438 lines
14 KiB
C
438 lines
14 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file STM32/USBv1/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 FALSE
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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 13
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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_USB_USE_USB1 && \
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!CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_USB_USB1_HP_IRQ_PRIORITY)
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#error "Invalid IRQ priority assigned to USB HP"
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#endif
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#if STM32_USB_USE_USB1 && \
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!CORTEX_IS_VALID_KERNEL_PRIORITY(STM32_USB_USB1_LP_IRQ_PRIORITY)
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#error "Invalid IRQ priority assigned to USB LP"
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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 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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/* End of the mandatory fields.*/
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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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/* End of the mandatory fields.*/
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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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} 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 Reserved field, not currently used.
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* @note Initialize this field to 1 in order to be forward compatible.
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*/
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uint16_t ep_buffers;
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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 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 Fields available to user, it can be used to associate an
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* application-defined handler to an IN endpoint.
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* @note The base index is one, the endpoint zero does not have a
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* reserved element in this array.
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*/
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void *in_params[USB_MAX_ENDPOINTS];
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/**
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* @brief Fields available to user, it can be used to associate an
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* application-defined handler to an OUT endpoint.
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* @note The base index is one, the endpoint zero does not have a
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* reserved element in this array.
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*/
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void *out_params[USB_MAX_ENDPOINTS];
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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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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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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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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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