mirror of https://gitee.com/openkylin/linux.git
199 lines
4.7 KiB
C
199 lines
4.7 KiB
C
/*
|
|
* Copyright 2012 Freescale Semiconductor, Inc.
|
|
* Copyright (C) 2012 Marek Vasut <marex@denx.de>
|
|
* on behalf of DENX Software Engineering GmbH
|
|
*
|
|
* 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/of_gpio.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/usb/chipidea.h>
|
|
#include <linux/clk.h>
|
|
|
|
#include "ci.h"
|
|
#include "ci_hdrc_imx.h"
|
|
|
|
struct ci_hdrc_imx_data {
|
|
struct usb_phy *phy;
|
|
struct platform_device *ci_pdev;
|
|
struct clk *clk;
|
|
struct imx_usbmisc_data *usbmisc_data;
|
|
};
|
|
|
|
/* Common functions shared by usbmisc drivers */
|
|
|
|
static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
|
|
{
|
|
struct device_node *np = dev->of_node;
|
|
struct of_phandle_args args;
|
|
struct imx_usbmisc_data *data;
|
|
int ret;
|
|
|
|
/*
|
|
* In case the fsl,usbmisc property is not present this device doesn't
|
|
* need usbmisc. Return NULL (which is no error here)
|
|
*/
|
|
if (!of_get_property(np, "fsl,usbmisc", NULL))
|
|
return NULL;
|
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
|
|
0, &args);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
|
|
ret);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
data->index = args.args[0];
|
|
of_node_put(args.np);
|
|
|
|
if (of_find_property(np, "disable-over-current", NULL))
|
|
data->disable_oc = 1;
|
|
|
|
if (of_find_property(np, "external-vbus-divider", NULL))
|
|
data->evdo = 1;
|
|
|
|
return data;
|
|
}
|
|
|
|
/* End of common functions shared by usbmisc drivers*/
|
|
|
|
static int ci_hdrc_imx_probe(struct platform_device *pdev)
|
|
{
|
|
struct ci_hdrc_imx_data *data;
|
|
struct ci_hdrc_platform_data pdata = {
|
|
.name = "ci_hdrc_imx",
|
|
.capoffset = DEF_CAPOFFSET,
|
|
.flags = CI_HDRC_REQUIRE_TRANSCEIVER |
|
|
CI_HDRC_DISABLE_STREAMING,
|
|
};
|
|
int ret;
|
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data) {
|
|
dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
|
|
if (IS_ERR(data->usbmisc_data))
|
|
return PTR_ERR(data->usbmisc_data);
|
|
|
|
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,
|
|
"Failed to prepare or enable clock, err=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
|
|
if (IS_ERR(data->phy)) {
|
|
ret = PTR_ERR(data->phy);
|
|
goto err_clk;
|
|
}
|
|
|
|
pdata.phy = data->phy;
|
|
|
|
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
goto err_clk;
|
|
|
|
if (data->usbmisc_data) {
|
|
ret = imx_usbmisc_init(data->usbmisc_data);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n",
|
|
ret);
|
|
goto err_clk;
|
|
}
|
|
}
|
|
|
|
data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
|
|
pdev->resource, pdev->num_resources,
|
|
&pdata);
|
|
if (IS_ERR(data->ci_pdev)) {
|
|
ret = PTR_ERR(data->ci_pdev);
|
|
dev_err(&pdev->dev,
|
|
"Can't register ci_hdrc platform device, err=%d\n",
|
|
ret);
|
|
goto err_clk;
|
|
}
|
|
|
|
if (data->usbmisc_data) {
|
|
ret = imx_usbmisc_init_post(data->usbmisc_data);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n",
|
|
ret);
|
|
goto disable_device;
|
|
}
|
|
}
|
|
|
|
platform_set_drvdata(pdev, data);
|
|
|
|
pm_runtime_no_callbacks(&pdev->dev);
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
return 0;
|
|
|
|
disable_device:
|
|
ci_hdrc_remove_device(data->ci_pdev);
|
|
err_clk:
|
|
clk_disable_unprepare(data->clk);
|
|
return ret;
|
|
}
|
|
|
|
static int ci_hdrc_imx_remove(struct platform_device *pdev)
|
|
{
|
|
struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
ci_hdrc_remove_device(data->ci_pdev);
|
|
clk_disable_unprepare(data->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
|
|
{ .compatible = "fsl,imx27-usb", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
|
|
|
|
static struct platform_driver ci_hdrc_imx_driver = {
|
|
.probe = ci_hdrc_imx_probe,
|
|
.remove = ci_hdrc_imx_remove,
|
|
.driver = {
|
|
.name = "imx_usb",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = ci_hdrc_imx_dt_ids,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(ci_hdrc_imx_driver);
|
|
|
|
MODULE_ALIAS("platform:imx-usb");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
|
|
MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
|
|
MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
|