152 lines
3.3 KiB
C
152 lines
3.3 KiB
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 as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/platform_data/dwc3-exynos.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/module.h>
|
|
#include <linux/clk.h>
|
|
|
|
#include "core.h"
|
|
|
|
struct dwc3_exynos {
|
|
struct platform_device *dwc3;
|
|
struct device *dev;
|
|
|
|
struct clk *clk;
|
|
};
|
|
|
|
static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
|
|
{
|
|
struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
|
|
struct platform_device *dwc3;
|
|
struct dwc3_exynos *exynos;
|
|
struct clk *clk;
|
|
|
|
int devid;
|
|
int ret = -ENOMEM;
|
|
|
|
exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
|
|
if (!exynos) {
|
|
dev_err(&pdev->dev, "not enough memory\n");
|
|
goto err0;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, exynos);
|
|
|
|
devid = dwc3_get_device_id();
|
|
if (devid < 0)
|
|
goto err1;
|
|
|
|
dwc3 = platform_device_alloc("dwc3", devid);
|
|
if (!dwc3) {
|
|
dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
|
|
goto err2;
|
|
}
|
|
|
|
clk = clk_get(&pdev->dev, "usbdrd30");
|
|
if (IS_ERR(clk)) {
|
|
dev_err(&pdev->dev, "couldn't get clock\n");
|
|
ret = -EINVAL;
|
|
goto err3;
|
|
}
|
|
|
|
dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
|
|
|
|
dwc3->dev.parent = &pdev->dev;
|
|
dwc3->dev.dma_mask = pdev->dev.dma_mask;
|
|
dwc3->dev.dma_parms = pdev->dev.dma_parms;
|
|
exynos->dwc3 = dwc3;
|
|
exynos->dev = &pdev->dev;
|
|
exynos->clk = clk;
|
|
|
|
clk_enable(exynos->clk);
|
|
|
|
/* PHY initialization */
|
|
if (!pdata) {
|
|
dev_dbg(&pdev->dev, "missing platform data\n");
|
|
} else {
|
|
if (pdata->phy_init)
|
|
pdata->phy_init(pdev, pdata->phy_type);
|
|
}
|
|
|
|
ret = platform_device_add_resources(dwc3, pdev->resource,
|
|
pdev->num_resources);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
|
|
goto err4;
|
|
}
|
|
|
|
ret = platform_device_add(dwc3);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register dwc3 device\n");
|
|
goto err4;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err4:
|
|
if (pdata && pdata->phy_exit)
|
|
pdata->phy_exit(pdev, pdata->phy_type);
|
|
|
|
clk_disable(clk);
|
|
clk_put(clk);
|
|
err3:
|
|
platform_device_put(dwc3);
|
|
err2:
|
|
dwc3_put_device_id(devid);
|
|
err1:
|
|
kfree(exynos);
|
|
err0:
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit dwc3_exynos_remove(struct platform_device *pdev)
|
|
{
|
|
struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
|
|
struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
|
|
|
|
platform_device_unregister(exynos->dwc3);
|
|
|
|
dwc3_put_device_id(exynos->dwc3->id);
|
|
|
|
if (pdata && pdata->phy_exit)
|
|
pdata->phy_exit(pdev, pdata->phy_type);
|
|
|
|
clk_disable(exynos->clk);
|
|
clk_put(exynos->clk);
|
|
|
|
kfree(exynos);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver dwc3_exynos_driver = {
|
|
.probe = dwc3_exynos_probe,
|
|
.remove = __devexit_p(dwc3_exynos_remove),
|
|
.driver = {
|
|
.name = "exynos-dwc3",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(dwc3_exynos_driver);
|
|
|
|
MODULE_ALIAS("platform:exynos-dwc3");
|
|
MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");
|