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authorTokunori Ikegami <ikegami.t@gmail.com>2019-08-06 04:03:23 +0900
committerVignesh Raghavendra <vigneshr@ti.com>2019-08-27 17:55:53 +0530
commit816a6d1481a55983ba527a93702160cf210acade (patch)
tree4010104bd7c4debbf0dc8ae255c75ac6dca33dd8 /drivers/mtd/chips/cfi_cmdset_0002.c
parent228c05c2d73e072b78d0c661c2d8717d0310ef35 (diff)
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>
Diffstat (limited to 'drivers/mtd/chips/cfi_cmdset_0002.c')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c38
1 files changed, 22 insertions, 16 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index d7e7a1a8cbdf..8f0ee552837e 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -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);
}