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Diffstat (limited to 'board/amcc/ebony/flash.c')
| -rw-r--r-- | board/amcc/ebony/flash.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/board/amcc/ebony/flash.c b/board/amcc/ebony/flash.c new file mode 100644 index 0000000..e8fbbc4 --- /dev/null +++ b/board/amcc/ebony/flash.c @@ -0,0 +1,140 @@ +/* + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2002 Jun Gu <jung@artesyncp.com> + * Add support for Am29F016D and dynamic switch setting. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* + * Modified 4/5/2001 + * Wait for completion of each sector erase command issued + * 4/5/2001 + * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com + */ + +#include <common.h> +#include <ppc4xx.h> +#include <asm/processor.h> + +#undef DEBUG +#ifdef DEBUG +#define DEBUGF(x...) printf(x) +#else +#define DEBUGF(x...) +#endif /* DEBUG */ + +#define BOOT_SMALL_FLASH 32 /* 00100000 */ +#define FLASH_ONBD_N 2 /* 00000010 */ +#define FLASH_SRAM_SEL 1 /* 00000001 */ + +#define BOOT_SMALL_FLASH_VAL 4 +#define FLASH_ONBD_N_VAL 2 +#define FLASH_SRAM_SEL_VAL 1 + +static unsigned long flash_addr_table[8][CFG_MAX_FLASH_BANKS] = { + {0xffc00000, 0xffe00000, 0xff880000}, /* 0:000: configuraton 3 */ + {0xffc00000, 0xffe00000, 0xff800000}, /* 1:001: configuraton 4 */ + {0xffc00000, 0xffe00000, 0x00000000}, /* 2:010: configuraton 7 */ + {0xffc00000, 0xffe00000, 0x00000000}, /* 3:011: configuraton 8 */ + {0xff800000, 0xffa00000, 0xfff80000}, /* 4:100: configuraton 1 */ + {0xff800000, 0xffa00000, 0xfff00000}, /* 5:101: configuraton 2 */ + {0xffc00000, 0xffe00000, 0x00000000}, /* 6:110: configuraton 5 */ + {0xffc00000, 0xffe00000, 0x00000000} /* 7:111: configuraton 6 */ +}; + +/* + * include common flash code (for amcc boards) + */ +#include "../common/flash.c" + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size(vu_long * addr, flash_info_t * info); + +unsigned long flash_init(void) +{ + unsigned long total_b = 0; + unsigned long size_b[CFG_MAX_FLASH_BANKS]; + unsigned char *fpga_base = (unsigned char *)CFG_FPGA_BASE; + unsigned char switch_status; + unsigned short index = 0; + int i; + + /* read FPGA base register FPGA_REG0 */ + switch_status = *fpga_base; + + /* check the bitmap of switch status */ + if (switch_status & BOOT_SMALL_FLASH) { + index += BOOT_SMALL_FLASH_VAL; + } + if (switch_status & FLASH_ONBD_N) { + index += FLASH_ONBD_N_VAL; + } + if (switch_status & FLASH_SRAM_SEL) { + index += FLASH_SRAM_SEL_VAL; + } + + DEBUGF("\n"); + DEBUGF("FLASH: Index: %d\n", index); + + /* Init: no FLASHes known */ + for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + flash_info[i].sector_count = -1; + flash_info[i].size = 0; + + /* check whether the address is 0 */ + if (flash_addr_table[index][i] == 0) { + continue; + } + + /* call flash_get_size() to initialize sector address */ + size_b[i] = flash_get_size((vu_long *) + flash_addr_table[index][i], + &flash_info[i]); + flash_info[i].size = size_b[i]; + if (flash_info[i].flash_id == FLASH_UNKNOWN) { + printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", + i, size_b[i], size_b[i] << 20); + flash_info[i].sector_count = -1; + flash_info[i].size = 0; + } + + /* Monitor protection ON by default */ + (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, + CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, + &flash_info[2]); +#ifdef CFG_ENV_IS_IN_FLASH + (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1, + &flash_info[2]); + (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND, + CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1, + &flash_info[2]); +#endif + + total_b += flash_info[i].size; + } + + return total_b; +} |