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/*
* Universal Flash Storage Host controller driver
*
* This code is based on drivers/scsi/ufs/ufshcd.c
* Copyright (C) 2011-2012 Samsung India Software Operations
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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.
*
* NO WARRANTY
* THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
* LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
* solely responsible for determining the appropriateness of using and
* distributing the Program and assumes all risks associated with its
* exercise of rights under this Agreement, including but not limited to
* the risks and costs of program errors, damage to or loss of data,
* programs or equipment, and unavailability or interruption of operations.
* DISCLAIMER OF LIABILITY
* NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
* HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <scsi/scsi_host.h>
#include "ufs.h"
#include "ufshci.h"
/**
* ufshcd_pltfmset_dma_mask - Set dma mask based on the controller
* addressing capability
* @ihba: pointer to host platform data
*
* Returns 0 for success, non-zero for failure
*/
static int ufshcd_pltfm_set_dma_mask(struct platform_device *pdev)
{
int err;
u64 dma_mask;
dma_mask = DMA_BIT_MASK(64);
err = dma_set_coherent_mask(&pdev->dev, dma_mask);
if (err) {
dma_mask = DMA_BIT_MASK(32);
err = dma_set_coherent_mask(&pdev->dev, dma_mask);
}
return err;
}
static int __devinit ufshcd_pltfm_probe(struct platform_device *pdev)
{
struct ufs_hba *uninitialized_var(hba);
struct resource *regs;
int err, irq;
void __iomem *mmio_base;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs)
return -ENXIO;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
mmio_base = ioremap(regs->start, resource_size(regs));
if (!mmio_base)
return -ENOMEM;
err = ufshcd_pltfm_set_dma_mask(pdev);
if (err) {
dev_err(&pdev->dev, "set dma mask failed\n");
goto err_iounmap;
}
err = ufshcd_drv_init(&hba, &pdev->dev, irq, mmio_base);
if (err)
goto err_iounmap;
platform_set_drvdata(pdev, hba);
/* Initialization routine */
err = ufshcd_initialize_hba(hba);
if (err) {
dev_err(&pdev->dev, "Initialization failed\n");
goto err_remove;
}
return err;
err_remove:
ufshcd_drv_exit(hba);
err_iounmap:
iounmap(hba->mmio_base);
return err;
}
static int __devexit ufshcd_pltfm_remove(struct platform_device *pdev)
{
struct ufs_hba *hba = platform_get_drvdata(pdev);
ufshcd_drv_exit(hba);
iounmap(hba->mmio_base);
platform_set_drvdata(pdev, NULL);
return 0;
}
#ifdef CONFIG_PM
static int ufshcd_pltfm_suspend(struct device *dev)
{
int ret;
struct ufs_hba *hba = dev_get_drvdata(dev);
ret = ufshcd_suspend(hba);
return ret;
}
static int ufshcd_pltfm_resume(struct device *dev)
{
int ret;
struct ufs_hba *hba = dev_get_drvdata(dev);
ret = ufshcd_resume(hba);
return ret;
}
#else
#define ufshcd_pltfm_suspend NULL
#define ufshcd_pltfm_resume NULL
#endif /* CONFIG_PM */
static SIMPLE_DEV_PM_OPS(ufshcd_pltfm_pmops,
ufshcd_pltfm_suspend,
ufshcd_pltfm_resume);
static struct platform_driver ufshcd_pltfm_driver = {
.probe = ufshcd_pltfm_probe,
.remove = __devexit_p(ufshcd_pltfm_remove),
.driver = {
.name = "ufshcd-pltfm",
.pm = &ufshcd_pltfm_pmops,
},
};
module_platform_driver(ufshcd_pltfm_driver);
MODULE_DESCRIPTION("UFS Host Controller platform Interface driver");
MODULE_AUTHOR("Girish K S <ks.giri@samsung.com>");
MODULE_LICENSE("GPL");
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