Initial revision

1 files changed, 301 insertions, 0 deletions

diff --git a/board/ml2/flash.c b/board/ml2/flash.c
new file mode 100644
index 0000000..77e0931
--- /dev/null
+++ b/board/ml2/flash.c
@@ -0,0 +1,301 @@
+/*
+ * flash.c: Support code for the flash chips on the Xilinx ML2 board
+ *
+ * Copyright 2002 Mind NV
+ *
+ * http://www.mind.be/
+ *
+ * Author : Peter De Schrijver (p2@mind.be)
+ *
+ * This software may be used and distributed according to the terms of
+ * the GNU General Public License (GPL) version 2, incorporated herein by
+ * reference. Drivers based on or derived from this code fall under the GPL
+ * and must retain the authorship, copyright and this license notice. This
+ * file is not a complete program and may only be used when the entire program
+ * is licensed under the GPL.
+ *
+ */
+
+#include <common.h>
+#include <asm/u-boot.h>
+#include <configs/ML2.h>
+
+#define FLASH_BANK_SIZE (64*1024*1024)
+
+flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];
+
+#define SECT_SIZE		(512*1024)
+
+#define CMD_READ_ARRAY	0x00FF00FF00FF00FULL
+#define CMD_IDENTIFY        0x0090009000900090ULL
+#define CMD_ERASE_SETUP     0x0020002000200020ULL
+#define CMD_ERASE_CONFIRM   0x00D000D000D000D0ULL
+#define CMD_PROGRAM     0x0040004000400040ULL
+#define CMD_RESUME      0x00D000D000D000D0ULL
+#define CMD_SUSPEND     0x00B000B000B000B0ULL
+#define CMD_STATUS_READ     0x0070007000700070ULL
+#define CMD_STATUS_RESET    0x0050005000500050ULL
+
+#define BIT_BUSY        0x0080008000800080ULL
+#define BIT_ERASE_SUSPEND   0x004000400400040ULL
+#define BIT_ERASE_ERROR     0x0020002000200020ULL
+#define BIT_PROGRAM_ERROR   0x0010001000100010ULL
+#define BIT_VPP_RANGE_ERROR 0x0008000800080008ULL
+#define BIT_PROGRAM_SUSPEND 0x0004000400040004ULL
+#define BIT_PROTECT_ERROR   0x0002000200020002ULL
+#define BIT_UNDEFINED       0x0001000100010001ULL
+
+#define BIT_SEQUENCE_ERROR  0x0030003000300030ULL
+
+#define BIT_TIMEOUT     0x80000000
+
+
+inline void eieio(void) {
+
+	__asm__ __volatile__ ("eieio" : : : "memory");
+
+}
+
+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 = (INTEL_MANUFACT & FLASH_VENDMASK) |
+								 (INTEL_ID_28F128J3A & 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 = CFG_FLASH_BASE;
+		else
+			panic("configured to many flash banks!\n");
+		for (j = 0; j < flash_info[i].sector_count; j++)
+				flash_info[i].start[j]=flashbase + j * SECT_SIZE;
+
+		size += flash_info[i].size;
+	}
+
+	return size;
+}
+
+void flash_print_info  (flash_info_t *info) {
+
+	int i;
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+		case (INTEL_MANUFACT & FLASH_VENDMASK):
+			printf("Intel: ");
+			break;
+		default:
+			printf("Unknown Vendor ");
+			break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+		case (INTEL_ID_28F128J3A & FLASH_TYPEMASK):
+			printf("4x 28F128J3A (128Mbit)\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");
+}
+
+int flash_error (unsigned long long code) {
+
+	if (code & BIT_TIMEOUT) {
+		printf ("Timeout\n");
+		return ERR_TIMOUT;
+	}
+
+	if (~code & BIT_BUSY) {
+		printf ("Busy\n");
+		return ERR_PROG_ERROR;
+	}
+
+	if (code & BIT_VPP_RANGE_ERROR) {
+		printf ("Vpp range error\n");
+		return ERR_PROG_ERROR;
+	}
+
+	if (code & BIT_PROTECT_ERROR) {
+		printf ("Device protect error\n");
+		return ERR_PROG_ERROR;
+	}
+
+	if (code & BIT_SEQUENCE_ERROR) {
+		printf ("Command seqence error\n");
+		return ERR_PROG_ERROR;
+	}
+
+	if (code & BIT_ERASE_ERROR) {
+		printf ("Block erase error\n");
+		return ERR_PROG_ERROR;
+	}
+
+	if (code & BIT_PROGRAM_ERROR) {
+		printf ("Program error\n");
+		return ERR_PROG_ERROR;
+	}
+
+	if (code & BIT_ERASE_SUSPEND) {
+		printf ("Block erase suspended\n");
+		return ERR_PROG_ERROR;
+	}
+
+	if (code & BIT_PROGRAM_SUSPEND) {
+		printf ("Program suspended\n");
+		return ERR_PROG_ERROR;
+	}
+
+	return ERR_OK;
+
+}
+
+int flash_erase (flash_info_t *info, int s_first, int s_last) {
+
+	int rc = ERR_OK;
+	int sect;
+	unsigned long long result;
+
+	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) != (INTEL_MANUFACT & FLASH_VENDMASK))
+		return ERR_UNKNOWN_FLASH_VENDOR;
+
+	for (sect=s_first; sect<=s_last; ++sect)
+		if (info->protect[sect])
+			return ERR_PROTECTED;
+
+	for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
+		volatile unsigned long long *addr=
+									(unsigned long long *)(info->start[sect]);
+
+		printf("Erasing sector %2d ... ", sect);
+
+		*addr=CMD_STATUS_RESET;
+		eieio();
+		*addr=CMD_ERASE_SETUP;
+		eieio();
+		*addr=CMD_ERASE_CONFIRM;
+		eieio();
+
+		do {
+			result = *addr;
+		} while(~result & BIT_BUSY);
+
+		*addr=CMD_READ_ARRAY;
+
+		if ((rc = flash_error(result)) == ERR_OK)
+			printf("ok.\n");
+		else
+			break;
+	}
+
+	if (ctrlc())
+		printf("User Interrupt!\n");
+
+	return rc;
+}
+
+volatile static int write_word (flash_info_t *info, ulong dest, unsigned long long data) {
+
+	volatile unsigned long long *addr=(unsigned long long *)dest;
+	unsigned long long result;
+	int rc = ERR_OK;
+
+	result=*addr;
+	if ((result & data) != data)
+		return ERR_NOT_ERASED;
+
+	*addr=CMD_STATUS_RESET;
+	eieio();
+	*addr=CMD_PROGRAM;
+	eieio();
+	*addr=data;
+	eieio();
+
+	do {
+		result=*addr;
+	} while(~result & BIT_BUSY);
+
+	*addr=CMD_READ_ARRAY;
+
+	rc = flash_error(result);
+
+	return rc;
+
+}
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) {
+
+	ulong cp, wp;
+	unsigned long long data;
+	int l;
+	int i,rc;
+
+	wp=(addr & ~7);
+
+	if((l=addr-wp) != 0) {
+		data=0;
+		for(i=0,cp=wp;i<l;++i,++cp)
+			data = (data >> 8) | (*(uchar *)cp << 24);
+
+		for (; i<8 && cnt>0; ++i) {
+			data = (data >> 8) | (*src++ << 24);
+			--cnt;
+			++cp;
+		}
+
+		for (; i<8; ++i, ++cp)
+			data = (data >> 8) | (*(uchar *)cp << 24);
+
+		if ((rc = write_word(info, wp, data)) != 0)
+			return rc;
+
+		wp+=8;
+	}
+
+	while(cnt>=8) {
+		data=*((unsigned long long *)src);
+		if ((rc = write_word(info, wp, data)) != 0)
+			return rc;
+		src+=8;
+		wp+=8;
+		cnt-=8;
+	}
+
+	if(cnt == 0)
+		return ERR_OK;
+
+	data = 0;
+	for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) {
+		data = (data >> 8) | (*src++ << 24);
+		--cnt;
+	}
+	for (; i<8; ++i, ++cp) {
+		data = (data >> 8) | (*(uchar *)cp << 24);
+	}
+
+	return write_word(info, wp, data);
+
+}
+