board/lpc2292sodimm/flash.c

   1 /*
   2  * (C) Copyright 2006 Embedded Artists AB <www.embeddedartists.com>
   3  *
   4  * Modified to use the routines in cpu/arm720t/lpc2292/flash.c by
   5  * Gary Jennejohn <garyj@denx,de>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <common.h>
  24 #include <asm/arch/hardware.h>
  25
  26 #define SST_BASEADDR 0x80000000
  27 #define SST_ADDR1 ((volatile ushort*)(SST_BASEADDR + (0x5555 << 1)))
  28 #define SST_ADDR2 ((volatile ushort*)(SST_BASEADDR + (0x2AAA << 1)))
  29
  30
  31 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
  32
  33 extern int lpc2292_copy_buffer_to_flash(flash_info_t *, ulong);
  34 extern int lpc2292_flash_erase(flash_info_t *, int, int);
  35 extern int lpc2292_write_buff (flash_info_t *, uchar *, ulong, ulong);
  36
  37 /*-----------------------------------------------------------------------
  38  *
  39  */
  40 void write_word_sst(ulong addr, ushort data)
  41 {
  42         ushort tmp;
  43
  44         *SST_ADDR1 = 0x00AA;
  45         *SST_ADDR2 = 0x0055;
  46         *SST_ADDR1 = 0x00A0;
  47         *((volatile ushort*)addr) = data;
  48         /* do data polling */
  49         do {
  50                 tmp = *((volatile ushort*)addr);
  51         } while (tmp != data);
  52 }
  53
  54 /*-----------------------------------------------------------------------
  55  */
  56
  57 ulong flash_init (void)
  58 {
  59         int j, k;
  60         ulong size = 0;
  61         ulong flashbase = 0;
  62
  63         flash_info[0].flash_id = (PHILIPS_LPC2292 & FLASH_VENDMASK);
  64         flash_info[0].size = 0x003E000; /* 256 - 8 KB */
  65         flash_info[0].sector_count = 17;
  66         memset (flash_info[0].protect, 0, 17);
  67         flashbase = 0x00000000;
  68         for (j = 0, k = 0; j < 8; j++, k++) {
  69                 flash_info[0].start[k] = flashbase;
  70                 flashbase += 0x00002000;
  71         }
  72         for (j = 0; j < 2; j++, k++) {
  73                 flash_info[0].start[k] = flashbase;
  74                 flashbase += 0x00010000;
  75         }
  76         for (j = 0; j < 7; j++, k++) {
  77                 flash_info[0].start[k] = flashbase;
  78                 flashbase += 0x00002000;
  79         }
  80         size += flash_info[0].size;
  81
  82         flash_info[1].flash_id = (SST_MANUFACT & FLASH_VENDMASK);
  83         flash_info[1].size = 0x00200000; /* 2 MB */
  84         flash_info[1].sector_count = 512;
  85         memset (flash_info[1].protect, 0, 512);
  86         flashbase = SST_BASEADDR;
  87         for (j=0; j<512; j++) {
  88                 flash_info[1].start[j] = flashbase;
  89                 flashbase += 0x1000;    /* 4 KB sectors */
  90         }
  91         size += flash_info[1].size;
  92
  93         /* Protect monitor and environment sectors */
  94         flash_protect (FLAG_PROTECT_SET,
  95                  0x0,
  96                  0x0 + monitor_flash_len - 1,
  97                  &flash_info[0]);
  98
  99         flash_protect (FLAG_PROTECT_SET,
 100                  CONFIG_ENV_ADDR,
 101                  CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 102                  &flash_info[0]);
 103
 104         return size;
 105 }
 106
 107 /*-----------------------------------------------------------------------
 108  */
 109 void flash_print_info (flash_info_t * info)
 110 {
 111         int i;
 112         int erased = 0;
 113         unsigned long j;
 114         unsigned long count;
 115         unsigned char *p;
 116
 117         switch (info->flash_id & FLASH_VENDMASK) {
 118         case (SST_MANUFACT & FLASH_VENDMASK):
 119                 printf("SST: ");
 120                 break;
 121         case (PHILIPS_LPC2292 & FLASH_VENDMASK):
 122                 printf("Philips: ");
 123                 break;
 124         default:
 125                 printf ("Unknown Vendor ");
 126                 break;
 127         }
 128
 129         printf ("  Size: %ld KB in %d Sectors\n",
 130           info->size >> 10, info->sector_count);
 131
 132         printf ("  Sector Start Addresses:");
 133         for (i = 0; i < info->sector_count; i++) {
 134                 if ((i % 5) == 0) {
 135                         printf ("\n   ");
 136                 }
 137                 if (i < (info->sector_count - 1)) {
 138                         count = info->start[i+1] - info->start[i];
 139                 }
 140                 else {
 141                         count = info->start[0] + info->size - info->start[i];
 142                 }
 143                 p = (unsigned char*)(info->start[i]);
 144                 erased = 1;
 145                 for (j = 0; j < count; j++) {
 146                         if (*p != 0xFF) {
 147                                 erased = 0;
 148                                 break;
 149                         }
 150                         p++;
 151                 }
 152                 printf (" %08lX%s%s", info->start[i], info->protect[i] ? " RO" : "   ",
 153                         erased ? " E" : "  ");
 154         }
 155         printf ("\n");
 156 }
 157
 158 int flash_erase_sst (flash_info_t * info, int s_first, int s_last)
 159 {
 160         int i;
 161
 162         for (i = s_first; i <= s_last; i++) {
 163                 *SST_ADDR1 = 0x00AA;
 164                 *SST_ADDR2 = 0x0055;
 165                 *SST_ADDR1 = 0x0080;
 166                 *SST_ADDR1 = 0x00AA;
 167                 *SST_ADDR2 = 0x0055;
 168                 *((volatile ushort*)(info->start[i])) = 0x0030;
 169                 /* wait for erase to finish */
 170                 udelay(25000);
 171         }
 172
 173         return ERR_OK;
 174 }
 175
 176 int flash_erase (flash_info_t * info, int s_first, int s_last)
 177 {
 178         switch (info->flash_id & FLASH_VENDMASK) {
 179                 case (SST_MANUFACT & FLASH_VENDMASK):
 180                         return flash_erase_sst(info, s_first, s_last);
 181                 case (PHILIPS_LPC2292 & FLASH_VENDMASK):
 182                         return lpc2292_flash_erase(info, s_first, s_last);
 183                 default:
 184                         return ERR_PROTECTED;
 185         }
 186         return ERR_PROTECTED;
 187 }
 188
 189 /*-----------------------------------------------------------------------
 190  * Copy memory to flash.
 191  *
 192  * cnt is in bytes
 193  */
 194
 195 int write_buff_sst (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 196 {
 197         ushort tmp;
 198         ulong i;
 199         uchar* src_org;
 200         uchar* dst_org;
 201         ulong cnt_org = cnt;
 202         int ret = ERR_OK;
 203
 204         src_org = src;
 205         dst_org = (uchar*)addr;
 206
 207         if (addr & 1) {         /* if odd address */
 208                 tmp = *((uchar*)(addr - 1)); /* little endian */
 209                 tmp |= (*src << 8);
 210                 write_word_sst(addr - 1, tmp);
 211                 addr += 1;
 212                 cnt -= 1;
 213                 src++;
 214         }
 215         while (cnt > 1) {
 216                 tmp = ((*(src+1)) << 8) + (*src); /* little endian */
 217                 write_word_sst(addr, tmp);
 218                 addr += 2;
 219                 src += 2;
 220                 cnt -= 2;
 221         }
 222         if (cnt > 0) {
 223                 tmp = (*((uchar*)(addr + 1))) << 8;
 224                 tmp |= *src;
 225                 write_word_sst(addr, tmp);
 226         }
 227
 228         for (i = 0; i < cnt_org; i++) {
 229                 if (*dst_org != *src_org) {
 230                         printf("Write failed. Byte %lX differs\n", i);
 231                         ret = ERR_PROG_ERROR;
 232                         break;
 233                 }
 234                 dst_org++;
 235                 src_org++;
 236         }
 237
 238         return ret;
 239 }
 240
 241 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 242 {
 243         switch (info->flash_id & FLASH_VENDMASK) {
 244                 case (SST_MANUFACT & FLASH_VENDMASK):
 245                         return write_buff_sst(info, src, addr, cnt);
 246                 case (PHILIPS_LPC2292 & FLASH_VENDMASK):
 247                         return lpc2292_write_buff(info, src, addr, cnt);
 248                 default:
 249                         return ERR_PROG_ERROR;
 250         }
 251         return ERR_PROG_ERROR;
 252 }