Merge git://git.infradead.org/~kmpark/onenand-mtd-2.6

2 files changed, 29 insertions, 31 deletions

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index ed9f9c061ac5..b281b116aaeb 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -170,6 +170,18 @@ static int onenand_buffer_address(int dataram1, int sectors, int count)
 }
 
 /**
+ * onenand_get_density - [DEFAULT] Get OneNAND density
+ * @param dev_id        OneNAND device ID
+ *
+ * Get OneNAND density from device ID
+ */
+static inline int onenand_get_density(int dev_id)
+{
+        int density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+        return (density & ONENAND_DEVICE_DENSITY_MASK);
+}
+
+/**
  * onenand_command - [DEFAULT] Send command to OneNAND device
  * @param mtd           MTD device structure
  * @param cmd           the command to be sent
@@ -182,8 +194,7 @@ static int onenand_buffer_address(int dataram1, int sectors, int count)
 static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len)
 {
         struct onenand_chip *this = mtd->priv;
-        int value, readcmd = 0, block_cmd = 0;
-        int block, page;
+        int value, block, page;
 
         /* Address translation */
         switch (cmd) {
@@ -198,7 +209,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
         case ONENAND_CMD_ERASE:
         case ONENAND_CMD_BUFFERRAM:
         case ONENAND_CMD_OTP_ACCESS:
-                block_cmd = 1;
                 block = (int) (addr >> this->erase_shift);
                 page = -1;
                 break;
@@ -240,11 +250,9 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
                 value = onenand_block_address(this, block);
                 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
 
-                if (block_cmd) {
-                        /* Select DataRAM for DDP */
-                        value = onenand_bufferram_address(this, block);
-                        this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
-                }
+                /* Select DataRAM for DDP */
+                value = onenand_bufferram_address(this, block);
+                this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
         }
 
         if (page != -1) {
@@ -256,7 +264,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
                 case ONENAND_CMD_READ:
                 case ONENAND_CMD_READOOB:
                         dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
-                        readcmd = 1;
                         break;
 
                 default:
@@ -273,12 +280,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le
                 /* Write 'BSA, BSC' of DataRAM */
                 value = onenand_buffer_address(dataram, sectors, count);
                 this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
-
-                if (readcmd) {
-                        /* Select DataRAM for DDP */
-                        value = onenand_bufferram_address(this, block);
-                        this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
-                }
         }
 
         /* Interrupt clear */
@@ -1118,12 +1119,10 @@ static int onenand_bbt_wait(struct mtd_info *mtd, int state)
         interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
         ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
 
+        /* Initial bad block case: 0x2400 or 0x0400 */
         if (ctrl & ONENAND_CTRL_ERROR) {
                 printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl);
-                /* Initial bad block case */
-                if (ctrl & ONENAND_CTRL_LOAD)
-                        return ONENAND_BBT_READ_ERROR;
-                return ONENAND_BBT_READ_FATAL_ERROR;
+                return ONENAND_BBT_READ_ERROR;
         }
 
         if (interrupt & ONENAND_INT_READ) {
@@ -1218,7 +1217,7 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to)
 {
         struct onenand_chip *this = mtd->priv;
-        char oobbuf[64];
+        u_char *oob_buf = this->oob_buf;
         int status, i;
 
         this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize);
@@ -1227,9 +1226,9 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to
         if (status)
                 return status;
 
-        this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize);
+        this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize);
         for (i = 0; i < mtd->oobsize; i++)
-                if (buf[i] != 0xFF && buf[i] != oobbuf[i])
+                if (buf[i] != 0xFF && buf[i] != oob_buf[i])
                         return -EBADMSG;
 
         return 0;
@@ -1431,7 +1430,7 @@ static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
                 }
 
                 /* Only check verify write turn on */
-                ret = onenand_verify(mtd, (u_char *) wbuf, to, thislen);
+                ret = onenand_verify(mtd, buf, to, thislen);
                 if (ret) {
                         printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret);
                         break;
@@ -1447,9 +1446,6 @@ static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to,
                 buf += thislen;
         }
 
-        /* Deselect and wake up anyone waiting on the device */
-        onenand_release_device(mtd);
-
         ops->retlen = written;
 
         return ret;
@@ -2160,7 +2156,7 @@ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len,
 
         *retlen = 0;
 
-        density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+        density = onenand_get_density(this->device_id);
         if (density < ONENAND_DEVICE_DENSITY_512Mb)
                 otp_pages = 20;
         else
@@ -2311,7 +2307,8 @@ static int onenand_write_user_prot_reg(struct mtd_info *mtd, loff_t from,
 static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
                         size_t len)
 {
-        unsigned char oob_buf[64];
+        struct onenand_chip *this = mtd->priv;
+        u_char *oob_buf = this->oob_buf;
         size_t retlen;
         int ret;
 
@@ -2351,7 +2348,7 @@ static void onenand_check_features(struct mtd_info *mtd)
         unsigned int density, process;
 
         /* Lock scheme depends on density and process */
-        density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+        density = onenand_get_density(this->device_id);
         process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT;
 
         /* Lock scheme */
@@ -2400,7 +2397,7 @@ static void onenand_print_device_info(int device, int version)
         vcc = device & ONENAND_DEVICE_VCC_MASK;
         demuxed = device & ONENAND_DEVICE_IS_DEMUX;
         ddp = device & ONENAND_DEVICE_IS_DDP;
-        density = device >> ONENAND_DEVICE_DENSITY_SHIFT;
+        density = onenand_get_density(device);
         printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n",
                 demuxed ? "" : "Muxed ",
                 ddp ? "(DDP)" : "",
@@ -2492,7 +2489,7 @@ static int onenand_probe(struct mtd_info *mtd)
         this->device_id = dev_id;
         this->version_id = ver_id;
 
-        density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
+        density = onenand_get_density(dev_id);
         this->chipsize = (16 << density) << 20;
         /* Set density mask. it is used for DDP */
         if (ONENAND_IS_DDP(this))
diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h
index c46161f4eee3..d1b310c92eb4 100644
--- a/include/linux/mtd/onenand_regs.h
+++ b/include/linux/mtd/onenand_regs.h
@@ -67,6 +67,7 @@
 /*
  * Device ID Register F001h (R)
  */
+#define ONENAND_DEVICE_DENSITY_MASK     (0xf)
 #define ONENAND_DEVICE_DENSITY_SHIFT    (4)
 #define ONENAND_DEVICE_IS_DDP           (1 << 3)
 #define ONENAND_DEVICE_IS_DEMUX         (1 << 2)