openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

mtd: spi-nor: spansion: fix writes on S25FS512S 

Spansion S25FS-S family has an issue in the Basic Flash Parameter Table
(BFPT): Dword-11 bits 7:4 specify a page size of 512 bytes.  Actually
this is configurable in the vendor unique register (CR3V) and even the
factory default setting is to "wrap at 256 bytes", so blindly relying
on BFPT breaks the page writes on these chips. Add the post-BFPT fixup
which restores the default page size of 256 bytes -- to properly read
CR3V this early is quite intrusive and should better be done as a new
feature; Alexander Sverdlin had the patch doing that:

https://patchwork.ozlabs.org/project/linux-mtd/patch/20200227123657.26030-1-alexander.sverdlin@nokia.com/

Fixes: dfd2b74530 ("mtd: spi-nor: add Spansion S25FS512S ID")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Tested-by: Kuldeep Singh <kuldeep.singh@nxp.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
This commit is contained in:
Sergei Shtylyov 2020-04-20 22:13:58 +03:00 committed by Tudor Ambarus
parent b846915963
commit 5587fa4897
No known key found for this signature in database
GPG Key ID: 4B554F47A58D14E9
1 changed files with 23 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/mtd/spi-nor/spansion.c
View File

@ -8,6 +8,27 @@
#include "core.h"
static int
s25fs_s_post_bfpt_fixups(struct spi_nor *nor,
const struct sfdp_parameter_header *bfpt_header,
const struct sfdp_bfpt *bfpt,
struct spi_nor_flash_parameter *params)
{
/*
* The S25FS-S chip family reports 512-byte pages in BFPT but
* in reality the write buffer still wraps at the safe default
* of 256 bytes. Overwrite the page size advertised by BFPT
* to get the writes working.
*/
params->page_size = 256;
return 0;
}
static struct spi_nor_fixups s25fs_s_fixups = {
.post_bfpt = s25fs_s_post_bfpt_fixups,
};
static const struct flash_info spansion_parts[] = {
/* Spansion/Cypress -- single (large) sector size only, at least
* for the chips listed here (without boot sectors).
@ -32,8 +53,8 @@ static const struct flash_info spansion_parts[] = {
SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
SPI_NOR_HAS_LOCK | USE_CLSR) },
{ "s25fs512s", INFO6(0x010220, 0x4d0081, 256 * 1024, 256,
SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
USE_CLSR) },
SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR)
.fixups = &s25fs_s_fixups, },
{ "s70fl01gs", INFO(0x010221, 0x4d00, 256 * 1024, 256, 0) },
{ "s25sl12800", INFO(0x012018, 0x0300, 256 * 1024, 64, 0) },
{ "s25sl12801", INFO(0x012018, 0x0301, 64 * 1024, 256, 0) },