diff mbox

[v2,03/10] mtd: spi-nor: unify read opcode variants with ST SPI FSM

Message ID 1397157664-24405-4-git-send-email-computersforpeace@gmail.com
State Superseded
Headers show

Commit Message

Brian Norris April 10, 2014, 7:20 p.m. UTC 
serial_flash_cmds.h defines our opcodes a little differently. Let's
borrow its naming, since it's borrowed from the SFDP standard, and it's
more extensible.

This prepares us for merging serial_flash_cmds.h and spi-nor.h opcode
listing.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Huang Shijie <b32955@freescale.com>
---
 drivers/mtd/spi-nor/spi-nor.c | 16 ++++++++--------
 include/linux/mtd/spi-nor.h   | 24 ++++++++++++++++--------
 2 files changed, 24 insertions(+), 16 deletions(-)

Comments

Huang Shijie April 11, 2014, 12:23 a.m. UTC | #1 
On Thu, Apr 10, 2014 at 12:20:57PM -0700, Brian Norris wrote:
> serial_flash_cmds.h defines our opcodes a little differently. Let's
> borrow its naming, since it's borrowed from the SFDP standard, and it's
> more extensible.
> 
> This prepares us for merging serial_flash_cmds.h and spi-nor.h opcode
> listing.
> 
> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
> Reviewed-by: Marek Vasut <marex@denx.de>
> Acked-by: Huang Shijie <b32955@freescale.com>
> ---
>  drivers/mtd/spi-nor/spi-nor.c | 16 ++++++++--------
>  include/linux/mtd/spi-nor.h   | 24 ++++++++++++++++--------
you still miss to change the fsl-quadspi.c.
I am not on office now, and i can not compile this patch.
did you meet any compiler error with this patch?


thanks
Huang Shijie
Brian Norris April 11, 2014, 4:26 a.m. UTC | #2 
On Fri, Apr 11, 2014 at 08:23:01AM +0800, Huang Shijie wrote:
> On Thu, Apr 10, 2014 at 12:20:57PM -0700, Brian Norris wrote:
> > serial_flash_cmds.h defines our opcodes a little differently. Let's
> > borrow its naming, since it's borrowed from the SFDP standard, and it's
> > more extensible.
> > 
> > This prepares us for merging serial_flash_cmds.h and spi-nor.h opcode
> > listing.
> > 
> > Signed-off-by: Brian Norris <computersforpeace@gmail.com>
> > Reviewed-by: Marek Vasut <marex@denx.de>
> > Acked-by: Huang Shijie <b32955@freescale.com>
> > ---
> >  drivers/mtd/spi-nor/spi-nor.c | 16 ++++++++--------
> >  include/linux/mtd/spi-nor.h   | 24 ++++++++++++++++--------
> you still miss to change the fsl-quadspi.c.
> I am not on office now, and i can not compile this patch.
> did you meet any compiler error with this patch?

Yes, I already noted on patch 8 that I squashed the changes to
fsl-quadspi.c into the wrong patch. So the whole series does compile,
but this particular patch is broken (i.e., the series is not
bisectable). Shame on me (again), and I will resend after taking another
proper look at things.

Brian
diff mbox

Patch

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 1716f3ce9949..d6f44d527701 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1014,16 +1014,16 @@  int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
 	/* Default commands */
 	switch (nor->flash_read) {
 	case SPI_NOR_QUAD:
-		nor->read_opcode = SPINOR_OP_QUAD_READ;
+		nor->read_opcode = SPINOR_OP_READ_1_1_4;
 		break;
 	case SPI_NOR_DUAL:
-		nor->read_opcode = SPINOR_OP_DUAL_READ;
+		nor->read_opcode = SPINOR_OP_READ_1_1_2;
 		break;
 	case SPI_NOR_FAST:
-		nor->read_opcode = SPINOR_OP_FAST_READ;
+		nor->read_opcode = SPINOR_OP_READ_FAST;
 		break;
 	case SPI_NOR_NORMAL:
-		nor->read_opcode = SPINOR_OP_NORM_READ;
+		nor->read_opcode = SPINOR_OP_READ;
 		break;
 	default:
 		dev_err(dev, "No Read opcode defined\n");
@@ -1041,16 +1041,16 @@  int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
 			/* Dedicated 4-byte command set */
 			switch (nor->flash_read) {
 			case SPI_NOR_QUAD:
-				nor->read_opcode = SPINOR_OP_QUAD_READ_4B;
+				nor->read_opcode = SPINOR_OP_READ4_1_1_4;
 				break;
 			case SPI_NOR_DUAL:
-				nor->read_opcode = SPINOR_OP_DUAL_READ_4B;
+				nor->read_opcode = SPINOR_OP_READ4_1_1_2;
 				break;
 			case SPI_NOR_FAST:
-				nor->read_opcode = SPINOR_OP_FAST_READ_4B;
+				nor->read_opcode = SPINOR_OP_READ4_FAST;
 				break;
 			case SPI_NOR_NORMAL:
-				nor->read_opcode = SPINOR_OP_NORM_READ_4B;
+				nor->read_opcode = SPINOR_OP_READ4;
 				break;
 			}
 			nor->program_opcode = SPINOR_OP_PP_4B;
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index f1fe1a6659a3..53241842a7ab 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -10,14 +10,22 @@ 
 #ifndef __LINUX_MTD_SPI_NOR_H
 #define __LINUX_MTD_SPI_NOR_H
 
+/*
+ * Note on opcode nomenclature: some opcodes have a format like
+ * SPINOR_OP_FUNCTION{4,}_x_y_z. The numbers x, y, and z stand for the number
+ * of I/O lines used for the opcode, address, and data (respectively). The
+ * FUNCTION has an optional suffix of '4', to represent an opcode which
+ * requires a 4-byte (32-bit) address.
+ */
+
 /* Flash opcodes. */
 #define SPINOR_OP_WREN		0x06	/* Write enable */
 #define SPINOR_OP_RDSR		0x05	/* Read status register */
 #define SPINOR_OP_WRSR		0x01	/* Write status register 1 byte */
-#define SPINOR_OP_NORM_READ	0x03	/* Read data bytes (low frequency) */
-#define SPINOR_OP_FAST_READ	0x0b	/* Read data bytes (high frequency) */
-#define SPINOR_OP_DUAL_READ	0x3b	/* Read data bytes (Dual SPI) */
-#define SPINOR_OP_QUAD_READ	0x6b	/* Read data bytes (Quad SPI) */
+#define SPINOR_OP_READ		0x03	/* Read data bytes (low frequency) */
+#define SPINOR_OP_READ_FAST	0x0b	/* Read data bytes (high frequency) */
+#define SPINOR_OP_READ_1_1_2	0x3b	/* Read data bytes (Dual SPI) */
+#define SPINOR_OP_READ_1_1_4	0x6b	/* Read data bytes (Quad SPI) */
 #define SPINOR_OP_PP		0x02	/* Page program (up to 256 bytes) */
 #define SPINOR_OP_BE_4K		0x20	/* Erase 4KiB block */
 #define SPINOR_OP_BE_4K_PMC	0xd7	/* Erase 4KiB block on PMC chips */
@@ -28,10 +36,10 @@ 
 #define SPINOR_OP_RDCR		0x35	/* Read configuration register */
 
 /* 4-byte address opcodes - used on Spansion and some Macronix flashes. */
-#define SPINOR_OP_NORM_READ_4B	0x13	/* Read data bytes (low frequency) */
-#define SPINOR_OP_FAST_READ_4B	0x0c	/* Read data bytes (high frequency) */
-#define SPINOR_OP_DUAL_READ_4B	0x3c	/* Read data bytes (Dual SPI) */
-#define SPINOR_OP_QUAD_READ_4B	0x6c	/* Read data bytes (Quad SPI) */
+#define SPINOR_OP_READ4		0x13	/* Read data bytes (low frequency) */
+#define SPINOR_OP_READ4_FAST	0x0c	/* Read data bytes (high frequency) */
+#define SPINOR_OP_READ4_1_1_2	0x3c	/* Read data bytes (Dual SPI) */
+#define SPINOR_OP_READ4_1_1_4	0x6c	/* Read data bytes (Quad SPI) */
 #define SPINOR_OP_PP_4B		0x12	/* Page program (up to 256 bytes) */
 #define SPINOR_OP_SE_4B		0xdc	/* Sector erase (usually 64KiB) */