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