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usb: Implemented support for sending the Microsoft OS-specific descriptor component of a platform capability descriptor

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This commit is contained in:
dragonmux
2022-08-11 07:52:43 +01:00
committed by Piotr Esden-Tempski
parent c1247110d8
commit b7ddb7c7c0
3 changed files with 26 additions and 1 deletions
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4
include/libopencm3/usb/bos.h
View File

@@ -87,6 +87,8 @@ typedef struct __attribute__((packed)) usb_bos_uuid {
uint8_t e[6];
} usb_bos_uuid;
#define USB_BOS_UUID_SIZE sizeof(usb_bos_uuid)
typedef struct usb_device_capability_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
@@ -125,6 +127,8 @@ typedef struct __attribute__((packed)) usb_platform_device_capability_descriptor
usb_bos_uuid PlatformCapabilityUUID;
/* Descriptor ends here. The following are used internally: */
/* This is a type-erased struct of the platform-specific capability data */
const void *CapabilityData;
} usb_platform_device_capability_descriptor;
#define USB_DCT_PLATFORM_SIZE 20U

11
include/libopencm3/usb/microsoft.h
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@@ -76,6 +76,17 @@ enum microsoft_registry_types {
{0x65U, 0x9dU, 0x9eU, 0x64U, 0x8aU, 0x9fU}, \
}
#define MICROSOFT_WINDOWS_VERSION_WINBLUE 0x06030000
typedef struct microsoft_os_descriptor_set_information {
uint32_t dwWindowsVersion;
uint16_t wMSOSDescriptorSetTotalLength;
uint8_t bMS_VendorCode;
uint8_t bAltEnumCode;
} microsoft_os_descriptor_set_information;
#define MICROSOFT_OS_DESCRIPTOR_SET_INFORMATION_SIZE sizeof(microsoft_os_descriptor_set_information)
#endif
/**@}*/

12
lib/usb/usb_standard.c
View File

@@ -38,8 +38,12 @@ LGPL License Terms @ref lgpl_license
#include <string.h>
#include <libopencm3/usb/usbd.h>
#include <libopencm3/usb/bos.h>
#include <libopencm3/usb/microsoft.h>
#include "usb_private.h"
static const usb_bos_uuid microsoft_os_descriptor_platform_capability_id =
MICROSOFT_OS_DESCRIPTOR_PLATFORM_CAPABILITY_ID;
int usbd_register_set_config_callback(usbd_device *usbd_dev,
usbd_set_config_callback callback)
{
@@ -149,8 +153,14 @@ static uint16_t build_devcap_platform(const usb_platform_device_capability_descr
len -= count;
const uint16_t total = count;
if (!memcmp(&plat->PlatformCapabilityUUID, &microsoft_os_descriptor_platform_capability_id, USB_BOS_UUID_SIZE)) {
const microsoft_os_descriptor_set_information *info = plat->CapabilityData;
count = MIN(len, MICROSOFT_OS_DESCRIPTOR_SET_INFORMATION_SIZE);
memcpy(buf + total, info, count);
return total + count;
}
return total;
return 0;
}
/* This can return 0 to indicate an error in the descriptor */