| // Copyright 2016 The Fuchsia 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 <dirent.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <zircon/device/usb-device.h> |
| #include <zircon/device/usb-virt-bus.h> |
| #include <zircon/hw/usb-cdc.h> |
| |
| #include <zircon/types.h> |
| |
| #define DEV_VIRTUAL_USB "/dev/misc/usb-virtual-bus" |
| #define DEV_USB_DEVICE_DIR "/dev/class/usb-device" |
| |
| #define GOOGLE_VID 0x18D1 |
| #define GOOGLE_CDC_PID 0xA020 |
| #define GOOGLE_UMS_PID 0xA021 |
| |
| #define MANUFACTURER_STRING "Zircon" |
| #define CDC_PRODUCT_STRING "CDC Ethernet" |
| #define UMS_PRODUCT_STRING "USB Mass Storage" |
| #define SERIAL_STRING "12345678" |
| |
| const usb_function_descriptor_t cdc_function_desc = { |
| .interface_class = USB_CLASS_COMM, |
| .interface_subclass = USB_CDC_SUBCLASS_ETHERNET, |
| .interface_protocol = 0, |
| }; |
| |
| const usb_function_descriptor_t ums_function_desc = { |
| .interface_class = USB_CLASS_MSC, |
| .interface_subclass = USB_SUBCLASS_MSC_SCSI, |
| .interface_protocol = USB_PROTOCOL_MSC_BULK_ONLY, |
| }; |
| |
| typedef struct { |
| const usb_function_descriptor_t* desc; |
| const char* product_string; |
| uint16_t vid; |
| uint16_t pid; |
| } usb_function_t; |
| |
| static const usb_function_t cdc_function = { |
| .desc = &cdc_function_desc, |
| .product_string = CDC_PRODUCT_STRING, |
| .vid = GOOGLE_VID, |
| .pid = GOOGLE_CDC_PID, |
| }; |
| |
| static const usb_function_t ums_function = { |
| .desc = &ums_function_desc, |
| .product_string = UMS_PRODUCT_STRING, |
| .vid = GOOGLE_VID, |
| .pid = GOOGLE_UMS_PID, |
| }; |
| |
| static usb_device_descriptor_t device_desc = { |
| .bLength = sizeof(usb_device_descriptor_t), |
| .bDescriptorType = USB_DT_DEVICE, |
| .bcdUSB = htole16(0x0200), |
| .bDeviceClass = 0, |
| .bDeviceSubClass = 0, |
| .bDeviceProtocol = 0, |
| .bMaxPacketSize0 = 64, |
| // idVendor and idProduct are filled in later |
| .bcdDevice = htole16(0x0100), |
| // iManufacturer, iProduct and iSerialNumber are filled in later |
| .bNumConfigurations = 1, |
| }; |
| |
| static int open_usb_device(void) { |
| struct dirent* de; |
| DIR* dir = opendir(DEV_USB_DEVICE_DIR); |
| if (!dir) { |
| printf("Error opening %s\n", DEV_USB_DEVICE_DIR); |
| return -1; |
| } |
| |
| while ((de = readdir(dir)) != NULL) { |
| char devname[128]; |
| |
| snprintf(devname, sizeof(devname), "%s/%s", DEV_USB_DEVICE_DIR, de->d_name); |
| int fd = open(devname, O_RDWR); |
| if (fd < 0) { |
| printf("Error opening %s\n", devname); |
| continue; |
| } |
| |
| closedir(dir); |
| return fd; |
| } |
| |
| closedir(dir); |
| return -1; |
| } |
| |
| static zx_status_t device_init(int fd, const usb_function_t* function) { |
| device_desc.idVendor = htole16(function->vid); |
| device_desc.idProduct = htole16(function->pid); |
| |
| // allocate string descriptors |
| zx_status_t status = ioctl_usb_device_alloc_string_desc(fd, MANUFACTURER_STRING, |
| strlen(MANUFACTURER_STRING) + 1, |
| &device_desc.iManufacturer); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_alloc_string_desc failed: %d\n", status); |
| return status; |
| } |
| status = ioctl_usb_device_alloc_string_desc(fd, function->product_string, |
| strlen(function->product_string) + 1, |
| &device_desc.iProduct); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_alloc_string_desc failed: %d\n", status); |
| return status; |
| } |
| status = ioctl_usb_device_alloc_string_desc(fd, SERIAL_STRING, strlen(SERIAL_STRING) + 1, |
| &device_desc.iSerialNumber); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_alloc_string_desc failed: %d\n", status); |
| return status; |
| } |
| |
| // set device descriptor |
| status = ioctl_usb_device_set_device_desc(fd, &device_desc); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_set_device_desc failed: %d\n", status); |
| return status; |
| } |
| |
| |
| status = ioctl_usb_device_add_function(fd, function->desc); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_add_function failed: %d\n", status); |
| return status; |
| } |
| |
| status = ioctl_usb_device_bind_functions(fd); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_bind_functions failed: %d\n", status); |
| } |
| |
| return status; |
| } |
| |
| static int device_command(int argc, const char** argv) { |
| int fd = open_usb_device(); |
| if (fd < 0) { |
| fprintf(stderr, "could not find a device in %s\n", DEV_USB_DEVICE_DIR); |
| return fd; |
| } |
| |
| if (argc != 2) { |
| goto usage; |
| } |
| |
| zx_status_t status = ZX_OK; |
| const char* command = argv[1]; |
| if (!strcmp(command, "reset")) { |
| status = ioctl_usb_device_clear_functions(fd); |
| } else if (!strcmp(command, "init-cdc")) { |
| status = device_init(fd, &cdc_function); |
| } else if (!strcmp(command, "init-ums")) { |
| status = device_init(fd, &ums_function); |
| } else { |
| goto usage; |
| } |
| |
| close(fd); |
| return status == ZX_OK ? 0 : -1; |
| |
| usage: |
| close(fd); |
| fprintf(stderr, "usage: usbctl device [reset|init-ums]\n"); |
| return -1; |
| } |
| |
| static int mode_command(int argc, const char** argv) { |
| zx_status_t status = ZX_OK; |
| |
| int fd = open_usb_device(); |
| if (fd < 0) { |
| return fd; |
| } |
| |
| if (argc == 1) { |
| // print current mode |
| usb_mode_t mode; |
| status = ioctl_usb_device_get_mode(fd, &mode); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_get_mode failed: %d\n", status); |
| } else { |
| switch (mode) { |
| case USB_MODE_NONE: |
| printf("NONE\n"); |
| break; |
| case USB_MODE_HOST: |
| printf("HOST\n"); |
| break; |
| case USB_MODE_DEVICE: |
| printf("DEVICE\n"); |
| break; |
| case USB_MODE_OTG: |
| printf("OTG\n"); |
| break; |
| default: |
| printf("unknown mode %d\n", mode); |
| break; |
| } |
| } |
| } else { |
| usb_mode_t mode; |
| if (strcasecmp(argv[1], "none") == 0) { |
| mode = USB_MODE_NONE; |
| } else if (strcasecmp(argv[1], "host") == 0) { |
| mode = USB_MODE_HOST; |
| } else if (strcasecmp(argv[1], "device") == 0) { |
| mode = USB_MODE_DEVICE; |
| } else if (strcasecmp(argv[1], "otg") == 0) { |
| mode = USB_MODE_OTG; |
| } else { |
| fprintf(stderr, "unknown USB mode %s\n", argv[1]); |
| status = ZX_ERR_INVALID_ARGS; |
| } |
| |
| if (status == ZX_OK) { |
| status = ioctl_usb_device_set_mode(fd, &mode); |
| if (status < 0) { |
| fprintf(stderr, "ioctl_usb_device_set_mode failed: %d\n", status); |
| } |
| } |
| } |
| |
| close(fd); |
| return status; |
| } |
| |
| |
| static int virtual_command(int argc, const char** argv) { |
| int fd = open(DEV_VIRTUAL_USB, O_RDWR); |
| if (fd < 0) { |
| fprintf(stderr, "could not open %s\n", DEV_VIRTUAL_USB); |
| return fd; |
| } |
| |
| if (argc != 2) { |
| goto usage; |
| } |
| |
| zx_status_t status = ZX_OK; |
| const char* command = argv[1]; |
| if (!strcmp(command, "enable")) { |
| int enabled = 1; |
| status = ioctl_usb_virt_bus_enable(fd, &enabled); |
| } else if (!strcmp(command, "disable")) { |
| int enabled = 0; |
| status = ioctl_usb_virt_bus_enable(fd, &enabled); |
| } else if (!strcmp(command, "connect")) { |
| int connected = 1; |
| status = ioctl_usb_virt_bus_set_connected(fd, &connected); |
| } else if (!strcmp(command, "disconnect")) { |
| int connected = 0; |
| status = ioctl_usb_virt_bus_set_connected(fd, &connected); |
| } else { |
| goto usage; |
| } |
| |
| close(fd); |
| return status == ZX_OK ? 0 : -1; |
| |
| usage: |
| close(fd); |
| fprintf(stderr, "usage: usbctl virtual [enable|disable|connect|disconnect]\n"); |
| return -1; |
| } |
| |
| typedef struct { |
| const char* name; |
| int (*command)(int argc, const char* argv[]); |
| const char* description; |
| } usbctl_command_t; |
| |
| static usbctl_command_t commands[] = { |
| { |
| "device", |
| device_command, |
| "device [reset|init-cdc|init-ums] resets the device or " |
| "initializes the UMS function" |
| }, |
| { |
| "mode", |
| mode_command, |
| "mode [none|host|device|otg] sets the current USB mode. " |
| "Returns the current mode if no additional arugment is provided." |
| }, |
| { |
| "virtual", |
| virtual_command, |
| "virtual [enable|disable|connect|disconnect] - controls USB virtual bus" |
| }, |
| { NULL, NULL, NULL }, |
| }; |
| |
| static void usage(void) { |
| fprintf(stderr, "usage: \"usbctl <command>\", where command is one of:\n"); |
| |
| usbctl_command_t* command = commands; |
| while (command->name) { |
| fprintf(stderr, " %s\n", command->description); |
| command++; |
| } |
| } |
| |
| int main(int argc, const char** argv) { |
| if (argc < 2) { |
| usage(); |
| return -1; |
| } |
| |
| const char* command_name = argv[1]; |
| usbctl_command_t* command = commands; |
| while (command->name) { |
| if (!strcmp(command_name, command->name)) { |
| return command->command(argc - 1, argv + 1); |
| } |
| command++; |
| } |
| |
| usage(); |
| return -1; |
| } |