Bank/Extended addr commands are specific to particular
flash vendor so discover them based on the idocode0.
Assign the discovered bank commands to spi_flash members
so-that the bank read/write will use their specific operations.
Signed-off-by: Jagannadha Sutradharudu Teki <jaga...@xilinx.com>
---
Changes for v5:
- bank_read_cmd <= bank_cmd[0]
- bank_write_cmd <= bank_cmd[1]
Changes for v4:
- none
Changes for v3:
- none
Changes for v2:
- none
drivers/mtd/spi/spi_flash.c | 21 +++++++++++++++++++++
drivers/mtd/spi/spi_flash_internal.h | 14 ++++++++++++++
include/spi_flash.h | 4 ++++
3 files changed, 39 insertions(+)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 9ddd070..7e19953 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -304,6 +304,27 @@ int spi_flash_cmd_bankaddr_write(struct spi_flash *flash,
u8 bank_sel)
return 0;
}
+int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
+{
+ /* discover bank cmds */
+ switch (idcode0) {
+ case SPI_FLASH_SPANSION_IDCODE0:
+ flash->bank_read_cmd = CMD_BANKADDR_BRRD;
+ flash->bank_write_cmd = CMD_BANKADDR_BRWR;
+ break;
+ case SPI_FLASH_STMICRO_IDCODE0:
+ case SPI_FLASH_WINBOND_IDCODE0:
+ flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
+ flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
+ break;
+ default:
+ printf("SF: Unsupported bank commands %02x\n", idcode0);
+ return -1;
+ }
+
+ return 0;
+}
+
#ifdef CONFIG_OF_CONTROL
int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
{
diff --git a/drivers/mtd/spi/spi_flash_internal.h
b/drivers/mtd/spi/spi_flash_internal.h
index 772fef6..db6c444 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -28,6 +28,17 @@
#define CMD_ERASE_64K 0xd8
#define CMD_ERASE_CHIP 0xc7
+/* Manufacture ID's */
+#define SPI_FLASH_SPANSION_IDCODE0 0x01
+#define SPI_FLASH_STMICRO_IDCODE0 0x20
+#define SPI_FLASH_WINBOND_IDCODE0 0xef
+
+/* Bank addr access commands */
+#define CMD_BANKADDR_BRWR 0x17
+#define CMD_BANKADDR_BRRD 0x16
+#define CMD_EXTNADDR_WREAR 0xC5
+#define CMD_EXTNADDR_RDEAR 0xC8
+
/* Common status */
#define STATUS_WIP 0x01
@@ -80,6 +91,9 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8
sr);
/* Program the bank address register */
int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel);
+/* Configure the BAR - discover the bank cmds */
+int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0);
+
/*
* Same as spi_flash_cmd_read() except it also claims/releases the SPI
* bus. Used as common part of the ->read() operation.
diff --git a/include/spi_flash.h b/include/spi_flash.h
index 3b6a44e..38587c2 100644
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -38,6 +38,10 @@ struct spi_flash {
u32 page_size;
/* Erase (sector) size */
u32 sector_size;
+ /* Bank read cmd */
+ u8 bank_read_cmd;
+ /* Bank write cmd */
+ u8 bank_write_cmd;
void *memory_map; /* Address of read-only SPI flash access */
int (*read)(struct spi_flash *flash, u32 offset,
--
1.8.3
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