From: <Tudor.Ambarus@microchip.com>
To: <miquel.raynal@bootlin.com>, <richard@nod.at>, <vigneshr@ti.com>,
<boris.brezillon@collabora.com>
Cc: <linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
<Tudor.Ambarus@microchip.com>
Subject: [PATCH v3 29/32] mtd: spi-nor: Merge spansion Quad Enable methods
Date: Tue, 29 Oct 2019 11:17:35 +0000 [thread overview]
Message-ID: <20191029111615.3706-30-tudor.ambarus@microchip.com> (raw)
In-Reply-To: <20191029111615.3706-1-tudor.ambarus@microchip.com>
From: Tudor Ambarus <tudor.ambarus@microchip.com>
Merge
spansion_no_read_cr_quad_enable()
spansion_read_cr_quad_enable()
into
spi_nor_sr2_bit1_quad_enable().
Reduce code duplication by introducing spi_nor_write_16bit_cr_and_check().
The Configuration Register contains bits that can be updated in future:
FREEZE, CMP. Provide a generic method that allows updating all bits
of the Configuration Register.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
drivers/mtd/spi-nor/spi-nor.c | 165 +++++++++++++++++-------------------------
1 file changed, 68 insertions(+), 97 deletions(-)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 1f7ccd80b8ed..ab028afc503f 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1055,6 +1055,59 @@ static int spi_nor_write_16bit_sr_and_check(struct spi_nor *nor, u8 sr1)
}
/**
+ * spi_nor_write_16bit_cr_and_check() - Write the Status Register 1 and the
+ * Configuration Register in one shot. Ensure that the byte written in the
+ * Configuration Register match the received value, and that the 16-bit Write
+ * did not affect what was already in the Status Register 1.
+ * @nor: pointer to a 'struct spi_nor'.
+ * @cr: byte value to be written to the Configuration Register.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int spi_nor_write_16bit_cr_and_check(struct spi_nor *nor, u8 cr)
+{
+ int ret;
+ u8 *sr_cr = nor->bouncebuf;
+ u8 sr_written;
+
+ /* Keep the current value of the Status Register 1. */
+ ret = spi_nor_read_sr(nor, &sr_cr[0]);
+ if (ret)
+ return ret;
+
+ sr_cr[1] = cr;
+
+ 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[0]);
+ if (ret)
+ return ret;
+
+ if (sr_written != sr_cr[0]) {
+ dev_err(nor->dev, "SR1: Read back test failed\n");
+ return -EIO;
+ }
+
+ if (nor->flags & SNOR_F_NO_READ_CR)
+ return 0;
+
+ ret = spi_nor_read_cr(nor, &sr_cr[1]);
+ if (ret)
+ return ret;
+
+ if (cr != sr_cr[1]) {
+ dev_err(nor->dev, "CR: read back test failed\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
* spi_nor_write_sr_and_check() - Write the Status Register 1 and ensure that
* the byte written match the received value without affecting other bits in the
* Status Register 1 and 2.
@@ -2051,111 +2104,29 @@ static int macronix_quad_enable(struct spi_nor *nor)
}
/**
- * spansion_no_read_cr_quad_enable() - set QE bit in Configuration Register.
- * @nor: pointer to a 'struct spi_nor'
+ * spi_nor_sr2_bit1_quad_enable() - set the Quad Enable BIT(1) in the Status
+ * Register 2.
+ * @nor: pointer to a 'struct spi_nor'.
*
- * Set the Quad Enable (QE) bit in the Configuration Register.
- * This function should be used with QSPI memories not supporting the Read
- * Configuration Register (35h) instruction.
- *
- * bit 1 of the Configuration Register is the QE bit for Spansion like QSPI
- * memories.
+ * Bit 1 of the Status Register 2 is the QE bit for Spansion like QSPI memories.
*
* Return: 0 on success, -errno otherwise.
*/
-static int spansion_no_read_cr_quad_enable(struct spi_nor *nor)
+static int spi_nor_sr2_bit1_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[0]);
- if (ret)
- return ret;
-
- sr_cr[1] = SR2_QUAD_EN_BIT1;
-
- 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[0]);
- if (ret)
- return ret;
-
- if (sr_cr[0] != sr_written) {
- dev_err(nor->dev, "SR1: Read back test failed\n");
- return -EIO;
- }
-
- return 0;
-}
-
-/**
- * spansion_read_cr_quad_enable() - set QE bit in Configuration Register.
- * @nor: pointer to a 'struct spi_nor'
- *
- * Set the Quad Enable (QE) bit in the Configuration Register.
- * This function should be used with QSPI memories supporting the Read
- * Configuration Register (35h) instruction.
- *
- * bit 1 of the Configuration Register is the QE bit for Spansion like QSPI
- * memories.
- *
- * Return: 0 on success, -errno otherwise.
- */
-static int spansion_read_cr_quad_enable(struct spi_nor *nor)
-{
- u8 *sr_cr = nor->bouncebuf;
- int ret;
- u8 sr_written;
+ if (nor->flags & SNOR_F_NO_READ_CR)
+ return spi_nor_write_16bit_cr_and_check(nor, SR2_QUAD_EN_BIT1);
- /* Check current Quad Enable bit value. */
- ret = spi_nor_read_cr(nor, &sr_cr[1]);
+ ret = spi_nor_read_cr(nor, &nor->bouncebuf[0]);
if (ret)
return ret;
- if (sr_cr[1] & SR2_QUAD_EN_BIT1)
+ if (nor->bouncebuf[0] & SR2_QUAD_EN_BIT1)
return 0;
- sr_cr[1] |= SR2_QUAD_EN_BIT1;
-
- /* Keep the current value of the Status Register. */
- ret = spi_nor_read_sr(nor, &sr_cr[0]);
- if (ret)
- return ret;
-
- 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[0]);
- if (ret)
- return ret;
-
- if (sr_written != sr_cr[0]) {
- dev_err(nor->dev, "SR1: 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] != sr_written) {
- dev_err(nor->dev, "SR2: Read back test failed\n");
- return -EIO;
- }
-
- return 0;
+ return spi_nor_write_16bit_cr_and_check(nor, nor->bouncebuf[0]);
}
/**
@@ -2235,7 +2206,7 @@ static int spi_nor_clear_sr_bp(struct spi_nor *nor)
*
* Read-modify-write function that clears the Block Protection bits from the
* Status Register without affecting other bits. The function is tightly
- * coupled with the spansion_read_cr_quad_enable() function. Both assume that
+ * coupled with the spi_nor_sr2_bit1_quad_enable() function. Both assume that
* the Write Register with 16 bits, together with the Read Configuration
* Register (35h) instructions are supported.
*
@@ -3753,7 +3724,7 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor,
* supported.
*/
nor->flags |= SNOR_F_HAS_16BIT_SR | SNOR_F_NO_READ_CR;
- params->quad_enable = spansion_no_read_cr_quad_enable;
+ params->quad_enable = spi_nor_sr2_bit1_quad_enable;
break;
case BFPT_DWORD15_QER_SR1_BIT6:
@@ -3775,7 +3746,7 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor,
*/
nor->flags |= SNOR_F_HAS_16BIT_SR;
- params->quad_enable = spansion_read_cr_quad_enable;
+ params->quad_enable = spi_nor_sr2_bit1_quad_enable;
break;
default:
@@ -4738,7 +4709,7 @@ static void spi_nor_info_init_params(struct spi_nor *nor)
u8 i, erase_mask;
/* Initialize legacy flash parameters and settings. */
- params->quad_enable = spansion_read_cr_quad_enable;
+ params->quad_enable = spi_nor_sr2_bit1_quad_enable;
params->set_4byte = spansion_set_4byte;
params->setup = spi_nor_default_setup;
/* Default to 16-bit Write Status (01h) Command */
@@ -4955,7 +4926,7 @@ static int spi_nor_init(struct spi_nor *nor)
int err;
if (nor->clear_sr_bp) {
- if (nor->params.quad_enable == spansion_read_cr_quad_enable)
+ if (nor->params.quad_enable == spi_nor_sr2_bit1_quad_enable)
nor->clear_sr_bp = spi_nor_spansion_clear_sr_bp;
err = nor->clear_sr_bp(nor);
--
2.9.5
next prev parent reply other threads:[~2019-10-29 11:18 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-29 11:16 [PATCH v3 00/32] mtd: spi-nor: Quad Enable and (un)lock methods Tudor.Ambarus
2019-10-29 11:16 ` [PATCH v3 01/32] mtd: spi-nor: Prepend spi_nor_ to all Reg Ops methods Tudor.Ambarus
2019-10-31 10:34 ` Boris Brezillon
2019-11-02 10:34 ` Tudor.Ambarus
2019-10-29 11:16 ` [PATCH v3 02/32] mtd: spi-nor: Drop duplicated new line Tudor.Ambarus
2019-10-31 10:34 ` Boris Brezillon
2019-11-02 10:34 ` Tudor.Ambarus
2019-10-29 11:16 ` [PATCH v3 03/32] mtd: spi-nor: Group all Reg Ops to avoid forward declarations Tudor.Ambarus
2019-10-31 10:35 ` Boris Brezillon
2019-11-02 10:35 ` Tudor.Ambarus
2019-10-29 11:16 ` [PATCH v3 04/32] mtd: spi-nor: Stop compare with negative in Reg Ops methods Tudor.Ambarus
2019-10-31 10:36 ` Boris Brezillon
2019-11-02 10:36 ` Tudor.Ambarus
2019-10-29 11:16 ` [PATCH v3 05/32] mtd: spi-nor: Drop explicit cast to int to already int value Tudor.Ambarus
2019-10-31 10:36 ` Boris Brezillon
2019-11-02 10:37 ` Tudor.Ambarus
2019-10-29 11:16 ` [PATCH v3 06/32] mtd: spi-nor: Use dev_err() instead of pr_err() Tudor.Ambarus
2019-10-31 10:43 ` Boris Brezillon
2019-11-02 10:38 ` Tudor.Ambarus
2019-10-29 11:16 ` [PATCH v3 07/32] mtd: spi-nor: Don't overwrite errno from Reg Ops Tudor.Ambarus
2019-10-31 10:48 ` Boris Brezillon
2019-11-02 10:39 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 08/32] mtd: spi-nor: Pointer parameter for SR in spi_nor_read_sr() Tudor.Ambarus
2019-10-31 10:51 ` Boris Brezillon
2019-11-02 10:42 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 09/32] mtd: spi-nor: Pointer parameter for FSR in spi_nor_read_fsr() Tudor.Ambarus
2019-10-31 10:53 ` Boris Brezillon
2019-11-02 10:44 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 10/32] mtd: spi-nor: Pointer parameter for CR in spi_nor_read_cr() Tudor.Ambarus
2019-10-31 10:58 ` Boris Brezillon
2019-10-31 14:26 ` Tudor.Ambarus
2019-11-02 10:45 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 11/32] mtd: spi-nor: Drop redundant error reports in Reg Ops callers Tudor.Ambarus
2019-10-31 10:59 ` Boris Brezillon
2019-11-02 10:46 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 12/32] mtd: spi-nor: Void return type for spi_nor_clear_sr/fsr() Tudor.Ambarus
2019-10-31 11:02 ` Boris Brezillon
2019-10-29 11:17 ` [PATCH v3 13/32] mtd: spi-nor: Print error messages inside Reg Ops methods Tudor.Ambarus
2019-10-31 11:05 ` Boris Brezillon
2019-10-31 14:18 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 14/32] mtd: spi-nor: Fix retlen handling in sst_write() Tudor.Ambarus
2019-10-31 11:12 ` Boris Brezillon
2019-11-02 10:47 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 15/32] mtd: spi-nor: Check for errors after each Register Operation Tudor.Ambarus
2019-10-31 6:57 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 16/32] mtd: spi-nor: Rename label as it is no longer generic Tudor.Ambarus
2019-10-31 11:14 ` Boris Brezillon
2019-10-29 11:17 ` [PATCH v3 17/32] mtd: spi-nor: Move the WE and wait calls inside Write SR methods Tudor.Ambarus
2019-10-31 11:15 ` Boris Brezillon
2019-10-29 11:17 ` [PATCH v3 18/32] mtd: spi-nor: Constify data to write to the Status Register Tudor.Ambarus
2019-10-31 11:16 ` Boris Brezillon
2019-11-02 10:48 ` Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 19/32] mtd: spi-nor: Merge spi_nor_write_sr() and spi_nor_write_sr_cr() Tudor.Ambarus
2019-10-31 11:17 ` Boris Brezillon
2019-10-29 11:17 ` [PATCH v3 20/32] mtd: spi-nor: Describe all the Reg Ops Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 21/32] mtd: spi-nor: Drop spansion_quad_enable() Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 22/32] mtd: spi-nor: Fix errno on Quad Enable methods Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 23/32] mtd: spi-nor: Check all the bits written, not just the BP ones Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 24/32] mtd: spi-nor: Print error message when the read back test fails Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 25/32] mtd: spi-nor: Fix clearing of QE bit on lock()/unlock() Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 26/32] mtd: spi-nor: Extend the QE Read Back test to the entire SR byte Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 27/32] mtd: spi-nor: Extend the QE Read Back test to both SR1 and SR2 Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 28/32] mtd: spi-nor: Rename CR_QUAD_EN_SPAN to SR2_QUAD_EN_BIT1 Tudor.Ambarus
2019-10-29 11:17 ` Tudor.Ambarus [this message]
2019-10-29 11:17 ` [PATCH v3 30/32] mtd: spi-nor: Rename macronix_quad_enable to spi_nor_sr1_bit6_quad_enable Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 31/32] mtd: spi-nor: Prepend "spi_nor_" to "sr2_bit7_quad_enable" Tudor.Ambarus
2019-10-29 11:17 ` [PATCH v3 32/32] mtd: spi-nor: Rework the disabling of block write protection Tudor.Ambarus
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