+++ /dev/null
-/*
- * (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
projects / people / ms / u-boot.git / blobdiff