1 /* 2 * Provides code common for host and device side USB. 3 * 4 * (C) Copyright 2016 5 * Texas Instruments Incorporated, <www.ti.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <linux/libfdt.h> 12 #include <linux/usb/otg.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