board/amcc/bamboo/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 #include <ppc440.h>
  38 #include "bamboo.h"
  39
  40 #undef DEBUG
  41
  42 #ifdef DEBUG
  43 #define DEBUGF(x...) printf(x)
  44 #else
  45 #define DEBUGF(x...)
  46 #endif                          /* DEBUG */
  47
  48 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  49
  50 /*
  51  * Mark big flash bank (16 bit instead of 8 bit access) in address with bit 0
  52  */
  53 static unsigned long flash_addr_table[][CONFIG_SYS_MAX_FLASH_BANKS] = {
  54         {0x87800001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
  55         {0x00000000, 0x00000000, 0x00000000}, /* 1:boot from pci 66      */
  56         {0x87800001, 0x00000000, 0x00000000}, /* 0:boot from nand flash  */
  57         {0x87F00000, 0x87F80000, 0xFFC00001}, /* 3:boot from big flash 33*/
  58         {0x87F00000, 0x87F80000, 0xFFC00001}, /* 4:boot from big flash 66*/
  59         {0x00000000, 0x00000000, 0x00000000}, /* 5:boot from             */
  60         {0x00000000, 0x00000000, 0x00000000}, /* 6:boot from pci 66      */
  61         {0x00000000, 0x00000000, 0x00000000}, /* 7:boot from             */
  62         {0x87C00001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
  63 };
  64
  65 /*
  66  * include common flash code (for amcc boards)
  67  */
  68 #include "../common/flash.c"
  69
  70 /*-----------------------------------------------------------------------
  71  * Functions
  72  */
  73 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  74 static int write_word(flash_info_t * info, ulong dest, ulong data);
  75
  76 /*-----------------------------------------------------------------------
  77  */
  78
  79 unsigned long flash_init(void)
  80 {
  81         unsigned long total_b = 0;
  82         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  83         unsigned short index = 0;
  84         int i;
  85         unsigned long val;
  86         unsigned long ebc_boot_size;
  87         unsigned long boot_selection;
  88
  89         mfsdr(sdr_pstrp0, val);
  90         index = (val & SDR0_PSTRP0_BOOTSTRAP_MASK) >> 29;
  91
  92         if ((index == 5) || (index == 7)) {
  93                 /*
  94                  * Boot Settings in IIC EEprom address 0xA8 or 0xA4
  95                  * Read Serial Device Strap Register1 in PPC440EP
  96                  */
  97                 mfsdr(sdr_sdstp1, val);
  98                 boot_selection  = val & SDR0_SDSTP1_BOOT_SEL_MASK;
  99                 ebc_boot_size   = val & SDR0_SDSTP1_EBC_ROM_BS_MASK;
 100
 101                 switch(boot_selection) {
 102                 case SDR0_SDSTP1_BOOT_SEL_EBC:
 103                         switch(ebc_boot_size) {
 104                         case SDR0_SDSTP1_EBC_ROM_BS_16BIT:
 105                                 index = 3;
 106                                 break;
 107                         case SDR0_SDSTP1_EBC_ROM_BS_8BIT:
 108                                 index = 0;
 109                                 break;
 110                         }
 111                         break;
 112
 113                 case SDR0_SDSTP1_BOOT_SEL_PCI:
 114                         index = 1;
 115                         break;
 116
 117                 case SDR0_SDSTP1_BOOT_SEL_NDFC:
 118                         index = 2;
 119                         break;
 120                 }
 121         } else if (index == 0) {
 122                 if (in8(FPGA_SETTING_REG) & FPGA_SET_REG_OP_CODE_FLASH_ABOVE) {
 123                         index = 8; /* sram below op code flash -> new index 8 */
 124                 }
 125         }
 126
 127         DEBUGF("\n");
 128         DEBUGF("FLASH: Index: %d\n", index);
 129
 130         /* Init: no FLASHes known */
 131         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 132                 flash_info[i].flash_id = FLASH_UNKNOWN;
 133                 flash_info[i].sector_count = -1;
 134                 flash_info[i].size = 0;
 135
 136                 /* check whether the address is 0 */
 137                 if (flash_addr_table[index][i] == 0)
 138                         continue;
 139
 140                 DEBUGF("Detection bank %d...\n", i);
 141                 /* call flash_get_size() to initialize sector address */
 142                 size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
 143                                    &flash_info[i]);
 144                 flash_info[i].size = size_b[i];
 145                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 146                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 147                                i, size_b[i], size_b[i] << 20);
 148                         flash_info[i].sector_count = -1;
 149                         flash_info[i].size = 0;
 150                 }
 151
 152                 /* Monitor protection ON by default */
 153                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 154                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 155                                     &flash_info[i]);
 156 #if defined(CONFIG_ENV_IS_IN_FLASH)
 157                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 158                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 159                                     &flash_info[i]);
 160 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR_REDUND)
 161                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 162                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 163                                     &flash_info[i]);
 164 #endif
 165 #endif
 166
 167                 total_b += flash_info[i].size;
 168         }
 169
 170         return total_b;
 171 }