82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
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/*
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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 <hostIntf.h>
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#include <hostIntf_priv.h>
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#include <nanohubPacket.h>
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#include <i2c.h>
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#define NANOHUB_I2C_SLAVE_ADDRESS 0x55
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static uint32_t gBusId;
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static void hostIntfI2cPreambleCallback(void *cookie, size_t tx, size_t rx, int err)
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{
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}
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static void hostIntfI2cRxCallback(void *cookie, size_t tx, size_t rx, int err)
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{
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HostIntfCommCallbackF callback = cookie;
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i2cSlaveTxPreamble(gBusId, NANOHUB_PREAMBLE_BYTE,
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hostIntfI2cPreambleCallback, NULL);
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callback(rx, err);
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}
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static void hostIntfI2cTxCallback(void *cookie, size_t tx, size_t rx, int err)
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{
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HostIntfCommCallbackF callback = cookie;
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i2cSlaveTxPreamble(gBusId, NANOHUB_PREAMBLE_BYTE,
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hostIntfI2cPreambleCallback, NULL);
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callback(tx, err);
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}
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static int hostIntfI2cRequest()
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{
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return i2cSlaveRequest(gBusId, NANOHUB_I2C_SLAVE_ADDRESS);
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}
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static int hostIntfI2cRxPacket(void *rxBuf, size_t rxSize,
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HostIntfCommCallbackF callback)
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{
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i2cSlaveEnableRx(gBusId, rxBuf, rxSize, hostIntfI2cRxCallback,
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callback);
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return 0;
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}
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static int hostIntfI2cTxPacket(const void *txBuf, size_t txSize,
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HostIntfCommCallbackF callback)
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{
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return i2cSlaveTxPacket(gBusId, txBuf, txSize, hostIntfI2cTxCallback,
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callback);
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}
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static int hostIntfI2cRelease(void)
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{
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return i2cSlaveRelease(gBusId);
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}
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static const struct HostIntfComm gI2cComm = {
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.request = hostIntfI2cRequest,
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.rxPacket = hostIntfI2cRxPacket,
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.txPacket = hostIntfI2cTxPacket,
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.release = hostIntfI2cRelease,
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};
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const struct HostIntfComm *hostIntfI2cInit(uint32_t busId)
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{
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gBusId = busId;
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return &gI2cComm;
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}
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