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-rw-r--r--board/w7o/flash.c941
1 files changed, 941 insertions, 0 deletions
diff --git a/board/w7o/flash.c b/board/w7o/flash.c
new file mode 100644
index 000000000..004847623
--- /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() */
+
+/*-----------------------------------------------------------------------
+ */
+
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 22:51:39 +0000