610 lines
23 KiB
C
610 lines
23 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file usb.h
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* @brief USB Driver macros and structures.
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*
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* @addtogroup USB
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* @{
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*/
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#ifndef _USB_H_
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#define _USB_H_
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#if HAL_USE_USB || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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#define USB_RTYPE_DIR_MASK 0x80
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#define USB_RTYPE_DIR_HOST2DEV 0x00
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#define USB_RTYPE_DIR_DEV2HOST 0x80
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#define USB_RTYPE_TYPE_MASK 0x60
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#define USB_RTYPE_TYPE_STD 0x00
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#define USB_RTYPE_TYPE_CLASS 0x20
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#define USB_RTYPE_TYPE_VENDOR 0x40
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#define USB_RTYPE_TYPE_RESERVED 0x60
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#define USB_RTYPE_RECIPIENT_MASK 0x1F
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#define USB_RTYPE_RECIPIENT_DEVICE 0x00
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#define USB_RTYPE_RECIPIENT_INTERFACE 0x01
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#define USB_RTYPE_RECIPIENT_ENDPOINT 0x02
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#define USB_RTYPE_RECIPIENT_OTHER 0x03
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#define USB_REQ_GET_STATUS 0
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#define USB_REQ_CLEAR_FEATURE 1
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#define USB_REQ_SET_FEATURE 3
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#define USB_REQ_SET_ADDRESS 5
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#define USB_REQ_GET_DESCRIPTOR 6
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#define USB_REQ_SET_DESCRIPTOR 7
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#define USB_REQ_GET_CONFIGURATION 8
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#define USB_REQ_SET_CONFIGURATION 9
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#define USB_REQ_GET_INTERFACE 10
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#define USB_REQ_SET_INTERFACE 11
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#define USB_REQ_SYNCH_FRAME 12
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#define USB_DESCRIPTOR_DEVICE 1
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#define USB_DESCRIPTOR_CONFIGURATION 2
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#define USB_DESCRIPTOR_STRING 3
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#define USB_DESCRIPTOR_INTERFACE 4
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#define USB_DESCRIPTOR_ENDPOINT 5
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#define USB_DESCRIPTOR_DEVICE_QUALIFIER 6
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#define USB_DESCRIPTOR_OTHER_SPEED_CFG 7
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#define USB_DESCRIPTOR_INTERFACE_POWER 8
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#define USB_FEATURE_ENDPOINT_HALT 0
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#define USB_FEATURE_DEVICE_REMOTE_WAKEUP 1
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#define USB_FEATURE_TEST_MODE 2
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#define USB_EARLY_SET_ADDRESS 0
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#define USB_LATE_SET_ADDRESS 1
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/**
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* @name Helper macros for USB descriptors
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* @{
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*/
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/**
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* @brief Helper macro for index values into descriptor strings.
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*/
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#define USB_DESC_INDEX(i) ((uint8_t)(i))
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/**
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* @brief Helper macro for byte values into descriptor strings.
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*/
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#define USB_DESC_BYTE(b) ((uint8_t)(b))
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/**
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* @brief Helper macro for word values into descriptor strings.
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*/
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#define USB_DESC_WORD(w) \
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(uint8_t)((w) & 255), \
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(uint8_t)(((w) >> 8) & 255)
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/**
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* @brief Helper macro for BCD values into descriptor strings.
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*/
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#define USB_DESC_BCD(bcd) \
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(uint8_t)((bcd) & 255), \
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(uint8_t)(((bcd) >> 8) & 255)
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/**
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* @brief Device Descriptor helper macro.
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*/
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#define USB_DESC_DEVICE(bcdUSB, bDeviceClass, bDeviceSubClass, \
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bDeviceProtocol, bMaxPacketSize, idVendor, \
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idProduct, bcdDevice, iManufacturer, \
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iProduct, iSerialNumber, bNumConfigurations) \
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USB_DESC_BYTE(18), \
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USB_DESC_BYTE(USB_DESCRIPTOR_DEVICE), \
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USB_DESC_BCD(bcdUSB), \
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USB_DESC_BYTE(bDeviceClass), \
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USB_DESC_BYTE(bDeviceSubClass), \
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USB_DESC_BYTE(bDeviceProtocol), \
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USB_DESC_BYTE(bMaxPacketSize), \
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USB_DESC_WORD(idVendor), \
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USB_DESC_WORD(idProduct), \
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USB_DESC_BCD(bcdDevice), \
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USB_DESC_INDEX(iManufacturer), \
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USB_DESC_INDEX(iProduct), \
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USB_DESC_INDEX(iSerialNumber), \
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USB_DESC_BYTE(bNumConfigurations)
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/**
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* @brief Configuration Descriptor helper macro.
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*/
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#define USB_DESC_CONFIGURATION(wTotalLength, bNumInterfaces, \
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bConfigurationValue, iConfiguration, \
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bmAttributes, bMaxPower) \
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USB_DESC_BYTE(9), \
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USB_DESC_BYTE(USB_DESCRIPTOR_CONFIGURATION), \
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USB_DESC_WORD(wTotalLength), \
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USB_DESC_BYTE(bNumInterfaces), \
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USB_DESC_BYTE(bConfigurationValue), \
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USB_DESC_INDEX(iConfiguration), \
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USB_DESC_BYTE(bmAttributes), \
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USB_DESC_BYTE(bMaxPower)
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/**
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* @brief Interface Descriptor helper macro.
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*/
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#define USB_DESC_INTERFACE(bInterfaceNumber, bAlternateSetting, \
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bNumEndpoints, bInterfaceClass, \
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bInterfaceSubClass, bInterfaceProtocol, \
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iInterface) \
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USB_DESC_BYTE(9), \
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USB_DESC_BYTE(USB_DESCRIPTOR_INTERFACE), \
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USB_DESC_BYTE(bInterfaceNumber), \
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USB_DESC_BYTE(bAlternateSetting), \
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USB_DESC_BYTE(bNumEndpoints), \
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USB_DESC_BYTE(bInterfaceClass), \
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USB_DESC_BYTE(bInterfaceSubClass), \
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USB_DESC_BYTE(bInterfaceProtocol), \
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USB_DESC_INDEX(iInterface)
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/**
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* @brief Endpoint Descriptor helper macro.
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*/
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#define USB_DESC_ENDPOINT(bEndpointAddress, bmAttributes, wMaxPacketSize, \
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bInterval) \
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USB_DESC_BYTE(7), \
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USB_DESC_BYTE(USB_DESCRIPTOR_ENDPOINT), \
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USB_DESC_BYTE(bEndpointAddress), \
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USB_DESC_BYTE(bmAttributes), \
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USB_DESC_WORD(wMaxPacketSize), \
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USB_DESC_BYTE(bInterval)
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/** @} */
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/**
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* @name Endpoint types and settings
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* @{
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*/
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#define USB_EP_MODE_TYPE 0x0003 /**< Endpoint type mask. */
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#define USB_EP_MODE_TYPE_CTRL 0x0000 /**< Control endpoint. */
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#define USB_EP_MODE_TYPE_ISOC 0x0001 /**< Isochronous endpoint. */
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#define USB_EP_MODE_TYPE_BULK 0x0002 /**< Bulk endpoint. */
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#define USB_EP_MODE_TYPE_INTR 0x0003 /**< Interrupt endpoint. */
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#define USB_EP_MODE_LINEAR_BUFFER 0x0000 /**< Linear buffer mode. */
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#define USB_EP_MODE_QUEUE_BUFFER 0x0010 /**< Queue buffer mode. */
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/** @} */
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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Type of a structure representing an USB driver.
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*/
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typedef struct USBDriver USBDriver;
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/**
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* @brief Type of an endpoint identifier.
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*/
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typedef uint8_t usbep_t;
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/**
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* @brief Type of a driver state machine possible states.
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*/
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typedef enum {
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USB_UNINIT = 0, /**< Not initialized. */
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USB_STOP = 1, /**< Stopped. */
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USB_READY = 2, /**< Ready, after bus reset. */
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USB_SELECTED = 3, /**< Address assigned. */
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USB_ACTIVE = 4, /**< Active, configuration selected.*/
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} usbstate_t;
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/**
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* @brief Type of an endpoint status.
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*/
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typedef enum {
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EP_STATUS_DISABLED = 0, /**< Endpoint not active. */
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EP_STATUS_STALLED = 1, /**< Endpoint opened but stalled. */
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EP_STATUS_ACTIVE = 2 /**< Active endpoint. */
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} usbepstatus_t;
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/**
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* @brief Type of an endpoint zero state machine states.
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*/
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typedef enum {
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USB_EP0_WAITING_SETUP, /**< Waiting for SETUP data. */
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USB_EP0_TX, /**< Trasmitting. */
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USB_EP0_WAITING_STS, /**< Waiting status. */
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USB_EP0_RX, /**< Receiving. */
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USB_EP0_SENDING_STS, /**< Sending status. */
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USB_EP0_ERROR /**< Error, EP0 stalled. */
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} usbep0state_t;
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/**
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* @brief Type of an enumeration of the possible USB events.
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*/
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typedef enum {
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USB_EVENT_RESET = 0, /**< Driver has been reset by host. */
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USB_EVENT_ADDRESS = 1, /**< Address assigned. */
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USB_EVENT_CONFIGURED = 2, /**< Configuration selected. */
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USB_EVENT_SUSPEND = 3, /**< Entering suspend mode. */
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USB_EVENT_WAKEUP = 4, /**< Leaving suspend mode. */
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USB_EVENT_STALLED = 5, /**< Endpoint 0 error, stalled. */
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} usbevent_t;
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/**
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* @brief Type of an USB descriptor.
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*/
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typedef struct {
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/**
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* @brief Descriptor size in unicode characters.
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*/
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size_t ud_size;
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/**
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* @brief Pointer to the descriptor.
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*/
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const uint8_t *ud_string;
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} USBDescriptor;
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/**
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* @brief Type of an USB generic notification callback.
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*
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* @param[in] usbp pointer to the @p USBDriver object triggering the
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* callback
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*/
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typedef void (*usbcallback_t)(USBDriver *usbp);
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/**
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* @brief Type of an USB endpoint callback.
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*
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* @param[in] usbp pointer to the @p USBDriver object triggering the
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* callback
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* @param[in] ep endpoint number
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*/
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typedef void (*usbepcallback_t)(USBDriver *usbp, usbep_t ep);
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/**
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* @brief Type of an USB event notification callback.
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*
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* @param[in] usbp pointer to the @p USBDriver object triggering the
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* callback
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* @param[in] event event type
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*/
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typedef void (*usbeventcb_t)(USBDriver *usbp, usbevent_t event);
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/**
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* @brief Type of a requests handler callback.
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* @details The request is encoded in the @p usb_setup buffer.
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*
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* @param[in] usbp pointer to the @p USBDriver object triggering the
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* callback
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* @return The request handling exit code.
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* @retval FALSE Request not recognized by the handler.
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* @retval TRUE Request handled.
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*/
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typedef bool_t (*usbreqhandler_t)(USBDriver *usbp);
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/**
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* @brief Type of an USB descriptor-retrieving callback.
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*/
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typedef const USBDescriptor * (*usbgetdescriptor_t)(USBDriver *usbp,
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uint8_t dtype,
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uint8_t dindex,
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uint16_t lang);
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#include "usb_lld.h"
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @name Macro Functions
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* @{
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*/
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/**
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* @brief Connects the USB device.
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*
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* @api
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*/
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#define usbConnectBus(usbp) usb_lld_connect_bus(usbp)
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/**
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* @brief Disconnect the USB device.
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*
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* @api
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*/
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#define usbDisconnectBus(usbp) usb_lld_disconnect_bus(usbp)
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/**
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* @brief Returns the current frame number.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @return The current frame number.
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*
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* @api
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*/
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#define usbGetFrameNumber(usbp) usb_lld_get_frame_number(usbp)
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/**
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* @brief Returns the status of an IN endpoint.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @return The operation status.
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* @retval FALSE Endpoint ready.
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* @retval TRUE Endpoint transmitting.
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*
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* @iclass
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*/
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#define usbGetTransmitStatusI(usbp, ep) ((usbp)->transmitting & (1 << (ep)))
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/**
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* @brief Returns the status of an OUT endpoint.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @return The operation status.
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* @retval FALSE Endpoint ready.
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* @retval TRUE Endpoint receiving.
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*
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* @iclass
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*/
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#define usbGetReceiveStatusI(usbp, ep) ((usbp)->receiving & (1 << (ep)))
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/**
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* @brief Prepares for a receive transaction on an OUT endpoint.
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* @pre In order to use this function the endpoint must have been
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* initialized in transaction mode.
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* @post The endpoint is ready for @p usbStartReceiveI().
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[out] buf buffer where to copy the received data
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* @param[in] n maximum number of bytes to copy
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*
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* @special
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*/
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#define usbPrepareReceive(usbp, ep, buf, n) \
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usb_lld_prepare_receive(usbp, ep, buf, n)
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/**
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* @brief Prepares for a transmit transaction on an IN endpoint.
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* @pre In order to use this function the endpoint must have been
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* initialized in transaction mode.
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* @post The endpoint is ready for @p usbStartTransmitI().
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[in] buf buffer where to fetch the data to be transmitted
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* @param[in] n maximum number of bytes to copy
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*
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* @special
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*/
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#define usbPrepareTransmit(usbp, ep, buf, n) \
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usb_lld_prepare_transmit(usbp, ep, buf, n)
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/**
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* @brief Prepares for a receive transaction on an OUT endpoint.
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* @pre In order to use this function the endpoint must have been
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* initialized in transaction mode.
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* @post The endpoint is ready for @p usbStartReceiveI().
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* @note The receive transaction size is equal to the space in the queue
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* rounded to the lower multiple of a packet size. So make sure there
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* is room for at least one packet in the queue before starting
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* the receive operation.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[in] iq input queue to be filled with incoming data
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* @param[in] n maximum number of bytes to copy
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*
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* @special
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*/
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#define usbPrepareQueuedReceive(usbp, ep, iq, n) \
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usb_lld_prepare_queued_receive(usbp, ep, iq, n)
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/**
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* @brief Prepares for a transmit transaction on an IN endpoint.
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* @pre In order to use this function the endpoint must have been
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* initialized in transaction mode.
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* @post The endpoint is ready for @p usbStartTransmitI().
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* @note The transmit transaction size is equal to the data contained
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* in the queue.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[in] oq output queue to be fetched for outgoing data
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* @param[in] n maximum number of bytes to copy
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*
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* @special
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*/
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#define usbPrepareQueuedTransmit(usbp, ep, oq, n) \
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usb_lld_prepare_queued_transmit(usbp, ep, oq, n)
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/**
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* @brief Returns the exact size of a receive transaction.
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* @details The received size can be different from the size specified in
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* @p usbStartReceiveI() because the last packet could have a size
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* different from the expected one.
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* @pre The OUT endpoint must have been configured in transaction mode
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* in order to use this function.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @return Received data size.
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*
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* @iclass
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*/
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#define usbGetReceiveTransactionSizeI(usbp, ep) \
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usb_lld_get_transaction_size(usbp, ep)
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/**
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* @brief Returns the exact size of a received packet.
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* @pre The OUT endpoint must have been configured in packet mode
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* in order to use this function.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @return Received data size.
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*
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* @iclass
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*/
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#define usbGetReceivePacketSizeI(usbp, ep) \
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usb_lld_get_packet_size(usbp, ep)
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/**
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* @brief Request transfer setup.
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* @details This macro is used by the request handling callbacks in order to
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* prepare a transaction over the endpoint zero.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] buf pointer to a buffer for the transaction data
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* @param[in] n number of bytes to be transferred
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* @param[in] endcb callback to be invoked after the transfer or @p NULL
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*
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* @api
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*/
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#define usbSetupTransfer(usbp, buf, n, endcb) { \
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(usbp)->ep0next = (buf); \
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(usbp)->ep0n = (n); \
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(usbp)->ep0endcb = (endcb); \
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}
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/**
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* @brief Reads a setup packet from the dedicated packet buffer.
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* @details This function must be invoked in the context of the @p setup_cb
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* callback in order to read the received setup packet.
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* @pre In order to use this function the endpoint must have been
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* initialized as a control endpoint.
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* @note This function can be invoked both in thread and IRQ context.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[out] buf buffer where to copy the packet data
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*
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* @special
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*/
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#define usbReadSetup(usbp, ep, buf) usb_lld_read_setup(usbp, ep, buf)
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/** @} */
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/**
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* @name Low Level driver helper macros
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* @{
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*/
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/**
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* @brief Common ISR code, usb event callback.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] evt USB event code
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*
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* @notapi
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*/
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#define _usb_isr_invoke_event_cb(usbp, evt) { \
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if (((usbp)->config->event_cb) != NULL) \
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(usbp)->config->event_cb(usbp, evt); \
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}
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/**
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* @brief Common ISR code, SOF callback.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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*
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* @notapi
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*/
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#define _usb_isr_invoke_sof_cb(usbp) { \
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if (((usbp)->config->sof_cb) != NULL) \
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(usbp)->config->sof_cb(usbp); \
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}
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/**
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* @brief Common ISR code, setup packet callback.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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#define _usb_isr_invoke_setup_cb(usbp, ep) { \
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(usbp)->epc[ep]->setup_cb(usbp, ep); \
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}
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/**
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* @brief Common ISR code, IN endpoint callback.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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#define _usb_isr_invoke_in_cb(usbp, ep) { \
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(usbp)->transmitting &= ~(1 << (ep)); \
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(usbp)->epc[ep]->in_cb(usbp, ep); \
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}
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/**
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* @brief Common ISR code, OUT endpoint event.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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#define _usb_isr_invoke_out_cb(usbp, ep) { \
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(usbp)->receiving &= ~(1 << (ep)); \
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(usbp)->epc[ep]->out_cb(usbp, ep); \
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}
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/** @} */
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void usbInit(void);
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void usbObjectInit(USBDriver *usbp);
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void usbStart(USBDriver *usbp, const USBConfig *config);
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void usbStop(USBDriver *usbp);
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void usbInitEndpointI(USBDriver *usbp, usbep_t ep,
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const USBEndpointConfig *epcp);
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void usbDisableEndpointsI(USBDriver *usbp);
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void usbReadSetupI(USBDriver *usbp, usbep_t ep, uint8_t *buf);
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bool_t usbStartReceiveI(USBDriver *usbp, usbep_t ep);
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bool_t usbStartTransmitI(USBDriver *usbp, usbep_t ep);
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bool_t usbStallReceiveI(USBDriver *usbp, usbep_t ep);
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bool_t usbStallTransmitI(USBDriver *usbp, usbep_t ep);
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void _usb_reset(USBDriver *usbp);
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void _usb_ep0setup(USBDriver *usbp, usbep_t ep);
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void _usb_ep0in(USBDriver *usbp, usbep_t ep);
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void _usb_ep0out(USBDriver *usbp, usbep_t ep);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_USB */
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#endif /* _USB_H_ */
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/** @} */
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