lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[MTD] NAND: add subpage write support

Browse Source 
Many SLC NANDs support up to 4 writes at one NAND page. Add support
of this feature.

Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
This commit is contained in:
Thomas Gleixner
2006-09-28 15:38:36 +02:00
committed by Artem Bityutskiy
parent f6a7ecb18d
commit 29072b9607
5 changed files with 57 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/mtd/nand.h
View File

@ -166,6 +166,9 @@ typedef enum {
* for all large page devices, as they do not support
* autoincrement.*/
#define NAND_NO_READRDY 0x00000100
/* Chip does not allow subpage writes */
#define NAND_NO_SUBPAGE_WRITE 0x00000200
/* Options valid for Samsung large page devices */
#define NAND_SAMSUNG_LP_OPTIONS \
@ -193,6 +196,9 @@ typedef enum {
/* Nand scan has allocated controller struct */
#define NAND_CONTROLLER_ALLOC 0x80000000
/* Cell info constants */
#define NAND_CI_CHIPNR_MSK 0x03
#define NAND_CI_CELLTYPE_MSK 0x0C
/*
* nand_state_t - chip states
@ -341,6 +347,7 @@ struct nand_buffers {
* @chipsize: [INTERN] the size of one chip for multichip arrays
* @pagemask: [INTERN] page number mask = number of (pages / chip) - 1
* @pagebuf: [INTERN] holds the pagenumber which is currently in data_buf
* @subpagesize: [INTERN] holds the subpagesize
* @ecclayout: [REPLACEABLE] the default ecc placement scheme
* @bbt: [INTERN] bad block table pointer
* @bbt_td: [REPLACEABLE] bad block table descriptor for flash lookup
@ -388,6 +395,8 @@ struct nand_chip {
unsigned long chipsize;
int pagemask;
int pagebuf;
int subpagesize;
uint8_t cellinfo;
int badblockpos;
nand_state_t state;