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libopencm3/include/libopencm3/usb/usbstd.h

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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __USBSTD_H
#define __USBSTD_H
#include <stdint.h>
#include <libopencm3/cm3/common.h>
/*
* This file contains structure definitions for the USB control structures
* defined in chapter 9 of the "Univeral Serial Bus Specification Revision 2.0"
* Available from the USB Implementers Forum - http://www.usb.org/
*/
/* USB Setup Data structure - Table 9-2 */
struct usb_setup_data {
u8 bmRequestType;
u8 bRequest;
u16 wValue;
u16 wIndex;
u16 wLength;
} __attribute__((packed));
/* bmRequestType bit definitions */
#define USB_REQ_TYPE_IN 0x80
#define USB_REQ_TYPE_STANDARD 0x00
#define USB_REQ_TYPE_CLASS 0x20
#define USB_REQ_TYPE_VENDOR 0x40
#define USB_REQ_TYPE_DEVICE 0x00
#define USB_REQ_TYPE_INTERFACE 0x01
#define USB_REQ_TYPE_ENDPOINT 0x02
#define USB_REQ_TYPE_DIRECTION 0x80
#define USB_REQ_TYPE_TYPE 0x60
#define USB_REQ_TYPE_RECIPIENT 0x1F
/* USB Standard Request Codes - Table 9-4 */
#define USB_REQ_GET_STATUS 0
#define USB_REQ_CLEAR_FEATURE 1
/* Reserved for future use: 2 */
#define USB_REQ_SET_FEATURE 3
/* Reserved for future use: 3 */
#define USB_REQ_SET_ADDRESS 5
#define USB_REQ_GET_DESCRIPTOR 6
#define USB_REQ_SET_DESCRIPTOR 7
#define USB_REQ_GET_CONFIGURATION 8
#define USB_REQ_SET_CONFIGURATION 9
#define USB_REQ_GET_INTERFACE 10
#define USB_REQ_SET_INTERFACE 11
#define USB_REQ_SET_SYNCH_FRAME 12
/* USB Descriptor Types - Table 9-5 */
#define USB_DT_DEVICE 1
#define USB_DT_CONFIGURATION 2
#define USB_DT_STRING 3
#define USB_DT_INTERFACE 4
#define USB_DT_ENDPOINT 5
#define USB_DT_DEVICE_QUALIFIER 6
#define USB_DT_OTHER_SPEED_CONFIGURATION 7
#define USB_DT_INTERFACE_POWER 8
/* From ECNs */
#define USB_DT_OTG 9
#define USB_DT_DEBUG 10
#define USB_DT_INTERFACE_ASSOCIATION 11
/* USB Standard Feature Selectors - Table 9-6 */
#define USB_FEAT_ENDPOINT_HALT 0
#define USB_FEAT_DEVICE_REMOTE_WAKEUP 1
#define USB_FEAT_TEST_MODE 2
/* Information Returned by a GetStatus() Request to a Device - Figure 9-4 */
#define USB_DEV_STATUS_SELF_POWERED 0x01
#define USB_DEV_STATUS_REMOTE_WAKEUP 0x02
/* USB Standard Device Descriptor - Table 9-8 */
struct usb_device_descriptor {
u8 bLength;
u8 bDescriptorType;
u16 bcdUSB;
u8 bDeviceClass;
u8 bDeviceSubClass;
u8 bDeviceProtocol;
u8 bMaxPacketSize0;
u16 idVendor;
u16 idProduct;
u16 bcdDevice;
u8 iManufacturer;
u8 iProduct;
u8 iSerialNumber;
u8 bNumConfigurations;
} __attribute__((packed));
#define USB_DT_DEVICE_SIZE sizeof(struct usb_device_descriptor)
/* USB Device_Qualifier Descriptor - Table 9-9
* Not used in this implementation.
*/
struct usb_device_qualifier_descriptor {
u8 bLength;
u8 bDescriptorType;
u16 bcdUSB;
u8 bDeviceClass;
u8 bDeviceSubClass;
u8 bDeviceProtocol;
u8 bMaxPacketSize0;
u8 bNumConfigurations;
u8 bReserved;
} __attribute__((packed));
/* USB Standard Configuration Descriptor - Table 9-10 */
struct usb_config_descriptor {
u8 bLength;
u8 bDescriptorType;
u16 wTotalLength;
u8 bNumInterfaces;
u8 bConfigurationValue;
u8 iConfiguration;
u8 bmAttributes;
u8 bMaxPower;
/* Descriptor ends here. The following are used internally: */
const struct usb_interface {
int num_altsetting;
const struct usb_iface_assoc_descriptor *iface_assoc;
const struct usb_interface_descriptor *altsetting;
} *interface;
} __attribute__((packed));
#define USB_DT_CONFIGURATION_SIZE 9
/* USB Configuration Descriptor bmAttributes bit definitions */
#define USB_CONFIG_ATTR_SELF_POWERED 0x40
#define USB_CONFIG_ATTR_REMOTE_WAKEUP 0x20
/* Other Speed Configuration is the same as Configuration Descriptor.
* - Table 9-11
*/
/* USB Standard Interface Descriptor - Table 9-12 */
struct usb_interface_descriptor {
u8 bLength;
u8 bDescriptorType;
u8 bInterfaceNumber;
u8 bAlternateSetting;
u8 bNumEndpoints;
u8 bInterfaceClass;
u8 bInterfaceSubClass;
u8 bInterfaceProtocol;
u8 iInterface;
/* Descriptor ends here. The following are used internally: */
const struct usb_endpoint_descriptor *endpoint;
const void *extra;
int extralen;
} __attribute__((packed));
#define USB_DT_INTERFACE_SIZE 9
/* USB Standard Endpoint Descriptor - Table 9-13 */
struct usb_endpoint_descriptor {
u8 bLength;
u8 bDescriptorType;
u8 bEndpointAddress;
u8 bmAttributes;
u16 wMaxPacketSize;
u8 bInterval;
} __attribute__((packed));
#define USB_DT_ENDPOINT_SIZE sizeof(struct usb_endpoint_descriptor)
/* USB Endpoint Descriptor bmAttributes bit definitions */
#define USB_ENDPOINT_ATTR_CONTROL 0x00
#define USB_ENDPOINT_ATTR_ISOCHRONOUS 0x01
#define USB_ENDPOINT_ATTR_BULK 0x02
#define USB_ENDPOINT_ATTR_INTERRUPT 0x03
#define USB_ENDPOINT_ATTR_NOSYNC 0x00
#define USB_ENDPOINT_ATTR_ASYNC 0x04
#define USB_ENDPOINT_ATTR_ADAPTIVE 0x08
#define USB_ENDPOINT_ATTR_SYNC 0x0C
#define USB_ENDPOINT_ATTR_DATA 0x00
#define USB_ENDPOINT_ATTR_FEEDBACK 0x10
#define USB_ENDPOINT_ATTR_IMPLICIT_FEEDBACK_DATA 0x20
/* Table 9-15 specifies String Descriptor Zero.
* Table 9-16 specified UNICODE String Descriptor.
*/
struct usb_string_descriptor {
u8 bLength;
u8 bDescriptorType;
u16 wData[];
} __attribute__((packed));
/* From ECN: Interface Association Descriptors, Table 9-Z */
struct usb_iface_assoc_descriptor {
u8 bLength;
u8 bDescriptorType;
u8 bFirstInterface;
u8 bInterfaceCount;
u8 bFunctionClass;
u8 bFunctionSubClass;
u8 bFunctionProtocol;
u8 iFunction;
} __attribute__((packed));
#define USB_DT_INTERFACE_ASSOCIATION_SIZE \
sizeof(struct usb_iface_assoc_descriptor)
enum usb_language_id {
USB_LANGID_ENGLISH_US = 0x409,
};
#endif
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