[U-Boot] [PATCH v3] spi: ich: Configure SPI BIOS parameters
Stefan Roese
sr at denx.de
Thu Feb 9 09:26:55 UTC 2017
Without configuring these registers in the SPI controller, the Linux
MTD device driver is not able to correctly read/write to the SPI
NOR chip at all. In fact, the chip is not detected at all.
Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Bin Meng <bmeng.cn at gmail.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Jagan Teki <jteki at openedev.com>
---
v3:
- Moved defines from C-file into header file
- Changed some enum's into macros in ich.h for consistency
- Used these newly introduced defines
v2:
- Moved code into the ICH SPI driver as suggested by Simon and Bin
drivers/spi/ich.c | 18 ++++++++++++++++++
drivers/spi/ich.h | 45 ++++++++++++++++++++++++++++++++++++++-------
2 files changed, 56 insertions(+), 7 deletions(-)
diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index caf0103dc3..0418455a79 100644
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -111,6 +111,17 @@ static int ich9_can_do_33mhz(struct udevice *dev)
return speed == 1;
}
+/*
+ * Configure SPI controller so that the Linux MTD driver can fully
+ * access the SPI NOR chip
+ */
+static void spi_controller_config(struct ich_spi_priv *ctlr)
+{
+ ich_writew(ctlr, SPI_OPTYPE, ctlr->optype);
+ ich_writel(ctlr, SPI_OPMENU_LOWER, ctlr->opmenu);
+ ich_writel(ctlr, SPI_OPMENU_UPPER, ctlr->opmenu + sizeof(u32));
+}
+
static int ich_init_controller(struct udevice *dev,
struct ich_spi_platdata *plat,
struct ich_spi_priv *ctlr)
@@ -172,6 +183,13 @@ static int ich_init_controller(struct udevice *dev,
ich_set_bbar(ctlr, 0);
+ /*
+ * Configure the SPI-NOR controller in a way that the Linux
+ * MTD SPI-NOR device driver has full read-write access to
+ * the SPI-NOR chips
+ */
+ spi_controller_config(ctlr);
+
return 0;
}
diff --git a/drivers/spi/ich.h b/drivers/spi/ich.h
index bd0a820809..7282181247 100644
--- a/drivers/spi/ich.h
+++ b/drivers/spi/ich.h
@@ -102,13 +102,6 @@ enum {
};
enum {
- SPI_OPCODE_TYPE_READ_NO_ADDRESS = 0,
- SPI_OPCODE_TYPE_WRITE_NO_ADDRESS = 1,
- SPI_OPCODE_TYPE_READ_WITH_ADDRESS = 2,
- SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS = 3
-};
-
-enum {
ICH_MAX_CMD_LEN = 5,
};
@@ -127,6 +120,44 @@ struct spi_trans {
#define SPI_OPCODE_WREN 0x06
#define SPI_OPCODE_FAST_READ 0x0b
+#define SPI_OPCODE_TYPE_READ_NO_ADDRESS 0
+#define SPI_OPCODE_TYPE_WRITE_NO_ADDRESS 1
+#define SPI_OPCODE_TYPE_READ_WITH_ADDRESS 2
+#define SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS 3
+
+#define SPI_OPMENU_0 0x01 /* WRSR: Write Status Register */
+#define SPI_OPTYPE_0 SPI_OPCODE_TYPE_WRITE_NO_ADDRESS
+
+#define SPI_OPMENU_1 0x02 /* BYPR: Byte Program */
+#define SPI_OPTYPE_1 SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS
+
+#define SPI_OPMENU_2 0x03 /* READ: Read Data */
+#define SPI_OPTYPE_2 SPI_OPCODE_TYPE_READ_WITH_ADDRESS
+
+#define SPI_OPMENU_3 0x05 /* RDSR: Read Status Register */
+#define SPI_OPTYPE_3 SPI_OPCODE_TYPE_READ_NO_ADDRESS
+
+#define SPI_OPMENU_4 0x20 /* SE20: Sector Erase 0x20 */
+#define SPI_OPTYPE_4 SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS
+
+#define SPI_OPMENU_5 0x9f /* RDID: Read ID */
+#define SPI_OPTYPE_5 SPI_OPCODE_TYPE_READ_NO_ADDRESS
+
+#define SPI_OPMENU_6 0xd8 /* BED8: Block Erase 0xd8 */
+#define SPI_OPTYPE_6 SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS
+
+#define SPI_OPMENU_7 0x0b /* FAST: Fast Read */
+#define SPI_OPTYPE_7 SPI_OPCODE_TYPE_READ_WITH_ADDRESS
+
+#define SPI_OPTYPE ((SPI_OPTYPE_7 << 14) | (SPI_OPTYPE_6 << 12) | \
+ (SPI_OPTYPE_5 << 10) | (SPI_OPTYPE_4 << 8) | \
+ (SPI_OPTYPE_3 << 6) | (SPI_OPTYPE_2 << 4) | \
+ (SPI_OPTYPE_1 << 2) | (SPI_OPTYPE_0 << 0))
+#define SPI_OPMENU_UPPER ((SPI_OPMENU_7 << 24) | (SPI_OPMENU_6 << 16) | \
+ (SPI_OPMENU_5 << 8) | (SPI_OPMENU_4 << 0))
+#define SPI_OPMENU_LOWER ((SPI_OPMENU_3 << 24) | (SPI_OPMENU_2 << 16) | \
+ (SPI_OPMENU_1 << 8) | (SPI_OPMENU_0 << 0))
+
enum ich_version {
ICHV_7,
ICHV_9,
--
2.11.1
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