blob: 6a84ee386d796e3422325824b02f357898bb0b44 [file] [log] [blame]
Simon Glass537849a2015-03-05 12:25:27 -07001/*
2 * Copyright (c) 2014 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
9#include <dm.h>
10#include <fdtdec.h>
11#include <inttypes.h>
12#include <pci.h>
Simon Glass537849a2015-03-05 12:25:27 -070013
14DECLARE_GLOBAL_DATA_PTR;
15
16static int sandbox_pci_write_config(struct udevice *bus, pci_dev_t devfn,
17 uint offset, ulong value,
18 enum pci_size_t size)
19{
20 struct dm_pci_emul_ops *ops;
21 struct udevice *emul;
22 int ret;
23
24 ret = sandbox_pci_get_emul(bus, devfn, &emul);
25 if (ret)
26 return ret == -ENODEV ? 0 : ret;
27 ops = pci_get_emul_ops(emul);
28 if (!ops || !ops->write_config)
29 return -ENOSYS;
30
31 return ops->write_config(emul, offset, value, size);
32}
33
34static int sandbox_pci_read_config(struct udevice *bus, pci_dev_t devfn,
35 uint offset, ulong *valuep,
36 enum pci_size_t size)
37{
38 struct dm_pci_emul_ops *ops;
39 struct udevice *emul;
40 int ret;
41
42 /* Prepare the default response */
43 *valuep = pci_get_ff(size);
44 ret = sandbox_pci_get_emul(bus, devfn, &emul);
45 if (ret)
46 return ret == -ENODEV ? 0 : ret;
47 ops = pci_get_emul_ops(emul);
48 if (!ops || !ops->read_config)
49 return -ENOSYS;
50
51 return ops->read_config(emul, offset, valuep, size);
52}
53
Simon Glass537849a2015-03-05 12:25:27 -070054static const struct dm_pci_ops sandbox_pci_ops = {
55 .read_config = sandbox_pci_read_config,
56 .write_config = sandbox_pci_write_config,
57};
58
59static const struct udevice_id sandbox_pci_ids[] = {
60 { .compatible = "sandbox,pci" },
61 { }
62};
63
64U_BOOT_DRIVER(pci_sandbox) = {
65 .name = "pci_sandbox",
66 .id = UCLASS_PCI,
67 .of_match = sandbox_pci_ids,
68 .ops = &sandbox_pci_ops,
Simon Glass91195482016-07-05 17:10:10 -060069
70 /* Attach an emulator if we can */
71 .child_post_bind = dm_scan_fdt_dev,
Simon Glass537849a2015-03-05 12:25:27 -070072 .per_child_platdata_auto_alloc_size =
73 sizeof(struct pci_child_platdata),
74};