/* * lirc_igorplugusb - USB remote support for LIRC * * Supports the standard homebrew IgorPlugUSB receiver with Igor's firmware. * See http://www.cesko.host.sk/IgorPlugUSB/IgorPlug-USB%20(AVR)_eng.htm * * The device can only record bursts of up to 36 pulses/spaces. * Works fine with RC5. Longer commands lead to device buffer overrun. * (Maybe a better firmware or a microcontroller with more ram can help?) * * Version 0.1 [beta status] * * Copyright (C) 2004 Jan M. Hochstein * * * This driver was derived from: * Paul Miller * "lirc_atiusb" module * Vladimir Dergachev 's 2002 * "USB ATI Remote support" (input device) * Adrian Dewhurst 's 2002 * "USB StreamZap remote driver" (LIRC) * Artur Lipowski 's 2002 * "lirc_dev" and "lirc_gpio" LIRC modules */ /* * 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 #include #include #include #include #include #include #include #include #include /* module identification */ #define DRIVER_VERSION "0.1" #define DRIVER_AUTHOR \ "Jan M. Hochstein " #define DRIVER_DESC "USB remote driver for LIRC" #define DRIVER_NAME "lirc_igorplugusb" /* debugging support */ #ifdef CONFIG_USB_DEBUG static int debug = 1; #else static int debug; #endif #define dprintk(fmt, args...) \ do { \ if (debug) \ printk(KERN_DEBUG fmt, ## args); \ } while (0) /* One mode2 pulse/space has 4 bytes. */ #define CODE_LENGTH sizeof(int) /* Igor's firmware cannot record bursts longer than 36. */ #define DEVICE_BUFLEN 36 /* * Header at the beginning of the device's buffer: * unsigned char data_length * unsigned char data_start (!=0 means ring-buffer overrun) * unsigned char counter (incremented by each burst) */ #define DEVICE_HEADERLEN 3 /* This is for the gap */ #define ADDITIONAL_LIRC_BYTES 2 /* times to poll per second */ #define SAMPLE_RATE 100 static int sample_rate = SAMPLE_RATE; /**** Igor's USB Request Codes */ #define SET_INFRABUFFER_EMPTY 1 /** * Params: none * Answer: empty */ #define GET_INFRACODE 2 /** * Params: * wValue: offset to begin reading infra buffer * * Answer: infra data */ #define SET_DATAPORT_DIRECTION 3 /** * Params: * wValue: (byte) 1 bit for each data port pin (0=in, 1=out) * * Answer: empty */ #define GET_DATAPORT_DIRECTION 4 /** * Params: none * * Answer: (byte) 1 bit for each data port pin (0=in, 1=out) */ #define SET_OUT_DATAPORT 5 /** * Params: * wValue: byte to write to output data port * * Answer: empty */ #define GET_OUT_DATAPORT 6 /** * Params: none * * Answer: least significant 3 bits read from output data port */ #define GET_IN_DATAPORT 7 /** * Params: none * * Answer: least significant 3 bits read from input data port */ #define READ_EEPROM 8 /** * Params: * wValue: offset to begin reading EEPROM * * Answer: EEPROM bytes */ #define WRITE_EEPROM 9 /** * Params: * wValue: offset to EEPROM byte * wIndex: byte to write * * Answer: empty */ #define SEND_RS232 10 /** * Params: * wValue: byte to send * * Answer: empty */ #define RECV_RS232 11 /** * Params: none * * Answer: byte received */ #define SET_RS232_BAUD 12 /** * Params: * wValue: byte to write to UART bit rate register (UBRR) * * Answer: empty */ #define GET_RS232_BAUD 13 /** * Params: none * * Answer: byte read from UART bit rate register (UBRR) */ /* data structure for each usb remote */ struct igorplug { /* usb */ struct usb_device *usbdev; struct urb *urb_in; int devnum; unsigned char *buf_in; unsigned int len_in; int in_space; struct timeval last_time; dma_addr_t dma_in; /* lirc */ struct lirc_driver *d; /* handle sending (init strings) */ int send_flags; wait_queue_head_t wait_out; }; static int unregister_from_lirc(struct igorplug *ir) { struct lirc_driver *d = ir->d; int devnum; if (!ir->d) return -EINVAL; devnum = ir->devnum; dprintk(DRIVER_NAME "[%d]: unregister from lirc called\n", devnum); lirc_unregister_driver(d->minor); printk(DRIVER_NAME "[%d]: usb remote disconnected\n", devnum); kfree(d); ir->d = NULL; kfree(ir); return 0; } static int set_use_inc(void *data) { struct igorplug *ir = data; if (!ir) { printk(DRIVER_NAME "[?]: set_use_inc called with no context\n"); return -EIO; } dprintk(DRIVER_NAME "[%d]: set use inc\n", ir->devnum); if (!ir->usbdev) return -ENODEV; return 0; } static void set_use_dec(void *data) { struct igorplug *ir = data; if (!ir) { printk(DRIVER_NAME "[?]: set_use_dec called with no context\n"); return; } dprintk(DRIVER_NAME "[%d]: set use dec\n", ir->devnum); } /** * Called in user context. * return 0 if data was added to the buffer and * -ENODATA if none was available. This should add some number of bits * evenly divisible by code_length to the buffer */ static int usb_remote_poll(void *data, struct lirc_buffer *buf) { int ret; struct igorplug *ir = (struct igorplug *)data; if (!ir->usbdev) /* Has the device been removed? */ return -ENODEV; memset(ir->buf_in, 0, ir->len_in); ret = usb_control_msg( ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0), GET_INFRACODE, USB_TYPE_VENDOR|USB_DIR_IN, 0/* offset */, /*unused*/0, ir->buf_in, ir->len_in, /*timeout*/HZ * USB_CTRL_GET_TIMEOUT); if (ret > 0) { int i = DEVICE_HEADERLEN; int code, timediff; struct timeval now; if (ret <= 1) /* ACK packet has 1 byte --> ignore */ return -ENODATA; dprintk(DRIVER_NAME ": Got %d bytes. Header: %02x %02x %02x\n", ret, ir->buf_in[0], ir->buf_in[1], ir->buf_in[2]); if (ir->buf_in[2] != 0) { printk(DRIVER_NAME "[%d]: Device buffer overrun.\n", ir->devnum); /* start at earliest byte */ i = DEVICE_HEADERLEN + ir->buf_in[2]; /* where are we now? space, gap or pulse? */ } do_gettimeofday(&now); timediff = now.tv_sec - ir->last_time.tv_sec; if (timediff + 1 > PULSE_MASK / 1000000) timediff = PULSE_MASK; else { timediff *= 1000000; timediff += now.tv_usec - ir->last_time.tv_usec; } ir->last_time.tv_sec = now.tv_sec; ir->last_time.tv_usec = now.tv_usec; /* create leading gap */ code = timediff; lirc_buffer_write(buf, (unsigned char *)&code); ir->in_space = 1; /* next comes a pulse */ /* MODE2: pulse/space (PULSE_BIT) in 1us units */ while (i < ret) { /* 1 Igor-tick = 85.333333 us */ code = (unsigned int)ir->buf_in[i] * 85 + (unsigned int)ir->buf_in[i] / 3; if (ir->in_space) code |= PULSE_BIT; lirc_buffer_write(buf, (unsigned char *)&code); /* 1 chunk = CODE_LENGTH bytes */ ir->in_space ^= 1; ++i; } ret = usb_control_msg( ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0), SET_INFRABUFFER_EMPTY, USB_TYPE_VENDOR|USB_DIR_IN, /*unused*/0, /*unused*/0, /*dummy*/ir->buf_in, /*dummy*/ir->len_in, /*timeout*/HZ * USB_CTRL_GET_TIMEOUT); if (ret < 0) printk(DRIVER_NAME "[%d]: SET_INFRABUFFER_EMPTY: " "error %d\n", ir->devnum, ret); return 0; } else if (ret < 0) printk(DRIVER_NAME "[%d]: GET_INFRACODE: error %d\n", ir->devnum, ret); return -ENODATA; } static int usb_remote_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *dev = NULL; struct usb_host_interface *idesc = NULL; struct usb_host_endpoint *ep_ctl2; struct igorplug *ir = NULL; struct lirc_driver *driver = NULL; int devnum, pipe, maxp; int minor = 0; char buf[63], name[128] = ""; int mem_failure = 0; int ret; dprintk(DRIVER_NAME ": usb probe called.\n"); dev = interface_to_usbdev(intf); idesc = intf->cur_altsetting; if (idesc->desc.bNumEndpoints != 1) return -ENODEV; ep_ctl2 = idesc->endpoint; if (((ep_ctl2->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_IN) || (ep_ctl2->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_CONTROL) return -ENODEV; pipe = usb_rcvctrlpipe(dev, ep_ctl2->desc.bEndpointAddress); devnum = dev->devnum; maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); dprintk(DRIVER_NAME "[%d]: bytes_in_key=%lu maxp=%d\n", devnum, CODE_LENGTH, maxp); mem_failure = 0; ir = kzalloc(sizeof(struct igorplug), GFP_KERNEL); if (!ir) { mem_failure = 1; goto mem_failure_switch; } driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL); if (!driver) { mem_failure = 2; goto mem_failure_switch; } ir->buf_in = usb_alloc_coherent(dev, DEVICE_BUFLEN+DEVICE_HEADERLEN, GFP_ATOMIC, &ir->dma_in); if (!ir->buf_in) { mem_failure = 3; goto mem_failure_switch; } strcpy(driver->name, DRIVER_NAME " "); driver->minor = -1; driver->code_length = CODE_LENGTH * 8; /* in bits */ driver->features = LIRC_CAN_REC_MODE2; driver->data = ir; driver->chunk_size = CODE_LENGTH; driver->buffer_size = DEVICE_BUFLEN + ADDITIONAL_LIRC_BYTES; driver->set_use_inc = &set_use_inc; driver->set_use_dec = &set_use_dec; driver->sample_rate = sample_rate; /* per second */ driver->add_to_buf = &usb_remote_poll; driver->dev = &intf->dev; driver->owner = THIS_MODULE; init_waitqueue_head(&ir->wait_out); minor = lirc_register_driver(driver); if (minor < 0) mem_failure = 9; mem_failure_switch: switch (mem_failure) { case 9: usb_free_coherent(dev, DEVICE_BUFLEN+DEVICE_HEADERLEN, ir->buf_in, ir->dma_in); case 3: kfree(driver); case 2: kfree(ir); case 1: printk(DRIVER_NAME "[%d]: out of memory (code=%d)\n", devnum, mem_failure); return -ENOMEM; } driver->minor = minor; ir->d = driver; ir->devnum = devnum; ir->usbdev = dev; ir->len_in = DEVICE_BUFLEN+DEVICE_HEADERLEN; ir->in_space = 1; /* First mode2 event is a space. */ do_gettimeofday(&ir->last_time); 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); printk(DRIVER_NAME "[%d]: %s on usb%d:%d\n", devnum, name, dev->bus->busnum, devnum); /* clear device buffer */ ret = usb_control_msg(ir->usbdev, usb_rcvctrlpipe(ir->usbdev, 0), SET_INFRABUFFER_EMPTY, USB_TYPE_VENDOR|USB_DIR_IN, /*unused*/0, /*unused*/0, /*dummy*/ir->buf_in, /*dummy*/ir->len_in, /*timeout*/HZ * USB_CTRL_GET_TIMEOUT); if (ret < 0) printk(DRIVER_NAME "[%d]: SET_INFRABUFFER_EMPTY: error %d\n", devnum, ret); usb_set_intfdata(intf, ir); return 0; } static void usb_remote_disconnect(struct usb_interface *intf) { struct usb_device *dev = interface_to_usbdev(intf); struct igorplug *ir = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); if (!ir || !ir->d) return; ir->usbdev = NULL; wake_up_all(&ir->wait_out); usb_free_coherent(dev, ir->len_in, ir->buf_in, ir->dma_in); unregister_from_lirc(ir); } static struct usb_device_id usb_remote_id_table[] = { /* Igor Plug USB (Atmel's Manufact. ID) */ { USB_DEVICE(0x03eb, 0x0002) }, /* Terminating entry */ { } }; static struct usb_driver usb_remote_driver = { .name = DRIVER_NAME, .probe = usb_remote_probe, .disconnect = usb_remote_disconnect, .id_table = usb_remote_id_table }; static int __init usb_remote_init(void) { int i; printk(KERN_INFO "\n" DRIVER_NAME ": " DRIVER_DESC " v" DRIVER_VERSION "\n"); printk(DRIVER_NAME ": " DRIVER_AUTHOR "\n"); dprintk(DRIVER_NAME ": debug mode enabled\n"); i = usb_register(&usb_remote_driver); if (i < 0) { printk(DRIVER_NAME ": usb register failed, result = %d\n", i); return -ENODEV; } return 0; } static void __exit usb_remote_exit(void) { usb_deregister(&usb_remote_driver); } module_init(usb_remote_init); module_exit(usb_remote_exit); #include MODULE_INFO(vermagic, VERMAGIC_STRING); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(usb, usb_remote_id_table); module_param(sample_rate, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(sample_rate, "Sampling rate in Hz (default: 100)");