board/freescale/common/cds_pci_ft.c

   1 /*
   2  * Copyright 2004 Freescale Semiconductor.
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <common.h>
  24 #include <libfdt.h>
  25 #include <fdt_support.h>
  26 #include "cadmus.h"
  27
  28 #if defined(CONFIG_OF_BOARD_SETUP)
  29 static void cds_pci_fixup(void *blob)
  30 {
  31         int node;
  32         const char *path;
  33         int len, slot, i;
  34         u32 *map = NULL, *piccells = NULL;
  35         int off, cells;
  36
  37         node = fdt_path_offset(blob, "/aliases");
  38         if (node >= 0) {
  39                 path = fdt_getprop(blob, node, "pci0", NULL);
  40                 if (path) {
  41                         node = fdt_path_offset(blob, path);
  42                         if (node >= 0) {
  43                                 map = fdt_getprop_w(blob, node, "interrupt-map", &len);
  44                         }
  45                         /* Each item in "interrupt-map" property is translated with
  46                          * following cells:
  47                          * PCI #address-cells, PCI #interrupt-cells,
  48                          * PIC address, PIC #address-cells, PIC #interrupt-cells.
  49                          */
  50                         cells = fdt_getprop_u32_default(blob, path, "#address-cells", 1);
  51                         cells += fdt_getprop_u32_default(blob, path, "#interrupt-cells", 1);
  52                         off = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*(map+cells)));
  53                         if (off <= 0)
  54                                 return;
  55                         cells += 1;
  56                         piccells = (u32 *)fdt_getprop(blob, off, "#address-cells", NULL);
  57                         if (piccells == NULL)
  58                                 return;
  59                         cells += *piccells;
  60                         piccells = (u32 *)fdt_getprop(blob, off, "#interrupt-cells", NULL);
  61                         if (piccells == NULL)
  62                                 return;
  63                         cells += *piccells;
  64                 }
  65         }
  66
  67         if (map) {
  68                 len /= sizeof(u32);
  69
  70                 slot = get_pci_slot();
  71
  72                 for (i=0;i<len;i+=cells) {
  73                         /* We rotate the interrupt pins so that the mapping
  74                          * changes depending on the slot the carrier card is in.
  75                          */
  76                         map[3] = ((map[3] + slot - 2) % 4) + 1;
  77                         map+=cells;
  78                 }
  79         }
  80 }
  81
  82 void
  83 ft_board_setup(void *blob, bd_t *bd)
  84 {
  85         ft_cpu_setup(blob, bd);
  86 #ifdef CONFIG_PCI
  87         ft_pci_setup(blob, bd);
  88         cds_pci_fixup(blob);
  89 #endif
  90 }
  91 #endif