298 строки
7.1 KiB
C
298 строки
7.1 KiB
C
/*
|
|
* SAMSUNG S5P USB HOST EHCI Controller
|
|
*
|
|
* Copyright (C) 2011 Samsung Electronics Co.Ltd
|
|
* Author: Jingoo Han <jg1.han@samsung.com>
|
|
* Author: Joonyoung Shim <jy0922.shim@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/regs-pmu.h>
|
|
#include <plat/cpu.h>
|
|
#include <plat/ehci.h>
|
|
#include <plat/usb-phy.h>
|
|
|
|
struct s5p_ehci_hcd {
|
|
struct device *dev;
|
|
struct usb_hcd *hcd;
|
|
struct clk *clk;
|
|
};
|
|
|
|
static const struct hc_driver s5p_ehci_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "S5P EHCI Host Controller",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
|
|
.reset = ehci_init,
|
|
.start = ehci_run,
|
|
.stop = ehci_stop,
|
|
.shutdown = ehci_shutdown,
|
|
|
|
.get_frame_number = ehci_get_frame,
|
|
|
|
.urb_enqueue = ehci_urb_enqueue,
|
|
.urb_dequeue = ehci_urb_dequeue,
|
|
.endpoint_disable = ehci_endpoint_disable,
|
|
.endpoint_reset = ehci_endpoint_reset,
|
|
|
|
.hub_status_data = ehci_hub_status_data,
|
|
.hub_control = ehci_hub_control,
|
|
.bus_suspend = ehci_bus_suspend,
|
|
.bus_resume = ehci_bus_resume,
|
|
|
|
.relinquish_port = ehci_relinquish_port,
|
|
.port_handed_over = ehci_port_handed_over,
|
|
|
|
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
|
|
};
|
|
|
|
static int __devinit s5p_ehci_probe(struct platform_device *pdev)
|
|
{
|
|
struct s5p_ehci_platdata *pdata;
|
|
struct s5p_ehci_hcd *s5p_ehci;
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci;
|
|
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_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
|
|
if (!s5p_ehci)
|
|
return -ENOMEM;
|
|
|
|
s5p_ehci->dev = &pdev->dev;
|
|
|
|
hcd = usb_create_hcd(&s5p_ehci_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_ehci->clk = clk_get(&pdev->dev, "usbhost");
|
|
|
|
if (IS_ERR(s5p_ehci->clk)) {
|
|
dev_err(&pdev->dev, "Failed to get usbhost clock\n");
|
|
err = PTR_ERR(s5p_ehci->clk);
|
|
goto fail_clk;
|
|
}
|
|
|
|
err = clk_enable(s5p_ehci->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);
|
|
|
|
ehci = hcd_to_ehci(hcd);
|
|
ehci->caps = hcd->regs;
|
|
ehci->regs = hcd->regs +
|
|
HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
|
|
|
|
dbg_hcs_params(ehci, "reset");
|
|
dbg_hcc_params(ehci, "reset");
|
|
|
|
/* cache this readonly data; minimize chip reads */
|
|
ehci->hcs_params = readl(&ehci->caps->hcs_params);
|
|
|
|
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_ehci);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
iounmap(hcd->regs);
|
|
fail_io:
|
|
clk_disable(s5p_ehci->clk);
|
|
fail_clken:
|
|
clk_put(s5p_ehci->clk);
|
|
fail_clk:
|
|
usb_put_hcd(hcd);
|
|
fail_hcd:
|
|
kfree(s5p_ehci);
|
|
return err;
|
|
}
|
|
|
|
static int __devexit s5p_ehci_remove(struct platform_device *pdev)
|
|
{
|
|
struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
|
|
struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
|
|
struct usb_hcd *hcd = s5p_ehci->hcd;
|
|
|
|
usb_remove_hcd(hcd);
|
|
|
|
if (pdata && pdata->phy_exit)
|
|
pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
|
|
|
|
iounmap(hcd->regs);
|
|
|
|
clk_disable(s5p_ehci->clk);
|
|
clk_put(s5p_ehci->clk);
|
|
|
|
usb_put_hcd(hcd);
|
|
kfree(s5p_ehci);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void s5p_ehci_shutdown(struct platform_device *pdev)
|
|
{
|
|
struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
|
|
struct usb_hcd *hcd = s5p_ehci->hcd;
|
|
|
|
if (hcd->driver->shutdown)
|
|
hcd->driver->shutdown(hcd);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int s5p_ehci_suspend(struct device *dev)
|
|
{
|
|
struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
|
|
struct usb_hcd *hcd = s5p_ehci->hcd;
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
|
|
unsigned long flags;
|
|
int rc = 0;
|
|
|
|
if (time_before(jiffies, ehci->next_statechange))
|
|
msleep(20);
|
|
|
|
/*
|
|
* Root hub was already suspended. Disable irq emission and
|
|
* mark HW unaccessible. The PM and USB cores make sure that
|
|
* the root hub is either suspended or stopped.
|
|
*/
|
|
ehci_prepare_ports_for_controller_suspend(ehci, device_may_wakeup(dev));
|
|
spin_lock_irqsave(&ehci->lock, flags);
|
|
ehci_writel(ehci, 0, &ehci->regs->intr_enable);
|
|
(void)ehci_readl(ehci, &ehci->regs->intr_enable);
|
|
|
|
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
spin_unlock_irqrestore(&ehci->lock, flags);
|
|
|
|
if (pdata && pdata->phy_exit)
|
|
pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int s5p_ehci_resume(struct device *dev)
|
|
{
|
|
struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
|
|
struct usb_hcd *hcd = s5p_ehci->hcd;
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
|
|
|
|
if (pdata && pdata->phy_init)
|
|
pdata->phy_init(pdev, S5P_USB_PHY_HOST);
|
|
|
|
if (time_before(jiffies, ehci->next_statechange))
|
|
msleep(100);
|
|
|
|
/* Mark hardware accessible again as we are out of D3 state by now */
|
|
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
|
|
if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
|
|
int mask = INTR_MASK;
|
|
|
|
ehci_prepare_ports_for_controller_resume(ehci);
|
|
if (!hcd->self.root_hub->do_remote_wakeup)
|
|
mask &= ~STS_PCD;
|
|
ehci_writel(ehci, mask, &ehci->regs->intr_enable);
|
|
ehci_readl(ehci, &ehci->regs->intr_enable);
|
|
return 0;
|
|
}
|
|
|
|
usb_root_hub_lost_power(hcd->self.root_hub);
|
|
|
|
(void) ehci_halt(ehci);
|
|
(void) ehci_reset(ehci);
|
|
|
|
/* emptying the schedule aborts any urbs */
|
|
spin_lock_irq(&ehci->lock);
|
|
if (ehci->reclaim)
|
|
end_unlink_async(ehci);
|
|
ehci_work(ehci);
|
|
spin_unlock_irq(&ehci->lock);
|
|
|
|
ehci_writel(ehci, ehci->command, &ehci->regs->command);
|
|
ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
|
|
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
|
|
|
|
/* here we "know" root ports should always stay powered */
|
|
ehci_port_power(ehci, 1);
|
|
|
|
hcd->state = HC_STATE_SUSPENDED;
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define s5p_ehci_suspend NULL
|
|
#define s5p_ehci_resume NULL
|
|
#endif
|
|
|
|
static const struct dev_pm_ops s5p_ehci_pm_ops = {
|
|
.suspend = s5p_ehci_suspend,
|
|
.resume = s5p_ehci_resume,
|
|
};
|
|
|
|
static struct platform_driver s5p_ehci_driver = {
|
|
.probe = s5p_ehci_probe,
|
|
.remove = __devexit_p(s5p_ehci_remove),
|
|
.shutdown = s5p_ehci_shutdown,
|
|
.driver = {
|
|
.name = "s5p-ehci",
|
|
.owner = THIS_MODULE,
|
|
.pm = &s5p_ehci_pm_ops,
|
|
}
|
|
};
|
|
|
|
MODULE_ALIAS("platform:s5p-ehci");
|