diff options
Diffstat (limited to 'board/mx1fs2/flash.c')
| -rw-r--r-- | board/mx1fs2/flash.c | 849 |
1 files changed, 0 insertions, 849 deletions
diff --git a/board/mx1fs2/flash.c b/board/mx1fs2/flash.c deleted file mode 100644 index da4ebe6e75..0000000000 --- a/board/mx1fs2/flash.c +++ /dev/null @@ -1,849 +0,0 @@ -/* - * (C) 2000-2004 Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * (C) 2003 August Hoeraendl, Logotronic GmbH - * - * 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 - */ - -#undef CONFIG_FLASH_16BIT - -#include <common.h> - -#define FLASH_BANK_SIZE MX1FS2_FLASH_BANK_SIZE -#define MAIN_SECT_SIZE MX1FS2_FLASH_SECT_SIZE - -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ - -/* - * NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it - * has nothing to do with the flash chip being 8-bit or 16-bit. - */ -#ifdef CONFIG_FLASH_16BIT -typedef unsigned short FLASH_PORT_WIDTH; -typedef volatile unsigned short FLASH_PORT_WIDTHV; - -#define FLASH_ID_MASK 0xFFFF -#else -typedef unsigned long FLASH_PORT_WIDTH; -typedef volatile unsigned long FLASH_PORT_WIDTHV; - -#define FLASH_ID_MASK 0xFFFFFFFF -#endif - -#define FPW FLASH_PORT_WIDTH -#define FPWV FLASH_PORT_WIDTHV - -#define ORMASK(size) ((-size) & OR_AM_MSK) - -/*----------------------------------------------------------------------- - * Functions - */ -#if 0 -static ulong flash_get_size(FPWV * addr, flash_info_t * info); -static void flash_get_offsets(ulong base, flash_info_t * info); -#endif -static void flash_reset(flash_info_t * info); -static int write_word_intel(flash_info_t * info, FPWV * dest, FPW data); -static int write_word_amd(flash_info_t * info, FPWV * dest, FPW data); -#define write_word(in, de, da) write_word_amd(in, de, da) -#ifdef CONFIG_SYS_FLASH_PROTECTION -static void flash_sync_real_protect(flash_info_t * info); -#endif - -/*----------------------------------------------------------------------- - * flash_init() - * - * sets up flash_info and returns size of FLASH (bytes) - */ -ulong -flash_init(void) -{ - int i, j; - ulong size = 0; - - for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { - ulong flashbase = 0; - flash_info[i].flash_id = - (FLASH_MAN_AMD & FLASH_VENDMASK) | - (FLASH_AM640U & FLASH_TYPEMASK); - flash_info[i].size = FLASH_BANK_SIZE; - flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT; - memset(flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT); - switch (i) { - case 0: - flashbase = MX1FS2_FLASH_BASE; - break; - default: - panic("configured too many flash banks!\n"); - break; - } - for (j = 0; j < flash_info[i].sector_count; j++) { - flash_info[i].start[j] = flashbase + j * MAIN_SECT_SIZE; - } - size += flash_info[i].size; - } - - /* Protect monitor and environment sectors */ - flash_protect(FLAG_PROTECT_SET, - CONFIG_SYS_FLASH_BASE, - CONFIG_SYS_FLASH_BASE + _bss_start - _armboot_start, - &flash_info[0]); - - flash_protect(FLAG_PROTECT_SET, - CONFIG_ENV_ADDR, - CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); - - return size; -} - -/*----------------------------------------------------------------------- - */ -static void -flash_reset(flash_info_t * info) -{ - FPWV *base = (FPWV *) (info->start[0]); - - /* Put FLASH back in read mode */ - if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) - *base = (FPW) 0x00FF00FF; /* Intel Read Mode */ - else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) - *base = (FPW) 0x00F000F0; /* AMD Read Mode */ -} - -/*----------------------------------------------------------------------- - */ -#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_VENDMASK) == FLASH_MAN_INTEL - && (info->flash_id & FLASH_BTYPE)) { - int bootsect_size; /* number of bytes/boot sector */ - int sect_size; /* number of bytes/regular sector */ - - bootsect_size = 0x00002000 * (sizeof (FPW) / 2); - sect_size = 0x00010000 * (sizeof (FPW) / 2); - - /* set sector offsets for bottom boot block type */ - for (i = 0; i < 8; ++i) { - info->start[i] = base + (i * bootsect_size); - } - for (i = 8; i < info->sector_count; i++) { - info->start[i] = base + ((i - 7) * sect_size); - } - } else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD - && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) { - - int sect_size; /* number of bytes/sector */ - - sect_size = 0x00010000 * (sizeof (FPW) / 2); - - /* set up sector start address table (uniform sector type) */ - for (i = 0; i < info->sector_count; i++) - info->start[i] = base + (i * sect_size); - } -} -#endif /* 0 */ - -/*----------------------------------------------------------------------- - */ - -void -flash_print_info(flash_info_t * info) -{ - int i; - uchar *boottype; - uchar *bootletter; - char *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_AM640U: - fmt = "29LV641D (64 Mbit, uniform sectors)\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! - */ - -#if 0 -ulong -flash_get_size(FPWV * addr, flash_info_t * info) -{ - /* Write auto select command: read Manufacturer ID */ - - /* Write auto select command sequence and test FLASH answer */ - addr[0x0555] = (FPW) 0x00AA00AA; /* for AMD, Intel ignores this */ - addr[0x02AA] = (FPW) 0x00550055; /* for AMD, Intel ignores this */ - addr[0x0555] = (FPW) 0x00900090; /* selects Intel or AMD */ - - /* The manufacturer codes are only 1 byte, so just use 1 byte. - * This works for any bus width and any FLASH device width. - */ - switch (addr[0] & 0xff) { - - case (uchar) AMD_MANUFACT: - info->flash_id = FLASH_MAN_AMD; - break; - - case (uchar) INTEL_MANUFACT: - info->flash_id = FLASH_MAN_INTEL; - break; - - default: - info->flash_id = FLASH_UNKNOWN; - info->sector_count = 0; - info->size = 0; - break; - } - - /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */ - if (info->flash_id != FLASH_UNKNOWN) - switch (addr[1]) { - - case (FPW) AMD_ID_LV640U: /* 29LV640 and 29LV641 have same ID */ - info->flash_id += FLASH_AM640U; - info->sector_count = 128; - info->size = 0x00800000 * (sizeof (FPW) / 2); - break; /* => 8 or 16 MB */ - - case (FPW) INTEL_ID_28F800C3B: - info->flash_id += FLASH_28F800C3B; - info->sector_count = 23; - info->size = 0x00100000 * (sizeof (FPW) / 2); - break; /* => 1 or 2 MB */ - - case (FPW) INTEL_ID_28F800B3B: - info->flash_id += FLASH_INTEL800B; - info->sector_count = 23; - info->size = 0x00100000 * (sizeof (FPW) / 2); - break; /* => 1 or 2 MB */ - - case (FPW) INTEL_ID_28F160C3B: - info->flash_id += FLASH_28F160C3B; - info->sector_count = 39; - info->size = 0x00200000 * (sizeof (FPW) / 2); - break; /* => 2 or 4 MB */ - - case (FPW) INTEL_ID_28F160B3B: - info->flash_id += FLASH_INTEL160B; - info->sector_count = 39; - info->size = 0x00200000 * (sizeof (FPW) / 2); - break; /* => 2 or 4 MB */ - - case (FPW) INTEL_ID_28F320C3B: - info->flash_id += FLASH_28F320C3B; - info->sector_count = 71; - info->size = 0x00400000 * (sizeof (FPW) / 2); - break; /* => 4 or 8 MB */ - - case (FPW) INTEL_ID_28F320B3B: - info->flash_id += FLASH_INTEL320B; - info->sector_count = 71; - info->size = 0x00400000 * (sizeof (FPW) / 2); - break; /* => 4 or 8 MB */ - - case (FPW) INTEL_ID_28F640C3B: - info->flash_id += FLASH_28F640C3B; - info->sector_count = 135; - info->size = 0x00800000 * (sizeof (FPW) / 2); - break; /* => 8 or 16 MB */ - - case (FPW) INTEL_ID_28F640B3B: - info->flash_id += FLASH_INTEL640B; - info->sector_count = 135; - info->size = 0x00800000 * (sizeof (FPW) / 2); - 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); - - /* Put FLASH back in read mode */ - flash_reset(info); - - return (info->size); -} -#endif /* 0 */ - -#ifdef CONFIG_SYS_FLASH_PROTECTION -/*----------------------------------------------------------------------- - */ - -static void -flash_sync_real_protect(flash_info_t * info) -{ - FPWV *addr = (FPWV *) (info->start[0]); - FPWV *sect; - int i; - - switch (info->flash_id & FLASH_TYPEMASK) { - case FLASH_28F800C3B: - case FLASH_28F800C3T: - case FLASH_28F160C3B: - case FLASH_28F160C3T: - case FLASH_28F320C3B: - case FLASH_28F320C3T: - case FLASH_28F640C3B: - case FLASH_28F640C3T: - /* check for protected sectors */ - *addr = (FPW) 0x00900090; - for (i = 0; i < info->sector_count; i++) { - /* read sector protection at sector address, (A7 .. A0) = 0x02. - * D0 = 1 for each device if protected. - * If at least one device is protected the sector is marked - * protected, but mixed protected and unprotected devices - * within a sector should never happen. - */ - sect = (FPWV *) (info->start[i]); - info->protect[i] = - (sect[2] & (FPW) (0x00010001)) ? 1 : 0; - } - - /* Put FLASH back in read mode */ - flash_reset(info); - break; - - case FLASH_AM640U: - default: - /* no hardware protect that we support */ - break; - } -} -#endif - -/*----------------------------------------------------------------------- - */ - -int -flash_erase(flash_info_t * info, int s_first, int s_last) -{ - FPWV *addr; - int flag, prot, sect; - int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL; - ulong start, now, last; - int rcode = 0; - - 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_INTEL800B: - case FLASH_INTEL160B: - case FLASH_INTEL320B: - case FLASH_INTEL640B: - case FLASH_28F800C3B: - case FLASH_28F160C3B: - case FLASH_28F320C3B: - case FLASH_28F640C3B: - case FLASH_AM640U: - 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"); - } - - start = get_timer(0); - last = start; - - /* 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]); - if (intel) { - *addr = (FPW) 0x00500050; /* clear status register */ - *addr = (FPW) 0x00200020; /* erase setup */ - *addr = (FPW) 0x00D000D0; /* erase confirm */ - } else { - /* must be AMD style if not Intel */ - FPWV *base; /* first address in bank */ - - base = (FPWV *) (info->start[0]); - base[0x0555] = (FPW) 0x00AA00AA; /* unlock */ - base[0x02AA] = (FPW) 0x00550055; /* unlock */ - base[0x0555] = (FPW) 0x00800080; /* erase mode */ - base[0x0555] = (FPW) 0x00AA00AA; /* unlock */ - base[0x02AA] = (FPW) 0x00550055; /* unlock */ - *addr = (FPW) 0x00300030; /* erase sector */ - } - - /* re-enable interrupts if necessary */ - if (flag) - enable_interrupts(); - - /* wait at least 50us for AMD, 80us for Intel. - * Let's wait 1 ms. - */ - udelay(1000); - - while ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) { - if ((now = get_timer(0)) - start > CONFIG_SYS_FLASH_ERASE_TOUT) { - printf("Timeout\n"); - - if (intel) { - /* suspend erase */ - *addr = (FPW) 0x00B000B0; - } - - flash_reset(info); /* reset to read mode */ - rcode = 1; /* failed */ - break; - } - - /* show that we're waiting */ - if ((now - last) > 1000) { /* every second */ - putc('.'); - last = now; - } - } - - flash_reset(info); /* reset to read mode */ - } - - printf(" done\n"); - return rcode; -} - -/*----------------------------------------------------------------------- - * Copy memory to flash, returns: - * 0 - OK - * 1 - write timeout - * 2 - Flash not erased - */ -int -bad_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++; - } - - /* write one word to the flash */ - switch (info->flash_id & FLASH_VENDMASK) { - case FLASH_MAN_AMD: - res = write_word_amd(info, (FPWV *) addr, data); - break; - case FLASH_MAN_INTEL: - res = write_word_intel(info, (FPWV *) addr, data); - break; - default: - /* unknown flash type, error! */ - printf("missing or unknown FLASH type\n"); - res = 1; /* not really a timeout, but gives error */ - break; - } - } - - return (res); -} - -/** - * write_buf: - Copy memory to flash. - * - * @param info: - * @param src: source of copy transaction - * @param addr: where to copy to - * @param cnt: number of bytes to copy - * - * @return error code - */ - -int -write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt) -{ - ulong cp, wp; - FPW data; - int l; - int i, rc; - - wp = (addr & ~1); /* 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 << 8); - } - for (; i < 2 && cnt > 0; ++i) { - data = (data >> 8) | (*src++ << 8); - --cnt; - ++cp; - } - for (; cnt == 0 && i < 2; ++i, ++cp) { - data = (data >> 8) | (*(uchar *) cp << 8); - } - - if ((rc = write_word(info, (FPWV *)wp, data)) != 0) { - return (rc); - } - wp += 2; - } - - /* handle word aligned part */ - while (cnt >= 2) { - /* data = *((vushort*)src); */ - data = *((FPW *) src); - if ((rc = write_word(info, (FPWV *)wp, data)) != 0) { - return (rc); - } - src += sizeof (FPW); - wp += sizeof (FPW); - cnt -= sizeof (FPW); - } - - if (cnt == 0) - return ERR_OK; - - /* - * handle unaligned tail bytes - */ - data = 0; - for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) { - data = (data >> 8) | (*src++ << 8); - --cnt; - } - for (; i < 2; ++i, ++cp) { - data = (data >> 8) | (*(uchar *) cp << 8); - } - - return write_word(info, (FPWV *)wp, data); -} - -/*----------------------------------------------------------------------- - * Write a word to Flash for AMD FLASH - * A word is 16 or 32 bits, whichever the bus width of the flash bank - * (not an individual chip) is. - * - * returns: - * 0 - OK - * 1 - write timeout - * 2 - Flash not erased - */ -static int -write_word_amd(flash_info_t * info, FPWV * dest, FPW data) -{ - ulong start; - int flag; - int res = 0; /* result, assume success */ - FPWV *base; /* first address in flash bank */ - - /* Check if Flash is (sufficiently) erased */ - if ((*dest & data) != data) { - return (2); - } - - base = (FPWV *) (info->start[0]); - /* Disable interrupts which might cause a timeout here */ - flag = disable_interrupts(); - - base[0x0555] = (FPW) 0x00AA00AA; /* unlock */ - base[0x02AA] = (FPW) 0x00550055; /* unlock */ - base[0x0555] = (FPW) 0x00A000A0; /* selects program mode */ - - *dest = data; /* start programming the data */ - - /* re-enable interrupts if necessary */ - if (flag) - enable_interrupts(); - - start = get_timer(0); - - /* data polling for D7 */ - while (res == 0 - && (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) { - if (get_timer(0) - start > CONFIG_SYS_FLASH_WRITE_TOUT) { - *dest = (FPW) 0x00F000F0; /* reset bank */ - printf("SHA timeout\n"); - res = 1; - } - } - - return (res); -} - -/*----------------------------------------------------------------------- - * Write a word to Flash for Intel FLASH - * A word is 16 or 32 bits, whichever the bus width of the flash bank - * (not an individual chip) is. - * - * returns: - * 0 - OK - * 1 - write timeout - * 2 - Flash not erased - */ -static int -write_word_intel(flash_info_t * info, FPWV * dest, FPW data) -{ - ulong start; - int flag; - int res = 0; /* result, assume success */ - - /* Check if Flash is (sufficiently) erased */ - if ((*dest & data) != data) { - return (2); - } - - /* Disable interrupts which might cause a timeout here */ - flag = disable_interrupts(); - - *dest = (FPW) 0x00500050; /* clear status register */ - *dest = (FPW) 0x00FF00FF; /* make sure in read mode */ - *dest = (FPW) 0x00400040; /* program setup */ - - *dest = data; /* start programming the data */ - - /* re-enable interrupts if necessary */ - if (flag) - enable_interrupts(); - - start = get_timer(0); - - while (res == 0 && (*dest & (FPW) 0x00800080) != (FPW) 0x00800080) { - if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { - *dest = (FPW) 0x00B000B0; /* Suspend program */ - res = 1; - } - } - - if (res == 0 && (*dest & (FPW) 0x00100010)) - res = 1; /* write failed, time out error is close enough */ - - *dest = (FPW) 0x00500050; /* clear status register */ - *dest = (FPW) 0x00FF00FF; /* make sure in read mode */ - - return (res); -} - -#ifdef CONFIG_SYS_FLASH_PROTECTION -/*----------------------------------------------------------------------- - */ -int -flash_real_protect(flash_info_t * info, long sector, int prot) -{ - int rcode = 0; /* assume success */ - FPWV *addr; /* address of sector */ - FPW value; - - addr = (FPWV *) (info->start[sector]); - - switch (info->flash_id & FLASH_TYPEMASK) { - case FLASH_28F800C3B: - case FLASH_28F800C3T: - case FLASH_28F160C3B: - case FLASH_28F160C3T: - case FLASH_28F320C3B: - case FLASH_28F320C3T: - case FLASH_28F640C3B: - case FLASH_28F640C3T: - flash_reset(info); /* make sure in read mode */ - *addr = (FPW) 0x00600060L; /* lock command setup */ - if (prot) - *addr = (FPW) 0x00010001L; /* lock sector */ - else - *addr = (FPW) 0x00D000D0L; /* unlock sector */ - flash_reset(info); /* reset to read mode */ - - /* now see if it really is locked/unlocked as requested */ - *addr = (FPW) 0x00900090; - /* read sector protection at sector address, (A7 .. A0) = 0x02. - * D0 = 1 for each device if protected. - * If at least one device is protected the sector is marked - * protected, but return failure. Mixed protected and - * unprotected devices within a sector should never happen. - */ - value = addr[2] & (FPW) 0x00010001; - if (value == 0) - info->protect[sector] = 0; - else if (value == (FPW) 0x00010001) - info->protect[sector] = 1; - else { - /* error, mixed protected and unprotected */ - rcode = 1; - info->protect[sector] = 1; - } - if (info->protect[sector] != prot) - rcode = 1; /* failed to protect/unprotect as requested */ - - /* reload all protection bits from hardware for now */ - flash_sync_real_protect(info); - break; - - case FLASH_AM640U: - default: - /* no hardware protect that we support */ - info->protect[sector] = prot; - break; - } - - return rcode; -} -#endif |
