qemu/roms/u-boot/board/amcc/ocotea/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
  22 #undef DEBUG
  23
  24 #ifdef DEBUG
  25 #define DEBUGF(x...) printf(x)
  26 #else
  27 #define DEBUGF(x...)
  28 #endif                          /* DEBUG */
  29
  30 #define     BOOT_SMALL_FLASH        0x40        /* 01000000 */
  31 #define     FLASH_ONBD_N            2   /* 00000010 */
  32 #define     FLASH_SRAM_SEL          1   /* 00000001 */
  33 #define     FLASH_ONBD_N            2   /* 00000010 */
  34 #define     FLASH_SRAM_SEL          1   /* 00000001 */
  35
  36 #define     BOOT_SMALL_FLASH_VAL    4
  37 #define     FLASH_ONBD_N_VAL        2
  38 #define     FLASH_SRAM_SEL_VAL      1
  39
  40 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips        */
  41
  42 static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
  43         {0xFF800000, 0xFF880000, 0xFFC00000},   /* 0:000: configuraton 4 */
  44         {0xFF900000, 0xFF980000, 0xFFC00000},   /* 1:001: configuraton 3 */
  45         {0x00000000, 0x00000000, 0x00000000},   /* 2:010: configuraton 8 */
  46         {0x00000000, 0x00000000, 0x00000000},   /* 3:011: configuraton 7 */
  47         {0xFFE00000, 0xFFF00000, 0xFF800000},   /* 4:100: configuraton 2 */
  48         {0xFFF00000, 0xFFF80000, 0xFF800000},   /* 5:101: configuraton 1 */
  49         {0x00000000, 0x00000000, 0x00000000},   /* 6:110: configuraton 6 */
  50         {0x00000000, 0x00000000, 0x00000000}    /* 7:111: configuraton 5 */
  51 };
  52
  53 /*
  54  * include common flash code (for amcc boards)
  55  */
  56 #include "../common/flash.c"
  57
  58 /*-----------------------------------------------------------------------
  59  * Functions
  60  */
  61 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
  62 static int write_word(flash_info_t * info, ulong dest, ulong data);
  63
  64 /*-----------------------------------------------------------------------
  65  */
  66
  67 unsigned long flash_init(void)
  68 {
  69         unsigned long total_b = 0;
  70         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  71         unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
  72         unsigned char switch_status;
  73         unsigned short index = 0;
  74         int i;
  75
  76         /* read FPGA base register FPGA_REG0 */
  77         switch_status = *fpga_base;
  78
  79         /* check the bitmap of switch status */
  80         if (switch_status & BOOT_SMALL_FLASH) {
  81                 index += BOOT_SMALL_FLASH_VAL;
  82         }
  83         if (switch_status & FLASH_ONBD_N) {
  84                 index += FLASH_ONBD_N_VAL;
  85         }
  86         if (switch_status & FLASH_SRAM_SEL) {
  87                 index += FLASH_SRAM_SEL_VAL;
  88         }
  89
  90         DEBUGF("\n");
  91         DEBUGF("FLASH: Index: %d\n", index);
  92
  93         /* Init: no FLASHes known */
  94         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  95                 flash_info[i].flash_id = FLASH_UNKNOWN;
  96                 flash_info[i].sector_count = -1;
  97                 flash_info[i].size = 0;
  98
  99                 /* check whether the address is 0 */
 100                 if (flash_addr_table[index][i] == 0) {
 101                         continue;
 102                 }
 103
 104                 /* call flash_get_size() to initialize sector address */
 105                 size_b[i] =
 106                     flash_get_size((vu_long *) flash_addr_table[index][i],
 107                                    &flash_info[i]);
 108                 flash_info[i].size = size_b[i];
 109                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 110                         printf
 111                             ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 112                              i, size_b[i], size_b[i] << 20);
 113                         flash_info[i].sector_count = -1;
 114                         flash_info[i].size = 0;
 115                 }
 116
 117                 /* Monitor protection ON by default */
 118                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 119                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 120                                     &flash_info[i]);
 121 #ifdef CONFIG_ENV_IS_IN_FLASH
 122                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 123                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 124                                     &flash_info[i]);
 125                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 126                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 127                                     &flash_info[i]);
 128 #endif
 129
 130                 total_b += flash_info[i].size;
 131         }
 132
 133         return total_b;
 134 }