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/*!
\file usbh_hcs.c
\brief this file implements functions for opening and closing host channels
*/
/*
Copyright (C) 2017 GigaDevice
2017-02-10, V1.0.0, firmware for GD32F30x
*/
#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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