---

yaml --- r: 27756 b: refs/heads/master c: 9c01f87 h: refs/heads/master v: v3
git-mirror · May 12, 2006 · 929f529 · 929f529
1 parent 23e79bc
commit 929f529
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Showing 3 changed files with 42 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 628bee6593107c466e28462f58c5fd5cd4163c7c
+refs/heads/master: 9c01f87db183403a4f603fe5180c57b82b54b4a1
diff --git a/trunk/drivers/mtd/onenand/onenand_base.c b/trunk/drivers/mtd/onenand/onenand_base.c
@@ -373,6 +373,17 @@ static int onenand_read_bufferram(struct mtd_info *mtd, int area,
 
 	bufferram += onenand_bufferram_offset(mtd, area);
 
+	if (ONENAND_CHECK_BYTE_ACCESS(count)) {
+		unsigned short word;
+
+		/* Align with word(16-bit) size */
+		count--;
+
+		/* Read word and save byte */
+		word = this->read_word(bufferram + offset + count);
+		buffer[count] = (word & 0xff);
+	}
+
 	memcpy(buffer, bufferram + offset, count);
 
 	return 0;
@@ -400,6 +411,17 @@ static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area,
 
 	this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
 
+	if (ONENAND_CHECK_BYTE_ACCESS(count)) {
+		unsigned short word;
+
+		/* Align with word(16-bit) size */
+		count--;
+
+		/* Read word and save byte */
+		word = this->read_word(bufferram + offset + count);
+		buffer[count] = (word & 0xff);
+	}
+
 	memcpy(buffer, bufferram + offset, count);
 
 	this->mmcontrol(mtd, 0);
@@ -427,6 +449,22 @@ static int onenand_write_bufferram(struct mtd_info *mtd, int area,
 
 	bufferram += onenand_bufferram_offset(mtd, area);
 
+	if (ONENAND_CHECK_BYTE_ACCESS(count)) {
+		unsigned short word;
+		int byte_offset;
+
+		/* Align with word(16-bit) size */
+		count--;
+
+		/* Calculate byte access offset */
+		byte_offset = offset + count;
+
+		/* Read word and save byte */
+		word = this->read_word(bufferram + byte_offset);
+		word = (word & ~0xff) | buffer[count];
+		this->write_word(word, bufferram + byte_offset);
+	}
+
 	memcpy(bufferram + offset, buffer, count);
 
 	return 0;

diff --git a/trunk/include/linux/mtd/onenand.h b/trunk/include/linux/mtd/onenand.h
@@ -130,6 +130,9 @@ struct onenand_chip {
 #define ONENAND_SET_SYS_CFG1(v, this)					\
 	(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
 
+/* Check byte access in OneNAND */
+#define ONENAND_CHECK_BYTE_ACCESS(addr)		(addr & 0x1)
+
 /*
  * Options bits
  */