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 <dm.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 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_err("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 43 static const char *const speed_names[] = { 44 [USB_SPEED_UNKNOWN] = "UNKNOWN", 45 [USB_SPEED_LOW] = "low-speed", 46 [USB_SPEED_FULL] = "full-speed", 47 [USB_SPEED_HIGH] = "high-speed", 48 [USB_SPEED_WIRELESS] = "wireless", 49 [USB_SPEED_SUPER] = "super-speed", 50 }; 51 52 const char *usb_speed_string(enum usb_device_speed speed) 53 { 54 if (speed < 0 || speed >= ARRAY_SIZE(speed_names)) 55 speed = USB_SPEED_UNKNOWN; 56 return speed_names[speed]; 57 } 58 59 enum usb_device_speed usb_get_maximum_speed(ofnode node) 60 { 61 const char *max_speed; 62 int i; 63 64 max_speed = ofnode_read_string(node, "maximum-speed"); 65 if (!max_speed) { 66 pr_err("usb maximum-speed not found\n"); 67 return USB_SPEED_UNKNOWN; 68 } 69 70 for (i = 0; i < ARRAY_SIZE(speed_names); i++) 71 if (!strcmp(max_speed, speed_names[i])) 72 return i; 73 74 return USB_SPEED_UNKNOWN; 75 } 76 77 #if CONFIG_IS_ENABLED(OF_LIVE) && CONFIG_IS_ENABLED(DM_USB) 78 static const char *const usbphy_modes[] = { 79 [USBPHY_INTERFACE_MODE_UNKNOWN] = "", 80 [USBPHY_INTERFACE_MODE_UTMI] = "utmi", 81 [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide", 82 }; 83 84 enum usb_phy_interface usb_get_phy_mode(ofnode node) 85 { 86 const char *phy_type; 87 int i; 88 89 phy_type = ofnode_get_property(node, "phy_type", NULL); 90 if (!phy_type) 91 return USBPHY_INTERFACE_MODE_UNKNOWN; 92 93 for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++) 94 if (!strcmp(phy_type, usbphy_modes[i])) 95 return i; 96 97 return USBPHY_INTERFACE_MODE_UNKNOWN; 98 } 99 #endif 100