diff options
Diffstat (limited to 'util/usb_if.c')
| -rw-r--r-- | util/usb_if.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/util/usb_if.c b/util/usb_if.c deleted file mode 100644 index f8aa6bfd7e..0000000000 --- a/util/usb_if.c +++ /dev/null @@ -1,229 +0,0 @@ -/* - * Copyright 2018 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "usb_if.h" - -/* Return 0 on error, since it's never gonna be EP 0 */ -static int find_endpoint(const struct libusb_interface_descriptor *iface, - uint16_t subclass, - uint16_t protocol, - struct usb_endpoint *uep) -{ - const struct libusb_endpoint_descriptor *ep; - - if (iface->bInterfaceClass == 255 && - iface->bInterfaceSubClass == subclass && - iface->bInterfaceProtocol == protocol && - iface->bNumEndpoints) { - ep = &iface->endpoint[0]; - uep->ep_num = ep->bEndpointAddress & 0x7f; - uep->chunk_len = ep->wMaxPacketSize; - return 1; - } - - return 0; -} - -/* Return -1 on error */ -static int find_interface(uint16_t subclass, - uint16_t protocol, - struct usb_endpoint *uep) -{ - int iface_num = -1; - int r, i, j; - struct libusb_device *dev; - struct libusb_config_descriptor *conf = 0; - const struct libusb_interface *iface0; - const struct libusb_interface_descriptor *iface; - - dev = libusb_get_device(uep->devh); - r = libusb_get_active_config_descriptor(dev, &conf); - if (r < 0) { - USB_ERROR("libusb_get_active_config_descriptor", r); - goto out; - } - - for (i = 0; i < conf->bNumInterfaces; i++) { - iface0 = &conf->interface[i]; - for (j = 0; j < iface0->num_altsetting; j++) { - iface = &iface0->altsetting[j]; - if (find_endpoint(iface, subclass, protocol, uep)) { - iface_num = i; - goto out; - } - } - } - -out: - libusb_free_config_descriptor(conf); - return iface_num; -} - -static libusb_device_handle *check_device(libusb_device *dev, - uint16_t vid, uint16_t pid, const char *serial) -{ - struct libusb_device_descriptor desc; - libusb_device_handle *handle = NULL; - char sn[256]; - size_t sn_size = 0; - - if (libusb_get_device_descriptor(dev, &desc) < 0) - return NULL; - - if (libusb_open(dev, &handle) != LIBUSB_SUCCESS) - return NULL; - - if (desc.iSerialNumber && serial) { - sn_size = libusb_get_string_descriptor_ascii(handle, - desc.iSerialNumber, (unsigned char *)sn, - sizeof(sn)); - } - /* - * If the VID, PID, and serial number don't match, then it's not the - * correct device. Close the handle and return NULL. - */ - if ((vid && vid != desc.idVendor) || - (pid && pid != desc.idProduct) || - (serial && ((sn_size != strlen(serial)) || - memcmp(sn, serial, sn_size)))) { - libusb_close(handle); - return NULL; - } - return handle; -} - -int usb_findit(const char *serial, uint16_t vid, uint16_t pid, - uint16_t subclass, uint16_t protocol, struct usb_endpoint *uep) -{ - int iface_num, r, i; - libusb_device **devs; - libusb_device_handle *devh = NULL; - ssize_t count; - - memset(uep, 0, sizeof(*uep)); - - /* Must supply either serial or vendor and product ids. */ - if (!serial && !(vid && pid)) - goto terminate_usb_findit; - - r = libusb_init(NULL); - if (r < 0) { - USB_ERROR("libusb_init", r); - goto terminate_usb_findit; - } - - printf("finding_device "); - if (vid) - printf("%04x:%04x ", vid, pid); - if (serial) - printf("%s", serial); - printf("\n"); - - count = libusb_get_device_list(NULL, &devs); - if (count < 0) - goto terminate_usb_findit; - - for (i = 0; i < count; i++) { - devh = check_device(devs[i], vid, pid, serial); - if (devh) { - printf("Found device.\n"); - break; - } - } - - libusb_free_device_list(devs, 1); - - if (!devh) { - fprintf(stderr, "Can't find device\n"); - goto terminate_usb_findit; - } - uep->devh = devh; - - iface_num = find_interface(subclass, protocol, uep); - if (iface_num < 0) { - fprintf(stderr, "USB interface %d is not found\n", uep->ep_num); - goto terminate_usb_findit; - } - if (!uep->chunk_len) { - fprintf(stderr, "wMaxPacketSize isn't valid\n"); - goto terminate_usb_findit; - } - - printf("found interface %d endpoint %d, chunk_len %d\n", - iface_num, uep->ep_num, uep->chunk_len); - - libusb_set_auto_detach_kernel_driver(uep->devh, 1); - r = libusb_claim_interface(uep->devh, iface_num); - if (r < 0) { - USB_ERROR("libusb_claim_interface", r); - goto terminate_usb_findit; - } - - printf("READY\n-------\n"); - return 0; - -terminate_usb_findit: - if (uep->devh) - usb_shut_down(uep); - return -1; -} - -int usb_trx(struct usb_endpoint *uep, void *outbuf, int outlen, - void *inbuf, int inlen, int allow_less, size_t *rxed_count) -{ - - int r, actual; - - /* Send data out */ - if (outbuf && outlen) { - actual = 0; - r = libusb_bulk_transfer(uep->devh, uep->ep_num, - outbuf, outlen, - &actual, 1000); - if (r < 0) { - USB_ERROR("libusb_bulk_transfer", r); - return -1; - } - if (actual != outlen) { - fprintf(stderr, "%s:%d, only sent %d/%d bytes\n", - __FILE__, __LINE__, actual, outlen); - usb_shut_down(uep); - } - } - - /* Read reply back */ - if (inbuf && inlen) { - - actual = 0; - r = libusb_bulk_transfer(uep->devh, uep->ep_num | 0x80, - inbuf, inlen, - &actual, 1000); - if (r < 0) { - USB_ERROR("libusb_bulk_transfer", r); - return -1; - } - if ((actual != inlen) && !allow_less) { - fprintf(stderr, "%s:%d, only received %d/%d bytes\n", - __FILE__, __LINE__, actual, inlen); - usb_shut_down(uep); - } - - if (rxed_count) - *rxed_count = actual; - } - - return 0; -} - -void usb_shut_down(struct usb_endpoint *uep) -{ - libusb_close(uep->devh); - libusb_exit(NULL); -} |