drivers/phy/phy-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
   4  * Written by Jean-Jacques Hiblot  <jjhiblot@ti.com>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <generic-phy.h>
  10
  11 static inline struct phy_ops *phy_dev_ops(struct udevice *dev)
  12 {
  13         return (struct phy_ops *)dev->driver->ops;
  14 }
  15
  16 static int generic_phy_xlate_offs_flags(struct phy *phy,
  17                                         struct ofnode_phandle_args *args)
  18 {
  19         debug("%s(phy=%p)\n", __func__, phy);
  20
  21         if (args->args_count > 1) {
  22                 debug("Invaild args_count: %d\n", args->args_count);
  23                 return -EINVAL;
  24         }
  25
  26         if (args->args_count)
  27                 phy->id = args->args[0];
  28         else
  29                 phy->id = 0;
  30
  31         return 0;
  32 }
  33
  34 int generic_phy_get_by_index(struct udevice *dev, int index,
  35                              struct phy *phy)
  36 {
  37         struct ofnode_phandle_args args;
  38         struct phy_ops *ops;
  39         struct udevice *phydev;
  40         int i, ret;
  41
  42         debug("%s(dev=%p, index=%d, phy=%p)\n", __func__, dev, index, phy);
  43
  44         assert(phy);
  45         phy->dev = NULL;
  46         ret = dev_read_phandle_with_args(dev, "phys", "#phy-cells", 0, index,
  47                                          &args);
  48         if (ret) {
  49                 debug("%s: dev_read_phandle_with_args failed: err=%d\n",
  50                       __func__, ret);
  51                 return ret;
  52         }
  53
  54         ret = uclass_get_device_by_ofnode(UCLASS_PHY, args.node, &phydev);
  55         if (ret) {
  56                 debug("%s: uclass_get_device_by_ofnode failed: err=%d\n",
  57                       __func__, ret);
  58
  59                 /* Check if args.node's parent is a PHY provider */
  60                 ret = uclass_get_device_by_ofnode(UCLASS_PHY,
  61                                                   ofnode_get_parent(args.node),
  62                                                   &phydev);
  63                 if (ret)
  64                         return ret;
  65
  66                 /* insert phy idx at first position into args array */
  67                 for (i = args.args_count; i >= 1 ; i--)
  68                         args.args[i] = args.args[i - 1];
  69
  70                 args.args_count++;
  71                 args.args[0] = ofnode_read_u32_default(args.node, "reg", -1);
  72         }
  73
  74         phy->dev = phydev;
  75
  76         ops = phy_dev_ops(phydev);
  77
  78         if (ops->of_xlate)
  79                 ret = ops->of_xlate(phy, &args);
  80         else
  81                 ret = generic_phy_xlate_offs_flags(phy, &args);
  82         if (ret) {
  83                 debug("of_xlate() failed: %d\n", ret);
  84                 goto err;
  85         }
  86
  87         return 0;
  88
  89 err:
  90         return ret;
  91 }
  92
  93 int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
  94                             struct phy *phy)
  95 {
  96         int index;
  97
  98         debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy);
  99
 100         index = dev_read_stringlist_search(dev, "phy-names", phy_name);
 101         if (index < 0) {
 102                 debug("dev_read_stringlist_search() failed: %d\n", index);
 103                 return index;
 104         }
 105
 106         return generic_phy_get_by_index(dev, index, phy);
 107 }
 108
 109 int generic_phy_init(struct phy *phy)
 110 {
 111         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 112
 113         return ops->init ? ops->init(phy) : 0;
 114 }
 115
 116 int generic_phy_reset(struct phy *phy)
 117 {
 118         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 119
 120         return ops->reset ? ops->reset(phy) : 0;
 121 }
 122
 123 int generic_phy_exit(struct phy *phy)
 124 {
 125         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 126
 127         return ops->exit ? ops->exit(phy) : 0;
 128 }
 129
 130 int generic_phy_power_on(struct phy *phy)
 131 {
 132         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 133
 134         return ops->power_on ? ops->power_on(phy) : 0;
 135 }
 136
 137 int generic_phy_power_off(struct phy *phy)
 138 {
 139         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 140
 141         return ops->power_off ? ops->power_off(phy) : 0;
 142 }
 143
 144 UCLASS_DRIVER(phy) = {
 145         .id             = UCLASS_PHY,
 146         .name           = "phy",
 147 };