This patch adds Renesas R-Car USB phy driver.
It supports R8A7779 chip at this point.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
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.gx@xxxxxxxxxxx>
+ *
+ * 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.gx@xxxxxxxxxxx>");
--
1.7.9.5
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