qemu/roms/u-boot/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  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 /*
  12  * Modified 4/5/2001
  13  * Wait for completion of each sector erase command issued
  14  * 4/5/2001
  15  * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  16  */
  17
  18 #include <common.h>
  19 #include <asm/ppc4xx.h>
  20 #include <asm/processor.h>
  21 #include <asm/ppc440.h>
  22 #include "bamboo.h"
  23
  24 #undef DEBUG
  25
  26 #ifdef DEBUG
  27 #define DEBUGF(x...) printf(x)
  28 #else
  29 #define DEBUGF(x...)
  30 #endif                          /* DEBUG */
  31
  32 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  33
  34 /*
  35  * Mark big flash bank (16 bit instead of 8 bit access) in address with bit 0
  36  */
  37 static unsigned long flash_addr_table[][CONFIG_SYS_MAX_FLASH_BANKS] = {
  38         {0x87800001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
  39         {0x00000000, 0x00000000, 0x00000000}, /* 1:boot from pci 66      */
  40         {0x87800001, 0x00000000, 0x00000000}, /* 0:boot from nand flash  */
  41         {0x87F00000, 0x87F80000, 0xFFC00001}, /* 3:boot from big flash 33*/
  42         {0x87F00000, 0x87F80000, 0xFFC00001}, /* 4:boot from big flash 66*/
  43         {0x00000000, 0x00000000, 0x00000000}, /* 5:boot from             */
  44         {0x00000000, 0x00000000, 0x00000000}, /* 6:boot from pci 66      */
  45         {0x00000000, 0x00000000, 0x00000000}, /* 7:boot from             */
  46         {0x87C00001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
  47 };
  48
  49 /*
  50  * include common flash code (for amcc boards)
  51  */
  52 #include "../common/flash.c"
  53
  54 /*-----------------------------------------------------------------------
  55  * Functions
  56  */
  57 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  58 static int write_word(flash_info_t * info, ulong dest, ulong data);
  59
  60 /*-----------------------------------------------------------------------
  61  */
  62
  63 unsigned long flash_init(void)
  64 {
  65         unsigned long total_b = 0;
  66         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  67         unsigned short index = 0;
  68         int i;
  69         unsigned long val;
  70         unsigned long ebc_boot_size;
  71         unsigned long boot_selection;
  72
  73         mfsdr(SDR0_PINSTP, val);
  74         index = (val & SDR0_PSTRP0_BOOTSTRAP_MASK) >> 29;
  75
  76         if ((index == 5) || (index == 7)) {
  77                 /*
  78                  * Boot Settings in IIC EEprom address 0xA8 or 0xA4
  79                  * Read Serial Device Strap Register1 in PPC440EP
  80                  */
  81                 mfsdr(SDR0_SDSTP1, val);
  82                 boot_selection  = val & SDR0_SDSTP1_BOOT_SEL_MASK;
  83                 ebc_boot_size   = val & SDR0_SDSTP1_EBC_ROM_BS_MASK;
  84
  85                 switch(boot_selection) {
  86                 case SDR0_SDSTP1_BOOT_SEL_EBC:
  87                         switch(ebc_boot_size) {
  88                         case SDR0_SDSTP1_EBC_ROM_BS_16BIT:
  89                                 index = 3;
  90                                 break;
  91                         case SDR0_SDSTP1_EBC_ROM_BS_8BIT:
  92                                 index = 0;
  93                                 break;
  94                         }
  95                         break;
  96
  97                 case SDR0_SDSTP1_BOOT_SEL_PCI:
  98                         index = 1;
  99                         break;
 100
 101                 case SDR0_SDSTP1_BOOT_SEL_NDFC:
 102                         index = 2;
 103                         break;
 104                 }
 105         } else if (index == 0) {
 106                 if (in8(FPGA_SETTING_REG) & FPGA_SET_REG_OP_CODE_FLASH_ABOVE) {
 107                         index = 8; /* sram below op code flash -> new index 8 */
 108                 }
 109         }
 110
 111         DEBUGF("\n");
 112         DEBUGF("FLASH: Index: %d\n", index);
 113
 114         /* Init: no FLASHes known */
 115         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 116                 flash_info[i].flash_id = FLASH_UNKNOWN;
 117                 flash_info[i].sector_count = -1;
 118                 flash_info[i].size = 0;
 119
 120                 /* check whether the address is 0 */
 121                 if (flash_addr_table[index][i] == 0)
 122                         continue;
 123
 124                 DEBUGF("Detection bank %d...\n", i);
 125                 /* call flash_get_size() to initialize sector address */
 126                 size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
 127                                    &flash_info[i]);
 128                 flash_info[i].size = size_b[i];
 129                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 130                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 131                                i, size_b[i], size_b[i] << 20);
 132                         flash_info[i].sector_count = -1;
 133                         flash_info[i].size = 0;
 134                 }
 135
 136                 /* Monitor protection ON by default */
 137                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 138                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 139                                     &flash_info[i]);
 140 #if defined(CONFIG_ENV_IS_IN_FLASH)
 141                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 142                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 143                                     &flash_info[i]);
 144 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR_REDUND)
 145                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 146                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 147                                     &flash_info[i]);
 148 #endif
 149 #endif
 150
 151                 total_b += flash_info[i].size;
 152         }
 153
 154         return total_b;
 155 }