Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 282 insertions, 0 deletions

diff --git a/kernel/sound/ppc/daca.c b/kernel/sound/ppc/daca.c
new file mode 100644
index 000000000..b86526223
--- /dev/null
+++ b/kernel/sound/ppc/daca.c
@@ -0,0 +1,282 @@
+/*
+ * PMac DACA lowlevel functions
+ *
+ * Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ *
+ *   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.
+ *
+ *   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
+ */
+
+
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/kmod.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include "pmac.h"
+
+/* i2c address */
+#define DACA_I2C_ADDR	0x4d
+
+/* registers */
+#define DACA_REG_SR	0x01
+#define DACA_REG_AVOL	0x02
+#define DACA_REG_GCFG	0x03
+
+/* maximum volume value */
+#define DACA_VOL_MAX	0x38
+
+
+struct pmac_daca {
+	struct pmac_keywest i2c;
+	int left_vol, right_vol;
+	unsigned int deemphasis : 1;
+	unsigned int amp_on : 1;
+};
+
+
+/*
+ * initialize / detect DACA
+ */
+static int daca_init_client(struct pmac_keywest *i2c)
+{
+	unsigned short wdata = 0x00;
+	/* SR: no swap, 1bit delay, 32-48kHz */
+	/* GCFG: power amp inverted, DAC on */
+	if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
+	    i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
+		return -EINVAL;
+	return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
+					  2, (unsigned char*)&wdata);
+}
+
+/*
+ * update volume
+ */
+static int daca_set_volume(struct pmac_daca *mix)
+{
+	unsigned char data[2];
+  
+	if (! mix->i2c.client)
+		return -ENODEV;
+  
+	if (mix->left_vol > DACA_VOL_MAX)
+		data[0] = DACA_VOL_MAX;
+	else
+		data[0] = mix->left_vol;
+	if (mix->right_vol > DACA_VOL_MAX)
+		data[1] = DACA_VOL_MAX;
+	else
+		data[1] = mix->right_vol;
+	data[1] |= mix->deemphasis ? 0x40 : 0;
+	if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
+				       2, data) < 0) {
+		snd_printk(KERN_ERR "failed to set volume \n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+
+/* deemphasis switch */
+#define daca_info_deemphasis		snd_ctl_boolean_mono_info
+
+static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+	struct pmac_daca *mix;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
+	return 0;
+}
+
+static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+	struct pmac_daca *mix;
+	int change;
+
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	change = mix->deemphasis != ucontrol->value.integer.value[0];
+	if (change) {
+		mix->deemphasis = !!ucontrol->value.integer.value[0];
+		daca_set_volume(mix);
+	}
+	return change;
+}
+
+/* output volume */
+static int daca_info_volume(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = DACA_VOL_MAX;
+	return 0;
+}
+
+static int daca_get_volume(struct snd_kcontrol *kcontrol,
+			   struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+	struct pmac_daca *mix;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	ucontrol->value.integer.value[0] = mix->left_vol;
+	ucontrol->value.integer.value[1] = mix->right_vol;
+	return 0;
+}
+
+static int daca_put_volume(struct snd_kcontrol *kcontrol,
+			   struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+	struct pmac_daca *mix;
+	unsigned int vol[2];
+	int change;
+
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	vol[0] = ucontrol->value.integer.value[0];
+	vol[1] = ucontrol->value.integer.value[1];
+	if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
+		return -EINVAL;
+	change = mix->left_vol != vol[0] ||
+		mix->right_vol != vol[1];
+	if (change) {
+		mix->left_vol = vol[0];
+		mix->right_vol = vol[1];
+		daca_set_volume(mix);
+	}
+	return change;
+}
+
+/* amplifier switch */
+#define daca_info_amp	daca_info_deemphasis
+
+static int daca_get_amp(struct snd_kcontrol *kcontrol,
+			struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+	struct pmac_daca *mix;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
+	return 0;
+}
+
+static int daca_put_amp(struct snd_kcontrol *kcontrol,
+			struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
+	struct pmac_daca *mix;
+	int change;
+
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	change = mix->amp_on != ucontrol->value.integer.value[0];
+	if (change) {
+		mix->amp_on = !!ucontrol->value.integer.value[0];
+		i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
+					  mix->amp_on ? 0x05 : 0x04);
+	}
+	return change;
+}
+
+static struct snd_kcontrol_new daca_mixers[] = {
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Deemphasis Switch",
+	  .info = daca_info_deemphasis,
+	  .get = daca_get_deemphasis,
+	  .put = daca_put_deemphasis
+	},
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Master Playback Volume",
+	  .info = daca_info_volume,
+	  .get = daca_get_volume,
+	  .put = daca_put_volume
+	},
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Power Amplifier Switch",
+	  .info = daca_info_amp,
+	  .get = daca_get_amp,
+	  .put = daca_put_amp
+	},
+};
+
+
+#ifdef CONFIG_PM
+static void daca_resume(struct snd_pmac *chip)
+{
+	struct pmac_daca *mix = chip->mixer_data;
+	i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
+	i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
+				  mix->amp_on ? 0x05 : 0x04);
+	daca_set_volume(mix);
+}
+#endif /* CONFIG_PM */
+
+
+static void daca_cleanup(struct snd_pmac *chip)
+{
+	struct pmac_daca *mix = chip->mixer_data;
+	if (! mix)
+		return;
+	snd_pmac_keywest_cleanup(&mix->i2c);
+	kfree(mix);
+	chip->mixer_data = NULL;
+}
+
+/* exported */
+int snd_pmac_daca_init(struct snd_pmac *chip)
+{
+	int i, err;
+	struct pmac_daca *mix;
+
+	request_module("i2c-powermac");
+
+	mix = kzalloc(sizeof(*mix), GFP_KERNEL);
+	if (! mix)
+		return -ENOMEM;
+	chip->mixer_data = mix;
+	chip->mixer_free = daca_cleanup;
+	mix->amp_on = 1; /* default on */
+
+	mix->i2c.addr = DACA_I2C_ADDR;
+	mix->i2c.init_client = daca_init_client;
+	mix->i2c.name = "DACA";
+	if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
+		return err;
+
+	/*
+	 * build mixers
+	 */
+	strcpy(chip->card->mixername, "PowerMac DACA");
+
+	for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
+		if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
+			return err;
+	}
+
+#ifdef CONFIG_PM
+	chip->resume = daca_resume;
+#endif
+
+	return 0;
+}