2 * lirc_igorplugusb - USB remote support for LIRC
4 * Supports the standard homebrew IgorPlugUSB receiver with Igor's firmware.
5 * See http://www.cesko.host.sk/IgorPlugUSB/IgorPlug-USB%20(AVR)_eng.htm
7 * The device can only record bursts of up to 36 pulses/spaces.
8 * Works fine with RC5. Longer commands lead to device buffer overrun.
9 * (Maybe a better firmware or a microcontroller with more ram can help?)
11 * Version 0.1 [beta status]
13 * Copyright (C) 2004 Jan M. Hochstein
14 * <hochstein@algo.informatik.tu-darmstadt.de>
16 * This driver was derived from:
17 * Paul Miller <pmiller9@users.sourceforge.net>
18 * "lirc_atiusb" module
19 * Vladimir Dergachev <volodya@minspring.com>'s 2002
20 * "USB ATI Remote support" (input device)
21 * Adrian Dewhurst <sailor-lk@sailorfrag.net>'s 2002
22 * "USB StreamZap remote driver" (LIRC)
23 * Artur Lipowski <alipowski@kki.net.pl>'s 2002
24 * "lirc_dev" and "lirc_gpio" LIRC modules
28 * This program is free software; you can redistribute it and/or modify
29 * it under the terms of the GNU General Public License as published by
30 * the Free Software Foundation; either version 2 of the License, or
31 * (at your option) any later version.
33 * This program is distributed in the hope that it will be useful,
34 * but WITHOUT ANY WARRANTY; without even the implied warranty of
35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
36 * GNU General Public License for more details.
38 * You should have received a copy of the GNU General Public License
39 * along with this program; if not, write to the Free Software
40 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
43 #include <linux/module.h>
44 #include <linux/kernel.h>
45 #include <linux/kmod.h>
46 #include <linux/sched.h>
47 #include <linux/errno.h>
49 #include <linux/usb.h>
50 #include <linux/time.h>
52 #include <media/lirc.h>
53 #include <media/lirc_dev.h>
56 /* module identification */
57 #define DRIVER_VERSION "0.2"
58 #define DRIVER_AUTHOR \
59 "Jan M. Hochstein <hochstein@algo.informatik.tu-darmstadt.de>"
60 #define DRIVER_DESC "Igorplug USB remote driver for LIRC"
61 #define DRIVER_NAME "lirc_igorplugusb"
63 /* debugging support */
64 #ifdef CONFIG_USB_DEBUG
65 static bool debug = 1;
70 #define dprintk(fmt, args...) \
73 printk(KERN_DEBUG fmt, ## args); \
76 /* One mode2 pulse/space has 4 bytes. */
77 #define CODE_LENGTH sizeof(int)
79 /* Igor's firmware cannot record bursts longer than 36. */
80 #define DEVICE_BUFLEN 36
83 * Header at the beginning of the device's buffer:
84 * unsigned char data_length
85 * unsigned char data_start (!=0 means ring-buffer overrun)
86 * unsigned char counter (incremented by each burst)
88 #define DEVICE_HEADERLEN 3
90 /* This is for the gap */
91 #define ADDITIONAL_LIRC_BYTES 2
93 /* times to poll per second */
94 #define SAMPLE_RATE 100
95 static int sample_rate = SAMPLE_RATE;
98 /**** Igor's USB Request Codes */
100 #define SET_INFRABUFFER_EMPTY 1
106 #define GET_INFRACODE 2
109 * wValue: offset to begin reading infra buffer
114 #define SET_DATAPORT_DIRECTION 3
117 * wValue: (byte) 1 bit for each data port pin (0=in, 1=out)
122 #define GET_DATAPORT_DIRECTION 4
126 * Answer: (byte) 1 bit for each data port pin (0=in, 1=out)
129 #define SET_OUT_DATAPORT 5
132 * wValue: byte to write to output data port
137 #define GET_OUT_DATAPORT 6
141 * Answer: least significant 3 bits read from output data port
144 #define GET_IN_DATAPORT 7
148 * Answer: least significant 3 bits read from input data port
151 #define READ_EEPROM 8
154 * wValue: offset to begin reading EEPROM
156 * Answer: EEPROM bytes
159 #define WRITE_EEPROM 9
162 * wValue: offset to EEPROM byte
163 * wIndex: byte to write
168 #define SEND_RS232 10
171 * wValue: byte to send
176 #define RECV_RS232 11
180 * Answer: byte received
183 #define SET_RS232_BAUD 12
186 * wValue: byte to write to UART bit rate register (UBRR)
191 #define GET_RS232_BAUD 13
195 * Answer: byte read from UART bit rate register (UBRR)
199 /* data structure for each usb remote */
203 struct usb_device *usbdev;
206 unsigned char *buf_in;
209 struct timeval last_time;
214 struct lirc_driver *d;
216 /* handle sending (init strings) */
220 static int unregister_from_lirc(struct igorplug *ir)
222 struct lirc_driver *d;
226 dev_err(&ir->usbdev->dev,
227 "%s: called with NULL device struct!\n", __func__);
235 dev_err(&ir->usbdev->dev,
236 "%s: called with NULL lirc driver struct!\n", __func__);
240 dprintk(DRIVER_NAME "[%d]: calling lirc_unregister_driver\n", devnum);
241 lirc_unregister_driver(d->minor);
246 static int set_use_inc(void *data)
248 struct igorplug *ir = data;
251 printk(DRIVER_NAME "[?]: set_use_inc called with no context\n");
255 dprintk(DRIVER_NAME "[%d]: set use inc\n", ir->devnum);
263 static void set_use_dec(void *data)
265 struct igorplug *ir = data;
268 printk(DRIVER_NAME "[?]: set_use_dec called with no context\n");
272 dprintk(DRIVER_NAME "[%d]: set use dec\n", ir->devnum);
275 static void send_fragment(struct igorplug *ir, struct lirc_buffer *buf,
280 /* MODE2: pulse/space (PULSE_BIT) in 1us units */
282 /* 1 Igor-tick = 85.333333 us */
283 code = (unsigned int)ir->buf_in[i] * 85 +
284 (unsigned int)ir->buf_in[i] / 3;
285 ir->last_time.tv_usec += code;
288 lirc_buffer_write(buf, (unsigned char *)&code);
289 /* 1 chunk = CODE_LENGTH bytes */
296 * Called in user context.
297 * return 0 if data was added to the buffer and
298 * -ENODATA if none was available. This should add some number of bits
299 * evenly divisible by code_length to the buffer
301 static int igorplugusb_remote_poll(void *data, struct lirc_buffer *buf)
304 struct igorplug *ir = (struct igorplug *)data;
306 if (!ir || !ir->usbdev) /* Has the device been removed? */
309 memset(ir->buf_in, 0, ir->len_in);
311 ret = usb_control_msg(ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0),
312 GET_INFRACODE, USB_TYPE_VENDOR | USB_DIR_IN,
313 0/* offset */, /*unused*/0,
314 ir->buf_in, ir->len_in,
315 /*timeout*/HZ * USB_CTRL_GET_TIMEOUT);
320 /* ACK packet has 1 byte --> ignore */
321 if (ret < DEVICE_HEADERLEN)
324 dprintk(DRIVER_NAME ": Got %d bytes. Header: %*ph\n",
327 do_gettimeofday(&now);
328 timediff = now.tv_sec - ir->last_time.tv_sec;
329 if (timediff + 1 > PULSE_MASK / 1000000)
330 timediff = PULSE_MASK;
333 timediff += now.tv_usec - ir->last_time.tv_usec;
335 ir->last_time.tv_sec = now.tv_sec;
336 ir->last_time.tv_usec = now.tv_usec;
338 /* create leading gap */
340 lirc_buffer_write(buf, (unsigned char *)&code);
341 ir->in_space = 1; /* next comes a pulse */
343 if (ir->buf_in[2] == 0)
344 send_fragment(ir, buf, DEVICE_HEADERLEN, ret);
346 dev_warn(&ir->usbdev->dev,
347 "[%d]: Device buffer overrun.\n", ir->devnum);
348 /* HHHNNNNNNNNNNNOOOOOOOO H = header
349 <---[2]---> N = newer
350 <---------ret--------> O = older */
351 ir->buf_in[2] %= ret - DEVICE_HEADERLEN; /* sanitize */
352 /* keep even-ness to not desync pulse/pause */
353 send_fragment(ir, buf, DEVICE_HEADERLEN +
354 ir->buf_in[2] - (ir->buf_in[2] & 1), ret);
355 send_fragment(ir, buf, DEVICE_HEADERLEN,
356 DEVICE_HEADERLEN + ir->buf_in[2]);
359 ret = usb_control_msg(
360 ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0),
361 SET_INFRABUFFER_EMPTY, USB_TYPE_VENDOR|USB_DIR_IN,
362 /*unused*/0, /*unused*/0,
363 /*dummy*/ir->buf_in, /*dummy*/ir->len_in,
364 /*timeout*/HZ * USB_CTRL_GET_TIMEOUT);
366 printk(DRIVER_NAME "[%d]: SET_INFRABUFFER_EMPTY: "
367 "error %d\n", ir->devnum, ret);
370 printk(DRIVER_NAME "[%d]: GET_INFRACODE: error %d\n",
376 static int igorplugusb_remote_probe(struct usb_interface *intf,
377 const struct usb_device_id *id)
379 struct usb_device *dev;
380 struct usb_host_interface *idesc = NULL;
381 struct usb_endpoint_descriptor *ep;
382 struct igorplug *ir = NULL;
383 struct lirc_driver *driver = NULL;
384 int devnum, pipe, maxp;
385 char buf[63], name[128] = "";
388 dprintk(DRIVER_NAME ": usb probe called.\n");
390 dev = interface_to_usbdev(intf);
392 idesc = intf->cur_altsetting;
394 if (idesc->desc.bNumEndpoints != 1)
397 ep = &idesc->endpoint->desc;
398 if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
400 || (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
401 != USB_ENDPOINT_XFER_CONTROL)
404 pipe = usb_rcvctrlpipe(dev, ep->bEndpointAddress);
405 devnum = dev->devnum;
406 maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
408 dprintk(DRIVER_NAME "[%d]: bytes_in_key=%zu maxp=%d\n",
409 devnum, CODE_LENGTH, maxp);
411 ir = devm_kzalloc(&intf->dev, sizeof(*ir), GFP_KERNEL);
415 driver = devm_kzalloc(&intf->dev, sizeof(*driver), GFP_KERNEL);
419 ir->buf_in = usb_alloc_coherent(dev, DEVICE_BUFLEN + DEVICE_HEADERLEN,
420 GFP_ATOMIC, &ir->dma_in);
424 strcpy(driver->name, DRIVER_NAME " ");
426 driver->code_length = CODE_LENGTH * 8; /* in bits */
427 driver->features = LIRC_CAN_REC_MODE2;
429 driver->chunk_size = CODE_LENGTH;
430 driver->buffer_size = DEVICE_BUFLEN + ADDITIONAL_LIRC_BYTES;
431 driver->set_use_inc = &set_use_inc;
432 driver->set_use_dec = &set_use_dec;
433 driver->sample_rate = sample_rate; /* per second */
434 driver->add_to_buf = &igorplugusb_remote_poll;
435 driver->dev = &intf->dev;
436 driver->owner = THIS_MODULE;
438 ret = lirc_register_driver(driver);
440 usb_free_coherent(dev, DEVICE_BUFLEN + DEVICE_HEADERLEN,
441 ir->buf_in, ir->dma_in);
449 ir->len_in = DEVICE_BUFLEN + DEVICE_HEADERLEN;
450 ir->in_space = 1; /* First mode2 event is a space. */
451 do_gettimeofday(&ir->last_time);
453 if (dev->descriptor.iManufacturer
454 && usb_string(dev, dev->descriptor.iManufacturer,
455 buf, sizeof(buf)) > 0)
456 strlcpy(name, buf, sizeof(name));
457 if (dev->descriptor.iProduct
458 && usb_string(dev, dev->descriptor.iProduct, buf, sizeof(buf)) > 0)
459 snprintf(name + strlen(name), sizeof(name) - strlen(name),
461 printk(DRIVER_NAME "[%d]: %s on usb%d:%d\n", devnum, name,
462 dev->bus->busnum, devnum);
464 /* clear device buffer */
465 ret = usb_control_msg(ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0),
466 SET_INFRABUFFER_EMPTY, USB_TYPE_VENDOR|USB_DIR_IN,
467 /*unused*/0, /*unused*/0,
468 /*dummy*/ir->buf_in, /*dummy*/ir->len_in,
469 /*timeout*/HZ * USB_CTRL_GET_TIMEOUT);
471 printk(DRIVER_NAME "[%d]: SET_INFRABUFFER_EMPTY: error %d\n",
474 usb_set_intfdata(intf, ir);
478 static void igorplugusb_remote_disconnect(struct usb_interface *intf)
480 struct usb_device *usbdev = interface_to_usbdev(intf);
481 struct igorplug *ir = usb_get_intfdata(intf);
482 struct device *dev = &intf->dev;
485 usb_set_intfdata(intf, NULL);
492 usb_free_coherent(usbdev, ir->len_in, ir->buf_in, ir->dma_in);
494 devnum = unregister_from_lirc(ir);
496 dev_info(dev, DRIVER_NAME "[%d]: %s done\n", devnum, __func__);
499 static struct usb_device_id igorplugusb_remote_id_table[] = {
500 /* Igor Plug USB (Atmel's Manufact. ID) */
501 { USB_DEVICE(0x03eb, 0x0002) },
502 /* Fit PC2 Infrared Adapter */
503 { USB_DEVICE(0x03eb, 0x21fe) },
505 /* Terminating entry */
509 static struct usb_driver igorplugusb_remote_driver = {
511 .probe = igorplugusb_remote_probe,
512 .disconnect = igorplugusb_remote_disconnect,
513 .id_table = igorplugusb_remote_id_table
516 module_usb_driver(igorplugusb_remote_driver);
518 #include <linux/vermagic.h>
519 MODULE_INFO(vermagic, VERMAGIC_STRING);
521 MODULE_DESCRIPTION(DRIVER_DESC);
522 MODULE_AUTHOR(DRIVER_AUTHOR);
523 MODULE_LICENSE("GPL");
524 MODULE_DEVICE_TABLE(usb, igorplugusb_remote_id_table);
526 module_param(sample_rate, int, S_IRUGO | S_IWUSR);
527 MODULE_PARM_DESC(sample_rate, "Sampling rate in Hz (default: 100)");
529 module_param(debug, bool, S_IRUGO | S_IWUSR);
530 MODULE_PARM_DESC(debug, "Debug enabled or not");