mdio-uclass.c 2.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2019
  4. * Alex Marginean, NXP
  5. */
  6. #include <common.h>
  7. #include <dm.h>
  8. #include <miiphy.h>
  9. #include <dm/device-internal.h>
  10. #include <dm/uclass-internal.h>
  11. void dm_mdio_probe_devices(void)
  12. {
  13. struct udevice *it;
  14. struct uclass *uc;
  15. uclass_get(UCLASS_MDIO, &uc);
  16. uclass_foreach_dev(it, uc) {
  17. device_probe(it);
  18. }
  19. }
  20. static int dm_mdio_post_bind(struct udevice *dev)
  21. {
  22. const char *dt_name;
  23. /* set a custom name for the MDIO device, if present in DT */
  24. if (ofnode_valid(dev->node)) {
  25. dt_name = ofnode_read_string(dev->node, "device-name");
  26. if (dt_name) {
  27. debug("renaming dev %s to %s\n", dev->name, dt_name);
  28. device_set_name(dev, dt_name);
  29. }
  30. }
  31. /*
  32. * MDIO command doesn't like spaces in names, don't allow them to keep
  33. * it happy
  34. */
  35. if (strchr(dev->name, ' ')) {
  36. debug("\nError: MDIO device name \"%s\" has a space!\n",
  37. dev->name);
  38. return -EINVAL;
  39. }
  40. return 0;
  41. }
  42. /*
  43. * Following read/write/reset functions are registered with legacy MII code.
  44. * These are called for PHY operations by upper layers and we further call the
  45. * DM MDIO driver functions.
  46. */
  47. static int mdio_read(struct mii_dev *mii_bus, int addr, int devad, int reg)
  48. {
  49. struct udevice *dev = mii_bus->priv;
  50. return mdio_get_ops(dev)->read(dev, addr, devad, reg);
  51. }
  52. static int mdio_write(struct mii_dev *mii_bus, int addr, int devad, int reg,
  53. u16 val)
  54. {
  55. struct udevice *dev = mii_bus->priv;
  56. return mdio_get_ops(dev)->write(dev, addr, devad, reg, val);
  57. }
  58. static int mdio_reset(struct mii_dev *mii_bus)
  59. {
  60. struct udevice *dev = mii_bus->priv;
  61. if (mdio_get_ops(dev)->reset)
  62. return mdio_get_ops(dev)->reset(dev);
  63. else
  64. return 0;
  65. }
  66. static int dm_mdio_post_probe(struct udevice *dev)
  67. {
  68. struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
  69. pdata->mii_bus = mdio_alloc();
  70. pdata->mii_bus->read = mdio_read;
  71. pdata->mii_bus->write = mdio_write;
  72. pdata->mii_bus->reset = mdio_reset;
  73. pdata->mii_bus->priv = dev;
  74. strncpy(pdata->mii_bus->name, dev->name, MDIO_NAME_LEN - 1);
  75. return mdio_register(pdata->mii_bus);
  76. }
  77. static int dm_mdio_pre_remove(struct udevice *dev)
  78. {
  79. struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
  80. struct mdio_ops *ops = mdio_get_ops(dev);
  81. if (ops->reset)
  82. ops->reset(dev);
  83. mdio_unregister(pdata->mii_bus);
  84. mdio_free(pdata->mii_bus);
  85. return 0;
  86. }
  87. struct phy_device *dm_mdio_phy_connect(struct udevice *dev, int addr,
  88. struct udevice *ethdev,
  89. phy_interface_t interface)
  90. {
  91. struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
  92. if (device_probe(dev))
  93. return 0;
  94. return phy_connect(pdata->mii_bus, addr, ethdev, interface);
  95. }
  96. UCLASS_DRIVER(mdio) = {
  97. .id = UCLASS_MDIO,
  98. .name = "mdio",
  99. .post_bind = dm_mdio_post_bind,
  100. .post_probe = dm_mdio_post_probe,
  101. .pre_remove = dm_mdio_pre_remove,
  102. .per_device_auto_alloc_size = sizeof(struct mdio_perdev_priv),
  103. };