[ALSA] ASoC pxa2xx Corgi machine support

This patch adds Alsa audio support to the Sharp Zaurus SL-C7x0/C860
(Corgi) machines.
From: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Graeme Gregory <dp@xora.org.uk>
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, 361 insertions, 0 deletions

diff --git a/sound/soc/pxa/corgi.c b/sound/soc/pxa/corgi.c
new file mode 100644
index 000000000000..2b1c6e94d1e4
--- /dev/null
+++ b/sound/soc/pxa/corgi.c
@@ -0,0 +1,361 @@
+/*
+ * corgi.c  --  SoC audio for Corgi
+ *
+ * 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.
+ *
+ *  Revision history
+ *    30th Nov 2005   Initial 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/scoop.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/corgi.h>
+#include <asm/arch/audio.h>
+
+#include "../codecs/wm8731.h"
+#include "pxa2xx-pcm.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_codec *codec)
+{
+        int spk = 0, mic = 0, line = 0, hp = 0, hs = 0;
+
+        /* set up jack connection */
+        switch (corgi_jack_func) {
+        case CORGI_HP:
+                hp = 1;
+                /* set = unmute headphone */
+                set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_L);
+                set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_R);
+                break;
+        case CORGI_MIC:
+                mic = 1;
+                /* reset = mute headphone */
+                reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_L);
+                reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_R);
+                break;
+        case CORGI_LINE:
+                line = 1;
+                reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_L);
+                reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_R);
+                break;
+        case CORGI_HEADSET:
+                hs = 1;
+                mic = 1;
+                reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_L);
+                set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_R);
+                break;
+        }
+
+        if (corgi_spk_func == CORGI_SPK_ON)
+                spk = 1;
+
+        /* set the enpoints to their new connetion states */
+        snd_soc_dapm_set_endpoint(codec, "Ext Spk", spk);
+        snd_soc_dapm_set_endpoint(codec, "Mic Jack", mic);
+        snd_soc_dapm_set_endpoint(codec, "Line Jack", line);
+        snd_soc_dapm_set_endpoint(codec, "Headphone Jack", hp);
+        snd_soc_dapm_set_endpoint(codec, "Headset Jack", hs);
+
+        /* signal a DAPM event */
+        snd_soc_dapm_sync_endpoints(codec);
+}
+
+static int corgi_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 */
+        corgi_ext_control(codec);
+        return 0;
+}
+
+/* we need to unmute the HP at shutdown as the mute burns power on corgi */
+static int corgi_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 */
+        set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_L);
+        set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MUTE_R);
+        return 0;
+}
+
+static struct snd_soc_ops corgi_ops = {
+        .startup = corgi_startup,
+        .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_codec *codec = 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(codec);
+        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_codec *codec =  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(codec);
+        return 1;
+}
+
+static int corgi_amp_event(struct snd_soc_dapm_widget *w, int event)
+{
+        if (SND_SOC_DAPM_EVENT_ON(event))
+                set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_APM_ON);
+        else
+                reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_APM_ON);
+
+        return 0;
+}
+
+static int corgi_mic_event(struct snd_soc_dapm_widget *w, int event)
+{
+        if (SND_SOC_DAPM_EVENT_ON(event))
+                set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MIC_BIAS);
+        else
+                reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_MIC_BIAS);
+
+        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 char *audio_map[][3] = {
+
+        /* 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"},
+
+        {NULL, NULL, NULL},
+};
+
+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_codec *codec)
+{
+        int i, err;
+
+        snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
+        snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
+
+        /* Add corgi specific controls */
+        for (i = 0; i < ARRAY_SIZE(wm8731_corgi_controls); i++) {
+                err = snd_ctl_add(codec->card,
+                        snd_soc_cnew(&wm8731_corgi_controls[i],codec, NULL));
+                if (err < 0)
+                        return err;
+        }
+
+        /* Add corgi specific widgets */
+        for(i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++) {
+                snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]);
+        }
+
+        /* Set up corgi 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 corgi_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,
+                                CORGI_AUDIO_CLOCK);
+                break;
+                }
+                /* config pxa i2s as master */
+                return rtd->cpu_dai->config_sysclk(rtd->cpu_dai, info,
+                        CORGI_AUDIO_CLOCK);
+        } else {
+                /* codec is i2s master -
+                 * only configure codec DAI clock and filters */
+                return rtd->codec_dai->config_sysclk(rtd->codec_dai, info,
+                        CORGI_AUDIO_CLOCK);
+        }
+}
+
+/* corgi digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link corgi_dai = {
+        .name = "WM8731",
+        .stream_name = "WM8731",
+        .cpu_dai = &pxa_i2s_dai,
+        .codec_dai = &wm8731_dai,
+        .init = corgi_wm8731_init,
+        .config_sysclk = corgi_config_sysclk,
+};
+
+/* corgi audio machine driver */
+static struct snd_soc_machine snd_soc_machine_corgi = {
+        .name = "Corgi",
+        .dai_link = &corgi_dai,
+        .num_links = 1,
+        .ops = &corgi_ops,
+};
+
+/* corgi audio private data */
+static struct wm8731_setup_data corgi_wm8731_setup = {
+        .i2c_address = 0x1b,
+};
+
+/* corgi audio subsystem */
+static struct snd_soc_device corgi_snd_devdata = {
+        .machine = &snd_soc_machine_corgi,
+        .platform = &pxa2xx_soc_platform,
+        .codec_dev = &soc_codec_dev_wm8731,
+        .codec_data = &corgi_wm8731_setup,
+};
+
+static struct platform_device *corgi_snd_device;
+
+static int __init corgi_init(void)
+{
+        int ret;
+
+        if (!(machine_is_corgi() || machine_is_shepherd() || machine_is_husky()))
+                return -ENODEV;
+
+        corgi_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!corgi_snd_device)
+                return -ENOMEM;
+
+        platform_set_drvdata(corgi_snd_device, &corgi_snd_devdata);
+        corgi_snd_devdata.dev = &corgi_snd_device->dev;
+        ret = platform_device_add(corgi_snd_device);
+
+        if (ret)
+                platform_device_put(corgi_snd_device);
+
+        return ret;
+}
+
+static void __exit corgi_exit(void)
+{
+        platform_device_unregister(corgi_snd_device);
+}
+
+module_init(corgi_init);
+module_exit(corgi_exit);
+
+/* Module information */
+MODULE_AUTHOR("Richard Purdie");
+MODULE_DESCRIPTION("ALSA SoC Corgi");
+MODULE_LICENSE("GPL");