diff options
Diffstat (limited to 'board/purple/flash.c')
| -rw-r--r-- | board/purple/flash.c | 596 |
1 files changed, 596 insertions, 0 deletions
diff --git a/board/purple/flash.c b/board/purple/flash.c new file mode 100644 index 0000000..56d3acd --- /dev/null +++ b/board/purple/flash.c @@ -0,0 +1,596 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 + */ + +#include <common.h> +#include <asm/inca-ip.h> + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +typedef unsigned long FLASH_PORT_WIDTH; +typedef volatile unsigned long FLASH_PORT_WIDTHV; + +#define FLASH_ID_MASK 0xFFFFFFFF + +#define FPW FLASH_PORT_WIDTH +#define FPWV FLASH_PORT_WIDTHV + +#define ORMASK(size) ((-size) & OR_AM_MSK) + +#define FLASH29_REG_ADRS(reg) ((FPWV *)PHYS_FLASH_1 + (reg)) + +/* FLASH29 command register addresses */ + +#define FLASH29_REG_FIRST_CYCLE FLASH29_REG_ADRS (0x1555) +#define FLASH29_REG_SECOND_CYCLE FLASH29_REG_ADRS (0x2aaa) +#define FLASH29_REG_THIRD_CYCLE FLASH29_REG_ADRS (0x3555) +#define FLASH29_REG_FOURTH_CYCLE FLASH29_REG_ADRS (0x4555) +#define FLASH29_REG_FIFTH_CYCLE FLASH29_REG_ADRS (0x5aaa) +#define FLASH29_REG_SIXTH_CYCLE FLASH29_REG_ADRS (0x6555) + +/* FLASH29 command definitions */ + +#define FLASH29_CMD_FIRST 0xaaaaaaaa +#define FLASH29_CMD_SECOND 0x55555555 +#define FLASH29_CMD_FOURTH 0xaaaaaaaa +#define FLASH29_CMD_FIFTH 0x55555555 +#define FLASH29_CMD_SIXTH 0x10101010 + +#define FLASH29_CMD_SECTOR 0x30303030 +#define FLASH29_CMD_PROGRAM 0xa0a0a0a0 +#define FLASH29_CMD_CHIP_ERASE 0x80808080 +#define FLASH29_CMD_READ_RESET 0xf0f0f0f0 +#define FLASH29_CMD_AUTOSELECT 0x90909090 +#define FLASH29_CMD_READ 0x70707070 + +#define IN_RAM_CMD_READ 0x1 +#define IN_RAM_CMD_WRITE 0x2 + +#define FLASH_WRITE_CMD ((ulong)(flash_write_cmd) & 0x7)+0xbf008000 +#define FLASH_READ_CMD ((ulong)(flash_read_cmd) & 0x7)+0xbf008000 + +typedef void (*FUNCPTR_CP)(ulong *source, ulong *destination, ulong nlongs); +typedef void (*FUNCPTR_RD)(int cmd, FPWV * pFA, char * string, int strLen); +typedef void (*FUNCPTR_WR)(int cmd, FPWV * pFA, FPW value); + +static ulong flash_get_size(FPWV *addr, flash_info_t *info); +static int write_word(flash_info_t *info, FPWV *dest, FPW data); +static void flash_get_offsets(ulong base, flash_info_t *info); +static flash_info_t *flash_get_info(ulong base); + +static void load_cmd(ulong cmd); +static ulong in_ram_cmd = 0; + + +/****************************************************************************** +* +* Don't change the program architecture +* This architecture assure the program +* can be relocated to scratch ram +*/ +static void flash_read_cmd(int cmd, FPWV * pFA, char * string, int strLen) +{ + int i,j; + FPW temp,temp1; + FPWV *str; + + str = (FPWV *)string; + + j= strLen/4; + + if(cmd == FLASH29_CMD_AUTOSELECT) + { + *(FLASH29_REG_FIRST_CYCLE) = FLASH29_CMD_FIRST; + *(FLASH29_REG_SECOND_CYCLE) = FLASH29_CMD_SECOND; + *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_AUTOSELECT; + } + + if(cmd == FLASH29_CMD_READ) + { + i = 0; + while(i<j) + { + temp = *pFA++; + temp1 = *(int *)0xa0000000; + *(int *)0xbf0081f8 = temp1 + temp; + *str++ = temp; + i++; + } + } + + if(cmd == FLASH29_CMD_READ_RESET) + { + *(FLASH29_REG_FIRST_CYCLE) = FLASH29_CMD_FIRST; + *(FLASH29_REG_SECOND_CYCLE) = FLASH29_CMD_SECOND; + *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_READ_RESET; + } + + *(int *)0xbf0081f8 = *(int *)0xa0000000; /* dummy read switch back to sdram interface */ +} + +/****************************************************************************** +* +* Don't change the program architecture +* This architecture assure the program +* can be relocated to scratch ram +*/ +static void flash_write_cmd(int cmd, FPWV * pFA, FPW value) +{ + *(FLASH29_REG_FIRST_CYCLE) = FLASH29_CMD_FIRST; + *(FLASH29_REG_SECOND_CYCLE) = FLASH29_CMD_SECOND; + + if (cmd == FLASH29_CMD_SECTOR) + { + *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_CHIP_ERASE; + *(FLASH29_REG_FOURTH_CYCLE) = FLASH29_CMD_FOURTH; + *(FLASH29_REG_FIFTH_CYCLE) = FLASH29_CMD_FIFTH; + *pFA = FLASH29_CMD_SECTOR; + } + + if (cmd == FLASH29_CMD_SIXTH) + { + *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_CHIP_ERASE; + *(FLASH29_REG_FOURTH_CYCLE) = FLASH29_CMD_FOURTH; + *(FLASH29_REG_FIFTH_CYCLE) = FLASH29_CMD_FIFTH; + *(FLASH29_REG_SIXTH_CYCLE) = FLASH29_CMD_SIXTH; + } + + if (cmd == FLASH29_CMD_PROGRAM) + { + *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_PROGRAM; + *pFA = value; + } + + if (cmd == FLASH29_CMD_READ_RESET) + { + *(FLASH29_REG_THIRD_CYCLE) = FLASH29_CMD_READ_RESET; + } + + *(int *)0xbf0081f8 = *(int *)0xa0000000; /* dummy read switch back to sdram interface */ +} + +static void load_cmd(ulong cmd) +{ + ulong *src; + ulong *dst; + FUNCPTR_CP absEntry; + ulong func; + + if (in_ram_cmd & cmd) return; + + if (cmd == IN_RAM_CMD_READ) + { + func = (ulong)flash_read_cmd; + } + else + { + func = (ulong)flash_write_cmd; + } + + src = (ulong *)(func & 0xfffffff8); + dst = (ulong *)0xbf008000; + absEntry = (FUNCPTR_CP)(0xbf0081d0); + absEntry(src,dst,0x38); + + in_ram_cmd = cmd; +} + +/*----------------------------------------------------------------------- + * flash_init() + * + * sets up flash_info and returns size of FLASH (bytes) + */ +unsigned long flash_init (void) +{ + unsigned long size = 0; + int i; + + load_cmd(IN_RAM_CMD_READ); + + /* Init: no FLASHes known */ + for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) { + ulong flashbase = PHYS_FLASH_1; + ulong * buscon = (ulong *) INCA_IP_EBU_EBU_BUSCON0; + + /* Disable write protection */ + *buscon &= ~INCA_IP_EBU_EBU_BUSCON1_WRDIS; + +#if 1 + memset(&flash_info[i], 0, sizeof(flash_info_t)); +#endif + + flash_info[i].size = + flash_get_size((FPW *)flashbase, &flash_info[i]); + + if (flash_info[i].flash_id == FLASH_UNKNOWN) { + printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx\n", + i, flash_info[i].size); + } + + size += flash_info[i].size; + } + +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + /* monitor protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, + flash_get_info(CFG_MONITOR_BASE)); +#endif + +#ifdef CFG_ENV_IS_IN_FLASH + /* ENV protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR+CFG_ENV_SIZE-1, + flash_get_info(CFG_ENV_ADDR)); +#endif + + return size; +} + +/*----------------------------------------------------------------------- + */ +static void flash_get_offsets (ulong base, flash_info_t *info) +{ + int i; + + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD + && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM160B) { + + int bootsect_size[4]; /* number of bytes/boot sector */ + int sect_size; /* number of bytes/regular sector */ + + bootsect_size[0] = 0x00008000; + bootsect_size[1] = 0x00004000; + bootsect_size[2] = 0x00004000; + bootsect_size[3] = 0x00010000; + sect_size = 0x00020000; + + /* set sector offsets for bottom boot block type */ + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + base += i < 4 ? bootsect_size[i] : sect_size; + } + } +} + +/*----------------------------------------------------------------------- + */ + +static flash_info_t *flash_get_info(ulong base) +{ + int i; + flash_info_t * info; + + for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) { + info = & flash_info[i]; + if (info->start[0] <= base && base < info->start[0] + info->size) + break; + } + + return i == CFG_MAX_FLASH_BANKS ? 0 : info; +} + +/*----------------------------------------------------------------------- + */ + +void flash_print_info (flash_info_t *info) +{ + int i; + uchar *boottype; + uchar *bootletter; + uchar *fmt; + uchar botbootletter[] = "B"; + uchar topbootletter[] = "T"; + uchar botboottype[] = "bottom boot sector"; + uchar topboottype[] = "top boot sector"; + + if (info->flash_id == FLASH_UNKNOWN) { + printf ("missing or unknown FLASH type\n"); + return; + } + + switch (info->flash_id & FLASH_VENDMASK) { + case FLASH_MAN_AMD: printf ("AMD "); break; + case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; + case FLASH_MAN_FUJ: printf ("FUJITSU "); break; + case FLASH_MAN_SST: printf ("SST "); break; + case FLASH_MAN_STM: printf ("STM "); break; + case FLASH_MAN_INTEL: printf ("INTEL "); break; + default: printf ("Unknown Vendor "); break; + } + + /* check for top or bottom boot, if it applies */ + if (info->flash_id & FLASH_BTYPE) { + boottype = botboottype; + bootletter = botbootletter; + } + else { + boottype = topboottype; + bootletter = topbootletter; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM160B: + fmt = "29LV160B%s (16 Mbit, %s)\n"; + break; + case FLASH_28F800C3B: + case FLASH_28F800C3T: + fmt = "28F800C3%s (8 Mbit, %s)\n"; + break; + case FLASH_INTEL800B: + case FLASH_INTEL800T: + 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; + int rcode = 0; + 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 && rcode == 0; 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)) <= CFG_FLASH_ERASE_TOUT) { + + /* show that we're waiting */ + if ((get_timer(last)) > CFG_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 rcode; +} + +/*----------------------------------------------------------------------- + * 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); +} |