arch/powerpc/boot/cuboot-hotfoot.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Old U-boot compatibility for Esteem 195E Hotfoot CPU Board
   4  *
   5  * Author: Solomon Peachy <solomon@linux-wlan.com>
   6  */
   7
   8 #include "ops.h"
   9 #include "stdio.h"
  10 #include "reg.h"
  11 #include "dcr.h"
  12 #include "4xx.h"
  13 #include "cuboot.h"
  14
  15 #define TARGET_4xx
  16 #define TARGET_HOTFOOT
  17
  18 #include "ppcboot-hotfoot.h"
  19
  20 static bd_t bd;
  21
  22 #define NUM_REGS 3
  23
  24 static void hotfoot_fixups(void)
  25 {
  26         u32 uart = mfdcr(DCRN_CPC0_UCR) & 0x7f;
  27
  28         dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
  29
  30         dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_procfreq, 0);
  31         dt_fixup_clock("/plb", bd.bi_plb_busfreq);
  32         dt_fixup_clock("/plb/opb", bd.bi_opbfreq);
  33         dt_fixup_clock("/plb/ebc", bd.bi_pci_busfreq);
  34         dt_fixup_clock("/plb/opb/serial@ef600300", bd.bi_procfreq / uart);
  35         dt_fixup_clock("/plb/opb/serial@ef600400", bd.bi_procfreq / uart);
  36
  37         dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
  38         dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr);
  39
  40         /* Is this a single eth/serial board? */
  41         if ((bd.bi_enet1addr[0] == 0) &&
  42             (bd.bi_enet1addr[1] == 0) &&
  43             (bd.bi_enet1addr[2] == 0) &&
  44             (bd.bi_enet1addr[3] == 0) &&
  45             (bd.bi_enet1addr[4] == 0) &&
  46             (bd.bi_enet1addr[5] == 0)) {
  47                 void *devp;
  48
  49                 printf("Trimming devtree for single serial/eth board\n");
  50
  51                 devp = finddevice("/plb/opb/serial@ef600300");
  52                 if (!devp)
  53                         fatal("Can't find node for /plb/opb/serial@ef600300");
  54                 del_node(devp);
  55
  56                 devp = finddevice("/plb/opb/ethernet@ef600900");
  57                 if (!devp)
  58                         fatal("Can't find node for /plb/opb/ethernet@ef600900");
  59                 del_node(devp);
  60         }
  61
  62         ibm4xx_quiesce_eth((u32 *)0xef600800, (u32 *)0xef600900);
  63
  64         /* Fix up flash size in fdt for 4M boards. */
  65         if (bd.bi_flashsize < 0x800000) {
  66                 u32 regs[NUM_REGS];
  67                 void *devp = finddevice("/plb/ebc/nor_flash@0");
  68                 if (!devp)
  69                         fatal("Can't find FDT node for nor_flash!??");
  70
  71                 printf("Fixing devtree for 4M Flash\n");
  72
  73                 /* First fix up the base addresse */
  74                 getprop(devp, "reg", regs, sizeof(regs));
  75                 regs[0] = 0;
  76                 regs[1] = 0xffc00000;
  77                 regs[2] = 0x00400000;
  78                 setprop(devp, "reg", regs, sizeof(regs));
  79
  80                 /* Then the offsets */
  81                 devp = finddevice("/plb/ebc/nor_flash@0/partition@0");
  82                 if (!devp)
  83                         fatal("Can't find FDT node for partition@0");
  84                 getprop(devp, "reg", regs, 2*sizeof(u32));
  85                 regs[0] -= 0x400000;
  86                 setprop(devp, "reg", regs,  2*sizeof(u32));
  87
  88                 devp = finddevice("/plb/ebc/nor_flash@0/partition@1");
  89                 if (!devp)
  90                         fatal("Can't find FDT node for partition@1");
  91                 getprop(devp, "reg", regs, 2*sizeof(u32));
  92                 regs[0] -= 0x400000;
  93                 setprop(devp, "reg", regs,  2*sizeof(u32));
  94
  95                 devp = finddevice("/plb/ebc/nor_flash@0/partition@2");
  96                 if (!devp)
  97                         fatal("Can't find FDT node for partition@2");
  98                 getprop(devp, "reg", regs, 2*sizeof(u32));
  99                 regs[0] -= 0x400000;
 100                 setprop(devp, "reg", regs,  2*sizeof(u32));
 101
 102                 devp = finddevice("/plb/ebc/nor_flash@0/partition@3");
 103                 if (!devp)
 104                         fatal("Can't find FDT node for partition@3");
 105                 getprop(devp, "reg", regs, 2*sizeof(u32));
 106                 regs[0] -= 0x400000;
 107                 setprop(devp, "reg", regs,  2*sizeof(u32));
 108
 109                 devp = finddevice("/plb/ebc/nor_flash@0/partition@4");
 110                 if (!devp)
 111                         fatal("Can't find FDT node for partition@4");
 112                 getprop(devp, "reg", regs, 2*sizeof(u32));
 113                 regs[0] -= 0x400000;
 114                 setprop(devp, "reg", regs,  2*sizeof(u32));
 115
 116                 devp = finddevice("/plb/ebc/nor_flash@0/partition@6");
 117                 if (!devp)
 118                         fatal("Can't find FDT node for partition@6");
 119                 getprop(devp, "reg", regs, 2*sizeof(u32));
 120                 regs[0] -= 0x400000;
 121                 setprop(devp, "reg", regs,  2*sizeof(u32));
 122
 123                 /* Delete the FeatFS node */
 124                 devp = finddevice("/plb/ebc/nor_flash@0/partition@5");
 125                 if (!devp)
 126                         fatal("Can't find FDT node for partition@5");
 127                 del_node(devp);
 128         }
 129 }
 130
 131 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 132                    unsigned long r6, unsigned long r7)
 133 {
 134         CUBOOT_INIT();
 135         platform_ops.fixups = hotfoot_fixups;
 136         platform_ops.exit = ibm40x_dbcr_reset;
 137         fdt_init(_dtb_start);
 138         serial_console_init();
 139 }