xref: /openbmc/u-boot/test/dm/gpio.c (revision 64d16706)
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 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 
87 	ut_assertok(gpio_free(gpio));
88 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
89 	ut_asserteq_str("b4: input: 0 [ ]", buf);
90 
91 	/* Check the 'a' bank also */
92 	ut_assertok(gpio_lookup_name("a15", &dev, &offset, &gpio));
93 	ut_asserteq_str(dev->name, "base-gpios");
94 	ut_asserteq(15, offset);
95 	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 15, gpio);
96 
97 	name = gpio_get_bank_info(dev, &offset_count);
98 	ut_asserteq_str("a", name);
99 	ut_asserteq(20, offset_count);
100 
101 	return 0;
102 }
103 DM_TEST(dm_test_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
104 
105 /* Test that sandbox anonymous GPIOs work correctly */
106 static int dm_test_gpio_anon(struct unit_test_state *uts)
107 {
108 	unsigned int offset, gpio;
109 	struct udevice *dev;
110 	const char *name;
111 	int offset_count;
112 
113 	/* And the anonymous bank */
114 	ut_assertok(gpio_lookup_name("14", &dev, &offset, &gpio));
115 	ut_asserteq_str(dev->name, "gpio_sandbox");
116 	ut_asserteq(14, offset);
117 	ut_asserteq(14, gpio);
118 
119 	name = gpio_get_bank_info(dev, &offset_count);
120 	ut_asserteq_ptr(NULL, name);
121 	ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT, offset_count);
122 
123 	return 0;
124 }
125 DM_TEST(dm_test_gpio_anon, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
126 
127 /* Test that gpio_requestf() works as expected */
128 static int dm_test_gpio_requestf(struct unit_test_state *uts)
129 {
130 	unsigned int offset, gpio;
131 	struct udevice *dev;
132 	char buf[80];
133 
134 	ut_assertok(gpio_lookup_name("b5", &dev, &offset, &gpio));
135 	ut_assertok(gpio_requestf(gpio, "testing %d %s", 1, "hi"));
136 	sandbox_gpio_set_direction(dev, offset, 1);
137 	sandbox_gpio_set_value(dev, offset, 1);
138 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
139 	ut_asserteq_str("b5: output: 1 [x] testing 1 hi", buf);
140 
141 	return 0;
142 }
143 DM_TEST(dm_test_gpio_requestf, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
144 
145 /* Test that gpio_request() copies its string */
146 static int dm_test_gpio_copy(struct unit_test_state *uts)
147 {
148 	unsigned int offset, gpio;
149 	struct udevice *dev;
150 	char buf[80], name[10];
151 
152 	ut_assertok(gpio_lookup_name("b6", &dev, &offset, &gpio));
153 	strcpy(name, "odd_name");
154 	ut_assertok(gpio_request(gpio, name));
155 	sandbox_gpio_set_direction(dev, offset, 1);
156 	sandbox_gpio_set_value(dev, offset, 1);
157 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
158 	ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
159 	strcpy(name, "nothing");
160 	ut_assertok(gpio_get_status(dev, offset, buf, sizeof(buf)));
161 	ut_asserteq_str("b6: output: 1 [x] odd_name", buf);
162 
163 	return 0;
164 }
165 DM_TEST(dm_test_gpio_copy, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
166 
167 /* Test that we don't leak memory with GPIOs */
168 static int dm_test_gpio_leak(struct unit_test_state *uts)
169 {
170 	ut_assertok(dm_test_gpio(uts));
171 	ut_assertok(dm_test_gpio_anon(uts));
172 	ut_assertok(dm_test_gpio_requestf(uts));
173 	ut_assertok(dm_leak_check_end(uts));
174 
175 	return 0;
176 }
177 DM_TEST(dm_test_gpio_leak, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
178 
179 /* Test that we can find GPIOs using phandles */
180 static int dm_test_gpio_phandles(struct unit_test_state *uts)
181 {
182 	struct gpio_desc desc, desc_list[8], desc_list2[8];
183 	struct udevice *dev, *gpio_a, *gpio_b;
184 
185 	ut_assertok(uclass_get_device(UCLASS_TEST_FDT, 0, &dev));
186 	ut_asserteq_str("a-test", dev->name);
187 
188 	ut_assertok(gpio_request_by_name(dev, "test-gpios", 1, &desc, 0));
189 	ut_assertok(uclass_get_device(UCLASS_GPIO, 1, &gpio_a));
190 	ut_assertok(uclass_get_device(UCLASS_GPIO, 2, &gpio_b));
191 	ut_asserteq_str("base-gpios", gpio_a->name);
192 	ut_asserteq(true, !!device_active(gpio_a));
193 	ut_asserteq_ptr(gpio_a, desc.dev);
194 	ut_asserteq(4, desc.offset);
195 	/* GPIOF_INPUT is the sandbox GPIO driver default */
196 	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_a, 4, NULL));
197 	ut_assertok(dm_gpio_free(dev, &desc));
198 
199 	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 3, &desc,
200 						  0));
201 	ut_asserteq_ptr(NULL, desc.dev);
202 	ut_asserteq(desc.offset, 0);
203 	ut_asserteq(-ENOENT, gpio_request_by_name(dev, "test-gpios", 5, &desc,
204 						  0));
205 
206 	/* Last GPIO is ignord as it comes after <0> */
207 	ut_asserteq(3, gpio_request_list_by_name(dev, "test-gpios", desc_list,
208 						 ARRAY_SIZE(desc_list), 0));
209 	ut_asserteq(-EBUSY, gpio_request_list_by_name(dev, "test-gpios",
210 						      desc_list2,
211 						      ARRAY_SIZE(desc_list2),
212 						      0));
213 	ut_assertok(gpio_free_list(dev, desc_list, 3));
214 	ut_asserteq(3, gpio_request_list_by_name(dev,  "test-gpios", desc_list,
215 						 ARRAY_SIZE(desc_list),
216 						 GPIOD_IS_OUT |
217 						 GPIOD_IS_OUT_ACTIVE));
218 	ut_asserteq_ptr(gpio_a, desc_list[0].dev);
219 	ut_asserteq(1, desc_list[0].offset);
220 	ut_asserteq_ptr(gpio_a, desc_list[1].dev);
221 	ut_asserteq(4, desc_list[1].offset);
222 	ut_asserteq_ptr(gpio_b, desc_list[2].dev);
223 	ut_asserteq(5, desc_list[2].offset);
224 	ut_asserteq(1, dm_gpio_get_value(desc_list));
225 	ut_assertok(gpio_free_list(dev, desc_list, 3));
226 
227 	ut_asserteq(6, gpio_request_list_by_name(dev, "test2-gpios", desc_list,
228 						 ARRAY_SIZE(desc_list), 0));
229 	/* This was set to output previously, so still will be */
230 	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_a, 1, NULL));
231 
232 	/* Active low should invert the input value */
233 	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 6, NULL));
234 	ut_asserteq(1, dm_gpio_get_value(&desc_list[2]));
235 
236 	ut_asserteq(GPIOF_INPUT, gpio_get_function(gpio_b, 7, NULL));
237 	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 8, NULL));
238 	ut_asserteq(0, dm_gpio_get_value(&desc_list[4]));
239 	ut_asserteq(GPIOF_OUTPUT, gpio_get_function(gpio_b, 9, NULL));
240 	ut_asserteq(1, dm_gpio_get_value(&desc_list[5]));
241 
242 
243 	return 0;
244 }
245 DM_TEST(dm_test_gpio_phandles, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
246