From affae2bff825c1a8d2cfeaf7b270188d251d39d2 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Sat, 17 Aug 2002 09:36:01 +0000
Subject: Initial revision

---
 board/tqm8260/flash.c | 488 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 488 insertions(+)
 create mode 100644 board/tqm8260/flash.c

(limited to 'board/tqm8260/flash.c')

diff --git a/board/tqm8260/flash.c b/board/tqm8260/flash.c
new file mode 100644
index 0000000..dd7a4cc
--- /dev/null
+++ b/board/tqm8260/flash.c
@@ -0,0 +1,488 @@
+/*
+ * (C) Copyright 2001, 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Flash Routines for AMD devices on the TQM8260 board
+ *
+ *--------------------------------------------------------------------
+ * 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>
+
+#define V_ULONG(a)	(*(volatile unsigned long *)( a ))
+#define V_BYTE(a)	(*(volatile unsigned char *)( a ))
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+
+/*-----------------------------------------------------------------------
+ */
+void flash_reset (void)
+{
+	if (flash_info[0].flash_id != FLASH_UNKNOWN) {
+		V_ULONG (flash_info[0].start[0]) = 0x00F000F0;
+		V_ULONG (flash_info[0].start[0] + 4) = 0x00F000F0;
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+ulong flash_get_size (ulong baseaddr, flash_info_t * info)
+{
+	short i;
+	unsigned long flashtest_h, flashtest_l;
+
+	/* Write auto select command sequence and test FLASH answer */
+	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (baseaddr + ((ulong) 0x02AA << 3)) = 0x00550055;
+	V_ULONG (baseaddr + ((ulong) 0x0555 << 3)) = 0x00900090;
+	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (baseaddr + 4 + ((ulong) 0x02AA << 3)) = 0x00550055;
+	V_ULONG (baseaddr + 4 + ((ulong) 0x0555 << 3)) = 0x00900090;
+
+	flashtest_h = V_ULONG (baseaddr);	/* manufacturer ID     */
+	flashtest_l = V_ULONG (baseaddr + 4);
+
+	switch ((int) flashtest_h) {
+	case AMD_MANUFACT:
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+	case FUJ_MANUFACT:
+		info->flash_id = FLASH_MAN_FUJ;
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		return (0);			/* no or unknown flash     */
+	}
+
+	flashtest_h = V_ULONG (baseaddr + 8);	/* device ID           */
+	flashtest_l = V_ULONG (baseaddr + 12);
+	if (flashtest_h != flashtest_l) {
+		info->flash_id = FLASH_UNKNOWN;
+	} else {
+		switch (flashtest_h) {
+		case AMD_ID_LV800T:
+			info->flash_id += FLASH_AM800T;
+			info->sector_count = 19;
+			info->size = 0x00400000;
+			break;			/* 4 * 1 MB = 4 MB  */
+		case AMD_ID_LV800B:
+			info->flash_id += FLASH_AM800B;
+			info->sector_count = 19;
+			info->size = 0x00400000;
+			break;			/* 4 * 1 MB = 4 MB  */
+		case AMD_ID_LV160T:
+			info->flash_id += FLASH_AM160T;
+			info->sector_count = 35;
+			info->size = 0x00800000;
+			break;			/* 4 * 2 MB = 8 MB  */
+		case AMD_ID_LV160B:
+			info->flash_id += FLASH_AM160B;
+			info->sector_count = 35;
+			info->size = 0x00800000;
+			break;			/* 4 * 2 MB = 8 MB  */
+		case AMD_ID_DL322T:
+			info->flash_id += FLASH_AMDL322T;
+			info->sector_count = 71;
+			info->size = 0x01000000;
+			break;			/* 4 * 4 MB = 16 MB */
+		case AMD_ID_DL322B:
+			info->flash_id += FLASH_AMDL322B;
+			info->sector_count = 71;
+			info->size = 0x01000000;
+			break;			/* 4 * 4 MB = 16 MB */
+		case AMD_ID_DL323T:
+			info->flash_id += FLASH_AMDL323T;
+			info->sector_count = 71;
+			info->size = 0x01000000;
+			break;			/* 4 * 4 MB = 16 MB */
+		case AMD_ID_DL323B:
+			info->flash_id += FLASH_AMDL323B;
+			info->sector_count = 71;
+			info->size = 0x01000000;
+			break;			/* 4 * 4 MB = 16 MB */
+		case AMD_ID_LV640U:
+			info->flash_id += FLASH_AM640U;
+			info->sector_count = 128;
+			info->size = 0x02000000;
+			break;			/* 4 * 8 MB = 32 MB */
+		default:
+			info->flash_id = FLASH_UNKNOWN;
+			return (0);		/* no or unknown flash     */
+		}
+	}
+
+	if (flashtest_h == AMD_ID_LV640U) {
+
+		/* set up sector start adress table (uniform sector type) */
+		for (i = 0; i < info->sector_count; i++)
+			info->start[i] = baseaddr + (i * 0x00040000);
+
+	} else if (info->flash_id & FLASH_BTYPE) {
+
+		/* set up sector start adress table (bottom sector type) */
+		info->start[0] = baseaddr + 0x00000000;
+		info->start[1] = baseaddr + 0x00010000;
+		info->start[2] = baseaddr + 0x00018000;
+		info->start[3] = baseaddr + 0x00020000;
+		for (i = 4; i < info->sector_count; i++) {
+			info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000;
+		}
+
+	} else {
+
+		/* set up sector start adress table (top sector type) */
+		i = info->sector_count - 1;
+		info->start[i--] = baseaddr + info->size - 0x00010000;
+		info->start[i--] = baseaddr + info->size - 0x00018000;
+		info->start[i--] = baseaddr + info->size - 0x00020000;
+		for (; i >= 0; i--) {
+			info->start[i] = baseaddr + i * 0x00040000;
+		}
+	}
+
+	/* check for protected sectors */
+	for (i = 0; i < info->sector_count; i++) {
+		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
+		if ((V_ULONG (info->start[i] + 16) & 0x00010001) ||
+			(V_ULONG (info->start[i] + 20) & 0x00010001)) {
+			info->protect[i] = 1;	/* D0 = 1 if protected */
+		} else {
+			info->protect[i] = 0;
+		}
+	}
+
+	flash_reset ();
+	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 (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
+	 */
+
+#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
+
+#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 & FLASH_VENDMASK) {
+	case FLASH_MAN_AMD:
+		printf ("AMD ");
+		break;
+	case FLASH_MAN_FUJ:
+		printf ("FUJITSU ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AM800T:
+		printf ("29LV800T (8 M, top sector)\n");
+		break;
+	case FLASH_AM800B:
+		printf ("29LV800T (8 M, bottom sector)\n");
+		break;
+	case FLASH_AM160T:
+		printf ("29LV160T (16 M, top sector)\n");
+		break;
+	case FLASH_AM160B:
+		printf ("29LV160B (16 M, bottom sector)\n");
+		break;
+	case FLASH_AMDL322T:
+		printf ("29DL322T (32 M, top sector)\n");
+		break;
+	case FLASH_AMDL322B:
+		printf ("29DL322B (32 M, bottom sector)\n");
+		break;
+	case FLASH_AMDL323T:
+		printf ("29DL323T (32 M, top sector)\n");
+		break;
+	case FLASH_AMDL323B:
+		printf ("29DL323B (32 M, bottom sector)\n");
+		break;
+	case FLASH_AM640U:
+		printf ("29LV640D (64 M, uniform 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");
+	return;
+}
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int flag, prot, sect, l_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");
+	}
+
+	l_sect = -1;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
+	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00800080;
+	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
+	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
+	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00800080;
+	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
+	udelay (1000);
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			V_ULONG (info->start[sect]) = 0x00300030;
+			V_ULONG (info->start[sect] + 4) = 0x00300030;
+			l_sect = sect;
+		}
+	}
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts ();
+
+	/* wait at least 80us - let's wait 1 ms */
+	udelay (1000);
+
+	/*
+	 * We wait for the last triggered sector
+	 */
+	if (l_sect < 0)
+		goto DONE;
+
+	start = get_timer (0);
+	last = start;
+	while ((V_ULONG (info->start[l_sect]) & 0x00800080) != 0x00800080 ||
+	       (V_ULONG (info->start[l_sect] + 4) & 0x00800080) != 0x00800080)
+	{
+		if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
+			printf ("Timeout\n");
+			return 1;
+		}
+		/* show that we're waiting */
+		if ((now - last) > 1000) {	/* every second */
+			serial_putc ('.');
+			last = now;
+		}
+	}
+
+  DONE:
+	/* reset to read mode */
+	flash_reset ();
+
+	printf (" done\n");
+	return 0;
+}
+
+static int write_dword (flash_info_t *, ulong, unsigned char *);
+
+/*-----------------------------------------------------------------------
+ * 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 dp;
+	static unsigned char bb[8];
+	int i, l, rc, cc = cnt;
+
+	dp = (addr & ~7);		/* get lower dword aligned address */
+
+	/*
+	 * handle unaligned start bytes
+	 */
+	if ((l = addr - dp) != 0) {
+		for (i = 0; i < 8; i++)
+			bb[i] = (i < l || (i - l) >= cc) ? V_BYTE (dp + i) : *src++;
+		if ((rc = write_dword (info, dp, bb)) != 0) {
+			return (rc);
+		}
+		dp += 8;
+		cc -= 8 - l;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cc >= 8) {
+		if ((rc = write_dword (info, dp, src)) != 0) {
+			return (rc);
+		}
+		dp += 8;
+		src += 8;
+		cc -= 8;
+	}
+
+	if (cc <= 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	for (i = 0; i < 8; i++) {
+		bb[i] = (i < cc) ? *src++ : V_BYTE (dp + i);
+	}
+	return (write_dword (info, dp, bb));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a dword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_dword (flash_info_t * info, ulong dest, unsigned char *pdata)
+{
+	ulong start, cl, ch;
+	int flag, i;
+
+	for (ch = 0, i = 0; i < 4; i++)
+		ch = (ch << 8) + *pdata++;	/* high word    */
+	for (cl = 0, i = 0; i < 4; i++)
+		cl = (cl << 8) + *pdata++;	/* low word */
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((vu_long *) dest) & ch) != ch
+		|| (*((vu_long *) (dest + 4)) & cl) != cl) {
+		return (2);
+	}
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (info->start[0] + (0x02AA << 3)) = 0x00550055;
+	V_ULONG (info->start[0] + (0x0555 << 3)) = 0x00A000A0;
+	V_ULONG (dest) = ch;
+	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00AA00AA;
+	V_ULONG (info->start[0] + 4 + (0x02AA << 3)) = 0x00550055;
+	V_ULONG (info->start[0] + 4 + (0x0555 << 3)) = 0x00A000A0;
+	V_ULONG (dest + 4) = cl;
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts ();
+
+	/* data polling for D7 */
+	start = get_timer (0);
+	while (((V_ULONG (dest) & 0x00800080) != (ch & 0x00800080)) ||
+		   ((V_ULONG (dest + 4) & 0x00800080) != (cl & 0x00800080))) {
+		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
+			return (1);
+		}
+	}
+	return (0);
+}
-- 
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