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

#include "sdhci-pltfm.h"

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;

	ret = readl(host->ioaddr + reg);

	switch (reg) {
	case SDHCI_CAPABILITIES:
		/* Mask the support for 3.0V */
		ret &= ~SDHCI_CAN_VDD_300;
		break;
	}
	return ret;
}

static const struct sdhci_ops sdhci_dove_ops = {
	.read_w	= sdhci_dove_readw,
	.read_l	= sdhci_dove_readl,
	.set_clock = sdhci_set_clock,
	.set_bus_width = sdhci_set_bus_width,
	.reset = sdhci_reset,
	.set_uhs_signaling = sdhci_set_uhs_signaling,
};

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

	host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
	if (IS_ERR(host))
		return PTR_ERR(host);

	pltfm_host = sdhci_priv(host);
	pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);

	if (!IS_ERR(pltfm_host->clk))
		clk_prepare_enable(pltfm_host->clk);

	ret = mmc_of_parse(host->mmc);
	if (ret)
		goto err_sdhci_add;

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

	return 0;

err_sdhci_add:
	clk_disable_unprepare(pltfm_host->clk);
	sdhci_pltfm_free(pdev);
	return ret;
}

static const struct of_device_id sdhci_dove_of_match_table[] = {
	{ .compatible = "marvell,dove-sdhci", },
	{}
};
MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);

static struct platform_driver sdhci_dove_driver = {
	.driver		= {
		.name	= "sdhci-dove",
		.pm	= SDHCI_PLTFM_PMOPS,
		.of_match_table = sdhci_dove_of_match_table,
	},
	.probe		= sdhci_dove_probe,
	.remove		= sdhci_pltfm_unregister,
};

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
30b87c60 SH	22	#include <linux/clk.h>
30b87c60 SH	23	#include <linux/err.h>
f8ec589b	24	#include <linux/io.h>
985b1aa0	25	#include <linux/mmc/host.h>
f8ec589b	26	#include <linux/module.h>
4ee7ed0d	27	#include <linux/of.h>
985b1aa0	28
985b1aa0 MR	29	#include "sdhci-pltfm.h"
	30
	31	static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
	32	{
	33	u16 ret;
	34
	35	switch (reg) {
	36	case SDHCI_HOST_VERSION:
	37	case SDHCI_SLOT_INT_STATUS:
	38	/* those registers don't exist */
	39	return 0;
	40	default:
	41	ret = readw(host->ioaddr + reg);
	42	}
	43	return ret;
	44	}
	45
	46	static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
	47	{
	48	u32 ret;
	49
f8ec589b RK	50	ret = readl(host->ioaddr + reg);
f8ec589b RK	51
985b1aa0 MR	52	switch (reg) {
985b1aa0 MR	53	case SDHCI_CAPABILITIES:
985b1aa0 MR	54	/* Mask the support for 3.0V */
	55	ret &= ~SDHCI_CAN_VDD_300;
	56	break;
985b1aa0 MR	57	}
	58	return ret;
	59	}
	60
c915568d	61	static const struct sdhci_ops sdhci_dove_ops = {
985b1aa0 MR	62	.read_w = sdhci_dove_readw,
985b1aa0 MR	63	.read_l = sdhci_dove_readl,
1771059c	64	.set_clock = sdhci_set_clock,
2317f56c	65	.set_bus_width = sdhci_set_bus_width,
03231f9b	66	.reset = sdhci_reset,
96d7b78c	67	.set_uhs_signaling = sdhci_set_uhs_signaling,
985b1aa0 MR	68	};
985b1aa0 MR	69
1db5eebf	70	static const 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	78
c3be1efd	79	static int sdhci_dove_probe(struct platform_device *pdev)
85d6509d	80	{
30b87c60 SH	81	struct sdhci_host *host;
30b87c60 SH	82	struct sdhci_pltfm_host *pltfm_host;
30b87c60 SH	83	int ret;
30b87c60 SH	84
0e748234	85	host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
c5ee2490 SH	86	if (IS_ERR(host))
c5ee2490 SH	87	return PTR_ERR(host);
ee3298a2	88
30b87c60	89	pltfm_host = sdhci_priv(host);
35daeede	90	pltfm_host->clk = devm_clk_get(&pdev->dev, NULL);
30b87c60	91
35daeede KH	92	if (!IS_ERR(pltfm_host->clk))
35daeede KH	93	clk_prepare_enable(pltfm_host->clk);
c430689f	94
c5ee2490 SH	95	ret = mmc_of_parse(host->mmc);
	96	if (ret)
	97	goto err_sdhci_add;
c430689f RK	98
	99	ret = sdhci_add_host(host);
	100	if (ret)
	101	goto err_sdhci_add;
	102
30b87c60 SH	103	return 0;
30b87c60 SH	104
c430689f	105	err_sdhci_add:
35daeede	106	clk_disable_unprepare(pltfm_host->clk);
c430689f	107	sdhci_pltfm_free(pdev);
30b87c60	108	return ret;
85d6509d SG	109	}
85d6509d SG	110
498d83e7	111	static const struct of_device_id sdhci_dove_of_match_table[] = {
4ee7ed0d SH	112	{ .compatible = "marvell,dove-sdhci", },
	113	{}
	114	};
	115	MODULE_DEVICE_TABLE(of, sdhci_dove_of_match_table);
	116
85d6509d SG	117	static struct platform_driver sdhci_dove_driver = {
	118	.driver = {
	119	.name = "sdhci-dove",
29495aa0	120	.pm = SDHCI_PLTFM_PMOPS,
5941fd07	121	.of_match_table = sdhci_dove_of_match_table,
85d6509d SG	122	},
85d6509d SG	123	.probe = sdhci_dove_probe,
caebcae9	124	.remove = sdhci_pltfm_unregister,
85d6509d SG	125	};
85d6509d SG	126
d1f81a64	127	module_platform_driver(sdhci_dove_driver);
85d6509d SG	128
	129	MODULE_DESCRIPTION("SDHCI driver for Dove");
	130	MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
	131	"Mike Rapoport <mike@compulab.co.il>");
	132	MODULE_LICENSE("GPL v2");