1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Renesas USB driver RZ/A2 initialization and power control
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2019 Chris Brandt
6*4882a593Smuzhiyun * Copyright (C) 2019 Renesas Electronics Corporation
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/delay.h>
10*4882a593Smuzhiyun #include <linux/io.h>
11*4882a593Smuzhiyun #include <linux/of_device.h>
12*4882a593Smuzhiyun #include <linux/phy/phy.h>
13*4882a593Smuzhiyun #include "common.h"
14*4882a593Smuzhiyun #include "rza.h"
15*4882a593Smuzhiyun
usbhs_rza2_hardware_init(struct platform_device * pdev)16*4882a593Smuzhiyun static int usbhs_rza2_hardware_init(struct platform_device *pdev)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
19*4882a593Smuzhiyun struct phy *phy = phy_get(&pdev->dev, "usb");
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun if (IS_ERR(phy))
22*4882a593Smuzhiyun return PTR_ERR(phy);
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun priv->phy = phy;
25*4882a593Smuzhiyun return 0;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
usbhs_rza2_hardware_exit(struct platform_device * pdev)28*4882a593Smuzhiyun static int usbhs_rza2_hardware_exit(struct platform_device *pdev)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun phy_put(&pdev->dev, priv->phy);
33*4882a593Smuzhiyun priv->phy = NULL;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun return 0;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
usbhs_rza2_power_ctrl(struct platform_device * pdev,void __iomem * base,int enable)38*4882a593Smuzhiyun static int usbhs_rza2_power_ctrl(struct platform_device *pdev,
39*4882a593Smuzhiyun void __iomem *base, int enable)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
42*4882a593Smuzhiyun int retval = 0;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (!priv->phy)
45*4882a593Smuzhiyun return -ENODEV;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun if (enable) {
48*4882a593Smuzhiyun retval = phy_init(priv->phy);
49*4882a593Smuzhiyun usbhs_bset(priv, SUSPMODE, SUSPM, SUSPM);
50*4882a593Smuzhiyun udelay(100); /* Wait for PLL to become stable */
51*4882a593Smuzhiyun if (!retval)
52*4882a593Smuzhiyun retval = phy_power_on(priv->phy);
53*4882a593Smuzhiyun } else {
54*4882a593Smuzhiyun usbhs_bset(priv, SUSPMODE, SUSPM, 0);
55*4882a593Smuzhiyun phy_power_off(priv->phy);
56*4882a593Smuzhiyun phy_exit(priv->phy);
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun return retval;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun const struct renesas_usbhs_platform_info usbhs_rza2_plat_info = {
63*4882a593Smuzhiyun .platform_callback = {
64*4882a593Smuzhiyun .hardware_init = usbhs_rza2_hardware_init,
65*4882a593Smuzhiyun .hardware_exit = usbhs_rza2_hardware_exit,
66*4882a593Smuzhiyun .power_ctrl = usbhs_rza2_power_ctrl,
67*4882a593Smuzhiyun .get_id = usbhs_get_id_as_gadget,
68*4882a593Smuzhiyun },
69*4882a593Smuzhiyun .driver_param = {
70*4882a593Smuzhiyun .has_cnen = 1,
71*4882a593Smuzhiyun .cfifo_byte_addr = 1,
72*4882a593Smuzhiyun .has_new_pipe_configs = 1,
73*4882a593Smuzhiyun },
74*4882a593Smuzhiyun };
75