/*!
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\file usbd_core.c
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\brief USB device driver
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\version 2020-08-01, V3.0.0, firmware for GD32F30x
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*/
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/*
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Copyright (c) 2020, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "usbd_core.h"
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#include "usbd_enum.h"
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#include "usbd_transc.h"
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#include "usbd_lld_core.h"
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usbd_int_cb_struct *usbd_int_fops = NULL;
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/*!
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\brief configure USB device initialization
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\param[in] udev: pointer to USB core instance
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\param[in] core: endpoint address
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\param[in] usbc: USB class
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\param[in] usbha: USB handler
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\param[out] none
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\retval none
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*/
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void usbd_init (usb_dev *udev, usb_desc *desc, usb_class *usbc)
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{
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/* configure USBD core basic attributes */
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usbd_core.basic.max_ep_count = 8U;
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usbd_core.basic.twin_buf = 1U;
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usbd_core.basic.ram_size = 512U;
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usbd_core.dev = udev;
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udev->desc = desc;
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udev->class_core = usbc;
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udev->drv_handler = &usbd_drv_handler;
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udev->ep_transc[0][TRANSC_SETUP] = _usb_setup_transc;
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udev->ep_transc[0][TRANSC_OUT] = _usb_out0_transc;
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udev->ep_transc[0][TRANSC_IN] = _usb_in0_transc;
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/* configure power management */
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udev->pm.power_mode = (udev->desc->config_desc[7] & 0x40U) >> 5;
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/* enable USB suspend */
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udev->pm.suspend_enabled = 1U;
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/* USB low level initialization */
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udev->drv_handler->init();
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/* create serial string */
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serial_string_get((uint16_t *)udev->desc->strings[STR_IDX_SERIAL]);
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}
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/*!
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\brief endpoint prepare to receive data
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\param[in] udev: pointer to USB core instance
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\param[in] ep_addr: endpoint address
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in this parameter:
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bit0..bit6: endpoint number (0..7)
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bit7: endpoint direction which can be IN(1) or OUT(0)
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\param[in] pbuf: user buffer address pointer
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\param[in] buf_len: buffer length
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\param[out] none
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\retval none
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*/
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void usbd_ep_recev (usb_dev *udev, uint8_t ep_addr, uint8_t *pbuf, uint16_t buf_len)
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{
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/* configure the transaction level parameters */
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usb_transc *transc = &udev->transc_out[EP_ID(ep_addr)];
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usb_transc_config(transc, pbuf, buf_len, 0U);
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/* enable endpoint to receive */
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udev->drv_handler->ep_rx_enable(udev, ep_addr);
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}
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/*!
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\brief endpoint prepare to transmit data
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\param[in] udev: pointer to USB core instance
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\param[in] ep_addr: endpoint address
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in this parameter:
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bit0..bit6: endpoint number (0..7)
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bit7: endpoint direction which can be IN(1) or OUT(0)
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\param[in] pbuf: transmit buffer address pointer
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\param[in] buf_len: buffer length
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\param[out] none
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\retval none
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*/
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void usbd_ep_send (usb_dev *udev, uint8_t ep_addr, uint8_t *pbuf, uint16_t buf_len)
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{
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uint8_t ep_num = EP_ID(ep_addr);
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usb_transc *transc = &udev->transc_in[ep_num];
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uint16_t len = USB_MIN(buf_len, transc->max_len);
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/* configure the transaction level parameters */
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udev->drv_handler->ep_write(pbuf, ep_num, len);
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usb_transc_config(transc, pbuf + len, buf_len - len, len);
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}
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