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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2014 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #include <common.h>
- #include <dm.h>
- #include <fdtdec.h>
- #include <log.h>
- #include <linux/libfdt.h>
- #include <pci.h>
- #include <dm/lists.h>
- struct sandbox_pci_emul_priv {
- int dev_count;
- };
- int sandbox_pci_get_emul(const struct udevice *bus, pci_dev_t find_devfn,
- struct udevice **containerp, struct udevice **emulp)
- {
- struct pci_emul_uc_priv *upriv;
- struct udevice *dev;
- int ret;
- *containerp = NULL;
- ret = pci_bus_find_devfn(bus, PCI_MASK_BUS(find_devfn), &dev);
- if (ret) {
- debug("%s: Could not find emulator for dev %x\n", __func__,
- find_devfn);
- return ret;
- }
- *containerp = dev;
- ret = uclass_get_device_by_phandle(UCLASS_PCI_EMUL, dev, "sandbox,emul",
- emulp);
- if (!ret) {
- upriv = dev_get_uclass_priv(*emulp);
- upriv->client = dev;
- } else if (device_get_uclass_id(dev) != UCLASS_PCI_GENERIC) {
- /*
- * See commit 4345998ae9df,
- * "pci: sandbox: Support dynamically binding device driver"
- */
- *emulp = dev;
- }
- return 0;
- }
- int sandbox_pci_get_client(struct udevice *emul, struct udevice **devp)
- {
- struct pci_emul_uc_priv *upriv = dev_get_uclass_priv(emul);
- if (!upriv->client)
- return -ENOENT;
- *devp = upriv->client;
- return 0;
- }
- uint sandbox_pci_read_bar(u32 barval, int type, uint size)
- {
- u32 result;
- result = barval;
- if (result == 0xffffffff) {
- if (type == PCI_BASE_ADDRESS_SPACE_IO) {
- result = (~(size - 1) &
- PCI_BASE_ADDRESS_IO_MASK) |
- PCI_BASE_ADDRESS_SPACE_IO;
- } else {
- result = (~(size - 1) &
- PCI_BASE_ADDRESS_MEM_MASK) |
- PCI_BASE_ADDRESS_MEM_TYPE_32;
- }
- }
- return result;
- }
- static int sandbox_pci_emul_post_probe(struct udevice *dev)
- {
- struct sandbox_pci_emul_priv *priv = dev->uclass->priv;
- priv->dev_count++;
- sandbox_set_enable_pci_map(true);
- return 0;
- }
- static int sandbox_pci_emul_pre_remove(struct udevice *dev)
- {
- struct sandbox_pci_emul_priv *priv = dev->uclass->priv;
- priv->dev_count--;
- sandbox_set_enable_pci_map(priv->dev_count > 0);
- return 0;
- }
- UCLASS_DRIVER(pci_emul) = {
- .id = UCLASS_PCI_EMUL,
- .name = "pci_emul",
- .post_probe = sandbox_pci_emul_post_probe,
- .pre_remove = sandbox_pci_emul_pre_remove,
- .priv_auto_alloc_size = sizeof(struct sandbox_pci_emul_priv),
- .per_device_auto_alloc_size = sizeof(struct pci_emul_uc_priv),
- };
- /*
- * This uclass is a child of the pci bus. Its platdata is not defined here so
- * is defined by its parent, UCLASS_PCI, which uses struct pci_child_platdata.
- * See per_child_platdata_auto_alloc_size in UCLASS_DRIVER(pci).
- */
- UCLASS_DRIVER(pci_emul_parent) = {
- .id = UCLASS_PCI_EMUL_PARENT,
- .name = "pci_emul_parent",
- .post_bind = dm_scan_fdt_dev,
- };
- static const struct udevice_id pci_emul_parent_ids[] = {
- { .compatible = "sandbox,pci-emul-parent" },
- { }
- };
- U_BOOT_DRIVER(pci_emul_parent_drv) = {
- .name = "pci_emul_parent_drv",
- .id = UCLASS_PCI_EMUL_PARENT,
- .of_match = pci_emul_parent_ids,
- };
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