board/amcc/bubinga/flash.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * Modified 4/5/2001
  26  * Wait for completion of each sector erase command issued
  27  * 4/5/2001
  28  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  29  */
  30
  31 #include <common.h>
  32 #include <ppc4xx.h>
  33 #include <asm/processor.h>
  34
  35 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  36
  37 #undef DEBUG
  38 #ifdef DEBUG
  39 #define DEBUGF(x...) printf(x)
  40 #else
  41 #define DEBUGF(x...)
  42 #endif                          /* DEBUG */
  43
  44 /*
  45  * include common flash code (for amcc boards)
  46  */
  47 #include "../common/flash.c"
  48
  49 /*-----------------------------------------------------------------------
  50  * Functions
  51  */
  52 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  53 static void flash_get_offsets(ulong base, flash_info_t * info);
  54
  55 unsigned long flash_init(void)
  56 {
  57         unsigned long size_b0, size_b1;
  58         int i;
  59         uint pbcr;
  60         unsigned long base_b0, base_b1;
  61
  62         /* Init: no FLASHes known */
  63         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  64                 flash_info[i].flash_id = FLASH_UNKNOWN;
  65         }
  66
  67         /* Static FLASH Bank configuration here - FIXME XXX */
  68
  69         size_b0 =
  70             flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  71
  72         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  73                 printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  74                        size_b0, size_b0 << 20);
  75         }
  76
  77         /* Only one bank */
  78         if (CONFIG_SYS_MAX_FLASH_BANKS == 1) {
  79                 /* Setup offsets */
  80                 flash_get_offsets(FLASH_BASE0_PRELIM, &flash_info[0]);
  81
  82                 /* Monitor protection ON by default */
  83                 (void)flash_protect(FLAG_PROTECT_SET,
  84                                     CONFIG_SYS_MONITOR_BASE,
  85                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
  86                                     &flash_info[0]);
  87 #ifdef CONFIG_ENV_IS_IN_FLASH
  88                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
  89                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
  90                                     &flash_info[0]);
  91                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
  92                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
  93                                     &flash_info[0]);
  94 #endif
  95
  96                 size_b1 = 0;
  97                 flash_info[0].size = size_b0;
  98         }
  99
 100         /* 2 banks */
 101         else {
 102                 size_b1 =
 103                     flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
 104                                    &flash_info[1]);
 105
 106                 /* Re-do sizing to get full correct info */
 107
 108                 if (size_b1) {
 109                         mtdcr(ebccfga, pb0cr);
 110                         pbcr = mfdcr(ebccfgd);
 111                         mtdcr(ebccfga, pb0cr);
 112                         base_b1 = -size_b1;
 113                         pbcr = (pbcr & 0x0001ffff) | base_b1 |
 114                             (((size_b1 / 1024 / 1024) - 1) << 17);
 115                         mtdcr(ebccfgd, pbcr);
 116                         /*          printf("pb1cr = %x\n", pbcr); */
 117                 }
 118
 119                 if (size_b0) {
 120                         mtdcr(ebccfga, pb1cr);
 121                         pbcr = mfdcr(ebccfgd);
 122                         mtdcr(ebccfga, pb1cr);
 123                         base_b0 = base_b1 - size_b0;
 124                         pbcr = (pbcr & 0x0001ffff) | base_b0 |
 125                             (((size_b0 / 1024 / 1024) - 1) << 17);
 126                         mtdcr(ebccfgd, pbcr);
 127                         /*            printf("pb0cr = %x\n", pbcr); */
 128                 }
 129
 130                 size_b0 = flash_get_size((vu_long *) base_b0, &flash_info[0]);
 131
 132                 flash_get_offsets(base_b0, &flash_info[0]);
 133
 134                 /* monitor protection ON by default */
 135                 (void)flash_protect(FLAG_PROTECT_SET,
 136                                     base_b0 + size_b0 - CONFIG_SYS_MONITOR_LEN,
 137                                     base_b0 + size_b0 - 1, &flash_info[0]);
 138                 /* Also protect sector containing initial power-up instruction */
 139                 /* (flash_protect() checks address range - other call ignored) */
 140                 (void)flash_protect(FLAG_PROTECT_SET,
 141                                     0xFFFFFFFC, 0xFFFFFFFF, &flash_info[0]);
 142                 (void)flash_protect(FLAG_PROTECT_SET,
 143                                     0xFFFFFFFC, 0xFFFFFFFF, &flash_info[1]);
 144
 145                 if (size_b1) {
 146                         /* Re-do sizing to get full correct info */
 147                         size_b1 =
 148                             flash_get_size((vu_long *) base_b1, &flash_info[1]);
 149
 150                         flash_get_offsets(base_b1, &flash_info[1]);
 151
 152                         /* monitor protection ON by default */
 153                         (void)flash_protect(FLAG_PROTECT_SET,
 154                                             base_b1 + size_b1 - CONFIG_SYS_MONITOR_LEN,
 155                                             base_b1 + size_b1 - 1,
 156                                             &flash_info[1]);
 157                         /* monitor protection OFF by default (one is enough) */
 158                         (void)flash_protect(FLAG_PROTECT_CLEAR,
 159                                             base_b0 + size_b0 - CONFIG_SYS_MONITOR_LEN,
 160                                             base_b0 + size_b0 - 1,
 161                                             &flash_info[0]);
 162                 } else {
 163                         flash_info[1].flash_id = FLASH_UNKNOWN;
 164                         flash_info[1].sector_count = -1;
 165                 }
 166
 167                 flash_info[0].size = size_b0;
 168                 flash_info[1].size = size_b1;
 169         }                       /* else 2 banks */
 170         return (size_b0 + size_b1);
 171 }
 172
 173 static void flash_get_offsets(ulong base, flash_info_t * info)
 174 {
 175         int i;
 176
 177         /* set up sector start address table */
 178         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 179             (info->flash_id == FLASH_AM040)) {
 180                 for (i = 0; i < info->sector_count; i++)
 181                         info->start[i] = base + (i * 0x00010000);
 182         } else {
 183                 if (info->flash_id & FLASH_BTYPE) {
 184                         /* set sector offsets for bottom boot block type        */
 185                         info->start[0] = base + 0x00000000;
 186                         info->start[1] = base + 0x00004000;
 187                         info->start[2] = base + 0x00006000;
 188                         info->start[3] = base + 0x00008000;
 189                         for (i = 4; i < info->sector_count; i++) {
 190                                 info->start[i] =
 191                                     base + (i * 0x00010000) - 0x00030000;
 192                         }
 193                 } else {
 194                         /* set sector offsets for top boot block type           */
 195                         i = info->sector_count - 1;
 196                         info->start[i--] = base + info->size - 0x00004000;
 197                         info->start[i--] = base + info->size - 0x00006000;
 198                         info->start[i--] = base + info->size - 0x00008000;
 199                         for (; i >= 0; i--) {
 200                                 info->start[i] = base + i * 0x00010000;
 201                         }
 202                 }
 203         }
 204 }