This patch adds Renesas R-Car USB phy driver.
It supports R8A7779 chip at this point.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
---
 drivers/usb/phy/Kconfig    |   11 ++++
 drivers/usb/phy/Makefile   |    1 +
 drivers/usb/phy/rcar-phy.c |  137 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 149 insertions(+)
 create mode 100644 drivers/usb/phy/rcar-phy.c

diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 2838adb..f55b6f6 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -23,3 +23,14 @@ config MV_U3D_PHY
        help
          Enable this to support Marvell USB 3.0 phy controller for Marvell
          SoC.
+
+config USB_RCAR_PHY
+       tristate "Renesas R-Car USB phy support"
+       depends on (USB || USB_GADGET) && ARCH_R8A7779
+       help
+         Say Y here to add support for the Renesas R-Car USB phy driver.
+         This chip is typically used as USB phy for USB host, gadget.
+         This driver supports: R8A7779
+
+         To compile this driver as a module, choose M here: the
+         module will be called rcar-phy.
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index cf38f08..9af83f0 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -6,3 +6,4 @@ ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG
 
 obj-$(CONFIG_USB_ISP1301)              += isp1301.o
 obj-$(CONFIG_MV_U3D_PHY)               += mv_u3d_phy.o
+obj-$(CONFIG_USB_RCAR_PHY)             += rcar-phy.o
diff --git a/drivers/usb/phy/rcar-phy.c b/drivers/usb/phy/rcar-phy.c
new file mode 100644
index 0000000..deec078
--- /dev/null
+++ b/drivers/usb/phy/rcar-phy.c
@@ -0,0 +1,137 @@
+/*
+ * Renesas R-Car USB phy driver
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto...@renesas.com>
+ *
+ * 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.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+
+/* USBH common register */
+#define USBPCTRL0      0x0800
+#define USBPCTRL1      0x0804
+#define USBST          0x0808
+#define USBEH0         0x080C
+#define USBOH0         0x081C
+#define USBCTL0                0x0858
+#define EIIBC1         0x0094
+#define EIIBC2         0x009C
+
+#ifdef CONFIG_ARCH_SUPPORTS_BIG_ENDIAN
+# define PHY_ENDIAN "BIG"
+# define PHY_NO_SWAP 0x00000003
+#else
+# define PHY_ENDIAN "LITTLE"
+# define PHY_NO_SWAP 0x00000000
+#endif
+
+/*
+ * USB initial/install operation.
+ *
+ * This function setup USB phy.
+ * The used value and setting order came from
+ * [USB :: Initial setting] on datasheet.
+ */
+static int rcar_phy_probe(struct platform_device *pdev)
+{
+       struct resource *res0, *res1;
+       void __iomem *reg0, *reg1;
+       int i, ret = 0;
+       u32 val;
+
+       res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+       if (!res0 || !res1) {
+               dev_err(&pdev->dev, "Not enough platform resources\n");
+               return -ENODEV;
+       }
+
+       reg0 = ioremap_nocache(res0->start, resource_size(res0));
+       reg1 = ioremap_nocache(res1->start, resource_size(res1));
+       if (!reg0 || !reg1) {
+               dev_err(&pdev->dev, "ioremap error.\n");
+               ret = -ENOMEM;
+               goto end;
+       }
+
+       /*----------------------------------------*
+        * USB phy start-up
+        *----------------------------------------*/
+
+       /* (1) USB-PHY standby release */
+       iowrite32(0x00000001, (reg0 + USBPCTRL1));
+
+       /* (2) start USB-PHY internal PLL */
+       iowrite32(0x00000003, (reg0 + USBPCTRL1));
+
+       /* (3) USB module status check */
+       for (i = 0; i < 1024; i++) {
+               udelay(10);
+               val = ioread32(reg0 + USBST);
+               if (0xc0000000 == val)
+                       goto usb_module_is_working;
+       }
+       dev_err(&pdev->dev, "USB module not ready\n");
+       ret = -EIO;
+       goto end;
+
+usb_module_is_working:
+       /* (4) USB-PHY reset clear */
+       iowrite32(0x00000007, (reg0 + USBPCTRL1));
+
+       /* set platform specific port settings */
+       iowrite32(0x00000000, (reg0 + USBPCTRL0));
+
+       /*----------------------------------------*
+        * EHCI IP Internal Buffer Setting
+        *----------------------------------------*/
+
+       /* (1) EHCI IP internal buffer setting */
+       iowrite32(0x00ff0040, (reg0 + EIIBC1));
+       iowrite32(0x00ff0040, (reg1 + EIIBC1));
+
+       /* (2) EHCI IP internal buffer enable */
+       iowrite32(0x00000001, (reg0 + EIIBC2));
+       iowrite32(0x00000001, (reg1 + EIIBC2));
+
+       /*----------------------------------------*
+        * Bus alignment settings
+        *----------------------------------------*/
+
+       /* (1) EHCI bus alignment */
+       iowrite32(PHY_NO_SWAP, (reg0 + USBEH0));
+
+       /* (1) OHCI bus alignment */
+       iowrite32(PHY_NO_SWAP, (reg0 + USBOH0));
+
+       dev_info(&pdev->dev,
+                "USB PHY alignment was initialized as %s endian no swap\n",
+               PHY_ENDIAN);
+end:
+       if (reg0)
+               iounmap(reg0);
+       if (reg1)
+               iounmap(reg1);
+
+       return 0;
+}
+
+static struct platform_driver rcar_usb_phy_driver = {
+       .driver         = {
+               .name   = "rcar_usb_phy",
+       },
+       .probe          = rcar_phy_probe,
+};
+
+module_platform_driver(rcar_usb_phy_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Renesas R-Car USB phy");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto...@renesas.com>");
-- 
1.7.9.5

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