On Mon, May 21, 2012 at 12:01 PM, Girish K S
<girish.shivananjappa@xxxxxxxxxx> wrote:
> This patch adds platform support for ufs host controller
> The SoC's that use non-pci probing should use this option.
>
> Signed-off-by: Girish K S <girish.shivananjappa@xxxxxxxxxx>
> ---
> drivers/scsi/ufs/Kconfig | 13 +++
> drivers/scsi/ufs/Makefile | 1 +
> drivers/scsi/ufs/ufshcd-pltfm.c | 180 +++++++++++++++++++++++++++++++++++++++
> 3 files changed, 194 insertions(+), 0 deletions(-)
> create mode 100644 drivers/scsi/ufs/ufshcd-pltfm.c
>
> diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig
> index 2a70972..dae5428 100644
> --- a/drivers/scsi/ufs/Kconfig
> +++ b/drivers/scsi/ufs/Kconfig
> @@ -60,3 +60,16 @@ config SCSI_UFSHCD_PCI
> If you have a controller with this interface, say Y or M here.
>
> If unsure, say N.
> +
> +config SCSI_UFSHCD_PLTFM
> + tristate "Universal Flash Storage host support as platform device"
> + depends on SCSI_UFSHCD
> + help
> + This selects the common helper functions support for Host Controller
> + Interface based platform driver. Please select this option if the IP
> + is present as a platform device. This is the common interface for the
> + UFS Host Controller IP.
> +
> + If you have a controller with this interface, say Y or M here.
> +
> + If unsure, say N.
> diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
> index 9eda0df..fc56471 100644
> --- a/drivers/scsi/ufs/Makefile
> +++ b/drivers/scsi/ufs/Makefile
> @@ -1,3 +1,4 @@
> # UFSHCD makefile
> obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o
> obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o
> +obj-$(CONFIG_SCSI_UFSHCD_PLTFM) += ufshcd-pltfm.o
> diff --git a/drivers/scsi/ufs/ufshcd-pltfm.c b/drivers/scsi/ufs/ufshcd-pltfm.c
> new file mode 100644
> index 0000000..7558210
> --- /dev/null
> +++ b/drivers/scsi/ufs/ufshcd-pltfm.c
> @@ -0,0 +1,180 @@
> +/*
> + * 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(&hba->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);
> + if (ret)
> + return ret;
The above 2 lines are redundant...
> +
> + return 0;
.. if you simply do a "return ret" here...
> +}
> +
> +static int ufshcd_pltfm_resume(struct device *dev)
> +{
> + int ret;
> + struct ufs_hba *hba = dev_get_drvdata(dev);
> +
> + ret = ufshcd_resume(hba);
> + if (ret)
> + return ret;
.. ditto
> +
> + return 0;
> +}
> +#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@xxxxxxxxxxx>");
> +MODULE_LICENSE("GPL");
> --
> 1.7.4.1
>
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
