From 3b85c3211ebde263a86c8cd3c7277fdd2e440310 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Mon, 25 Sep 2006 17:06:53 +0100 Subject: [MTD NAND] Split nand_scan() into two parts; allow board driver to intervene Signed-off-by: David Woodhouse --- include/linux/mtd/nand.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 0b4cd2fa64a..88d690d79d7 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -27,6 +27,11 @@ struct mtd_info; /* Scan and identify a NAND device */ extern int nand_scan (struct mtd_info *mtd, int max_chips); +/* Separate phases of nand_scan(), allowing board driver to intervene + * and override command or ECC setup according to flash type */ +extern int nand_scan_ident(struct mtd_info *mtd, int max_chips); +extern int nand_scan_tail(struct mtd_info *mtd); + /* Free resources held by the NAND device */ extern void nand_release (struct mtd_info *mtd); -- cgit v1.2.3 From 4bf63fcb83dc761853f69a77b15e47712689020b Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Mon, 25 Sep 2006 17:08:04 +0100 Subject: [MTD NAND] Allocate chip->buffers separately to allow it to be overridden In particular, the board driver might need it to be DMAable. Signed-off-by: David Woodhouse --- include/linux/mtd/nand.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 88d690d79d7..cd4fe9ae862 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -183,7 +183,9 @@ typedef enum { #define NAND_USE_FLASH_BBT 0x00010000 /* This option skips the bbt scan during initialization. */ #define NAND_SKIP_BBTSCAN 0x00020000 - +/* This option is defined if the board driver allocates its own buffers + (e.g. because it needs them DMA-coherent */ +#define NAND_OWN_BUFFERS 0x00040000 /* Options set by nand scan */ /* Nand scan has allocated controller struct */ #define NAND_CONTROLLER_ALLOC 0x80000000 @@ -385,7 +387,7 @@ struct nand_chip { struct nand_ecclayout *ecclayout; struct nand_ecc_ctrl ecc; - struct nand_buffers buffers; + struct nand_buffers *buffers; struct nand_hw_control hwcontrol; struct mtd_oob_ops ops; -- cgit v1.2.3 From 956e944c7690ea994757a8cbedbb6241e1d9138f Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Mon, 25 Sep 2006 17:12:39 +0100 Subject: [MTD NAND] Allow override of page read and write functions. - allow high-level nand_write_page() function to be overridden - likewise low-level write_page_raw() and read_page_raw() functions - Clean up the abuse of chip->ecc.{write,read}_page() with MTD_OOB_RAW Signed-off-by: David Woodhouse --- include/linux/mtd/nand.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index cd4fe9ae862..2bcbcc89683 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -235,6 +235,8 @@ struct nand_hw_control { * be provided if an hardware ECC is available * @calculate: function for ecc calculation or readback from ecc hardware * @correct: function for ecc correction, matching to ecc generator (sw/hw) + * @read_page_raw: function to read a raw page without ECC + * @write_page_raw: function to write a raw page without ECC * @read_page: function to read a page according to the ecc generator requirements * @write_page: function to write a page according to the ecc generator requirements * @read_oob: function to read chip OOB data @@ -256,6 +258,12 @@ struct nand_ecc_ctrl { int (*correct)(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc, uint8_t *calc_ecc); + int (*read_page_raw)(struct mtd_info *mtd, + struct nand_chip *chip, + uint8_t *buf); + void (*write_page_raw)(struct mtd_info *mtd, + struct nand_chip *chip, + const uint8_t *buf); int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf); @@ -344,6 +352,7 @@ struct nand_buffers { * @priv: [OPTIONAL] pointer to private chip date * @errstat: [OPTIONAL] hardware specific function to perform additional error status checks * (determine if errors are correctable) + * @write_page [REPLACEABLE] High-level page write function */ struct nand_chip { @@ -366,6 +375,8 @@ struct nand_chip { void (*erase_cmd)(struct mtd_info *mtd, int page); int (*scan_bbt)(struct mtd_info *mtd); int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page); + int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf, int page, int cached, int raw); int chip_delay; unsigned int options; -- cgit v1.2.3 From b77d95c78fb0ec330cd53e0d297ffa4fd2975e32 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Mon, 25 Sep 2006 21:58:50 +0100 Subject: [MTD NAND] Provide prototype for newly-exported nand_wait_ready() Signed-off-by: David Woodhouse --- include/linux/mtd/nand.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 2bcbcc89683..70420bbae82 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -35,6 +35,9 @@ extern int nand_scan_tail(struct mtd_info *mtd); /* Free resources held by the NAND device */ extern void nand_release (struct mtd_info *mtd); +/* Internal helper for board drivers which need to override command function */ +extern void nand_wait_ready(struct mtd_info *mtd); + /* The maximum number of NAND chips in an array */ #define NAND_MAX_CHIPS 8 -- cgit v1.2.3 From 28b79ff9661b22e4c41c0d00d4ab8503e810f13d Mon Sep 17 00:00:00 2001 From: Kyungmin Park Date: Tue, 26 Sep 2006 09:45:28 +0000 Subject: [MTD ONENAND] Check OneNAND lock scheme & all block unlock command support OneNAND lock scheme depends on density and process of chip. Some OneNAND chips support all block unlock Signed-off-by: Kyungmin Park Signed-off-by: David Woodhouse --- include/linux/mtd/onenand.h | 6 ++++-- include/linux/mtd/onenand_regs.h | 4 +++- 2 files changed, 7 insertions(+), 3 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mtd/onenand.h b/include/linux/mtd/onenand.h index 1f497215524..6f045b586e7 100644 --- a/include/linux/mtd/onenand.h +++ b/include/linux/mtd/onenand.h @@ -1,7 +1,7 @@ /* * linux/include/linux/mtd/onenand.h * - * Copyright (C) 2005 Samsung Electronics + * Copyright (C) 2005-2006 Samsung Electronics * Kyungmin Park * * This program is free software; you can redistribute it and/or modify @@ -96,6 +96,7 @@ struct onenand_chip { void __iomem *base; unsigned int chipsize; unsigned int device_id; + unsigned int version_id; unsigned int density_mask; unsigned int options; @@ -149,7 +150,8 @@ struct onenand_chip { /* * Options bits */ -#define ONENAND_CONT_LOCK (0x0001) +#define ONENAND_HAS_CONT_LOCK (0x0001) +#define ONENAND_HAS_UNLOCK_ALL (0x0002) #define ONENAND_PAGEBUF_ALLOC (0x1000) /* diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h index 4a72818d254..9e409fe6ded 100644 --- a/include/linux/mtd/onenand_regs.h +++ b/include/linux/mtd/onenand_regs.h @@ -3,7 +3,7 @@ * * OneNAND Register header file * - * Copyright (C) 2005 Samsung Electronics + * Copyright (C) 2005-2006 Samsung Electronics * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -72,6 +72,7 @@ #define ONENAND_DEVICE_VCC_MASK (0x3) #define ONENAND_DEVICE_DENSITY_512Mb (0x002) +#define ONENAND_DEVICE_DENSITY_1Gb (0x003) /* * Version ID Register F002h (R) @@ -110,6 +111,7 @@ #define ONENAND_CMD_UNLOCK (0x23) #define ONENAND_CMD_LOCK (0x2A) #define ONENAND_CMD_LOCK_TIGHT (0x2C) +#define ONENAND_CMD_UNLOCK_ALL (0x27) #define ONENAND_CMD_ERASE (0x94) #define ONENAND_CMD_RESET (0xF0) #define ONENAND_CMD_OTP_ACCESS (0x65) -- cgit v1.2.3