Staging
v0.5.1
v0.5.1
https://github.com/torvalds/linux
Tip revision: 49553c2ef88749dd502687f4eb9c258bb10a4f44 authored by Linus Torvalds on 12 September 2010, 23:07:37 UTC
Linux 2.6.36-rc4
Linux 2.6.36-rc4
Tip revision: 49553c2
mceusb.c
/*
* Driver for USB Windows Media Center Ed. eHome Infrared Transceivers
*
* Copyright (c) 2010 by Jarod Wilson <jarod@redhat.com>
*
* Based on the original lirc_mceusb and lirc_mceusb2 drivers, by Dan
* Conti, Martin Blatter and Daniel Melander, the latter of which was
* in turn also based on the lirc_atiusb driver by Paul Miller. The
* two mce drivers were merged into one by Jarod Wilson, with transmit
* support for the 1st-gen device added primarily by Patrick Calhoun,
* with a bit of tweaks by Jarod. Debugging improvements and proper
* support for what appears to be 3rd-gen hardware added by Jarod.
* Initial port from lirc driver to ir-core drivery by Jarod, based
* partially on a port to an earlier proposed IR infrastructure by
* Jon Smirl, which included enhancements and simplifications to the
* incoming IR buffer parsing routines.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/input.h>
#include <media/ir-core.h>
#include <media/ir-common.h>
#define DRIVER_VERSION "1.91"
#define DRIVER_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
#define DRIVER_DESC "Windows Media Center Ed. eHome Infrared Transceiver " \
"device driver"
#define DRIVER_NAME "mceusb"
#define USB_BUFLEN 32 /* USB reception buffer length */
#define USB_CTRL_MSG_SZ 2 /* Size of usb ctrl msg on gen1 hw */
#define MCE_G1_INIT_MSGS 40 /* Init messages on gen1 hw to throw out */
/* MCE constants */
#define MCE_CMDBUF_SIZE 384 /* MCE Command buffer length */
#define MCE_TIME_UNIT 50 /* Approx 50us resolution */
#define MCE_CODE_LENGTH 5 /* Normal length of packet (with header) */
#define MCE_PACKET_SIZE 4 /* Normal length of packet (without header) */
#define MCE_PACKET_HEADER 0x84 /* Actual header format is 0x80 + num_bytes */
#define MCE_CONTROL_HEADER 0x9F /* MCE status header */
#define MCE_TX_HEADER_LENGTH 3 /* # of bytes in the initializing tx header */
#define MCE_MAX_CHANNELS 2 /* Two transmitters, hardware dependent? */
#define MCE_DEFAULT_TX_MASK 0x03 /* Val opts: TX1=0x01, TX2=0x02, ALL=0x03 */
#define MCE_PULSE_BIT 0x80 /* Pulse bit, MSB set == PULSE else SPACE */
#define MCE_PULSE_MASK 0x7F /* Pulse mask */
#define MCE_MAX_PULSE_LENGTH 0x7F /* Longest transmittable pulse symbol */
#define MCE_PACKET_LENGTH_MASK 0x1F /* Packet length mask */
/* module parameters */
#ifdef CONFIG_USB_DEBUG
static int debug = 1;
#else
static int debug;
#endif
/* 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
static struct usb_device_id mceusb_dev_table[] = {
/* Original Microsoft MCE IR Transceiver (often HP-branded) */
{ USB_DEVICE(VENDOR_MICROSOFT, 0x006d) },
/* Philips Infrared Transceiver - Sahara branded */
{ USB_DEVICE(VENDOR_PHILIPS, 0x0608) },
/* Philips Infrared Transceiver - HP branded */
{ USB_DEVICE(VENDOR_PHILIPS, 0x060c) },
/* 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) },
/* Realtek MCE IR Receiver */
{ USB_DEVICE(VENDOR_REALTEK, 0x0161) },
/* SMK/Toshiba G83C0004D410 */
{ USB_DEVICE(VENDOR_SMK, 0x031d) },
/* SMK eHome Infrared Transceiver (Sony VAIO) */
{ USB_DEVICE(VENDOR_SMK, 0x0322) },
/* bundled with Hauppauge PVR-150 */
{ USB_DEVICE(VENDOR_SMK, 0x0334) },
/* SMK eHome Infrared Transceiver */
{ USB_DEVICE(VENDOR_SMK, 0x0338) },
/* 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) },
/* Topseed HP eHome Infrared Transceiver */
{ USB_DEVICE(VENDOR_TOPSEED, 0x0006) },
/* Topseed eHome Infrared Transceiver */
{ USB_DEVICE(VENDOR_TOPSEED, 0x0007) },
/* Topseed eHome Infrared Transceiver */
{ USB_DEVICE(VENDOR_TOPSEED, 0x0008) },
/* Topseed eHome Infrared Transceiver */
{ USB_DEVICE(VENDOR_TOPSEED, 0x000a) },
/* Topseed eHome Infrared Transceiver */
{ USB_DEVICE(VENDOR_TOPSEED, 0x0011) },
/* 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) },
/* 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) },
/* 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) },
/* 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) },
/* Terminating entry */
{ }
};
static struct usb_device_id gen3_list[] = {
{ USB_DEVICE(VENDOR_PINNACLE, 0x0225) },
{ USB_DEVICE(VENDOR_TOPSEED, 0x0008) },
{}
};
static struct usb_device_id microsoft_gen1_list[] = {
{ USB_DEVICE(VENDOR_MICROSOFT, 0x006d) },
{}
};
static struct usb_device_id std_tx_mask_list[] = {
{ USB_DEVICE(VENDOR_MICROSOFT, 0x006d) },
{ USB_DEVICE(VENDOR_PHILIPS, 0x060c) },
{ USB_DEVICE(VENDOR_SMK, 0x031d) },
{ USB_DEVICE(VENDOR_SMK, 0x0322) },
{ USB_DEVICE(VENDOR_SMK, 0x0334) },
{ USB_DEVICE(VENDOR_TOPSEED, 0x0001) },
{ USB_DEVICE(VENDOR_TOPSEED, 0x0006) },
{ USB_DEVICE(VENDOR_TOPSEED, 0x0007) },
{ USB_DEVICE(VENDOR_TOPSEED, 0x0008) },
{ USB_DEVICE(VENDOR_TOPSEED, 0x000a) },
{ USB_DEVICE(VENDOR_TOPSEED, 0x0011) },
{ USB_DEVICE(VENDOR_PINNACLE, 0x0225) },
{}
};
/* data structure for each usb transceiver */
struct mceusb_dev {
/* ir-core bits */
struct ir_dev_props *props;
struct ir_raw_event rawir;
/* core device bits */
struct device *dev;
struct input_dev *idev;
/* usb */
struct usb_device *usbdev;
struct urb *urb_in;
struct usb_endpoint_descriptor *usb_ep_in;
struct usb_endpoint_descriptor *usb_ep_out;
/* buffers and dma */
unsigned char *buf_in;
unsigned int len_in;
u8 cmd; /* MCE command type */
u8 rem; /* Remaining IR data bytes in packet */
dma_addr_t dma_in;
dma_addr_t dma_out;
struct {
u32 connected:1;
u32 tx_mask_inverted:1;
u32 microsoft_gen1:1;
u32 reserved:29;
} flags;
/* transmit support */
int send_flags;
u32 carrier;
unsigned char tx_mask;
char name[128];
char phys[64];
};
/*
* MCE Device Command Strings
* Device command responses vary from device to device...
* - DEVICE_RESET resets the hardware to its default state
* - GET_REVISION fetches the hardware/software revision, common
* replies are ff 0b 45 ff 1b 08 and ff 0b 50 ff 1b 42
* - GET_CARRIER_FREQ gets the carrier mode and frequency of the
* device, with replies in the form of 9f 06 MM FF, where MM is 0-3,
* meaning clk of 10000000, 2500000, 625000 or 156250, and FF is
* ((clk / frequency) - 1)
* - GET_RX_TIMEOUT fetches the receiver timeout in units of 50us,
* response in the form of 9f 0c msb lsb
* - GET_TX_BITMASK fetches the transmitter bitmask, replies in
* the form of 9f 08 bm, where bm is the bitmask
* - GET_RX_SENSOR fetches the RX sensor setting -- long-range
* general use one or short-range learning one, in the form of
* 9f 14 ss, where ss is either 01 for long-range or 02 for short
* - SET_CARRIER_FREQ sets a new carrier mode and frequency
* - SET_TX_BITMASK sets the transmitter bitmask
* - SET_RX_TIMEOUT sets the receiver timeout
* - SET_RX_SENSOR sets which receiver sensor to use
*/
static char DEVICE_RESET[] = {0x00, 0xff, 0xaa};
static char GET_REVISION[] = {0xff, 0x0b};
static char GET_UNKNOWN[] = {0xff, 0x18};
static char GET_UNKNOWN2[] = {0x9f, 0x05};
static char GET_CARRIER_FREQ[] = {0x9f, 0x07};
static char GET_RX_TIMEOUT[] = {0x9f, 0x0d};
static char GET_TX_BITMASK[] = {0x9f, 0x13};
static char GET_RX_SENSOR[] = {0x9f, 0x15};
/* sub in desired values in lower byte or bytes for full command */
/* FIXME: make use of these for transmit.
static char SET_CARRIER_FREQ[] = {0x9f, 0x06, 0x00, 0x00};
static char SET_TX_BITMASK[] = {0x9f, 0x08, 0x00};
static char SET_RX_TIMEOUT[] = {0x9f, 0x0c, 0x00, 0x00};
static char SET_RX_SENSOR[] = {0x9f, 0x14, 0x00};
*/
static void mceusb_dev_printdata(struct mceusb_dev *ir, char *buf,
int len, bool out)
{
char codes[USB_BUFLEN * 3 + 1];
char inout[9];
int i;
u8 cmd, subcmd, data1, data2;
struct device *dev = ir->dev;
int idx = 0;
/* skip meaningless 0xb1 0x60 header bytes on orig receiver */
if (ir->flags.microsoft_gen1 && !out)
idx = 2;
if (len <= idx)
return;
for (i = 0; i < len && i < USB_BUFLEN; i++)
snprintf(codes + i * 3, 4, "%02x ", buf[i] & 0xFF);
dev_info(dev, "%sx data: %s (length=%d)\n",
(out ? "t" : "r"), codes, len);
if (out)
strcpy(inout, "Request\0");
else
strcpy(inout, "Got\0");
cmd = buf[idx] & 0xff;
subcmd = buf[idx + 1] & 0xff;
data1 = buf[idx + 2] & 0xff;
data2 = buf[idx + 3] & 0xff;
switch (cmd) {
case 0x00:
if (subcmd == 0xff && data1 == 0xaa)
dev_info(dev, "Device reset requested\n");
else
dev_info(dev, "Unknown command 0x%02x 0x%02x\n",
cmd, subcmd);
break;
case 0xff:
switch (subcmd) {
case 0x0b:
if (len == 2)
dev_info(dev, "Get hw/sw rev?\n");
else
dev_info(dev, "hw/sw rev 0x%02x 0x%02x "
"0x%02x 0x%02x\n", data1, data2,
buf[idx + 4], buf[idx + 5]);
break;
case 0xaa:
dev_info(dev, "Device reset requested\n");
break;
case 0xfe:
dev_info(dev, "Previous command not supported\n");
break;
case 0x18:
case 0x1b:
default:
dev_info(dev, "Unknown command 0x%02x 0x%02x\n",
cmd, subcmd);
break;
}
break;
case 0x9f:
switch (subcmd) {
case 0x03:
dev_info(dev, "Ping\n");
break;
case 0x04:
dev_info(dev, "Resp to 9f 05 of 0x%02x 0x%02x\n",
data1, data2);
break;
case 0x06:
dev_info(dev, "%s carrier mode and freq of "
"0x%02x 0x%02x\n", inout, data1, data2);
break;
case 0x07:
dev_info(dev, "Get carrier mode and freq\n");
break;
case 0x08:
dev_info(dev, "%s transmit blaster mask of 0x%02x\n",
inout, data1);
break;
case 0x0c:
/* value is in units of 50us, so x*50/100 or x/2 ms */
dev_info(dev, "%s receive timeout of %d ms\n",
inout, ((data1 << 8) | data2) / 2);
break;
case 0x0d:
dev_info(dev, "Get receive timeout\n");
break;
case 0x13:
dev_info(dev, "Get transmit blaster mask\n");
break;
case 0x14:
dev_info(dev, "%s %s-range receive sensor in use\n",
inout, data1 == 0x02 ? "short" : "long");
break;
case 0x15:
if (len == 2)
dev_info(dev, "Get receive sensor\n");
else
dev_info(dev, "Received pulse count is %d\n",
((data1 << 8) | data2));
break;
case 0xfe:
dev_info(dev, "Error! Hardware is likely wedged...\n");
break;
case 0x05:
case 0x09:
case 0x0f:
default:
dev_info(dev, "Unknown command 0x%02x 0x%02x\n",
cmd, subcmd);
break;
}
break;
default:
break;
}
}
static void mce_async_callback(struct urb *urb, struct pt_regs *regs)
{
struct mceusb_dev *ir;
int len;
if (!urb)
return;
ir = urb->context;
if (ir) {
len = urb->actual_length;
dev_dbg(ir->dev, "callback called (status=%d len=%d)\n",
urb->status, len);
if (debug)
mceusb_dev_printdata(ir, urb->transfer_buffer,
len, true);
}
}
/* request incoming or send outgoing usb packet - used to initialize remote */
static void mce_request_packet(struct mceusb_dev *ir,
struct usb_endpoint_descriptor *ep,
unsigned char *data, int size, int urb_type)
{
int res;
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 */
usb_fill_int_urb(async_urb, ir->usbdev,
usb_sndintpipe(ir->usbdev, ep->bEndpointAddress),
async_buf, size, (usb_complete_t)mce_async_callback,
ir, ep->bInterval);
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)\n", size);
async_urb->transfer_buffer_length = size;
async_urb->dev = ir->usbdev;
res = usb_submit_urb(async_urb, GFP_ATOMIC);
if (res) {
dev_dbg(dev, "receive request FAILED! (res=%d)\n", res);
return;
}
dev_dbg(dev, "receive request complete (res=%d)\n", res);
}
static void mce_async_out(struct mceusb_dev *ir, unsigned char *data, int size)
{
mce_request_packet(ir, ir->usb_ep_out, data, size, MCEUSB_TX);
}
static void mce_sync_in(struct mceusb_dev *ir, unsigned char *data, int size)
{
mce_request_packet(ir, ir->usb_ep_in, data, size, MCEUSB_RX);
}
/* Send data out the IR blaster port(s) */
static int mceusb_tx_ir(void *priv, int *txbuf, u32 n)
{
struct mceusb_dev *ir = priv;
int i, ret = 0;
int count, cmdcount = 0;
unsigned char *cmdbuf; /* MCE command buffer */
long signal_duration = 0; /* Singnal length in us */
struct timeval start_time, end_time;
do_gettimeofday(&start_time);
count = n / sizeof(int);
cmdbuf = kzalloc(sizeof(int) * MCE_CMDBUF_SIZE, GFP_KERNEL);
if (!cmdbuf)
return -ENOMEM;
/* MCE tx init header */
cmdbuf[cmdcount++] = MCE_CONTROL_HEADER;
cmdbuf[cmdcount++] = 0x08;
cmdbuf[cmdcount++] = ir->tx_mask;
/* Generate mce packet data */
for (i = 0; (i < count) && (cmdcount < MCE_CMDBUF_SIZE); i++) {
signal_duration += txbuf[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_TX_HEADER_LENGTH) %
MCE_CODE_LENGTH == 0)
cmdbuf[cmdcount++] = MCE_PACKET_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));
}
/* Fix packet length in last header */
cmdbuf[cmdcount - (cmdcount - MCE_TX_HEADER_LENGTH) % MCE_CODE_LENGTH] =
0x80 + (cmdcount - MCE_TX_HEADER_LENGTH) % MCE_CODE_LENGTH - 1;
/* Check if we have room for the empty packet at the end */
if (cmdcount >= MCE_CMDBUF_SIZE) {
ret = -EINVAL;
goto out;
}
/* All mce commands end with an empty packet (0x80) */
cmdbuf[cmdcount++] = 0x80;
/* Transmit the command to the mce device */
mce_async_out(ir, cmdbuf, cmdcount);
/*
* The lircd gap calculation expects the write function to
* wait the time it takes for the ircommand to be sent before
* it returns.
*/
do_gettimeofday(&end_time);
signal_duration -= (end_time.tv_usec - start_time.tv_usec) +
(end_time.tv_sec - start_time.tv_sec) * 1000000;
/* delay with the closest number of ticks */
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(usecs_to_jiffies(signal_duration));
out:
kfree(cmdbuf);
return ret ? ret : n;
}
/* Sets active IR outputs -- mce devices typically (all?) have two */
static int mceusb_set_tx_mask(void *priv, u32 mask)
{
struct mceusb_dev *ir = priv;
if (ir->flags.tx_mask_inverted)
ir->tx_mask = (mask != 0x03 ? mask ^ 0x03 : mask) << 1;
else
ir->tx_mask = mask;
return 0;
}
/* Sets the send carrier frequency and mode */
static int mceusb_set_tx_carrier(void *priv, u32 carrier)
{
struct mceusb_dev *ir = priv;
int clk = 10000000;
int prescaler = 0, divisor = 0;
unsigned char cmdbuf[4] = { 0x9f, 0x06, 0x00, 0x00 };
/* Carrier has changed */
if (ir->carrier != carrier) {
if (carrier == 0) {
ir->carrier = carrier;
cmdbuf[2] = 0x01;
cmdbuf[3] = 0x80;
dev_dbg(ir->dev, "%s: disabling carrier "
"modulation\n", __func__);
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, "%s: requesting %u HZ "
"carrier\n", __func__, carrier);
/* Transmit new carrier to mce device */
mce_async_out(ir, cmdbuf, sizeof(cmdbuf));
return carrier;
}
}
return -EINVAL;
}
return carrier;
}
static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len)
{
struct ir_raw_event rawir = { .pulse = false, .duration = 0 };
int i, start_index = 0;
u8 hdr = MCE_CONTROL_HEADER;
/* skip meaningless 0xb1 0x60 header bytes on orig receiver */
if (ir->flags.microsoft_gen1)
start_index = 2;
for (i = start_index; i < buf_len;) {
if (ir->rem == 0) {
/* decode mce packets of the form (84),AA,BB,CC,DD */
/* IR data packets can span USB messages - rem */
hdr = ir->buf_in[i];
ir->rem = (hdr & MCE_PACKET_LENGTH_MASK);
ir->cmd = (hdr & ~MCE_PACKET_LENGTH_MASK);
dev_dbg(ir->dev, "New data. rem: 0x%02x, cmd: 0x%02x\n",
ir->rem, ir->cmd);
i++;
}
/* don't process MCE commands */
if (hdr == MCE_CONTROL_HEADER || hdr == 0xff) {
ir->rem = 0;
return;
}
for (; (ir->rem > 0) && (i < buf_len); i++) {
ir->rem--;
rawir.pulse = ((ir->buf_in[i] & MCE_PULSE_BIT) != 0);
rawir.duration = (ir->buf_in[i] & MCE_PULSE_MASK)
* MCE_TIME_UNIT * 1000;
if ((ir->buf_in[i] & MCE_PULSE_MASK) == 0x7f) {
if (ir->rawir.pulse == rawir.pulse)
ir->rawir.duration += rawir.duration;
else {
ir->rawir.duration = rawir.duration;
ir->rawir.pulse = rawir.pulse;
}
continue;
}
rawir.duration += ir->rawir.duration;
ir->rawir.duration = 0;
ir->rawir.pulse = rawir.pulse;
dev_dbg(ir->dev, "Storing %s with duration %d\n",
rawir.pulse ? "pulse" : "space",
rawir.duration);
ir_raw_event_store(ir->idev, &rawir);
}
if (ir->buf_in[i] == 0x80 || ir->buf_in[i] == 0x9f)
ir->rem = 0;
dev_dbg(ir->dev, "calling ir_raw_event_handle\n");
ir_raw_event_handle(ir->idev);
}
}
static void mceusb_dev_recv(struct urb *urb, struct pt_regs *regs)
{
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 (debug)
mceusb_dev_printdata(ir, urb->transfer_buffer, buf_len, false);
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 -ESHUTDOWN:
usb_unlink_urb(urb);
return;
case -EPIPE:
default:
break;
}
usb_submit_urb(urb, GFP_ATOMIC);
}
static void mceusb_gen1_init(struct mceusb_dev *ir)
{
int ret;
int maxp = ir->len_in;
struct device *dev = ir->dev;
char *data;
data = kzalloc(USB_CTRL_MSG_SZ, GFP_KERNEL);
if (!data) {
dev_err(dev, "%s: memory allocation failed!\n", __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, "%s - ret = %d\n", __func__, ret);
dev_dbg(dev, "%s - data[0] = %d, data[1] = %d\n",
__func__, 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, "%s - ret = %d\n", __func__, 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, "%s - retB = %d\n", __func__, 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, "%s - retC = %d\n", __func__, ret);
/* device reset */
mce_async_out(ir, DEVICE_RESET, sizeof(DEVICE_RESET));
mce_sync_in(ir, NULL, maxp);
/* get hw/sw revision? */
mce_async_out(ir, GET_REVISION, sizeof(GET_REVISION));
mce_sync_in(ir, NULL, maxp);
kfree(data);
};
static void mceusb_gen2_init(struct mceusb_dev *ir)
{
int maxp = ir->len_in;
/* device reset */
mce_async_out(ir, DEVICE_RESET, sizeof(DEVICE_RESET));
mce_sync_in(ir, NULL, maxp);
/* get hw/sw revision? */
mce_async_out(ir, GET_REVISION, sizeof(GET_REVISION));
mce_sync_in(ir, NULL, maxp);
/* unknown what the next two actually return... */
mce_async_out(ir, GET_UNKNOWN, sizeof(GET_UNKNOWN));
mce_sync_in(ir, NULL, maxp);
mce_async_out(ir, GET_UNKNOWN2, sizeof(GET_UNKNOWN2));
mce_sync_in(ir, NULL, maxp);
}
static void mceusb_get_parameters(struct mceusb_dev *ir)
{
int maxp = ir->len_in;
/* get the carrier and frequency */
mce_async_out(ir, GET_CARRIER_FREQ, sizeof(GET_CARRIER_FREQ));
mce_sync_in(ir, NULL, maxp);
/* get the transmitter bitmask */
mce_async_out(ir, GET_TX_BITMASK, sizeof(GET_TX_BITMASK));
mce_sync_in(ir, NULL, maxp);
/* get receiver timeout value */
mce_async_out(ir, GET_RX_TIMEOUT, sizeof(GET_RX_TIMEOUT));
mce_sync_in(ir, NULL, maxp);
/* get receiver sensor setting */
mce_async_out(ir, GET_RX_SENSOR, sizeof(GET_RX_SENSOR));
mce_sync_in(ir, NULL, maxp);
}
static struct input_dev *mceusb_init_input_dev(struct mceusb_dev *ir)
{
struct input_dev *idev;
struct ir_dev_props *props;
struct device *dev = ir->dev;
int ret = -ENODEV;
idev = input_allocate_device();
if (!idev) {
dev_err(dev, "remote input dev allocation failed\n");
goto idev_alloc_failed;
}
ret = -ENOMEM;
props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL);
if (!props) {
dev_err(dev, "remote ir dev props allocation failed\n");
goto props_alloc_failed;
}
snprintf(ir->name, sizeof(ir->name), "Media Center Ed. eHome "
"Infrared Remote Transceiver (%04x:%04x)",
le16_to_cpu(ir->usbdev->descriptor.idVendor),
le16_to_cpu(ir->usbdev->descriptor.idProduct));
idev->name = ir->name;
usb_make_path(ir->usbdev, ir->phys, sizeof(ir->phys));
strlcat(ir->phys, "/input0", sizeof(ir->phys));
idev->phys = ir->phys;
props->priv = ir;
props->driver_type = RC_DRIVER_IR_RAW;
props->allowed_protos = IR_TYPE_ALL;
props->s_tx_mask = mceusb_set_tx_mask;
props->s_tx_carrier = mceusb_set_tx_carrier;
props->tx_ir = mceusb_tx_ir;
ir->props = props;
ret = ir_input_register(idev, RC_MAP_RC6_MCE, props, DRIVER_NAME);
if (ret < 0) {
dev_err(dev, "remote input device register failed\n");
goto irdev_failed;
}
return idev;
irdev_failed:
kfree(props);
props_alloc_failed:
input_free_device(idev);
idev_alloc_failed:
return NULL;
}
static int __devinit 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] = "";
bool is_gen3;
bool is_microsoft_gen1;
bool tx_mask_inverted;
dev_dbg(&intf->dev, ": %s called\n", __func__);
idesc = intf->cur_altsetting;
is_gen3 = usb_match_id(intf, gen3_list) ? 1 : 0;
is_microsoft_gen1 = usb_match_id(intf, microsoft_gen1_list) ? 1 : 0;
tx_mask_inverted = usb_match_id(intf, std_tx_mask_list) ? 0 : 1;
/* 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)
&& ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_IN)
&& (((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK)
|| ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_INT))) {
ep_in = ep;
ep_in->bmAttributes = USB_ENDPOINT_XFER_INT;
ep_in->bInterval = 1;
dev_dbg(&intf->dev, ": acceptable inbound endpoint "
"found\n");
}
if ((ep_out == NULL)
&& ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_OUT)
&& (((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK)
|| ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_INT))) {
ep_out = ep;
ep_out->bmAttributes = USB_ENDPOINT_XFER_INT;
ep_out->bInterval = 1;
dev_dbg(&intf->dev, ": acceptable outbound endpoint "
"found\n");
}
}
if (ep_in == NULL) {
dev_dbg(&intf->dev, ": inbound and/or endpoint not found\n");
return -ENODEV;
}
pipe = usb_rcvintpipe(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 = dev;
ir->dev = &intf->dev;
ir->len_in = maxp;
ir->flags.microsoft_gen1 = is_microsoft_gen1;
ir->flags.tx_mask_inverted = tx_mask_inverted;
/* Saving usb interface data for use by the transmitter routine */
ir->usb_ep_in = ep_in;
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->idev = mceusb_init_input_dev(ir);
if (!ir->idev)
goto input_dev_fail;
/* flush buffers on the device */
mce_sync_in(ir, NULL, maxp);
mce_sync_in(ir, NULL, maxp);
/* wire up inbound data handler */
usb_fill_int_urb(ir->urb_in, dev, pipe, ir->buf_in,
maxp, (usb_complete_t) 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;
/* initialize device */
if (ir->flags.microsoft_gen1)
mceusb_gen1_init(ir);
else if (!is_gen3)
mceusb_gen2_init(ir);
mceusb_get_parameters(ir);
mceusb_set_tx_mask(ir, MCE_DEFAULT_TX_MASK);
usb_set_intfdata(intf, ir);
dev_info(&intf->dev, "Registered %s on usb%d:%d\n", name,
dev->bus->busnum, dev->devnum);
return 0;
/* Error-handling path */
input_dev_fail:
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!\n", __func__);
return -ENOMEM;
}
static void __devexit 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;
ir_input_unregister(ir->idev);
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);
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\n");
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\n");
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
};
static int __init mceusb_dev_init(void)
{
int ret;
ret = usb_register(&mceusb_dev_driver);
if (ret < 0)
printk(KERN_ERR DRIVER_NAME
": usb register failed, result = %d\n", ret);
return ret;
}
static void __exit mceusb_dev_exit(void)
{
usb_deregister(&mceusb_dev_driver);
}
module_init(mceusb_dev_init);
module_exit(mceusb_dev_exit);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(usb, mceusb_dev_table);
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
