Signed-off-by: Jarod Wilson <ja...@redhat.com> --- drivers/staging/lirc/lirc_igorplugusb.c | 555 +++++++++++++++++++++++++++++++ 1 files changed, 555 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/lirc/lirc_igorplugusb.c
diff --git a/drivers/staging/lirc/lirc_igorplugusb.c b/drivers/staging/lirc/lirc_igorplugusb.c new file mode 100644 index 0000000..bce600e --- /dev/null +++ b/drivers/staging/lirc/lirc_igorplugusb.c @@ -0,0 +1,555 @@ +/* + * 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 + * <hochst...@algo.informatik.tu-darmstadt.de> + * + * This driver was derived from: + * Paul Miller <pmill...@users.sourceforge.net> + * "lirc_atiusb" module + * Vladimir Dergachev <volo...@minspring.com>'s 2002 + * "USB ATI Remote support" (input device) + * Adrian Dewhurst <sailor...@sailorfrag.net>'s 2002 + * "USB StreamZap remote driver" (LIRC) + * Artur Lipowski <alipow...@kki.net.pl>'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 <linux/module.h> +#include <linux/kernel.h> +#include <linux/kmod.h> +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/usb.h> +#include <linux/time.h> + +#include <media/lirc.h> +#include <media/lirc_dev.h> + + +/* module identification */ +#define DRIVER_VERSION "0.1" +#define DRIVER_AUTHOR \ + "Jan M. Hochstein <hochst...@algo.informatik.tu-darmstadt.de>" +#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 <linux/vermagic.h> +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)"); + -- 1.7.1.1 -- Jarod Wilson ja...@redhat.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
