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authorJack Rosenthal <jrosenth@chromium.org>2021-11-04 12:11:58 -0600
committerCommit Bot <commit-bot@chromium.org>2021-11-05 04:22:34 +0000
commit252457d4b21f46889eebad61d4c0a65331919cec (patch)
tree01856c4d31d710b20e85a74c8d7b5836e35c3b98 /util/usb_if.c
parent08f5a1e6fc2c9467230444ac9b582dcf4d9f0068 (diff)
downloadchrome-ec-release-R99-14469.B-ish.tar.gz
In the interest of making long-term branch maintenance incur as little technical debt on us as possible, we should not maintain any files on the branch we are not actually using. This has the added effect of making it extremely clear when merging CLs from the main branch when changes have the possibility to affect us. The follow-on CL adds a convenience script to actually pull updates from the main branch and generate a CL for the update. BUG=b:204206272 BRANCH=ish TEST=make BOARD=arcada_ish && make BOARD=drallion_ish Signed-off-by: Jack Rosenthal <jrosenth@chromium.org> Change-Id: I17e4694c38219b5a0823e0a3e55a28d1348f4b18 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3262038 Reviewed-by: Jett Rink <jettrink@chromium.org> Reviewed-by: Tom Hughes <tomhughes@chromium.org>
Diffstat (limited to 'util/usb_if.c')
-rw-r--r--util/usb_if.c229
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);
-}