[v5,3/6] mtd: spi-nor: Extend the SR Read Back test
diff mbox series

Message ID 20191107084135.22122-4-tudor.ambarus@microchip.com
State Accepted
Delegated to: Ambarus Tudor
Headers show
Series
  • mtd: spi-nor: Quad Enable and (un)lock methods
Related show

Commit Message

Ambarus Tudor Nov. 7, 2019, 8:41 a.m. UTC
From: Tudor Ambarus <tudor.ambarus@microchip.com>

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>
---
 drivers/mtd/spi-nor/spi-nor.c | 58 +++++++++++++++++++++++++++++--------------
 1 file changed, 39 insertions(+), 19 deletions(-)

Comments

Vignesh Raghavendra Nov. 8, 2019, 4:03 p.m. UTC | #1
On 07-Nov-19 2:11 PM, Tudor.Ambarus@microchip.com wrote:
> From: Tudor Ambarus <tudor.ambarus@microchip.com>
> 
> 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>

Regards
Vignesh

> ---
>  drivers/mtd/spi-nor/spi-nor.c | 58 +++++++++++++++++++++++++++++--------------
>  1 file 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;
>  	}
>  
>

Patch
diff mbox series

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;
 	}