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Data Structures | Macros | Functions
usb_ch9.h File Reference

USB Chapter 9 structures and definitions. More...

#include <zephyr/version.h>
#include <zephyr/sys/util.h>
#include <zephyr/math/ilog2.h>
#include <zephyr/usb/class/usb_hub.h>

Go to the source code of this file.

Data Structures

struct  usb_req_type_field
 
struct  usb_setup_packet
 USB Setup Data packet defined in spec. More...
 
struct  usb_desc_header
 Header of an USB descriptor. More...
 
struct  usb_device_descriptor
 USB Standard Device Descriptor defined in spec. More...
 
struct  usb_device_qualifier_descriptor
 USB Device Qualifier Descriptor defined in spec. More...
 
struct  usb_cfg_descriptor
 USB Standard Configuration Descriptor defined in spec. More...
 
struct  usb_if_descriptor
 USB Standard Interface Descriptor defined in spec. More...
 
struct  usb_ep_desc_bmattr
 
struct  usb_ep_descriptor
 USB Standard Endpoint Descriptor defined in spec. More...
 
struct  usb_string_descriptor
 USB Unicode (UTF16LE) String Descriptor defined in spec. More...
 
struct  usb_association_descriptor
 USB Association Descriptor defined in USB 3 spec. More...
 

Macros

#define USB_REQTYPE_DIR_TO_DEVICE   0
 USB Setup packet RequestType Direction values (from Table 9-2)
 
#define USB_REQTYPE_DIR_TO_HOST   1
 
#define USB_REQTYPE_TYPE_STANDARD   0
 USB Setup packet RequestType Type values (from Table 9-2)
 
#define USB_REQTYPE_TYPE_CLASS   1
 
#define USB_REQTYPE_TYPE_VENDOR   2
 
#define USB_REQTYPE_TYPE_RESERVED   3
 
#define USB_REQTYPE_RECIPIENT_DEVICE   0
 USB Setup packet RequestType Recipient values (from Table 9-2)
 
#define USB_REQTYPE_RECIPIENT_INTERFACE   1
 
#define USB_REQTYPE_RECIPIENT_ENDPOINT   2
 
#define USB_REQTYPE_RECIPIENT_OTHER   3
 
#define USB_REQTYPE_GET_DIR(bmRequestType)   (((bmRequestType) >> 7) & 0x01U)
 Get data transfer direction from bmRequestType.
 
#define USB_REQTYPE_GET_TYPE(bmRequestType)   (((bmRequestType) >> 5) & 0x03U)
 Get request type from bmRequestType.
 
#define USB_REQTYPE_GET_RECIPIENT(bmRequestType)   ((bmRequestType) & 0x1FU)
 Get request recipient from bmRequestType.
 
#define USB_SREQ_GET_STATUS   0x00
 USB Standard Request Codes defined in spec.
 
#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
 
#define USB_DESC_DEVICE   1
 Descriptor Types defined in spec.
 
#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
 
#define USB_DESC_OTG   9
 Additional Descriptor Types defined in USB 3 spec.
 
#define USB_DESC_DEBUG   10
 
#define USB_DESC_INTERFACE_ASSOC   11
 
#define USB_DESC_BOS   15
 
#define USB_DESC_DEVICE_CAPABILITY   16
 
#define USB_DESC_CS_DEVICE   0x21
 Class-Specific Descriptor Types as defined by USB Common Class Specification.
 
#define USB_DESC_CS_CONFIGURATION   0x22
 
#define USB_DESC_CS_STRING   0x23
 
#define USB_DESC_CS_INTERFACE   0x24
 
#define USB_DESC_CS_ENDPOINT   0x25
 
#define USB_SFS_ENDPOINT_HALT   0x00
 USB Standard Feature Selectors defined in spec.
 
#define USB_SFS_REMOTE_WAKEUP   0x01
 
#define USB_SFS_TEST_MODE   0x02
 
#define USB_GET_STATUS_SELF_POWERED   BIT(0)
 Bits used for GetStatus response defined in spec.
 
#define USB_GET_STATUS_REMOTE_WAKEUP   BIT(1)
 
#define USB_SCD_RESERVED   BIT(7)
 USB Standard Configuration Descriptor Characteristics from Table 9-10.
 
#define USB_SCD_SELF_POWERED   BIT(6)
 
#define USB_SCD_REMOTE_WAKEUP   BIT(5)
 
#define USB_BCC_AUDIO   0x01
 USB Defined Base Class Codes from https://www.usb.org/defined-class-codes.
 
#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
 
#define USB_SRN_1_1   0x0110
 USB Specification Release Numbers (bcdUSB Descriptor field)
 
#define USB_SRN_2_0   0x0200
 
#define USB_SRN_2_0_1   0x0201
 
#define USB_SRN_2_1   0x0210
 
#define USB_DEC_TO_BCD(dec)   ((((dec) / 10) << 4) | ((dec) % 10))
 
#define USB_BCD_DRN
 USB Device release number (bcdDevice Descriptor field)
 
#define USB_GET_DESCRIPTOR_TYPE(wValue)   ((uint8_t)((wValue) >> 8))
 Macro to obtain descriptor type from USB_SREQ_GET_DESCRIPTOR request.
 
#define USB_GET_DESCRIPTOR_INDEX(wValue)   ((uint8_t)(wValue))
 Macro to obtain descriptor index from USB_SREQ_GET_DESCRIPTOR request.
 
#define USB_CONTROL_EP_MPS   64U
 USB Control Endpoints maximum packet size (MPS)
 
#define USB_EP_DIR_MASK   (uint8_t)BIT(7)
 USB endpoint direction mask.
 
#define USB_EP_DIR_IN   (uint8_t)BIT(7)
 USB IN endpoint direction.
 
#define USB_EP_DIR_OUT   0U
 USB OUT endpoint direction.
 
#define USB_EP_GET_IDX(ep)   ((ep) & ~USB_EP_DIR_MASK)
 Get endpoint index (number) from endpoint address.
 
#define USB_EP_GET_DIR(ep)   ((ep) & USB_EP_DIR_MASK)
 Get direction based on endpoint address.
 
#define USB_EP_GET_ADDR(idx, dir)   ((idx) | ((dir) & USB_EP_DIR_MASK))
 Get endpoint address from endpoint index and direction.
 
#define USB_EP_DIR_IS_IN(ep)   (USB_EP_GET_DIR(ep) == USB_EP_DIR_IN)
 True if the endpoint is an IN endpoint.
 
#define USB_EP_DIR_IS_OUT(ep)   (USB_EP_GET_DIR(ep) == USB_EP_DIR_OUT)
 True if the endpoint is an OUT endpoint.
 
#define USB_CONTROL_EP_OUT   (USB_EP_DIR_OUT | 0U)
 USB Control Endpoints OUT address.
 
#define USB_CONTROL_EP_IN   (USB_EP_DIR_IN | 0U)
 USB Control Endpoints IN address.
 
#define USB_EP_TRANSFER_TYPE_MASK   0x3U
 USB endpoint transfer type mask.
 
#define USB_EP_TYPE_CONTROL   0U
 USB endpoint transfer type control.
 
#define USB_EP_TYPE_ISO   1U
 USB endpoint transfer type isochronous.
 
#define USB_EP_TYPE_BULK   2U
 USB endpoint transfer type bulk.
 
#define USB_EP_TYPE_INTERRUPT   3U
 USB endpoint transfer type interrupt.
 
#define USB_FS_INT_EP_INTERVAL(us)   CLAMP(((us) / 1000U), 1U, 255U)
 Calculate full speed interrupt endpoint bInterval from a value in microseconds.
 
#define USB_HS_INT_EP_INTERVAL(us)   CLAMP((ilog2((us) / 125U) + 1U), 1U, 16U)
 Calculate high speed interrupt endpoint bInterval from a value in microseconds.
 
#define USB_FS_ISO_EP_INTERVAL(us)   CLAMP(((us) / 1000U), 1U, 16U)
 Calculate high speed isochronous endpoint bInterval from a value in microseconds.
 
#define USB_HS_ISO_EP_INTERVAL(us)   CLAMP((ilog2((us) / 125U) + 1U), 1U, 16U)
 Calculate high speed isochronous endpoint bInterval from a value in microseconds.
 
#define USB_MPS_EP_SIZE(mps)   ((mps) & BIT_MASK(11))
 Get endpoint size field from Max Packet Size value.
 
#define USB_MPS_ADDITIONAL_TRANSACTIONS(mps)   (((mps) & 0x1800) >> 11)
 Get number of additional transactions per microframe from Max Packet Size value.
 
#define USB_MPS_TO_TPL(mps)    ((1 + USB_MPS_ADDITIONAL_TRANSACTIONS(mps)) * USB_MPS_EP_SIZE(mps))
 Calculate total payload length from Max Packet Size value.
 
#define USB_TPL_TO_MPS(tpl)
 Calculate Max Packet Size value from total payload length.
 
#define USB_TPL_ROUND_UP(tpl)
 Round up total payload length to next valid value.
 
#define USB_TPL_IS_VALID(tpl)
 Determine whether total payload length value is valid according to USB 2.0.
 

Functions

static bool usb_reqtype_is_to_host (const struct usb_setup_packet *setup)
 Check if request transfer direction is to host.
 
static bool usb_reqtype_is_to_device (const struct usb_setup_packet *setup)
 Check if request transfer direction is to device.
 

Detailed Description

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.

Macro Definition Documentation

◆ USB_BCC_APPLICATION

#define USB_BCC_APPLICATION   0xFE

◆ USB_BCC_AUDIO

#define USB_BCC_AUDIO   0x01

USB Defined Base Class Codes from https://www.usb.org/defined-class-codes.

◆ USB_BCC_CDC_CONTROL

#define USB_BCC_CDC_CONTROL   0x02

◆ USB_BCC_CDC_DATA

#define USB_BCC_CDC_DATA   0x0A

◆ USB_BCC_HID

#define USB_BCC_HID   0x03

◆ USB_BCC_MASS_STORAGE

#define USB_BCC_MASS_STORAGE   0x08

◆ USB_BCC_MISCELLANEOUS

#define USB_BCC_MISCELLANEOUS   0xEF

◆ USB_BCC_VENDOR

#define USB_BCC_VENDOR   0xFF

◆ USB_BCC_VIDEO

#define USB_BCC_VIDEO   0x0E

◆ USB_BCC_WIRELESS_CONTROLLER

#define USB_BCC_WIRELESS_CONTROLLER   0xE0

◆ USB_BCD_DRN

#define USB_BCD_DRN
Value:
(USB_DEC_TO_BCD(KERNEL_VERSION_MAJOR) << 8 | \
USB_DEC_TO_BCD(KERNEL_VERSION_MINOR))
USB_DEC_TO_BCD
#define USB_DEC_TO_BCD(dec)
Definition usb_ch9.h:274

USB Device release number (bcdDevice Descriptor field)

◆ USB_CONTROL_EP_IN

#define USB_CONTROL_EP_IN   (USB_EP_DIR_IN | 0U)

USB Control Endpoints IN address.

◆ USB_CONTROL_EP_MPS

#define USB_CONTROL_EP_MPS   64U

USB Control Endpoints maximum packet size (MPS)

This value may not be correct for devices operating at speeds other than high speed.

◆ USB_CONTROL_EP_OUT

#define USB_CONTROL_EP_OUT   (USB_EP_DIR_OUT | 0U)

USB Control Endpoints OUT address.

◆ USB_DEC_TO_BCD

#define USB_DEC_TO_BCD (   dec)    ((((dec) / 10) << 4) | ((dec) % 10))

◆ USB_DESC_BOS

#define USB_DESC_BOS   15

◆ USB_DESC_CONFIGURATION

#define USB_DESC_CONFIGURATION   2

◆ USB_DESC_CS_CONFIGURATION

#define USB_DESC_CS_CONFIGURATION   0x22

◆ USB_DESC_CS_DEVICE

#define USB_DESC_CS_DEVICE   0x21

Class-Specific Descriptor Types as defined by USB Common Class Specification.

◆ USB_DESC_CS_ENDPOINT

#define USB_DESC_CS_ENDPOINT   0x25

◆ USB_DESC_CS_INTERFACE

#define USB_DESC_CS_INTERFACE   0x24

◆ USB_DESC_CS_STRING

#define USB_DESC_CS_STRING   0x23

◆ USB_DESC_DEBUG

#define USB_DESC_DEBUG   10

◆ USB_DESC_DEVICE

#define USB_DESC_DEVICE   1

Descriptor Types defined in spec.

Table 9-5

◆ USB_DESC_DEVICE_CAPABILITY

#define USB_DESC_DEVICE_CAPABILITY   16

◆ USB_DESC_DEVICE_QUALIFIER

#define USB_DESC_DEVICE_QUALIFIER   6

◆ USB_DESC_ENDPOINT

#define USB_DESC_ENDPOINT   5

◆ USB_DESC_INTERFACE

#define USB_DESC_INTERFACE   4

◆ USB_DESC_INTERFACE_ASSOC

#define USB_DESC_INTERFACE_ASSOC   11

◆ USB_DESC_INTERFACE_POWER

#define USB_DESC_INTERFACE_POWER   8

◆ USB_DESC_OTG

#define USB_DESC_OTG   9

Additional Descriptor Types defined in USB 3 spec.

Table 9-5

◆ USB_DESC_OTHER_SPEED

#define USB_DESC_OTHER_SPEED   7

◆ USB_DESC_STRING

#define USB_DESC_STRING   3

◆ USB_EP_DIR_IN

#define USB_EP_DIR_IN   (uint8_t)BIT(7)

USB IN endpoint direction.

◆ USB_EP_DIR_IS_IN

#define USB_EP_DIR_IS_IN (   ep)    (USB_EP_GET_DIR(ep) == USB_EP_DIR_IN)

True if the endpoint is an IN endpoint.

◆ USB_EP_DIR_IS_OUT

#define USB_EP_DIR_IS_OUT (   ep)    (USB_EP_GET_DIR(ep) == USB_EP_DIR_OUT)

True if the endpoint is an OUT endpoint.

◆ USB_EP_DIR_MASK

#define USB_EP_DIR_MASK   (uint8_t)BIT(7)

USB endpoint direction mask.

◆ USB_EP_DIR_OUT

#define USB_EP_DIR_OUT   0U

USB OUT endpoint direction.

◆ USB_EP_GET_ADDR

#define USB_EP_GET_ADDR (   idx,
  dir 
)    ((idx) | ((dir) & USB_EP_DIR_MASK))

Get endpoint address from endpoint index and direction.

◆ USB_EP_GET_DIR

#define USB_EP_GET_DIR (   ep)    ((ep) & USB_EP_DIR_MASK)

Get direction based on endpoint address.

◆ USB_EP_GET_IDX

#define USB_EP_GET_IDX (   ep)    ((ep) & ~USB_EP_DIR_MASK)

Get endpoint index (number) from endpoint address.

◆ USB_EP_TRANSFER_TYPE_MASK

#define USB_EP_TRANSFER_TYPE_MASK   0x3U

USB endpoint transfer type mask.

◆ USB_EP_TYPE_BULK

#define USB_EP_TYPE_BULK   2U

USB endpoint transfer type bulk.

◆ USB_EP_TYPE_CONTROL

#define USB_EP_TYPE_CONTROL   0U

USB endpoint transfer type control.

◆ USB_EP_TYPE_INTERRUPT

#define USB_EP_TYPE_INTERRUPT   3U

USB endpoint transfer type interrupt.

◆ USB_EP_TYPE_ISO

#define USB_EP_TYPE_ISO   1U

USB endpoint transfer type isochronous.

◆ USB_FS_INT_EP_INTERVAL

#define USB_FS_INT_EP_INTERVAL (   us)    CLAMP(((us) / 1000U), 1U, 255U)

Calculate full speed interrupt endpoint bInterval from a value in microseconds.

◆ USB_FS_ISO_EP_INTERVAL

#define USB_FS_ISO_EP_INTERVAL (   us)    CLAMP(((us) / 1000U), 1U, 16U)

Calculate high speed isochronous endpoint bInterval from a value in microseconds.

◆ USB_GET_DESCRIPTOR_INDEX

#define USB_GET_DESCRIPTOR_INDEX (   wValue)    ((uint8_t)(wValue))

Macro to obtain descriptor index from USB_SREQ_GET_DESCRIPTOR request.

◆ USB_GET_DESCRIPTOR_TYPE

#define USB_GET_DESCRIPTOR_TYPE (   wValue)    ((uint8_t)((wValue) >> 8))

Macro to obtain descriptor type from USB_SREQ_GET_DESCRIPTOR request.

◆ USB_GET_STATUS_REMOTE_WAKEUP

#define USB_GET_STATUS_REMOTE_WAKEUP   BIT(1)

◆ USB_GET_STATUS_SELF_POWERED

#define USB_GET_STATUS_SELF_POWERED   BIT(0)

Bits used for GetStatus response defined in spec.

Figure 9-4

◆ USB_HS_INT_EP_INTERVAL

#define USB_HS_INT_EP_INTERVAL (   us)    CLAMP((ilog2((us) / 125U) + 1U), 1U, 16U)

Calculate high speed interrupt endpoint bInterval from a value in microseconds.

◆ USB_HS_ISO_EP_INTERVAL

#define USB_HS_ISO_EP_INTERVAL (   us)    CLAMP((ilog2((us) / 125U) + 1U), 1U, 16U)

Calculate high speed isochronous endpoint bInterval from a value in microseconds.

◆ USB_MPS_ADDITIONAL_TRANSACTIONS

#define USB_MPS_ADDITIONAL_TRANSACTIONS (   mps)    (((mps) & 0x1800) >> 11)

Get number of additional transactions per microframe from Max Packet Size value.

◆ USB_MPS_EP_SIZE

#define USB_MPS_EP_SIZE (   mps)    ((mps) & BIT_MASK(11))

Get endpoint size field from Max Packet Size value.

◆ USB_MPS_TO_TPL

#define USB_MPS_TO_TPL (   mps)     ((1 + USB_MPS_ADDITIONAL_TRANSACTIONS(mps)) * USB_MPS_EP_SIZE(mps))

Calculate total payload length from Max Packet Size value.

◆ USB_REQTYPE_DIR_TO_DEVICE

#define USB_REQTYPE_DIR_TO_DEVICE   0

USB Setup packet RequestType Direction values (from Table 9-2)

◆ USB_REQTYPE_DIR_TO_HOST

#define USB_REQTYPE_DIR_TO_HOST   1

◆ USB_REQTYPE_GET_DIR

#define USB_REQTYPE_GET_DIR (   bmRequestType)    (((bmRequestType) >> 7) & 0x01U)

Get data transfer direction from bmRequestType.

◆ USB_REQTYPE_GET_RECIPIENT

#define USB_REQTYPE_GET_RECIPIENT (   bmRequestType)    ((bmRequestType) & 0x1FU)

Get request recipient from bmRequestType.

◆ USB_REQTYPE_GET_TYPE

#define USB_REQTYPE_GET_TYPE (   bmRequestType)    (((bmRequestType) >> 5) & 0x03U)

Get request type from bmRequestType.

◆ USB_REQTYPE_RECIPIENT_DEVICE

#define USB_REQTYPE_RECIPIENT_DEVICE   0

USB Setup packet RequestType Recipient values (from Table 9-2)

◆ USB_REQTYPE_RECIPIENT_ENDPOINT

#define USB_REQTYPE_RECIPIENT_ENDPOINT   2

◆ USB_REQTYPE_RECIPIENT_INTERFACE

#define USB_REQTYPE_RECIPIENT_INTERFACE   1

◆ USB_REQTYPE_RECIPIENT_OTHER

#define USB_REQTYPE_RECIPIENT_OTHER   3

◆ USB_REQTYPE_TYPE_CLASS

#define USB_REQTYPE_TYPE_CLASS   1

◆ USB_REQTYPE_TYPE_RESERVED

#define USB_REQTYPE_TYPE_RESERVED   3

◆ USB_REQTYPE_TYPE_STANDARD

#define USB_REQTYPE_TYPE_STANDARD   0

USB Setup packet RequestType Type values (from Table 9-2)

◆ USB_REQTYPE_TYPE_VENDOR

#define USB_REQTYPE_TYPE_VENDOR   2

◆ USB_SCD_REMOTE_WAKEUP

#define USB_SCD_REMOTE_WAKEUP   BIT(5)

◆ USB_SCD_RESERVED

#define USB_SCD_RESERVED   BIT(7)

USB Standard Configuration Descriptor Characteristics from Table 9-10.

◆ USB_SCD_SELF_POWERED

#define USB_SCD_SELF_POWERED   BIT(6)

◆ USB_SFS_ENDPOINT_HALT

#define USB_SFS_ENDPOINT_HALT   0x00

USB Standard Feature Selectors defined in spec.

Table 9-6

◆ USB_SFS_REMOTE_WAKEUP

#define USB_SFS_REMOTE_WAKEUP   0x01

◆ USB_SFS_TEST_MODE

#define USB_SFS_TEST_MODE   0x02

◆ USB_SREQ_CLEAR_FEATURE

#define USB_SREQ_CLEAR_FEATURE   0x01

◆ USB_SREQ_GET_CONFIGURATION

#define USB_SREQ_GET_CONFIGURATION   0x08

◆ USB_SREQ_GET_DESCRIPTOR

#define USB_SREQ_GET_DESCRIPTOR   0x06

◆ USB_SREQ_GET_INTERFACE

#define USB_SREQ_GET_INTERFACE   0x0A

◆ USB_SREQ_GET_STATUS

#define USB_SREQ_GET_STATUS   0x00

USB Standard Request Codes defined in spec.

Table 9-4

◆ USB_SREQ_SET_ADDRESS

#define USB_SREQ_SET_ADDRESS   0x05

◆ USB_SREQ_SET_CONFIGURATION

#define USB_SREQ_SET_CONFIGURATION   0x09

◆ USB_SREQ_SET_DESCRIPTOR

#define USB_SREQ_SET_DESCRIPTOR   0x07

◆ USB_SREQ_SET_FEATURE

#define USB_SREQ_SET_FEATURE   0x03

◆ USB_SREQ_SET_INTERFACE

#define USB_SREQ_SET_INTERFACE   0x0B

◆ USB_SREQ_SYNCH_FRAME

#define USB_SREQ_SYNCH_FRAME   0x0C

◆ USB_SRN_1_1

#define USB_SRN_1_1   0x0110

USB Specification Release Numbers (bcdUSB Descriptor field)

◆ USB_SRN_2_0

#define USB_SRN_2_0   0x0200

◆ USB_SRN_2_0_1

#define USB_SRN_2_0_1   0x0201

◆ USB_SRN_2_1

#define USB_SRN_2_1   0x0210

◆ USB_TPL_IS_VALID

#define USB_TPL_IS_VALID (   tpl)
Value:
(((tpl) > 3072) ? false : \
((tpl) > 2048) ? ((tpl) % 3 == 0) : \
((tpl) > 1024) ? ((tpl) % 2 == 0) : \
((tpl) >= 0))
false
#define false
Definition stdbool.h:15

Determine whether total payload length value is valid according to USB 2.0.

◆ USB_TPL_ROUND_UP

#define USB_TPL_ROUND_UP (   tpl)
Value:
(((tpl) > 2048) ? ROUND_UP(tpl, 3) : \
((tpl) > 1024) ? ROUND_UP(tpl, 2) : \
(tpl))
ROUND_UP
#define ROUND_UP(x, align)
Value of x rounded up to the next multiple of align.
Definition util.h:322

Round up total payload length to next valid value.

◆ USB_TPL_TO_MPS

#define USB_TPL_TO_MPS (   tpl)
Value:
(((tpl) > 2048) ? ((2 << 11) | ((tpl) / 3)) : \
((tpl) > 1024) ? ((1 << 11) | ((tpl) / 2)) : \
(tpl))

Calculate Max Packet Size value from total payload length.

Function Documentation

◆ usb_reqtype_is_to_device()

static bool usb_reqtype_is_to_device ( const struct usb_setup_packet *  setup)
inlinestatic

Check if request transfer direction is to device.

Parameters
setupPointer to USB Setup packet
Returns
true If transfer direction is to device

◆ usb_reqtype_is_to_host()

static bool usb_reqtype_is_to_host ( const struct usb_setup_packet *  setup)
inlinestatic

Check if request transfer direction is to host.

Parameters
setupPointer to USB Setup packet
Returns
true If transfer direction is to host