Merge with /home/hs/U-Boot/u-boot-dev

1 files changed, 413 insertions, 0 deletions

diff --git a/board/BuS/EB+MCF-EV123/flash.c b/board/BuS/EB+MCF-EV123/flash.c
new file mode 100644
index 0000000000..a5d621c44a
--- /dev/null
+++ b/board/BuS/EB+MCF-EV123/flash.c
@@ -0,0 +1,413 @@
+/*
+ * (C) Copyright 2005 
+ * BuS Elektronik GmbH & Co.KG <esw@bus-elektonik.de>
+ * 
+ * Based On
+ * 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  "cfm_flash.h"
+
+#define PHYS_FLASH_1 CFG_FLASH_BASE
+#define FLASH_BANK_SIZE 0x200000
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case (AMD_MANUFACT & FLASH_VENDMASK):
+		printf ("AMD: ");
+		switch (info->flash_id & FLASH_TYPEMASK) {
+		case (AMD_ID_LV160B & FLASH_TYPEMASK):
+			printf ("AM29LV160B (16Bit)\n");
+			break;
+		default:
+			printf ("Unknown Chip Type\n");
+			break;
+		}
+		break;
+	case FREESCALE_MANUFACT & FLASH_VENDMASK:
+		cfm_flash_print_info (info);
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	puts ("  Size: ");
+	if ((info->size >> 20) > 0)
+	{
+		printf ("%ld MiB",info->size >> 20);
+	}
+	else
+	{
+		printf ("%ld KiB",info->size >> 10);
+	}
+	printf (" in %d Sectors\n", info->sector_count);
+
+	printf ("  Sector Start Addresses:");
+	for (i = 0; i < info->sector_count; i++) {
+		if ((i % 4) == 0) {
+			printf ("\n    ");
+		}
+		printf ("%02d: %08lX%s  ", i,info->start[i],
+			info->protect[i] ? " P" : "  ");
+	}
+	printf ("\n\n");
+}
+
+unsigned long flash_init (void)
+{
+	int i, j;
+	ulong size = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		ulong flashbase = 0;
+
+		switch (i)
+		{
+		case 1:
+			flash_info[i].flash_id =
+				(AMD_MANUFACT & FLASH_VENDMASK) |
+				(AMD_ID_LV160B & 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);
+			flashbase = PHYS_FLASH_1;
+			for (j = 0; j < flash_info[i].sector_count; j++) {
+				if (j == 0) {
+					/* 1st is 16 KiB */
+					flash_info[i].start[j] = flashbase;
+				}
+				if ((j >= 1) && (j <= 2)) {
+				/* 2nd and 3rd are 8 KiB */
+					flash_info[i].start[j] =
+						flashbase + 0x4000 + 0x2000 * (j - 1);
+				}
+				if (j == 3) {
+					/* 4th is 32 KiB */
+					flash_info[i].start[j] = flashbase + 0x8000;
+				}
+				if ((j >= 4) && (j <= 34)) {
+					/* rest is 256 KiB */
+					flash_info[i].start[j] =
+						flashbase + 0x10000 + 0x10000 * (j - 4);
+				}
+			}
+			break;
+		case 0:
+			cfm_flash_init (&flash_info[i]);
+			break;
+		default:
+			panic ("configured to many flash banks!\n");
+		}
+
+		size += flash_info[i].size;
+	}
+
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_FLASH_BASE,
+		       CFG_FLASH_BASE + 0xffff, &flash_info[0]);
+
+	return size;
+}
+
+#define CMD_READ_ARRAY		0x00F0
+#define CMD_UNLOCK1		0x00AA
+#define CMD_UNLOCK2		0x0055
+#define CMD_ERASE_SETUP		0x0080
+#define CMD_ERASE_CONFIRM	0x0030
+#define CMD_PROGRAM		0x00A0
+#define CMD_UNLOCK_BYPASS	0x0020
+
+#define MEM_FLASH_ADDR1		(*(volatile u16 *)(info->start[0] + (0x00000555<<1)))
+#define MEM_FLASH_ADDR2		(*(volatile u16 *)(info->start[0] + (0x000002AA<<1)))
+
+
+#define BIT_ERASE_DONE		0x0080
+#define BIT_RDY_MASK		0x0080
+#define BIT_PROGRAM_ERROR	0x0020
+#define BIT_TIMEOUT		0x80000000	/* our flag */
+
+#define ERR_READY -1
+
+int amd_flash_erase_sector(flash_info_t * info, int sector)
+{
+	int state;
+	ulong result;
+
+	volatile u16 *addr =
+				(volatile u16 *) (info->start[sector]);
+
+	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 */
+	state = 0;
+	set_timer (0);
+
+	do {
+		result = *addr;
+
+		/* check timeout */
+		if (get_timer (0) > CFG_FLASH_ERASE_TOUT) {
+			MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+			state = ERR_TIMOUT;
+		}
+
+		if (!state && (result & 0xFFFF) & BIT_ERASE_DONE)
+			state = ERR_READY;
+	}
+	while (!state);
+	if (state == ERR_READY)
+		state = ERR_OK;
+
+	MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+
+	return state;
+}
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int iflag, cflag;
+	int sector;
+	int rc;
+
+	rc = ERR_OK;
+
+	if (info->flash_id == FLASH_UNKNOWN)
+	{
+		rc = ERR_UNKNOWN_FLASH_TYPE;
+	} /* (info->flash_id == FLASH_UNKNOWN) */
+
+	if ((s_first < 0) || (s_first > s_last) || s_last >= info->sector_count)
+	{
+		rc = ERR_INVAL;
+	}
+
+	cflag = icache_status ();
+	icache_disable ();
+	iflag = disable_interrupts ();
+
+	for (sector = s_first; (sector <= s_last) && (rc == ERR_OK); sector++) {
+
+		if (info->protect[sector])
+		{
+			putc('P'); /*  protected sector will not erase */
+		}
+		else
+		{
+			/* erase on unprotected sector */
+			puts("E\b");
+			switch (info->flash_id & FLASH_VENDMASK)
+			{
+			case (AMD_MANUFACT & FLASH_VENDMASK):
+				rc = amd_flash_erase_sector(info,sector);
+				break;
+			case (FREESCALE_MANUFACT & FLASH_VENDMASK):
+				rc = cfm_flash_erase_sector(info,sector);
+				break;
+			default:
+				return ERR_UNKNOWN_FLASH_VENDOR;
+			}
+			putc('.');
+		}
+	}
+	if (rc!=ERR_OK)
+	{
+		printf ("\n   ");
+		flash_perror (rc);
+	}
+	else
+	{
+		printf (" done\n");
+	}
+
+	udelay (10000);	/* allow flash to settle - wait 10 ms */
+
+	if (iflag)
+		enable_interrupts ();
+
+	if (cflag)
+  		icache_enable ();
+
+	return rc;
+}
+
+volatile static int amd_write_word (flash_info_t * info, ulong dest, u16 data)
+{
+	volatile u16 *addr;
+	ulong result;
+	int cflag, iflag;
+	int state;
+
+	/*
+	 * Check if Flash is (sufficiently) erased
+	 */
+	addr = (volatile u16 *) dest;
+
+	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.
+	 */
+
+	cflag = icache_status ();
+	icache_disable ();
+	iflag = disable_interrupts ();
+
+	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+	MEM_FLASH_ADDR1 = CMD_PROGRAM;
+	*addr = data;
+
+	/* arm simple, non interrupt dependent timer */
+	set_timer (0);
+
+	/* wait until flash is ready */
+	state = 0;
+	do {
+		result = *addr;
+
+		/* check timeout */
+		if (get_timer (0) > CFG_FLASH_ERASE_TOUT) {
+				state = ERR_TIMOUT;
+		}
+		if (!state && ((result & BIT_RDY_MASK) == (data & BIT_RDY_MASK)))
+			state = ERR_READY;
+
+	} while (!state);
+
+	*addr = CMD_READ_ARRAY;
+
+	if (state == ERR_READY)
+		state = ERR_OK;
+	if ((*addr != data) && (state != ERR_TIMOUT))
+		state = ERR_PROG_ERROR;
+
+	if (iflag)
+		enable_interrupts ();
+
+	if (cflag)
+		icache_enable ();
+
+	return state;
+}
+
+int amd_flash_write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	int rc;
+	ulong dest;
+	u16 data;
+
+	rc = ERR_OK;
+	if (addr & 1)
+	{
+		debug ("Byte alignment not supported\n");
+		rc = ERR_ALIGN;
+	}
+	if (cnt & 1)
+	{
+		debug ("Byte transfer not supported\n");
+		rc = ERR_ALIGN;
+	}
+
+	dest = addr;
+	while ((cnt>=2) && (rc == ERR_OK))
+	{
+		data =*((volatile u16 *) src);
+		rc=amd_write_word (info,dest,data);
+		src +=2;
+		dest +=2;
+		cnt -=2;
+	}
+	return rc;
+}
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	int rc;
+
+	switch (info->flash_id & FLASH_VENDMASK)
+	{
+		case (AMD_MANUFACT & FLASH_VENDMASK):
+			rc = amd_flash_write_buff(info,src,addr,cnt);
+			break;
+		case (FREESCALE_MANUFACT & FLASH_VENDMASK):
+			rc = cfm_flash_write_buff(info,src,addr,cnt);
+			break;
+		default:
+			rc = ERR_UNKNOWN_FLASH_VENDOR;
+	}
+	return rc;
+
+}
+int amd_flash_protect(flash_info_t * info,long sector,int prot)
+{
+	int rc;
+	rc= ERR_OK;
+	if (prot)
+	{
+		info->protect[sector]=1;
+	}
+	else
+	{
+		info->protect[sector]=0;
+	}
+	return rc;
+}
+
+#ifdef CFG_FLASH_PROTECTION
+
+int flash_real_protect(flash_info_t * info,long sector,int prot)
+{
+	int rc;
+
+	switch (info->flash_id & FLASH_VENDMASK)
+	{
+		case (AMD_MANUFACT & FLASH_VENDMASK):
+			rc = amd_flash_protect(info,sector,prot);
+			break;
+		case (FREESCALE_MANUFACT & FLASH_VENDMASK):
+			rc = cfm_flash_protect(info,sector,prot);
+			break;
+		default:
+			rc = ERR_UNKNOWN_FLASH_VENDOR;
+	}
+	return rc;
+}
+
+#endif