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