88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/****************************************************************************
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* drivers/devicetree/fdt_virtio_mmio.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/fdt.h>
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#include <nuttx/virtio/virtio-mmio.h>
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#include <libfdt.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: fdt_virtio_mmio_devices_register
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*
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* Description:
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* This function is used to register the virtio mmio devices from the
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* device tree
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*
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* Input Parameters:
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* fdt - Device tree handle
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* irqbase - Interrupt base number
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*
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* Returned Value:
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* Return 0 if success, nageative if failed
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*
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****************************************************************************/
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int fdt_virtio_mmio_devices_register(FAR const void *fdt, int irqbase)
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{
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uintptr_t addr;
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int offset = -1;
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int irqnum;
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int ret;
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for (; ; )
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{
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offset = fdt_node_offset_by_compatible(fdt, offset, "virtio,mmio");
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if (offset == -FDT_ERR_NOTFOUND)
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{
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break;
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}
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addr = fdt_get_reg_base(fdt, offset, 0);
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irqnum = fdt_get_irq(fdt, offset, 1, irqbase);
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if (addr <= 0 || irqnum < 0)
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{
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return -EINVAL;
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}
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ret = virtio_register_mmio_device((FAR void *)addr, irqnum);
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if (ret < 0 && ret != -ENODEV)
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{
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return ret;
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}
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}
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return OK;
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}
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