| /* |
| * (C) Copyright 2001 |
| * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. |
| * Based on code by: |
| * 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 <ppc4xx.h> |
| #include <asm/processor.h> |
| |
| #include <watchdog.h> |
| |
| flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
| |
| /*----------------------------------------------------------------------- |
| * Functions |
| */ |
| static ulong flash_get_size (vu_long *addr, flash_info_t *info); |
| static int write_word8(flash_info_t *info, ulong dest, ulong data); |
| static int write_word32 (flash_info_t *info, ulong dest, ulong data); |
| static void flash_get_offsets (ulong base, flash_info_t *info); |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| unsigned long flash_init (void) |
| { |
| int i; |
| unsigned long size_b0, base_b0; |
| unsigned long size_b1, base_b1; |
| |
| /* Init: no FLASHes known */ |
| for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) { |
| flash_info[i].flash_id = FLASH_UNKNOWN; |
| } |
| |
| /* Get Size of Boot and Main Flashes */ |
| size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]); |
| if (flash_info[0].flash_id == FLASH_UNKNOWN) { |
| printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", |
| size_b0, size_b0<<20); |
| return 0; |
| } |
| size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]); |
| if (flash_info[1].flash_id == FLASH_UNKNOWN) { |
| printf ("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n", |
| size_b1, size_b1<<20); |
| return 0; |
| } |
| |
| /* Calculate base addresses */ |
| base_b0 = -size_b0; |
| base_b1 = -size_b1; |
| |
| /* Setup offsets for Boot Flash */ |
| flash_get_offsets (base_b0, &flash_info[0]); |
| |
| /* Protect board level data */ |
| (void)flash_protect(FLAG_PROTECT_SET, |
| base_b0, |
| flash_info[0].start[1] - 1, |
| &flash_info[0]); |
| |
| |
| /* Monitor protection ON by default */ |
| (void)flash_protect(FLAG_PROTECT_SET, |
| base_b0 + size_b0 - CFG_MONITOR_LEN, |
| base_b0 + size_b0 - 1, |
| &flash_info[0]); |
| |
| /* Protect the FPGA image */ |
| (void)flash_protect(FLAG_PROTECT_SET, |
| FLASH_BASE1_PRELIM, |
| FLASH_BASE1_PRELIM + CFG_FPGA_IMAGE_LEN - 1, |
| &flash_info[1]); |
| |
| /* Protect the default boot image */ |
| (void)flash_protect(FLAG_PROTECT_SET, |
| FLASH_BASE1_PRELIM + CFG_FPGA_IMAGE_LEN, |
| FLASH_BASE1_PRELIM + CFG_FPGA_IMAGE_LEN + 0x600000 - 1, |
| &flash_info[1]); |
| |
| /* Setup offsets for Main Flash */ |
| flash_get_offsets (FLASH_BASE1_PRELIM, &flash_info[1]); |
| |
| return (size_b0 + size_b1); |
| } /* end flash_init() */ |
| |
| /*----------------------------------------------------------------------- |
| */ |
| static void flash_get_offsets (ulong base, flash_info_t *info) |
| { |
| int i; |
| |
| /* set up sector start address table - FOR BOOT ROM ONLY!!! */ |
| if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) { |
| for (i = 0; i < info->sector_count; i++) |
| info->start[i] = base + (i * 0x00010000); |
| } |
| } /* end flash_get_offsets() */ |
| |
| /*----------------------------------------------------------------------- |
| */ |
| 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 ("1 x AMD "); break; |
| case FLASH_MAN_STM: printf ("1 x STM "); break; |
| case FLASH_MAN_INTEL: printf ("2 x Intel "); break; |
| default: printf ("Unknown Vendor "); |
| } |
| |
| switch (info->flash_id & FLASH_TYPEMASK) { |
| case FLASH_AM040: |
| if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) |
| printf ("AM29LV040 (4096 Kbit, uniform sector size)\n"); |
| else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM) |
| printf ("M29W040B (4096 Kbit, uniform block size)\n"); |
| else |
| printf ("UNKNOWN 29x040x (4096 Kbit, uniform sector size)\n"); |
| break; |
| case FLASH_28F320J3A: |
| printf ("28F320J3A (32 Mbit = 128K x 32)\n"); |
| break; |
| case FLASH_28F640J3A: |
| printf ("28F640J3A (64 Mbit = 128K x 64)\n"); |
| break; |
| case FLASH_28F128J3A: |
| printf ("28F128J3A (128 Mbit = 128K x 128)\n"); |
| break; |
| default: |
| printf ("Unknown Chip Type\n"); |
| } |
| |
| if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM) { |
| printf (" Size: %ld KB in %d Blocks\n", |
| info->size >> 10, info->sector_count); |
| } else { |
| 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"); |
| } /* end flash_print_info() */ |
| |
| /* |
| * The following code cannot be run from FLASH! |
| */ |
| static ulong flash_get_size (vu_long *addr, flash_info_t *info) |
| { |
| short i; |
| ulong base = (ulong)addr; |
| |
| /* Setup default type */ |
| info->flash_id = FLASH_UNKNOWN; |
| info->sector_count =0; |
| info->size = 0; |
| |
| /* Test for Boot Flash */ |
| if (base == FLASH_BASE0_PRELIM) { |
| unsigned char value; |
| volatile unsigned char * addr2 = (unsigned char *)addr; |
| |
| /* Write auto select command: read Manufacturer ID */ |
| *(addr2 + 0x555) = 0xaa; |
| *(addr2 + 0x2aa) = 0x55; |
| *(addr2 + 0x555) = 0x90; |
| |
| /* Manufacture ID */ |
| value = *addr2; |
| switch (value) { |
| case (unsigned char)AMD_MANUFACT: |
| info->flash_id = FLASH_MAN_AMD; |
| break; |
| case (unsigned char)STM_MANUFACT: |
| info->flash_id = FLASH_MAN_STM; |
| break; |
| default: |
| *addr2 = 0xf0; /* no or unknown flash */ |
| return 0; |
| } |
| |
| /* Device ID */ |
| value = *(addr2 + 1); |
| switch (value) { |
| case (unsigned char)AMD_ID_LV040B: |
| case (unsigned char)STM_ID_29W040B: |
| info->flash_id += FLASH_AM040; |
| info->sector_count = 8; |
| info->size = 0x00080000; |
| break; /* => 512Kb */ |
| default: |
| *addr2 = 0xf0; /* => no or unknown flash */ |
| return 0; |
| } |
| } |
| else { /* MAIN Flash */ |
| unsigned long value; |
| volatile unsigned long * addr2 = (unsigned long *)addr; |
| |
| /* Write auto select command: read Manufacturer ID */ |
| *addr2 = 0x90909090; |
| |
| /* Manufacture ID */ |
| value = *addr2; |
| switch (value) { |
| case (unsigned long)INTEL_MANUFACT: |
| info->flash_id = FLASH_MAN_INTEL; |
| break; |
| default: |
| *addr2 = 0xff; /* no or unknown flash */ |
| return 0; |
| } |
| |
| /* Device ID - This shit is interleaved... */ |
| value = *(addr2 + 1); |
| switch (value) { |
| case (unsigned long)INTEL_ID_28F320J3A: |
| info->flash_id += FLASH_28F320J3A; |
| info->sector_count = 32; |
| info->size = 0x00400000 * 2; |
| break; /* => 2 X 4 MB */ |
| case (unsigned long)INTEL_ID_28F640J3A: |
| info->flash_id += FLASH_28F640J3A; |
| info->sector_count = 64; |
| info->size = 0x00800000 * 2; |
| break; /* => 2 X 8 MB */ |
| case (unsigned long)INTEL_ID_28F128J3A: |
| info->flash_id += FLASH_28F128J3A; |
| info->sector_count = 128; |
| info->size = 0x01000000 * 2; |
| break; /* => 2 X 16 MB */ |
| default: |
| *addr2 = 0xff; /* => no or unknown flash */ |
| } |
| } |
| |
| /* Make sure we don't exceed CFG_MAX_FLASH_SECT */ |
| if (info->sector_count > CFG_MAX_FLASH_SECT) { |
| printf ("** ERROR: sector count %d > max (%d) **\n", |
| info->sector_count, CFG_MAX_FLASH_SECT); |
| info->sector_count = CFG_MAX_FLASH_SECT; |
| } |
| |
| /* set up sector start address table */ |
| switch (info->flash_id & FLASH_TYPEMASK) { |
| case FLASH_AM040: |
| for (i = 0; i < info->sector_count; i++) |
| info->start[i] = base + (i * 0x00010000); |
| break; |
| case FLASH_28F320J3A: |
| case FLASH_28F640J3A: |
| case FLASH_28F128J3A: |
| for (i = 0; i < info->sector_count; i++) |
| info->start[i] = base + (i * 0x00020000 * 2); /* 2 Banks */ |
| break; |
| } |
| |
| /* Test for Boot Flash */ |
| if (base == FLASH_BASE0_PRELIM) { |
| volatile unsigned char *addr2; |
| /* check for protected sectors */ |
| for (i = 0; i < info->sector_count; i++) { |
| /* read sector protection at sector address, (AX .. A0) = 0x02 */ |
| /* D0 = 1 if protected */ |
| addr2 = (volatile unsigned char *)(info->start[i]); |
| info->protect[i] = *(addr2 + 2) & 1; |
| } |
| |
| /* Restore read mode */ |
| *(unsigned char *)base = 0xF0; /* Reset NORMAL Flash */ |
| } |
| else { /* Main Flash */ |
| volatile unsigned long *addr2; |
| /* check for protected sectors */ |
| for (i = 0; i < info->sector_count; i++) { |
| /* read sector protection at sector address, (AX .. A0) = 0x02 */ |
| /* D0 = 1 if protected */ |
| addr2 = (volatile unsigned long *)(info->start[i]); |
| info->protect[i] = *(addr2 + 2) & 0x1; |
| } |
| |
| /* Restore read mode */ |
| *(unsigned long *)base = 0xFFFFFFFF; /* Reset Flash */ |
| } |
| |
| return (info->size); |
| } /* end flash_get_size() */ |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| static int wait_for_DQ7(ulong addr, uchar cmp_val, ulong tout) |
| { |
| int i; |
| |
| volatile uchar *vaddr = (uchar *)addr; |
| |
| /* Loop X times */ |
| for (i = 1; i <= (100 * tout); i++) { /* Wait up to tout ms */ |
| udelay(10); |
| /* Pause 10 us */ |
| |
| /* Check for completion */ |
| if ((vaddr[0] & 0x80) == (cmp_val & 0x80)) { |
| return 0; |
| } |
| |
| /* KEEP THE LUSER HAPPY - Print a dot every 1.1 seconds */ |
| if (!(i % 110000)) |
| putc('.'); |
| |
| /* Kick the dog if needed */ |
| WATCHDOG_RESET(); |
| } |
| |
| return 1; |
| } /* wait_for_DQ7() */ |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |
| static int flash_erase8(flash_info_t *info, int s_first, int s_last) |
| { |
| int tcode, rcode = 0; |
| volatile uchar *addr = (uchar *)(info->start[0]); |
| volatile uchar *sector_addr; |
| int flag, prot, sect; |
| |
| /* Validate arguments */ |
| 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; |
| } |
| |
| /* Check for KNOWN flash type */ |
| if (info->flash_id == FLASH_UNKNOWN) { |
| printf ("Can't erase unknown flash type - aborted\n"); |
| return 1; |
| } |
| |
| /* Check for protected sectors */ |
| 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"); |
| |
| /* Start erase on unprotected sectors */ |
| for (sect = s_first; sect <= s_last; sect++) { |
| if (info->protect[sect] == 0) { /* not protected */ |
| sector_addr = (uchar *)(info->start[sect]); |
| |
| if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM) |
| printf("Erasing block %p\n", sector_addr); |
| else |
| printf("Erasing sector %p\n", sector_addr); |
| |
| /* Disable interrupts which might cause Flash to timeout */ |
| flag = disable_interrupts(); |
| |
| *(addr + 0x555) = (uchar)0xAA; |
| *(addr + 0x2aa) = (uchar)0x55; |
| *(addr + 0x555) = (uchar)0x80; |
| *(addr + 0x555) = (uchar)0xAA; |
| *(addr + 0x2aa) = (uchar)0x55; |
| *sector_addr = (uchar)0x30; /* sector erase */ |
| |
| /* |
| * 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)!! |
| * Takes up to 6 seconds. |
| */ |
| tcode = wait_for_DQ7((ulong)sector_addr, 0x80, 6000); |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* Make sure we didn't timeout */ |
| if (tcode) { |
| printf ("Timeout\n"); |
| rcode = 1; |
| } |
| } |
| } |
| |
| /* wait at least 80us - let's wait 1 ms */ |
| udelay (1000); |
| |
| /* reset to read mode */ |
| addr = (uchar *)info->start[0]; |
| *addr = (uchar)0xF0; /* reset bank */ |
| |
| printf (" done\n"); |
| return rcode; |
| } /* end flash_erase8() */ |
| |
| static int flash_erase32(flash_info_t *info, int s_first, int s_last) |
| { |
| int flag, sect; |
| ulong start, now, last; |
| int prot = 0; |
| |
| /* Validate arguments */ |
| 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; |
| } |
| |
| /* Check for KNOWN flash type */ |
| if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) { |
| printf ("Can erase only Intel flash types - aborted\n"); |
| return 1; |
| } |
| |
| /* Check for protected sectors */ |
| 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"); |
| |
| start = get_timer (0); |
| last = start; |
| /* Start erase on unprotected sectors */ |
| for (sect = s_first; sect <= s_last; sect++) { |
| WATCHDOG_RESET(); |
| if (info->protect[sect] == 0) { /* not protected */ |
| vu_long *addr = (vu_long *)(info->start[sect]); |
| unsigned long status; |
| |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| *addr = 0x00500050; /* clear status register */ |
| *addr = 0x00200020; /* erase setup */ |
| *addr = 0x00D000D0; /* erase confirm */ |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* Wait at least 80us - let's wait 1 ms */ |
| udelay (1000); |
| |
| while (((status = *addr) & 0x00800080) != 0x00800080) { |
| if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
| printf ("Timeout\n"); |
| *addr = 0x00B000B0; /* suspend erase */ |
| *addr = 0x00FF00FF; /* reset to read mode */ |
| return 1; |
| } |
| |
| /* show that we're waiting */ |
| if ((now - last) > 990) { /* every second */ |
| putc ('.'); |
| last = now; |
| } |
| } |
| *addr = 0x00FF00FF; /* reset to read mode */ |
| } |
| } |
| printf (" done\n"); |
| return 0; |
| } /* end flash_erase32() */ |
| |
| int flash_erase(flash_info_t *info, int s_first, int s_last) |
| { |
| if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) |
| return flash_erase8(info, s_first, s_last); |
| else |
| return flash_erase32(info, s_first, s_last); |
| } /* end flash_erase() */ |
| |
| /*----------------------------------------------------------------------- |
| * Copy memory to flash, returns: |
| * 0 - OK |
| * 1 - write timeout |
| * 2 - Flash not erased |
| */ |
| static int write_buff8(flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| { |
| ulong cp, wp, data; |
| ulong start; |
| int i, l, rc; |
| |
| start = get_timer (0); |
| |
| 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_word8(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_word8(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += 4; |
| cnt -= 4; |
| if (get_timer(start) > 1000) { /* every second */ |
| WATCHDOG_RESET(); |
| putc ('.'); |
| start = get_timer(0); |
| } |
| } |
| |
| 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_word8(info, wp, data)); |
| } /* end write_buff8() */ |
| |
| #define FLASH_WIDTH 4 /* flash bus width in bytes */ |
| static int write_buff32 (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| { |
| ulong cp, wp, data; |
| int i, l, rc; |
| ulong start; |
| |
| start = get_timer (0); |
| |
| if (info->flash_id == FLASH_UNKNOWN) { |
| return 4; |
| } |
| |
| wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) { |
| data = (data << 8) | *src++; |
| --cnt; |
| ++cp; |
| } |
| for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| if ((rc = write_word32(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += FLASH_WIDTH; |
| } |
| |
| /* |
| * handle FLASH_WIDTH aligned part |
| */ |
| while (cnt >= FLASH_WIDTH) { |
| data = 0; |
| for (i=0; i<FLASH_WIDTH; ++i) { |
| data = (data << 8) | *src++; |
| } |
| if ((rc = write_word32(info, wp, data)) != 0) { |
| return (rc); |
| } |
| wp += FLASH_WIDTH; |
| cnt -= FLASH_WIDTH; |
| if (get_timer(start) > 990) { /* every second */ |
| putc ('.'); |
| start = get_timer(0); |
| } |
| } |
| |
| if (cnt == 0) { |
| return (0); |
| } |
| |
| /* |
| * handle unaligned tail bytes |
| */ |
| data = 0; |
| for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) { |
| data = (data << 8) | *src++; |
| --cnt; |
| } |
| for (; i<FLASH_WIDTH; ++i, ++cp) { |
| data = (data << 8) | (*(uchar *)cp); |
| } |
| |
| return (write_word32(info, wp, data)); |
| } /* write_buff32() */ |
| |
| int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
| { |
| int retval; |
| |
| if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) |
| retval = write_buff8(info, src, addr, cnt); |
| else |
| retval = write_buff32(info, src, addr, cnt); |
| |
| return retval; |
| } /* end write_buff() */ |
| |
| /*----------------------------------------------------------------------- |
| * Write a word to Flash, returns: |
| * 0 - OK |
| * 1 - write timeout |
| * 2 - Flash not erased |
| */ |
| |
| static int write_word8(flash_info_t *info, ulong dest, ulong data) |
| { |
| volatile uchar *addr2 = (uchar *)(info->start[0]); |
| volatile uchar *dest2 = (uchar *)dest; |
| volatile uchar *data2 = (uchar *)&data; |
| int flag; |
| int i, tcode, rcode = 0; |
| |
| /* Check if Flash is (sufficently) erased */ |
| if ((*((volatile uchar *)dest) & |
| (uchar)data) != (uchar)data) { |
| return (2); |
| } |
| |
| for (i=0; i < (4 / sizeof(uchar)); i++) { |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| *(addr2 + 0x555) = (uchar)0xAA; |
| *(addr2 + 0x2aa) = (uchar)0x55; |
| *(addr2 + 0x555) = (uchar)0xA0; |
| |
| dest2[i] = data2[i]; |
| |
| /* Wait for write to complete, up to 1ms */ |
| tcode = wait_for_DQ7((ulong)&dest2[i], data2[i], 1); |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| /* Make sure we didn't timeout */ |
| if (tcode) { |
| rcode = 1; |
| } |
| } |
| |
| return rcode; |
| } /* end write_word8() */ |
| |
| static int write_word32(flash_info_t *info, ulong dest, ulong data) |
| { |
| vu_long *addr = (vu_long *)dest; |
| ulong status; |
| ulong start; |
| int flag; |
| |
| /* Check if Flash is (sufficiently) erased */ |
| if ((*addr & data) != data) { |
| return (2); |
| } |
| /* Disable interrupts which might cause a timeout here */ |
| flag = disable_interrupts(); |
| |
| *addr = 0x00400040; /* write setup */ |
| *addr = data; |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| start = get_timer (0); |
| |
| while (((status = *addr) & 0x00800080) != 0x00800080) { |
| WATCHDOG_RESET(); |
| if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
| *addr = 0x00FF00FF; /* restore read mode */ |
| return (1); |
| } |
| } |
| |
| *addr = 0x00FF00FF; /* restore read mode */ |
| |
| return (0); |
| } /* end write_word32() */ |
| |
| |
| static int _flash_protect(flash_info_t *info, long sector) |
| { |
| int i; |
| int flag; |
| ulong status; |
| int rcode = 0; |
| volatile long *addr = (unsigned long *)sector; |
| |
| switch(info->flash_id & FLASH_TYPEMASK) { |
| case FLASH_28F320J3A: |
| case FLASH_28F640J3A: |
| case FLASH_28F128J3A: |
| /* Disable interrupts which might cause Flash to timeout */ |
| flag = disable_interrupts(); |
| |
| /* Issue command */ |
| *addr = 0x00500050L; /* Clear the status register */ |
| *addr = 0x00600060L; /* Set lock bit setup */ |
| *addr = 0x00010001L; /* Set lock bit confirm */ |
| |
| /* Wait for command completion */ |
| for (i = 0; i < 10; i++) { /* 75us timeout, wait 100us */ |
| udelay(10); |
| if ((*addr & 0x00800080L) == 0x00800080L) |
| break; |
| } |
| |
| /* Not successful? */ |
| status = *addr; |
| if (status != 0x00800080L) { |
| printf("Protect %x sector failed: %x\n", |
| (uint)sector, (uint)status); |
| rcode = 1; |
| } |
| |
| /* Restore read mode */ |
| *addr = 0x00ff00ffL; |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| break; |
| case FLASH_AM040: /* No soft sector protection */ |
| break; |
| } |
| |
| /* Turn protection on for this sector */ |
| for (i = 0; i < info->sector_count; i++) { |
| if (info->start[i] == sector) { |
| info->protect[i] = 1; |
| break; |
| } |
| } |
| |
| return rcode; |
| } /* end _flash_protect() */ |
| |
| static int _flash_unprotect(flash_info_t *info, long sector) |
| { |
| int i; |
| int flag; |
| ulong status; |
| int rcode = 0; |
| volatile long *addr = (unsigned long *)sector; |
| |
| switch(info->flash_id & FLASH_TYPEMASK) { |
| case FLASH_28F320J3A: |
| case FLASH_28F640J3A: |
| case FLASH_28F128J3A: |
| /* Disable interrupts which might cause Flash to timeout */ |
| flag = disable_interrupts(); |
| |
| *addr = 0x00500050L; /* Clear the status register */ |
| *addr = 0x00600060L; /* Clear lock bit setup */ |
| *addr = 0x00D000D0L; /* Clear lock bit confirm */ |
| |
| /* Wait for command completion */ |
| for (i = 0; i < 80 ; i++) { /* 700ms timeout, wait 800 */ |
| udelay(10000); /* Delay 10ms */ |
| if ((*addr & 0x00800080L) == 0x00800080L) |
| break; |
| } |
| |
| /* Not successful? */ |
| status = *addr; |
| if (status != 0x00800080L) { |
| printf("Un-protect %x sector failed: %x\n", |
| (uint)sector, (uint)status); |
| *addr = 0x00ff00ffL; |
| rcode = 1; |
| } |
| |
| /* restore read mode */ |
| *addr = 0x00ff00ffL; |
| |
| /* re-enable interrupts if necessary */ |
| if (flag) |
| enable_interrupts(); |
| |
| break; |
| case FLASH_AM040: /* No soft sector protection */ |
| break; |
| } |
| |
| /* |
| * Fix Intel's little red wagon. Reprotect |
| * sectors that were protected before we undid |
| * protection on a specific sector. |
| */ |
| for (i = 0; i < info->sector_count; i++) { |
| if (info->start[i] != sector) { |
| if (info->protect[i]) { |
| if (_flash_protect(info, info->start[i])) |
| rcode = 1; |
| } |
| } |
| else /* Turn protection off for this sector */ |
| info->protect[i] = 0; |
| } |
| |
| return rcode; |
| } /* end _flash_unprotect() */ |
| |
| |
| int flash_real_protect(flash_info_t *info, long sector, int prot) |
| { |
| int rcode; |
| |
| if (prot) |
| rcode = _flash_protect(info, info->start[sector]); |
| else |
| rcode = _flash_unprotect(info, info->start[sector]); |
| |
| return rcode; |
| } /* end flash_real_protect() */ |
| |
| /*----------------------------------------------------------------------- |
| */ |
| |