Add a driver for Macronix raw NAND controller. Signed-off-by: Mason Yang <masonccyang@xxxxxxxxxxx> --- drivers/mtd/nand/raw/Kconfig | 6 + drivers/mtd/nand/raw/Makefile | 1 + drivers/mtd/nand/raw/mxic_nand.c | 557 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 564 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..2c27228 --- /dev/null +++ b/drivers/mtd/nand/raw/mxic_nand.c @@ -0,0 +1,557 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Macronix International Co., Ltd. + * + * Author: + * Mason Yang <masonccyang@xxxxxxxxxxx> + */ + +#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_EN BIT(31) +#define DMAS_CTRL_DIR_READ 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; + struct device *dev; + 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->ps_clk); + if (ret) + return ret; + + ret = clk_prepare_enable(nfc->send_clk); + if (ret) + goto err_ps_clk; + + 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); +err_ps_clk: + clk_disable_unprepare(nfc->ps_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); + clk_disable_unprepare(nfc->ps_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); + if (readl(nfc->regs + INT_STS) & INT_RX_NOT_EMPTY) + dev_warn(nfc->dev, "RX FIFO not empty\n"); + } else { + readl(nfc->regs + RXD); + } + if (readl(nfc->regs + INT_STS) & INT_RX_NOT_EMPTY) + dev_warn(nfc->dev, "RX FIFO not empty\n"); + 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->dev = &pdev->dev; + 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); + 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); + return 0; +} + +static const struct of_device_id mxic_nfc_of_ids[] = { + { .compatible = "macronix,nand-controller", }, + {}, +}; +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@xxxxxxxxxxx>"); +MODULE_DESCRIPTION("Macronix RAW NAND Flash Controller driver"); +MODULE_LICENSE("GPL v2"); -- 1.9.1