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-rw-r--r--drivers/mtd/onenand/omap2.c22
-rw-r--r--drivers/mtd/onenand/onenand_base.c173
-rw-r--r--include/linux/mtd/flashchip.h4
-rw-r--r--include/linux/mtd/onenand_regs.h2
4 files changed, 194 insertions, 7 deletions
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index 0108ed42e877..2dafd0949be5 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -112,10 +112,24 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state)
unsigned long timeout;
u32 syscfg;
- if (state == FL_RESETING) {
- int i;
+ if (state == FL_RESETING || state == FL_PREPARING_ERASE ||
+ state == FL_VERIFYING_ERASE) {
+ int i = 21;
+ unsigned int intr_flags = ONENAND_INT_MASTER;
+
+ switch (state) {
+ case FL_RESETING:
+ intr_flags |= ONENAND_INT_RESET;
+ break;
+ case FL_PREPARING_ERASE:
+ intr_flags |= ONENAND_INT_ERASE;
+ break;
+ case FL_VERIFYING_ERASE:
+ i = 101;
+ break;
+ }
- for (i = 0; i < 20; i++) {
+ while (--i) {
udelay(1);
intr = read_reg(c, ONENAND_REG_INTERRUPT);
if (intr & ONENAND_INT_MASTER)
@@ -126,7 +140,7 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state)
wait_err("controller error", state, ctrl, intr);
return -EIO;
}
- if (!(intr & ONENAND_INT_RESET)) {
+ if ((intr & intr_flags) != intr_flags) {
wait_err("timeout", state, ctrl, intr);
return -EIO;
}
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 894ebadc3e69..266f471901e5 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -34,6 +34,13 @@
#include <asm/io.h>
+/*
+ * Multiblock erase if number of blocks to erase is 2 or more.
+ * Maximum number of blocks for simultaneous erase is 64.
+ */
+#define MB_ERASE_MIN_BLK_COUNT 2
+#define MB_ERASE_MAX_BLK_COUNT 64
+
/* Default Flex-OneNAND boundary and lock respectively */
static int flex_bdry[MAX_DIES * 2] = { -1, 0, -1, 0 };
@@ -353,6 +360,8 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
break;
case ONENAND_CMD_ERASE:
+ case ONENAND_CMD_MULTIBLOCK_ERASE:
+ case ONENAND_CMD_ERASE_VERIFY:
case ONENAND_CMD_BUFFERRAM:
case ONENAND_CMD_OTP_ACCESS:
block = onenand_block(this, addr);
@@ -497,7 +506,7 @@ static int onenand_wait(struct mtd_info *mtd, int state)
if (interrupt & flags)
break;
- if (state != FL_READING)
+ if (state != FL_READING && state != FL_PREPARING_ERASE)
cond_resched();
}
/* To get correct interrupt status in timeout case */
@@ -530,6 +539,18 @@ static int onenand_wait(struct mtd_info *mtd, int state)
return -EIO;
}
+ if (state == FL_PREPARING_ERASE && !(interrupt & ONENAND_INT_ERASE)) {
+ printk(KERN_ERR "%s: mb erase timeout! ctrl=0x%04x intr=0x%04x\n",
+ __func__, ctrl, interrupt);
+ return -EIO;
+ }
+
+ if (!(interrupt & ONENAND_INT_MASTER)) {
+ printk(KERN_ERR "%s: timeout! ctrl=0x%04x intr=0x%04x\n",
+ __func__, ctrl, interrupt);
+ return -EIO;
+ }
+
/* If there's controller error, it's a real error */
if (ctrl & ONENAND_CTRL_ERROR) {
printk(KERN_ERR "%s: controller error = 0x%04x\n",
@@ -2182,6 +2203,148 @@ static int onenand_block_isbad_nolock(struct mtd_info *mtd, loff_t ofs, int allo
return bbm->isbad_bbt(mtd, ofs, allowbbt);
}
+
+static int onenand_multiblock_erase_verify(struct mtd_info *mtd,
+ struct erase_info *instr)
+{
+ struct onenand_chip *this = mtd->priv;
+ loff_t addr = instr->addr;
+ int len = instr->len;
+ unsigned int block_size = (1 << this->erase_shift);
+ int ret = 0;
+
+ while (len) {
+ this->command(mtd, ONENAND_CMD_ERASE_VERIFY, addr, block_size);
+ ret = this->wait(mtd, FL_VERIFYING_ERASE);
+ if (ret) {
+ printk(KERN_ERR "%s: Failed verify, block %d\n",
+ __func__, onenand_block(this, addr));
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = addr;
+ return -1;
+ }
+ len -= block_size;
+ addr += block_size;
+ }
+ return 0;
+}
+
+/**
+ * onenand_multiblock_erase - [Internal] erase block(s) using multiblock erase
+ * @param mtd MTD device structure
+ * @param instr erase instruction
+ * @param region erase region
+ *
+ * Erase one or more blocks up to 64 block at a time
+ */
+static int onenand_multiblock_erase(struct mtd_info *mtd,
+ struct erase_info *instr,
+ unsigned int block_size)
+{
+ struct onenand_chip *this = mtd->priv;
+ loff_t addr = instr->addr;
+ int len = instr->len;
+ int eb_count = 0;
+ int ret = 0;
+ int bdry_block = 0;
+
+ instr->state = MTD_ERASING;
+
+ if (ONENAND_IS_DDP(this)) {
+ loff_t bdry_addr = this->chipsize >> 1;
+ if (addr < bdry_addr && (addr + len) > bdry_addr)
+ bdry_block = bdry_addr >> this->erase_shift;
+ }
+
+ /* Pre-check bbs */
+ while (len) {
+ /* Check if we have a bad block, we do not erase bad blocks */
+ if (onenand_block_isbad_nolock(mtd, addr, 0)) {
+ printk(KERN_WARNING "%s: attempt to erase a bad block "
+ "at addr 0x%012llx\n",
+ __func__, (unsigned long long) addr);
+ instr->state = MTD_ERASE_FAILED;
+ return -EIO;
+ }
+ len -= block_size;
+ addr += block_size;
+ }
+
+ len = instr->len;
+ addr = instr->addr;
+
+ /* loop over 64 eb batches */
+ while (len) {
+ struct erase_info verify_instr = *instr;
+ int max_eb_count = MB_ERASE_MAX_BLK_COUNT;
+
+ verify_instr.addr = addr;
+ verify_instr.len = 0;
+
+ /* do not cross chip boundary */
+ if (bdry_block) {
+ int this_block = (addr >> this->erase_shift);
+
+ if (this_block < bdry_block) {
+ max_eb_count = min(max_eb_count,
+ (bdry_block - this_block));
+ }
+ }
+
+ eb_count = 0;
+
+ while (len > block_size && eb_count < (max_eb_count - 1)) {
+ this->command(mtd, ONENAND_CMD_MULTIBLOCK_ERASE,
+ addr, block_size);
+ onenand_invalidate_bufferram(mtd, addr, block_size);
+
+ ret = this->wait(mtd, FL_PREPARING_ERASE);
+ if (ret) {
+ printk(KERN_ERR "%s: Failed multiblock erase, "
+ "block %d\n", __func__,
+ onenand_block(this, addr));
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
+ return -EIO;
+ }
+
+ len -= block_size;
+ addr += block_size;
+ eb_count++;
+ }
+
+ /* last block of 64-eb series */
+ cond_resched();
+ this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
+ onenand_invalidate_bufferram(mtd, addr, block_size);
+
+ ret = this->wait(mtd, FL_ERASING);
+ /* Check if it is write protected */
+ if (ret) {
+ printk(KERN_ERR "%s: Failed erase, block %d\n",
+ __func__, onenand_block(this, addr));
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
+ return -EIO;
+ }
+
+ len -= block_size;
+ addr += block_size;
+ eb_count++;
+
+ /* verify */
+ verify_instr.len = eb_count * block_size;
+ if (onenand_multiblock_erase_verify(mtd, &verify_instr)) {
+ instr->state = verify_instr.state;
+ instr->fail_addr = verify_instr.fail_addr;
+ return -EIO;
+ }
+
+ }
+ return 0;
+}
+
+
/**
* onenand_block_by_block_erase - [Internal] erase block(s) using regular erase
* @param mtd MTD device structure
@@ -2315,7 +2478,13 @@ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_ERASING);
- ret = onenand_block_by_block_erase(mtd, instr, region, block_size);
+ if (region || instr->len < MB_ERASE_MIN_BLK_COUNT * block_size) {
+ /* region is set for Flex-OneNAND (no mb erase) */
+ ret = onenand_block_by_block_erase(mtd, instr,
+ region, block_size);
+ } else {
+ ret = onenand_multiblock_erase(mtd, instr, block_size);
+ }
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
diff --git a/include/linux/mtd/flashchip.h b/include/linux/mtd/flashchip.h
index f350a4879f75..d0bf422ae374 100644
--- a/include/linux/mtd/flashchip.h
+++ b/include/linux/mtd/flashchip.h
@@ -41,9 +41,11 @@ typedef enum {
/* These 2 come from nand_state_t, which has been unified here */
FL_READING,
FL_CACHEDPRG,
- /* These 2 come from onenand_state_t, which has been unified here */
+ /* These 4 come from onenand_state_t, which has been unified here */
FL_RESETING,
FL_OTPING,
+ FL_PREPARING_ERASE,
+ FL_VERIFYING_ERASE,
FL_UNKNOWN
} flstate_t;
diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h
index acadbf53a69f..cd6f3b431195 100644
--- a/include/linux/mtd/onenand_regs.h
+++ b/include/linux/mtd/onenand_regs.h
@@ -131,6 +131,8 @@
#define ONENAND_CMD_LOCK_TIGHT (0x2C)
#define ONENAND_CMD_UNLOCK_ALL (0x27)
#define ONENAND_CMD_ERASE (0x94)
+#define ONENAND_CMD_MULTIBLOCK_ERASE (0x95)
+#define ONENAND_CMD_ERASE_VERIFY (0x71)
#define ONENAND_CMD_RESET (0xF0)
#define ONENAND_CMD_OTP_ACCESS (0x65)
#define ONENAND_CMD_READID (0x90)
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-26 08:00:04 +0000