331 lines
9.9 KiB
C
331 lines
9.9 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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 STM32/usb_lld.h
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* @brief STM32 USB subsystem low level driver header.
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*
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* @addtogroup USB
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* @{
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*/
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#ifndef _USB_LLD_H_
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#define _USB_LLD_H_
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#if HAL_USE_USB || defined(__DOXYGEN__)
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#include "stm32_usb.h"
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/*===========================================================================*/
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/* Driver constants. */
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/*===========================================================================*/
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/**
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* @brief Maximum endpoint address.
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*/
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#define USB_MAX_ENDPOINTS USB_ENDOPOINTS_NUMBER
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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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* @brief USB1 driver enable switch.
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* @details If set to @p TRUE the support for USB1 is included.
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* @note The default is @p TRUE.
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*/
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#if !defined(STM32_USB_USE_USB1) || defined(__DOXYGEN__)
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#define STM32_USB_USE_USB1 TRUE
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#endif
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/**
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* @brief USB1 interrupt priority level setting.
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*/
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#if !defined(STM32_USB_USB1_HP_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_USB_USB1_HP_IRQ_PRIORITY 6
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#endif
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/**
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* @brief USB1 interrupt priority level setting.
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*/
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#if !defined(STM32_USB_USB1_LP_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_USB_USB1_LP_IRQ_PRIORITY 14
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#endif
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if STM32_USB_USE_USB1 && !STM32_HAS_USB
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#error "USB not present in the selected device"
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#endif
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#if !STM32_USB_USE_USB1
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#error "USB driver activated but no USB peripheral assigned"
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#endif
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#if STM32_USBCLK != 48000000
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#error "the USB driver requires a 48MHz clock"
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#endif
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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 an USB Endpoint configuration structure.
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* @note Platform specific restrictions may apply to endpoints.
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*/
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typedef struct {
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/**
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* @brief IN endpoint notification callback.
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*/
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usbepcallback_t uepc_in_cb;
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/**
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* @brief OUT endpoint notification callback.
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*/
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usbepcallback_t uepc_out_cb;
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/**
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* @brief IN endpoint maximum packet size.
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*/
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uint16_t uepc_in_maxsize;
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/**
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* @brief OUT endpoint maximum packet size.
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*/
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uint16_t uepc_out_maxsize;
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/* End of the mandatory fields.*/
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/**
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* @brief EPxR register initialization value.
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* @note Do not specify the EA field, leave it to zero.
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*/
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uint16_t uepc_epr;
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/**
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* @brief Endpoint IN buffer address as offset in the PMA.
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*/
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uint16_t uepc_inaddr;
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/**
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* @brief Endpoint OUT buffer address as offset in the PMA.
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*/
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uint16_t uepc_outaddr;
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} USBEndpointConfig;
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/**
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* @brief Type of an endpoint state structure.
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*/
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typedef struct {
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/**
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* @brief Configuration associated to the endpoint.
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*/
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const USBEndpointConfig *uep_config;
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/**
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* @brief Pointer to the transmission buffer.
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*/
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const uint8_t *uep_txbuf;
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/**
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* @brief Pointer to the receive buffer.
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*/
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uint8_t *uep_rxbuf;
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/**
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* @brief Requested transmit transfer size.
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*/
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size_t uep_txsize;
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/**
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* @brief Requested receive transfer size.
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*/
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size_t uep_rxsize;
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/**
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* @brief Transmitted bytes so far.
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*/
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size_t uep_txcnt;
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/**
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* @brief Received bytes so far.
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*/
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size_t uep_rxcnt;
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/**
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* @brief @p TRUE if transmitting else @p FALSE.
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*/
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uint8_t uep_transmitting;
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/**
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* @brief @p TRUE if receiving else @p FALSE.
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*/
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uint8_t uep_receiving;
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} USBEndpointState;
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/**
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* @brief Type of an USB driver configuration structure.
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*/
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typedef struct {
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/**
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* @brief USB events callback.
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* @details This callback is invoked when an USB driver event is registered.
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*/
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usbeventcb_t uc_event_cb;
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/**
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* @brief Device GET_DESCRIPTOR request callback.
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* @note This callback is mandatory and cannot be set to @p NULL.
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*/
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usbgetdescriptor_t uc_get_descriptor_cb;
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/**
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* @brief Requests hook callback.
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* @details This hook allows to be notified of standard requests or to
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* handle non standard requests.
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*/
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usbreqhandler_t uc_requests_hook_cb;
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/**
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* @brief Start Of Frame callback.
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*/
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usbcallback_t uc_sof_cb;
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/* End of the mandatory fields.*/
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} USBConfig;
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/**
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* @brief Structure representing an USB driver.
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*/
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struct USBDriver {
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/**
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* @brief Driver state.
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*/
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usbstate_t usb_state;
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/**
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* @brief Current configuration data.
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*/
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const USBConfig *usb_config;
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/**
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* @brief Field available to user, it can be used to associate an
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* application-defined handler to the USB driver.
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*/
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void *usb_param;
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/**
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* @brief Active endpoints configurations.
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*/
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USBEndpointState *usb_ep[USB_MAX_ENDPOINTS + 1];
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/**
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* @brief Endpoint 0 state.
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*/
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usbep0state_t usb_ep0state;
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/**
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* @brief Next position in the buffer to be transferred through endpoint 0.
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*/
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uint8_t *usb_ep0next;
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/**
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* @brief Maximum number of bytes to be tranferred through endpoint 0.
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*/
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size_t usb_ep0max;
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/**
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* @brief Number of bytes yet to be tranferred through endpoint 0.
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*/
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size_t usb_ep0n;
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/**
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* @brief Size of the last packet transferred through endpoint 0.
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*/
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size_t usb_ep0lastsize;
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/**
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* @brief Endpoint 0 end transaction callback.
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*/
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usbcallback_t usb_ep0endcb;
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/**
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* @brief Setup packet buffer.
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*/
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uint8_t usb_setup[8];
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/**
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* @brief Current USB device status.
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*/
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uint16_t usb_status;
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/**
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* @brief Assigned USB address.
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*/
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uint8_t usb_address;
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/**
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* @brief Current USB device configuration.
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*/
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uint8_t usb_configuration;
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/* End of the mandatory fields.*/
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};
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/**
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* @brief Fetches a 16 bits word value from an USB message.
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*
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* @param[in] p pointer to the 16 bits word
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*
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* @notapi
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*/
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#define usb_lld_fetch_word(p) (*(uint16_t *)p)
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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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* @notapi
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*/
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#define usb_lld_get_frame_number(usbp) (STM32_USB->FNR & FNR_FN_MASK)
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if STM32_USB_USE_USB1 && !defined(__DOXYGEN__)
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extern USBDriver USBD1;
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#endif
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#if !defined(__DOXYGEN__)
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extern const USBEndpointConfig usb_lld_ep0config;
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#endif
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#if !defined(__DOXYGEN__)
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extern USBEndpointState usb_lld_ep0state;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void usb_lld_init(void);
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void usb_lld_start(USBDriver *usbp);
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void usb_lld_stop(USBDriver *usbp);
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void usb_lld_reset(USBDriver *usbp);
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void usb_lld_set_address(USBDriver *usbp, uint8_t addr);
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void usb_lld_init_endpoint(USBDriver *usbp, usbep_t ep);
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void usb_lld_disable_endpoints(USBDriver *usbp);
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size_t usb_lld_get_readable(USBDriver *usbp, usbep_t ep);
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size_t usb_lld_read(USBDriver *usbp, usbep_t ep,
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uint8_t *buf, size_t n);
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size_t usb_lld_write(USBDriver *usbp, usbep_t ep,
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const uint8_t *buf, size_t n);
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usbepstatus_t usb_lld_get_status_in(USBDriver *usbp, usbep_t ep);
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usbepstatus_t usb_lld_get_status_out(USBDriver *usbp, usbep_t ep);
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void usb_lld_stall_in(USBDriver *usbp, usbep_t ep);
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void usb_lld_stall_out(USBDriver *usbp, usbep_t ep);
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void usb_lld_clear_in(USBDriver *usbp, usbep_t ep);
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void usb_lld_clear_out(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_LLD_H_ */
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/** @} */
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