383 lines
12 KiB
C
383 lines
12 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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* @brief This device requires the address change after the status packet.
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*/
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#define USB_SET_ADDRESS_MODE USB_LATE_SET_ADDRESS
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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 Enables the USB device low power mode on suspend.
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*/
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#if !defined(STM32_USB_LOW_POWER_ON_SUSPEND) || defined(__DOXYGEN__)
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#define STM32_USB_LOW_POWER_ON_SUSPEND FALSE
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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 endpoint state structure.
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*/
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typedef struct {
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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 *txbuf;
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/**
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* @brief Requested transmit transfer size.
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*/
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size_t txsize;
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/**
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* @brief Transmitted bytes so far.
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*/
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size_t txcnt;
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} USBInEndpointState;
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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 Number of packets to receive.
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*/
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uint16_t rxpkts;
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/**
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* @brief Pointer to the receive buffer.
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*/
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uint8_t *rxbuf;
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/**
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* @brief Requested receive transfer size.
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*/
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size_t rxsize;
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/**
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* @brief Received bytes so far.
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*/
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size_t rxcnt;
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} USBOutEndpointState;
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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 Type and mode of the endpoint.
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*/
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uint32_t ep_mode;
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/**
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* @brief IN endpoint notification callback.
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* @details This field must be set to @p NULL if the IN endpoint is not
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* used.
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*/
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usbepcallback_t in_cb;
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/**
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* @brief OUT endpoint notification callback.
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* @details This field must be set to @p NULL if the OUT endpoint is not
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* used.
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*/
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usbepcallback_t out_cb;
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/**
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* @brief IN endpoint maximum packet size.
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* @details This field must be set to zero if the IN endpoint is not
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* used.
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*/
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uint16_t in_maxsize;
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/**
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* @brief OUT endpoint maximum packet size.
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* @details This field must be set to zero if the OUT endpoint is not
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* used.
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*/
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uint16_t out_maxsize;
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/**
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* @brief @p USBEndpointState associated to the IN endpoint.
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* @details This structure maintains the state of the IN endpoint when
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* the endpoint is not in packet mode. Endpoints configured in
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* packet mode must set this field to @p NULL.
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*/
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USBInEndpointState *in_state;
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/**
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* @brief @p USBEndpointState associated to the OUT endpoint.
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* @details This structure maintains the state of the OUT endpoint when
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* the endpoint is not in packet mode. Endpoints configured in
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* packet mode must set this field to @p NULL.
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*/
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USBOutEndpointState *out_state;
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/* End of the mandatory fields.*/
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} USBEndpointConfig;
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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 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 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 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 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 state;
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/**
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* @brief Current configuration data.
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*/
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const USBConfig *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 *param;
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/**
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* @brief Bit map of the transmitting IN endpoints.
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*/
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uint16_t transmitting;
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/**
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* @brief Bit map of the receiving OUT endpoints.
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*/
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uint16_t receiving;
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/**
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* @brief Active endpoints configurations.
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*/
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const USBEndpointConfig *epc[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 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 *ep0next;
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/**
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* @brief Number of bytes yet to be transferred through endpoint 0.
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*/
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size_t ep0n;
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/**
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* @brief Endpoint 0 end transaction callback.
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*/
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usbcallback_t ep0endcb;
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/**
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* @brief Setup packet buffer.
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*/
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uint8_t 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 status;
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/**
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* @brief Assigned USB address.
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*/
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uint8_t address;
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/**
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* @brief Current USB device configuration.
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*/
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uint8_t configuration;
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/* End of the mandatory fields.*/
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/**
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* @brief Pointer to the next address in the packet memory.
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*/
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uint32_t pmnext;
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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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* @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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* @notapi
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*/
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#define usb_lld_get_transaction_size(usbp, ep) \
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((usbp)->epc[ep]->out_state->rxcnt)
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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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* @notapi
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*/
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#define usb_lld_get_packet_size(usbp, ep) \
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((size_t)USB_GET_DESCRIPTOR(ep)->RXCOUNT & RXCOUNT_COUNT_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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#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);
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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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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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size_t usb_lld_read_packet(USBDriver *usbp, usbep_t ep,
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uint8_t *buf, size_t n);
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void usb_lld_write_packet(USBDriver *usbp, usbep_t ep,
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const uint8_t *buf, size_t n);
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void usb_lld_start_out(USBDriver *usbp, usbep_t ep,
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uint8_t *buf, size_t n);
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void usb_lld_start_in(USBDriver *usbp, usbep_t ep,
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const uint8_t *buf, size_t n);
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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_out(USBDriver *usbp, usbep_t ep);
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void usb_lld_clear_in(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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