ASoC: Add initial support of Mitac mioa701 device SoC.

This machine driver enables sound functions on Mitac mio
a701 smartphone. Build upon ASoC v1, it handles :
 - rear speaker
 - front speaker
 - microphone
 - GSM

A global "Mio Mode" switch is not yet provided to cope with
audio path setup. As balance on audio chip line is no more
assured, an incorrect setup can produce a lot of heat and
even fry the battery behind the wm9713 and the speaker
amplifier.

It doesn't cope with :
 - headset jack
 - mio master mode
 - master volume control

This driver is backported from ASoc v2, and amputated from
scenario setups and master volume control.

[Minor mods for terminology in comments -- broonie]

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 250 insertions, 0 deletions

diff --git a/sound/soc/pxa/mioa701_wm9713.c b/sound/soc/pxa/mioa701_wm9713.c
new file mode 100644
index 000000000000..19eda8bbfdaf
--- /dev/null
+++ b/sound/soc/pxa/mioa701_wm9713.c
@@ -0,0 +1,250 @@
+/*
+ * Handles the Mitac mioa701 SoC system
+ *
+ * Copyright (C) 2008 Robert Jarzmik
+ *
+ * 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 in version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This is a little schema of the sound interconnections :
+ *
+ *    Sagem X200                 Wolfson WM9713
+ *    +--------+             +-------------------+      Rear Speaker
+ *    |        |             |                   |           /-+
+ *    |        +--->----->---+MONOIN         SPKL+--->----+-+  |
+ *    |  GSM   |             |                   |        | |  |
+ *    |        +--->----->---+PCBEEP         SPKR+--->----+-+  |
+ *    |  CHIP  |             |                   |           \-+
+ *    |        +---<-----<---+MONO               |
+ *    |        |             |                   |      Front Speaker
+ *    +--------+             |                   |           /-+
+ *                           |                HPL+--->----+-+  |
+ *                           |                   |        | |  |
+ *                           |               OUT3+--->----+-+  |
+ *                           |                   |           \-+
+ *                           |                   |
+ *                           |                   |     Front Micro
+ *                           |                   |         +
+ *                           |               MIC1+-----<--+o+
+ *                           |                   |         +
+ *                           +-------------------+        ---
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-types.h>
+#include <mach/audio.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/ac97_codec.h>
+
+#include "pxa2xx-pcm.h"
+#include "pxa2xx-ac97.h"
+#include "../codecs/wm9713.h"
+
+#define ARRAY_AND_SIZE(x)       (x), ARRAY_SIZE(x)
+
+#define AC97_GPIO_PULL          0x58
+
+/* Use GPIO8 for rear speaker amplifier */
+static int rear_amp_power(struct snd_soc_codec *codec, int power)
+{
+        unsigned short reg;
+
+        if (power) {
+                reg = snd_soc_read(codec, AC97_GPIO_CFG);
+                snd_soc_write(codec, AC97_GPIO_CFG, reg | 0x0100);
+                reg = snd_soc_read(codec, AC97_GPIO_PULL);
+                snd_soc_write(codec, AC97_GPIO_PULL, reg | (1<<15));
+        } else {
+                reg = snd_soc_read(codec, AC97_GPIO_CFG);
+                snd_soc_write(codec, AC97_GPIO_CFG, reg & ~0x0100);
+                reg = snd_soc_read(codec, AC97_GPIO_PULL);
+                snd_soc_write(codec, AC97_GPIO_PULL, reg & ~(1<<15));
+        }
+
+        return 0;
+}
+
+static int rear_amp_event(struct snd_soc_dapm_widget *widget,
+                          struct snd_kcontrol *kctl, int event)
+{
+        struct snd_soc_codec *codec = widget->codec;
+
+        return rear_amp_power(codec, SND_SOC_DAPM_EVENT_ON(event));
+}
+
+/* mioa701 machine dapm widgets */
+static const struct snd_soc_dapm_widget mioa701_dapm_widgets[] = {
+        SND_SOC_DAPM_SPK("Front Speaker", NULL),
+        SND_SOC_DAPM_SPK("Rear Speaker", rear_amp_event),
+        SND_SOC_DAPM_MIC("Headset", NULL),
+        SND_SOC_DAPM_LINE("GSM Line Out", NULL),
+        SND_SOC_DAPM_LINE("GSM Line In", NULL),
+        SND_SOC_DAPM_MIC("Headset Mic", NULL),
+        SND_SOC_DAPM_MIC("Front Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+        /* Call Mic */
+        {"Mic Bias", NULL, "Front Mic"},
+        {"MIC1", NULL, "Mic Bias"},
+
+        /* Headset Mic */
+        {"LINEL", NULL, "Headset Mic"},
+        {"LINER", NULL, "Headset Mic"},
+
+        /* GSM Module */
+        {"MONOIN", NULL, "GSM Line Out"},
+        {"PCBEEP", NULL, "GSM Line Out"},
+        {"GSM Line In", NULL, "MONO"},
+
+        /* headphone connected to HPL, HPR */
+        {"Headset", NULL, "HPL"},
+        {"Headset", NULL, "HPR"},
+
+        /* front speaker connected to HPL, OUT3 */
+        {"Front Speaker", NULL, "HPL"},
+        {"Front Speaker", NULL, "OUT3"},
+
+        /* rear speaker connected to SPKL, SPKR */
+        {"Rear Speaker", NULL, "SPKL"},
+        {"Rear Speaker", NULL, "SPKR"},
+};
+
+static int mioa701_wm9713_init(struct snd_soc_codec *codec)
+{
+        unsigned short reg;
+
+        /* Add mioa701 specific widgets */
+        snd_soc_dapm_new_controls(codec, ARRAY_AND_SIZE(mioa701_dapm_widgets));
+
+        /* Set up mioa701 specific audio path audio_mapnects */
+        snd_soc_dapm_add_routes(codec, ARRAY_AND_SIZE(audio_map));
+
+        /* Prepare GPIO8 for rear speaker amplifier */
+        reg = codec->read(codec, AC97_GPIO_CFG);
+        codec->write(codec, AC97_GPIO_CFG, reg | 0x0100);
+
+        /* Prepare MIC input */
+        reg = codec->read(codec, AC97_3D_CONTROL);
+        codec->write(codec, AC97_3D_CONTROL, reg | 0xc000);
+
+        snd_soc_dapm_enable_pin(codec, "Front Speaker");
+        snd_soc_dapm_enable_pin(codec, "Rear Speaker");
+        snd_soc_dapm_enable_pin(codec, "Front Mic");
+        snd_soc_dapm_enable_pin(codec, "GSM Line In");
+        snd_soc_dapm_enable_pin(codec, "GSM Line Out");
+        snd_soc_dapm_sync(codec);
+
+        return 0;
+}
+
+static struct snd_soc_ops mioa701_ops;
+
+static struct snd_soc_dai_link mioa701_dai[] = {
+        {
+                .name = "AC97",
+                .stream_name = "AC97 HiFi",
+                .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
+                .codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
+                .init = mioa701_wm9713_init,
+                .ops = &mioa701_ops,
+        },
+        {
+                .name = "AC97 Aux",
+                .stream_name = "AC97 Aux",
+                .cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
+                .codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
+                .ops = &mioa701_ops,
+        },
+};
+
+static struct snd_soc_card mioa701 = {
+        .name = "MioA701",
+        .platform = &pxa2xx_soc_platform,
+        .dai_link = mioa701_dai,
+        .num_links = ARRAY_SIZE(mioa701_dai),
+};
+
+static struct snd_soc_device mioa701_snd_devdata = {
+        .card = &mioa701,
+        .codec_dev = &soc_codec_dev_wm9713,
+};
+
+static struct platform_device *mioa701_snd_device;
+
+static int mioa701_wm9713_probe(struct platform_device *pdev)
+{
+        int ret;
+
+        if (!machine_is_mioa701())
+                return -ENODEV;
+
+        dev_warn(&pdev->dev, "Be warned that incorrect mixers/muxes setup will"
+                 "lead to overheating and possible destruction of your device."
+                 "Do not use without a good knowledge of mio's board design!\n");
+
+        mioa701_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!mioa701_snd_device)
+                return -ENOMEM;
+
+        platform_set_drvdata(mioa701_snd_device, &mioa701_snd_devdata);
+        mioa701_snd_devdata.dev = &mioa701_snd_device->dev;
+
+        ret = platform_device_add(mioa701_snd_device);
+        if (!ret)
+                return 0;
+
+        platform_device_put(mioa701_snd_device);
+        return ret;
+}
+
+static int __devexit mioa701_wm9713_remove(struct platform_device *pdev)
+{
+        platform_device_unregister(mioa701_snd_device);
+        return 0;
+}
+
+static struct platform_driver mioa701_wm9713_driver = {
+        .probe          = mioa701_wm9713_probe,
+        .remove         = __devexit_p(mioa701_wm9713_remove),
+        .driver         = {
+                .name           = "mioa701-wm9713",
+                .owner          = THIS_MODULE,
+        },
+};
+
+static int __init mioa701_asoc_init(void)
+{
+        return platform_driver_register(&mioa701_wm9713_driver);
+}
+
+static void __exit mioa701_asoc_exit(void)
+{
+        platform_driver_unregister(&mioa701_wm9713_driver);
+}
+
+module_init(mioa701_asoc_init);
+module_exit(mioa701_asoc_exit);
+
+/* Module information */
+MODULE_AUTHOR("Robert Jarzmik (rjarzmik@free.fr)");
+MODULE_DESCRIPTION("ALSA SoC WM9713 MIO A701");
+MODULE_LICENSE("GPL");