1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2004 Freescale Semiconductor.
4 */
5
6 #include <common.h>
7 #include <linux/libfdt.h>
8 #include <fdt_support.h>
9 #include "cadmus.h"
10
11 #if defined(CONFIG_OF_BOARD_SETUP)
12 #if defined(CONFIG_PCI) && !defined(CONFIG_DM_PCI)
cds_pci_fixup(void * blob)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 #endif
66
ft_board_setup(void * blob,struct bd_info * bd)67 int ft_board_setup(void *blob, struct bd_info *bd)
68 {
69 ft_cpu_setup(blob, bd);
70 #if defined(CONFIG_PCI) && !defined(CONFIG_DM_PCI)
71 ft_pci_setup(blob, bd);
72 cds_pci_fixup(blob);
73 #endif
74
75 return 0;
76 }
77 #endif
78