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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2014 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <linux/libfdt.h>
#include <pci.h>
#include <dm/lists.h>
struct sandbox_pci_emul_priv {
int dev_count;
};
int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
struct udevice **containerp, struct udevice **emulp)
{
struct udevice *dev;
int ret;
*containerp = NULL;
ret = pci_bus_find_devfn(bus, PCI_MASK_BUS(find_devfn), &dev);
if (ret) {
debug("%s: Could not find emulator for dev %x\n", __func__,
find_devfn);
return ret;
}
*containerp = dev;
if (device_get_uclass_id(dev) == UCLASS_PCI_GENERIC) {
ret = device_find_first_child(dev, emulp);
if (ret)
return ret;
} else {
*emulp = dev;
}
return *emulp ? 0 : -ENODEV;
}
static int sandbox_pci_emul_post_probe(struct udevice *dev)
{
struct sandbox_pci_emul_priv *priv = dev->uclass->priv;
priv->dev_count++;
sandbox_set_enable_pci_map(true);
return 0;
}
static int sandbox_pci_emul_pre_remove(struct udevice *dev)
{
struct sandbox_pci_emul_priv *priv = dev->uclass->priv;
priv->dev_count--;
sandbox_set_enable_pci_map(priv->dev_count > 0);
return 0;
}
UCLASS_DRIVER(pci_emul) = {
.id = UCLASS_PCI_EMUL,
.name = "pci_emul",
.post_probe = sandbox_pci_emul_post_probe,
.pre_remove = sandbox_pci_emul_pre_remove,
.priv_auto_alloc_size = sizeof(struct sandbox_pci_emul_priv),
};
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