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/** @defgroup usb_drivers_file Generic USB Drivers
@ingroup USB
@brief <b>Generic USB Drivers</b>
@version 1.0.0
@author @htmlonly © @endhtmlonly 2010
Gareth McMullin <gareth@blacksphere.co.nz>
@date 10 March 2013
LGPL License Terms @ref lgpl_license
*/
/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**@{*/
#include <string.h>
#include <libopencm3/usb/usbd.h>
#include "usb_private.h"
/**
* Main initialization entry point.
*
* Initialize the USB firmware library to implement the USB device described
* by the descriptors provided.
*
* It is required that the 48MHz USB clock is already available.
*
* @param driver TODO
* @param dev Pointer to USB device descriptor. This must not be changed while
* the device is in use.
* @param conf Pointer to array of USB configuration descriptors. These must
* not be changed while the device is in use. The length of this
* array is determined by the bNumConfigurations field in the
* device descriptor.
* @param strings TODO
* @param control_buffer Pointer to array that would hold the data
* received during control requests with DATA
* stage
* @param control_buffer_size Size of control_buffer
* @return Zero on success (currently cannot fail).
*/
usbd_device *usbd_init(const usbd_driver *driver,
const struct usb_device_descriptor *dev,
const struct usb_config_descriptor *conf,
const char **strings, int num_strings,
uint8_t *control_buffer, uint16_t control_buffer_size)
{
usbd_device *usbd_dev;
usbd_dev = driver->init();
usbd_dev->driver = driver;
usbd_dev->desc = dev;
usbd_dev->config = conf;
usbd_dev->strings = strings;
usbd_dev->num_strings = num_strings;
usbd_dev->ctrl_buf = control_buffer;
usbd_dev->ctrl_buf_len = control_buffer_size;
usbd_dev->user_callback_ctr[0][USB_TRANSACTION_SETUP] =
_usbd_control_setup;
usbd_dev->user_callback_ctr[0][USB_TRANSACTION_OUT] =
_usbd_control_out;
usbd_dev->user_callback_ctr[0][USB_TRANSACTION_IN] =
_usbd_control_in;
return usbd_dev;
}
void usbd_register_reset_callback(usbd_device *usbd_dev, void (*callback)(void))
{
usbd_dev->user_callback_reset = callback;
}
void usbd_register_suspend_callback(usbd_device *usbd_dev,
void (*callback)(void))
{
usbd_dev->user_callback_suspend = callback;
}
void usbd_register_resume_callback(usbd_device *usbd_dev,
void (*callback)(void))
{
usbd_dev->user_callback_resume = callback;
}
void usbd_register_sof_callback(usbd_device *usbd_dev, void (*callback)(void))
{
usbd_dev->user_callback_sof = callback;
}
void _usbd_reset(usbd_device *usbd_dev)
{
usbd_dev->current_address = 0;
usbd_dev->current_config = 0;
usbd_ep_setup(usbd_dev, 0, USB_ENDPOINT_ATTR_CONTROL, 64, NULL);
usbd_dev->driver->set_address(usbd_dev, 0);
if (usbd_dev->user_callback_reset) {
usbd_dev->user_callback_reset();
}
}
/* Functions to wrap the low-level driver */
void usbd_poll(usbd_device *usbd_dev)
{
usbd_dev->driver->poll(usbd_dev);
}
void usbd_disconnect(usbd_device *usbd_dev, bool disconnected)
{
/* not all drivers support disconnection */
if (usbd_dev->driver->disconnect) {
usbd_dev->driver->disconnect(usbd_dev, disconnected);
}
}
void usbd_ep_setup(usbd_device *usbd_dev, uint8_t addr, uint8_t type,
uint16_t max_size,
void (*callback)(usbd_device *usbd_dev, uint8_t ep))
{
usbd_dev->driver->ep_setup(usbd_dev, addr, type, max_size, callback);
}
uint16_t usbd_ep_write_packet(usbd_device *usbd_dev, uint8_t addr,
const void *buf, uint16_t len)
{
return usbd_dev->driver->ep_write_packet(usbd_dev, addr, buf, len);
}
uint16_t usbd_ep_read_packet(usbd_device *usbd_dev, uint8_t addr, void *buf,
uint16_t len)
{
return usbd_dev->driver->ep_read_packet(usbd_dev, addr, buf, len);
}
void usbd_ep_stall_set(usbd_device *usbd_dev, uint8_t addr, uint8_t stall)
{
usbd_dev->driver->ep_stall_set(usbd_dev, addr, stall);
}
uint8_t usbd_ep_stall_get(usbd_device *usbd_dev, uint8_t addr)
{
return usbd_dev->driver->ep_stall_get(usbd_dev, addr);
}
void usbd_ep_nak_set(usbd_device *usbd_dev, uint8_t addr, uint8_t nak)
{
usbd_dev->driver->ep_nak_set(usbd_dev, addr, nak);
}
/**@}*/
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