board/amcc/walnut/flash.c

   1 /*
   2  * (C) Copyright 2000-2005
   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 #undef DEBUG
  36 #ifdef DEBUG
  37 #define DEBUGF(x...) printf(x)
  38 #else
  39 #define DEBUGF(x...)
  40 #endif                          /* DEBUG */
  41
  42 /*
  43  * include common flash code (for amcc boards)
  44  */
  45 #include "../common/flash.c"
  46
  47 /*-----------------------------------------------------------------------
  48  * Functions
  49  */
  50 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  51 static void flash_get_offsets(ulong base, flash_info_t * info);
  52
  53 unsigned long flash_init(void)
  54 {
  55         unsigned long size_b0, size_b1;
  56         int i;
  57         uint pbcr;
  58         unsigned long base_b0, base_b1;
  59
  60         /* Init: no FLASHes known */
  61         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
  62                 flash_info[i].flash_id = FLASH_UNKNOWN;
  63         }
  64
  65         /* Static FLASH Bank configuration here - FIXME XXX */
  66
  67         size_b0 =
  68             flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
  69
  70         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  71                 printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  72                        size_b0, size_b0 << 20);
  73         }
  74
  75         /* Only one bank */
  76         if (CFG_MAX_FLASH_BANKS == 1) {
  77                 /* Setup offsets */
  78                 flash_get_offsets(FLASH_BASE0_PRELIM, &flash_info[0]);
  79
  80                 /* Monitor protection ON by default */
  81                 (void)flash_protect(FLAG_PROTECT_SET,
  82                                     CFG_MONITOR_BASE,
  83                                     CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
  84                                     &flash_info[0]);
  85 #ifdef CFG_ENV_IS_IN_FLASH
  86                 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
  87                                     CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
  88                                     &flash_info[0]);
  89                 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND,
  90                                     CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
  91                                     &flash_info[0]);
  92 #endif
  93
  94                 size_b1 = 0;
  95                 flash_info[0].size = size_b0;
  96         } else {
  97                 /* 2 banks */
  98                 size_b1 =
  99                     flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
 100                                    &flash_info[1]);
 101
 102                 /* Re-do sizing to get full correct info */
 103
 104                 if (size_b1) {
 105                         mtdcr(ebccfga, pb0cr);
 106                         pbcr = mfdcr(ebccfgd);
 107                         mtdcr(ebccfga, pb0cr);
 108                         base_b1 = -size_b1;
 109                         pbcr =
 110                             (pbcr & 0x0001ffff) | base_b1 |
 111                             (((size_b1 / 1024 / 1024) - 1) << 17);
 112                         mtdcr(ebccfgd, pbcr);
 113                         /*          printf("pb1cr = %x\n", pbcr); */
 114                 }
 115
 116                 if (size_b0) {
 117                         mtdcr(ebccfga, pb1cr);
 118                         pbcr = mfdcr(ebccfgd);
 119                         mtdcr(ebccfga, pb1cr);
 120                         base_b0 = base_b1 - size_b0;
 121                         pbcr =
 122                             (pbcr & 0x0001ffff) | base_b0 |
 123                             (((size_b0 / 1024 / 1024) - 1) << 17);
 124                         mtdcr(ebccfgd, pbcr);
 125                         /*            printf("pb0cr = %x\n", pbcr); */
 126                 }
 127
 128                 size_b0 = flash_get_size((vu_long *) base_b0, &flash_info[0]);
 129
 130                 flash_get_offsets(base_b0, &flash_info[0]);
 131
 132                 /* monitor protection ON by default */
 133                 (void)flash_protect(FLAG_PROTECT_SET,
 134                                     base_b0 + size_b0 - monitor_flash_len,
 135                                     base_b0 + size_b0 - 1, &flash_info[0]);
 136
 137                 if (size_b1) {
 138                         /* Re-do sizing to get full correct info */
 139                         size_b1 =
 140                             flash_get_size((vu_long *) base_b1, &flash_info[1]);
 141
 142                         flash_get_offsets(base_b1, &flash_info[1]);
 143
 144                         /* monitor protection ON by default */
 145                         (void)flash_protect(FLAG_PROTECT_SET,
 146                                             base_b1 + size_b1 -
 147                                             monitor_flash_len,
 148                                             base_b1 + size_b1 - 1,
 149                                             &flash_info[1]);
 150                         /* monitor protection OFF by default (one is enough) */
 151                         (void)flash_protect(FLAG_PROTECT_CLEAR,
 152                                             base_b0 + size_b0 -
 153                                             monitor_flash_len,
 154                                             base_b0 + size_b0 - 1,
 155                                             &flash_info[0]);
 156                 } else {
 157                         flash_info[1].flash_id = FLASH_UNKNOWN;
 158                         flash_info[1].sector_count = -1;
 159                 }
 160
 161                 flash_info[0].size = size_b0;
 162                 flash_info[1].size = size_b1;
 163         }                       /* else 2 banks */
 164         return (size_b0 + size_b1);
 165 }
 166
 167
 168 static void flash_get_offsets(ulong base, flash_info_t * info)
 169 {
 170         int i;
 171
 172         /* set up sector start address table */
 173         if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
 174             (info->flash_id == FLASH_AM040)) {
 175                 for (i = 0; i < info->sector_count; i++)
 176                         info->start[i] = base + (i * 0x00010000);
 177         } else {
 178                 if (info->flash_id & FLASH_BTYPE) {
 179                         /* set sector offsets for bottom boot block type        */
 180                         info->start[0] = base + 0x00000000;
 181                         info->start[1] = base + 0x00004000;
 182                         info->start[2] = base + 0x00006000;
 183                         info->start[3] = base + 0x00008000;
 184                         for (i = 4; i < info->sector_count; i++) {
 185                                 info->start[i] =
 186                                     base + (i * 0x00010000) - 0x00030000;
 187                         }
 188                 } else {
 189                         /* set sector offsets for top boot block type           */
 190                         i = info->sector_count - 1;
 191                         info->start[i--] = base + info->size - 0x00004000;
 192                         info->start[i--] = base + info->size - 0x00006000;
 193                         info->start[i--] = base + info->size - 0x00008000;
 194                         for (; i >= 0; i--) {
 195                                 info->start[i] = base + i * 0x00010000;
 196                         }
 197                 }
 198         }
 199 }