273 lines
6.2 KiB
C
273 lines
6.2 KiB
C
|
/*
|
||
|
|
* SAMSUNG EXYNOS USB HOST OHCI Controller
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011 Samsung Electronics Co.Ltd
|
||
|
|
* Author: 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 as published by the
|
||
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
||
|
|
* option) any later version.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/clk.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <mach/ohci.h>
|
||
|
|
#include <plat/usb-phy.h>
|
||
|
|
|
||
|
|
struct exynos_ohci_hcd {
|
||
|
|
struct device *dev;
|
||
|
|
struct usb_hcd *hcd;
|
||
|
|
struct clk *clk;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int ohci_exynos_start(struct usb_hcd *hcd)
|
||
|
|
{
|
||
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ohci_dbg(ohci, "ohci_exynos_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 exynos_ohci_hc_driver = {
|
||
|
|
.description = hcd_name,
|
||
|
|
.product_desc = "EXYNOS OHCI Host Controller",
|
||
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
||
|
|
|
||
|
|
.irq = ohci_irq,
|
||
|
|
.flags = HCD_MEMORY|HCD_USB11,
|
||
|
|
|
||
|
|
.start = ohci_exynos_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 int __devinit exynos_ohci_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct exynos4_ohci_platdata *pdata;
|
||
|
|
struct exynos_ohci_hcd *exynos_ohci;
|
||
|
|
struct usb_hcd *hcd;
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
exynos_ohci = kzalloc(sizeof(struct exynos_ohci_hcd), GFP_KERNEL);
|
||
|
|
if (!exynos_ohci)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
exynos_ohci->dev = &pdev->dev;
|
||
|
|
|
||
|
|
hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev,
|
||
|
|
dev_name(&pdev->dev));
|
||
|
|
if (!hcd) {
|
||
|
|
dev_err(&pdev->dev, "Unable to create HCD\n");
|
||
|
|
err = -ENOMEM;
|
||
|
|
goto fail_hcd;
|
||
|
|
}
|
||
|
|
|
||
|
|
exynos_ohci->hcd = hcd;
|
||
|
|
exynos_ohci->clk = clk_get(&pdev->dev, "usbhost");
|
||
|
|
|
||
|
|
if (IS_ERR(exynos_ohci->clk)) {
|
||
|
|
dev_err(&pdev->dev, "Failed to get usbhost clock\n");
|
||
|
|
err = PTR_ERR(exynos_ohci->clk);
|
||
|
|
goto fail_clk;
|
||
|
|
}
|
||
|
|
|
||
|
|
err = clk_enable(exynos_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_SHARED);
|
||
|
|
if (err) {
|
||
|
|
dev_err(&pdev->dev, "Failed to add USB HCD\n");
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, exynos_ohci);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
fail:
|
||
|
|
iounmap(hcd->regs);
|
||
|
|
fail_io:
|
||
|
|
clk_disable(exynos_ohci->clk);
|
||
|
|
fail_clken:
|
||
|
|
clk_put(exynos_ohci->clk);
|
||
|
|
fail_clk:
|
||
|
|
usb_put_hcd(hcd);
|
||
|
|
fail_hcd:
|
||
|
|
kfree(exynos_ohci);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __devexit exynos_ohci_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
|
||
|
|
struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
|
||
|
|
struct usb_hcd *hcd = exynos_ohci->hcd;
|
||
|
|
|
||
|
|
usb_remove_hcd(hcd);
|
||
|
|
|
||
|
|
if (pdata && pdata->phy_exit)
|
||
|
|
pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
|
||
|
|
|
||
|
|
iounmap(hcd->regs);
|
||
|
|
|
||
|
|
clk_disable(exynos_ohci->clk);
|
||
|
|
clk_put(exynos_ohci->clk);
|
||
|
|
|
||
|
|
usb_put_hcd(hcd);
|
||
|
|
kfree(exynos_ohci);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void exynos_ohci_shutdown(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
|
||
|
|
struct usb_hcd *hcd = exynos_ohci->hcd;
|
||
|
|
|
||
|
|
if (hcd->driver->shutdown)
|
||
|
|
hcd->driver->shutdown(hcd);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM
|
||
|
|
static int exynos_ohci_suspend(struct device *dev)
|
||
|
|
{
|
||
|
|
struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
|
||
|
|
struct usb_hcd *hcd = exynos_ohci->hcd;
|
||
|
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
||
|
|
struct platform_device *pdev = to_platform_device(dev);
|
||
|
|
struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
|
||
|
|
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.
|
||
|
|
*/
|
||
|
|
spin_lock_irqsave(&ohci->lock, flags);
|
||
|
|
if (ohci->rh_state != OHCI_RH_SUSPENDED &&
|
||
|
|
ohci->rh_state != OHCI_RH_HALTED) {
|
||
|
|
rc = -EINVAL;
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
||
|
|
|
||
|
|
if (pdata && pdata->phy_exit)
|
||
|
|
pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
|
||
|
|
fail:
|
||
|
|
spin_unlock_irqrestore(&ohci->lock, flags);
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int exynos_ohci_resume(struct device *dev)
|
||
|
|
{
|
||
|
|
struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
|
||
|
|
struct usb_hcd *hcd = exynos_ohci->hcd;
|
||
|
|
struct platform_device *pdev = to_platform_device(dev);
|
||
|
|
struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
|
||
|
|
|
||
|
|
if (pdata && pdata->phy_init)
|
||
|
|
pdata->phy_init(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 exynos_ohci_suspend NULL
|
||
|
|
#define exynos_ohci_resume NULL
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static const struct dev_pm_ops exynos_ohci_pm_ops = {
|
||
|
|
.suspend = exynos_ohci_suspend,
|
||
|
|
.resume = exynos_ohci_resume,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct platform_driver exynos_ohci_driver = {
|
||
|
|
.probe = exynos_ohci_probe,
|
||
|
|
.remove = __devexit_p(exynos_ohci_remove),
|
||
|
|
.shutdown = exynos_ohci_shutdown,
|
||
|
|
.driver = {
|
||
|
|
.name = "exynos-ohci",
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.pm = &exynos_ohci_pm_ops,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
MODULE_ALIAS("platform:exynos-ohci");
|
||
|
|
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
|