Initial revision

1 files changed, 455 insertions, 0 deletions

diff --git a/board/trab/flash.c b/board/trab/flash.c
new file mode 100644
index 0000000..2443777
--- /dev/null
+++ b/board/trab/flash.c
@@ -0,0 +1,455 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@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
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <environment.h>
+
+ulong myflush (void);
+
+
+#define FLASH_BANK_SIZE	0x800000	/* 8 MB */
+/* this varies depending on the sector */
+#define MAIN_SECT_SIZE  0x20000		/* 2 x 64 kB */
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+
+#define CMD_READ_ARRAY		0x00F000F0
+#define CMD_UNLOCK1		0x00AA00AA
+#define CMD_UNLOCK2		0x00550055
+#define CMD_ERASE_SETUP		0x00800080
+#define CMD_ERASE_CONFIRM	0x00300030
+#define CMD_PROGRAM		0x00A000A0
+#define CMD_UNLOCK_BYPASS	0x00200020
+
+#define MEM_FLASH_ADDR1		(*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
+#define MEM_FLASH_ADDR2		(*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
+
+#define BIT_ERASE_DONE		0x00800080
+#define BIT_RDY_MASK		0x00800080
+#define BIT_PROGRAM_ERROR	0x00200020
+#define BIT_TIMEOUT		0x80000000	/* our flag */
+
+#define READY 1
+#define ERR   2
+#define TMO   4
+
+/*-----------------------------------------------------------------------
+ */
+
+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 =
+			(AMD_MANUFACT  & FLASH_VENDMASK) |
+			(AMD_ID_LV320B & 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 too many flash banks!\n");
+		for (j = 0; j < flash_info[i].sector_count; j++) {
+
+			flash_info[i].start[j] = flashbase;
+
+			/* the first 8 sectors are 8 kB */
+			flashbase += (j < 8) ? 0x4000 : 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]);
+
+#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;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case (AMD_MANUFACT & FLASH_VENDMASK):
+		printf ("AMD: ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case (AMD_ID_LV320B & FLASH_TYPEMASK):
+		printf ("2x Am29LV320DB (32Mbit)\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)
+{
+	ulong result;
+
+#if 0
+	int cflag;
+#endif
+	int iflag, prot, sect;
+	int rc = ERR_OK;
+	int chip1, chip2;
+
+	debug ("flash_erase: s_first %d  s_last %d\n", s_first, s_last);
+
+	/* first look for protection bits */
+
+	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) !=
+		(AMD_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) {
+		printf ("- Warning: %d protected sectors will not be erased!\n",
+			prot);
+	} else {
+		printf ("\n");
+	}
+
+	/*
+	 * 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.
+	 */
+#if 0
+	cflag = icache_status ();
+	icache_disable ();
+#endif
+	iflag = disable_interrupts ();
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
+
+		debug ("Erasing sector %2d @ %08lX... ",
+			sect, info->start[sect]);
+
+		/* arm simple, non interrupt dependent timer */
+		reset_timer_masked ();
+
+		if (info->protect[sect] == 0) {	/* not protected */
+			vu_long *addr = (vu_long *) (info->start[sect]);
+
+			MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+			MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+			MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
+
+			MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+			MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+			*addr = CMD_ERASE_CONFIRM;
+
+			/* wait until flash is ready */
+			chip1 = chip2 = 0;
+
+			do {
+				result = *addr;
+
+				/* check timeout */
+				if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+					MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+					chip1 = TMO;
+					break;
+				}
+
+				if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
+					chip1 = READY;
+
+				if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
+					chip1 = ERR;
+
+				if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
+					chip2 = READY;
+
+				if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
+					chip2 = ERR;
+
+			} while (!chip1 || !chip2);
+
+			MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+
+			if (chip1 == ERR || chip2 == ERR) {
+				rc = ERR_PROG_ERROR;
+				goto outahere;
+			}
+			if (chip1 == TMO) {
+				rc = ERR_TIMOUT;
+				goto outahere;
+			}
+
+#if 0
+			printf ("ok.\n");
+		} else {		/* it was protected */
+
+			printf ("protected!\n");
+#endif
+		}
+	}
+
+outahere:
+	/* allow flash to settle - wait 10 ms */
+	udelay_masked (10000);
+
+	if (iflag)
+		enable_interrupts ();
+
+#if 0
+	if (cflag)
+		icache_enable ();
+#endif
+	return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+volatile static int write_word (flash_info_t * info, ulong dest,
+								ulong data)
+{
+	vu_long *addr = (vu_long *) dest;
+	ulong result;
+	int rc = ERR_OK;
+
+#if 0
+	int cflag;
+#endif
+	int iflag;
+	int chip1, chip2;
+
+	/*
+	 * Check if Flash is (sufficiently) erased
+	 */
+	result = *addr;
+	if ((result & 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.
+	 */
+#if 0
+	cflag = icache_status ();
+	icache_disable ();
+#endif
+	iflag = disable_interrupts ();
+
+	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+	MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
+	*addr = CMD_PROGRAM;
+	*addr = data;
+
+	/* arm simple, non interrupt dependent timer */
+	reset_timer_masked ();
+
+	/* wait until flash is ready */
+	chip1 = chip2 = 0;
+	do {
+		result = *addr;
+
+		/* check timeout */
+		if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+			chip1 = ERR | TMO;
+			break;
+		}
+		if (!chip1 && ((result & 0x80) == (data & 0x80)))
+			chip1 = READY;
+
+		if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
+			result = *addr;
+
+			if ((result & 0x80) == (data & 0x80))
+				chip1 = READY;
+			else
+				chip1 = ERR;
+		}
+
+		if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
+			chip2 = READY;
+
+		if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
+			result = *addr;
+
+			if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
+				chip2 = READY;
+			else
+				chip2 = ERR;
+		}
+
+	} while (!chip1 || !chip2);
+
+	*addr = CMD_READ_ARRAY;
+
+	if (chip1 == ERR || chip2 == ERR || *addr != data)
+		rc = ERR_PROG_ERROR;
+
+	if (iflag)
+		enable_interrupts ();
+
+#if 0
+	if (cflag)
+		icache_enable ();
+#endif
+
+	return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int l;
+	int i, rc;
+
+	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 << 24);
+		}
+		for (; i < 4 && cnt > 0; ++i) {
+			data = (data >> 8) | (*src++ << 24);
+			--cnt;
+			++cp;
+		}
+		for (; cnt == 0 && i < 4; ++i, ++cp) {
+			data = (data >> 8) | (*(uchar *) cp << 24);
+		}
+
+		if ((rc = write_word (info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 4;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 4) {
+		data = *((vu_long *) src);
+		if ((rc = write_word (info, wp, data)) != 0) {
+			return (rc);
+		}
+		src += 4;
+		wp += 4;
+		cnt -= 4;
+	}
+
+	if (cnt == 0) {
+		return ERR_OK;
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
+		data = (data >> 8) | (*src++ << 24);
+		--cnt;
+	}
+	for (; i < 4; ++i, ++cp) {
+		data = (data >> 8) | (*(uchar *) cp << 24);
+	}
+
+	return write_word (info, wp, data);
+}