path: root/drivers/media/rc/mceusb.c

/*
 * Driver for USB Windows Media Center Ed. eHome Infrared Transceivers
 *
 * Copyright (c) 2010 by Jarod Wilson <jarod@redhat.com>
 *
 * Based on the original lirc_mceusb and lirc_mceusb2 drivers, by Dan
 * Conti, Martin Blatter and Daniel Melander, the latter of which was
 * in turn also based on the lirc_atiusb driver by Paul Miller. The
 * two mce drivers were merged into one by Jarod Wilson, with transmit
 * support for the 1st-gen device added primarily by Patrick Calhoun,
 * with a bit of tweaks by Jarod. Debugging improvements and proper
 * support for what appears to be 3rd-gen hardware added by Jarod.
 * Initial port from lirc driver to ir-core drivery by Jarod, based
 * partially on a port to an earlier proposed IR infrastructure by
 * Jon Smirl, which included enhancements and simplifications to the
 * incoming IR buffer parsing routines.
 *
 *
 * 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/device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <media/rc-core.h>

#define DRIVER_VERSION	"1.91"
#define DRIVER_AUTHOR	"Jarod Wilson <jarod@wilsonet.com>"
#define DRIVER_DESC	"Windows Media Center Ed. eHome Infrared Transceiver " \
			"device driver"
#define DRIVER_NAME	"mceusb"

#define USB_BUFLEN		32 /* USB reception buffer length */
#define USB_CTRL_MSG_SZ		2  /* Size of usb ctrl msg on gen1 hw */
#define MCE_G1_INIT_MSGS	40 /* Init messages on gen1 hw to throw out */

/* MCE constants */
#define MCE_CMDBUF_SIZE		384  /* MCE Command buffer length */
#define MCE_TIME_UNIT		50   /* Approx 50us resolution */
#define MCE_CODE_LENGTH		5    /* Normal length of packet (with header) */
#define MCE_PACKET_SIZE		4    /* Normal length of packet (without header) */
#define MCE_IRDATA_HEADER	0x84 /* Actual header format is 0x80 + num_bytes */
#define MCE_IRDATA_TRAILER	0x80 /* End of IR data */
#define MCE_TX_HEADER_LENGTH	3    /* # of bytes in the initializing tx header */
#define MCE_MAX_CHANNELS	2    /* Two transmitters, hardware dependent? */
#define MCE_DEFAULT_TX_MASK	0x03 /* Vals: TX1=0x01, TX2=0x02, ALL=0x03 */
#define MCE_PULSE_BIT		0x80 /* Pulse bit, MSB set == PULSE else SPACE */
#define MCE_PULSE_MASK		0x7f /* Pulse mask */
#define MCE_MAX_PULSE_LENGTH	0x7f /* Longest transmittable pulse symbol */

#define MCE_HW_CMD_HEADER	0xff	/* MCE hardware command header */
#define MCE_COMMAND_HEADER	0x9f	/* MCE command header */
#define MCE_COMMAND_MASK	0xe0	/* Mask out command bits */
#define MCE_COMMAND_NULL	0x00	/* These show up various places... */
/* if buf[i] & MCE_COMMAND_MASK == 0x80 and buf[i] != MCE_COMMAND_HEADER,
 * then we're looking at a raw IR data sample */
#define MCE_COMMAND_IRDATA	0x80
#define MCE_PACKET_LENGTH_MASK	0x1f /* Packet length mask */

/* Sub-commands, which follow MCE_COMMAND_HEADER or MCE_HW_CMD_HEADER */
#define MCE_CMD_SIG_END		0x01	/* End of signal */
#define MCE_CMD_PING		0x03	/* Ping device */
#define MCE_CMD_UNKNOWN		0x04	/* Unknown */
#define MCE_CMD_UNKNOWN2	0x05	/* Unknown */
#define MCE_CMD_S_CARRIER	0x06	/* Set TX carrier frequency */
#define MCE_CMD_G_CARRIER	0x07	/* Get TX carrier frequency */
#define MCE_CMD_S_TXMASK	0x08	/* Set TX port bitmask */
#define MCE_CMD_UNKNOWN3	0x09	/* Unknown */
#define MCE_CMD_UNKNOWN4	0x0a	/* Unknown */
#define MCE_CMD_G_REVISION	0x0b	/* Get hw/sw revision */
#define MCE_CMD_S_TIMEOUT	0x0c	/* Set RX timeout value */
#define MCE_CMD_G_TIMEOUT	0x0d	/* Get RX timeout value */
#define MCE_CMD_UNKNOWN5	0x0e	/* Unknown */
#define MCE_CMD_UNKNOWN6	0x0f	/* Unknown */
#define MCE_CMD_G_RXPORTSTS	0x11	/* Get RX port status */
#define MCE_CMD_G_TXMASK	0x13	/* Set TX port bitmask */
#define MCE_CMD_S_RXSENSOR	0x14	/* Set RX sensor (std/learning) */
#define MCE_CMD_G_RXSENSOR	0x15	/* Get RX sensor (std/learning) */
#define MCE_RSP_PULSE_COUNT	0x15	/* RX pulse count (only if learning) */
#define MCE_CMD_TX_PORTS	0x16	/* Get number of TX ports */
#define MCE_CMD_G_WAKESRC	0x17	/* Get wake source */
#define MCE_CMD_UNKNOWN7	0x18	/* Unknown */
#define MCE_CMD_UNKNOWN8	0x19	/* Unknown */
#define MCE_CMD_UNKNOWN9	0x1b	/* Unknown */
#define MCE_CMD_DEVICE_RESET	0xaa	/* Reset the hardware */
#define MCE_RSP_CMD_INVALID	0xfe	/* Invalid command issued */


/* module parameters */
#ifdef CONFIG_USB_DEBUG
static int debug = 1;
#else
static int debug;
#endif

#define mce_dbg(dev, fmt, ...)					\
	do {							\
		if (debug)					\
			dev_info(dev, fmt, ## __VA_ARGS__);	\
	} while (0)

/* general constants */
#define SEND_FLAG_IN_PROGRESS	1
#define SEND_FLAG_COMPLETE	2
#define RECV_FLAG_IN_PROGRESS	3
#define RECV_FLAG_COMPLETE	4

#define MCEUSB_RX		1
#define MCEUSB_TX		2

#define VENDOR_PHILIPS		0x0471
#define VENDOR_SMK		0x0609
#define VENDOR_TATUNG		0x1460
#define VENDOR_GATEWAY		0x107b
#define VENDOR_SHUTTLE		0x1308
#define VENDOR_SHUTTLE2		0x051c
#define VENDOR_MITSUMI		0x03ee
#define VENDOR_TOPSEED		0x1784
#define VENDOR_RICAVISION	0x179d
#define VENDOR_ITRON		0x195d
#define VENDOR_FIC		0x1509
#define VENDOR_LG		0x043e
#define VENDOR_MICROSOFT	0x045e
#define VENDOR_FORMOSA		0x147a
#define VENDOR_FINTEK		0x1934
#define VENDOR_PINNACLE		0x2304
#define VENDOR_ECS		0x1019
#define VENDOR_WISTRON		0x0fb8
#define VENDOR_COMPRO		0x185b
#define VE