Branch data Line data Source code
1 : : /*
2 : : * Provides code common for host and device side USB.
3 : : *
4 : : * This program is free software; you can redistribute it and/or
5 : : * modify it under the terms of the GNU General Public License as
6 : : * published by the Free Software Foundation, version 2.
7 : : *
8 : : * If either host side (ie. CONFIG_USB=y) or device side USB stack
9 : : * (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is
10 : : * compiled-in as well. Otherwise, if either of the two stacks is
11 : : * compiled as module, this file is compiled as module as well.
12 : : */
13 : :
14 : : #include <linux/kernel.h>
15 : : #include <linux/module.h>
16 : : #include <linux/of.h>
17 : : #include <linux/usb/ch9.h>
18 : : #include <linux/usb/of.h>
19 : : #include <linux/usb/otg.h>
20 : :
21 : 0 : const char *usb_otg_state_string(enum usb_otg_state state)
22 : : {
23 : : static const char *const names[] = {
24 : : [OTG_STATE_A_IDLE] = "a_idle",
25 : : [OTG_STATE_A_WAIT_VRISE] = "a_wait_vrise",
26 : : [OTG_STATE_A_WAIT_BCON] = "a_wait_bcon",
27 : : [OTG_STATE_A_HOST] = "a_host",
28 : : [OTG_STATE_A_SUSPEND] = "a_suspend",
29 : : [OTG_STATE_A_PERIPHERAL] = "a_peripheral",
30 : : [OTG_STATE_A_WAIT_VFALL] = "a_wait_vfall",
31 : : [OTG_STATE_A_VBUS_ERR] = "a_vbus_err",
32 : : [OTG_STATE_B_IDLE] = "b_idle",
33 : : [OTG_STATE_B_SRP_INIT] = "b_srp_init",
34 : : [OTG_STATE_B_PERIPHERAL] = "b_peripheral",
35 : : [OTG_STATE_B_WAIT_ACON] = "b_wait_acon",
36 : : [OTG_STATE_B_HOST] = "b_host",
37 : : };
38 : :
39 [ # # ]: 0 : if (state < 0 || state >= ARRAY_SIZE(names))
40 : : return "UNDEFINED";
41 : :
42 : 0 : return names[state];
43 : : }
44 : : EXPORT_SYMBOL_GPL(usb_otg_state_string);
45 : :
46 : : static const char *const speed_names[] = {
47 : : [USB_SPEED_UNKNOWN] = "UNKNOWN",
48 : : [USB_SPEED_LOW] = "low-speed",
49 : : [USB_SPEED_FULL] = "full-speed",
50 : : [USB_SPEED_HIGH] = "high-speed",
51 : : [USB_SPEED_WIRELESS] = "wireless",
52 : : [USB_SPEED_SUPER] = "super-speed",
53 : : };
54 : :
55 : 0 : const char *usb_speed_string(enum usb_device_speed speed)
56 : : {
57 [ - + ]: 2 : if (speed < 0 || speed >= ARRAY_SIZE(speed_names))
58 : : speed = USB_SPEED_UNKNOWN;
59 : 0 : return speed_names[speed];
60 : : }
61 : : EXPORT_SYMBOL_GPL(usb_speed_string);
62 : :
63 : 0 : const char *usb_state_string(enum usb_device_state state)
64 : : {
65 : : static const char *const names[] = {
66 : : [USB_STATE_NOTATTACHED] = "not attached",
67 : : [USB_STATE_ATTACHED] = "attached",
68 : : [USB_STATE_POWERED] = "powered",
69 : : [USB_STATE_RECONNECTING] = "reconnecting",
70 : : [USB_STATE_UNAUTHENTICATED] = "unauthenticated",
71 : : [USB_STATE_DEFAULT] = "default",
72 : : [USB_STATE_ADDRESS] = "addresssed",
73 : : [USB_STATE_CONFIGURED] = "configured",
74 : : [USB_STATE_SUSPENDED] = "suspended",
75 : : };
76 : :
77 [ # # ]: 0 : if (state < 0 || state >= ARRAY_SIZE(names))
78 : : return "UNKNOWN";
79 : :
80 : 0 : return names[state];
81 : : }
82 : : EXPORT_SYMBOL_GPL(usb_state_string);
83 : :
84 : : #ifdef CONFIG_OF
85 : : static const char *const usb_dr_modes[] = {
86 : : [USB_DR_MODE_UNKNOWN] = "",
87 : : [USB_DR_MODE_HOST] = "host",
88 : : [USB_DR_MODE_PERIPHERAL] = "peripheral",
89 : : [USB_DR_MODE_OTG] = "otg",
90 : : };
91 : :
92 : : /**
93 : : * of_usb_get_dr_mode - Get dual role mode for given device_node
94 : : * @np: Pointer to the given device_node
95 : : *
96 : : * The function gets phy interface string from property 'dr_mode',
97 : : * and returns the correspondig enum usb_dr_mode
98 : : */
99 : 0 : enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
100 : : {
101 : : const char *dr_mode;
102 : : int err, i;
103 : :
104 : 0 : err = of_property_read_string(np, "dr_mode", &dr_mode);
105 [ # # ]: 0 : if (err < 0)
106 : : return USB_DR_MODE_UNKNOWN;
107 : :
108 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
109 [ # # ]: 0 : if (!strcmp(dr_mode, usb_dr_modes[i]))
110 : : return i;
111 : :
112 : : return USB_DR_MODE_UNKNOWN;
113 : : }
114 : : EXPORT_SYMBOL_GPL(of_usb_get_dr_mode);
115 : :
116 : : /**
117 : : * of_usb_get_maximum_speed - Get maximum requested speed for a given USB
118 : : * controller.
119 : : * @np: Pointer to the given device_node
120 : : *
121 : : * The function gets the maximum speed string from property "maximum-speed",
122 : : * and returns the corresponding enum usb_device_speed.
123 : : */
124 : 0 : enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np)
125 : : {
126 : : const char *maximum_speed;
127 : : int err;
128 : : int i;
129 : :
130 : 0 : err = of_property_read_string(np, "maximum-speed", &maximum_speed);
131 [ # # ]: 0 : if (err < 0)
132 : : return USB_SPEED_UNKNOWN;
133 : :
134 [ # # ]: 0 : for (i = 0; i < ARRAY_SIZE(speed_names); i++)
135 [ # # ]: 0 : if (strcmp(maximum_speed, speed_names[i]) == 0)
136 : : return i;
137 : :
138 : : return USB_SPEED_UNKNOWN;
139 : : }
140 : : EXPORT_SYMBOL_GPL(of_usb_get_maximum_speed);
141 : :
142 : : #endif
143 : :
144 : : MODULE_LICENSE("GPL");
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