/* 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;
}
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;
}
/* 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;
}
