diff options
Diffstat (limited to 'src/usb.c')
| -rw-r--r-- | src/usb.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/usb.c b/src/usb.c new file mode 100644 index 0000000..8e87474 --- /dev/null +++ b/src/usb.c @@ -0,0 +1,170 @@ +/* + * Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr> + * + * 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 3 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, see <http://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> +#include <stdio.h> +#include <libusb.h> + +#include "lg-downloader.h" +#include "usb.h" + +int usb_open(struct context *context) +{ + struct libusb_device_handle *handle; + int rc; + + if (context == NULL) + return -1; + + rc = libusb_init(NULL); + if (rc < 0) { + fprintf(stderr, "Initializing libusb failed\n"); + return -1; + } + + handle = libusb_open_device_with_vid_pid(NULL, USB_VENDOR_LG, USB_DEVICE_DOWNLOAD); + if (handle == NULL) { + fprintf(stderr, "Finding and opening USB device failed\n"); + fprintf(stderr, "\nDevice might be missing or you may not have the rights to do this\n"); + goto error; + } + + libusb_detach_kernel_driver(handle, USB_INTERFACE); + + rc = libusb_set_configuration(handle, USB_CONFIGURATION); + if (rc < 0) { + fprintf(stderr, "Setting USB configuration failed\n"); + goto error; + } + + rc = libusb_claim_interface(handle, USB_INTERFACE); + if (rc < 0) { + fprintf(stderr, "Claiming USB interface failed\n"); + goto error; + } + + context->usb_handle = handle; + + rc = 0; + goto complete; + +error: + rc = -1; + + if (handle != NULL) + libusb_close(handle); + + libusb_exit(NULL); + +complete: + return rc; +} + +void usb_close(struct context *context) +{ + if (context == NULL) + return; + + if (context->usb_handle != NULL) { + libusb_release_interface(context->usb_handle, USB_INTERFACE); + libusb_close(context->usb_handle); + + context->usb_handle = NULL; + + libusb_exit(NULL); + } +} + +int usb_send(struct context *context, const void *data, unsigned int size) +{ + unsigned int count; + unsigned int chunk; + unsigned char *p; + int transferred; + int rc; + + if (context == NULL) + return -1; + + count = 0; + p = (unsigned char *) data; + + while (count < size) { + chunk = (size - count) < USB_SEND_CHUNK ? (size - count) : USB_SEND_CHUNK; + + rc = libusb_bulk_transfer(context->usb_handle, USB_ENDPOINT_OUT, p, chunk, &transferred, USB_TIMEOUT); + if (rc < 0 || transferred <= 0) { + fprintf(stderr, "sBulk USB transfer failed\n"); + return -1; + } + + count += transferred; + p += transferred; + } + + return 0; +} + +int usb_recv(struct context *context, void *data, unsigned int size) +{ + unsigned int count; + unsigned int chunk; + unsigned char *p; + int transferred; + int rc; + + if (context == NULL) + return -1; + + count = 0; + p = (unsigned char *) data; + + while (count < size) { + chunk = (size - count) < USB_RECV_CHUNK ? (size - count) : USB_RECV_CHUNK; + + rc = libusb_bulk_transfer(context->usb_handle, USB_ENDPOINT_IN, p, chunk, &transferred, USB_TIMEOUT); + if (rc < 0 || transferred <= 0) { + fprintf(stderr, "Bulk USB transfer failed\n"); + return -1; + } + + count += transferred; + p += transferred; + } + + return 0; +} + +int usb_recv_available(struct context *context, void *data, unsigned int size) +{ + unsigned int chunk; + int transferred; + int rc; + + if (context == NULL) + return -1; + + chunk = size < USB_RECV_CHUNK ? size : USB_RECV_CHUNK; + + rc = libusb_bulk_transfer(context->usb_handle, USB_ENDPOINT_IN, data, chunk, &transferred, USB_TIMEOUT); + if (rc < 0 || transferred <= 0) { + fprintf(stderr, "Bulk USB transfer failed\n"); + return -1; + } + + return transferred; +} |