mtd: onenand: add support for chips with 4KiB page size

This patch adds support for OneNAND chips that have 4KiB page size.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 19 insertions, 13 deletions

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 32f0ed33afe0..1b26f50e159a 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -397,7 +397,8 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
                 value = onenand_bufferram_address(this, block);
                 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
 
-                if (ONENAND_IS_MLC(this) || ONENAND_IS_2PLANE(this))
+                if (ONENAND_IS_MLC(this) || ONENAND_IS_2PLANE(this) ||
+                    ONENAND_IS_4KB_PAGE(this))
                         /* It is always BufferRAM0 */
                         ONENAND_SET_BUFFERRAM0(this);
                 else
@@ -426,7 +427,7 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
                 case FLEXONENAND_CMD_RECOVER_LSB:
                 case ONENAND_CMD_READ:
                 case ONENAND_CMD_READOOB:
-                        if (ONENAND_IS_MLC(this))
+                        if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this))
                                 /* It is always BufferRAM0 */
                                 dataram = ONENAND_SET_BUFFERRAM0(this);
                         else
@@ -466,11 +467,11 @@ static inline int onenand_read_ecc(struct onenand_chip *this)
 {
         int ecc, i, result = 0;
 
-        if (!FLEXONENAND(this))
+        if (!FLEXONENAND(this) && !ONENAND_IS_4KB_PAGE(this))
                 return this->read_word(this->base + ONENAND_REG_ECC_STATUS);
 
         for (i = 0; i < 4; i++) {
-                ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS + i);
+                ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS + i*2);
                 if (likely(!ecc))
                         continue;
                 if (ecc & FLEXONENAND_UNCORRECTABLE_ERROR)
@@ -1425,7 +1426,7 @@ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
         int ret;
 
         onenand_get_device(mtd, FL_READING);
-        ret = ONENAND_IS_MLC(this) ?
+        ret = ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this) ?
                 onenand_mlc_read_ops_nolock(mtd, from, &ops) :
                 onenand_read_ops_nolock(mtd, from, &ops);
         onenand_release_device(mtd);
@@ -1460,7 +1461,7 @@ static int onenand_read_oob(struct mtd_info *mtd, loff_t from,
 
         onenand_get_device(mtd, FL_READING);
         if (ops->datbuf)
-                ret = ONENAND_IS_MLC(this) ?
+                ret = ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this) ?
                         onenand_mlc_read_ops_nolock(mtd, from, ops) :
                         onenand_read_ops_nolock(mtd, from, ops);
         else
@@ -1926,7 +1927,7 @@ static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
                  * 2 PLANE, MLC, and Flex-OneNAND do not support
                  * write-while-program feature.
                  */
-                if (!ONENAND_IS_2PLANE(this) && !first) {
+                if (!ONENAND_IS_2PLANE(this) && !ONENAND_IS_4KB_PAGE(this) && !first) {
                         ONENAND_SET_PREV_BUFFERRAM(this);
 
                         ret = this->wait(mtd, FL_WRITING);
@@ -1957,7 +1958,7 @@ static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
                 /*
                  * 2 PLANE, MLC, and Flex-OneNAND wait here
                  */
-                if (ONENAND_IS_2PLANE(this)) {
+                if (ONENAND_IS_2PLANE(this) || ONENAND_IS_4KB_PAGE(this)) {
                         ret = this->wait(mtd, FL_WRITING);
 
                         /* In partial page write we don't update bufferram */
@@ -2084,7 +2085,7 @@ static int onenand_write_oob_nolock(struct mtd_info *mtd, loff_t to,
                         memcpy(oobbuf + column, buf, thislen);
                 this->write_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
 
-                if (ONENAND_IS_MLC(this)) {
+                if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this)) {
                         /* Set main area of DataRAM to 0xff*/
                         memset(this->page_buf, 0xff, mtd->writesize);
                         this->write_bufferram(mtd, ONENAND_DATARAM,
@@ -3027,7 +3028,7 @@ static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len,
         this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
         this->wait(mtd, FL_OTPING);
 
-        ret = ONENAND_IS_MLC(this) ?
+        ret = ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this) ?
                 onenand_mlc_read_ops_nolock(mtd, from, &ops) :
                 onenand_read_ops_nolock(mtd, from, &ops);
 
@@ -3372,7 +3373,10 @@ static void onenand_check_features(struct mtd_info *mtd)
         /* Lock scheme */
         switch (density) {
         case ONENAND_DEVICE_DENSITY_4Gb:
-                this->options |= ONENAND_HAS_2PLANE;
+                if (ONENAND_IS_DDP(this))
+                        this->options |= ONENAND_HAS_2PLANE;
+                else
+                        this->options |= ONENAND_HAS_4KB_PAGE;
 
         case ONENAND_DEVICE_DENSITY_2Gb:
                 /* 2Gb DDP does not have 2 plane */
@@ -3393,7 +3397,7 @@ static void onenand_check_features(struct mtd_info *mtd)
                 break;
         }
 
-        if (ONENAND_IS_MLC(this))
+        if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this))
                 this->options &= ~ONENAND_HAS_2PLANE;
 
         if (FLEXONENAND(this)) {
@@ -3407,6 +3411,8 @@ static void onenand_check_features(struct mtd_info *mtd)
                 printk(KERN_DEBUG "Chip support all block unlock\n");
         if (this->options & ONENAND_HAS_2PLANE)
                 printk(KERN_DEBUG "Chip has 2 plane\n");
+        if (this->options & ONENAND_HAS_4KB_PAGE)
+                printk(KERN_DEBUG "Chip has 4KiB pagesize\n");
 }
 
 /**
@@ -3799,7 +3805,7 @@ static int onenand_probe(struct mtd_info *mtd)
         /* The data buffer size is equal to page size */
         mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
         /* We use the full BufferRAM */
-        if (ONENAND_IS_MLC(this))
+        if (ONENAND_IS_MLC(this) || ONENAND_IS_4KB_PAGE(this))
                 mtd->writesize <<= 1;
 
         mtd->oobsize = mtd->writesize >> 5;