1 // Copyright 2018 The Fuchsia Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <fuchsia/usb/debug/c/fidl.h>
6 #include <lib/fzl/fdio.h>
7
8 #include <dirent.h>
9 #include <fcntl.h>
10 #include <stdio.h>
11
12 #include <utility>
13
14 #include "xdc-init.h"
15
16 static const char* const DEV_XDC_DIR = "/dev/class/usb-dbc";
17
configure_xdc(uint32_t stream_id,fbl::unique_fd * out_fd)18 zx_status_t configure_xdc(uint32_t stream_id, fbl::unique_fd* out_fd) {
19 DIR* d = opendir(DEV_XDC_DIR);
20 if (d == nullptr) {
21 fprintf(stderr, "Could not open dir: \"%s\"\n", DEV_XDC_DIR);
22 return ZX_ERR_BAD_STATE;
23 }
24
25 struct dirent* de;
26 while ((de = readdir(d)) != nullptr) {
27 int fd = openat(dirfd(d), de->d_name, O_RDWR);
28 if (fd < 0) {
29 continue;
30 }
31 fzl::FdioCaller caller{fbl::unique_fd(fd)};
32 zx_status_t status;
33 zx_status_t res = fuchsia_usb_debug_DeviceSetStream(caller.borrow_channel(),
34 stream_id, &status);
35 if (res == ZX_OK) {
36 res = status;
37 }
38 if (res != ZX_OK) {
39 fprintf(stderr, "Failed to set stream id %u for device \"%s/%s\", err: %d\n",
40 stream_id, DEV_XDC_DIR, de->d_name, res);
41 continue;
42 }
43 printf("Configured debug device \"%s/%s\", stream id %u\n",
44 DEV_XDC_DIR, de->d_name, stream_id);
45 *out_fd = caller.release();
46 closedir(d);
47 return ZX_OK;
48 }
49 closedir(d);
50
51 fprintf(stderr, "No debug device found\n");
52 return ZX_ERR_NOT_FOUND;
53 }
54