Initial revision

1 files changed, 377 insertions, 0 deletions

diff --git a/board/pm826/flash.c b/board/pm826/flash.c
new file mode 100644
index 0000000..4d5147b
--- /dev/null
+++ b/board/pm826/flash.c
@@ -0,0 +1,377 @@
+/*
+ * (C) Copyright 2001, 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Flash Routines for Intel devices
+ *
+ *--------------------------------------------------------------------
+ * 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 <mpc8xx.h>
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/*-----------------------------------------------------------------------
+ */
+ulong flash_get_size (volatile unsigned long *baseaddr,
+					  flash_info_t * info)
+{
+	short i;
+	unsigned long flashtest_h, flashtest_l;
+
+	info->sector_count = info->size = 0;
+	info->flash_id = FLASH_UNKNOWN;
+
+	/* Write query command sequence and test FLASH answer
+	 */
+	baseaddr[0] = 0x00980098;
+	baseaddr[1] = 0x00980098;
+
+	flashtest_h = baseaddr[0];	/* manufacturer ID	*/
+	flashtest_l = baseaddr[1];
+
+	if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)
+		return (0);		/* no or unknown flash	*/
+
+	flashtest_h = baseaddr[2];	/* device ID	        */
+	flashtest_l = baseaddr[3];
+
+	if (flashtest_h != flashtest_l)
+		return (0);
+
+	switch (flashtest_h) {
+	case INTEL_ID_28F160C3B:
+		info->flash_id = FLASH_28F160C3B;
+		info->sector_count = 39;
+		info->size = 0x00800000;	/* 4 * 2 MB = 8 MB	*/
+		break;
+	case INTEL_ID_28F160F3B:
+		info->flash_id = FLASH_28F160F3B;
+		info->sector_count = 39;
+		info->size = 0x00800000;	/* 4 * 2 MB = 8 MB      */
+		break;
+	default:
+		return (0);			/* no or unknown flash	*/
+	}
+
+	info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */
+
+	if (info->flash_id & FLASH_BTYPE) {
+		volatile unsigned long *tmp = baseaddr;
+
+		/* set up sector start adress table (bottom sector type)
+		 * AND unlock the sectors (if our chip is 160C3)
+		 */
+		for (i = 0; i < info->sector_count; i++) {
+			if ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) {
+				tmp[0] = 0x00600060;
+				tmp[1] = 0x00600060;
+				tmp[0] = 0x00D000D0;
+				tmp[1] = 0x00D000D0;
+			}
+			info->start[i] = (uint) tmp;
+			tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith       */
+		}
+	}
+
+	memset (info->protect, 0, info->sector_count);
+
+	baseaddr[0] = 0x00FF00FF;
+	baseaddr[1] = 0x00FF00FF;
+
+	return (info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+unsigned long flash_init (void)
+{
+	unsigned long size_b0 = 0;
+	int i;
+
+	/* Init: no FLASHes known
+	 */
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	/* Static FLASH Bank configuration here (only one bank) */
+
+	size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]);
+	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
+		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+				size_b0, size_b0 >> 20);
+	}
+
+	/* protect monitor and environment sectors
+	 */
+
+#ifndef CONFIG_BOOT_ROM
+	/* If U-Boot is  booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE
+	 * but we shouldn't protect it.
+	 */
+
+# if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_MONITOR_BASE,
+		       CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]
+	);
+# endif
+#endif	/* CONFIG_BOOT_ROM */
+
+#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
+# ifndef  CFG_ENV_SIZE
+#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
+# endif
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_ENV_ADDR,
+		       CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+#endif
+
+	return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+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 >> 16) & 0xff) {
+	case 0x89:
+		printf ("INTEL ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F160C3B:
+		printf ("28F160C3B (16 M, bottom sector)\n");
+		break;
+	case FLASH_28F160F3B:
+		printf ("28F160F3B (16 M, bottom sector)\n");
+		break;
+	default:
+		printf ("Unknown Chip Type\n");
+		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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int flag, prot, sect;
+	ulong start, now, last;
+
+	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;
+	}
+
+	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");
+	}
+
+	/* Start erase on unprotected sectors
+	 */
+	for (sect = s_first; sect <= s_last; sect++) {
+		volatile ulong *addr =
+				(volatile unsigned long *) info->start[sect];
+
+		start = get_timer (0);
+		last = start;
+		if (info->protect[sect] == 0) {
+			/* Disable interrupts which might cause a timeout here
+			 */
+			flag = disable_interrupts ();
+
+			/* Erase the block
+			 */
+			addr[0] = 0x00200020;
+			addr[1] = 0x00200020;
+			addr[0] = 0x00D000D0;
+			addr[1] = 0x00D000D0;
+
+			/* re-enable interrupts if necessary
+			 */
+			if (flag)
+				enable_interrupts ();
+
+			/* wait at least 80us - let's wait 1 ms
+			 */
+			udelay (1000);
+
+			last = start;
+			while ((addr[0] & 0x00800080) != 0x00800080 ||
+				   (addr[1] & 0x00800080) != 0x00800080) {
+				if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout (erase suspended!)\n");
+					/* Suspend erase
+					 */
+					addr[0] = 0x00B000B0;
+					addr[1] = 0x00B000B0;
+					goto DONE;
+				}
+				/* show that we're waiting
+				 */
+				if ((now - last) > 1000) {	/* every second */
+					serial_putc ('.');
+					last = now;
+				}
+			}
+			if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
+				printf ("*** ERROR: erase failed!\n");
+				goto DONE;
+			}
+		}
+		/* Clear status register and reset to read mode
+		 */
+		addr[0] = 0x00500050;
+		addr[1] = 0x00500050;
+		addr[0] = 0x00FF00FF;
+		addr[1] = 0x00FF00FF;
+	}
+
+	printf (" done\n");
+
+DONE:
+	return 0;
+}
+
+static int write_word (flash_info_t *, volatile unsigned long *, ulong);
+
+/*-----------------------------------------------------------------------
+ * 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)
+{
+	ulong v;
+	int i, l, cc = cnt, res = 0;
+
+
+	for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
+		l = (addr & 3);
+		addr &= ~3;
+
+		for (i = 0; i < 4; i++) {
+			v = (v << 8) + (i < l || i - l >= cc ?
+				*((unsigned char *) addr + i) : *src++);
+		}
+
+		if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
+			break;
+	}
+
+	return (res);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t * info, volatile unsigned long *addr,
+					   ulong data)
+{
+	int flag, res = 0;
+	ulong start;
+
+	/* Check if Flash is (sufficiently) erased
+	 */
+	if ((*addr & data) != data)
+		return (2);
+
+	/* Disable interrupts which might cause a timeout here
+	 */
+	flag = disable_interrupts ();
+
+	*addr = 0x00400040;
+	*addr = data;
+
+	/* re-enable interrupts if necessary
+	 */
+	if (flag)
+		enable_interrupts ();
+
+	start = get_timer (0);
+	while ((*addr & 0x00800080) != 0x00800080) {
+		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+			/* Suspend program
+			 */
+			*addr = 0x00B000B0;
+			res = 1;
+			goto OUT;
+		}
+	}
+
+	if (*addr & 0x00220022) {
+		printf ("*** ERROR: program failed!\n");
+		res = 1;
+	}
+
+OUT:
+	/* Clear status register and reset to read mode
+	 */
+	*addr = 0x00500050;
+	*addr = 0x00FF00FF;
+
+	return (res);
+}