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 * See file CREDITS for list of people who contributed to this
   9 * project.
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License as
  13 * published by the Free Software Foundation; either version 2 of
  14 * the License, or (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24 * MA 02111-1307 USA
  25 */
  26
  27/*
  28 * Modified 4/5/2001
  29 * Wait for completion of each sector erase command issued
  30 * 4/5/2001
  31 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  32 */
  33
  34#include <common.h>
  35#include <asm/ppc4xx.h>
  36#include <asm/processor.h>
  37
  38#undef DEBUG
  39
  40#ifdef DEBUG
  41#define DEBUGF(x...) printf(x)
  42#else
  43#define DEBUGF(x...)
  44#endif                          /* DEBUG */
  45
  46#define     BOOT_SMALL_FLASH        0x40        /* 01000000 */
  47#define     FLASH_ONBD_N            2   /* 00000010 */
  48#define     FLASH_SRAM_SEL          1   /* 00000001 */
  49#define     FLASH_ONBD_N            2   /* 00000010 */
  50#define     FLASH_SRAM_SEL          1   /* 00000001 */
  51
  52#define     BOOT_SMALL_FLASH_VAL    4
  53#define     FLASH_ONBD_N_VAL        2
  54#define     FLASH_SRAM_SEL_VAL      1
  55
  56flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  57
  58static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
  59        {0xFF800000, 0xFF880000, 0xFFC00000},   /* 0:000: configuraton 4 */
  60        {0xFF900000, 0xFF980000, 0xFFC00000},   /* 1:001: configuraton 3 */
  61        {0x00000000, 0x00000000, 0x00000000},   /* 2:010: configuraton 8 */
  62        {0x00000000, 0x00000000, 0x00000000},   /* 3:011: configuraton 7 */
  63        {0xFFE00000, 0xFFF00000, 0xFF800000},   /* 4:100: configuraton 2 */
  64        {0xFFF00000, 0xFFF80000, 0xFF800000},   /* 5:101: configuraton 1 */
  65        {0x00000000, 0x00000000, 0x00000000},   /* 6:110: configuraton 6 */
  66        {0x00000000, 0x00000000, 0x00000000}    /* 7:111: configuraton 5 */
  67};
  68
  69/*
  70 * include common flash code (for amcc boards)
  71 */
  72#include "../common/flash.c"
  73
  74/*-----------------------------------------------------------------------
  75 * Functions
  76 */
  77static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  78static int write_word(flash_info_t * info, ulong dest, ulong data);
  79
  80/*-----------------------------------------------------------------------
  81 */
  82
  83unsigned long flash_init(void)
  84{
  85        unsigned long total_b = 0;
  86        unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  87        unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
  88        unsigned char switch_status;
  89        unsigned short index = 0;
  90        int i;
  91
  92        /* read FPGA base register FPGA_REG0 */
  93        switch_status = *fpga_base;
  94
  95        /* check the bitmap of switch status */
  96        if (switch_status & BOOT_SMALL_FLASH) {
  97                index += BOOT_SMALL_FLASH_VAL;
  98        }
  99        if (switch_status & FLASH_ONBD_N) {
 100                index += FLASH_ONBD_N_VAL;
 101        }
 102        if (switch_status & FLASH_SRAM_SEL) {
 103                index += FLASH_SRAM_SEL_VAL;
 104        }
 105
 106        DEBUGF("\n");
 107        DEBUGF("FLASH: Index: %d\n", index);
 108
 109        /* Init: no FLASHes known */
 110        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 111                flash_info[i].flash_id = FLASH_UNKNOWN;
 112                flash_info[i].sector_count = -1;
 113                flash_info[i].size = 0;
 114
 115                /* check whether the address is 0 */
 116                if (flash_addr_table[index][i] == 0) {
 117                        continue;
 118                }
 119
 120                /* call flash_get_size() to initialize sector address */
 121                size_b[i] =
 122                    flash_get_size((vu_long *) flash_addr_table[index][i],
 123                                   &flash_info[i]);
 124                flash_info[i].size = size_b[i];
 125                if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 126                        printf
 127                            ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 128                             i, size_b[i], size_b[i] << 20);
 129                        flash_info[i].sector_count = -1;
 130                        flash_info[i].size = 0;
 131                }
 132
 133                /* Monitor protection ON by default */
 134                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 135                                    CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 136                                    &flash_info[i]);
 137#ifdef CONFIG_ENV_IS_IN_FLASH
 138                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 139                                    CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 140                                    &flash_info[i]);
 141                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 142                                    CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 143                                    &flash_info[i]);
 144#endif
 145
 146                total_b += flash_info[i].size;
 147        }
 148
 149        return total_b;
 150}
 151