[ALSA] ASoC pxa2xx Poodle machine support

This patch adds Alsa audio support to the Sharp Zaurus SL-C5600 (Poodle)
machine.
From: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 329 insertions, 0 deletions

diff --git a/sound/soc/pxa/poodle.c b/sound/soc/pxa/poodle.c
new file mode 100644
index 000000000000..ee9336086820
--- /dev/null
+++ b/sound/soc/pxa/poodle.c
@@ -0,0 +1,329 @@
+/*
+ * poodle.c  --  SoC audio for Poodle
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ *
+ * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
+ *          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/interrupt.h>
+#include <linux/platform_device.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/mach-types.h>
+#include <asm/hardware/locomo.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/poodle.h>
+#include <asm/arch/audio.h>
+
+#include "../codecs/wm8731.h"
+#include "pxa2xx-pcm.h"
+
+#define POODLE_HP        1
+#define POODLE_HP_OFF    0
+#define POODLE_SPK_ON    1
+#define POODLE_SPK_OFF   0
+
+ /* audio clock in Hz - rounded from 12.235MHz */
+#define POODLE_AUDIO_CLOCK 12288000
+
+static int poodle_jack_func;
+static int poodle_spk_func;
+
+static void poodle_ext_control(struct snd_soc_codec *codec)
+{
+        int spk = 0;
+
+        /* set up jack connection */
+        if (poodle_jack_func == POODLE_HP) {
+                /* set = unmute headphone */
+                locomo_gpio_write(&poodle_locomo_device.dev,
+                        POODLE_LOCOMO_GPIO_MUTE_L, 1);
+                locomo_gpio_write(&poodle_locomo_device.dev,
+                        POODLE_LOCOMO_GPIO_MUTE_R, 1);
+                snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
+        } else {
+                locomo_gpio_write(&poodle_locomo_device.dev,
+                        POODLE_LOCOMO_GPIO_MUTE_L, 0);
+                locomo_gpio_write(&poodle_locomo_device.dev,
+                        POODLE_LOCOMO_GPIO_MUTE_R, 0);
+                snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 0);
+        }
+
+        if (poodle_spk_func == POODLE_SPK_ON)
+                spk = 1;
+
+        /* set the enpoints to their new connetion states */
+        snd_soc_dapm_set_endpoint(codec, "Ext Spk", spk);
+
+        /* signal a DAPM event */
+        snd_soc_dapm_sync_endpoints(codec);
+}
+
+static int poodle_startup(struct snd_pcm_substream *substream)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_codec *codec = rtd->socdev->codec;
+
+        /* check the jack status at stream startup */
+        poodle_ext_control(codec);
+        return 0;
+}
+
+/* we need to unmute the HP at shutdown as the mute burns power on poodle */
+static int poodle_shutdown(struct snd_pcm_substream *substream)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_codec *codec = rtd->socdev->codec;
+
+        /* set = unmute headphone */
+        locomo_gpio_write(&poodle_locomo_device.dev,
+                POODLE_LOCOMO_GPIO_MUTE_L, 1);
+        locomo_gpio_write(&poodle_locomo_device.dev,
+                POODLE_LOCOMO_GPIO_MUTE_R, 1);
+        return 0;
+}
+
+static struct snd_soc_ops poodle_ops = {
+        .startup = poodle_startup,
+        .shutdown = poodle_shutdown,
+};
+
+static int poodle_get_jack(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        ucontrol->value.integer.value[0] = poodle_jack_func;
+        return 0;
+}
+
+static int poodle_set_jack(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
+
+        if (poodle_jack_func == ucontrol->value.integer.value[0])
+                return 0;
+
+        poodle_jack_func = ucontrol->value.integer.value[0];
+        poodle_ext_control(codec);
+        return 1;
+}
+
+static int poodle_get_spk(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        ucontrol->value.integer.value[0] = poodle_spk_func;
+        return 0;
+}
+
+static int poodle_set_spk(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
+
+        if (poodle_spk_func == ucontrol->value.integer.value[0])
+                return 0;
+
+        poodle_spk_func = ucontrol->value.integer.value[0];
+        poodle_ext_control(codec);
+        return 1;
+}
+
+static int poodle_amp_event(struct snd_soc_dapm_widget *w, int event)
+{
+        if (SND_SOC_DAPM_EVENT_ON(event))
+                locomo_gpio_write(&poodle_locomo_device.dev,
+                        POODLE_LOCOMO_GPIO_AMP_ON, 0);
+        else
+                locomo_gpio_write(&poodle_locomo_device.dev,
+                        POODLE_LOCOMO_GPIO_AMP_ON, 1);
+
+        return 0;
+}
+
+/* poodle machine dapm widgets */
+static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
+SND_SOC_DAPM_HP("Headphone Jack", NULL),
+SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
+};
+
+/* Corgi machine audio_mapnections to the codec pins */
+static const char *audio_map[][3] = {
+
+        /* 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"},
+
+        {NULL, NULL, NULL},
+};
+
+static const char *jack_function[] = {"Off", "Headphone"};
+static const char *spk_function[] = {"Off", "On"};
+static const struct soc_enum poodle_enum[] = {
+        SOC_ENUM_SINGLE_EXT(2, jack_function),
+        SOC_ENUM_SINGLE_EXT(2, spk_function),
+};
+
+static const snd_kcontrol_new_t wm8731_poodle_controls[] = {
+        SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
+                poodle_set_jack),
+        SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
+                poodle_set_spk),
+};
+
+/*
+ * Logic for a wm8731 as connected on a Sharp SL-C7x0 Device
+ */
+static int poodle_wm8731_init(struct snd_soc_codec *codec)
+{
+        int i, err;
+
+        snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
+        snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
+        snd_soc_dapm_set_endpoint(codec, "MICIN", 1);
+
+        /* Add poodle specific controls */
+        for (i = 0; i < ARRAY_SIZE(wm8731_poodle_controls); i++) {
+                err = snd_ctl_add(codec->card,
+                        snd_soc_cnew(&wm8731_poodle_controls[i],codec, NULL));
+                if (err < 0)
+                        return err;
+        }
+
+        /* Add poodle specific widgets */
+        for (i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++) {
+                snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]);
+        }
+
+        /* Set up poodle specific audio path audio_map */
+        for (i = 0; audio_map[i][0] != NULL; i++) {
+                snd_soc_dapm_connect_input(codec, audio_map[i][0],
+                        audio_map[i][1], audio_map[i][2]);
+        }
+
+        snd_soc_dapm_sync_endpoints(codec);
+        return 0;
+}
+
+static unsigned int poodle_config_sysclk(struct snd_soc_pcm_runtime *rtd,
+        struct snd_soc_clock_info *info)
+{
+        if (info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) {
+                /* pxa2xx is i2s master  */
+                switch (info->rate) {
+                case 44100:
+                case 88200:
+                        /* configure codec digital filters for 44.1, 88.2 */
+                        rtd->codec_dai->config_sysclk(rtd->codec_dai, info,
+                                11289600);
+                break;
+                default:
+                        /* configure codec digital filters for all other rates */
+                        rtd->codec_dai->config_sysclk(rtd->codec_dai, info,
+                                POODLE_AUDIO_CLOCK);
+                break;
+                }
+                return rtd->cpu_dai->config_sysclk(rtd->cpu_dai, info,
+                        POODLE_AUDIO_CLOCK);
+        } else {
+                /* codec is i2s master -
+                 * only configure codec DAI clock and filters */
+                return rtd->codec_dai->config_sysclk(rtd->codec_dai, info,
+                        POODLE_AUDIO_CLOCK);
+        }
+}
+
+/* poodle digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link poodle_dai = {
+        .name = "WM8731",
+        .stream_name = "WM8731",
+        .cpu_dai = &pxa_i2s_dai,
+        .codec_dai = &wm8731_dai,
+        .init = poodle_wm8731_init,
+        .config_sysclk = poodle_config_sysclk,
+};
+
+/* poodle audio machine driver */
+static struct snd_soc_machine snd_soc_machine_poodle = {
+        .name = "Poodle",
+        .dai_link = &poodle_dai,
+        .num_links = 1,
+        .ops = &poodle_ops,
+};
+
+/* poodle audio private data */
+static struct wm8731_setup_data poodle_wm8731_setup = {
+        .i2c_address = 0x1b,
+};
+
+/* poodle audio subsystem */
+static struct snd_soc_device poodle_snd_devdata = {
+        .machine = &snd_soc_machine_poodle,
+        .platform = &pxa2xx_soc_platform,
+        .codec_dev = &soc_codec_dev_wm8731,
+        .codec_data = &poodle_wm8731_setup,
+};
+
+static struct platform_device *poodle_snd_device;
+
+static int __init poodle_init(void)
+{
+        int ret;
+
+        if (!machine_is_poodle())
+                return -ENODEV;
+
+        locomo_gpio_set_dir(&poodle_locomo_device.dev,
+                POODLE_LOCOMO_GPIO_AMP_ON, 0);
+        /* should we mute HP at startup - burning power ?*/
+        locomo_gpio_set_dir(&poodle_locomo_device.dev,
+                POODLE_LOCOMO_GPIO_MUTE_L, 0);
+        locomo_gpio_set_dir(&poodle_locomo_device.dev,
+                POODLE_LOCOMO_GPIO_MUTE_R, 0);
+
+        poodle_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!poodle_snd_device)
+                return -ENOMEM;
+
+        platform_set_drvdata(poodle_snd_device, &poodle_snd_devdata);
+        poodle_snd_devdata.dev = &poodle_snd_device->dev;
+        ret = platform_device_add(poodle_snd_device);
+
+        if (ret)
+                platform_device_put(poodle_snd_device);
+
+        return ret;
+}
+
+static void __exit poodle_exit(void)
+{
+        platform_device_unregister(poodle_snd_device);
+}
+
+module_init(poodle_init);
+module_exit(poodle_exit);
+
+/* Module information */
+MODULE_AUTHOR("Richard Purdie");
+MODULE_DESCRIPTION("ALSA SoC Poodle");
+MODULE_LICENSE("GPL");