USB: Add nuvoton Ehci driver for w90p910 platform

Add ehci support for w90p910 platform.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 194 insertions, 0 deletions

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index dcd49f1e96d0..93cee3e5ca58 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -39,6 +39,7 @@ config USB_ARCH_HAS_OHCI
         default y if ARCH_AT91
         default y if ARCH_PNX4008 && I2C
         default y if MFD_TC6393XB
+        default y if ARCH_W90X900
         # PPC:
         default y if STB03xxx
         default y if PPC_MPC52xx
@@ -58,6 +59,7 @@ config USB_ARCH_HAS_EHCI
         default y if PPC_83xx
         default y if SOC_AU1200
         default y if ARCH_IXP4XX
+        default y if ARCH_W90X900
         default PCI
 
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index f21ca7d27a43..41b8d7de2e07 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -113,6 +113,12 @@ config USB_EHCI_HCD_PPC_OF
           Enables support for the USB controller present on the PowerPC
           OpenFirmware platform bus.
 
+config USB_W90X900_EHCI
+        bool "W90X900(W90P910) EHCI support"
+        depends on USB_EHCI_HCD && ARCH_W90X900
+        ---help---
+                Enables support for the W90X900 USB controller
+
 config USB_OXU210HP_HCD
         tristate "OXU210HP HCD support"
         depends on USB
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 11c627ce6022..54715b875759 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1117,6 +1117,11 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER         ixp4xx_ehci_driver
 #endif
 
+#ifdef CONFIG_USB_W90X900_EHCI
+#include "ehci-w90x900.c"
+#define PLATFORM_DRIVER         ehci_hcd_w90x900_driver
+#endif
+
 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER)
 #error "missing bus glue for ehci-hcd"
diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
new file mode 100644
index 000000000000..cfa21ea20f82
--- /dev/null
+++ b/drivers/usb/host/ehci-w90x900.c
@@ -0,0 +1,181 @@
+/*
+ * linux/driver/usb/host/ehci-w90x900.c
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * 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;version 2 of the License.
+ *
+ */
+
+#include <linux/platform_device.h>
+
+/*ebable phy0 and phy1 for w90p910*/
+#define ENPHY           (0x01<<8)
+#define PHY0_CTR        (0xA4)
+#define PHY1_CTR        (0xA8)
+
+static int __devinit usb_w90x900_probe(const struct hc_driver *driver,
+                      struct platform_device *pdev)
+{
+        struct usb_hcd *hcd;
+        struct ehci_hcd *ehci;
+        struct resource *res;
+        int retval = 0, irq;
+        unsigned long val;
+
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                retval = -ENXIO;
+                goto err1;
+        }
+
+        hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI");
+        if (!hcd) {
+                retval = -ENOMEM;
+                goto err1;
+        }
+
+        hcd->rsrc_start = res->start;
+        hcd->rsrc_len = res->end - res->start + 1;
+
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+                retval = -EBUSY;
+                goto err2;
+        }
+
+        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+        if (hcd->regs == NULL) {
+                retval = -EFAULT;
+                goto err3;
+        }
+
+        ehci = hcd_to_ehci(hcd);
+        ehci->caps = hcd->regs;
+        ehci->regs = hcd->regs +
+                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+
+        /* enable PHY 0,1,the regs only apply to w90p910
+        *  0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
+        *  w90p910 IC relative to ehci->regs.
+        */
+        val = __raw_readl(ehci->regs+PHY0_CTR);
+        val |= ENPHY;
+        __raw_writel(val, ehci->regs+PHY0_CTR);
+
+        val = __raw_readl(ehci->regs+PHY1_CTR);
+        val |= ENPHY;
+        __raw_writel(val, ehci->regs+PHY1_CTR);
+
+        ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+        ehci->sbrn = 0x20;
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0)
+                goto err4;
+
+        retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+        if (retval != 0)
+                goto err4;
+
+        ehci_writel(ehci, 1, &ehci->regs->configured_flag);
+
+        return retval;
+err4:
+        iounmap(hcd->regs);
+err3:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err2:
+        usb_put_hcd(hcd);
+err1:
+        return retval;
+}
+
+static
+void usb_w90x900_remove(struct usb_hcd *hcd, struct platform_device *pdev)
+{
+        usb_remove_hcd(hcd);
+        iounmap(hcd->regs);
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+}
+
+static const struct hc_driver ehci_w90x900_hc_driver = {
+        .description = hcd_name,
+        .product_desc = "Nuvoton w90x900 EHCI Host Controller",
+        .hcd_priv_size = sizeof(struct ehci_hcd),
+
+        /*
+         * generic hardware linkage
+         */
+        .irq = ehci_irq,
+        .flags = HCD_USB2|HCD_MEMORY,
+
+        /*
+         * basic lifecycle operations
+         */
+        .reset = ehci_init,
+        .start = ehci_run,
+
+        .stop = ehci_stop,
+        .shutdown = ehci_shutdown,
+
+        /*
+         * managing i/o requests and associated device resources
+         */
+        .urb_enqueue = ehci_urb_enqueue,
+        .urb_dequeue = ehci_urb_dequeue,
+        .endpoint_disable = ehci_endpoint_disable,
+
+        /*
+         * scheduling support
+         */
+        .get_frame_number = ehci_get_frame,
+
+        /*
+         * root hub support
+         */
+        .hub_status_data = ehci_hub_status_data,
+        .hub_control = ehci_hub_control,
+#ifdef  CONFIG_PM
+        .bus_suspend = ehci_bus_suspend,
+        .bus_resume = ehci_bus_resume,
+#endif
+        .relinquish_port        = ehci_relinquish_port,
+        .port_handed_over       = ehci_port_handed_over,
+};
+
+static int __devinit ehci_w90x900_probe(struct platform_device *pdev)
+{
+        if (usb_disabled())
+                return -ENODEV;
+
+        return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
+}
+
+static int __devexit ehci_w90x900_remove(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+        usb_w90x900_remove(hcd, pdev);
+
+        return 0;
+}
+
+static struct platform_driver ehci_hcd_w90x900_driver = {
+        .probe  = ehci_w90x900_probe,
+        .remove = __devexit_p(ehci_w90x900_remove),
+        .driver = {
+                .name = "w90x900-ehci",
+                .owner = THIS_MODULE,
+        },
+};
+
+MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
+MODULE_DESCRIPTION("w90p910 usb ehci driver!");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:w90p910-ehci");