From: Rayagonda Kokatanur
IPROC qspi driver supports both BSPI and MSPI modes.
Signed-off-by: Rayagonda Kokatanur
Signed-off-by: Bharat Gooty
Acked-by: Rayagonda Kokatanur
Signed-off-by: Roman Bacik
---
Changes in v12:
- fix typo FLASH_BIT to FLUSH_BIT
- return -EBUSY instead of -1 from bspi_disable
- replace (bytes+3)/4 with macro CEIL(bytes,4)
- replace constants with macros
- remove misleading comment
- remove debug instructions
- replace void __iomem * with fdt_addr_t
Changes in v11:
- fix condition for readl_poll_timeout in bspi_read_via_raf
Changes in v10:
- remove binding document
- use defined values for delays and timeouts
- replace timer-based logic with readl_poll_timeout
- format selected commands to single line
- remove unnecessary entries from struct bcmspi_priv
- simplify and move bspi strap override to bspi_set_flex_mode
Changes in v9:
- merge bspi_set_4byte_mode to bspi_set_flex_mode
- simplify bspi_set_flex_mode using data from spi_mem_op
- rename mode_4byte to bspi_4byte
- use BIT(x) istead of 1cmd.opcode for BSPI_CMD_AND_MODE_BYTE_REG
- move iproc_qspi.c to spi
Changes in v4:
- move iproc_qspi.c from spi to mtd/spi
- remove iproc_qspi.h
- rename IPROC_QSPI to SPI_FLASH_IPROC
Changes in v3:
- fix warning by including linux/delay.h
- change ofdata_to_platdata to of_to_plat
- change priv_auto_alloc_size to priv_auto
Changes in v2:
- remove include spi-nor.h
- define and use named BITs for writing register values
- remove bspi_set_4byte_mode() method
drivers/spi/Kconfig | 6 +
drivers/spi/Makefile | 1 +
drivers/spi/iproc_qspi.c | 576 +++
3 files changed, 583 insertions(+)
create mode 100644 drivers/spi/iproc_qspi.c
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index d07e9a28af82..faebc212753e 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -178,6 +178,12 @@ config ICH_SPI
access the SPI NOR flash on platforms embedding this Intel
ICH IP core.
+config IPROC_QSPI
+ bool "Broadcom iProc QSPI Flash Controller driver"
+ help
+ Enable Broadcom iProc QSPI Flash Controller driver.
+ This driver can be used to access the SPI NOR flash.
+
config KIRKWOOD_SPI
bool "Marvell Kirkwood SPI Driver"
help
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index d2f24bccefd3..869763187062 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_FSL_DSPI) += fsl_dspi.o
obj-$(CONFIG_FSL_ESPI) += fsl_espi.o
obj-$(CONFIG_SYNQUACER_SPI) += spi-synquacer.o
obj-$(CONFIG_ICH_SPI) += ich.o
+obj-$(CONFIG_IPROC_QSPI) += iproc_qspi.o
obj-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o
obj-$(CONFIG_MESON_SPIFC) += meson_spifc.o
obj-$(CONFIG_MPC8XX_SPI) += mpc8xx_spi.o
diff --git a/drivers/spi/iproc_qspi.c b/drivers/spi/iproc_qspi.c
new file mode 100644
index ..b5c274314b5b
--- /dev/null
+++ b/drivers/spi/iproc_qspi.c
@@ -0,0 +1,576 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020-2021 Broadcom
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+/* Delay required to change the mode of operation */
+#define BUSY_DELAY_US 1
+#define BUSY_TIMEOUT_US20
+#define DWORD_ALIGNED(a) (!(((ulong)(a)) & 3))
+
+/* Chip attributes */
+#define QSPI_AXI_CLK 17500
+#define SPBR_MIN 8U
+#define SPBR_MAX 255U
+#define NUM_CDRAM 16U
+
+#define CDRAM_PCS0 2
+#define CDRAM_CONT BIT(7)
+#define CDRAM_BITS_EN BIT(6)
+#define CDRAM_QUAD_MODEBIT(8)
+#define CDRAM_RBIT_INPUT BIT(10)
+#define MSPI_SPE BIT(6)
+#define MSPI_CONT_AFTER_CMDBIT(7)
+#define MSPI_MSTR BIT(7)
+
+/* Register fields */
+#define MSPI_SPCR0_MSB_BITS_8 0x0020
+#define BSPI_RAF_CONTROL_START_MASK0x0001
+#define BSPI_RAF_STATUS_SESSION_BUSY_MASK 0x0001
+#define BSPI_RAF_STATUS_FIFO_EMPTY_MASK0x0002
+#define BSPI_STRAP_OVERRIDE_DATA_QUAD_SHIFT3
+#define BSPI_STRAP_OVERRIDE_4BYTE_SHIFT2
+#define BSPI_STRAP_OVERRIDE_DATA_DUAL_SHIFT1
+#define BSPI_STRAP_OVERRIDE_SHIFT 0
+#define BSPI_BPC_DATA_SHIFT0
+#define BSPI_BPC_MODE_SHIFT8
+#define BSPI_BPC_ADDR_SHIFT16
+#define BSPI_BPC_CMD_SHIFT 24
+#define BSPI_BPP_ADDR_SHIFT16
+
+/* MSPI registers */
+#define
