| /* |
| * (C) Copyright 2000 |
| * 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 <mpc824x.h> |
| #include <asm/processor.h> |
| #include <asm/pci_io.h> |
| |
| #define ROM_CS0_START 0xFF800000 |
| #define ROM_CS1_START 0xFF000000 |
| |
| flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
| |
| #if defined(CFG_ENV_IS_IN_FLASH) |
| # ifndef CFG_ENV_ADDR |
| # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) |
| # endif |
| # ifndef CFG_ENV_SIZE |
| # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE |
| # endif |
| # ifndef CFG_ENV_SECT_SIZE |
| # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE |
| # endif |
| #endif |
| |
| /*----------------------------------------------------------------------- |
| * Functions |
| */ |
| static int write_word (flash_info_t *info, ulong dest, ulong data); |
| #if 0 |
| static void flash_get_offsets (ulong base, flash_info_t *info); |
| #endif /* 0 */ |
| |
| /*flash command address offsets*/ |
| |
| #if 0 |
| #define ADDR0 (0x555) |
| #define ADDR1 (0x2AA) |
| #define ADDR3 (0x001) |
| #else |
| #define ADDR0 (0xAAA) |
| #define ADDR1 (0x555) |
| #define ADDR3 (0x001) |
| #endif |
| |
| #define FLASH_WORD_SIZE unsigned char |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| #if 0 |
| static int byte_parity_odd(unsigned char x) __attribute__ ((const)); |
| #endif /* 0 */ |
| static unsigned long flash_id(unsigned char mfct, unsigned char chip) __attribute__ ((const)); |
| |
| typedef struct |
| { |
| FLASH_WORD_SIZE extval; |
| unsigned short intval; |
| } map_entry; |
| |
| #if 0 |
| static int |
| byte_parity_odd(unsigned char x) |
| { |
| x ^= x >> 4; |
| x ^= x >> 2; |
| x ^= x >> 1; |
| return (x & 0x1) != 0; |
| } |
| #endif /* 0 */ |
| |
| |
| |
| static unsigned long |
| flash_id(unsigned char mfct, unsigned char chip) |
| { |
| static const map_entry mfct_map[] = |
| { |
| {(FLASH_WORD_SIZE) AMD_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_AMD >> 16)}, |
| {(FLASH_WORD_SIZE) FUJ_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_FUJ >> 16)}, |
| {(FLASH_WORD_SIZE) STM_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_STM >> 16)}, |
| {(FLASH_WORD_SIZE) MT_MANUFACT, (unsigned short) ((unsigned long) FLASH_MAN_MT >> 16)}, |
| {(FLASH_WORD_SIZE) INTEL_MANUFACT,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)}, |
| {(FLASH_WORD_SIZE) INTEL_ALT_MANU,(unsigned short) ((unsigned long) FLASH_MAN_INTEL >> 16)} |
| }; |
| |
| static const map_entry chip_map[] = |
| { |
| {AMD_ID_F040B, FLASH_AM040}, |
| {(FLASH_WORD_SIZE) STM_ID_x800AB, FLASH_STM800AB} |
| }; |
| |
| const map_entry *p; |
| unsigned long result = FLASH_UNKNOWN; |
| |
| /* find chip id */ |
| for(p = &chip_map[0]; p < &chip_map[sizeof chip_map / sizeof chip_map[0]]; p++) |
| if(p->extval == chip) |
| { |
| result = FLASH_VENDMASK | p->intval; |
| break; |
| } |
| |
| /* find vendor id */ |
| for(p = &mfct_map[0]; p < &mfct_map[sizeof mfct_map / sizeof mfct_map[0]]; p++) |
| if(p->extval == mfct) |
| { |
| result &= ~FLASH_VENDMASK; |
| result |= (unsigned long) p->intval << 16; |
| break; |
| } |
| |
| return result; |
| } |
| |
| |
| |
| unsigned long |
| flash_init(void) |
| { |
| unsigned long i; |
| unsigned char j; |
| static const ulong flash_banks[] = CFG_FLASH_BANKS; |
| |
| /* Init: no FLASHes known */ |
| for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) |
| { |
| flash_info_t * const pflinfo = &flash_info[i]; |
| pflinfo->flash_id = FLASH_UNKNOWN; |
| pflinfo->size = 0; |
| pflinfo->sector_count = 0; |
| } |
| |
| for(i = 0; i < sizeof flash_banks / sizeof flash_banks[0]; i++) |
| { |
| flash_info_t * const pflinfo = &flash_info[i]; |
| const unsigned long base_address = flash_banks[i]; |
| volatile FLASH_WORD_SIZE * const flash = (FLASH_WORD_SIZE *) base_address; |
| #if 0 |
| volatile FLASH_WORD_SIZE * addr2; |
| #endif |
| #if 0 |
| /* write autoselect sequence */ |
| flash[0x5555] = 0xaa; |
| flash[0x2aaa] = 0x55; |
| flash[0x5555] = 0x90; |
| #else |
| flash[0xAAA << (3 * i)] = 0xaa; |
| flash[0x555 << (3 * i)] = 0x55; |
| flash[0xAAA << (3 * i)] = 0x90; |
| #endif |
| __asm__ __volatile__("sync"); |
| |
| #if 0 |
| pflinfo->flash_id = flash_id(flash[0x0], flash[0x1]); |
| #else |
| pflinfo->flash_id = flash_id(flash[0x0], flash[0x2 + 14 * i]); |
| #endif |
| |
| switch(pflinfo->flash_id & FLASH_TYPEMASK) |
| { |
| case FLASH_AM040: |
| pflinfo->size = 0x00080000; |
| pflinfo->sector_count = 8; |
| for(j = 0; j < 8; j++) |
| { |
| pflinfo->start[j] = base_address + 0x00010000 * j; |
| pflinfo->protect[j] = flash[(j << 16) | 0x2]; |
| } |
| break; |
| case FLASH_STM800AB: |
| pflinfo->size = 0x00100000; |
| pflinfo->sector_count = 19; |
| pflinfo->start[0] = base_address; |
| pflinfo->start[1] = base_address + 0x4000; |
| pflinfo->start[2] = base_address + 0x6000; |
| pflinfo->start[3] = base_address + 0x8000; |
| for(j = 1; j < 16; j++) |
| { |
| pflinfo->start[j+3] = base_address + 0x00010000 * j; |
| } |
| #if 0 |
| /* check for protected sectors */ |
| for (j = 0; j < pflinfo->sector_count; j++) { |
| /* read sector protection at sector address, (A7 .. A0) = 0x02 */ |
| /* D0 = 1 if protected */ |
| addr2 = (volatile FLASH_WORD_SIZE *)(pflinfo->start[j]); |
| if (pflinfo->flash_id & FLASH_MAN_SST) |
| pflinfo->protect[j] = 0; |
| else |
| pflinfo->protect[j] = addr2[2] & 1; |
| } |
| #endif |
| break; |
| } |
| /* Protect monitor and environment sectors |
| */ |
| #if CFG_MONITOR_BASE >= CFG_FLASH_BASE |
| flash_protect(FLAG_PROTECT_SET, |
| CFG_MONITOR_BASE, |
| CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, |
| &flash_info[0]); |
| #endif |
| |
| #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) |
| flash_protect(FLAG_PROTECT_SET, |
| CFG_ENV_ADDR, |
| CFG_ENV_ADDR + CFG_ENV_SIZE - 1, |
| &flash_info[0]); |
| #endif |
| |
| /* reset device to read mode */ |
| flash[0x0000] = 0xf0; |
| __asm__ __volatile__("sync"); |
| } |
| |
| return flash_info[0].size + flash_info[1].size; |
| } |
| |
| #if 0 |
| static void |
| flash_get_offsets (ulong base, flash_info_t *info) |
| { |
| int i; |
| |
| /* set up sector start address table */ |
| if (info->flash_id & FLASH_MAN_SST) |
| { |
| for (i = 0; i < info->sector_count; i++) |
| info->start[i] = base + (i * 0x00010000); |
| } |
| else |
| if (info->flash_id & FLASH_BTYPE) { |
| /* set sector offsets for bottom boot block type */ |
| info->start[0] = base + 0x00000000; |
| info->start[1] = base + 0x00004000; |
| info->start[2] = base + 0x00006000; |
| info->start[3] = base + 0x00008000; |
| for (i = 4; i < info->sector_count; i++) { |
| info->start[i] = base + (i * 0x00010000) - 0x00030000; |
| } |
| } else { |
| /* set sector offsets for top boot block type */ |
| i = info->sector_count - 1; |
| info->start[i--] = base + info->size - 0x00004000; |
| info->start[i--] = base + info->size - 0x00006000; |
| info->start[i--] = base + info->size - 0x00008000; |
| for (; i >= 0; i--) { |
| info->start[i] = base + i * 0x00010000; |
| } |
| } |
| |
| } |
| #endif /* 0 */ |
| |
| /*----------------------------------------------------------------------- |
| */ |
| void |
| flash_print_info(flash_info_t *info) |
| { |
| static const char unk[] = "Unknown"; |
| const char *mfct = unk, *type = unk; |
| unsigned int i; |
| |
| if(info->flash_id != FLASH_UNKNOWN) |
| { |
| switch(info->flash_id & FLASH_VENDMASK) |
| { |
| case FLASH_MAN_AMD: mfct = "AMD"; break; |
| case FLASH_MAN_FUJ: mfct = "FUJITSU"; break; |
| case FLASH_MAN_STM: mfct = "STM"; break; |
| case FLASH_MAN_SST: mfct = "SST"; break; |
| case FLASH_MAN_BM: mfct = "Bright Microelectonics"; break; |
| case FLASH_MAN_INTEL: mfct = "Intel"; break; |
| } |
| |
| switch(info->flash_id & FLASH_TYPEMASK) |
| { |
| case FLASH_AM040: type = "AM29F040B (512K * 8, uniform sector size)"; break; |
| case FLASH_AM400B: type = "AM29LV400B (4 Mbit, bottom boot sect)"; break; |
| case FLASH_AM400T: type = "AM29LV400T (4 Mbit, top boot sector)"; break; |
| case FLASH_AM800B: type = "AM29LV800B (8 Mbit, bottom boot sect)"; break; |
| case FLASH_AM800T: type = "AM29LV800T (8 Mbit, top boot sector)"; break; |
| case FLASH_AM160T: type = "AM29LV160T (16 Mbit, top boot sector)"; break; |
| case FLASH_AM320B: type = "AM29LV320B (32 Mbit, bottom boot sect)"; break; |
| case FLASH_AM320T: type = "AM29LV320T (32 Mbit, top boot sector)"; break; |
| case FLASH_STM800AB: type = "M29W800AB (8 Mbit, bottom boot sect)"; break; |
| case FLASH_SST800A: type = "SST39LF/VF800 (8 Mbit, uniform sector size)"; break; |
| case FLASH_SST160A: type = "SST39LF/VF160 (16 Mbit, uniform sector size)"; break; |
| } |
| } |
| |
| printf( |
| "\n Brand: %s Type: %s\n" |
| " Size: %lu KB in %d Sectors\n", |
| mfct, |
| type, |
| info->size >> 10, |
| info->sector_count |
| ); |
| |
| printf (" Sector Start Addresses:"); |
| |
| for (i = 0; i < info->sector_count; i++) |
| { |
| unsigned long size; |
| unsigned int erased; |
| unsigned long * flash = (unsigned long *) info->start[i]; |
| |
| /* |
| * Check if whole sector is erased |
| */ |
| size = |
| (i != (info->sector_count - 1)) ? |
| (info->start[i + 1] - info->start[i]) >> 2 : |
| (info->start[0] + info->size - info->start[i]) >> 2; |
| |
| for( |
| flash = (unsigned long *) info->start[i], erased = 1; |
| (flash != (unsigned long *) info->start[i] + size) && erased; |
| flash++ |
| ) |
| erased = *flash == ~0x0UL; |
| |
| printf( |
| "%s %08lX %s %s", |
| (i % 5) ? "" : "\n ", |
| info->start[i], |
| erased ? "E" : " ", |
| info->protect[i] ? "RO" : " " |
| ); |
| } |
| |
| puts("\n"); |
| return; |
| } |
| |
| #if 0 |
| |
| /* |
| * The following code cannot be run from FLASH! |
| */ |
| ulong |
| flash_get_size (vu_long *addr, flash_info_t *info) |
| { |
| short i; |
| FLASH_WORD_SIZE value; |
| ulong base = (ulong)addr; |
| volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr; |
| |
| printf("flash_get_size: \n"); |
| /* Write auto select command: read Manufacturer ID */ |
| eieio(); |
| addr2[ADDR0] = (FLASH_WORD_SIZE)0xAA; |
| addr2[ADDR1] = (FLASH_WORD_SIZE)0x55; |
| addr2[ADDR0] = (FLASH_WORD_SIZE)0x90; |
| value = addr2[0]; |
| |
| switch (value) { |
| case (FLASH_WORD_SIZE)AMD_MANUFACT: |
| info->flash_id = FLASH_MAN_AMD; |
| break; |
| case (FLASH_WORD_SIZE)FUJ_MANUFACT: |
| info->flash_id = FLASH_MAN_FUJ; |
| break; |
| case (FLASH_WORD_SIZE)SST_MANUFACT: |
| info->flash_id = FLASH_MAN_SST; |
| break; |
| default: |
| info->flash_id = FLASH_UNKNOWN; |
| info->sector_count = 0; |
| info->size = 0; |
| return (0); /* no or unknown flash */ |
| } |
| printf("recognised manufacturer"); |
| |
| value = addr2[ADDR3]; /* device ID */ |
| debug ("\ndev_code=%x\n", value); |
| |
| switch (value) { |
| case (FLASH_WORD_SIZE)AMD_ID_LV400T: |
| info->flash_id += FLASH_AM400T; |
| info->sector_count = 11; |
| info->size = 0x00080000; |
| break; /* => 0.5 MB */ |
| |
| case (FLASH_WORD_SIZE)AMD_ID_LV400B: |
| info->flash_id += FLASH_AM400B; |
| info->sector_count = 11; |
| info->size = 0x00080000; |
| break; /* => 0.5 MB */ |
| |
| case (FLASH_WORD_SIZE)AMD_ID_LV800T: |
| info->flash_id += FLASH_AM800T; |
| info->sector_count = 19; |
| info->size = 0x00100000; |
| break; /* => 1 MB */ |
| |
| case (FLASH_WORD_SIZE)AMD_ID_LV800B: |
| info->flash_id += FLASH_AM800B; |
| info->sector_count = 19; |
| info->size = 0x00100000; |
| break; /* => 1 MB */ |
| |
| case (FLASH_WORD_SIZE)AMD_ID_LV160T: |
| info->flash_id += FLASH_AM160T; |
| info->sector_count = 35; |
| info->size = 0x00200000; |
| break; /* => 2 MB */ |
| |
| case (FLASH_WORD_SIZE)AMD_ID_LV160B: |
| info->flash_id += FLASH_AM160B; |
| info->sector_count = 35; |
| info->size = 0x00200000; |
| break; /* => 2 MB */ |
| |
| case (FLASH_WORD_SIZE)SST_ID_xF800A: |
| info->flash_id += FLASH_SST800A; |
| info->sector_count = 16; |
| info->size = 0x00100000; |
| break; /* => 1 MB */ |
| |
| case (FLASH_WORD_SIZE)SST_ID_xF160A: |
| info->flash_id += FLASH_SST160A; |
| info->sector_count = 32; |
| info->size = 0x00200000; |
| break; /* => 2 MB */ |
| |
| case (FLASH_WORD_SIZE)AMD_ID_F040B: |
| info->flash_id += FLASH_AM040; |
| info->sector_count = 8; |
| info->size = 0x00080000; |
| break; /* => 0.5 MB */ |
| |
| default: |
| info->flash_id = FLASH_UNKNOWN; |
| return (0); /* => no or unknown flash */ |
| |
| } |
| |
| printf("flash id %lx; sector count %x, size %lx\n", info->flash_id,info->sector_count,info->size); |
| /* set up sector start address table */ |
| if (info->flash_id & FLASH_MAN_SST) |
| { |
| for (i = 0; i < info->sector_count; i++) |
| info->start[i] = base + (i * 0x00010000); |
| } |
| else |
| if (info->flash_id & FLASH_BTYPE) { |
| /* set sector offsets for bottom boot block type */ |
| info->start[0] = base + 0x00000000; |
| info->start[1] = base + 0x00004000; |
| info->start[2] = base + 0x00006000; |
| info->start[3] = base + 0x00008000; |
| for (i = 4; i < info->sector_count; i++) { |
| info->start[i] = base + (i * 0x00010000) - 0x00030000; |
| } |
| } else { |
| /* set sector offsets for top boot block type */ |
| i = info->sector_count - 1; |
| info->start[i--] = base + info->size - 0x00004000; |
| info->start[i--] = base + info->size - 0x00006000; |
| info->start[i--] = base + info->size - 0x00008000; |
| for (; i >= 0; i--) { |
| info->start[i] = base + i * 0x00010000; |
| } |
| } |
| |
| /* check for protected sectors */ |
| for (i = 0; i < info->sector_count; i++) { |
| /* read sector protection at sector address, (A7 .. A0) = 0x02 */ |
| /* D0 = 1 if protected */ |
| addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]); |
| if (info->flash_id & FLASH_MAN_SST) |
| info->protect[i] = 0; |
| else |
| info->protect[i] = addr2[2] & 1; |
| } |
| |
| /* |
| * Prevent writes to uninitialized FLASH. |
| */ |
| if (info->flash_id != FLASH_UNKNOWN) { |
| addr2 = (FLASH_WORD_SIZE *)info->start[0]; |
| *addr2 = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ |
| } |
| |
| return (info->size); |
| } |
| |
| #endif |
| |
| |
| int |
| flash_erase(flash_info_t *info, int s_first, int s_last) |
| { |
| volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]); |
| int flag, prot, sect, l_sect; |
| ulong start, now, last; |
| unsigned char sh8b; |
| |
| 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; |
| } |
| |
| if ((info->flash_id == FLASH_UNKNOWN) || |
| (info->flash_id > (FLASH_MAN_STM | FLASH_AMD_COMP))) { |
| printf ("Can't erase unknown flash type - aborted\n"); |
| 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"); |
| } |
| |
| l_sect = -1; |
| |
| /* Check the ROM CS */ |
| if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START)) |
| sh8b = 3; |
| else |
| sh8b = 0; |
| |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; |
| addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; |
| addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080; |
| addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; |
| addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; |
| |
| /* Start erase on unprotected sectors */ |
| for (sect = s_first; sect<=s_last; sect++) { |
| if (info->protect[sect] == 0) { /* not protected */ |
| addr = (FLASH_WORD_SIZE *)(info->start[0] + ( |
| (info->start[sect] - info->start[0]) << sh8b)); |
| if (info->flash_id & FLASH_MAN_SST) |
| { |
| addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; |
| addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; |
| addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00800080; |
| addr[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; |
| addr[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; |
| addr[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */ |
| udelay(30000); /* wait 30 ms */ |
| } |
| else |
| addr[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */ |
| l_sect = sect; |
| } |
| } |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* wait at least 80us - let's wait 1 ms */ |
| udelay (1000); |
| |
| /* |
| * We wait for the last triggered sector |
| */ |
| if (l_sect < 0) |
| goto DONE; |
| |
| start = get_timer (0); |
| last = start; |
| addr = (FLASH_WORD_SIZE *)(info->start[0] + ( |
| (info->start[l_sect] - info->start[0]) << sh8b)); |
| while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) { |
| if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
| printf ("Timeout\n"); |
| return 1; |
| } |
| /* show that we're waiting */ |
| if ((now - last) > 1000) { /* every second */ |
| serial_putc ('.'); |
| last = now; |
| } |
| } |
| |
| DONE: |
| /* reset to read mode */ |
| addr = (FLASH_WORD_SIZE *)info->start[0]; |
| addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */ |
| |
| 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) |
| { |
| ulong cp, wp, data; |
| int i, l, rc; |
| |
| wp = (addr & ~3); /* get lower word aligned address */ |
| |
| /* |
| * handle unaligned start bytes |
| */ |
| if ((l = addr - wp) != 0) { |
| data = 0; |
| for (i=0, cp=wp; i<l; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| for (; i<4 && cnt>0; ++i) { |
| data = (data << 8) | *src++; |
| --cnt; |
| ++cp; |
| } |
| for (; cnt==0 && i<4; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| if ((rc = write_word(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += 4; |
| } |
| |
| /* |
| * handle word aligned part |
| */ |
| while (cnt >= 4) { |
| data = 0; |
| for (i=0; i<4; ++i) { |
| data = (data << 8) | *src++; |
| } |
| if ((rc = write_word(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += 4; |
| cnt -= 4; |
| } |
| |
| if (cnt == 0) { |
| return (0); |
| } |
| |
| /* |
| * handle unaligned tail bytes |
| */ |
| data = 0; |
| for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { |
| data = (data << 8) | *src++; |
| --cnt; |
| } |
| for (; i<4; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| return (write_word(info, wp, data)); |
| } |
| |
| /*----------------------------------------------------------------------- |
| * Write a word to Flash, returns: |
| * 0 - OK |
| * 1 - write timeout |
| * 2 - Flash not erased |
| */ |
| static int write_word (flash_info_t *info, ulong dest, ulong data) |
| { |
| volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)info->start[0]; |
| volatile FLASH_WORD_SIZE *dest2; |
| volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *)&data; |
| ulong start; |
| int flag; |
| int i; |
| unsigned char sh8b; |
| |
| /* Check the ROM CS */ |
| if ((info->start[0] >= ROM_CS1_START) && (info->start[0] < ROM_CS0_START)) |
| sh8b = 3; |
| else |
| sh8b = 0; |
| |
| dest2 = (FLASH_WORD_SIZE *)(((dest - info->start[0]) << sh8b) + |
| info->start[0]); |
| |
| /* Check if Flash is (sufficiently) erased */ |
| if ((*dest2 & (FLASH_WORD_SIZE)data) != (FLASH_WORD_SIZE)data) { |
| return (2); |
| } |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| for (i=0; i<4/sizeof(FLASH_WORD_SIZE); i++) |
| { |
| addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00AA00AA; |
| addr2[ADDR1 << sh8b] = (FLASH_WORD_SIZE)0x00550055; |
| addr2[ADDR0 << sh8b] = (FLASH_WORD_SIZE)0x00A000A0; |
| |
| dest2[i << sh8b] = data2[i]; |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* data polling for D7 */ |
| start = get_timer (0); |
| while ((dest2[i << sh8b] & (FLASH_WORD_SIZE)0x00800080) != |
| (data2[i] & (FLASH_WORD_SIZE)0x00800080)) { |
| if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
| return (1); |
| } |
| } |
| } |
| |
| return (0); |
| } |
| |
| /*----------------------------------------------------------------------- |
| */ |