Release 4.9 drivers/usb/dwc3/dwc3-exynos.c
/**
* dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Anton Tikhomirov <av.tikhomirov@samsung.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 of
* the License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/usb/otg.h>
#include <linux/usb/usb_phy_generic.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/regulator/consumer.h>
struct dwc3_exynos {
struct platform_device *usb2_phy;
struct platform_device *usb3_phy;
struct device *dev;
struct clk *clk;
struct clk *susp_clk;
struct clk *axius_clk;
struct regulator *vdd33;
struct regulator *vdd10;
};
static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
{
struct usb_phy_generic_platform_data pdata;
struct platform_device *pdev;
int ret;
memset(&pdata, 0x00, sizeof(pdata));
pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
if (!pdev)
return -ENOMEM;
exynos->usb2_phy = pdev;
pdata.type = USB_PHY_TYPE_USB2;
pdata.gpio_reset = -1;
ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
if (ret)
goto err1;
pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO);
if (!pdev) {
ret = -ENOMEM;
goto err1;
}
exynos->usb3_phy = pdev;
pdata.type = USB_PHY_TYPE_USB3;
ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
if (ret)
goto err2;
ret = platform_device_add(exynos->usb2_phy);
if (ret)
goto err2;
ret = platform_device_add(exynos->usb3_phy);
if (ret)
goto err3;
return 0;
err3:
platform_device_del(exynos->usb2_phy);
err2:
platform_device_put(exynos->usb3_phy);
err1:
platform_device_put(exynos->usb2_phy);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| felipe balbi | felipe balbi | 213 | 95.95% | 2 | 50.00% |
| heikki krogerus | heikki krogerus | 7 | 3.15% | 1 | 25.00% |
| vivek gautam | vivek gautam | 2 | 0.90% | 1 | 25.00% |
| Total | 222 | 100.00% | 4 | 100.00% |
static int dwc3_exynos_remove_child(struct device *dev, void *unused)
{
struct platform_device *pdev = to_platform_device(dev);
platform_device_unregister(pdev);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| vivek gautam | vivek gautam | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
static int dwc3_exynos_probe(struct platform_device *pdev)
{
struct dwc3_exynos *exynos;
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
int ret;
exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
if (!exynos)
return -ENOMEM;
/*
* 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 move to full device tree support this will vanish off.
*/
ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
return ret;
platform_set_drvdata(pdev, exynos);
exynos->dev = dev;
exynos->clk = devm_clk_get(dev, "usbdrd30");
if (IS_ERR(exynos->clk)) {
dev_err(dev, "couldn't get clock\n");
return -EINVAL;
}
clk_prepare_enable(exynos->clk);
exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk");
if (IS_ERR(exynos->susp_clk)) {
dev_info(dev, "no suspend clk specified\n");
exynos->susp_clk = NULL;
}
clk_prepare_enable(exynos->susp_clk);
if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) {
exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk");
if (IS_ERR(exynos->axius_clk)) {
dev_err(dev, "no AXI UpScaler clk specified\n");
return -ENODEV;
}
clk_prepare_enable(exynos->axius_clk);
} else {
exynos->axius_clk = NULL;
}
exynos->vdd33 = devm_regulator_get(dev, "vdd33");
if (IS_ERR(exynos->vdd33)) {
ret = PTR_ERR(exynos->vdd33);
goto err2;
}
ret = regulator_enable(exynos->vdd33);
if (ret) {
dev_err(dev, "Failed to enable VDD33 supply\n");
goto err2;
}
exynos->vdd10 = devm_regulator_get(dev, "vdd10");
if (IS_ERR(exynos->vdd10)) {
ret = PTR_ERR(exynos->vdd10);
goto err3;
}
ret = regulator_enable(exynos->vdd10);
if (ret) {
dev_err(dev, "Failed to enable VDD10 supply\n");
goto err3;
}
ret = dwc3_exynos_register_phys(exynos);
if (ret) {
dev_err(dev, "couldn't register PHYs\n");
goto err4;
}
if (node) {
ret = of_platform_populate(node, NULL, NULL, dev);
if (ret) {
dev_err(dev, "failed to add dwc3 core\n");
goto err5;
}
} else {
dev_err(dev, "no device node, failed to add dwc3 core\n");
ret = -ENODEV;
goto err5;
}
return 0;
err5:
platform_device_unregister(exynos->usb2_phy);
platform_device_unregister(exynos->usb3_phy);
err4:
regulator_disable(exynos->vdd10);
err3:
regulator_disable(exynos->vdd33);
err2:
clk_disable_unprepare(exynos->axius_clk);
clk_disable_unprepare(exynos->susp_clk);
clk_disable_unprepare(exynos->clk);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| vivek gautam | vivek gautam | 296 | 59.92% | 7 | 46.67% |
| anton tikhomirov | anton tikhomirov | 118 | 23.89% | 1 | 6.67% |
| steinar h. gunderson | steinar h. gunderson | 41 | 8.30% | 1 | 6.67% |
| jingoo han | jingoo han | 14 | 2.83% | 1 | 6.67% |
| russell king | russell king | 10 | 2.02% | 2 | 13.33% |
| andy shevchenko | andy shevchenko | 9 | 1.82% | 1 | 6.67% |
| stephen warren | stephen warren | 5 | 1.01% | 1 | 6.67% |
| felipe balbi | felipe balbi | 1 | 0.20% | 1 | 6.67% |
| Total | 494 | 100.00% | 15 | 100.00% |
static int dwc3_exynos_remove(struct platform_device *pdev)
{
struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child);
platform_device_unregister(exynos->usb2_phy);
platform_device_unregister(exynos->usb3_phy);
clk_disable_unprepare(exynos->axius_clk);
clk_disable_unprepare(exynos->susp_clk);
clk_disable_unprepare(exynos->clk);
regulator_disable(exynos->vdd33);
regulator_disable(exynos->vdd10);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| anton tikhomirov | anton tikhomirov | 34 | 40.00% | 1 | 14.29% |
| vivek gautam | vivek gautam | 29 | 34.12% | 4 | 57.14% |
| peter chen | peter chen | 12 | 14.12% | 1 | 14.29% |
| felipe balbi | felipe balbi | 10 | 11.76% | 1 | 14.29% |
| Total | 85 | 100.00% | 7 | 100.00% |
static const struct of_device_id exynos_dwc3_match[] = {
{ .compatible = "samsung,exynos5250-dwusb3" },
{ .compatible = "samsung,exynos7-dwusb3" },
{},
};
MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
#ifdef CONFIG_PM_SLEEP
static int dwc3_exynos_suspend(struct device *dev)
{
struct dwc3_exynos *exynos = dev_get_drvdata(dev);
clk_disable(exynos->axius_clk);
clk_disable(exynos->clk);
regulator_disable(exynos->vdd33);
regulator_disable(exynos->vdd10);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| vikas sajjan | vikas sajjan | 31 | 59.62% | 1 | 33.33% |
| vivek gautam | vivek gautam | 21 | 40.38% | 2 | 66.67% |
| Total | 52 | 100.00% | 3 | 100.00% |
static int dwc3_exynos_resume(struct device *dev)
{
struct dwc3_exynos *exynos = dev_get_drvdata(dev);
int ret;
ret = regulator_enable(exynos->vdd33);
if (ret) {
dev_err(dev, "Failed to enable VDD33 supply\n");
return ret;
}
ret = regulator_enable(exynos->vdd10);
if (ret) {
dev_err(dev, "Failed to enable VDD10 supply\n");
return ret;
}
clk_enable(exynos->clk);
clk_enable(exynos->axius_clk);
/* runtime set active to reflect active state. */
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| vivek gautam | vivek gautam | 60 | 56.07% | 2 | 66.67% |
| vikas sajjan | vikas sajjan | 47 | 43.93% | 1 | 33.33% |
| Total | 107 | 100.00% | 3 | 100.00% |
static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume)
};
#define DEV_PM_OPS (&dwc3_exynos_dev_pm_ops)
#else
#define DEV_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
static struct platform_driver dwc3_exynos_driver = {
.probe = dwc3_exynos_probe,
.remove = dwc3_exynos_remove,
.driver = {
.name = "exynos-dwc3",
.of_match_table = exynos_dwc3_match,
.pm = DEV_PM_OPS,
},
};
module_platform_driver(dwc3_exynos_driver);
MODULE_ALIAS("platform:exynos-dwc3");
MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| vivek gautam | vivek gautam | 505 | 42.19% | 9 | 36.00% |
| felipe balbi | felipe balbi | 242 | 20.22% | 5 | 20.00% |
| anton tikhomirov | anton tikhomirov | 238 | 19.88% | 1 | 4.00% |
| vikas sajjan | vikas sajjan | 112 | 9.36% | 1 | 4.00% |
| steinar h. gunderson | steinar h. gunderson | 41 | 3.43% | 1 | 4.00% |
| jingoo han | jingoo han | 16 | 1.34% | 2 | 8.00% |
| peter chen | peter chen | 12 | 1.00% | 1 | 4.00% |
| russell king | russell king | 10 | 0.84% | 2 | 8.00% |
| andy shevchenko | andy shevchenko | 9 | 0.75% | 1 | 4.00% |
| heikki krogerus | heikki krogerus | 7 | 0.58% | 1 | 4.00% |
| stephen warren | stephen warren | 5 | 0.42% | 1 | 4.00% |
| Total | 1197 | 100.00% | 25 | 100.00% |