133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#include <common.h>
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#include <dm.h>
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#include <fdtdec.h>
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#include <log.h>
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#include <linux/libfdt.h>
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#include <pci.h>
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#include <dm/lists.h>
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struct sandbox_pci_emul_priv {
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int dev_count;
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};
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int sandbox_pci_get_emul(const struct udevice *bus, pci_dev_t find_devfn,
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struct udevice **containerp, struct udevice **emulp)
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{
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struct pci_emul_uc_priv *upriv;
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struct udevice *dev;
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int ret;
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*containerp = NULL;
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ret = pci_bus_find_devfn(bus, PCI_MASK_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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*containerp = dev;
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ret = uclass_get_device_by_phandle(UCLASS_PCI_EMUL, dev, "sandbox,emul",
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emulp);
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if (!ret) {
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upriv = dev_get_uclass_priv(*emulp);
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upriv->client = dev;
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} else if (device_get_uclass_id(dev) != UCLASS_PCI_GENERIC) {
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/*
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* See commit 4345998ae9df,
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* "pci: sandbox: Support dynamically binding device driver"
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*/
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*emulp = dev;
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}
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return 0;
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}
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int sandbox_pci_get_client(struct udevice *emul, struct udevice **devp)
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{
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struct pci_emul_uc_priv *upriv = dev_get_uclass_priv(emul);
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if (!upriv->client)
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return -ENOENT;
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*devp = upriv->client;
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return 0;
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}
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uint sandbox_pci_read_bar(u32 barval, int type, uint size)
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{
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u32 result;
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result = barval;
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if (result == 0xffffffff) {
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if (type == PCI_BASE_ADDRESS_SPACE_IO) {
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result = (~(size - 1) &
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PCI_BASE_ADDRESS_IO_MASK) |
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PCI_BASE_ADDRESS_SPACE_IO;
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} else {
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result = (~(size - 1) &
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PCI_BASE_ADDRESS_MEM_MASK) |
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PCI_BASE_ADDRESS_MEM_TYPE_32;
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}
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}
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return result;
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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_emul_priv *priv = uclass_get_priv(dev->uclass);
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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_emul_priv *priv = uclass_get_priv(dev->uclass);
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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 = sizeof(struct sandbox_pci_emul_priv),
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.per_device_auto = sizeof(struct pci_emul_uc_priv),
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};
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/*
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* This uclass is a child of the pci bus. Its plat is not defined here so
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* is defined by its parent, UCLASS_PCI, which uses struct pci_child_plat.
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* See per_child_plat_auto in UCLASS_DRIVER(pci).
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*/
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UCLASS_DRIVER(pci_emul_parent) = {
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.id = UCLASS_PCI_EMUL_PARENT,
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.name = "pci_emul_parent",
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.post_bind = dm_scan_fdt_dev,
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};
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static const struct udevice_id pci_emul_parent_ids[] = {
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{ .compatible = "sandbox,pci-emul-parent" },
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{ }
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};
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U_BOOT_DRIVER(pci_emul_parent_drv) = {
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.name = "pci_emul_parent_drv",
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.id = UCLASS_PCI_EMUL_PARENT,
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.of_match = pci_emul_parent_ids,
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};
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