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

source/bootloader/u-boot-2020.01/board/freescale/common/cds_pci_ft.c

@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2004 Freescale Semiconductor.
+ */
+
+#include <common.h>
+#include <linux/libfdt.h>
+#include <fdt_support.h>
+#include "cadmus.h"
+
+#if defined(CONFIG_OF_BOARD_SETUP)
+#if defined(CONFIG_PCI) && !defined(CONFIG_DM_PCI)
+static void cds_pci_fixup(void *blob)
+{
+	int node;
+	const char *path;
+	int len, slot, i;
+	u32 *map = NULL, *piccells = NULL;
+	int off, cells;
+
+	node = fdt_path_offset(blob, "/aliases");
+	if (node >= 0) {
+		path = fdt_getprop(blob, node, "pci0", NULL);
+		if (path) {
+			node = fdt_path_offset(blob, path);
+			if (node >= 0) {
+				map = fdt_getprop_w(blob, node, "interrupt-map", &len);
+			}
+			/* Each item in "interrupt-map" property is translated with
+			 * following cells:
+			 * PCI #address-cells, PCI #interrupt-cells,
+			 * PIC address, PIC #address-cells, PIC #interrupt-cells.
+			 */
+			cells = fdt_getprop_u32_default(blob, path, "#address-cells", 1);
+			cells += fdt_getprop_u32_default(blob, path, "#interrupt-cells", 1);
+			off = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*(map+cells)));
+			if (off <= 0)
+				return;
+			cells += 1;
+			piccells = (u32 *)fdt_getprop(blob, off, "#address-cells", NULL);
+			if (piccells == NULL)
+				return;
+			cells += *piccells;
+			piccells = (u32 *)fdt_getprop(blob, off, "#interrupt-cells", NULL);
+			if (piccells == NULL)
+				return;
+			cells += *piccells;
+		}
+	}
+
+	if (map) {
+		len /= sizeof(u32);
+
+		slot = get_pci_slot();
+
+		for (i=0;i<len;i+=cells) {
+			/* We rotate the interrupt pins so that the mapping
+			 * changes depending on the slot the carrier card is in.
+			 */
+			map[3] = ((map[3] + slot - 2) % 4) + 1;
+			map+=cells;
+		}
+	}
+}
+#endif
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+	ft_cpu_setup(blob, bd);
+#if defined(CONFIG_PCI) && !defined(CONFIG_DM_PCI)
+	ft_pci_setup(blob, bd);
+	cds_pci_fixup(blob);
+#endif
+
+	return 0;
+}
+#endif