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_node(ofnode node, int index, struct phy *phy)
  35 {
  36         struct ofnode_phandle_args args;
  37         struct phy_ops *ops;
  38         struct udevice *phydev;
  39         int i, ret;
  40
  41         debug("%s(node=%s, index=%d, phy=%p)\n",
  42               __func__, ofnode_get_name(node), index, phy);
  43
  44         assert(phy);
  45         phy->dev = NULL;
  46         ret = ofnode_parse_phandle_with_args(node, "phys", "#phy-cells", 0,
  47                                              index, &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_index(struct udevice *dev, int index,
  94                              struct phy *phy)
  95 {
  96         return generic_phy_get_by_node(dev_ofnode(dev), index, phy);
  97 }
  98
  99 int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
 100                             struct phy *phy)
 101 {
 102         int index;
 103
 104         debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy);
 105
 106         index = dev_read_stringlist_search(dev, "phy-names", phy_name);
 107         if (index < 0) {
 108                 debug("dev_read_stringlist_search() failed: %d\n", index);
 109                 return index;
 110         }
 111
 112         return generic_phy_get_by_index(dev, index, phy);
 113 }
 114
 115 int generic_phy_init(struct phy *phy)
 116 {
 117         struct phy_ops const *ops;
 118
 119         if (!phy)
 120                 return 0;
 121         ops = phy_dev_ops(phy->dev);
 122
 123         return ops->init ? ops->init(phy) : 0;
 124 }
 125
 126 int generic_phy_reset(struct phy *phy)
 127 {
 128         struct phy_ops const *ops;
 129
 130         if (!phy)
 131                 return 0;
 132         ops = phy_dev_ops(phy->dev);
 133
 134         return ops->reset ? ops->reset(phy) : 0;
 135 }
 136
 137 int generic_phy_exit(struct phy *phy)
 138 {
 139         struct phy_ops const *ops;
 140
 141         if (!phy)
 142                 return 0;
 143         ops = phy_dev_ops(phy->dev);
 144
 145         return ops->exit ? ops->exit(phy) : 0;
 146 }
 147
 148 int generic_phy_power_on(struct phy *phy)
 149 {
 150         struct phy_ops const *ops;
 151
 152         if (!phy)
 153                 return 0;
 154         ops = phy_dev_ops(phy->dev);
 155
 156         return ops->power_on ? ops->power_on(phy) : 0;
 157 }
 158
 159 int generic_phy_power_off(struct phy *phy)
 160 {
 161         struct phy_ops const *ops;
 162
 163         if (!phy)
 164                 return 0;
 165         ops = phy_dev_ops(phy->dev);
 166
 167         return ops->power_off ? ops->power_off(phy) : 0;
 168 }
 169
 170 UCLASS_DRIVER(phy) = {
 171         .id             = UCLASS_PHY,
 172         .name           = "phy",
 173 };