[U-Boot] [PATCH] spi: add NXP FlexSPI driver
Peng Fan
peng.fan at nxp.com
Wed Aug 7 03:17:36 UTC 2019
Add NXP Flexspi driver for i.MX8 Family usage.
Flexible Serial Peripheral Interface (FlexSPI) host controller
supports two SPI channels and up to 4 external devices.
Each channel supports Single/Dual/Quad/Octal mode data
transfer (1/2/4/8 bidirectional data lines).
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
drivers/spi/Kconfig | 19 +
drivers/spi/Makefile | 1 +
drivers/spi/fsl_fspi.c | 1291 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/spi/fsl_fspi.h | 170 +++++++
4 files changed, 1481 insertions(+)
create mode 100644 drivers/spi/fsl_fspi.c
create mode 100644 drivers/spi/fsl_fspi.h
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index f459c0a411..b71f289fb7 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -372,6 +372,25 @@ config FSL_ESPI
access the SPI interface and SPI NOR flash on platforms embedding
this Freescale eSPI IP core.
+config FSL_FSPI
+ bool "NXP FlexSPI driver"
+ help
+ Enable the NXP FlexSPI (FSPI) driver. This driver can be
+ used to access the SPI NOR flash on platforms embedding this
+ NXP IP core.
+
+if FSL_FSPI
+config FSPI_QUAD_SUPPORT
+ bool "FlexSPI QUAD support"
+ help
+ Enable Quad Read/write
+
+config FSPI_AHB
+ bool "FlexSPI AHB support"
+ help
+ Enable AHB buffer read
+endif
+
config FSL_QSPI
bool "Freescale QSPI driver"
imply SPI_FLASH_BAR
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index ae4f2958f8..867feb994b 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -30,6 +30,7 @@ obj-$(CONFIG_DESIGNWARE_SPI) += designware_spi.o
obj-$(CONFIG_EXYNOS_SPI) += exynos_spi.o
obj-$(CONFIG_FSL_DSPI) += fsl_dspi.o
obj-$(CONFIG_FSL_ESPI) += fsl_espi.o
+obj-$(CONFIG_FSL_FSPI) += fsl_fspi.o
obj-$(CONFIG_FSL_QSPI) += fsl_qspi.o
obj-$(CONFIG_ICH_SPI) += ich.o
obj-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o
diff --git a/drivers/spi/fsl_fspi.c b/drivers/spi/fsl_fspi.c
new file mode 100644
index 0000000000..7f9d2f0b45
--- /dev/null
+++ b/drivers/spi/fsl_fspi.c
@@ -0,0 +1,1291 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2019 NXP
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <clk.h>
+#include <dm.h>
+#include <errno.h>
+#include <linux/sizes.h>
+#include <malloc.h>
+#include <spi.h>
+#include <watchdog.h>
+
+#include "fsl_fspi.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define RX_BUFFER_SIZE 0x200
+#define TX_BUFFER_SIZE 0x400
+#define AHB_BUFFER_SIZE 0x800
+
+/* SEQID */
+#define SEQID_READ 0
+#define SEQID_WREN 1
+#define SEQID_FAST_READ 2
+#define SEQID_RDSR 3
+#define SEQID_SE 4
+#define SEQID_CHIP_ERASE 5
+#define SEQID_PP 6
+#define SEQID_RDID 7
+#define SEQID_BE_4K 8
+#ifdef CONFIG_SPI_FLASH_BAR
+#define SEQID_BRRD 9
+#define SEQID_BRWR 10
+#define SEQID_RDEAR 11
+#define SEQID_WREAR 12
+#endif
+#define SEQID_RDEVCR 13
+#define SEQID_WREVCR 14
+#define SEQID_QUAD_OUTPUT 15
+#define SEQID_RDFSR 16
+#define SEQID_EN4B 17
+#define SEQID_CRFSR 18
+
+/* FSPI CMD */
+#define FSPI_CMD_PP 0x02 /* Page program (up to 256 bytes) */
+#define FSPI_CMD_RDSR 0x05 /* Read status register */
+#define FSPI_CMD_WREN 0x06 /* Write enable */
+#define FSPI_CMD_FAST_READ 0x0b /* Read data bytes (high frequency) */
+#define FSPI_CMD_READ 0x03 /* Read data bytes */
+#define FSPI_CMD_BE_4K 0x20 /* 4K erase */
+#define FSPI_CMD_CHIP_ERASE 0xc7 /* Erase whole flash chip */
+#define FSPI_CMD_SE 0xd8 /* Sector erase (usually 64KiB) */
+#define FSPI_CMD_RDID 0x9f /* Read JEDEC ID */
+
+/* Used for Micron, winbond and Macronix flashes */
+#define FSPI_CMD_WREAR 0xc5 /* EAR register write */
+#define FSPI_CMD_RDEAR 0xc8 /* EAR reigster read */
+
+/* Used for Spansion flashes only. */
+#define FSPI_CMD_BRRD 0x16 /* Bank register read */
+#define FSPI_CMD_BRWR 0x17 /* Bank register write */
+
+/* 4-byte address FSPI CMD - used on Spansion and some Macronix flashes */
+#define FSPI_CMD_FAST_READ_4B 0x0c /* Read data bytes (high frequency) */
+#define FSPI_CMD_PP_4B 0x12 /* Page program (up to 256 bytes) */
+#define FSPI_CMD_SE_4B 0xdc /* Sector erase (usually 64KiB) */
+#define FSPI_CMD_BE_4K_4B 0x21 /* 4K erase */
+
+#define FSPI_CMD_RD_EVCR 0x65 /* Read EVCR register */
+#define FSPI_CMD_WR_EVCR 0x61 /* Write EVCR register */
+
+#define FSPI_CMD_EN4B 0xB7
+
+/* 1-1-4 READ CMD */
+#define FSPI_CMD_QUAD_OUTPUT 0x6b
+#define FSPI_CMD_DDR_QUAD_OUTPUT 0x6d
+
+/* read flag status register */
+#define FSPI_CMD_RDFSR 0x70
+#define FSPI_CMD_CRFSR 0x50
+
+/* fsl_fspi_platdata flags */
+#define FSPI_FLAG_REGMAP_ENDIAN_BIG BIT(0)
+
+/* default SCK frequency, unit: HZ */
+#define FSL_FSPI_DEFAULT_SCK_FREQ 50000000
+
+/* FSPI max chipselect signals number */
+#define FSL_FSPI_MAX_CHIPSELECT_NUM 4
+
+#define FSPI_AHB_BASE_ADDR 0x08000000
+
+/**
+ * struct fsl_fspi_platdata - platform data for NXP FSPI
+ *
+ * @flags: Flags for FSPI FSPI_FLAG_...
+ * @speed_hz: Default SCK frequency
+ * @reg_base: Base address of FSPI registers
+ * @amba_base: Base address of FSPI memory mapping
+ * @amba_total_size: size of FSPI memory mapping
+ * @flash_num: Number of active slave devices
+ * @num_chipselect: Number of FSPI chipselect signals
+ */
+struct fsl_fspi_platdata {
+ u32 flags;
+ u32 speed_hz;
+ u32 reg_base;
+ u32 amba_base;
+ u32 amba_total_size;
+ u32 flash_num;
+ u32 num_chipselect;
+};
+
+/**
+ * struct fsl_fspi_priv - private data for NXP FSPI
+ *
+ * @flags: Flags for FSPI FSPI_FLAG_...
+ * @bus_clk: FSPI input clk frequency
+ * @speed_hz: Default SCK frequency
+ * @cur_seqid: current LUT table sequence id
+ * @sf_addr: flash access offset
+ * @amba_base: Base address of FSPI memory mapping of every CS
+ * @amba_total_size: size of FSPI memory mapping
+ * @cur_amba_base: Base address of FSPI memory mapping of current CS
+ * @flash_num: Number of active slave devices
+ * @num_chipselect: Number of FSPI chipselect signals
+ * @regs: Point to FSPI register structure for I/O access
+ */
+struct fsl_fspi_priv {
+ u32 flags;
+ u32 bus_clk;
+ u32 speed_hz;
+ u32 cur_seqid;
+ u32 sf_addr;
+ u32 amba_base[FSL_FSPI_MAX_CHIPSELECT_NUM];
+ u32 amba_total_size;
+ u32 cur_amba_base;
+ u32 flash_num;
+ u32 num_chipselect;
+ struct fsl_fspi_regs *regs;
+};
+
+static u32 fspi_read32(u32 flags, u32 *addr)
+{
+ return flags & FSPI_FLAG_REGMAP_ENDIAN_BIG ?
+ in_be32(addr) : in_le32(addr);
+}
+
+static void fspi_write32(u32 flags, u32 *addr, u32 val)
+{
+ flags & FSPI_FLAG_REGMAP_ENDIAN_BIG ?
+ out_be32(addr, val) : out_le32(addr, val);
+}
+
+static void fspi_set_lut(struct fsl_fspi_priv *priv)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 lut_base;
+
+ /* Unlock the LUT */
+ fspi_write32(priv->flags, ®s->lutkey, FLEXSPI_LUTKEY_VALUE);
+ fspi_write32(priv->flags, ®s->lutcr, FLEXSPI_LCKER_UNLOCK);
+
+ /* READ */
+ lut_base = SEQID_READ * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_READ) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1],
+ OPRND0(0) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_READ));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Write Enable */
+ lut_base = SEQID_WREN * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_WREN) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Fast Read */
+ lut_base = SEQID_FAST_READ * 4;
+#ifdef CONFIG_SPI_FLASH_BAR
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_FAST_READ) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+#else
+ if (FSL_FSPI_FLASH_SIZE <= SZ_16M)
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_FAST_READ) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ else
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_FAST_READ_4B) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) |
+ OPRND1(ADDR32BIT) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_ADDR));
+#endif
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1],
+ OPRND0(8) | PAD0(LUT_PAD1) | INSTR0(LUT_DUMMY) |
+ OPRND1(0) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_READ));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Read Status */
+ lut_base = SEQID_RDSR * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_RDSR) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(1) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_READ));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Erase a sector */
+ lut_base = SEQID_SE * 4;
+#ifdef CONFIG_SPI_FLASH_BAR
+ fspi_write32(priv->flags, ®s->lut[lut_base], OPRND0(FSPI_CMD_SE) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+#else
+ if (FSL_FSPI_FLASH_SIZE <= SZ_16M)
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_SE) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ else
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_SE_4B) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+#endif
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Erase the whole chip */
+ lut_base = SEQID_CHIP_ERASE * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_CHIP_ERASE) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_CMD));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Page Program */
+ lut_base = SEQID_PP * 4;
+#ifdef CONFIG_SPI_FLASH_BAR
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_PP) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_ADDR));
+#else
+ if (FSL_FSPI_FLASH_SIZE <= SZ_16M)
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_PP) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ else
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_PP_4B) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+#endif
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1],
+ OPRND0(0) |
+ PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* READ ID */
+ lut_base = SEQID_RDID * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_RDID) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(8) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_READ));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* SUB SECTOR 4K ERASE */
+ lut_base = SEQID_BE_4K * 4;
+#ifdef CONFIG_SPI_FLASH_BAR
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_BE_4K) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_ADDR));
+#else
+ if (FSL_FSPI_FLASH_SIZE <= SZ_16M)
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_BE_4K) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+ else
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_BE_4K_4B) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
+#endif
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+#ifdef CONFIG_SPI_FLASH_BAR
+ /*
+ * BRRD BRWR RDEAR WREAR are all supported, because it is hard to
+ * dynamically check whether to set BRRD BRWR or RDEAR WREAR during
+ * initialization.
+ */
+ lut_base = SEQID_BRRD * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_BRRD) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(1) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_READ));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ lut_base = SEQID_BRWR * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_BRWR) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(1) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_WRITE));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ lut_base = SEQID_RDEAR * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_RDEAR) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(1) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_READ));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ lut_base = SEQID_WREAR * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_WREAR) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(1) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_WRITE));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+#endif
+ lut_base = SEQID_RDEVCR * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_RD_EVCR) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ lut_base = SEQID_WREVCR * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_WR_EVCR) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+#ifdef CONFIG_FSPI_QUAD_SUPPORT
+ /* QUAD OUTPUT READ */
+ lut_base = SEQID_QUAD_OUTPUT * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_DDR_QUAD_OUTPUT) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
+ PAD1(LUT_PAD1) | INSTR1(LUT_ADDR_DDR));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1],
+ OPRND0(0xc) | PAD0(LUT_PAD4) |
+ INSTR0(LUT_DUMMY_DDR) | OPRND1(0) |
+ PAD1(LUT_PAD4) | INSTR1(LUT_READ_DDR));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+#endif
+
+ /* Read Flag Status */
+ lut_base = SEQID_RDFSR * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_RDFSR) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD) | OPRND1(1) | PAD1(LUT_PAD1) |
+ INSTR1(LUT_READ));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Enter 4 bytes address mode */
+ lut_base = SEQID_EN4B * 4;
+ fspi_write32(priv->flags, ®s->lut[lut_base],
+ OPRND0(FSPI_CMD_EN4B) | PAD0(LUT_PAD1) |
+ INSTR0(LUT_CMD));
+ fspi_write32(priv->flags, ®s->lut[lut_base + 1], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 2], 0);
+ fspi_write32(priv->flags, ®s->lut[lut_base + 3], 0);
+
+ /* Lock the LUT */
+ fspi_write32(priv->flags, ®s->lutkey, FLEXSPI_LUTKEY_VALUE);
+ fspi_write32(priv->flags, ®s->lutcr, FLEXSPI_LCKER_LOCK);
+}
+
+#if defined(CONFIG_FSI_AHB)
+/*
+ * If we have changed the content of the flash by writing or erasing,
+ * we need to invalidate the AHB buffer. If we do not do so, we may read out
+ * the wrong data. The spec tells us reset the AHB domain and Serial Flash
+ * domain at the same time.
+ */
+static inline void fspi_ahb_invalid(struct fsl_fspi_priv *priv)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 reg;
+
+ reg = fspi_read32(priv->flags, ®s->mcr0);
+ reg |= FLEXSPI_MCR0_SWRST_MASK;
+ fspi_write32(priv->flags, ®s->mcr0, reg);
+
+ while ((fspi_read32(priv->flags, ®s->mcr0) & 1))
+ ;
+}
+
+/* Read out the data from the AHB buffer. */
+static inline void fspi_ahb_read(struct fsl_fspi_priv *priv, u8 *rxbuf,
+ int len)
+{
+ /* Read out the data directly from the AHB buffer. */
+ memcpy(rxbuf, (u8 *)(FSPI_AHB_BASE_ADDR +
+ (uintptr_t)priv->sf_addr), len);
+}
+
+/*
+ * There are two different ways to read out the data from the flash:
+ * the "IP Command Read" and the "AHB Command Read".
+ *
+ * The IC guy suggests we use the "AHB Command Read" which is faster
+ * then the "IP Command Read". (What's more is that there is a bug in
+ * the "IP Command Read" in the Vybrid.)
+ *
+ * After we set up the registers for the "AHB Command Read", we can use
+ * the memcpy to read the data directly. A "missed" access to the buffer
+ * causes the controller to clear the buffer, and use the sequence pointed
+ * by the QUADSPI_BFGENCR[SEQID] to initiate a read from the flash.
+ */
+static void fspi_init_ahb_read(struct fsl_fspi_priv *priv)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ int i;
+
+ /* AHB configuration for access buffer 0~7 .*/
+ for (i = 0; i < 7; i++)
+ fspi_write32(priv->flags, ®s->ahbrxbuf0cr0 + i, 0);
+
+ /*
+ * Set ADATSZ with the maximum AHB buffer size to improve the read
+ * performance
+ */
+ fspi_write32(priv->flags, ®s->ahbrxbuf7cr0, AHB_BUFFER_SIZE / 8 |
+ FLEXSPI_AHBRXBUF0CR7_PREF_MASK);
+
+ fspi_write32(priv->flags, ®s->ahbcr, FLEXSPI_AHBCR_PREF_EN_MASK);
+ /*
+ * Set the default lut sequence for AHB Read.
+ * Parallel mode is disabled.
+ */
+#ifdef CONFIG_FSPI_QUAD_SUPPORT
+ fspi_write32(priv->flags, ®s->flsha1cr2, SEQID_QUAD_OUTPUT);
+#else
+ fspi_write32(priv->flags, ®s->flsha1cr2, SEQID_FAST_READ);
+#endif
+}
+#endif
+
+#ifdef CONFIG_SPI_FLASH_BAR
+/* Bank register read/write, EAR register read/write */
+static void fspi_op_rdbank(struct fsl_fspi_priv *priv, u8 *rxbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 data, seqid;
+
+ /* invalid the RXFIFO first */
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ if (priv->cur_seqid == FSPI_CMD_BRRD)
+ seqid = SEQID_BRRD;
+ else
+ seqid = SEQID_RDEAR;
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (seqid << FLEXSPI_IPCR1_SEQID_SHIFT) | len);
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr) &
+ FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ while (1) {
+ data = fspi_read32(priv->flags, ®s->rfdr[0]);
+ memcpy(rxbuf, &data, len);
+ break;
+ }
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPRXWA_MASK);
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+#endif
+
+static void fspi_op_rdevcr(struct fsl_fspi_priv *priv, u8 *rxbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 data;
+
+ /* invalid the RXFIFO first */
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_RDEVCR << FLEXSPI_IPCR1_SEQID_SHIFT) | len);
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ while (1) {
+ data = fspi_read32(priv->flags, ®s->rfdr[0]);
+ memcpy(rxbuf, &data, len);
+ break;
+ }
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPRXWA_MASK);
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+static void fspi_op_wrevcr(struct fsl_fspi_priv *priv, u8 *txbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+
+ /* invalid the TXFIFO first */
+ fspi_write32(priv->flags, ®s->iptxfcr, FLEXSPI_IPTXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ /* Wait for TXFIFO empty*/
+ while (!(fspi_read32(priv->flags, ®s->intr) &
+ FLEXSPI_INTR_IPTXWE_MASK))
+ ;
+
+ /* write the data to TXFIFO */
+ memcpy(®s->tfdr, txbuf, len);
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPTXWE_MASK);
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_WREVCR << FLEXSPI_IPCR1_SEQID_SHIFT) | len);
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr) &
+ FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ /* invalid the TXFIFO first */
+ fspi_write32(priv->flags, ®s->iptxfcr, FLEXSPI_IPTXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+static void fspi_op_rdid(struct fsl_fspi_priv *priv, u32 *rxbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 data, size;
+ int i;
+
+ /* invalid the RXFIFO first */
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_RDID << FLEXSPI_IPCR1_SEQID_SHIFT) | len);
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr) &
+ FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ i = 0;
+ while ((len <= RX_BUFFER_SIZE) && (len > 0)) {
+ data = fspi_read32(priv->flags, ®s->rfdr[i]);
+ size = (len < 4) ? len : 4;
+ memcpy(rxbuf, &data, size);
+ len -= size;
+ rxbuf++;
+ i++;
+ }
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPRXWA_MASK);
+
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+#ifndef CONFIG_FSI_AHB
+/* If not use AHB read, read data from ip interface */
+static void fspi_op_read(struct fsl_fspi_priv *priv, u32 *rxbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ int i, size, rx_size;
+ u32 to_or_from;
+
+ to_or_from = priv->sf_addr + priv->cur_amba_base;
+
+ /* invalid the RXFIFO */
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+
+ while (len > 0) {
+ WATCHDOG_RESET();
+
+ fspi_write32(priv->flags, ®s->ipcr0, to_or_from);
+
+ rx_size = (len > RX_BUFFER_SIZE) ?
+ RX_BUFFER_SIZE : len;
+
+#ifdef CONFIG_FSPI_QUAD_SUPPORT
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_QUAD_OUTPUT << FLEXSPI_IPCR1_SEQID_SHIFT) |
+ rx_size);
+#else
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_FAST_READ << FLEXSPI_IPCR1_SEQID_SHIFT) |
+ rx_size);
+#endif
+
+ to_or_from += rx_size;
+ len -= rx_size;
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ size = rx_size / 8;
+ for (i = 0; i < size; ++i) {
+ /* Wait for RXFIFO available*/
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPRXWA_MASK))
+ ;
+
+ memcpy(rxbuf, ®s->rfdr, 8);
+ rxbuf += 2;
+
+ /* move the FIFO pointer */
+ fspi_write32(priv->flags, ®s->intr,
+ FLEXSPI_INTR_IPRXWA_MASK);
+ }
+
+ size = rx_size % 8;
+
+ if (size) {
+ /* Wait for data filled*/
+ while (!(fspi_read32(priv->flags, ®s->iprxfsts)
+ & FLEXSPI_IPRXFSTS_FILL_MASK))
+ ;
+ memcpy(rxbuf, ®s->rfdr, size);
+ }
+
+ /* invalid the RXFIFO */
+ fspi_write32(priv->flags, ®s->iprxfcr,
+ FLEXSPI_IPRXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr,
+ FLEXSPI_INTR_IPCMDDONE_MASK);
+ }
+}
+#endif
+
+static void fspi_op_write(struct fsl_fspi_priv *priv, u8 *txbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 seqid;
+ int i, size, tx_size;
+ u32 to_or_from = 0;
+
+ /* invalid the TXFIFO first */
+ fspi_write32(priv->flags, ®s->iptxfcr, FLEXSPI_IPTXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_WREN << FLEXSPI_IPCR1_SEQID_SHIFT) | 0);
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+
+ /* invalid the TXFIFO first */
+ fspi_write32(priv->flags, ®s->iptxfcr, FLEXSPI_IPTXFCR_CLR_MASK);
+
+ to_or_from = priv->sf_addr + priv->cur_amba_base;
+
+ while (len > 0) {
+ /* Default is page programming */
+ seqid = SEQID_PP;
+#ifdef CONFIG_SPI_FLASH_BAR
+ if (priv->cur_seqid == FSPI_CMD_BRWR)
+ seqid = SEQID_BRWR;
+ else if (priv->cur_seqid == FSPI_CMD_WREAR)
+ seqid = SEQID_WREAR;
+#endif
+
+ fspi_write32(priv->flags, ®s->ipcr0, to_or_from);
+
+ tx_size = (len > TX_BUFFER_SIZE) ?
+ TX_BUFFER_SIZE : len;
+
+ to_or_from += tx_size;
+ len -= tx_size;
+
+ size = tx_size / 8;
+ for (i = 0; i < size; i++) {
+ /* Wait for TXFIFO empty*/
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPTXWE_MASK))
+ ;
+
+ memcpy(®s->tfdr, txbuf, 8);
+ txbuf += 8;
+ fspi_write32(priv->flags, ®s->intr,
+ FLEXSPI_INTR_IPTXWE_MASK);
+ }
+
+ size = tx_size % 8;
+ if (size) {
+ /* Wait for TXFIFO empty*/
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPTXWE_MASK))
+ ;
+
+ memcpy(®s->tfdr, txbuf, size);
+ fspi_write32(priv->flags, ®s->intr,
+ FLEXSPI_INTR_IPTXWE_MASK);
+ }
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (seqid << FLEXSPI_IPCR1_SEQID_SHIFT) | tx_size);
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr) &
+ FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ /* invalid the TXFIFO first */
+ fspi_write32(priv->flags, ®s->iptxfcr,
+ FLEXSPI_IPTXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr,
+ FLEXSPI_INTR_IPCMDDONE_MASK);
+ }
+}
+
+static void fspi_op_rdsr(struct fsl_fspi_priv *priv, void *rxbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 data;
+
+ /* invalid the RXFIFO first */
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_RDSR << FLEXSPI_IPCR1_SEQID_SHIFT) | len);
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ data = fspi_read32(priv->flags, ®s->rfdr[0]);
+ memcpy(rxbuf, &data, len);
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPRXWA_MASK);
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+static void fspi_op_rdfsr(struct fsl_fspi_priv *priv, void *rxbuf, u32 len)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 data;
+
+ /* invalid the RXFIFO first */
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_RDFSR << FLEXSPI_IPCR1_SEQID_SHIFT) | len);
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ data = fspi_read32(priv->flags, ®s->rfdr[0]);
+ memcpy(rxbuf, &data, len);
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPRXWA_MASK);
+ fspi_write32(priv->flags, ®s->iprxfcr, FLEXSPI_IPRXFCR_CLR_MASK);
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+static void fspi_op_erase(struct fsl_fspi_priv *priv)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+ u32 to_or_from = 0;
+
+ to_or_from = priv->sf_addr + priv->cur_amba_base;
+
+ fspi_write32(priv->flags, ®s->ipcr0, to_or_from);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_WREN << FLEXSPI_IPCR1_SEQID_SHIFT) | 0);
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+
+ if (priv->cur_seqid == FSPI_CMD_SE ||
+ priv->cur_seqid == FSPI_CMD_SE_4B) {
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_SE << FLEXSPI_IPCR1_SEQID_SHIFT) | 0);
+ } else if (priv->cur_seqid == FSPI_CMD_BE_4K ||
+ priv->cur_seqid == FSPI_CMD_BE_4K_4B) {
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_BE_4K << FLEXSPI_IPCR1_SEQID_SHIFT) | 0);
+ }
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+static void fspi_op_crfsr(struct fsl_fspi_priv *priv)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+
+ /* invalid the TXFIFO first */
+ fspi_write32(priv->flags, ®s->iptxfcr, FLEXSPI_IPTXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_CRFSR << FLEXSPI_IPCR1_SEQID_SHIFT) | 0);
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+static void fspi_op_enter_4bytes(struct fsl_fspi_priv *priv)
+{
+ struct fsl_fspi_regs *regs = priv->regs;
+
+ /* invalid the TXFIFO first */
+ fspi_write32(priv->flags, ®s->iptxfcr, FLEXSPI_IPTXFCR_CLR_MASK);
+
+ fspi_write32(priv->flags, ®s->ipcr0, priv->cur_amba_base);
+
+ fspi_write32(priv->flags, ®s->ipcr1,
+ (SEQID_EN4B << FLEXSPI_IPCR1_SEQID_SHIFT) | 0);
+
+ /* Trigger the command */
+ fspi_write32(priv->flags, ®s->ipcmd, 1);
+
+ /* Wait for command done */
+ while (!(fspi_read32(priv->flags, ®s->intr)
+ & FLEXSPI_INTR_IPCMDDONE_MASK))
+ ;
+
+ fspi_write32(priv->flags, ®s->intr, FLEXSPI_INTR_IPCMDDONE_MASK);
+}
+
+int fspi_xfer(struct fsl_fspi_priv *priv, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ u32 bytes = DIV_ROUND_UP(bitlen, 8);
+ static u32 wr_sfaddr;
+ u32 txbuf = 0;
+
+ if (dout) {
+ if (flags & SPI_XFER_BEGIN) {
+ priv->cur_seqid = *(u8 *)dout;
+ if (bytes > 1) {
+ int i, addr_bytes;
+
+ if (FSL_FSPI_FLASH_SIZE <= SZ_16M)
+ addr_bytes = 3;
+ else
+#ifdef CONFIG_SPI_FLASH_BAR
+ addr_bytes = 3;
+#else
+ addr_bytes = 4;
+#endif
+
+ dout = (u8 *)dout + 1;
+ txbuf = *(u8 *)dout;
+ for (i = 1; i < addr_bytes; i++) {
+ txbuf <<= 8;
+ txbuf |= *(((u8 *)dout) + i);
+ }
+
+ debug("seqid 0x%x addr 0x%x\n",
+ priv->cur_seqid, txbuf);
+ }
+ }
+
+ if (flags == SPI_XFER_END) {
+ if (priv->cur_seqid == FSPI_CMD_WR_EVCR) {
+ fspi_op_wrevcr(priv, (u8 *)dout, bytes);
+ return 0;
+ } else if ((priv->cur_seqid == FSPI_CMD_SE) ||
+ (priv->cur_seqid == FSPI_CMD_BE_4K) ||
+ (priv->cur_seqid == FSPI_CMD_SE_4B) ||
+ (priv->cur_seqid == FSPI_CMD_BE_4K_4B)) {
+ int i;
+
+ txbuf = *(u8 *)dout;
+ for (i = 1; i < bytes; i++) {
+ txbuf <<= 8;
+ txbuf |= *(((u8 *)dout) + i);
+ }
+
+ priv->sf_addr = txbuf;
+ fspi_op_erase(priv);
+#ifdef CONFIG_FSI_AHB
+ fspi_ahb_invalid(priv);
+#endif
+ return 0;
+ }
+ priv->sf_addr = wr_sfaddr;
+ fspi_op_write(priv, (u8 *)dout, bytes);
+ return 0;
+ }
+
+ if (priv->cur_seqid == FSPI_CMD_QUAD_OUTPUT ||
+ priv->cur_seqid == FSPI_CMD_FAST_READ ||
+ priv->cur_seqid == FSPI_CMD_FAST_READ_4B) {
+ priv->sf_addr = txbuf;
+ } else if (priv->cur_seqid == FSPI_CMD_PP ||
+ priv->cur_seqid == FSPI_CMD_PP_4B) {
+ wr_sfaddr = txbuf;
+ } else if (priv->cur_seqid == FSPI_CMD_WR_EVCR) {
+ wr_sfaddr = 0;
+ } else if ((priv->cur_seqid == FSPI_CMD_BRWR) ||
+ (priv->cur_seqid == FSPI_CMD_WREAR)) {
+#ifdef CONFIG_SPI_FLASH_BAR
+ wr_sfaddr = 0;
+#endif
+ } else if (priv->cur_seqid == FSPI_CMD_EN4B) {
+ fspi_op_enter_4bytes(priv);
+ } else if (priv->cur_seqid == FSPI_CMD_CRFSR) {
+ fspi_op_crfsr(priv);
+ }
+ }
+
+ if (din) {
+ if (priv->cur_seqid == FSPI_CMD_QUAD_OUTPUT ||
+ priv->cur_seqid == FSPI_CMD_FAST_READ ||
+ priv->cur_seqid == FSPI_CMD_FAST_READ_4B) {
+#ifdef CONFIG_FSI_AHB
+ fspi_ahb_read(priv, din, bytes);
+#else
+ fspi_op_read(priv, din, bytes);
+#endif
+ } else if (priv->cur_seqid == FSPI_CMD_RDID)
+ fspi_op_rdid(priv, din, bytes);
+ else if (priv->cur_seqid == FSPI_CMD_RDSR)
+ fspi_op_rdsr(priv, din, bytes);
+ else if (priv->cur_seqid == FSPI_CMD_RDFSR)
+ fspi_op_rdfsr(priv, din, bytes);
+ else if (priv->cur_seqid == FSPI_CMD_RD_EVCR)
+ fspi_op_rdevcr(priv, din, bytes);
+#ifdef CONFIG_SPI_FLASH_BAR
+ else if (priv->cur_seqid == FSPI_CMD_BRRD ||
+ priv->cur_seqid == FSPI_CMD_RDEAR) {
+ priv->sf_addr = 0;
+ fspi_op_rdbank(priv, din, bytes);
+ }
+#endif
+ }
+
+#ifdef CONFIG_FSI_AHB
+ if (priv->cur_seqid == FSPI_CMD_SE ||
+ priv->cur_seqid == FSPI_CMD_SE_4B ||
+ priv->cur_seqid == FSPI_CMD_PP ||
+ priv->cur_seqid == FSPI_CMD_PP_4B ||
+ priv->cur_seqid == FSPI_CMD_BE_4K ||
+ priv->cur_seqid == FSPI_CMD_BE_4K_4B ||
+ priv->cur_seqid == FSPI_CMD_WREAR ||
+ priv->cur_seqid == FSPI_CMD_BRWR)
+ fspi_ahb_invalid(priv);
+#endif
+
+ return 0;
+}
+
+void fspi_module_disable(struct fsl_fspi_priv *priv, u8 disable)
+{
+ u32 mcr_val;
+
+ mcr_val = fspi_read32(priv->flags, &priv->regs->mcr0);
+ if (disable)
+ mcr_val |= FLEXSPI_MCR0_MDIS_MASK;
+ else
+ mcr_val &= ~FLEXSPI_MCR0_MDIS_MASK;
+ fspi_write32(priv->flags, &priv->regs->mcr0, mcr_val);
+}
+
+__weak void init_clk_fspi(int index)
+{
+}
+
+static int fsl_fspi_child_pre_probe(struct udevice *dev)
+{
+ struct spi_slave *slave = dev_get_parent_priv(dev);
+
+ slave->max_write_size = TX_BUFFER_SIZE;
+
+#ifdef CONFIG_FSPI_QUAD_SUPPORT
+ slave->mode |= SPI_RX_QUAD;
+#endif
+
+ return 0;
+}
+
+static int fsl_fspi_probe(struct udevice *bus)
+{
+ u32 total_size;
+ struct fsl_fspi_platdata *plat = dev_get_platdata(bus);
+ struct fsl_fspi_priv *priv = dev_get_priv(bus);
+ struct dm_spi_bus *dm_spi_bus;
+
+ if (CONFIG_IS_ENABLED(CLK)) {
+ /* Assigned clock already set clock */
+ struct clk fspi_clk;
+ int ret;
+
+ ret = clk_get_by_name(bus, "fspi", &fspi_clk);
+ if (ret < 0) {
+ printf("Can't get fspi clk: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_enable(&fspi_clk);
+ if (ret < 0) {
+ printf("Can't enable fspi clk: %d\n", ret);
+ return ret;
+ }
+ } else {
+ init_clk_fspi(bus->seq);
+ }
+ dm_spi_bus = bus->uclass_priv;
+
+ dm_spi_bus->max_hz = plat->speed_hz;
+
+ priv->regs = (struct fsl_fspi_regs *)(uintptr_t)plat->reg_base;
+ priv->flags = plat->flags;
+
+ priv->speed_hz = plat->speed_hz;
+ priv->amba_base[0] = plat->amba_base;
+ priv->amba_total_size = plat->amba_total_size;
+ priv->flash_num = plat->flash_num;
+ priv->num_chipselect = plat->num_chipselect;
+
+ fspi_write32(priv->flags, &priv->regs->mcr0, FLEXSPI_MCR0_SWRST_MASK);
+ do {
+ udelay(1);
+ } while (0x1 & fspi_read32(priv->flags, &priv->regs->mcr0));
+
+ /* Disable the module */
+ fspi_module_disable(priv, 1);
+
+ /* Enable the module and set to proper value*/
+#ifdef CONFIG_FSPI_DQS_LOOPBACK
+ fspi_write32(priv->flags, &priv->regs->mcr0, 0xFFFF0010);
+#else
+ fspi_write32(priv->flags, &priv->regs->mcr0, 0xFFFF0000);
+#endif
+
+ /* Reset the DLL register to default value */
+ fspi_write32(priv->flags, &priv->regs->dllacr, 0x0100);
+ fspi_write32(priv->flags, &priv->regs->dllbcr, 0x0100);
+
+ /* Flash Size in KByte */
+ total_size = FSL_FSPI_FLASH_SIZE * FSL_FSPI_FLASH_NUM >> 10;
+
+ /*
+ * Any read access to non-implemented addresses will provide
+ * undefined results.
+ *
+ * In case single die flash devices, TOP_ADDR_MEMA2 and
+ * TOP_ADDR_MEMB2 should be initialized/programmed to
+ * TOP_ADDR_MEMA1 and TOP_ADDR_MEMB1 respectively - in effect,
+ * setting the size of these devices to 0. This would ensure
+ * that the complete memory map is assigned to only one flash device.
+ */
+
+ fspi_write32(priv->flags, &priv->regs->flsha1cr0,
+ total_size);
+ fspi_write32(priv->flags, &priv->regs->flsha2cr0,
+ 0);
+ fspi_write32(priv->flags, &priv->regs->flshb1cr0,
+ 0);
+ fspi_write32(priv->flags, &priv->regs->flshb2cr0,
+ 0);
+
+ fspi_set_lut(priv);
+
+#ifdef CONFIG_FSI_AHB
+ fspi_init_ahb_read(priv);
+#endif
+
+ fspi_module_disable(priv, 0);
+
+ return 0;
+}
+
+static int fsl_fspi_ofdata_to_platdata(struct udevice *bus)
+{
+ struct fdt_resource res_regs, res_mem;
+ struct fsl_fspi_platdata *plat = bus->platdata;
+ const void *blob = gd->fdt_blob;
+ int node = ofnode_to_offset(bus->node);
+ int ret, flash_num = 0, subnode;
+
+ if (fdtdec_get_bool(blob, node, "big-endian"))
+ plat->flags |= FSPI_FLAG_REGMAP_ENDIAN_BIG;
+
+ ret = fdt_get_named_resource(blob, node, "reg", "reg-names",
+ "FlexSPI", &res_regs);
+ if (ret) {
+ debug("Error: can't get regs base addresses(ret = %d)!\n", ret);
+ return -ENOMEM;
+ }
+ ret = fdt_get_named_resource(blob, node, "reg", "reg-names",
+ "FlexSPI-memory", &res_mem);
+ if (ret) {
+ debug("Error: can't get AMBA base addresses(ret = %d)!\n", ret);
+ return -ENOMEM;
+ }
+
+ /* Count flash numbers */
+ fdt_for_each_subnode(subnode, blob, node)
+ ++flash_num;
+
+ if (flash_num == 0) {
+ debug("Error: Missing flashes!\n");
+ return -ENODEV;
+ }
+
+ plat->speed_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
+ FSL_FSPI_DEFAULT_SCK_FREQ);
+ plat->num_chipselect = fdtdec_get_int(blob, node, "num-cs",
+ FSL_FSPI_MAX_CHIPSELECT_NUM);
+
+ plat->reg_base = res_regs.start;
+ plat->amba_base = 0;
+ plat->amba_total_size = res_mem.end - res_mem.start + 1;
+ plat->flash_num = flash_num;
+
+ debug("%s: regs=<0x%x> <0x%x, 0x%x>, max-frequency=%d, endianness=%s\n",
+ __func__, plat->reg_base, plat->amba_base,
+ plat->amba_total_size, plat->speed_hz,
+ plat->flags & FSPI_FLAG_REGMAP_ENDIAN_BIG ? "be" : "le");
+
+ return 0;
+}
+
+static int fsl_fspi_xfer(struct udevice *dev, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ struct fsl_fspi_priv *priv;
+
+ priv = dev_get_priv(dev->parent);
+
+ return fspi_xfer(priv, bitlen, dout, din, flags);
+}
+
+static int fsl_fspi_claim_bus(struct udevice *dev)
+{
+ struct fsl_fspi_priv *priv;
+ struct udevice *bus;
+ struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+
+ bus = dev->parent;
+ priv = dev_get_priv(bus);
+
+ priv->cur_amba_base =
+ priv->amba_base[0] + FSL_FSPI_FLASH_SIZE * slave_plat->cs;
+
+ return 0;
+}
+
+static int fsl_fspi_release_bus(struct udevice *dev)
+{
+ return 0;
+}
+
+static int fsl_fspi_set_speed(struct udevice *bus, uint speed)
+{
+ /* Nothing to do */
+ return 0;
+}
+
+static int fsl_fspi_set_mode(struct udevice *bus, uint mode)
+{
+ /* Nothing to do */
+ return 0;
+}
+
+static const struct dm_spi_ops fsl_fspi_ops = {
+ .claim_bus = fsl_fspi_claim_bus,
+ .release_bus = fsl_fspi_release_bus,
+ .xfer = fsl_fspi_xfer,
+ .set_speed = fsl_fspi_set_speed,
+ .set_mode = fsl_fspi_set_mode,
+};
+
+static const struct udevice_id fsl_fspi_ids[] = {
+ { .compatible = "fsl,imx8qm-flexspi" },
+ { .compatible = "fsl,imx8qxp-flexspi" },
+ { .compatible = "fsl,imx8mm-flexspi" },
+ { }
+};
+
+U_BOOT_DRIVER(fsl_fspi) = {
+ .name = "fsl_fspi",
+ .id = UCLASS_SPI,
+ .of_match = fsl_fspi_ids,
+ .ops = &fsl_fspi_ops,
+ .ofdata_to_platdata = fsl_fspi_ofdata_to_platdata,
+ .platdata_auto_alloc_size = sizeof(struct fsl_fspi_platdata),
+ .priv_auto_alloc_size = sizeof(struct fsl_fspi_priv),
+ .probe = fsl_fspi_probe,
+ .child_pre_probe = fsl_fspi_child_pre_probe,
+};
diff --git a/drivers/spi/fsl_fspi.h b/drivers/spi/fsl_fspi.h
new file mode 100644
index 0000000000..bff13b9bd8
--- /dev/null
+++ b/drivers/spi/fsl_fspi.h
@@ -0,0 +1,170 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2019 NXP
+ *
+ * Register definitions for NXP FLEXSPI
+ */
+
+#ifndef _FSL_FSPI_H_
+#define _FSL_FSPI_H_
+
+#include <linux/bitops.h>
+
+struct fsl_fspi_regs {
+ u32 mcr0;
+ u32 mcr1;
+ u32 mcr2;
+ u32 ahbcr;
+ u32 inten;
+ u32 intr;
+ u32 lutkey;
+ u32 lutcr;
+ u32 ahbrxbuf0cr0;
+ u32 ahbrxbuf1cr0;
+ u32 ahbrxbuf2cr0;
+ u32 ahbrxbuf3cr0;
+ u32 ahbrxbuf4cr0;
+ u32 ahbrxbuf5cr0;
+ u32 ahbrxbuf6cr0;
+ u32 ahbrxbuf7cr0;
+ u32 ahbrxbuf0cr1;
+ u32 ahbrxbuf1cr1;
+ u32 ahbrxbuf2cr1;
+ u32 ahbrxbuf3cr1;
+ u32 ahbrxbuf4cr1;
+ u32 ahbrxbuf5cr1;
+ u32 ahbrxbuf6cr1;
+ u32 ahbrxbuf7cr1;
+ u32 flsha1cr0;
+ u32 flsha2cr0;
+ u32 flshb1cr0;
+ u32 flshb2cr0;
+ u32 flsha1cr1;
+ u32 flsha2cr1;
+ u32 flshb1cr1;
+ u32 flshb2cr1;
+ u32 flsha1cr2;
+ u32 flsha2cr2;
+ u32 flshb1cr2;
+ u32 flshb2cr2;
+ u32 flshcr3;
+ u32 flshcr4;
+ u32 flshcr5;
+ u32 flshcr6;
+ u32 ipcr0;
+ u32 ipcr1;
+ u32 ipcr2;
+ u32 ipcr3;
+ u32 ipcmd;
+ u32 dlpr;
+ u32 iprxfcr;
+ u32 iptxfcr;
+ u32 dllacr;
+ u32 dllbcr;
+ u32 soccr;
+ u32 misccr2;
+ u32 misccr3;
+ u32 misccr4;
+ u32 misccr5;
+ u32 misccr6;
+ u32 sts0;
+ u32 sts1;
+ u32 sts2;
+ u32 ahbspndsts;
+ u32 iprxfsts;
+ u32 iptxfsts;
+ u32 rsvd[2];
+ u32 rfdr[32];
+ u32 tfdr[32];
+ u32 lut[128];
+};
+
+/* The registers */
+#define FLEXSPI_MCR0_MDIS_SHIFT 1
+#define FLEXSPI_MCR0_MDIS_MASK BIT(1)
+#define FLEXSPI_MCR0_SWRST_SHIFT 0
+#define FLEXSPI_MCR0_SWRST_MASK BIT(0)
+
+#define FLEXSPI_AHBCR_PREF_EN_SHIFT 5
+#define FLEXSPI_AHBCR_PREF_EN_MASK BIT(5)
+
+#define FLEXSPI_INTR_IPTXWE_SHIFT 6
+#define FLEXSPI_INTR_IPTXWE_MASK BIT(6)
+#define FLEXSPI_INTR_IPRXWA_SHIFT 5
+#define FLEXSPI_INTR_IPRXWA_MASK BIT(5)
+#define FLEXSPI_INTR_IPCMDDONE_SHIFT 0
+#define FLEXSPI_INTR_IPCMDDONE_MASK BIT(0)
+
+#define FLEXSPI_LUTKEY_VALUE 0x5AF05AF0
+
+#define FLEXSPI_LCKER_LOCK 0x1
+#define FLEXSPI_LCKER_UNLOCK 0x2
+
+#define FLEXSPI_BUFXCR_INVALID_MSTRID 0xe
+#define FLEXSPI_AHBRXBUF0CR7_PREF_SHIFT 31
+#define FLEXSPI_AHBRXBUF0CR7_PREF_MASK BIT(31)
+
+#define FLEXSPI_IPCR1_SEQID_SHIFT 16
+
+#define FLEXSPI_IPRXFCR_CLR_SHIFT 0
+#define FLEXSPI_IPRXFCR_CLR_MASK BIT(0)
+
+#define FLEXSPI_IPTXFCR_CLR_SHIFT 0
+#define FLEXSPI_IPTXFCR_CLR_MASK BIT(0)
+
+#define FLEXSPI_IPRXFSTS_FILL_SHIFT 0
+#define FLEXSPI_IPRXFSTS_FILL_MASK (0xFF << FLEXSPI_IPRXFSTS_FILL_SHIFT)
+
+/* register map end */
+
+#define OPRND0_SHIFT 0
+#define OPRND0(x) ((x) << OPRND0_SHIFT)
+#define PAD0_SHIFT 8
+#define PAD0(x) ((x) << PAD0_SHIFT)
+#define INSTR0_SHIFT 10
+#define INSTR0(x) ((x) << INSTR0_SHIFT)
+#define OPRND1_SHIFT 16
+#define OPRND1(x) ((x) << OPRND1_SHIFT)
+#define PAD1_SHIFT 24
+#define PAD1(x) ((x) << PAD1_SHIFT)
+#define INSTR1_SHIFT 26
+#define INSTR1(x) ((x) << INSTR1_SHIFT)
+
+#define LUT_STOP 0x00
+#define LUT_CMD 0x01
+#define LUT_ADDR 0x02
+#define LUT_CADDR_SDR 0x03
+#define LUT_MODE 0x04
+#define LUT_MODE2 0x05
+#define LUT_MODE4 0x06
+#define LUT_MODE8 0x07
+#define LUT_WRITE 0x08
+#define LUT_READ 0x09
+#define LUT_LEARN_SDR 0x0A
+#define LUT_DATSZ_SDR 0x0B
+#define LUT_DUMMY 0x0C
+#define LUT_DUMMY_RWDS_SDR 0x0D
+#define LUT_JMP_ON_CS 0x1F
+#define LUT_CMD_DDR 0x21
+#define LUT_ADDR_DDR 0x22
+#define LUT_CADDR_DDR 0x23
+#define LUT_MODE_DDR 0x24
+#define LUT_MODE2_DDR 0x25
+#define LUT_MODE4_DDR 0x26
+#define LUT_MODE8_DDR 0x27
+#define LUT_WRITE_DDR 0x28
+#define LUT_READ_DDR 0x29
+#define LUT_LEARN_DDR 0x2A
+#define LUT_DATSZ_DDR 0x2B
+#define LUT_DUMMY_DDR 0x2C
+#define LUT_DUMMY_RWDS_DDR 0x2D
+
+#define LUT_PAD1 0
+#define LUT_PAD2 1
+#define LUT_PAD4 2
+#define LUT_PAD8 3
+
+#define ADDR24BIT 0x18
+#define ADDR32BIT 0x20
+
+#endif /* _FSL_FSPI_H_ */
--
2.16.4
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