75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2014 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <fdtdec.h>
|
|
#include <inttypes.h>
|
|
#include <pci.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static int sandbox_pci_write_config(struct udevice *bus, pci_dev_t devfn,
|
|
uint offset, ulong value,
|
|
enum pci_size_t size)
|
|
{
|
|
struct dm_pci_emul_ops *ops;
|
|
struct udevice *emul;
|
|
int ret;
|
|
|
|
ret = sandbox_pci_get_emul(bus, devfn, &emul);
|
|
if (ret)
|
|
return ret == -ENODEV ? 0 : ret;
|
|
ops = pci_get_emul_ops(emul);
|
|
if (!ops || !ops->write_config)
|
|
return -ENOSYS;
|
|
|
|
return ops->write_config(emul, offset, value, size);
|
|
}
|
|
|
|
static int sandbox_pci_read_config(struct udevice *bus, pci_dev_t devfn,
|
|
uint offset, ulong *valuep,
|
|
enum pci_size_t size)
|
|
{
|
|
struct dm_pci_emul_ops *ops;
|
|
struct udevice *emul;
|
|
int ret;
|
|
|
|
/* Prepare the default response */
|
|
*valuep = pci_get_ff(size);
|
|
ret = sandbox_pci_get_emul(bus, devfn, &emul);
|
|
if (ret)
|
|
return ret == -ENODEV ? 0 : ret;
|
|
ops = pci_get_emul_ops(emul);
|
|
if (!ops || !ops->read_config)
|
|
return -ENOSYS;
|
|
|
|
return ops->read_config(emul, offset, valuep, size);
|
|
}
|
|
|
|
static const struct dm_pci_ops sandbox_pci_ops = {
|
|
.read_config = sandbox_pci_read_config,
|
|
.write_config = sandbox_pci_write_config,
|
|
};
|
|
|
|
static const struct udevice_id sandbox_pci_ids[] = {
|
|
{ .compatible = "sandbox,pci" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pci_sandbox) = {
|
|
.name = "pci_sandbox",
|
|
.id = UCLASS_PCI,
|
|
.of_match = sandbox_pci_ids,
|
|
.ops = &sandbox_pci_ops,
|
|
|
|
/* Attach an emulator if we can */
|
|
.child_post_bind = dm_scan_fdt_dev,
|
|
.per_child_platdata_auto_alloc_size =
|
|
sizeof(struct pci_child_platdata),
|
|
};
|