phy-uclass.c 6.1 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. #define LOG_CATEGORY UCLASS_PHY
  7. #include <common.h>
  8. #include <dm.h>
  9. #include <dm/device_compat.h>
  10. #include <dm/devres.h>
  11. #include <generic-phy.h>
  12. static inline struct phy_ops *phy_dev_ops(struct udevice *dev)
  13. {
  14. return (struct phy_ops *)dev->driver->ops;
  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. if (args->args_count > 1) {
  21. debug("Invaild args_count: %d\n", args->args_count);
  22. return -EINVAL;
  23. }
  24. if (args->args_count)
  25. phy->id = args->args[0];
  26. else
  27. phy->id = 0;
  28. return 0;
  29. }
  30. int generic_phy_get_by_index_nodev(ofnode node, int index, struct phy *phy)
  31. {
  32. struct ofnode_phandle_args args;
  33. struct phy_ops *ops;
  34. struct udevice *phydev;
  35. int i, ret;
  36. debug("%s(node=%s, index=%d, phy=%p)\n",
  37. __func__, ofnode_get_name(node), index, phy);
  38. assert(phy);
  39. phy->dev = NULL;
  40. ret = ofnode_parse_phandle_with_args(node, "phys", "#phy-cells", 0,
  41. index, &args);
  42. if (ret) {
  43. debug("%s: dev_read_phandle_with_args failed: err=%d\n",
  44. __func__, ret);
  45. return ret;
  46. }
  47. ret = uclass_get_device_by_ofnode(UCLASS_PHY, args.node, &phydev);
  48. if (ret) {
  49. debug("%s: uclass_get_device_by_ofnode failed: err=%d\n",
  50. __func__, ret);
  51. /* Check if args.node's parent is a PHY provider */
  52. ret = uclass_get_device_by_ofnode(UCLASS_PHY,
  53. ofnode_get_parent(args.node),
  54. &phydev);
  55. if (ret)
  56. return ret;
  57. /* insert phy idx at first position into args array */
  58. for (i = args.args_count; i >= 1 ; i--)
  59. args.args[i] = args.args[i - 1];
  60. args.args_count++;
  61. args.args[0] = ofnode_read_u32_default(args.node, "reg", -1);
  62. }
  63. phy->dev = phydev;
  64. ops = phy_dev_ops(phydev);
  65. if (ops->of_xlate)
  66. ret = ops->of_xlate(phy, &args);
  67. else
  68. ret = generic_phy_xlate_offs_flags(phy, &args);
  69. if (ret) {
  70. debug("of_xlate() failed: %d\n", ret);
  71. goto err;
  72. }
  73. return 0;
  74. err:
  75. return ret;
  76. }
  77. int generic_phy_get_by_index(struct udevice *dev, int index,
  78. struct phy *phy)
  79. {
  80. return generic_phy_get_by_index_nodev(dev_ofnode(dev), index, phy);
  81. }
  82. int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
  83. struct phy *phy)
  84. {
  85. int index;
  86. debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy);
  87. index = dev_read_stringlist_search(dev, "phy-names", phy_name);
  88. if (index < 0) {
  89. debug("dev_read_stringlist_search() failed: %d\n", index);
  90. return index;
  91. }
  92. return generic_phy_get_by_index(dev, index, phy);
  93. }
  94. int generic_phy_init(struct phy *phy)
  95. {
  96. struct phy_ops const *ops;
  97. int ret;
  98. if (!generic_phy_valid(phy))
  99. return 0;
  100. ops = phy_dev_ops(phy->dev);
  101. if (!ops->init)
  102. return 0;
  103. ret = ops->init(phy);
  104. if (ret)
  105. dev_err(phy->dev, "PHY: Failed to init %s: %d.\n",
  106. phy->dev->name, ret);
  107. return ret;
  108. }
  109. int generic_phy_reset(struct phy *phy)
  110. {
  111. struct phy_ops const *ops;
  112. int ret;
  113. if (!generic_phy_valid(phy))
  114. return 0;
  115. ops = phy_dev_ops(phy->dev);
  116. if (!ops->reset)
  117. return 0;
  118. ret = ops->reset(phy);
  119. if (ret)
  120. dev_err(phy->dev, "PHY: Failed to reset %s: %d.\n",
  121. phy->dev->name, ret);
  122. return ret;
  123. }
  124. int generic_phy_exit(struct phy *phy)
  125. {
  126. struct phy_ops const *ops;
  127. int ret;
  128. if (!generic_phy_valid(phy))
  129. return 0;
  130. ops = phy_dev_ops(phy->dev);
  131. if (!ops->exit)
  132. return 0;
  133. ret = ops->exit(phy);
  134. if (ret)
  135. dev_err(phy->dev, "PHY: Failed to exit %s: %d.\n",
  136. phy->dev->name, ret);
  137. return ret;
  138. }
  139. int generic_phy_power_on(struct phy *phy)
  140. {
  141. struct phy_ops const *ops;
  142. int ret;
  143. if (!generic_phy_valid(phy))
  144. return 0;
  145. ops = phy_dev_ops(phy->dev);
  146. if (!ops->power_on)
  147. return 0;
  148. ret = ops->power_on(phy);
  149. if (ret)
  150. dev_err(phy->dev, "PHY: Failed to power on %s: %d.\n",
  151. phy->dev->name, ret);
  152. return ret;
  153. }
  154. int generic_phy_power_off(struct phy *phy)
  155. {
  156. struct phy_ops const *ops;
  157. int ret;
  158. if (!generic_phy_valid(phy))
  159. return 0;
  160. ops = phy_dev_ops(phy->dev);
  161. if (!ops->power_off)
  162. return 0;
  163. ret = ops->power_off(phy);
  164. if (ret)
  165. dev_err(phy->dev, "PHY: Failed to power off %s: %d.\n",
  166. phy->dev->name, ret);
  167. return ret;
  168. }
  169. int generic_phy_configure(struct phy *phy, void *params)
  170. {
  171. struct phy_ops const *ops;
  172. if (!generic_phy_valid(phy))
  173. return 0;
  174. ops = phy_dev_ops(phy->dev);
  175. return ops->configure ? ops->configure(phy, params) : 0;
  176. }
  177. int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
  178. {
  179. int i, ret, count;
  180. bulk->count = 0;
  181. /* Return if no phy declared */
  182. if (!dev_read_prop(dev, "phys", NULL))
  183. return 0;
  184. count = dev_count_phandle_with_args(dev, "phys", "#phy-cells", 0);
  185. if (count < 1)
  186. return count;
  187. bulk->phys = devm_kcalloc(dev, count, sizeof(struct phy), GFP_KERNEL);
  188. if (!bulk->phys)
  189. return -ENOMEM;
  190. for (i = 0; i < count; i++) {
  191. ret = generic_phy_get_by_index(dev, i, &bulk->phys[i]);
  192. if (ret) {
  193. pr_err("Failed to get PHY%d for %s\n", i, dev->name);
  194. return ret;
  195. }
  196. bulk->count++;
  197. }
  198. return 0;
  199. }
  200. int generic_phy_init_bulk(struct phy_bulk *bulk)
  201. {
  202. struct phy *phys = bulk->phys;
  203. int i, ret;
  204. for (i = 0; i < bulk->count; i++) {
  205. ret = generic_phy_init(&phys[i]);
  206. if (ret) {
  207. pr_err("Can't init PHY%d\n", i);
  208. goto phys_init_err;
  209. }
  210. }
  211. return 0;
  212. phys_init_err:
  213. for (; i > 0; i--)
  214. generic_phy_exit(&phys[i - 1]);
  215. return ret;
  216. }
  217. int generic_phy_exit_bulk(struct phy_bulk *bulk)
  218. {
  219. struct phy *phys = bulk->phys;
  220. int i, ret = 0;
  221. for (i = 0; i < bulk->count; i++)
  222. ret |= generic_phy_exit(&phys[i]);
  223. return ret;
  224. }
  225. int generic_phy_power_on_bulk(struct phy_bulk *bulk)
  226. {
  227. struct phy *phys = bulk->phys;
  228. int i, ret;
  229. for (i = 0; i < bulk->count; i++) {
  230. ret = generic_phy_power_on(&phys[i]);
  231. if (ret) {
  232. pr_err("Can't power on PHY%d\n", i);
  233. goto phys_poweron_err;
  234. }
  235. }
  236. return 0;
  237. phys_poweron_err:
  238. for (; i > 0; i--)
  239. generic_phy_power_off(&phys[i - 1]);
  240. return ret;
  241. }
  242. int generic_phy_power_off_bulk(struct phy_bulk *bulk)
  243. {
  244. struct phy *phys = bulk->phys;
  245. int i, ret = 0;
  246. for (i = 0; i < bulk->count; i++)
  247. ret |= generic_phy_power_off(&phys[i]);
  248. return ret;
  249. }
  250. UCLASS_DRIVER(phy) = {
  251. .id = UCLASS_PHY,
  252. .name = "phy",
  253. };