cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rcar2.c (1544B)

      1// SPDX-License-Identifier: GPL-1.0+
      2/*
      3 * Renesas USB driver R-Car Gen. 2 initialization and power control
      4 *
      5 * Copyright (C) 2014 Ulrich Hecht
      6 * Copyright (C) 2019 Renesas Electronics Corporation
      7 */
      8
      9#include <linux/phy/phy.h>
     10#include "common.h"
     11#include "rcar2.h"
     12
     13static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
     14{
     15	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
     16
     17	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
     18		struct phy *phy = phy_get(&pdev->dev, "usb");
     19
     20		if (IS_ERR(phy))
     21			return PTR_ERR(phy);
     22
     23		priv->phy = phy;
     24		return 0;
     25	}
     26
     27	return -ENXIO;
     28}
     29
     30static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
     31{
     32	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
     33
     34	if (priv->phy) {
     35		phy_put(&pdev->dev, priv->phy);
     36		priv->phy = NULL;
     37	}
     38
     39	return 0;
     40}
     41
     42static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
     43				void __iomem *base, int enable)
     44{
     45	struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
     46	int retval = -ENODEV;
     47
     48	if (priv->phy) {
     49		if (enable) {
     50			retval = phy_init(priv->phy);
     51
     52			if (!retval)
     53				retval = phy_power_on(priv->phy);
     54		} else {
     55			phy_power_off(priv->phy);
     56			phy_exit(priv->phy);
     57			retval = 0;
     58		}
     59	}
     60
     61	return retval;
     62}
     63
     64const struct renesas_usbhs_platform_info usbhs_rcar_gen2_plat_info = {
     65	.platform_callback = {
     66		.hardware_init = usbhs_rcar2_hardware_init,
     67		.hardware_exit = usbhs_rcar2_hardware_exit,
     68		.power_ctrl = usbhs_rcar2_power_ctrl,
     69		.get_id = usbhs_get_id_as_gadget,
     70	},
     71	.driver_param = {
     72		.has_usb_dmac = 1,
     73		.has_new_pipe_configs = 1,
     74	},
     75};