release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/boot/cuboot-hotfoot.c

   1 /*
   2  * Old U-boot compatibility for Esteem 195E Hotfoot CPU Board
   3  *
   4  * Author: Solomon Peachy <solomon@linux-wlan.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  */
  10
  11 #include "ops.h"
  12 #include "stdio.h"
  13 #include "reg.h"
  14 #include "dcr.h"
  15 #include "4xx.h"
  16 #include "cuboot.h"
  17
  18 #define TARGET_4xx
  19 #define TARGET_HOTFOOT
  20
  21 #include "ppcboot-hotfoot.h"
  22
  23 static bd_t bd;
  24
  25 #define NUM_REGS 3
  26
  27 static void hotfoot_fixups(void)
  28 {
  29         u32 uart = mfdcr(DCRN_CPC0_UCR) & 0x7f;
  30
  31         dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  32
  33         dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_procfreq, 0);
  34         dt_fixup_clock("/plb", bd.bi_plb_busfreq);
  35         dt_fixup_clock("/plb/opb", bd.bi_opbfreq);
  36         dt_fixup_clock("/plb/ebc", bd.bi_pci_busfreq);
  37         dt_fixup_clock("/plb/opb/serial@ef600300", bd.bi_procfreq / uart);
  38         dt_fixup_clock("/plb/opb/serial@ef600400", bd.bi_procfreq / uart);
  39
  40         dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
  41         dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr);
  42
  43         /* Is this a single eth/serial board? */
  44         if ((bd.bi_enet1addr[0] == 0) &&
  45             (bd.bi_enet1addr[1] == 0) &&
  46             (bd.bi_enet1addr[2] == 0) &&
  47             (bd.bi_enet1addr[3] == 0) &&
  48             (bd.bi_enet1addr[4] == 0) &&
  49             (bd.bi_enet1addr[5] == 0)) {
  50                 void *devp;
  51
  52                 printf("Trimming devtree for single serial/eth board\n");
  53
  54                 devp = finddevice("/plb/opb/serial@ef600300");
  55                 if (!devp)
  56                         fatal("Can't find node for /plb/opb/serial@ef600300");
  57                 del_node(devp);
  58
  59                 devp = finddevice("/plb/opb/ethernet@ef600900");
  60                 if (!devp)
  61                         fatal("Can't find node for /plb/opb/ethernet@ef600900");
  62                 del_node(devp);
  63         }
  64
  65         ibm4xx_quiesce_eth((u32 *)0xef600800, (u32 *)0xef600900);
  66
  67         /* Fix up flash size in fdt for 4M boards. */
  68         if (bd.bi_flashsize < 0x800000) {
  69                 u32 regs[NUM_REGS];
  70                 void *devp = finddevice("/plb/ebc/nor_flash@0");
  71                 if (!devp)
  72                         fatal("Can't find FDT node for nor_flash!??");
  73
  74                 printf("Fixing devtree for 4M Flash\n");
  75
  76                 /* First fix up the base addresse */
  77                 getprop(devp, "reg", regs, sizeof(regs));
  78                 regs[0] = 0;
  79                 regs[1] = 0xffc00000;
  80                 regs[2] = 0x00400000;
  81                 setprop(devp, "reg", regs, sizeof(regs));
  82
  83                 /* Then the offsets */
  84                 devp = finddevice("/plb/ebc/nor_flash@0/partition@0");
  85                 if (!devp)
  86                         fatal("Can't find FDT node for partition@0");
  87                 getprop(devp, "reg", regs, 2*sizeof(u32));
  88                 regs[0] -= 0x400000;
  89                 setprop(devp, "reg", regs,  2*sizeof(u32));
  90
  91                 devp = finddevice("/plb/ebc/nor_flash@0/partition@1");
  92                 if (!devp)
  93                         fatal("Can't find FDT node for partition@1");
  94                 getprop(devp, "reg", regs, 2*sizeof(u32));
  95                 regs[0] -= 0x400000;
  96                 setprop(devp, "reg", regs,  2*sizeof(u32));
  97
  98                 devp = finddevice("/plb/ebc/nor_flash@0/partition@2");
  99                 if (!devp)
 100                         fatal("Can't find FDT node for partition@2");
 101                 getprop(devp, "reg", regs, 2*sizeof(u32));
 102                 regs[0] -= 0x400000;
 103                 setprop(devp, "reg", regs,  2*sizeof(u32));
 104
 105                 devp = finddevice("/plb/ebc/nor_flash@0/partition@3");
 106                 if (!devp)
 107                         fatal("Can't find FDT node for partition@3");
 108                 getprop(devp, "reg", regs, 2*sizeof(u32));
 109                 regs[0] -= 0x400000;
 110                 setprop(devp, "reg", regs,  2*sizeof(u32));
 111
 112                 devp = finddevice("/plb/ebc/nor_flash@0/partition@4");
 113                 if (!devp)
 114                         fatal("Can't find FDT node for partition@4");
 115                 getprop(devp, "reg", regs, 2*sizeof(u32));
 116                 regs[0] -= 0x400000;
 117                 setprop(devp, "reg", regs,  2*sizeof(u32));
 118
 119                 devp = finddevice("/plb/ebc/nor_flash@0/partition@6");
 120                 if (!devp)
 121                         fatal("Can't find FDT node for partition@6");
 122                 getprop(devp, "reg", regs, 2*sizeof(u32));
 123                 regs[0] -= 0x400000;
 124                 setprop(devp, "reg", regs,  2*sizeof(u32));
 125
 126                 /* Delete the FeatFS node */
 127                 devp = finddevice("/plb/ebc/nor_flash@0/partition@5");
 128                 if (!devp)
 129                         fatal("Can't find FDT node for partition@5");
 130                 del_node(devp);
 131         }
 132 }
 133
 134 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 135                    unsigned long r6, unsigned long r7)
 136 {
 137         CUBOOT_INIT();
 138         platform_ops.fixups = hotfoot_fixups;
 139         platform_ops.exit = ibm40x_dbcr_reset;
 140         fdt_init(_dtb_start);
 141         serial_console_init();
 142 }