1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (c) 2014 Google, Inc
3*4882a593Smuzhiyun * Written by Simon Glass <sjg@chromium.org>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <dm.h>
10*4882a593Smuzhiyun #include <fdtdec.h>
11*4882a593Smuzhiyun #include <linux/libfdt.h>
12*4882a593Smuzhiyun #include <pci.h>
13*4882a593Smuzhiyun #include <dm/lists.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun struct sandbox_pci_priv {
18*4882a593Smuzhiyun int dev_count;
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
sandbox_pci_get_emul(struct udevice * bus,pci_dev_t find_devfn,struct udevice ** emulp)21*4882a593Smuzhiyun int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
22*4882a593Smuzhiyun struct udevice **emulp)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun struct udevice *dev;
25*4882a593Smuzhiyun int ret;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun ret = pci_bus_find_devfn(bus, find_devfn, &dev);
28*4882a593Smuzhiyun if (ret) {
29*4882a593Smuzhiyun debug("%s: Could not find emulator for dev %x\n", __func__,
30*4882a593Smuzhiyun find_devfn);
31*4882a593Smuzhiyun return ret;
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun ret = device_find_first_child(dev, emulp);
35*4882a593Smuzhiyun if (ret)
36*4882a593Smuzhiyun return ret;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun return *emulp ? 0 : -ENODEV;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
sandbox_pci_emul_post_probe(struct udevice * dev)41*4882a593Smuzhiyun static int sandbox_pci_emul_post_probe(struct udevice *dev)
42*4882a593Smuzhiyun {
43*4882a593Smuzhiyun struct sandbox_pci_priv *priv = dev->uclass->priv;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun priv->dev_count++;
46*4882a593Smuzhiyun sandbox_set_enable_pci_map(true);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun return 0;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
sandbox_pci_emul_pre_remove(struct udevice * dev)51*4882a593Smuzhiyun static int sandbox_pci_emul_pre_remove(struct udevice *dev)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun struct sandbox_pci_priv *priv = dev->uclass->priv;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun priv->dev_count--;
56*4882a593Smuzhiyun sandbox_set_enable_pci_map(priv->dev_count > 0);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun UCLASS_DRIVER(pci_emul) = {
62*4882a593Smuzhiyun .id = UCLASS_PCI_EMUL,
63*4882a593Smuzhiyun .name = "pci_emul",
64*4882a593Smuzhiyun .post_probe = sandbox_pci_emul_post_probe,
65*4882a593Smuzhiyun .pre_remove = sandbox_pci_emul_pre_remove,
66*4882a593Smuzhiyun .priv_auto_alloc_size = sizeof(struct sandbox_pci_priv),
67*4882a593Smuzhiyun };
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