gpio.c 15 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2013 Google, Inc
  4. */
  5. #include <common.h>
  6. #include <fdtdec.h>
  7. #include <dm.h>
  8. #include <log.h>
  9. #include <malloc.h>
  10. #include <dm/root.h>
  11. #include <dm/test.h>
  12. #include <dm/util.h>
  13. #include <asm/gpio.h>
  14. #include <test/ut.h>
  15. /* Test that sandbox GPIOs work correctly */
  16. static int dm_test_gpio(struct unit_test_state *uts)
  17. {
  18. unsigned int offset, gpio;
  19. struct dm_gpio_ops *ops;
  20. struct udevice *dev;
  21. struct gpio_desc *desc;
  22. const char *name;
  23. int offset_count;
  24. char buf[80];
  25. /*
  26. * We expect to get 4 banks. One is anonymous (just numbered) and
  27. * comes from platdata. The other are named a (20 gpios),
  28. * b (10 gpios) and c (10 gpios) and come from the device tree. See
  29. * test/dm/test.dts.
  30. */
  31. ut_assertok(gpio_lookup_name("b4", &dev, &offset, &gpio));
  32. ut_asserteq_str(dev->name, "extra-gpios");
  33. ut_asserteq(4, offset);
  34. ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 20 + 4, gpio);
  35. name = gpio_get_bank_info(dev, &offset_count);
  36. ut_asserteq_str("b", name);
  37. ut_asserteq(10, offset_count);
  38. /* Get the operations for this device */
  39. ops = gpio_get_ops(dev);
  40. ut_assert(ops->get_function);
  41. /* Cannot get a value until it is reserved */
  42. ut_asserteq(-EBUSY, gpio_get_value(gpio + 1));
  43. /*
  44. * Now some tests that use the 'sandbox' back door. All GPIOs
  45. * should default to input, include b4 that we are using here.
  46. */
  47. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  48. ut_asserteq_str("b4: input: 0 [ ]", buf);
  49. /* Change it to an output */
  50. sandbox_gpio_set_direction(dev, offset, 1);
  51. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  52. ut_asserteq_str("b4: output: 0 [ ]", buf);
  53. sandbox_gpio_set_value(dev, offset, 1);
  54. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  55. ut_asserteq_str("b4: output: 1 [ ]", buf);
  56. ut_assertok(gpio_request(gpio, "testing"));
  57. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  58. ut_asserteq_str("b4: output: 1 [x] testing", buf);
  59. /* Change the value a bit */
  60. ut_asserteq(1, ops->get_value(dev, offset));
  61. ut_assertok(ops->set_value(dev, offset, 0));
  62. ut_asserteq(0, ops->get_value(dev, offset));
  63. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  64. ut_asserteq_str("b4: output: 0 [x] testing", buf);
  65. ut_assertok(ops->set_value(dev, offset, 1));
  66. ut_asserteq(1, ops->get_value(dev, offset));
  67. /* Make it an open drain output, and reset it */
  68. ut_asserteq(GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE,
  69. sandbox_gpio_get_dir_flags(dev, offset));
  70. ut_assertok(ops->set_dir_flags(dev, offset,
  71. GPIOD_IS_OUT | GPIOD_OPEN_DRAIN));
  72. ut_asserteq(GPIOD_IS_OUT | GPIOD_OPEN_DRAIN,
  73. sandbox_gpio_get_dir_flags(dev, offset));
  74. ut_assertok(ops->set_dir_flags(dev, offset,
  75. GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE));
  76. ut_asserteq(GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE,
  77. sandbox_gpio_get_dir_flags(dev, offset));
  78. /* Make it an input */
  79. ut_assertok(ops->direction_input(dev, offset));
  80. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  81. ut_asserteq_str("b4: input: 1 [x] testing", buf);
  82. sandbox_gpio_set_value(dev, offset, 0);
  83. ut_asserteq(0, sandbox_gpio_get_value(dev, offset));
  84. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  85. ut_asserteq_str("b4: input: 0 [x] testing", buf);
  86. ut_assertok(gpio_free(gpio));
  87. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  88. ut_asserteq_str("b4: input: 0 [ ]", buf);
  89. /* Check the 'a' bank also */
  90. ut_assertok(gpio_lookup_name("a15", &dev, &offset, &gpio));
  91. ut_asserteq_str(dev->name, "base-gpios");
  92. ut_asserteq(15, offset);
  93. ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 15, gpio);
  94. name = gpio_get_bank_info(dev, &offset_count);
  95. ut_asserteq_str("a", name);
  96. ut_asserteq(20, offset_count);
  97. /* add gpio hog tests */
  98. ut_assertok(gpio_hog_lookup_name("hog_input_active_low", &desc));
  99. ut_asserteq(GPIOD_IS_IN | GPIOD_ACTIVE_LOW, desc->flags);
  100. ut_asserteq(0, desc->offset);
  101. ut_asserteq(1, dm_gpio_get_value(desc));
  102. ut_assertok(gpio_hog_lookup_name("hog_input_active_high", &desc));
  103. ut_asserteq(GPIOD_IS_IN, desc->flags);
  104. ut_asserteq(1, desc->offset);
  105. ut_asserteq(0, dm_gpio_get_value(desc));
  106. ut_assertok(gpio_hog_lookup_name("hog_output_low", &desc));
  107. ut_asserteq(GPIOD_IS_OUT, desc->flags);
  108. ut_asserteq(2, desc->offset);
  109. ut_asserteq(0, dm_gpio_get_value(desc));
  110. ut_assertok(dm_gpio_set_value(desc, 1));
  111. ut_asserteq(1, dm_gpio_get_value(desc));
  112. ut_assertok(gpio_hog_lookup_name("hog_output_high", &desc));
  113. ut_asserteq(GPIOD_IS_OUT, desc->flags);
  114. ut_asserteq(3, desc->offset);
  115. ut_asserteq(1, dm_gpio_get_value(desc));
  116. ut_assertok(dm_gpio_set_value(desc, 0));
  117. ut_asserteq(0, dm_gpio_get_value(desc));
  118. /* Check if lookup for labels work */
  119. ut_assertok(gpio_lookup_name("hog_input_active_low", &dev, &offset,
  120. &gpio));
  121. ut_asserteq_str(dev->name, "base-gpios");
  122. ut_asserteq(0, offset);
  123. ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 0, gpio);
  124. ut_assert(gpio_lookup_name("hog_not_exist", &dev, &offset,
  125. &gpio));
  126. return 0;
  127. }
  128. DM_TEST(dm_test_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  129. /* Test that GPIO open-drain/open-source emulation works correctly */
  130. static int dm_test_gpio_opendrain_opensource(struct unit_test_state *uts)
  131. {
  132. struct gpio_desc desc_list[8];
  133. struct udevice *dev, *gpio_c;
  134. char buf[80];
  135. ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
  136. ut_asserteq_str("a-test", dev->name);
  137. ut_assertok(uclass_get_device(UCLASS_GPIO, 3, &gpio_c));
  138. ut_asserteq_str("pinmux-gpios", gpio_c->name);
  139. ut_asserteq(8, gpio_request_list_by_name(dev, "test3-gpios", desc_list,
  140. ARRAY_SIZE(desc_list), 0))
  141. ut_asserteq(true, !!device_active(gpio_c));
  142. ut_asserteq_ptr(gpio_c, desc_list[0].dev);
  143. ut_asserteq_ptr(gpio_c, desc_list[1].dev);
  144. ut_asserteq_ptr(gpio_c, desc_list[2].dev);
  145. ut_asserteq_ptr(gpio_c, desc_list[3].dev);
  146. ut_asserteq_ptr(gpio_c, desc_list[4].dev);
  147. ut_asserteq_ptr(gpio_c, desc_list[5].dev);
  148. ut_asserteq_ptr(gpio_c, desc_list[6].dev);
  149. ut_asserteq_ptr(gpio_c, desc_list[7].dev);
  150. /* GPIO 0 is (GPIO_OUT|GPIO_OPEN_DRAIN) */
  151. ut_asserteq(GPIOD_IS_OUT | GPIOD_OPEN_DRAIN,
  152. sandbox_gpio_get_dir_flags(gpio_c, 0));
  153. /* Set it as output high, should become an input */
  154. ut_assertok(dm_gpio_set_value(&desc_list[0], 1));
  155. ut_assertok(gpio_get_status(gpio_c, 0, buf, sizeof(buf)));
  156. ut_asserteq_str("c0: input: 0 [x] a-test.test3-gpios0", buf);
  157. /* Set it as output low, should become output low */
  158. ut_assertok(dm_gpio_set_value(&desc_list[0], 0));
  159. ut_assertok(gpio_get_status(gpio_c, 0, buf, sizeof(buf)));
  160. ut_asserteq_str("c0: output: 0 [x] a-test.test3-gpios0", buf);
  161. /* GPIO 1 is (GPIO_OUT|GPIO_OPEN_SOURCE) */
  162. ut_asserteq(GPIOD_IS_OUT | GPIOD_OPEN_SOURCE,
  163. sandbox_gpio_get_dir_flags(gpio_c, 1));
  164. /* Set it as output high, should become output high */
  165. ut_assertok(dm_gpio_set_value(&desc_list[1], 1));
  166. ut_assertok(gpio_get_status(gpio_c, 1, buf, sizeof(buf)));
  167. ut_asserteq_str("c1: output: 1 [x] a-test.test3-gpios1", buf);
  168. /* Set it as output low, should become an input */
  169. ut_assertok(dm_gpio_set_value(&desc_list[1], 0));
  170. ut_assertok(gpio_get_status(gpio_c, 1, buf, sizeof(buf)));
  171. ut_asserteq_str("c1: input: 1 [x] a-test.test3-gpios1", buf);
  172. /* GPIO 6 is (GPIO_ACTIVE_LOW|GPIO_OUT|GPIO_OPEN_DRAIN) */
  173. ut_asserteq(GPIOD_ACTIVE_LOW | GPIOD_IS_OUT | GPIOD_OPEN_DRAIN,
  174. sandbox_gpio_get_dir_flags(gpio_c, 6));
  175. /* Set it as output high, should become output low */
  176. ut_assertok(dm_gpio_set_value(&desc_list[6], 1));
  177. ut_assertok(gpio_get_status(gpio_c, 6, buf, sizeof(buf)));
  178. ut_asserteq_str("c6: output: 0 [x] a-test.test3-gpios6", buf);
  179. /* Set it as output low, should become an input */
  180. ut_assertok(dm_gpio_set_value(&desc_list[6], 0));
  181. ut_assertok(gpio_get_status(gpio_c, 6, buf, sizeof(buf)));
  182. ut_asserteq_str("c6: input: 0 [x] a-test.test3-gpios6", buf);
  183. /* GPIO 7 is (GPIO_ACTIVE_LOW|GPIO_OUT|GPIO_OPEN_SOURCE) */
  184. ut_asserteq(GPIOD_ACTIVE_LOW | GPIOD_IS_OUT | GPIOD_OPEN_SOURCE,
  185. sandbox_gpio_get_dir_flags(gpio_c, 7));
  186. /* Set it as output high, should become an input */
  187. ut_assertok(dm_gpio_set_value(&desc_list[7], 1));
  188. ut_assertok(gpio_get_status(gpio_c, 7, buf, sizeof(buf)));
  189. ut_asserteq_str("c7: input: 0 [x] a-test.test3-gpios7", buf);
  190. /* Set it as output low, should become output high */
  191. ut_assertok(dm_gpio_set_value(&desc_list[7], 0));
  192. ut_assertok(gpio_get_status(gpio_c, 7, buf, sizeof(buf)));
  193. ut_asserteq_str("c7: output: 1 [x] a-test.test3-gpios7", buf);
  194. ut_assertok(gpio_free_list(dev, desc_list, 8));
  195. return 0;
  196. }
  197. DM_TEST(dm_test_gpio_opendrain_opensource,
  198. DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  199. /* Test that sandbox anonymous GPIOs work correctly */
  200. static int dm_test_gpio_anon(struct unit_test_state *uts)
  201. {
  202. unsigned int offset, gpio;
  203. struct udevice *dev;
  204. const char *name;
  205. int offset_count;
  206. /* And the anonymous bank */
  207. ut_assertok(gpio_lookup_name("14", &dev, &offset, &gpio));
  208. ut_asserteq_str(dev->name, "sandbox_gpio");
  209. ut_asserteq(14, offset);
  210. ut_asserteq(14, gpio);
  211. name = gpio_get_bank_info(dev, &offset_count);
  212. ut_asserteq_ptr(NULL, name);
  213. ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT, offset_count);
  214. return 0;
  215. }
  216. DM_TEST(dm_test_gpio_anon, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  217. /* Test that gpio_requestf() works as expected */
  218. static int dm_test_gpio_requestf(struct unit_test_state *uts)
  219. {
  220. unsigned int offset, gpio;
  221. struct udevice *dev;
  222. char buf[80];
  223. ut_assertok(gpio_lookup_name("b5", &dev, &offset, &gpio));
  224. ut_assertok(gpio_requestf(gpio, "testing %d %s", 1, "hi"));
  225. sandbox_gpio_set_direction(dev, offset, 1);
  226. sandbox_gpio_set_value(dev, offset, 1);
  227. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  228. ut_asserteq_str("b5: output: 1 [x] testing 1 hi", buf);
  229. return 0;
  230. }
  231. DM_TEST(dm_test_gpio_requestf, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  232. /* Test that gpio_request() copies its string */
  233. static int dm_test_gpio_copy(struct unit_test_state *uts)
  234. {
  235. unsigned int offset, gpio;
  236. struct udevice *dev;
  237. char buf[80], name[10];
  238. ut_assertok(gpio_lookup_name("b6", &dev, &offset, &gpio));
  239. strcpy(name, "odd_name");
  240. ut_assertok(gpio_request(gpio, name));
  241. sandbox_gpio_set_direction(dev, offset, 1);
  242. sandbox_gpio_set_value(dev, offset, 1);
  243. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  244. ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
  245. strcpy(name, "nothing");
  246. ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
  247. ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
  248. return 0;
  249. }
  250. DM_TEST(dm_test_gpio_copy, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  251. /* Test that we don't leak memory with GPIOs */
  252. static int dm_test_gpio_leak(struct unit_test_state *uts)
  253. {
  254. ut_assertok(dm_test_gpio(uts));
  255. ut_assertok(dm_test_gpio_anon(uts));
  256. ut_assertok(dm_test_gpio_requestf(uts));
  257. ut_assertok(dm_leak_check_end(uts));
  258. return 0;
  259. }
  260. DM_TEST(dm_test_gpio_leak, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  261. /* Test that we can find GPIOs using phandles */
  262. static int dm_test_gpio_phandles(struct unit_test_state *uts)
  263. {
  264. struct gpio_desc desc, desc_list[8], desc_list2[8];
  265. struct udevice *dev, *gpio_a, *gpio_b;
  266. ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
  267. ut_asserteq_str("a-test", dev->name);
  268. ut_assertok(gpio_request_by_name(dev, "test-gpios", 1, &desc, 0));
  269. ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio_a));
  270. ut_assertok(uclass_get_device(UCLASS_GPIO, 2, &gpio_b));
  271. ut_asserteq_str("base-gpios", gpio_a->name);
  272. ut_asserteq(true, !!device_active(gpio_a));
  273. ut_asserteq_ptr(gpio_a, desc.dev);
  274. ut_asserteq(4, desc.offset);
  275. /* GPIOF_INPUT is the sandbox GPIO driver default */
  276. ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_a, 4, NULL));
  277. ut_assertok(dm_gpio_free(dev, &desc));
  278. ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 3, &desc,
  279. 0));
  280. ut_asserteq_ptr(NULL, desc.dev);
  281. ut_asserteq(desc.offset, 0);
  282. ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 5, &desc,
  283. 0));
  284. /* Last GPIO is ignord as it comes after <0> */
  285. ut_asserteq(3, gpio_request_list_by_name(dev, "test-gpios", desc_list,
  286. ARRAY_SIZE(desc_list), 0));
  287. ut_asserteq(-EBUSY, gpio_request_list_by_name(dev, "test-gpios",
  288. desc_list2,
  289. ARRAY_SIZE(desc_list2),
  290. 0));
  291. ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_a, 4, NULL));
  292. ut_assertok(gpio_free_list(dev, desc_list, 3));
  293. ut_asserteq(GPIOF_UNUSED, gpio_get_function(gpio_a, 4, NULL));
  294. ut_asserteq(3, gpio_request_list_by_name(dev, "test-gpios", desc_list,
  295. ARRAY_SIZE(desc_list),
  296. GPIOD_IS_OUT |
  297. GPIOD_IS_OUT_ACTIVE));
  298. ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_a, 4, NULL));
  299. ut_asserteq_ptr(gpio_a, desc_list[0].dev);
  300. ut_asserteq(1, desc_list[0].offset);
  301. ut_asserteq_ptr(gpio_a, desc_list[1].dev);
  302. ut_asserteq(4, desc_list[1].offset);
  303. ut_asserteq_ptr(gpio_b, desc_list[2].dev);
  304. ut_asserteq(5, desc_list[2].offset);
  305. ut_asserteq(1, dm_gpio_get_value(desc_list));
  306. ut_assertok(gpio_free_list(dev, desc_list, 3));
  307. ut_asserteq(GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE,
  308. sandbox_gpio_get_dir_flags(gpio_a, 1));
  309. ut_asserteq(6, gpio_request_list_by_name(dev, "test2-gpios", desc_list,
  310. ARRAY_SIZE(desc_list), 0));
  311. /* This was set to output previously but flags resetted to 0 = INPUT */
  312. ut_asserteq(0, sandbox_gpio_get_dir_flags(gpio_a, 1));
  313. ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_a, 1, NULL));
  314. /* Active low should invert the input value */
  315. ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 6, NULL));
  316. ut_asserteq(1, dm_gpio_get_value(&desc_list[2]));
  317. ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 7, NULL));
  318. ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 8, NULL));
  319. ut_asserteq(0, dm_gpio_get_value(&desc_list[4]));
  320. ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 9, NULL));
  321. ut_asserteq(1, dm_gpio_get_value(&desc_list[5]));
  322. return 0;
  323. }
  324. DM_TEST(dm_test_gpio_phandles, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
  325. /* Check the gpio pin configuration get from device tree information */
  326. static int dm_test_gpio_get_dir_flags(struct unit_test_state *uts)
  327. {
  328. struct gpio_desc desc_list[6];
  329. struct udevice *dev;
  330. ulong flags;
  331. ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
  332. ut_asserteq(6, gpio_request_list_by_name(dev, "test3-gpios", desc_list,
  333. ARRAY_SIZE(desc_list), 0));
  334. ut_assertok(dm_gpio_get_dir_flags(&desc_list[0], &flags));
  335. ut_asserteq(GPIOD_IS_OUT | GPIOD_OPEN_DRAIN, flags);
  336. ut_assertok(dm_gpio_get_dir_flags(&desc_list[1], &flags));
  337. ut_asserteq(GPIOD_IS_OUT | GPIOD_OPEN_SOURCE, flags);
  338. ut_assertok(dm_gpio_get_dir_flags(&desc_list[2], &flags));
  339. ut_asserteq(GPIOD_IS_OUT, flags);
  340. ut_assertok(dm_gpio_get_dir_flags(&desc_list[3], &flags));
  341. ut_asserteq(GPIOD_IS_IN | GPIOD_PULL_UP, flags);
  342. ut_assertok(dm_gpio_get_dir_flags(&desc_list[4], &flags));
  343. ut_asserteq(GPIOD_IS_IN | GPIOD_PULL_DOWN, flags);
  344. ut_assertok(dm_gpio_get_dir_flags(&desc_list[5], &flags));
  345. ut_asserteq(GPIOD_IS_IN, flags);
  346. ut_assertok(gpio_free_list(dev, desc_list, 6));
  347. return 0;
  348. }
  349. DM_TEST(dm_test_gpio_get_dir_flags, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);