Initial revision

1 files changed, 499 insertions, 0 deletions

diff --git a/board/netvia/flash.c b/board/netvia/flash.c
new file mode 100644
index 0000000000..4204c34193
--- /dev/null
+++ b/board/netvia/flash.c
@@ -0,0 +1,499 @@
+/*
+ * (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    */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size(vu_long * addr, flash_info_t * info);
+static int write_byte(flash_info_t * info, ulong dest, uchar 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;
+	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 = 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 - Size = 0x%08lx = %ld MB\n", size, size << 20);
+	}
+
+	/* Remap FLASH according to real size */
+	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
+	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
+
+	/* Re-do sizing to get full correct info */
+	size = flash_get_size((vu_long *) CFG_FLASH_BASE, &flash_info[0]);
+
+	flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]);
+
+	/* monitor protection ON by default */
+	flash_protect(FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]);
+
+	flash_info[0].size = size;
+
+	return (size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets(ulong base, flash_info_t * info)
+{
+	int i;
+
+	/* set up sector start address table */
+	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00010000);
+		}
+	} else 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 * 0x00010000) - 0x00030000;
+		}
+	} 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;
+		}
+	}
+
+}
+
+/*-----------------------------------------------------------------------
+ */
+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_MX:
+		printf("MXIC ");
+		break;
+	default:
+		printf("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_AM040:
+		printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
+		break;
+	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");
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+
+/*-----------------------------------------------------------------------
+ */
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size(vu_long * addr, flash_info_t * info)
+{
+	short i;
+	uchar mid;
+	uchar pid;
+	vu_char *caddr = (vu_char *) addr;
+	ulong base = (ulong) addr;
+
+
+	/* Write auto select command: read Manufacturer ID */
+	caddr[0x0555] = 0xAA;
+	caddr[0x02AA] = 0x55;
+	caddr[0x0555] = 0x90;
+
+	mid = caddr[0];
+	switch (mid) {
+	case (AMD_MANUFACT & 0xFF):
+		info->flash_id = FLASH_MAN_AMD;
+		break;
+	case (FUJ_MANUFACT & 0xFF):
+		info->flash_id = FLASH_MAN_FUJ;
+		break;
+	case (MX_MANUFACT & 0xFF):
+		info->flash_id = FLASH_MAN_MX;
+		break;
+	case (STM_MANUFACT & 0xFF):
+		info->flash_id = FLASH_MAN_STM;
+		break;
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		return (0);				/* no or unknown flash  */
+	}
+
+	pid = caddr[1];				/* device ID        */
+	switch (pid) {
+	case (AMD_ID_LV400T & 0xFF):
+		info->flash_id += FLASH_AM400T;
+		info->sector_count = 11;
+		info->size = 0x00080000;
+		break;					/* => 512 kB        */
+
+	case (AMD_ID_LV400B & 0xFF):
+		info->flash_id += FLASH_AM400B;
+		info->sector_count = 11;
+		info->size = 0x00080000;
+		break;					/* => 512 kB        */
+
+	case (AMD_ID_LV800T & 0xFF):
+		info->flash_id += FLASH_AM800T;
+		info->sector_count = 19;
+		info->size = 0x00100000;
+		break;					/* => 1 MB      */
+
+	case (AMD_ID_LV800B & 0xFF):
+		info->flash_id += FLASH_AM800B;
+		info->sector_count = 19;
+		info->size = 0x00100000;
+		break;					/* => 1 MB      */
+
+	case (AMD_ID_LV160T & 0xFF):
+		info->flash_id += FLASH_AM160T;
+		info->sector_count = 35;
+		info->size = 0x00200000;
+		break;					/* => 2 MB      */
+
+	case (AMD_ID_LV160B & 0xFF):
+		info->flash_id += FLASH_AM160B;
+		info->sector_count = 35;
+		info->size = 0x00200000;
+		break;					/* => 2 MB      */
+
+	case (AMD_ID_LV040B & 0xFF):
+		info->flash_id += FLASH_AM040;
+		info->sector_count = 8;
+		info->size = 0x00080000;
+		break;
+
+	case (STM_ID_M29W040B & 0xFF):
+		info->flash_id += FLASH_AM040;
+		info->sector_count = 8;
+		info->size = 0x00080000;
+		break;
+
+#if 0							/* enable when device IDs are available */
+	case (AMD_ID_LV320T & 0xFF):
+		info->flash_id += FLASH_AM320T;
+		info->sector_count = 67;
+		info->size = 0x00400000;
+		break;					/* => 4 MB      */
+
+	case (AMD_ID_LV320B & 0xFF):
+		info->flash_id += FLASH_AM320B;
+		info->sector_count = 67;
+		info->size = 0x00400000;
+		break;					/* => 4 MB      */
+#endif
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		return (0);				/* => no or unknown flash */
+
+	}
+
+	printf(" ");
+	/* set up sector start address table */
+	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * 0x00010000);
+		}
+	} else 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 * 0x00010000) - 0x00030000;
+		}
+	} 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: D0 = 1 if protected */
+		caddr = (volatile unsigned char *)(info->start[i]);
+		info->protect[i] = caddr[2] & 1;
+	}
+
+	/*
+	 * Prevent writes to uninitialized FLASH.
+	 */
+	if (info->flash_id != FLASH_UNKNOWN) {
+		caddr = (vu_char *) info->start[0];
+
+		caddr[0x0555] = 0xAA;
+		caddr[0x02AA] = 0x55;
+		caddr[0x0555] = 0xF0;
+
+		udelay(20000);
+	}
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+	vu_char *addr = (vu_char *) (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] = 0xAA;
+	addr[0x02AA] = 0x55;
+	addr[0x0555] = 0x80;
+	addr[0x0555] = 0xAA;
+	addr[0x02AA] = 0x55;
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			addr = (vu_char *) (info->start[sect]);
+			addr[0] = 0x30;
+			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_char *) (info->start[l_sect]);
+	while ((addr[0] & 0x80) != 0x80) {
+		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 */
+			putc('.');
+			last = now;
+		}
+	}
+
+  DONE:
+	/* reset to read mode */
+	addr = (vu_char *) info->start[0];
+	addr[0] = 0xF0;				/* reset bank */
+
+	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)
+{
+	int rc;
+
+	while (cnt > 0) {
+		if ((rc = write_byte(info, addr++, *src++)) != 0) {
+			return (rc);
+		}
+		--cnt;
+	}
+
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_byte(flash_info_t * info, ulong dest, uchar data)
+{
+	vu_char *addr = (vu_char *) (info->start[0]);
+	ulong start;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*((vu_char *) dest) & data) != data) {
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts();
+
+	addr[0x0555] = 0xAA;
+	addr[0x02AA] = 0x55;
+	addr[0x0555] = 0xA0;
+
+	*((vu_char *) dest) = data;
+
+	/* re-enable interrupts if necessary */
+	if (flag)
+		enable_interrupts();
+
+	/* data polling for D7 */
+	start = get_timer(0);
+	while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
+		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+			return (1);
+		}
+	}
+	return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */