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/ut.h>
  11 #include <dm/test.h>
  12 #include <dm/util.h>
  13 #include <asm/gpio.h>
  14
  15 /* Test that sandbox GPIOs work correctly */
  16 static int dm_test_gpio(struct dm_test_state *dms)
  17 {
  18         unsigned int offset, gpio;
  19         struct dm_gpio_ops *ops;
  20         struct device *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_state);
  43
  44         /* Cannot get a value until it is reserved */
  45         ut_asserteq(-1, ops->get_value(dev, offset));
  46
  47         /*
  48          * Now some tests that use the 'sandbox' back door. All GPIOs
  49          * should default to input, include b4 that we are using here.
  50          */
  51         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  52         ut_asserteq_str("b4:  in: 0 [ ]", buf);
  53
  54         /* Change it to an output */
  55         sandbox_gpio_set_direction(dev, offset, 1);
  56         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  57         ut_asserteq_str("b4: out: 0 [ ]", buf);
  58
  59         sandbox_gpio_set_value(dev, offset, 1);
  60         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  61         ut_asserteq_str("b4: out: 1 [ ]", buf);
  62
  63         ut_assertok(ops->request(dev, offset, "testing"));
  64         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  65         ut_asserteq_str("b4: out: 1 [x] testing", buf);
  66
  67         /* Change the value a bit */
  68         ut_asserteq(1, ops->get_value(dev, offset));
  69         ut_assertok(ops->set_value(dev, offset, 0));
  70         ut_asserteq(0, ops->get_value(dev, offset));
  71         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  72         ut_asserteq_str("b4: out: 0 [x] testing", buf);
  73         ut_assertok(ops->set_value(dev, offset, 1));
  74         ut_asserteq(1, ops->get_value(dev, offset));
  75
  76         /* Make it an input */
  77         ut_assertok(ops->direction_input(dev, offset));
  78         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  79         ut_asserteq_str("b4:  in: 1 [x] testing", buf);
  80         sandbox_gpio_set_value(dev, offset, 0);
  81         ut_asserteq(0, sandbox_gpio_get_value(dev, offset));
  82         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  83         ut_asserteq_str("b4:  in: 0 [x] testing", buf);
  84
  85         ut_assertok(ops->free(dev, offset));
  86         ut_assertok(ops->get_state(dev, offset, buf, sizeof(buf)));
  87         ut_asserteq_str("b4:  in: 0 [ ]", buf);
  88
  89         /* Check the 'a' bank also */
  90         ut_assertok(gpio_lookup_name("a15", &dev, &offset, &gpio));
  91         ut_asserteq_str(dev->name, "base-gpios");
  92         ut_asserteq(15, offset);
  93         ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT + 15, gpio);
  94
  95         name = gpio_get_bank_info(dev, &offset_count);
  96         ut_asserteq_str("a", name);
  97         ut_asserteq(20, offset_count);
  98
  99         /* And the anonymous bank */
 100         ut_assertok(gpio_lookup_name("14", &dev, &offset, &gpio));
 101         ut_asserteq_str(dev->name, "gpio_sandbox");
 102         ut_asserteq(14, offset);
 103         ut_asserteq(14, gpio);
 104
 105         name = gpio_get_bank_info(dev, &offset_count);
 106         ut_asserteq_ptr(NULL, name);
 107         ut_asserteq(CONFIG_SANDBOX_GPIO_COUNT, offset_count);
 108
 109         return 0;
 110 }
 111 DM_TEST(dm_test_gpio, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);