xref: /openbmc/u-boot/test/dm/gpio.c (revision 9ae63f46a387573236372b937ada34daa55b893d)
1  /*
2   * Copyright (C) 2013 Google, Inc
3   *
4   * SPDX-License-Identifier:	GPL-2.0+
5   */
6  
7  #include <common.h>
8  #include <fdtdec.h>
9  #include <dm.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  
16  DECLARE_GLOBAL_DATA_PTR;
17  
18  /* Test that sandbox GPIOs work correctly */
19  static int dm_test_gpio(struct unit_test_state *uts)
20  {
21  	unsigned int offset, gpio;
22  	struct dm_gpio_ops *ops;
23  	struct udevice *dev;
24  	const char *name;
25  	int offset_count;
26  	char buf[80];
27  
28  	/*
29  	 * We expect to get 3 banks. One is anonymous (just numbered) and
30  	 * comes from platdata. The other two are named a (20 gpios)
31  	 * and b (10 gpios) and come from the device tree. See
32  	 * test/dm/test.dts.
33  	 */
34  	ut_assertok(gpio_lookup_name("b4", &dev, &offset, &gpio));
35  	ut_asserteq_str(dev->name, "extra-gpios");
36  	ut_asserteq(4, offset);
37  	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 20 + 4, gpio);
38  
39  	name = gpio_get_bank_info(dev, &offset_count);
40  	ut_asserteq_str("b", name);
41  	ut_asserteq(10, offset_count);
42  
43  	/* Get the operations for this device */
44  	ops = gpio_get_ops(dev);
45  	ut_assert(ops->get_function);
46  
47  	/* Cannot get a value until it is reserved */
48  	ut_asserteq(-EBUSY, gpio_get_value(gpio + 1));
49  	/*
50  	 * Now some tests that use the 'sandbox' back door. All GPIOs
51  	 * should default to input, include b4 that we are using here.
52  	 */
53  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
54  	ut_asserteq_str("b4: input: 0 [ ]", buf);
55  
56  	/* Change it to an output */
57  	sandbox_gpio_set_direction(dev, offset, 1);
58  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
59  	ut_asserteq_str("b4: output: 0 [ ]", buf);
60  
61  	sandbox_gpio_set_value(dev, offset, 1);
62  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
63  	ut_asserteq_str("b4: output: 1 [ ]", buf);
64  
65  	ut_assertok(gpio_request(gpio, "testing"));
66  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
67  	ut_asserteq_str("b4: output: 1 [x] testing", buf);
68  
69  	/* Change the value a bit */
70  	ut_asserteq(1, ops->get_value(dev, offset));
71  	ut_assertok(ops->set_value(dev, offset, 0));
72  	ut_asserteq(0, ops->get_value(dev, offset));
73  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
74  	ut_asserteq_str("b4: output: 0 [x] testing", buf);
75  	ut_assertok(ops->set_value(dev, offset, 1));
76  	ut_asserteq(1, ops->get_value(dev, offset));
77  
78  	/* Make it an open drain output, and reset it */
79  	ut_asserteq(0, sandbox_gpio_get_open_drain(dev, offset));
80  	ut_assertok(ops->set_open_drain(dev, offset, 1));
81  	ut_asserteq(1, sandbox_gpio_get_open_drain(dev, offset));
82  	ut_assertok(ops->set_open_drain(dev, offset, 0));
83  	ut_asserteq(0, sandbox_gpio_get_open_drain(dev, offset));
84  
85  	/* Make it an input */
86  	ut_assertok(ops->direction_input(dev, offset));
87  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
88  	ut_asserteq_str("b4: input: 1 [x] testing", buf);
89  	sandbox_gpio_set_value(dev, offset, 0);
90  	ut_asserteq(0, sandbox_gpio_get_value(dev, offset));
91  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
92  	ut_asserteq_str("b4: input: 0 [x] testing", buf);
93  
94  	ut_assertok(gpio_free(gpio));
95  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
96  	ut_asserteq_str("b4: input: 0 [ ]", buf);
97  
98  	/* Check the 'a' bank also */
99  	ut_assertok(gpio_lookup_name("a15", &dev, &offset, &gpio));
100  	ut_asserteq_str(dev->name, "base-gpios");
101  	ut_asserteq(15, offset);
102  	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 15, gpio);
103  
104  	name = gpio_get_bank_info(dev, &offset_count);
105  	ut_asserteq_str("a", name);
106  	ut_asserteq(20, offset_count);
107  
108  	return 0;
109  }
110  DM_TEST(dm_test_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
111  
112  /* Test that sandbox anonymous GPIOs work correctly */
113  static int dm_test_gpio_anon(struct unit_test_state *uts)
114  {
115  	unsigned int offset, gpio;
116  	struct udevice *dev;
117  	const char *name;
118  	int offset_count;
119  
120  	/* And the anonymous bank */
121  	ut_assertok(gpio_lookup_name("14", &dev, &offset, &gpio));
122  	ut_asserteq_str(dev->name, "gpio_sandbox");
123  	ut_asserteq(14, offset);
124  	ut_asserteq(14, gpio);
125  
126  	name = gpio_get_bank_info(dev, &offset_count);
127  	ut_asserteq_ptr(NULL, name);
128  	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT, offset_count);
129  
130  	return 0;
131  }
132  DM_TEST(dm_test_gpio_anon, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
133  
134  /* Test that gpio_requestf() works as expected */
135  static int dm_test_gpio_requestf(struct unit_test_state *uts)
136  {
137  	unsigned int offset, gpio;
138  	struct udevice *dev;
139  	char buf[80];
140  
141  	ut_assertok(gpio_lookup_name("b5", &dev, &offset, &gpio));
142  	ut_assertok(gpio_requestf(gpio, "testing %d %s", 1, "hi"));
143  	sandbox_gpio_set_direction(dev, offset, 1);
144  	sandbox_gpio_set_value(dev, offset, 1);
145  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
146  	ut_asserteq_str("b5: output: 1 [x] testing 1 hi", buf);
147  
148  	return 0;
149  }
150  DM_TEST(dm_test_gpio_requestf, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
151  
152  /* Test that gpio_request() copies its string */
153  static int dm_test_gpio_copy(struct unit_test_state *uts)
154  {
155  	unsigned int offset, gpio;
156  	struct udevice *dev;
157  	char buf[80], name[10];
158  
159  	ut_assertok(gpio_lookup_name("b6", &dev, &offset, &gpio));
160  	strcpy(name, "odd_name");
161  	ut_assertok(gpio_request(gpio, name));
162  	sandbox_gpio_set_direction(dev, offset, 1);
163  	sandbox_gpio_set_value(dev, offset, 1);
164  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
165  	ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
166  	strcpy(name, "nothing");
167  	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
168  	ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
169  
170  	return 0;
171  }
172  DM_TEST(dm_test_gpio_copy, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
173  
174  /* Test that we don't leak memory with GPIOs */
175  static int dm_test_gpio_leak(struct unit_test_state *uts)
176  {
177  	ut_assertok(dm_test_gpio(uts));
178  	ut_assertok(dm_test_gpio_anon(uts));
179  	ut_assertok(dm_test_gpio_requestf(uts));
180  	ut_assertok(dm_leak_check_end(uts));
181  
182  	return 0;
183  }
184  DM_TEST(dm_test_gpio_leak, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
185  
186  /* Test that we can find GPIOs using phandles */
187  static int dm_test_gpio_phandles(struct unit_test_state *uts)
188  {
189  	struct gpio_desc desc, desc_list[8], desc_list2[8];
190  	struct udevice *dev, *gpio_a, *gpio_b;
191  
192  	ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
193  	ut_asserteq_str("a-test", dev->name);
194  
195  	ut_assertok(gpio_request_by_name(dev, "test-gpios", 1, &desc, 0));
196  	ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio_a));
197  	ut_assertok(uclass_get_device(UCLASS_GPIO, 2, &gpio_b));
198  	ut_asserteq_str("base-gpios", gpio_a->name);
199  	ut_asserteq(true, !!device_active(gpio_a));
200  	ut_asserteq_ptr(gpio_a, desc.dev);
201  	ut_asserteq(4, desc.offset);
202  	/* GPIOF_INPUT is the sandbox GPIO driver default */
203  	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_a, 4, NULL));
204  	ut_assertok(dm_gpio_free(dev, &desc));
205  
206  	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 3, &desc,
207  						  0));
208  	ut_asserteq_ptr(NULL, desc.dev);
209  	ut_asserteq(desc.offset, 0);
210  	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 5, &desc,
211  						  0));
212  
213  	/* Last GPIO is ignord as it comes after <0> */
214  	ut_asserteq(3, gpio_request_list_by_name(dev, "test-gpios", desc_list,
215  						 ARRAY_SIZE(desc_list), 0));
216  	ut_asserteq(-EBUSY, gpio_request_list_by_name(dev, "test-gpios",
217  						      desc_list2,
218  						      ARRAY_SIZE(desc_list2),
219  						      0));
220  	ut_assertok(gpio_free_list(dev, desc_list, 3));
221  	ut_asserteq(3, gpio_request_list_by_name(dev,  "test-gpios", desc_list,
222  						 ARRAY_SIZE(desc_list),
223  						 GPIOD_IS_OUT |
224  						 GPIOD_IS_OUT_ACTIVE));
225  	ut_asserteq_ptr(gpio_a, desc_list[0].dev);
226  	ut_asserteq(1, desc_list[0].offset);
227  	ut_asserteq_ptr(gpio_a, desc_list[1].dev);
228  	ut_asserteq(4, desc_list[1].offset);
229  	ut_asserteq_ptr(gpio_b, desc_list[2].dev);
230  	ut_asserteq(5, desc_list[2].offset);
231  	ut_asserteq(1, dm_gpio_get_value(desc_list));
232  	ut_assertok(gpio_free_list(dev, desc_list, 3));
233  
234  	ut_asserteq(6, gpio_request_list_by_name(dev, "test2-gpios", desc_list,
235  						 ARRAY_SIZE(desc_list), 0));
236  	/* This was set to output previously, so still will be */
237  	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_a, 1, NULL));
238  
239  	/* Active low should invert the input value */
240  	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 6, NULL));
241  	ut_asserteq(1, dm_gpio_get_value(&desc_list[2]));
242  
243  	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 7, NULL));
244  	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 8, NULL));
245  	ut_asserteq(0, dm_gpio_get_value(&desc_list[4]));
246  	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 9, NULL));
247  	ut_asserteq(1, dm_gpio_get_value(&desc_list[5]));
248  
249  
250  	return 0;
251  }
252  DM_TEST(dm_test_gpio_phandles, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
253