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>

1 files changed, 18 insertions, 4 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;
                 }