[mirror_ubuntu-artful-kernel.git] / drivers / hid / hid-elecom.c

/*
 *  HID driver for ELECOM devices.
 *  Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
 *  Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
 *  Copyright (c) 2017 Diego Elio Pettenò <flameeyes@flameeyes.eu>
 *  Copyright (c) 2017 Alex Manoussakis <amanou@gnu.org>
 */

/*
 * 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"

static __u8 *elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	switch (hdev->product) {
	case USB_DEVICE_ID_ELECOM_BM084:
		/* The BM084 Bluetooth mouse includes a non-existing horizontal
		 * wheel in the HID descriptor. */
		if (*rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
			hid_info(hdev, "Fixing up Elecom BM084 report descriptor\n");
			rdesc[47] = 0x00;
		}
		break;
	case USB_DEVICE_ID_ELECOM_DEFT_WIRED:
	case USB_DEVICE_ID_ELECOM_DEFT_WIRELESS:
	case USB_DEVICE_ID_ELECOM_HUGE_WIRED:
	case USB_DEVICE_ID_ELECOM_HUGE_WIRELESS:
		/* The DEFT/HUGE trackball has eight buttons, but its descriptor
		 * only reports five, disabling the three Fn buttons on the top
		 * of the mouse.
		 *
		 * Apply the following diff to the descriptor:
		 *
		 * Collection (Physical),              Collection (Physical),
		 *     Report ID (1),                      Report ID (1),
		 *     Report Count (5),           ->      Report Count (8),
		 *     Report Size (1),                    Report Size (1),
		 *     Usage Page (Button),                Usage Page (Button),
		 *     Usage Minimum (01h),                Usage Minimum (01h),
		 *     Usage Maximum (05h),        ->      Usage Maximum (08h),
		 *     Logical Minimum (0),                Logical Minimum (0),
		 *     Logical Maximum (1),                Logical Maximum (1),
		 *     Input (Variable),                   Input (Variable),
		 *     Report Count (1),           ->      Report Count (0),
		 *     Report Size (3),                    Report Size (3),
		 *     Input (Constant),                   Input (Constant),
		 *     Report Size (16),                   Report Size (16),
		 *     Report Count (2),                   Report Count (2),
		 *     Usage Page (Desktop),               Usage Page (Desktop),
		 *     Usage (X),                          Usage (X),
		 *     Usage (Y),                          Usage (Y),
		 *     Logical Minimum (-32768),           Logical Minimum (-32768),
		 *     Logical Maximum (32767),            Logical Maximum (32767),
		 *     Input (Variable, Relative),         Input (Variable, Relative),
		 * End Collection,                     End Collection,
		 */
		if (*rsize == 213 && rdesc[13] == 5 && rdesc[21] == 5) {
			hid_info(hdev, "Fixing up Elecom DEFT/HUGE Fn buttons\n");
			rdesc[13] = 8; /* Button/Variable Report Count */
			rdesc[21] = 8; /* Button/Variable Usage Maximum */
			rdesc[29] = 0; /* Button/Constant Report Count */
		}
		break;
	}
	return rdesc;
}

static const struct hid_device_id elecom_devices[] = {
	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_DEFT_WIRED) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_DEFT_WIRELESS) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_HUGE_WIRED) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_HUGE_WIRELESS) },
	{ }
};
MODULE_DEVICE_TABLE(hid, elecom_devices);

static struct hid_driver elecom_driver = {
	.name = "elecom",
	.id_table = elecom_devices,
	.report_fixup = elecom_report_fixup
};
module_hid_driver(elecom_driver);

MODULE_LICENSE("GPL");
Commit	Line	Data
64b386ea	1	/*
0bb7a37f	2	* HID driver for ELECOM devices.
64b386ea	3	* Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
0bb7a37f DEP	4	* Copyright (c) 2016 Yuxuan Shui <yshuiv7@gmail.com>
0bb7a37f DEP	5	* Copyright (c) 2017 Diego Elio Pettenò <flameeyes@flameeyes.eu>
56c7e2e2	6	* Copyright (c) 2017 Alex Manoussakis <amanou@gnu.org>
64b386ea RN	7	*/
	8
	9	/*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the Free
	12	* Software Foundation; either version 2 of the License, or (at your option)
	13	* any later version.
	14	*/
	15
	16	#include <linux/device.h>
	17	#include <linux/hid.h>
	18	#include <linux/module.h>
	19
	20	#include "hid-ids.h"
	21
73e4008d NK	22	static __u8 elecom_report_fixup(struct hid_device hdev, __u8 *rdesc,
73e4008d NK	23	unsigned int *rsize)
64b386ea	24	{
0bb7a37f DEP	25	switch (hdev->product) {
	26	case USB_DEVICE_ID_ELECOM_BM084:
	27	/* The BM084 Bluetooth mouse includes a non-existing horizontal
	28	* wheel in the HID descriptor. */
	29	if (*rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
	30	hid_info(hdev, "Fixing up Elecom BM084 report descriptor\n");
	31	rdesc[47] = 0x00;
	32	}
	33	break;
	34	case USB_DEVICE_ID_ELECOM_DEFT_WIRED:
	35	case USB_DEVICE_ID_ELECOM_DEFT_WIRELESS:
56c7e2e2 AM	36	case USB_DEVICE_ID_ELECOM_HUGE_WIRED:
	37	case USB_DEVICE_ID_ELECOM_HUGE_WIRELESS:
	38	/* The DEFT/HUGE trackball has eight buttons, but its descriptor
	39	* only reports five, disabling the three Fn buttons on the top
	40	* of the mouse.
0bb7a37f DEP	41	*
	42	* Apply the following diff to the descriptor:
	43	*
	44	* Collection (Physical), Collection (Physical),
	45	* Report ID (1), Report ID (1),
	46	* Report Count (5), -> Report Count (8),
	47	* Report Size (1), Report Size (1),
	48	* Usage Page (Button), Usage Page (Button),
	49	* Usage Minimum (01h), Usage Minimum (01h),
	50	* Usage Maximum (05h), -> Usage Maximum (08h),
	51	* Logical Minimum (0), Logical Minimum (0),
	52	* Logical Maximum (1), Logical Maximum (1),
	53	* Input (Variable), Input (Variable),
	54	* Report Count (1), -> Report Count (0),
	55	* Report Size (3), Report Size (3),
	56	* Input (Constant), Input (Constant),
	57	* Report Size (16), Report Size (16),
	58	* Report Count (2), Report Count (2),
	59	* Usage Page (Desktop), Usage Page (Desktop),
	60	* Usage (X), Usage (X),
	61	* Usage (Y), Usage (Y),
	62	* Logical Minimum (-32768), Logical Minimum (-32768),
	63	* Logical Maximum (32767), Logical Maximum (32767),
	64	* Input (Variable, Relative), Input (Variable, Relative),
	65	* End Collection, End Collection,
	66	*/
	67	if (*rsize == 213 && rdesc[13] == 5 && rdesc[21] == 5) {
56c7e2e2	68	hid_info(hdev, "Fixing up Elecom DEFT/HUGE Fn buttons\n");
0bb7a37f DEP	69	rdesc[13] = 8; /* Button/Variable Report Count */
	70	rdesc[21] = 8; /* Button/Variable Usage Maximum */
	71	rdesc[29] = 0; /* Button/Constant Report Count */
	72	}
	73	break;
64b386ea	74	}
636a89d4	75	return rdesc;
64b386ea RN	76	}
	77
	78	static const struct hid_device_id elecom_devices[] = {
0bb7a37f DEP	79	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
	80	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_DEFT_WIRED) },
	81	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_DEFT_WIRELESS) },
56c7e2e2 AM	82	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_HUGE_WIRED) },
56c7e2e2 AM	83	{ HID_USB_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_HUGE_WIRELESS) },
64b386ea RN	84	{ }
	85	};
	86	MODULE_DEVICE_TABLE(hid, elecom_devices);
	87
	88	static struct hid_driver elecom_driver = {
	89	.name = "elecom",
	90	.id_table = elecom_devices,
	91	.report_fixup = elecom_report_fixup
	92	};
f425458e	93	module_hid_driver(elecom_driver);
64b386ea	94
64b386ea	95	MODULE_LICENSE("GPL");