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Simon Glass36d0d3b2015-03-05 12:25:28 -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 <libfdt.h>
12#include <pci.h>
13#include <dm/lists.h>
14
15DECLARE_GLOBAL_DATA_PTR;
16
17struct sandbox_pci_priv {
18 int dev_count;
19};
20
21int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
22 struct udevice **emulp)
23{
24 struct udevice *dev;
25 int ret;
26
27 ret = pci_bus_find_devfn(bus, find_devfn, &dev);
28 if (ret) {
29 debug("%s: Could not find emulator for dev %x\n", __func__,
30 find_devfn);
31 return ret;
32 }
33
34 ret = device_find_first_child(dev, emulp);
35 if (ret)
36 return ret;
37
38 return *emulp ? 0 : -ENODEV;
39}
40
41static int sandbox_pci_emul_post_probe(struct udevice *dev)
42{
43 struct sandbox_pci_priv *priv = dev->uclass->priv;
44
45 priv->dev_count++;
46 sandbox_set_enable_pci_map(true);
47
48 return 0;
49}
50
51static int sandbox_pci_emul_pre_remove(struct udevice *dev)
52{
53 struct sandbox_pci_priv *priv = dev->uclass->priv;
54
55 priv->dev_count--;
56 sandbox_set_enable_pci_map(priv->dev_count > 0);
57
58 return 0;
59}
60
61UCLASS_DRIVER(pci_emul) = {
62 .id = UCLASS_PCI_EMUL,
63 .name = "pci_emul",
64 .post_probe = sandbox_pci_emul_post_probe,
65 .pre_remove = sandbox_pci_emul_pre_remove,
66 .priv_auto_alloc_size = sizeof(struct sandbox_pci_priv),
67};