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 <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
  56 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  57
  58 static 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  */
  77 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  78 static int write_word(flash_info_t * info, ulong dest, ulong data);
  79
  80 /*-----------------------------------------------------------------------
  81  */
  82
  83 unsigned 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 }