468 lines
15 KiB
C
468 lines
15 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 STM32/OTGv1/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_otg.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 3
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/**
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* @brief The address can be changed immediately upon packet reception.
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*/
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#define USB_SET_ADDRESS_MODE USB_EARLY_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 OTG1 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_OTG1) || defined(__DOXYGEN__)
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#define STM32_USB_USE_OTG1 TRUE
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#endif
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/**
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* @brief OTG1 interrupt priority level setting.
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*/
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#if !defined(STM32_USB_OTG1_IRQ_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_USB_OTG1_IRQ_PRIORITY 14
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#endif
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/**
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* @brief OTG1 RX shared FIFO size.
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* @note Must be a multiple of 4.
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*/
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#if !defined(STM32_USB_OTG1_RX_FIFO_SIZE) || defined(__DOXYGEN__)
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#define STM32_USB_OTG1_RX_FIFO_SIZE 512
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#endif
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/**
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* @brief Dedicated data pump thread priority.
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*/
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#if !defined(STM32_USB_THREAD_PRIORITY) || defined(__DOXYGEN__)
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#define STM32_USB_THREAD_PRIORITY LOWPRIO
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#endif
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/**
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* @brief Dedicated data pump thread stack size.
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*/
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#if !defined(STM32_USB_THREAD_STACK_SIZE) || defined(__DOXYGEN__)
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#define STM32_USB_THREAD_STACK_SIZE 128
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#endif
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/**
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* @brief Exception priority level during TXFIFOs operations.
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* @note Because an undocumented silicon behavior the operation of
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* copying a packet into a TXFIFO must not be interrupted by
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* any other operation on the OTG peripheral.
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* This parameter represents the priority mask during copy
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* operations. The default value only allows to call USB
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* functions from callbacks invoked from USB ISR handlers.
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* If you need to invoke USB functions from other handlers
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* then raise this priority mast to the same level of the
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* handler you need to use.
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* @note The value zero means disabled, when disabled calling USB
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* functions is only safe from thread level or from USB
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* callbacks.
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*/
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#if !defined(STM32_USB_FIFO_FILL_PRIORITY_MASK) || defined(__DOXYGEN__)
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#define STM32_USB_FIFO_FILL_PRIORITY_MASK 0
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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_OTG1 && !STM32_HAS_OTG1
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#error "OTG1 not present in the selected device"
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#endif
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#if !STM32_USB_USE_OTG1
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#error "USB driver activated but no USB peripheral assigned"
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#endif
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#if STM32_USB_USE_OTG1 && \
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!CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_USB_OTG1_IRQ_PRIORITY)
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#error "Invalid IRQ priority assigned to OTG1"
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#endif
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#if (STM32_USB_OTG1_RX_FIFO_SIZE & 3) != 0
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#error "RX FIFO size must be a multiple of 4"
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#endif
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#if defined(STM32F4XX) || defined(STM32F2XX)
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#define STM32_USBCLK STM32_PLL48CLK
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#elif defined(STM32F10X_CL)
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#define STM32_USBCLK STM32_OTGFSCLK
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#else
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#error "unsupported STM32 platform for OTG functionality"
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#endif
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#if STM32_USBCLK != 48000000
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#error "the USB OTG 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 IN endpoint state structure.
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*/
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typedef struct {
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/**
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* @brief Buffer mode, queue or linear.
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*/
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bool_t txqueued;
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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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union {
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struct {
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/**
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* @brief Pointer to the transmission linear buffer.
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*/
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const uint8_t *txbuf;
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} linear;
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struct {
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/**
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* @brief Pointer to the output queue.
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*/
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OutputQueue *txqueue;
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} queue;
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} mode;
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} USBInEndpointState;
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/**
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* @brief Type of an OUT endpoint state structure.
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*/
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typedef struct {
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/**
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* @brief Buffer mode, queue or linear.
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*/
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bool_t rxqueued;
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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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union {
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struct {
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/**
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* @brief Pointer to the receive linear buffer.
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*/
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uint8_t *rxbuf;
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} linear;
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struct {
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/**
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* @brief Pointer to the input queue.
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*/
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InputQueue *rxqueue;
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} queue;
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} mode;
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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 Setup packet notification callback.
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* @details This callback is invoked when a setup packet has been
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* received.
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* @post The application must immediately call @p usbReadPacket() in
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* order to access the received packet.
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* @note This field is only valid for @p USB_EP_MODE_TYPE_CTRL
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* endpoints, it should be set to @p NULL for other endpoint
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* types.
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*/
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usbepcallback_t setup_cb;
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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.
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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.
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*/
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USBOutEndpointState *out_state;
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/* End of the mandatory fields.*/
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/**
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* @brief Determines the space allocated for the TXFIFO as multiples of
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* the packet size (@p in_maxsize). Note that zero is interpreted
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* as one for simplicity and robustness.
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*/
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uint16_t in_multiplier;
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/**
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* @brief Pointer to a buffer for setup packets.
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* @details Setup packets require a dedicated 8-bytes buffer, set this
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* field to @p NULL for non-control endpoints.
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*/
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uint8_t *setup_buf;
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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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#if defined(USB_DRIVER_EXT_FIELDS)
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USB_DRIVER_EXT_FIELDS
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#endif
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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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* @brief Mask of TXFIFOs to be filled by the pump thread.
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*/
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uint32_t txpending;
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/**
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* @brief Pointer to the thread.
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*/
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Thread *thd_ptr;
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/**
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* @brief Pointer to the thread when it is sleeping or @p NULL.
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*/
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Thread *thd_wait;
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/**
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* @brief Working area for the dedicated data pump thread;
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*/
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WORKING_AREA(wa_pump, STM32_USB_THREAD_STACK_SIZE);
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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 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 Connects the USB device.
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*
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* @api
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*/
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#define usb_lld_connect_bus(usbp) (OTG->GCCFG |= GCCFG_VBUSBSEN)
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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 usb_lld_disconnect_bus(usbp) (OTG->GCCFG &= ~GCCFG_VBUSBSEN)
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if STM32_USB_USE_OTG1 && !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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void usb_lld_read_setup(USBDriver *usbp, usbep_t ep, uint8_t *buf);
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void usb_lld_prepare_receive(USBDriver *usbp, usbep_t ep);
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void usb_lld_prepare_transmit(USBDriver *usbp, usbep_t ep);
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void usb_lld_start_out(USBDriver *usbp, usbep_t ep);
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void usb_lld_start_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_stall_in(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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