Initial revision

1 files changed, 598 insertions, 0 deletions

diff --git a/board/ivm/flash.c b/board/ivm/flash.c
new file mode 100644
index 0000000..b5453df
--- /dev/null
+++ b/board/ivm/flash.c
@@ -0,0 +1,598 @@
+/*
+ * (C) Copyright 2000
+ * 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 <mpc8xx.h>
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+#if defined(CFG_ENV_IS_IN_FLASH)
+# 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
+# ifndef  CFG_ENV_SECT_SIZE
+#  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
+# endif
+#endif
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, ulong dest, ulong data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	unsigned long size_b0;
+	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 - FIXME XXX */
+
+	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
+
+	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
+		printf ("## Unknown FLASH on Bank 0: "
+			"ID 0x%lx, Size = 0x%08lx = %ld MB\n",
+			flash_info[0].flash_id,
+			size_b0, size_b0<<20);
+	}
+
+	/* Remap FLASH according to real size */
+	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
+	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | \
+				BR_MS_GPCM | BR_PS_16 | BR_V;
+
+	/* Re-do sizing to get full correct info */
+	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
+
+	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
+
+	flash_info[0].size = size_b0;
+
+#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_SECT_SIZE-1,
+		      &flash_info[0]);
+#endif
+
+	return (size_b0);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case FLASH_MAN_MT:
+	    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) * 0x00020000);
+		}
+	    } 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 * 0x00020000;
+		}
+	    }
+	    return;
+
+	case FLASH_MAN_SST:
+	    for (i = 0; i < info->sector_count; i++) {
+		info->start[i] = base + (i * 0x00002000);
+	    }
+	    return;
+
+	case FLASH_MAN_AMD:
+	case FLASH_MAN_FUJ:
+
+	    /* 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 + 0x00008000;
+		info->start[2] = base + 0x0000C000;
+		info->start[3] = base + 0x00010000;
+		for (i = 4; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00020000) - 0x00060000;
+		}
+	    } else {
+		/* set sector offsets for top boot block type		*/
+		i = info->sector_count - 1;
+		info->start[i--] = base + info->size - 0x00008000;
+		info->start[i--] = base + info->size - 0x0000C000;
+		info->start[i--] = base + info->size - 0x00010000;
+		for (; i >= 0; i--) {
+			info->start[i] = base + i * 0x00020000;
+		}
+	    }
+	    return;
+	default:
+	    printf ("Don't know sector ofsets for flash type 0x%lx\n",
+		info->flash_id);
+	    return;
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+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;
+	case FLASH_MAN_SST:	printf ("SST ");		break;
+	case FLASH_MAN_STM:	printf ("STM ");		break;
+	case FLASH_MAN_MT:	printf ("MT ");			break;
+	case FLASH_MAN_INTEL:	printf ("Intel ");		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;
+	case FLASH_SST200A:	printf ("39xF200A (2M = 128K x 16)\n");
+				break;
+	case FLASH_SST400A:	printf ("39xF400A (4M = 256K x 16)\n");
+				break;
+	case FLASH_SST800A:	printf ("39xF800A (8M = 512K x 16)\n");
+				break;
+	case FLASH_STM800AB:	printf ("M29W800AB (8M = 512K x 16)\n");
+				break;
+	case FLASH_28F008S5:	printf ("28F008S5 (1M = 64K x 16)\n");
+				break;
+	case FLASH_28F400_T:	printf ("28F400B3 (4Mbit, top boot sector)\n");
+				break;
+	case FLASH_28F400_B:	printf ("28F400B3 (4Mbit, bottom boot sector)\n");
+				break;
+	default:		printf ("Unknown Chip Type\n");
+				break;
+	}
+
+	if (info->size >= (1 << 20)) {
+		i = 20;
+	} else {
+		i = 10;
+	}
+	printf ("  Size: %ld %cB in %d Sectors\n",
+		info->size >> i,
+		(i == 20) ? 'M' : 'k',
+		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_long *addr, flash_info_t *info)
+{
+	ushort value;
+	vu_short *saddr = (vu_short *)addr;
+
+	/* Read Manufacturer ID */
+	saddr[0] = 0x0090;
+	value = saddr[0];
+
+	switch (value) {
+	case (AMD_MANUFACT & 0xFFFF):
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+	case (FUJ_MANUFACT & 0xFFFF):
+		info->flash_id = FLASH_MAN_FUJ;
+		break;
+	case (SST_MANUFACT & 0xFFFF):
+		info->flash_id = FLASH_MAN_SST;
+		break;
+	case (STM_MANUFACT & 0xFFFF):
+		info->flash_id = FLASH_MAN_STM;
+		break;
+	case (MT_MANUFACT & 0xFFFF):
+		info->flash_id = FLASH_MAN_MT;
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		saddr[0] = 0x00FF;		/* restore read mode */
+		return (0);			/* no or unknown flash	*/
+	}
+
+	value = saddr[1];			/* device ID		*/
+
+	switch (value) {
+	case (AMD_ID_LV400T & 0xFFFF):
+		info->flash_id += FLASH_AM400T;
+		info->sector_count = 11;
+		info->size = 0x00100000;
+		break;				/* => 1 MB		*/
+
+	case (AMD_ID_LV400B & 0xFFFF):
+		info->flash_id += FLASH_AM400B;
+		info->sector_count = 11;
+		info->size = 0x00100000;
+		break;				/* => 1 MB		*/
+
+	case (AMD_ID_LV800T & 0xFFFF):
+		info->flash_id += FLASH_AM800T;
+		info->sector_count = 19;
+		info->size = 0x00200000;
+		break;				/* => 2 MB		*/
+
+	case (AMD_ID_LV800B & 0xFFFF):
+		info->flash_id += FLASH_AM800B;
+		info->sector_count = 19;
+		info->size = 0x00200000;
+		break;				/* => 2 MB		*/
+
+	case (AMD_ID_LV160T & 0xFFFF):
+		info->flash_id += FLASH_AM160T;
+		info->sector_count = 35;
+		info->size = 0x00400000;
+		break;				/* => 4 MB		*/
+
+	case (AMD_ID_LV160B & 0xFFFF):
+		info->flash_id += FLASH_AM160B;
+		info->sector_count = 35;
+		info->size = 0x00400000;
+		break;				/* => 4 MB		*/
+#if 0	/* enable when device IDs are available */
+	case (AMD_ID_LV320T & 0xFFFF):
+		info->flash_id += FLASH_AM320T;
+		info->sector_count = 67;
+		info->size = 0x00800000;
+		break;				/* => 8 MB		*/
+
+	case (AMD_ID_LV320B & 0xFFFF):
+		info->flash_id += FLASH_AM320B;
+		info->sector_count = 67;
+		info->size = 0x00800000;
+		break;				/* => 8 MB		*/
+#endif
+	case (SST_ID_xF200A & 0xFFFF):
+		info->flash_id += FLASH_SST200A;
+		info->sector_count = 64;	/* 39xF200A ID ( 2M = 128K x 16	) */
+		info->size = 0x00080000;
+		break;
+	case (SST_ID_xF400A & 0xFFFF):
+		info->flash_id += FLASH_SST400A;
+		info->sector_count = 128;	/* 39xF400A ID ( 4M = 256K x 16	) */
+		info->size = 0x00100000;
+		break;
+	case (SST_ID_xF800A & 0xFFFF):
+		info->flash_id += FLASH_SST800A;
+		info->sector_count = 256;	/* 39xF800A ID ( 8M = 512K x 16	) */
+		info->size = 0x00200000;
+		break;				/* => 2 MB		*/
+	case (STM_ID_x800AB & 0xFFFF):
+		info->flash_id += FLASH_STM800AB;
+		info->sector_count = 19;
+		info->size = 0x00200000;
+		break;				/* => 2 MB		*/
+	case (MT_ID_28F400_T & 0xFFFF):
+		info->flash_id += FLASH_28F400_T;
+		info->sector_count = 7;
+		info->size = 0x00080000;
+		break;				/* => 512 kB		*/
+	case (MT_ID_28F400_B & 0xFFFF):
+		info->flash_id += FLASH_28F400_B;
+		info->sector_count = 7;
+		info->size = 0x00080000;
+		break;				/* => 512 kB		*/
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		saddr[0] = 0x00FF;		/* restore read mode */
+		return (0);			/* => no or unknown flash */
+
+	}
+
+	if (info->sector_count > CFG_MAX_FLASH_SECT) {
+		printf ("** ERROR: sector count %d > max (%d) **\n",
+			info->sector_count, CFG_MAX_FLASH_SECT);
+		info->sector_count = CFG_MAX_FLASH_SECT;
+	}
+
+	saddr[0] = 0x00FF;		/* restore read mode */
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+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;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_MT) {
+		printf ("Can erase only MT flash types - aborted\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 = get_timer (0);
+	last  = start;
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect<=s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			vu_short *addr = (vu_short *)(info->start[sect]);
+			unsigned short status;
+
+			/* Disable interrupts which might cause a timeout here */
+			flag = disable_interrupts();
+
+			*addr = 0x0050;	/* clear status register */
+			*addr = 0x0020;	/* erase setup */
+			*addr = 0x00D0;	/* erase confirm */
+
+			/* re-enable interrupts if necessary */
+			if (flag)
+				enable_interrupts();
+
+			/* wait at least 80us - let's wait 1 ms */
+			udelay (1000);
+
+			while (((status = *addr) & 0x0080) != 0x0080) {
+				if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout\n");
+					*addr = 0x00FF;	/* reset to read mode */
+					return 1;
+				}
+
+				/* show that we're waiting */
+				if ((now - last) > 1000) {	/* every second */
+					putc ('.');
+					last = now;
+				}
+			}
+
+			*addr = 0x00FF;	/* reset to read mode */
+		}
+	}
+	printf (" done\n");
+	return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+#define	FLASH_WIDTH	2	/* flash bus width in bytes */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong cp, wp, data;
+	int i, l, rc;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return 4;
+	}
+
+	wp = (addr & ~(FLASH_WIDTH-1));	/* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *)cp);
+		}
+
+		if ((rc = write_data(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += FLASH_WIDTH;
+	}
+
+	/*
+	 * handle FLASH_WIDTH aligned part
+	 */
+	while (cnt >= FLASH_WIDTH) {
+		data = 0;
+		for (i=0; i<FLASH_WIDTH; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_data(info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp  += FLASH_WIDTH;
+		cnt -= FLASH_WIDTH;
+	}
+
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+	}
+	for (; i<FLASH_WIDTH; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *)cp);
+	}
+
+	return (write_data(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, ulong data)
+{
+	vu_short *addr = (vu_short *)dest;
+	ushort sdata = (ushort)data;
+	ushort status;
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*addr & sdata) != sdata) {
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	*addr = 0x0040;		/* write setup */
+	*addr = sdata;
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	start = get_timer (0);
+
+	while (((status = *addr) & 0x0080) != 0x0080) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			*addr = 0x00FF;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	*addr = 0x00FF;		/* restore read mode */
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */