[PATCH 2/2] mtd: nand: spi: Support GigaDevice GD5F1GQ5UExxG
Reto Schneider
code at reto-schneider.ch
Wed Feb 10 19:36:20 CET 2021
From: Reto Schneider <reto.schneider at husqvarnagroup.com>
The relevant changes to the already existing GD5F1GQ4UExxG support has
been determined by consulting the GigaDevice product change notice
AN-0392-10, version 1.0 from November 30, 2020.
As the overlaps are huge, variable names have been generalized
accordingly.
Apart form the lowered ECC strength (4 instead of 8 bits per 512 bytes),
the new device ID, and the extra quad IO dummy byte, no changes had to
be taken into account.
New hardware features are not supported, namely:
- Power on reset
- Unique ID
- Double transfer rate (DTR)
- Parameter page
- Random data quad IO
The inverted semantic of the "driver strength" register bits, defaulting
to 100% instead of 50% for the Q5 devices, got ignored as the driver has
never touched them anyway.
The no longer supported "read from cache during block erase"
functionality I do not know how to reflect.
Implementation has been tested on MediaTek MT7688 based GARDENA smart
Gateways using both, GigaDevice GD5F1GQ5UEYIG and GD5F1GQ4UBYIG.
Signed-off-by: Reto Schneider <reto.schneider at husqvarnagroup.com>
CC: Stefan Roese <sr at denx.de>
---
drivers/mtd/nand/spi/gigadevice.c | 79 +++++++++++++++++++++++++++----
1 file changed, 69 insertions(+), 10 deletions(-)
diff --git a/drivers/mtd/nand/spi/gigadevice.c b/drivers/mtd/nand/spi/gigadevice.c
index 5de0ebbb7b..a2c93486f4 100644
--- a/drivers/mtd/nand/spi/gigadevice.c
+++ b/drivers/mtd/nand/spi/gigadevice.c
@@ -17,9 +17,13 @@
#define GD5FXGQ4XA_STATUS_ECC_1_7_BITFLIPS (1 << 4)
#define GD5FXGQ4XA_STATUS_ECC_8_BITFLIPS (3 << 4)
-#define GD5FXGQ4XEXXG_REG_STATUS2 0xf0
+#define GD5FXGQ5XE_STATUS_ECC_1_4_BITFLIPS (1 << 4)
+#define GD5FXGQ5XE_STATUS_ECC_4_BITFLIPS (3 << 4)
-static SPINAND_OP_VARIANTS(read_cache_variants,
+#define GD5FXGQXXEXXG_REG_STATUS2 0xf0
+
+/* Q4 devices, QUADIO: Dummy bytes valid for 1 and 2 GBit variants */
+static SPINAND_OP_VARIANTS(gd5fxgq4_read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
@@ -27,6 +31,15 @@ static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+/* Q5 devices, QUADIO: Dummy bytes only valid for 1 GBit variants */
+static SPINAND_OP_VARIANTS(gd5f1gq5_read_cache_variants,
+ SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
+ SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+
static SPINAND_OP_VARIANTS(write_cache_variants,
SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
SPINAND_PROG_LOAD(true, 0, NULL, 0));
@@ -35,7 +48,7 @@ static SPINAND_OP_VARIANTS(update_cache_variants,
SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
SPINAND_PROG_LOAD(false, 0, NULL, 0));
-static int gd5fxgq4xexxg_ooblayout_ecc(struct mtd_info *mtd, int section,
+static int gd5fxgqxxexxg_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
@@ -47,7 +60,7 @@ static int gd5fxgq4xexxg_ooblayout_ecc(struct mtd_info *mtd, int section,
return 0;
}
-static int gd5fxgq4xexxg_ooblayout_free(struct mtd_info *mtd, int section,
+static int gd5fxgqxxexxg_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
@@ -64,7 +77,7 @@ static int gd5fxgq4xexxg_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
u8 status2;
- struct spi_mem_op op = SPINAND_GET_FEATURE_OP(GD5FXGQ4XEXXG_REG_STATUS2,
+ struct spi_mem_op op = SPINAND_GET_FEATURE_OP(GD5FXGQXXEXXG_REG_STATUS2,
&status2);
int ret;
@@ -102,21 +115,67 @@ static int gd5fxgq4xexxg_ecc_get_status(struct spinand_device *spinand,
return -EINVAL;
}
-static const struct mtd_ooblayout_ops gd5fxgq4xexxg_ooblayout = {
- .ecc = gd5fxgq4xexxg_ooblayout_ecc,
- .rfree = gd5fxgq4xexxg_ooblayout_free,
+static int gd5fxgq5xexxg_ecc_get_status(struct spinand_device *spinand,
+ u8 status)
+{
+ u8 status2;
+ struct spi_mem_op op = SPINAND_GET_FEATURE_OP(GD5FXGQXXEXXG_REG_STATUS2,
+ &status2);
+ int ret;
+
+ switch (status & STATUS_ECC_MASK) {
+ case STATUS_ECC_NO_BITFLIPS:
+ return 0;
+
+ case GD5FXGQ5XE_STATUS_ECC_1_4_BITFLIPS:
+ /*
+ * Read status2 register to determine a more fine grained
+ * bit error status
+ */
+ ret = spi_mem_exec_op(spinand->slave, &op);
+ if (ret)
+ return ret;
+
+ /*
+ * 1 ... 4 bits are flipped (and corrected)
+ */
+ /* bits sorted this way (1...0): ECCSE1, ECCSE0 */
+ return ((status2 & STATUS_ECC_MASK) >> 4) + 1;
+
+ case STATUS_ECC_UNCOR_ERROR:
+ return -EBADMSG;
+
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static const struct mtd_ooblayout_ops gd5fxgqxxexxg_ooblayout = {
+ .ecc = gd5fxgqxxexxg_ooblayout_ecc,
+ .rfree = gd5fxgqxxexxg_ooblayout_free,
};
static const struct spinand_info gigadevice_spinand_table[] = {
SPINAND_INFO("GD5F1GQ4UExxG", 0xd1,
NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
NAND_ECCREQ(8, 512),
- SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+ SPINAND_INFO_OP_VARIANTS(&gd5fxgq4_read_cache_variants,
&write_cache_variants,
&update_cache_variants),
0,
- SPINAND_ECCINFO(&gd5fxgq4xexxg_ooblayout,
+ SPINAND_ECCINFO(&gd5fxgqxxexxg_ooblayout,
gd5fxgq4xexxg_ecc_get_status)),
+ SPINAND_INFO("GD5F1GQ5UExxG", 0x51,
+ NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
+ NAND_ECCREQ(4, 512),
+ SPINAND_INFO_OP_VARIANTS(&gd5f1gq5_read_cache_variants,
+ &write_cache_variants,
+ &update_cache_variants),
+ 0,
+ SPINAND_ECCINFO(&gd5fxgqxxexxg_ooblayout,
+ gd5fxgq5xexxg_ecc_get_status)),
};
static int gigadevice_spinand_detect(struct spinand_device *spinand)
--
2.29.2
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