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/*
* 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/slab.h>
#include <linux/platform_device.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sh_mobile_sdhi.h>
#include <linux/mfd/tmio.h>
#include <linux/sh_dma.h>
#include "tmio_mmc.h"
struct sh_mobile_sdhi {
struct clk *clk;
struct tmio_mmc_data mmc_data;
struct sh_dmae_slave param_tx;
struct sh_dmae_slave param_rx;
struct tmio_mmc_dma dma_priv;
};
static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
{
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
if (p && p->set_pwr)
p->set_pwr(pdev, state);
}
static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
{
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
if (p && p->get_cd)
return p->get_cd(pdev);
else
return -ENOSYS;
}
static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
{
struct sh_mobile_sdhi *priv;
struct tmio_mmc_data *mmc_data;
struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
struct tmio_mmc_host *host;
char clk_name[8];
int ret;
priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
if (priv == NULL) {
dev_err(&pdev->dev, "kzalloc failed\n");
return -ENOMEM;
}
mmc_data = &priv->mmc_data;
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);
goto eclkget;
}
clk_enable(priv->clk);
mmc_data->hclk = clk_get_rate(priv->clk);
mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
mmc_data->get_cd = sh_mobile_sdhi_get_cd;
mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
if (p) {
mmc_data->flags = p->tmio_flags;
mmc_data->ocr_mask = p->tmio_ocr_mask;
mmc_data->capabilities |= p->tmio_caps;
if (p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
priv->param_tx.slave_id = p->dma_slave_tx;
priv->param_rx.slave_id = p->dma_slave_rx;
priv->dma_priv.chan_priv_tx = &priv->param_tx;
priv->dma_priv.chan_priv_rx = &priv->param_rx;
priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
mmc_data->dma = &priv->dma_priv;
}
}
/*
* All SDHI blocks support 2-byte and larger block sizes in 4-bit
* bus width mode.
*/
mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
/*
* All SDHI blocks support SDIO IRQ signalling.
*/
mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
if (ret < 0)
goto eprobe;
pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
(unsigned long)host->ctl, host->irq);
return ret;
eprobe:
clk_disable(priv->clk);
clk_put(priv->clk);
eclkget:
kfree(priv);
return ret;
}
static int sh_mobile_sdhi_remove(struct platform_device *pdev)
{
struct mmc_host *mmc = platform_get_drvdata(pdev);
struct tmio_mmc_host *host = mmc_priv(mmc);
struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
tmio_mmc_host_remove(host);
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");
MODULE_ALIAS("platform:sh_mobile_sdhi");
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