[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/platform_device.h>

#include <linux/mmc/host.h>

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

#include "sdhci.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;
	struct sdhci_host *host;
	struct resource *iomem;
	int ret;

	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");

	if (pdev->dev.parent)
		host = sdhci_alloc_host(pdev->dev.parent, 0);
	else
		host = sdhci_alloc_host(&pdev->dev, 0);

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

	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 struct platform_driver sdhci_pltfm_driver = {
	.driver = {
		.name	= "sdhci",
		.owner	= THIS_MODULE,
	},
	.probe		= sdhci_pltfm_probe,
	.remove		= __devexit_p(sdhci_pltfm_remove),
};

/*****************************************************************************\
 *                                                                           *
 * 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");
MODULE_ALIAS("platform:sdhci");
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>
	27	#include <linux/platform_device.h>
	28
	29	#include <linux/mmc/host.h>
	30
	31	#include <linux/io.h>
a7626b7a	32	#include <linux/sdhci-pltfm.h>
a3456a2d RR	33
	34	#include "sdhci.h"
	35
	36	/*****************************************************************************\
	37	* *
	38	* SDHCI core callbacks *
	39	* *
	40	\*****************************************************************************/
	41
	42	static struct sdhci_ops sdhci_pltfm_ops = {
	43	};
	44
	45	/*****************************************************************************\
	46	* *
	47	* Device probing/removal *
	48	* *
	49	\*****************************************************************************/
	50
	51	static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
	52	{
a7626b7a	53	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
a3456a2d RR	54	struct sdhci_host *host;
	55	struct resource *iomem;
	56	int ret;
	57
a3456a2d RR	58	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	59	if (!iomem) {
	60	ret = -ENOMEM;
	61	goto err;
	62	}
	63
e632c45a	64	if (resource_size(iomem) < 0x100)
a3456a2d RR	65	dev_err(&pdev->dev, "Invalid iomem size. You may "
	66	"experience problems.\n");
	67
	68	if (pdev->dev.parent)
	69	host = sdhci_alloc_host(pdev->dev.parent, 0);
	70	else
	71	host = sdhci_alloc_host(&pdev->dev, 0);
	72
	73	if (IS_ERR(host)) {
	74	ret = PTR_ERR(host);
	75	goto err;
	76	}
	77
	78	host->hw_name = "platform";
a7626b7a AV	79	if (pdata && pdata->ops)
	80	host->ops = pdata->ops;
	81	else
	82	host->ops = &sdhci_pltfm_ops;
	83	if (pdata)
	84	host->quirks = pdata->quirks;
a3456a2d RR	85	host->irq = platform_get_irq(pdev, 0);
	86
	87	if (!request_mem_region(iomem->start, resource_size(iomem),
	88	mmc_hostname(host->mmc))) {
	89	dev_err(&pdev->dev, "cannot request region\n");
	90	ret = -EBUSY;
	91	goto err_request;
	92	}
	93
	94	host->ioaddr = ioremap(iomem->start, resource_size(iomem));
	95	if (!host->ioaddr) {
	96	dev_err(&pdev->dev, "failed to remap registers\n");
	97	ret = -ENOMEM;
	98	goto err_remap;
	99	}
	100
a7626b7a AV	101	if (pdata && pdata->init) {
	102	ret = pdata->init(host);
	103	if (ret)
	104	goto err_plat_init;
	105	}
	106
a3456a2d RR	107	ret = sdhci_add_host(host);
	108	if (ret)
	109	goto err_add_host;
	110
	111	platform_set_drvdata(pdev, host);
	112
	113	return 0;
	114
	115	err_add_host:
a7626b7a AV	116	if (pdata && pdata->exit)
	117	pdata->exit(host);
	118	err_plat_init:
a3456a2d RR	119	iounmap(host->ioaddr);
	120	err_remap:
	121	release_mem_region(iomem->start, resource_size(iomem));
	122	err_request:
	123	sdhci_free_host(host);
	124	err:
	125	printk(KERN_ERR"Probing of sdhci-pltfm failed: %d\n", ret);
	126	return ret;
	127	}
	128
	129	static int __devexit sdhci_pltfm_remove(struct platform_device *pdev)
	130	{
a7626b7a	131	struct sdhci_pltfm_data *pdata = pdev->dev.platform_data;
a3456a2d RR	132	struct sdhci_host *host = platform_get_drvdata(pdev);
	133	struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	134	int dead;
	135	u32 scratch;
	136
	137	dead = 0;
	138	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
	139	if (scratch == (u32)-1)
	140	dead = 1;
	141
	142	sdhci_remove_host(host, dead);
a7626b7a AV	143	if (pdata && pdata->exit)
a7626b7a AV	144	pdata->exit(host);
a3456a2d RR	145	iounmap(host->ioaddr);
	146	release_mem_region(iomem->start, resource_size(iomem));
	147	sdhci_free_host(host);
	148	platform_set_drvdata(pdev, NULL);
	149
	150	return 0;
	151	}
	152
	153	static struct platform_driver sdhci_pltfm_driver = {
	154	.driver = {
	155	.name = "sdhci",
	156	.owner = THIS_MODULE,
	157	},
	158	.probe = sdhci_pltfm_probe,
	159	.remove = __devexit_p(sdhci_pltfm_remove),
	160	};
	161
	162	/*****************************************************************************\
	163	* *
	164	* Driver init/exit *
	165	* *
	166	\*****************************************************************************/
	167
	168	static int __init sdhci_drv_init(void)
	169	{
	170	return platform_driver_register(&sdhci_pltfm_driver);
	171	}
	172
	173	static void __exit sdhci_drv_exit(void)
	174	{
	175	platform_driver_unregister(&sdhci_pltfm_driver);
	176	}
	177
	178	module_init(sdhci_drv_init);
	179	module_exit(sdhci_drv_exit);
	180
	181	MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
	182	MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
	183	MODULE_LICENSE("GPL v2");
	184	MODULE_ALIAS("platform:sdhci");