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/ut.h>
  12 #include <dm/test.h>
  13 #include <dm/util.h>
  14 #include <asm/gpio.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 /* Test that sandbox GPIOs work correctly */
  19 static int dm_test_gpio(struct dm_test_state *dms)
  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 dm_test_state *dms)
 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 dm_test_state *dms)
 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 dm_test_state *dms)
 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 dm_test_state *dms)
 169 {
 170         ut_assertok(dm_test_gpio(dms));
 171         ut_assertok(dm_test_gpio_anon(dms));
 172         ut_assertok(dm_test_gpio_requestf(dms));
 173         ut_assertok(dm_leak_check_end(dms));
 174
 175         return 0;
 176 }
 177
 178 DM_TEST(dm_test_gpio_leak, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);