drivers/usb/input/touchkitusb.c - linux/kernel/git/mellanox/linux - Git at Google

 /******************************************************************************
  * touchkitusb.c  --  Driver for eGalax TouchKit USB Touchscreens
  *
  * Copyright (C) 2004 by Daniel Ritz
  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  *
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  * Based upon mtouchusb.c
  *
  *****************************************************************************/

 //#define DEBUG

 #include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/input.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/usb.h>
 #include <linux/usb_input.h>

 #define TOUCHKIT_MIN_XC			0x0
 #define TOUCHKIT_MAX_XC			0x07ff
 #define TOUCHKIT_XC_FUZZ		0x0
 #define TOUCHKIT_XC_FLAT		0x0
 #define TOUCHKIT_MIN_YC			0x0
 #define TOUCHKIT_MAX_YC			0x07ff
 #define TOUCHKIT_YC_FUZZ		0x0
 #define TOUCHKIT_YC_FLAT		0x0
 #define TOUCHKIT_REPORT_DATA_SIZE	8

 #define TOUCHKIT_DOWN			0x01
 #define TOUCHKIT_POINT_TOUCH		0x81
 #define TOUCHKIT_POINT_NOTOUCH		0x80

 #define TOUCHKIT_GET_TOUCHED(dat)	((((dat)[0]) & TOUCHKIT_DOWN) ? 1 : 0)
 #define TOUCHKIT_GET_X(dat)		(((dat)[3] << 7) | (dat)[4])
 #define TOUCHKIT_GET_Y(dat)		(((dat)[1] << 7) | (dat)[2])

 #define DRIVER_VERSION			"v0.1"
 #define DRIVER_AUTHOR			"Daniel Ritz <daniel.ritz@gmx.ch>"
 #define DRIVER_DESC			"eGalax TouchKit USB HID Touchscreen Driver"

 static int swap_xy;
 module_param(swap_xy, bool, 0644);
 MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");

 struct touchkit_usb {
 	unsigned char *data;
 	dma_addr_t data_dma;
 	struct urb *irq;
 	struct usb_device *udev;
 	struct input_dev *input;
 	char name[128];
 	char phys[64];
 };

 static struct usb_device_id touchkit_devices[] = {
 	{USB_DEVICE(0x3823, 0x0001)},
 	{USB_DEVICE(0x0123, 0x0001)},
 	{USB_DEVICE(0x0eef, 0x0001)},
 	{USB_DEVICE(0x0eef, 0x0002)},
 	{}
 };

 static void touchkit_irq(struct urb *urb, struct pt_regs *regs)
 {
 	struct touchkit_usb *touchkit = urb->context;
 	int retval;
 	int x, y;

 	switch (urb->status) {
 	case 0:
 		/* success */
 		break;
 	case -ETIMEDOUT:
 		/* this urb is timing out */
 		dbg("%s - urb timed out - was the device unplugged?",
 		    __FUNCTION__);
 		return;
 	case -ECONNRESET:
 	case -ENOENT:
 	case -ESHUTDOWN:
 		/* this urb is terminated, clean up */
 		dbg("%s - urb shutting down with status: %d",
 		    __FUNCTION__, urb->status);
 		return;
 	default:
 		dbg("%s - nonzero urb status received: %d",
 		    __FUNCTION__, urb->status);
 		goto exit;
 	}

 	if (swap_xy) {
 		y = TOUCHKIT_GET_X(touchkit->data);
 		x = TOUCHKIT_GET_Y(touchkit->data);
 	} else {
 		x = TOUCHKIT_GET_X(touchkit->data);
 		y = TOUCHKIT_GET_Y(touchkit->data);
 	}

 	input_regs(touchkit->input, regs);
 	input_report_key(touchkit->input, BTN_TOUCH,
 	                 TOUCHKIT_GET_TOUCHED(touchkit->data));
 	input_report_abs(touchkit->input, ABS_X, x);
 	input_report_abs(touchkit->input, ABS_Y, y);
 	input_sync(touchkit->input);

 exit:
 	retval = usb_submit_urb(urb, GFP_ATOMIC);
 	if (retval)
 		err("%s - usb_submit_urb failed with result: %d",
 		    __FUNCTION__, retval);
 }

 static int touchkit_open(struct input_dev *input)
 {
 	struct touchkit_usb *touchkit = input->private;

 	touchkit->irq->dev = touchkit->udev;

 	if (usb_submit_urb(touchkit->irq, GFP_ATOMIC))
 		return -EIO;

 	return 0;
 }

 static void touchkit_close(struct input_dev *input)
 {
 	struct touchkit_usb *touchkit = input->private;

 	usb_kill_urb(touchkit->irq);
 }

 static int touchkit_alloc_buffers(struct usb_device *udev,
 				  struct touchkit_usb *touchkit)
 {
 	touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
 	                                  SLAB_ATOMIC, &touchkit->data_dma);

 	if (!touchkit->data)
 		return -1;

 	return 0;
 }

 static void touchkit_free_buffers(struct usb_device *udev,
 				  struct touchkit_usb *touchkit)
 {
 	if (touchkit->data)
 		usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
 		                touchkit->data, touchkit->data_dma);
 }

 static int touchkit_probe(struct usb_interface *intf,
 			  const struct usb_device_id *id)
 {
 	struct touchkit_usb *touchkit;
 	struct input_dev *input_dev;
 	struct usb_host_interface *interface;
 	struct usb_endpoint_descriptor *endpoint;
 	struct usb_device *udev = interface_to_usbdev(intf);

 	interface = intf->cur_altsetting;
 	endpoint = &interface->endpoint[0].desc;

 	touchkit = kzalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
 	input_dev = input_allocate_device();
 	if (!touchkit || !input_dev)
 		goto out_free;

 	if (touchkit_alloc_buffers(udev, touchkit))
 		goto out_free;

 	touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
 	if (!touchkit->irq) {
 		dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
 		goto out_free_buffers;
 	}

 	touchkit->udev = udev;
 	touchkit->input = input_dev;

 	if (udev->manufacturer)
 		strlcpy(touchkit->name, udev->manufacturer, sizeof(touchkit->name));

 	if (udev->product) {
 		if (udev->manufacturer)
 			strlcat(touchkit->name, " ", sizeof(touchkit->name));
 		strlcat(touchkit->name, udev->product, sizeof(touchkit->name));
 	}

 	if (!strlen(touchkit->name))
 		snprintf(touchkit->name, sizeof(touchkit->name),
 			"USB Touchscreen %04x:%04x",
 			 le16_to_cpu(udev->descriptor.idVendor),
 			 le16_to_cpu(udev->descriptor.idProduct));

 	usb_make_path(udev, touchkit->phys, sizeof(touchkit->phys));
 	strlcpy(touchkit->phys, "/input0", sizeof(touchkit->phys));

 	input_dev->name = touchkit->name;
 	input_dev->phys = touchkit->phys;
 	usb_to_input_id(udev, &input_dev->id);
 	input_dev->cdev.dev = &intf->dev;
 	input_dev->private = touchkit;
 	input_dev->open = touchkit_open;
 	input_dev->close = touchkit_close;

 	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
 	input_set_abs_params(input_dev, ABS_X, TOUCHKIT_MIN_XC, TOUCHKIT_MAX_XC,
 				TOUCHKIT_XC_FUZZ, TOUCHKIT_XC_FLAT);
 	input_set_abs_params(input_dev, ABS_Y, TOUCHKIT_MIN_YC, TOUCHKIT_MAX_YC,
 				TOUCHKIT_YC_FUZZ, TOUCHKIT_YC_FLAT);

 	usb_fill_int_urb(touchkit->irq, touchkit->udev,
 			 usb_rcvintpipe(touchkit->udev, 0x81),
 			 touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
 			 touchkit_irq, touchkit, endpoint->bInterval);

 	input_register_device(touchkit->input);

 	usb_set_intfdata(intf, touchkit);
 	return 0;

 out_free_buffers:
 	touchkit_free_buffers(udev, touchkit);
 out_free:
 	input_free_device(input_dev);
 	kfree(touchkit);
 	return -ENOMEM;
 }

 static void touchkit_disconnect(struct usb_interface *intf)
 {
 	struct touchkit_usb *touchkit = usb_get_intfdata(intf);

 	dbg("%s - called", __FUNCTION__);

 	if (!touchkit)
 		return;

 	dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
 	usb_set_intfdata(intf, NULL);
 	usb_kill_urb(touchkit->irq);
 	input_unregister_device(touchkit->input);
 	usb_free_urb(touchkit->irq);
 	touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
 	kfree(touchkit);
 }

 MODULE_DEVICE_TABLE(usb, touchkit_devices);

 static struct usb_driver touchkit_driver = {
 	.owner		= THIS_MODULE,
 	.name		= "touchkitusb",
 	.probe		= touchkit_probe,
 	.disconnect	= touchkit_disconnect,
 	.id_table	= touchkit_devices,
 };

 static int __init touchkit_init(void)
 {
 	return usb_register(&touchkit_driver);
 }

 static void __exit touchkit_cleanup(void)
 {
 	usb_deregister(&touchkit_driver);
 }

 module_init(touchkit_init);
 module_exit(touchkit_cleanup);

 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
	/******************************************************************************
	* touchkitusb.c -- Driver for eGalax TouchKit USB Touchscreens
	*
	* Copyright (C) 2004 by Daniel Ritz
	* Copyright (C) by Todd E. Johnson (mtouchusb.c)
	*
	* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	* Based upon mtouchusb.c
	*
	*****************************************************************************/

	//#define DEBUG

	#include <linux/config.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/input.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/usb.h>
	#include <linux/usb_input.h>

	#define TOUCHKIT_MIN_XC 0x0
	#define TOUCHKIT_MAX_XC 0x07ff
	#define TOUCHKIT_XC_FUZZ 0x0
	#define TOUCHKIT_XC_FLAT 0x0
	#define TOUCHKIT_MIN_YC 0x0
	#define TOUCHKIT_MAX_YC 0x07ff
	#define TOUCHKIT_YC_FUZZ 0x0
	#define TOUCHKIT_YC_FLAT 0x0
	#define TOUCHKIT_REPORT_DATA_SIZE 8

	#define TOUCHKIT_DOWN 0x01
	#define TOUCHKIT_POINT_TOUCH 0x81
	#define TOUCHKIT_POINT_NOTOUCH 0x80

	#define TOUCHKIT_GET_TOUCHED(dat) ((((dat)[0]) & TOUCHKIT_DOWN) ? 1 : 0)
	#define TOUCHKIT_GET_X(dat) (((dat)[3] << 7) \| (dat)[4])
	#define TOUCHKIT_GET_Y(dat) (((dat)[1] << 7) \| (dat)[2])

	#define DRIVER_VERSION "v0.1"
	#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
	#define DRIVER_DESC "eGalax TouchKit USB HID Touchscreen Driver"

	static int swap_xy;
	module_param(swap_xy, bool, 0644);
	MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");

	struct touchkit_usb {
	unsigned char *data;
	dma_addr_t data_dma;
	struct urb *irq;
	struct usb_device *udev;
	struct input_dev *input;
	char name[128];
	char phys[64];
	};

	static struct usb_device_id touchkit_devices[] = {
	{USB_DEVICE(0x3823, 0x0001)},
	{USB_DEVICE(0x0123, 0x0001)},
	{USB_DEVICE(0x0eef, 0x0001)},
	{USB_DEVICE(0x0eef, 0x0002)},
	{}
	};

	static void touchkit_irq(struct urb urb, struct pt_regs regs)
	{
	struct touchkit_usb *touchkit = urb->context;
	int retval;
	int x, y;

	switch (urb->status) {
	case 0:
	/* success */
	break;
	case -ETIMEDOUT:
	/* this urb is timing out */
	dbg("%s - urb timed out - was the device unplugged?",
	__FUNCTION__);
	return;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
	/* this urb is terminated, clean up */
	dbg("%s - urb shutting down with status: %d",
	__FUNCTION__, urb->status);
	return;
	default:
	dbg("%s - nonzero urb status received: %d",
	__FUNCTION__, urb->status);
	goto exit;
	}

	if (swap_xy) {
	y = TOUCHKIT_GET_X(touchkit->data);
	x = TOUCHKIT_GET_Y(touchkit->data);
	} else {
	x = TOUCHKIT_GET_X(touchkit->data);
	y = TOUCHKIT_GET_Y(touchkit->data);
	}

	input_regs(touchkit->input, regs);
	input_report_key(touchkit->input, BTN_TOUCH,
	TOUCHKIT_GET_TOUCHED(touchkit->data));
	input_report_abs(touchkit->input, ABS_X, x);
	input_report_abs(touchkit->input, ABS_Y, y);
	input_sync(touchkit->input);

	exit:
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
	err("%s - usb_submit_urb failed with result: %d",
	__FUNCTION__, retval);
	}

	static int touchkit_open(struct input_dev *input)
	{
	struct touchkit_usb *touchkit = input->private;

	touchkit->irq->dev = touchkit->udev;

	if (usb_submit_urb(touchkit->irq, GFP_ATOMIC))
	return -EIO;

	return 0;
	}

	static void touchkit_close(struct input_dev *input)
	{
	struct touchkit_usb *touchkit = input->private;

	usb_kill_urb(touchkit->irq);
	}

	static int touchkit_alloc_buffers(struct usb_device *udev,
	struct touchkit_usb *touchkit)
	{
	touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
	SLAB_ATOMIC, &touchkit->data_dma);

	if (!touchkit->data)
	return -1;

	return 0;
	}

	static void touchkit_free_buffers(struct usb_device *udev,
	struct touchkit_usb *touchkit)
	{
	if (touchkit->data)
	usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
	touchkit->data, touchkit->data_dma);
	}

	static int touchkit_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	struct touchkit_usb *touchkit;
	struct input_dev *input_dev;
	struct usb_host_interface *interface;
	struct usb_endpoint_descriptor *endpoint;
	struct usb_device *udev = interface_to_usbdev(intf);

	interface = intf->cur_altsetting;
	endpoint = &interface->endpoint[0].desc;

	touchkit = kzalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!touchkit \|\| !input_dev)
	goto out_free;

	if (touchkit_alloc_buffers(udev, touchkit))
	goto out_free;

	touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
	if (!touchkit->irq) {
	dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
	goto out_free_buffers;
	}

	touchkit->udev = udev;
	touchkit->input = input_dev;

	if (udev->manufacturer)
	strlcpy(touchkit->name, udev->manufacturer, sizeof(touchkit->name));

	if (udev->product) {
	if (udev->manufacturer)
	strlcat(touchkit->name, " ", sizeof(touchkit->name));
	strlcat(touchkit->name, udev->product, sizeof(touchkit->name));
	}

	if (!strlen(touchkit->name))
	snprintf(touchkit->name, sizeof(touchkit->name),
	"USB Touchscreen %04x:%04x",
	le16_to_cpu(udev->descriptor.idVendor),
	le16_to_cpu(udev->descriptor.idProduct));

	usb_make_path(udev, touchkit->phys, sizeof(touchkit->phys));
	strlcpy(touchkit->phys, "/input0", sizeof(touchkit->phys));

	input_dev->name = touchkit->name;
	input_dev->phys = touchkit->phys;
	usb_to_input_id(udev, &input_dev->id);
	input_dev->cdev.dev = &intf->dev;
	input_dev->private = touchkit;
	input_dev->open = touchkit_open;
	input_dev->close = touchkit_close;

	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
	input_set_abs_params(input_dev, ABS_X, TOUCHKIT_MIN_XC, TOUCHKIT_MAX_XC,
	TOUCHKIT_XC_FUZZ, TOUCHKIT_XC_FLAT);
	input_set_abs_params(input_dev, ABS_Y, TOUCHKIT_MIN_YC, TOUCHKIT_MAX_YC,
	TOUCHKIT_YC_FUZZ, TOUCHKIT_YC_FLAT);

	usb_fill_int_urb(touchkit->irq, touchkit->udev,
	usb_rcvintpipe(touchkit->udev, 0x81),
	touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
	touchkit_irq, touchkit, endpoint->bInterval);

	input_register_device(touchkit->input);

	usb_set_intfdata(intf, touchkit);
	return 0;

	out_free_buffers:
	touchkit_free_buffers(udev, touchkit);
	out_free:
	input_free_device(input_dev);
	kfree(touchkit);
	return -ENOMEM;
	}

	static void touchkit_disconnect(struct usb_interface *intf)
	{
	struct touchkit_usb *touchkit = usb_get_intfdata(intf);

	dbg("%s - called", __FUNCTION__);

	if (!touchkit)
	return;

	dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
	usb_set_intfdata(intf, NULL);
	usb_kill_urb(touchkit->irq);
	input_unregister_device(touchkit->input);
	usb_free_urb(touchkit->irq);
	touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
	kfree(touchkit);
	}

	MODULE_DEVICE_TABLE(usb, touchkit_devices);

	static struct usb_driver touchkit_driver = {
	.owner = THIS_MODULE,
	.name = "touchkitusb",
	.probe = touchkit_probe,
	.disconnect = touchkit_disconnect,
	.id_table = touchkit_devices,
	};

	static int __init touchkit_init(void)
	{
	return usb_register(&touchkit_driver);
	}

	static void __exit touchkit_cleanup(void)
	{
	usb_deregister(&touchkit_driver);
	}

	module_init(touchkit_init);
	module_exit(touchkit_cleanup);

	MODULE_AUTHOR(DRIVER_AUTHOR);
	MODULE_DESCRIPTION(DRIVER_DESC);
	MODULE_LICENSE("GPL");