[net-next-2.6.git] / drivers / mmc / host / sdhci-pltfm.c

/*
 * sdhci-pltfm.c Support for SDHCI platform devices
 * Copyright (c) 2009 Intel Corporation
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/* Supports:
 * SDHCI platform devices
 *
 * Inspired by sdhci-pci.c, by Pierre Ossman
 */

#include <linux/delay.h>
#include <linux/highmem.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>

#include <linux/mmc/host.h>

#include <linux/io.h>
#include <linux/mmc/sdhci-pltfm.h>

#include "sdhci.h"
#include "sdhci-pltfm.h"

/*****************************************************************************\
 *                                                                           *
 * SDHCI core callbacks                                                      *
 *                                                                           *
\*****************************************************************************/

static struct sdhci_ops sdhci_pltfm_ops = {
};

/*****************************************************************************\
 *                                                                           *
 * Device probing/removal                                                    *
 *                                                                           *
\*****************************************************************************/

static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
{
	const struct platform_device_id *platid = platform_get_device_id(pdev);
	struct sdhci_pltfm_data *pdata;
	struct sdhci_host *host;
	struct sdhci_pltfm_host *pltfm_host;
	struct resource *iomem;
	int ret;

	if (platid && platid->driver_data)
		pdata = (void *)platid->driver_data;
	else
		pdata = pdev->dev.platform_data;

	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!iomem) {
		ret = -ENOMEM;
		goto err;
	}

	if (resource_size(iomem) < 0x100)
		dev_err(&pdev->dev, "Invalid iomem size. You may "
			"experience problems.\n");

	/* Some PCI-based MFD need the parent here */
	if (pdev->dev.parent != &platform_bus)
		host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
	else
		host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));

	if (IS_ERR(host)) {
		ret = PTR_ERR(host);
		goto err;
	}

	pltfm_host = sdhci_priv(host);

	host->hw_name = "platform";
	if (pdata && pdata->ops)
		host->ops = pdata->ops;
	else
		host->ops = &sdhci_pltfm_ops;
	if (pdata)
		host->quirks = pdata->quirks;
	host->irq = platform_get_irq(pdev, 0);

	if (!request_mem_region(iomem->start, resource_size(iomem),
		mmc_hostname(host->mmc))) {
		dev_err(&pdev->dev, "cannot request region\n");
		ret = -EBUSY;
		goto err_request;
	}

	host->ioaddr = ioremap(iomem->start, resource_size(iomem));
	if (!host->ioaddr) {
		dev_err(&pdev->dev, "failed to remap registers\n");
		ret = -ENOMEM;
		goto err_remap;
	}

	if (pdata && pdata->init) {
		ret = pdata->init(host, pdata);
		if (ret)
			goto err_plat_init;
	}

	ret = sdhci_add_host(host);
	if (ret)
		goto err_add_host;

	platform_set_drvdata(pdev, host);

	return 0;

err_add_host:
	if (pdata && pdata->exit)
		pdata->exit(host);
err_plat_init:
	iounmap(host->ioaddr);
err_remap:
	release_mem_region(iomem->start, resource_size(iomem));
err_request:
	sdhci_free_host(host);
err:
	printk(KERN_ERR"Probing of sdhci-pltfm failed: %d\n", ret);
	return ret;
}

static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
{
	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
	struct sdhci_host *host = platform_get_drvdata(pdev);
	struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	int dead;
	u32 scratch;

	dead = 0;
	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
	if (scratch == (u32)-1)
		dead = 1;

	sdhci_remove_host(host, dead);
	if (pdata && pdata->exit)
		pdata->exit(host);
	iounmap(host->ioaddr);
	release_mem_region(iomem->start, resource_size(iomem));
	sdhci_free_host(host);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

static const struct platform_device_id sdhci_pltfm_ids[] = {
	{ "sdhci", },
#ifdef CONFIG_MMC_SDHCI_CNS3XXX
	{ "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata },
#endif
#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
	{ "sdhci-esdhc-imx", (kernel_ulong_t)&sdhci_esdhc_imx_pdata },
#endif
	{ },
};
MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids);

#ifdef CONFIG_PM
static int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state)
{
	struct sdhci_host *host = platform_get_drvdata(dev);

	return sdhci_suspend_host(host, state);
}

static int sdhci_pltfm_resume(struct platform_device *dev)
{
	struct sdhci_host *host = platform_get_drvdata(dev);

	return sdhci_resume_host(host);
}
#else
#define sdhci_pltfm_suspend	NULL
#define sdhci_pltfm_resume	NULL
#endif	/* CONFIG_PM */

static struct platform_driver sdhci_pltfm_driver = {
	.driver = {
		.name	= "sdhci",
		.owner	= THIS_MODULE,
	},
	.probe		= sdhci_pltfm_probe,
	.remove		= __devexit_p(sdhci_pltfm_remove),
	.id_table	= sdhci_pltfm_ids,
	.suspend	= sdhci_pltfm_suspend,
	.resume		= sdhci_pltfm_resume,
};

/*****************************************************************************\
 *                                                                           *
 * Driver init/exit                                                          *
 *                                                                           *
\*****************************************************************************/

static int __init sdhci_drv_init(void)
{
	return platform_driver_register(&sdhci_pltfm_driver);
}

static void __exit sdhci_drv_exit(void)
{
	platform_driver_unregister(&sdhci_pltfm_driver);
}

module_init(sdhci_drv_init);
module_exit(sdhci_drv_exit);

MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
a3456a2d RR	1	/*
	2	* sdhci-pltfm.c Support for SDHCI platform devices
	3	* Copyright (c) 2009 Intel Corporation
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	*/
	18
	19	/* Supports:
	20	* SDHCI platform devices
	21	*
	22	* Inspired by sdhci-pci.c, by Pierre Ossman
	23	*/
	24
	25	#include <linux/delay.h>
	26	#include <linux/highmem.h>
515033f9	27	#include <linux/mod_devicetable.h>
a3456a2d RR	28	#include <linux/platform_device.h>
	29
	30	#include <linux/mmc/host.h>
	31
	32	#include <linux/io.h>
d3b993dc	33	#include <linux/mmc/sdhci-pltfm.h>
a3456a2d RR	34
a3456a2d RR	35	#include "sdhci.h"
515033f9	36	#include "sdhci-pltfm.h"
a3456a2d RR	37
	38	/*****************************************************************************\
	39	* *
	40	* SDHCI core callbacks *
	41	* *
	42	\*****************************************************************************/
	43
	44	static struct sdhci_ops sdhci_pltfm_ops = {
	45	};
	46
	47	/*****************************************************************************\
	48	* *
	49	* Device probing/removal *
	50	* *
	51	\*****************************************************************************/
	52
	53	static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
	54	{
515033f9	55	const struct platform_device_id *platid = platform_get_device_id(pdev);
012994f4	56	struct sdhci_pltfm_data *pdata;
a3456a2d	57	struct sdhci_host *host;
4b711cb1	58	struct sdhci_pltfm_host *pltfm_host;
a3456a2d RR	59	struct resource *iomem;
	60	int ret;
	61
012994f4	62	if (platid && platid->driver_data)
515033f9	63	pdata = (void *)platid->driver_data;
012994f4 WS	64	else
012994f4 WS	65	pdata = pdev->dev.platform_data;
515033f9	66
a3456a2d RR	67	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	68	if (!iomem) {
	69	ret = -ENOMEM;
	70	goto err;
	71	}
	72
e632c45a	73	if (resource_size(iomem) < 0x100)
a3456a2d RR	74	dev_err(&pdev->dev, "Invalid iomem size. You may "
	75	"experience problems.\n");
	76
4b711cb1 WS	77	/* Some PCI-based MFD need the parent here */
	78	if (pdev->dev.parent != &platform_bus)
	79	host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
a3456a2d	80	else
4b711cb1	81	host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));
a3456a2d RR	82
	83	if (IS_ERR(host)) {
	84	ret = PTR_ERR(host);
	85	goto err;
	86	}
	87
4b711cb1 WS	88	pltfm_host = sdhci_priv(host);
4b711cb1 WS	89
a3456a2d	90	host->hw_name = "platform";
a7626b7a AV	91	if (pdata && pdata->ops)
	92	host->ops = pdata->ops;
	93	else
	94	host->ops = &sdhci_pltfm_ops;
	95	if (pdata)
	96	host->quirks = pdata->quirks;
a3456a2d RR	97	host->irq = platform_get_irq(pdev, 0);
	98
	99	if (!request_mem_region(iomem->start, resource_size(iomem),
	100	mmc_hostname(host->mmc))) {
	101	dev_err(&pdev->dev, "cannot request region\n");
	102	ret = -EBUSY;
	103	goto err_request;
	104	}
	105
	106	host->ioaddr = ioremap(iomem->start, resource_size(iomem));
	107	if (!host->ioaddr) {
	108	dev_err(&pdev->dev, "failed to remap registers\n");
	109	ret = -ENOMEM;
	110	goto err_remap;
	111	}
	112
a7626b7a	113	if (pdata && pdata->init) {
012994f4	114	ret = pdata->init(host, pdata);
a7626b7a AV	115	if (ret)
	116	goto err_plat_init;
	117	}
	118
a3456a2d RR	119	ret = sdhci_add_host(host);
	120	if (ret)
	121	goto err_add_host;
	122
	123	platform_set_drvdata(pdev, host);
	124
	125	return 0;
	126
	127	err_add_host:
a7626b7a AV	128	if (pdata && pdata->exit)
	129	pdata->exit(host);
	130	err_plat_init:
a3456a2d RR	131	iounmap(host->ioaddr);
	132	err_remap:
	133	release_mem_region(iomem->start, resource_size(iomem));
	134	err_request:
	135	sdhci_free_host(host);
	136	err:
	137	printk(KERN_ERR"Probing of sdhci-pltfm failed: %d\n", ret);
	138	return ret;
	139	}
	140
	141	static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
	142	{
a7626b7a	143	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
a3456a2d RR	144	struct sdhci_host *host = platform_get_drvdata(pdev);
	145	struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	146	int dead;
	147	u32 scratch;
	148
	149	dead = 0;
	150	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
	151	if (scratch == (u32)-1)
	152	dead = 1;
	153
	154	sdhci_remove_host(host, dead);
a7626b7a AV	155	if (pdata && pdata->exit)
a7626b7a AV	156	pdata->exit(host);
a3456a2d RR	157	iounmap(host->ioaddr);
	158	release_mem_region(iomem->start, resource_size(iomem));
	159	sdhci_free_host(host);
	160	platform_set_drvdata(pdev, NULL);
	161
	162	return 0;
	163	}
	164
515033f9 AV	165	static const struct platform_device_id sdhci_pltfm_ids[] = {
515033f9 AV	166	{ "sdhci", },
20b1597b AV	167	#ifdef CONFIG_MMC_SDHCI_CNS3XXX
20b1597b AV	168	{ "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata },
95f25efe WS	169	#endif
	170	#ifdef CONFIG_MMC_SDHCI_ESDHC_IMX
	171	{ "sdhci-esdhc-imx", (kernel_ulong_t)&sdhci_esdhc_imx_pdata },
20b1597b	172	#endif
515033f9 AV	173	{ },
	174	};
	175	MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids);
	176
be8ae09d GC	177	#ifdef CONFIG_PM
	178	static int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state)
	179	{
	180	struct sdhci_host *host = platform_get_drvdata(dev);
	181
	182	return sdhci_suspend_host(host, state);
	183	}
	184
	185	static int sdhci_pltfm_resume(struct platform_device *dev)
	186	{
	187	struct sdhci_host *host = platform_get_drvdata(dev);
	188
	189	return sdhci_resume_host(host);
	190	}
	191	#else
	192	#define sdhci_pltfm_suspend NULL
	193	#define sdhci_pltfm_resume NULL
	194	#endif /* CONFIG_PM */
	195
a3456a2d RR	196	static struct platform_driver sdhci_pltfm_driver = {
	197	.driver = {
	198	.name = "sdhci",
	199	.owner = THIS_MODULE,
	200	},
	201	.probe = sdhci_pltfm_probe,
	202	.remove = __devexit_p(sdhci_pltfm_remove),
515033f9	203	.id_table = sdhci_pltfm_ids,
be8ae09d GC	204	.suspend = sdhci_pltfm_suspend,
be8ae09d GC	205	.resume = sdhci_pltfm_resume,
a3456a2d RR	206	};
	207
	208	/*****************************************************************************\
	209	* *
	210	* Driver init/exit *
	211	* *
	212	\*****************************************************************************/
	213
	214	static int __init sdhci_drv_init(void)
	215	{
	216	return platform_driver_register(&sdhci_pltfm_driver);
	217	}
	218
	219	static void __exit sdhci_drv_exit(void)
	220	{
	221	platform_driver_unregister(&sdhci_pltfm_driver);
	222	}
	223
	224	module_init(sdhci_drv_init);
	225	module_exit(sdhci_drv_exit);
	226
	227	MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
	228	MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
	229	MODULE_LICENSE("GPL v2");