1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Provides code common for host and device side USB.
4 *
5 * (C) Copyright 2016
6 * Texas Instruments Incorporated, <www.ti.com>
7 */
8
9 #include <common.h>
10 #include <dm.h>
11 #include <asm/global_data.h>
12 #include <linux/usb/otg.h>
13 #include <linux/usb/ch9.h>
14 #include <linux/usb/phy.h>
15
16 DECLARE_GLOBAL_DATA_PTR;
17
18 static const char *const usb_dr_modes[] = {
19 [USB_DR_MODE_UNKNOWN] = "",
20 [USB_DR_MODE_HOST] = "host",
21 [USB_DR_MODE_PERIPHERAL] = "peripheral",
22 [USB_DR_MODE_OTG] = "otg",
23 };
24
usb_get_dr_mode(ofnode node)25 enum usb_dr_mode usb_get_dr_mode(ofnode node)
26 {
27 const char *dr_mode;
28 int i;
29
30 dr_mode = ofnode_read_string(node, "dr_mode");
31 if (!dr_mode) {
32 pr_debug("usb dr_mode not found\n");
33 return USB_DR_MODE_UNKNOWN;
34 }
35
36 for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
37 if (!strcmp(dr_mode, usb_dr_modes[i]))
38 return i;
39
40 return USB_DR_MODE_UNKNOWN;
41 }
42
usb_get_role_switch_default_mode(ofnode node)43 enum usb_dr_mode usb_get_role_switch_default_mode(ofnode node)
44 {
45 const char *dr_mode;
46 int i;
47
48 dr_mode = ofnode_read_string(node, "role-switch-default-mode");
49 if (!dr_mode)
50 return USB_DR_MODE_UNKNOWN;
51
52 for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
53 if (!strcmp(dr_mode, usb_dr_modes[i]))
54 return i;
55
56 return USB_DR_MODE_UNKNOWN;
57 }
58
59 static const char *const speed_names[] = {
60 [USB_SPEED_UNKNOWN] = "UNKNOWN",
61 [USB_SPEED_LOW] = "low-speed",
62 [USB_SPEED_FULL] = "full-speed",
63 [USB_SPEED_HIGH] = "high-speed",
64 [USB_SPEED_WIRELESS] = "wireless",
65 [USB_SPEED_SUPER] = "super-speed",
66 [USB_SPEED_SUPER_PLUS] = "super-speed-plus",
67 };
68
usb_speed_string(enum usb_device_speed speed)69 const char *usb_speed_string(enum usb_device_speed speed)
70 {
71 if (speed < 0 || speed >= ARRAY_SIZE(speed_names))
72 speed = USB_SPEED_UNKNOWN;
73 return speed_names[speed];
74 }
75
usb_get_maximum_speed(ofnode node)76 enum usb_device_speed usb_get_maximum_speed(ofnode node)
77 {
78 const char *max_speed;
79 int i;
80
81 max_speed = ofnode_read_string(node, "maximum-speed");
82 if (!max_speed) {
83 pr_debug("usb maximum-speed not found\n");
84 return USB_SPEED_UNKNOWN;
85 }
86
87 for (i = 0; i < ARRAY_SIZE(speed_names); i++)
88 if (!strcmp(max_speed, speed_names[i]))
89 return i;
90
91 return USB_SPEED_UNKNOWN;
92 }
93
94 #if CONFIG_IS_ENABLED(DM_USB)
95 static const char *const usbphy_modes[] = {
96 [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
97 [USBPHY_INTERFACE_MODE_UTMI] = "utmi",
98 [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
99 [USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
100 [USBPHY_INTERFACE_MODE_SERIAL] = "serial",
101 [USBPHY_INTERFACE_MODE_HSIC] = "hsic",
102 };
103
usb_get_phy_mode(ofnode node)104 enum usb_phy_interface usb_get_phy_mode(ofnode node)
105 {
106 const char *phy_type;
107 int i;
108
109 phy_type = ofnode_get_property(node, "phy_type", NULL);
110 if (!phy_type)
111 return USBPHY_INTERFACE_MODE_UNKNOWN;
112
113 for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
114 if (!strcmp(phy_type, usbphy_modes[i]))
115 return i;
116
117 return USBPHY_INTERFACE_MODE_UNKNOWN;
118 }
119 #endif
120