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>

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 32f0ed3..1b26f50 100644 (file)
--- 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;

diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h
index 5509eb0..c9a3c35 100644 (file)
--- a/include/linux/mtd/onenand.h
+++ b/include/linux/mtd/onenand.h
@@ -175,10 +175,14 @@ struct onenand_chip {
 #define ONENAND_HAS_CONT_LOCK          (0x0001)
 #define ONENAND_HAS_UNLOCK_ALL         (0x0002)
 #define ONENAND_HAS_2PLANE             (0x0004)
+#define ONENAND_HAS_4KB_PAGE           (0x0008)
 #define ONENAND_SKIP_UNLOCK_CHECK      (0x0100)
 #define ONENAND_PAGEBUF_ALLOC          (0x1000)
 #define ONENAND_OOBBUF_ALLOC           (0x2000)
 
+#define ONENAND_IS_4KB_PAGE(this)                                      \
+       (this->options & ONENAND_HAS_4KB_PAGE)
+
 /*
  * OneNAND Flash Manufacturer ID Codes
  */