xref: /openbmc/u-boot/test/dm/gpio.c (revision 63e22517)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2013 Google, Inc
4  */
5 
6 #include <common.h>
7 #include <fdtdec.h>
8 #include <dm.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 
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 	const char *name;
22 	int offset_count;
23 	char buf[80];
24 
25 	/*
26 	 * We expect to get 3 banks. One is anonymous (just numbered) and
27 	 * comes from platdata. The other two are named a (20 gpios)
28 	 * and b (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 
36 	name = gpio_get_bank_info(dev, &offset_count);
37 	ut_asserteq_str("b", name);
38 	ut_asserteq(10, offset_count);
39 
40 	/* Get the operations for this device */
41 	ops = gpio_get_ops(dev);
42 	ut_assert(ops->get_function);
43 
44 	/* Cannot get a value until it is reserved */
45 	ut_asserteq(-EBUSY, gpio_get_value(gpio + 1));
46 	/*
47 	 * Now some tests that use the 'sandbox' back door. All GPIOs
48 	 * should default to input, include b4 that we are using here.
49 	 */
50 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
51 	ut_asserteq_str("b4: input: 0 [ ]", buf);
52 
53 	/* Change it to an output */
54 	sandbox_gpio_set_direction(dev, offset, 1);
55 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
56 	ut_asserteq_str("b4: output: 0 [ ]", buf);
57 
58 	sandbox_gpio_set_value(dev, offset, 1);
59 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
60 	ut_asserteq_str("b4: output: 1 [ ]", buf);
61 
62 	ut_assertok(gpio_request(gpio, "testing"));
63 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
64 	ut_asserteq_str("b4: output: 1 [x] testing", buf);
65 
66 	/* Change the value a bit */
67 	ut_asserteq(1, ops->get_value(dev, offset));
68 	ut_assertok(ops->set_value(dev, offset, 0));
69 	ut_asserteq(0, ops->get_value(dev, offset));
70 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
71 	ut_asserteq_str("b4: output: 0 [x] testing", buf);
72 	ut_assertok(ops->set_value(dev, offset, 1));
73 	ut_asserteq(1, ops->get_value(dev, offset));
74 
75 	/* Make it an open drain output, and reset it */
76 	ut_asserteq(0, sandbox_gpio_get_open_drain(dev, offset));
77 	ut_assertok(ops->set_open_drain(dev, offset, 1));
78 	ut_asserteq(1, sandbox_gpio_get_open_drain(dev, offset));
79 	ut_assertok(ops->set_open_drain(dev, offset, 0));
80 	ut_asserteq(0, sandbox_gpio_get_open_drain(dev, offset));
81 
82 	/* Make it an input */
83 	ut_assertok(ops->direction_input(dev, offset));
84 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
85 	ut_asserteq_str("b4: input: 1 [x] testing", buf);
86 	sandbox_gpio_set_value(dev, offset, 0);
87 	ut_asserteq(0, sandbox_gpio_get_value(dev, offset));
88 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
89 	ut_asserteq_str("b4: input: 0 [x] testing", buf);
90 
91 	ut_assertok(gpio_free(gpio));
92 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
93 	ut_asserteq_str("b4: input: 0 [ ]", buf);
94 
95 	/* Check the 'a' bank also */
96 	ut_assertok(gpio_lookup_name("a15", &dev, &offset, &gpio));
97 	ut_asserteq_str(dev->name, "base-gpios");
98 	ut_asserteq(15, offset);
99 	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 15, gpio);
100 
101 	name = gpio_get_bank_info(dev, &offset_count);
102 	ut_asserteq_str("a", name);
103 	ut_asserteq(20, offset_count);
104 
105 	return 0;
106 }
107 DM_TEST(dm_test_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
108 
109 /* Test that sandbox anonymous GPIOs work correctly */
110 static int dm_test_gpio_anon(struct unit_test_state *uts)
111 {
112 	unsigned int offset, gpio;
113 	struct udevice *dev;
114 	const char *name;
115 	int offset_count;
116 
117 	/* And the anonymous bank */
118 	ut_assertok(gpio_lookup_name("14", &dev, &offset, &gpio));
119 	ut_asserteq_str(dev->name, "gpio_sandbox");
120 	ut_asserteq(14, offset);
121 	ut_asserteq(14, gpio);
122 
123 	name = gpio_get_bank_info(dev, &offset_count);
124 	ut_asserteq_ptr(NULL, name);
125 	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT, offset_count);
126 
127 	return 0;
128 }
129 DM_TEST(dm_test_gpio_anon, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
130 
131 /* Test that gpio_requestf() works as expected */
132 static int dm_test_gpio_requestf(struct unit_test_state *uts)
133 {
134 	unsigned int offset, gpio;
135 	struct udevice *dev;
136 	char buf[80];
137 
138 	ut_assertok(gpio_lookup_name("b5", &dev, &offset, &gpio));
139 	ut_assertok(gpio_requestf(gpio, "testing %d %s", 1, "hi"));
140 	sandbox_gpio_set_direction(dev, offset, 1);
141 	sandbox_gpio_set_value(dev, offset, 1);
142 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
143 	ut_asserteq_str("b5: output: 1 [x] testing 1 hi", buf);
144 
145 	return 0;
146 }
147 DM_TEST(dm_test_gpio_requestf, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
148 
149 /* Test that gpio_request() copies its string */
150 static int dm_test_gpio_copy(struct unit_test_state *uts)
151 {
152 	unsigned int offset, gpio;
153 	struct udevice *dev;
154 	char buf[80], name[10];
155 
156 	ut_assertok(gpio_lookup_name("b6", &dev, &offset, &gpio));
157 	strcpy(name, "odd_name");
158 	ut_assertok(gpio_request(gpio, name));
159 	sandbox_gpio_set_direction(dev, offset, 1);
160 	sandbox_gpio_set_value(dev, offset, 1);
161 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
162 	ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
163 	strcpy(name, "nothing");
164 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
165 	ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
166 
167 	return 0;
168 }
169 DM_TEST(dm_test_gpio_copy, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
170 
171 /* Test that we don't leak memory with GPIOs */
172 static int dm_test_gpio_leak(struct unit_test_state *uts)
173 {
174 	ut_assertok(dm_test_gpio(uts));
175 	ut_assertok(dm_test_gpio_anon(uts));
176 	ut_assertok(dm_test_gpio_requestf(uts));
177 	ut_assertok(dm_leak_check_end(uts));
178 
179 	return 0;
180 }
181 DM_TEST(dm_test_gpio_leak, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
182 
183 /* Test that we can find GPIOs using phandles */
184 static int dm_test_gpio_phandles(struct unit_test_state *uts)
185 {
186 	struct gpio_desc desc, desc_list[8], desc_list2[8];
187 	struct udevice *dev, *gpio_a, *gpio_b;
188 
189 	ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
190 	ut_asserteq_str("a-test", dev->name);
191 
192 	ut_assertok(gpio_request_by_name(dev, "test-gpios", 1, &desc, 0));
193 	ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio_a));
194 	ut_assertok(uclass_get_device(UCLASS_GPIO, 2, &gpio_b));
195 	ut_asserteq_str("base-gpios", gpio_a->name);
196 	ut_asserteq(true, !!device_active(gpio_a));
197 	ut_asserteq_ptr(gpio_a, desc.dev);
198 	ut_asserteq(4, desc.offset);
199 	/* GPIOF_INPUT is the sandbox GPIO driver default */
200 	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_a, 4, NULL));
201 	ut_assertok(dm_gpio_free(dev, &desc));
202 
203 	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 3, &desc,
204 						  0));
205 	ut_asserteq_ptr(NULL, desc.dev);
206 	ut_asserteq(desc.offset, 0);
207 	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 5, &desc,
208 						  0));
209 
210 	/* Last GPIO is ignord as it comes after <0> */
211 	ut_asserteq(3, gpio_request_list_by_name(dev, "test-gpios", desc_list,
212 						 ARRAY_SIZE(desc_list), 0));
213 	ut_asserteq(-EBUSY, gpio_request_list_by_name(dev, "test-gpios",
214 						      desc_list2,
215 						      ARRAY_SIZE(desc_list2),
216 						      0));
217 	ut_assertok(gpio_free_list(dev, desc_list, 3));
218 	ut_asserteq(3, gpio_request_list_by_name(dev,  "test-gpios", desc_list,
219 						 ARRAY_SIZE(desc_list),
220 						 GPIOD_IS_OUT |
221 						 GPIOD_IS_OUT_ACTIVE));
222 	ut_asserteq_ptr(gpio_a, desc_list[0].dev);
223 	ut_asserteq(1, desc_list[0].offset);
224 	ut_asserteq_ptr(gpio_a, desc_list[1].dev);
225 	ut_asserteq(4, desc_list[1].offset);
226 	ut_asserteq_ptr(gpio_b, desc_list[2].dev);
227 	ut_asserteq(5, desc_list[2].offset);
228 	ut_asserteq(1, dm_gpio_get_value(desc_list));
229 	ut_assertok(gpio_free_list(dev, desc_list, 3));
230 
231 	ut_asserteq(6, gpio_request_list_by_name(dev, "test2-gpios", desc_list,
232 						 ARRAY_SIZE(desc_list), 0));
233 	/* This was set to output previously, so still will be */
234 	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_a, 1, NULL));
235 
236 	/* Active low should invert the input value */
237 	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 6, NULL));
238 	ut_asserteq(1, dm_gpio_get_value(&desc_list[2]));
239 
240 	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 7, NULL));
241 	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 8, NULL));
242 	ut_asserteq(0, dm_gpio_get_value(&desc_list[4]));
243 	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 9, NULL));
244 	ut_asserteq(1, dm_gpio_get_value(&desc_list[5]));
245 
246 
247 	return 0;
248 }
249 DM_TEST(dm_test_gpio_phandles, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
250