Introduce Socionext F_OSPI controller driver. This controller is used to
communicate with slave devices such as SPI flash memories. It supports
4 slave devices and up to 8-bit wide bus, but supports master mode only.
This driver uses spi-mem framework for SPI flash memory access, and
can only operate indirect access mode and single data rate mode.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko(a)socionext.com>
---
drivers/spi/Kconfig | 8 +
drivers/spi/Makefile | 1 +
drivers/spi/spi-sn-f-ospi.c | 686 ++++++++++++++++++++++++++++++++++++
3 files changed, 695 insertions(+)
create mode 100644 drivers/spi/spi-sn-f-ospi.c
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index c6900f449d5f..ff68ffbc0e06 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -451,6 +451,14 @@ config SOFT_SPI
Enable Soft SPI driver. This driver is to use GPIO simulate
the SPI protocol.
+config SPI_SN_F_OSPI
+ tristate "Socionext F_OSPI SPI flash controller"
+ depends on SPI_MEM
+ help
+ This enables support for the Socionext F_OSPI controller
+ for connecting an SPI flash memory over up to 8-bit wide bus.
+ It supports indirect access mode only.
+
config SPI_SUNXI
bool "Allwinner SoC SPI controllers"
default ARCH_SUNXI
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 674d81caae3b..95dba9ac4559 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_ROCKCHIP_SFC) += rockchip_sfc.o
obj-$(CONFIG_ROCKCHIP_SPI) += rk_spi.o
obj-$(CONFIG_SANDBOX_SPI) += sandbox_spi.o
obj-$(CONFIG_SPI_SIFIVE) += spi-sifive.o
+obj-$(CONFIG_SPI_SN_F_OSPI) += spi-sn-f-ospi.o
obj-$(CONFIG_SPI_SUNXI) += spi-sunxi.o
obj-$(CONFIG_SH_QSPI) += sh_qspi.o
obj-$(CONFIG_STM32_QSPI) += stm32_qspi.o
diff --git a/drivers/spi/spi-sn-f-ospi.c b/drivers/spi/spi-sn-f-ospi.c
new file mode 100644
index 000000000000..ebf2903d3ea7
--- /dev/null
+++ b/drivers/spi/spi-sn-f-ospi.c
@@ -0,0 +1,686 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Socionext SPI flash controller F_OSPI driver
+ * Copyright (C) 2021 Socionext Inc.
+ */
+
+#include <clk.h>
+#include <common.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <linux/bitfield.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <spi.h>
+#include <spi-mem.h>
+
+/* Registers */
+#define OSPI_PROT_CTL_INDIR 0x00
+#define OSPI_PROT_MODE_DATA_MASK GENMASK(31, 30)
+#define OSPI_PROT_MODE_ALT_MASK GENMASK(29, 28)
+#define OSPI_PROT_MODE_ADDR_MASK GENMASK(27, 26)
+#define OSPI_PROT_MODE_CODE_MASK GENMASK(25, 24)
+#define OSPI_PROT_MODE_SINGLE 0
+#define OSPI_PROT_MODE_DUAL 1
+#define OSPI_PROT_MODE_QUAD 2
+#define OSPI_PROT_MODE_OCTAL 3
+#define OSPI_PROT_DATA_RATE_DATA BIT(23)
+#define OSPI_PROT_DATA_RATE_ALT BIT(22)
+#define OSPI_PROT_DATA_RATE_ADDR BIT(21)
+#define OSPI_PROT_DATA_RATE_CODE BIT(20)
+#define OSPI_PROT_SDR 0
+#define OSPI_PROT_DDR 1
+#define OSPI_PROT_BIT_POS_DATA BIT(19)
+#define OSPI_PROT_BIT_POS_ALT BIT(18)
+#define OSPI_PROT_BIT_POS_ADDR BIT(17)
+#define OSPI_PROT_BIT_POS_CODE BIT(16)
+#define OSPI_PROT_SAMP_EDGE BIT(12)
+#define OSPI_PROT_DATA_UNIT_MASK GENMASK(11, 10)
+#define OSPI_PROT_DATA_UNIT_1B 0
+#define OSPI_PROT_DATA_UNIT_2B 1
+#define OSPI_PROT_DATA_UNIT_4B 3
+#define OSPI_PROT_TRANS_DIR_WRITE BIT(9)
+#define OSPI_PROT_DATA_EN BIT(8)
+#define OSPI_PROT_ALT_SIZE_MASK GENMASK(7, 5)
+#define OSPI_PROT_ADDR_SIZE_MASK GENMASK(4, 2)
+#define OSPI_PROT_CODE_SIZE_MASK GENMASK(1, 0)
+
+#define OSPI_CLK_CTL 0x10
+#define OSPI_CLK_CTL_BOOT_INT_CLK_EN BIT(16)
+#define OSPI_CLK_CTL_PHA BIT(12)
+#define OSPI_CLK_CTL_PHA_180 0
+#define OSPI_CLK_CTL_PHA_90 1
+#define OSPI_CLK_CTL_DIV GENMASK(9, 8)
+#define OSPI_CLK_CTL_DIV_1 0
+#define OSPI_CLK_CTL_DIV_2 1
+#define OSPI_CLK_CTL_DIV_4 2
+#define OSPI_CLK_CTL_DIV_8 3
+#define OSPI_CLK_CTL_INT_CLK_EN BIT(0)
+
+#define OSPI_CS_CTL1 0x14
+#define OSPI_CS_CTL2 0x18
+#define OSPI_SSEL 0x20
+#define OSPI_CMD_IDX_INDIR 0x40
+#define OSPI_ADDR 0x50
+#define OSPI_ALT_INDIR 0x60
+#define OSPI_DMY_INDIR 0x70
+#define OSPI_DAT 0x80
+#define OSPI_DAT_SWP_INDIR 0x90
+
+#define OSPI_DAT_SIZE_INDIR 0xA0
+#define OSPI_DAT_SIZE_EN BIT(15)
+#define OSPI_DAT_SIZE_MASK GENMASK(10, 0)
+#define OSPI_DAT_SIZE_MAX (OSPI_DAT_SIZE_MASK + 1)
+
+#define OSPI_TRANS_CTL 0xC0
+#define OSPI_TRANS_CTL_STOP_REQ BIT(1) /* RW1AC */
+#define OSPI_TRANS_CTL_START_REQ BIT(0) /* RW1AC */
+
+#define OSPI_ACC_MODE 0xC4
+#define OSPI_ACC_MODE_BOOT_DISABLE BIT(0)
+
+#define OSPI_SWRST 0xD0
+#define OSPI_SWRST_INDIR_WRITE_FIFO BIT(9) /* RW1AC */
+#define OSPI_SWRST_INDIR_READ_FIFO BIT(8) /* RW1AC */
+
+#define OSPI_STAT 0xE0
+#define OSPI_STAT_IS_AXI_WRITING BIT(10)
+#define OSPI_STAT_IS_AXI_READING BIT(9)
+#define OSPI_STAT_IS_SPI_INT_CLK_STOP BIT(4)
+#define OSPI_STAT_IS_SPI_IDLE BIT(3)
+
+#define OSPI_IRQ 0xF0
+#define OSPI_IRQ_CS_DEASSERT BIT(8)
+#define OSPI_IRQ_WRITE_BUF_READY BIT(2)
+#define OSPI_IRQ_READ_BUF_READY BIT(1)
+#define OSPI_IRQ_CS_TRANS_COMP BIT(0)
+#define OSPI_IRQ_ALL \
+ (OSPI_IRQ_CS_DEASSERT | OSPI_IRQ_WRITE_BUF_READY \
+ | OSPI_IRQ_READ_BUF_READY | OSPI_IRQ_CS_TRANS_COMP)
+
+#define OSPI_IRQ_STAT_EN 0xF4
+#define OSPI_IRQ_SIG_EN 0xF8
+
+/* Parameters */
+#define OSPI_NUM_CS 4
+#define OSPI_DUMMY_CYCLE_MAX 255
+#define OSPI_WAIT_MAX_MSEC 100
+
+struct f_ospi {
+ void __iomem *base;
+ struct udevice *dev;
+ struct clk clk;
+
+ u32 mode;
+ u32 max_speed_hz;
+ u32 num_cs;
+ u32 chip_select;
+};
+
+static u32 f_ospi_get_dummy_cycle(const struct spi_mem_op *op)
+{
+ return (op->dummy.nbytes * 8) / op->dummy.buswidth;
+}
+
+static void f_ospi_clear_irq(struct f_ospi *ospi)
+{
+ writel(OSPI_IRQ_CS_DEASSERT | OSPI_IRQ_CS_TRANS_COMP,
+ ospi->base + OSPI_IRQ);
+}
+
+static void f_ospi_enable_irq_status(struct f_ospi *ospi, u32 irq_bits)
+{
+ u32 val;
+
+ val = readl(ospi->base + OSPI_IRQ_STAT_EN);
+ val |= irq_bits;
+ writel(val, ospi->base + OSPI_IRQ_STAT_EN);
+}
+
+static void f_ospi_disable_irq_status(struct f_ospi *ospi, u32 irq_bits)
+{
+ u32 val;
+
+ val = readl(ospi->base + OSPI_IRQ_STAT_EN);
+ val &= ~irq_bits;
+ writel(val, ospi->base + OSPI_IRQ_STAT_EN);
+}
+
+static void f_ospi_disable_irq_output(struct f_ospi *ospi, u32 irq_bits)
+{
+ u32 val;
+
+ val = readl(ospi->base + OSPI_IRQ_SIG_EN);
+ val &= ~irq_bits;
+ writel(val, ospi->base + OSPI_IRQ_SIG_EN);
+}
+
+static int f_ospi_prepare_config(struct f_ospi *ospi)
+{
+ u32 val, stat0, stat1;
+
+ /* G4: Disable internal clock */
+ val = readl(ospi->base + OSPI_CLK_CTL);
+ val &= ~(OSPI_CLK_CTL_BOOT_INT_CLK_EN | OSPI_CLK_CTL_INT_CLK_EN);
+ writel(val, ospi->base + OSPI_CLK_CTL);
+
+ /* G5: Wait for stop */
+ stat0 = OSPI_STAT_IS_AXI_WRITING | OSPI_STAT_IS_AXI_READING;
+ stat1 = OSPI_STAT_IS_SPI_IDLE | OSPI_STAT_IS_SPI_INT_CLK_STOP;
+
+ return readl_poll_timeout(ospi->base + OSPI_STAT,
+ val, (val & (stat0 | stat1)) == stat1,
+ OSPI_WAIT_MAX_MSEC);
+}
+
+static int f_ospi_unprepare_config(struct f_ospi *ospi)
+{
+ u32 val;
+
+ /* G11: Enable internal clock */
+ val = readl(ospi->base + OSPI_CLK_CTL);
+ val |= OSPI_CLK_CTL_BOOT_INT_CLK_EN | OSPI_CLK_CTL_INT_CLK_EN;
+ writel(val, ospi->base + OSPI_CLK_CTL);
+
+ /* G12: Wait for clock to start */
+ return readl_poll_timeout(ospi->base + OSPI_STAT,
+ val, !(val & OSPI_STAT_IS_SPI_INT_CLK_STOP),
+ OSPI_WAIT_MAX_MSEC);
+}
+
+static void f_ospi_config_clk(struct f_ospi *ospi, u32 device_hz)
+{
+ long rate_hz = clk_get_rate(&ospi->clk);
+ u32 div = DIV_ROUND_UP(rate_hz, device_hz);
+ u32 div_reg;
+ u32 val;
+
+ if (rate_hz < device_hz) {
+ dev_warn(ospi->dev, "Device frequency too large: %d\n",
+ device_hz);
+ div_reg = OSPI_CLK_CTL_DIV_1;
+ } else {
+ if (div == 1) {
+ div_reg = OSPI_CLK_CTL_DIV_1;
+ } else if (div == 2) {
+ div_reg = OSPI_CLK_CTL_DIV_2;
+ } else if (div <= 4) {
+ div_reg = OSPI_CLK_CTL_DIV_4;
+ } else if (div <= 8) {
+ div_reg = OSPI_CLK_CTL_DIV_8;
+ } else {
+ dev_warn(ospi->dev, "Device frequency too small: %d\n",
+ device_hz);
+ div_reg = OSPI_CLK_CTL_DIV_8;
+ }
+ }
+
+ /*
+ * G7: Set clock mode
+ * clock phase is fixed at 180 degrees and configure edge direction
+ * instead.
+ */
+ val = readl(ospi->base + OSPI_CLK_CTL);
+
+ val &= ~(OSPI_CLK_CTL_PHA | OSPI_CLK_CTL_DIV);
+ val |= FIELD_PREP(OSPI_CLK_CTL_PHA, OSPI_CLK_CTL_PHA_180)
+ | FIELD_PREP(OSPI_CLK_CTL_DIV, div_reg);
+
+ writel(val, ospi->base + OSPI_CLK_CTL);
+}
+
+static void f_ospi_config_dll(struct f_ospi *ospi)
+{
+ /* G8: Configure DLL, nothing */
+}
+
+static u8 f_ospi_get_mode(struct f_ospi *ospi, int width, int data_size)
+{
+ u8 mode = OSPI_PROT_MODE_SINGLE;
+
+ switch (width) {
+ case 1:
+ mode = OSPI_PROT_MODE_SINGLE;
+ break;
+ case 2:
+ mode = OSPI_PROT_MODE_DUAL;
+ break;
+ case 4:
+ mode = OSPI_PROT_MODE_QUAD;
+ break;
+ case 8:
+ mode = OSPI_PROT_MODE_OCTAL;
+ break;
+ default:
+ if (data_size)
+ dev_err(ospi->dev, "Invalid buswidth: %d\n", width);
+ break;
+ }
+
+ return mode;
+}
+
+static void f_ospi_config_indir_protocol(struct f_ospi *ospi,
+ const struct spi_mem_op *op)
+{
+ u8 mode;
+ u32 prot = 0, val;
+ int unit;
+
+ /* Set one chip select */
+ writel(BIT(ospi->chip_select), ospi->base + OSPI_SSEL);
+
+ mode = f_ospi_get_mode(ospi, op->cmd.buswidth, 1);
+ prot |= FIELD_PREP(OSPI_PROT_MODE_CODE_MASK, mode);
+
+ mode = f_ospi_get_mode(ospi, op->addr.buswidth, op->addr.nbytes);
+ prot |= FIELD_PREP(OSPI_PROT_MODE_ADDR_MASK, mode);
+
+ mode = f_ospi_get_mode(ospi, op->data.buswidth, op->data.nbytes);
+ prot |= FIELD_PREP(OSPI_PROT_MODE_DATA_MASK, mode);
+
+ prot |= FIELD_PREP(OSPI_PROT_DATA_RATE_DATA, OSPI_PROT_SDR);
+ prot |= FIELD_PREP(OSPI_PROT_DATA_RATE_ALT, OSPI_PROT_SDR);
+ prot |= FIELD_PREP(OSPI_PROT_DATA_RATE_ADDR, OSPI_PROT_SDR);
+ prot |= FIELD_PREP(OSPI_PROT_DATA_RATE_CODE, OSPI_PROT_SDR);
+
+ if (ospi->mode & SPI_LSB_FIRST)
+ prot |= OSPI_PROT_BIT_POS_DATA | OSPI_PROT_BIT_POS_ALT
+ | OSPI_PROT_BIT_POS_ADDR | OSPI_PROT_BIT_POS_CODE;
+
+ if (ospi->mode & SPI_CPHA)
+ prot |= OSPI_PROT_SAMP_EDGE;
+
+ /* Examine nbytes % 4 */
+ switch (op->data.nbytes & 0x3) {
+ case 0:
+ unit = OSPI_PROT_DATA_UNIT_4B;
+ val = 0;
+ break;
+ case 2:
+ unit = OSPI_PROT_DATA_UNIT_2B;
+ val = OSPI_DAT_SIZE_EN | (op->data.nbytes - 1);
+ break;
+ default:
+ unit = OSPI_PROT_DATA_UNIT_1B;
+ val = OSPI_DAT_SIZE_EN | (op->data.nbytes - 1);
+ break;
+ }
+ prot |= FIELD_PREP(OSPI_PROT_DATA_UNIT_MASK, unit);
+
+ switch (op->data.dir) {
+ case SPI_MEM_DATA_IN:
+ prot |= OSPI_PROT_DATA_EN;
+ break;
+
+ case SPI_MEM_DATA_OUT:
+ prot |= OSPI_PROT_TRANS_DIR_WRITE | OSPI_PROT_DATA_EN;
+ break;
+
+ case SPI_MEM_NO_DATA:
+ prot |= OSPI_PROT_TRANS_DIR_WRITE;
+ break;
+
+ default:
+ dev_warn(ospi->dev, "Unsupported direction");
+ break;
+ }
+
+ prot |= FIELD_PREP(OSPI_PROT_ADDR_SIZE_MASK, op->addr.nbytes);
+ prot |= FIELD_PREP(OSPI_PROT_CODE_SIZE_MASK, 1); /* 1byte */
+
+ writel(prot, ospi->base + OSPI_PROT_CTL_INDIR);
+ writel(val, ospi->base + OSPI_DAT_SIZE_INDIR);
+}
+
+static int f_ospi_indir_prepare_op(struct f_ospi *ospi,
+ const struct spi_mem_op *op)
+{
+ u32 irq_stat_en;
+ int ret;
+
+ ret = f_ospi_prepare_config(ospi);
+ if (ret)
+ return ret;
+
+ f_ospi_config_clk(ospi, ospi->max_speed_hz);
+
+ f_ospi_config_indir_protocol(ospi, op);
+
+ writel(f_ospi_get_dummy_cycle(op), ospi->base + OSPI_DMY_INDIR);
+ writel(op->addr.val, ospi->base + OSPI_ADDR);
+ writel(op->cmd.opcode, ospi->base + OSPI_CMD_IDX_INDIR);
+
+ f_ospi_clear_irq(ospi);
+
+ switch (op->data.dir) {
+ case SPI_MEM_DATA_IN:
+ irq_stat_en = OSPI_IRQ_READ_BUF_READY | OSPI_IRQ_CS_TRANS_COMP;
+ break;
+
+ case SPI_MEM_DATA_OUT:
+ irq_stat_en = OSPI_IRQ_WRITE_BUF_READY | OSPI_IRQ_CS_TRANS_COMP;
+ break;
+
+ case SPI_MEM_NO_DATA:
+ irq_stat_en = OSPI_IRQ_CS_TRANS_COMP;
+ break;
+
+ default:
+ dev_warn(ospi->dev, "Unsupported direction");
+ irq_stat_en = 0;
+ }
+
+ f_ospi_disable_irq_status(ospi, ~irq_stat_en);
+ f_ospi_enable_irq_status(ospi, irq_stat_en);
+
+ return f_ospi_unprepare_config(ospi);
+}
+
+static void f_ospi_indir_start_xfer(struct f_ospi *ospi)
+{
+ /* Write only 1, auto cleared */
+ writel(OSPI_TRANS_CTL_START_REQ, ospi->base + OSPI_TRANS_CTL);
+}
+
+static void f_ospi_indir_stop_xfer(struct f_ospi *ospi)
+{
+ /* Write only 1, auto cleared */
+ writel(OSPI_TRANS_CTL_STOP_REQ, ospi->base + OSPI_TRANS_CTL);
+}
+
+static int f_ospi_indir_wait_xfer_complete(struct f_ospi *ospi)
+{
+ u32 val;
+
+ return readl_poll_timeout(ospi->base + OSPI_IRQ, val,
+ val & OSPI_IRQ_CS_TRANS_COMP,
+ OSPI_WAIT_MAX_MSEC);
+}
+
+static int f_ospi_indir_read(struct f_ospi *ospi,
+ const struct spi_mem_op *op)
+{
+ u8 *buf = op->data.buf.in;
+ u32 val;
+ int i, ret;
+
+ /* E1-2: Prepare transfer operation */
+ ret = f_ospi_indir_prepare_op(ospi, op);
+ if (ret)
+ goto out;
+
+ f_ospi_indir_start_xfer(ospi);
+
+ /* E3-4: Wait for ready and read data */
+ for (i = 0; i < op->data.nbytes; i++) {
+ ret = readl_poll_timeout(ospi->base + OSPI_IRQ, val,
+ val & OSPI_IRQ_READ_BUF_READY,
+ OSPI_WAIT_MAX_MSEC);
+ if (ret)
+ goto out;
+
+ buf[i] = readl(ospi->base + OSPI_DAT) & 0xFF;
+ }
+
+ /* E5-6: Stop transfer if data size is nothing */
+ if (!(readl(ospi->base + OSPI_DAT_SIZE_INDIR) & OSPI_DAT_SIZE_EN))
+ f_ospi_indir_stop_xfer(ospi);
+
+ /* E7-8: Wait for completion and clear */
+ ret = f_ospi_indir_wait_xfer_complete(ospi);
+ if (ret)
+ goto out;
+
+ writel(OSPI_IRQ_CS_TRANS_COMP, ospi->base + OSPI_IRQ);
+
+ /* E9: Do nothing if data size is valid */
+ if (readl(ospi->base + OSPI_DAT_SIZE_INDIR) & OSPI_DAT_SIZE_EN)
+ goto out;
+
+ /* E10-11: Reset and check read fifo */
+ writel(OSPI_SWRST_INDIR_READ_FIFO, ospi->base + OSPI_SWRST);
+
+ ret = readl_poll_timeout(ospi->base + OSPI_SWRST, val,
+ !(val & OSPI_SWRST_INDIR_READ_FIFO),
+ OSPI_WAIT_MAX_MSEC);
+out:
+ return ret;
+}
+
+static int f_ospi_indir_write(struct f_ospi *ospi,
+ const struct spi_mem_op *op)
+{
+ u8 *buf = (u8 *)op->data.buf.out;
+ u32 val;
+ int i, ret;
+
+ /* F1-3: Prepare transfer operation */
+ ret = f_ospi_indir_prepare_op(ospi, op);
+ if (ret)
+ goto out;
+
+ f_ospi_indir_start_xfer(ospi);
+
+ if (!(readl(ospi->base + OSPI_PROT_CTL_INDIR) & OSPI_PROT_DATA_EN))
+ goto nodata;
+
+ /* F4-5: Wait for buffer ready and write data */
+ for (i = 0; i < op->data.nbytes; i++) {
+ ret = readl_poll_timeout(ospi->base + OSPI_IRQ, val,
+ val & OSPI_IRQ_WRITE_BUF_READY,
+ OSPI_WAIT_MAX_MSEC);
+ if (ret)
+ goto out;
+
+ writel(buf[i], ospi->base + OSPI_DAT);
+ }
+
+ /* F6-7: Stop transfer if data size is nothing */
+ if (!(readl(ospi->base + OSPI_DAT_SIZE_INDIR) & OSPI_DAT_SIZE_EN))
+ f_ospi_indir_stop_xfer(ospi);
+
+nodata:
+ /* F8-9: Wait for completion and clear */
+ ret = f_ospi_indir_wait_xfer_complete(ospi);
+ if (ret)
+ goto out;
+
+ writel(OSPI_IRQ_CS_TRANS_COMP, ospi->base + OSPI_IRQ);
+out:
+ return ret;
+}
+
+static int f_ospi_exec_op(struct spi_slave *slave, const struct spi_mem_op *op)
+{
+ struct f_ospi *ospi = dev_get_priv(slave->dev->parent);
+ struct dm_spi_slave_plat *slave_plat;
+ int err = 0;
+
+ slave_plat = dev_get_parent_plat(slave->dev);
+ ospi->chip_select = slave_plat->cs;
+
+ switch (op->data.dir) {
+ case SPI_MEM_DATA_IN:
+ err = f_ospi_indir_read(ospi, op);
+ break;
+
+ case SPI_MEM_DATA_OUT:
+ fallthrough;
+ case SPI_MEM_NO_DATA:
+ err = f_ospi_indir_write(ospi, op);
+ break;
+
+ default:
+ dev_warn(ospi->dev, "Unsupported direction");
+ err = -EOPNOTSUPP;
+ }
+
+ return err;
+}
+
+static bool f_ospi_supports_op_width(const struct spi_mem_op *op)
+{
+ u8 width_available[] = { 0, 1, 2, 4, 8 };
+ u8 width_op[] = { op->cmd.buswidth, op->addr.buswidth,
+ op->dummy.buswidth, op->data.buswidth };
+ bool is_match_found;
+ int i, j;
+
+ for (i = 0; i < ARRAY_SIZE(width_op); i++) {
+ is_match_found = false;
+
+ for (j = 0; j < ARRAY_SIZE(width_available); j++) {
+ if (width_op[i] == width_available[j]) {
+ is_match_found = true;
+ break;
+ }
+ }
+
+ if (!is_match_found)
+ return false;
+ }
+
+ return true;
+}
+
+static bool f_ospi_supports_op(struct spi_slave *slave,
+ const struct spi_mem_op *op)
+{
+ if (f_ospi_get_dummy_cycle(op) > OSPI_DUMMY_CYCLE_MAX)
+ return false;
+
+ if (op->addr.nbytes > 4)
+ return false;
+
+ if (!f_ospi_supports_op_width(op))
+ return false;
+
+ return true;
+}
+
+static int f_ospi_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op)
+{
+ op->data.nbytes = min((int)op->data.nbytes, (int)(OSPI_DAT_SIZE_MAX));
+
+ return 0;
+}
+
+static const struct spi_controller_mem_ops f_ospi_mem_ops = {
+ .adjust_op_size = f_ospi_adjust_op_size,
+ .supports_op = f_ospi_supports_op,
+ .exec_op = f_ospi_exec_op,
+};
+
+static int f_ospi_set_speed(struct udevice *bus, u32 speed)
+{
+ struct f_ospi *ospi = dev_get_priv(bus);
+
+ ospi->max_speed_hz = speed;
+
+ return 0;
+}
+
+static int f_ospi_set_mode(struct udevice *bus, u32 mode)
+{
+ struct f_ospi *ospi = dev_get_priv(bus);
+
+ ospi->mode = mode;
+
+ return 0;
+}
+
+static int f_ospi_init(struct f_ospi *ospi)
+{
+ int ret;
+
+ ret = f_ospi_prepare_config(ospi);
+ if (ret)
+ return ret;
+
+ /* Disable boot signal */
+ writel(OSPI_ACC_MODE_BOOT_DISABLE, ospi->base + OSPI_ACC_MODE);
+
+ f_ospi_config_dll(ospi);
+
+ /* Disable IRQ */
+ f_ospi_clear_irq(ospi);
+ f_ospi_disable_irq_status(ospi, OSPI_IRQ_ALL);
+ f_ospi_disable_irq_output(ospi, OSPI_IRQ_ALL);
+
+ return f_ospi_unprepare_config(ospi);
+}
+
+static int f_ospi_of_to_plat(struct udevice *dev)
+{
+ struct f_ospi *ospi = dev_get_priv(dev);
+
+ ospi->base = dev_read_addr_ptr(dev);
+ ospi->num_cs = dev_read_u32_default(dev, "num-cs", OSPI_NUM_CS);
+
+ return 0;
+}
+
+static int f_ospi_probe(struct udevice *dev)
+{
+ struct f_ospi *ospi = dev_get_priv(dev);
+ int ret;
+
+ ospi->dev = dev;
+
+ ret = clk_get_by_index(dev, 0, &ospi->clk);
+ if (ret < 0) {
+ dev_err(dev, "Failed to get clock\n");
+ goto err_put_ctlr;
+ }
+
+ ret = clk_enable(&ospi->clk);
+ if (ret) {
+ dev_err(dev, "Failed to enable the clock\n");
+ goto err_put_ctlr;
+ }
+
+ ret = f_ospi_init(ospi);
+ if (ret)
+ goto err_disable_clk;
+
+ return 0;
+
+err_disable_clk:
+ clk_disable(&ospi->clk);
+
+err_put_ctlr:
+ dev_err(dev, "Socionext F_OSPI probe failed\n");
+ return ret;
+}
+
+static int f_ospi_remove(struct udevice *dev)
+{
+ struct f_ospi *ospi = dev_get_priv(dev);
+
+ clk_disable(&ospi->clk);
+
+ return 0;
+}
+
+static const struct dm_spi_ops f_ospi_ops = {
+ .set_speed = f_ospi_set_speed,
+ .set_mode = f_ospi_set_mode,
+ .mem_ops = &f_ospi_mem_ops,
+};
+
+static const struct udevice_id f_ospi_dt_ids[] = {
+ { .compatible = "socionext,f-ospi" },
+ {}
+};
+
+U_BOOT_DRIVER(f_ospi) = {
+ .name = "sn-f-ospi",
+ .id = UCLASS_SPI,
+ .of_match = f_ospi_dt_ids,
+ .of_to_plat = f_ospi_of_to_plat,
+ .ops = &f_ospi_ops,
+ .probe = f_ospi_probe,
+ .remove = f_ospi_remove,
+ .priv_auto = sizeof(struct f_ospi),
+};
--
2.25.1
