mtd: add helpers to get the supportted ONFI timing mode

[Linux-MTD Mailing List]

Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=3e70192c41ac607c63c31ea00be62dd9afb85575
Commit:     3e70192c41ac607c63c31ea00be62dd9afb85575
Parent:     7db03eccfc23783a95dd78383b3fad55224aaa7b
Author:     Huang Shijie <b32955 at freescale.com>
AuthorDate: Thu Sep 13 14:57:53 2012 +0800
Committer:  David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Sat Sep 29 15:54:36 2012 +0100

    mtd: add helpers to get the supportted ONFI timing mode
    
    add onfi_get_async_timing_mode() to get the supportted asynchronous
    timing mode.
    
    add onfi_get_sync_timing_mode() to get the supportted synchronous
    timing mode.
    
    Also add the neccessary macros : the timing modes.
    
    Signed-off-by: Huang Shijie <b32955 at freescale.com>
    Signed-off-by: Artem Bityutskiy <artem.bityutskiy at linux.intel.com>
    Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
 include/linux/mtd/nand.h |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 922f313..2beeb6e 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -231,6 +231,15 @@ typedef enum {
 /* Keep gcc happy */
 struct nand_chip;
 
+/* ONFI timing mode, used in both asynchronous and synchronous mode */
+#define ONFI_TIMING_MODE_0		(1 << 0)
+#define ONFI_TIMING_MODE_1		(1 << 1)
+#define ONFI_TIMING_MODE_2		(1 << 2)
+#define ONFI_TIMING_MODE_3		(1 << 3)
+#define ONFI_TIMING_MODE_4		(1 << 4)
+#define ONFI_TIMING_MODE_5		(1 << 5)
+#define ONFI_TIMING_MODE_UNKNOWN	(1 << 6)
+
 /* ONFI feature address */
 #define ONFI_FEATURE_ADDR_TIMING_MODE	0x1
 
@@ -684,4 +693,20 @@ struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
 	return chip->priv;
 }
 
+/* return the supported asynchronous timing mode. */
+static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
+{
+	if (!chip->onfi_version)
+		return ONFI_TIMING_MODE_UNKNOWN;
+	return le16_to_cpu(chip->onfi_params.async_timing_mode);
+}
+
+/* return the supported synchronous timing mode. */
+static inline int onfi_get_sync_timing_mode(struct nand_chip *chip)
+{
+	if (!chip->onfi_version)
+		return ONFI_TIMING_MODE_UNKNOWN;
+	return le16_to_cpu(chip->onfi_params.src_sync_timing_mode);
+}
+
 #endif /* __LINUX_MTD_NAND_H */