cpu/ppc4xx/fdt.c

   1 /*
   2  * (C) Copyright 2007-2008
   3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <watchdog.h>
  26 #include <command.h>
  27 #include <asm/cache.h>
  28 #include <ppc4xx.h>
  29
  30 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
  31 #include <libfdt.h>
  32 #include <libfdt_env.h>
  33 #include <fdt_support.h>
  34 #include <asm/4xx_pcie.h>
  35
  36 DECLARE_GLOBAL_DATA_PTR;
  37
  38 void __ft_board_setup(void *blob, bd_t *bd)
  39 {
  40         u32 val[4];
  41         int rc;
  42
  43         ft_cpu_setup(blob, bd);
  44
  45         /* Fixup NOR mapping */
  46         val[0] = 0;                             /* chip select number */
  47         val[1] = 0;                             /* always 0 */
  48         val[2] = gd->bd->bi_flashstart;
  49         val[3] = gd->bd->bi_flashsize;
  50         rc = fdt_find_and_setprop(blob, "/plb/opb/ebc", "ranges",
  51                                   val, sizeof(val), 1);
  52         if (rc)
  53                 printf("Unable to update property NOR mapping, err=%s\n",
  54                        fdt_strerror(rc));
  55 }
  56 void ft_board_setup(void *blob, bd_t *bd) __attribute__((weak, alias("__ft_board_setup")));
  57
  58 /*
  59  * Fixup all PCIe nodes by setting the device_type property
  60  * to "pci-endpoint" instead is "pci" for endpoint ports.
  61  * This property will get checked later by the Linux driver
  62  * to properly configure the PCIe port in Linux (again).
  63  */
  64 void fdt_pcie_setup(void *blob)
  65 {
  66         const char *compat = "ibm,plb-pciex";
  67         const char *prop = "device_type";
  68         const char *prop_val = "pci-endpoint";
  69         const u32 *port;
  70         int no;
  71         int rc;
  72
  73         /* Search first PCIe node */
  74         no = fdt_node_offset_by_compatible(blob, -1, compat);
  75         while (no != -FDT_ERR_NOTFOUND) {
  76                 port = fdt_getprop(blob, no, "port", NULL);
  77                 if (port == NULL) {
  78                         printf("WARNING: could not find port property\n");
  79                 } else {
  80                         if (is_end_point(*port)) {
  81                                 rc = fdt_setprop(blob, no, prop, prop_val,
  82                                                  strlen(prop_val) + 1);
  83                                 if (rc < 0)
  84                                         printf("WARNING: could not set %s for %s: %s.\n",
  85                                                prop, compat, fdt_strerror(rc));
  86                         }
  87                 }
  88
  89                 /* Jump to next PCIe node */
  90                 no = fdt_node_offset_by_compatible(blob, no, compat);
  91         }
  92 }
  93
  94 void ft_cpu_setup(void *blob, bd_t *bd)
  95 {
  96         sys_info_t sys_info;
  97
  98         get_sys_info(&sys_info);
  99
 100         do_fixup_by_prop_u32(blob, "device_type", "cpu", 4, "timebase-frequency",
 101                              bd->bi_intfreq, 1);
 102         do_fixup_by_prop_u32(blob, "device_type", "cpu", 4, "clock-frequency",
 103                              bd->bi_intfreq, 1);
 104         do_fixup_by_path_u32(blob, "/plb", "clock-frequency", sys_info.freqPLB, 1);
 105         do_fixup_by_path_u32(blob, "/plb/opb", "clock-frequency", sys_info.freqOPB, 1);
 106
 107         if (fdt_path_offset(blob, "/plb/opb/ebc") >= 0)
 108                 do_fixup_by_path_u32(blob, "/plb/opb/ebc", "clock-frequency",
 109                         sys_info.freqEBC, 1);
 110         else
 111                 do_fixup_by_path_u32(blob, "/plb/ebc", "clock-frequency",
 112                         sys_info.freqEBC, 1);
 113
 114         fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
 115
 116         /*
 117          * Setup all baudrates for the UARTs
 118          */
 119         do_fixup_by_compat_u32(blob, "ns16550", "clock-frequency", gd->uart_clk, 1);
 120
 121         /*
 122          * Fixup all ethernet nodes
 123          * Note: aliases in the dts are required for this
 124          */
 125         fdt_fixup_ethernet(blob, bd);
 126
 127         /*
 128          * Fixup all available PCIe nodes by setting the device_type property
 129          */
 130         fdt_pcie_setup(blob);
 131 }
 132 #endif /* CONFIG_OF_LIBFDT && CONFIG_OF_BOARD_SETUP */