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 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 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