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