Add 82dnt board support

1 files changed, 588 insertions, 0 deletions

diff --git a/board/o2dnt/flash.c b/board/o2dnt/flash.c
new file mode 100644
index 0000000..186e0d2
--- /dev/null
+++ b/board/o2dnt/flash.c
@@ -0,0 +1,588 @@
+/*
+ * (C) Copyright 2005
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * flash_real_protect() routine based on boards/alaska/flash.c
+ * (C) Copyright 2001
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * 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>
+
+/* Intel-compatible flash commands */
+#define INTEL_ERASE	0x20
+#define INTEL_PROGRAM	0x40
+#define INTEL_CLEAR	0x50
+#define INTEL_LOCKBIT	0x60
+#define INTEL_PROTECT	0x01
+#define INTEL_STATUS	0x70
+#define INTEL_READID	0x90
+#define INTEL_READID	0x90
+#define INTEL_SUSPEND	0xB0
+#define INTEL_CONFIRM	0xD0
+#define INTEL_RESET	0xFF
+
+/* Intel-compatible flash status bits */
+#define INTEL_FINISHED	0x80
+#define INTEL_OK	0x80
+
+typedef unsigned char FLASH_PORT_WIDTH;
+typedef volatile unsigned char FLASH_PORT_WIDTHV;
+#define FPW		FLASH_PORT_WIDTH
+#define FPWV		FLASH_PORT_WIDTHV
+#define	FLASH_ID_MASK	0xFF
+
+#define ORMASK(size) ((-size) & OR_AM_MSK)
+
+#define FLASH_CYCLE1	0x0555
+#define FLASH_CYCLE2	0x02aa
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(FPWV *addr, flash_info_t *info);
+static void flash_reset(flash_info_t *info);
+static flash_info_t *flash_get_info(ulong base);
+static int write_data (flash_info_t *info, FPWV *dest, FPW data); /* O2D */
+static void flash_sync_real_protect (flash_info_t * info);
+static unsigned char intel_sector_protected (flash_info_t *info, ushort sector);
+
+/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
+ */
+unsigned long flash_init (void)
+{
+	unsigned long size = 0;
+	int i;
+	extern void flash_preinit(void);
+	extern void flash_afterinit(ulong);
+
+	flash_preinit();
+
+	/* Init: no FLASHes known */
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+		memset(&flash_info[i], 0, sizeof(flash_info_t));
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	/* Query flash chip */
+	flash_info[0].size =
+		flash_get_size((FPW *)CFG_FLASH_BASE, &flash_info[0]);
+	size += flash_info[0].size;
+
+	/* get the h/w and s/w protection status in sync */
+	flash_sync_real_protect(&flash_info[0]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+	/* monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+			CFG_MONITOR_BASE,
+			CFG_MONITOR_BASE+monitor_flash_len-1,
+			flash_get_info(CFG_MONITOR_BASE));
+#endif
+
+#ifdef	CFG_ENV_IS_IN_FLASH
+	/* ENV protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+			CFG_ENV_ADDR,
+			CFG_ENV_ADDR+CFG_ENV_SIZE-1,
+			flash_get_info(CFG_ENV_ADDR));
+#endif
+
+
+	flash_afterinit(size);
+	return (size ? size : 1);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_reset(flash_info_t *info)
+{
+	FPWV *base = (FPWV *)(info->start[0]);
+
+	/* Put FLASH back in read mode */
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL)
+		*base = (FPW) INTEL_RESET;	/* Intel Read Mode */
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+static flash_info_t *flash_get_info(ulong base)
+{
+	int i;
+	flash_info_t * info;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) {
+		info = & flash_info[i];
+		if (info->size &&
+				info->start[0] <= base &&
+				base <= info->start[0] + info->size - 1)
+			break;
+	}
+
+	return (i == CFG_MAX_FLASH_BANKS ? 0 : info);
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+void flash_print_info (flash_info_t *info)
+{
+	int i;
+	uchar *boottype;
+	uchar *bootletter;
+	uchar *fmt;
+	uchar botbootletter[] = "B";
+	uchar topbootletter[] = "T";
+	uchar botboottype[] = "bottom boot sector";
+	uchar topboottype[] = "top boot sector";
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		printf ("missing or unknown FLASH type\n");
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+		case FLASH_MAN_INTEL:
+			printf ("INTEL ");
+			break;
+		default:
+			printf ("Unknown Vendor ");
+			break;
+	}
+
+	/* check for top or bottom boot, if it applies */
+	if (info->flash_id & FLASH_BTYPE) {
+		boottype = botboottype;
+		bootletter = botbootletter;
+	} else {
+		boottype = topboottype;
+		bootletter = topbootletter;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+		case FLASH_28F128J3A:
+			fmt = "28F128J3 (128 Mbit, uniform sectors)\n";
+			break;
+		default:
+			fmt = "Unknown Chip Type\n";
+			break;
+	}
+
+	printf (fmt, bootletter, boottype);
+	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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+ulong flash_get_size (FPWV *addr, flash_info_t *info)
+{
+	int i;
+
+	/* Write auto select command: read Manufacturer ID */
+	/* Write auto select command sequence and test FLASH answer */
+	addr[FLASH_CYCLE1] = (FPW) INTEL_READID;	/* selects Intel or AMD */
+
+	/* The manufacturer codes are only 1 byte, so just use 1 byte.
+	 * This works for any bus width and any FLASH device width.
+	 */
+	udelay(100);
+	switch (addr[0] & 0xff) {
+		case (uchar)INTEL_MANUFACT:
+			info->flash_id = FLASH_MAN_INTEL;
+			break;
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			info->sector_count = 0;
+			info->size = 0;
+			break;
+	}
+
+	/* Strataflash is configurable to 8/16bit Bus,
+	 * but the Query-Structure is Word-orientated */
+	if (info->flash_id != FLASH_UNKNOWN) {
+		switch ((FPW)addr[2]) {
+			case (FPW)INTEL_ID_28F128J3:
+				info->flash_id += FLASH_28F128J3A;
+				info->sector_count = 128;
+				info->size = 0x01000000;
+				for( i = 0; i < info->sector_count; i++ )
+					info->start[i] = (ulong)addr + (i * 0x20000);
+				break;				/* => Intel Strataflash 16MB */
+			default:
+				printf("Flash_id != %xd\n", (FPW)addr[2]);
+				info->flash_id = FLASH_UNKNOWN;
+				info->sector_count = 0;
+				info->size = 0;
+				return (0);			/* => no or unknown flash */
+		}
+	}
+
+	/* Put FLASH back in read mode */
+	flash_reset(info);
+
+	return (info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	FPWV *addr;
+	int flag, prot, sect;
+	ulong start, now, last;
+	int rcode = 0;
+
+	if ((s_first < 0) || (s_first > s_last)) {
+		if (info->flash_id == FLASH_UNKNOWN) {
+			printf ("- missing\n");
+		} else {
+			printf ("- no sectors to erase\n");
+		}
+		return 1;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+		case FLASH_28F128J3A:
+			break;
+		case FLASH_UNKNOWN:
+		default:
+			printf ("Can't erase unknown flash type %08lx - aborted\n",
+					info->flash_id);
+			return 1;
+	}
+
+	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!",
+				prot);
+
+	printf ("\n");
+	last = get_timer(0);
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last && rcode == 0; sect++) {
+
+		if (info->protect[sect] != 0)	/* protected, skip it */
+			continue;
+
+		/* Disable interrupts which might cause a timeout here */
+		flag = disable_interrupts();
+
+		addr = (FPWV *)(info->start[sect]);
+		*addr = (FPW) INTEL_CLEAR; /* clear status register */
+		*addr = (FPW) INTEL_ERASE; /* erase setup */
+		*addr = (FPW) INTEL_CONFIRM; /* erase confirm */
+
+		/* re-enable interrupts if necessary */
+		if (flag)
+			enable_interrupts();
+
+		start = get_timer(0);
+
+		/* wait at least 80us for Intel - let's wait 1 ms */
+		udelay (1000);
+
+		while ((*addr & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) {
+			if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+				printf ("Timeout\n");
+				*addr = (FPW) INTEL_SUSPEND;/* suspend erase */
+				flash_reset(info);	/* reset to read mode */
+				rcode = 1;		/* failed */
+				break;
+			}
+
+			/* show that we're waiting */
+			if ((get_timer(last)) > CFG_HZ) { /* every second */
+				putc ('.');
+				last = get_timer(0);
+			}
+		}
+
+		flash_reset(info);	/* reset to read mode */
+	}
+
+	printf (" done\n");
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	FPW data = 0;	/* 16 or 32 bit word, matches flash bus width on MPC8XX */
+	int bytes;	/* number of bytes to program in current word		*/
+	int left;	/* number of bytes left to program			*/
+	int i, res;
+
+	for (left = cnt, res = 0;
+			left > 0 && res == 0;
+			addr += sizeof(data), left -= sizeof(data) - bytes) {
+
+		bytes = addr & (sizeof(data) - 1);
+		addr &= ~(sizeof(data) - 1);
+
+		/* combine source and destination data so can program
+		 * an entire word of 16 or 32 bits  */
+		for (i = 0; i < sizeof(data); i++) {
+			data <<= 8;
+			if (i < bytes || i - bytes >= left )
+				data += *((uchar *)addr + i);
+			else
+				data += *src++;
+		}
+
+		/* write one word to the flash */
+		switch (info->flash_id & FLASH_VENDMASK) {
+			case FLASH_MAN_INTEL:
+				res = write_data(info, (FPWV *)addr, data);
+				break;
+			default:
+				/* unknown flash type, error! */
+				printf ("missing or unknown FLASH type\n");
+				res = 1;	/* not really a timeout, but gives error */
+				break;
+		}
+	}
+
+	return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word or halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, FPWV *dest, FPW data)
+{
+	FPWV *addr = dest;
+	ulong status;
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*addr & data) != data) {
+		printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	*addr = (FPW) INTEL_PROGRAM;	/* write setup */
+	*addr = data;
+
+	/* arm simple, non interrupt dependent timer */
+	start = get_timer(0);
+
+	/* wait while polling the status register */
+	while (((status = *addr) & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			*addr = (FPW) INTEL_RESET;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	*addr = (FPW) INTEL_RESET;	/* restore read mode */
+	if (flag)
+		enable_interrupts();
+
+	return (0);
+}
+
+
+/*-----------------------------------------------------------------------
+ * Set/Clear sector's lock bit, returns:
+ * 0 - OK
+ * 1 - Error (timeout, voltage problems, etc.)
+ */
+int flash_real_protect (flash_info_t * info, long sector, int prot)
+{
+	ulong start;
+	int i;
+	int rc = 0;
+	FPWV *addr = (FPWV *) (info->start[sector]);
+	int flag = disable_interrupts ();
+
+	*addr = INTEL_CLEAR;	/* Clear status register    */
+	if (prot) {		/* Set sector lock bit      */
+		*addr = INTEL_LOCKBIT;	/* Sector lock bit          */
+		*addr = INTEL_PROTECT;	/* set                      */
+	} else {		/* Clear sector lock bit    */
+		*addr = INTEL_LOCKBIT;	/* All sectors lock bits    */
+		*addr = INTEL_CONFIRM;	/* clear                    */
+	}
+
+	start = get_timer (0);
+
+	while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
+		if (get_timer (start) > CFG_FLASH_UNLOCK_TOUT) {
+			printf ("Flash lock bit operation timed out\n");
+			rc = 1;
+			break;
+		}
+	}
+
+	if (*addr != INTEL_OK) {
+		printf ("Flash lock bit operation failed at %08X, CSR=%08X\n",
+			(uint) addr, (uint) * addr);
+		rc = 1;
+	}
+
+	if (!rc)
+		info->protect[sector] = prot;
+
+	/*
+	 * Clear lock bit command clears all sectors lock bits, so
+	 * we have to restore lock bits of protected sectors.
+	 */
+	if (!prot) {
+		for (i = 0; i < info->sector_count; i++) {
+			if (info->protect[i]) {
+				start = get_timer (0);
+				addr = (FPWV *) (info->start[i]);
+				*addr = INTEL_LOCKBIT;	/* Sector lock bit  */
+				*addr = INTEL_PROTECT;	/* set              */
+				while ((*addr & INTEL_FINISHED) !=
+				       INTEL_FINISHED) {
+					if (get_timer (start) >
+					    CFG_FLASH_UNLOCK_TOUT) {
+						printf ("Flash lock bit operation timed out\n");
+						rc = 1;
+						break;
+					}
+				}
+			}
+		}
+	}
+
+	if (flag)
+		enable_interrupts ();
+
+	*addr = INTEL_RESET;	/* Reset to read array mode */
+
+	return rc;
+}
+
+
+/*
+ * This function gets the u-boot flash sector protection status
+ * (flash_info_t.protect[]) in sync with the sector protection
+ * status stored in hardware.
+ */
+static void flash_sync_real_protect (flash_info_t * info)
+{
+	int i;
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F128J3A:
+		for (i = 0; i < info->sector_count; ++i) {
+			info->protect[i] = intel_sector_protected(info, i);
+		}
+		break;
+	default:
+		/* no h/w protect support */
+		break;
+	}
+}
+
+
+/*
+ * checks if "sector" in bank "info" is protected. Should work on intel
+ * strata flash chips 28FxxxJ3x in 8-bit mode.
+ * Returns 1 if sector is protected (or timed-out while trying to read
+ * protection status), 0 if it is not.
+ */
+static unsigned char intel_sector_protected (flash_info_t *info, ushort sector)
+{
+	FPWV *addr;
+	FPWV *lock_conf_addr;
+	ulong start;
+	unsigned char ret;
+
+	/*
+	 * first, wait for the WSM to be finished. The rationale for
+	 * waiting for the WSM to become idle for at most
+	 * CFG_FLASH_ERASE_TOUT is as follows. The WSM can be busy
+	 * because of: (1) erase, (2) program or (3) lock bit
+	 * configuration. So we just wait for the longest timeout of
+	 * the (1)-(3), i.e. the erase timeout.
+	 */
+
+	/* wait at least 35ns (W12) before issuing Read Status Register */
+	udelay(1);
+	addr = (FPWV *) info->start[sector];
+	*addr = (FPW) INTEL_STATUS;
+
+	start = get_timer (0);
+	while ((*addr & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) {
+		if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
+			*addr = (FPW) INTEL_RESET; /* restore read mode */
+			printf("WSM busy too long, can't get prot status\n");
+			return 1;
+		}
+	}
+
+	/* issue the Read Identifier Codes command */
+	*addr = (FPW) INTEL_READID;
+
+	/* wait at least 35ns (W12) before reading */
+	udelay(1);
+
+	/* Intel example code uses offset of 4 for 8-bit flash */
+	lock_conf_addr = (FPWV *) info->start[sector] + 4;
+	ret = (*lock_conf_addr & (FPW) INTEL_PROTECT) ? 1 : 0;
+
+	/* put flash back in read mode */
+	*addr = (FPW) INTEL_RESET;
+
+	return ret;
+}
+