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kernel/drivers/media/rc/mceusb.c

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init repo.
2024-07-22 17:22:30 +08:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <linux/pm_wakeup.h>
#include <media/rc-core.h>
#define DRIVER_VERSION "1.95"
#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_TX_TIMEOUT 1000 /* in milliseconds */
#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_IRBUF_SIZE 128 /* TX IR buffer length */
#define MCE_TIME_UNIT 50 /* Approx 50us resolution */
#define MCE_PACKET_SIZE 31 /* Max length of packet (with header) */
#define MCE_IRDATA_HEADER (0x80 + MCE_PACKET_SIZE - 1)
/* Actual 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 through 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 */
#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
#define VENDOR_ADAPTEC 0x03f3
enum mceusb_model_type {
MCE_GEN2 = 0, /* Most boards */
MCE_GEN1,
MCE_GEN3,
MCE_GEN3_BROKEN_IRTIMEOUT,
MCE_GEN2_TX_INV,
MCE_GEN2_TX_INV_RX_GOOD,
POLARIS_EVK,
CX_HYBRID_TV,
MULTIFUNCTION,
TIVO_KIT,
MCE_GEN2_NO_TX,
HAUPPAUGE_CX_HYBRID_TV,
EVROMEDIA_FULL_HYBRID_FULLHD,
ASTROMETA_T2HYBRID,
};
struct mceusb_model {
u32 mce_gen1:1;
u32 mce_gen2:1;
u32 mce_gen3:1;
u32 tx_mask_normal:1;
u32 no_tx:1;
u32 broken_irtimeout:1;
/*
* 2nd IR receiver (short-range, wideband) for learning mode:
* 0, absent 2nd receiver (rx2)
* 1, rx2 present
* 2, rx2 which under counts IR carrier cycles
*/
u32 rx2;
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,
.rx2 = 2,
},
[MCE_GEN2] = {
.mce_gen2 = 1,
.rx2 = 2,
},
[MCE_GEN2_NO_TX] = {
.mce_gen2 = 1,
.no_tx = 1,
},
[MCE_GEN2_TX_INV] = {
.mce_gen2 = 1,
.tx_mask_normal = 1,
.rx2 = 1,
},
[MCE_GEN2_TX_INV_RX_GOOD] = {
.mce_gen2 = 1,
.tx_mask_normal = 1,
.rx2 = 2,
},
[MCE_GEN3] = {
.mce_gen3 = 1,
.tx_mask_normal = 1,
.rx2 = 2,
},
[MCE_GEN3_BROKEN_IRTIMEOUT] = {
.mce_gen3 = 1,
.tx_mask_normal = 1,
.rx2 = 2,
.broken_irtimeout = 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",
.rx2 = 2,
},
[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,
.rx2 = 2,
},
[TIVO_KIT] = {
.mce_gen2 = 1,
.rc_map = RC_MAP_TIVO,
.rx2 = 2,
},
[EVROMEDIA_FULL_HYBRID_FULLHD] = {
.name = "Evromedia USB Full Hybrid Full HD",
.no_tx = 1,
.rc_map = RC_MAP_MSI_DIGIVOX_III,
},
[ASTROMETA_T2HYBRID] = {
.name = "Astrometa T2Hybrid",
.no_tx = 1,
.rc_map = RC_MAP_ASTROMETA_T2HYBRID,
}
};
static const 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_RX_GOOD },
/* 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 },
/* SMK RXX6000 Infrared Receiver */
{ USB_DEVICE(VENDOR_SMK, 0x0357),
.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_BROKEN_IRTIMEOUT },
/* 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 },
/* Hauppauge WinTV-HVR-935C - based on cx231xx */
{ USB_DEVICE(VENDOR_HAUPPAUGE, 0xb151),
.driver_info = HAUPPAUGE_CX_HYBRID_TV },
/* Hauppauge WinTV-HVR-955Q - based on cx231xx */
{ USB_DEVICE(VENDOR_HAUPPAUGE, 0xb123),
.driver_info = HAUPPAUGE_CX_HYBRID_TV },
/* Hauppauge WinTV-HVR-975 - based on cx231xx */
{ USB_DEVICE(VENDOR_HAUPPAUGE, 0xb150),
.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 },
/* Adaptec / HP eHome Receiver */
{ USB_DEVICE(VENDOR_ADAPTEC, 0x0094) },
/* Evromedia USB Full Hybrid Full HD */
{ USB_DEVICE(0x1b80, 0xd3b2),
.driver_info = EVROMEDIA_FULL_HYBRID_FULLHD },
/* Astrometa T2hybrid */
{ USB_DEVICE(0x15f4, 0x0135),
.driver_info = ASTROMETA_T2HYBRID },
/* 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 wideband_rx_enabled; /* aka learning mode, short-range rx */
/* core device bits */
struct device *dev;
/* usb */
struct usb_device *usbdev;
struct usb_interface *usbintf;
struct urb *urb_in;
unsigned int pipe_in;
struct usb_endpoint_descriptor *usb_ep_out;
unsigned int pipe_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;
u32 rx2;
} flags;
/* transmit support */
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 */
bool learning_active; /* wideband rx is active */
/* receiver carrier frequency detection support */
u32 pulse_tunit; /* IR pulse "on" cumulative time units */
u32 pulse_count; /* pulse "on" count in measurement interval */
/*
* support for async error handler mceusb_deferred_kevent()
* where usb_clear_halt(), usb_reset_configuration(),
* usb_reset_device(), etc. must be done in process context
*/
struct work_struct kevent;
unsigned long kevent_flags;
# define EVENT_TX_HALT 0
# define EVENT_RX_HALT 1
# define EVENT_RST_PEND 31
};
/* 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 = 4;
break;
case MCE_RSP_EQWAKESUPPORT:
case MCE_RSP_GETWAKESOURCE:
case MCE_RSP_EQDEVDETAILS:
case MCE_RSP_EQEMVER:
datasize = 1;
break;
}
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, u8 *buf, int buf_len,
int offset, int len, bool out)
{
#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
char *inout;
u8 cmd, subcmd, *data;
struct device *dev = ir->dev;
u32 carrier, period;
if (offset < 0 || offset >= buf_len)
return;
dev_dbg(dev, "%cx data[%d]: %*ph (len=%d sz=%d)",
(out ? 't' : 'r'), offset,
min(len, buf_len - offset), buf + offset, len, buf_len);
inout = out ? "Request" : "Got";
cmd = buf[offset];
subcmd = (offset + 1 < buf_len) ? buf[offset + 1] : 0;
data = &buf[offset] + 2;
/* Trace meaningless 0xb1 0x60 header bytes on original receiver */
if (ir->flags.microsoft_gen1 && !out && !offset) {
dev_dbg(dev, "MCE gen 1 header");
return;
}
/* Trace IR data header or trailer */
if (cmd != MCE_CMD_PORT_IR &&
(cmd & MCE_PORT_MASK) == MCE_COMMAND_IRDATA) {
if (cmd == MCE_IRDATA_TRAILER)
dev_dbg(dev, "End of raw IR data");
else
dev_dbg(dev, "Raw IR data, %d pulse/space samples",
cmd & MCE_PACKET_LENGTH_MASK);
return;
}
/* Unexpected end of buffer? */
if (offset + len > buf_len)
return;
/* Decode MCE command/response */
switch (cmd) {
case MCE_CMD_NULL:
if (subcmd == MCE_CMD_NULL)
break;
if ((subcmd == MCE_CMD_PORT_SYS) &&
(data[0] == 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",
data[0]);
break;
case MCE_CMD_G_REVISION:
if (len == 2)
dev_dbg(dev, "Get hw/sw rev?");
else
dev_dbg(dev, "hw/sw rev %*ph",
4, &buf[offset + 2]);
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",
data[0], data[1], data[2], data[3]);
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",
data[0] + 1, data[3] ? " 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",
data[0], data[1]);
break;
case MCE_RSP_EQIRCFS:
if (!data[0] && !data[1]) {
dev_dbg(dev, "%s: no carrier", inout);
break;
}
// prescaler should make sense
if (data[0] > 8)
break;
period = DIV_ROUND_CLOSEST((1U << data[0] * 2) *
(data[1] + 1), 10);
if (!period)
break;
carrier = USEC_PER_SEC / 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, data[0]);
break;
case MCE_RSP_EQIRTIMEOUT:
/* value is in units of 50us, so x*50/1000 ms */
period = ((data[0] << 8) | data[1]) *
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, data[0] == 0x02 ? "short" : "long");
break;
case MCE_CMD_GETIRRXPORTEN:
/* aka MCE_RSP_EQIRRXCFCNT */
if (out)
dev_dbg(dev, "Get receive sensor");
else
dev_dbg(dev, "RX carrier cycle count: %d",
((data[0] << 8) | data[1]));
break;
case MCE_RSP_EQIRNUMPORTS:
if (out)
break;
dev_dbg(dev, "Num TX ports: %x, num RX ports: %x",
data[0], data[1]);
break;
case MCE_RSP_CMD_ILLEGAL:
dev_dbg(dev, "Illegal PORT_IR command");
break;
case MCE_RSP_TX_TIMEOUT:
dev_dbg(dev, "IR TX timeout (TX buffer underrun)");
break;
default:
dev_dbg(dev, "Unknown command 0x%02x 0x%02x",
cmd, subcmd);
break;
}
break;
default:
break;
}
#endif
}
/*
* Schedule work that can't be done in interrupt handlers
* (mceusb_dev_recv() and mce_write_callback()) nor tasklets.
* Invokes mceusb_deferred_kevent() for recovering from
* error events specified by the kevent bit field.
*/
static void mceusb_defer_kevent(struct mceusb_dev *ir, int kevent)
{
set_bit(kevent, &ir->kevent_flags);
if (test_bit(EVENT_RST_PEND, &ir->kevent_flags)) {
dev_dbg(ir->dev, "kevent %d dropped pending USB Reset Device",
kevent);
return;
}
if (!schedule_work(&ir->kevent))
dev_dbg(ir->dev, "kevent %d already scheduled", kevent);
else
dev_dbg(ir->dev, "kevent %d scheduled", kevent);
}
static void mce_write_callback(struct urb *urb)
{
if (!urb)
return;
complete(urb->context);
}
/*
* Write (TX/send) data to MCE device USB endpoint out.
* Used for IR blaster TX and MCE device commands.
*
* Return: The number of bytes written (> 0) or errno (< 0).
*/
static int mce_write(struct mceusb_dev *ir, u8 *data, int size)
{
int ret;
struct urb *urb;
struct device *dev = ir->dev;
unsigned char *buf_out;
struct completion tx_done;
unsigned long expire;
unsigned long ret_wait;
mceusb_dev_printdata(ir, data, size, 0, size, true);
urb = usb_alloc_urb(0, GFP_KERNEL);
if (unlikely(!urb)) {
dev_err(dev, "Error: mce write couldn't allocate urb");
return -ENOMEM;
}
buf_out = kmalloc(size, GFP_KERNEL);
if (!buf_out) {
usb_free_urb(urb);
return -ENOMEM;
}
init_completion(&tx_done);
/* outbound data */
if (usb_endpoint_xfer_int(ir->usb_ep_out))
usb_fill_int_urb(urb, ir->usbdev, ir->pipe_out,
buf_out, size, mce_write_callback, &tx_done,
ir->usb_ep_out->bInterval);
else
usb_fill_bulk_urb(urb, ir->usbdev, ir->pipe_out,
buf_out, size, mce_write_callback, &tx_done);
memcpy(buf_out, data, size);
ret = usb_submit_urb(urb, GFP_KERNEL);
if (ret) {
dev_err(dev, "Error: mce write submit urb error = %d", ret);
kfree(buf_out);
usb_free_urb(urb);
return ret;
}
expire = msecs_to_jiffies(USB_TX_TIMEOUT);
ret_wait = wait_for_completion_timeout(&tx_done, expire);
if (!ret_wait) {
dev_err(dev, "Error: mce write timed out (expire = %lu (%dms))",
expire, USB_TX_TIMEOUT);
usb_kill_urb(urb);
ret = (urb->status == -ENOENT ? -ETIMEDOUT : urb->status);
} else {
ret = urb->status;
}
if (ret >= 0)
ret = urb->actual_length; /* bytes written */
switch (urb->status) {
/* success */
case 0:
break;
case -ECONNRESET:
case -ENOENT:
case -EILSEQ:
case -ESHUTDOWN:
break;
case -EPIPE:
dev_err(ir->dev, "Error: mce write urb status = %d (TX HALT)",
urb->status);
mceusb_defer_kevent(ir, EVENT_TX_HALT);
break;
default:
dev_err(ir->dev, "Error: mce write urb status = %d",
urb->status);
break;
}
dev_dbg(dev, "tx done status = %d (wait = %lu, expire = %lu (%dms), urb->actual_length = %d, urb->status = %d)",
ret, ret_wait, expire, USB_TX_TIMEOUT,
urb->actual_length, urb->status);
kfree(buf_out);
usb_free_urb(urb);
return ret;
}
static void mce_command_out(struct mceusb_dev *ir, u8 *data, int size)
{
int rsize = sizeof(DEVICE_RESUME);
if (ir->need_reset) {
ir->need_reset = false;
mce_write(ir, DEVICE_RESUME, rsize);
msleep(10);
}
mce_write(ir, data, size);
msleep(10);
}
/*
* Transmit IR out the MCE device IR blaster port(s).
*
* Convert IR pulse/space sequence from LIRC to MCE format.
* Break up a long IR sequence into multiple parts (MCE IR data packets).
*
* u32 txbuf[] consists of IR pulse, space, ..., and pulse times in usec.
* Pulses and spaces are implicit by their position.
* The first IR sample, txbuf[0], is always a pulse.
*
* u8 irbuf[] consists of multiple IR data packets for the MCE device.
* A packet is 1 u8 MCE_IRDATA_HEADER and up to 30 u8 IR samples.
* An IR sample is 1-bit pulse/space flag with 7-bit time
* in MCE time units (50usec).
*
* Return: The number of IR samples sent (> 0) or errno (< 0).
*/
static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
{
struct mceusb_dev *ir = dev->priv;
u8 cmdbuf[3] = { MCE_CMD_PORT_IR, MCE_CMD_SETIRTXPORTS, 0x00 };
u8 irbuf[MCE_IRBUF_SIZE];
int ircount = 0;
unsigned int irsample;
int i, length, ret;
/* Send the set TX ports command */
cmdbuf[2] = ir->tx_mask;
mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
/* Generate mce IR data packet */
for (i = 0; i < count; i++) {
irsample = txbuf[i] / MCE_TIME_UNIT;
/* loop to support long pulses/spaces > 6350us (127*50us) */
while (irsample > 0) {
/* Insert IR header every 30th entry */
if (ircount % MCE_PACKET_SIZE == 0) {
/* Room for IR header and one IR sample? */
if (ircount >= MCE_IRBUF_SIZE - 1) {
/* Send near full buffer */
ret = mce_write(ir, irbuf, ircount);
if (ret < 0)
return ret;
ircount = 0;
}
irbuf[ircount++] = MCE_IRDATA_HEADER;
}
/* Insert IR sample */
if (irsample <= MCE_MAX_PULSE_LENGTH) {
irbuf[ircount] = irsample;
irsample = 0;
} else {
irbuf[ircount] = MCE_MAX_PULSE_LENGTH;
irsample -= MCE_MAX_PULSE_LENGTH;
}
/*
* Even i = IR pulse
* Odd i = IR space
*/
irbuf[ircount] |= (i & 1 ? 0 : MCE_PULSE_BIT);
ircount++;
/* IR buffer full? */
if (ircount >= MCE_IRBUF_SIZE) {
/* Fix packet length in last header */
length = ircount % MCE_PACKET_SIZE;
if (length > 0)
irbuf[ircount - length] -=
MCE_PACKET_SIZE - length;
/* Send full buffer */
ret = mce_write(ir, irbuf, ircount);
if (ret < 0)
return ret;
ircount = 0;
}
}
} /* after for loop, 0 <= ircount < MCE_IRBUF_SIZE */
/* Fix packet length in last header */
length = ircount % MCE_PACKET_SIZE;
if (length > 0)
irbuf[ircount - length] -= MCE_PACKET_SIZE - length;
/* Append IR trailer (0x80) to final partial (or empty) IR buffer */
irbuf[ircount++] = MCE_IRDATA_TRAILER;
/* Send final buffer */
ret = mce_write(ir, irbuf, ircount);
if (ret < 0)
return ret;
return 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;
/* return number of transmitters */
int emitters = ir->num_txports ? ir->num_txports : 2;
if (mask >= (1 << emitters))
return emitters;
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_command_out(ir, cmdbuf, sizeof(cmdbuf));
return 0;
}
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_command_out(ir, cmdbuf, sizeof(cmdbuf));
return 0;
}
}
return -EINVAL;
}
return 0;
}
static int mceusb_set_timeout(struct rc_dev *dev, unsigned int timeout)
{
u8 cmdbuf[4] = { MCE_CMD_PORT_IR, MCE_CMD_SETIRTIMEOUT, 0, 0 };
struct mceusb_dev *ir = dev->priv;
unsigned int units;
units = DIV_ROUND_UP(timeout, MCE_TIME_UNIT);
cmdbuf[2] = units >> 8;
cmdbuf[3] = units;
mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
/* get receiver timeout value */
mce_command_out(ir, GET_RX_TIMEOUT, sizeof(GET_RX_TIMEOUT));
return 0;
}
/*
* Select or deselect the 2nd receiver port.
* Second receiver is learning mode, wide-band, short-range receiver.
* Only one receiver (long or short range) may be active at a time.
*/
static int mceusb_set_rx_wideband(struct rc_dev *dev, int enable)
{
struct mceusb_dev *ir = dev->priv;
unsigned char cmdbuf[3] = { MCE_CMD_PORT_IR,
MCE_CMD_SETIRRXPORTEN, 0x00 };
dev_dbg(ir->dev, "select %s-range receive sensor",
enable ? "short" : "long");
if (enable) {
ir->wideband_rx_enabled = true;
cmdbuf[2] = 2; /* port 2 is short range receiver */
} else {
ir->wideband_rx_enabled = false;
cmdbuf[2] = 1; /* port 1 is long range receiver */
}
mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
/* response from device sets ir->learning_active */
return 0;
}
/*
* Enable/disable receiver carrier frequency pass through reporting.
* Only the short-range receiver has carrier frequency measuring capability.
* Implicitly select this receiver when enabling carrier frequency reporting.
*/
static int mceusb_set_rx_carrier_report(struct rc_dev *dev, int enable)
{
struct mceusb_dev *ir = dev->priv;
unsigned char cmdbuf[3] = { MCE_CMD_PORT_IR,
MCE_CMD_SETIRRXPORTEN, 0x00 };
dev_dbg(ir->dev, "%s short-range receiver carrier reporting",
enable ? "enable" : "disable");
if (enable) {
ir->carrier_report_enabled = true;
if (!ir->learning_active) {
cmdbuf[2] = 2; /* port 2 is short range receiver */
mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
}
} else {
ir->carrier_report_enabled = false;
/*
* Revert to normal (long-range) receiver only if the
* wideband (short-range) receiver wasn't explicitly
* enabled.
*/
if (ir->learning_active && !ir->wideband_rx_enabled) {
cmdbuf[2] = 1; /* port 1 is long range receiver */
mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
}
}
return 0;
}
/*
* Handle PORT_SYS/IR command response received from the MCE device.
*
* Assumes single response with all its data (not truncated)
* in buf_in[]. The response itself determines its total length
* (mceusb_cmd_datasize() + 2) and hence the minimum size of buf_in[].
*
* 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, u8 *buf_in)
{
u8 cmd = buf_in[0];
u8 subcmd = buf_in[1];
u8 *hi = &buf_in[2]; /* read only when required */
u8 *lo = &buf_in[3]; /* read only when required */
struct ir_raw_event rawir = {};
u32 carrier_cycles;
u32 cycles_fix;
if (cmd == MCE_CMD_PORT_SYS) {
switch (subcmd) {
/* the one and only 5-byte return value command */
case MCE_RSP_GETPORTSTATUS:
if (buf_in[5] == 0 && *hi < 8)
ir->txports_cabled |= 1 << *hi;
break;
/* 1-byte return value commands */
case MCE_RSP_EQEMVER:
ir->emver = *hi;
break;
/* No return value commands */
case MCE_RSP_CMD_ILLEGAL:
ir->need_reset = true;
break;
default:
break;
}
return;
}
if (cmd != MCE_CMD_PORT_IR)
return;
switch (subcmd) {
/* 2-byte return value commands */
case MCE_RSP_EQIRTIMEOUT:
ir->rc->timeout = (*hi << 8 | *lo) * MCE_TIME_UNIT;
break;
case MCE_RSP_EQIRNUMPORTS:
ir->num_txports = *hi;
ir->num_rxports = *lo;
break;
case MCE_RSP_EQIRRXCFCNT:
/*
* The carrier cycle counter can overflow and wrap around
* without notice from the device. So frequency measurement
* will be inaccurate with long duration IR.
*
* The long-range (non learning) receiver always reports
* zero count so we always ignore its report.
*/
if (ir->carrier_report_enabled && ir->learning_active &&
ir->pulse_tunit > 0) {
carrier_cycles = (*hi << 8 | *lo);
/*
* Adjust carrier cycle count by adding
* 1 missed count per pulse "on"
*/
cycles_fix = ir->flags.rx2 == 2 ? ir->pulse_count : 0;
rawir.carrier_report = 1;
rawir.carrier = (1000000u / MCE_TIME_UNIT) *
(carrier_cycles + cycles_fix) /
ir->pulse_tunit;
dev_dbg(ir->dev, "RX carrier frequency %u Hz (pulse count = %u, cycles = %u, duration = %u, rx2 = %u)",
rawir.carrier, ir->pulse_count, carrier_cycles,
ir->pulse_tunit, ir->flags.rx2);
ir_raw_event_store(ir->rc, &rawir);
}
break;
/* 1-byte return value commands */
case MCE_RSP_EQIRTXPORTS:
ir->tx_mask = *hi;
break;
case MCE_RSP_EQIRRXPORTEN:
ir->learning_active = ((*hi & 0x02) == 0x02);
if (ir->rxports_active != *hi) {
dev_info(ir->dev, "%s-range (0x%x) receiver active",
ir->learning_active ? "short" : "long", *hi);
ir->rxports_active = *hi;
}
break;
/* No return value commands */
case MCE_RSP_CMD_ILLEGAL:
case MCE_RSP_TX_TIMEOUT:
ir->need_reset = true;
break;
default:
break;
}
}
static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len)
{
struct 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, buf_len, i - 1,
ir->rem + 2, false);
if (i + ir->rem < buf_len)
mceusb_handle_command(ir, &ir->buf_in[i - 1]);
ir->parser_state = CMD_DATA;
break;
case PARSE_IRDATA:
ir->rem--;
rawir.pulse = ((ir->buf_in[i] & MCE_PULSE_BIT) != 0);
rawir.duration = (ir->buf_in[i] & MCE_PULSE_MASK);
if (unlikely(!rawir.duration)) {
dev_dbg(ir->dev, "nonsensical irdata %02x with duration 0",
ir->buf_in[i]);
break;
}
if (rawir.pulse) {
ir->pulse_tunit += rawir.duration;
ir->pulse_count++;
}
rawir.duration *= MCE_TIME_UNIT;
dev_dbg(ir->dev, "Storing %s %u us (%02x)",
rawir.pulse ? "pulse" : "space",
rawir.duration, ir->buf_in[i]);
if (ir_raw_event_store_with_filter(ir->rc, &rawir))
event = true;
break;
case CMD_DATA:
ir->rem--;
break;
case CMD_HEADER:
ir->cmd = ir->buf_in[i];
if ((ir->cmd == MCE_CMD_PORT_IR) ||
((ir->cmd & MCE_PORT_MASK) !=
MCE_COMMAND_IRDATA)) {
/*
* got PORT_SYS, PORT_IR, or unknown
* command response prefix
*/
ir->parser_state = SUBCMD;
continue;
}
/*
* got IR data prefix (0x80 + num_bytes)
* decode MCE packets of the form {0x83, AA, BB, CC}
* IR data packets can span USB messages
*/
ir->rem = (ir->cmd & MCE_PACKET_LENGTH_MASK);
mceusb_dev_printdata(ir, ir->buf_in, buf_len,
i, ir->rem + 1, false);
if (ir->rem) {
ir->parser_state = PARSE_IRDATA;
} else {
struct ir_raw_event ev = {
.timeout = 1,
.duration = ir->rc->timeout
};
if (ir_raw_event_store_with_filter(ir->rc,
&ev))
event = true;
ir->pulse_tunit = 0;
ir->pulse_count = 0;
}
break;
}
if (ir->parser_state != CMD_HEADER && !ir->rem)
ir->parser_state = CMD_HEADER;
}
/*
* Accept IR data spanning multiple rx buffers.
* Reject MCE command response spanning multiple rx buffers.
*/
if (ir->parser_state != PARSE_IRDATA || !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;
if (!urb)
return;
ir = urb->context;
if (!ir) {
usb_unlink_urb(urb);
return;
}
switch (urb->status) {
/* success */
case 0:
mceusb_process_ir_data(ir, urb->actual_length);
break;
case -ECONNRESET:
case -ENOENT:
case -EILSEQ:
case -EPROTO:
case -ESHUTDOWN:
usb_unlink_urb(urb);
return;
case -EPIPE:
dev_err(ir->dev, "Error: urb status = %d (RX HALT)",
urb->status);
mceusb_defer_kevent(ir, EVENT_RX_HALT);
return;
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_command_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[USB_CTRL_MSG_SZ];
/*
* 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_recv(ir->usbdev, 0, USB_REQ_SET_ADDRESS,
USB_DIR_IN | USB_TYPE_VENDOR,
0, 0, data, USB_CTRL_MSG_SZ, 3000,
GFP_KERNEL);
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_send(ir->usbdev, 0,
USB_REQ_SET_FEATURE, USB_TYPE_VENDOR,
0xc04e, 0x0000, NULL, 0, 3000, GFP_KERNEL);
dev_dbg(dev, "set feature - ret = %d", ret);
/* bRequest 4: set char length to 8 bits */
ret = usb_control_msg_send(ir->usbdev, 0,
4, USB_TYPE_VENDOR,
0x0808, 0x0000, NULL, 0, 3000, GFP_KERNEL);
dev_dbg(dev, "set char length - retB = %d", ret);
/* bRequest 2: set handshaking to use DTR/DSR */
ret = usb_control_msg_send(ir->usbdev, 0,
2, USB_TYPE_VENDOR,
0x0000, 0x0100, NULL, 0, 3000, GFP_KERNEL);
dev_dbg(dev, "set handshake - retC = %d", ret);
/* device resume */
mce_command_out(ir, DEVICE_RESUME, sizeof(DEVICE_RESUME));
/* get hw/sw revision? */
mce_command_out(ir, GET_REVISION, sizeof(GET_REVISION));
}
static void mceusb_gen2_init(struct mceusb_dev *ir)
{
/* device resume */
mce_command_out(ir, DEVICE_RESUME, sizeof(DEVICE_RESUME));
/* get wake version (protocol, key, address) */
mce_command_out(ir, GET_WAKEVERSION, sizeof(GET_WAKEVERSION));
/* unknown what this one actually returns... */
mce_command_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_command_out(ir, GET_NUM_PORTS, sizeof(GET_NUM_PORTS));
/* get the carrier and frequency */
mce_command_out(ir, GET_CARRIER_FREQ, sizeof(GET_CARRIER_FREQ));
if (ir->num_txports && !ir->flags.no_tx)
/* get the transmitter bitmask */
mce_command_out(ir, GET_TX_BITMASK, sizeof(GET_TX_BITMASK));
/* get receiver timeout value */
mce_command_out(ir, GET_RX_TIMEOUT, sizeof(GET_RX_TIMEOUT));
/* get receiver sensor setting */
mce_command_out(ir, GET_RX_SENSOR, sizeof(GET_RX_SENSOR));
for (i = 0; i < ir->num_txports; i++) {
cmdbuf[2] = i;
mce_command_out(ir, cmdbuf, sizeof(cmdbuf));
}
}
static void mceusb_flash_led(struct mceusb_dev *ir)
{
if (ir->emver < 2)
return;
mce_command_out(ir, FLASH_LED, sizeof(FLASH_LED));
}
/*
* Workqueue function
* for resetting or recovering device after occurrence of error events
* specified in ir->kevent bit field.
* Function runs (via schedule_work()) in non-interrupt context, for
* calls here (such as usb_clear_halt()) requiring non-interrupt context.
*/
static void mceusb_deferred_kevent(struct work_struct *work)
{
struct mceusb_dev *ir =
container_of(work, struct mceusb_dev, kevent);
int status;
dev_err(ir->dev, "kevent handler called (flags 0x%lx)",
ir->kevent_flags);
if (test_bit(EVENT_RST_PEND, &ir->kevent_flags)) {
dev_err(ir->dev, "kevent handler canceled pending USB Reset Device");
return;
}
if (test_bit(EVENT_RX_HALT, &ir->kevent_flags)) {
usb_unlink_urb(ir->urb_in);
status = usb_clear_halt(ir->usbdev, ir->pipe_in);
dev_err(ir->dev, "rx clear halt status = %d", status);
if (status < 0) {
/*
* Unable to clear RX halt/stall.
* Will need to call usb_reset_device().
*/
dev_err(ir->dev,
"stuck RX HALT state requires USB Reset Device to clear");
usb_queue_reset_device(ir->usbintf);
set_bit(EVENT_RST_PEND, &ir->kevent_flags);
clear_bit(EVENT_RX_HALT, &ir->kevent_flags);
/* Cancel all other error events and handlers */
clear_bit(EVENT_TX_HALT, &ir->kevent_flags);
return;
}
clear_bit(EVENT_RX_HALT, &ir->kevent_flags);
status = usb_submit_urb(ir->urb_in, GFP_KERNEL);
if (status < 0) {
dev_err(ir->dev, "rx unhalt submit urb error = %d",
status);
}
}
if (test_bit(EVENT_TX_HALT, &ir->kevent_flags)) {
status = usb_clear_halt(ir->usbdev, ir->pipe_out);
dev_err(ir->dev, "tx clear halt status = %d", status);
if (status < 0) {
/*
* Unable to clear TX halt/stall.
* Will need to call usb_reset_device().
*/
dev_err(ir->dev,
"stuck TX HALT state requires USB Reset Device to clear");
usb_queue_reset_device(ir->usbintf);
set_bit(EVENT_RST_PEND, &ir->kevent_flags);
clear_bit(EVENT_TX_HALT, &ir->kevent_flags);
/* Cancel all other error events and handlers */
clear_bit(EVENT_RX_HALT, &ir->kevent_flags);
return;
}
clear_bit(EVENT_TX_HALT, &ir->kevent_flags);
}
}
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(RC_DRIVER_IR_RAW);
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->device_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->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
rc->min_timeout = MCE_TIME_UNIT;
rc->timeout = MS_TO_US(100);
if (!mceusb_model[ir->model].broken_irtimeout) {
rc->s_timeout = mceusb_set_timeout;
rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
} else {
/*
* If we can't set the timeout using CMD_SETIRTIMEOUT, we can
* rely on software timeouts for timeouts < 100ms.
*/
rc->max_timeout = rc->timeout;
}
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;
}
if (ir->flags.rx2 > 0) {
rc->s_wideband_receiver = mceusb_set_rx_wideband;
rc->s_carrier_report = mceusb_set_rx_carrier_report;
}
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, res;
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 || !ep_out) {
dev_dbg(&intf->dev, "required endpoints not found\n");
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->pipe_in = pipe;
ir->buf_in = usb_alloc_coherent(dev, maxp, GFP_KERNEL, &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->usbintf = intf;
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->flags.rx2 = mceusb_model[model].rx2;
ir->model = model;
/* Saving usb interface data for use by the transmitter routine */
ir->usb_ep_out = ep_out;
if (usb_endpoint_xfer_int(ep_out))
ir->pipe_out = usb_sndintpipe(ir->usbdev,
ep_out->bEndpointAddress);
else
ir->pipe_out = usb_sndbulkpipe(ir->usbdev,
ep_out->bEndpointAddress);
if (dev->descriptor.iManufacturer
&& usb_string(dev, dev->descriptor.iManufacturer,
buf, sizeof(buf)) > 0)
strscpy(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);
/*
* Initialize async USB error handler before registering
* or activating any mceusb RX and TX functions
*/
INIT_WORK(&ir->kevent, mceusb_deferred_kevent);
ir->rc = mceusb_init_rc_dev(ir);
if (!ir->rc)
goto rc_dev_fail;
/* wire up inbound data handler */
if (usb_endpoint_xfer_int(ep_in))
usb_fill_int_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp,
mceusb_dev_recv, ir, ep_in->bInterval);
else
usb_fill_bulk_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp,
mceusb_dev_recv, ir);
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");
res = usb_submit_urb(ir->urb_in, GFP_KERNEL);
if (res)
dev_err(&intf->dev, "failed to flush buffers: %d", res);
/* 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:
cancel_work_sync(&ir->kevent);
usb_put_dev(ir->usbdev);
usb_kill_urb(ir->urb_in);
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);
dev_dbg(&intf->dev, "%s called", __func__);
usb_set_intfdata(intf, NULL);
if (!ir)
return;
ir->usbdev = NULL;
cancel_work_sync(&ir->kevent);
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);
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