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mtd: nand: Support controllers with custom page

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If your controller already sends the required NAND commands when
reading or writing a page, then the framework is not supposed to
send READ0 and SEQIN/PAGEPROG respectively.

Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Marc Gonzalez
2016-11-15 10:56:20 +01:00
committed by Boris Brezillon
parent fc80f21a11
commit 3371d663bb
2 changed files with 43 additions and 3 deletions
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12
include/linux/mtd/nand.h
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@@ -142,6 +142,12 @@ enum nand_ecc_algo {
*/
#define NAND_ECC_GENERIC_ERASED_CHECK BIT(0)
#define NAND_ECC_MAXIMIZE BIT(1)
/*
* If your controller already sends the required NAND commands when
* reading or writing a page, then the framework is not supposed to
* send READ0 and SEQIN/PAGEPROG respectively.
*/
#define NAND_ECC_CUSTOM_PAGE_ACCESS BIT(2)
/* Bit mask for flags passed to do_nand_read_ecc */
#define NAND_GET_DEVICE 0x80
@@ -186,6 +192,7 @@ enum nand_ecc_algo {
/* Macros to identify the above */
#define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
#define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
#define NAND_HAS_SUBPAGE_WRITE(chip) !((chip)->options & NAND_NO_SUBPAGE_WRITE)
/* Non chip related options */
/* This option skips the bbt scan during initialization. */
@@ -568,6 +575,11 @@ struct nand_ecc_ctrl {
int page);
};
static inline int nand_standard_page_accessors(struct nand_ecc_ctrl *ecc)
{
return !(ecc->options & NAND_ECC_CUSTOM_PAGE_ACCESS);
}
/**
* struct nand_buffers - buffer structure for read/write
* @ecccalc: buffer pointer for calculated ECC, size is oobsize.