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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;
/*
* See commit 4345998ae9df,
* "pci: sandbox: Support dynamically binding device driver"
*/
ret = uclass_get_device_by_phandle(UCLASS_PCI_EMUL, dev, "sandbox,emul",
emulp);
if (ret && device_get_uclass_id(dev) != UCLASS_PCI_GENERIC)
*emulp = dev;
return *emulp ? 0 : -ENODEV;
}
uint sandbox_pci_read_bar(u32 barval, int type, uint size)
{
u32 result;
result = barval;
if (result == 0xffffffff) {
if (type == PCI_BASE_ADDRESS_SPACE_IO) {
result = (~(size - 1) &
PCI_BASE_ADDRESS_IO_MASK) |
PCI_BASE_ADDRESS_SPACE_IO;
} else {
result = (~(size - 1) &
PCI_BASE_ADDRESS_MEM_MASK) |
PCI_BASE_ADDRESS_MEM_TYPE_32;
}
}
return result;
}
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),
};
/*
* This uclass is a child of the pci bus. Its platdata is not defined here so
* is defined by its parent, UCLASS_PCI, which uses struct pci_child_platdata.
* See per_child_platdata_auto_alloc_size in UCLASS_DRIVER(pci).
*/
UCLASS_DRIVER(pci_emul_parent) = {
.id = UCLASS_PCI_EMUL_PARENT,
.name = "pci_emul_parent",
.post_bind = dm_scan_fdt_dev,
};
static const struct udevice_id pci_emul_parent_ids[] = {
{ .compatible = "sandbox,pci-emul-parent" },
{ }
};
U_BOOT_DRIVER(pci_emul_parent_drv) = {
.name = "pci_emul_parent_drv",
.id = UCLASS_PCI_EMUL_PARENT,
.of_match = pci_emul_parent_ids,
};
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