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Currently there is a TODO-like comment in the dediprog driver: "Might be useful for other USB devices as well". Act on this comment by collecting all the device discovery code for libusb1 devices into a separate file. Change-Id: Idfcc79371241c2c1dea97faf5e532aa971546a79 Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-on: https://review.coreboot.org/27443 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2016 secunet Security Networks AG
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* Copyright (C) 2018 Linaro Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <string.h>
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#include <libusb.h>
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#include "programmer.h"
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struct libusb_device_handle *usb_dev_get_by_vid_pid_serial(
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struct libusb_context *usb_ctx, uint16_t vid, uint16_t pid, const char *serialno)
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{
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struct libusb_device **list;
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ssize_t count = libusb_get_device_list(usb_ctx, &list);
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if (count < 0) {
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msg_perr("Getting the USB device list failed (%s)!\n", libusb_error_name(count));
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return NULL;
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}
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ssize_t i = 0;
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for (i = 0; i < count; i++) {
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struct libusb_device *dev = list[i];
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struct libusb_device_descriptor desc;
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struct libusb_device_handle *handle;
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int res = libusb_get_device_descriptor(dev, &desc);
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if (res != 0) {
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msg_perr("Reading the USB device descriptor failed (%s)!\n", libusb_error_name(res));
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continue;
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}
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if ((desc.idVendor != vid) && (desc.idProduct != pid))
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continue;
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msg_pdbg("Found USB device %04"PRIx16":%04"PRIx16" at address %d-%d.\n",
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desc.idVendor, desc.idProduct,
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libusb_get_bus_number(dev), libusb_get_device_address(dev));
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res = libusb_open(dev, &handle);
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if (res != 0) {
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msg_perr("Opening the USB device failed (%s)!\n", libusb_error_name(res));
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continue;
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}
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if (serialno) {
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unsigned char myserial[64];
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res = libusb_get_string_descriptor_ascii(handle, desc.iSerialNumber, myserial,
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sizeof(myserial));
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if (res < 0) {
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msg_perr("Reading the USB serialno failed (%s)!\n", libusb_error_name(res));
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libusb_close(handle);
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continue;
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}
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msg_pdbg("Serial number is %s\n", myserial);
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/* Reject any serial number that does not commence with serialno */
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if (0 != strncmp(serialno, (char *)myserial, strlen(serialno))) {
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libusb_close(handle);
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continue;
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}
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}
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libusb_free_device_list(list, 1);
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return handle;
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}
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libusb_free_device_list(list, 1);
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return NULL;
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}
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/*
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* This function allows different devices to be targeted based on enumeration order. Different
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* hotplug sequencing (or simply a reboot) may change the enumeration order. This function should
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* only be used if a programmers does not provide an alternative way to identify itself uniquely
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* (such as a unique serial number).
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*/
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struct libusb_device_handle *usb_dev_get_by_vid_pid_number(
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struct libusb_context *usb_ctx, uint16_t vid, uint16_t pid, unsigned int num)
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{
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struct libusb_device **list;
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ssize_t count = libusb_get_device_list(usb_ctx, &list);
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if (count < 0) {
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msg_perr("Getting the USB device list failed (%s)!\n", libusb_error_name(count));
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return NULL;
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}
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struct libusb_device_handle *handle = NULL;
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ssize_t i = 0;
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for (i = 0; i < count; i++) {
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struct libusb_device *dev = list[i];
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struct libusb_device_descriptor desc;
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int err = libusb_get_device_descriptor(dev, &desc);
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if (err != 0) {
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msg_perr("Reading the USB device descriptor failed (%s)!\n", libusb_error_name(err));
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libusb_free_device_list(list, 1);
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return NULL;
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}
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if ((desc.idVendor == vid) && (desc.idProduct == pid)) {
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msg_pdbg("Found USB device %04"PRIx16":%04"PRIx16" at address %d-%d.\n",
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desc.idVendor, desc.idProduct,
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libusb_get_bus_number(dev), libusb_get_device_address(dev));
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if (num == 0) {
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err = libusb_open(dev, &handle);
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if (err != 0) {
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msg_perr("Opening the USB device failed (%s)!\n",
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libusb_error_name(err));
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libusb_free_device_list(list, 1);
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return NULL;
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}
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break;
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}
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num--;
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}
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}
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libusb_free_device_list(list, 1);
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return handle;
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}
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