diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 1494c91763..e317d8a2c6 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -255,6 +255,13 @@ config MXS_SPI Enable the MXS SPI controller driver. This driver can be used on the i.MX23 and i.MX28 SoCs. +config SPI_MXIC + bool "Macronix MX25F0A SPI controller" + help + Enable the Macronix MX25F0A SPI controller driver. This driver + can be used to access the SPI flash on platforms embedding + this Macronix IP core. + config NXP_FSPI bool "NXP FlexSPI driver" depends on SPI_MEM diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index cfe4fae1d4..3dc83089b8 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_OMAP3_SPI) += omap3_spi.o obj-$(CONFIG_PIC32_SPI) += pic32_spi.o obj-$(CONFIG_PL022_SPI) += pl022_spi.o obj-$(CONFIG_SPI_QUP) += spi-qup.o +obj-$(CONFIG_SPI_MXIC) += spi-mxic.o obj-$(CONFIG_RENESAS_RPC_SPI) += renesas_rpc_spi.o obj-$(CONFIG_ROCKCHIP_SPI) += rk_spi.o obj-$(CONFIG_SANDBOX_SPI) += sandbox_spi.o diff --git a/drivers/spi/spi-mxic.c b/drivers/spi/spi-mxic.c new file mode 100644 index 0000000000..6aae9f7955 --- /dev/null +++ b/drivers/spi/spi-mxic.c @@ -0,0 +1,547 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 Macronix International Co., Ltd. + * + * Authors: + * zhengxunli + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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)) + +struct mxic_spi_priv { + struct clk *send_clk; + struct clk *send_dly_clk; + void __iomem *regs; + u32 cur_speed_hz; +}; + +static int mxic_spi_clk_enable(struct mxic_spi_priv *priv) +{ + int ret; + + ret = clk_prepare_enable(priv->send_clk); + if (ret) + return ret; + + ret = clk_prepare_enable(priv->send_dly_clk); + if (ret) + goto err_send_dly_clk; + + return ret; + +err_send_dly_clk: + clk_disable_unprepare(priv->send_clk); + + return ret; +} + +static void mxic_spi_clk_disable(struct mxic_spi_priv *priv) +{ + clk_disable_unprepare(priv->send_clk); + clk_disable_unprepare(priv->send_dly_clk); +} + +static void mxic_spi_set_input_delay_dqs(struct mxic_spi_priv *priv, + 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), + priv->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), + priv->regs + IDLY_CODE(1)); +} + +static int mxic_spi_clk_setup(struct mxic_spi_priv *priv, uint freq) +{ + int ret; + + ret = clk_set_rate(priv->send_clk, freq); + if (ret) + return ret; + + ret = clk_set_rate(priv->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_spi_set_input_delay_dqs(priv, 0xf); + + return 0; +} + +static int mxic_spi_set_speed(struct udevice *bus, uint freq) +{ + struct mxic_spi_priv *priv = dev_get_priv(bus); + int ret; + + if (priv->cur_speed_hz == freq) + return 0; + + mxic_spi_clk_disable(priv); + ret = mxic_spi_clk_setup(priv, freq); + if (ret) + return ret; + + ret = mxic_spi_clk_enable(priv); + if (ret) + return ret; + + priv->cur_speed_hz = freq; + + return 0; +} + +static int mxic_spi_set_mode(struct udevice *bus, uint mode) +{ + struct mxic_spi_priv *priv = dev_get_priv(bus); + u32 hc_config = 0; + + if (mode & SPI_CPHA) + hc_config |= HC_CFG_CLK_PH_EN; + if (mode & SPI_CPOL) + hc_config |= HC_CFG_CLK_POL_INV; + + writel(hc_config, priv->regs + HC_CFG); + + return 0; +} + +static void mxic_spi_hw_init(struct mxic_spi_priv *priv) +{ + writel(0, priv->regs + DATA_STROB); + writel(INT_STS_ALL, priv->regs + INT_STS_EN); + writel(0, priv->regs + HC_EN); + writel(0, priv->regs + LRD_CFG); + writel(0, priv->regs + LRD_CTRL); + writel(HC_CFG_NIO(1) | HC_CFG_TYPE(0, HC_CFG_TYPE_SPI_NOR) | + HC_CFG_SLV_ACT(0) | HC_CFG_MAN_CS_EN | HC_CFG_IDLE_SIO_LVL(1), + priv->regs + HC_CFG); +} + +static int mxic_spi_data_xfer(struct mxic_spi_priv *priv, 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(priv->regs + INT_STS, sts, + sts & INT_TX_EMPTY, 1000000); + if (ret) + return ret; + + writel(data, priv->regs + TXD(nbytes % 4)); + + if (rxbuf) { + ret = readl_poll_timeout(priv->regs + INT_STS, sts, + sts & INT_TX_EMPTY, + 1000000); + if (ret) + return ret; + + ret = readl_poll_timeout(priv->regs + INT_STS, sts, + sts & INT_RX_NOT_EMPTY, + 1000000); + if (ret) + return ret; + + data = readl(priv->regs + RXD); + data >>= (8 * (4 - nbytes)); + memcpy(rxbuf + pos, &data, nbytes); + WARN_ON(readl(priv->regs + INT_STS) & INT_RX_NOT_EMPTY); + } else { + readl(priv->regs + RXD); + } + WARN_ON(readl(priv->regs + INT_STS) & INT_RX_NOT_EMPTY); + + pos += nbytes; + } + + return 0; +} + +static bool mxic_spi_mem_supports_op(struct spi_slave *slave, + const struct spi_mem_op *op) +{ + if (op->data.buswidth > 8 || op->addr.buswidth > 8 || + op->dummy.buswidth > 8 || op->cmd.buswidth > 8) + return false; + + if (op->addr.nbytes > 7) + return false; + + return spi_mem_default_supports_op(slave, op); +} + +static int mxic_spi_mem_exec_op(struct spi_slave *slave, + const struct spi_mem_op *op) +{ + struct dm_spi_slave_plat *slave_plat = dev_get_parent_plat(slave->dev); + struct udevice *bus = slave->dev->parent; + struct mxic_spi_priv *priv = dev_get_priv(bus); + int nio = 1, i, ret; + u32 ss_ctrl; + u8 addr[8], dummy_bytes = 0; + + if (slave->mode & (SPI_TX_OCTAL | SPI_RX_OCTAL)) + nio = 8; + else if (slave->mode & (SPI_TX_QUAD | SPI_RX_QUAD)) + nio = 4; + else if (slave->mode & (SPI_TX_DUAL | SPI_RX_DUAL)) + nio = 2; + + writel(HC_CFG_NIO(nio) | + HC_CFG_TYPE(slave_plat->cs, HC_CFG_TYPE_SPI_NOR) | + HC_CFG_SLV_ACT(slave_plat->cs) | HC_CFG_IDLE_SIO_LVL(1) | + HC_CFG_MAN_CS_EN, + priv->regs + HC_CFG); + writel(HC_EN_BIT, priv->regs + HC_EN); + + ss_ctrl = OP_CMD_BYTES(1) | OP_CMD_BUSW(fls(op->cmd.buswidth) - 1); + + if (op->addr.nbytes) + ss_ctrl |= OP_ADDR_BYTES(op->addr.nbytes) | + OP_ADDR_BUSW(fls(op->addr.buswidth) - 1); + + /* + * Since the SPI MXIC dummy buswidth is aligned with the data buswidth, + * the dummy byte needs to be recalculated to send out the correct + * dummy cycle. + */ + if (op->dummy.nbytes) { + dummy_bytes = op->dummy.nbytes / + op->addr.buswidth * + op->data.buswidth; + ss_ctrl |= OP_DUMMY_CYC(dummy_bytes); + } + + if (op->data.nbytes) { + ss_ctrl |= OP_DATA_BUSW(fls(op->data.buswidth) - 1); + if (op->data.dir == SPI_MEM_DATA_IN) + ss_ctrl |= OP_READ; + } + + writel(ss_ctrl, priv->regs + SS_CTRL(slave_plat->cs)); + + writel(readl(priv->regs + HC_CFG) | HC_CFG_MAN_CS_ASSERT, + priv->regs + HC_CFG); + + ret = mxic_spi_data_xfer(priv, &op->cmd.opcode, NULL, 1); + if (ret) + goto out; + + for (i = 0; i < op->addr.nbytes; i++) + addr[i] = op->addr.val >> (8 * (op->addr.nbytes - i - 1)); + + ret = mxic_spi_data_xfer(priv, addr, NULL, op->addr.nbytes); + if (ret) + goto out; + + ret = mxic_spi_data_xfer(priv, NULL, NULL, dummy_bytes); + if (ret) + goto out; + + ret = mxic_spi_data_xfer(priv, + op->data.dir == SPI_MEM_DATA_OUT ? + op->data.buf.out : NULL, + op->data.dir == SPI_MEM_DATA_IN ? + op->data.buf.in : NULL, + op->data.nbytes); + +out: + writel(readl(priv->regs + HC_CFG) & ~HC_CFG_MAN_CS_ASSERT, + priv->regs + HC_CFG); + writel(0, priv->regs + HC_EN); + + return ret; +} + +static const struct spi_controller_mem_ops mxic_spi_mem_ops = { + .supports_op = mxic_spi_mem_supports_op, + .exec_op = mxic_spi_mem_exec_op, +}; + +static int mxic_spi_claim_bus(struct udevice *dev) +{ + struct udevice *bus = dev_get_parent(dev); + struct mxic_spi_priv *priv = dev_get_priv(bus); + + writel(readl(priv->regs + HC_CFG) | HC_CFG_MAN_CS_EN, + priv->regs + HC_CFG); + writel(HC_EN_BIT, priv->regs + HC_EN); + writel(readl(priv->regs + HC_CFG) | HC_CFG_MAN_CS_ASSERT, + priv->regs + HC_CFG); + + return 0; +} + +static int mxic_spi_release_bus(struct udevice *dev) +{ + struct udevice *bus = dev_get_parent(dev); + struct mxic_spi_priv *priv = dev_get_priv(bus); + + writel(readl(priv->regs + HC_CFG) & ~HC_CFG_MAN_CS_ASSERT, + priv->regs + HC_CFG); + writel(0, priv->regs + HC_EN); + + return 0; +} + +static int mxic_spi_xfer(struct udevice *dev, unsigned int bitlen, + const void *dout, void *din, unsigned long flags) +{ + struct udevice *bus = dev_get_parent(dev); + struct mxic_spi_priv *priv = dev_get_priv(bus); + struct spi_slave *slave = dev_get_parent_priv(dev); + unsigned int busw = OP_BUSW_1; + unsigned int len = bitlen / 8; + int ret; + + if (dout && din) { + if (((slave->mode & SPI_TX_QUAD) && + !(slave->mode & SPI_RX_QUAD)) || + ((slave->mode & SPI_TX_DUAL) && + !(slave->mode & SPI_RX_DUAL))) + return -ENOTSUPP; + } + + if (din) { + if (slave->mode & SPI_TX_QUAD) + busw = OP_BUSW_4; + else if (slave->mode & SPI_TX_DUAL) + busw = OP_BUSW_2; + } else if (dout) { + if (slave->mode & SPI_RX_QUAD) + busw = OP_BUSW_4; + else if (slave->mode & SPI_RX_DUAL) + busw = OP_BUSW_2; + } + + writel(OP_CMD_BYTES(1) | OP_CMD_BUSW(busw) | + OP_DATA_BUSW(busw) | (din ? OP_READ : 0), + priv->regs + SS_CTRL(0)); + + ret = mxic_spi_data_xfer(priv, dout, din, len); + if (ret) + return ret; + + return 0; +} + +static int mxic_spi_probe(struct udevice *bus) +{ + struct mxic_spi_priv *priv = dev_get_priv(bus); + + priv->regs = (void *)dev_read_addr(bus); + + priv->send_clk = devm_clk_get(bus, "send_clk"); + if (IS_ERR(priv->send_clk)) + return PTR_ERR(priv->send_clk); + + priv->send_dly_clk = devm_clk_get(bus, "send_dly_clk"); + if (IS_ERR(priv->send_dly_clk)) + return PTR_ERR(priv->send_dly_clk); + + mxic_spi_hw_init(priv); + + return 0; +} + +static const struct dm_spi_ops mxic_spi_ops = { + .claim_bus = mxic_spi_claim_bus, + .release_bus = mxic_spi_release_bus, + .xfer = mxic_spi_xfer, + .set_speed = mxic_spi_set_speed, + .set_mode = mxic_spi_set_mode, + .mem_ops = &mxic_spi_mem_ops, +}; + +static const struct udevice_id mxic_spi_ids[] = { + { .compatible = "mxicy,mx25f0a-spi", }, + { } +}; + +U_BOOT_DRIVER(mxic_spi) = { + .name = "mxic_spi", + .id = UCLASS_SPI, + .of_match = mxic_spi_ids, + .ops = &mxic_spi_ops, + .priv_auto = sizeof(struct mxic_spi_priv), + .probe = mxic_spi_probe, +};