LXR uboot/board/amcc/ocotea/flash.c

   1/*
   2 * (C) Copyright 2004-2005
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
   6 * Add support for Am29F016D and dynamic switch setting.
   7 *
   8 * SPDX-License-Identifier:     GPL-2.0+
   9 */
  10
  11/*
  12 * Modified 4/5/2001
  13 * Wait for completion of each sector erase command issued
  14 * 4/5/2001
  15 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  16 */
  17
  18#include <common.h>
  19#include <asm/ppc4xx.h>
  20#include <asm/processor.h>
  21
  22#undef DEBUG
  23
  24#ifdef DEBUG
  25#define DEBUGF(x...) printf(x)
  26#else
  27#define DEBUGF(x...)
  28#endif                          /* DEBUG */
  29
  30#define     BOOT_SMALL_FLASH        0x40        /* 01000000 */
  31#define     FLASH_ONBD_N            2   /* 00000010 */
  32#define     FLASH_SRAM_SEL          1   /* 00000001 */
  33#define     FLASH_ONBD_N            2   /* 00000010 */
  34#define     FLASH_SRAM_SEL          1   /* 00000001 */
  35
  36#define     BOOT_SMALL_FLASH_VAL    4
  37#define     FLASH_ONBD_N_VAL        2
  38#define     FLASH_SRAM_SEL_VAL      1
  39
  40flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  41
  42static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
  43        {0xFF800000, 0xFF880000, 0xFFC00000},   /* 0:000: configuraton 4 */
  44        {0xFF900000, 0xFF980000, 0xFFC00000},   /* 1:001: configuraton 3 */
  45        {0x00000000, 0x00000000, 0x00000000},   /* 2:010: configuraton 8 */
  46        {0x00000000, 0x00000000, 0x00000000},   /* 3:011: configuraton 7 */
  47        {0xFFE00000, 0xFFF00000, 0xFF800000},   /* 4:100: configuraton 2 */
  48        {0xFFF00000, 0xFFF80000, 0xFF800000},   /* 5:101: configuraton 1 */
  49        {0x00000000, 0x00000000, 0x00000000},   /* 6:110: configuraton 6 */
  50        {0x00000000, 0x00000000, 0x00000000}    /* 7:111: configuraton 5 */
  51};
  52
  53/*
  54 * include common flash code (for amcc boards)
  55 */
  56#include "../common/flash.c"
  57
  58/*-----------------------------------------------------------------------
  59 * Functions
  60 */
  61static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  62static int write_word(flash_info_t * info, ulong dest, ulong data);
  63
  64/*-----------------------------------------------------------------------
  65 */
  66
  67unsigned long flash_init(void)
  68{
  69        unsigned long total_b = 0;
  70        unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  71        unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
  72        unsigned char switch_status;
  73        unsigned short index = 0;
  74        int i;
  75
  76        /* read FPGA base register FPGA_REG0 */
  77        switch_status = *fpga_base;
  78
  79        /* check the bitmap of switch status */
  80        if (switch_status & BOOT_SMALL_FLASH) {
  81                index += BOOT_SMALL_FLASH_VAL;
  82        }
  83        if (switch_status & FLASH_ONBD_N) {
  84                index += FLASH_ONBD_N_VAL;
  85        }
  86        if (switch_status & FLASH_SRAM_SEL) {
  87                index += FLASH_SRAM_SEL_VAL;
  88        }
  89
  90        DEBUGF("\n");
  91        DEBUGF("FLASH: Index: %d\n", index);
  92
  93        /* Init: no FLASHes known */
  94        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  95                flash_info[i].flash_id = FLASH_UNKNOWN;
  96                flash_info[i].sector_count = -1;
  97                flash_info[i].size = 0;
  98
  99                /* check whether the address is 0 */
 100                if (flash_addr_table[index][i] == 0) {
 101                        continue;
 102                }
 103
 104                /* call flash_get_size() to initialize sector address */
 105                size_b[i] =
 106                    flash_get_size((vu_long *) flash_addr_table[index][i],
 107                                   &flash_info[i]);
 108                flash_info[i].size = size_b[i];
 109                if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 110                        printf
 111                            ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 112                             i, size_b[i], size_b[i] << 20);
 113                        flash_info[i].sector_count = -1;
 114                        flash_info[i].size = 0;
 115                }
 116
 117                /* Monitor protection ON by default */
 118                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 119                                    CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 120                                    &flash_info[i]);
 121#ifdef CONFIG_ENV_IS_IN_FLASH
 122                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 123                                    CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 124                                    &flash_info[i]);
 125                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 126                                    CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 127                                    &flash_info[i]);
 128#endif
 129
 130                total_b += flash_info[i].size;
 131        }
 132
 133        return total_b;
 134}
 135