mirror of
git://projects.qi-hardware.com/f32xbase.git
synced 2024-11-16 21:44:05 +02:00
79396b1777
to missing parentheses in device selection caused it to just pick the first device it found.
100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
/*
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* lib/usb.c - Common USB code for F32Xbase tools
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*
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* Written 2008-2010 by Werner Almesberger
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* Copyright 2008-2010 Werner Almesberger
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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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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <usb.h>
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static uint16_t vendor = 0;
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static uint16_t product = 0;
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usb_dev_handle *open_usb(uint16_t default_vendor, uint16_t default_product)
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{
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const struct usb_bus *bus;
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struct usb_device *dev;
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usb_dev_handle *handle;
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#ifdef DO_FULL_USB_BUREAUCRACY
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int res;
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#endif
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usb_init();
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usb_find_busses();
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usb_find_devices();
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for (bus = usb_get_busses(); bus; bus = bus->next)
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for (dev = bus->devices; dev; dev = dev->next) {
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if (dev->descriptor.idVendor !=
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(vendor ? vendor : default_vendor))
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continue;
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if (dev->descriptor.idProduct !=
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(product ? product : default_product))
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continue;
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handle = usb_open(dev);
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#ifdef DO_FULL_USB_BUREAUCRACY
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if (!handle)
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return NULL;
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res = usb_set_configuration(handle, 1);
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if (res < 0) {
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fprintf(stderr, "usb_set_configuration: %d\n",
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res);
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return NULL;
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}
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res = usb_claim_interface(handle, 0);
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if (res < 0) {
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fprintf(stderr, "usb_claim_interface: %d\n",
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res);
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return NULL;
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}
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res = usb_set_altinterface(handle, 0);
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if (res < 0) {
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fprintf(stderr, "usb_set_altinterface: %d\n",
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res);
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return NULL;
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}
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#endif
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return handle;
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}
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return NULL;
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}
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static void bad_id(const char *id)
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{
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fprintf(stderr, "\"%s\" is not a valid vendor:product ID\n", id);
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exit(1);
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}
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void parse_usb_id(const char *id)
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{
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unsigned long tmp;
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char *end;
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tmp = strtoul(id, &end, 16);
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if (*end != ':')
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bad_id(id);
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if (tmp > 0xffff)
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bad_id(id);
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vendor = tmp;
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tmp = strtoul(end+1, &end, 16);
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if (*end)
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bad_id(id);
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if (tmp > 0xffff)
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bad_id(id);
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product = tmp;
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}
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