nand_spl/board/freescale/mpc8536ds/nand_boot.c

   1 /*
   2  * Copyright 2009 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <ns16550.h>
   9 #include <asm/io.h>
  10 #include <nand.h>
  11
  12 u32 sysclk_tbl[] = {
  13         33333000, 39999600, 49999500, 66666000,
  14         83332500, 99999000, 133332000, 166665000
  15 };
  16
  17 void board_init_f(ulong bootflag)
  18 {
  19         int px_spd;
  20         u32 plat_ratio, bus_clk, sys_clk;
  21         ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
  22
  23 #if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
  24         /* for FPGA */
  25         set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
  26         set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
  27 #else
  28 #error CONFIG_SYS_BR3_PRELIM, CONFIG_SYS_OR3_PRELIM must be defined
  29 #endif
  30
  31         /* initialize selected port with appropriate baud rate */
  32         px_spd = in_8((unsigned char *)(PIXIS_BASE + PIXIS_SPD));
  33         sys_clk = sysclk_tbl[px_spd & PIXIS_SPD_SYSCLK];
  34         plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
  35         bus_clk = sys_clk * plat_ratio / 2;
  36
  37         NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
  38                         bus_clk / 16 / CONFIG_BAUDRATE);
  39
  40         puts("\nNAND boot... ");
  41
  42         /* copy code to RAM and jump to it - this should not return */
  43         /* NOTE - code has to be copied out of NAND buffer before
  44          * other blocks can be read.
  45          */
  46         relocate_code(CONFIG_SYS_NAND_U_BOOT_RELOC_SP, 0,
  47                         CONFIG_SYS_NAND_U_BOOT_RELOC);
  48 }
  49
  50 void board_init_r(gd_t *gd, ulong dest_addr)
  51 {
  52         nand_boot();
  53 }
  54
  55 void putc(char c)
  56 {
  57         if (c == '\n')
  58                 NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, '\r');
  59
  60         NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, c);
  61 }
  62
  63 void puts(const char *str)
  64 {
  65         while (*str)
  66                 putc(*str++);
  67 }