Initial import

1 files changed, 1479 insertions, 0 deletions

diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
new file mode 100644
index 000000000..2cdb740cd
--- /dev/null
+++ b/drivers/media/rc/mceusb.c
@@ -0,0 +1,1479 @@
+/*
+ * Driver for USB Windows Media Center Ed. eHome Infrared Transceivers
+ *
+ * Copyright (c) 2010-2011, 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.
+ *
+ * Updated in July of 2011 with the aid of Microsoft's official
+ * remote/transceiver requirements and specification document, found at
+ * download.microsoft.com, title
+ * Windows-Media-Center-RC-IR-Collection-Green-Button-Specification-03-08-2011-V2.pdf
+ *
+ *
+ * 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 <linux/pm_wakeup.h>
+#include <media/rc-core.h>
+
+#define DRIVER_VERSION	"1.92"
+#define DRIVER_AUTHOR	"Jarod Wilson <jarod@redhat.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_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 */
+
+/*
+ * The interface between the host and the IR hardware is command-response
+ * based. All commands and responses have a consistent format, where a lead
+ * byte always identifies the type of data following it. The lead byte has
+ * a port value in the 3 highest bits and a length value in the 5 lowest
+ * bits.
+ *
+ * The length field is overloaded, with a value of 11111 indicating that the
+ * following byte is a command or response code, and the length of the entire
+ * message is determined by the code. If the length field is not 11111, then
+ * it specifies the number of bytes of port data that follow.
+ */
+#define MCE_CMD			0x1f
+#define MCE_PORT_IR		0x4	/* (0x4 << 5) | MCE_CMD = 0x9f */
+#define MCE_PORT_SYS		0x7	/* (0x7 << 5) | MCE_CMD = 0xff */
+#define MCE_PORT_SER		0x6	/* 0xc0 thru 0xdf flush & 0x1f bytes */
+#define MCE_PORT_MASK		0xe0	/* Mask out command bits */
+
+/* Command port headers */
+#define MCE_CMD_PORT_IR		0x9f	/* IR-related cmd/rsp */
+#define MCE_CMD_PORT_SYS	0xff	/* System (non-IR) device cmd/rsp */
+
+/* Commands that set device state  (2-4 bytes in length) */
+#define MCE_CMD_RESET		0xfe	/* Reset device, 2 bytes */
+#define MCE_CMD_RESUME		0xaa	/* Resume device after error, 2 bytes */
+#define MCE_CMD_SETIRCFS	0x06	/* Set tx carrier, 4 bytes */
+#define MCE_CMD_SETIRTIMEOUT	0x0c	/* Set timeout, 4 bytes */
+#define MCE_CMD_SETIRTXPORTS	0x08	/* Set tx ports, 3 bytes */
+#define MCE_CMD_SETIRRXPORTEN	0x14	/* Set rx ports, 3 bytes */
+#define MCE_CMD_FLASHLED	0x23	/* Flash receiver LED, 2 bytes */
+
+/* Commands that query device state (all 2 bytes, unless noted) */
+#define MCE_CMD_GETIRCFS	0x07	/* Get carrier */
+#define MCE_CMD_GETIRTIMEOUT	0x0d	/* Get timeout */
+#define MCE_CMD_GETIRTXPORTS	0x13	/* Get tx ports */
+#define MCE_CMD_GETIRRXPORTEN	0x15	/* Get rx ports */
+#define MCE_CMD_GETPORTSTATUS	0x11	/* Get tx port status, 3 bytes */
+#define MCE_CMD_GETIRNUMPORTS	0x16	/* Get number of ports */
+#define MCE_CMD_GETWAKESOURCE	0x17	/* Get wake source */
+#define MCE_CMD_GETEMVER	0x22	/* Get emulator interface version */
+#define MCE_CMD_GETDEVDETAILS	0x21	/* Get device details (em ver2 only) */
+#define MCE_CMD_GETWAKESUPPORT	0x20	/* Get wake details (em ver2 only) */
+#define MCE_CMD_GETWAKEVERSION	0x18	/* Get wake pattern (em ver2 only) */
+
+/* Misc commands */
+#define MCE_CMD_NOP		0xff	/* No operation */
+
+/* Responses to commands (non-error cases) */
+#define MCE_RSP_EQIRCFS		0x06	/* tx carrier, 4 bytes */
+#define MCE_RSP_EQIRTIMEOUT	0x0c	/* rx timeout, 4 bytes */
+#define MCE_RSP_GETWAKESOURCE	0x17	/* wake source, 3 bytes */
+#define MCE_RSP_EQIRTXPORTS	0x08	/* tx port mask, 3 bytes */
+#define MCE_RSP_EQIRRXPORTEN	0x14	/* rx port mask, 3 bytes */
+#define MCE_RSP_GETPORTSTATUS	0x11	/* tx port status, 7 bytes */
+#define MCE_RSP_EQIRRXCFCNT	0x15	/* rx carrier count, 4 bytes */
+#define MCE_RSP_EQIRNUMPORTS	0x16	/* number of ports, 4 bytes */
+#define MCE_RSP_EQWAKESUPPORT	0x20	/* wake capabilities, 3 bytes */
+#define MCE_RSP_EQWAKEVERSION	0x18	/* wake pattern details, 6 bytes */
+#define MCE_RSP_EQDEVDETAILS	0x21	/* device capabilities, 3 bytes */
+#define MCE_RSP_EQEMVER		0x22	/* emulator interface ver, 3 bytes */
+#define MCE_RSP_FLASHLED	0x23	/* success flashing LED, 2 bytes */
+
+/* Responses to error cases, must send MCE_CMD_RESUME to clear them */
+#define MCE_RSP_CMD_ILLEGAL	0xfe	/* illegal command for port, 2 bytes */
+#define MCE_RSP_TX_TIMEOUT	0x81	/* tx timed out, 2 bytes */
+
+/* Misc commands/responses not defined in the MCE remote/transceiver spec */
+#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_UNKNOWN3	0x09	/* Unknown */
+#define MCE_CMD_UNKNOWN4	0x0a	/* Unknown */
+#define MCE_CMD_G_REVISION	0x0b	/* Get hw/sw revision */
+#define MCE_CMD_UNKNOWN5	0x0e	/* Unknown */
+#define MCE_CMD_UNKNOWN6	0x0f	/* Unknown */
+#define MCE_CMD_UNKNOWN8	0x19	/* Unknown */
+#define MCE_CMD_UNKNOWN9	0x1b	/* Unknown */
+#define MCE_CMD_NULL		0x00	/* These show up various places... */
+
+/* if buf[i] & MCE_PORT_MASK == 0x80 and buf[i] != MCE_CMD_PORT_IR,
+ * then we're looking at a raw IR data sample */
+#define MCE_COMMAND_IRDATA	0x80
+#define MCE_PACKET_LENGTH_MASK	0x1f /* Packet length mask */
+
+/* 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 VENDOR_NORTHSTAR	0x04eb
+#define VENDOR_REALTEK		0x0bda
+#define VENDOR_TIVO		0x105a
+#define VENDOR_CONEXANT		0x0572
+#define VENDOR_TWISTEDMELON	0x2596
+#define VENDOR_HAUPPAUGE	0x2040
+#define VENDOR_PCTV		0x2013
+
+enum mceusb_model_type {
+	MCE_GEN2 = 0,		/* Most boards */
+	MCE_GEN1,
+	MCE_GEN3,
+	MCE_GEN2_TX_INV,
+	POLARIS_EVK,
+	CX_HYBRID_TV,
+	MULTIFUNCTION,
+	TIVO_KIT,
+	MCE_GEN2_NO_TX,
+	HAUPPAUGE_CX_HYBRID_TV,
+};
+
+struct mceusb_model {
+	u32 mce_gen1:1;
+	u32 mce_gen2:1;
+	u32 mce_gen3:1;
+	u32 tx_mask_normal:1;
+	u32 no_tx:1;
+
+	int ir_intfnum;
+
+	const char *rc_map;	/* Allow specify a per-board map */
+	const char *name;	/* per-board name */
+};
+
+static const struct mceusb_model mceusb_model[] = {
+	[MCE_GEN1] = {
+		.mce_gen1 = 1,
+		.tx_mask_normal = 1,
+	},
+	[MCE_GEN2] = {
+		.mce_gen2 = 1,
+	},
+	[MCE_GEN2_NO_TX] = {
+		.mce_gen2 = 1,
+		.no_tx = 1,
+	},
+	[MCE_GEN2_TX_INV] = {
+		.mce_gen2 = 1,
+		.tx_mask_normal = 1,
+	},
+	[MCE_GEN3] = {
+		.mce_gen3 = 1,
+		.tx_mask_normal = 1,
+	},
+	[POLARIS_EVK] = {
+		/*
+		 * In fact, the EVK is shipped without
+		 * remotes, but we should have something handy,
+		 * to allow testing it
+		 */
+		.name = "Conexant Hybrid TV (cx231xx) MCE IR",
+	},
+	[CX_HYBRID_TV] = {
+		.no_tx = 1, /* tx isn't wired up at all */
+		.name = "Conexant Hybrid TV (cx231xx) MCE IR",
+	},
+	[HAUPPAUGE_CX_HYBRID_TV] = {
+		.no_tx = 1, /* eeprom says it has no tx */
+		.name = "Conexant Hybrid TV (cx231xx) MCE IR no TX",
+	},
+	[MULTIFUNCTION] = {
+		.mce_gen2 = 1,
+		.ir_intfnum = 2,
+	},
+	[TIVO_KIT] = {
+		.mce_gen2 = 1,
+		.rc_map = RC_MAP_TIVO,
+	},
+};
+
+static struct usb_device_id mceusb_dev_table[] = {
+	/* Original Microsoft MCE IR Transceiver (often HP-branded) */
+	{ USB_DEVICE(VENDOR_MICROSOFT, 0x006d),
+	  .driver_info = MCE_GEN1 },
+	/* Philips Infrared Transceiver - Sahara branded */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x0608) },
+	/* Philips Infrared Transceiver - HP branded */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x060c),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* Philips SRM5100 */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x060d) },
+	/* Philips Infrared Transceiver - Omaura */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x060f) },
+	/* Philips Infrared Transceiver - Spinel plus */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x0613) },
+	/* Philips eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x0815) },
+	/* Philips/Spinel plus IR transceiver for ASUS */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x206c) },
+	/* Philips/Spinel plus IR transceiver for ASUS */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x2088) },
+	/* Philips IR transceiver (Dell branded) */
+	{ USB_DEVICE(VENDOR_PHILIPS, 0x2093),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* Realtek MCE IR Receiver and card reader */
+	{ USB_DEVICE(VENDOR_REALTEK, 0x0161),
+	  .driver_info = MULTIFUNCTION },
+	/* SMK/Toshiba G83C0004D410 */
+	{ USB_DEVICE(VENDOR_SMK, 0x031d),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* SMK eHome Infrared Transceiver (Sony VAIO) */
+	{ USB_DEVICE(VENDOR_SMK, 0x0322),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* bundled with Hauppauge PVR-150 */
+	{ USB_DEVICE(VENDOR_SMK, 0x0334),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* SMK eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_SMK, 0x0338) },
+	/* SMK/I-O Data GV-MC7/RCKIT Receiver */
+	{ USB_DEVICE(VENDOR_SMK, 0x0353),
+	  .driver_info = MCE_GEN2_NO_TX },
+	/* Tatung eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_TATUNG, 0x9150) },
+	/* Shuttle eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_SHUTTLE, 0xc001) },
+	/* Shuttle eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_SHUTTLE2, 0xc001) },
+	/* Gateway eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_GATEWAY, 0x3009) },
+	/* Mitsumi */
+	{ USB_DEVICE(VENDOR_MITSUMI, 0x2501) },
+	/* Topseed eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_TOPSEED, 0x0001),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* Topseed HP eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_TOPSEED, 0x0006),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* Topseed eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_TOPSEED, 0x0007),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* Topseed eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_TOPSEED, 0x0008),
+	  .driver_info = MCE_GEN3 },
+	/* Topseed eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_TOPSEED, 0x000a),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* Topseed eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_TOPSEED, 0x0011),
+	  .driver_info = MCE_GEN3 },
+	/* Ricavision internal Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_RICAVISION, 0x0010) },
+	/* Itron ione Libra Q-11 */
+	{ USB_DEVICE(VENDOR_ITRON, 0x7002) },
+	/* FIC eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_FIC, 0x9242) },
+	/* LG eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_LG, 0x9803) },
+	/* Microsoft MCE Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_MICROSOFT, 0x00a0) },
+	/* Formosa eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe015) },
+	/* Formosa21 / eHome Infrared Receiver */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe016) },
+	/* Formosa aim / Trust MCE Infrared Receiver */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe017),
+	  .driver_info = MCE_GEN2_NO_TX },
+	/* Formosa Industrial Computing / Beanbag Emulation Device */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe018) },
+	/* Formosa21 / eHome Infrared Receiver */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe03a) },
+	/* Formosa Industrial Computing AIM IR605/A */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe03c) },
+	/* Formosa Industrial Computing */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe03e) },
+	/* Formosa Industrial Computing */
+	{ USB_DEVICE(VENDOR_FORMOSA, 0xe042) },
+	/* Fintek eHome Infrared Transceiver (HP branded) */
+	{ USB_DEVICE(VENDOR_FINTEK, 0x5168),
+	  .driver_info = MCE_GEN2_TX_INV },
+	/* Fintek eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_FINTEK, 0x0602) },
+	/* Fintek eHome Infrared Transceiver (in the AOpen MP45) */
+	{ USB_DEVICE(VENDOR_FINTEK, 0x0702) },
+	/* Pinnacle Remote Kit */
+	{ USB_DEVICE(VENDOR_PINNACLE, 0x0225),
+	  .driver_info = MCE_GEN3 },
+	/* Elitegroup Computer Systems IR */
+	{ USB_DEVICE(VENDOR_ECS, 0x0f38) },
+	/* Wistron Corp. eHome Infrared Receiver */
+	{ USB_DEVICE(VENDOR_WISTRON, 0x0002) },
+	/* Compro K100 */
+	{ USB_DEVICE(VENDOR_COMPRO, 0x3020) },
+	/* Compro K100 v2 */
+	{ USB_DEVICE(VENDOR_COMPRO, 0x3082) },
+	/* Northstar Systems, Inc. eHome Infrared Transceiver */
+	{ USB_DEVICE(VENDOR_NORTHSTAR, 0xe004) },
+	/* TiVo PC IR Receiver */
+	{ USB_DEVICE(VENDOR_TIVO, 0x2000),
+	  .driver_info = TIVO_KIT },
+	/* Conexant Hybrid TV "Shelby" Polaris SDK */
+	{ USB_DEVICE(VENDOR_CONEXANT, 0x58a1),
+	  .driver_info = POLARIS_EVK },
+	/* Conexant Hybrid TV RDU253S Polaris */
+	{ USB_DEVICE(VENDOR_CONEXANT, 0x58a5),
+	  .driver_info = CX_HYBRID_TV },
+	/* Twisted Melon Inc. - Manta Mini Receiver */
+	{ USB_DEVICE(VENDOR_TWISTEDMELON, 0x8008) },
+	/* Twisted Melon Inc. - Manta Pico Receiver */
+	{ USB_DEVICE(VENDOR_TWISTEDMELON, 0x8016) },
+	/* Twisted Melon Inc. - Manta Transceiver */
+	{ USB_DEVICE(VENDOR_TWISTEDMELON, 0x8042) },
+	/* Hauppauge WINTV-HVR-HVR 930C-HD - based on cx231xx */
+	{ USB_DEVICE(VENDOR_HAUPPAUGE, 0xb130),
+	  .driver_info = HAUPPAUGE_CX_HYBRID_TV },
+	{ USB_DEVICE(VENDOR_HAUPPAUGE, 0xb131),
+	  .driver_info = HAUPPAUGE_CX_HYBRID_TV },
+	{ USB_DEVICE(VENDOR_HAUPPAUGE, 0xb138),
+	  .driver_info = HAUPPAUGE_CX_HYBRID_TV },
+	{ USB_DEVICE(VENDOR_HAUPPAUGE, 0xb139),
+	  .driver_info = HAUPPAUGE_CX_HYBRID_TV },
+	{ USB_DEVICE(VENDOR_PCTV, 0x0259),
+	  .driver_info = HAUPPAUGE_CX_HYBRID_TV },
+	{ USB_DEVICE(VENDOR_PCTV, 0x025e),
+	  .driver_info = HAUPPAUGE_CX_HYBRID_TV },
+
+	/* Terminating entry */
+	{ }
+};
+
+/* data structure for each usb transceiver */
+struct mceusb_dev {
+	/* ir-core bits */
+	struct rc_dev *rc;
+
+	/* optional features we can enable */
+	bool carrier_report_enabled;
+	bool learning_enabled;
+
+	/* core device bits */
+	struct device *dev;
+
+	/* usb */
+	struct usb_device *usbdev;
+	struct urb *urb_in;
+	struct usb_endpoint_descriptor *usb_ep_out;
+
+	/* buffers and dma */
+	unsigned char *buf_in;
+	unsigned int len_in;
+	dma_addr_t dma_in;
+
+	enum {
+		CMD_HEADER = 0,
+		SUBCMD,
+		CMD_DATA,
+		PARSE_IRDATA,
+	} parser_state;
+
+	u8 cmd, rem;		/* Remaining IR data bytes in packet */
+
+	struct {
+		u32 connected:1;
+		u32 tx_mask_normal:1;
+		u32 microsoft_gen1:1;
+		u32 no_tx:1;
+	} flags;
+
+	/* transmit support */
+	int send_flags;
+	u32 carrier;
+	unsigned char tx_mask;
+
+	char name[128];
+	char phys[64];
+	enum mceusb_model_type model;
+
+	bool need_reset;	/* flag to issue a device resume cmd */
+	u8 emver;		/* emulator interface version */
+	u8 num_txports;		/* number of transmit ports */
+	u8 num_rxports;		/* number of receive sensors */
+	u8 txports_cabled;	/* bitmask of transmitters with cable */
+	u8 rxports_active;	/* bitmask of active receive sensors */
+};
+
+/* MCE Device Command Strings, generally a port and command pair */
+static char DEVICE_RESUME[]	= {MCE_CMD_NULL, MCE_CMD_PORT_SYS,
+				   MCE_CMD_RESUME};
+static char GET_REVISION[]	= {MCE_CMD_PORT_SYS, MCE_CMD_G_REVISION};
+static char GET_EMVER[]		= {MCE_CMD_PORT_SYS, MCE_CMD_GETEMVER};
+static char GET_WAKEVERSION[]	= {MCE_CMD_PORT_SYS, MCE_CMD_GETWAKEVERSION};
+static char FLASH_LED[]		= {MCE_CMD_PORT_SYS, MCE_CMD_FLASHLED};
+static char GET_UNKNOWN2[]	= {MCE_CMD_PORT_IR, MCE_CMD_UNKNOWN2};
+static char GET_CARRIER_FREQ[]	= {MCE_CMD_PORT_IR, MCE_CMD_GETIRCFS};
+static char GET_RX_TIMEOUT[]	= {MCE_CMD_PORT_IR, MCE_CMD_GETIRTIMEOUT};
+static char GET_NUM_PORTS[]	= {MCE_CMD_PORT_IR, MCE_CMD_GETIRNUMPORTS};
+static char GET_TX_BITMASK[]	= {MCE_CMD_PORT_IR, MCE_CMD_GETIRTXPORTS};
+static char GET_RX_SENSOR[]	= {MCE_CMD_PORT_IR, MCE_CMD_GETIRRXPORTEN};
+/* sub in desired values in lower byte or bytes for full command */
+/* FIXME: make use of these for transmit.
+static char SET_CARRIER_FREQ[]	= {MCE_CMD_PORT_IR,
+				   MCE_CMD_SETIRCFS, 0x00, 0x00};
+static char SET_TX_BITMASK[]	= {MCE_CMD_PORT_IR, MCE_CMD_SETIRTXPORTS, 0x00};
+static char SET_RX_TIMEOUT[]	= {MCE_CMD_PORT_IR,
+				   MCE_CMD_SETIRTIMEOUT, 0x00, 0x00};
+static char SET_RX_SENSOR[]	= {MCE_CMD_PORT_IR,
+				   MCE_RSP_EQIRRXPORTEN, 0x00};
+*/
+
+static int mceusb_cmd_datasize(u8 cmd, u8 subcmd)
+{
+	int datasize = 0;
+
+	switch (cmd) {
+	case MCE_CMD_NULL:
+		if (subcmd == MCE_CMD_PORT_SYS)
+			datasize = 1;
+		break;
+	case MCE_CMD_PORT_SYS:
+		switch (subcmd) {
+		case MCE_RSP_GETPORTSTATUS:
+			datasize = 5;
+			break;
+		case MCE_RSP_EQWAKEVERSION:
+			datasize = 4;
+			break;
+		case MCE_CMD_G_REVISION:
+			datasize = 2;
+			break;
+		case MCE_RSP_EQWAKESUPPORT:
+		case MCE_RSP_GETWAKESOURCE:
+		case MCE_RSP_EQDEVDETAILS:
+		case MCE_RSP_EQEMVER:
+			datasize = 1;
+			break;
+		}
+	case MCE_CMD_PORT_IR:
+		switch (subcmd) {
+		case MCE_CMD_UNKNOWN:
+		case MCE_RSP_EQIRCFS:
+		case MCE_RSP_EQIRTIMEOUT:
+		case MCE_RSP_EQIRRXCFCNT:
+		case MCE_RSP_EQIRNUMPORTS:
+			datasize = 2;
+			break;
+		case MCE_CMD_SIG_END:
+		case MCE_RSP_EQIRTXPORTS:
+		case MCE_RSP_EQIRRXPORTEN:
+			datasize = 1;
+			break;
+		}
+	}
+	return datasize;
+}
+
+static void mceusb_dev_printdata(struct mceusb_dev *ir, char *buf,
+				 int offset, int len, bool out)
+{
+#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
+	char *inout;
+	u8 cmd, subcmd, data1, data2, data3, data4;
+	struct device *dev = ir->dev;
+	int start, skip = 0;
+	u32 carrier, period;
+
+	/* skip meaningless 0xb1 0x60 header bytes on orig receiver */
+	if (ir->flags.microsoft_gen1 && !out && !offset)
+		skip = 2;
+
+	if (len <= skip)
+		return;
+
+	dev_dbg(dev, "%cx data: %*ph (length=%d)",
+		(out ? 't' : 'r'), min(len, USB_BUFLEN), buf, len);
+
+	inout = out ? "Request" : "Got";
+
+	start  = offset + skip;
+	cmd    = buf[start] & 0xff;
+	subcmd = buf[start + 1] & 0xff;
+	data1  = buf[start + 2] & 0xff;
+	data2  = buf[start + 3] & 0xff;
+	data3  = buf[start + 4] & 0xff;
+	data4  = buf[start + 5] & 0xff;
+
+	switch (cmd) {
+	case MCE_CMD_NULL:
+		if (subcmd == MCE_CMD_NULL)
+			break;
+		if ((subcmd == MCE_CMD_PORT_SYS) &&
+		    (data1 == MCE_CMD_RESUME))
+			dev_dbg(dev, "Device resume requested");
+		else
+			dev_dbg(dev, "Unknown command 0x%02x 0x%02x",
+				 cmd, subcmd);
+		break;
+	case MCE_CMD_PORT_SYS:
+		switch (subcmd) {
+		case MCE_RSP_EQEMVER:
+			if (!out)
+				dev_dbg(dev, "Emulator interface version %x",
+					 data1);
+			break;
+		case MCE_CMD_G_REVISION:
+			if (len == 2)
+				dev_dbg(dev, "Get hw/sw rev?");
+			else
+				dev_dbg(dev, "hw/sw rev 0x%02x 0x%02x 0x%02x 0x%02x",
+					 data1, data2,
+					 buf[start + 4], buf[start + 5]);
+			break;
+		case MCE_CMD_RESUME:
+			dev_dbg(dev, "Device resume requested");
+			break;
+		case MCE_RSP_CMD_ILLEGAL:
+			dev_dbg(dev, "Illegal PORT_SYS command");
+			break;
+		case MCE_RSP_EQWAKEVERSION:
+			if (!out)
+				dev_dbg(dev, "Wake version, proto: 0x%02x, "
+					 "payload: 0x%02x, address: 0x%02x, "
+					 "version: 0x%02x",
+					 data1, data2, data3, data4);
+			break;
+		case MCE_RSP_GETPORTSTATUS:
+			if (!out)
+				/* We use data1 + 1 here, to match hw labels */
+				dev_dbg(dev, "TX port %d: blaster is%s connected",
+					 data1 + 1, data4 ? " not" : "");
+			break;
+		case MCE_CMD_FLASHLED:
+			dev_dbg(dev, "Attempting to flash LED");
+			break;
+		default:
+			dev_dbg(dev, "Unknown command 0x%02x 0x%02x",
+				 cmd, subcmd);
+			break;
+		}
+		break;
+	case MCE_CMD_PORT_IR:
+		switch (subcmd) {
+		case MCE_CMD_SIG_END:
+			dev_dbg(dev, "End of signal");
+			break;
+		case MCE_CMD_PING:
+			dev_dbg(dev, "Ping");
+			break;
+		case MCE_CMD_UNKNOWN:
+			dev_dbg(dev, "Resp to 9f 05 of 0x%02x 0x%02x",
+				 data1, data2);
+			break;
+		case MCE_RSP_EQIRCFS:
+			period = DIV_ROUND_CLOSEST(
+					(1U << data1 * 2) * (data2 + 1), 10);
+			if (!period)
+				break;
+			carrier = (1000 * 1000) / period;
+			dev_dbg(dev, "%s carrier of %u Hz (period %uus)",
+				 inout, carrier, period);
+			break;
+		case MCE_CMD_GETIRCFS:
+			dev_dbg(dev, "Get carrier mode and freq");
+			break;
+		case MCE_RSP_EQIRTXPORTS:
+			dev_dbg(dev, "%s transmit blaster mask of 0x%02x",
+				 inout, data1);
+			break;
+		case MCE_RSP_EQIRTIMEOUT:
+			/* value is in units of 50us, so x*50/1000 ms */
+			period = ((data1 << 8) | data2) * MCE_TIME_UNIT / 1000;
+			dev_dbg(dev, "%s receive timeout of %d ms",
+				 inout, period);
+			break;
+		case MCE_CMD_GETIRTIMEOUT:
+			dev_dbg(dev, "Get receive timeout");
+			break;
+		case MCE_CMD_GETIRTXPORTS:
+			dev_dbg(dev, "Get transmit blaster mask");
+			break;
+		case MCE_RSP_EQIRRXPORTEN:
+			dev_dbg(dev, "%s %s-range receive sensor in use",
+				 inout, data1 == 0x02 ? "short" : "long");
+			break;
+		case MCE_CMD_GETIRRXPORTEN:
+		/* aka MCE_RSP_EQIRRXCFCNT */
+			if (out)
+				dev_dbg(dev, "Get receive sensor");
+			else if (ir->learning_enabled)
+				dev_dbg(dev, "RX pulse count: %d",
+					 ((data1 << 8) | data2));
+			break;
+		case MCE_RSP_EQIRNUMPORTS:
+			if (out)
+				break;
+			dev_dbg(dev, "Num TX ports: %x, num RX ports: %x",
+				 data1, data2);
+			break;
+		case MCE_RSP_CMD_ILLEGAL:
+			dev_dbg(dev, "Illegal PORT_IR command");
+			break;
+		default:
+			dev_dbg(dev, "Unknown command 0x%02x 0x%02x",
+				 cmd, subcmd);
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+
+	if (cmd == MCE_IRDATA_TRAILER)
+		dev_dbg(dev, "End of raw IR data");
+	else if ((cmd != MCE_CMD_PORT_IR) &&
+		 ((cmd & MCE_PORT_MASK) == MCE_COMMAND_IRDATA))
+		dev_dbg(dev, "Raw IR data, %d pulse/space samples", ir->rem);
+#endif
+}
+
+static void mce_async_callback(struct urb *urb)
+{
+	struct mceusb_dev *ir;
+	int len;
+
+	if (!urb)
+		return;
+
+	ir = urb->context;
+
+	switch (urb->status) {
+	/* success */
+	case 0:
+		len = urb->actual_length;
+
+		mceusb_dev_printdata(ir, urb->transfer_buffer, 0, len, true);
+		break;
+
+	case -ECONNRESET:
+	case -ENOENT:
+	case -EILSEQ:
+	case -ESHUTDOWN:
+		break;
+
+	case -EPIPE:
+	default:
+		dev_err(ir->dev, "Error: request urb status = %d", urb->status);
+		break;
+	}
+
+	/* the transfer buffer and urb were allocated in mce_request_packet */
+	kfree(urb->transfer_buffer);
+	usb_free_urb(urb);
+}
+
+/* request incoming or send outgoing usb packet - used to initialize remote */
+static void mce_request_packet(struct mceusb_dev *ir, unsigned char *data,
+			       int size, int urb_type)
+{
+	int res, pipe;
+	struct urb *async_urb;
+	struct device *dev = ir->dev;
+	unsigned char *async_buf;
+
+	if (urb_type == MCEUSB_TX) {
+		async_urb = usb_alloc_urb(0, GFP_KERNEL);
+		if (unlikely(!async_urb)) {
+			dev_err(dev, "Error, couldn't allocate urb!\n");
+			return;
+		}
+
+		async_buf = kzalloc(size, GFP_KERNEL);
+		if (!async_buf) {
+			dev_err(dev, "Error, couldn't allocate buf!\n");
+			usb_free_urb(async_urb);
+			return;
+		}
+
+		/* outbound data */
+		if (usb_endpoint_xfer_int(ir->usb_ep_out)) {
+			pipe = usb_sndintpipe(ir->usbdev,
+					 ir->usb_ep_out->bEndpointAddress);
+			usb_fill_int_urb(async_urb, ir->usbdev, pipe, async_buf,
+					 size, mce_async_callback, ir,
+					 ir->usb_ep_out->bInterval);
+		} else {
+			pipe = usb_sndbulkpipe(ir->usbdev,
+					 ir->usb_ep_out->bEndpointAddress);
+			usb_fill_bulk_urb(async_urb, ir->usbdev, pipe,
+					 async_buf, size, mce_async_callback,
+					 ir);
+		}
+		memcpy(async_buf, data, size);
+
+	} else if (urb_type == MCEUSB_RX) {
+		/* standard request */
+		async_urb = ir->urb_in;
+		ir->send_flags = RECV_FLAG_IN_PROGRESS;
+
+	} else {
+		dev_err(dev, "Error! Unknown urb type %d\n", urb_type);
+		return;
+	}
+
+	dev_dbg(dev, "receive request called (size=%#x)", size);
+
+	async_urb->transfer_buffer_length = size;
+	async_urb->dev = ir->usbdev;
+
+	res = usb_submit_urb(async_urb, GFP_ATOMIC);
+	if (res) {
+		dev_err(dev, "receive request FAILED! (res=%d)", res);
+		return;
+	}
+	dev_dbg(dev, "receive request complete (res=%d)", res);
+}
+
+static void mce_async_out(struct mceusb_dev *ir, unsigned char *data, int size)
+{
+	int rsize = sizeof(DEVICE_RESUME);
+
+	if (ir->need_reset) {
+		ir->need_reset = false;
+		mce_request_packet(ir, DEVICE_RESUME, rsize, MCEUSB_TX);
+		msleep(10);
+	}
+
+	mce_request_packet(ir, data, size, MCEUSB_TX);
+	msleep(10);
+}
+
+static void mce_flush_rx_buffer(struct mceusb_dev *ir, int size)
+{
+	mce_request_packet(ir, NULL, size, MCEUSB_RX);
+}
+
+/* Send data out the IR blaster port(s) */
+static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
+{
+	struct mceusb_dev *ir = dev->priv;
+	int i, length, ret = 0;
+	int cmdcount = 0;
+	unsigned char cmdbuf[MCE_CMDBUF_SIZE];
+
+	/* MCE tx init header */
+	cmdbuf[cmdcount++] = MCE_CMD_PORT_IR;
+	cmdbuf[cmdcount++] = MCE_CMD_SETIRTXPORTS;
+	cmdbuf[cmdcount++] = ir->tx_mask;
+
+	/* Send the set TX ports command */
+	mce_async_out(ir, cmdbuf, cmdcount);
+	cmdcount = 0;
+
+	/* Generate mce packet data */
+	for (i = 0; (i < count) && (cmdcount < MCE_CMDBUF_SIZE); i++) {
+		txbuf[i] = txbuf[i] / MCE_TIME_UNIT;
+
+		do { /* loop to support long pulses/spaces > 127*50us=6.35ms */
+
+			/* Insert mce packet header every 4th entry */
+			if ((cmdcount < MCE_CMDBUF_SIZE) &&
+			    (cmdcount % MCE_CODE_LENGTH) == 0)
+				cmdbuf[cmdcount++] = MCE_IRDATA_HEADER;
+
+			/* Insert mce packet data */
+			if (cmdcount < MCE_CMDBUF_SIZE)
+				cmdbuf[cmdcount++] =
+					(txbuf[i] < MCE_PULSE_BIT ?
+					 txbuf[i] : MCE_MAX_PULSE_LENGTH) |
+					 (i & 1 ? 0x00 : MCE_PULSE_BIT);
+			else {
+				ret = -EINVAL;
+				goto out;
+			}
+
+		} while ((txbuf[i] > MCE_MAX_PULSE_LENGTH) &&
+			 (txbuf[i] -= MCE_MAX_PULSE_LENGTH));
+	}
+
+	/* Check if we have room for the empty packet at the end */
+	if (cmdcount >= MCE_CMDBUF_SIZE) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* Fix packet length in last header */
+	length = cmdcount % MCE_CODE_LENGTH;
+	cmdbuf[cmdcount - length] -= MCE_CODE_LENGTH - length;
+
+	/* All mce commands end with an empty packet (0x80) */
+	cmdbuf[cmdcount++] = MCE_IRDATA_TRAILER;
+
+	/* Transmit the command to the mce device */
+	mce_async_out(ir, cmdbuf, cmdcount);
+
+out:
+	return ret ? ret : count;
+}
+
+/* Sets active IR outputs -- mce devices typically have two */
+static int mceusb_set_tx_mask(struct rc_dev *dev, u32 mask)
+{
+	struct mceusb_dev *ir = dev->priv;
+
+	if (ir->flags.tx_mask_normal)
+		ir->tx_mask = mask;
+	else
+		ir->tx_mask = (mask != MCE_DEFAULT_TX_MASK ?
+				mask ^ MCE_DEFAULT_TX_MASK : mask) << 1;
+
+	return 0;
+}
+
+/* Sets the send carrier frequency and mode */
+static int mceusb_set_tx_carrier(struct rc_dev *dev, u32 carrier)
+{
+	struct mceusb_dev *ir = dev->priv;
+	int clk = 10000000;
+	int prescaler = 0, divisor = 0;
+	unsigned char cmdbuf[4] = { MCE_CMD_PORT_IR,
+				    MCE_CMD_SETIRCFS, 0x00, 0x00 };
+
+	/* Carrier has changed */
+	if (ir->carrier != carrier) {
+
+		if (carrier == 0) {
+			ir->carrier = carrier;
+			cmdbuf[2] = MCE_CMD_SIG_END;
+			cmdbuf[3] = MCE_IRDATA_TRAILER;
+			dev_dbg(ir->dev, "disabling carrier modulation");
+			mce_async_out(ir, cmdbuf, sizeof(cmdbuf));
+			return carrier;
+		}
+
+		for (prescaler = 0; prescaler < 4; ++prescaler) {
+			divisor = (clk >> (2 * prescaler)) / carrier;
+			if (divisor <= 0xff) {
+				ir->carrier = carrier;
+				cmdbuf[2] = prescaler;
+				cmdbuf[3] = divisor;
+				dev_dbg(ir->dev, "requesting %u HZ carrier",
+								carrier);
+
+				/* Transmit new carrier to mce device */
+				mce_async_out(ir, cmdbuf, sizeof(cmdbuf));
+				return carrier;
+			}
+		}
+
+		return -EINVAL;
+
+	}
+
+	return carrier;
+}
+
+/*
+ * We don't do anything but print debug spew for many of the command bits
+ * we receive from the hardware, but some of them are useful information
+ * we want to store so that we can use them.
+ */
+static void mceusb_handle_command(struct mceusb_dev *ir, int index)
+{
+	u8 hi = ir->buf_in[index + 1] & 0xff;
+	u8 lo = ir->buf_in[index + 2] & 0xff;
+
+	switch (ir->buf_in[index]) {
+	/* the one and only 5-byte return value command */
+	case MCE_RSP_GETPORTSTATUS:
+		if ((ir->buf_in[index + 4] & 0xff) == 0x00)
+			ir->txports_cabled |= 1 << hi;
+		break;
+
+	/* 2-byte return value commands */
+	case MCE_RSP_EQIRTIMEOUT:
+		ir->rc->timeout = US_TO_NS((hi << 8 | lo) * MCE_TIME_UNIT);
+		break;
+	case MCE_RSP_EQIRNUMPORTS:
+		ir->num_txports = hi;
+		ir->num_rxports = lo;
+		break;
+
+	/* 1-byte return value commands */
+	case MCE_RSP_EQEMVER:
+		ir->emver = hi;
+		break;
+	case MCE_RSP_EQIRTXPORTS:
+		ir->tx_mask = hi;
+		break;
+	case MCE_RSP_EQIRRXPORTEN:
+		ir->learning_enabled = ((hi & 0x02) == 0x02);
+		ir->rxports_active = hi;
+		break;
+	case MCE_RSP_CMD_ILLEGAL:
+		ir->need_reset = true;
+		break;
+	default:
+		break;
+	}
+}
+
+static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len)
+{
+	DEFINE_IR_RAW_EVENT(rawir);
+	bool event = false;
+	int i = 0;
+
+	/* skip meaningless 0xb1 0x60 header bytes on orig receiver */
+	if (ir->flags.microsoft_gen1)
+		i = 2;
+
+	/* if there's no data, just return now */
+	if (buf_len <= i)
+		return;
+
+	for (; i < buf_len; i++) {
+		switch (ir->parser_state) {
+		case SUBCMD:
+			ir->rem = mceusb_cmd_datasize(ir->cmd, ir->buf_in[i]);
+			mceusb_dev_printdata(ir, ir->buf_in, i - 1,
+					     ir->rem + 2, false);
+			mceusb_handle_command(ir, i);
+			ir->parser_state = CMD_DATA;
+			break;
+		case PARSE_IRDATA:
+			ir->rem--;
+			init_ir_raw_event(&rawir);
+			rawir.pulse = ((ir->buf_in[i] & MCE_PULSE_BIT) != 0);
+			rawir.duration = (ir->buf_in[i] & MCE_PULSE_MASK)
+					 * US_TO_NS(MCE_TIME_UNIT);
+
+			dev_dbg(ir->dev, "Storing %s with duration %d",
+				rawir.pulse ? "pulse" : "space",
+				rawir.duration);
+
+			if (ir_raw_event_store_with_filter(ir->rc, &rawir))
+				event = true;
+			break;
+		case CMD_DATA:
+			ir->rem--;
+			break;
+		case CMD_HEADER:
+			/* decode mce packets of the form (84),AA,BB,CC,DD */
+			/* IR data packets can span USB messages - rem */
+			ir->cmd = ir->buf_in[i];
+			if ((ir->cmd == MCE_CMD_PORT_IR) ||
+			    ((ir->cmd & MCE_PORT_MASK) !=
+			     MCE_COMMAND_IRDATA)) {
+				ir->parser_state = SUBCMD;
+				continue;
+			}
+			ir->rem = (ir->cmd & MCE_PACKET_LENGTH_MASK);
+			mceusb_dev_printdata(ir, ir->buf_in,
+					     i, ir->rem + 1, false);
+			if (ir->rem)
+				ir->parser_state = PARSE_IRDATA;
+			else
+				ir_raw_event_reset(ir->rc);
+			break;
+		}
+
+		if (ir->parser_state != CMD_HEADER && !ir->rem)
+			ir->parser_state = CMD_HEADER;
+	}
+	if (event) {
+		dev_dbg(ir->dev, "processed IR data");
+		ir_raw_event_handle(ir->rc);
+	}
+}
+
+static void mceusb_dev_recv(struct urb *urb)
+{
+	struct mceusb_dev *ir;
+	int buf_len;
+
+	if (!urb)
+		return;
+
+	ir = urb->context;
+	if (!ir) {
+		usb_unlink_urb(urb);
+		return;
+	}
+
+	buf_len = urb->actual_length;
+
+	if (ir->send_flags == RECV_FLAG_IN_PROGRESS) {
+		ir->send_flags = SEND_FLAG_COMPLETE;
+		dev_dbg(ir->dev, "setup answer received %d bytes\n",
+			buf_len);
+	}
+
+	switch (urb->status) {
+	/* success */
+	case 0:
+		mceusb_process_ir_data(ir, buf_len);
+		break;
+
+	case -ECONNRESET:
+	case -ENOENT:
+	case -EILSEQ:
+	case -ESHUTDOWN:
+		usb_unlink_urb(urb);
+		return;
+
+	case -EPIPE:
+	default:
+		dev_err(ir->dev, "Error: urb status = %d", urb->status);
+		break;
+	}
+
+	usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+static void mceusb_get_emulator_version(struct mceusb_dev *ir)
+{
+	/* If we get no reply or an illegal command reply, its ver 1, says MS */
+	ir->emver = 1;
+	mce_async_out(ir, GET_EMVER, sizeof(GET_EMVER));
+}
+
+static void mceusb_gen1_init(struct mceusb_dev *ir)
+{
+	int ret;
+	struct device *dev = ir->dev;
+	char *data;
+
+	data = kzalloc(USB_CTRL_MSG_SZ, GFP_KERNEL);
+	if (!data) {
+		dev_err(dev, "%s: memory allocation failed!", __func__);
+		return;
+	}
+
+	/*
+	 * This is a strange one. Windows issues a set address to the device
+	 * on the receive control pipe and expect a certain value pair back
+	 */
+	ret = usb_control_msg(ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0),
+			      USB_REQ_SET_ADDRESS, USB_TYPE_VENDOR, 0, 0,
+			      data, USB_CTRL_MSG_SZ, HZ * 3);
+	dev_dbg(dev, "set address - ret = %d", ret);
+	dev_dbg(dev, "set address - data[0] = %d, data[1] = %d",
+						data[0], data[1]);
+
+	/* set feature: bit rate 38400 bps */
+	ret = usb_control_msg(ir->usbdev, usb_sndctrlpipe(ir->usbdev, 0),
+			      USB_REQ_SET_FEATURE, USB_TYPE_VENDOR,
+			      0xc04e, 0x0000, NULL, 0, HZ * 3);
+
+	dev_dbg(dev, "set feature - ret = %d", ret);
+
+	/* bRequest 4: set char length to 8 bits */
+	ret = usb_control_msg(ir->usbdev, usb_sndctrlpipe(ir->usbdev, 0),
+			      4, USB_TYPE_VENDOR,
+			      0x0808, 0x0000, NULL, 0, HZ * 3);
+	dev_dbg(dev, "set char length - retB = %d", ret);
+
+	/* bRequest 2: set handshaking to use DTR/DSR */
+	ret = usb_control_msg(ir->usbdev, usb_sndctrlpipe(ir->usbdev, 0),
+			      2, USB_TYPE_VENDOR,
+			      0x0000, 0x0100, NULL, 0, HZ * 3);
+	dev_dbg(dev, "set handshake  - retC = %d", ret);
+
+	/* device resume */
+	mce_async_out(ir, DEVICE_RESUME, sizeof(DEVICE_RESUME));
+
+	/* get hw/sw revision? */
+	mce_async_out(ir, GET_REVISION, sizeof(GET_REVISION));
+
+	kfree(data);
+}
+
+static void mceusb_gen2_init(struct mceusb_dev *ir)
+{
+	/* device resume */
+	mce_async_out(ir, DEVICE_RESUME, sizeof(DEVICE_RESUME));
+
+	/* get wake version (protocol, key, address) */
+	mce_async_out(ir, GET_WAKEVERSION, sizeof(GET_WAKEVERSION));
+
+	/* unknown what this one actually returns... */
+	mce_async_out(ir, GET_UNKNOWN2, sizeof(GET_UNKNOWN2));
+}
+
+static void mceusb_get_parameters(struct mceusb_dev *ir)
+{
+	int i;
+	unsigned char cmdbuf[3] = { MCE_CMD_PORT_SYS,
+				    MCE_CMD_GETPORTSTATUS, 0x00 };
+
+	/* defaults, if the hardware doesn't support querying */
+	ir->num_txports = 2;
+	ir->num_rxports = 2;
+
+	/* get number of tx and rx ports */
+	mce_async_out(ir, GET_NUM_PORTS, sizeof(GET_NUM_PORTS));
+
+	/* get the carrier and frequency */
+	mce_async_out(ir, GET_CARRIER_FREQ, sizeof(GET_CARRIER_FREQ));
+
+	if (ir->num_txports && !ir->flags.no_tx)
+		/* get the transmitter bitmask */
+		mce_async_out(ir, GET_TX_BITMASK, sizeof(GET_TX_BITMASK));
+
+	/* get receiver timeout value */
+	mce_async_out(ir, GET_RX_TIMEOUT, sizeof(GET_RX_TIMEOUT));
+
+	/* get receiver sensor setting */
+	mce_async_out(ir, GET_RX_SENSOR, sizeof(GET_RX_SENSOR));
+
+	for (i = 0; i < ir->num_txports; i++) {
+		cmdbuf[2] = i;
+		mce_async_out(ir, cmdbuf, sizeof(cmdbuf));
+	}
+}
+
+static void mceusb_flash_led(struct mceusb_dev *ir)
+{
+	if (ir->emver < 2)
+		return;
+
+	mce_async_out(ir, FLASH_LED, sizeof(FLASH_LED));
+}
+
+static struct rc_dev *mceusb_init_rc_dev(struct mceusb_dev *ir)
+{
+	struct usb_device *udev = ir->usbdev;
+	struct device *dev = ir->dev;
+	struct rc_dev *rc;
+	int ret;
+
+	rc = rc_allocate_device();
+	if (!rc) {
+		dev_err(dev, "remote dev allocation failed");
+		goto out;
+	}
+
+	snprintf(ir->name, sizeof(ir->name), "%s (%04x:%04x)",
+		 mceusb_model[ir->model].name ?
+			mceusb_model[ir->model].name :
+			"Media Center Ed. eHome Infrared Remote Transceiver",
+		 le16_to_cpu(ir->usbdev->descriptor.idVendor),
+		 le16_to_cpu(ir->usbdev->descriptor.idProduct));
+
+	usb_make_path(ir->usbdev, ir->phys, sizeof(ir->phys));
+
+	rc->input_name = ir->name;
+	rc->input_phys = ir->phys;
+	usb_to_input_id(ir->usbdev, &rc->input_id);
+	rc->dev.parent = dev;
+	rc->priv = ir;
+	rc->driver_type = RC_DRIVER_IR_RAW;
+	rc->allowed_protocols = RC_BIT_ALL;
+	rc->timeout = MS_TO_NS(100);
+	if (!ir->flags.no_tx) {
+		rc->s_tx_mask = mceusb_set_tx_mask;
+		rc->s_tx_carrier = mceusb_set_tx_carrier;
+		rc->tx_ir = mceusb_tx_ir;
+	}
+	rc->driver_name = DRIVER_NAME;
+
+	switch (le16_to_cpu(udev->descriptor.idVendor)) {
+	case VENDOR_HAUPPAUGE:
+		rc->map_name = RC_MAP_HAUPPAUGE;
+		break;
+	case VENDOR_PCTV:
+		rc->map_name = RC_MAP_PINNACLE_PCTV_HD;
+		break;
+	default:
+		rc->map_name = RC_MAP_RC6_MCE;
+	}
+	if (mceusb_model[ir->model].rc_map)
+		rc->map_name = mceusb_model[ir->model].rc_map;
+
+	ret = rc_register_device(rc);
+	if (ret < 0) {
+		dev_err(dev, "remote dev registration failed");
+		goto out;
+	}
+
+	return rc;
+
+out:
+	rc_free_device(rc);
+	return NULL;
+}
+
+static int mceusb_dev_probe(struct usb_interface *intf,
+			    const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_host_interface *idesc;
+	struct usb_endpoint_descriptor *ep = NULL;
+	struct usb_endpoint_descriptor *ep_in = NULL;
+	struct usb_endpoint_descriptor *ep_out = NULL;
+	struct mceusb_dev *ir = NULL;
+	int pipe, maxp, i;
+	char buf[63], name[128] = "";
+	enum mceusb_model_type model = id->driver_info;
+	bool is_gen3;
+	bool is_microsoft_gen1;
+	bool tx_mask_normal;
+	int ir_intfnum;
+
+	dev_dbg(&intf->dev, "%s called", __func__);
+
+	idesc  = intf->cur_altsetting;
+
+	is_gen3 = mceusb_model[model].mce_gen3;
+	is_microsoft_gen1 = mceusb_model[model].mce_gen1;
+	tx_mask_normal = mceusb_model[model].tx_mask_normal;
+	ir_intfnum = mceusb_model[model].ir_intfnum;
+
+	/* There are multi-function devices with non-IR interfaces */
+	if (idesc->desc.bInterfaceNumber != ir_intfnum)
+		return -ENODEV;
+
+	/* step through the endpoints to find first bulk in and out endpoint */
+	for (i = 0; i < idesc->desc.bNumEndpoints; ++i) {
+		ep = &idesc->endpoint[i].desc;
+
+		if (ep_in == NULL) {
+			if (usb_endpoint_is_bulk_in(ep)) {
+				ep_in = ep;
+				dev_dbg(&intf->dev, "acceptable bulk inbound endpoint found\n");
+			} else if (usb_endpoint_is_int_in(ep)) {
+				ep_in = ep;
+				ep_in->bInterval = 1;
+				dev_dbg(&intf->dev, "acceptable interrupt inbound endpoint found\n");
+			}
+		}
+
+		if (ep_out == NULL) {
+			if (usb_endpoint_is_bulk_out(ep)) {
+				ep_out = ep;
+				dev_dbg(&intf->dev, "acceptable bulk outbound endpoint found\n");
+			} else if (usb_endpoint_is_int_out(ep)) {
+				ep_out = ep;
+				ep_out->bInterval = 1;
+				dev_dbg(&intf->dev, "acceptable interrupt outbound endpoint found\n");
+			}
+		}
+	}
+	if (ep_in == NULL) {
+		dev_dbg(&intf->dev, "inbound and/or endpoint not found");
+		return -ENODEV;
+	}
+
+	if (usb_endpoint_xfer_int(ep_in))
+		pipe = usb_rcvintpipe(dev, ep_in->bEndpointAddress);
+	else
+		pipe = usb_rcvbulkpipe(dev, ep_in->bEndpointAddress);
+	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
+
+	ir = kzalloc(sizeof(struct mceusb_dev), GFP_KERNEL);
+	if (!ir)
+		goto mem_alloc_fail;
+
+	ir->buf_in = usb_alloc_coherent(dev, maxp, GFP_ATOMIC, &ir->dma_in);
+	if (!ir->buf_in)
+		goto buf_in_alloc_fail;
+
+	ir->urb_in = usb_alloc_urb(0, GFP_KERNEL);
+	if (!ir->urb_in)
+		goto urb_in_alloc_fail;
+
+	ir->usbdev = usb_get_dev(dev);
+	ir->dev = &intf->dev;
+	ir->len_in = maxp;
+	ir->flags.microsoft_gen1 = is_microsoft_gen1;
+	ir->flags.tx_mask_normal = tx_mask_normal;
+	ir->flags.no_tx = mceusb_model[model].no_tx;
+	ir->model = model;
+
+	/* Saving usb interface data for use by the transmitter routine */
+	ir->usb_ep_out = ep_out;
+
+	if (dev->descriptor.iManufacturer
+	    && usb_string(dev, dev->descriptor.iManufacturer,
+			  buf, sizeof(buf)) > 0)
+		strlcpy(name, buf, sizeof(name));
+	if (dev->descriptor.iProduct
+	    && usb_string(dev, dev->descriptor.iProduct,
+			  buf, sizeof(buf)) > 0)
+		snprintf(name + strlen(name), sizeof(name) - strlen(name),
+			 " %s", buf);
+
+	ir->rc = mceusb_init_rc_dev(ir);
+	if (!ir->rc)
+		goto rc_dev_fail;
+
+	/* wire up inbound data handler */
+	usb_fill_int_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp,
+				mceusb_dev_recv, ir, ep_in->bInterval);
+	ir->urb_in->transfer_dma = ir->dma_in;
+	ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	/* flush buffers on the device */
+	dev_dbg(&intf->dev, "Flushing receive buffers\n");
+	mce_flush_rx_buffer(ir, maxp);
+
+	/* figure out which firmware/emulator version this hardware has */
+	mceusb_get_emulator_version(ir);
+
+	/* initialize device */
+	if (ir->flags.microsoft_gen1)
+		mceusb_gen1_init(ir);
+	else if (!is_gen3)
+		mceusb_gen2_init(ir);
+
+	mceusb_get_parameters(ir);
+
+	mceusb_flash_led(ir);
+
+	if (!ir->flags.no_tx)
+		mceusb_set_tx_mask(ir->rc, MCE_DEFAULT_TX_MASK);
+
+	usb_set_intfdata(intf, ir);
+
+	/* enable wake via this device */
+	device_set_wakeup_capable(ir->dev, true);
+	device_set_wakeup_enable(ir->dev, true);
+
+	dev_info(&intf->dev, "Registered %s with mce emulator interface version %x",
+		name, ir->emver);
+	dev_info(&intf->dev, "%x tx ports (0x%x cabled) and %x rx sensors (0x%x active)",
+		 ir->num_txports, ir->txports_cabled,
+		 ir->num_rxports, ir->rxports_active);
+
+	return 0;
+
+	/* Error-handling path */
+rc_dev_fail:
+	usb_put_dev(ir->usbdev);
+	usb_free_urb(ir->urb_in);
+urb_in_alloc_fail:
+	usb_free_coherent(dev, maxp, ir->buf_in, ir->dma_in);
+buf_in_alloc_fail:
+	kfree(ir);
+mem_alloc_fail:
+	dev_err(&intf->dev, "%s: device setup failed!", __func__);
+
+	return -ENOMEM;
+}
+
+
+static void mceusb_dev_disconnect(struct usb_interface *intf)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct mceusb_dev *ir = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+
+	if (!ir)
+		return;
+
+	ir->usbdev = NULL;
+	rc_unregister_device(ir->rc);
+	usb_kill_urb(ir->urb_in);
+	usb_free_urb(ir->urb_in);
+	usb_free_coherent(dev, ir->len_in, ir->buf_in, ir->dma_in);
+	usb_put_dev(dev);
+
+	kfree(ir);
+}
+
+static int mceusb_dev_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct mceusb_dev *ir = usb_get_intfdata(intf);
+	dev_info(ir->dev, "suspend");
+	usb_kill_urb(ir->urb_in);
+	return 0;
+}
+
+static int mceusb_dev_resume(struct usb_interface *intf)
+{
+	struct mceusb_dev *ir = usb_get_intfdata(intf);
+	dev_info(ir->dev, "resume");
+	if (usb_submit_urb(ir->urb_in, GFP_ATOMIC))
+		return -EIO;
+	return 0;
+}
+
+static struct usb_driver mceusb_dev_driver = {
+	.name =		DRIVER_NAME,
+	.probe =	mceusb_dev_probe,
+	.disconnect =	mceusb_dev_disconnect,
+	.suspend =	mceusb_dev_suspend,
+	.resume =	mceusb_dev_resume,
+	.reset_resume =	mceusb_dev_resume,
+	.id_table =	mceusb_dev_table
+};
+
+module_usb_driver(mceusb_dev_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(usb, mceusb_dev_table);