[PATCH v4 1/2] mtd: rawnand: Add Macronix Raw NAND controller

Mason Yang
2019-06-25T05:48:40Z

Add a driver for Macronix raw NAND controller.

Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
---
drivers/mtd/nand/raw/Kconfig | 6 +
drivers/mtd/nand/raw/Makefile | 1 +
drivers/mtd/nand/raw/mxic_nand.c | 551 +++++++++++++++++++++++++++++++++++++++
3 files changed, 558 insertions(+)
create mode 100644 drivers/mtd/nand/raw/mxic_nand.c

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 5a711d8..9cff36a 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -407,6 +407,12 @@ config MTD_NAND_MTK
Enables support for NAND controller on MTK SoCs.
This controller is found on mt27xx, mt81xx, mt65xx SoCs.

+config MTD_NAND_MXIC
+ tristate "Macronix raw NAND controller"
+ depends on HAS_IOMEM || COMPILE_TEST
+ help
+ This selects the Macronix raw NAND controller driver.
+
config MTD_NAND_TEGRA
tristate "NVIDIA Tegra NAND controller"
depends on ARCH_TEGRA || COMPILE_TEST
diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index efaf5cd..9b43fbf 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -54,6 +54,7 @@ obj-$(CONFIG_MTD_NAND_HISI504) += hisi504_nand.o
obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand/
obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nandc.o
obj-$(CONFIG_MTD_NAND_MTK) += mtk_ecc.o mtk_nand.o
+obj-$(CONFIG_MTD_NAND_MXIC) += mxic_nand.o
obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_nand.o
obj-$(CONFIG_MTD_NAND_STM32_FMC2) += stm32_fmc2_nand.o
obj-$(CONFIG_MTD_NAND_MESON) += meson_nand.o
diff --git a/drivers/mtd/nand/raw/mxic_nand.c b/drivers/mtd/nand/raw/mxic_nand.c
new file mode 100644
index 0000000..14c0b3b
--- /dev/null
+++ b/drivers/mtd/nand/raw/mxic_nand.c
@@ -0,0 +1,551 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Macronix International Co., Ltd.
+ *
+ * Author:
+ * Mason Yang <masonccyang@mxic.com.tw>
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/platform_device.h>
+
+#include "internals.h"
+
+#define HC_CFG 0x0
+#define HC_CFG_IF_CFG(x) ((x) << 27)
+#define HC_CFG_DUAL_SLAVE BIT(31)
+#define HC_CFG_INDIVIDUAL BIT(30)
+#define HC_CFG_NIO(x) (((x) / 4) << 27)
+#define HC_CFG_TYPE(s, t) ((t) << (23 + ((s) * 2)))
+#define HC_CFG_TYPE_SPI_NOR 0
+#define HC_CFG_TYPE_SPI_NAND 1
+#define HC_CFG_TYPE_SPI_RAM 2
+#define HC_CFG_TYPE_RAW_NAND 3
+#define HC_CFG_SLV_ACT(x) ((x) << 21)
+#define HC_CFG_CLK_PH_EN BIT(20)
+#define HC_CFG_CLK_POL_INV BIT(19)
+#define HC_CFG_BIG_ENDIAN BIT(18)
+#define HC_CFG_DATA_PASS BIT(17)
+#define HC_CFG_IDLE_SIO_LVL(x) ((x) << 16)
+#define HC_CFG_MAN_START_EN BIT(3)
+#define HC_CFG_MAN_START BIT(2)
+#define HC_CFG_MAN_CS_EN BIT(1)
+#define HC_CFG_MAN_CS_ASSERT BIT(0)
+
+#define INT_STS 0x4
+#define INT_STS_EN 0x8
+#define INT_SIG_EN 0xc
+#define INT_STS_ALL GENMASK(31, 0)
+#define INT_RDY_PIN BIT(26)
+#define INT_RDY_SR BIT(25)
+#define INT_LNR_SUSP BIT(24)
+#define INT_ECC_ERR BIT(17)
+#define INT_CRC_ERR BIT(16)
+#define INT_LWR_DIS BIT(12)
+#define INT_LRD_DIS BIT(11)
+#define INT_SDMA_INT BIT(10)
+#define INT_DMA_FINISH BIT(9)
+#define INT_RX_NOT_FULL BIT(3)
+#define INT_RX_NOT_EMPTY BIT(2)
+#define INT_TX_NOT_FULL BIT(1)
+#define INT_TX_EMPTY BIT(0)
+
+#define HC_EN 0x10
+#define HC_EN_BIT BIT(0)
+
+#define TXD(x) (0x14 + ((x) * 4))
+#define RXD 0x24
+
+#define SS_CTRL(s) (0x30 + ((s) * 4))
+#define LRD_CFG 0x44
+#define LWR_CFG 0x80
+#define RWW_CFG 0x70
+#define OP_READ BIT(23)
+#define OP_DUMMY_CYC(x) ((x) << 17)
+#define OP_ADDR_BYTES(x) ((x) << 14)
+#define OP_CMD_BYTES(x) (((x) - 1) << 13)
+#define OP_OCTA_CRC_EN BIT(12)
+#define OP_DQS_EN BIT(11)
+#define OP_ENHC_EN BIT(10)
+#define OP_PREAMBLE_EN BIT(9)
+#define OP_DATA_DDR BIT(8)
+#define OP_DATA_BUSW(x) ((x) << 6)
+#define OP_ADDR_DDR BIT(5)
+#define OP_ADDR_BUSW(x) ((x) << 3)
+#define OP_CMD_DDR BIT(2)
+#define OP_CMD_BUSW(x) (x)
+#define OP_BUSW_1 0
+#define OP_BUSW_2 1
+#define OP_BUSW_4 2
+#define OP_BUSW_8 3
+
+#define OCTA_CRC 0x38
+#define OCTA_CRC_IN_EN(s) BIT(3 + ((s) * 16))
+#define OCTA_CRC_CHUNK(s, x) ((fls((x) / 32)) << (1 + ((s) * 16)))
+#define OCTA_CRC_OUT_EN(s) BIT(0 + ((s) * 16))
+
+#define ONFI_DIN_CNT(s) (0x3c + (s))
+
+#define LRD_CTRL 0x48
+#define RWW_CTRL 0x74
+#define LWR_CTRL 0x84
+#define LMODE_EN BIT(31)
+#define LMODE_SLV_ACT(x) ((x) << 21)
+#define LMODE_CMD1(x) ((x) << 8)
+#define LMODE_CMD0(x) (x)
+
+#define LRD_ADDR 0x4c
+#define LWR_ADDR 0x88
+#define LRD_RANGE 0x50
+#define LWR_RANGE 0x8c
+
+#define AXI_SLV_ADDR 0x54
+
+#define DMAC_RD_CFG 0x58
+#define DMAC_WR_CFG 0x94
+#define DMAC_CFG_PERIPH_EN BIT(31)
+#define DMAC_CFG_ALLFLUSH_EN BIT(30)
+#define DMAC_CFG_LASTFLUSH_EN BIT(29)
+#define DMAC_CFG_QE(x) (((x) + 1) << 16)
+#define DMAC_CFG_BURST_LEN(x) (((x) + 1) << 12)
+#define DMAC_CFG_BURST_SZ(x) ((x) << 8)
+#define DMAC_CFG_DIR_READ BIT(1)
+#define DMAC_CFG_START BIT(0)
+
+#define DMAC_RD_CNT 0x5c
+#define DMAC_WR_CNT 0x98
+
+#define SDMA_ADDR 0x60
+
+#define DMAM_CFG 0x64
+#define DMAM_CFG_START BIT(31)
+#define DMAM_CFG_CONT BIT(30)
+#define DMAM_CFG_SDMA_GAP(x) (fls((x) / 8192) << 2)
+#define DMAM_CFG_DIR_READ BIT(1)
+#define DMAM_CFG_EN BIT(0)
+
+#define DMAM_CNT 0x68
+
+#define LNR_TIMER_TH 0x6c
+
+#define RDM_CFG0 0x78
+#define RDM_CFG0_POLY(x) (x)
+
+#define RDM_CFG1 0x7c
+#define RDM_CFG1_RDM_EN BIT(31)
+#define RDM_CFG1_SEED(x) (x)
+
+#define LWR_SUSP_CTRL 0x90
+#define LWR_SUSP_CTRL_EN BIT(31)
+
+#define DMAS_CTRL 0x9c
+#define DMAS_CTRL_DIR_READ BIT(31)
+#define DMAS_CTRL_EN BIT(30)
+
+#define DATA_STROB 0xa0
+#define DATA_STROB_EDO_EN BIT(2)
+#define DATA_STROB_INV_POL BIT(1)
+#define DATA_STROB_DELAY_2CYC BIT(0)
+
+#define IDLY_CODE(x) (0xa4 + ((x) * 4))
+#define IDLY_CODE_VAL(x, v) ((v) << (((x) % 4) * 8))
+
+#define GPIO 0xc4
+#define GPIO_PT(x) BIT(3 + ((x) * 16))
+#define GPIO_RESET(x) BIT(2 + ((x) * 16))
+#define GPIO_HOLDB(x) BIT(1 + ((x) * 16))
+#define GPIO_WPB(x) BIT((x) * 16)
+
+#define HC_VER 0xd0
+
+#define HW_TEST(x) (0xe0 + ((x) * 4))
+
+#define MXIC_NFC_MAX_CLK_HZ 50000000
+
+struct mxic_nand_ctlr {
+ struct clk *ps_clk;
+ struct clk *send_clk;
+ struct clk *send_dly_clk;
+ void __iomem *regs;
+ struct nand_controller controller;
+ void *priv;
+};
+
+struct mxic_nand_chip {
+ struct nand_chip chip;
+};
+
+static int mxic_nfc_clk_enable(struct mxic_nand_ctlr *nfc)
+{
+ int ret;
+
+ ret = clk_prepare_enable(nfc->send_clk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(nfc->send_dly_clk);
+ if (ret)
+ goto err_send_dly_clk;
+
+ return ret;
+
+err_send_dly_clk:
+ clk_disable_unprepare(nfc->send_clk);
+
+ return ret;
+}
+
+static void mxic_nfc_clk_disable(struct mxic_nand_ctlr *nfc)
+{
+ clk_disable_unprepare(nfc->send_clk);
+ clk_disable_unprepare(nfc->send_dly_clk);
+}
+
+static void mxic_nfc_set_input_delay(struct mxic_nand_ctlr *nfc, u8 idly_code)
+{
+ writel(IDLY_CODE_VAL(0, idly_code) |
+ IDLY_CODE_VAL(1, idly_code) |
+ IDLY_CODE_VAL(2, idly_code) |
+ IDLY_CODE_VAL(3, idly_code),
+ nfc->regs + IDLY_CODE(0));
+ writel(IDLY_CODE_VAL(4, idly_code) |
+ IDLY_CODE_VAL(5, idly_code) |
+ IDLY_CODE_VAL(6, idly_code) |
+ IDLY_CODE_VAL(7, idly_code),
+ nfc->regs + IDLY_CODE(1));
+}
+
+static int mxic_nfc_clk_setup(struct mxic_nand_ctlr *nfc, unsigned long freq)
+{
+ int ret;
+
+ ret = clk_set_rate(nfc->send_clk, freq);
+ if (ret)
+ return ret;
+
+ ret = clk_set_rate(nfc->send_dly_clk, freq);
+ if (ret)
+ return ret;
+
+ /*
+ * A constant delay range from 0x0 ~ 0x1F for input delay,
+ * the unit is 78 ps, the max input delay is 2.418 ns.
+ */
+ mxic_nfc_set_input_delay(nfc, 0xf);
+
+ /*
+ * Phase degree = 360 * freq * output-delay
+ * where output-delay is a constant value 1 ns in FPGA.
+ *
+ * Get Phase degree = 360 * freq * 1 ns
+ * = 360 * freq * 1 sec / 1000000000
+ * = 9 * freq / 25000000
+ */
+ ret = clk_set_phase(nfc->send_dly_clk, 9 * freq / 25000000);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int mxic_nfc_set_freq(struct mxic_nand_ctlr *nfc, unsigned long freq)
+{
+ int ret;
+
+ if (freq > MXIC_NFC_MAX_CLK_HZ)
+ freq = MXIC_NFC_MAX_CLK_HZ;
+
+ mxic_nfc_clk_disable(nfc);
+ ret = mxic_nfc_clk_setup(nfc, freq);
+ if (ret)
+ return ret;
+
+ ret = mxic_nfc_clk_enable(nfc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void mxic_nfc_hw_init(struct mxic_nand_ctlr *nfc)
+{
+ writel(DATA_STROB_EDO_EN, nfc->regs + DATA_STROB);
+ writel(HC_CFG_NIO(8) | HC_CFG_TYPE(1, HC_CFG_TYPE_RAW_NAND) |
+ HC_CFG_SLV_ACT(0) | HC_CFG_MAN_CS_EN |
+ HC_CFG_IDLE_SIO_LVL(1), nfc->regs + HC_CFG);
+ writel(INT_STS_ALL, nfc->regs + INT_STS_EN);
+ writel(0x0, nfc->regs + ONFI_DIN_CNT(0));
+ writel(0, nfc->regs + LRD_CFG);
+ writel(0, nfc->regs + LRD_CTRL);
+ writel(0x0, nfc->regs + HC_EN);
+
+ /* Default 10 MHz to setup tRC_min/tWC_min:100 ns */
+ mxic_nfc_set_freq(nfc, 10000000);
+}
+
+static void mxic_nfc_cs_enable(struct mxic_nand_ctlr *nfc)
+{
+ writel(readl(nfc->regs + HC_CFG) | HC_CFG_MAN_CS_EN,
+ nfc->regs + HC_CFG);
+ writel(HC_CFG_MAN_CS_ASSERT | readl(nfc->regs + HC_CFG),
+ nfc->regs + HC_CFG);
+}
+
+static void mxic_nfc_cs_disable(struct mxic_nand_ctlr *nfc)
+{
+ writel(~HC_CFG_MAN_CS_ASSERT & readl(nfc->regs + HC_CFG),
+ nfc->regs + HC_CFG);
+}
+
+static int mxic_nfc_wait_ready(struct nand_chip *chip)
+{
+ struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+ u32 sts;
+
+ return readl_poll_timeout(nfc->regs + INT_STS, sts,
+ sts & INT_RDY_PIN, 0, USEC_PER_SEC);
+}
+
+static int mxic_nfc_data_xfer(struct mxic_nand_ctlr *nfc, const void *txbuf,
+ void *rxbuf, unsigned int len)
+{
+ unsigned int pos = 0;
+
+ while (pos < len) {
+ unsigned int nbytes = len - pos;
+ u32 data = 0xffffffff;
+ u32 sts;
+ int ret;
+
+ if (nbytes > 4)
+ nbytes = 4;
+
+ if (txbuf)
+ memcpy(&data, txbuf + pos, nbytes);
+
+ ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+ sts & INT_TX_EMPTY, 0, USEC_PER_SEC);
+ if (ret)
+ return ret;
+
+ writel(data, nfc->regs + TXD(nbytes % 4));
+
+ if (rxbuf) {
+ ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+ sts & INT_TX_EMPTY, 0,
+ USEC_PER_SEC);
+ if (ret)
+ return ret;
+
+ ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+ sts & INT_RX_NOT_EMPTY, 0,
+ USEC_PER_SEC);
+ if (ret)
+ return ret;
+
+ data = readl(nfc->regs + RXD);
+ data >>= (8 * (4 - nbytes));
+ memcpy(rxbuf + pos, &data, nbytes);
+ WARN_ON(readl(nfc->regs + INT_STS) & INT_RX_NOT_EMPTY);
+ } else {
+ readl(nfc->regs + RXD);
+ }
+ WARN_ON(readl(nfc->regs + INT_STS) & INT_RX_NOT_EMPTY);
+
+ pos += nbytes;
+ }
+
+ return 0;
+}
+
+static int mxic_nfc_exec_op(struct nand_chip *chip,
+ const struct nand_operation *op, bool check_only)
+{
+ struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+ const struct nand_op_instr *instr = NULL;
+ int ret = 0;
+ unsigned int op_id;
+
+ mxic_nfc_cs_enable(nfc);
+
+ for (op_id = 0; op_id < op->ninstrs; op_id++) {
+ instr = &op->instrs[op_id];
+
+ switch (instr->type) {
+ case NAND_OP_CMD_INSTR:
+ writel(0, nfc->regs + HC_EN);
+ writel(HC_EN_BIT, nfc->regs + HC_EN);
+ writel(OP_CMD_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) |
+ OP_CMD_BYTES(0), nfc->regs + SS_CTRL(0));
+
+ ret = mxic_nfc_data_xfer(nfc,
+ &instr->ctx.cmd.opcode,
+ NULL, 1);
+ break;
+
+ case NAND_OP_ADDR_INSTR:
+ writel(OP_ADDR_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) |
+ OP_ADDR_BYTES(instr->ctx.addr.naddrs),
+ nfc->regs + SS_CTRL(0));
+ ret = mxic_nfc_data_xfer(nfc,
+ instr->ctx.addr.addrs, NULL,
+ instr->ctx.addr.naddrs);
+ break;
+
+ case NAND_OP_DATA_IN_INSTR:
+ writel(0x0, nfc->regs + ONFI_DIN_CNT(0));
+ writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) |
+ OP_READ, nfc->regs + SS_CTRL(0));
+ ret = mxic_nfc_data_xfer(nfc, NULL,
+ instr->ctx.data.buf.in,
+ instr->ctx.data.len);
+ break;
+
+ case NAND_OP_DATA_OUT_INSTR:
+ writel(instr->ctx.data.len,
+ nfc->regs + ONFI_DIN_CNT(0));
+ writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F),
+ nfc->regs + SS_CTRL(0));
+ ret = mxic_nfc_data_xfer(nfc,
+ instr->ctx.data.buf.out, NULL,
+ instr->ctx.data.len);
+ break;
+
+ case NAND_OP_WAITRDY_INSTR:
+ ret = mxic_nfc_wait_ready(chip);
+ break;
+ }
+ }
+
+ mxic_nfc_cs_disable(nfc);
+ return ret;
+}
+
+static int mxic_nfc_setup_data_interface(struct nand_chip *chip, int chipnr,
+ const struct nand_data_interface *conf)
+{
+ struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+ const struct nand_sdr_timings *sdr;
+ unsigned long freq;
+
+ sdr = nand_get_sdr_timings(conf);
+ if (IS_ERR(sdr))
+ return PTR_ERR(sdr);
+
+ if (chipnr < 0)
+ return 0;
+
+ if (sdr->tRC_min)
+ freq = 1000000000 / (sdr->tRC_min / 1000);
+
+ return mxic_nfc_set_freq(nfc, freq);
+}
+
+static const struct nand_controller_ops mxic_nand_controller_ops = {
+ .exec_op = mxic_nfc_exec_op,
+ .setup_data_interface = mxic_nfc_setup_data_interface,
+};
+
+static int mxic_nfc_probe(struct platform_device *pdev)
+{
+ struct mtd_info *mtd;
+ struct mxic_nand_ctlr *nfc;
+ struct mxic_nand_chip *mxic_nand;
+ struct nand_chip *nand_chip;
+ struct resource *res;
+ int err;
+
+ nfc = devm_kzalloc(&pdev->dev, sizeof(struct mxic_nand_ctlr),
+ GFP_KERNEL);
+ if (!nfc)
+ return -ENOMEM;
+
+ mxic_nand = devm_kzalloc(&pdev->dev, sizeof(struct mxic_nand_chip),
+ GFP_KERNEL);
+ if (!mxic_nand)
+ return -ENOMEM;
+
+ nfc->ps_clk = devm_clk_get(&pdev->dev, "ps_clk");
+ if (IS_ERR(nfc->ps_clk))
+ return PTR_ERR(nfc->ps_clk);
+
+ nfc->send_clk = devm_clk_get(&pdev->dev, "send_clk");
+ if (IS_ERR(nfc->send_clk))
+ return PTR_ERR(nfc->send_clk);
+
+ nfc->send_dly_clk = devm_clk_get(&pdev->dev, "send_dly_clk");
+ if (IS_ERR(nfc->send_dly_clk))
+ return PTR_ERR(nfc->send_dly_clk);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
+ nfc->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(nfc->regs))
+ return PTR_ERR(nfc->regs);
+
+ nand_chip = &mxic_nand->chip;
+ mtd = nand_to_mtd(nand_chip);
+ mtd->dev.parent = &pdev->dev;
+ nand_chip->ecc.priv = NULL;
+ nand_set_flash_node(nand_chip, pdev->dev.of_node);
+ nand_chip->priv = nfc;
+ nfc->priv = nand_chip;
+
+ nfc->controller.ops = &mxic_nand_controller_ops;
+ nand_controller_init(&nfc->controller);
+ nand_chip->controller = &nfc->controller;
+
+ mxic_nfc_hw_init(nfc);
+
+ err = nand_scan(nand_chip, 1);
+ if (err)
+ goto fail;
+
+ err = mtd_device_register(mtd, NULL, 0);
+ if (err)
+ goto fail;
+
+ platform_set_drvdata(pdev, nfc);
+ return 0;
+
+fail:
+ mxic_nfc_clk_disable(nfc);
+ clk_disable_unprepare(nfc->ps_clk);
+ return err;
+}
+
+static int mxic_nfc_remove(struct platform_device *pdev)
+{
+ struct mxic_nand_ctlr *nfc = platform_get_drvdata(pdev);
+
+ nand_release(nfc->priv);
+ mxic_nfc_clk_disable(nfc);
+ clk_disable_unprepare(nfc->ps_clk);
+
+ return 0;
+}
+
+static const struct of_device_id mxic_nfc_of_ids[] = {
+ { .compatible = "mxic,raw-nand-ctlr", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mxic_nfc_of_ids);
+
+static struct platform_driver mxic_nfc_driver = {
+ .probe = mxic_nfc_probe,
+ .remove = mxic_nfc_remove,
+ .driver = {
+ .name = "mxic-nfc",
+ .of_match_table = mxic_nfc_of_ids,
+ },
+};
+module_platform_driver(mxic_nfc_driver);
+
+MODULE_AUTHOR("Mason Yang <masonccyang@mxic.com.tw>");
+MODULE_DESCRIPTION("Macronix RAW NAND Flash Controller driver");
+MODULE_LICENSE("GPL v2");
--
1.9.1