GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
21813 changed files with 4413081 additions and 0 deletions
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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 <linux/libfdt.h>
+#include <pci.h>
+#include <dm/lists.h>
+
+struct sandbox_pci_emul_priv {
+	int dev_count;
+};
+
+int sandbox_pci_get_emul(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,
+};