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Diffstat (limited to 'board/w7o/flash.c')
| -rw-r--r-- | board/w7o/flash.c | 941 |
1 files changed, 941 insertions, 0 deletions
diff --git a/board/w7o/flash.c b/board/w7o/flash.c new file mode 100644 index 0000000..0048476 --- /dev/null +++ b/board/w7o/flash.c @@ -0,0 +1,941 @@ +/* + * (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() */ + +/*----------------------------------------------------------------------- + */ + |