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-rw-r--r--board/pleb2/flash.c814
1 files changed, 814 insertions, 0 deletions
diff --git a/board/pleb2/flash.c b/board/pleb2/flash.c
new file mode 100644
index 000000000..97271d921
--- /dev/null
+++ b/board/pleb2/flash.c
@@ -0,0 +1,814 @@
+/*
+ * (C) Copyright 2000
+ * 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 <mpc8xx.h>
+/* environment.h defines the various CFG_ENV_... values in terms
+ * of whichever ones are given in the configuration file.
+ */
+#include <environment.h>
+
+flash_info_t flash_info[CFG_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
+ */
+static ulong flash_get_size (FPWV * addr, flash_info_t * info);
+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);
+static void flash_get_offsets (ulong base, flash_info_t * info);
+
+#ifdef CFG_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)
+ */
+unsigned long flash_init (void)
+{
+ unsigned long size_b;
+ int i;
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ size_b = flash_get_size ((FPW *) CFG_FLASH_BASE, &flash_info[0]);
+
+ flash_info[0].size = size_b;
+
+ if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx\n",
+ size_b);
+ }
+
+ /* Do this again (was done already in flast_get_size), just
+ * in case we move it when remap the FLASH.
+ */
+ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+#ifdef CFG_FLASH_PROTECTION
+ /* read the hardware protection status (if any) into the
+ * protection array in flash_info.
+ */
+ flash_sync_real_protect (&flash_info[0]);
+#endif
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_MONITOR_BASE,
+ CFG_MONITOR_BASE + monitor_flash_len - 1,
+ &flash_info[0]);
+#endif
+
+#ifdef CFG_ENV_ADDR
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_ENV_ADDR,
+ CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+#endif
+
+#ifdef CFG_ENV_ADDR_REDUND
+ flash_protect (FLAG_PROTECT_SET,
+ CFG_ENV_ADDR_REDUND,
+ CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
+ &flash_info[0]);
+#endif
+
+ return (size_b);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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 */
+}
+
+/*-----------------------------------------------------------------------
+ */
+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);
+ } else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD
+ && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM800T) {
+
+ int sect_size; /* number of bytes/sector */
+
+ sect_size = 0x00010000 * (sizeof (FPW) / 2);
+
+ /* set up sector start address table (top boot sector type) */
+ for (i = 0; i < info->sector_count - 3; i++)
+ info->start[i] = base + (i * sect_size);
+ i = info->sector_count - 1;
+ info->start[i--] =
+ base + (info->size - 0x00004000) * (sizeof (FPW) / 2);
+ info->start[i--] =
+ base + (info->size - 0x00006000) * (sizeof (FPW) / 2);
+ info->start[i--] =
+ base + (info->size - 0x00008000) * (sizeof (FPW) / 2);
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+void flash_print_info (flash_info_t * info)
+{
+ int i;
+ uchar *boottype;
+ uchar *bootletter;
+ uchar *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_AM800T:
+ fmt = "29LV800B%s (8 Mbit, %s)\n";
+ break;
+ 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!
+ */
+
+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_LV800T:
+ info->flash_id += FLASH_AM800T;
+ info->sector_count = 19;
+ info->size = 0x00100000 * (sizeof (FPW) / 2);
+ break; /* => 1 or 2 MiB */
+
+ 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);
+}
+
+#ifdef CFG_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:
+ case FLASH_AM800T:
+ 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 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:
+ case FLASH_AM800T:
+ 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");
+ }
+
+ reset_timer_masked ();
+
+ /* 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 ();
+
+ reset_timer_masked ();
+ last = 0;
+
+ 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_masked ()) > CFG_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) > 1 * CFG_HZ) { /* 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 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
+ */
+#ifdef CFG_LITTLE_ENDIAN
+ for (i = 0; i < sizeof (data); i++) {
+ data >>= 8;
+ if (i < bytes || i - bytes >= left)
+ data += (*((uchar *) addr + i)) << 24;
+ else
+ data += (*src++) << 24;
+ }
+#else
+ for (i = 0; i < sizeof (data); i++) {
+ data <<= 8;
+ if (i < bytes || i - bytes >= left)
+ data += *((uchar *) addr + i);
+ else
+ data += *src++;
+ }
+#endif
+
+ /* 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 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)
+{
+ 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 ();
+
+ reset_timer_masked ();
+
+ /* data polling for D7 */
+ while (res == 0
+ && (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) {
+ if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
+ *dest = (FPW) 0x00F000F0; /* reset bank */
+ 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)
+{
+ 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 ();
+
+ reset_timer_masked ();
+
+ while (res == 0 && (*dest & (FPW) 0x00800080) != (FPW) 0x00800080) {
+ if (get_timer_masked () > CFG_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 CFG_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:
+ case FLASH_AM800T:
+ default:
+ /* no hardware protect that we support */
+ info->protect[sector] = prot;
+ break;
+ }
+
+ return rcode;
+}
+#endif
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