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Commit 2400780e authored by Peter Chen's avatar Peter Chen Committed by Felipe Balbi
Browse files

usb: phy: mxs: Add platform judgement code 



The mxs-phy has several bugs and features at different
versions, the driver code can get it through of_device_id.data.

Signed-off-by: default avatarPeter Chen <peter.chen@freescale.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 14de8c3a

drivers/usb/phy/phy-mxs-usb.c

+49 −9
Original line number Diff line number Diff line 
/*

 * Copyright 2012 Freescale Semiconductor, Inc.

 * Copyright 2012-2013 Freescale Semiconductor, Inc.

 * Copyright (C) 2012 Marek Vasut <marex@denx.de>

 * on behalf of DENX Software Engineering GmbH

 *
@@ -20,6 +20,7 @@ 
#include <linux/delay.h>

#include <linux/err.h>

#include <linux/io.h>

#include <linux/of_device.h>



#define DRIVER_NAME "mxs_phy"
@@ -34,13 +35,55 @@ 
#define BM_USBPHY_CTRL_ENUTMILEVEL2		BIT(14)

#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT	BIT(1)



#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)



/* Do disconnection between PHY and controller without vbus */

#define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS	BIT(0)



/*

 * The PHY will be in messy if there is a wakeup after putting

 * bus to suspend (set portsc.suspendM) but before setting PHY to low

 * power mode (set portsc.phcd).

 */

#define MXS_PHY_ABNORMAL_IN_SUSPEND		BIT(1)



/*

 * The SOF sends too fast after resuming, it will cause disconnection

 * between host and high speed device.

 */

#define MXS_PHY_SENDING_SOF_TOO_FAST		BIT(2)



struct mxs_phy_data {

	unsigned int flags;

};



static const struct mxs_phy_data imx23_phy_data = {

	.flags = MXS_PHY_ABNORMAL_IN_SUSPEND | MXS_PHY_SENDING_SOF_TOO_FAST,

};



static const struct mxs_phy_data imx6q_phy_data = {

	.flags = MXS_PHY_SENDING_SOF_TOO_FAST |

		MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,

};



static const struct mxs_phy_data imx6sl_phy_data = {

	.flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,

};



static const struct of_device_id mxs_phy_dt_ids[] = {

	{ .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, },

	{ .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, },

	{ .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);



struct mxs_phy {

	struct usb_phy phy;

	struct clk *clk;

	const struct mxs_phy_data *data;

};



#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)



static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)

{

	int ret;
@@ -138,6 +181,8 @@ static int mxs_phy_probe(struct platform_device *pdev) 
	struct clk *clk;

	struct mxs_phy *mxs_phy;

	int ret;

	const struct of_device_id *of_id =

			of_match_device(mxs_phy_dt_ids, &pdev->dev);



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	base = devm_ioremap_resource(&pdev->dev, res);
@@ -168,6 +213,7 @@ static int mxs_phy_probe(struct platform_device *pdev) 
	mxs_phy->phy.type		= USB_PHY_TYPE_USB2;



	mxs_phy->clk = clk;

	mxs_phy->data = of_id->data;



	platform_set_drvdata(pdev, mxs_phy);
@@ -187,12 +233,6 @@ static int mxs_phy_remove(struct platform_device *pdev) 
	return 0;

}



static const struct of_device_id mxs_phy_dt_ids[] = {

	{ .compatible = "fsl,imx23-usbphy", },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);



static struct platform_driver mxs_phy_driver = {

	.probe = mxs_phy_probe,

	.remove = mxs_phy_remove,