LXR uboot/board/amcc/bamboo/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#include <asm/ppc440.h>
  38#include "bamboo.h"
  39
  40#undef DEBUG
  41
  42#ifdef DEBUG
  43#define DEBUGF(x...) printf(x)
  44#else
  45#define DEBUGF(x...)
  46#endif                          /* DEBUG */
  47
  48flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  49
  50/*
  51 * Mark big flash bank (16 bit instead of 8 bit access) in address with bit 0
  52 */
  53static unsigned long flash_addr_table[][CONFIG_SYS_MAX_FLASH_BANKS] = {
  54        {0x87800001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
  55        {0x00000000, 0x00000000, 0x00000000}, /* 1:boot from pci 66      */
  56        {0x87800001, 0x00000000, 0x00000000}, /* 0:boot from nand flash  */
  57        {0x87F00000, 0x87F80000, 0xFFC00001}, /* 3:boot from big flash 33*/
  58        {0x87F00000, 0x87F80000, 0xFFC00001}, /* 4:boot from big flash 66*/
  59        {0x00000000, 0x00000000, 0x00000000}, /* 5:boot from             */
  60        {0x00000000, 0x00000000, 0x00000000}, /* 6:boot from pci 66      */
  61        {0x00000000, 0x00000000, 0x00000000}, /* 7:boot from             */
  62        {0x87C00001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
  63};
  64
  65/*
  66 * include common flash code (for amcc boards)
  67 */
  68#include "../common/flash.c"
  69
  70/*-----------------------------------------------------------------------
  71 * Functions
  72 */
  73static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  74static int write_word(flash_info_t * info, ulong dest, ulong data);
  75
  76/*-----------------------------------------------------------------------
  77 */
  78
  79unsigned long flash_init(void)
  80{
  81        unsigned long total_b = 0;
  82        unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  83        unsigned short index = 0;
  84        int i;
  85        unsigned long val;
  86        unsigned long ebc_boot_size;
  87        unsigned long boot_selection;
  88
  89        mfsdr(SDR0_PINSTP, val);
  90        index = (val & SDR0_PSTRP0_BOOTSTRAP_MASK) >> 29;
  91
  92        if ((index == 5) || (index == 7)) {
  93                /*
  94                 * Boot Settings in IIC EEprom address 0xA8 or 0xA4
  95                 * Read Serial Device Strap Register1 in PPC440EP
  96                 */
  97                mfsdr(SDR0_SDSTP1, val);
  98                boot_selection  = val & SDR0_SDSTP1_BOOT_SEL_MASK;
  99                ebc_boot_size   = val & SDR0_SDSTP1_EBC_ROM_BS_MASK;
 100
 101                switch(boot_selection) {
 102                case SDR0_SDSTP1_BOOT_SEL_EBC:
 103                        switch(ebc_boot_size) {
 104                        case SDR0_SDSTP1_EBC_ROM_BS_16BIT:
 105                                index = 3;
 106                                break;
 107                        case SDR0_SDSTP1_EBC_ROM_BS_8BIT:
 108                                index = 0;
 109                                break;
 110                        }
 111                        break;
 112
 113                case SDR0_SDSTP1_BOOT_SEL_PCI:
 114                        index = 1;
 115                        break;
 116
 117                case SDR0_SDSTP1_BOOT_SEL_NDFC:
 118                        index = 2;
 119                        break;
 120                }
 121        } else if (index == 0) {
 122                if (in8(FPGA_SETTING_REG) & FPGA_SET_REG_OP_CODE_FLASH_ABOVE) {
 123                        index = 8; /* sram below op code flash -> new index 8 */
 124                }
 125        }
 126
 127        DEBUGF("\n");
 128        DEBUGF("FLASH: Index: %d\n", index);
 129
 130        /* Init: no FLASHes known */
 131        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 132                flash_info[i].flash_id = FLASH_UNKNOWN;
 133                flash_info[i].sector_count = -1;
 134                flash_info[i].size = 0;
 135
 136                /* check whether the address is 0 */
 137                if (flash_addr_table[index][i] == 0)
 138                        continue;
 139
 140                DEBUGF("Detection bank %d...\n", i);
 141                /* call flash_get_size() to initialize sector address */
 142                size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
 143                                   &flash_info[i]);
 144                flash_info[i].size = size_b[i];
 145                if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 146                        printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 147                               i, size_b[i], size_b[i] << 20);
 148                        flash_info[i].sector_count = -1;
 149                        flash_info[i].size = 0;
 150                }
 151
 152                /* Monitor protection ON by default */
 153                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 154                                    CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 155                                    &flash_info[i]);
 156#if defined(CONFIG_ENV_IS_IN_FLASH)
 157                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 158                                    CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 159                                    &flash_info[i]);
 160#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR_REDUND)
 161                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 162                                    CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 163                                    &flash_info[i]);
 164#endif
 165#endif
 166
 167                total_b += flash_info[i].size;
 168        }
 169
 170        return total_b;
 171}
 172