mtd: OneNAND: multiblock erase support
Add support for multiblock erase command. OneNANDs (excluding Flex-OneNAND)
are capable of simultaneous erase of up to 64 eraseblocks which is much faster.
This changes the erase requests for regions covering multiple eraseblocks
to be performed using multiblock erase.
Signed-off-by: Mika Korhonen <ext-mika.2.korhonen@nokia.com>
Reviewed-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index 0108ed4..2dafd09 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -112,10 +112,24 @@
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;
- for (i = 0; i < 20; i++) {
+ 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;
+ }
+
+ while (--i) {
udelay(1);
intr = read_reg(c, ONENAND_REG_INTERRUPT);
if (intr & ONENAND_INT_MASTER)
@@ -126,7 +140,7 @@
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;
}