[u-boot.git] / drivers / mmc / jz_mmc.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Ingenic JZ MMC driver
 *
 * Copyright (c) 2013 Imagination Technologies
 * Author: Paul Burton <[email protected]>
 */

#include <common.h>
#include <malloc.h>
#include <mmc.h>
#include <asm/io.h>
#include <asm/unaligned.h>
#include <errno.h>
#include <mach/jz4780.h>
#include <wait_bit.h>

/* Registers */
#define MSC_STRPCL			0x000
#define MSC_STAT			0x004
#define MSC_CLKRT			0x008
#define MSC_CMDAT			0x00c
#define MSC_RESTO			0x010
#define MSC_RDTO			0x014
#define MSC_BLKLEN			0x018
#define MSC_NOB				0x01c
#define MSC_SNOB			0x020
#define MSC_IMASK			0x024
#define MSC_IREG			0x028
#define MSC_CMD				0x02c
#define MSC_ARG				0x030
#define MSC_RES				0x034
#define MSC_RXFIFO			0x038
#define MSC_TXFIFO			0x03c
#define MSC_LPM				0x040
#define MSC_DMAC			0x044
#define MSC_DMANDA			0x048
#define MSC_DMADA			0x04c
#define MSC_DMALEN			0x050
#define MSC_DMACMD			0x054
#define MSC_CTRL2			0x058
#define MSC_RTCNT			0x05c
#define MSC_DBG				0x0fc

/* MSC Clock and Control Register (MSC_STRPCL) */
#define MSC_STRPCL_EXIT_MULTIPLE	BIT(7)
#define MSC_STRPCL_EXIT_TRANSFER	BIT(6)
#define MSC_STRPCL_START_READWAIT	BIT(5)
#define MSC_STRPCL_STOP_READWAIT	BIT(4)
#define MSC_STRPCL_RESET		BIT(3)
#define MSC_STRPCL_START_OP		BIT(2)
#define MSC_STRPCL_CLOCK_CONTROL_STOP	BIT(0)
#define MSC_STRPCL_CLOCK_CONTROL_START	BIT(1)

/* MSC Status Register (MSC_STAT) */
#define MSC_STAT_AUTO_CMD_DONE		BIT(31)
#define MSC_STAT_IS_RESETTING		BIT(15)
#define MSC_STAT_SDIO_INT_ACTIVE	BIT(14)
#define MSC_STAT_PRG_DONE		BIT(13)
#define MSC_STAT_DATA_TRAN_DONE		BIT(12)
#define MSC_STAT_END_CMD_RES		BIT(11)
#define MSC_STAT_DATA_FIFO_AFULL	BIT(10)
#define MSC_STAT_IS_READWAIT		BIT(9)
#define MSC_STAT_CLK_EN			BIT(8)
#define MSC_STAT_DATA_FIFO_FULL		BIT(7)
#define MSC_STAT_DATA_FIFO_EMPTY	BIT(6)
#define MSC_STAT_CRC_RES_ERR		BIT(5)
#define MSC_STAT_CRC_READ_ERROR		BIT(4)
#define MSC_STAT_CRC_WRITE_ERROR	BIT(2)
#define MSC_STAT_CRC_WRITE_ERROR_NOSTS	BIT(4)
#define MSC_STAT_TIME_OUT_RES		BIT(1)
#define MSC_STAT_TIME_OUT_READ		BIT(0)

/* MSC Bus Clock Control Register (MSC_CLKRT) */
#define MSC_CLKRT_CLK_RATE_MASK		0x7

/* MSC Command Sequence Control Register (MSC_CMDAT) */
#define MSC_CMDAT_IO_ABORT		BIT(11)
#define MSC_CMDAT_BUS_WIDTH_1BIT	(0x0 << 9)
#define MSC_CMDAT_BUS_WIDTH_4BIT	(0x2 << 9)
#define MSC_CMDAT_DMA_EN		BIT(8)
#define MSC_CMDAT_INIT			BIT(7)
#define MSC_CMDAT_BUSY			BIT(6)
#define MSC_CMDAT_STREAM_BLOCK		BIT(5)
#define MSC_CMDAT_WRITE			BIT(4)
#define MSC_CMDAT_DATA_EN		BIT(3)
#define MSC_CMDAT_RESPONSE_MASK		(0x7 << 0)
#define MSC_CMDAT_RESPONSE_NONE		(0x0 << 0) /* No response */
#define MSC_CMDAT_RESPONSE_R1		(0x1 << 0) /* Format R1 and R1b */
#define MSC_CMDAT_RESPONSE_R2		(0x2 << 0) /* Format R2 */
#define MSC_CMDAT_RESPONSE_R3		(0x3 << 0) /* Format R3 */
#define MSC_CMDAT_RESPONSE_R4		(0x4 << 0) /* Format R4 */
#define MSC_CMDAT_RESPONSE_R5		(0x5 << 0) /* Format R5 */
#define MSC_CMDAT_RESPONSE_R6		(0x6 << 0) /* Format R6 */

/* MSC Interrupts Mask Register (MSC_IMASK) */
#define MSC_IMASK_TIME_OUT_RES		BIT(9)
#define MSC_IMASK_TIME_OUT_READ		BIT(8)
#define MSC_IMASK_SDIO			BIT(7)
#define MSC_IMASK_TXFIFO_WR_REQ		BIT(6)
#define MSC_IMASK_RXFIFO_RD_REQ		BIT(5)
#define MSC_IMASK_END_CMD_RES		BIT(2)
#define MSC_IMASK_PRG_DONE		BIT(1)
#define MSC_IMASK_DATA_TRAN_DONE	BIT(0)

/* MSC Interrupts Status Register (MSC_IREG) */
#define MSC_IREG_TIME_OUT_RES		BIT(9)
#define MSC_IREG_TIME_OUT_READ		BIT(8)
#define MSC_IREG_SDIO			BIT(7)
#define MSC_IREG_TXFIFO_WR_REQ		BIT(6)
#define MSC_IREG_RXFIFO_RD_REQ		BIT(5)
#define MSC_IREG_END_CMD_RES		BIT(2)
#define MSC_IREG_PRG_DONE		BIT(1)
#define MSC_IREG_DATA_TRAN_DONE		BIT(0)

struct jz_mmc_plat {
	struct mmc_config cfg;
	struct mmc mmc;
};

struct jz_mmc_priv {
	void __iomem		*regs;
	u32			flags;
/* priv flags */
#define JZ_MMC_BUS_WIDTH_MASK	0x3
#define JZ_MMC_BUS_WIDTH_1	0x0
#define JZ_MMC_BUS_WIDTH_4	0x2
#define JZ_MMC_BUS_WIDTH_8	0x3
#define JZ_MMC_SENT_INIT	BIT(2)
};

static int jz_mmc_clock_rate(void)
{
	return 24000000;
}

#if CONFIG_IS_ENABLED(MMC_WRITE)
static inline void jz_mmc_write_data(struct jz_mmc_priv *priv, struct mmc_data *data)
{
	int sz = DIV_ROUND_UP(data->blocks * data->blocksize, 4);
	const void *buf = data->src;

	while (sz--) {
		u32 val = get_unaligned_le32(buf);

		wait_for_bit_le32(priv->regs + MSC_IREG,
				  MSC_IREG_TXFIFO_WR_REQ,
				  true, 10000, false);
		writel(val, priv->regs + MSC_TXFIFO);
		buf += 4;
	}
}
#else
static void jz_mmc_write_data(struct jz_mmc_priv *priv, struct mmc_data *data)
{}
#endif

static inline int jz_mmc_read_data(struct jz_mmc_priv *priv, struct mmc_data *data)
{
	int sz = data->blocks * data->blocksize;
	void *buf = data->dest;
	u32 stat, val;

	do {
		stat = readl(priv->regs + MSC_STAT);

		if (stat & MSC_STAT_TIME_OUT_READ)
			return -ETIMEDOUT;
		if (stat & MSC_STAT_CRC_READ_ERROR)
			return -EINVAL;
		if (stat & MSC_STAT_DATA_FIFO_EMPTY) {
			udelay(10);
			continue;
		}
		do {
			val = readl(priv->regs + MSC_RXFIFO);
			if (sz == 1)
				*(u8 *)buf = (u8)val;
			else if (sz == 2)
				put_unaligned_le16(val, buf);
			else if (sz >= 4)
				put_unaligned_le32(val, buf);
			buf += 4;
			sz -= 4;
			stat = readl(priv->regs + MSC_STAT);
		} while (!(stat & MSC_STAT_DATA_FIFO_EMPTY));
	} while (!(stat & MSC_STAT_DATA_TRAN_DONE));
	return 0;
}

static int jz_mmc_send_cmd(struct mmc *mmc, struct jz_mmc_priv *priv,
			   struct mmc_cmd *cmd, struct mmc_data *data)
{
	u32 stat, mask, cmdat = 0;
	int i, ret;

	/* stop the clock */
	writel(MSC_STRPCL_CLOCK_CONTROL_STOP, priv->regs + MSC_STRPCL);
	ret = wait_for_bit_le32(priv->regs + MSC_STAT,
				MSC_STAT_CLK_EN, false, 10000, false);
	if (ret)
		return ret;

	writel(0, priv->regs + MSC_DMAC);

	/* setup command */
	writel(cmd->cmdidx, priv->regs + MSC_CMD);
	writel(cmd->cmdarg, priv->regs + MSC_ARG);

	if (data) {
		/* setup data */
		cmdat |= MSC_CMDAT_DATA_EN;
		if (data->flags & MMC_DATA_WRITE)
			cmdat |= MSC_CMDAT_WRITE;

		writel(data->blocks, priv->regs + MSC_NOB);
		writel(data->blocksize, priv->regs + MSC_BLKLEN);
	} else {
		writel(0, priv->regs + MSC_NOB);
		writel(0, priv->regs + MSC_BLKLEN);
	}

	/* setup response */
	switch (cmd->resp_type) {
	case MMC_RSP_NONE:
		break;
	case MMC_RSP_R1:
	case MMC_RSP_R1b:
		cmdat |= MSC_CMDAT_RESPONSE_R1;
		break;
	case MMC_RSP_R2:
		cmdat |= MSC_CMDAT_RESPONSE_R2;
		break;
	case MMC_RSP_R3:
		cmdat |= MSC_CMDAT_RESPONSE_R3;
		break;
	default:
		break;
	}

	if (cmd->resp_type & MMC_RSP_BUSY)
		cmdat |= MSC_CMDAT_BUSY;

	/* set init for the first command only */
	if (!(priv->flags & JZ_MMC_SENT_INIT)) {
		cmdat |= MSC_CMDAT_INIT;
		priv->flags |= JZ_MMC_SENT_INIT;
	}

	cmdat |= (priv->flags & JZ_MMC_BUS_WIDTH_MASK) << 9;

	/* write the data setup */
	writel(cmdat, priv->regs + MSC_CMDAT);

	/* unmask interrupts */
	mask = 0xffffffff & ~(MSC_IMASK_END_CMD_RES | MSC_IMASK_TIME_OUT_RES);
	if (data) {
		mask &= ~MSC_IMASK_DATA_TRAN_DONE;
		if (data->flags & MMC_DATA_WRITE) {
			mask &= ~MSC_IMASK_TXFIFO_WR_REQ;
		} else {
			mask &= ~(MSC_IMASK_RXFIFO_RD_REQ |
				  MSC_IMASK_TIME_OUT_READ);
		}
	}
	writel(mask, priv->regs + MSC_IMASK);

	/* clear interrupts */
	writel(0xffffffff, priv->regs + MSC_IREG);

	/* start the command (& the clock) */
	writel(MSC_STRPCL_START_OP | MSC_STRPCL_CLOCK_CONTROL_START,
	       priv->regs + MSC_STRPCL);

	/* wait for completion */
	for (i = 0; i < 100; i++) {
		stat = readl(priv->regs + MSC_IREG);
		stat &= MSC_IREG_END_CMD_RES | MSC_IREG_TIME_OUT_RES;
		if (stat)
			break;
		mdelay(1);
	}
	writel(stat, priv->regs + MSC_IREG);
	if (stat & MSC_IREG_TIME_OUT_RES)
		return -ETIMEDOUT;

	if (cmd->resp_type & MMC_RSP_PRESENT) {
		/* read the response */
		if (cmd->resp_type & MMC_RSP_136) {
			u16 a, b, c, i;

			a = readw(priv->regs + MSC_RES);
			for (i = 0; i < 4; i++) {
				b = readw(priv->regs + MSC_RES);
				c = readw(priv->regs + MSC_RES);
				cmd->response[i] =
					(a << 24) | (b << 8) | (c >> 8);
				a = c;
			}
		} else {
			cmd->response[0] = readw(priv->regs + MSC_RES) << 24;
			cmd->response[0] |= readw(priv->regs + MSC_RES) << 8;
			cmd->response[0] |= readw(priv->regs + MSC_RES) & 0xff;
		}
	}
	if (data) {
		if (data->flags & MMC_DATA_WRITE)
			jz_mmc_write_data(priv, data);
		else if (data->flags & MMC_DATA_READ) {
			ret = jz_mmc_read_data(priv, data);
			if (ret)
				return ret;
		}
	}

	return 0;
}

static int jz_mmc_set_ios(struct mmc *mmc, struct jz_mmc_priv *priv)
{
	u32 real_rate = jz_mmc_clock_rate();
	u8 clk_div = 0;

	/* calculate clock divide */
	while ((real_rate > mmc->clock) && (clk_div < 7)) {
		real_rate >>= 1;
		clk_div++;
	}
	writel(clk_div & MSC_CLKRT_CLK_RATE_MASK, priv->regs + MSC_CLKRT);

	/* set the bus width for the next command */
	priv->flags &= ~JZ_MMC_BUS_WIDTH_MASK;
	if (mmc->bus_width == 8)
		priv->flags |= JZ_MMC_BUS_WIDTH_8;
	else if (mmc->bus_width == 4)
		priv->flags |= JZ_MMC_BUS_WIDTH_4;
	else
		priv->flags |= JZ_MMC_BUS_WIDTH_1;

	return 0;
}

static int jz_mmc_core_init(struct mmc *mmc)
{
	struct jz_mmc_priv *priv = mmc->priv;
	int ret;

	/* Reset */
	writel(MSC_STRPCL_RESET, priv->regs + MSC_STRPCL);
	ret = wait_for_bit_le32(priv->regs + MSC_STAT,
				MSC_STAT_IS_RESETTING, false, 10000, false);
	if (ret)
		return ret;

	/* Maximum timeouts */
	writel(0xffff, priv->regs + MSC_RESTO);
	writel(0xffffffff, priv->regs + MSC_RDTO);

	/* Enable low power mode */
	writel(0x1, priv->regs + MSC_LPM);

	return 0;
}

#if !CONFIG_IS_ENABLED(DM_MMC)

static int jz_mmc_legacy_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
				  struct mmc_data *data)
{
	struct jz_mmc_priv *priv = mmc->priv;

	return jz_mmc_send_cmd(mmc, priv, cmd, data);
}

static int jz_mmc_legacy_set_ios(struct mmc *mmc)
{
	struct jz_mmc_priv *priv = mmc->priv;

	return jz_mmc_set_ios(mmc, priv);
};

static const struct mmc_ops jz_msc_ops = {
	.send_cmd	= jz_mmc_legacy_send_cmd,
	.set_ios	= jz_mmc_legacy_set_ios,
	.init		= jz_mmc_core_init,
};

static struct jz_mmc_priv jz_mmc_priv_static;
static struct jz_mmc_plat jz_mmc_plat_static = {
	.cfg = {
		.name = "MSC",
		.ops = &jz_msc_ops,

		.voltages = MMC_VDD_27_28 | MMC_VDD_28_29 | MMC_VDD_29_30 |
			    MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33 |
			    MMC_VDD_33_34 | MMC_VDD_34_35 | MMC_VDD_35_36,
		.host_caps = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS,

		.f_min = 375000,
		.f_max = 48000000,
		.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
	},
};

int jz_mmc_init(void __iomem *base)
{
	struct mmc *mmc;

	jz_mmc_priv_static.regs = base;

	mmc = mmc_create(&jz_mmc_plat_static.cfg, &jz_mmc_priv_static);

	return mmc ? 0 : -ENODEV;
}

#else /* CONFIG_DM_MMC */

#include <dm.h>
DECLARE_GLOBAL_DATA_PTR;

static int jz_mmc_dm_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
			      struct mmc_data *data)
{
	struct jz_mmc_priv *priv = dev_get_priv(dev);
	struct mmc *mmc = mmc_get_mmc_dev(dev);

	return jz_mmc_send_cmd(mmc, priv, cmd, data);
}

static int jz_mmc_dm_set_ios(struct udevice *dev)
{
	struct jz_mmc_priv *priv = dev_get_priv(dev);
	struct mmc *mmc = mmc_get_mmc_dev(dev);

	return jz_mmc_set_ios(mmc, priv);
};

static const struct dm_mmc_ops jz_msc_ops = {
	.send_cmd	= jz_mmc_dm_send_cmd,
	.set_ios	= jz_mmc_dm_set_ios,
};

static int jz_mmc_ofdata_to_platdata(struct udevice *dev)
{
	struct jz_mmc_priv *priv = dev_get_priv(dev);
	struct jz_mmc_plat *plat = dev_get_platdata(dev);
	struct mmc_config *cfg;
	int ret;

	priv->regs = map_physmem(devfdt_get_addr(dev), 0x100, MAP_NOCACHE);
	cfg = &plat->cfg;

	cfg->name = "MSC";
	cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS;

	ret = mmc_of_parse(dev, cfg);
	if (ret < 0) {
		dev_err(dev, "failed to parse host caps\n");
		return ret;
	}

	cfg->f_min = 400000;
	cfg->f_max = 52000000;

	cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
	cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;

	return 0;
}

static int jz_mmc_bind(struct udevice *dev)
{
	struct jz_mmc_plat *plat = dev_get_platdata(dev);

	return mmc_bind(dev, &plat->mmc, &plat->cfg);
}

static int jz_mmc_probe(struct udevice *dev)
{
	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
	struct jz_mmc_priv *priv = dev_get_priv(dev);
	struct jz_mmc_plat *plat = dev_get_platdata(dev);

	plat->mmc.priv = priv;
	upriv->mmc = &plat->mmc;
	return jz_mmc_core_init(&plat->mmc);
}

static const struct udevice_id jz_mmc_ids[] = {
	{ .compatible = "ingenic,jz4780-mmc" },
	{ }
};

U_BOOT_DRIVER(jz_mmc_drv) = {
	.name			= "jz_mmc",
	.id			= UCLASS_MMC,
	.of_match		= jz_mmc_ids,
	.ofdata_to_platdata	= jz_mmc_ofdata_to_platdata,
	.bind			= jz_mmc_bind,
	.probe			= jz_mmc_probe,
	.priv_auto_alloc_size	= sizeof(struct jz_mmc_priv),
	.platdata_auto_alloc_size = sizeof(struct jz_mmc_plat),
	.ops			= &jz_msc_ops,
};
#endif /* CONFIG_DM_MMC */
Commit	Line	Data
d7727139 PB	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Ingenic JZ MMC driver
	4	*
	5	* Copyright (c) 2013 Imagination Technologies
	6	* Author: Paul Burton <[email protected]>
	7	*/
	8
	9	#include <common.h>
	10	#include <malloc.h>
	11	#include <mmc.h>
	12	#include <asm/io.h>
	13	#include <asm/unaligned.h>
	14	#include <errno.h>
	15	#include <mach/jz4780.h>
	16	#include <wait_bit.h>
	17
	18	/* Registers */
	19	#define MSC_STRPCL 0x000
	20	#define MSC_STAT 0x004
	21	#define MSC_CLKRT 0x008
	22	#define MSC_CMDAT 0x00c
	23	#define MSC_RESTO 0x010
	24	#define MSC_RDTO 0x014
	25	#define MSC_BLKLEN 0x018
	26	#define MSC_NOB 0x01c
	27	#define MSC_SNOB 0x020
	28	#define MSC_IMASK 0x024
	29	#define MSC_IREG 0x028
	30	#define MSC_CMD 0x02c
	31	#define MSC_ARG 0x030
	32	#define MSC_RES 0x034
	33	#define MSC_RXFIFO 0x038
	34	#define MSC_TXFIFO 0x03c
	35	#define MSC_LPM 0x040
	36	#define MSC_DMAC 0x044
	37	#define MSC_DMANDA 0x048
	38	#define MSC_DMADA 0x04c
	39	#define MSC_DMALEN 0x050
	40	#define MSC_DMACMD 0x054
	41	#define MSC_CTRL2 0x058
	42	#define MSC_RTCNT 0x05c
	43	#define MSC_DBG 0x0fc
	44
	45	/* MSC Clock and Control Register (MSC_STRPCL) */
	46	#define MSC_STRPCL_EXIT_MULTIPLE BIT(7)
	47	#define MSC_STRPCL_EXIT_TRANSFER BIT(6)
	48	#define MSC_STRPCL_START_READWAIT BIT(5)
	49	#define MSC_STRPCL_STOP_READWAIT BIT(4)
	50	#define MSC_STRPCL_RESET BIT(3)
	51	#define MSC_STRPCL_START_OP BIT(2)
	52	#define MSC_STRPCL_CLOCK_CONTROL_STOP BIT(0)
	53	#define MSC_STRPCL_CLOCK_CONTROL_START BIT(1)
	54
	55	/* MSC Status Register (MSC_STAT) */
	56	#define MSC_STAT_AUTO_CMD_DONE BIT(31)
	57	#define MSC_STAT_IS_RESETTING BIT(15)
	58	#define MSC_STAT_SDIO_INT_ACTIVE BIT(14)
	59	#define MSC_STAT_PRG_DONE BIT(13)
	60	#define MSC_STAT_DATA_TRAN_DONE BIT(12)
	61	#define MSC_STAT_END_CMD_RES BIT(11)
	62	#define MSC_STAT_DATA_FIFO_AFULL BIT(10)
	63	#define MSC_STAT_IS_READWAIT BIT(9)
	64	#define MSC_STAT_CLK_EN BIT(8)
65	#define MSC_STAT_DATA_FIFO_FULL BIT(7)
66	#define MSC_STAT_DATA_FIFO_EMPTY BIT(6)
67	#define MSC_STAT_CRC_RES_ERR BIT(5)
68	#define MSC_STAT_CRC_READ_ERROR BIT(4)
69	#define MSC_STAT_CRC_WRITE_ERROR BIT(2)
70	#define MSC_STAT_CRC_WRITE_ERROR_NOSTS BIT(4)
71	#define MSC_STAT_TIME_OUT_RES BIT(1)
72	#define MSC_STAT_TIME_OUT_READ BIT(0)
73
74	/* MSC Bus Clock Control Register (MSC_CLKRT) */
75	#define MSC_CLKRT_CLK_RATE_MASK 0x7
76
77	/* MSC Command Sequence Control Register (MSC_CMDAT) */
78	#define MSC_CMDAT_IO_ABORT BIT(11)
79	#define MSC_CMDAT_BUS_WIDTH_1BIT (0x0 << 9)
80	#define MSC_CMDAT_BUS_WIDTH_4BIT (0x2 << 9)
81	#define MSC_CMDAT_DMA_EN BIT(8)
82	#define MSC_CMDAT_INIT BIT(7)
83	#define MSC_CMDAT_BUSY BIT(6)
84	#define MSC_CMDAT_STREAM_BLOCK BIT(5)
85	#define MSC_CMDAT_WRITE BIT(4)
86	#define MSC_CMDAT_DATA_EN BIT(3)
87	#define MSC_CMDAT_RESPONSE_MASK (0x7 << 0)
88	#define MSC_CMDAT_RESPONSE_NONE (0x0 << 0) /* No response */
89	#define MSC_CMDAT_RESPONSE_R1 (0x1 << 0) /* Format R1 and R1b */
90	#define MSC_CMDAT_RESPONSE_R2 (0x2 << 0) /* Format R2 */
91	#define MSC_CMDAT_RESPONSE_R3 (0x3 << 0) /* Format R3 */
92	#define MSC_CMDAT_RESPONSE_R4 (0x4 << 0) /* Format R4 */
93	#define MSC_CMDAT_RESPONSE_R5 (0x5 << 0) /* Format R5 */
94	#define MSC_CMDAT_RESPONSE_R6 (0x6 << 0) /* Format R6 */
95
96	/* MSC Interrupts Mask Register (MSC_IMASK) */
97	#define MSC_IMASK_TIME_OUT_RES BIT(9)
98	#define MSC_IMASK_TIME_OUT_READ BIT(8)
99	#define MSC_IMASK_SDIO BIT(7)
100	#define MSC_IMASK_TXFIFO_WR_REQ BIT(6)
101	#define MSC_IMASK_RXFIFO_RD_REQ BIT(5)
102	#define MSC_IMASK_END_CMD_RES BIT(2)
103	#define MSC_IMASK_PRG_DONE BIT(1)
104	#define MSC_IMASK_DATA_TRAN_DONE BIT(0)
105
106	/* MSC Interrupts Status Register (MSC_IREG) */
107	#define MSC_IREG_TIME_OUT_RES BIT(9)
108	#define MSC_IREG_TIME_OUT_READ BIT(8)
109	#define MSC_IREG_SDIO BIT(7)
110	#define MSC_IREG_TXFIFO_WR_REQ BIT(6)
111	#define MSC_IREG_RXFIFO_RD_REQ BIT(5)
112	#define MSC_IREG_END_CMD_RES BIT(2)
113	#define MSC_IREG_PRG_DONE BIT(1)
114	#define MSC_IREG_DATA_TRAN_DONE BIT(0)
115
116	struct jz_mmc_plat {
117	struct mmc_config cfg;
118	struct mmc mmc;
119	};
120
121	struct jz_mmc_priv {
122	void __iomem *regs;
123	u32 flags;
124	/* priv flags */
125	#define JZ_MMC_BUS_WIDTH_MASK 0x3
126	#define JZ_MMC_BUS_WIDTH_1 0x0
127	#define JZ_MMC_BUS_WIDTH_4 0x2
128	#define JZ_MMC_BUS_WIDTH_8 0x3
129	#define JZ_MMC_SENT_INIT BIT(2)
130	};
131
132	static int jz_mmc_clock_rate(void)
133	{
134	return 24000000;
135	}
136
82d54647 EG	137	#if CONFIG_IS_ENABLED(MMC_WRITE)
	138	static inline void jz_mmc_write_data(struct jz_mmc_priv priv, struct mmc_data data)
	139	{
	140	int sz = DIV_ROUND_UP(data->blocks * data->blocksize, 4);
	141	const void *buf = data->src;
	142
	143	while (sz--) {
	144	u32 val = get_unaligned_le32(buf);
	145
	146	wait_for_bit_le32(priv->regs + MSC_IREG,
	147	MSC_IREG_TXFIFO_WR_REQ,
	148	true, 10000, false);
	149	writel(val, priv->regs + MSC_TXFIFO);
	150	buf += 4;
	151	}
	152	}
	153	#else
	154	static void jz_mmc_write_data(struct jz_mmc_priv priv, struct mmc_data data)
	155	{}
	156	#endif
	157
	158	static inline int jz_mmc_read_data(struct jz_mmc_priv priv, struct mmc_data data)
	159	{
	160	int sz = data->blocks * data->blocksize;
	161	void *buf = data->dest;
	162	u32 stat, val;
	163
	164	do {
	165	stat = readl(priv->regs + MSC_STAT);
	166
	167	if (stat & MSC_STAT_TIME_OUT_READ)
	168	return -ETIMEDOUT;
	169	if (stat & MSC_STAT_CRC_READ_ERROR)
	170	return -EINVAL;
	171	if (stat & MSC_STAT_DATA_FIFO_EMPTY) {
	172	udelay(10);
	173	continue;
	174	}
	175	do {
	176	val = readl(priv->regs + MSC_RXFIFO);
	177	if (sz == 1)
	178	(u8 )buf = (u8)val;
	179	else if (sz == 2)
	180	put_unaligned_le16(val, buf);
	181	else if (sz >= 4)
	182	put_unaligned_le32(val, buf);
	183	buf += 4;
	184	sz -= 4;
	185	stat = readl(priv->regs + MSC_STAT);
	186	} while (!(stat & MSC_STAT_DATA_FIFO_EMPTY));
	187	} while (!(stat & MSC_STAT_DATA_TRAN_DONE));
	188	return 0;
	189	}
	190
d7727139 PB	191	static int jz_mmc_send_cmd(struct mmc mmc, struct jz_mmc_priv priv,
	192	struct mmc_cmd cmd, struct mmc_data data)
	193	{
	194	u32 stat, mask, cmdat = 0;
	195	int i, ret;
	196
	197	/* stop the clock */
	198	writel(MSC_STRPCL_CLOCK_CONTROL_STOP, priv->regs + MSC_STRPCL);
	199	ret = wait_for_bit_le32(priv->regs + MSC_STAT,
	200	MSC_STAT_CLK_EN, false, 10000, false);
	201	if (ret)
	202	return ret;
	203
	204	writel(0, priv->regs + MSC_DMAC);
	205
	206	/* setup command */
	207	writel(cmd->cmdidx, priv->regs + MSC_CMD);
	208	writel(cmd->cmdarg, priv->regs + MSC_ARG);
	209
	210	if (data) {
	211	/* setup data */
	212	cmdat \|= MSC_CMDAT_DATA_EN;
	213	if (data->flags & MMC_DATA_WRITE)
	214	cmdat \|= MSC_CMDAT_WRITE;
	215
	216	writel(data->blocks, priv->regs + MSC_NOB);
	217	writel(data->blocksize, priv->regs + MSC_BLKLEN);
	218	} else {
	219	writel(0, priv->regs + MSC_NOB);
	220	writel(0, priv->regs + MSC_BLKLEN);
	221	}
	222
	223	/* setup response */
	224	switch (cmd->resp_type) {
	225	case MMC_RSP_NONE:
	226	break;
	227	case MMC_RSP_R1:
	228	case MMC_RSP_R1b:
	229	cmdat \|= MSC_CMDAT_RESPONSE_R1;
	230	break;
	231	case MMC_RSP_R2:
	232	cmdat \|= MSC_CMDAT_RESPONSE_R2;
	233	break;
	234	case MMC_RSP_R3:
	235	cmdat \|= MSC_CMDAT_RESPONSE_R3;
	236	break;
	237	default:
	238	break;
	239	}
	240
	241	if (cmd->resp_type & MMC_RSP_BUSY)
	242	cmdat \|= MSC_CMDAT_BUSY;
	243
	244	/* set init for the first command only */
	245	if (!(priv->flags & JZ_MMC_SENT_INIT)) {
	246	cmdat \|= MSC_CMDAT_INIT;
	247	priv->flags \|= JZ_MMC_SENT_INIT;
	248	}
	249
	250	cmdat \|= (priv->flags & JZ_MMC_BUS_WIDTH_MASK) << 9;
	251
	252	/* write the data setup */
	253	writel(cmdat, priv->regs + MSC_CMDAT);
	254
255	/* unmask interrupts */
256	mask = 0xffffffff & ~(MSC_IMASK_END_CMD_RES \| MSC_IMASK_TIME_OUT_RES);
257	if (data) {
258	mask &= ~MSC_IMASK_DATA_TRAN_DONE;
259	if (data->flags & MMC_DATA_WRITE) {
260	mask &= ~MSC_IMASK_TXFIFO_WR_REQ;
261	} else {
262	mask &= ~(MSC_IMASK_RXFIFO_RD_REQ \|
263	MSC_IMASK_TIME_OUT_READ);
264	}
265	}
266	writel(mask, priv->regs + MSC_IMASK);
267
268	/* clear interrupts */
269	writel(0xffffffff, priv->regs + MSC_IREG);
270
271	/* start the command (& the clock) */
272	writel(MSC_STRPCL_START_OP \| MSC_STRPCL_CLOCK_CONTROL_START,
273	priv->regs + MSC_STRPCL);
274
275	/* wait for completion */
276	for (i = 0; i < 100; i++) {
277	stat = readl(priv->regs + MSC_IREG);
278	stat &= MSC_IREG_END_CMD_RES \| MSC_IREG_TIME_OUT_RES;
279	if (stat)
280	break;
281	mdelay(1);
282	}
283	writel(stat, priv->regs + MSC_IREG);
284	if (stat & MSC_IREG_TIME_OUT_RES)
285	return -ETIMEDOUT;
286
287	if (cmd->resp_type & MMC_RSP_PRESENT) {
288	/* read the response */
289	if (cmd->resp_type & MMC_RSP_136) {
290	u16 a, b, c, i;
291
292	a = readw(priv->regs + MSC_RES);
293	for (i = 0; i < 4; i++) {
294	b = readw(priv->regs + MSC_RES);
295	c = readw(priv->regs + MSC_RES);
296	cmd->response[i] =
297	(a << 24) \| (b << 8) \| (c >> 8);
298	a = c;
299	}
300	} else {
301	cmd->response[0] = readw(priv->regs + MSC_RES) << 24;
302	cmd->response[0] \|= readw(priv->regs + MSC_RES) << 8;
303	cmd->response[0] \|= readw(priv->regs + MSC_RES) & 0xff;
304	}
305	}
82d54647 EG	306	if (data) {
	307	if (data->flags & MMC_DATA_WRITE)
	308	jz_mmc_write_data(priv, data);
	309	else if (data->flags & MMC_DATA_READ) {
	310	ret = jz_mmc_read_data(priv, data);
	311	if (ret)
	312	return ret;
d7727139	313	}
d7727139 PB	314	}
	315
	316	return 0;
	317	}
	318
	319	static int jz_mmc_set_ios(struct mmc mmc, struct jz_mmc_priv priv)
	320	{
	321	u32 real_rate = jz_mmc_clock_rate();
	322	u8 clk_div = 0;
	323
	324	/* calculate clock divide */
	325	while ((real_rate > mmc->clock) && (clk_div < 7)) {
	326	real_rate >>= 1;
	327	clk_div++;
	328	}
	329	writel(clk_div & MSC_CLKRT_CLK_RATE_MASK, priv->regs + MSC_CLKRT);
	330
	331	/* set the bus width for the next command */
	332	priv->flags &= ~JZ_MMC_BUS_WIDTH_MASK;
	333	if (mmc->bus_width == 8)
	334	priv->flags \|= JZ_MMC_BUS_WIDTH_8;
	335	else if (mmc->bus_width == 4)
	336	priv->flags \|= JZ_MMC_BUS_WIDTH_4;
	337	else
	338	priv->flags \|= JZ_MMC_BUS_WIDTH_1;
	339
	340	return 0;
	341	}
	342
	343	static int jz_mmc_core_init(struct mmc *mmc)
	344	{
	345	struct jz_mmc_priv *priv = mmc->priv;
	346	int ret;
	347
	348	/* Reset */
	349	writel(MSC_STRPCL_RESET, priv->regs + MSC_STRPCL);
	350	ret = wait_for_bit_le32(priv->regs + MSC_STAT,
	351	MSC_STAT_IS_RESETTING, false, 10000, false);
	352	if (ret)
	353	return ret;
	354
	355	/* Maximum timeouts */
	356	writel(0xffff, priv->regs + MSC_RESTO);
	357	writel(0xffffffff, priv->regs + MSC_RDTO);
	358
	359	/* Enable low power mode */
	360	writel(0x1, priv->regs + MSC_LPM);
	361
	362	return 0;
	363	}
	364
	365	#if !CONFIG_IS_ENABLED(DM_MMC)
	366
	367	static int jz_mmc_legacy_send_cmd(struct mmc mmc, struct mmc_cmd cmd,
	368	struct mmc_data *data)
	369	{
	370	struct jz_mmc_priv *priv = mmc->priv;
	371
	372	return jz_mmc_send_cmd(mmc, priv, cmd, data);
	373	}
	374
	375	static int jz_mmc_legacy_set_ios(struct mmc *mmc)
	376	{
	377	struct jz_mmc_priv *priv = mmc->priv;
378
379	return jz_mmc_set_ios(mmc, priv);
380	};
381
382	static const struct mmc_ops jz_msc_ops = {
383	.send_cmd = jz_mmc_legacy_send_cmd,
384	.set_ios = jz_mmc_legacy_set_ios,
385	.init = jz_mmc_core_init,
386	};
387
388	static struct jz_mmc_priv jz_mmc_priv_static;
389	static struct jz_mmc_plat jz_mmc_plat_static = {
390	.cfg = {
391	.name = "MSC",
392	.ops = &jz_msc_ops,
393
394	.voltages = MMC_VDD_27_28 \| MMC_VDD_28_29 \| MMC_VDD_29_30 \|
395	MMC_VDD_30_31 \| MMC_VDD_31_32 \| MMC_VDD_32_33 \|
396	MMC_VDD_33_34 \| MMC_VDD_34_35 \| MMC_VDD_35_36,
397	.host_caps = MMC_MODE_4BIT \| MMC_MODE_HS_52MHz \| MMC_MODE_HS,
398
399	.f_min = 375000,
400	.f_max = 48000000,
401	.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
402	},
403	};
404
405	int jz_mmc_init(void __iomem *base)
406	{
407	struct mmc *mmc;
408
409	jz_mmc_priv_static.regs = base;
410
411	mmc = mmc_create(&jz_mmc_plat_static.cfg, &jz_mmc_priv_static);
412
413	return mmc ? 0 : -ENODEV;
414	}
415
416	#else /* CONFIG_DM_MMC */
417
418	#include <dm.h>
419	DECLARE_GLOBAL_DATA_PTR;
420
421	static int jz_mmc_dm_send_cmd(struct udevice dev, struct mmc_cmd cmd,
422	struct mmc_data *data)
423	{
424	struct jz_mmc_priv *priv = dev_get_priv(dev);
425	struct mmc *mmc = mmc_get_mmc_dev(dev);
426
427	return jz_mmc_send_cmd(mmc, priv, cmd, data);
428	}
429
430	static int jz_mmc_dm_set_ios(struct udevice *dev)
431	{
432	struct jz_mmc_priv *priv = dev_get_priv(dev);
433	struct mmc *mmc = mmc_get_mmc_dev(dev);
434
435	return jz_mmc_set_ios(mmc, priv);
436	};
437
438	static const struct dm_mmc_ops jz_msc_ops = {
439	.send_cmd = jz_mmc_dm_send_cmd,
440	.set_ios = jz_mmc_dm_set_ios,
441	};
442
443	static int jz_mmc_ofdata_to_platdata(struct udevice *dev)
444	{
445	struct jz_mmc_priv *priv = dev_get_priv(dev);
446	struct jz_mmc_plat *plat = dev_get_platdata(dev);
447	struct mmc_config *cfg;
448	int ret;
449
450	priv->regs = map_physmem(devfdt_get_addr(dev), 0x100, MAP_NOCACHE);
451	cfg = &plat->cfg;
452
453	cfg->name = "MSC";
454	cfg->host_caps = MMC_MODE_HS_52MHz \| MMC_MODE_HS;
455
456	ret = mmc_of_parse(dev, cfg);
457	if (ret < 0) {
458	dev_err(dev, "failed to parse host caps\n");
459	return ret;
460	}
461
462	cfg->f_min = 400000;
463	cfg->f_max = 52000000;
464
465	cfg->voltages = MMC_VDD_32_33 \| MMC_VDD_33_34 \| MMC_VDD_165_195;
466	cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
467
468	return 0;
469	}
470
471	static int jz_mmc_bind(struct udevice *dev)
472	{
473	struct jz_mmc_plat *plat = dev_get_platdata(dev);
474
475	return mmc_bind(dev, &plat->mmc, &plat->cfg);
476	}
477
478	static int jz_mmc_probe(struct udevice *dev)
479	{
480	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
481	struct jz_mmc_priv *priv = dev_get_priv(dev);
482	struct jz_mmc_plat *plat = dev_get_platdata(dev);
483
484	plat->mmc.priv = priv;
485	upriv->mmc = &plat->mmc;
486	return jz_mmc_core_init(&plat->mmc);
487	}
488
489	static const struct udevice_id jz_mmc_ids[] = {
490	{ .compatible = "ingenic,jz4780-mmc" },
491	{ }
492	};
493
494	U_BOOT_DRIVER(jz_mmc_drv) = {
495	.name = "jz_mmc",
496	.id = UCLASS_MMC,
497	.of_match = jz_mmc_ids,
498	.ofdata_to_platdata = jz_mmc_ofdata_to_platdata,
499	.bind = jz_mmc_bind,
500	.probe = jz_mmc_probe,
501	.priv_auto_alloc_size = sizeof(struct jz_mmc_priv),
502	.platdata_auto_alloc_size = sizeof(struct jz_mmc_plat),
503	.ops = &jz_msc_ops,
504	};
505	#endif /* CONFIG_DM_MMC */