_apwr_gpio;
+
+	e740_snd_device = platform_device_alloc("soc-audio", -1);
+	if (!e740_snd_device) {
+		ret = -ENOMEM;
+		goto free_apwr_gpio;
+	}
+
+	platform_set_drvdata(e740_snd_device, &e740_snd_devdata);
+	e740_snd_devdata.dev = &e740_snd_device->dev;
+	ret = platform_device_add(e740_snd_device);
+
+	if (!ret)
+		return 0;
+
+/* Fail gracefully */
+	platform_device_put(e740_snd_device);
+free_apwr_gpio:
+	gpio_free(GPIO_E740_WM9705_nAVDD2);
+free_op_amp_gpio:
+	gpio_free(GPIO_E740_AMP_ON);
+free_mic_amp_gpio:
+	gpio_free(GPIO_E740_MIC_ON);
+
+	return ret;
+}
+
+static void __exit e740_exit(void)
+{
+	platform_device_unregister(e740_snd_device);
+}
+
+module_init(e740_init);
+module_exit(e740_exit);
+
+/* Module information */
+MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
+MODULE_DESCRIPTION("ALSA SoC driver for e740");
+MODULE_LICENSE("GPL v2");