[PATCH v6 7/8] spi: ca_sflash: Add CAxxxx SPI Flash Controller

Alex Nemirovsky
2020-04-21T05:29:34Z

From: Pengpeng Chen <pengpeng.chen@cortina-access.com>

Add SPI Flash controller driver for Cortina Access
CAxxxx SoCs

Signed-off-by: Pengpeng Chen <pengpeng.chen@cortina-access.com>
Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com>
CC: Jagan Teki <jagan@amarulasolutions.com>
CC: Vignesh R <vigneshr@ti.com>

---

Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3:
- Fixup syntax issues related to checkpatch.pl cleanup

Changes in v2: None

MAINTAINERS | 2 +
drivers/spi/Kconfig | 8 +
drivers/spi/Makefile | 1 +
drivers/spi/ca_sflash.c | 576 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 587 insertions(+)
create mode 100644 drivers/spi/ca_sflash.c

diff --git a/MAINTAINERS b/MAINTAINERS
index e9b6bfa..5047748 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -184,6 +184,7 @@ F: drivers/mmc/ca_dw_mmc.c
F: drivers/i2c/i2c-cortina.c
F: drivers/i2c/i2c-cortina.h
F: drivers/led/led_cortina.c
+F: drivers/spi/ca_sflash.c

ARM/CZ.NIC TURRIS MOX SUPPORT
M: Marek Behun <marek.behun@nic.cz>
@@ -726,6 +727,7 @@ F: drivers/mmc/ca_dw_mmc.c
F: drivers/i2c/i2c-cortina.c
F: drivers/i2c/i2c-cortina.h
F: drivers/led/led_cortina.c
+F: drivers/spi/ca_sflash.c

MIPS MSCC
M: Gregory CLEMENT <gregory.clement@bootlin.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 4166c61..8a244f1 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -106,6 +106,14 @@ config BCMSTB_SPI
be used to access the SPI flash on platforms embedding this
Broadcom SPI core.

+config CORTINA_SFLASH
+ bool "Cortina-Access Serial Flash controller driver"
+ depends on DM_SPI && SPI_MEM
+ help
+ Enable the Cortina-Access Serial Flash controller driver. This driver
+ can be used to access the SPI NOR/NAND flash on platforms embedding this
+ Cortina-Access IP core.
+
config CADENCE_QSPI
bool "Cadence QSPI driver"
help
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 52462e1..32b98b4 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_BCM63XX_SPI) += bcm63xx_spi.o
obj-$(CONFIG_BCMSTB_SPI) += bcmstb_spi.o
obj-$(CONFIG_CADENCE_QSPI) += cadence_qspi.o cadence_qspi_apb.o
obj-$(CONFIG_CF_SPI) += cf_spi.o
+obj-$(CONFIG_CORTINA_SFLASH) += ca_sflash.o
obj-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
obj-$(CONFIG_DESIGNWARE_SPI) += designware_spi.o
obj-$(CONFIG_EXYNOS_SPI) += exynos_spi.o
diff --git a/drivers/spi/ca_sflash.c b/drivers/spi/ca_sflash.c
new file mode 100644
index 0000000..0709650
--- /dev/null
+++ b/drivers/spi/ca_sflash.c
@@ -0,0 +1,576 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Driver for Cortina SPI-FLASH Controller
+ *
+ * Copyright (C) 2020 Cortina Access Inc. All Rights Reserved.
+ *
+ * Author: PengPeng Chen <pengpeng.chen@cortina-access.com>
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <clk.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <linux/compat.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/ioport.h>
+#include <linux/sizes.h>
+#include <spi.h>
+#include <spi-mem.h>
+#include <reset.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct ca_sflash_regs {
+ u32 idr; /* 0x00:Flash word ID Register */
+ u32 tc; /* 0x04:Flash Timeout Counter Register */
+ u32 sr; /* 0x08:Flash Status Register */
+ u32 tr; /* 0x0C:Flash Type Register */
+ u32 asr; /* 0x10:Flash ACCESS START/BUSY Register */
+ u32 isr; /* 0x14:Flash Interrupt Status Register */
+ u32 imr; /* 0x18:Flash Interrupt Mask Register */
+ u32 fcr; /* 0x1C:NAND Flash FIFO Control Register */
+ u32 ffsr; /* 0x20:Flash FIFO Status Register */
+ u32 ffar; /* 0x24:Flash FIFO ADDRESS Register */
+ u32 ffmar; /* 0x28:Flash FIFO MATCHING ADDRESS Register */
+ u32 ffdr; /* 0x2C:Flash FIFO Data Register */
+ u32 ar; /* 0x30:Serial Flash Access Register */
+ u32 ear; /* 0x34:Serial Flash Extend Access Register */
+ u32 adr; /* 0x38:Serial Flash ADdress Register */
+ u32 dr; /* 0x3C:Serial Flash Data Register */
+ u32 tmr; /* 0x40:Serial Flash Timing Register */
+};
+
+/*
+ * FLASH_TYPE
+ */
+#define CA_FLASH_TR_PIN BIT(15)
+#define CA_FLASH_TR_TYPE_MASK GENMASK(14, 12)
+#define CA_FLASH_TR_TYPE(tp) (((tp) << 12) & CA_FLASH_TR_TYPE_MASK)
+#define CA_FLASH_TR_WIDTH BIT(11)
+#define CA_FLASH_TR_SIZE_MASK GENMASK(10, 9)
+#define CA_FLASH_TR_SIZE(sz) (((sz) << 9) & CA_FLASH_TR_SIZE_MASK)
+
+/*
+ * FLASH_FLASH_ACCESS_START
+ */
+#define CA_FLASH_ASR_IND_START_EN BIT(1)
+#define CA_FLASH_ASR_DMA_START_EN BIT(3)
+#define CA_FLASH_ASR_WR_ACCESS_EN BIT(9)
+
+/*
+ * FLASH_FLASH_INTERRUPT
+ */
+#define CA_FLASH_ISR_REG_IRQ BIT(1)
+#define CA_FLASH_ISR_FIFO_IRQ BIT(2)
+
+/*
+ * FLASH_SF_ACCESS
+ */
+#define CA_SF_AR_OPCODE_MASK GENMASK(7, 0)
+#define CA_SF_AR_OPCODE(op) ((op) << 0 & CA_SF_AR_OPCODE_MASK)
+#define CA_SF_AR_ACCODE_MASK GENMASK(11, 8)
+#define CA_SF_AR_ACCODE(ac) (((ac) << 8) & CA_SF_AR_ACCODE_MASK)
+#define CA_SF_AR_FORCE_TERM BIT(12)
+#define CA_SF_AR_FORCE_BURST BIT(13)
+#define CA_SF_AR_AUTO_MODE_EN BIT(15)
+#define CA_SF_AR_CHIP_EN_ALT BIT(16)
+#define CA_SF_AR_HI_SPEED_RD BIT(17)
+#define CA_SF_AR_MIO_INF_DC BIT(24)
+#define CA_SF_AR_MIO_INF_AC BIT(25)
+#define CA_SF_AR_MIO_INF_CC BIT(26)
+#define CA_SF_AR_DDR_MASK GENMASK(29, 28)
+#define CA_SF_AR_DDR(ddr) (((ddr) << 28) & CA_SF_AR_DDR_MASK)
+#define CA_SF_AR_MIO_INF_MASK GENMASK(31, 30)
+#define CA_SF_AR_MIO_INF(io) (((io) << 30) & CA_SF_AR_MIO_INF_MASK)
+
+/*
+ * FLASH_SF_EXT_ACCESS
+ */
+#define CA_SF_EAR_OPCODE_MASK GENMASK(7, 0)
+#define CA_SF_EAR_OPCODE(op) (((op) << 0) & CA_SF_EAR_OPCODE_MASK)
+#define CA_SF_EAR_DATA_CNT_MASK GENMASK(20, 8)
+#define CA_SF_EAR_DATA_CNT(cnt) (((cnt) << 8) & CA_SF_EAR_DATA_CNT_MASK)
+#define CA_SF_EAR_DATA_CNT_MAX (4096)
+#define CA_SF_EAR_ADDR_CNT_MASK GENMASK(23, 21)
+#define CA_SF_EAR_ADDR_CNT(cnt) (((cnt) << 21) & CA_SF_EAR_ADDR_CNT_MASK)
+#define CA_SF_EAR_ADDR_CNT_MAX (5)
+#define CA_SF_EAR_DUMY_CNT_MASK GENMASK(29, 24)
+#define CA_SF_EAR_DUMY_CNT(cnt) (((cnt) << 24) & CA_SF_EAR_DUMY_CNT_MASK)
+#define CA_SF_EAR_DUMY_CNT_MAX (32)
+#define CA_SF_EAR_DRD_CMD_EN BIT(31)
+
+/*
+ * FLASH_SF_ADDRESS
+ */
+#define CA_SF_ADR_REG_MASK GENMASK(31, 0)
+#define CA_SF_ADR_REG(addr) (((addr) << 0) & CA_SF_ADR_REG_MASK)
+
+/*
+ * FLASH_SF_DATA
+ */
+#define CA_SF_DR_REG_MASK GENMASK(31, 0)
+#define CA_SF_DR_REG(addr) (((addr) << 0) & CA_SF_DR_REG_MASK)
+
+/*
+ * FLASH_SF_TIMING
+ */
+#define CA_SF_TMR_IDLE_MASK GENMASK(7, 0)
+#define CA_SF_TMR_IDLE(idle) (((idle) << 0) & CA_SF_TMR_IDLE_MASK)
+#define CA_SF_TMR_HOLD_MASK GENMASK(15, 8)
+#define CA_SF_TMR_HOLD(hold) (((hold) << 8) & CA_SF_TMR_HOLD_MASK)
+#define CA_SF_TMR_SETUP_MASK GENMASK(23, 16)
+#define CA_SF_TMR_SETUP(setup) (((setup) << 16) & CA_SF_TMR_SETUP_MASK)
+#define CA_SF_TMR_CLK_MASK GENMASK(26, 24)
+#define CA_SF_TMR_CLK(clk) (((clk) << 24) & CA_SF_TMR_CLK_MASK)
+
+#define CA_SFLASH_IND_WRITE 0
+#define CA_SFLASH_IND_READ 1
+#define CA_SFLASH_MEM_MAP 3
+#define CA_SFLASH_FIFO_TIMEOUT_US 30000
+#define CA_SFLASH_BUSY_TIMEOUT_US 40000
+
+#define CA_SF_AC_OPCODE 0x00
+#define CA_SF_AC_OPCODE_1_DATA 0x01
+#define CA_SF_AC_OPCODE_2_DATA 0x02
+#define CA_SF_AC_OPCODE_3_DATA 0x03
+#define CA_SF_AC_OPCODE_4_DATA 0x04
+#define CA_SF_AC_OPCODE_3_ADDR 0x05
+#define CA_SF_AC_OPCODE_4_ADDR (CA_SF_AC_OPCODE_3_ADDR)
+#define CA_SF_AC_OPCODE_3_ADDR_1_DATA 0x06
+#define CA_SF_AC_OPCODE_4_ADDR_1_DATA (CA_SF_AC_OPCODE_3_ADDR_1_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_2_DATA 0x07
+#define CA_SF_AC_OPCODE_4_ADDR_2_DATA (CA_SF_AC_OPCODE_3_ADDR_2_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_3_DATA 0x08
+#define CA_SF_AC_OPCODE_4_ADDR_3_DATA (CA_SF_AC_OPCODE_3_ADDR_3_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_4_DATA 0x09
+#define CA_SF_AC_OPCODE_4_ADDR_4_DATA (CA_SF_AC_OPCODE_3_ADDR_4_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_X_1_DATA 0x0A
+#define CA_SF_AC_OPCODE_4_ADDR_X_1_DATA (CA_SF_AC_OPCODE_3_ADDR_X_1_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_X_2_DATA 0x0B
+#define CA_SF_AC_OPCODE_4_ADDR_X_2_DATA (CA_SF_AC_OPCODE_3_ADDR_X_2_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_X_3_DATA 0x0C
+#define CA_SF_AC_OPCODE_4_ADDR_X_3_DATA (CA_SF_AC_OPCODE_3_ADDR_X_3_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_X_4_DATA 0x0D
+#define CA_SF_AC_OPCODE_4_ADDR_X_4_DATA (CA_SF_AC_OPCODE_3_ADDR_X_4_DATA << 2)
+#define CA_SF_AC_OPCODE_3_ADDR_4X_1_DATA 0x0E
+#define CA_SF_AC_OPCODE_4_ADDR_4X_1_DATA (CA_SF_AC_OPCODE_3_ADDR_4X_1_DATA << 2)
+#define CA_SF_AC_OPCODE_EXTEND 0x0F
+
+#define CA_SF_ACCESS_MIO_SINGLE 0
+#define CA_SF_ACCESS_MIO_DUAL 1
+#define CA_SF_ACCESS_MIO_QUARD 2
+
+enum access_type {
+ RD_ACCESS,
+ WR_ACCESS,
+};
+
+struct ca_sflash_priv {
+ struct ca_sflash_regs *regs;
+ u8 rx_width;
+ u8 tx_width;
+};
+
+/*
+ * This function doesn't do anything except help with debugging
+ */
+static int ca_sflash_claim_bus(struct udevice *dev)
+{
+ debug("%s:\n", __func__);
+ return 0;
+}
+
+static int ca_sflash_release_bus(struct udevice *dev)
+{
+ debug("%s:\n", __func__);
+ return 0;
+}
+
+static int ca_sflash_set_speed(struct udevice *dev, uint speed)
+{
+ debug("%s:\n", __func__);
+ return 0;
+}
+
+static int ca_sflash_set_mode(struct udevice *dev, uint mode)
+{
+ struct ca_sflash_priv *priv = dev_get_priv(dev);
+
+ if (mode & SPI_RX_QUAD)
+ priv->rx_width = 4;
+ else if (mode & SPI_RX_DUAL)
+ priv->rx_width = 2;
+ else
+ priv->rx_width = 1;
+
+ if (mode & SPI_TX_QUAD)
+ priv->tx_width = 4;
+ else if (mode & SPI_TX_DUAL)
+ priv->tx_width = 2;
+ else
+ priv->tx_width = 1;
+
+ debug("%s: mode=%d, rx_width=%d, tx_width=%d\n",
+ __func__, mode, priv->rx_width, priv->tx_width);
+
+ return 0;
+}
+
+static int _ca_sflash_wait_for_not_busy(struct ca_sflash_priv *priv)
+{
+ u32 asr;
+
+ if (readl_poll_timeout(&priv->regs->asr, asr,
+ !(asr & CA_FLASH_ASR_IND_START_EN),
+ CA_SFLASH_BUSY_TIMEOUT_US)) {
+ pr_err("busy timeout (stat:%#x)\n", asr);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_wait_cmd(struct ca_sflash_priv *priv,
+ enum access_type type)
+{
+ if (type == WR_ACCESS) {
+ /* Enable write access and start the sflash indirect access */
+ clrsetbits_le32(&priv->regs->asr, GENMASK(31, 0),
+ CA_FLASH_ASR_WR_ACCESS_EN
+ | CA_FLASH_ASR_IND_START_EN);
+ } else if (type == RD_ACCESS) {
+ /* Start the sflash indirect access */
+ clrsetbits_le32(&priv->regs->asr, GENMASK(31, 0),
+ CA_FLASH_ASR_IND_START_EN);
+ } else {
+ printf("%s: !error access type.\n", __func__);
+ return -1;
+ }
+
+ /* Wait til the action(rd/wr) completed */
+ return _ca_sflash_wait_for_not_busy(priv);
+}
+
+static int _ca_sflash_read(struct ca_sflash_priv *priv,
+ u8 *buf, unsigned int data_len)
+{
+ u32 reg_data;
+ int len;
+
+ len = data_len;
+ while (len >= 4) {
+ if (_ca_sflash_wait_cmd(priv, RD_ACCESS))
+ return -1;
+ reg_data = readl(&priv->regs->dr);
+ *buf++ = reg_data & 0xFF;
+ *buf++ = (reg_data >> 8) & 0xFF;
+ *buf++ = (reg_data >> 16) & 0xFF;
+ *buf++ = (reg_data >> 24) & 0xFF;
+ len -= 4;
+ debug("%s: reg_data=%#08x\n",
+ __func__, reg_data);
+ }
+
+ if (len > 0) {
+ if (_ca_sflash_wait_cmd(priv, RD_ACCESS))
+ return -1;
+ reg_data = readl(&priv->regs->dr);
+ debug("%s: reg_data=%#08x\n",
+ __func__, reg_data);
+ }
+
+ switch (len) {
+ case 3:
+ *buf++ = reg_data & 0xFF;
+ *buf++ = (reg_data >> 8) & 0xFF;
+ *buf++ = (reg_data >> 16) & 0xFF;
+ break;
+ case 2:
+ *buf++ = reg_data & 0xFF;
+ *buf++ = (reg_data >> 8) & 0xFF;
+ break;
+ case 1:
+ *buf++ = reg_data & 0xFF;
+ break;
+ case 0:
+ break;
+ default:
+ printf("%s: error data_length %d!\n", __func__, len);
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_mio_set(struct ca_sflash_priv *priv,
+ u8 width)
+{
+ if (width == 4) {
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_MIO_INF_DC
+ | CA_SF_AR_MIO_INF(CA_SF_ACCESS_MIO_QUARD)
+ | CA_SF_AR_FORCE_BURST);
+ } else if (width == 2) {
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_MIO_INF_DC
+ | CA_SF_AR_MIO_INF(CA_SF_ACCESS_MIO_DUAL)
+ | CA_SF_AR_FORCE_BURST);
+ } else if (width == 1) {
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_MIO_INF(CA_SF_ACCESS_MIO_SINGLE)
+ | CA_SF_AR_FORCE_BURST);
+ } else {
+ printf("%s: error rx/tx width %d!\n", __func__, width);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_write(struct ca_sflash_priv *priv,
+ u8 *buf, unsigned int data_len)
+{
+ u32 reg_data;
+ int len;
+
+ len = data_len;
+ while (len > 0) {
+ reg_data = buf[0]
+ | (buf[1] << 8)
+ | (buf[2] << 16)
+ | (buf[3] << 24);
+
+ debug("%s: reg_data=%#08x\n",
+ __func__, reg_data);
+ /* Fill data */
+ clrsetbits_le32(&priv->regs->dr, GENMASK(31, 0), reg_data);
+
+ if (_ca_sflash_wait_cmd(priv, WR_ACCESS))
+ return -1;
+
+ len -= 4;
+ buf += 4;
+ }
+
+ return 0;
+}
+
+static int _ca_sflash_access_data(struct ca_sflash_priv *priv,
+ struct spi_mem_op *op)
+{
+ int total_cnt;
+ unsigned int len;
+ unsigned int data_cnt = op->data.nbytes;
+ u64 addr_offset = op->addr.val;
+ u8 addr_cnt = op->addr.nbytes;
+ u8 *data_buf = NULL;
+ u8 *buf = NULL;
+
+ if (op->data.dir == SPI_MEM_DATA_IN)
+ data_buf = (u8 *)op->data.buf.in;
+ else
+ data_buf = (u8 *)op->data.buf.out;
+
+ if (data_cnt > CA_SF_EAR_DATA_CNT_MAX)
+ buf = malloc(CA_SF_EAR_DATA_CNT_MAX);
+ else
+ buf = malloc(data_cnt);
+
+ total_cnt = data_cnt;
+ while (total_cnt > 0) {
+ /* Fill address */
+ if (addr_cnt > 0)
+ clrsetbits_le32(&priv->regs->adr,
+ GENMASK(31, 0), (u32)addr_offset);
+
+ if (total_cnt > CA_SF_EAR_DATA_CNT_MAX) {
+ len = CA_SF_EAR_DATA_CNT_MAX;
+ addr_offset += CA_SF_EAR_DATA_CNT_MAX;
+ /* Clear start bit before next bulk read */
+ clrbits_le32(&priv->regs->asr, GENMASK(31, 0));
+ } else {
+ len = total_cnt;
+ }
+
+ memset(buf, 0, len);
+ if (op->data.dir == SPI_MEM_DATA_IN) {
+ if (_ca_sflash_read(priv, buf, len))
+ break;
+ memcpy(data_buf, buf, len);
+ } else {
+ memcpy(buf, data_buf, len);
+ if (_ca_sflash_write(priv, buf, len))
+ break;
+ }
+
+ total_cnt -= len;
+ data_buf += len;
+ }
+ if (buf)
+ free(buf);
+
+ return total_cnt > 0 ? -1 : 0;
+}
+
+static int _ca_sflash_issue_cmd(struct ca_sflash_priv *priv,
+ struct spi_mem_op *op, u8 opcode)
+{
+ u8 dummy_cnt = op->dummy.nbytes;
+ u8 addr_cnt = op->addr.nbytes;
+ u8 mio_width;
+ unsigned int data_cnt = op->data.nbytes;
+ u64 addr_offset = op->addr.val;
+
+ /* Set the access register */
+ clrsetbits_le32(&priv->regs->ar,
+ GENMASK(31, 0), CA_SF_AR_ACCODE(opcode));
+
+ if (opcode == CA_SF_AC_OPCODE_EXTEND) { /* read_data, write_data */
+ if (data_cnt > 6) {
+ if (op->data.dir == SPI_MEM_DATA_IN)
+ mio_width = priv->rx_width;
+ else
+ mio_width = priv->tx_width;
+ if (_ca_sflash_mio_set(priv, mio_width))
+ return -1;
+ }
+ debug("%s: FLASH ACCESS reg=%#08x\n",
+ __func__, readl(&priv->regs->ar));
+
+ /* Use command in extend_access register */
+ clrsetbits_le32(&priv->regs->ear,
+ GENMASK(31, 0), CA_SF_EAR_OPCODE(op->cmd.opcode)
+ | CA_SF_EAR_DUMY_CNT(dummy_cnt * 8 - 1)
+ | CA_SF_EAR_ADDR_CNT(addr_cnt - 1)
+ | CA_SF_EAR_DATA_CNT(4 - 1)
+ | CA_SF_EAR_DRD_CMD_EN);
+ debug("%s: FLASH EXT ACCESS reg=%#08x\n",
+ __func__, readl(&priv->regs->ear));
+
+ if (_ca_sflash_access_data(priv, op))
+ return -1;
+ } else { /* reset_op, wr_enable, wr_disable */
+ setbits_le32(&priv->regs->ar,
+ CA_SF_AR_OPCODE(op->cmd.opcode));
+ debug("%s: FLASH ACCESS reg=%#08x\n",
+ __func__, readl(&priv->regs->ar));
+
+ if (opcode == CA_SF_AC_OPCODE_4_ADDR) { /* erase_op */
+ /* Configure address length */
+ if (addr_cnt > 3) /* 4 Bytes address */
+ setbits_le32(&priv->regs->tr,
+ CA_FLASH_TR_SIZE(2));
+ else /* 3 Bytes address */
+ clrbits_le32(&priv->regs->tr,
+ CA_FLASH_TR_SIZE_MASK);
+
+ /* Fill address */
+ if (addr_cnt > 0)
+ clrsetbits_le32(&priv->regs->adr,
+ GENMASK(31, 0),
+ (u32)addr_offset);
+ }
+
+ if (_ca_sflash_wait_cmd(priv, RD_ACCESS))
+ return -1;
+ }
+ /* elapse 10us before issuing any other command */
+ udelay(10);
+
+ return 0;
+}
+
+static int ca_sflash_exec_op(struct spi_slave *slave,
+ const struct spi_mem_op *op)
+{
+ struct ca_sflash_priv *priv = dev_get_priv(slave->dev->parent);
+ u8 opcode;
+
+ debug("%s: cmd:%#02x addr.val:%#llx addr.len:%#x data.len:%#x data.dir:%#x\n",
+ __func__, op->cmd.opcode, op->addr.val,
+ op->addr.nbytes, op->data.nbytes, op->data.dir);
+
+ if (op->data.nbytes == 0 && op->addr.nbytes == 0) {
+ opcode = CA_SF_AC_OPCODE;
+ } else if (op->data.nbytes == 0 && op->addr.nbytes > 0) {
+ opcode = CA_SF_AC_OPCODE_4_ADDR;
+ } else if (op->data.nbytes > 0) {
+ opcode = CA_SF_AC_OPCODE_EXTEND;
+ } else {
+ printf("%s: can't support cmd.opcode:(%#02x) type currently!\n",
+ __func__, op->cmd.opcode);
+ return -1;
+ }
+
+ return _ca_sflash_issue_cmd(priv, (struct spi_mem_op *)op, opcode);
+}
+
+static void ca_sflash_init(struct ca_sflash_priv *priv)
+{
+ /* Set FLASH_TYPE as serial flash, value: 0x0400*/
+ clrsetbits_le32(&priv->regs->tr,
+ GENMASK(31, 0), CA_FLASH_TR_SIZE(2));
+ debug("%s: FLASH_TYPE reg=%#x\n",
+ __func__, readl(&priv->regs->tr));
+
+ /* Minimize flash timing, value: 0x07010101 */
+ clrsetbits_le32(&priv->regs->tmr,
+ GENMASK(31, 0),
+ CA_SF_TMR_CLK(0x07)
+ | CA_SF_TMR_SETUP(0x01)
+ | CA_SF_TMR_HOLD(0x01)
+ | CA_SF_TMR_IDLE(0x01));
+ debug("%s: FLASH_TIMING reg=%#x\n",
+ __func__, readl(&priv->regs->tmr));
+}
+
+static int ca_sflash_probe(struct udevice *dev)
+{
+ struct ca_sflash_priv *priv = dev_get_priv(dev);
+ struct resource res;
+ int ret;
+
+ /* Map the registers */
+ ret = dev_read_resource_byname(dev, "sflash-regs", &res);
+ if (ret) {
+ dev_err(dev, "can't get regs base addresses(ret = %d)!\n", ret);
+ return ret;
+ }
+ priv->regs = devm_ioremap(dev, res.start, resource_size(&res));
+ if (IS_ERR(priv->regs))
+ return PTR_ERR(priv->regs);
+
+ ca_sflash_init(priv);
+
+ printf("SFLASH: Controller probed ready\n");
+ return 0;
+}
+
+static const struct spi_controller_mem_ops ca_sflash_mem_ops = {
+ .exec_op = ca_sflash_exec_op,
+};
+
+static const struct dm_spi_ops ca_sflash_ops = {
+ .claim_bus = ca_sflash_claim_bus,
+ .release_bus = ca_sflash_release_bus,
+ .set_speed = ca_sflash_set_speed,
+ .set_mode = ca_sflash_set_mode,
+ .mem_ops = &ca_sflash_mem_ops,
+};
+
+static const struct udevice_id ca_sflash_ids[] = {
+ {.compatible = "cortina,ca-sflash"},
+ {}
+};
+
+U_BOOT_DRIVER(ca_sflash) = {
+ .name = "ca_sflash",
+ .id = UCLASS_SPI,
+ .of_match = ca_sflash_ids,
+ .ops = &ca_sflash_ops,
+ .priv_auto_alloc_size = sizeof(struct ca_sflash_priv),
+ .probe = ca_sflash_probe,
+};
--
2.7.4