[U-Boot] [PATCH] OneNAND: Fix compiler warnings and add weak attribute to memcpy_16()

[Stefan Roese <sr@denx.de>]

This patch adds memcpy_16_from_onenand() and memcpy_16_to_onenand()
functions and defaults them to the already available memcpy_16()
function. They are defined weak so that they can be overwritten by
a board/platform specific version.

This is needed for the vcth board support (still to come) which needs
custom access routines here.

It also removes some compiler warnings by adding the onenand_get_2x_blockpage()
function and removing the onenand_lock()/onenand_unlock() functions.

Signed-off-by: Stefan Roese <sr@denx.de>
---

This patch has to be applied on top of the patch submitted by Kyungmin Park
on 2008-11-04:
[PATCH] [OneNAND] Sync with 2.6.27


 drivers/mtd/onenand/onenand_base.c |   38 ++++++++++++++++++++++++++++++++---
 1 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 66214e8..5c752ca 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -24,7 +24,7 @@
 #include <malloc.h>
 
 /* It should access 16-bit instead of 8-bit */
-static inline void *memcpy_16(void *dst, const void *src, unsigned int len)
+void *__memcpy_16(void *dst, const void *src, unsigned int len)
 {
 	void *ret = dst;
 	short *d = dst;
@@ -35,6 +35,10 @@ static inline void *memcpy_16(void *dst, const void *src, unsigned int len)
 		*d++ = *s++;
 	return ret;
 }
+void *memcpy_16_from_onenand(void *dst, const void *src, unsigned int len)
+	__attribute__((weak, alias("__memcpy_16")));
+void *memcpy_16_to_onenand(void *dst, const void *src, unsigned int len)
+	__attribute__((weak, alias("__memcpy_16")));
 
 static const unsigned char ffchars[] = {
 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
@@ -349,7 +353,7 @@ static int onenand_read_bufferram(struct mtd_info *mtd, loff_t addr, int area,
 	bufferram = this->base + area;
 	bufferram += onenand_bufferram_offset(mtd, area);
 
-	memcpy_16(buffer, bufferram + offset, count);
+	memcpy_16_from_onenand(buffer, bufferram + offset, count);
 
 	return 0;
 }
@@ -376,7 +380,7 @@ static int onenand_sync_read_bufferram(struct mtd_info *mtd, loff_t addr, int ar
 
 	this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
 
-	memcpy_16(buffer, bufferram + offset, count);
+	memcpy_16_from_onenand(buffer, bufferram + offset, count);
 
 	this->mmcontrol(mtd, 0);
 
@@ -403,12 +407,36 @@ static int onenand_write_bufferram(struct mtd_info *mtd, loff_t addr, int area,
 	bufferram = this->base + area;
 	bufferram += onenand_bufferram_offset(mtd, area);
 
-	memcpy_16(bufferram + offset, buffer, count);
+	memcpy_16_to_onenand(bufferram + offset, buffer, count);
 
 	return 0;
 }
 
 /**
+ * onenand_get_2x_blockpage - [GENERIC] Get blockpage at 2x program mode
+ * @param mtd		MTD data structure
+ * @param addr		address to check
+ * @return		blockpage address
+ *
+ * Get blockpage address at 2x program mode
+ */
+static int onenand_get_2x_blockpage(struct mtd_info *mtd, loff_t addr)
+{
+	struct onenand_chip *this = mtd->priv;
+	int blockpage, block, page;
+
+	/* Calculate the even block number */
+	block = (int) (addr >> this->erase_shift) & ~1;
+	/* Is it the odd plane? */
+	if (addr & this->writesize)
+		block++;
+	page = (int) (addr >> (this->page_shift + 1)) & this->page_mask;
+	blockpage = (block << 7) | page;
+
+	return blockpage;
+}
+
+/**
  * onenand_check_bufferram - [GENERIC] Check BufferRAM information
  * @param mtd		MTD data structure
  * @param addr		address to check
@@ -1666,6 +1694,7 @@ static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int
 	return 0;
 }
 
+#ifdef ONENAND_LINUX
 /**
  * onenand_lock - [MTD Interface] Lock block(s)
  * @param mtd           MTD device structure
@@ -1701,6 +1730,7 @@ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
 	onenand_release_device(mtd);
 	return ret;
 }
+#endif
 
 /**
  * onenand_check_lock_status - [OneNAND Interface] Check lock status
-- 
1.6.0.3