Initial revision

1 files changed, 341 insertions, 0 deletions

diff --git a/board/ep7312/flash.c b/board/ep7312/flash.c
new file mode 100644
index 0000000..373d238
--- /dev/null
+++ b/board/ep7312/flash.c
@@ -0,0 +1,341 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.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>
+
+#define FLASH_BANK_SIZE 0x1000000
+#define MAIN_SECT_SIZE  0x20000
+
+flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
+
+
+/*-----------------------------------------------------------------------
+ */
+
+ulong flash_init (void)
+{
+	int i, j;
+	ulong size = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		ulong flashbase = 0;
+
+		flash_info[i].flash_id =
+				(INTEL_MANUFACT & FLASH_VENDMASK) |
+				(INTEL_ID_28F128J3 & FLASH_TYPEMASK);
+		flash_info[i].size = FLASH_BANK_SIZE;
+		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+		memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+		if (i == 0)
+			flashbase = PHYS_FLASH_1;
+		else
+			panic ("configured to many flash banks!\n");
+		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,
+			CFG_FLASH_BASE,
+			CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
+			&flash_info[0]);
+
+	flash_protect ( FLAG_PROTECT_SET,
+			CFG_ENV_ADDR,
+			CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+
+	return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case (INTEL_MANUFACT & FLASH_VENDMASK):
+		printf ("Intel: ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
+		printf ("28F128J3 (128Mbit)\n");
+		break;
+	default:
+		printf ("Unknown Chip Type\n");
+		goto Done;
+		break;
+	}
+
+	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");
+
+  Done:
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int flag, prot, sect;
+	int rc = ERR_OK;
+
+	if (info->flash_id == FLASH_UNKNOWN)
+		return ERR_UNKNOWN_FLASH_TYPE;
+
+	if ((s_first < 0) || (s_first > s_last)) {
+		return ERR_INVAL;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) !=
+		(INTEL_MANUFACT & FLASH_VENDMASK)) {
+		return ERR_UNKNOWN_FLASH_VENDOR;
+	}
+
+	prot = 0;
+	for (sect = s_first; sect <= s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+	if (prot)
+		return ERR_PROTECTED;
+
+	/*
+	 * Disable interrupts which might cause a timeout
+	 * here. Remember that our exception vectors are
+	 * at address 0 in the flash, and we don't want a
+	 * (ticker) exception to happen while the flash
+	 * chip is in programming mode.
+	 */
+	flag = disable_interrupts ();
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
+
+		printf ("Erasing sector %2d ... ", sect);
+
+		/* arm simple, non interrupt dependent timer */
+		reset_timer_masked ();
+
+		if (info->protect[sect] == 0) {	/* not protected */
+			vu_short *addr = (vu_short *) (info->start[sect]);
+
+			*addr = 0x20;		/* erase setup */
+			*addr = 0xD0;		/* erase confirm */
+
+			while ((*addr & 0x80) != 0x80) {
+				if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+					*addr = 0xB0;	/* suspend erase */
+					*addr = 0xFF;	/* reset to read mode */
+					rc = ERR_TIMOUT;
+					goto outahere;
+				}
+			}
+
+			/* clear status register command */
+			*addr = 0x50;
+			/* reset to read mode */
+			*addr = 0xFF;
+		}
+		printf ("ok.\n");
+	}
+	if (ctrlc ())
+		printf ("User Interrupt!\n");
+
+  outahere:
+
+	/* allow flash to settle - wait 10 ms */
+	udelay_masked (10000);
+
+	if (flag)
+		enable_interrupts ();
+
+	return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+static int write_word (flash_info_t * info, ulong dest, ushort data)
+{
+	vu_short *addr = (vu_short *) dest, val;
+	int rc = ERR_OK;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased
+	 */
+	if ((*addr & data) != data)
+		return ERR_NOT_ERASED;
+
+	/*
+	 * Disable interrupts which might cause a timeout
+	 * here. Remember that our exception vectors are
+	 * at address 0 in the flash, and we don't want a
+	 * (ticker) exception to happen while the flash
+	 * chip is in programming mode.
+	 */
+	flag = disable_interrupts ();
+
+	/* clear status register command */
+	*addr = 0x50;
+
+	/* program set-up command */
+	*addr = 0x40;
+
+	/* latch address/data */
+	*addr = data;
+
+	/* arm simple, non interrupt dependent timer */
+	reset_timer_masked ();
+
+	/* wait while polling the status register */
+	while (((val = *addr) & 0x80) != 0x80) {
+		if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
+			rc = ERR_TIMOUT;
+			/* suspend program command */
+			*addr = 0xB0;
+			goto outahere;
+		}
+	}
+
+	if (val & 0x1A) {			/* check for error */
+		printf ("\nFlash write error %02x at address %08lx\n",
+				(int) val, (unsigned long) dest);
+		if (val & (1 << 3)) {
+			printf ("Voltage range error.\n");
+			rc = ERR_PROG_ERROR;
+			goto outahere;
+		}
+		if (val & (1 << 1)) {
+			printf ("Device protect error.\n");
+			rc = ERR_PROTECTED;
+			goto outahere;
+		}
+		if (val & (1 << 4)) {
+			printf ("Programming error.\n");
+			rc = ERR_PROG_ERROR;
+			goto outahere;
+		}
+		rc = ERR_PROG_ERROR;
+		goto outahere;
+	}
+
+  outahere:
+	/* read array command */
+	*addr = 0xFF;
+
+	if (flag)
+		enable_interrupts ();
+
+	return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong cp, wp;
+	ushort 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, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 2;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 2) {
+		data = *((vu_short *) src);
+		if ((rc = write_word (info, wp, data)) != 0) {
+			return (rc);
+		}
+		src += 2;
+		wp += 2;
+		cnt -= 2;
+	}
+
+	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, wp, data);
+}