nand_spl/board/freescale/p1_p2_rdb/nand_boot.c

   1 /*
   2  * Copyright 2009 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6 #include <common.h>
   7 #include <mpc85xx.h>
   8 #include <asm/io.h>
   9 #include <ns16550.h>
  10 #include <nand.h>
  11 #include <asm/mmu.h>
  12 #include <asm/immap_85xx.h>
  13 #include <asm/fsl_ddr_sdram.h>
  14 #include <asm/fsl_law.h>
  15
  16 #define SYSCLK_MASK     0x00200000
  17 #define BOARDREV_MASK   0x10100000
  18 #define BOARDREV_B      0x10100000
  19 #define BOARDREV_C      0x00100000
  20
  21 #define SYSCLK_66       66666666
  22 #define SYSCLK_50       50000000
  23 #define SYSCLK_100      100000000
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 void board_init_f(ulong bootflag)
  28 {
  29         uint plat_ratio, bus_clk, sys_clk = 0;
  30         volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
  31         volatile ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
  32         uint val, temp, sysclk_mask;
  33
  34         val = pgpio->gpdat;
  35         sysclk_mask = val & SYSCLK_MASK;
  36         temp = val & BOARDREV_MASK;
  37         if (temp == BOARDREV_C) {
  38                 if(sysclk_mask == 0)
  39                         sys_clk = SYSCLK_66;
  40                 else
  41                         sys_clk = SYSCLK_100;
  42         } else if (temp == BOARDREV_B) {
  43                 if(sysclk_mask == 0)
  44                         sys_clk = SYSCLK_66;
  45                 else
  46                         sys_clk = SYSCLK_50;
  47         }
  48
  49         plat_ratio = gur->porpllsr & 0x0000003e;
  50         plat_ratio >>= 1;
  51         bus_clk = plat_ratio * sys_clk;
  52         NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
  53                         bus_clk / 16 / CONFIG_BAUDRATE);
  54
  55         puts("\nNAND boot... ");
  56
  57         /* copy code to DDR and jump to it - this should not return */
  58         /* NOTE - code has to be copied out of NAND buffer before
  59          * other blocks can be read.
  60          */
  61         relocate_code(CONFIG_SYS_NAND_U_BOOT_RELOC_SP, 0,
  62                         CONFIG_SYS_NAND_U_BOOT_RELOC);
  63 }
  64
  65 void board_init_r(gd_t *gd, ulong dest_addr)
  66 {
  67         nand_boot();
  68 }
  69
  70 void putc(char c)
  71 {
  72         if (c == '\n')
  73                 NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, '\r');
  74
  75         NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, c);
  76 }
  77
  78 void puts(const char *str)
  79 {
  80         while (*str)
  81                 putc(*str++);
  82 }