1 files changed, 322 insertions, 0 deletions
diff --git a/board/mx1ads/syncflash.c b/board/mx1ads/syncflash.c
new file mode 100755
index 0000000..eb7fde5
--- /dev/null
+++ b/board/mx1ads/syncflash.c
@@ -0,0 +1,322 @@
+/*
+ * board/mx1ads/syncflash.c
+ *
+ * (c) Copyright 2004
+ * Techware Information Technology, Inc.
+ * http://www.techware.com.tw/
+ *
+ * Ming-Len Wu <minglen_wu@techware.com.tw>
+ *
+ * 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 <mc9328.h>*/
+#include <asm/arch/imx-regs.h>
+
+typedef unsigned long * p_u32;
+
+/* 4Mx16x2 IAM=0 CSD1 */
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips    */
+
+/*  Following Setting is for CSD1	*/
+#define SFCTL			0x00221004
+#define reg_SFCTL		__REG(SFCTL)
+
+#define SYNCFLASH_A10		(0x00100000)
+
+#define CMD_NORMAL		(0x81020300)			/* Normal Mode			*/
+#define CMD_PREC		(CMD_NORMAL + 0x10000000) 	/* Precharge Command		*/
+#define CMD_AUTO		(CMD_NORMAL + 0x20000000) 	/* Auto Refresh Command		*/
+#define CMD_LMR			(CMD_NORMAL + 0x30000000) 	/* Load Mode Register Command 	*/
+#define CMD_LCR			(CMD_NORMAL + 0x60000000) 	/* LCR Command			*/
+#define CMD_PROGRAM		(CMD_NORMAL + 0x70000000)
+
+#define MODE_REG_VAL		(CFG_FLASH_BASE+0x0008CC00) 	/* Cas Latency 3		*/
+
+/* LCR Command */
+#define LCR_READSTATUS		(0x0001C000)			/* 0x70				*/
+#define LCR_ERASE_CONFIRM	(0x00008000)			/* 0x20				*/
+#define LCR_ERASE_NVMODE	(0x0000C000)			/* 0x30				*/
+#define LCR_PROG_NVMODE		(0x00028000)			/* 0xA0				*/
+#define LCR_SR_CLEAR		(0x00014000)			/* 0x50				*/
+
+/* Get Status register 			*/
+u32 SF_SR(void) {
+	u32 tmp,tmp1;
+
+	reg_SFCTL	= CMD_PROGRAM;
+	tmp 		= __REG(CFG_FLASH_BASE);
+
+	reg_SFCTL	= CMD_NORMAL;
+
+	reg_SFCTL	= CMD_LCR;			/* Activate LCR Mode 		*/
+	tmp1 		= __REG(CFG_FLASH_BASE + LCR_SR_CLEAR);
+
+	return tmp;
+}
+
+/* check if SyncFlash is ready 		*/
+u8 SF_Ready(void) {
+	u32 tmp;
+
+	tmp	= SF_SR();
+
+	if ((tmp & 0x00800000) && (tmp & 0x001C0000)) {
+		printf ("SyncFlash Error code %08x\n",tmp);
+	};
+
+	if ((tmp & 0x00000080) && (tmp & 0x0000001C)) {
+		printf ("SyncFlash Error code %08x\n",tmp);
+	};
+
+	if (tmp == 0x00800080) 		/* Test Bit 7 of SR	*/
+		return 1;
+	else
+		return 0;
+}
+
+/* Issue the precharge all command 		*/
+void SF_PrechargeAll(void) {
+
+	u32 tmp;
+
+	reg_SFCTL	= CMD_PREC;			/* Set Precharge Command 	*/
+	tmp 		= __REG(CFG_FLASH_BASE + SYNCFLASH_A10); /* Issue Precharge All Command */
+}
+
+/* set SyncFlash to normal mode			*/
+void SF_Normal(void) {
+
+	SF_PrechargeAll();
+
+	reg_SFCTL	= CMD_NORMAL;
+}
+
+/* Erase SyncFlash 				*/
+void SF_Erase(u32 RowAddress) {
+	u32 tmp;
+
+	reg_SFCTL	= CMD_NORMAL;
+	tmp 		= __REG(RowAddress);
+
+	reg_SFCTL	= CMD_PREC;
+	tmp 		= __REG(RowAddress);
+
+	reg_SFCTL 	= CMD_LCR;			/* Set LCR mode 		*/
+	__REG(RowAddress + LCR_ERASE_CONFIRM)	= 0;	/* Issue Erase Setup Command 	*/
+
+	reg_SFCTL	= CMD_NORMAL;			/* return to Normal mode 	*/
+	__REG(RowAddress)	= 0xD0D0D0D0; 		/* Confirm			*/
+
+	while(!SF_Ready());
+}
+
+void SF_NvmodeErase(void) {
+	SF_PrechargeAll();
+
+	reg_SFCTL	= CMD_LCR;			/* Set to LCR mode		*/
+	__REG(CFG_FLASH_BASE + LCR_ERASE_NVMODE)  = 0;	/* Issue Erase Nvmode Reg Command */
+
+	reg_SFCTL	= CMD_NORMAL;			/* Return to Normal mode 	*/
+	__REG(CFG_FLASH_BASE + LCR_ERASE_NVMODE) = 0xC0C0C0C0;	/* Confirm 		*/
+
+	while(!SF_Ready());
+}
+
+void SF_NvmodeWrite(void) {
+	SF_PrechargeAll();
+
+	reg_SFCTL 	= CMD_LCR;			/* Set to LCR mode 		*/
+	__REG(CFG_FLASH_BASE+LCR_PROG_NVMODE) = 0;	/* Issue Program Nvmode reg command */
+
+	reg_SFCTL	= CMD_NORMAL;			/* Return to Normal mode 	*/
+	__REG(CFG_FLASH_BASE+LCR_PROG_NVMODE) = 0xC0C0C0C0; 	/* Confirm not needed 	*/
+}
+
+/****************************************************************************************/
+
+ulong flash_init(void) {
+	int i, j;
+	u32 tmp;
+
+/* Turn on CSD1 for negating RESETSF of SyncFLash */
+
+	reg_SFCTL 	|= 0x80000000;		/* enable CSD1 for SyncFlash 		*/
+	udelay(200);
+
+	reg_SFCTL 	= CMD_LMR;		/* Set Load Mode Register Command 	*/
+	tmp 		= __REG(MODE_REG_VAL);	/* Issue Load Mode Register Command 	*/
+
+	SF_Normal();
+
+	i = 0;
+
+	flash_info[i].flash_id 	=  FLASH_MAN_MT | FLASH_MT28S4M16LC;
+
+	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);
+
+	for (j = 0; j < flash_info[i].sector_count; j++) {
+		flash_info[i].start[j] = CFG_FLASH_BASE + j * 0x00100000;
+	}
+
+	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 FLASH_BANK_SIZE;
+}
+
+void flash_print_info (flash_info_t *info) {
+
+	int i;
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+		case (FLASH_MAN_MT & FLASH_VENDMASK):
+			printf("Micron: ");
+			break;
+		default:
+			printf("Unknown Vendor ");
+			break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+		case (FLASH_MT28S4M16LC & FLASH_TYPEMASK):
+			printf("2x FLASH_MT28S4M16LC (16MB Total)\n");
+			break;
+		default:
+			printf("Unknown Chip Type\n");
+			return;
+			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");
+}
+
+/*-----------------------------------------------------------------------*/
+
+int flash_erase (flash_info_t *info, int s_first, int s_last) {
+	int iflag, cflag, prot, sect;
+	int rc = ERR_OK;
+
+/* first look for protection bits */
+
+	if (info->flash_id == FLASH_UNKNOWN)
+		return ERR_UNKNOWN_FLASH_TYPE;
+
+	if ((s_first < 0) || (s_first > s_last))
+		return ERR_INVAL;
+
+	if ((info->flash_id & FLASH_VENDMASK) != (FLASH_MAN_MT & FLASH_VENDMASK))
+		return ERR_UNKNOWN_FLASH_VENDOR;
+
+	prot = 0;
+
+	for (sect = s_first; sect <= s_last; ++sect) {
+		if (info->protect[sect])
+			prot++;
+	}
+
+	if (prot) {
+		printf("protected!\n");
+		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.
+ */
+
+	cflag = icache_status();
+	icache_disable();
+	iflag = disable_interrupts();
+
+/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last && !ctrlc(); sect++) {
+
+		printf("Erasing sector %2d ... ", sect);
+
+/* arm simple, non interrupt dependent timer */
+
+		reset_timer_masked();
+
+		SF_NvmodeErase();
+		SF_NvmodeWrite();
+
+		SF_Erase(CFG_FLASH_BASE + (0x0100000 * sect));
+		SF_Normal();
+
+		printf("ok.\n");
+	}
+
+	if (ctrlc())
+		printf("User Interrupt!\n");
+
+	if (iflag)
+		enable_interrupts();
+
+	if (cflag)
+		icache_enable();
+
+	return rc;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash.
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) {
+	int i;
+
+	for(i = 0; i < cnt; i += 4) {
+
+		SF_PrechargeAll();
+
+		reg_SFCTL	= CMD_PROGRAM;		/* Enter SyncFlash Program mode */
+		__REG(addr + i) = __REG((u32)src  + i);
+
+		while(!SF_Ready());
+	}
+
+	SF_Normal();
+
+	return ERR_OK;
+}