示例#1
0
/* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */
static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip)
{
	int mfr, id, i, j;
	volatile char dummy;

	/* Page in the required floor/chip
	   FIXME: is this supported by Millennium ?? */
	DoC_SelectFloor(doc->virtadr, floor);
	DoC_SelectChip(doc->virtadr, chip);

	/* Reset the chip, see Software Requirement 11.4 item 1. */
	DoC_Command(doc->virtadr, NAND_CMD_RESET, CDSN_CTRL_WP);
	DoC_WaitReady(doc->virtadr);

	/* Read the NAND chip ID: 1. Send ReadID command */
	DoC_Command(doc->virtadr, NAND_CMD_READID, CDSN_CTRL_WP);

	/* Read the NAND chip ID: 2. Send address byte zero */
	DoC_Address(doc->virtadr, 1, 0x00, CDSN_CTRL_WP, 0x00);

	/* Read the manufacturer and device id codes of the flash device through
	   CDSN IO register see Software Requirement 11.4 item 5.*/
	dummy = ReadDOC(doc->virtadr, ReadPipeInit);
	DoC_Delay(doc->virtadr, 2);
	mfr = ReadDOC(doc->virtadr, Mil_CDSN_IO);

	DoC_Delay(doc->virtadr, 2);
	id  = ReadDOC(doc->virtadr, Mil_CDSN_IO);
	dummy = ReadDOC(doc->virtadr, LastDataRead);

	/* No response - return failure */
	if (mfr == 0xff || mfr == 0)
		return 0;

	/* FIXME: to deal with multi-flash on multi-Millennium case more carefully */
	for (i = 0; nand_flash_ids[i].name != NULL; i++) {
		if ( id == nand_flash_ids[i].id) {
			/* Try to identify manufacturer */
			for (j = 0; nand_manuf_ids[j].id != 0x0; j++) {
				if (nand_manuf_ids[j].id == mfr)
					break;
			}
			printk(KERN_INFO "Flash chip found: Manufacturer ID: %2.2X, "
			       "Chip ID: %2.2X (%s:%s)\n",
			       mfr, id, nand_manuf_ids[j].name, nand_flash_ids[i].name);
			doc->mfr = mfr;
			doc->id = id;
			doc->chipshift = ffs((nand_flash_ids[i].chipsize << 20)) - 1;
			break;
		}
	}

	if (nand_flash_ids[i].name == NULL)
		return 0;
	else
		return 1;
}
示例#2
0
static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip)
{
	int mfr, id, i, j;
	volatile char dummy;

	
	DoC_SelectFloor(doc->virtadr, floor);
	DoC_SelectChip(doc->virtadr, chip);

	
	DoC_Command(doc->virtadr, NAND_CMD_RESET, CDSN_CTRL_WP);
	DoC_WaitReady(doc->virtadr);

	
	DoC_Command(doc->virtadr, NAND_CMD_READID, CDSN_CTRL_WP);

	
	DoC_Address(doc->virtadr, 1, 0x00, CDSN_CTRL_WP, 0x00);

	
	dummy = ReadDOC(doc->virtadr, ReadPipeInit);
	DoC_Delay(doc->virtadr, 2);
	mfr = ReadDOC(doc->virtadr, Mil_CDSN_IO);

	DoC_Delay(doc->virtadr, 2);
	id  = ReadDOC(doc->virtadr, Mil_CDSN_IO);
	dummy = ReadDOC(doc->virtadr, LastDataRead);

	
	if (mfr == 0xff || mfr == 0)
		return 0;

	
	for (i = 0; nand_flash_ids[i].name != NULL; i++) {
		if ( id == nand_flash_ids[i].id) {
			
			for (j = 0; nand_manuf_ids[j].id != 0x0; j++) {
				if (nand_manuf_ids[j].id == mfr)
					break;
			}
			printk(KERN_INFO "Flash chip found: Manufacturer ID: %2.2X, "
			       "Chip ID: %2.2X (%s:%s)\n",
			       mfr, id, nand_manuf_ids[j].name, nand_flash_ids[i].name);
			doc->mfr = mfr;
			doc->id = id;
			doc->chipshift = ffs((nand_flash_ids[i].chipsize << 20)) - 1;
			break;
		}
	}

	if (nand_flash_ids[i].name == NULL)
		return 0;
	else
		return 1;
}
示例#3
0
/* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */
static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip)
{
	int mfr, id, i, j;
	volatile char dummy;
	void __iomem * docptr = doc->virtadr;

	/* Page in the required floor/chip */
	DoC_SelectFloor(docptr, floor);
	DoC_SelectChip(docptr, chip);

	/* Millennium Plus bus cycle sequence as per figure 2, section 2.4 */
	WriteDOC((DOC_FLASH_CE | DOC_FLASH_WP), docptr, Mplus_FlashSelect);

	/* Reset the chip, see Software Requirement 11.4 item 1. */
	DoC_Command(docptr, NAND_CMD_RESET, 0);
	DoC_WaitReady(docptr);

	/* Read the NAND chip ID: 1. Send ReadID command */
	DoC_Command(docptr, NAND_CMD_READID, 0);

	/* Read the NAND chip ID: 2. Send address byte zero */
	DoC_Address(doc, 1, 0x00, 0, 0x00);

	WriteDOC(0, docptr, Mplus_FlashControl);
	DoC_WaitReady(docptr);

	/* Read the manufacturer and device id codes of the flash device through
	   CDSN IO register see Software Requirement 11.4 item 5.*/
	dummy = ReadDOC(docptr, Mplus_ReadPipeInit);
	dummy = ReadDOC(docptr, Mplus_ReadPipeInit);

	mfr = ReadDOC(docptr, Mil_CDSN_IO);
	if (doc->interleave)
		dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */

	id  = ReadDOC(docptr, Mil_CDSN_IO);
	if (doc->interleave)
		dummy = ReadDOC(docptr, Mil_CDSN_IO); /* 2 way interleave */

	dummy = ReadDOC(docptr, Mplus_LastDataRead);
	dummy = ReadDOC(docptr, Mplus_LastDataRead);

	/* Disable flash internally */
	WriteDOC(0, docptr, Mplus_FlashSelect);

	/* No response - return failure */
	if (mfr == 0xff || mfr == 0)
		return 0;

	for (i = 0; nand_flash_ids[i].name != NULL; i++) {
		if (id == nand_flash_ids[i].id) {
			/* Try to identify manufacturer */
			for (j = 0; nand_manuf_ids[j].id != 0x0; j++) {
				if (nand_manuf_ids[j].id == mfr)
					break;
			}
			printk(KERN_INFO "Flash chip found: Manufacturer ID: %2.2X, "
			       "Chip ID: %2.2X (%s:%s)\n", mfr, id,
			       nand_manuf_ids[j].name, nand_flash_ids[i].name);
			doc->mfr = mfr;
			doc->id = id;
			doc->chipshift = ffs((nand_flash_ids[i].chipsize << 20)) - 1;
			doc->erasesize = nand_flash_ids[i].erasesize << doc->interleave;
			break;
		}
	}

	if (nand_flash_ids[i].name == NULL)
		return 0;
	return 1;
}