[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/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)
{
	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
	const struct platform_device_id *platid = platform_get_device_id(pdev);
	struct sdhci_host *host;
	struct sdhci_pltfm_host *pltfm_host;
	struct resource *iomem;
	int ret;

	if (!pdata && platid && platid->driver_data)
		pdata = (void *)platid->driver_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);
		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
	{ },
};
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>
a7626b7a	33	#include <linux/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	{
a7626b7a	55	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
515033f9	56	const struct platform_device_id *platid = platform_get_device_id(pdev);
a3456a2d	57	struct sdhci_host *host;
4b711cb1	58	struct sdhci_pltfm_host *pltfm_host;
a3456a2d RR	59	struct resource *iomem;
	60	int ret;
	61
515033f9 AV	62	if (!pdata && platid && platid->driver_data)
	63	pdata = (void *)platid->driver_data;
	64
a3456a2d RR	65	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	66	if (!iomem) {
	67	ret = -ENOMEM;
	68	goto err;
	69	}
	70
e632c45a	71	if (resource_size(iomem) < 0x100)
a3456a2d RR	72	dev_err(&pdev->dev, "Invalid iomem size. You may "
	73	"experience problems.\n");
	74
4b711cb1 WS	75	/* Some PCI-based MFD need the parent here */
	76	if (pdev->dev.parent != &platform_bus)
	77	host = sdhci_alloc_host(pdev->dev.parent, sizeof(*pltfm_host));
a3456a2d	78	else
4b711cb1	79	host = sdhci_alloc_host(&pdev->dev, sizeof(*pltfm_host));
a3456a2d RR	80
	81	if (IS_ERR(host)) {
	82	ret = PTR_ERR(host);
	83	goto err;
	84	}
	85
4b711cb1 WS	86	pltfm_host = sdhci_priv(host);
4b711cb1 WS	87
a3456a2d	88	host->hw_name = "platform";
a7626b7a AV	89	if (pdata && pdata->ops)
	90	host->ops = pdata->ops;
	91	else
	92	host->ops = &sdhci_pltfm_ops;
	93	if (pdata)
	94	host->quirks = pdata->quirks;
a3456a2d RR	95	host->irq = platform_get_irq(pdev, 0);
	96
	97	if (!request_mem_region(iomem->start, resource_size(iomem),
	98	mmc_hostname(host->mmc))) {
	99	dev_err(&pdev->dev, "cannot request region\n");
	100	ret = -EBUSY;
	101	goto err_request;
	102	}
	103
	104	host->ioaddr = ioremap(iomem->start, resource_size(iomem));
	105	if (!host->ioaddr) {
	106	dev_err(&pdev->dev, "failed to remap registers\n");
	107	ret = -ENOMEM;
	108	goto err_remap;
	109	}
	110
a7626b7a AV	111	if (pdata && pdata->init) {
	112	ret = pdata->init(host);
	113	if (ret)
	114	goto err_plat_init;
	115	}
	116
a3456a2d RR	117	ret = sdhci_add_host(host);
	118	if (ret)
	119	goto err_add_host;
	120
	121	platform_set_drvdata(pdev, host);
	122
	123	return 0;
	124
	125	err_add_host:
a7626b7a AV	126	if (pdata && pdata->exit)
	127	pdata->exit(host);
	128	err_plat_init:
a3456a2d RR	129	iounmap(host->ioaddr);
	130	err_remap:
	131	release_mem_region(iomem->start, resource_size(iomem));
	132	err_request:
	133	sdhci_free_host(host);
	134	err:
	135	printk(KERN_ERR"Probing of sdhci-pltfm failed: %d\n", ret);
	136	return ret;
	137	}
	138
	139	static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
	140	{
a7626b7a	141	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
a3456a2d RR	142	struct sdhci_host *host = platform_get_drvdata(pdev);
	143	struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	144	int dead;
	145	u32 scratch;
	146
	147	dead = 0;
	148	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
	149	if (scratch == (u32)-1)
	150	dead = 1;
	151
	152	sdhci_remove_host(host, dead);
a7626b7a AV	153	if (pdata && pdata->exit)
a7626b7a AV	154	pdata->exit(host);
a3456a2d RR	155	iounmap(host->ioaddr);
	156	release_mem_region(iomem->start, resource_size(iomem));
	157	sdhci_free_host(host);
	158	platform_set_drvdata(pdev, NULL);
	159
	160	return 0;
	161	}
	162
515033f9 AV	163	static const struct platform_device_id sdhci_pltfm_ids[] = {
515033f9 AV	164	{ "sdhci", },
20b1597b AV	165	#ifdef CONFIG_MMC_SDHCI_CNS3XXX
	166	{ "sdhci-cns3xxx", (kernel_ulong_t)&sdhci_cns3xxx_pdata },
	167	#endif
515033f9 AV	168	{ },
	169	};
	170	MODULE_DEVICE_TABLE(platform, sdhci_pltfm_ids);
	171
be8ae09d GC	172	#ifdef CONFIG_PM
	173	static int sdhci_pltfm_suspend(struct platform_device *dev, pm_message_t state)
	174	{
	175	struct sdhci_host *host = platform_get_drvdata(dev);
	176
	177	return sdhci_suspend_host(host, state);
	178	}
	179
	180	static int sdhci_pltfm_resume(struct platform_device *dev)
	181	{
	182	struct sdhci_host *host = platform_get_drvdata(dev);
	183
	184	return sdhci_resume_host(host);
	185	}
	186	#else
	187	#define sdhci_pltfm_suspend NULL
	188	#define sdhci_pltfm_resume NULL
	189	#endif /* CONFIG_PM */
	190
a3456a2d RR	191	static struct platform_driver sdhci_pltfm_driver = {
	192	.driver = {
	193	.name = "sdhci",
	194	.owner = THIS_MODULE,
	195	},
	196	.probe = sdhci_pltfm_probe,
	197	.remove = __devexit_p(sdhci_pltfm_remove),
515033f9	198	.id_table = sdhci_pltfm_ids,
be8ae09d GC	199	.suspend = sdhci_pltfm_suspend,
be8ae09d GC	200	.resume = sdhci_pltfm_resume,
a3456a2d RR	201	};
	202
	203	/*****************************************************************************\
	204	* *
	205	* Driver init/exit *
	206	* *
	207	\*****************************************************************************/
	208
	209	static int __init sdhci_drv_init(void)
	210	{
	211	return platform_driver_register(&sdhci_pltfm_driver);
	212	}
	213
	214	static void __exit sdhci_drv_exit(void)
	215	{
	216	platform_driver_unregister(&sdhci_pltfm_driver);
	217	}
	218
	219	module_init(sdhci_drv_init);
	220	module_exit(sdhci_drv_exit);
	221
	222	MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
	223	MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
	224	MODULE_LICENSE("GPL v2");