351 lines
9.6 KiB
C
351 lines
9.6 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 templates/usb_lld.c
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* @brief USB Driver subsystem low level driver source template.
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*
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* @addtogroup USB
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_USB || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief EP0 state.
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* @note It is an union because IN and OUT endpoints are never used at the
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* same time for EP0.
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*/
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static union {
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/**
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* @brief IN EP0 state.
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*/
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USBInEndpointState in;
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/**
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* @brief OUT EP0 state.
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*/
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USBOutEndpointState out;
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} ep0_state;
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/**
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* @brief EP0 initialization structure.
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*/
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static const USBEndpointConfig ep0config = {
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USB_EP_MODE_TYPE_CTRL | USB_EP_MODE_TRANSACTION,
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_usb_ep0in,
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_usb_ep0out,
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0x40,
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0x40,
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&ep0_state.in,
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&ep0_state.out
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};
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level USB driver initialization.
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*
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* @notapi
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*/
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void usb_lld_init(void) {
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}
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/**
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* @brief Configures and activates the USB peripheral.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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*
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* @notapi
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*/
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void usb_lld_start(USBDriver *usbp) {
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if (usbp->state == USB_STOP) {
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/* Clock activation.*/
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/* Reset procedure enforced on driver start.*/
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_usb_reset(usbp);
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}
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/* Configuration.*/
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}
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/**
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* @brief Deactivates the USB peripheral.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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*
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* @notapi
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*/
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void usb_lld_stop(USBDriver *usbp) {
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/* If in ready state then disables the USB clock.*/
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if (usbp->state == USB_STOP) {
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}
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}
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/**
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* @brief USB low level reset routine.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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*
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* @notapi
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*/
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void usb_lld_reset(USBDriver *usbp) {
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/* Post reset initialization.*/
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/* EP0 initialization.*/
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usbp->epc[0] = &ep0config;
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usb_lld_init_endpoint(usbp, 0);
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}
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/**
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* @brief Sets the USB address.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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*
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* @notapi
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*/
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void usb_lld_set_address(USBDriver *usbp) {
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}
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/**
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* @brief Enables an endpoint.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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void usb_lld_init_endpoint(USBDriver *usbp, usbep_t ep) {
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}
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/**
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* @brief Disables all the active endpoints except the endpoint zero.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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*
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* @notapi
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*/
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void usb_lld_disable_endpoints(USBDriver *usbp) {
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}
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/**
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* @brief Returns the status of an OUT endpoint.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @return The endpoint status.
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* @retval EP_STATUS_DISABLED The endpoint is not active.
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* @retval EP_STATUS_STALLED The endpoint is stalled.
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* @retval EP_STATUS_ACTIVE The endpoint is active.
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*
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* @notapi
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*/
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usbepstatus_t usb_lld_get_status_out(USBDriver *usbp, usbep_t ep) {
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}
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/**
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* @brief Returns the status of an IN endpoint.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @return The endpoint status.
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* @retval EP_STATUS_DISABLED The endpoint is not active.
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* @retval EP_STATUS_STALLED The endpoint is stalled.
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* @retval EP_STATUS_ACTIVE The endpoint is active.
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*
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* @notapi
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*/
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usbepstatus_t usb_lld_get_status_in(USBDriver *usbp, usbep_t ep) {
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}
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/**
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* @brief Reads a setup packet from the dedicated packet buffer.
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* @details This function must be invoked in the context of the @p setup_cb
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* callback in order to read the received setup packet.
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* @pre In order to use this function the endpoint must have been
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* initialized as a control endpoint.
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* @post The endpoint is ready to accept another packet.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[out] buf buffer where to copy the packet data
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*
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* @notapi
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*/
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void usb_lld_read_setup(USBDriver *usbp, usbep_t ep, uint8_t *buf) {
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}
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/**
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* @brief Reads a packet from the dedicated packet buffer.
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* @pre In order to use this function he endpoint must have been
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* initialized in packet mode.
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* @post The endpoint is ready to accept another packet.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[out] buf buffer where to copy the packet data
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* @param[in] n maximum number of bytes to copy. This value must
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* not exceed the maximum packet size for this endpoint.
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* @return The received packet size regardless the specified
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* @p n parameter.
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* @retval 0 Zero size packet received.
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*
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* @notapi
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*/
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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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}
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/**
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* @brief Writes a packet to the dedicated packet buffer.
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* @pre In order to use this function he endpoint must have been
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* initialized in packet mode.
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* @post The endpoint is ready to transmit the packet.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[in] buf buffer where to fetch the packet data
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* @param[in] n maximum number of bytes to copy. This value must
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* not exceed the maximum packet size for this endpoint.
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*
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* @notapi
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*/
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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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}
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/**
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* @brief Starts a receive operation on an OUT endpoint.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[out] buf buffer where to copy the endpoint data
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* @param[in] n maximum number of bytes to copy in the buffer
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*
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* @notapi
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*/
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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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}
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/**
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* @brief Starts a transmit operation on an IN endpoint.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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* @param[in] buf buffer where to fetch the endpoint data
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* @param[in] n maximum number of bytes to copy
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*
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* @notapi
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*/
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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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}
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/**
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* @brief Brings an OUT endpoint in the stalled state.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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void usb_lld_stall_out(USBDriver *usbp, usbep_t ep) {
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}
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/**
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* @brief Brings an IN endpoint in the stalled state.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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void usb_lld_stall_in(USBDriver *usbp, usbep_t ep) {
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}
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/**
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* @brief Brings an OUT endpoint in the active state.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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void usb_lld_clear_out(USBDriver *usbp, usbep_t ep) {
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}
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/**
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* @brief Brings an IN endpoint in the active state.
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*
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* @param[in] usbp pointer to the @p USBDriver object
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* @param[in] ep endpoint number
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*
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* @notapi
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*/
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void usb_lld_clear_in(USBDriver *usbp, usbep_t ep) {
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}
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#endif /* HAL_USE_USB */
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/** @} */
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