[deliverable/linux.git] / drivers / mmc / host / sh_mobile_sdhi.c

/*
 * SuperH Mobile SDHI
 *
 * Copyright (C) 2016 Sang Engineering, Wolfram Sang
 * Copyright (C) 2015-16 Renesas Electronics Corporation
 * Copyright (C) 2009 Magnus Damm
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Based on "Compaq ASIC3 support":
 *
 * Copyright 2001 Compaq Computer Corporation.
 * Copyright 2004-2005 Phil Blundell
 * Copyright 2007-2008 OpenedHand Ltd.
 *
 * Authors: Phil Blundell <pb@handhelds.org>,
 *	    Samuel Ortiz <sameo@openedhand.com>
 *
 */

#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sh_mobile_sdhi.h>
#include <linux/mfd/tmio.h>
#include <linux/sh_dma.h>
#include <linux/delay.h>

#include "tmio_mmc.h"

#define EXT_ACC           0xe4

#define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)

struct sh_mobile_sdhi_of_data {
	unsigned long tmio_flags;
	unsigned long capabilities;
	unsigned long capabilities2;
	enum dma_slave_buswidth dma_buswidth;
	dma_addr_t dma_rx_offset;
	unsigned bus_shift;
};

static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
	{
		.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
	},
};

static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
			  TMIO_MMC_CLK_ACTUAL,
	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
};

static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
	.dma_rx_offset	= 0x2000,
};

static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
	.capabilities	= MMC_CAP_SD_HIGHSPEED,
	.bus_shift	= 2,
};

static const struct of_device_id sh_mobile_sdhi_of_match[] = {
	{ .compatible = "renesas,sdhi-shmobile" },
	{ .compatible = "renesas,sdhi-sh7372" },
	{ .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], },
	{ .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], },
	{ .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], },
	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
	{ .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_gen3_compatible, },
	{},
};
MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);

struct sh_mobile_sdhi {
	struct clk *clk;
	struct tmio_mmc_data mmc_data;
	struct tmio_mmc_dma dma_priv;
};

static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
{
	u32 val;

	/*
	 * see also
	 *	sh_mobile_sdhi_of_data :: dma_buswidth
	 */
	switch (sd_ctrl_read16(host, CTL_VERSION)) {
	case 0x490C:
		val = (width == 32) ? 0x0001 : 0x0000;
		break;
	case 0xCB0D:
		val = (width == 32) ? 0x0000 : 0x0001;
		break;
	case 0xCC10: /* Gen3, SD only */
	case 0xCD10: /* Gen3, SD + MMC */
		if (width == 64)
			val = 0x0000;
		else if (width == 32)
			val = 0x0101;
		else
			val = 0x0001;
		break;
	default:
		/* nothing to do */
		return;
	}

	sd_ctrl_write16(host, EXT_ACC, val);
}

static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int *f)
{
	struct mmc_host *mmc = platform_get_drvdata(pdev);
	struct tmio_mmc_host *host = mmc_priv(mmc);
	struct sh_mobile_sdhi *priv = host_to_priv(host);
	int ret = clk_prepare_enable(priv->clk);
	if (ret < 0)
		return ret;

	*f = clk_get_rate(priv->clk);

	/* enable 16bit data access on SDBUF as default */
	sh_mobile_sdhi_sdbuf_width(host, 16);

	return 0;
}

static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
{
	struct mmc_host *mmc = platform_get_drvdata(pdev);
	struct tmio_mmc_host *host = mmc_priv(mmc);
	struct sh_mobile_sdhi *priv = host_to_priv(host);
	clk_disable_unprepare(priv->clk);
}

static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
{
	int timeout = 1000;

	while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
		udelay(1);

	if (!timeout) {
		dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
		return -EBUSY;
	}

	return 0;
}

static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
{
	switch (addr)
	{
	case CTL_SD_CMD:
	case CTL_STOP_INTERNAL_ACTION:
	case CTL_XFER_BLK_COUNT:
	case CTL_SD_CARD_CLK_CTL:
	case CTL_SD_XFER_LEN:
	case CTL_SD_MEM_CARD_OPT:
	case CTL_TRANSACTION_CTL:
	case CTL_DMA_ENABLE:
	case EXT_ACC:
		return sh_mobile_sdhi_wait_idle(host);
	}

	return 0;
}

static int sh_mobile_sdhi_multi_io_quirk(struct mmc_card *card,
					 unsigned int direction, int blk_size)
{
	/*
	 * In Renesas controllers, when performing a
	 * multiple block read of one or two blocks,
	 * depending on the timing with which the
	 * response register is read, the response
	 * value may not be read properly.
	 * Use single block read for this HW bug
	 */
	if ((direction == MMC_DATA_READ) &&
	    blk_size == 2)
		return 1;

	return blk_size;
}

static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
{
	sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0);

	/* enable 32bit access if DMA mode if possibile */
	sh_mobile_sdhi_sdbuf_width(host, enable ? 32 : 16);
}

static int sh_mobile_sdhi_probe(struct platform_device *pdev)
{
	const struct of_device_id *of_id =
		of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
	struct sh_mobile_sdhi *priv;
	struct tmio_mmc_data *mmc_data;
	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
	struct tmio_mmc_host *host;
	struct resource *res;
	int irq, ret, i = 0;
	bool multiplexed_isr = true;
	struct tmio_mmc_dma *dma_priv;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -EINVAL;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	mmc_data = &priv->mmc_data;
	dma_priv = &priv->dma_priv;

	priv->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(priv->clk)) {
		ret = PTR_ERR(priv->clk);
		dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
		goto eprobe;
	}

	host = tmio_mmc_host_alloc(pdev);
	if (!host) {
		ret = -ENOMEM;
		goto eprobe;
	}

	if (of_id && of_id->data) {
		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;

		mmc_data->flags |= of_data->tmio_flags;
		mmc_data->capabilities |= of_data->capabilities;
		mmc_data->capabilities2 |= of_data->capabilities2;
		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
		dma_priv->dma_buswidth = of_data->dma_buswidth;
		host->bus_shift = of_data->bus_shift;
	}

	host->dma		= dma_priv;
	host->write16_hook	= sh_mobile_sdhi_write16_hook;
	host->clk_enable	= sh_mobile_sdhi_clk_enable;
	host->clk_disable	= sh_mobile_sdhi_clk_disable;
	host->multi_io_quirk	= sh_mobile_sdhi_multi_io_quirk;

	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
	if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
		host->bus_shift = 1;

	if (mmd)
		*mmc_data = *mmd;

	dma_priv->filter = shdma_chan_filter;
	dma_priv->enable = sh_mobile_sdhi_enable_dma;

	mmc_data->alignment_shift = 1; /* 2-byte alignment */
	mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED;

	/*
	 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
	 * bus width mode.
	 */
	mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;

	/*
	 * All SDHI blocks support SDIO IRQ signalling.
	 */
	mmc_data->flags |= TMIO_MMC_SDIO_IRQ;

	/*
	 * All SDHI have CMD12 controll bit
	 */
	mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;

	/*
	 * All SDHI need SDIO_INFO1 reserved bit
	 */
	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK;

	ret = tmio_mmc_host_probe(host, mmc_data);
	if (ret < 0)
		goto efree;

	/*
	 * Allow one or more specific (named) ISRs or
	 * one or more multiplexed (un-named) ISRs.
	 */

	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
	if (irq >= 0) {
		multiplexed_isr = false;
		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0,
				  dev_name(&pdev->dev), host);
		if (ret)
			goto eirq;
	}

	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
	if (irq >= 0) {
		multiplexed_isr = false;
		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0,
				  dev_name(&pdev->dev), host);
		if (ret)
			goto eirq;
	}

	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
	if (irq >= 0) {
		multiplexed_isr = false;
		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0,
				  dev_name(&pdev->dev), host);
		if (ret)
			goto eirq;
	} else if (!multiplexed_isr) {
		dev_err(&pdev->dev,
			"Principal SD-card IRQ is missing among named interrupts\n");
		ret = irq;
		goto eirq;
	}

	if (multiplexed_isr) {
		while (1) {
			irq = platform_get_irq(pdev, i);
			if (irq < 0)
				break;
			i++;
			ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
					  dev_name(&pdev->dev), host);
			if (ret)
				goto eirq;
		}

		/* There must be at least one IRQ source */
		if (!i) {
			ret = irq;
			goto eirq;
		}
	}

	dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
		 mmc_hostname(host->mmc), (unsigned long)
		 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
		 host->mmc->f_max / 1000000);

	return ret;

eirq:
	tmio_mmc_host_remove(host);
efree:
	tmio_mmc_host_free(host);
eprobe:
	return ret;
}

static int sh_mobile_sdhi_remove(struct platform_device *pdev)
{
	struct mmc_host *mmc = platform_get_drvdata(pdev);
	struct tmio_mmc_host *host = mmc_priv(mmc);

	tmio_mmc_host_remove(host);

	return 0;
}

static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
			pm_runtime_force_resume)
	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
			tmio_mmc_host_runtime_resume,
			NULL)
};

static struct platform_driver sh_mobile_sdhi_driver = {
	.driver		= {
		.name	= "sh_mobile_sdhi",
		.pm	= &tmio_mmc_dev_pm_ops,
		.of_match_table = sh_mobile_sdhi_of_match,
	},
	.probe		= sh_mobile_sdhi_probe,
	.remove		= sh_mobile_sdhi_remove,
};

module_platform_driver(sh_mobile_sdhi_driver);

MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
MODULE_AUTHOR("Magnus Damm");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:sh_mobile_sdhi");
Commit	Line	Data
a87d5638 MD	1	/*
	2	* SuperH Mobile SDHI
	3	*
a72e8b17 WS	4	* Copyright (C) 2016 Sang Engineering, Wolfram Sang
a72e8b17 WS	5	* Copyright (C) 2015-16 Renesas Electronics Corporation
a87d5638 MD	6	* Copyright (C) 2009 Magnus Damm
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	* Based on "Compaq ASIC3 support":
	13	*
	14	* Copyright 2001 Compaq Computer Corporation.
	15	* Copyright 2004-2005 Phil Blundell
	16	* Copyright 2007-2008 OpenedHand Ltd.
	17	*
	18	* Authors: Phil Blundell <pb@handhelds.org>,
	19	* Samuel Ortiz <sameo@openedhand.com>
	20	*
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/clk.h>
5a0e3ad6	25	#include <linux/slab.h>
c7bb4487	26	#include <linux/mod_devicetable.h>
88b47679	27	#include <linux/module.h>
5a00a971	28	#include <linux/of_device.h>
a87d5638	29	#include <linux/platform_device.h>
3c49e810	30	#include <linux/mmc/host.h>
42051e8a	31	#include <linux/mmc/sh_mobile_sdhi.h>
a87d5638	32	#include <linux/mfd/tmio.h>
056676da	33	#include <linux/sh_dma.h>
973ed3af	34	#include <linux/delay.h>
a87d5638	35
42051e8a GL	36	#include "tmio_mmc.h"
42051e8a GL	37
e3c418f1 KM	38	#define EXT_ACC 0xe4
e3c418f1 KM	39
16935250 KM	40	#define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)
16935250 KM	41
5a00a971 GL	42	struct sh_mobile_sdhi_of_data {
5a00a971 GL	43	unsigned long tmio_flags;
b3a5d4ce	44	unsigned long capabilities;
423f6c2e	45	unsigned long capabilities2;
f45394d5	46	enum dma_slave_buswidth dma_buswidth;
384b2cbd	47	dma_addr_t dma_rx_offset;
a72e8b17	48	unsigned bus_shift;
5a00a971 GL	49	};
	50
	51	static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
	52	{
	53	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
	54	},
	55	};
	56
b3a5d4ce	57	static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
da29fe2b SU	58	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT \| TMIO_MMC_WRPROTECT_DISABLE \|
da29fe2b SU	59	TMIO_MMC_CLK_ACTUAL,
b3a5d4ce KM	60	.capabilities = MMC_CAP_SD_HIGHSPEED \| MMC_CAP_SDIO_IRQ,
	61	};
	62
423f6c2e	63	static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
da29fe2b	64	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT \| TMIO_MMC_WRPROTECT_DISABLE \|
16a65524	65	TMIO_MMC_CLK_ACTUAL \| TMIO_MMC_FAST_CLK_CHG,
423f6c2e	66	.capabilities = MMC_CAP_SD_HIGHSPEED \| MMC_CAP_SDIO_IRQ,
f45394d5	67	.dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES,
384b2cbd	68	.dma_rx_offset = 0x2000,
423f6c2e KM	69	};
423f6c2e KM	70
a72e8b17 WS	71	static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
	72	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT \| TMIO_MMC_WRPROTECT_DISABLE \|
	73	TMIO_MMC_CLK_ACTUAL \| TMIO_MMC_FAST_CLK_CHG,
	74	.capabilities = MMC_CAP_SD_HIGHSPEED,
	75	.bus_shift = 2,
	76	};
	77
2772ef30 KM	78	static const struct of_device_id sh_mobile_sdhi_of_match[] = {
	79	{ .compatible = "renesas,sdhi-shmobile" },
	80	{ .compatible = "renesas,sdhi-sh7372" },
	81	{ .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], },
	82	{ .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], },
	83	{ .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], },
b3a5d4ce	84	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
81bbbc72	85	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
423f6c2e	86	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
81918d25	87	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
a6386403 GU	88	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
	89	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
	90	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
a72e8b17	91	{ .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_gen3_compatible, },
2772ef30 KM	92	{},
	93	};
	94	MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
	95
a87d5638 MD	96	struct sh_mobile_sdhi {
	97	struct clk *clk;
	98	struct tmio_mmc_data mmc_data;
056676da	99	struct tmio_mmc_dma dma_priv;
a87d5638 MD	100	};
a87d5638 MD	101
f45394d5 KM	102	static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
	103	{
	104	u32 val;
	105
	106	/*
	107	* see also
	108	* sh_mobile_sdhi_of_data :: dma_buswidth
	109	*/
	110	switch (sd_ctrl_read16(host, CTL_VERSION)) {
	111	case 0x490C:
	112	val = (width == 32) ? 0x0001 : 0x0000;
	113	break;
	114	case 0xCB0D:
	115	val = (width == 32) ? 0x0000 : 0x0001;
	116	break;
a72e8b17 WS	117	case 0xCC10: /* Gen3, SD only */
	118	case 0xCD10: /* Gen3, SD + MMC */
	119	if (width == 64)
	120	val = 0x0000;
	121	else if (width == 32)
	122	val = 0x0101;
	123	else
	124	val = 0x0001;
	125	break;
f45394d5 KM	126	default:
	127	/* nothing to do */
	128	return;
	129	}
	130
	131	sd_ctrl_write16(host, EXT_ACC, val);
	132	}
	133
56c49287 GL	134	static int sh_mobile_sdhi_clk_enable(struct platform_device pdev, unsigned int f)
56c49287 GL	135	{
6e2c0f3f	136	struct mmc_host *mmc = platform_get_drvdata(pdev);
56c49287	137	struct tmio_mmc_host *host = mmc_priv(mmc);
16935250	138	struct sh_mobile_sdhi *priv = host_to_priv(host);
00fb3d2a	139	int ret = clk_prepare_enable(priv->clk);
56c49287 GL	140	if (ret < 0)
	141	return ret;
	142
	143	*f = clk_get_rate(priv->clk);
f45394d5 KM	144
	145	/* enable 16bit data access on SDBUF as default */
	146	sh_mobile_sdhi_sdbuf_width(host, 16);
	147
56c49287 GL	148	return 0;
	149	}
	150
	151	static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
	152	{
6e2c0f3f	153	struct mmc_host *mmc = platform_get_drvdata(pdev);
56c49287	154	struct tmio_mmc_host *host = mmc_priv(mmc);
16935250	155	struct sh_mobile_sdhi *priv = host_to_priv(host);
00fb3d2a	156	clk_disable_unprepare(priv->clk);
56c49287 GL	157	}
56c49287 GL	158
973ed3af SH	159	static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
	160	{
	161	int timeout = 1000;
	162
	163	while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
	164	udelay(1);
	165
	166	if (!timeout) {
94b110af	167	dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
973ed3af SH	168	return -EBUSY;
	169	}
	170
	171	return 0;
	172	}
	173
	174	static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
	175	{
	176	switch (addr)
	177	{
	178	case CTL_SD_CMD:
	179	case CTL_STOP_INTERNAL_ACTION:
	180	case CTL_XFER_BLK_COUNT:
	181	case CTL_SD_CARD_CLK_CTL:
	182	case CTL_SD_XFER_LEN:
	183	case CTL_SD_MEM_CARD_OPT:
	184	case CTL_TRANSACTION_CTL:
	185	case CTL_DMA_ENABLE:
ff741cfd	186	case EXT_ACC:
973ed3af SH	187	return sh_mobile_sdhi_wait_idle(host);
	188	}
	189
	190	return 0;
	191	}
	192
8b4efe2f KM	193	static int sh_mobile_sdhi_multi_io_quirk(struct mmc_card *card,
	194	unsigned int direction, int blk_size)
	195	{
	196	/*
	197	* In Renesas controllers, when performing a
	198	* multiple block read of one or two blocks,
	199	* depending on the timing with which the
	200	* response register is read, the response
	201	* value may not be read properly.
	202	* Use single block read for this HW bug
	203	*/
	204	if ((direction == MMC_DATA_READ) &&
	205	blk_size == 2)
	206	return 1;
	207
	208	return blk_size;
	209	}
	210
0c47f6ae KM	211	static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
	212	{
	213	sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0);
f45394d5 KM	214
	215	/* enable 32bit access if DMA mode if possibile */
	216	sh_mobile_sdhi_sdbuf_width(host, enable ? 32 : 16);
0c47f6ae KM	217	}
0c47f6ae KM	218
c3be1efd	219	static int sh_mobile_sdhi_probe(struct platform_device *pdev)
a87d5638	220	{
5a00a971 GL	221	const struct of_device_id *of_id =
5a00a971 GL	222	of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
a87d5638	223	struct sh_mobile_sdhi *priv;
056676da	224	struct tmio_mmc_data *mmc_data;
f33c9d65	225	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
42051e8a	226	struct tmio_mmc_host *host;
3b159a6e	227	struct resource *res;
d5098cb6 SH	228	int irq, ret, i = 0;
d5098cb6 SH	229	bool multiplexed_isr = true;
87ae7bbe	230	struct tmio_mmc_dma *dma_priv;
a87d5638	231
3b159a6e KM	232	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	233	if (!res)
	234	return -EINVAL;
	235
ac51b961	236	priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
2bf8ab6b	237	if (!priv)
a87d5638	238	return -ENOMEM;
a87d5638	239
056676da	240	mmc_data = &priv->mmc_data;
87ae7bbe	241	dma_priv = &priv->dma_priv;
056676da	242
ac51b961	243	priv->clk = devm_clk_get(&pdev->dev, NULL);
a87d5638	244	if (IS_ERR(priv->clk)) {
a87d5638	245	ret = PTR_ERR(priv->clk);
56ae1adc	246	dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
010f4aa7	247	goto eprobe;
a87d5638 MD	248	}
a87d5638 MD	249
94b110af KM	250	host = tmio_mmc_host_alloc(pdev);
	251	if (!host) {
	252	ret = -ENOMEM;
	253	goto eprobe;
	254	}
	255
a72e8b17 WS	256	if (of_id && of_id->data) {
	257	const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
	258
	259	mmc_data->flags \|= of_data->tmio_flags;
	260	mmc_data->capabilities \|= of_data->capabilities;
	261	mmc_data->capabilities2 \|= of_data->capabilities2;
	262	mmc_data->dma_rx_offset = of_data->dma_rx_offset;
	263	dma_priv->dma_buswidth = of_data->dma_buswidth;
	264	host->bus_shift = of_data->bus_shift;
	265	}
	266
7ecc09ba	267	host->dma = dma_priv;
dfe9a229	268	host->write16_hook = sh_mobile_sdhi_write16_hook;
4fe2ec57	269	host->clk_enable = sh_mobile_sdhi_clk_enable;
00452c11	270	host->clk_disable = sh_mobile_sdhi_clk_disable;
85c02ddd	271	host->multi_io_quirk = sh_mobile_sdhi_multi_io_quirk;
a72e8b17 WS	272
	273	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
	274	if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
95a7dc36	275	host->bus_shift = 1;
7ecc09ba	276
84f11d5b	277	if (mmd)
f33c9d65	278	mmc_data = mmd;
84f11d5b	279
87ae7bbe	280	dma_priv->filter = shdma_chan_filter;
0c47f6ae	281	dma_priv->enable = sh_mobile_sdhi_enable_dma;
87ae7bbe	282
e471df0b	283	mmc_data->alignment_shift = 1; /* 2-byte alignment */
f33c9d65	284	mmc_data->capabilities \|= MMC_CAP_MMC_HIGHSPEED;
e471df0b	285
f1334fb3 YG	286	/*
	287	* All SDHI blocks support 2-byte and larger block sizes in 4-bit
	288	* bus width mode.
	289	*/
	290	mmc_data->flags \|= TMIO_MMC_BLKSZ_2BYTES;
	291
23b66071 AH	292	/*
	293	* All SDHI blocks support SDIO IRQ signalling.
	294	*/
	295	mmc_data->flags \|= TMIO_MMC_SDIO_IRQ;
	296
b8d11962 SU	297	/*
	298	* All SDHI have CMD12 controll bit
	299	*/
	300	mmc_data->flags \|= TMIO_MMC_HAVE_CMD12_CTRL;
	301
6b98757e SU	302	/*
	303	* All SDHI need SDIO_INFO1 reserved bit
	304	*/
	305	mmc_data->flags \|= TMIO_MMC_SDIO_STATUS_QUIRK;
	306
94b110af	307	ret = tmio_mmc_host_probe(host, mmc_data);
42051e8a	308	if (ret < 0)
94b110af	309	goto efree;
a87d5638	310
d5098cb6 SH	311	/*
	312	* Allow one or more specific (named) ISRs or
	313	* one or more multiplexed (un-named) ISRs.
	314	*/
	315
	316	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
	317	if (irq >= 0) {
	318	multiplexed_isr = false;
ac51b961	319	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0,
d5098cb6 SH	320	dev_name(&pdev->dev), host);
d5098cb6 SH	321	if (ret)
ac51b961	322	goto eirq;
d5098cb6 SH	323	}
	324
	325	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
	326	if (irq >= 0) {
	327	multiplexed_isr = false;
ac51b961	328	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0,
d5098cb6 SH	329	dev_name(&pdev->dev), host);
d5098cb6 SH	330	if (ret)
ac51b961	331	goto eirq;
d5098cb6 SH	332	}
	333
	334	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
	335	if (irq >= 0) {
	336	multiplexed_isr = false;
ac51b961	337	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0,
d6a1f863	338	dev_name(&pdev->dev), host);
d5098cb6	339	if (ret)
ac51b961	340	goto eirq;
d5098cb6 SH	341	} else if (!multiplexed_isr) {
	342	dev_err(&pdev->dev,
	343	"Principal SD-card IRQ is missing among named interrupts\n");
	344	ret = irq;
ac51b961	345	goto eirq;
d5098cb6 SH	346	}
	347
	348	if (multiplexed_isr) {
	349	while (1) {
	350	irq = platform_get_irq(pdev, i);
	351	if (irq < 0)
	352	break;
	353	i++;
ac51b961	354	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
d5098cb6 SH	355	dev_name(&pdev->dev), host);
d5098cb6 SH	356	if (ret)
ac51b961	357	goto eirq;
d6a1f863	358	}
d5098cb6 SH	359
d5098cb6 SH	360	/* There must be at least one IRQ source */
7913ae7d WY	361	if (!i) {
7913ae7d WY	362	ret = irq;
ac51b961	363	goto eirq;
7913ae7d	364	}
8e7bfdb3	365	}
d5098cb6	366
1f7d6819 MD	367	dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
1f7d6819 MD	368	mmc_hostname(host->mmc), (unsigned long)
58126c87	369	(platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
369213bd	370	host->mmc->f_max / 1000000);
a87d5638	371
42051e8a	372	return ret;
a87d5638	373
ac51b961	374	eirq:
8e7bfdb3	375	tmio_mmc_host_remove(host);
94b110af KM	376	efree:
94b110af KM	377	tmio_mmc_host_free(host);
42051e8a	378	eprobe:
a87d5638 MD	379	return ret;
	380	}
	381
	382	static int sh_mobile_sdhi_remove(struct platform_device *pdev)
	383	{
42051e8a GL	384	struct mmc_host *mmc = platform_get_drvdata(pdev);
42051e8a GL	385	struct tmio_mmc_host *host = mmc_priv(mmc);
d6a1f863	386
742a0c7c GL	387	tmio_mmc_host_remove(host);
742a0c7c GL	388
a87d5638 MD	389	return 0;
	390	}
	391
e6ee7182	392	static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
753a688c UH	393	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
753a688c UH	394	pm_runtime_force_resume)
6ed23b80	395	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
4e262d7f UH	396	tmio_mmc_host_runtime_resume,
4e262d7f UH	397	NULL)
e6ee7182 GL	398	};
e6ee7182 GL	399
a87d5638 MD	400	static struct platform_driver sh_mobile_sdhi_driver = {
	401	.driver = {
	402	.name = "sh_mobile_sdhi",
e6ee7182	403	.pm = &tmio_mmc_dev_pm_ops,
c7bb4487	404	.of_match_table = sh_mobile_sdhi_of_match,
a87d5638 MD	405	},
a87d5638 MD	406	.probe = sh_mobile_sdhi_probe,
0433c143	407	.remove = sh_mobile_sdhi_remove,
a87d5638 MD	408	};
a87d5638 MD	409
d1f81a64	410	module_platform_driver(sh_mobile_sdhi_driver);
a87d5638 MD	411
	412	MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
	413	MODULE_AUTHOR("Magnus Damm");
	414	MODULE_LICENSE("GPL v2");
42051e8a	415	MODULE_ALIAS("platform:sh_mobile_sdhi");