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-/*
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- * (C) Copyright 2003
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- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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- *
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- * See file CREDITS for list of people who contributed to this
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- * project.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation; either version 2 of
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- * the License, or (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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- * MA 02111-1307 USA
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- */
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-
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-#include <common.h>
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-#include <asm/inca-ip.h>
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-
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-flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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-
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-typedef unsigned long FLASH_PORT_WIDTH;
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-typedef volatile unsigned long FLASH_PORT_WIDTHV;
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-
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-#define FLASH_ID_MASK 0xFFFFFFFF
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-
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-#define FPW FLASH_PORT_WIDTH
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-#define FPWV FLASH_PORT_WIDTHV
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-
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-#define ORMASK(size) ((-size) & OR_AM_MSK)
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-
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-#define FLASH29_REG_ADRS(reg) ((FPWV *)PHYS_FLASH_1 + (reg))
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-
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-/* FLASH29 command register addresses */
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-
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-#define FLASH29_REG_FIRST_CYCLE FLASH29_REG_ADRS (0x1555)
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-#define FLASH29_REG_SECOND_CYCLE FLASH29_REG_ADRS (0x2aaa)
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-#define FLASH29_REG_THIRD_CYCLE FLASH29_REG_ADRS (0x3555)
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-#define FLASH29_REG_FOURTH_CYCLE FLASH29_REG_ADRS (0x4555)
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-#define FLASH29_REG_FIFTH_CYCLE FLASH29_REG_ADRS (0x5aaa)
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-#define FLASH29_REG_SIXTH_CYCLE FLASH29_REG_ADRS (0x6555)
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-
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-/* FLASH29 command definitions */
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-
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-#define FLASH29_CMD_FIRST 0xaaaaaaaa
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-#define FLASH29_CMD_SECOND 0x55555555
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-#define FLASH29_CMD_FOURTH 0xaaaaaaaa
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-#define FLASH29_CMD_FIFTH 0x55555555
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-#define FLASH29_CMD_SIXTH 0x10101010
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-
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-#define FLASH29_CMD_SECTOR 0x30303030
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-#define FLASH29_CMD_PROGRAM 0xa0a0a0a0
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-#define FLASH29_CMD_CHIP_ERASE 0x80808080
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-#define FLASH29_CMD_READ_RESET 0xf0f0f0f0
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-#define FLASH29_CMD_AUTOSELECT 0x90909090
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-#define FLASH29_CMD_READ 0x70707070
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-
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-#define IN_RAM_CMD_READ 0x1
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-#define IN_RAM_CMD_WRITE 0x2
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-
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-#define FLASH_WRITE_CMD ((ulong)(flash_write_cmd) & 0x7)+0xbf008000
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-#define FLASH_READ_CMD ((ulong)(flash_read_cmd) & 0x7)+0xbf008000
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-
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-typedef void (*FUNCPTR_CP)(ulong *source, ulong *destination, ulong nlongs);
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-typedef void (*FUNCPTR_RD)(int cmd, FPWV * pFA, char * string, int strLen);
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-typedef void (*FUNCPTR_WR)(int cmd, FPWV * pFA, FPW value);
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-
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-static ulong flash_get_size(FPWV *addr, flash_info_t *info);
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-static int write_word(flash_info_t *info, FPWV *dest, FPW data);
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-static void flash_get_offsets(ulong base, flash_info_t *info);
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-static flash_info_t *flash_get_info(ulong base);
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-
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-static void load_cmd(ulong cmd);
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-static ulong in_ram_cmd = 0;
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-
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-
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-/******************************************************************************
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-*
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-* Don't change the program architecture
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-* This architecture assure the program
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-* can be relocated to scratch ram
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-*/
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-static void flash_read_cmd(int cmd, FPWV * pFA, char * string, int strLen)
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-{
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- int i,j;
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- FPW temp,temp1;
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- FPWV *str;
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-
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- str = (FPWV *)string;
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-
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- j= strLen/4;
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-
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- if(cmd == FLASH29_CMD_AUTOSELECT)
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- {
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- *(FLASH29_REG_FIRST_CYCLE) = FLASH29_CMD_FIRST;
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- *(FLASH29_REG_SECOND_CYCLE) = FLASH29_CMD_SECOND;
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- *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_AUTOSELECT;
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- }
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-
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- if(cmd == FLASH29_CMD_READ)
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- {
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- i = 0;
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- while(i<j)
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- {
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- temp = *pFA++;
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- temp1 = *(int *)0xa0000000;
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- *(int *)0xbf0081f8 = temp1 + temp;
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- *str++ = temp;
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- i++;
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- }
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- }
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-
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- if(cmd == FLASH29_CMD_READ_RESET)
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- {
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- *(FLASH29_REG_FIRST_CYCLE) = FLASH29_CMD_FIRST;
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- *(FLASH29_REG_SECOND_CYCLE) = FLASH29_CMD_SECOND;
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- *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_READ_RESET;
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- }
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-
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- *(int *)0xbf0081f8 = *(int *)0xa0000000; /* dummy read switch back to sdram interface */
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-}
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-
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-/******************************************************************************
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-*
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-* Don't change the program architecture
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-* This architecture assure the program
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-* can be relocated to scratch ram
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-*/
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-static void flash_write_cmd(int cmd, FPWV * pFA, FPW value)
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-{
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- *(FLASH29_REG_FIRST_CYCLE) = FLASH29_CMD_FIRST;
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- *(FLASH29_REG_SECOND_CYCLE) = FLASH29_CMD_SECOND;
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-
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- if (cmd == FLASH29_CMD_SECTOR)
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- {
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- *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_CHIP_ERASE;
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- *(FLASH29_REG_FOURTH_CYCLE) = FLASH29_CMD_FOURTH;
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- *(FLASH29_REG_FIFTH_CYCLE) = FLASH29_CMD_FIFTH;
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- *pFA = FLASH29_CMD_SECTOR;
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- }
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-
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- if (cmd == FLASH29_CMD_SIXTH)
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- {
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- *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_CHIP_ERASE;
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- *(FLASH29_REG_FOURTH_CYCLE) = FLASH29_CMD_FOURTH;
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- *(FLASH29_REG_FIFTH_CYCLE) = FLASH29_CMD_FIFTH;
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- *(FLASH29_REG_SIXTH_CYCLE) = FLASH29_CMD_SIXTH;
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- }
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-
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- if (cmd == FLASH29_CMD_PROGRAM)
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- {
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- *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_PROGRAM;
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- *pFA = value;
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- }
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-
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- if (cmd == FLASH29_CMD_READ_RESET)
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- {
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- *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_READ_RESET;
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- }
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-
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- *(int *)0xbf0081f8 = *(int *)0xa0000000; /* dummy read switch back to sdram interface */
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-}
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-
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-static void load_cmd(ulong cmd)
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-{
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- ulong *src;
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- ulong *dst;
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- FUNCPTR_CP absEntry;
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- ulong func;
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-
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- if (in_ram_cmd & cmd) return;
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-
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- if (cmd == IN_RAM_CMD_READ)
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- {
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- func = (ulong)flash_read_cmd;
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- }
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- else
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- {
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- func = (ulong)flash_write_cmd;
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- }
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-
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- src = (ulong *)(func & 0xfffffff8);
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- dst = (ulong *)0xbf008000;
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- absEntry = (FUNCPTR_CP)(0xbf0081d0);
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- absEntry(src,dst,0x38);
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-
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- in_ram_cmd = cmd;
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-}
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-
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-/*-----------------------------------------------------------------------
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- * flash_init()
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- *
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- * sets up flash_info and returns size of FLASH (bytes)
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- */
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-unsigned long flash_init (void)
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-{
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- unsigned long size = 0;
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- int i;
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-
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- load_cmd(IN_RAM_CMD_READ);
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-
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- /* Init: no FLASHes known */
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- for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
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- ulong flashbase = PHYS_FLASH_1;
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- ulong * buscon = (ulong *) INCA_IP_EBU_EBU_BUSCON0;
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-
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- /* Disable write protection */
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- *buscon &= ~INCA_IP_EBU_EBU_BUSCON1_WRDIS;
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-
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-#if 1
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- memset(&flash_info[i], 0, sizeof(flash_info_t));
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-#endif
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-
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- flash_info[i].size =
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- flash_get_size((FPW *)flashbase, &flash_info[i]);
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-
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- if (flash_info[i].flash_id == FLASH_UNKNOWN) {
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- printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx\n",
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- i, flash_info[i].size);
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- }
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-
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- size += flash_info[i].size;
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- }
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-
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-#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
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- /* monitor protection ON by default */
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- flash_protect(FLAG_PROTECT_SET,
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- CONFIG_SYS_MONITOR_BASE,
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- CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
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- flash_get_info(CONFIG_SYS_MONITOR_BASE));
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-#endif
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-
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-#ifdef CONFIG_ENV_IS_IN_FLASH
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- /* ENV protection ON by default */
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- flash_protect(FLAG_PROTECT_SET,
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- CONFIG_ENV_ADDR,
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- CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
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- flash_get_info(CONFIG_ENV_ADDR));
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-#endif
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-
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- return size;
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-}
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-
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-/*-----------------------------------------------------------------------
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- */
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-static void flash_get_offsets (ulong base, flash_info_t *info)
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-{
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- int i;
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-
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- if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD
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- && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM160B) {
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-
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- int bootsect_size[4]; /* number of bytes/boot sector */
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- int sect_size; /* number of bytes/regular sector */
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-
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- bootsect_size[0] = 0x00008000;
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- bootsect_size[1] = 0x00004000;
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- bootsect_size[2] = 0x00004000;
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- bootsect_size[3] = 0x00010000;
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- sect_size = 0x00020000;
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-
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- /* set sector offsets for bottom boot block type */
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- for (i = 0; i < info->sector_count; i++) {
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- info->start[i] = base;
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- base += i < 4 ? bootsect_size[i] : sect_size;
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- }
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- }
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-}
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-
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-/*-----------------------------------------------------------------------
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- */
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-
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-static flash_info_t *flash_get_info(ulong base)
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-{
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- int i;
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- flash_info_t * info;
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-
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- for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i ++) {
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- info = & flash_info[i];
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- if (info->start[0] <= base && base < info->start[0] + info->size)
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- break;
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- }
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-
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- return i == CONFIG_SYS_MAX_FLASH_BANKS ? 0 : info;
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-}
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-
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-/*-----------------------------------------------------------------------
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- */
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-
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-void flash_print_info (flash_info_t *info)
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-{
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- int i;
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- uchar *boottype;
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- uchar *bootletter;
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- char *fmt;
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- uchar botbootletter[] = "B";
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- uchar topbootletter[] = "T";
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- uchar botboottype[] = "bottom boot sector";
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- uchar topboottype[] = "top boot sector";
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-
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- if (info->flash_id == FLASH_UNKNOWN) {
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- printf ("missing or unknown FLASH type\n");
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- return;
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- }
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-
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- switch (info->flash_id & FLASH_VENDMASK) {
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- case FLASH_MAN_AMD: printf ("AMD "); break;
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- case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
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- case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
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- case FLASH_MAN_SST: printf ("SST "); break;
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- case FLASH_MAN_STM: printf ("STM "); break;
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- case FLASH_MAN_INTEL: printf ("INTEL "); break;
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- default: printf ("Unknown Vendor "); break;
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- }
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-
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- /* check for top or bottom boot, if it applies */
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- if (info->flash_id & FLASH_BTYPE) {
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- boottype = botboottype;
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- bootletter = botbootletter;
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- }
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- else {
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- boottype = topboottype;
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- bootletter = topbootletter;
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- }
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-
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- switch (info->flash_id & FLASH_TYPEMASK) {
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- case FLASH_AM160B:
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- fmt = "29LV160B%s (16 Mbit, %s)\n";
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- break;
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- case FLASH_28F800C3B:
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- case FLASH_28F800C3T:
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- fmt = "28F800C3%s (8 Mbit, %s)\n";
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- break;
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- case FLASH_INTEL800B:
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- case FLASH_INTEL800T:
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- fmt = "28F800B3%s (8 Mbit, %s)\n";
|
|
|
|
- break;
|
|
|
|
- case FLASH_28F160C3B:
|
|
|
|
- case FLASH_28F160C3T:
|
|
|
|
- fmt = "28F160C3%s (16 Mbit, %s)\n";
|
|
|
|
- break;
|
|
|
|
- case FLASH_INTEL160B:
|
|
|
|
- case FLASH_INTEL160T:
|
|
|
|
- fmt = "28F160B3%s (16 Mbit, %s)\n";
|
|
|
|
- break;
|
|
|
|
- case FLASH_28F320C3B:
|
|
|
|
- case FLASH_28F320C3T:
|
|
|
|
- fmt = "28F320C3%s (32 Mbit, %s)\n";
|
|
|
|
- break;
|
|
|
|
- case FLASH_INTEL320B:
|
|
|
|
- case FLASH_INTEL320T:
|
|
|
|
- fmt = "28F320B3%s (32 Mbit, %s)\n";
|
|
|
|
- break;
|
|
|
|
- case FLASH_28F640C3B:
|
|
|
|
- case FLASH_28F640C3T:
|
|
|
|
- fmt = "28F640C3%s (64 Mbit, %s)\n";
|
|
|
|
- break;
|
|
|
|
- case FLASH_INTEL640B:
|
|
|
|
- case FLASH_INTEL640T:
|
|
|
|
- fmt = "28F640B3%s (64 Mbit, %s)\n";
|
|
|
|
- break;
|
|
|
|
- default:
|
|
|
|
- fmt = "Unknown Chip Type\n";
|
|
|
|
- break;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- printf (fmt, bootletter, boottype);
|
|
|
|
-
|
|
|
|
- printf (" Size: %ld MB in %d Sectors\n",
|
|
|
|
- info->size >> 20,
|
|
|
|
- info->sector_count);
|
|
|
|
-
|
|
|
|
- printf (" Sector Start Addresses:");
|
|
|
|
-
|
|
|
|
- for (i=0; i<info->sector_count; ++i) {
|
|
|
|
- if ((i % 5) == 0) {
|
|
|
|
- printf ("\n ");
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- printf (" %08lX%s", info->start[i],
|
|
|
|
- info->protect[i] ? " (RO)" : " ");
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- printf ("\n");
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/*-----------------------------------------------------------------------
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-/*
|
|
|
|
- * The following code cannot be run from FLASH!
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-ulong flash_get_size (FPWV *addr, flash_info_t *info)
|
|
|
|
-{
|
|
|
|
- FUNCPTR_RD absEntry;
|
|
|
|
- FPW retValue;
|
|
|
|
- int flag;
|
|
|
|
-
|
|
|
|
- load_cmd(IN_RAM_CMD_READ);
|
|
|
|
- absEntry = (FUNCPTR_RD)FLASH_READ_CMD;
|
|
|
|
-
|
|
|
|
- flag = disable_interrupts();
|
|
|
|
- absEntry(FLASH29_CMD_AUTOSELECT,0,0,0);
|
|
|
|
- if (flag) enable_interrupts();
|
|
|
|
-
|
|
|
|
- udelay(100);
|
|
|
|
-
|
|
|
|
- flag = disable_interrupts();
|
|
|
|
- absEntry(FLASH29_CMD_READ, addr + 1, (char *)&retValue, sizeof(retValue));
|
|
|
|
- absEntry(FLASH29_CMD_READ_RESET,0,0,0);
|
|
|
|
- if (flag) enable_interrupts();
|
|
|
|
-
|
|
|
|
- udelay(100);
|
|
|
|
-
|
|
|
|
- switch (retValue) {
|
|
|
|
-
|
|
|
|
- case (FPW)AMD_ID_LV160B:
|
|
|
|
- info->flash_id += FLASH_AM160B;
|
|
|
|
- info->sector_count = 35;
|
|
|
|
- info->size = 0x00400000;
|
|
|
|
- break; /* => 8 or 16 MB */
|
|
|
|
-
|
|
|
|
- default:
|
|
|
|
- info->flash_id = FLASH_UNKNOWN;
|
|
|
|
- info->sector_count = 0;
|
|
|
|
- info->size = 0;
|
|
|
|
- return (0); /* => no or unknown flash */
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- flash_get_offsets((ulong)addr, info);
|
|
|
|
-
|
|
|
|
- return (info->size);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/*-----------------------------------------------------------------------
|
|
|
|
- */
|
|
|
|
-
|
|
|
|
-int flash_erase (flash_info_t *info, int s_first, int s_last)
|
|
|
|
-{
|
|
|
|
- FPWV *addr;
|
|
|
|
- int flag, prot, sect;
|
|
|
|
- ulong start, now, last;
|
|
|
|
- FUNCPTR_WR absEntry;
|
|
|
|
-
|
|
|
|
- load_cmd(IN_RAM_CMD_WRITE);
|
|
|
|
- absEntry = (FUNCPTR_WR)FLASH_WRITE_CMD;
|
|
|
|
-
|
|
|
|
- if ((s_first < 0) || (s_first > s_last)) {
|
|
|
|
- if (info->flash_id == FLASH_UNKNOWN) {
|
|
|
|
- printf ("- missing\n");
|
|
|
|
- } else {
|
|
|
|
- printf ("- no sectors to erase\n");
|
|
|
|
- }
|
|
|
|
- return 1;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- switch (info->flash_id & FLASH_TYPEMASK) {
|
|
|
|
- case FLASH_AM160B:
|
|
|
|
- break;
|
|
|
|
- case FLASH_UNKNOWN:
|
|
|
|
- default:
|
|
|
|
- printf ("Can't erase unknown flash type %08lx - aborted\n",
|
|
|
|
- info->flash_id);
|
|
|
|
- return 1;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- prot = 0;
|
|
|
|
- for (sect=s_first; sect<=s_last; ++sect) {
|
|
|
|
- if (info->protect[sect]) {
|
|
|
|
- prot++;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- if (prot) {
|
|
|
|
- printf ("- Warning: %d protected sectors will not be erased!\n",
|
|
|
|
- prot);
|
|
|
|
- } else {
|
|
|
|
- printf ("\n");
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- last = get_timer(0);
|
|
|
|
-
|
|
|
|
- /* Start erase on unprotected sectors */
|
|
|
|
- for (sect = s_first; sect<=s_last; sect++) {
|
|
|
|
-
|
|
|
|
- if (info->protect[sect] != 0) /* protected, skip it */
|
|
|
|
- continue;
|
|
|
|
-
|
|
|
|
- /* Disable interrupts which might cause a timeout here */
|
|
|
|
- flag = disable_interrupts();
|
|
|
|
-
|
|
|
|
- addr = (FPWV *)(info->start[sect]);
|
|
|
|
- absEntry(FLASH29_CMD_SECTOR, addr, 0);
|
|
|
|
-
|
|
|
|
- /* re-enable interrupts if necessary */
|
|
|
|
- if (flag)
|
|
|
|
- enable_interrupts();
|
|
|
|
-
|
|
|
|
- start = get_timer(0);
|
|
|
|
-
|
|
|
|
- while ((now = get_timer(start)) <= CONFIG_SYS_FLASH_ERASE_TOUT) {
|
|
|
|
-
|
|
|
|
- /* show that we're waiting */
|
|
|
|
- if ((get_timer(last)) > CONFIG_SYS_HZ) {/* every second */
|
|
|
|
- putc ('.');
|
|
|
|
- last = get_timer(0);
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- flag = disable_interrupts();
|
|
|
|
- absEntry(FLASH29_CMD_READ_RESET,0,0);
|
|
|
|
- if (flag)
|
|
|
|
- enable_interrupts();
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- printf (" done\n");
|
|
|
|
- return 0;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-/*-----------------------------------------------------------------------
|
|
|
|
- * Copy memory to flash, returns:
|
|
|
|
- * 0 - OK
|
|
|
|
- * 1 - write timeout
|
|
|
|
- * 2 - Flash not erased
|
|
|
|
- */
|
|
|
|
-int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
|
|
|
|
-{
|
|
|
|
- FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */
|
|
|
|
- int bytes; /* number of bytes to program in current word */
|
|
|
|
- int left; /* number of bytes left to program */
|
|
|
|
- int i, res;
|
|
|
|
-
|
|
|
|
- for (left = cnt, res = 0;
|
|
|
|
- left > 0 && res == 0;
|
|
|
|
- addr += sizeof(data), left -= sizeof(data) - bytes) {
|
|
|
|
-
|
|
|
|
- bytes = addr & (sizeof(data) - 1);
|
|
|
|
- addr &= ~(sizeof(data) - 1);
|
|
|
|
-
|
|
|
|
- /* combine source and destination data so can program
|
|
|
|
- * an entire word of 16 or 32 bits
|
|
|
|
- */
|
|
|
|
- for (i = 0; i < sizeof(data); i++) {
|
|
|
|
- data <<= 8;
|
|
|
|
- if (i < bytes || i - bytes >= left )
|
|
|
|
- data += *((uchar *)addr + i);
|
|
|
|
- else
|
|
|
|
- data += *src++;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- res = write_word(info, (FPWV *)addr, data);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- return (res);
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static int write_word (flash_info_t *info, FPWV *dest, FPW data)
|
|
|
|
-{
|
|
|
|
- int res = 0; /* result, assume success */
|
|
|
|
- FUNCPTR_WR absEntry;
|
|
|
|
- int flag;
|
|
|
|
-
|
|
|
|
- /* Check if Flash is (sufficiently) erased */
|
|
|
|
- if ((*dest & data) != data) {
|
|
|
|
- return (2);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- if (info->start[0] != PHYS_FLASH_1)
|
|
|
|
- {
|
|
|
|
- return (3);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- load_cmd(IN_RAM_CMD_WRITE);
|
|
|
|
- absEntry = (FUNCPTR_WR)FLASH_WRITE_CMD;
|
|
|
|
-
|
|
|
|
- flag = disable_interrupts();
|
|
|
|
- absEntry(FLASH29_CMD_PROGRAM,dest,data);
|
|
|
|
- if (flag) enable_interrupts();
|
|
|
|
-
|
|
|
|
- udelay(100);
|
|
|
|
-
|
|
|
|
- flag = disable_interrupts();
|
|
|
|
- absEntry(FLASH29_CMD_READ_RESET,0,0);
|
|
|
|
- if (flag) enable_interrupts();
|
|
|
|
-
|
|
|
|
- return (res);
|
|
|
|
-}
|
|
|