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 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 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