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mtd: cfi_cmdset_0002: Split write-to-buffer-reset sequence 

Just refactor to split the sequence from do_write_buffer().

Cc: Fabio Bettoni <fbettoni@gmail.com>
Co: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Tokunori Ikegami 2019-08-06 04:03:23 +09:00 committed by Vignesh Raghavendra
parent 228c05c2d7
commit 816a6d1481
1 changed files with 22 additions and 16 deletions
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38
drivers/mtd/chips/cfi_cmdset_0002.c
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@ -1919,6 +1919,27 @@ static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len,
return 0;
}
static void __xipram do_write_buffer_reset(struct map_info *map,
struct flchip *chip,
struct cfi_private *cfi)
{
/*
* Recovery from write-buffer programming failures requires
* the write-to-buffer-reset sequence. Since the last part
* of the sequence also works as a normal reset, we can run
* the same commands regardless of why we are here.
* See e.g.
* http://www.spansion.com/Support/Application%20Notes/MirrorBit_Write_Buffer_Prog_Page_Buffer_Read_AN.pdf
*/
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi,
cfi->device_type, NULL);
cfi_send_gen_cmd(0xF0, cfi->addr_unlock1, chip->start, map, cfi,
cfi->device_type, NULL);
/* FIXME - should have reset delay before continuing */
}
/*
* FIXME: interleaved mode not tested, and probably not supported!
@ -2026,23 +2047,8 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
}
if (ret) {
/*
* Recovery from write-buffer programming failures requires
* the write-to-buffer-reset sequence. Since the last part
* of the sequence also works as a normal reset, we can run
* the same commands regardless of why we are here.
* See e.g.
* http://www.spansion.com/Support/Application%20Notes/MirrorBit_Write_Buffer_Prog_Page_Buffer_Read_AN.pdf
*/
cfi_check_err_status(map, chip, adr);
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi,
cfi->device_type, NULL);
cfi_send_gen_cmd(0xF0, cfi->addr_unlock1, chip->start, map, cfi,
cfi->device_type, NULL);
/* FIXME - should have reset delay before continuing */
do_write_buffer_reset(map, chip, cfi);
pr_err("MTD %s(): software timeout, address:0x%.8lx.\n",
__func__, adr);
}