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Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.
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zephyr/include/usb/usb_ch9.h

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/*
* Copyright (c) 2020 PHYTEC Messtechnik GmbH
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief USB Chapter 9 structures and definitions
*
* This file contains the USB Chapter 9 structures definitions
* and follows, with few exceptions, the USB Specification 2.0.
*/
#include <version.h>
#include <sys/util.h>
#ifndef ZEPHYR_INCLUDE_USB_CH9_H_
#define ZEPHYR_INCLUDE_USB_CH9_H_
#ifdef __cplusplus
extern "C" {
#endif
struct usb_req_type_field {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
uint8_t recipient : 5;
uint8_t type : 2;
uint8_t direction : 1;
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
uint8_t direction : 1;
uint8_t type : 2;
uint8_t recipient : 5;
#endif
} __packed;
/** USB Setup Data packet defined in spec. Table 9-2 */
struct usb_setup_packet {
union {
uint8_t bmRequestType;
struct usb_req_type_field RequestType;
};
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
};
/** USB Setup packet RequestType Direction values (from Table 9-2) */
#define USB_REQTYPE_DIR_TO_DEVICE 0
#define USB_REQTYPE_DIR_TO_HOST 1
/** USB Setup packet RequestType Type values (from Table 9-2) */
#define USB_REQTYPE_TYPE_STANDARD 0
#define USB_REQTYPE_TYPE_CLASS 1
#define USB_REQTYPE_TYPE_VENDOR 2
#define USB_REQTYPE_TYPE_RESERVED 3
/** USB Setup packet RequestType Recipient values (from Table 9-2) */
#define USB_REQTYPE_RECIPIENT_DEVICE 0
#define USB_REQTYPE_RECIPIENT_INTERFACE 1
#define USB_REQTYPE_RECIPIENT_ENDPOINT 2
#define USB_REQTYPE_RECIPIENT_OTHER 3
/** Get data transfer direction from bmRequestType */
#define USB_REQTYPE_GET_DIR(bmRequestType) (((bmRequestType) >> 7) & 0x01U)
/** Get request type from bmRequestType */
#define USB_REQTYPE_GET_TYPE(bmRequestType) (((bmRequestType) >> 5) & 0x03U)
/** Get request recipient from bmRequestType */
#define USB_REQTYPE_GET_RECIPIENT(bmRequestType) ((bmRequestType) & 0x1FU)
/**
* @brief Check if request transfer direction is to host.
*
* @param setup Pointer to USB Setup packet
* @return true If transfer direction is to host
*/
static inline bool usb_reqtype_is_to_host(struct usb_setup_packet *setup)
{
return setup->RequestType.direction == USB_REQTYPE_DIR_TO_HOST;
}
/**
* @brief Check if request transfer direction is to device.
*
* @param setup Pointer to USB Setup packet
* @return true If transfer direction is to device
*/
static inline bool usb_reqtype_is_to_device(struct usb_setup_packet *setup)
{
return setup->RequestType.direction == USB_REQTYPE_DIR_TO_DEVICE;
}
/** USB Standard Request Codes defined in spec. Table 9-4 */
#define USB_SREQ_GET_STATUS 0x00
#define USB_SREQ_CLEAR_FEATURE 0x01
#define USB_SREQ_SET_FEATURE 0x03
#define USB_SREQ_SET_ADDRESS 0x05
#define USB_SREQ_GET_DESCRIPTOR 0x06
#define USB_SREQ_SET_DESCRIPTOR 0x07
#define USB_SREQ_GET_CONFIGURATION 0x08
#define USB_SREQ_SET_CONFIGURATION 0x09
#define USB_SREQ_GET_INTERFACE 0x0A
#define USB_SREQ_SET_INTERFACE 0x0B
#define USB_SREQ_SYNCH_FRAME 0x0C
/** Descriptor Types defined in spec. Table 9-5 */
#define USB_DESC_DEVICE 1
#define USB_DESC_CONFIGURATION 2
#define USB_DESC_STRING 3
#define USB_DESC_INTERFACE 4
#define USB_DESC_ENDPOINT 5
#define USB_DESC_DEVICE_QUALIFIER 6
#define USB_DESC_OTHER_SPEED 7
#define USB_DESC_INTERFACE_POWER 8
/** Additional Descriptor Types defined in USB 3 spec. Table 9-5 */
#define USB_DESC_OTG 9
#define USB_DESC_DEBUG 10
#define USB_DESC_INTERFACE_ASSOC 11
#define USB_DESC_BOS 15
#define USB_DESC_DEVICE_CAPABILITY 16
/** Class-Specific Descriptor Types as defined by
* USB Common Class Specification
*/
#define USB_DESC_CS_DEVICE 0x21
#define USB_DESC_CS_CONFIGURATION 0x22
#define USB_DESC_CS_STRING 0x23
#define USB_DESC_CS_INTERFACE 0x24
#define USB_DESC_CS_ENDPOINT 0x25
/** USB Standard Feature Selectors defined in spec. Table 9-6 */
#define USB_SFS_ENDPOINT_HALT 0x00
#define USB_SFS_REMOTE_WAKEUP 0x01
#define USB_SFS_TEST_MODE 0x02
/** Bits used for GetStatus response defined in spec. Figure 9-4 */
#define USB_GET_STATUS_SELF_POWERED BIT(0)
#define USB_GET_STATUS_REMOTE_WAKEUP BIT(1)
/** Header of an USB descriptor */
struct usb_desc_header {
uint8_t bLength;
uint8_t bDescriptorType;
} __packed;
/** USB Standard Device Descriptor defined in spec. Table 9-8 */
struct usb_device_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t bcdUSB;
uint8_t bDeviceClass;
uint8_t bDeviceSubClass;
uint8_t bDeviceProtocol;
uint8_t bMaxPacketSize0;
uint16_t idVendor;
uint16_t idProduct;
uint16_t bcdDevice;
uint8_t iManufacturer;
uint8_t iProduct;
uint8_t iSerialNumber;
uint8_t bNumConfigurations;
} __packed;
/** USB Standard Configuration Descriptor defined in spec. Table 9-10 */
struct usb_cfg_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t wTotalLength;
uint8_t bNumInterfaces;
uint8_t bConfigurationValue;
uint8_t iConfiguration;
uint8_t bmAttributes;
uint8_t bMaxPower;
} __packed;
/** USB Standard Interface Descriptor defined in spec. Table 9-12 */
struct usb_if_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bInterfaceNumber;
uint8_t bAlternateSetting;
uint8_t bNumEndpoints;
uint8_t bInterfaceClass;
uint8_t bInterfaceSubClass;
uint8_t bInterfaceProtocol;
uint8_t iInterface;
} __packed;
/** USB Standard Endpoint Descriptor defined in spec. Table 9-13 */
struct usb_ep_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bEndpointAddress;
uint8_t bmAttributes;
uint16_t wMaxPacketSize;
uint8_t bInterval;
} __packed;
/** USB Unicode (UTF16LE) String Descriptor defined in spec. Table 9-15 */
struct usb_string_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t bString;
} __packed;
/** USB Association Descriptor defined in USB 3 spec. Table 9-16 */
struct usb_association_descriptor {
uint8_t bLength;
uint8_t bDescriptorType;
uint8_t bFirstInterface;
uint8_t bInterfaceCount;
uint8_t bFunctionClass;
uint8_t bFunctionSubClass;
uint8_t bFunctionProtocol;
uint8_t iFunction;
} __packed;
/** USB Standard Configuration Descriptor Characteristics from Table 9-10 */
#define USB_SCD_RESERVED BIT(7)
#define USB_SCD_SELF_POWERED BIT(6)
#define USB_SCD_REMOTE_WAKEUP BIT(5)
/** USB Defined Base Class Codes from https://www.usb.org/defined-class-codes */
#define USB_BCC_AUDIO 0x01
#define USB_BCC_CDC_CONTROL 0x02
#define USB_BCC_HID 0x03
#define USB_BCC_MASS_STORAGE 0x08
#define USB_BCC_CDC_DATA 0x0A
#define USB_BCC_VIDEO 0x0E
#define USB_BCC_WIRELESS_CONTROLLER 0xE0
#define USB_BCC_MISCELLANEOUS 0xEF
#define USB_BCC_APPLICATION 0xFE
#define USB_BCC_VENDOR 0xFF
/** USB Specification Release Numbers (bcdUSB Descriptor field) */
#define USB_SRN_1_1 0x0110
#define USB_SRN_2_0 0x0200
#define USB_SRN_2_1 0x0210
#define USB_DEC_TO_BCD(dec) ((((dec) / 10) << 4) | ((dec) % 10))
/** USB Device release number (bcdDevice Descriptor field) */
#define USB_BCD_DRN (USB_DEC_TO_BCD(KERNEL_VERSION_MAJOR) << 8 | \
USB_DEC_TO_BCD(KERNEL_VERSION_MINOR))
/** Macro to obtain descriptor type from USB_SREQ_GET_DESCRIPTOR request */
#define USB_GET_DESCRIPTOR_TYPE(wValue) ((uint8_t)((wValue) >> 8))
/** Macro to obtain descriptor index from USB_SREQ_GET_DESCRIPTOR request */
#define USB_GET_DESCRIPTOR_INDEX(wValue) ((uint8_t)(wValue))
/** USB Control Endpoints OUT and IN Address */
#define USB_CONTROL_EP_OUT 0
#define USB_CONTROL_EP_IN 0x80
/** USB Control Endpoints maximum packet size (MPS) */
#define USB_CONTROL_EP_MPS 64
#ifdef __cplusplus
}
#endif
#endif /* ZEPHYR_INCLUDE_USB_CH9_H_ */