qemu/roms/u-boot/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  * 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/io.h>
  22
  23 #undef DEBUG
  24 #ifdef DEBUG
  25 #define DEBUGF(x...) printf(x)
  26 #else
  27 #define DEBUGF(x...)
  28 #endif                          /* DEBUG */
  29
  30 #define     BOOT_SMALL_FLASH        32  /* 00100000 */
  31 #define     FLASH_ONBD_N            2   /* 00000010 */
  32 #define     FLASH_SRAM_SEL          1   /* 00000001 */
  33
  34 #define     BOOT_SMALL_FLASH_VAL    4
  35 #define     FLASH_ONBD_N_VAL        2
  36 #define     FLASH_SRAM_SEL_VAL      1
  37
  38 static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
  39         {0xffc00000, 0xffe00000, 0xff880000},   /* 0:000: configuraton 3 */
  40         {0xffc00000, 0xffe00000, 0xff800000},   /* 1:001: configuraton 4 */
  41         {0xffc00000, 0xffe00000, 0x00000000},   /* 2:010: configuraton 7 */
  42         {0xffc00000, 0xffe00000, 0x00000000},   /* 3:011: configuraton 8 */
  43         {0xff800000, 0xffa00000, 0xfff80000},   /* 4:100: configuraton 1 */
  44         {0xff800000, 0xffa00000, 0xfff00000},   /* 5:101: configuraton 2 */
  45         {0xffc00000, 0xffe00000, 0x00000000},   /* 6:110: configuraton 5 */
  46         {0xffc00000, 0xffe00000, 0x00000000}    /* 7:111: configuraton 6 */
  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
  59 /*
  60  * Override the weak default mapping function with a board specific one
  61  */
  62 u32 flash_get_bank_size(int cs, int idx)
  63 {
  64         u8 reg = in_8((void *)CONFIG_SYS_FPGA_BASE);
  65
  66         if ((reg & BOOT_SMALL_FLASH) && !(reg & FLASH_ONBD_N)) {
  67                 /*
  68                  * cs0: small flash (512KiB)
  69                  * cs2: 2 * big flash (2 * 2MiB)
  70                  */
  71                 if (cs == 0)
  72                         return flash_info[2].size;
  73                 if (cs == 2)
  74                         return flash_info[0].size + flash_info[1].size;
  75         } else {
  76                 /*
  77                  * cs0: 2 * big flash (2 * 2MiB)
  78                  * cs2: small flash (512KiB)
  79                  */
  80                 if (cs == 0)
  81                         return flash_info[0].size + flash_info[1].size;
  82                 if (cs == 2)
  83                         return flash_info[2].size;
  84         }
  85
  86         return 0;
  87 }
  88
  89 unsigned long flash_init(void)
  90 {
  91         unsigned long total_b = 0;
  92         unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
  93         unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
  94         unsigned char switch_status;
  95         unsigned short index = 0;
  96         int i;
  97
  98         /* read FPGA base register FPGA_REG0 */
  99         switch_status = *fpga_base;
 100
 101         /* check the bitmap of switch status */
 102         if (switch_status & BOOT_SMALL_FLASH) {
 103                 index += BOOT_SMALL_FLASH_VAL;
 104         }
 105         if (switch_status & FLASH_ONBD_N) {
 106                 index += FLASH_ONBD_N_VAL;
 107         }
 108         if (switch_status & FLASH_SRAM_SEL) {
 109                 index += FLASH_SRAM_SEL_VAL;
 110         }
 111
 112         DEBUGF("\n");
 113         DEBUGF("FLASH: Index: %d\n", index);
 114
 115         /* Init: no FLASHes known */
 116         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 117                 flash_info[i].flash_id = FLASH_UNKNOWN;
 118                 flash_info[i].sector_count = -1;
 119                 flash_info[i].size = 0;
 120
 121                 /* check whether the address is 0 */
 122                 if (flash_addr_table[index][i] == 0) {
 123                         continue;
 124                 }
 125
 126                 /* call flash_get_size() to initialize sector address */
 127                 size_b[i] = flash_get_size((vu_long *)
 128                                            flash_addr_table[index][i],
 129                                            &flash_info[i]);
 130                 flash_info[i].size = size_b[i];
 131                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
 132                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
 133                                i, size_b[i], size_b[i] << 20);
 134                         flash_info[i].sector_count = -1;
 135                         flash_info[i].size = 0;
 136                 }
 137
 138                 /* Monitor protection ON by default */
 139                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
 140                                     CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
 141                                     &flash_info[2]);
 142 #ifdef CONFIG_ENV_IS_IN_FLASH
 143                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
 144                                     CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
 145                                     &flash_info[2]);
 146                 (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
 147                                     CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
 148                                     &flash_info[2]);
 149 #endif
 150
 151                 total_b += flash_info[i].size;
 152         }
 153
 154         return total_b;
 155 }