From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Date: Sat, 27 Apr 2019 06:29:00 +0000 (+0530)
Subject: spi: Add support for 4Byte addressing commands
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9ba61fc244f1f0d27c066dbe8bda1fc4942c3be3;p=thirdparty%2Fu-boot.git

spi: Add support for 4Byte addressing commands

Thsi patch adds support for 4-byte addressing Read, write
and erase commands.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
---

diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
index b684cad8dd2..34313722669 100644
--- a/drivers/mtd/spi/sf_internal.h
+++ b/drivers/mtd/spi/sf_internal.h
@@ -45,10 +45,12 @@ enum spi_nor_option_flags {
 #define CMD_ERASE_4K			0x20
 #define CMD_ERASE_CHIP			0xc7
 #define CMD_ERASE_64K			0xd8
+#define CMD_ERASE_64K_4B		0xdc
 
 /* Write commands */
 #define CMD_WRITE_STATUS		0x01
 #define CMD_PAGE_PROGRAM		0x02
+#define CMD_PAGE_PROGRAM_4B		0x12
 #define CMD_WRITE_DISABLE		0x04
 #define CMD_WRITE_ENABLE		0x06
 #define CMD_QUAD_PAGE_PROGRAM		0x32
@@ -64,6 +66,7 @@ enum spi_nor_option_flags {
 #define CMD_READ_QUAD_OUTPUT_FAST	0x6b
 #define CMD_READ_QUAD_IO_FAST		0xeb
 #define CMD_READ_OCTAL_OUTPUT_FAST	0x8B
+#define CMD_READ_OCTAL_OUTPUT_FAST_4B	0x7C
 #define CMD_READ_ID			0x9f
 #define CMD_READ_STATUS			0x05
 #define CMD_READ_STATUS1		0x35
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 179b817ab5b..e5b0e6d949d 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -1698,6 +1698,12 @@ int spi_flash_scan(struct spi_flash *flash)
 		flash->write_cmd = CMD_PAGE_PROGRAM;
 	}
 
+	if (spi->mode & SPI_RX_OCTAL && info->flags & RD_OCTAL &&
+	    flash->spi->bytemode) {
+		flash->read_cmd = CMD_READ_OCTAL_OUTPUT_FAST_4B;
+		flash->write_cmd = CMD_PAGE_PROGRAM_4B;
+		flash->erase_cmd = CMD_ERASE_64K_4B;
+	}
 
 	/* Set the quad enable bit - only for quad commands */
 	if ((flash->read_cmd == CMD_READ_QUAD_OUTPUT_FAST) ||
diff --git a/drivers/spi/cadence_qspi.c b/drivers/spi/cadence_qspi.c
index f02ad009b15..8db7e871ae1 100644
--- a/drivers/spi/cadence_qspi.c
+++ b/drivers/spi/cadence_qspi.c
@@ -150,6 +150,15 @@ static int cadence_spi_set_speed(struct udevice *bus, uint hz)
 	return 0;
 }
 
+static int cadence_spi_child_pre_probe(struct udevice *bus)
+{
+	struct spi_slave *slave = dev_get_parent_priv(bus);
+
+	slave->bytemode = SPI_4BYTE_MODE;
+
+	return 0;
+}
+
 static int cadence_spi_probe(struct udevice *bus)
 {
 	struct cadence_spi_platdata *plat = bus->platdata;
@@ -345,4 +354,5 @@ U_BOOT_DRIVER(cadence_spi) = {
 	.platdata_auto_alloc_size = sizeof(struct cadence_spi_platdata),
 	.priv_auto_alloc_size = sizeof(struct cadence_spi_priv),
 	.probe = cadence_spi_probe,
+	.child_pre_probe = cadence_spi_child_pre_probe,
 };