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 <ppc4xx.h>
  36 #include <asm/processor.h>
  37
  38 #undef DEBUG
  39 #ifdef DEBUG
  40 #define DEBUGF(x...) printf(x)
  41 #else
  42 #define DEBUGF(x...)
  43 #endif                          /* DEBUG */
  44
  45 #define     BOOT_SMALL_FLASH        32  /* 00100000 */
  46 #define     FLASH_ONBD_N            2   /* 00000010 */
  47 #define     FLASH_SRAM_SEL          1   /* 00000001 */
  48
  49 #define     BOOT_SMALL_FLASH_VAL    4
  50 #define     FLASH_ONBD_N_VAL        2
  51 #define     FLASH_SRAM_SEL_VAL      1
  52
  53 static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
  54         {0xffc00000, 0xffe00000, 0xff880000},   /* 0:000: configuraton 3 */
  55         {0xffc00000, 0xffe00000, 0xff800000},   /* 1:001: configuraton 4 */
  56         {0xffc00000, 0xffe00000, 0x00000000},   /* 2:010: configuraton 7 */
  57         {0xffc00000, 0xffe00000, 0x00000000},   /* 3:011: configuraton 8 */
  58         {0xff800000, 0xffa00000, 0xfff80000},   /* 4:100: configuraton 1 */
  59         {0xff800000, 0xffa00000, 0xfff00000},   /* 5:101: configuraton 2 */
  60         {0xffc00000, 0xffe00000, 0x00000000},   /* 6:110: configuraton 5 */
  61         {0xffc00000, 0xffe00000, 0x00000000}    /* 7:111: configuraton 6 */
  62 };
  63
  64 /*
  65  * include common flash code (for amcc boards)
  66  */
  67 #include "../common/flash.c"
  68
  69 /*-----------------------------------------------------------------------
  70  * Functions
  71  */
  72 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  73
  74 unsigned long flash_init(void)
  75 {
  76         unsigned long total_b = 0;
  77         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  78         unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
  79         unsigned char switch_status;
  80         unsigned short index = 0;
  81         int i;
  82
  83         /* read FPGA base register FPGA_REG0 */
  84         switch_status = *fpga_base;
  85
  86         /* check the bitmap of switch status */
  87         if (switch_status & BOOT_SMALL_FLASH) {
  88                 index += BOOT_SMALL_FLASH_VAL;
  89         }
  90         if (switch_status & FLASH_ONBD_N) {
  91                 index += FLASH_ONBD_N_VAL;
  92         }
  93         if (switch_status & FLASH_SRAM_SEL) {
  94                 index += FLASH_SRAM_SEL_VAL;
  95         }
  96
  97         DEBUGF("\n");
  98         DEBUGF("FLASH: Index: %d\n", index);
  99
 100         /* Init: no FLASHes known */
 101         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 102                 flash_info[i].flash_id = FLASH_UNKNOWN;
 103                 flash_info[i].sector_count = -1;
 104                 flash_info[i].size = 0;
 105
 106                 /* check whether the address is 0 */
 107                 if (flash_addr_table[index][i] == 0) {
 108                         continue;
 109                 }
 110
 111                 /* call flash_get_size() to initialize sector address */
 112                 size_b[i] = flash_get_size((vu_long *)
 113                                            flash_addr_table[index][i],
 114                                            &flash_info[i]);
 115                 flash_info[i].size = size_b[i];
 116                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 117                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 118                                i, size_b[i], size_b[i] << 20);
 119                         flash_info[i].sector_count = -1;
 120                         flash_info[i].size = 0;
 121                 }
 122
 123                 /* Monitor protection ON by default */
 124                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 125                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 126                                     &flash_info[2]);
 127 #ifdef CONFIG_ENV_IS_IN_FLASH
 128                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 129                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 130                                     &flash_info[2]);
 131                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 132                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 133                                     &flash_info[2]);
 134 #endif
 135
 136                 total_b += flash_info[i].size;
 137         }
 138
 139         return total_b;
 140 }