OpenCloudOS-Kernel/drivers/usb/chipidea/ci_hdrc_imx.c

490 lines
11 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_platform_flag {
unsigned int flags;
bool runtime_pm;
};
static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
.flags = CI_HDRC_TURN_VBUS_EARLY_ON |
CI_HDRC_DISABLE_STREAMING,
};
static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
CI_HDRC_DISABLE_STREAMING,
};
static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
.flags = CI_HDRC_IMX28_WRITE_FIX |
CI_HDRC_TURN_VBUS_EARLY_ON |
CI_HDRC_DISABLE_STREAMING,
};
static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
CI_HDRC_TURN_VBUS_EARLY_ON |
CI_HDRC_DISABLE_STREAMING,
};
static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
CI_HDRC_TURN_VBUS_EARLY_ON |
CI_HDRC_DISABLE_HOST_STREAMING,
};
static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
CI_HDRC_TURN_VBUS_EARLY_ON |
CI_HDRC_DISABLE_HOST_STREAMING,
};
static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
CI_HDRC_TURN_VBUS_EARLY_ON,
};
static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
};
static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
{ .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
{ .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
{ .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
{ .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
{ .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
{ .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
struct ci_hdrc_imx_data {
struct usb_phy *phy;
struct platform_device *ci_pdev;
struct clk *clk;
struct imx_usbmisc_data *usbmisc_data;
bool supports_runtime_pm;
bool in_lpm;
/* SoC before i.mx6 (except imx23/imx28) needs three clks */
bool need_three_clks;
struct clk *clk_ipg;
struct clk *clk_ahb;
struct clk *clk_per;
/* --------------------------------- */
};
/* Common functions shared by usbmisc drivers */
static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
{
struct platform_device *misc_pdev;
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];
misc_pdev = of_find_device_by_node(args.np);
of_node_put(args.np);
if (!misc_pdev || !platform_get_drvdata(misc_pdev))
return ERR_PTR(-EPROBE_DEFER);
data->dev = &misc_pdev->dev;
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 imx_get_clks(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
int ret = 0;
data->clk_ipg = devm_clk_get(dev, "ipg");
if (IS_ERR(data->clk_ipg)) {
/* If the platform only needs one clocks */
data->clk = devm_clk_get(dev, NULL);
if (IS_ERR(data->clk)) {
ret = PTR_ERR(data->clk);
dev_err(dev,
"Failed to get clks, err=%ld,%ld\n",
PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
return ret;
}
return ret;
}
data->clk_ahb = devm_clk_get(dev, "ahb");
if (IS_ERR(data->clk_ahb)) {
ret = PTR_ERR(data->clk_ahb);
dev_err(dev,
"Failed to get ahb clock, err=%d\n", ret);
return ret;
}
data->clk_per = devm_clk_get(dev, "per");
if (IS_ERR(data->clk_per)) {
ret = PTR_ERR(data->clk_per);
dev_err(dev,
"Failed to get per clock, err=%d\n", ret);
return ret;
}
data->need_three_clks = true;
return ret;
}
static int imx_prepare_enable_clks(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
int ret = 0;
if (data->need_three_clks) {
ret = clk_prepare_enable(data->clk_ipg);
if (ret) {
dev_err(dev,
"Failed to prepare/enable ipg clk, err=%d\n",
ret);
return ret;
}
ret = clk_prepare_enable(data->clk_ahb);
if (ret) {
dev_err(dev,
"Failed to prepare/enable ahb clk, err=%d\n",
ret);
clk_disable_unprepare(data->clk_ipg);
return ret;
}
ret = clk_prepare_enable(data->clk_per);
if (ret) {
dev_err(dev,
"Failed to prepare/enable per clk, err=%d\n",
ret);
clk_disable_unprepare(data->clk_ahb);
clk_disable_unprepare(data->clk_ipg);
return ret;
}
} else {
ret = clk_prepare_enable(data->clk);
if (ret) {
dev_err(dev,
"Failed to prepare/enable clk, err=%d\n",
ret);
return ret;
}
}
return ret;
}
static void imx_disable_unprepare_clks(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
if (data->need_three_clks) {
clk_disable_unprepare(data->clk_per);
clk_disable_unprepare(data->clk_ahb);
clk_disable_unprepare(data->clk_ipg);
} else {
clk_disable_unprepare(data->clk);
}
}
static int ci_hdrc_imx_probe(struct platform_device *pdev)
{
struct ci_hdrc_imx_data *data;
struct ci_hdrc_platform_data pdata = {
.name = dev_name(&pdev->dev),
.capoffset = DEF_CAPOFFSET,
};
int ret;
const struct of_device_id *of_id;
const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
if (!of_id)
return -ENODEV;
imx_platform_flag = of_id->data;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
platform_set_drvdata(pdev, data);
data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
if (IS_ERR(data->usbmisc_data))
return PTR_ERR(data->usbmisc_data);
ret = imx_get_clks(&pdev->dev);
if (ret)
return ret;
ret = imx_prepare_enable_clks(&pdev->dev);
if (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);
/* Return -EINVAL if no usbphy is available */
if (ret == -ENODEV)
ret = -EINVAL;
goto err_clk;
}
pdata.usb_phy = data->phy;
pdata.flags |= imx_platform_flag->flags;
if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
data->supports_runtime_pm = true;
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
goto err_clk;
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);
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev,
"ci_hdrc_add_device failed, err=%d\n", ret);
goto err_clk;
}
ret = imx_usbmisc_init_post(data->usbmisc_data);
if (ret) {
dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
goto disable_device;
}
if (data->supports_runtime_pm) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
}
device_set_wakeup_capable(&pdev->dev, true);
return 0;
disable_device:
ci_hdrc_remove_device(data->ci_pdev);
err_clk:
imx_disable_unprepare_clks(&pdev->dev);
return ret;
}
static int ci_hdrc_imx_remove(struct platform_device *pdev)
{
struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
if (data->supports_runtime_pm) {
pm_runtime_get_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);
}
ci_hdrc_remove_device(data->ci_pdev);
imx_disable_unprepare_clks(&pdev->dev);
return 0;
}
static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
{
ci_hdrc_imx_remove(pdev);
}
#ifdef CONFIG_PM
static int imx_controller_suspend(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
dev_dbg(dev, "at %s\n", __func__);
imx_disable_unprepare_clks(dev);
data->in_lpm = true;
return 0;
}
static int imx_controller_resume(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
int ret = 0;
dev_dbg(dev, "at %s\n", __func__);
if (!data->in_lpm) {
WARN_ON(1);
return 0;
}
ret = imx_prepare_enable_clks(dev);
if (ret)
return ret;
data->in_lpm = false;
ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
if (ret) {
dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
goto clk_disable;
}
return 0;
clk_disable:
imx_disable_unprepare_clks(dev);
return ret;
}
#ifdef CONFIG_PM_SLEEP
static int ci_hdrc_imx_suspend(struct device *dev)
{
int ret;
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
if (data->in_lpm)
/* The core's suspend doesn't run */
return 0;
if (device_may_wakeup(dev)) {
ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
if (ret) {
dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
ret);
return ret;
}
}
return imx_controller_suspend(dev);
}
static int ci_hdrc_imx_resume(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
int ret;
ret = imx_controller_resume(dev);
if (!ret && data->supports_runtime_pm) {
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
}
return ret;
}
#endif /* CONFIG_PM_SLEEP */
static int ci_hdrc_imx_runtime_suspend(struct device *dev)
{
struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
int ret;
if (data->in_lpm) {
WARN_ON(1);
return 0;
}
ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
if (ret) {
dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
return ret;
}
return imx_controller_suspend(dev);
}
static int ci_hdrc_imx_runtime_resume(struct device *dev)
{
return imx_controller_resume(dev);
}
#endif /* CONFIG_PM */
static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
ci_hdrc_imx_runtime_resume, NULL)
};
static struct platform_driver ci_hdrc_imx_driver = {
.probe = ci_hdrc_imx_probe,
.remove = ci_hdrc_imx_remove,
.shutdown = ci_hdrc_imx_shutdown,
.driver = {
.name = "imx_usb",
.of_match_table = ci_hdrc_imx_dt_ids,
.pm = &ci_hdrc_imx_pm_ops,
},
};
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>");