1 /*
2  * Copyright 2004 Freescale Semiconductor.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <linux/libfdt.h>
9 #include <fdt_support.h>
10 #include "cadmus.h"
11 
12 #if defined(CONFIG_OF_BOARD_SETUP)
13 static void cds_pci_fixup(void *blob)
14 {
15 	int node;
16 	const char *path;
17 	int len, slot, i;
18 	u32 *map = NULL, *piccells = NULL;
19 	int off, cells;
20 
21 	node = fdt_path_offset(blob, "/aliases");
22 	if (node >= 0) {
23 		path = fdt_getprop(blob, node, "pci0", NULL);
24 		if (path) {
25 			node = fdt_path_offset(blob, path);
26 			if (node >= 0) {
27 				map = fdt_getprop_w(blob, node, "interrupt-map", &len);
28 			}
29 			/* Each item in "interrupt-map" property is translated with
30 			 * following cells:
31 			 * PCI #address-cells, PCI #interrupt-cells,
32 			 * PIC address, PIC #address-cells, PIC #interrupt-cells.
33 			 */
34 			cells = fdt_getprop_u32_default(blob, path, "#address-cells", 1);
35 			cells += fdt_getprop_u32_default(blob, path, "#interrupt-cells", 1);
36 			off = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*(map+cells)));
37 			if (off <= 0)
38 				return;
39 			cells += 1;
40 			piccells = (u32 *)fdt_getprop(blob, off, "#address-cells", NULL);
41 			if (piccells == NULL)
42 				return;
43 			cells += *piccells;
44 			piccells = (u32 *)fdt_getprop(blob, off, "#interrupt-cells", NULL);
45 			if (piccells == NULL)
46 				return;
47 			cells += *piccells;
48 		}
49 	}
50 
51 	if (map) {
52 		len /= sizeof(u32);
53 
54 		slot = get_pci_slot();
55 
56 		for (i=0;i<len;i+=cells) {
57 			/* We rotate the interrupt pins so that the mapping
58 			 * changes depending on the slot the carrier card is in.
59 			 */
60 			map[3] = ((map[3] + slot - 2) % 4) + 1;
61 			map+=cells;
62 		}
63 	}
64 }
65 
66 int ft_board_setup(void *blob, bd_t *bd)
67 {
68 	ft_cpu_setup(blob, bd);
69 #ifdef CONFIG_PCI
70 	ft_pci_setup(blob, bd);
71 	cds_pci_fixup(blob);
72 #endif
73 
74 	return 0;
75 }
76 #endif
77