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