163 lines
3.5 KiB
C
163 lines
3.5 KiB
C
/*
|
|
* Copyright 2012 Freescale Semiconductor, Inc.
|
|
*
|
|
* The code contained herein is licensed under the GNU General Public
|
|
* License. You may obtain a copy of the GNU General Public License
|
|
* Version 2 or later at the following locations:
|
|
*
|
|
* http://www.opensource.org/licenses/gpl-license.html
|
|
* http://www.gnu.org/copyleft/gpl.html
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "ci13xxx_imx.h"
|
|
|
|
#define USB_DEV_MAX 4
|
|
|
|
#define BM_OVER_CUR_DIS BIT(7)
|
|
|
|
struct imx6q_usbmisc {
|
|
void __iomem *base;
|
|
spinlock_t lock;
|
|
struct clk *clk;
|
|
struct usbmisc_usb_device usbdev[USB_DEV_MAX];
|
|
};
|
|
|
|
static struct imx6q_usbmisc *usbmisc;
|
|
|
|
static struct usbmisc_usb_device *get_usbdev(struct device *dev)
|
|
{
|
|
int i, ret;
|
|
|
|
for (i = 0; i < USB_DEV_MAX; i++) {
|
|
if (usbmisc->usbdev[i].dev == dev)
|
|
return &usbmisc->usbdev[i];
|
|
else if (!usbmisc->usbdev[i].dev)
|
|
break;
|
|
}
|
|
|
|
if (i >= USB_DEV_MAX)
|
|
return ERR_PTR(-EBUSY);
|
|
|
|
ret = usbmisc_get_init_data(dev, &usbmisc->usbdev[i]);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
return &usbmisc->usbdev[i];
|
|
}
|
|
|
|
static int usbmisc_imx6q_init(struct device *dev)
|
|
{
|
|
|
|
struct usbmisc_usb_device *usbdev;
|
|
unsigned long flags;
|
|
u32 reg;
|
|
|
|
usbdev = get_usbdev(dev);
|
|
if (IS_ERR(usbdev))
|
|
return PTR_ERR(usbdev);
|
|
|
|
if (usbdev->disable_oc) {
|
|
spin_lock_irqsave(&usbmisc->lock, flags);
|
|
reg = readl(usbmisc->base + usbdev->index * 4);
|
|
writel(reg | BM_OVER_CUR_DIS,
|
|
usbmisc->base + usbdev->index * 4);
|
|
spin_unlock_irqrestore(&usbmisc->lock, flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct usbmisc_ops imx6q_usbmisc_ops = {
|
|
.init = usbmisc_imx6q_init,
|
|
};
|
|
|
|
static const struct of_device_id usbmisc_imx6q_dt_ids[] = {
|
|
{ .compatible = "fsl,imx6q-usbmisc"},
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static int usbmisc_imx6q_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
struct imx6q_usbmisc *data;
|
|
int ret;
|
|
|
|
if (usbmisc)
|
|
return -EBUSY;
|
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&data->lock);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
data->base = devm_request_and_ioremap(&pdev->dev, res);
|
|
if (!data->base)
|
|
return -EADDRNOTAVAIL;
|
|
|
|
data->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(data->clk)) {
|
|
dev_err(&pdev->dev,
|
|
"failed to get clock, err=%ld\n", PTR_ERR(data->clk));
|
|
return PTR_ERR(data->clk);
|
|
}
|
|
|
|
ret = clk_prepare_enable(data->clk);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"clk_prepare_enable failed, err=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = usbmisc_set_ops(&imx6q_usbmisc_ops);
|
|
if (ret) {
|
|
clk_disable_unprepare(data->clk);
|
|
return ret;
|
|
}
|
|
|
|
usbmisc = data;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usbmisc_imx6q_remove(struct platform_device *pdev)
|
|
{
|
|
usbmisc_unset_ops(&imx6q_usbmisc_ops);
|
|
clk_disable_unprepare(usbmisc->clk);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver usbmisc_imx6q_driver = {
|
|
.probe = usbmisc_imx6q_probe,
|
|
.remove = usbmisc_imx6q_remove,
|
|
.driver = {
|
|
.name = "usbmisc_imx6q",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = usbmisc_imx6q_dt_ids,
|
|
},
|
|
};
|
|
|
|
int __init usbmisc_imx6q_drv_init(void)
|
|
{
|
|
return platform_driver_register(&usbmisc_imx6q_driver);
|
|
}
|
|
subsys_initcall(usbmisc_imx6q_drv_init);
|
|
|
|
void __exit usbmisc_imx6q_drv_exit(void)
|
|
{
|
|
platform_driver_unregister(&usbmisc_imx6q_driver);
|
|
}
|
|
module_exit(usbmisc_imx6q_drv_exit);
|
|
|
|
MODULE_ALIAS("platform:usbmisc-imx6q");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("driver for imx6q usb non-core registers");
|
|
MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
|