samsung update 1

1 files changed, 485 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-s5p.c b/drivers/usb/host/ohci-s5p.c
new file mode 100644
index 0000000..fce68ef
--- /dev/null
+++ b/drivers/usb/host/ohci-s5p.c
@@ -0,0 +1,485 @@
+/* ohci-s5p.c - Driver for USB HOST on Samsung S5P platform device
+ *
+ * Bus Glue for SAMSUNG S5P USB HOST OHCI Controller
+ *
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
+ * (C) Copyright 2002 Hewlett-Packard Company
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ *
+ * Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
+ * Modified for SAMSUNG s5p OHCI by Jingoo Han <jg1.han@samsung.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/platform_device.h>
+#include <linux/clk.h>
+
+#include <plat/ehci.h>
+#include <plat/usb-phy.h>
+
+#include <mach/board_rev.h>
+
+struct s5p_ohci_hcd {
+	struct device *dev;
+	struct usb_hcd *hcd;
+	struct clk *clk;
+	int power_on;
+};
+
+#ifdef CONFIG_USB_EXYNOS_SWITCH
+int s5p_ohci_port_power_off(struct platform_device *pdev)
+{
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
+	(void)ohci_readl(ohci, &ohci->regs->intrdisable);
+
+	ohci_writel (ohci, RH_HS_LPS, &ohci->regs->roothub.status);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(s5p_ohci_port_power_off);
+
+int s5p_ohci_port_power_on(struct platform_device *pdev)
+{
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+
+	ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(s5p_ohci_port_power_on);
+#endif
+
+#ifdef CONFIG_PM
+static int ohci_hcd_s5p_drv_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ohci_platdata *pdata = pdev->dev.platform_data;
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+	unsigned long flags;
+	int rc = 0;
+
+	/* Root hub was already suspended. Disable irq emission and
+	 * mark HW unaccessible, bail out if RH has been resumed. Use
+	 * the spinlock to properly synchronize with possible pending
+	 * RH suspend or resume activity.
+	 *
+	 * This is still racy as hcd->state is manipulated outside of
+	 * any locks =P But that will be a different fix.
+	 */
+	spin_lock_irqsave(&ohci->lock, flags);
+	if (hcd->state != HC_STATE_SUSPENDED && hcd->state != HC_STATE_HALT) {
+		spin_unlock_irqrestore(&ohci->lock, flags);
+		return -EINVAL;
+	}
+
+	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+	spin_unlock_irqrestore(&ohci->lock, flags);
+
+	if (pdata && pdata->phy_exit)
+		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
+
+	clk_disable(s5p_ohci->clk);
+
+	return rc;
+}
+
+static int ohci_hcd_s5p_drv_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ohci_platdata *pdata = pdev->dev.platform_data;
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+	int rc = 0;
+
+	clk_enable(s5p_ohci->clk);
+	pm_runtime_resume(&pdev->dev);
+
+	if (pdata && pdata->phy_init)
+		pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+
+	/* if OHCI was off, hcd was removed */
+	if (!s5p_ohci->power_on) {
+		dev_info(dev, "Nothing to do for the device (power off)\n");
+		return 0;
+	}
+
+	/* Mark hardware accessible again as we are out of D3 state by now */
+	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+	ohci_finish_controller_resume(hcd);
+
+	return rc;
+}
+
+#else
+#define ohci_hcd_s5p_drv_suspend	NULL
+#define ohci_hcd_s5p_drv_resume		NULL
+#endif
+
+#ifdef CONFIG_USB_SUSPEND
+static int ohci_hcd_s5p_drv_runtime_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ohci_platdata *pdata = pdev->dev.platform_data;
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+	unsigned long flags;
+	int rc = 0;
+
+	/* Root hub was already suspended. Disable irq emission and
+	 * mark HW unaccessible, bail out if RH has been resumed. Use
+	 * the spinlock to properly synchronize with possible pending
+	 * RH suspend or resume activity.
+	 *
+	 * This is still racy as hcd->state is manipulated outside of
+	 * any locks =P But that will be a different fix.
+	 */
+	spin_lock_irqsave(&ohci->lock, flags);
+	if (hcd->state != HC_STATE_SUSPENDED && hcd->state != HC_STATE_HALT) {
+		spin_unlock_irqrestore(&ohci->lock, flags);
+		err("Not ready %s", hcd->self.bus_name);
+		return rc;
+	}
+
+	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
+	(void)ohci_readl(ohci, &ohci->regs->intrdisable);
+
+	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+	spin_unlock_irqrestore(&ohci->lock, flags);
+
+	if (pdata->phy_suspend)
+		pdata->phy_suspend(pdev, S5P_USB_PHY_HOST);
+
+	return rc;
+}
+
+static int ohci_hcd_s5p_drv_runtime_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ohci_platdata *pdata = pdev->dev.platform_data;
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+
+	if (dev->power.is_suspended)
+		return 0;
+
+	if (pdata->phy_resume)
+		pdata->phy_resume(pdev, S5P_USB_PHY_HOST);
+	/* Mark hardware accessible again as we are out of D3 state by now */
+	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+	ohci_finish_controller_resume(hcd);
+
+	return 0;
+}
+#else
+#define ohci_hcd_s5p_drv_runtime_suspend	NULL
+#define ohci_hcd_s5p_drv_runtime_resume		NULL
+#endif
+
+static int ohci_s5p_start(struct usb_hcd *hcd)
+{
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+	int ret;
+
+	ohci_dbg(ohci, "ohci_s5p_start, ohci:%p", ohci);
+
+	ret = ohci_init(ohci);
+	if (ret < 0)
+		return ret;
+
+	ret = ohci_run(ohci);
+	if (ret < 0) {
+		err("can't start %s", hcd->self.bus_name);
+		ohci_stop(hcd);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct hc_driver ohci_s5p_hc_driver = {
+	.description		= hcd_name,
+	.product_desc		= "s5p OHCI",
+	.hcd_priv_size		= sizeof(struct ohci_hcd),
+
+	.irq			= ohci_irq,
+	.flags			= HCD_MEMORY|HCD_USB11,
+
+	.start			= ohci_s5p_start,
+	.stop			= ohci_stop,
+	.shutdown		= ohci_shutdown,
+
+	.get_frame_number	= ohci_get_frame,
+
+	.urb_enqueue		= ohci_urb_enqueue,
+	.urb_dequeue		= ohci_urb_dequeue,
+	.endpoint_disable	= ohci_endpoint_disable,
+
+	.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 ssize_t show_ohci_power(struct device *dev,
+			       struct device_attribute *attr,
+			       char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+
+	return sprintf(buf, "OHCI Power %s\n", (s5p_ohci->power_on) ? "on" : "off");
+}
+
+static ssize_t store_ohci_power(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct s5p_ohci_platdata *pdata = pdev->dev.platform_data;
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+	int power_on;
+	int irq;
+	int retval;
+
+	if (sscanf(buf, "%d", &power_on) != 1)
+		return -EINVAL;
+
+	device_lock(dev);
+	if (!power_on && s5p_ohci->power_on) {
+		printk(KERN_DEBUG "%s: OHCI turns off\n", __func__);
+		pm_runtime_forbid(dev);
+		s5p_ohci->power_on = 0;
+		usb_remove_hcd(hcd);
+
+		if (pdata && pdata->phy_exit)
+			pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
+	} else if (power_on) {
+		printk(KERN_DEBUG "%s: OHCI turns on\n", __func__);
+		if (s5p_ohci->power_on) {
+			pm_runtime_forbid(dev);
+			usb_remove_hcd(hcd);
+		} else {
+			if (pdata && pdata->phy_init)
+				pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+		}
+
+		irq = platform_get_irq(pdev, 0);
+		retval = usb_add_hcd(hcd, irq,
+				IRQF_DISABLED | IRQF_SHARED);
+		if (retval < 0) {
+			dev_err(dev, "Power On Fail\n");
+			goto exit;
+		}
+
+		s5p_ohci->power_on = 1;
+		pm_runtime_allow(dev);
+	}
+exit:
+	device_unlock(dev);
+	return count;
+}
+static DEVICE_ATTR(ohci_power, 0664, show_ohci_power, store_ohci_power);
+
+static inline int create_ohci_sys_file(struct ohci_hcd *ohci)
+{
+	return device_create_file(ohci_to_hcd(ohci)->self.controller,
+			&dev_attr_ohci_power);
+}
+
+static inline void remove_ohci_sys_file(struct ohci_hcd *ohci)
+{
+	device_remove_file(ohci_to_hcd(ohci)->self.controller,
+			&dev_attr_ohci_power);
+}
+static int __devinit ohci_hcd_s5p_drv_probe(struct platform_device *pdev)
+{
+	struct s5p_ohci_platdata *pdata;
+	struct s5p_ohci_hcd *s5p_ohci;
+	struct usb_hcd  *hcd = NULL;
+	struct ohci_hcd *ohci;
+	struct resource *res;
+	int irq;
+	int err;
+
+	pdata = pdev->dev.platform_data;
+	if (!pdata) {
+		dev_err(&pdev->dev, "No platform data defined\n");
+		return -EINVAL;
+	}
+
+	s5p_ohci = kzalloc(sizeof(struct s5p_ohci_hcd), GFP_KERNEL);
+	if (!s5p_ohci)
+		return -ENOMEM;
+
+	s5p_ohci->dev = &pdev->dev;
+
+	hcd = usb_create_hcd(&ohci_s5p_hc_driver, &pdev->dev,
+					dev_name(&pdev->dev));
+	if (!hcd) {
+		dev_err(&pdev->dev, "Unable to create HCD\n");
+		err = -ENOMEM;
+		goto fail_hcd;
+	}
+
+	s5p_ohci->hcd = hcd;
+	s5p_ohci->clk = clk_get(&pdev->dev, "usbhost");
+
+	if (IS_ERR(s5p_ohci->clk)) {
+		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
+		err = PTR_ERR(s5p_ohci->clk);
+		goto fail_clk;
+	}
+
+	err = clk_enable(s5p_ohci->clk);
+	if (err)
+		goto fail_clken;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "Failed to get I/O memory\n");
+		err = -ENXIO;
+		goto fail_io;
+	}
+
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = resource_size(res);
+	hcd->regs = ioremap(res->start, resource_size(res));
+	if (!hcd->regs) {
+		dev_err(&pdev->dev, "Failed to remap I/O memory\n");
+		err = -ENOMEM;
+		goto fail_io;
+	}
+
+	irq = platform_get_irq(pdev, 0);
+	if (!irq) {
+		dev_err(&pdev->dev, "Failed to get IRQ\n");
+		err = -ENODEV;
+		goto fail;
+	}
+
+	if (pdata->phy_init)
+		pdata->phy_init(pdev, S5P_USB_PHY_HOST);
+
+	ohci = hcd_to_ohci(hcd);
+	ohci_hcd_init(ohci);
+
+	err = usb_add_hcd(hcd, irq,
+				IRQF_DISABLED | IRQF_SHARED);
+
+	if (err) {
+		dev_err(&pdev->dev, "Failed to add USB HCD\n");
+		goto fail;
+	}
+
+	platform_set_drvdata(pdev, s5p_ohci);
+
+	create_ohci_sys_file(ohci);
+	s5p_ohci->power_on = 1;
+
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+
+fail:
+	iounmap(hcd->regs);
+fail_io:
+	clk_disable(s5p_ohci->clk);
+fail_clken:
+	clk_put(s5p_ohci->clk);
+fail_clk:
+	usb_put_hcd(hcd);
+fail_hcd:
+	kfree(s5p_ohci);
+	return err;
+}
+
+static int __devexit ohci_hcd_s5p_drv_remove(struct platform_device *pdev)
+{
+	struct s5p_ohci_platdata *pdata = pdev->dev.platform_data;
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+
+	if (pdata && pdata->phy_resume)
+		pdata->phy_resume(pdev, S5P_USB_PHY_HOST);
+
+	usb_remove_hcd(hcd);
+
+	s5p_ohci->power_on = 0;
+	remove_ohci_sys_file(hcd_to_ohci(hcd));
+
+	if (pdata && pdata->phy_exit)
+		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
+
+	iounmap(hcd->regs);
+
+	clk_disable(s5p_ohci->clk);
+	clk_put(s5p_ohci->clk);
+
+	usb_put_hcd(hcd);
+	kfree(s5p_ohci);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static void ohci_hcd_s5p_drv_shutdown(struct platform_device *pdev)
+{
+	struct s5p_ohci_platdata *pdata = pdev->dev.platform_data;
+	struct s5p_ohci_hcd *s5p_ohci = platform_get_drvdata(pdev);
+	struct usb_hcd *hcd = s5p_ohci->hcd;
+
+	if (!s5p_ohci->power_on)
+		return;
+
+	if (pdata && pdata->phy_resume)
+		pdata->phy_resume(pdev, S5P_USB_PHY_HOST);
+
+	if (hcd->driver->shutdown)
+		hcd->driver->shutdown(hcd);
+}
+
+static const struct dev_pm_ops ohci_s5p_pm_ops = {
+	.suspend		= ohci_hcd_s5p_drv_suspend,
+	.resume			= ohci_hcd_s5p_drv_resume,
+#ifdef CONFIG_HIBERNATION
+	.freeze			= ohci_hcd_s5p_drv_suspend,
+	.thaw			= ohci_hcd_s5p_drv_resume,
+	.restore		= ohci_hcd_s5p_drv_resume,
+#endif
+	.runtime_suspend	= ohci_hcd_s5p_drv_runtime_suspend,
+	.runtime_resume		= ohci_hcd_s5p_drv_runtime_resume,
+};
+
+static struct platform_driver ohci_hcd_s5p_driver = {
+	.probe		= ohci_hcd_s5p_drv_probe,
+	.remove		= __devexit_p(ohci_hcd_s5p_drv_remove),
+	.shutdown	= ohci_hcd_s5p_drv_shutdown,
+	.driver = {
+		.name	= "s5p-ohci",
+		.owner	= THIS_MODULE,
+		.pm	= &ohci_s5p_pm_ops,
+	}
+};
+
+MODULE_ALIAS("platform:s5p-ohci");