board/amcc/ebony/flash.c

   1 /*
   2  * (C) Copyright 2002
   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 <asm/ppc4xx.h>
  36 #include <asm/processor.h>
  37 #include <asm/io.h>
  38
  39 #undef DEBUG
  40 #ifdef DEBUG
  41 #define DEBUGF(x...) printf(x)
  42 #else
  43 #define DEBUGF(x...)
  44 #endif                          /* DEBUG */
  45
  46 #define     BOOT_SMALL_FLASH        32  /* 00100000 */
  47 #define     FLASH_ONBD_N            2   /* 00000010 */
  48 #define     FLASH_SRAM_SEL          1   /* 00000001 */
  49
  50 #define     BOOT_SMALL_FLASH_VAL    4
  51 #define     FLASH_ONBD_N_VAL        2
  52 #define     FLASH_SRAM_SEL_VAL      1
  53
  54 static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
  55         {0xffc00000, 0xffe00000, 0xff880000},   /* 0:000: configuraton 3 */
  56         {0xffc00000, 0xffe00000, 0xff800000},   /* 1:001: configuraton 4 */
  57         {0xffc00000, 0xffe00000, 0x00000000},   /* 2:010: configuraton 7 */
  58         {0xffc00000, 0xffe00000, 0x00000000},   /* 3:011: configuraton 8 */
  59         {0xff800000, 0xffa00000, 0xfff80000},   /* 4:100: configuraton 1 */
  60         {0xff800000, 0xffa00000, 0xfff00000},   /* 5:101: configuraton 2 */
  61         {0xffc00000, 0xffe00000, 0x00000000},   /* 6:110: configuraton 5 */
  62         {0xffc00000, 0xffe00000, 0x00000000}    /* 7:111: configuraton 6 */
  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
  75 /*
  76  * Override the weak default mapping function with a board specific one
  77  */
  78 u32 flash_get_bank_size(int cs, int idx)
  79 {
  80         u8 reg = in_8((void *)CONFIG_SYS_FPGA_BASE);
  81
  82         if ((reg & BOOT_SMALL_FLASH) && !(reg & FLASH_ONBD_N)) {
  83                 /*
  84                  * cs0: small flash (512KiB)
  85                  * cs2: 2 * big flash (2 * 2MiB)
  86                  */
  87                 if (cs == 0)
  88                         return flash_info[2].size;
  89                 if (cs == 2)
  90                         return flash_info[0].size + flash_info[1].size;
  91         } else {
  92                 /*
  93                  * cs0: 2 * big flash (2 * 2MiB)
  94                  * cs2: small flash (512KiB)
  95                  */
  96                 if (cs == 0)
  97                         return flash_info[0].size + flash_info[1].size;
  98                 if (cs == 2)
  99                         return flash_info[2].size;
 100         }
 101
 102         return 0;
 103 }
 104
 105 unsigned long flash_init(void)
 106 {
 107         unsigned long total_b = 0;
 108         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
 109         unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
 110         unsigned char switch_status;
 111         unsigned short index = 0;
 112         int i;
 113
 114         /* read FPGA base register FPGA_REG0 */
 115         switch_status = *fpga_base;
 116
 117         /* check the bitmap of switch status */
 118         if (switch_status & BOOT_SMALL_FLASH) {
 119                 index += BOOT_SMALL_FLASH_VAL;
 120         }
 121         if (switch_status & FLASH_ONBD_N) {
 122                 index += FLASH_ONBD_N_VAL;
 123         }
 124         if (switch_status & FLASH_SRAM_SEL) {
 125                 index += FLASH_SRAM_SEL_VAL;
 126         }
 127
 128         DEBUGF("\n");
 129         DEBUGF("FLASH: Index: %d\n", index);
 130
 131         /* Init: no FLASHes known */
 132         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 133                 flash_info[i].flash_id = FLASH_UNKNOWN;
 134                 flash_info[i].sector_count = -1;
 135                 flash_info[i].size = 0;
 136
 137                 /* check whether the address is 0 */
 138                 if (flash_addr_table[index][i] == 0) {
 139                         continue;
 140                 }
 141
 142                 /* call flash_get_size() to initialize sector address */
 143                 size_b[i] = flash_get_size((vu_long *)
 144                                            flash_addr_table[index][i],
 145                                            &flash_info[i]);
 146                 flash_info[i].size = size_b[i];
 147                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 148                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 149                                i, size_b[i], size_b[i] << 20);
 150                         flash_info[i].sector_count = -1;
 151                         flash_info[i].size = 0;
 152                 }
 153
 154                 /* Monitor protection ON by default */
 155                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 156                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 157                                     &flash_info[2]);
 158 #ifdef CONFIG_ENV_IS_IN_FLASH
 159                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 160                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 161                                     &flash_info[2]);
 162                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 163                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 164                                     &flash_info[2]);
 165 #endif
 166
 167                 total_b += flash_info[i].size;
 168         }
 169
 170         return total_b;
 171 }