[linux-2.6-block.git] / drivers / mmc / host / sh_mobile_sdhi.c

/*
 * SuperH Mobile SDHI
 *
 * 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;
};

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,
	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
	.dma_rx_offset	= 0x2000,
};

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, },
	{},
};
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;
	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:
		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 == NULL) {
		dev_err(&pdev->dev, "kzalloc failed\n");
		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;
	}

	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;
	/* SD control register space size is 0x100, 0x200 for bus_shift=1 */
	if (resource_size(res) > 0x100)
		host->bus_shift = 1;
	else
		host->bus_shift = 0;

	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;

	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;
	}

	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	*
	4	* Copyright (C) 2009 Magnus Damm
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	* Based on "Compaq ASIC3 support":
	11	*
	12	* Copyright 2001 Compaq Computer Corporation.
	13	* Copyright 2004-2005 Phil Blundell
	14	* Copyright 2007-2008 OpenedHand Ltd.
	15	*
	16	* Authors: Phil Blundell <pb@handhelds.org>,
	17	* Samuel Ortiz <sameo@openedhand.com>
	18	*
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/clk.h>
5a0e3ad6	23	#include <linux/slab.h>
c7bb4487	24	#include <linux/mod_devicetable.h>
88b47679	25	#include <linux/module.h>
5a00a971	26	#include <linux/of_device.h>
a87d5638	27	#include <linux/platform_device.h>
3c49e810	28	#include <linux/mmc/host.h>
42051e8a	29	#include <linux/mmc/sh_mobile_sdhi.h>
a87d5638	30	#include <linux/mfd/tmio.h>
056676da	31	#include <linux/sh_dma.h>
973ed3af	32	#include <linux/delay.h>
a87d5638	33
42051e8a GL	34	#include "tmio_mmc.h"
42051e8a GL	35
e3c418f1 KM	36	#define EXT_ACC 0xe4
e3c418f1 KM	37
16935250 KM	38	#define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)
16935250 KM	39
5a00a971 GL	40	struct sh_mobile_sdhi_of_data {
5a00a971 GL	41	unsigned long tmio_flags;
b3a5d4ce	42	unsigned long capabilities;
423f6c2e	43	unsigned long capabilities2;
f45394d5	44	enum dma_slave_buswidth dma_buswidth;
384b2cbd	45	dma_addr_t dma_rx_offset;
5a00a971 GL	46	};
	47
	48	static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
	49	{
	50	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
	51	},
	52	};
	53
b3a5d4ce	54	static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
da29fe2b SU	55	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT \| TMIO_MMC_WRPROTECT_DISABLE \|
da29fe2b SU	56	TMIO_MMC_CLK_ACTUAL,
b3a5d4ce KM	57	.capabilities = MMC_CAP_SD_HIGHSPEED \| MMC_CAP_SDIO_IRQ,
	58	};
	59
423f6c2e	60	static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
da29fe2b SU	61	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT \| TMIO_MMC_WRPROTECT_DISABLE \|
da29fe2b SU	62	TMIO_MMC_CLK_ACTUAL,
423f6c2e	63	.capabilities = MMC_CAP_SD_HIGHSPEED \| MMC_CAP_SDIO_IRQ,
f45394d5	64	.dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES,
384b2cbd	65	.dma_rx_offset = 0x2000,
423f6c2e KM	66	};
423f6c2e KM	67
2772ef30 KM	68	static const struct of_device_id sh_mobile_sdhi_of_match[] = {
	69	{ .compatible = "renesas,sdhi-shmobile" },
	70	{ .compatible = "renesas,sdhi-sh7372" },
	71	{ .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], },
	72	{ .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], },
	73	{ .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], },
b3a5d4ce	74	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
81bbbc72	75	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
423f6c2e	76	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
81918d25	77	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
a6386403 GU	78	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
	79	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
	80	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
2772ef30 KM	81	{},
	82	};
	83	MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
	84
a87d5638 MD	85	struct sh_mobile_sdhi {
	86	struct clk *clk;
	87	struct tmio_mmc_data mmc_data;
056676da	88	struct tmio_mmc_dma dma_priv;
a87d5638 MD	89	};
a87d5638 MD	90
f45394d5 KM	91	static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
	92	{
	93	u32 val;
	94
	95	/*
	96	* see also
	97	* sh_mobile_sdhi_of_data :: dma_buswidth
	98	*/
	99	switch (sd_ctrl_read16(host, CTL_VERSION)) {
	100	case 0x490C:
	101	val = (width == 32) ? 0x0001 : 0x0000;
	102	break;
	103	case 0xCB0D:
	104	val = (width == 32) ? 0x0000 : 0x0001;
	105	break;
	106	default:
	107	/* nothing to do */
	108	return;
	109	}
	110
	111	sd_ctrl_write16(host, EXT_ACC, val);
	112	}
	113
56c49287 GL	114	static int sh_mobile_sdhi_clk_enable(struct platform_device pdev, unsigned int f)
56c49287 GL	115	{
6e2c0f3f	116	struct mmc_host *mmc = platform_get_drvdata(pdev);
56c49287	117	struct tmio_mmc_host *host = mmc_priv(mmc);
16935250	118	struct sh_mobile_sdhi *priv = host_to_priv(host);
00fb3d2a	119	int ret = clk_prepare_enable(priv->clk);
56c49287 GL	120	if (ret < 0)
	121	return ret;
	122
	123	*f = clk_get_rate(priv->clk);
f45394d5 KM	124
	125	/* enable 16bit data access on SDBUF as default */
	126	sh_mobile_sdhi_sdbuf_width(host, 16);
	127
56c49287 GL	128	return 0;
	129	}
	130
	131	static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
	132	{
6e2c0f3f	133	struct mmc_host *mmc = platform_get_drvdata(pdev);
56c49287	134	struct tmio_mmc_host *host = mmc_priv(mmc);
16935250	135	struct sh_mobile_sdhi *priv = host_to_priv(host);
00fb3d2a	136	clk_disable_unprepare(priv->clk);
56c49287 GL	137	}
56c49287 GL	138
973ed3af SH	139	static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
	140	{
	141	int timeout = 1000;
	142
	143	while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
	144	udelay(1);
	145
	146	if (!timeout) {
94b110af	147	dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
973ed3af SH	148	return -EBUSY;
	149	}
	150
	151	return 0;
	152	}
	153
	154	static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
	155	{
	156	switch (addr)
	157	{
	158	case CTL_SD_CMD:
	159	case CTL_STOP_INTERNAL_ACTION:
	160	case CTL_XFER_BLK_COUNT:
	161	case CTL_SD_CARD_CLK_CTL:
	162	case CTL_SD_XFER_LEN:
	163	case CTL_SD_MEM_CARD_OPT:
	164	case CTL_TRANSACTION_CTL:
	165	case CTL_DMA_ENABLE:
	166	return sh_mobile_sdhi_wait_idle(host);
	167	}
	168
	169	return 0;
	170	}
	171
8b4efe2f KM	172	static int sh_mobile_sdhi_multi_io_quirk(struct mmc_card *card,
	173	unsigned int direction, int blk_size)
	174	{
	175	/*
	176	* In Renesas controllers, when performing a
	177	* multiple block read of one or two blocks,
	178	* depending on the timing with which the
	179	* response register is read, the response
	180	* value may not be read properly.
	181	* Use single block read for this HW bug
	182	*/
	183	if ((direction == MMC_DATA_READ) &&
	184	blk_size == 2)
	185	return 1;
	186
	187	return blk_size;
	188	}
	189
0c47f6ae KM	190	static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
	191	{
	192	sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0);
f45394d5 KM	193
	194	/* enable 32bit access if DMA mode if possibile */
	195	sh_mobile_sdhi_sdbuf_width(host, enable ? 32 : 16);
0c47f6ae KM	196	}
0c47f6ae KM	197
c3be1efd	198	static int sh_mobile_sdhi_probe(struct platform_device *pdev)
a87d5638	199	{
5a00a971 GL	200	const struct of_device_id *of_id =
5a00a971 GL	201	of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
a87d5638	202	struct sh_mobile_sdhi *priv;
056676da	203	struct tmio_mmc_data *mmc_data;
f33c9d65	204	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
42051e8a	205	struct tmio_mmc_host *host;
3b159a6e	206	struct resource *res;
d5098cb6 SH	207	int irq, ret, i = 0;
d5098cb6 SH	208	bool multiplexed_isr = true;
87ae7bbe	209	struct tmio_mmc_dma *dma_priv;
a87d5638	210
3b159a6e KM	211	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	212	if (!res)
	213	return -EINVAL;
	214
ac51b961	215	priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
a87d5638 MD	216	if (priv == NULL) {
	217	dev_err(&pdev->dev, "kzalloc failed\n");
	218	return -ENOMEM;
	219	}
	220
056676da	221	mmc_data = &priv->mmc_data;
87ae7bbe	222	dma_priv = &priv->dma_priv;
056676da	223
ac51b961	224	priv->clk = devm_clk_get(&pdev->dev, NULL);
a87d5638	225	if (IS_ERR(priv->clk)) {
a87d5638	226	ret = PTR_ERR(priv->clk);
56ae1adc	227	dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
010f4aa7	228	goto eprobe;
a87d5638 MD	229	}
a87d5638 MD	230
94b110af KM	231	host = tmio_mmc_host_alloc(pdev);
	232	if (!host) {
	233	ret = -ENOMEM;
	234	goto eprobe;
	235	}
	236
7ecc09ba	237	host->dma = dma_priv;
dfe9a229	238	host->write16_hook = sh_mobile_sdhi_write16_hook;
4fe2ec57	239	host->clk_enable = sh_mobile_sdhi_clk_enable;
00452c11	240	host->clk_disable = sh_mobile_sdhi_clk_disable;
85c02ddd	241	host->multi_io_quirk = sh_mobile_sdhi_multi_io_quirk;
7445bf9e	242	/* SD control register space size is 0x100, 0x200 for bus_shift=1 */
95a7dc36 KM	243	if (resource_size(res) > 0x100)
	244	host->bus_shift = 1;
	245	else
	246	host->bus_shift = 0;
7ecc09ba	247
84f11d5b	248	if (mmd)
f33c9d65	249	mmc_data = mmd;
84f11d5b	250
87ae7bbe	251	dma_priv->filter = shdma_chan_filter;
0c47f6ae	252	dma_priv->enable = sh_mobile_sdhi_enable_dma;
87ae7bbe	253
e471df0b	254	mmc_data->alignment_shift = 1; /* 2-byte alignment */
f33c9d65	255	mmc_data->capabilities \|= MMC_CAP_MMC_HIGHSPEED;
e471df0b	256
f1334fb3 YG	257	/*
	258	* All SDHI blocks support 2-byte and larger block sizes in 4-bit
	259	* bus width mode.
	260	*/
	261	mmc_data->flags \|= TMIO_MMC_BLKSZ_2BYTES;
	262
23b66071 AH	263	/*
	264	* All SDHI blocks support SDIO IRQ signalling.
	265	*/
	266	mmc_data->flags \|= TMIO_MMC_SDIO_IRQ;
	267
b8d11962 SU	268	/*
	269	* All SDHI have CMD12 controll bit
	270	*/
	271	mmc_data->flags \|= TMIO_MMC_HAVE_CMD12_CTRL;
	272
6b98757e SU	273	/*
	274	* All SDHI need SDIO_INFO1 reserved bit
	275	*/
	276	mmc_data->flags \|= TMIO_MMC_SDIO_STATUS_QUIRK;
	277
5a00a971 GL	278	if (of_id && of_id->data) {
	279	const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
	280	mmc_data->flags \|= of_data->tmio_flags;
b3a5d4ce	281	mmc_data->capabilities \|= of_data->capabilities;
423f6c2e	282	mmc_data->capabilities2 \|= of_data->capabilities2;
8b4c8f32	283	mmc_data->dma_rx_offset = of_data->dma_rx_offset;
f45394d5	284	dma_priv->dma_buswidth = of_data->dma_buswidth;
5a00a971 GL	285	}
5a00a971 GL	286
94b110af	287	ret = tmio_mmc_host_probe(host, mmc_data);
42051e8a	288	if (ret < 0)
94b110af	289	goto efree;
a87d5638	290
d5098cb6 SH	291	/*
	292	* Allow one or more specific (named) ISRs or
	293	* one or more multiplexed (un-named) ISRs.
	294	*/
	295
	296	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
	297	if (irq >= 0) {
	298	multiplexed_isr = false;
ac51b961	299	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0,
d5098cb6 SH	300	dev_name(&pdev->dev), host);
d5098cb6 SH	301	if (ret)
ac51b961	302	goto eirq;
d5098cb6 SH	303	}
	304
	305	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
	306	if (irq >= 0) {
	307	multiplexed_isr = false;
ac51b961	308	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0,
d5098cb6 SH	309	dev_name(&pdev->dev), host);
d5098cb6 SH	310	if (ret)
ac51b961	311	goto eirq;
d5098cb6 SH	312	}
	313
	314	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
	315	if (irq >= 0) {
	316	multiplexed_isr = false;
ac51b961	317	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0,
d6a1f863	318	dev_name(&pdev->dev), host);
d5098cb6	319	if (ret)
ac51b961	320	goto eirq;
d5098cb6 SH	321	} else if (!multiplexed_isr) {
	322	dev_err(&pdev->dev,
	323	"Principal SD-card IRQ is missing among named interrupts\n");
	324	ret = irq;
ac51b961	325	goto eirq;
d5098cb6 SH	326	}
	327
	328	if (multiplexed_isr) {
	329	while (1) {
	330	irq = platform_get_irq(pdev, i);
	331	if (irq < 0)
	332	break;
	333	i++;
ac51b961	334	ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
d5098cb6 SH	335	dev_name(&pdev->dev), host);
d5098cb6 SH	336	if (ret)
ac51b961	337	goto eirq;
d6a1f863	338	}
d5098cb6 SH	339
d5098cb6 SH	340	/* There must be at least one IRQ source */
7913ae7d WY	341	if (!i) {
7913ae7d WY	342	ret = irq;
ac51b961	343	goto eirq;
7913ae7d	344	}
8e7bfdb3	345	}
d5098cb6	346
1f7d6819 MD	347	dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
1f7d6819 MD	348	mmc_hostname(host->mmc), (unsigned long)
58126c87	349	(platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
369213bd	350	host->mmc->f_max / 1000000);
a87d5638	351
42051e8a	352	return ret;
a87d5638	353
ac51b961	354	eirq:
8e7bfdb3	355	tmio_mmc_host_remove(host);
94b110af KM	356	efree:
94b110af KM	357	tmio_mmc_host_free(host);
42051e8a	358	eprobe:
a87d5638 MD	359	return ret;
	360	}
	361
	362	static int sh_mobile_sdhi_remove(struct platform_device *pdev)
	363	{
42051e8a GL	364	struct mmc_host *mmc = platform_get_drvdata(pdev);
42051e8a GL	365	struct tmio_mmc_host *host = mmc_priv(mmc);
d6a1f863	366
742a0c7c GL	367	tmio_mmc_host_remove(host);
742a0c7c GL	368
a87d5638 MD	369	return 0;
	370	}
	371
e6ee7182	372	static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
753a688c UH	373	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
753a688c UH	374	pm_runtime_force_resume)
6ed23b80	375	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
4e262d7f UH	376	tmio_mmc_host_runtime_resume,
4e262d7f UH	377	NULL)
e6ee7182 GL	378	};
e6ee7182 GL	379
a87d5638 MD	380	static struct platform_driver sh_mobile_sdhi_driver = {
	381	.driver = {
	382	.name = "sh_mobile_sdhi",
e6ee7182	383	.pm = &tmio_mmc_dev_pm_ops,
c7bb4487	384	.of_match_table = sh_mobile_sdhi_of_match,
a87d5638 MD	385	},
a87d5638 MD	386	.probe = sh_mobile_sdhi_probe,
0433c143	387	.remove = sh_mobile_sdhi_remove,
a87d5638 MD	388	};
a87d5638 MD	389
d1f81a64	390	module_platform_driver(sh_mobile_sdhi_driver);
a87d5638 MD	391
	392	MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
	393	MODULE_AUTHOR("Magnus Damm");
	394	MODULE_LICENSE("GPL v2");
42051e8a	395	MODULE_ALIAS("platform:sh_mobile_sdhi");