1 files changed, 403 insertions, 0 deletions
diff --git a/board/bf537-stamp/flash.c b/board/bf537-stamp/flash.c
new file mode 100644
index 000000000..ed8584147
--- /dev/null
+++ b/board/bf537-stamp/flash.c
@@ -0,0 +1,403 @@
+/*
+ * U-boot - flash.c Flash driver for PSD4256GV
+ *
+ * Copyright (c) 2005-2007 Analog Devices Inc.
+ * This file is based on BF533EzFlash.c originally written by Analog Devices, Inc.
+ *
+ * (C) Copyright 2000-2004
+ * 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., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <malloc.h>
+#include <config.h>
+#include <asm/io.h>
+#include "flash-defines.h"
+
+void flash_reset(void)
+{
+	reset_flash();
+}
+
+unsigned long flash_get_size(ulong baseaddr, flash_info_t * info, int bank_flag)
+{
+	int id = 0, i = 0;
+	static int FlagDev = 1;
+
+	id = get_codes();
+	if (FlagDev) {
+		FlagDev = 0;
+	}
+	info->flash_id = id;
+	switch (bank_flag) {
+	case 0:
+		for (i = PriFlashABegin; i < SecFlashABegin; i++)
+			info->start[i] = (baseaddr + (i * AFP_SectorSize1));
+		for (i = SecFlashABegin; i < NUM_SECTORS; i++)
+			info->start[i] =
+			    (baseaddr + SecFlashAOff +
+			     ((i - SecFlashABegin) * AFP_SectorSize2));
+		info->size = 0x400000;
+		info->sector_count = NUM_SECTORS;
+		break;
+	case 1:
+		info->start[0] = baseaddr + SecFlashASec1Off;
+		info->start[1] = baseaddr + SecFlashASec2Off;
+		info->start[2] = baseaddr + SecFlashASec3Off;
+		info->start[3] = baseaddr + SecFlashASec4Off;
+		info->size = 0x10000;
+		info->sector_count = 4;
+		break;
+	case 2:
+		info->start[0] = baseaddr + SecFlashBSec1Off;
+		info->start[1] = baseaddr + SecFlashBSec2Off;
+		info->start[2] = baseaddr + SecFlashBSec3Off;
+		info->start[3] = baseaddr + SecFlashBSec4Off;
+		info->size = 0x10000;
+		info->sector_count = 4;
+		break;
+	}
+	return (info->size);
+}
+
+unsigned long flash_init(void)
+{
+	unsigned long size_b;
+	int i;
+
+	size_b = 0;
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	size_b = flash_get_size(CFG_FLASH_BASE, &flash_info[0], 0);
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b == 0) {
+		printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+		       size_b, size_b >> 20);
+	}
+
+	/* flash_protect (int flag, ulong from, ulong to, flash_info_t *info) */
+	(void)flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE,
+			    (flash_info[0].start[2] - 1), &flash_info[0]);
+#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
+	(void)flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF,
+			    &flash_info[0]);
+#endif
+
+	return (size_b);
+}
+
+void flash_print_info(flash_info_t * info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		printf("missing or unknown FLASH type\n");
+		return;
+	}
+
+	switch (info->flash_id) {
+	case (STM_ID_29W320EB & 0xFFFF):
+	case (STM_ID_29W320DB & 0xFFFF):
+		printf("ST Microelectronics ");
+		break;
+	default:
+		printf("Unknown Vendor: (0x%08X) ", info->flash_id);
+		break;
+	}
+	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");
+	return;
+}
+
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+	int cnt = 0, i;
+	int prot, sect;
+
+	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");
+
+	cnt = s_last - s_first + 1;
+
+#if (BFIN_BOOT_MODE == BF537_BYPASS_BOOT)
+	printf("Erasing Flash locations, Please Wait\n");
+	for (i = s_first; i <= s_last; i++) {
+		if (info->protect[i] == 0) {	/* not protected */
+			if (erase_block_flash(i) < 0) {
+				printf("Error Sector erasing \n");
+				return FLASH_FAIL;
+			}
+		}
+	}
+#elif (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
+	if (cnt == FLASH_TOT_SECT) {
+		printf("Erasing flash, Please Wait \n");
+		if (erase_flash() < 0) {
+			printf("Erasing flash failed \n");
+			return FLASH_FAIL;
+		}
+	} else {
+		printf("Erasing Flash locations, Please Wait\n");
+		for (i = s_first; i <= s_last; i++) {
+			if (info->protect[i] == 0) {	/* not protected */
+				if (erase_block_flash(i) < 0) {
+					printf("Error Sector erasing \n");
+					return FLASH_FAIL;
+				}
+			}
+		}
+	}
+#endif
+	printf("\n");
+	return FLASH_SUCCESS;
+}
+
+int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	int d;
+	if (addr % 2) {
+		read_flash(addr - 1 - CFG_FLASH_BASE, &d);
+		d = (int)((d & 0x00FF) | (*src++ << 8));
+		write_data(addr - 1, 2, (uchar *) & d);
+		write_data(addr + 1, cnt - 1, src);
+	} else
+		write_data(addr, cnt, src);
+	return FLASH_SUCCESS;
+}
+
+int write_data(long lStart, long lCount, uchar * pnData)
+{
+	long i = 0;
+	unsigned long ulOffset = lStart - CFG_FLASH_BASE;
+	int d;
+	int nSector = 0;
+	int flag = 0;
+
+	if (lCount % 2) {
+		flag = 1;
+		lCount = lCount - 1;
+	}
+
+	for (i = 0; i < lCount - 1; i += 2, ulOffset += 2) {
+		get_sector_number(ulOffset, &nSector);
+		read_flash(ulOffset, &d);
+		if (d != 0xffff) {
+			printf
+			    ("Flash not erased at offset 0x%x Please erase to reprogram \n",
+			     ulOffset);
+			return FLASH_FAIL;
+		}
+		unlock_flash(ulOffset);
+		d = (int)(pnData[i] | pnData[i + 1] << 8);
+		write_flash(ulOffset, d);
+		if (poll_toggle_bit(ulOffset) < 0) {
+			printf("Error programming the flash \n");
+			return FLASH_FAIL;
+		}
+		if ((i > 0) && (!(i % AFP_SectorSize2)))
+			printf(".");
+	}
+	if (flag) {
+		get_sector_number(ulOffset, &nSector);
+		read_flash(ulOffset, &d);
+		if (d != 0xffff) {
+			printf
+			    ("Flash not erased at offset 0x%x Please erase to reprogram \n",
+			     ulOffset);
+			return FLASH_FAIL;
+		}
+		unlock_flash(ulOffset);
+		d = (int)(pnData[i] | (d & 0xFF00));
+		write_flash(ulOffset, d);
+		if (poll_toggle_bit(ulOffset) < 0) {
+			printf("Error programming the flash \n");
+			return FLASH_FAIL;
+		}
+	}
+	return FLASH_SUCCESS;
+}
+
+int write_flash(long nOffset, int nValue)
+{
+	long addr;
+
+	addr = (CFG_FLASH_BASE + nOffset);
+	*(unsigned volatile short *)addr = nValue;
+	sync();
+#if (BFIN_BOOT_MODE == BF537_SPI_MASTER_BOOT)
+	if (icache_status())
+		udelay(CONFIG_CCLK_HZ / 1000000);
+#endif
+	return FLASH_SUCCESS;
+}
+
+int read_flash(long nOffset, int *pnValue)
+{
+	unsigned short *pFlashAddr =
+	    (unsigned short *)(CFG_FLASH_BASE + nOffset);
+
+	*pnValue = *pFlashAddr;
+
+	return TRUE;
+}
+
+int poll_toggle_bit(long lOffset)
+{
+	unsigned int u1, u2;
+	volatile unsigned long *FB =
+	    (volatile unsigned long *)(CFG_FLASH_BASE + lOffset);
+	while (1) {
+		u1 = *(volatile unsigned short *)FB;
+		u2 = *(volatile unsigned short *)FB;
+		u1 ^= u2;
+		if (!(u1 & 0x0040))
+			break;
+		if (!(u2 & 0x0020))
+			continue;
+		else {
+			u1 = *(volatile unsigned short *)FB;
+			u2 = *(volatile unsigned short *)FB;
+			u1 ^= u2;
+			if (!(u1 & 0x0040))
+				break;
+			else {
+				reset_flash();
+				return FLASH_FAIL;
+			}
+		}
+	}
+	return FLASH_SUCCESS;
+}
+
+void reset_flash(void)
+{
+	write_flash(WRITESEQ1, RESET_VAL);
+	/* Wait for 10 micro seconds */
+	udelay(10);
+}
+
+int erase_flash(void)
+{
+	write_flash(WRITESEQ1, WRITEDATA1);
+	write_flash(WRITESEQ2, WRITEDATA2);
+	write_flash(WRITESEQ3, WRITEDATA3);
+	write_flash(WRITESEQ4, WRITEDATA4);
+	write_flash(WRITESEQ5, WRITEDATA5);
+	write_flash(WRITESEQ6, WRITEDATA6);
+
+	if (poll_toggle_bit(0x0000) < 0)
+		return FLASH_FAIL;
+
+	return FLASH_SUCCESS;
+}
+
+int erase_block_flash(int nBlock)
+{
+	long ulSectorOff = 0x0;
+
+	if ((nBlock < 0) || (nBlock > AFP_NumSectors))
+		return FALSE;
+
+	/* figure out the offset of the block in flash */
+	if ((nBlock >= 0) && (nBlock < SecFlashABegin))
+		ulSectorOff = nBlock * AFP_SectorSize1;
+
+	else if ((nBlock >= SecFlashABegin) && (nBlock < NUM_SECTORS))
+		ulSectorOff =
+		    SecFlashAOff + (nBlock - SecFlashABegin) * AFP_SectorSize2;
+	/* no such sector */
+	else
+		return FLASH_FAIL;
+
+	write_flash((WRITESEQ1 | ulSectorOff), WRITEDATA1);
+	write_flash((WRITESEQ2 | ulSectorOff), WRITEDATA2);
+	write_flash((WRITESEQ3 | ulSectorOff), WRITEDATA3);
+	write_flash((WRITESEQ4 | ulSectorOff), WRITEDATA4);
+	write_flash((WRITESEQ5 | ulSectorOff), WRITEDATA5);
+
+	write_flash(ulSectorOff, BlockEraseVal);
+
+	if (poll_toggle_bit(ulSectorOff) < 0)
+		return FLASH_FAIL;
+	printf(".");
+
+	return FLASH_SUCCESS;
+}
+
+void unlock_flash(long ulOffset)
+{
+	unsigned long ulOffsetAddr = ulOffset;
+	ulOffsetAddr &= 0xFFFF0000;
+
+	write_flash((WRITESEQ1 | ulOffsetAddr), UNLOCKDATA1);
+	write_flash((WRITESEQ2 | ulOffsetAddr), UNLOCKDATA2);
+	write_flash((WRITESEQ3 | ulOffsetAddr), UNLOCKDATA3);
+}
+
+int get_codes()
+{
+	int dev_id = 0;
+
+	write_flash(WRITESEQ1, GETCODEDATA1);
+	write_flash(WRITESEQ2, GETCODEDATA2);
+	write_flash(WRITESEQ3, GETCODEDATA3);
+
+	read_flash(0x0402, &dev_id);
+	dev_id &= 0x0000FFFF;
+
+	reset_flash();
+
+	return dev_id;
+}
+
+void get_sector_number(long ulOffset, int *pnSector)
+{
+	int nSector = 0;
+	long lMainEnd = 0x400000;
+	long lBootEnd = 0x10000;
+
+	/* sector numbers for the FLASH A boot sectors */
+	if (ulOffset < lBootEnd) {
+		nSector = (int)ulOffset / AFP_SectorSize1;
+	}
+	/* sector numbers for the FLASH B boot sectors */
+	else if ((ulOffset >= lBootEnd) && (ulOffset < lMainEnd)) {
+		nSector = ((ulOffset / (AFP_SectorSize2)) + 7);
+	}
+	/* if it is a valid sector, set it */
+	if ((nSector >= 0) && (nSector < AFP_NumSectors))
+		*pnSector = nSector;
+
+}