[PATCH] OneNAND: Sync. Burst Read support

Add OneNAND Sync. Burst Read support
Tested with OMAP platform

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 37 insertions, 2 deletions

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index bcce22ae3cb1..e87489505772 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -379,6 +379,35 @@ static int onenand_read_bufferram(struct mtd_info *mtd, int area,
 }
 
 /**
+ * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
+ * @param mtd           MTD data structure
+ * @param area          BufferRAM area
+ * @param buffer        the databuffer to put/get data
+ * @param offset        offset to read from or write to
+ * @param count         number of bytes to read/write
+ *
+ * Read the BufferRAM area with Sync. Burst Mode
+ */
+static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area,
+                unsigned char *buffer, int offset, size_t count)
+{
+        struct onenand_chip *this = mtd->priv;
+        void __iomem *bufferram;
+
+        bufferram = this->base + area;
+
+        bufferram += onenand_bufferram_offset(mtd, area);
+
+        this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
+
+        memcpy(buffer, bufferram + offset, count);
+
+        this->mmcontrol(mtd, 0);
+
+        return 0;
+}
+
+/**
  * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
  * @param mtd           MTD data structure
  * @param area          BufferRAM area
@@ -1273,8 +1302,8 @@ static int onenand_check_maf(int manuf)
                         break;
         }
 
-        printk(KERN_DEBUG "OneNAND Manufacturer: %s\n",
-                onenand_manuf_ids[i].name);
+        printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n",
+                onenand_manuf_ids[i].name, manuf);
 
         return (i != ONENAND_MFR_UNKNOWN);
 }
@@ -1385,6 +1414,12 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
         if (onenand_probe(mtd))
                 return -ENXIO;
 
+        /* Set Sync. Burst Read after probing */
+        if (this->mmcontrol) {
+                printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
+                this->read_bufferram = onenand_sync_read_bufferram;
+        }
+
         this->state = FL_READY;
         init_waitqueue_head(&this->wq);
         spin_lock_init(&this->chip_lock);