phy-uclass.c 5.9 KB

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  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. #include <common.h>
  7. #include <dm.h>
  8. #include <dm/devres.h>
  9. #include <generic-phy.h>
  10. #include <log.h>
  11. static inline struct phy_ops *phy_dev_ops(struct udevice *dev)
  12. {
  13. return (struct phy_ops *)dev->driver->ops;
  14. }
  15. static int generic_phy_xlate_offs_flags(struct phy *phy,
  16. struct ofnode_phandle_args *args)
  17. {
  18. debug("%s(phy=%p)\n", __func__, phy);
  19. if (args->args_count > 1) {
  20. debug("Invaild args_count: %d\n", args->args_count);
  21. return -EINVAL;
  22. }
  23. if (args->args_count)
  24. phy->id = args->args[0];
  25. else
  26. phy->id = 0;
  27. return 0;
  28. }
  29. int generic_phy_get_by_index_nodev(ofnode node, int index, struct phy *phy)
  30. {
  31. struct ofnode_phandle_args args;
  32. struct phy_ops *ops;
  33. struct udevice *phydev;
  34. int i, ret;
  35. debug("%s(node=%s, index=%d, phy=%p)\n",
  36. __func__, ofnode_get_name(node), index, phy);
  37. assert(phy);
  38. phy->dev = NULL;
  39. ret = ofnode_parse_phandle_with_args(node, "phys", "#phy-cells", 0,
  40. index, &args);
  41. if (ret) {
  42. debug("%s: dev_read_phandle_with_args failed: err=%d\n",
  43. __func__, ret);
  44. return ret;
  45. }
  46. ret = uclass_get_device_by_ofnode(UCLASS_PHY, args.node, &phydev);
  47. if (ret) {
  48. debug("%s: uclass_get_device_by_ofnode failed: err=%d\n",
  49. __func__, ret);
  50. /* Check if args.node's parent is a PHY provider */
  51. ret = uclass_get_device_by_ofnode(UCLASS_PHY,
  52. ofnode_get_parent(args.node),
  53. &phydev);
  54. if (ret)
  55. return ret;
  56. /* insert phy idx at first position into args array */
  57. for (i = args.args_count; i >= 1 ; i--)
  58. args.args[i] = args.args[i - 1];
  59. args.args_count++;
  60. args.args[0] = ofnode_read_u32_default(args.node, "reg", -1);
  61. }
  62. phy->dev = phydev;
  63. ops = phy_dev_ops(phydev);
  64. if (ops->of_xlate)
  65. ret = ops->of_xlate(phy, &args);
  66. else
  67. ret = generic_phy_xlate_offs_flags(phy, &args);
  68. if (ret) {
  69. debug("of_xlate() failed: %d\n", ret);
  70. goto err;
  71. }
  72. return 0;
  73. err:
  74. return ret;
  75. }
  76. int generic_phy_get_by_index(struct udevice *dev, int index,
  77. struct phy *phy)
  78. {
  79. return generic_phy_get_by_index_nodev(dev_ofnode(dev), index, phy);
  80. }
  81. int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
  82. struct phy *phy)
  83. {
  84. int index;
  85. debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy);
  86. index = dev_read_stringlist_search(dev, "phy-names", phy_name);
  87. if (index < 0) {
  88. debug("dev_read_stringlist_search() failed: %d\n", index);
  89. return index;
  90. }
  91. return generic_phy_get_by_index(dev, index, phy);
  92. }
  93. int generic_phy_init(struct phy *phy)
  94. {
  95. struct phy_ops const *ops;
  96. int ret;
  97. if (!generic_phy_valid(phy))
  98. return 0;
  99. ops = phy_dev_ops(phy->dev);
  100. if (!ops->init)
  101. return 0;
  102. ret = ops->init(phy);
  103. if (ret)
  104. dev_err(phy->dev, "PHY: Failed to init %s: %d.\n",
  105. phy->dev->name, ret);
  106. return ret;
  107. }
  108. int generic_phy_reset(struct phy *phy)
  109. {
  110. struct phy_ops const *ops;
  111. int ret;
  112. if (!generic_phy_valid(phy))
  113. return 0;
  114. ops = phy_dev_ops(phy->dev);
  115. if (!ops->reset)
  116. return 0;
  117. ret = ops->reset(phy);
  118. if (ret)
  119. dev_err(phy->dev, "PHY: Failed to reset %s: %d.\n",
  120. phy->dev->name, ret);
  121. return ret;
  122. }
  123. int generic_phy_exit(struct phy *phy)
  124. {
  125. struct phy_ops const *ops;
  126. int ret;
  127. if (!generic_phy_valid(phy))
  128. return 0;
  129. ops = phy_dev_ops(phy->dev);
  130. if (!ops->exit)
  131. return 0;
  132. ret = ops->exit(phy);
  133. if (ret)
  134. dev_err(phy->dev, "PHY: Failed to exit %s: %d.\n",
  135. phy->dev->name, ret);
  136. return ret;
  137. }
  138. int generic_phy_power_on(struct phy *phy)
  139. {
  140. struct phy_ops const *ops;
  141. int ret;
  142. if (!generic_phy_valid(phy))
  143. return 0;
  144. ops = phy_dev_ops(phy->dev);
  145. if (!ops->power_on)
  146. return 0;
  147. ret = ops->power_on(phy);
  148. if (ret)
  149. dev_err(phy->dev, "PHY: Failed to power on %s: %d.\n",
  150. phy->dev->name, ret);
  151. return ret;
  152. }
  153. int generic_phy_power_off(struct phy *phy)
  154. {
  155. struct phy_ops const *ops;
  156. int ret;
  157. if (!generic_phy_valid(phy))
  158. return 0;
  159. ops = phy_dev_ops(phy->dev);
  160. if (!ops->power_off)
  161. return 0;
  162. ret = ops->power_off(phy);
  163. if (ret)
  164. dev_err(phy->dev, "PHY: Failed to power off %s: %d.\n",
  165. phy->dev->name, ret);
  166. return ret;
  167. }
  168. int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
  169. {
  170. int i, ret, count;
  171. bulk->count = 0;
  172. /* Return if no phy declared */
  173. if (!dev_read_prop(dev, "phys", NULL))
  174. return 0;
  175. count = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
  176. if (count < 1)
  177. return count;
  178. bulk->phys = devm_kcalloc(dev, count, sizeof(struct phy), GFP_KERNEL);
  179. if (!bulk->phys)
  180. return -ENOMEM;
  181. for (i = 0; i < count; i++) {
  182. ret = generic_phy_get_by_index(dev, i, &bulk->phys[i]);
  183. if (ret) {
  184. pr_err("Failed to get PHY%d for %s\n", i, dev->name);
  185. return ret;
  186. }
  187. bulk->count++;
  188. }
  189. return 0;
  190. }
  191. int generic_phy_init_bulk(struct phy_bulk *bulk)
  192. {
  193. struct phy *phys = bulk->phys;
  194. int i, ret;
  195. for (i = 0; i < bulk->count; i++) {
  196. ret = generic_phy_init(&phys[i]);
  197. if (ret) {
  198. pr_err("Can't init PHY%d\n", i);
  199. goto phys_init_err;
  200. }
  201. }
  202. return 0;
  203. phys_init_err:
  204. for (; i > 0; i--)
  205. generic_phy_exit(&phys[i - 1]);
  206. return ret;
  207. }
  208. int generic_phy_exit_bulk(struct phy_bulk *bulk)
  209. {
  210. struct phy *phys = bulk->phys;
  211. int i, ret = 0;
  212. for (i = 0; i < bulk->count; i++)
  213. ret |= generic_phy_exit(&phys[i]);
  214. return ret;
  215. }
  216. int generic_phy_power_on_bulk(struct phy_bulk *bulk)
  217. {
  218. struct phy *phys = bulk->phys;
  219. int i, ret;
  220. for (i = 0; i < bulk->count; i++) {
  221. ret = generic_phy_power_on(&phys[i]);
  222. if (ret) {
  223. pr_err("Can't power on PHY%d\n", i);
  224. goto phys_poweron_err;
  225. }
  226. }
  227. return 0;
  228. phys_poweron_err:
  229. for (; i > 0; i--)
  230. generic_phy_power_off(&phys[i - 1]);
  231. return ret;
  232. }
  233. int generic_phy_power_off_bulk(struct phy_bulk *bulk)
  234. {
  235. struct phy *phys = bulk->phys;
  236. int i, ret = 0;
  237. for (i = 0; i < bulk->count; i++)
  238. ret |= generic_phy_power_off(&phys[i]);
  239. return ret;
  240. }
  241. UCLASS_DRIVER(phy) = {
  242. .id = UCLASS_PHY,
  243. .name = "phy",
  244. };