ASoC: machine driver for Toshiba e800

This patch adds support for the wm9712 ac97 codec as used in the Toshiba e800
PDA. It includes support for powering up / down the external headphone and
speaker amplifiers on this machine.

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

1 files changed, 102 insertions, 14 deletions

diff --git a/sound/soc/pxa/e800_wm9712.c b/sound/soc/pxa/e800_wm9712.c
index 2e3386dfa0f0..78a1770b986c 100644
--- a/sound/soc/pxa/e800_wm9712.c
+++ b/sound/soc/pxa/e800_wm9712.c
@@ -1,8 +1,6 @@
 /*
  * e800-wm9712.c  --  SoC audio for e800
  *
- * Based on tosa.c
- *
  * Copyright 2007 (c) Ian Molton <spyro@f2s.com>
  *
  *  This program is free software; you can redistribute  it and/or modify it
@@ -13,31 +11,96 @@
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
-#include <linux/device.h>
+#include <linux/gpio.h>
 
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 
-#include <asm/mach-types.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/wm9712.h"
 #include "pxa2xx-pcm.h"
 #include "pxa2xx-ac97.h"
 
-static struct snd_soc_card e800;
+static int e800_spk_amp_event(struct snd_soc_dapm_widget *w,
+                                struct snd_kcontrol *kcontrol, int event)
+{
+        if (event & SND_SOC_DAPM_PRE_PMU)
+                gpio_set_value(GPIO_E800_SPK_AMP_ON, 1);
+        else if (event & SND_SOC_DAPM_POST_PMD)
+                gpio_set_value(GPIO_E800_SPK_AMP_ON, 0);
 
-static struct snd_soc_dai_link e800_dai[] = {
+        return 0;
+}
+
+static int e800_hp_amp_event(struct snd_soc_dapm_widget *w,
+                                struct snd_kcontrol *kcontrol, int event)
 {
-        .name = "AC97 Aux",
-        .stream_name = "AC97 Aux",
-        .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
-        .codec_dai = &wm9712_dai[WM9712_DAI_AC97_AUX],
-},
+        if (event & SND_SOC_DAPM_PRE_PMU)
+                gpio_set_value(GPIO_E800_HP_AMP_OFF, 0);
+        else if (event & SND_SOC_DAPM_POST_PMD)
+                gpio_set_value(GPIO_E800_HP_AMP_OFF, 1);
+
+        return 0;
+}
+
+static const struct snd_soc_dapm_widget e800_dapm_widgets[] = {
+        SND_SOC_DAPM_HP("Headphone Jack", NULL),
+        SND_SOC_DAPM_MIC("Mic (Internal1)", NULL),
+        SND_SOC_DAPM_MIC("Mic (Internal2)", NULL),
+        SND_SOC_DAPM_SPK("Speaker", NULL),
+        SND_SOC_DAPM_PGA_E("Headphone Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
+                        e800_hp_amp_event, SND_SOC_DAPM_PRE_PMU |
+                        SND_SOC_DAPM_POST_PMD),
+        SND_SOC_DAPM_PGA_E("Speaker Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
+                        e800_spk_amp_event, SND_SOC_DAPM_PRE_PMU |
+                        SND_SOC_DAPM_POST_PMD),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+        {"Headphone Jack", NULL, "HPOUTL"},
+        {"Headphone Jack", NULL, "HPOUTR"},
+        {"Headphone Jack", NULL, "Headphone Amp"},
+
+        {"Speaker Amp", NULL, "MONOOUT"},
+        {"Speaker", NULL, "Speaker Amp"},
+
+        {"MIC1", NULL, "Mic (Internal1)"},
+        {"MIC2", NULL, "Mic (Internal2)"},
+};
+
+static int e800_ac97_init(struct snd_soc_codec *codec)
+{
+        snd_soc_dapm_new_controls(codec, e800_dapm_widgets,
+                                        ARRAY_SIZE(e800_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 e800_dai[] = {
+        {
+                .name = "AC97",
+                .stream_name = "AC97 HiFi",
+                .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
+                .codec_dai = &wm9712_dai[WM9712_DAI_AC97_HIFI],
+                .init = e800_ac97_init,
+        },
+        {
+                .name = "AC97 Aux",
+                .stream_name = "AC97 Aux",
+                .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
+                .codec_dai = &wm9712_dai[WM9712_DAI_AC97_AUX],
+        },
 };
 
 static struct snd_soc_card e800 = {
@@ -61,6 +124,22 @@ static int __init e800_init(void)
         if (!machine_is_e800())
                 return -ENODEV;
 
+        ret = gpio_request(GPIO_E800_HP_AMP_OFF,  "Headphone amp");
+        if (ret)
+                return ret;
+
+        ret = gpio_request(GPIO_E800_SPK_AMP_ON, "Speaker amp");
+        if (ret)
+                goto free_hp_amp_gpio;
+
+        ret = gpio_direction_output(GPIO_E800_HP_AMP_OFF, 1);
+        if (ret)
+                goto free_spk_amp_gpio;
+
+        ret = gpio_direction_output(GPIO_E800_SPK_AMP_ON, 1);
+        if (ret)
+                goto free_spk_amp_gpio;
+
         e800_snd_device = platform_device_alloc("soc-audio", -1);
         if (!e800_snd_device)
                 return -ENOMEM;
@@ -69,8 +148,15 @@ static int __init e800_init(void)
         e800_snd_devdata.dev = &e800_snd_device->dev;
         ret = platform_device_add(e800_snd_device);
 
-        if (ret)
-                platform_device_put(e800_snd_device);
+        if (!ret)
+                return 0;
+
+/* Fail gracefully */
+        platform_device_put(e800_snd_device);
+free_spk_amp_gpio:
+        gpio_free(GPIO_E800_SPK_AMP_ON);
+free_hp_amp_gpio:
+        gpio_free(GPIO_E800_HP_AMP_OFF);
 
         return ret;
 }
@@ -78,6 +164,8 @@ static int __init e800_init(void)
 static void __exit e800_exit(void)
 {
         platform_device_unregister(e800_snd_device);
+        gpio_free(GPIO_E800_SPK_AMP_ON);
+        gpio_free(GPIO_E800_HP_AMP_OFF);
 }
 
 module_init(e800_init);
@@ -86,4 +174,4 @@ module_exit(e800_exit);
 /* Module information */
 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 MODULE_DESCRIPTION("ALSA SoC driver for e800");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");