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Commit d720f057 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: dwc3: exynos: add nop transceiver support 



We will be adding support for transceivers on
dwc3 driver but not all boards have controllable
transceivers.

For those which don't provide controllable transceivers
we will register nop transceivers.

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent a418cc4e

drivers/usb/dwc3/dwc3-exynos.c

+66 −0
Original line number Diff line number Diff line
@@ -19,16 +19,74 @@ 
#include <linux/platform_data/dwc3-exynos.h>

#include <linux/dma-mapping.h>

#include <linux/clk.h>

#include <linux/usb/otg.h>

#include <linux/usb/nop-usb-xceiv.h>



#include "core.h"



struct dwc3_exynos {

	struct platform_device	*dwc3;

	struct platform_device	*usb2_phy;

	struct platform_device	*usb3_phy;

	struct device		*dev;



	struct clk		*clk;

};



static int __devinit dwc3_exynos_register_phys(struct dwc3_exynos *exynos)

{

	struct nop_usb_xceiv_platform_data pdata;

	struct platform_device	*pdev;

	int			ret;



	memset(&pdata, 0x00, sizeof(pdata));



	pdev = platform_device_alloc("nop_usb_xceiv", 0);

	if (!pdev)

		return -ENOMEM;



	exynos->usb2_phy = pdev;

	pdata.type = USB_PHY_TYPE_USB2;



	ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));

	if (ret)

		goto err1;



	pdev = platform_device_alloc("nop_usb_xceiv", 1);

	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;

}



static int __devinit dwc3_exynos_probe(struct platform_device *pdev)

{

	struct dwc3_exynos_data	*pdata = pdev->dev.platform_data;
@@ -51,6 +109,12 @@ static int __devinit dwc3_exynos_probe(struct platform_device *pdev) 
	if (devid < 0)

		goto err1;



	ret = dwc3_exynos_register_phys(exynos);

	if (ret) {

		dev_err(&pdev->dev, "couldn't register PHYs\n");

		goto err1;

	}



	dwc3 = platform_device_alloc("dwc3", devid);

	if (!dwc3) {

		dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
@@ -120,6 +184,8 @@ static int __devexit dwc3_exynos_remove(struct platform_device *pdev) 
	struct dwc3_exynos_data *pdata = pdev->dev.platform_data;



	platform_device_unregister(exynos->dwc3);

	platform_device_unregister(exynos->usb2_phy);

	platform_device_unregister(exynos->usb3_phy);



	dwc3_put_device_id(exynos->dwc3->id);