test/dm/gpio.c

   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);