1 /*
2 * Renesas USB driver R-Car Gen. 2 initialization and power control
3 *
4 * Copyright (C) 2014 Ulrich Hecht
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 */
12
13 #include <linux/gpio.h>
14 #include <linux/of_gpio.h>
15 #include <linux/phy/phy.h>
16 #include <linux/platform_data/gpio-rcar.h>
17 #include <linux/usb/phy.h>
18 #include "common.h"
19 #include "rcar2.h"
20
usbhs_rcar2_hardware_init(struct platform_device * pdev)21 static int usbhs_rcar2_hardware_init(struct platform_device *pdev)
22 {
23 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
24
25 if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
26 struct phy *phy = phy_get(&pdev->dev, "usb");
27
28 if (IS_ERR(phy))
29 return PTR_ERR(phy);
30
31 priv->phy = phy;
32 return 0;
33 }
34
35 if (IS_ENABLED(CONFIG_USB_PHY)) {
36 struct usb_phy *usb_phy = usb_get_phy_dev(&pdev->dev, 0);
37
38 if (IS_ERR(usb_phy))
39 return PTR_ERR(usb_phy);
40
41 priv->usb_phy = usb_phy;
42 return 0;
43 }
44
45 return -ENXIO;
46 }
47
usbhs_rcar2_hardware_exit(struct platform_device * pdev)48 static int usbhs_rcar2_hardware_exit(struct platform_device *pdev)
49 {
50 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
51
52 if (priv->phy) {
53 phy_put(priv->phy);
54 priv->phy = NULL;
55 }
56
57 if (priv->usb_phy) {
58 usb_put_phy(priv->usb_phy);
59 priv->usb_phy = NULL;
60 }
61
62 return 0;
63 }
64
usbhs_rcar2_power_ctrl(struct platform_device * pdev,void __iomem * base,int enable)65 static int usbhs_rcar2_power_ctrl(struct platform_device *pdev,
66 void __iomem *base, int enable)
67 {
68 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
69 int retval = -ENODEV;
70
71 if (priv->phy) {
72 if (enable) {
73 retval = phy_init(priv->phy);
74
75 if (!retval)
76 retval = phy_power_on(priv->phy);
77 } else {
78 phy_power_off(priv->phy);
79 phy_exit(priv->phy);
80 retval = 0;
81 }
82 }
83
84 if (priv->usb_phy) {
85 if (enable) {
86 retval = usb_phy_init(priv->usb_phy);
87
88 if (!retval)
89 retval = usb_phy_set_suspend(priv->usb_phy, 0);
90 } else {
91 usb_phy_set_suspend(priv->usb_phy, 1);
92 usb_phy_shutdown(priv->usb_phy);
93 retval = 0;
94 }
95 }
96
97 return retval;
98 }
99
usbhs_rcar2_get_id(struct platform_device * pdev)100 static int usbhs_rcar2_get_id(struct platform_device *pdev)
101 {
102 return USBHS_GADGET;
103 }
104
105 const struct renesas_usbhs_platform_callback usbhs_rcar2_ops = {
106 .hardware_init = usbhs_rcar2_hardware_init,
107 .hardware_exit = usbhs_rcar2_hardware_exit,
108 .power_ctrl = usbhs_rcar2_power_ctrl,
109 .get_id = usbhs_rcar2_get_id,
110 };
111