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36d0d3b4b4
Since sandbox does not have real devices (unless it borrows those from the host) it must use emulations. Provide a uclass which permits PCI operations to be passed through to an emulation device. Signed-off-by: Simon Glass <sjg@chromium.org>
68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
/*
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* Copyright (c) 2014 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <libfdt.h>
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#include <pci.h>
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#include <dm/lists.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct sandbox_pci_priv {
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int dev_count;
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};
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int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
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struct udevice **emulp)
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{
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struct udevice *dev;
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int ret;
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ret = pci_bus_find_devfn(bus, find_devfn, &dev);
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if (ret) {
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debug("%s: Could not find emulator for dev %x\n", __func__,
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find_devfn);
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return ret;
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}
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ret = device_find_first_child(dev, emulp);
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if (ret)
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return ret;
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return *emulp ? 0 : -ENODEV;
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}
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static int sandbox_pci_emul_post_probe(struct udevice *dev)
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{
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struct sandbox_pci_priv *priv = dev->uclass->priv;
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priv->dev_count++;
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sandbox_set_enable_pci_map(true);
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return 0;
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}
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static int sandbox_pci_emul_pre_remove(struct udevice *dev)
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{
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struct sandbox_pci_priv *priv = dev->uclass->priv;
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priv->dev_count--;
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sandbox_set_enable_pci_map(priv->dev_count > 0);
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return 0;
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}
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UCLASS_DRIVER(pci_emul) = {
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.id = UCLASS_PCI_EMUL,
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.name = "pci_emul",
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.post_probe = sandbox_pci_emul_post_probe,
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.pre_remove = sandbox_pci_emul_pre_remove,
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.priv_auto_alloc_size = sizeof(struct sandbox_pci_priv),
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};
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