Initial import

1 files changed, 148 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
new file mode 100644
index 000000000..e42a29e8e
--- /dev/null
+++ b/drivers/usb/host/ehci-w90x900.c
@@ -0,0 +1,148 @@
+/*
+ * 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/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ehci.h"
+
+/* enable phy0 and phy1 for w90p910 */
+#define	ENPHY		(0x01<<8)
+#define PHY0_CTR	(0xA4)
+#define PHY1_CTR	(0xA8)
+
+#define DRIVER_DESC "EHCI w90x900 driver"
+
+static const char hcd_name[] = "ehci-w90x900 ";
+
+static struct hc_driver __read_mostly ehci_w90x900_hc_driver;
+
+static int 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;
+
+	hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI");
+	if (!hcd) {
+		retval = -ENOMEM;
+		goto err1;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(hcd->regs)) {
+		retval = PTR_ERR(hcd->regs);
+		goto err2;
+	}
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = resource_size(res);
+
+	ehci = hcd_to_ehci(hcd);
+	ehci->caps = hcd->regs;
+	ehci->regs = hcd->regs +
+		HC_LENGTH(ehci, 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);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		retval = irq;
+		goto err2;
+	}
+
+	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (retval != 0)
+		goto err2;
+
+	device_wakeup_enable(hcd->self.controller);
+	return retval;
+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);
+	usb_put_hcd(hcd);
+}
+
+static int ehci_w90x900_probe(struct platform_device *pdev)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
+}
+
+static int 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 = ehci_w90x900_remove,
+	.driver = {
+		.name = "w90x900-ehci",
+	},
+};
+
+static int __init ehci_w90X900_init(void)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+	ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
+	return platform_driver_register(&ehci_hcd_w90x900_driver);
+}
+module_init(ehci_w90X900_init);
+
+static void __exit ehci_w90X900_cleanup(void)
+{
+	platform_driver_unregister(&ehci_hcd_w90x900_driver);
+}
+module_exit(ehci_w90X900_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
+MODULE_ALIAS("platform:w90p910-ehci");
+MODULE_LICENSE("GPL v2");