Contributors: 25
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Deepak Sikri |
447 |
62.96% |
2 |
5.00% |
| Manjunath Goudar |
84 |
11.83% |
1 |
2.50% |
| Stefan Roese |
27 |
3.80% |
1 |
2.50% |
| Linus Torvalds |
25 |
3.52% |
6 |
15.00% |
| Randy Dunlap |
18 |
2.54% |
1 |
2.50% |
| Alan Stern |
15 |
2.11% |
4 |
10.00% |
| Viresh Kumar |
14 |
1.97% |
1 |
2.50% |
| Russell King |
14 |
1.97% |
2 |
5.00% |
| Linus Torvalds (pre-git) |
10 |
1.41% |
5 |
12.50% |
| Vivek Gautam |
10 |
1.41% |
1 |
2.50% |
| Luis de Bethencourt |
7 |
0.99% |
1 |
2.50% |
| Stephen Warren |
7 |
0.99% |
1 |
2.50% |
| Amardeep Rai |
5 |
0.70% |
1 |
2.50% |
| Paul Cercueil |
5 |
0.70% |
1 |
2.50% |
| Sylvain Munaut |
4 |
0.56% |
1 |
2.50% |
| Deepak Saxena |
3 |
0.42% |
1 |
2.50% |
| Eric Lescouet |
2 |
0.28% |
1 |
2.50% |
| Tony Jones |
2 |
0.28% |
1 |
2.50% |
| Greg Kroah-Hartman |
2 |
0.28% |
2 |
5.00% |
| Uwe Kleine-König |
2 |
0.28% |
1 |
2.50% |
| Tejun Heo |
2 |
0.28% |
1 |
2.50% |
| Peter Chen |
2 |
0.28% |
1 |
2.50% |
| Hauke Mehrtens |
1 |
0.14% |
1 |
2.50% |
| Nico Pitre |
1 |
0.14% |
1 |
2.50% |
| Jingoo Han |
1 |
0.14% |
1 |
2.50% |
| Total |
710 |
|
40 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for EHCI HCD on SPEAr SOC
*
* Copyright (C) 2010 ST Micro Electronics,
* Deepak Sikri <deepak.sikri@st.com>
*
* Based on various ehci-*.c drivers
*/
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "ehci.h"
#define DRIVER_DESC "EHCI SPEAr driver"
struct spear_ehci {
struct clk *clk;
};
#define to_spear_ehci(hcd) (struct spear_ehci *)(hcd_to_ehci(hcd)->priv)
static struct hc_driver __read_mostly ehci_spear_hc_driver;
static int __maybe_unused ehci_spear_drv_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
bool do_wakeup = device_may_wakeup(dev);
return ehci_suspend(hcd, do_wakeup);
}
static int __maybe_unused ehci_spear_drv_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
ehci_resume(hcd, false);
return 0;
}
static SIMPLE_DEV_PM_OPS(ehci_spear_pm_ops, ehci_spear_drv_suspend,
ehci_spear_drv_resume);
static int spear_ehci_hcd_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd ;
struct spear_ehci *sehci;
struct resource *res;
struct clk *usbh_clk;
const struct hc_driver *driver = &ehci_spear_hc_driver;
int irq, retval;
if (usb_disabled())
return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
retval = irq;
goto fail;
}
/*
* Right now device-tree probed devices don't get dma_mask set.
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (retval)
goto fail;
usbh_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(usbh_clk)) {
dev_err(&pdev->dev, "Error getting interface clock\n");
retval = PTR_ERR(usbh_clk);
goto fail;
}
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
goto fail;
}
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 err_put_hcd;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
sehci = to_spear_ehci(hcd);
sehci->clk = usbh_clk;
/* registers start at offset 0x0 */
hcd_to_ehci(hcd)->caps = hcd->regs;
clk_prepare_enable(sehci->clk);
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (retval)
goto err_stop_ehci;
device_wakeup_enable(hcd->self.controller);
return retval;
err_stop_ehci:
clk_disable_unprepare(sehci->clk);
err_put_hcd:
usb_put_hcd(hcd);
fail:
dev_err(&pdev->dev, "init fail, %d\n", retval);
return retval ;
}
static void spear_ehci_hcd_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct spear_ehci *sehci = to_spear_ehci(hcd);
usb_remove_hcd(hcd);
if (sehci->clk)
clk_disable_unprepare(sehci->clk);
usb_put_hcd(hcd);
}
static const struct of_device_id spear_ehci_id_table[] = {
{ .compatible = "st,spear600-ehci", },
{ },
};
MODULE_DEVICE_TABLE(of, spear_ehci_id_table);
static struct platform_driver spear_ehci_hcd_driver = {
.probe = spear_ehci_hcd_drv_probe,
.remove_new = spear_ehci_hcd_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "spear-ehci",
.bus = &platform_bus_type,
.pm = pm_ptr(&ehci_spear_pm_ops),
.of_match_table = spear_ehci_id_table,
}
};
static const struct ehci_driver_overrides spear_overrides __initconst = {
.extra_priv_size = sizeof(struct spear_ehci),
};
static int __init ehci_spear_init(void)
{
if (usb_disabled())
return -ENODEV;
ehci_init_driver(&ehci_spear_hc_driver, &spear_overrides);
return platform_driver_register(&spear_ehci_hcd_driver);
}
module_init(ehci_spear_init);
static void __exit ehci_spear_cleanup(void)
{
platform_driver_unregister(&spear_ehci_hcd_driver);
}
module_exit(ehci_spear_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS("platform:spear-ehci");
MODULE_AUTHOR("Deepak Sikri");
MODULE_LICENSE("GPL");