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