Initial revision

1 files changed, 523 insertions, 0 deletions

diff --git a/board/sacsng/flash.c b/board/sacsng/flash.c
new file mode 100644
index 0000000..4fd04df
--- /dev/null
+++ b/board/sacsng/flash.c
@@ -0,0 +1,523 @@
+/*
+ * (C) Copyright 2001
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <configs/sacsng.h>
+
+
+#undef  DEBUG
+
+#ifndef	CFG_ENV_ADDR
+#define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
+#endif
+#ifndef CFG_ENV_SIZE
+#define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
+#endif
+
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_short *addr, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	unsigned long size_b0, size_b1;
+	int i;
+
+	/* Init: no FLASHes known */
+	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+		flash_info[i].flash_id = FLASH_UNKNOWN;
+	}
+
+	size_b0 = flash_get_size((vu_short *)CFG_FLASH0_BASE, &flash_info[0]);
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+			size_b0, size_b0<<20);
+	}
+
+	size_b1 = flash_get_size((vu_short *)CFG_FLASH1_BASE, &flash_info[1]);
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+	/* monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET,
+		      CFG_MONITOR_BASE,
+		      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		      &flash_info[0]);
+#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_info[0]);
+#endif
+
+	if (size_b1) {
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+		/* monitor protection ON by default */
+		flash_protect(FLAG_PROTECT_SET,
+			      CFG_MONITOR_BASE,
+			      CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+			      &flash_info[1]);
+#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_info[1]);
+#endif
+	} else {
+		flash_info[1].flash_id = FLASH_UNKNOWN;
+		flash_info[1].sector_count = -1;
+	}
+
+	flash_info[0].size = size_b0;
+	flash_info[1].size = size_b1;
+
+	/*
+	 * We only report the primary flash for U-Boot's use.
+	 */
+	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_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
+				break;
+	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
+				break;
+	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot 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;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size (vu_short *addr, flash_info_t *info)
+{
+	short i;
+	ushort value;
+	ulong  base = (ulong)addr;
+
+	/* Write auto select command: read Manufacturer ID */
+	addr[0x0555] = 0xAAAA;
+	addr[0x02AA] = 0x5555;
+	addr[0x0555] = 0x9090;
+	__asm__ __volatile__(" sync\n ");
+
+	value = addr[0];
+#ifdef DEBUG
+	printf("Flash manufacturer 0x%04X\n", value);
+#endif
+
+	if(value == (ushort)AMD_MANUFACT) {
+		info->flash_id = FLASH_MAN_AMD;
+	} else if (value == (ushort)FUJ_MANUFACT) {
+		info->flash_id = FLASH_MAN_FUJ;
+	} else {
+#ifdef DEBUG
+		printf("Unknown flash manufacturer 0x%04X\n", value);
+#endif
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		return (0);			/* no or unknown flash	*/
+	}
+
+	value = addr[1];			/* device ID		*/
+#ifdef DEBUG
+	printf("Flash type 0x%04X\n", value);
+#endif
+
+	if(value == (ushort)AMD_ID_LV400T) {
+		info->flash_id += FLASH_AM400T;
+		info->sector_count = 11;
+		info->size = 0x00080000;	/* => 0.5 MB		*/
+	} else if(value == (ushort)AMD_ID_LV400B) {
+		info->flash_id += FLASH_AM400B;
+		info->sector_count = 11;
+		info->size = 0x00080000;	/* => 0.5 MB		*/
+	} else if(value == (ushort)AMD_ID_LV800T) {
+		info->flash_id += FLASH_AM800T;
+		info->sector_count = 19;
+		info->size = 0x00100000;	/* => 1 MB		*/
+	} else if(value == (ushort)AMD_ID_LV800B) {
+		info->flash_id += FLASH_AM800B;
+		info->sector_count = 19;
+		info->size = 0x00100000;	/* => 1 MB		*/
+	} else if(value == (ushort)AMD_ID_LV160T) {
+		info->flash_id += FLASH_AM160T;
+		info->sector_count = 35;
+		info->size = 0x00200000;	/* => 2 MB		*/
+	} else if(value == (ushort)AMD_ID_LV160B) {
+		info->flash_id += FLASH_AM160B;
+		info->sector_count = 35;
+		info->size = 0x00200000;	/* => 2 MB		*/
+	} else if(value == (ushort)AMD_ID_LV320T) {
+		info->flash_id += FLASH_AM320T;
+		info->sector_count = 67;
+		info->size = 0x00400000;	/* => 4 MB		*/
+	} else if(value == (ushort)AMD_ID_LV320B) {
+		info->flash_id += FLASH_AM320B;
+		info->sector_count = 67;
+		info->size = 0x00400000;	/* => 4 MB		*/
+	} else {
+#ifdef DEBUG
+		printf("Unknown flash type 0x%04X\n", value);
+		info->size = CFG_FLASH_SIZE;
+#else
+		info->flash_id = FLASH_UNKNOWN;
+		return (0);			/* => no or unknown flash */
+#endif
+	}
+
+	/* set up sector start address table */
+	if (info->flash_id & FLASH_BTYPE) {
+		/* set sector offsets for bottom boot block type	*/
+		info->start[0] = base + 0x00000000;
+		info->start[1] = base + 0x00004000;
+		info->start[2] = base + 0x00006000;
+		info->start[3] = base + 0x00008000;
+		for (i = 4; i < info->sector_count; i++) {
+			info->start[i] = base + ((i - 3) * 0x00010000);
+		}
+	} else {
+		/* set sector offsets for top boot block type		*/
+		i = info->sector_count - 1;
+		info->start[i--] = base + info->size - 0x00004000;
+		info->start[i--] = base + info->size - 0x00006000;
+		info->start[i--] = base + info->size - 0x00008000;
+		for (; i >= 0; i--) {
+			info->start[i] = base + (i * 0x00010000);
+		}
+	}
+
+	/* check for protected sectors */
+	for (i = 0; i < info->sector_count; i++) {
+		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
+		/* D0 = 1 if protected */
+		addr = (volatile unsigned short *)(info->start[i]);
+		info->protect[i] = addr[2] & 1;
+	}
+
+	/*
+	 * Prevent writes to uninitialized FLASH.
+	 */
+	if (info->flash_id != FLASH_UNKNOWN) {
+		addr = (volatile unsigned short *)info->start[0];
+
+	}
+
+	addr[0] = 0xF0F0;	/* reset bank */
+	__asm__ __volatile__(" sync\n ");
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	vu_short *addr = (vu_short*)(info->start[0]);
+	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;
+	}
+
+	if ((info->flash_id == FLASH_UNKNOWN) ||
+	    (info->flash_id > FLASH_AMD_COMP)) {
+		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!\n",
+			prot);
+	} else {
+		printf ("\n");
+	}
+
+	l_sect = -1;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	addr[0x0555] = 0xAAAA;
+	addr[0x02AA] = 0x5555;
+	addr[0x0555] = 0x8080;
+	addr[0x0555] = 0xAAAA;
+	addr[0x02AA] = 0x5555;
+	__asm__ __volatile__(" sync\n ");
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect<=s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			addr = (vu_short*)(info->start[sect]);
+			addr[0] = 0x3030;
+			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;
+	addr = (vu_short*)(info->start[l_sect]);
+	while ((addr[0] & 0x0080) != 0x0080) {
+		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+			printf ("Timeout\n");
+			addr[0] = 0xF0F0;	/* reset bank */
+			__asm__ __volatile__(" sync\n ");
+			return 1;
+		}
+		/* show that we're waiting */
+		if ((now - last) > 1000) {	/* every second */
+			putc ('.');
+			last = now;
+		}
+	}
+
+DONE:
+	/* reset to read mode */
+	addr = (vu_short*)info->start[0];
+	addr[0] = 0xF0F0;	/* reset bank */
+	__asm__ __volatile__(" sync\n ");
+
+	printf (" done\n");
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * 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 cp, wp, data;
+	int i, l, rc;
+
+	wp = (addr & ~3);	/* 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);
+		}
+		for (; i<4 && cnt>0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt==0 && i<4; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+
+		if ((rc = write_word(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 4;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 4) {
+		data = 0;
+		for (i=0; i<4; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_word(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp  += 4;
+		cnt -= 4;
+	}
+
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+	}
+	for (; i<4; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *)cp);
+	}
+
+	return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+	vu_short *addr = (vu_short*)(info->start[0]);
+	ulong start;
+	int flag;
+	int j;
+
+	/* Check if Flash is (sufficiently) erased */
+	if (((*(vu_long *)dest) & data) != data) {
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	/* The original routine was designed to write 32 bit words to
+	 * 32 bit wide memory.	We have 16 bit wide memory so we do
+	 * two writes.	We write the LSB first at dest+2 and then the
+	 * MSB at dest (lousy big endian).
+	 */
+	dest += 2;
+	for(j = 0; j < 2; j++) {
+		addr[0x0555] = 0xAAAA;
+		addr[0x02AA] = 0x5555;
+		addr[0x0555] = 0xA0A0;
+		__asm__ __volatile__(" sync\n ");
+
+		*((vu_short *)dest) = (ushort)data;
+
+		/* re-enable interrupts if necessary */
+		if (flag)
+			enable_interrupts();
+
+		/* data polling for D7 */
+		start = get_timer (0);
+		while (*(vu_short *)dest != (ushort)data) {
+			if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+				return (1);
+			}
+		}
+		dest -= 2;
+		data >>= 16;
+	}
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */