drivers/usb/common/common.c

   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 <dm.h>
  11 #include <linux/usb/otg.h>
  12 #include <linux/usb/ch9.h>
  13 #include <linux/usb/phy.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 static const char *const usb_dr_modes[] = {
  18         [USB_DR_MODE_UNKNOWN]           = "",
  19         [USB_DR_MODE_HOST]              = "host",
  20         [USB_DR_MODE_PERIPHERAL]        = "peripheral",
  21         [USB_DR_MODE_OTG]               = "otg",
  22 };
  23
  24 enum usb_dr_mode usb_get_dr_mode(ofnode node)
  25 {
  26         const char *dr_mode;
  27         int i;
  28
  29         dr_mode = ofnode_read_string(node, "dr_mode");
  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(ofnode node)
  52 {
  53         const char *max_speed;
  54         int i;
  55
  56         max_speed = ofnode_read_string(node, "maximum-speed");
  57         if (!max_speed) {
  58                 pr_err("usb maximum-speed not found\n");
  59                 return USB_SPEED_UNKNOWN;
  60         }
  61
  62         for (i = 0; i < ARRAY_SIZE(speed_names); i++)
  63                 if (!strcmp(max_speed, speed_names[i]))
  64                         return i;
  65
  66         return USB_SPEED_UNKNOWN;
  67 }
  68
  69 #if CONFIG_IS_ENABLED(DM_USB)
  70 static const char *const usbphy_modes[] = {
  71         [USBPHY_INTERFACE_MODE_UNKNOWN] = "",
  72         [USBPHY_INTERFACE_MODE_UTMI]    = "utmi",
  73         [USBPHY_INTERFACE_MODE_UTMIW]   = "utmi_wide",
  74 };
  75
  76 enum usb_phy_interface usb_get_phy_mode(ofnode node)
  77 {
  78         const char *phy_type;
  79         int i;
  80
  81         phy_type = ofnode_get_property(node, "phy_type", NULL);
  82         if (!phy_type)
  83                 return USBPHY_INTERFACE_MODE_UNKNOWN;
  84
  85         for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
  86                 if (!strcmp(phy_type, usbphy_modes[i]))
  87                         return i;
  88
  89         return USBPHY_INTERFACE_MODE_UNKNOWN;
  90 }
  91 #endif