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

   1/*
   2 * (C) Copyright 2002
   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/io.h>
  38
  39#undef DEBUG
  40#ifdef DEBUG
  41#define DEBUGF(x...) printf(x)
  42#else
  43#define DEBUGF(x...)
  44#endif                          /* DEBUG */
  45
  46#define     BOOT_SMALL_FLASH        32  /* 00100000 */
  47#define     FLASH_ONBD_N            2   /* 00000010 */
  48#define     FLASH_SRAM_SEL          1   /* 00000001 */
  49
  50#define     BOOT_SMALL_FLASH_VAL    4
  51#define     FLASH_ONBD_N_VAL        2
  52#define     FLASH_SRAM_SEL_VAL      1
  53
  54static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
  55        {0xffc00000, 0xffe00000, 0xff880000},   /* 0:000: configuraton 3 */
  56        {0xffc00000, 0xffe00000, 0xff800000},   /* 1:001: configuraton 4 */
  57        {0xffc00000, 0xffe00000, 0x00000000},   /* 2:010: configuraton 7 */
  58        {0xffc00000, 0xffe00000, 0x00000000},   /* 3:011: configuraton 8 */
  59        {0xff800000, 0xffa00000, 0xfff80000},   /* 4:100: configuraton 1 */
  60        {0xff800000, 0xffa00000, 0xfff00000},   /* 5:101: configuraton 2 */
  61        {0xffc00000, 0xffe00000, 0x00000000},   /* 6:110: configuraton 5 */
  62        {0xffc00000, 0xffe00000, 0x00000000}    /* 7:111: configuraton 6 */
  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);
  74
  75/*
  76 * Override the weak default mapping function with a board specific one
  77 */
  78u32 flash_get_bank_size(int cs, int idx)
  79{
  80        u8 reg = in_8((void *)CONFIG_SYS_FPGA_BASE);
  81
  82        if ((reg & BOOT_SMALL_FLASH) && !(reg & FLASH_ONBD_N)) {
  83                /*
  84                 * cs0: small flash (512KiB)
  85                 * cs2: 2 * big flash (2 * 2MiB)
  86                 */
  87                if (cs == 0)
  88                        return flash_info[2].size;
  89                if (cs == 2)
  90                        return flash_info[0].size + flash_info[1].size;
  91        } else {
  92                /*
  93                 * cs0: 2 * big flash (2 * 2MiB)
  94                 * cs2: small flash (512KiB)
  95                 */
  96                if (cs == 0)
  97                        return flash_info[0].size + flash_info[1].size;
  98                if (cs == 2)
  99                        return flash_info[2].size;
 100        }
 101
 102        return 0;
 103}
 104
 105unsigned long flash_init(void)
 106{
 107        unsigned long total_b = 0;
 108        unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
 109        unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
 110        unsigned char switch_status;
 111        unsigned short index = 0;
 112        int i;
 113
 114        /* read FPGA base register FPGA_REG0 */
 115        switch_status = *fpga_base;
 116
 117        /* check the bitmap of switch status */
 118        if (switch_status & BOOT_SMALL_FLASH) {
 119                index += BOOT_SMALL_FLASH_VAL;
 120        }
 121        if (switch_status & FLASH_ONBD_N) {
 122                index += FLASH_ONBD_N_VAL;
 123        }
 124        if (switch_status & FLASH_SRAM_SEL) {
 125                index += FLASH_SRAM_SEL_VAL;
 126        }
 127
 128        DEBUGF("\n");
 129        DEBUGF("FLASH: Index: %d\n", index);
 130
 131        /* Init: no FLASHes known */
 132        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 133                flash_info[i].flash_id = FLASH_UNKNOWN;
 134                flash_info[i].sector_count = -1;
 135                flash_info[i].size = 0;
 136
 137                /* check whether the address is 0 */
 138                if (flash_addr_table[index][i] == 0) {
 139                        continue;
 140                }
 141
 142                /* call flash_get_size() to initialize sector address */
 143                size_b[i] = flash_get_size((vu_long *)
 144                                           flash_addr_table[index][i],
 145                                           &flash_info[i]);
 146                flash_info[i].size = size_b[i];
 147                if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 148                        printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 149                               i, size_b[i], size_b[i] << 20);
 150                        flash_info[i].sector_count = -1;
 151                        flash_info[i].size = 0;
 152                }
 153
 154                /* Monitor protection ON by default */
 155                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 156                                    CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 157                                    &flash_info[2]);
 158#ifdef CONFIG_ENV_IS_IN_FLASH
 159                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 160                                    CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 161                                    &flash_info[2]);
 162                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 163                                    CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 164                                    &flash_info[2]);
 165#endif
 166
 167                total_b += flash_info[i].size;
 168        }
 169
 170        return total_b;
 171}
 172