ramips: force word write on flashes with AMD cmdset (#9252)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27385 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ramips/patches-2.6.37/011-mtd-cfi_cmdset_0002-force-word-write.patch

@@ -0,0 +1,70 @@
+--- a/drivers/mtd/chips/cfi_cmdset_0002.c
++++ b/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -39,7 +39,7 @@
+ #include <linux/mtd/xip.h>
+ 
+ #define AMD_BOOTLOC_BUG
+-#define FORCE_WORD_WRITE 0
++#define FORCE_WORD_WRITE 1
+ 
+ #define MAX_WORD_RETRIES 3
+ 
+@@ -50,7 +50,9 @@
+ 
+ static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
+ static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
++#if !FORCE_WORD_WRITE
+ static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
++#endif
+ static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *);
+ static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *);
+ static void cfi_amdstd_sync (struct mtd_info *);
+@@ -186,6 +188,7 @@ static void fixup_amd_bootblock(struct m
+ }
+ #endif
+ 
++#if !FORCE_WORD_WRITE
+ static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
+ {
+ 	struct map_info *map = mtd->priv;
+@@ -195,6 +198,7 @@ static void fixup_use_write_buffers(stru
+ 		mtd->write = cfi_amdstd_write_buffers;
+ 	}
+ }
++#endif /* !FORCE_WORD_WRITE */
+ 
+ /* Atmel chips don't use the same PRI format as AMD chips */
+ static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param)
+@@ -472,7 +476,7 @@ struct mtd_info *cfi_cmdset_0002(struct 
+ 
+ 			/*
+ 			 * Valid primary extension versions are: 1.0, 1.1, 1.2, 1.3, 1.4
+- 			 * see: Spec 1.3 http://cs.ozerki.net/zap/pub/axim-x5/docs/cfi_r20.pdf, page 19 
++ 			 * see: Spec 1.3 http://cs.ozerki.net/zap/pub/axim-x5/docs/cfi_r20.pdf, page 19
+  			 *               http://www.spansion.com/Support/AppNotes/cfi_100_20011201.pdf
+ 			 *      Spec 1.4 http://www.spansion.com/Support/AppNotes/CFI_Spec_AN_03.pdf, page 9
+ 			 */
+@@ -1386,6 +1390,7 @@ static int cfi_amdstd_write_words(struct
+ /*
+  * FIXME: interleaved mode not tested, and probably not supported!
+  */
++#if !FORCE_WORD_WRITE
+ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
+ 				    unsigned long adr, const u_char *buf,
+ 				    int len)
+@@ -1496,7 +1501,6 @@ static int __xipram do_write_buffer(stru
+ 	return ret;
+ }
+ 
+-
+ static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
+ 				    size_t *retlen, const u_char *buf)
+ {
+@@ -1575,6 +1579,7 @@ static int cfi_amdstd_write_buffers(stru
+ 
+ 	return 0;
+ }
++#endif /* !FORCE_WORD_WRITE */
+ 
+ 
+ /*