imx8-power-domain-legacy.c 9.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright 2017 NXP
  4. */
  5. #include <common.h>
  6. #include <dm.h>
  7. #include <log.h>
  8. #include <malloc.h>
  9. #include <power-domain-uclass.h>
  10. #include <asm/io.h>
  11. #include <asm/arch/power-domain.h>
  12. #include <dm/device-internal.h>
  13. #include <dm/device.h>
  14. #include <dm/uclass-internal.h>
  15. #include <asm/arch/sci/sci.h>
  16. DECLARE_GLOBAL_DATA_PTR;
  17. struct imx8_power_domain_priv {
  18. bool state_on;
  19. };
  20. static bool check_device_power_off(struct udevice *dev,
  21. const char *permanent_on_devices[],
  22. int size)
  23. {
  24. int i;
  25. for (i = 0; i < size; i++) {
  26. if (!strcmp(dev->name, permanent_on_devices[i]))
  27. return false;
  28. }
  29. return true;
  30. }
  31. void imx8_power_off_pd_devices(const char *permanent_on_devices[], int size)
  32. {
  33. struct udevice *dev;
  34. struct power_domain pd;
  35. for (uclass_find_first_device(UCLASS_POWER_DOMAIN, &dev); dev;
  36. uclass_find_next_device(&dev)) {
  37. if (!device_active(dev))
  38. continue;
  39. /*
  40. * Power off active pd devices except the permanent
  41. * power on devices
  42. */
  43. if (check_device_power_off(dev, permanent_on_devices, size)) {
  44. pd.dev = dev;
  45. power_domain_off(&pd);
  46. }
  47. }
  48. }
  49. int imx8_power_domain_lookup_name(const char *name,
  50. struct power_domain *power_domain)
  51. {
  52. struct udevice *dev;
  53. struct power_domain_ops *ops;
  54. int ret;
  55. debug("%s(power_domain=%p name=%s)\n", __func__, power_domain, name);
  56. ret = uclass_get_device_by_name(UCLASS_POWER_DOMAIN, name, &dev);
  57. if (ret) {
  58. printf("%s fail: %s, ret = %d\n", __func__, name, ret);
  59. return ret;
  60. }
  61. ops = (struct power_domain_ops *)dev->driver->ops;
  62. power_domain->dev = dev;
  63. ret = ops->request(power_domain);
  64. if (ret) {
  65. debug("ops->request() failed: %d\n", ret);
  66. return ret;
  67. }
  68. debug("%s ok: %s\n", __func__, dev->name);
  69. return 0;
  70. }
  71. static int imx8_power_domain_request(struct power_domain *power_domain)
  72. {
  73. debug("%s(power_domain=%p)\n", __func__, power_domain);
  74. return 0;
  75. }
  76. static int imx8_power_domain_free(struct power_domain *power_domain)
  77. {
  78. debug("%s(power_domain=%p)\n", __func__, power_domain);
  79. return 0;
  80. }
  81. static int imx8_power_domain_on(struct power_domain *power_domain)
  82. {
  83. struct udevice *dev = power_domain->dev;
  84. struct imx8_power_domain_platdata *pdata;
  85. struct imx8_power_domain_priv *ppriv;
  86. sc_err_t ret;
  87. int err;
  88. struct power_domain parent_domain;
  89. struct udevice *parent = dev_get_parent(dev);
  90. /* Need to power on parent node first */
  91. if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
  92. parent_domain.dev = parent;
  93. err = imx8_power_domain_on(&parent_domain);
  94. if (err)
  95. return err;
  96. }
  97. pdata = (struct imx8_power_domain_platdata *)dev_get_platdata(dev);
  98. ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
  99. debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name,
  100. pdata->resource_id);
  101. /* Already powered on */
  102. if (ppriv->state_on)
  103. return 0;
  104. if (pdata->resource_id != SC_R_NONE) {
  105. if (!sc_rm_is_resource_owned(-1, pdata->resource_id))
  106. printf("%s [%d] not owned by curr partition\n", dev->name, pdata->resource_id);
  107. ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
  108. SC_PM_PW_MODE_ON);
  109. if (ret) {
  110. printf("Error: %s Power up failed! (error = %d)\n",
  111. dev->name, ret);
  112. return -EIO;
  113. }
  114. }
  115. ppriv->state_on = true;
  116. debug("%s is powered on\n", dev->name);
  117. return 0;
  118. }
  119. static int imx8_power_domain_off_node(struct power_domain *power_domain)
  120. {
  121. struct udevice *dev = power_domain->dev;
  122. struct udevice *child;
  123. struct imx8_power_domain_priv *ppriv;
  124. struct imx8_power_domain_priv *child_ppriv;
  125. struct imx8_power_domain_platdata *pdata;
  126. sc_err_t ret;
  127. ppriv = dev_get_priv(dev);
  128. pdata = dev_get_platdata(dev);
  129. debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on);
  130. /* Already powered off */
  131. if (!ppriv->state_on)
  132. return 0;
  133. /* Check if all subnodes are off */
  134. for (device_find_first_child(dev, &child);
  135. child;
  136. device_find_next_child(&child)) {
  137. if (device_active(child)) {
  138. child_ppriv =
  139. (struct imx8_power_domain_priv *)dev_get_priv(child);
  140. if (child_ppriv->state_on)
  141. return -EPERM;
  142. }
  143. }
  144. if (pdata->resource_id != SC_R_NONE) {
  145. ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
  146. SC_PM_PW_MODE_OFF);
  147. if (ret) {
  148. if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) {
  149. printf("%s not owned by curr partition %d\n", dev->name, pdata->resource_id);
  150. return 0;
  151. }
  152. printf("Error: %s Power off failed! (error = %d)\n",
  153. dev->name, ret);
  154. return -EIO;
  155. }
  156. }
  157. ppriv->state_on = false;
  158. debug("%s is powered off\n", dev->name);
  159. return 0;
  160. }
  161. static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain)
  162. {
  163. struct udevice *dev = power_domain->dev;
  164. struct udevice *parent = dev_get_parent(dev);
  165. struct udevice *child;
  166. struct imx8_power_domain_priv *ppriv;
  167. struct imx8_power_domain_priv *child_ppriv;
  168. struct imx8_power_domain_platdata *pdata;
  169. sc_err_t ret;
  170. struct power_domain parent_pd;
  171. if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
  172. pdata =
  173. (struct imx8_power_domain_platdata *)dev_get_platdata(parent);
  174. ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent);
  175. debug("%s, %s, state_on %d\n", __func__, parent->name,
  176. ppriv->state_on);
  177. /* Already powered off */
  178. if (!ppriv->state_on)
  179. return 0;
  180. /*
  181. * Check if all sibling nodes are off. If yes,
  182. * power off parent
  183. */
  184. for (device_find_first_child(parent, &child); child;
  185. device_find_next_child(&child)) {
  186. if (device_active(child)) {
  187. child_ppriv = (struct imx8_power_domain_priv *)
  188. dev_get_priv(child);
  189. /* Find a power on sibling */
  190. if (child_ppriv->state_on) {
  191. debug("sibling %s, state_on %d\n",
  192. child->name,
  193. child_ppriv->state_on);
  194. return 0;
  195. }
  196. }
  197. }
  198. /* power off parent */
  199. if (pdata->resource_id != SC_R_NONE) {
  200. ret = sc_pm_set_resource_power_mode(-1,
  201. pdata->resource_id,
  202. SC_PM_PW_MODE_OFF);
  203. if (ret) {
  204. printf("%s Power off failed! (error = %d)\n",
  205. parent->name, ret);
  206. return -EIO;
  207. }
  208. }
  209. ppriv->state_on = false;
  210. debug("%s is powered off\n", parent->name);
  211. parent_pd.dev = parent;
  212. imx8_power_domain_off_parentnodes(&parent_pd);
  213. }
  214. return 0;
  215. }
  216. static int imx8_power_domain_off(struct power_domain *power_domain)
  217. {
  218. int ret;
  219. debug("%s(power_domain=%p)\n", __func__, power_domain);
  220. /* Turn off the node */
  221. ret = imx8_power_domain_off_node(power_domain);
  222. if (ret) {
  223. debug("Can't power off the node of dev %s, ret = %d\n",
  224. power_domain->dev->name, ret);
  225. return ret;
  226. }
  227. /* Turn off parent nodes, if sibling nodes are all off */
  228. ret = imx8_power_domain_off_parentnodes(power_domain);
  229. if (ret) {
  230. printf("Failed to power off parent nodes of dev %s, ret = %d\n",
  231. power_domain->dev->name, ret);
  232. return ret;
  233. }
  234. return 0;
  235. }
  236. static int imx8_power_domain_of_xlate(struct power_domain *power_domain,
  237. struct ofnode_phandle_args *args)
  238. {
  239. debug("%s(power_domain=%p)\n", __func__, power_domain);
  240. /* Do nothing to the xlate, since we don't have args used */
  241. return 0;
  242. }
  243. static int imx8_power_domain_bind(struct udevice *dev)
  244. {
  245. int offset;
  246. const char *name;
  247. int ret = 0;
  248. debug("%s(dev=%p)\n", __func__, dev);
  249. offset = dev_of_offset(dev);
  250. for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
  251. offset = fdt_next_subnode(gd->fdt_blob, offset)) {
  252. /* Bind the subnode to this driver */
  253. name = fdt_get_name(gd->fdt_blob, offset, NULL);
  254. ret = device_bind_with_driver_data(dev, dev->driver, name,
  255. dev->driver_data,
  256. offset_to_ofnode(offset),
  257. NULL);
  258. if (ret == -ENODEV)
  259. printf("Driver '%s' refuses to bind\n",
  260. dev->driver->name);
  261. if (ret)
  262. printf("Error binding driver '%s': %d\n",
  263. dev->driver->name, ret);
  264. }
  265. return 0;
  266. }
  267. static int imx8_power_domain_probe(struct udevice *dev)
  268. {
  269. struct imx8_power_domain_priv *ppriv;
  270. debug("%s(dev=%s)\n", __func__, dev->name);
  271. ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
  272. /* Set default to power off */
  273. if (ppriv)
  274. ppriv->state_on = false;
  275. return 0;
  276. }
  277. static int imx8_power_domain_ofdata_to_platdata(struct udevice *dev)
  278. {
  279. int reg;
  280. struct imx8_power_domain_platdata *pdata = dev_get_platdata(dev);
  281. reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1);
  282. if (reg == -1) {
  283. debug("%s: Invalid resource id %d\n", __func__, reg);
  284. return -EINVAL;
  285. }
  286. pdata->resource_id = (sc_rsrc_t)reg;
  287. debug("%s resource_id %d\n", __func__, pdata->resource_id);
  288. return 0;
  289. }
  290. static const struct udevice_id imx8_power_domain_ids[] = {
  291. { .compatible = "nxp,imx8-pd" },
  292. { }
  293. };
  294. struct power_domain_ops imx8_power_domain_ops = {
  295. .request = imx8_power_domain_request,
  296. .rfree = imx8_power_domain_free,
  297. .on = imx8_power_domain_on,
  298. .off = imx8_power_domain_off,
  299. .of_xlate = imx8_power_domain_of_xlate,
  300. };
  301. U_BOOT_DRIVER(imx8_power_domain) = {
  302. .name = "imx8_power_domain",
  303. .id = UCLASS_POWER_DOMAIN,
  304. .of_match = imx8_power_domain_ids,
  305. .bind = imx8_power_domain_bind,
  306. .probe = imx8_power_domain_probe,
  307. .ofdata_to_platdata = imx8_power_domain_ofdata_to_platdata,
  308. .platdata_auto_alloc_size = sizeof(struct imx8_power_domain_platdata),
  309. .priv_auto_alloc_size = sizeof(struct imx8_power_domain_priv),
  310. .ops = &imx8_power_domain_ops,
  311. .flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
  312. };