summaryrefslogtreecommitdiffstats
path: root/drivers/mtd
diff options
context:
space:
mode:
authorKyungmin Park <kyungmin.park@samsung.com>2006-09-26 09:45:28 +0000
committerDavid Woodhouse <dwmw2@infradead.org>2006-09-26 16:46:28 +0100
commit28b79ff9661b22e4c41c0d00d4ab8503e810f13d (patch)
tree4c5bc7711b52ec2ca569d8250de09b8b5b82fb7a /drivers/mtd
parent98638ee2edf86b80cf89486c4aabcd9ce471a54a (diff)
downloadop-kernel-dev-28b79ff9661b22e4c41c0d00d4ab8503e810f13d.zip
op-kernel-dev-28b79ff9661b22e4c41c0d00d4ab8503e810f13d.tar.gz
[MTD ONENAND] Check OneNAND lock scheme & all block unlock command support
OneNAND lock scheme depends on density and process of chip. Some OneNAND chips support all block unlock Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/onenand/onenand_base.c137
1 files changed, 118 insertions, 19 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 09aefe2..8ed68b2 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -1,7 +1,7 @@
/*
* linux/drivers/mtd/onenand/onenand_base.c
*
- * Copyright (C) 2005 Samsung Electronics
+ * Copyright (C) 2005-2006 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
@@ -199,6 +199,7 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
case ONENAND_CMD_UNLOCK:
case ONENAND_CMD_LOCK:
case ONENAND_CMD_LOCK_TIGHT:
+ case ONENAND_CMD_UNLOCK_ALL:
block = -1;
page = -1;
break;
@@ -1211,11 +1212,11 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
end = len >> this->erase_shift;
/* Continuous lock scheme */
- if (this->options & ONENAND_CONT_LOCK) {
+ if (this->options & ONENAND_HAS_CONT_LOCK) {
/* Set start block address */
this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
/* Set end block address */
- this->write_word(end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
+ this->write_word(start + end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
/* Write unlock command */
this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
@@ -1236,7 +1237,7 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
}
/* Block lock scheme */
- for (block = start; block < end; block++) {
+ for (block = start; block < start + end; block++) {
/* Set block address */
value = onenand_block_address(this, block);
this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
@@ -1265,6 +1266,79 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
return 0;
}
+/**
+ * onenand_check_lock_status - [OneNAND Interface] Check lock status
+ * @param this onenand chip data structure
+ *
+ * Check lock status
+ */
+static void onenand_check_lock_status(struct onenand_chip *this)
+{
+ unsigned int value, block, status;
+ unsigned int end;
+
+ end = this->chipsize >> this->erase_shift;
+ for (block = 0; block < end; block++) {
+ /* Set block address */
+ value = onenand_block_address(this, block);
+ this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
+ /* Select DataRAM for DDP */
+ value = onenand_bufferram_address(this, block);
+ this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
+ /* Set start block address */
+ this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
+
+ /* Check lock status */
+ status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
+ if (!(status & ONENAND_WP_US))
+ printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
+ }
+}
+
+/**
+ * onenand_unlock_all - [OneNAND Interface] unlock all blocks
+ * @param mtd MTD device structure
+ *
+ * Unlock all blocks
+ */
+static int onenand_unlock_all(struct mtd_info *mtd)
+{
+ struct onenand_chip *this = mtd->priv;
+
+ if (this->options & ONENAND_HAS_UNLOCK_ALL) {
+ /* Write unlock command */
+ this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
+
+ /* There's no return value */
+ this->wait(mtd, FL_UNLOCKING);
+
+ /* Sanity check */
+ while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
+ & ONENAND_CTRL_ONGO)
+ continue;
+
+ /* Workaround for all block unlock in DDP */
+ if (this->device_id & ONENAND_DEVICE_IS_DDP) {
+ loff_t ofs;
+ size_t len;
+
+ /* 1st block on another chip */
+ ofs = this->chipsize >> 1;
+ len = 1 << this->erase_shift;
+
+ onenand_unlock(mtd, ofs, len);
+ }
+
+ onenand_check_lock_status(this);
+
+ return 0;
+ }
+
+ mtd->unlock(mtd, 0x0, this->chipsize);
+
+ return 0;
+}
+
#ifdef CONFIG_MTD_ONENAND_OTP
/* Interal OTP operation */
@@ -1564,12 +1638,43 @@ static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
#endif /* CONFIG_MTD_ONENAND_OTP */
/**
+ * onenand_lock_scheme - Check and set OneNAND lock scheme
+ * @param mtd MTD data structure
+ *
+ * Check and set OneNAND lock scheme
+ */
+static void onenand_lock_scheme(struct mtd_info *mtd)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned int density, process;
+
+ /* Lock scheme depends on density and process */
+ density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+ process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
+
+ /* Lock scheme */
+ if (density >= ONENAND_DEVICE_DENSITY_1Gb) {
+ /* A-Die has all block unlock */
+ if (process) {
+ printk(KERN_DEBUG "Chip support all block unlock\n");
+ this->options |= ONENAND_HAS_UNLOCK_ALL;
+ }
+ } else {
+ /* Some OneNAND has continues lock scheme */
+ if (!process) {
+ printk(KERN_DEBUG "Lock scheme is Continues Lock\n");
+ this->options |= ONENAND_HAS_CONT_LOCK;
+ }
+ }
+}
+
+/**
* onenand_print_device_info - Print device ID
* @param device device ID
*
* Print device ID
*/
-static void onenand_print_device_info(int device)
+static void onenand_print_device_info(int device, int version)
{
int vcc, demuxed, ddp, density;
@@ -1583,6 +1688,7 @@ static void onenand_print_device_info(int device)
(16 << density),
vcc ? "2.65/3.3" : "1.8",
device);
+ printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version);
}
static const struct onenand_manufacturers onenand_manuf_ids[] = {
@@ -1625,8 +1731,7 @@ static int onenand_check_maf(int manuf)
static int onenand_probe(struct mtd_info *mtd)
{
struct onenand_chip *this = mtd->priv;
- int bram_maf_id, bram_dev_id, maf_id, dev_id;
- int version_id;
+ int bram_maf_id, bram_dev_id, maf_id, dev_id, ver_id;
int density;
int syscfg;
@@ -1657,14 +1762,16 @@ static int onenand_probe(struct mtd_info *mtd)
/* Read manufacturer and device IDs from Register */
maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
+ ver_id= this->read_word(this->base + ONENAND_REG_VERSION_ID);
/* Check OneNAND device */
if (maf_id != bram_maf_id || dev_id != bram_dev_id)
return -ENXIO;
/* Flash device information */
- onenand_print_device_info(dev_id);
+ onenand_print_device_info(dev_id, ver_id);
this->device_id = dev_id;
+ this->version_id = ver_id;
density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
this->chipsize = (16 << density) << 20;
@@ -1687,16 +1794,8 @@ static int onenand_probe(struct mtd_info *mtd)
mtd->size = this->chipsize;
- /* Version ID */
- version_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
- printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version_id);
-
- /* Lock scheme */
- if (density <= ONENAND_DEVICE_DENSITY_512Mb &&
- !(version_id >> ONENAND_VERSION_PROCESS_SHIFT)) {
- printk(KERN_INFO "Lock scheme is Continues Lock\n");
- this->options |= ONENAND_CONT_LOCK;
- }
+ /* Check OneNAND lock scheme */
+ onenand_lock_scheme(mtd);
return 0;
}
@@ -1832,7 +1931,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
mtd->owner = THIS_MODULE;
/* Unlock whole block */
- mtd->unlock(mtd, 0x0, this->chipsize);
+ onenand_unlock_all(mtd);
return this->scan_bbt(mtd);
}
OpenPOWER on IntegriCloud