summaryrefslogtreecommitdiffstats
path: root/drivers/mtd
diff options
context:
space:
mode:
authorLee Jones <lee.jones@linaro.org>2014-03-20 09:20:39 +0000
committerBrian Norris <computersforpeace@gmail.com>2014-03-20 04:17:15 -0700
commit5549fbd514b6002073437ee543deb89904045078 (patch)
tree317ea92048c4c66ee1959c1f110b741fa1dfc609 /drivers/mtd
parent1bd512b562dde92dae90036c4e6fd91f3870e44f (diff)
downloadop-kernel-dev-5549fbd514b6002073437ee543deb89904045078.zip
op-kernel-dev-5549fbd514b6002073437ee543deb89904045078.tar.gz
mtd: devices: Provide header for shared OPCODEs and SFDP commands
JEDEC have helped to standardise a great deal of the commands which can be issued to a Serial Flash devices. Many of the Serial Flash Discoverable Parameters (SFDP) commands are generic across devices. This patch provides a shared point where these commands can be defined. Suggested-by: Mark Brown <broonie@kernel.org> Acked-by Angus Clark <angus.clark@st.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/devices/serial_flash_cmds.h81
-rw-r--r--drivers/mtd/devices/st_spi_fsm.c2
2 files changed, 83 insertions, 0 deletions
diff --git a/drivers/mtd/devices/serial_flash_cmds.h b/drivers/mtd/devices/serial_flash_cmds.h
new file mode 100644
index 0000000..4f0c2c7c
--- /dev/null
+++ b/drivers/mtd/devices/serial_flash_cmds.h
@@ -0,0 +1,81 @@
+/*
+ * Generic/SFDP Flash Commands and Device Capabilities
+ *
+ * Copyright (C) 2013 Lee Jones <lee.jones@lianro.org>
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef _MTD_SERIAL_FLASH_CMDS_H
+#define _MTD_SERIAL_FLASH_CMDS_H
+
+/* Generic Flash Commands/OPCODEs */
+#define FLASH_CMD_WREN 0x06
+#define FLASH_CMD_WRDI 0x04
+#define FLASH_CMD_RDID 0x9f
+#define FLASH_CMD_RDSR 0x05
+#define FLASH_CMD_RDSR2 0x35
+#define FLASH_CMD_WRSR 0x01
+#define FLASH_CMD_SE_4K 0x20
+#define FLASH_CMD_SE_32K 0x52
+#define FLASH_CMD_SE 0xd8
+#define FLASH_CMD_CHIPERASE 0xc7
+#define FLASH_CMD_WRVCR 0x81
+#define FLASH_CMD_RDVCR 0x85
+
+/* JEDEC Standard - Serial Flash Discoverable Parmeters (SFDP) Commands */
+#define FLASH_CMD_READ 0x03 /* READ */
+#define FLASH_CMD_READ_FAST 0x0b /* FAST READ */
+#define FLASH_CMD_READ_1_1_2 0x3b /* DUAL OUTPUT READ */
+#define FLASH_CMD_READ_1_2_2 0xbb /* DUAL I/O READ */
+#define FLASH_CMD_READ_1_1_4 0x6b /* QUAD OUTPUT READ */
+#define FLASH_CMD_READ_1_4_4 0xeb /* QUAD I/O READ */
+
+#define FLASH_CMD_WRITE 0x02 /* PAGE PROGRAM */
+#define FLASH_CMD_WRITE_1_1_2 0xa2 /* DUAL INPUT PROGRAM */
+#define FLASH_CMD_WRITE_1_2_2 0xd2 /* DUAL INPUT EXT PROGRAM */
+#define FLASH_CMD_WRITE_1_1_4 0x32 /* QUAD INPUT PROGRAM */
+#define FLASH_CMD_WRITE_1_4_4 0x12 /* QUAD INPUT EXT PROGRAM */
+
+#define FLASH_CMD_EN4B_ADDR 0xb7 /* Enter 4-byte address mode */
+#define FLASH_CMD_EX4B_ADDR 0xe9 /* Exit 4-byte address mode */
+
+/* READ commands with 32-bit addressing */
+#define FLASH_CMD_READ4 0x13
+#define FLASH_CMD_READ4_FAST 0x0c
+#define FLASH_CMD_READ4_1_1_2 0x3c
+#define FLASH_CMD_READ4_1_2_2 0xbc
+#define FLASH_CMD_READ4_1_1_4 0x6c
+#define FLASH_CMD_READ4_1_4_4 0xec
+
+/* Configuration flags */
+#define FLASH_FLAG_SINGLE 0x000000ff
+#define FLASH_FLAG_READ_WRITE 0x00000001
+#define FLASH_FLAG_READ_FAST 0x00000002
+#define FLASH_FLAG_SE_4K 0x00000004
+#define FLASH_FLAG_SE_32K 0x00000008
+#define FLASH_FLAG_CE 0x00000010
+#define FLASH_FLAG_32BIT_ADDR 0x00000020
+#define FLASH_FLAG_RESET 0x00000040
+#define FLASH_FLAG_DYB_LOCKING 0x00000080
+
+#define FLASH_FLAG_DUAL 0x0000ff00
+#define FLASH_FLAG_READ_1_1_2 0x00000100
+#define FLASH_FLAG_READ_1_2_2 0x00000200
+#define FLASH_FLAG_READ_2_2_2 0x00000400
+#define FLASH_FLAG_WRITE_1_1_2 0x00001000
+#define FLASH_FLAG_WRITE_1_2_2 0x00002000
+#define FLASH_FLAG_WRITE_2_2_2 0x00004000
+
+#define FLASH_FLAG_QUAD 0x00ff0000
+#define FLASH_FLAG_READ_1_1_4 0x00010000
+#define FLASH_FLAG_READ_1_4_4 0x00020000
+#define FLASH_FLAG_READ_4_4_4 0x00040000
+#define FLASH_FLAG_WRITE_1_1_4 0x00100000
+#define FLASH_FLAG_WRITE_1_4_4 0x00200000
+#define FLASH_FLAG_WRITE_4_4_4 0x00400000
+
+#endif /* _MTD_SERIAL_FLASH_CMDS_H */
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 9fc0b19..1eea949 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -21,6 +21,8 @@
#include <linux/io.h>
#include <linux/of.h>
+#include "serial_flash_cmds.h"
+
/*
* FSM SPI Controller Registers
*/
OpenPOWER on IntegriCloud