Flex-OneNAND driver support

This patch adds support for Flex-OneNAND devices.

Signed-off-by: Rohit Hagargundgi <h.rohit@samsung.com>
Signed-off-by: Amul Kumar Saha <amul.saha@samsung.com>

2 files changed, 31 insertions, 3 deletions

diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h
index 9a6f317..68e174e 100644
--- a/include/linux/mtd/onenand.h
+++ b/include/linux/mtd/onenand.h
@@ -20,8 +20,9 @@
 #include <linux/mtd/compat.h>
 #include <linux/mtd/bbm.h>
 
+#define MAX_DIES		2
 #define MAX_BUFFERRAM		2
-#define MAX_ONENAND_PAGESIZE	(2048 + 64)
+#define MAX_ONENAND_PAGESIZE	(4096 + 128)
 
 /* Scan and identify a OneNAND device */
 extern int onenand_scan (struct mtd_info *mtd, int max_chips);
@@ -39,9 +40,14 @@ struct onenand_bufferram {
 /**
  * struct onenand_chip - OneNAND Private Flash Chip Data
  * @param base		[BOARDSPECIFIC] address to access OneNAND
+ * @dies:               [INTERN][FLEXONENAND] number of dies on chip
+ * @boundary:           [INTERN][FLEXONENAND] Boundary of the dies
+ * @diesize:            [INTERN][FLEXONENAND] Size of the dies
  * @param chipsize	[INTERN] the size of one chip for multichip arrays
  * @param device_id	[INTERN] device ID
  * @param verstion_id	[INTERN] version ID
+ * @technology		[INTERN] describes the internal NAND array technology such as SLC or MLC.
+ * @density_mask:	[INTERN] chip density, used for DDP devices
  * @param options	[BOARDSPECIFIC] various chip options. They can partly be set to inform onenand_scan about
  * @param erase_shift	[INTERN] number of address bits in a block
  * @param page_shift	[INTERN] number of address bits in a page
@@ -64,9 +70,13 @@ struct onenand_bufferram {
  */
 struct onenand_chip {
 	void __iomem *base;
+	unsigned int dies;
+	unsigned int boundary[MAX_DIES];
+	unsigned int diesize[MAX_DIES];
 	unsigned int chipsize;
 	unsigned int device_id;
 	unsigned int version_id;
+	unsigned int technology;
 	unsigned int density_mask;
 	unsigned int options;
 
@@ -124,6 +134,8 @@ struct onenand_chip {
 #define ONENAND_SET_BUFFERRAM0(this)		(this->bufferram_index = 0)
 #define ONENAND_SET_BUFFERRAM1(this)		(this->bufferram_index = 1)
 
+#define FLEXONENAND(this)	(this->device_id & DEVICE_IS_FLEXONENAND)
+#define ONENAND_IS_MLC(this)	(this->technology & ONENAND_TECHNOLOGY_IS_MLC)
 #define ONENAND_IS_DDP(this)						\
 	(this->device_id & ONENAND_DEVICE_IS_DDP)
 
@@ -157,4 +169,6 @@ struct onenand_manufacturers {
 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
 			struct mtd_oob_ops *ops);
 
+unsigned int onenand_block(struct onenand_chip *this, loff_t addr);
+int flexonenand_region(struct mtd_info *mtd, loff_t addr);
 #endif				/* __LINUX_MTD_ONENAND_H */
diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h
index 07fed1c..8449a3c 100644
--- a/include/linux/mtd/onenand_regs.h
+++ b/include/linux/mtd/onenand_regs.h
@@ -67,6 +67,9 @@
 /*
  * Device ID Register F001h (R)
  */
+#define DEVICE_IS_FLEXONENAND		(1 << 9)
+#define FLEXONENAND_PI_MASK		(0x3ff)
+#define FLEXONENAND_PI_UNLOCK_SHIFT	(14)
 #define ONENAND_DEVICE_DENSITY_MASK	(0xf)
 #define ONENAND_DEVICE_DENSITY_SHIFT	(4)
 #define ONENAND_DEVICE_IS_DDP		(1 << 3)
@@ -84,6 +87,11 @@
 #define ONENAND_VERSION_PROCESS_SHIFT	(8)
 
 /*
+ * Technology Register F006h (R)
+ */
+#define ONENAND_TECHNOLOGY_IS_MLC	(1 << 0)
+
+/*
  * Start Address 1 F100h (R/W)
  */
 #define ONENAND_DDP_SHIFT		(15)
@@ -93,7 +101,7 @@
 /*
  * Start Address 8 F107h (R/W)
  */
-#define ONENAND_FPA_MASK		(0x3f)
+#define ONENAND_FPA_MASK		(0x7f)
 #define ONENAND_FPA_SHIFT		(2)
 #define ONENAND_FSA_MASK		(0x03)
 
@@ -105,7 +113,7 @@
 #define ONENAND_BSA_BOOTRAM		(0 << 2)
 #define ONENAND_BSA_DATARAM0		(2 << 2)
 #define ONENAND_BSA_DATARAM1		(3 << 2)
-#define ONENAND_BSC_MASK		(0x03)
+#define ONENAND_BSC_MASK		(0x07)
 
 /*
  * Command Register F220h (R/W)
@@ -125,9 +133,14 @@
 #define ONENAND_CMD_ERASE_VERIFY	(0x71)
 #define ONENAND_CMD_RESET		(0xF0)
 #define ONENAND_CMD_READID		(0x90)
+#define FLEXONENAND_CMD_RESET		(0xF3)
+#define FLEXONENAND_CMD_PI_UPDATE	(0x05)
+#define FLEXONENAND_CMD_PI_ACCESS	(0x66)
+#define FLEXONENAND_CMD_RECOVER_LSB	(0x05)
 
 /* NOTE: Those are not *REAL* commands */
 #define ONENAND_CMD_BUFFERRAM		(0x1978)
+#define FLEXONENAND_CMD_READ_PI		(0x1985)
 
 /*
  * System Configuration 1 Register F221h (R, R/W)
@@ -190,5 +203,6 @@
 #define ONENAND_ECC_2BIT		(1 << 1)
 #define ONENAND_ECC_2BIT_ALL		(0xAAAA)
 #define ONENAND_ECC_4BIT_UNCORRECTABLE	(0x1010)
+#define FLEXONENAND_UNCORRECTABLE_ERROR (0x1010)
 
 #endif				/* __ONENAND_REG_H */