+++ /dev/null
-/*
- * lirc_ttusbir.c
- *
- * lirc_ttusbir - LIRC device driver for the TechnoTrend USB IR Receiver
- *
- * Copyright (C) 2007 Stefan Macher <st_maker-lirc@yahoo.de>
- *
- * This LIRC driver provides access to the TechnoTrend USB IR Receiver.
- * The receiver delivers the IR signal as raw sampled true/false data in
- * isochronous USB packets each of size 128 byte.
- * Currently the driver reduces the sampling rate by factor of 8 as this
- * is still more than enough to decode RC-5 - others should be analyzed.
- * But the driver does not rely on RC-5 it should be able to decode every
- * IR signal that is not too fast.
- */
-
-/*
- * 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/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-
-#include <media/lirc.h>
-#include <media/lirc_dev.h>
-
-MODULE_DESCRIPTION("TechnoTrend USB IR device driver for LIRC");
-MODULE_AUTHOR("Stefan Macher (st_maker-lirc@yahoo.de)");
-MODULE_LICENSE("GPL");
-
-/* #define DEBUG */
-#ifdef DEBUG
-#define DPRINTK printk
-#else
-#define DPRINTK(_x_, a...)
-#endif
-
-/* function declarations */
-static int probe(struct usb_interface *intf, const struct usb_device_id *id);
-static void disconnect(struct usb_interface *intf);
-static void urb_complete(struct urb *urb);
-static int set_use_inc(void *data);
-static void set_use_dec(void *data);
-
-static int num_urbs = 2;
-module_param(num_urbs, int, S_IRUGO);
-MODULE_PARM_DESC(num_urbs,
- "Number of URBs in queue. Try to increase to 4 in case "
- "of problems (default: 2; minimum: 2)");
-
-/* table of devices that work with this driver */
-static struct usb_device_id device_id_table[] = {
- /* TechnoTrend USB IR Receiver */
- { USB_DEVICE(0x0B48, 0x2003) },
- /* Terminating entry */
- { }
-};
-MODULE_DEVICE_TABLE(usb, device_id_table);
-
-/* USB driver definition */
-static struct usb_driver usb_driver = {
- .name = "TTUSBIR",
- .id_table = &(device_id_table[0]),
- .probe = probe,
- .disconnect = disconnect,
-};
-
-/* USB device definition */
-struct ttusbir_device {
- struct usb_driver *usb_driver;
- struct usb_device *udev;
- struct usb_interface *interf;
- struct usb_class_driver class_driver;
- unsigned int ifnum; /* Interface number to use */
- unsigned int alt_setting; /* alternate setting to use */
- unsigned int endpoint; /* Endpoint to use */
- struct urb **urb; /* num_urb URB pointers*/
- char **buffer; /* 128 byte buffer for each URB */
- struct lirc_buffer rbuf; /* Buffer towards LIRC */
- struct lirc_driver driver;
- int minor;
- int last_pulse; /* remembers if last received byte was pulse or space */
- int last_num; /* remembers how many last bytes appeared */
- int opened;
-};
-
-/*** LIRC specific functions ***/
-static int set_use_inc(void *data)
-{
- int i, retval;
- struct ttusbir_device *ttusbir = data;
-
- DPRINTK("Sending first URBs\n");
- /* @TODO Do I need to check if I am already opened */
- ttusbir->opened = 1;
-
- for (i = 0; i < num_urbs; i++) {
- retval = usb_submit_urb(ttusbir->urb[i], GFP_KERNEL);
- if (retval) {
- dev_err(&ttusbir->interf->dev,
- "%s: usb_submit_urb failed on urb %d\n",
- __func__, i);
- return retval;
- }
- }
- return 0;
-}
-
-static void set_use_dec(void *data)
-{
- struct ttusbir_device *ttusbir = data;
-
- DPRINTK("Device closed\n");
-
- ttusbir->opened = 0;
-}
-
-/*** USB specific functions ***/
-
-/*
- * This mapping table is used to do a very simple filtering of the
- * input signal.
- * For a value with at least 4 bits set it returns 0xFF otherwise
- * 0x00. For faster IR signals this can not be used. But for RC-5 we
- * still have about 14 samples per pulse/space, i.e. we sample with 14
- * times higher frequency than the signal frequency
- */
-const unsigned char map_table[] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0x00, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0xFF, 0xFF,
- 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
- 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
-};
-
-static void urb_complete(struct urb *urb)
-{
- struct ttusbir_device *ttusbir;
- unsigned char *buf;
- int i;
- int l;
-
- ttusbir = urb->context;
-
- if (!ttusbir->opened)
- return;
-
- buf = (unsigned char *)urb->transfer_buffer;
-
- for (i = 0; i < 128; i++) {
- /* Here we do the filtering and some kind of down sampling */
- buf[i] = ~map_table[buf[i]];
- if (ttusbir->last_pulse == buf[i]) {
- if (ttusbir->last_num < PULSE_MASK/63)
- ttusbir->last_num++;
- /*
- * else we are in a idle period and do not need to
- * increment any longer
- */
- } else {
- l = ttusbir->last_num * 62; /* about 62 = us/byte */
- if (ttusbir->last_pulse) /* pulse or space? */
- l |= PULSE_BIT;
- if (!lirc_buffer_full(&ttusbir->rbuf)) {
- lirc_buffer_write(&ttusbir->rbuf, (void *)&l);
- wake_up_interruptible(&ttusbir->rbuf.wait_poll);
- }
- ttusbir->last_num = 0;
- ttusbir->last_pulse = buf[i];
- }
- }
- usb_submit_urb(urb, GFP_ATOMIC); /* keep data rolling :-) */
-}
-
-/*
- * Called whenever the USB subsystem thinks we could be the right driver
- * to handle this device
- */
-static int probe(struct usb_interface *intf, const struct usb_device_id *id)
-{
- int alt_set, endp;
- int found = 0;
- int i, j;
- int struct_size;
- struct usb_host_interface *host_interf;
- struct usb_interface_descriptor *interf_desc;
- struct usb_host_endpoint *host_endpoint;
- struct ttusbir_device *ttusbir;
-
- DPRINTK("Module ttusbir probe\n");
-
- /* To reduce memory fragmentation we use only one allocation */
- struct_size = sizeof(struct ttusbir_device) +
- (sizeof(struct urb *) * num_urbs) +
- (sizeof(char *) * num_urbs) +
- (num_urbs * 128);
- ttusbir = kzalloc(struct_size, GFP_KERNEL);
- if (!ttusbir)
- return -ENOMEM;
-
- ttusbir->urb = (struct urb **)((char *)ttusbir +
- sizeof(struct ttusbir_device));
- ttusbir->buffer = (char **)((char *)ttusbir->urb +
- (sizeof(struct urb *) * num_urbs));
- for (i = 0; i < num_urbs; i++)
- ttusbir->buffer[i] = (char *)ttusbir->buffer +
- (sizeof(char *)*num_urbs) + (i * 128);
-
- ttusbir->usb_driver = &usb_driver;
- ttusbir->alt_setting = -1;
- /* @TODO check if error can be returned */
- ttusbir->udev = usb_get_dev(interface_to_usbdev(intf));
- ttusbir->interf = intf;
- ttusbir->last_pulse = 0x00;
- ttusbir->last_num = 0;
-
- /*
- * Now look for interface setting we can handle
- * We are searching for the alt setting where end point
- * 0x82 has max packet size 16
- */
- for (alt_set = 0; alt_set < intf->num_altsetting && !found; alt_set++) {
- host_interf = &intf->altsetting[alt_set];
- interf_desc = &host_interf->desc;
- for (endp = 0; endp < interf_desc->bNumEndpoints; endp++) {
- host_endpoint = &host_interf->endpoint[endp];
- if ((host_endpoint->desc.bEndpointAddress == 0x82) &&
- (host_endpoint->desc.wMaxPacketSize == 0x10)) {
- ttusbir->alt_setting = alt_set;
- ttusbir->endpoint = endp;
- found = 1;
- break;
- }
- }
- }
- if (ttusbir->alt_setting != -1)
- DPRINTK("alt setting: %d\n", ttusbir->alt_setting);
- else {
- dev_err(&intf->dev, "Could not find alternate setting\n");
- kfree(ttusbir);
- return -EINVAL;
- }
-
- /* OK lets setup this interface setting */
- usb_set_interface(ttusbir->udev, 0, ttusbir->alt_setting);
-
- /* Store device info in interface structure */
- usb_set_intfdata(intf, ttusbir);
-
- /* Register as a LIRC driver */
- if (lirc_buffer_init(&ttusbir->rbuf, sizeof(int), 256) < 0) {
- dev_err(&intf->dev, "Could not get memory for LIRC data buffer\n");
- usb_set_intfdata(intf, NULL);
- kfree(ttusbir);
- return -ENOMEM;
- }
- strcpy(ttusbir->driver.name, "TTUSBIR");
- ttusbir->driver.minor = -1;
- ttusbir->driver.code_length = 1;
- ttusbir->driver.sample_rate = 0;
- ttusbir->driver.data = ttusbir;
- ttusbir->driver.add_to_buf = NULL;
- ttusbir->driver.rbuf = &ttusbir->rbuf;
- ttusbir->driver.set_use_inc = set_use_inc;
- ttusbir->driver.set_use_dec = set_use_dec;
- ttusbir->driver.dev = &intf->dev;
- ttusbir->driver.owner = THIS_MODULE;
- ttusbir->driver.features = LIRC_CAN_REC_MODE2;
- ttusbir->minor = lirc_register_driver(&ttusbir->driver);
- if (ttusbir->minor < 0) {
- dev_err(&intf->dev, "Error registering as LIRC driver\n");
- usb_set_intfdata(intf, NULL);
- lirc_buffer_free(&ttusbir->rbuf);
- kfree(ttusbir);
- return -EIO;
- }
-
- /* Allocate and setup the URB that we will use to talk to the device */
- for (i = 0; i < num_urbs; i++) {
- ttusbir->urb[i] = usb_alloc_urb(8, GFP_KERNEL);
- if (!ttusbir->urb[i]) {
- dev_err(&intf->dev, "Could not allocate memory for the URB\n");
- for (j = i - 1; j >= 0; j--)
- kfree(ttusbir->urb[j]);
- lirc_buffer_free(&ttusbir->rbuf);
- lirc_unregister_driver(ttusbir->minor);
- kfree(ttusbir);
- usb_set_intfdata(intf, NULL);
- return -ENOMEM;
- }
- ttusbir->urb[i]->dev = ttusbir->udev;
- ttusbir->urb[i]->context = ttusbir;
- ttusbir->urb[i]->pipe = usb_rcvisocpipe(ttusbir->udev,
- ttusbir->endpoint);
- ttusbir->urb[i]->interval = 1;
- ttusbir->urb[i]->transfer_flags = URB_ISO_ASAP;
- ttusbir->urb[i]->transfer_buffer = &ttusbir->buffer[i][0];
- ttusbir->urb[i]->complete = urb_complete;
- ttusbir->urb[i]->number_of_packets = 8;
- ttusbir->urb[i]->transfer_buffer_length = 128;
- for (j = 0; j < 8; j++) {
- ttusbir->urb[i]->iso_frame_desc[j].offset = j*16;
- ttusbir->urb[i]->iso_frame_desc[j].length = 16;
- }
- }
- return 0;
-}
-
-/**
- * Called when the driver is unloaded or the device is unplugged
- */
-static void disconnect(struct usb_interface *intf)
-{
- int i;
- struct ttusbir_device *ttusbir;
-
- DPRINTK("Module ttusbir disconnect\n");
-
- ttusbir = (struct ttusbir_device *) usb_get_intfdata(intf);
- usb_set_intfdata(intf, NULL);
- lirc_unregister_driver(ttusbir->minor);
- DPRINTK("unregistered\n");
-
- for (i = 0; i < num_urbs; i++) {
- usb_kill_urb(ttusbir->urb[i]);
- usb_free_urb(ttusbir->urb[i]);
- }
- DPRINTK("URBs killed\n");
- lirc_buffer_free(&ttusbir->rbuf);
- kfree(ttusbir);
-}
-
-module_usb_driver(usb_driver);
projects / openwrt / staging / blogic.git / commitdiff