Add board support for armadillo HT1070

Patch by Rowel Atienza, 06 Apr 2005

1 files changed, 336 insertions, 0 deletions

diff --git a/board/armadillo/flash.c b/board/armadillo/flash.c
new file mode 100644
index 0000000..f25a8e7
--- /dev/null
+++ b/board/armadillo/flash.c
@@ -0,0 +1,336 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
+ * Flash driver for armadillo board HT1070
+ *
+ * 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>
+
+#define FLASH_BANK_SIZE 0x400000
+
+/*value used by hermit is 0x200*/
+/*document says sector size is either 64k in low mem reg and 8k in high mem reg*/
+#define MAIN_SECT_SIZE  0x10000
+
+#define UNALIGNED_MASK (3)
+#define FL_WORD(addr) (*(volatile unsigned short*)(addr))
+#define FLASH_TIMEOUT 20000000
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+/*-----------------------------------------------------------------------
+ */
+
+ulong flash_init (void)
+{
+	int i, j;
+	ulong size = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		ulong flashbase = 0;
+
+		flash_info[i].flash_id = (FUJ_MANUFACT & FLASH_VENDMASK);
+		/*(INTEL_ID_28F128J3 & FLASH_TYPEMASK); */
+		flash_info[i].size = FLASH_BANK_SIZE;
+		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+		memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+		if (i == 0)
+			flashbase = PHYS_FLASH_1;
+		else
+			panic ("configured too many flash banks!\n");
+		for (j = 0; j < flash_info[i].sector_count; j++) {
+			flash_info[i].start[j] =
+				flashbase + j * MAIN_SECT_SIZE;
+		}
+		size += flash_info[i].size;
+	}
+
+	/* Protect monitor and environment sectors
+	 */
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_FLASH_BASE,
+		       CFG_FLASH_BASE + monitor_flash_len - 1,
+		       &flash_info[0]);
+
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_ENV_ADDR,
+		       CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
+
+	return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case (FUJ_MANUFACT & FLASH_VENDMASK):
+		printf ("Fujitsu: ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+/*
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
+		printf ("28F128J3 (128Mbit)\n");
+		break;
+	default:
+		printf ("Unknown Chip Type\n");
+		goto Done;
+		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");
+
+      Done:
+}
+
+/*
+ *  * Loop until both write state machines complete.
+ *   */
+static unsigned short flash_status_wait (unsigned long addr,
+					 unsigned short value)
+{
+	unsigned short status;
+	long timeout = FLASH_TIMEOUT;
+
+	while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
+		timeout--;
+	}
+	return status;
+}
+
+/*
+ * Loop until the Write State machine is ready, then do a full error
+ * check.  Clear status and leave the flash in Read Array mode; return
+ * 0 for no error, -1 for error.
+ */
+static int flash_status_full_check (unsigned long addr, unsigned short value1,
+				    unsigned short value2)
+{
+	unsigned short status1, status2;
+
+	status1 = flash_status_wait (addr, value1);
+	status2 = flash_status_wait (addr + 2, value2);
+	return (status1 != value1 || status2 != value2) ? -1 : 0;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	int flag, prot, sect;
+	int rc = ERR_OK;
+	unsigned long base;
+	unsigned long addr;
+
+	if ((info->flash_id & FLASH_VENDMASK) !=
+	    (FUJ_MANUFACT & FLASH_VENDMASK)) {
+		return ERR_UNKNOWN_FLASH_VENDOR;
+	}
+
+	prot = 0;
+	for (sect = s_first; sect <= s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+	if (prot)
+		return ERR_PROTECTED;
+
+	/*
+	 * Disable interrupts which might cause a timeout
+	 * here. Remember that our exception vectors are
+	 * at address 0 in the flash, and we don't want a
+	 * (ticker) exception to happen while the flash
+	 * chip is in programming mode.
+	 */
+	flag = disable_interrupts ();
+
+	printf ("Erasing %d sectors starting at sector %2d.\n"
+		"This make take some time ... ",
+		s_last - s_first, sect);
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
+		/* ARM simple, non interrupt dependent timer */
+		reset_timer_masked ();
+
+		if (info->protect[sect] == 0) {	/* not protected */
+
+			addr = sect * MAIN_SECT_SIZE;
+			addr &= ~(unsigned long) UNALIGNED_MASK;	/* word align */
+			base = addr & 0xF0000000;
+
+			FL_WORD (base + (0x555 << 1)) = 0xAA;
+			FL_WORD (base + (0x2AA << 1)) = 0x55;
+			FL_WORD (base + (0x555 << 1)) = 0x80;
+			FL_WORD (base + (0x555 << 1)) = 0xAA;
+			FL_WORD (base + (0x2AA << 1)) = 0x55;
+			FL_WORD (addr) = 0x30;
+			if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
+				return ERR_PROTECTED;
+		}
+	}
+	printf ("\nDone.\n");
+	if (ctrlc ())
+		printf ("User Interrupt!\n");
+
+	/* allow flash to settle - wait 10 ms */
+	udelay_masked (10000);
+
+	if (flag)
+		enable_interrupts ();
+
+	return rc;
+}
+
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash
+ */
+
+static int write_word (flash_info_t * info, ulong dest, ushort data)
+{
+	int flag;
+	unsigned long base;
+
+	/* Check if Flash is (sufficiently) erased
+	 */
+	if ((FL_WORD (dest) & data) != data)
+		return ERR_NOT_ERASED;
+
+	/*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */
+
+	/*
+	 * Disable interrupts which might cause a timeout
+	 * here. Remember that our exception vectors are
+	 * at address 0 in the flash, and we don't want a
+	 * (ticker) exception to happen while the flash
+	 * chip is in programming mode.
+	 */
+	flag = disable_interrupts ();
+
+	/* arm simple, non interrupt dependent timer */
+	reset_timer_masked ();
+
+	base = dest & 0xF0000000;
+	FL_WORD (base + (0x555 << 1)) = 0xAA;
+	FL_WORD (base + (0x2AA << 1)) = 0x55;
+	FL_WORD (base + (0x555 << 1)) = 0xA0;
+	FL_WORD (dest) = data;
+	/*printf("writing 0x%p = 0x%x\n",dest,data); */
+	if (flash_status_wait (dest, data) != data)
+		return ERR_PROG_ERROR;
+
+	if (flag)
+		enable_interrupts ();
+
+	return ERR_OK;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong cp, wp;
+	ushort data;
+	int l;
+	int i, rc;
+
+	wp = (addr & ~1);	/* get lower word aligned address */
+	printf ("Writing %d short data to 0x%p from 0x%p.\n ", cnt, wp, src);
+
+	/*
+	 * 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 << 8);
+		}
+		for (; i < 2 && cnt > 0; ++i) {
+			data = (data >> 8) | (*src++ << 8);
+			--cnt;
+			++cp;
+		}
+		for (; cnt == 0 && i < 2; ++i, ++cp) {
+			data = (data >> 8) | (*(uchar *) cp << 8);
+		}
+
+		if ((rc = write_word (info, wp, data)) != 0) {
+			return (rc);
+		}
+		wp += 2;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	while (cnt >= 2) {
+		data = *((vu_short *) src);
+		if ((rc = write_word (info, wp, data)) != 0) {
+			return (rc);
+		}
+		src += 2;
+		wp += 2;
+		cnt -= 2;
+	}
+
+	if (cnt == 0) {
+		printf ("\nDone.\n");
+		return ERR_OK;
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
+		data = (data >> 8) | (*src++ << 8);
+		--cnt;
+	}
+	for (; i < 2; ++i, ++cp) {
+		data = (data >> 8) | (*(uchar *) cp << 8);
+	}
+
+	return write_word (info, wp, data);
+}