path: root/drivers/hid/hid-logitech-dj.c

/*
 *  HID driver for Logitech Unifying receivers
 *
 *  Copyright (c) 2011 Logitech
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 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
 *
 */


#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/kfifo.h>
#include <asm/unaligned.h>
#include "hid-ids.h"

#define DJ_MAX_PAIRED_DEVICES			6
#define DJ_MAX_NUMBER_NOTIFICATIONS		8
#define DJ_RECEIVER_INDEX			0
#define DJ_DEVICE_INDEX_MIN			1
#define DJ_DEVICE_INDEX_MAX			6

#define DJREPORT_SHORT_LENGTH			15
#define DJREPORT_LONG_LENGTH			32

#define REPORT_ID_DJ_SHORT			0x20
#define REPORT_ID_DJ_LONG			0x21

#define REPORT_ID_HIDPP_SHORT			0x10
#define REPORT_ID_HIDPP_LONG			0x11

#define HIDPP_REPORT_SHORT_LENGTH		7
#define HIDPP_REPORT_LONG_LENGTH		20

#define HIDPP_RECEIVER_INDEX			0xff

#define REPORT_TYPE_RFREPORT_FIRST		0x01
#define REPORT_TYPE_RFREPORT_LAST		0x1F

/* Command Switch to DJ mode */
#define REPORT_TYPE_CMD_SWITCH			0x80
#define CMD_SWITCH_PARAM_DEVBITFIELD		0x00
#define CMD_SWITCH_PARAM_TIMEOUT_SECONDS	0x01
#define TIMEOUT_NO_KEEPALIVE			0x00

/* Command to Get the list of Paired devices */
#define REPORT_TYPE_CMD_GET_PAIRED_DEVICES	0x81

/* Device Paired Notification */
#define REPORT_TYPE_NOTIF_DEVICE_PAIRED		0x41
#define SPFUNCTION_MORE_NOTIF_EXPECTED		0x01
#define SPFUNCTION_DEVICE_LIST_EMPTY		0x02
#define DEVICE_PAIRED_PARAM_SPFUNCTION		0x00
#define DEVICE_PAIRED_PARAM_EQUAD_ID_LSB	0x01
#define DEVICE_PAIRED_PARAM_EQUAD_ID_MSB	0x02
#define DEVICE_PAIRED_RF_REPORT_TYPE		0x03

/* Device Un-Paired Notification */
#define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED	0x40


/* Connection Status Notification */
#define REPORT_TYPE_NOTIF_CONNECTION_STATUS	0x42
#define CONNECTION_STATUS_PARAM_STATUS		0x00
#define STATUS_LINKLOSS				0x01

/* Error Notification */
#define REPORT_TYPE_NOTIF_ERROR			0x7F
#define NOTIF_ERROR_PARAM_ETYPE			0x00
#define ETYPE_KEEPALIVE_TIMEOUT			0x01

/* supported DJ HID && RF report types */
#define REPORT_TYPE_KEYBOARD			0x01
#define REPORT_TYPE_MOUSE			0x02
#define REPORT_TYPE_CONSUMER_CONTROL		0x03
#define REPORT_TYPE_SYSTEM_CONTROL		0x04
#define REPORT_TYPE_MEDIA_CENTER		0x08
#define REPORT_TYPE_LEDS			0x0E

/* RF Report types bitfield */
#define STD_KEYBOARD				0x00000002
#define STD_MOUSE				0x00000004
#define MULTIMEDIA				0x00000008
#define POWER_KEYS				0x00000010
#define MEDIA_CENTER				0x00000100
#define KBD_LEDS				0x00004000

struct dj_report {
	u8 report_id;
	u8 device_index;
	u8 report_type;
	u8 report_params[DJREPORT_SHORT_LENGTH - 3];
};

struct dj_receiver_dev {
	struct hid_device *hdev;
	struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES +
					    DJ_DEVICE_INDEX_MIN];
	struct work_struct work;
	struct kfifo notif_fifo;
	spinlock_t lock;
	bool querying_devices;
};

struct dj_device {
	struct hid_device *hdev;
	struct dj_receiver_dev *dj_receiver_dev;
	u32 reports_supported;
	u8 device_index;
};

/* Keyboard descriptor (1) */
static const char kbd_descriptor[] = {
	0x05, 0x01,		/* USAGE_PAGE (generic Desktop)     */
	0x09, 0x06,		/* USAGE (Keyboard)         */
	0xA1, 0x01,		/* COLLECTION (Application)     */
	0x85, 0x01,		/* REPORT_ID (1)            */
	0x95, 0x08,		/*   REPORT_COUNT (8)           */
	0x75, 0x01,		/*   REPORT_SIZE (1)            */
	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
	0x25, 0x01,		/*   LOGICAL_MAXIMUM (1)        */
	0x05, 0x07,		/*   USAGE_PAGE (Keyboard)      */
	0x19, 0xE0,		/*   USAGE_MINIMUM (Left Control)   */
	0x29, 0xE7,		/*   USAGE_MAXIMUM (Right GUI)      */
	0x81, 0x02,		/*   INPUT (Data,Var,Abs)       */
	0x95, 0x06,		/*   REPORT_COUNT (6)           */
	0x75, 0x08,		/*   REPORT_SIZE (8)            */
	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
	0x26, 0xFF, 0x00,	/*   LOGICAL_MAXIMUM (255)      */
	0x05, 0x07,		/*   USAGE_PAGE (Keyboard)      */
	0x19, 0x00,		/*   USAGE_MINIMUM (no event)       */
	0x2A, 0xFF, 0x00,	/*   USAGE_MAXIMUM (reserved)       */
	0x81, 0x00,		/*   INPUT (Data,Ary,Abs)       */
	0x85, 0x0e,		/* REPORT_ID (14)               */
	0x05, 0x08,		/*   USAGE PAGE (LED page)      */
	0x95, 0x05,		/*   REPORT COUNT (5)           */
	0x75, 0x01,		/*   REPORT SIZE (1)            */
	0x15, 0x00,		/*   LOGICAL_MINIMUM (0)        */
	0x25, 0x01,		/*   LOGICAL_MAXIMUM (1)        */
	0x19, 0x01,		/*   USAGE MINIMUM (1)          */
	0x29, 0x05,		/*   USAGE MAXIMUM (5)          */
	0x91, 0x02,		/*   OUTPUT (Data, Variable, Absolute)  */
	0x95, 0x01,		/*   REPORT COUNT (1)           */
	0x75, 0x03,		/*   REPORT SIZE (3)            */
	0x91, 0x01,		/*   OUTPUT (Constant)          */
	0xC0
};

/* Mouse descriptor (2)     */
static const