157 lines
3.6 KiB
C
157 lines
3.6 KiB
C
/*
|
|
* SuperH Mobile SDHI
|
|
*
|
|
* Copyright (C) 2009 Magnus Damm
|
|
*
|
|
* 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.
|
|
*
|
|
* Based on "Compaq ASIC3 support":
|
|
*
|
|
* Copyright 2001 Compaq Computer Corporation.
|
|
* Copyright 2004-2005 Phil Blundell
|
|
* Copyright 2007-2008 OpenedHand Ltd.
|
|
*
|
|
* Authors: Phil Blundell <pb@handhelds.org>,
|
|
* Samuel Ortiz <sameo@openedhand.com>
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mmc/host.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/tmio.h>
|
|
#include <linux/mfd/sh_mobile_sdhi.h>
|
|
|
|
struct sh_mobile_sdhi {
|
|
struct clk *clk;
|
|
struct tmio_mmc_data mmc_data;
|
|
struct mfd_cell cell_mmc;
|
|
};
|
|
|
|
static struct resource sh_mobile_sdhi_resources[] = {
|
|
{
|
|
.start = 0x000,
|
|
.end = 0x1ff,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
{
|
|
.start = 0,
|
|
.end = 0,
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
static struct mfd_cell sh_mobile_sdhi_cell = {
|
|
.name = "tmio-mmc",
|
|
.num_resources = ARRAY_SIZE(sh_mobile_sdhi_resources),
|
|
.resources = sh_mobile_sdhi_resources,
|
|
};
|
|
|
|
static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(tmio->dev.parent);
|
|
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
|
|
|
|
if (p && p->set_pwr)
|
|
p->set_pwr(pdev, state);
|
|
}
|
|
|
|
static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
|
|
{
|
|
struct sh_mobile_sdhi *priv;
|
|
struct resource *mem;
|
|
char clk_name[8];
|
|
int ret, irq;
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!mem)
|
|
dev_err(&pdev->dev, "missing MEM resource\n");
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
dev_err(&pdev->dev, "missing IRQ resource\n");
|
|
|
|
if (!mem || (irq < 0))
|
|
return -EINVAL;
|
|
|
|
priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
|
|
if (priv == NULL) {
|
|
dev_err(&pdev->dev, "kzalloc failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
|
|
priv->clk = clk_get(&pdev->dev, clk_name);
|
|
if (IS_ERR(priv->clk)) {
|
|
dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
|
|
ret = PTR_ERR(priv->clk);
|
|
kfree(priv);
|
|
return ret;
|
|
}
|
|
|
|
clk_enable(priv->clk);
|
|
|
|
priv->mmc_data.hclk = clk_get_rate(priv->clk);
|
|
priv->mmc_data.set_pwr = sh_mobile_sdhi_set_pwr;
|
|
priv->mmc_data.capabilities = MMC_CAP_MMC_HIGHSPEED;
|
|
|
|
memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
|
|
priv->cell_mmc.driver_data = &priv->mmc_data;
|
|
priv->cell_mmc.platform_data = &priv->cell_mmc;
|
|
priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
|
|
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
ret = mfd_add_devices(&pdev->dev, pdev->id,
|
|
&priv->cell_mmc, 1, mem, irq);
|
|
if (ret) {
|
|
clk_disable(priv->clk);
|
|
clk_put(priv->clk);
|
|
kfree(priv);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sh_mobile_sdhi_remove(struct platform_device *pdev)
|
|
{
|
|
struct sh_mobile_sdhi *priv = platform_get_drvdata(pdev);
|
|
|
|
mfd_remove_devices(&pdev->dev);
|
|
clk_disable(priv->clk);
|
|
clk_put(priv->clk);
|
|
kfree(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver sh_mobile_sdhi_driver = {
|
|
.driver = {
|
|
.name = "sh_mobile_sdhi",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = sh_mobile_sdhi_probe,
|
|
.remove = __devexit_p(sh_mobile_sdhi_remove),
|
|
};
|
|
|
|
static int __init sh_mobile_sdhi_init(void)
|
|
{
|
|
return platform_driver_register(&sh_mobile_sdhi_driver);
|
|
}
|
|
|
|
static void __exit sh_mobile_sdhi_exit(void)
|
|
{
|
|
platform_driver_unregister(&sh_mobile_sdhi_driver);
|
|
}
|
|
|
|
module_init(sh_mobile_sdhi_init);
|
|
module_exit(sh_mobile_sdhi_exit);
|
|
|
|
MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
|
|
MODULE_AUTHOR("Magnus Damm");
|
|
MODULE_LICENSE("GPL v2");
|