[deliverable/linux.git] / drivers / mmc / host / sdhci-dove.c

/*
 * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
 *
 * Author: Saeed Bishara <saeed@marvell.com>
 *	   Mike Rapoport <mike@compulab.co.il>
 * Based on sdhci-cns3xxx.c
 *
 * 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.
 */

#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mmc/host.h>

#include "sdhci-pltfm.h"

struct sdhci_dove_priv {
	struct clk *clk;
};

static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
{
	u16 ret;

	switch (reg) {
	case SDHCI_HOST_VERSION:
	case SDHCI_SLOT_INT_STATUS:
		/* those registers don't exist */
		return 0;
	default:
		ret = readw(host->ioaddr + reg);
	}
	return ret;
}

static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
{
	u32 ret;

	switch (reg) {
	case SDHCI_CAPABILITIES:
		ret = readl(host->ioaddr + reg);
		/* Mask the support for 3.0V */
		ret &= ~SDHCI_CAN_VDD_300;
		break;
	default:
		ret = readl(host->ioaddr + reg);
	}
	return ret;
}

static struct sdhci_ops sdhci_dove_ops = {
	.read_w	= sdhci_dove_readw,
	.read_l	= sdhci_dove_readl,
};

static struct sdhci_pltfm_data sdhci_dove_pdata = {
	.ops	= &sdhci_dove_ops,
	.quirks	= SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
		  SDHCI_QUIRK_NO_BUSY_IRQ |
		  SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
		  SDHCI_QUIRK_FORCE_DMA |
		  SDHCI_QUIRK_NO_HISPD_BIT,
};

static int __devinit sdhci_dove_probe(struct platform_device *pdev)
{
	struct sdhci_host *host;
	struct sdhci_pltfm_host *pltfm_host;
	struct sdhci_dove_priv *priv;
	int ret;

	ret = sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
	if (ret)
		goto sdhci_dove_register_fail;

	priv = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_dove_priv),
			    GFP_KERNEL);
	if (!priv) {
		dev_err(&pdev->dev, "unable to allocate private data");
		ret = -ENOMEM;
		goto sdhci_dove_allocate_fail;
	}

	host = platform_get_drvdata(pdev);
	pltfm_host = sdhci_priv(host);
	pltfm_host->priv = priv;

	priv->clk = clk_get(&pdev->dev, NULL);
	if (!IS_ERR(priv->clk))
		clk_prepare_enable(priv->clk);
	return 0;

sdhci_dove_allocate_fail:
	sdhci_pltfm_unregister(pdev);
sdhci_dove_register_fail:
	return ret;
}

static int __devexit sdhci_dove_remove(struct platform_device *pdev)
{
	struct sdhci_host *host = platform_get_drvdata(pdev);
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_dove_priv *priv = pltfm_host->priv;

	if (priv->clk) {
		if (!IS_ERR(priv->clk)) {
			clk_disable_unprepare(priv->clk);
			clk_put(priv->clk);
		}
		devm_kfree(&pdev->dev, priv->clk);
	}
	return sdhci_pltfm_unregister(pdev);
}

static struct platform_driver sdhci_dove_driver = {
	.driver		= {
		.name	= "sdhci-dove",
		.owner	= THIS_MODULE,
		.pm	= SDHCI_PLTFM_PMOPS,
	},
	.probe		= sdhci_dove_probe,
	.remove		= __devexit_p(sdhci_dove_remove),
};

module_platform_driver(sdhci_dove_driver);

MODULE_DESCRIPTION("SDHCI driver for Dove");
MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
	      "Mike Rapoport <mike@compulab.co.il>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
985b1aa0 MR	1	/*
	2	* sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
	3	*
	4	* Author: Saeed Bishara <saeed@marvell.com>
	5	* Mike Rapoport <mike@compulab.co.il>
	6	* Based on sdhci-cns3xxx.c
	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	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/io.h>
30b87c60 SH	23	#include <linux/clk.h>
30b87c60 SH	24	#include <linux/err.h>
8c2fc8e4	25	#include <linux/module.h>
985b1aa0 MR	26	#include <linux/mmc/host.h>
985b1aa0 MR	27
985b1aa0 MR	28	#include "sdhci-pltfm.h"
985b1aa0 MR	29
30b87c60 SH	30	struct sdhci_dove_priv {
	31	struct clk *clk;
	32	};
	33
985b1aa0 MR	34	static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
	35	{
	36	u16 ret;
	37
	38	switch (reg) {
	39	case SDHCI_HOST_VERSION:
	40	case SDHCI_SLOT_INT_STATUS:
	41	/* those registers don't exist */
	42	return 0;
	43	default:
	44	ret = readw(host->ioaddr + reg);
	45	}
	46	return ret;
	47	}
	48
	49	static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
	50	{
	51	u32 ret;
	52
	53	switch (reg) {
	54	case SDHCI_CAPABILITIES:
	55	ret = readl(host->ioaddr + reg);
	56	/* Mask the support for 3.0V */
	57	ret &= ~SDHCI_CAN_VDD_300;
	58	break;
	59	default:
	60	ret = readl(host->ioaddr + reg);
	61	}
	62	return ret;
	63	}
	64
	65	static struct sdhci_ops sdhci_dove_ops = {
	66	.read_w = sdhci_dove_readw,
	67	.read_l = sdhci_dove_readl,
	68	};
	69
85d6509d	70	static struct sdhci_pltfm_data sdhci_dove_pdata = {
985b1aa0 MR	71	.ops = &sdhci_dove_ops,
	72	.quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER \|
	73	SDHCI_QUIRK_NO_BUSY_IRQ \|
	74	SDHCI_QUIRK_BROKEN_TIMEOUT_VAL \|
a9ca1d54 SH	75	SDHCI_QUIRK_FORCE_DMA \|
a9ca1d54 SH	76	SDHCI_QUIRK_NO_HISPD_BIT,
985b1aa0	77	};
85d6509d SG	78
	79	static int __devinit sdhci_dove_probe(struct platform_device *pdev)
	80	{
30b87c60 SH	81	struct sdhci_host *host;
	82	struct sdhci_pltfm_host *pltfm_host;
	83	struct sdhci_dove_priv *priv;
	84	int ret;
	85
	86	ret = sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
	87	if (ret)
	88	goto sdhci_dove_register_fail;
	89
	90	priv = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_dove_priv),
	91	GFP_KERNEL);
	92	if (!priv) {
	93	dev_err(&pdev->dev, "unable to allocate private data");
	94	ret = -ENOMEM;
	95	goto sdhci_dove_allocate_fail;
	96	}
	97
	98	host = platform_get_drvdata(pdev);
	99	pltfm_host = sdhci_priv(host);
	100	pltfm_host->priv = priv;
	101
	102	priv->clk = clk_get(&pdev->dev, NULL);
	103	if (!IS_ERR(priv->clk))
	104	clk_prepare_enable(priv->clk);
	105	return 0;
	106
	107	sdhci_dove_allocate_fail:
	108	sdhci_pltfm_unregister(pdev);
	109	sdhci_dove_register_fail:
	110	return ret;
85d6509d SG	111	}
	112
	113	static int __devexit sdhci_dove_remove(struct platform_device *pdev)
	114	{
30b87c60 SH	115	struct sdhci_host *host = platform_get_drvdata(pdev);
	116	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	117	struct sdhci_dove_priv *priv = pltfm_host->priv;
	118
	119	if (priv->clk) {
	120	if (!IS_ERR(priv->clk)) {
	121	clk_disable_unprepare(priv->clk);
	122	clk_put(priv->clk);
	123	}
	124	devm_kfree(&pdev->dev, priv->clk);
	125	}
85d6509d SG	126	return sdhci_pltfm_unregister(pdev);
	127	}
	128
	129	static struct platform_driver sdhci_dove_driver = {
	130	.driver = {
	131	.name = "sdhci-dove",
	132	.owner = THIS_MODULE,
29495aa0	133	.pm = SDHCI_PLTFM_PMOPS,
85d6509d SG	134	},
	135	.probe = sdhci_dove_probe,
	136	.remove = __devexit_p(sdhci_dove_remove),
85d6509d SG	137	};
85d6509d SG	138
d1f81a64	139	module_platform_driver(sdhci_dove_driver);
85d6509d SG	140
	141	MODULE_DESCRIPTION("SDHCI driver for Dove");
	142	MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
	143	"Mike Rapoport <mike@compulab.co.il>");
	144	MODULE_LICENSE("GPL v2");