[PATCH 12/14] spi: airoha: Add Airoha SPI NAND driver
Christian Marangi
ansuelsmth at gmail.com
Wed Apr 2 00:51:44 CEST 2025
Add Airoha SPI NAND driver to permit usage of attached SNAND on the
Airoha AN7581 SoC. While SPI controller supports DMA transation, due to
U-Boot limitation we currently limit it to single command in Manual
mode.
Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
drivers/spi/Kconfig | 9 +
drivers/spi/Makefile | 1 +
drivers/spi/airoha_snfi_spi.c | 717 ++++++++++++++++++++++++++++++++++
3 files changed, 727 insertions(+)
create mode 100644 drivers/spi/airoha_snfi_spi.c
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 96ea033082b..b7626558d11 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -52,6 +52,15 @@ config SPI_DIRMAP
if DM_SPI
+config AIROHA_SNFI_SPI
+ bool "Airoha SPI memory controller driver"
+ depends on SPI_MEM
+ help
+ Enable the Airoha SPI memory controller driver. This driver is
+ originally based on the Airoha SNFI IP core. It can only be
+ used to access SPI memory devices like SPI-NOR or SPI-NAND on
+ platforms embedding this IP core, like AN7581.
+
config ALTERA_SPI
bool "Altera SPI driver"
help
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 7051e2a00c6..24cc92a7f98 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -19,6 +19,7 @@ obj-y += spi.o
obj-$(CONFIG_SPI_MEM) += spi-mem-nodm.o
endif
+obj-$(CONFIG_AIROHA_SNFI_SPI) += airoha_snfi_spi.o
obj-$(CONFIG_ALTERA_SPI) += altera_spi.o
obj-$(CONFIG_APPLE_SPI) += apple_spi.o
obj-$(CONFIG_ATH79_SPI) += ath79_spi.o
diff --git a/drivers/spi/airoha_snfi_spi.c b/drivers/spi/airoha_snfi_spi.c
new file mode 100644
index 00000000000..611a4f32590
--- /dev/null
+++ b/drivers/spi/airoha_snfi_spi.c
@@ -0,0 +1,717 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2024 AIROHA Inc
+ *
+ * Based on spi-airoha-snfi.c on Linux
+ *
+ * Author: Lorenzo Bianconi <lorenzo at kernel.org>
+ * Author: Ray Liu <ray.liu at airoha.com>
+ */
+
+#include <asm/unaligned.h>
+#include <clk.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <dm/devres.h>
+#include <linux/bitfield.h>
+#include <linux/dma-mapping.h>
+#include <linux/time.h>
+#include <regmap.h>
+#include <spi.h>
+#include <spi-mem.h>
+
+/* SPI */
+#define REG_SPI_CTRL_READ_MODE 0x0000
+#define REG_SPI_CTRL_READ_IDLE_EN 0x0004
+#define REG_SPI_CTRL_SIDLY 0x0008
+#define REG_SPI_CTRL_CSHEXT 0x000c
+#define REG_SPI_CTRL_CSLEXT 0x0010
+
+#define REG_SPI_CTRL_MTX_MODE_TOG 0x0014
+#define SPI_CTRL_MTX_MODE_TOG GENMASK(3, 0)
+
+#define REG_SPI_CTRL_RDCTL_FSM 0x0018
+#define SPI_CTRL_RDCTL_FSM GENMASK(3, 0)
+
+#define REG_SPI_CTRL_MACMUX_SEL 0x001c
+
+#define REG_SPI_CTRL_MANUAL_EN 0x0020
+#define SPI_CTRL_MANUAL_EN BIT(0)
+
+#define REG_SPI_CTRL_OPFIFO_EMPTY 0x0024
+#define SPI_CTRL_OPFIFO_EMPTY BIT(0)
+
+#define REG_SPI_CTRL_OPFIFO_WDATA 0x0028
+#define SPI_CTRL_OPFIFO_LEN GENMASK(8, 0)
+#define SPI_CTRL_OPFIFO_OP GENMASK(13, 9)
+
+#define REG_SPI_CTRL_OPFIFO_FULL 0x002c
+#define SPI_CTRL_OPFIFO_FULL BIT(0)
+
+#define REG_SPI_CTRL_OPFIFO_WR 0x0030
+#define SPI_CTRL_OPFIFO_WR BIT(0)
+
+#define REG_SPI_CTRL_DFIFO_FULL 0x0034
+#define SPI_CTRL_DFIFO_FULL BIT(0)
+
+#define REG_SPI_CTRL_DFIFO_WDATA 0x0038
+#define SPI_CTRL_DFIFO_WDATA GENMASK(7, 0)
+
+#define REG_SPI_CTRL_DFIFO_EMPTY 0x003c
+#define SPI_CTRL_DFIFO_EMPTY BIT(0)
+
+#define REG_SPI_CTRL_DFIFO_RD 0x0040
+#define SPI_CTRL_DFIFO_RD BIT(0)
+
+#define REG_SPI_CTRL_DFIFO_RDATA 0x0044
+#define SPI_CTRL_DFIFO_RDATA GENMASK(7, 0)
+
+#define REG_SPI_CTRL_DUMMY 0x0080
+#define SPI_CTRL_CTRL_DUMMY GENMASK(3, 0)
+
+#define REG_SPI_CTRL_PROBE_SEL 0x0088
+#define REG_SPI_CTRL_INTERRUPT 0x0090
+#define REG_SPI_CTRL_INTERRUPT_EN 0x0094
+#define REG_SPI_CTRL_SI_CK_SEL 0x009c
+#define REG_SPI_CTRL_SW_CFGNANDADDR_VAL 0x010c
+#define REG_SPI_CTRL_SW_CFGNANDADDR_EN 0x0110
+#define REG_SPI_CTRL_SFC_STRAP 0x0114
+
+#define REG_SPI_CTRL_NFI2SPI_EN 0x0130
+#define SPI_CTRL_NFI2SPI_EN BIT(0)
+
+/* NFI2SPI */
+#define REG_SPI_NFI_CNFG 0x0000
+#define SPI_NFI_DMA_MODE BIT(0)
+#define SPI_NFI_READ_MODE BIT(1)
+#define SPI_NFI_DMA_BURST_EN BIT(2)
+#define SPI_NFI_HW_ECC_EN BIT(8)
+#define SPI_NFI_AUTO_FDM_EN BIT(9)
+#define SPI_NFI_OPMODE GENMASK(14, 12)
+
+#define REG_SPI_NFI_PAGEFMT 0x0004
+#define SPI_NFI_PAGE_SIZE GENMASK(1, 0)
+#define SPI_NFI_SPARE_SIZE GENMASK(5, 4)
+
+#define REG_SPI_NFI_CON 0x0008
+#define SPI_NFI_FIFO_FLUSH BIT(0)
+#define SPI_NFI_RST BIT(1)
+#define SPI_NFI_RD_TRIG BIT(8)
+#define SPI_NFI_WR_TRIG BIT(9)
+#define SPI_NFI_SEC_NUM GENMASK(15, 12)
+
+#define REG_SPI_NFI_INTR_EN 0x0010
+#define SPI_NFI_RD_DONE_EN BIT(0)
+#define SPI_NFI_WR_DONE_EN BIT(1)
+#define SPI_NFI_RST_DONE_EN BIT(2)
+#define SPI_NFI_ERASE_DONE_EN BIT(3)
+#define SPI_NFI_BUSY_RETURN_EN BIT(4)
+#define SPI_NFI_ACCESS_LOCK_EN BIT(5)
+#define SPI_NFI_AHB_DONE_EN BIT(6)
+#define SPI_NFI_ALL_IRQ_EN \
+ (SPI_NFI_RD_DONE_EN | SPI_NFI_WR_DONE_EN | \
+ SPI_NFI_RST_DONE_EN | SPI_NFI_ERASE_DONE_EN | \
+ SPI_NFI_BUSY_RETURN_EN | SPI_NFI_ACCESS_LOCK_EN | \
+ SPI_NFI_AHB_DONE_EN)
+
+#define REG_SPI_NFI_INTR 0x0014
+#define SPI_NFI_AHB_DONE BIT(6)
+
+#define REG_SPI_NFI_CMD 0x0020
+
+#define REG_SPI_NFI_ADDR_NOB 0x0030
+#define SPI_NFI_ROW_ADDR_NOB GENMASK(6, 4)
+
+#define REG_SPI_NFI_STA 0x0060
+#define REG_SPI_NFI_FIFOSTA 0x0064
+#define REG_SPI_NFI_STRADDR 0x0080
+#define REG_SPI_NFI_FDM0L 0x00a0
+#define REG_SPI_NFI_FDM0M 0x00a4
+#define REG_SPI_NFI_FDM7L 0x00d8
+#define REG_SPI_NFI_FDM7M 0x00dc
+#define REG_SPI_NFI_FIFODATA0 0x0190
+#define REG_SPI_NFI_FIFODATA1 0x0194
+#define REG_SPI_NFI_FIFODATA2 0x0198
+#define REG_SPI_NFI_FIFODATA3 0x019c
+#define REG_SPI_NFI_MASTERSTA 0x0224
+
+#define REG_SPI_NFI_SECCUS_SIZE 0x022c
+#define SPI_NFI_CUS_SEC_SIZE GENMASK(12, 0)
+#define SPI_NFI_CUS_SEC_SIZE_EN BIT(16)
+
+#define REG_SPI_NFI_RD_CTL2 0x0510
+#define REG_SPI_NFI_RD_CTL3 0x0514
+
+#define REG_SPI_NFI_PG_CTL1 0x0524
+#define SPI_NFI_PG_LOAD_CMD GENMASK(15, 8)
+
+#define REG_SPI_NFI_PG_CTL2 0x0528
+#define REG_SPI_NFI_NOR_PROG_ADDR 0x052c
+#define REG_SPI_NFI_NOR_RD_ADDR 0x0534
+
+#define REG_SPI_NFI_SNF_MISC_CTL 0x0538
+#define SPI_NFI_DATA_READ_WR_MODE GENMASK(18, 16)
+
+#define REG_SPI_NFI_SNF_MISC_CTL2 0x053c
+#define SPI_NFI_READ_DATA_BYTE_NUM GENMASK(12, 0)
+#define SPI_NFI_PROG_LOAD_BYTE_NUM GENMASK(28, 16)
+
+#define REG_SPI_NFI_SNF_STA_CTL1 0x0550
+#define SPI_NFI_READ_FROM_CACHE_DONE BIT(25)
+#define SPI_NFI_LOAD_TO_CACHE_DONE BIT(26)
+
+#define REG_SPI_NFI_SNF_STA_CTL2 0x0554
+
+#define REG_SPI_NFI_SNF_NFI_CNFG 0x055c
+#define SPI_NFI_SPI_MODE BIT(0)
+
+/* SPI NAND Protocol OP */
+#define SPI_NAND_OP_GET_FEATURE 0x0f
+#define SPI_NAND_OP_SET_FEATURE 0x1f
+#define SPI_NAND_OP_PAGE_READ 0x13
+#define SPI_NAND_OP_READ_FROM_CACHE_SINGLE 0x03
+#define SPI_NAND_OP_READ_FROM_CACHE_SINGLE_FAST 0x0b
+#define SPI_NAND_OP_READ_FROM_CACHE_DUAL 0x3b
+#define SPI_NAND_OP_READ_FROM_CACHE_QUAD 0x6b
+#define SPI_NAND_OP_WRITE_ENABLE 0x06
+#define SPI_NAND_OP_WRITE_DISABLE 0x04
+#define SPI_NAND_OP_PROGRAM_LOAD_SINGLE 0x02
+#define SPI_NAND_OP_PROGRAM_LOAD_QUAD 0x32
+#define SPI_NAND_OP_PROGRAM_LOAD_RAMDOM_SINGLE 0x84
+#define SPI_NAND_OP_PROGRAM_LOAD_RAMDON_QUAD 0x34
+#define SPI_NAND_OP_PROGRAM_EXECUTE 0x10
+#define SPI_NAND_OP_READ_ID 0x9f
+#define SPI_NAND_OP_BLOCK_ERASE 0xd8
+#define SPI_NAND_OP_RESET 0xff
+#define SPI_NAND_OP_DIE_SELECT 0xc2
+
+#define SPI_NAND_CACHE_SIZE (SZ_4K + SZ_256)
+#define SPI_MAX_TRANSFER_SIZE 511
+
+enum airoha_snand_mode {
+ SPI_MODE_AUTO,
+ SPI_MODE_MANUAL,
+ SPI_MODE_DMA,
+};
+
+enum airoha_snand_cs {
+ SPI_CHIP_SEL_HIGH,
+ SPI_CHIP_SEL_LOW,
+};
+
+struct airoha_snand_priv {
+ struct regmap *regmap_ctrl;
+ struct regmap *regmap_nfi;
+ struct clk *spi_clk;
+
+ struct {
+ size_t page_size;
+ size_t sec_size;
+ u8 sec_num;
+ u8 spare_size;
+ } nfi_cfg;
+};
+
+static int airoha_snand_set_fifo_op(struct airoha_snand_priv *priv,
+ u8 op_cmd, int op_len)
+{
+ int err;
+ u32 val;
+
+ err = regmap_write(priv->regmap_ctrl, REG_SPI_CTRL_OPFIFO_WDATA,
+ FIELD_PREP(SPI_CTRL_OPFIFO_LEN, op_len) |
+ FIELD_PREP(SPI_CTRL_OPFIFO_OP, op_cmd));
+ if (err)
+ return err;
+
+ err = regmap_read_poll_timeout(priv->regmap_ctrl,
+ REG_SPI_CTRL_OPFIFO_FULL,
+ val, !(val & SPI_CTRL_OPFIFO_FULL),
+ 0, 250 * USEC_PER_MSEC);
+ if (err)
+ return err;
+
+ err = regmap_write(priv->regmap_ctrl, REG_SPI_CTRL_OPFIFO_WR,
+ SPI_CTRL_OPFIFO_WR);
+ if (err)
+ return err;
+
+ return regmap_read_poll_timeout(priv->regmap_ctrl,
+ REG_SPI_CTRL_OPFIFO_EMPTY,
+ val, (val & SPI_CTRL_OPFIFO_EMPTY),
+ 0, 250 * USEC_PER_MSEC);
+}
+
+static int airoha_snand_set_cs(struct airoha_snand_priv *priv, u8 cs)
+{
+ return airoha_snand_set_fifo_op(priv, cs, sizeof(cs));
+}
+
+static int airoha_snand_write_data_to_fifo(struct airoha_snand_priv *priv,
+ const u8 *data, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ int err;
+ u32 val;
+
+ /* 1. Wait until dfifo is not full */
+ err = regmap_read_poll_timeout(priv->regmap_ctrl,
+ REG_SPI_CTRL_DFIFO_FULL, val,
+ !(val & SPI_CTRL_DFIFO_FULL),
+ 0, 250 * USEC_PER_MSEC);
+ if (err)
+ return err;
+
+ /* 2. Write data to register DFIFO_WDATA */
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_DFIFO_WDATA,
+ FIELD_PREP(SPI_CTRL_DFIFO_WDATA, data[i]));
+ if (err)
+ return err;
+
+ /* 3. Wait until dfifo is not full */
+ err = regmap_read_poll_timeout(priv->regmap_ctrl,
+ REG_SPI_CTRL_DFIFO_FULL, val,
+ !(val & SPI_CTRL_DFIFO_FULL),
+ 0, 250 * USEC_PER_MSEC);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int airoha_snand_read_data_from_fifo(struct airoha_snand_priv *priv,
+ u8 *ptr, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ int err;
+ u32 val;
+
+ /* 1. wait until dfifo is not empty */
+ err = regmap_read_poll_timeout(priv->regmap_ctrl,
+ REG_SPI_CTRL_DFIFO_EMPTY, val,
+ !(val & SPI_CTRL_DFIFO_EMPTY),
+ 0, 250 * USEC_PER_MSEC);
+ if (err)
+ return err;
+
+ /* 2. read from dfifo to register DFIFO_RDATA */
+ err = regmap_read(priv->regmap_ctrl,
+ REG_SPI_CTRL_DFIFO_RDATA, &val);
+ if (err)
+ return err;
+
+ ptr[i] = FIELD_GET(SPI_CTRL_DFIFO_RDATA, val);
+ /* 3. enable register DFIFO_RD to read next byte */
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_DFIFO_RD, SPI_CTRL_DFIFO_RD);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int airoha_snand_set_mode(struct airoha_snand_priv *priv,
+ enum airoha_snand_mode mode)
+{
+ int err;
+
+ switch (mode) {
+ case SPI_MODE_MANUAL: {
+ u32 val;
+
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_NFI2SPI_EN, 0);
+ if (err)
+ return err;
+
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_READ_IDLE_EN, 0);
+ if (err)
+ return err;
+
+ err = regmap_read_poll_timeout(priv->regmap_ctrl,
+ REG_SPI_CTRL_RDCTL_FSM, val,
+ !(val & SPI_CTRL_RDCTL_FSM),
+ 0, 250 * USEC_PER_MSEC);
+ if (err)
+ return err;
+
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_MTX_MODE_TOG, 9);
+ if (err)
+ return err;
+
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_MANUAL_EN, SPI_CTRL_MANUAL_EN);
+ if (err)
+ return err;
+ break;
+ }
+ case SPI_MODE_DMA:
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_NFI2SPI_EN,
+ SPI_CTRL_MANUAL_EN);
+ if (err < 0)
+ return err;
+
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_MTX_MODE_TOG, 0x0);
+ if (err < 0)
+ return err;
+
+ err = regmap_write(priv->regmap_ctrl,
+ REG_SPI_CTRL_MANUAL_EN, 0x0);
+ if (err < 0)
+ return err;
+ break;
+ case SPI_MODE_AUTO:
+ default:
+ break;
+ }
+
+ return regmap_write(priv->regmap_ctrl, REG_SPI_CTRL_DUMMY, 0);
+}
+
+static int airoha_snand_write_data(struct airoha_snand_priv *priv, u8 cmd,
+ const u8 *data, int len)
+{
+ int i, data_len;
+
+ for (i = 0; i < len; i += data_len) {
+ int err;
+
+ data_len = min(len - i, SPI_MAX_TRANSFER_SIZE);
+ err = airoha_snand_set_fifo_op(priv, cmd, data_len);
+ if (err)
+ return err;
+
+ err = airoha_snand_write_data_to_fifo(priv, &data[i],
+ data_len);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int airoha_snand_read_data(struct airoha_snand_priv *priv, u8 *data,
+ int len)
+{
+ int i, data_len;
+
+ for (i = 0; i < len; i += data_len) {
+ int err;
+
+ data_len = min(len - i, SPI_MAX_TRANSFER_SIZE);
+ err = airoha_snand_set_fifo_op(priv, 0xc, data_len);
+ if (err)
+ return err;
+
+ err = airoha_snand_read_data_from_fifo(priv, &data[i],
+ data_len);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int airoha_snand_nfi_init(struct airoha_snand_priv *priv)
+{
+ int err;
+
+ /* switch to SNFI mode */
+ err = regmap_write(priv->regmap_nfi, REG_SPI_NFI_SNF_NFI_CNFG,
+ SPI_NFI_SPI_MODE);
+ if (err)
+ return err;
+
+ /* Enable DMA */
+ return regmap_update_bits(priv->regmap_nfi, REG_SPI_NFI_INTR_EN,
+ SPI_NFI_ALL_IRQ_EN, SPI_NFI_AHB_DONE_EN);
+}
+
+static int airoha_snand_nfi_config(struct airoha_snand_priv *priv)
+{
+ int err;
+ u32 val;
+
+ err = regmap_write(priv->regmap_nfi, REG_SPI_NFI_CON,
+ SPI_NFI_FIFO_FLUSH | SPI_NFI_RST);
+ if (err)
+ return err;
+
+ /* auto FDM */
+ err = regmap_clear_bits(priv->regmap_nfi, REG_SPI_NFI_CNFG,
+ SPI_NFI_AUTO_FDM_EN);
+ if (err)
+ return err;
+
+ /* HW ECC */
+ err = regmap_clear_bits(priv->regmap_nfi, REG_SPI_NFI_CNFG,
+ SPI_NFI_HW_ECC_EN);
+ if (err)
+ return err;
+
+ /* DMA Burst */
+ err = regmap_set_bits(priv->regmap_nfi, REG_SPI_NFI_CNFG,
+ SPI_NFI_DMA_BURST_EN);
+ if (err)
+ return err;
+
+ /* page format */
+ switch (priv->nfi_cfg.spare_size) {
+ case 26:
+ val = FIELD_PREP(SPI_NFI_SPARE_SIZE, 0x1);
+ break;
+ case 27:
+ val = FIELD_PREP(SPI_NFI_SPARE_SIZE, 0x2);
+ break;
+ case 28:
+ val = FIELD_PREP(SPI_NFI_SPARE_SIZE, 0x3);
+ break;
+ default:
+ val = FIELD_PREP(SPI_NFI_SPARE_SIZE, 0x0);
+ break;
+ }
+
+ err = regmap_update_bits(priv->regmap_nfi, REG_SPI_NFI_PAGEFMT,
+ SPI_NFI_SPARE_SIZE, val);
+ if (err)
+ return err;
+
+ switch (priv->nfi_cfg.page_size) {
+ case 2048:
+ val = FIELD_PREP(SPI_NFI_PAGE_SIZE, 0x1);
+ break;
+ case 4096:
+ val = FIELD_PREP(SPI_NFI_PAGE_SIZE, 0x2);
+ break;
+ default:
+ val = FIELD_PREP(SPI_NFI_PAGE_SIZE, 0x0);
+ break;
+ }
+
+ err = regmap_update_bits(priv->regmap_nfi, REG_SPI_NFI_PAGEFMT,
+ SPI_NFI_PAGE_SIZE, val);
+ if (err)
+ return err;
+
+ /* sec num */
+ val = FIELD_PREP(SPI_NFI_SEC_NUM, priv->nfi_cfg.sec_num);
+ err = regmap_update_bits(priv->regmap_nfi, REG_SPI_NFI_CON,
+ SPI_NFI_SEC_NUM, val);
+ if (err)
+ return err;
+
+ /* enable cust sec size */
+ err = regmap_set_bits(priv->regmap_nfi, REG_SPI_NFI_SECCUS_SIZE,
+ SPI_NFI_CUS_SEC_SIZE_EN);
+ if (err)
+ return err;
+
+ /* set cust sec size */
+ val = FIELD_PREP(SPI_NFI_CUS_SEC_SIZE, priv->nfi_cfg.sec_size);
+ return regmap_update_bits(priv->regmap_nfi,
+ REG_SPI_NFI_SECCUS_SIZE,
+ SPI_NFI_CUS_SEC_SIZE, val);
+}
+
+static int airoha_snand_adjust_op_size(struct spi_slave *slave,
+ struct spi_mem_op *op)
+{
+ size_t max_len;
+
+ max_len = 1 + op->addr.nbytes + op->dummy.nbytes;
+ if (max_len >= 160)
+ return -EOPNOTSUPP;
+
+ if (op->data.nbytes > 160 - max_len)
+ op->data.nbytes = 160 - max_len;
+
+ return 0;
+}
+
+static bool airoha_snand_supports_op(struct spi_slave *slave,
+ const struct spi_mem_op *op)
+{
+ if (!spi_mem_default_supports_op(slave, op))
+ return false;
+
+ if (op->cmd.buswidth != 1)
+ return false;
+
+ return (!op->addr.nbytes || op->addr.buswidth == 1) &&
+ (!op->dummy.nbytes || op->dummy.buswidth == 1) &&
+ (!op->data.nbytes || op->data.buswidth == 1);
+}
+
+static int airoha_snand_exec_op(struct spi_slave *slave,
+ const struct spi_mem_op *op)
+{
+ u8 data[8], cmd, opcode = op->cmd.opcode;
+ struct udevice *bus = slave->dev->parent;
+ struct airoha_snand_priv *priv;
+ int i, err;
+
+ priv = dev_get_priv(bus);
+
+ /* switch to manual mode */
+ err = airoha_snand_set_mode(priv, SPI_MODE_MANUAL);
+ if (err < 0)
+ return err;
+
+ err = airoha_snand_set_cs(priv, SPI_CHIP_SEL_LOW);
+ if (err < 0)
+ return err;
+
+ /* opcode */
+ err = airoha_snand_write_data(priv, 0x8, &opcode, sizeof(opcode));
+ if (err)
+ return err;
+
+ /* addr part */
+ cmd = opcode == SPI_NAND_OP_GET_FEATURE ? 0x11 : 0x8;
+ put_unaligned_be64(op->addr.val, data);
+
+ for (i = ARRAY_SIZE(data) - op->addr.nbytes;
+ i < ARRAY_SIZE(data); i++) {
+ err = airoha_snand_write_data(priv, cmd, &data[i],
+ sizeof(data[0]));
+ if (err)
+ return err;
+ }
+
+ /* dummy */
+ data[0] = 0xff;
+ for (i = 0; i < op->dummy.nbytes; i++) {
+ err = airoha_snand_write_data(priv, 0x8, &data[0],
+ sizeof(data[0]));
+ if (err)
+ return err;
+ }
+
+ /* data */
+ if (op->data.dir == SPI_MEM_DATA_IN) {
+ err = airoha_snand_read_data(priv, op->data.buf.in,
+ op->data.nbytes);
+ if (err)
+ return err;
+ } else {
+ err = airoha_snand_write_data(priv, 0x8, op->data.buf.out,
+ op->data.nbytes);
+ if (err)
+ return err;
+ }
+
+ return airoha_snand_set_cs(priv, SPI_CHIP_SEL_HIGH);
+}
+
+static int airoha_snand_probe(struct udevice *dev)
+{
+ struct airoha_snand_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = regmap_init_mem_index(dev_ofnode(dev), &priv->regmap_ctrl, 0);
+ if (ret) {
+ dev_err(dev, "failed to init spi ctrl regmap\n");
+ return ret;
+ }
+
+ ret = regmap_init_mem_index(dev_ofnode(dev), &priv->regmap_nfi, 1);
+ if (ret) {
+ dev_err(dev, "failed to init spi nfi regmap\n");
+ return ret;
+ }
+
+ priv->spi_clk = devm_clk_get(dev, "spi");
+ if (IS_ERR(priv->spi_clk)) {
+ dev_err(dev, "unable to get spi clk\n");
+ return PTR_ERR(priv->regmap_ctrl);
+ }
+ clk_enable(priv->spi_clk);
+
+ return airoha_snand_nfi_init(priv);
+}
+
+static int airoha_snand_nfi_set_speed(struct udevice *bus, uint speed)
+{
+ struct airoha_snand_priv *priv = dev_get_priv(bus);
+ int ret;
+
+ ret = clk_set_rate(priv->spi_clk, speed);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int airoha_snand_nfi_set_mode(struct udevice *bus, uint mode)
+{
+ return 0;
+}
+
+static int airoha_snand_nfi_setup(struct spi_slave *slave,
+ const struct spinand_info *spinand_info)
+{
+ struct udevice *bus = slave->dev->parent;
+ struct airoha_snand_priv *priv;
+ u32 sec_size, sec_num;
+ int pagesize, oobsize;
+
+ priv = dev_get_priv(bus);
+
+ pagesize = spinand_info->memorg.pagesize;
+ oobsize = spinand_info->memorg.oobsize;
+
+ if (pagesize == 2 * 1024)
+ sec_num = 4;
+ else if (pagesize == 4 * 1024)
+ sec_num = 8;
+ else
+ sec_num = 1;
+
+ sec_size = (pagesize + oobsize) / sec_num;
+
+ /* init default value */
+ priv->nfi_cfg.sec_size = sec_size;
+ priv->nfi_cfg.sec_num = sec_num;
+ priv->nfi_cfg.page_size = round_down(sec_size * sec_num, 1024);
+ priv->nfi_cfg.spare_size = 16;
+
+ return airoha_snand_nfi_config(priv);
+}
+
+static const struct spi_controller_mem_ops airoha_snand_mem_ops = {
+ .adjust_op_size = airoha_snand_adjust_op_size,
+ .supports_op = airoha_snand_supports_op,
+ .exec_op = airoha_snand_exec_op,
+};
+
+static const struct dm_spi_ops airoha_snfi_spi_ops = {
+ .mem_ops = &airoha_snand_mem_ops,
+ .set_speed = airoha_snand_nfi_set_speed,
+ .set_mode = airoha_snand_nfi_set_mode,
+ .setup_for_spinand = airoha_snand_nfi_setup,
+};
+
+static const struct udevice_id airoha_snand_ids[] = {
+ { .compatible = "airoha,en7581-snand" },
+ { }
+};
+
+U_BOOT_DRIVER(airoha_snfi_spi) = {
+ .name = "airoha-snfi-spi",
+ .id = UCLASS_SPI,
+ .of_match = airoha_snand_ids,
+ .ops = &airoha_snfi_spi_ops,
+ .priv_auto = sizeof(struct airoha_snand_priv),
+ .probe = airoha_snand_probe,
+};
--
2.48.1
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