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