diff options
Diffstat (limited to 'board/amcc/common/flash.c')
-rw-r--r-- | board/amcc/common/flash.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/board/amcc/common/flash.c b/board/amcc/common/flash.c new file mode 100644 index 0000000000..7311c4edd5 --- /dev/null +++ b/board/amcc/common/flash.c @@ -0,0 +1,555 @@ +/* + * (C) Copyright 2004-2005 + * 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> + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +/*----------------------------------------------------------------------- + * Functions + */ +static int write_word(flash_info_t * info, ulong dest, ulong data); + +void flash_print_info(flash_info_t * info) +{ + int i; + int k; + int size; + int erased; + volatile unsigned long *flash; + + 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_STM: + printf("STM "); + break; + case FLASH_MAN_FUJ: + printf("FUJITSU "); + break; + case FLASH_MAN_SST: + printf("SST "); + break; + default: + printf("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM040: + printf("AM29F040 (512 Kbit, uniform sector size)\n"); + break; + case FLASH_AM400B: + printf("AM29LV400B (4 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM400T: + printf("AM29LV400T (4 Mbit, top boot sector)\n"); + break; + case FLASH_AM800B: + printf("AM29LV800B (8 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM800T: + printf("AM29LV800T (8 Mbit, top boot sector)\n"); + break; + case FLASH_AMD016: + printf("AM29F016D (16 Mbit, uniform sector size)\n"); + break; + case FLASH_AM160B: + printf("AM29LV160B (16 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM160T: + printf("AM29LV160T (16 Mbit, top boot sector)\n"); + break; + case FLASH_AM320B: + printf("AM29LV320B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM320T: + printf("AM29LV320T (32 Mbit, top boot sector)\n"); + break; + case FLASH_AM033C: + printf("AM29LV033C (32 Mbit, top boot sector)\n"); + break; + case FLASH_SST800A: + printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n"); + break; + case FLASH_SST160A: + printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n"); + break; + default: + printf("Unknown Chip Type\n"); + break; + } + + printf(" Size: %ld KB in %d Sectors\n", + info->size >> 10, info->sector_count); + + printf(" Sector Start Addresses:"); + for (i = 0; i < info->sector_count; ++i) { + /* + * Check if whole sector is erased + */ + if (i != (info->sector_count - 1)) + size = info->start[i + 1] - info->start[i]; + else + size = info->start[0] + info->size - info->start[i]; + erased = 1; + flash = (volatile unsigned long *)info->start[i]; + size = size >> 2; /* divide by 4 for longword access */ + for (k = 0; k < size; k++) { + if (*flash++ != 0xffffffff) { + erased = 0; + break; + } + } + + if ((i % 5) == 0) + printf("\n "); + printf(" %08lX%s%s", + info->start[i], + erased ? " E" : " ", info->protect[i] ? "RO " : " "); + } + printf("\n"); + return; +} + + +/* + * The following code cannot be run from FLASH! + */ +static ulong flash_get_size(vu_long * addr, flash_info_t * info) +{ + short i; + CFG_FLASH_WORD_SIZE value; + ulong base = (ulong) addr; + volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr; + + DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr); + + /* Write auto select command: read Manufacturer ID */ + addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA; + addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055; + addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090; + udelay(1000); + + value = addr2[0]; + DEBUGF("FLASH MANUFACT: %x\n", value); + + switch (value) { + case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT: + info->flash_id = FLASH_MAN_FUJ; + break; + case (CFG_FLASH_WORD_SIZE) SST_MANUFACT: + info->flash_id = FLASH_MAN_SST; + break; + case (CFG_FLASH_WORD_SIZE) STM_MANUFACT: + info->flash_id = FLASH_MAN_STM; + break; + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* no or unknown flash */ + } + + value = addr2[1]; /* device ID */ + + DEBUGF("\nFLASH DEVICEID: %x\n", value); + + switch (value) { + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV040B: + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x0080000; /* => 512 ko */ + break; + + case (CFG_FLASH_WORD_SIZE) AMD_ID_F040B: + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x0080000; /* => 512 ko */ + break; + + case (CFG_FLASH_WORD_SIZE) STM_ID_M29W040B: + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x0080000; /* => 512 ko */ + break; + + case (CFG_FLASH_WORD_SIZE) AMD_ID_F016D: + info->flash_id += FLASH_AMD016; + info->sector_count = 32; + info->size = 0x00200000; + break; /* => 2 MB */ + + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV033C: + info->flash_id += FLASH_AMDLV033C; + info->sector_count = 64; + info->size = 0x00400000; + break; /* => 4 MB */ + + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400T: + info->flash_id += FLASH_AM400T; + info->sector_count = 11; + info->size = 0x00080000; + break; /* => 0.5 MB */ + + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400B: + info->flash_id += FLASH_AM400B; + info->sector_count = 11; + info->size = 0x00080000; + break; /* => 0.5 MB */ + + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800T: + info->flash_id += FLASH_AM800T; + info->sector_count = 19; + info->size = 0x00100000; + break; /* => 1 MB */ + + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800B: + info->flash_id += FLASH_AM800B; + info->sector_count = 19; + info->size = 0x00100000; + break; /* => 1 MB */ + + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160T: + info->flash_id += FLASH_AM160T; + info->sector_count = 35; + info->size = 0x00200000; + break; /* => 2 MB */ + + case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160B: + info->flash_id += FLASH_AM160B; + info->sector_count = 35; + info->size = 0x00200000; + break; /* => 2 MB */ + + default: + info->flash_id = FLASH_UNKNOWN; + return (0); /* => no or unknown flash */ + } + + /* set up sector start address table */ + if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) || + ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) || + ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) { + 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 CFG_FLASH_WORD_SIZE *)(info->start[i]); + + /* For AMD29033C flash we need to resend the command of * + * reading flash protection for upper 8 Mb of flash */ + if (i == 32) { + addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA; + addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555; + addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090; + } + + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) + info->protect[i] = 0; + else + info->protect[i] = addr2[2] & 1; + } + + /* issue bank reset to return to read mode */ + addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0; + + return (info->size); +} + +int wait_for_DQ7(flash_info_t * info, int sect) +{ + ulong start, now, last; + volatile CFG_FLASH_WORD_SIZE *addr = + (CFG_FLASH_WORD_SIZE *) (info->start[sect]); + + start = get_timer(0); + last = start; + while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) != + (CFG_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 */ + putc('.'); + last = now; + } + } + return 0; +} + +int flash_erase(flash_info_t * info, int s_first, int s_last) +{ + volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]); + volatile CFG_FLASH_WORD_SIZE *addr2; + int flag, prot, sect, l_sect; + int i; + + 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) { + 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; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]); + + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) { + addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA; + addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055; + addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080; + addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA; + addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055; + addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050; /* block erase */ + for (i = 0; i < 50; i++) + udelay(1000); /* wait 1 ms */ + } else { + addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA; + addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055; + addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080; + addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA; + addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055; + addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030; /* sector erase */ + } + l_sect = sect; + /* + * Wait for each sector to complete, it's more + * reliable. According to AMD Spec, you must + * issue all erase commands within a specified + * timeout. This has been seen to fail, especially + * if printf()s are included (for debug)!! + */ + wait_for_DQ7(info, sect); + } + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* wait at least 80us - let's wait 1 ms */ + udelay(1000); + + /* reset to read mode */ + addr = (CFG_FLASH_WORD_SIZE *) info->start[0]; + addr[0] = (CFG_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 CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]); + volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest; + volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data; + ulong start; + int i; + + /* Check if Flash is (sufficiently) erased */ + if ((*((vu_long *)dest) & data) != data) { + return (2); + } + + for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) { + int flag; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA; + addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055; + addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0; + + dest2[i] = data2[i]; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* data polling for D7 */ + start = get_timer(0); + while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) != + (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) { + + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + return (1); + } + } + } + + return (0); +} |