Merge branch 'master' of git://git.denx.de/u-boot-arm

1 files changed, 433 insertions, 0 deletions

diff --git a/board/samsung/smdk2410/flash.c b/board/samsung/smdk2410/flash.c
new file mode 100644
index 0000000..132d752
--- /dev/null
+++ b/board/samsung/smdk2410/flash.c
@@ -0,0 +1,433 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@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>
+
+ulong myflush (void);
+
+
+#define FLASH_BANK_SIZE	PHYS_FLASH_SIZE
+#define MAIN_SECT_SIZE  0x10000	/* 64 KB */
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+
+#define CMD_READ_ARRAY		0x000000F0
+#define CMD_UNLOCK1		0x000000AA
+#define CMD_UNLOCK2		0x00000055
+#define CMD_ERASE_SETUP		0x00000080
+#define CMD_ERASE_CONFIRM	0x00000030
+#define CMD_PROGRAM		0x000000A0
+#define CMD_UNLOCK_BYPASS	0x00000020
+
+#define MEM_FLASH_ADDR1		(*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 1)))
+#define MEM_FLASH_ADDR2		(*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 1)))
+
+#define BIT_ERASE_DONE		0x00000080
+#define BIT_RDY_MASK		0x00000080
+#define BIT_PROGRAM_ERROR	0x00000020
+#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 < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
+		ulong flashbase = 0;
+
+		flash_info[i].flash_id =
+#if defined(CONFIG_AMD_LV400)
+			(AMD_MANUFACT & FLASH_VENDMASK) |
+			(AMD_ID_LV400B & FLASH_TYPEMASK);
+#elif defined(CONFIG_AMD_LV800)
+			(AMD_MANUFACT & FLASH_VENDMASK) |
+			(AMD_ID_LV800B & FLASH_TYPEMASK);
+#else
+#error "Unknown flash configured"
+#endif
+			flash_info[i].size = FLASH_BANK_SIZE;
+		flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
+		memset (flash_info[i].protect, 0, CONFIG_SYS_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++) {
+			if (j <= 3) {
+				/* 1st one is 16 KB */
+				if (j == 0) {
+					flash_info[i].start[j] =
+						flashbase + 0;
+				}
+
+				/* 2nd and 3rd are both 8 KB */
+				if ((j == 1) || (j == 2)) {
+					flash_info[i].start[j] =
+						flashbase + 0x4000 + (j -
+								      1) *
+						0x2000;
+				}
+
+				/* 4th 32 KB */
+				if (j == 3) {
+					flash_info[i].start[j] =
+						flashbase + 0x8000;
+				}
+			} else {
+				flash_info[i].start[j] =
+					flashbase + (j - 3) * MAIN_SECT_SIZE;
+			}
+		}
+		size += flash_info[i].size;
+	}
+
+	flash_protect (FLAG_PROTECT_SET,
+		       CONFIG_SYS_FLASH_BASE,
+		       CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
+		       &flash_info[0]);
+
+	flash_protect (FLAG_PROTECT_SET,
+		       CONFIG_ENV_ADDR,
+		       CONFIG_ENV_ADDR + CONFIG_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 (AMD_MANUFACT & FLASH_VENDMASK):
+		printf ("AMD: ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case (AMD_ID_LV400B & FLASH_TYPEMASK):
+		printf ("1x Amd29LV400BB (4Mbit)\n");
+		break;
+	case (AMD_ID_LV800B & FLASH_TYPEMASK):
+		printf ("1x Amd29LV800BB (8Mbit)\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)
+{
+	ushort result;
+	int iflag, cflag, prot, sect;
+	int rc = ERR_OK;
+	int chip;
+
+	/* 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)
+		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.
+	 */
+	cflag = icache_status ();
+	icache_disable ();
+	iflag = 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]);
+
+			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 */
+			chip = 0;
+
+			do {
+				result = *addr;
+
+				/* check timeout */
+				if (get_timer_masked () >
+				    CONFIG_SYS_FLASH_ERASE_TOUT) {
+					MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+					chip = TMO;
+					break;
+				}
+
+				if (!chip
+				    && (result & 0xFFFF) & BIT_ERASE_DONE)
+					chip = READY;
+
+				if (!chip
+				    && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
+					chip = ERR;
+
+			} while (!chip);
+
+			MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+
+			if (chip == ERR) {
+				rc = ERR_PROG_ERROR;
+				goto outahere;
+			}
+			if (chip == TMO) {
+				rc = ERR_TIMOUT;
+				goto outahere;
+			}
+
+			printf ("ok.\n");
+		} else {	/* it was protected */
+
+			printf ("protected!\n");
+		}
+	}
+
+	if (ctrlc ())
+		printf ("User Interrupt!\n");
+
+      outahere:
+	/* allow flash to settle - wait 10 ms */
+	udelay_masked (10000);
+
+	if (iflag)
+		enable_interrupts ();
+
+	if (cflag)
+		icache_enable ();
+
+	return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+static int write_hword (flash_info_t * info, ulong dest, ushort data)
+{
+	vu_short *addr = (vu_short *) dest;
+	ushort result;
+	int rc = ERR_OK;
+	int cflag, iflag;
+	int chip;
+
+	/*
+	 * 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.
+	 */
+	cflag = icache_status ();
+	icache_disable ();
+	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 */
+	chip = 0;
+	do {
+		result = *addr;
+
+		/* check timeout */
+		if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
+			chip = ERR | TMO;
+			break;
+		}
+		if (!chip && ((result & 0x80) == (data & 0x80)))
+			chip = READY;
+
+		if (!chip && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
+			result = *addr;
+
+			if ((result & 0x80) == (data & 0x80))
+				chip = READY;
+			else
+				chip = ERR;
+		}
+
+	} while (!chip);
+
+	*addr = CMD_READ_ARRAY;
+
+	if (chip == ERR || *addr != data)
+		rc = ERR_PROG_ERROR;
+
+	if (iflag)
+		enable_interrupts ();
+
+	if (cflag)
+		icache_enable ();
+
+	return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong cp, wp;
+	int l;
+	int i, rc;
+	ushort data;
+
+	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_hword (info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 2;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 2) {
+		data = *((vu_short *) src);
+		if ((rc = write_hword (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_hword (info, wp, data);
+}