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/*!
\file usbh_hcs.c
\brief this file implements functions for opening and closing host channels
\version 2017-06-06, V1.0.0, firmware for GD32F3x0
\version 2019-06-01, V2.0.0, firmware for GD32F3x0
*/
/*
Copyright (c) 2019, GigaDevice Semiconductor Inc.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. Neither the name of the copyright holder nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.
*/
#include "usbh_hcs.h"
static uint16_t usbh_freechannel_get (usb_core_handle_struct *pudev);
/*!
\brief open a channel
\param[in] pudev: pointer to usb device
\param[in] channel_num: host channel number which is in (0..7)
\param[in] dev_addr: USB device address allocated to attached device
\param[in] dev_speed: USB device speed (Full speed/Low speed)
\param[in] ep_type: endpoint type (bulk/int/ctl)
\param[in] ep_mps: max packet size
\param[out] none
\retval operation status
*/
uint8_t usbh_channel_open (usb_core_handle_struct *pudev,
uint8_t channel_num,
uint8_t dev_addr,
uint8_t dev_speed,
uint8_t ep_type,
uint16_t ep_mps)
{
usb_hostchannel_struct *puhc = &pudev->host.host_channel[channel_num];
uint16_t channel_info = puhc->info;
puhc->endp_id = (uint8_t)channel_info & 0x7FU;
puhc->endp_in = (uint8_t)(channel_info & 0x80U) >> 7;
puhc->endp_type = ep_type;
puhc->endp_mps = ep_mps;
puhc->dev_addr = dev_addr;
puhc->dev_speed = dev_speed;
puhc->data_tg_in = 0U;
puhc->data_tg_out = 0U;
usb_hostchannel_init(pudev, channel_num);
return (uint8_t)HC_OK;
}
/*!
\brief modify a channel
\param[in] pudev: pointer to usb device
\param[in] channel_num: host channel number which is in (0..7)
\param[in] dev_addr: USB Device address allocated to attached device
\param[in] dev_speed: USB device speed (Full speed/Low speed)
\param[in] ep_type: endpoint type (bulk/int/ctl)
\param[in] ep_mps: max packet size
\param[out] none
\retval operation status
*/
uint8_t usbh_channel_modify (usb_core_handle_struct *pudev,
uint8_t channel_num,
uint8_t dev_addr,
uint8_t dev_speed,
uint8_t ep_type,
uint16_t ep_mps)
{
usb_hostchannel_struct *puhc = &pudev->host.host_channel[channel_num];
if (0U != dev_addr) {
puhc->dev_addr = dev_addr;
}
if ((puhc->endp_mps != ep_mps) && (0U != ep_mps)) {
puhc->endp_mps = ep_mps;
}
if ((puhc->dev_speed != dev_speed) && (0U != dev_speed)) {
puhc->dev_speed = dev_speed;
}
usb_hostchannel_init(pudev, channel_num);
return (uint8_t)HC_OK;
}
/*!
\brief allocate a new channel for the pipe
\param[in] pudev: pointer to usb device
\param[in] ep_addr: endpoint for which the channel to be allocated
\param[out] none
\retval host channel number
*/
uint8_t usbh_channel_alloc (usb_core_handle_struct *pudev, uint8_t ep_addr)
{
uint16_t hc_num = usbh_freechannel_get(pudev);
if ((uint16_t)HC_ERROR != hc_num) {
pudev->host.host_channel[hc_num].info = HC_USED | ep_addr;
}
return (uint8_t)hc_num;
}
/*!
\brief free the usb host channel
\param[in] pudev: pointer to usb device
\param[in] index: channel number to be freed which is in (0..7)
\param[out] none
\retval host operation status
*/
uint8_t usbh_channel_free (usb_core_handle_struct *pudev, uint8_t index)
{
if (index < HC_MAX) {
pudev->host.host_channel[index].info &= HC_USED_MASK;
}
return USBH_OK;
}
/*!
\brief free all usb host channel
\param[in] pudev: pointer to usb device
\param[out] none
\retval host operation status
*/
uint8_t usbh_allchannel_dealloc (usb_core_handle_struct *pudev)
{
uint8_t index;
for (index = 2U; index < HC_MAX; index ++) {
pudev->host.host_channel[index].info = 0U;
}
return USBH_OK;
}
/*!
\brief get a free channel number for allocation to a device endpoint
\param[in] pudev: pointer to usb device
\param[out] none
\retval free channel number
*/
static uint16_t usbh_freechannel_get (usb_core_handle_struct *pudev)
{
uint8_t index = 0U;
for (index = 0U; index < HC_MAX; index++) {
if (0U == (pudev->host.host_channel[index].info & HC_USED)) {
return (uint16_t)index;
}
}
return HC_ERROR;
}
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