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authorTudor Ambarus <tudor.ambarus@microchip.com>2019-11-07 11:41:58 +0300
committerTudor Ambarus <tudor.ambarus@microchip.com>2019-11-11 09:56:36 +0300
commit4da11da15a7cc56432a92ee47748c95cf29dbe3d (patch)
treede6a6a5cdf071d1f577671250ea7f93fd3c08b25 /drivers/mtd
parent3e0930f109e76922ea1742a9c8c1cc16f052ad45 (diff)
downloadlinux-4da11da15a7cc56432a92ee47748c95cf29dbe3d.tar.xz
mtd: spi-nor: Extend the SR Read Back test
Test that all the bits from Status Register 1 and Status Register 2 were written correctly. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/spi-nor.c58
1 files changed, 39 insertions, 19 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 06aac894ee6d..d33ad56d3b67 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -2047,20 +2047,7 @@ static int macronix_quad_enable(struct spi_nor *nor)
nor->bouncebuf[0] |= SR_QUAD_EN_MX;
- ret = spi_nor_write_sr(nor, nor->bouncebuf, 1);
- if (ret)
- return ret;
-
- ret = spi_nor_read_sr(nor, nor->bouncebuf);
- if (ret)
- return ret;
-
- if (!(nor->bouncebuf[0] & SR_QUAD_EN_MX)) {
- dev_dbg(nor->dev, "Macronix Quad bit not set\n");
- return -EIO;
- }
-
- return 0;
+ return spi_nor_write_sr1_and_check(nor, nor->bouncebuf[0]);
}
/**
@@ -2080,6 +2067,7 @@ static int spansion_no_read_cr_quad_enable(struct spi_nor *nor)
{
u8 *sr_cr = nor->bouncebuf;
int ret;
+ u8 sr_written;
/* Keep the current value of the Status Register. */
ret = spi_nor_read_sr(nor, sr_cr);
@@ -2088,7 +2076,22 @@ static int spansion_no_read_cr_quad_enable(struct spi_nor *nor)
sr_cr[1] = CR_QUAD_EN_SPAN;
- return spi_nor_write_sr(nor, sr_cr, 2);
+ ret = spi_nor_write_sr(nor, sr_cr, 2);
+ if (ret)
+ return ret;
+
+ sr_written = sr_cr[0];
+
+ ret = spi_nor_read_sr(nor, sr_cr);
+ if (ret)
+ return ret;
+
+ if (sr_cr[0] != sr_written) {
+ dev_err(nor->dev, "SR: Read back test failed\n");
+ return -EIO;
+ }
+
+ return 0;
}
/**
@@ -2108,6 +2111,7 @@ static int spansion_read_cr_quad_enable(struct spi_nor *nor)
{
u8 *sr_cr = nor->bouncebuf;
int ret;
+ u8 sr_written;
/* Check current Quad Enable bit value. */
ret = spi_nor_read_cr(nor, &sr_cr[1]);
@@ -2128,13 +2132,26 @@ static int spansion_read_cr_quad_enable(struct spi_nor *nor)
if (ret)
return ret;
+ sr_written = sr_cr[0];
+
+ ret = spi_nor_read_sr(nor, sr_cr);
+ if (ret)
+ return ret;
+
+ if (sr_written != sr_cr[0]) {
+ dev_err(nor->dev, "SR: Read back test failed\n");
+ return -EIO;
+ }
+
+ sr_written = sr_cr[1];
+
/* Read back and check it. */
ret = spi_nor_read_cr(nor, &sr_cr[1]);
if (ret)
return ret;
- if (!(sr_cr[1] & CR_QUAD_EN_SPAN)) {
- dev_dbg(nor->dev, "Spansion Quad bit not set\n");
+ if (sr_cr[1] != sr_written) {
+ dev_dbg(nor->dev, "CR: Read back test failed\n");
return -EIO;
}
@@ -2157,6 +2174,7 @@ static int sr2_bit7_quad_enable(struct spi_nor *nor)
{
u8 *sr2 = nor->bouncebuf;
int ret;
+ u8 sr2_written;
/* Check current Quad Enable bit value. */
ret = spi_nor_read_sr2(nor, sr2);
@@ -2172,13 +2190,15 @@ static int sr2_bit7_quad_enable(struct spi_nor *nor)
if (ret)
return ret;
+ sr2_written = *sr2;
+
/* Read back and check it. */
ret = spi_nor_read_sr2(nor, sr2);
if (ret)
return ret;
- if (!(*sr2 & SR2_QUAD_EN_BIT7)) {
- dev_dbg(nor->dev, "SR2 Quad bit not set\n");
+ if (*sr2 != sr2_written) {
+ dev_dbg(nor->dev, "SR2: Read back test failed\n");
return -EIO;
}