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, 278 insertions, 0 deletions

diff --git a/kernel/drivers/input/tablet/acecad.c b/kernel/drivers/input/tablet/acecad.c
new file mode 100644
index 000000000..889f6b77e
--- /dev/null
+++ b/kernel/drivers/input/tablet/acecad.c
@@ -0,0 +1,278 @@
+/*
+ *  Copyright (c) 2001-2005 Edouard TISSERANT   <edouard.tisserant@wanadoo.fr>
+ *  Copyright (c) 2004-2005 Stephane VOLTZ      <svoltz@numericable.fr>
+ *
+ *  USB Acecad "Acecad Flair" tablet support
+ *
+ *  Changelog:
+ *      v3.2 - Added sysfs support
+ */
+
+/*
+ * 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/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/usb/input.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v3.2"
+#define DRIVER_DESC    "USB Acecad Flair tablet driver"
+#define DRIVER_LICENSE "GPL"
+#define DRIVER_AUTHOR  "Edouard TISSERANT <edouard.tisserant@wanadoo.fr>"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+
+#define USB_VENDOR_ID_ACECAD	0x0460
+#define USB_DEVICE_ID_FLAIR	0x0004
+#define USB_DEVICE_ID_302	0x0008
+
+struct usb_acecad {
+	char name[128];
+	char phys[64];
+	struct usb_device *usbdev;
+	struct usb_interface *intf;
+	struct input_dev *input;
+	struct urb *irq;
+
+	unsigned char *data;
+	dma_addr_t data_dma;
+};
+
+static void usb_acecad_irq(struct urb *urb)
+{
+	struct usb_acecad *acecad = urb->context;
+	unsigned char *data = acecad->data;
+	struct input_dev *dev = acecad->input;
+	struct usb_interface *intf = acecad->intf;
+	int prox, status;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated, clean up */
+		dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
+			__func__, urb->status);
+		return;
+	default:
+		dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
+			__func__, urb->status);
+		goto resubmit;
+	}
+
+	prox = (data[0] & 0x04) >> 2;
+	input_report_key(dev, BTN_TOOL_PEN, prox);
+
+	if (prox) {
+		int x = data[1] | (data[2] << 8);
+		int y = data[3] | (data[4] << 8);
+		/* Pressure should compute the same way for flair and 302 */
+		int pressure = data[5] | (data[6] << 8);
+		int touch = data[0] & 0x01;
+		int stylus = (data[0] & 0x10) >> 4;
+		int stylus2 = (data[0] & 0x20) >> 5;
+		input_report_abs(dev, ABS_X, x);
+		input_report_abs(dev, ABS_Y, y);
+		input_report_abs(dev, ABS_PRESSURE, pressure);
+		input_report_key(dev, BTN_TOUCH, touch);
+		input_report_key(dev, BTN_STYLUS, stylus);
+		input_report_key(dev, BTN_STYLUS2, stylus2);
+	}
+
+	/* event termination */
+	input_sync(dev);
+
+resubmit:
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+	if (status)
+		dev_err(&intf->dev,
+			"can't resubmit intr, %s-%s/input0, status %d\n",
+			acecad->usbdev->bus->bus_name,
+			acecad->usbdev->devpath, status);
+}
+
+static int usb_acecad_open(struct input_dev *dev)
+{
+	struct usb_acecad *acecad = input_get_drvdata(dev);
+
+	acecad->irq->dev = acecad->usbdev;
+	if (usb_submit_urb(acecad->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void usb_acecad_close(struct input_dev *dev)
+{
+	struct usb_acecad *acecad = input_get_drvdata(dev);
+
+	usb_kill_urb(acecad->irq);
+}
+
+static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_host_interface *interface = intf->cur_altsetting;
+	struct usb_endpoint_descriptor *endpoint;
+	struct usb_acecad *acecad;
+	struct input_dev *input_dev;
+	int pipe, maxp;
+	int err;
+
+	if (interface->desc.bNumEndpoints != 1)
+		return -ENODEV;
+
+	endpoint = &interface->endpoint[0].desc;
+
+	if (!usb_endpoint_is_int_in(endpoint))
+		return -ENODEV;
+
+	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
+	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
+
+	acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
+	input_dev = input_allocate_device();
+	if (!acecad || !input_dev) {
+		err = -ENOMEM;
+		goto fail1;
+	}
+
+	acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
+	if (!acecad->data) {
+		err= -ENOMEM;
+		goto fail1;
+	}
+
+	acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!acecad->irq) {
+		err = -ENOMEM;
+		goto fail2;
+	}
+
+	acecad->usbdev = dev;
+	acecad->intf = intf;
+	acecad->input = input_dev;
+
+	if (dev->manufacturer)
+		strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
+
+	if (dev->product) {
+		if (dev->manufacturer)
+			strlcat(acecad->name, " ", sizeof(acecad->name));
+		strlcat(acecad->name, dev->product, sizeof(acecad->name));
+	}
+
+	usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
+	strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
+
+	input_dev->name = acecad->name;
+	input_dev->phys = acecad->phys;
+	usb_to_input_id(dev, &input_dev->id);
+	input_dev->dev.parent = &intf->dev;
+
+	input_set_drvdata(input_dev, acecad);
+
+	input_dev->open = usb_acecad_open;
+	input_dev->close = usb_acecad_close;
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+	input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
+		BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
+		BIT_MASK(BTN_STYLUS2);
+
+	switch (id->driver_info) {
+	case 0:
+		input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
+		input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
+		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
+		if (!strlen(acecad->name))
+			snprintf(acecad->name, sizeof(acecad->name),
+				"USB Acecad Flair Tablet %04x:%04x",
+				le16_to_cpu(dev->descriptor.idVendor),
+				le16_to_cpu(dev->descriptor.idProduct));
+		break;
+
+	case 1:
+		input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
+		input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
+		input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
+		if (!strlen(acecad->name))
+			snprintf(acecad->name, sizeof(acecad->name),
+				"USB Acecad 302 Tablet %04x:%04x",
+				le16_to_cpu(dev->descriptor.idVendor),
+				le16_to_cpu(dev->descriptor.idProduct));
+		break;
+	}
+
+	usb_fill_int_urb(acecad->irq, dev, pipe,
+			acecad->data, maxp > 8 ? 8 : maxp,
+			usb_acecad_irq, acecad, endpoint->bInterval);
+	acecad->irq->transfer_dma = acecad->data_dma;
+	acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	err = input_register_device(acecad->input);
+	if (err)
+		goto fail3;
+
+	usb_set_intfdata(intf, acecad);
+
+	return 0;
+
+ fail3:	usb_free_urb(acecad->irq);
+ fail2:	usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
+ fail1: input_free_device(input_dev);
+	kfree(acecad);
+	return err;
+}
+
+static void usb_acecad_disconnect(struct usb_interface *intf)
+{
+	struct usb_acecad *acecad = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+
+	input_unregister_device(acecad->input);
+	usb_free_urb(acecad->irq);
+	usb_free_coherent(acecad->usbdev, 8, acecad->data, acecad->data_dma);
+	kfree(acecad);
+}
+
+static struct usb_device_id usb_acecad_id_table [] = {
+	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
+	{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),	 .driver_info = 1 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
+
+static struct usb_driver usb_acecad_driver = {
+	.name =		"usb_acecad",
+	.probe =	usb_acecad_probe,
+	.disconnect =	usb_acecad_disconnect,
+	.id_table =	usb_acecad_id_table,
+};
+
+module_usb_driver(usb_acecad_driver);