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, 165 insertions, 0 deletions

diff --git a/kernel/sound/pci/echoaudio/indigodj_dsp.c b/kernel/sound/pci/echoaudio/indigodj_dsp.c
new file mode 100644
index 000000000..2cf5cc092
--- /dev/null
+++ b/kernel/sound/pci/echoaudio/indigodj_dsp.c
@@ -0,0 +1,165 @@
+/****************************************************************************
+
+   Copyright Echo Digital Audio Corporation (c) 1998 - 2004
+   All rights reserved
+   www.echoaudio.com
+
+   This file is part of Echo Digital Audio's generic driver library.
+
+   Echo Digital Audio's generic driver library 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.
+
+   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.
+
+   *************************************************************************
+
+ Translation from C++ and adaptation for use in ALSA-Driver
+ were made by Giuliano Pochini <pochini@shiny.it>
+
+****************************************************************************/
+
+
+static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
+			   int gain);
+static int update_vmixer_level(struct echoaudio *chip);
+
+
+static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
+{
+	int err;
+
+	if (snd_BUG_ON((subdevice_id & 0xfff0) != INDIGO_DJ))
+		return -ENODEV;
+
+	if ((err = init_dsp_comm_page(chip))) {
+		dev_err(chip->card->dev,
+			"init_hw - could not initialize DSP comm page\n");
+		return err;
+	}
+
+	chip->device_id = device_id;
+	chip->subdevice_id = subdevice_id;
+	chip->bad_board = TRUE;
+	chip->dsp_code_to_load = FW_INDIGO_DJ_DSP;
+	/* Since this card has no ASIC, mark it as loaded so everything
+	   works OK */
+	chip->asic_loaded = TRUE;
+	chip->input_clock_types = ECHO_CLOCK_BIT_INTERNAL;
+
+	if ((err = load_firmware(chip)) < 0)
+		return err;
+	chip->bad_board = FALSE;
+
+	return err;
+}
+
+
+
+static int set_mixer_defaults(struct echoaudio *chip)
+{
+	return init_line_levels(chip);
+}
+
+
+
+static u32 detect_input_clocks(const struct echoaudio *chip)
+{
+	return ECHO_CLOCK_BIT_INTERNAL;
+}
+
+
+
+/* The IndigoDJ has no ASIC. Just do nothing */
+static int load_asic(struct echoaudio *chip)
+{
+	return 0;
+}
+
+
+
+static int set_sample_rate(struct echoaudio *chip, u32 rate)
+{
+	u32 control_reg;
+
+	switch (rate) {
+	case 96000:
+		control_reg = MIA_96000;
+		break;
+	case 88200:
+		control_reg = MIA_88200;
+		break;
+	case 48000:
+		control_reg = MIA_48000;
+		break;
+	case 44100:
+		control_reg = MIA_44100;
+		break;
+	case 32000:
+		control_reg = MIA_32000;
+		break;
+	default:
+		dev_err(chip->card->dev,
+			"set_sample_rate: %d invalid!\n", rate);
+		return -EINVAL;
+	}
+
+	/* Set the control register if it has changed */
+	if (control_reg != le32_to_cpu(chip->comm_page->control_register)) {
+		if (wait_handshake(chip))
+			return -EIO;
+
+		chip->comm_page->sample_rate = cpu_to_le32(rate);	/* ignored by the DSP */
+		chip->comm_page->control_register = cpu_to_le32(control_reg);
+		chip->sample_rate = rate;
+
+		clear_handshake(chip);
+		return send_vector(chip, DSP_VC_UPDATE_CLOCKS);
+	}
+	return 0;
+}
+
+
+
+/* This function routes the sound from a virtual channel to a real output */
+static int set_vmixer_gain(struct echoaudio *chip, u16 output, u16 pipe,
+			   int gain)
+{
+	int index;
+
+	if (snd_BUG_ON(pipe >= num_pipes_out(chip) ||
+		       output >= num_busses_out(chip)))
+		return -EINVAL;
+
+	if (wait_handshake(chip))
+		return -EIO;
+
+	chip->vmixer_gain[output][pipe] = gain;
+	index = output * num_pipes_out(chip) + pipe;
+	chip->comm_page->vmixer[index] = gain;
+
+	dev_dbg(chip->card->dev,
+		"set_vmixer_gain: pipe %d, out %d = %d\n", pipe, output, gain);
+	return 0;
+}
+
+
+
+/* Tell the DSP to read and update virtual mixer levels in comm page. */
+static int update_vmixer_level(struct echoaudio *chip)
+{
+	if (wait_handshake(chip))
+		return -EIO;
+	clear_handshake(chip);
+	return send_vector(chip, DSP_VC_SET_VMIXER_GAIN);
+}
+