imx8-power-domain-legacy.c 9.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385
  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/global_data.h>
  11. #include <asm/io.h>
  12. #include <asm/arch/power-domain.h>
  13. #include <dm/device-internal.h>
  14. #include <dm/device.h>
  15. #include <dm/uclass-internal.h>
  16. #include <asm/arch/sci/sci.h>
  17. DECLARE_GLOBAL_DATA_PTR;
  18. struct imx8_power_domain_priv {
  19. bool state_on;
  20. };
  21. static bool check_device_power_off(struct udevice *dev,
  22. const char *permanent_on_devices[],
  23. int size)
  24. {
  25. int i;
  26. for (i = 0; i < size; i++) {
  27. if (!strcmp(dev->name, permanent_on_devices[i]))
  28. return false;
  29. }
  30. return true;
  31. }
  32. void imx8_power_off_pd_devices(const char *permanent_on_devices[], int size)
  33. {
  34. struct udevice *dev;
  35. struct power_domain pd;
  36. for (uclass_find_first_device(UCLASS_POWER_DOMAIN, &dev); dev;
  37. uclass_find_next_device(&dev)) {
  38. if (!device_active(dev))
  39. continue;
  40. /*
  41. * Power off active pd devices except the permanent
  42. * power on devices
  43. */
  44. if (check_device_power_off(dev, permanent_on_devices, size)) {
  45. pd.dev = dev;
  46. power_domain_off(&pd);
  47. }
  48. }
  49. }
  50. int imx8_power_domain_lookup_name(const char *name,
  51. struct power_domain *power_domain)
  52. {
  53. struct udevice *dev;
  54. struct power_domain_ops *ops;
  55. int ret;
  56. debug("%s(power_domain=%p name=%s)\n", __func__, power_domain, name);
  57. ret = uclass_get_device_by_name(UCLASS_POWER_DOMAIN, name, &dev);
  58. if (ret) {
  59. printf("%s fail: %s, ret = %d\n", __func__, name, ret);
  60. return ret;
  61. }
  62. ops = (struct power_domain_ops *)dev->driver->ops;
  63. power_domain->dev = dev;
  64. ret = ops->request(power_domain);
  65. if (ret) {
  66. debug("ops->request() failed: %d\n", ret);
  67. return ret;
  68. }
  69. debug("%s ok: %s\n", __func__, dev->name);
  70. return 0;
  71. }
  72. static int imx8_power_domain_request(struct power_domain *power_domain)
  73. {
  74. debug("%s(power_domain=%p)\n", __func__, power_domain);
  75. return 0;
  76. }
  77. static int imx8_power_domain_free(struct power_domain *power_domain)
  78. {
  79. debug("%s(power_domain=%p)\n", __func__, power_domain);
  80. return 0;
  81. }
  82. static int imx8_power_domain_on(struct power_domain *power_domain)
  83. {
  84. struct udevice *dev = power_domain->dev;
  85. struct imx8_power_domain_plat *pdata;
  86. struct imx8_power_domain_priv *ppriv;
  87. sc_err_t ret;
  88. int err;
  89. struct power_domain parent_domain;
  90. struct udevice *parent = dev_get_parent(dev);
  91. /* Need to power on parent node first */
  92. if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
  93. parent_domain.dev = parent;
  94. err = imx8_power_domain_on(&parent_domain);
  95. if (err)
  96. return err;
  97. }
  98. pdata = (struct imx8_power_domain_plat *)dev_get_plat(dev);
  99. ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
  100. debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name,
  101. pdata->resource_id);
  102. /* Already powered on */
  103. if (ppriv->state_on)
  104. return 0;
  105. if (pdata->resource_id != SC_R_NONE) {
  106. if (!sc_rm_is_resource_owned(-1, pdata->resource_id))
  107. printf("%s [%d] not owned by curr partition\n", dev->name, pdata->resource_id);
  108. ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
  109. SC_PM_PW_MODE_ON);
  110. if (ret) {
  111. printf("Error: %s Power up failed! (error = %d)\n",
  112. dev->name, ret);
  113. return -EIO;
  114. }
  115. }
  116. ppriv->state_on = true;
  117. debug("%s is powered on\n", dev->name);
  118. return 0;
  119. }
  120. static int imx8_power_domain_off_node(struct power_domain *power_domain)
  121. {
  122. struct udevice *dev = power_domain->dev;
  123. struct udevice *child;
  124. struct imx8_power_domain_priv *ppriv;
  125. struct imx8_power_domain_priv *child_ppriv;
  126. struct imx8_power_domain_plat *pdata;
  127. sc_err_t ret;
  128. ppriv = dev_get_priv(dev);
  129. pdata = dev_get_plat(dev);
  130. debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on);
  131. /* Already powered off */
  132. if (!ppriv->state_on)
  133. return 0;
  134. /* Check if all subnodes are off */
  135. for (device_find_first_child(dev, &child);
  136. child;
  137. device_find_next_child(&child)) {
  138. if (device_active(child)) {
  139. child_ppriv =
  140. (struct imx8_power_domain_priv *)dev_get_priv(child);
  141. if (child_ppriv->state_on)
  142. return -EPERM;
  143. }
  144. }
  145. if (pdata->resource_id != SC_R_NONE) {
  146. ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
  147. SC_PM_PW_MODE_OFF);
  148. if (ret) {
  149. if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) {
  150. printf("%s not owned by curr partition %d\n", dev->name, pdata->resource_id);
  151. return 0;
  152. }
  153. printf("Error: %s Power off failed! (error = %d)\n",
  154. dev->name, ret);
  155. return -EIO;
  156. }
  157. }
  158. ppriv->state_on = false;
  159. debug("%s is powered off\n", dev->name);
  160. return 0;
  161. }
  162. static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain)
  163. {
  164. struct udevice *dev = power_domain->dev;
  165. struct udevice *parent = dev_get_parent(dev);
  166. struct udevice *child;
  167. struct imx8_power_domain_priv *ppriv;
  168. struct imx8_power_domain_priv *child_ppriv;
  169. struct imx8_power_domain_plat *pdata;
  170. sc_err_t ret;
  171. struct power_domain parent_pd;
  172. if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
  173. pdata =
  174. (struct imx8_power_domain_plat *)dev_get_plat(parent);
  175. ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent);
  176. debug("%s, %s, state_on %d\n", __func__, parent->name,
  177. ppriv->state_on);
  178. /* Already powered off */
  179. if (!ppriv->state_on)
  180. return 0;
  181. /*
  182. * Check if all sibling nodes are off. If yes,
  183. * power off parent
  184. */
  185. for (device_find_first_child(parent, &child); child;
  186. device_find_next_child(&child)) {
  187. if (device_active(child)) {
  188. child_ppriv = (struct imx8_power_domain_priv *)
  189. dev_get_priv(child);
  190. /* Find a power on sibling */
  191. if (child_ppriv->state_on) {
  192. debug("sibling %s, state_on %d\n",
  193. child->name,
  194. child_ppriv->state_on);
  195. return 0;
  196. }
  197. }
  198. }
  199. /* power off parent */
  200. if (pdata->resource_id != SC_R_NONE) {
  201. ret = sc_pm_set_resource_power_mode(-1,
  202. pdata->resource_id,
  203. SC_PM_PW_MODE_OFF);
  204. if (ret) {
  205. printf("%s Power off failed! (error = %d)\n",
  206. parent->name, ret);
  207. return -EIO;
  208. }
  209. }
  210. ppriv->state_on = false;
  211. debug("%s is powered off\n", parent->name);
  212. parent_pd.dev = parent;
  213. imx8_power_domain_off_parentnodes(&parent_pd);
  214. }
  215. return 0;
  216. }
  217. static int imx8_power_domain_off(struct power_domain *power_domain)
  218. {
  219. int ret;
  220. debug("%s(power_domain=%p)\n", __func__, power_domain);
  221. /* Turn off the node */
  222. ret = imx8_power_domain_off_node(power_domain);
  223. if (ret) {
  224. debug("Can't power off the node of dev %s, ret = %d\n",
  225. power_domain->dev->name, ret);
  226. return ret;
  227. }
  228. /* Turn off parent nodes, if sibling nodes are all off */
  229. ret = imx8_power_domain_off_parentnodes(power_domain);
  230. if (ret) {
  231. printf("Failed to power off parent nodes of dev %s, ret = %d\n",
  232. power_domain->dev->name, ret);
  233. return ret;
  234. }
  235. return 0;
  236. }
  237. static int imx8_power_domain_of_xlate(struct power_domain *power_domain,
  238. struct ofnode_phandle_args *args)
  239. {
  240. debug("%s(power_domain=%p)\n", __func__, power_domain);
  241. /* Do nothing to the xlate, since we don't have args used */
  242. return 0;
  243. }
  244. static int imx8_power_domain_bind(struct udevice *dev)
  245. {
  246. int offset;
  247. const char *name;
  248. int ret = 0;
  249. debug("%s(dev=%p)\n", __func__, dev);
  250. offset = dev_of_offset(dev);
  251. for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
  252. offset = fdt_next_subnode(gd->fdt_blob, offset)) {
  253. /* Bind the subnode to this driver */
  254. name = fdt_get_name(gd->fdt_blob, offset, NULL);
  255. ret = device_bind_with_driver_data(dev, dev->driver, name,
  256. dev->driver_data,
  257. offset_to_ofnode(offset),
  258. NULL);
  259. if (ret == -ENODEV)
  260. printf("Driver '%s' refuses to bind\n",
  261. dev->driver->name);
  262. if (ret)
  263. printf("Error binding driver '%s': %d\n",
  264. dev->driver->name, ret);
  265. }
  266. return 0;
  267. }
  268. static int imx8_power_domain_probe(struct udevice *dev)
  269. {
  270. struct imx8_power_domain_priv *ppriv;
  271. debug("%s(dev=%s)\n", __func__, dev->name);
  272. ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
  273. /* Set default to power off */
  274. if (ppriv)
  275. ppriv->state_on = false;
  276. return 0;
  277. }
  278. static int imx8_power_domain_of_to_plat(struct udevice *dev)
  279. {
  280. int reg;
  281. struct imx8_power_domain_plat *pdata = dev_get_plat(dev);
  282. reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1);
  283. if (reg == -1) {
  284. debug("%s: Invalid resource id %d\n", __func__, reg);
  285. return -EINVAL;
  286. }
  287. pdata->resource_id = (sc_rsrc_t)reg;
  288. debug("%s resource_id %d\n", __func__, pdata->resource_id);
  289. return 0;
  290. }
  291. static const struct udevice_id imx8_power_domain_ids[] = {
  292. { .compatible = "nxp,imx8-pd" },
  293. { }
  294. };
  295. struct power_domain_ops imx8_power_domain_ops = {
  296. .request = imx8_power_domain_request,
  297. .rfree = imx8_power_domain_free,
  298. .on = imx8_power_domain_on,
  299. .off = imx8_power_domain_off,
  300. .of_xlate = imx8_power_domain_of_xlate,
  301. };
  302. U_BOOT_DRIVER(imx8_power_domain) = {
  303. .name = "imx8_power_domain",
  304. .id = UCLASS_POWER_DOMAIN,
  305. .of_match = imx8_power_domain_ids,
  306. .bind = imx8_power_domain_bind,
  307. .probe = imx8_power_domain_probe,
  308. .of_to_plat = imx8_power_domain_of_to_plat,
  309. .plat_auto = sizeof(struct imx8_power_domain_plat),
  310. .priv_auto = sizeof(struct imx8_power_domain_priv),
  311. .ops = &imx8_power_domain_ops,
  312. .flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
  313. };