1 files changed, 370 insertions, 0 deletions
diff --git a/target/linux/realtek/files/drivers/usb/host_uWiFi/ohci-at91.c b/target/linux/realtek/files/drivers/usb/host_uWiFi/ohci-at91.c
new file mode 100644
index 000000000..bb5e6f671
--- /dev/null
+++ b/target/linux/realtek/files/drivers/usb/host_uWiFi/ohci-at91.c
@@ -0,0 +1,370 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ *  Copyright (C) 2004 SAN People (Pty) Ltd.
+ *  Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
+ *
+ * AT91 Bus Glue
+ *
+ * Based on fragments of 2.4 driver by Rick Bronson.
+ * Based on ohci-omap.c
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+
+#include <mach/hardware.h>
+#include <asm/gpio.h>
+
+#include <mach/board.h>
+#include <mach/cpu.h>
+
+#ifndef CONFIG_ARCH_AT91
+#error "CONFIG_ARCH_AT91 must be defined."
+#endif
+
+/* interface and function clocks; sometimes also an AHB clock */
+static struct clk *iclk, *fclk, *hclk;
+static int clocked;
+
+extern int usb_disabled(void);
+
+/*-------------------------------------------------------------------------*/
+
+static void at91_start_clock(void)
+{
+	if (cpu_is_at91sam9261())
+		clk_enable(hclk);
+	clk_enable(iclk);
+	clk_enable(fclk);
+	clocked = 1;
+}
+
+static void at91_stop_clock(void)
+{
+	clk_disable(fclk);
+	clk_disable(iclk);
+	if (cpu_is_at91sam9261())
+		clk_disable(hclk);
+	clocked = 0;
+}
+
+static void at91_start_hc(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(pdev);
+	struct ohci_regs __iomem *regs = hcd->regs;
+
+	dev_dbg(&pdev->dev, "start\n");
+
+	/*
+	 * Start the USB clocks.
+	 */
+	at91_start_clock();
+
+	/*
+	 * The USB host controller must remain in reset.
+	 */
+	writel(0, &regs->control);
+}
+
+static void at91_stop_hc(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(pdev);
+	struct ohci_regs __iomem *regs = hcd->regs;
+
+	dev_dbg(&pdev->dev, "stop\n");
+
+	/*
+	 * Put the USB host controller into reset.
+	 */
+	writel(0, &regs->control);
+
+	/*
+	 * Stop the USB clocks.
+	 */
+	at91_stop_clock();
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static void usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+
+/**
+ * usb_hcd_at91_probe - initialize AT91-based HCDs
+ * Context: !in_interrupt()
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it
+ * through the hotplug entry's driver_data.
+ */
+static int usb_hcd_at91_probe(const struct hc_driver *driver,
+			struct platform_device *pdev)
+{
+	int retval;
+	struct usb_hcd *hcd = NULL;
+
+	if (pdev->num_resources != 2) {
+		pr_debug("hcd probe: invalid num_resources");
+		return -ENODEV;
+	}
+
+	if ((pdev->resource[0].flags != IORESOURCE_MEM)
+			|| (pdev->resource[1].flags != IORESOURCE_IRQ)) {
+		pr_debug("hcd probe: invalid resource type\n");
+		return -ENODEV;
+	}
+
+	hcd = usb_create_hcd(driver, &pdev->dev, "at91");
+	if (!hcd)
+		return -ENOMEM;
+	hcd->rsrc_start = pdev->resource[0].start;
+	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
+
+	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+		pr_debug("request_mem_region failed\n");
+		retval = -EBUSY;
+		goto err1;
+	}
+
+	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+	if (!hcd->regs) {
+		pr_debug("ioremap failed\n");
+		retval = -EIO;
+		goto err2;
+	}
+
+	iclk = clk_get(&pdev->dev, "ohci_clk");
+	fclk = clk_get(&pdev->dev, "uhpck");
+	if (cpu_is_at91sam9261())
+		hclk = clk_get(&pdev->dev, "hck0");
+
+	at91_start_hc(pdev);
+	ohci_hcd_init(hcd_to_ohci(hcd));
+
+	retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
+	if (retval == 0)
+		return retval;
+
+	/* Error handling */
+	at91_stop_hc(pdev);
+
+	if (cpu_is_at91sam9261())
+		clk_put(hclk);
+	clk_put(fclk);
+	clk_put(iclk);
+
+	iounmap(hcd->regs);
+
+ err2:
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+
+ err1:
+	usb_put_hcd(hcd);
+	return retval;
+}
+
+
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_at91_remove - shutdown processing for AT91-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_at91_probe(), first invoking
+ * the HCD's stop() method.  It is always called from a thread
+ * context, "rmmod" or something similar.
+ *
+ */
+static void usb_hcd_at91_remove(struct usb_hcd *hcd,
+				struct platform_device *pdev)
+{
+	usb_remove_hcd(hcd);
+	at91_stop_hc(pdev);
+	iounmap(hcd->regs);
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	usb_put_hcd(hcd);
+
+	if (cpu_is_at91sam9261())
+		clk_put(hclk);
+	clk_put(fclk);
+	clk_put(iclk);
+	fclk = iclk = hclk = NULL;
+
+	dev_set_drvdata(&pdev->dev, NULL);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __devinit
+ohci_at91_start (struct usb_hcd *hcd)
+{
+	struct at91_usbh_data	*board = hcd->self.controller->platform_data;
+	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
+	int			ret;
+
+	if ((ret = ohci_init(ohci)) < 0)
+		return ret;
+
+	ohci->num_ports = board->ports;
+
+	if ((ret = ohci_run(ohci)) < 0) {
+		err("can't start %s", hcd->self.bus_name);
+		ohci_stop(hcd);
+		return ret;
+	}
+	return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct hc_driver ohci_at91_hc_driver = {
+	.description =		hcd_name,
+	.product_desc =		"AT91 OHCI",
+	.hcd_priv_size =	sizeof(struct ohci_hcd),
+
+	/*
+	 * generic hardware linkage
+	 */
+	.irq =			ohci_irq,
+	.flags =		HCD_USB11 | HCD_MEMORY,
+
+	/*
+	 * basic lifecycle operations
+	 */
+	.start =		ohci_at91_start,
+	.stop =			ohci_stop,
+	.shutdown =		ohci_shutdown,
+
+	/*
+	 * managing i/o requests and associated device resources
+	 */
+	.urb_enqueue =		ohci_urb_enqueue,
+	.urb_dequeue =		ohci_urb_dequeue,
+	.endpoint_disable =	ohci_endpoint_disable,
+
+	/*
+	 * scheduling support
+	 */
+	.get_frame_number =	ohci_get_frame,
+
+	/*
+	 * root hub support
+	 */
+	.hub_status_data =	ohci_hub_status_data,
+	.hub_control =		ohci_hub_control,
+#ifdef CONFIG_PM
+	.bus_suspend =		ohci_bus_suspend,
+	.bus_resume =		ohci_bus_resume,
+#endif
+	.start_port_reset =	ohci_start_port_reset,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int ohci_hcd_at91_drv_probe(struct platform_device *pdev)
+{
+	struct at91_usbh_data	*pdata = pdev->dev.platform_data;
+	int			i;
+
+	if (pdata) {
+		/* REVISIT make the driver support per-port power switching,
+		 * and also overcurrent detection.  Here we assume the ports
+		 * are always powered while this driver is active, and use
+		 * active-low power switches.
+		 */
+		for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
+			if (pdata->vbus_pin[i] <= 0)
+				continue;
+			gpio_request(pdata->vbus_pin[i], "ohci_vbus");
+			gpio_direction_output(pdata->vbus_pin[i], 0);
+		}
+	}
+
+	device_init_wakeup(&pdev->dev, 1);
+	return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev);
+}
+
+static int ohci_hcd_at91_drv_remove(struct platform_device *pdev)
+{
+	struct at91_usbh_data	*pdata = pdev->dev.platform_data;
+	int			i;
+
+	if (pdata) {
+		for (i = 0; i < ARRAY_SIZE(pdata->vbus_pin); i++) {
+			if (pdata->vbus_pin[i] <= 0)
+				continue;
+			gpio_direction_output(pdata->vbus_pin[i], 1);
+			gpio_free(pdata->vbus_pin[i]);
+		}
+	}
+
+	device_init_wakeup(&pdev->dev, 0);
+	usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int
+ohci_hcd_at91_drv_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+	struct usb_hcd	*hcd = platform_get_drvdata(pdev);
+	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
+
+	if (device_may_wakeup(&pdev->dev))
+		enable_irq_wake(hcd->irq);
+
+	/*
+	 * The integrated transceivers seem unable to notice disconnect,
+	 * reconnect, or wakeup without the 48 MHz clock active.  so for
+	 * correctness, always discard connection state (using reset).
+	 *
+	 * REVISIT: some boards will be able to turn VBUS off...
+	 */
+	if (at91_suspend_entering_slow_clock()) {
+		ohci_usb_reset (ohci);
+		at91_stop_clock();
+	}
+
+	return 0;
+}
+
+static int ohci_hcd_at91_drv_resume(struct platform_device *pdev)
+{
+	struct usb_hcd	*hcd = platform_get_drvdata(pdev);
+
+	if (device_may_wakeup(&pdev->dev))
+		disable_irq_wake(hcd->irq);
+
+	if (!clocked)
+		at91_start_clock();
+
+	ohci_finish_controller_resume(hcd);
+	return 0;
+}
+#else
+#define ohci_hcd_at91_drv_suspend NULL
+#define ohci_hcd_at91_drv_resume  NULL
+#endif
+
+MODULE_ALIAS("platform:at91_ohci");
+
+static struct platform_driver ohci_hcd_at91_driver = {
+	.probe		= ohci_hcd_at91_drv_probe,
+	.remove		= ohci_hcd_at91_drv_remove,
+	.shutdown	= usb_hcd_platform_shutdown,
+	.suspend	= ohci_hcd_at91_drv_suspend,
+	.resume		= ohci_hcd_at91_drv_resume,
+	.driver		= {
+		.name	= "at91_ohci",
+		.owner	= THIS_MODULE,
+	},
+};