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 <linux/libfdt.h>
11 #include <linux/usb/otg.h>
12 #include <linux/usb/ch9.h>
13
14 DECLARE_GLOBAL_DATA_PTR;
15
16 static const char *const usb_dr_modes[] = {
17 [USB_DR_MODE_UNKNOWN] = "",
18 [USB_DR_MODE_HOST] = "host",
19 [USB_DR_MODE_PERIPHERAL] = "peripheral",
20 [USB_DR_MODE_OTG] = "otg",
21 };
22
usb_get_dr_mode(int node)23 enum usb_dr_mode usb_get_dr_mode(int node)
24 {
25 const void *fdt = gd->fdt_blob;
26 const char *dr_mode;
27 int i;
28
29 dr_mode = fdt_getprop(fdt, node, "dr_mode", NULL);
30 if (!dr_mode) {
31 pr_err("usb dr_mode not found\n");
32 return USB_DR_MODE_UNKNOWN;
33 }
34
35 for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
36 if (!strcmp(dr_mode, usb_dr_modes[i]))
37 return i;
38
39 return USB_DR_MODE_UNKNOWN;
40 }
41
42 static const char *const speed_names[] = {
43 [USB_SPEED_UNKNOWN] = "UNKNOWN",
44 [USB_SPEED_LOW] = "low-speed",
45 [USB_SPEED_FULL] = "full-speed",
46 [USB_SPEED_HIGH] = "high-speed",
47 [USB_SPEED_WIRELESS] = "wireless",
48 [USB_SPEED_SUPER] = "super-speed",
49 };
50
usb_get_maximum_speed(int node)51 enum usb_device_speed usb_get_maximum_speed(int node)
52 {
53 const void *fdt = gd->fdt_blob;
54 const char *max_speed;
55 int i;
56
57 max_speed = fdt_getprop(fdt, node, "maximum-speed", NULL);
58 if (!max_speed) {
59 pr_err("usb maximum-speed not found\n");
60 return USB_SPEED_UNKNOWN;
61 }
62
63 for (i = 0; i < ARRAY_SIZE(speed_names); i++)
64 if (!strcmp(max_speed, speed_names[i]))
65 return i;
66
67 return USB_SPEED_UNKNOWN;
68 }
69