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Commit ca2dcd40 authored by Bastien Nocera's avatar Bastien Nocera Committed by Jiri Kosina
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HID: Wacom Graphire Bluetooth driver 



Based on the work by Andrew Zabolotny, an HID driver for the Bluetooth
Wacom tablet. This is required as it uses a slightly different
protocols from what's currently support by the drivers/input/wacom*
driver, and those only support USB.

A user-space patch is required to activate mode 2 of the Wacom tablet,
as hidp does not support hid_output_raw_report.

Signed-off-by: default avatarBastien Nocera <hadess@hadess.net>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 92e0d896

drivers/hid/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -271,6 +271,13 @@ config THRUSTMASTER_FF 
	  Say Y here if you have a THRUSTMASTER FireStore Dual Power 2 or

	  a THRUSTMASTER Ferrari GT Rumble Force or Force Feedback Wheel.



config HID_WACOM

	tristate "Wacom Bluetooth devices support" if EMBEDDED

	depends on BT_HIDP

	default !EMBEDDED

	---help---

	Support for Wacom Graphire Bluetooth tablet.



config ZEROPLUS_FF

	tristate "Zeroplus based game controller support"

	depends on USB_HID

drivers/hid/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ obj-$(CONFIG_GREENASIA_FF) += hid-gaff.o 
obj-$(CONFIG_THRUSTMASTER_FF)	+= hid-tmff.o

obj-$(CONFIG_HID_TOPSEED)	+= hid-topseed.o

obj-$(CONFIG_ZEROPLUS_FF)	+= hid-zpff.o

obj-$(CONFIG_HID_WACOM)		+= hid-wacom.o



obj-$(CONFIG_USB_HID)		+= usbhid/

obj-$(CONFIG_USB_MOUSE)		+= usbhid/

drivers/hid/hid-core.c

+1 −0
Original line number Diff line number Diff line
@@ -1312,6 +1312,7 @@ static const struct hid_device_id hid_blacklist[] = { 
	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651) },

	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654) },

	{ HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED, USB_DEVICE_ID_TOPSEED_CYBERLINK) },

	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },

	{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0005) },

	{ HID_USB_DEVICE(USB_VENDOR_ID_ZEROPLUS, 0x0030) },

drivers/hid/hid-ids.h

+1 −0
Original line number Diff line number Diff line
@@ -414,6 +414,7 @@ 
#define USB_DEVICE_ID_VERNIER_LCSPEC	0x0006



#define USB_VENDOR_ID_WACOM		0x056a

#define USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH	0x81



#define USB_VENDOR_ID_WISEGROUP		0x0925

#define USB_DEVICE_ID_1_PHIDGETSERVO_20	0x8101

drivers/hid/hid-wacom.c

0 → 100644
+259 −0
Original line number Diff line number Diff line 
/*

 *  Bluetooth Wacom Tablet support

 *

 *  Copyright (c) 1999 Andreas Gal

 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>

 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc

 *  Copyright (c) 2006-2007 Jiri Kosina

 *  Copyright (c) 2007 Paul Walmsley

 *  Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com>

 *  Copyright (c) 2006 Andrew Zabolotny <zap@homelink.ru>

 *  Copyright (c) 2009 Bastien Nocera <hadess@hadess.net>

 */



/*

 * 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.

 */



#include <linux/device.h>

#include <linux/hid.h>

#include <linux/module.h>



#include "hid-ids.h"



struct wacom_data {

	__u16 tool;

	unsigned char butstate;

};



static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,

		u8 *raw_data, int size)

{

	struct wacom_data *wdata = hid_get_drvdata(hdev);

	struct hid_input *hidinput;

	struct input_dev *input;

	unsigned char *data = (unsigned char *) raw_data;

	int tool, x, y, rw;



	if (!(hdev->claimed & HID_CLAIMED_INPUT))

		return 0;



	tool = 0;

	hidinput = list_entry(hdev->inputs.next, struct hid_input, list);

	input = hidinput->input;



	/* Check if this is a tablet report */

	if (data[0] != 0x03)

		return 0;



	/* Get X & Y positions */

	x = le16_to_cpu(*(__le16 *) &data[2]);

	y = le16_to_cpu(*(__le16 *) &data[4]);



	/* Get current tool identifier */

	if (data[1] & 0x90) { /* If pen is in the in/active area */

		switch ((data[1] >> 5) & 3) {

		case 0:	/* Pen */

			tool = BTN_TOOL_PEN;

			break;



		case 1: /* Rubber */

			tool = BTN_TOOL_RUBBER;

			break;



		case 2: /* Mouse with wheel */

		case 3: /* Mouse without wheel */

			tool = BTN_TOOL_MOUSE;

			break;

		}



		/* Reset tool if out of active tablet area */

		if (!(data[1] & 0x10))

			tool = 0;

	}



	/* If tool changed, notify input subsystem */

	if (wdata->tool != tool) {

		if (wdata->tool) {

			/* Completely reset old tool state */

			if (wdata->tool == BTN_TOOL_MOUSE) {

				input_report_key(input, BTN_LEFT, 0);

				input_report_key(input, BTN_RIGHT, 0);

				input_report_key(input, BTN_MIDDLE, 0);

				input_report_abs(input, ABS_DISTANCE,

						input->absmax[ABS_DISTANCE]);

			} else {

				input_report_key(input, BTN_TOUCH, 0);

				input_report_key(input, BTN_STYLUS, 0);

				input_report_key(input, BTN_STYLUS2, 0);

				input_report_abs(input, ABS_PRESSURE, 0);

			}

			input_report_key(input, wdata->tool, 0);

			input_sync(input);

		}

		wdata->tool = tool;

		if (tool)

			input_report_key(input, tool, 1);

	}



	if (tool) {

		input_report_abs(input, ABS_X, x);

		input_report_abs(input, ABS_Y, y);



		switch ((data[1] >> 5) & 3) {

		case 2: /* Mouse with wheel */

			input_report_key(input, BTN_MIDDLE, data[1] & 0x04);

			rw = (data[6] & 0x01) ? -1 :

				(data[6] & 0x02) ? 1 : 0;

			input_report_rel(input, REL_WHEEL, rw);

			/* fall through */



		case 3: /* Mouse without wheel */

			input_report_key(input, BTN_LEFT, data[1] & 0x01);

			input_report_key(input, BTN_RIGHT, data[1] & 0x02);

			/* Compute distance between mouse and tablet */

			rw = 44 - (data[6] >> 2);

			if (rw < 0)

				rw = 0;

			else if (rw > 31)

				rw = 31;

			input_report_abs(input, ABS_DISTANCE, rw);

			break;



		default:

			input_report_abs(input, ABS_PRESSURE,

					data[6] | (((__u16) (data[1] & 0x08)) << 5));

			input_report_key(input, BTN_TOUCH, data[1] & 0x01);

			input_report_key(input, BTN_STYLUS, data[1] & 0x02);

			input_report_key(input, BTN_STYLUS2, (tool == BTN_TOOL_PEN) && data[1] & 0x04);

			break;

		}



		input_sync(input);

	}



	/* Report the state of the two buttons at the top of the tablet

	 * as two extra fingerpad keys (buttons 4 & 5). */

	rw = data[7] & 0x03;

	if (rw != wdata->butstate) {

		wdata->butstate = rw;

		input_report_key(input, BTN_0, rw & 0x02);

		input_report_key(input, BTN_1, rw & 0x01);

		input_event(input, EV_MSC, MSC_SERIAL, 0xf0);

		input_sync(input);

	}



	return 1;

}



static int wacom_probe(struct hid_device *hdev,

		const struct hid_device_id *id)

{

	struct hid_input *hidinput;

	struct input_dev *input;

	struct wacom_data *wdata;

	int ret;



	wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);

	if (wdata == NULL) {

		dev_err(&hdev->dev, "can't alloc wacom descriptor\n");

		return -ENOMEM;

	}



	hid_set_drvdata(hdev, wdata);



	ret = hid_parse(hdev);

	if (ret) {

		dev_err(&hdev->dev, "parse failed\n");

		goto err_free;

	}



	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);

	if (ret) {

		dev_err(&hdev->dev, "hw start failed\n");

		goto err_free;

	}



	hidinput = list_entry(hdev->inputs.next, struct hid_input, list);

	input = hidinput->input;



	/* Basics */

	input->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_REL);

	input->absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) |

		BIT(ABS_PRESSURE) | BIT(ABS_DISTANCE);

	input->relbit[0] |= BIT(REL_WHEEL);

	set_bit(BTN_TOOL_PEN, input->keybit);

	set_bit(BTN_TOUCH, input->keybit);

	set_bit(BTN_STYLUS, input->keybit);

	set_bit(BTN_STYLUS2, input->keybit);

	set_bit(BTN_LEFT, input->keybit);

	set_bit(BTN_RIGHT, input->keybit);

	set_bit(BTN_MIDDLE, input->keybit);



	/* Pad */

	input->evbit[0] |= BIT(EV_MSC);

	input->mscbit[0] |= BIT(MSC_SERIAL);



	/* Distance, rubber and mouse */

	input->absbit[0] |= BIT(ABS_DISTANCE);

	set_bit(BTN_TOOL_RUBBER, input->keybit);

	set_bit(BTN_TOOL_MOUSE, input->keybit);



	input->absmax[ABS_PRESSURE] = 511;

	input->absmax[ABS_DISTANCE] = 32;



	input->absmax[ABS_X] = 16704;

	input->absmax[ABS_Y] = 12064;

	input->absfuzz[ABS_X] = 4;

	input->absfuzz[ABS_Y] = 4;



	return 0;

err_free:

	kfree(wdata);

	return ret;

}



static void wacom_remove(struct hid_device *hdev)

{

	hid_hw_stop(hdev);

	kfree(hid_get_drvdata(hdev));

}



static const struct hid_device_id wacom_devices[] = {

	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_GRAPHIRE_BLUETOOTH) },



	{ }

};

MODULE_DEVICE_TABLE(hid, wacom_devices);



static struct hid_driver wacom_driver = {

	.name = "wacom",

	.id_table = wacom_devices,

	.probe = wacom_probe,

	.remove = wacom_remove,

	.raw_event = wacom_raw_event,

};



static int wacom_init(void)

{

	int ret;



	ret = hid_register_driver(&wacom_driver);

	if (ret)

		printk(KERN_ERR "can't register wacom driver\n");

	printk(KERN_ERR "wacom driver registered\n");

	return ret;

}



static void wacom_exit(void)

{

	hid_unregister_driver(&wacom_driver);

}



module_init(wacom_init);

module_exit(wacom_exit);

MODULE_LICENSE("GPL");