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;
+
+ return 0;
+}
+
+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;
+
+ 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
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