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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <bl.h>
#include <hostIntf.h>
#include <hostIntf_priv.h>
#include <variant/variant.h>
#include <plat/cmsis.h>
#include <plat/spi.h>
const struct HostIntfComm *platHostIntfInit()
{
uint32_t priorityGroup = NVIC_GetPriorityGrouping();
uint32_t priority, preemptPriority, subPriority;
enum IRQn rx, tx;
const struct HostIntfComm *ret = NULL;
#if defined(PLATFORM_HOST_INTF_I2C_BUS)
ret = hostIntfI2cInit(PLATFORM_HOST_INTF_I2C_BUS);
#elif defined(PLATFORM_HOST_INTF_SPI_BUS)
ret = hostIntfSpiInit(PLATFORM_HOST_INTF_SPI_BUS);
/* get the rx and tx irq numbers used by the host spi bus */
ret->request();
rx = spiRxIrq(PLATFORM_HOST_INTF_SPI_BUS);
tx = spiTxIrq(PLATFORM_HOST_INTF_SPI_BUS);
ret->release();
/* make the tx and rx dma isrs execute before other isrs when multiple
interrupts are pending (if avaliable subpriority bits).
We do not change the preempt priority */
priority = NVIC_GetPriority(rx);
NVIC_DecodePriority (priority, priorityGroup, &preemptPriority, &subPriority);
if (&subPriority > 0)
subPriority --;
NVIC_SetPriority(rx, NVIC_EncodePriority(priorityGroup, preemptPriority, subPriority));
priority = NVIC_GetPriority(tx);
NVIC_DecodePriority (priority, priorityGroup, &preemptPriority, &subPriority);
if (&subPriority > 0)
subPriority --;
NVIC_SetPriority(tx, NVIC_EncodePriority(priorityGroup, preemptPriority, subPriority));
#else
#error "No host interface bus specified"
#endif
return ret;
}
uint16_t platHwType(void)
{
return PLATFORM_HW_TYPE;
}
uint16_t platHwVer(void)
{
return PLATFORM_HW_VER;
}
uint16_t platBlVer()
{
return BL.blGetVersion();
}
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