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1 | /** | |||
2 | * @file test_gpiochip.cpp | |||
3 | * | |||
4 | * @date Mar 12, 2019 | |||
5 | */ | |||
6 | ||||
7 | #include "pch.h" | |||
8 | ||||
9 | #include "gpio/gpio_ext.h" | |||
10 | ||||
11 | using ::testing::_; | |||
12 | ||||
13 | static int io_state = 0; | |||
14 | ||||
15 | static int initcalls = 0; | |||
16 | struct GoodChip : public GpioChip { | |||
17 | 2 | int init() override { | ||
18 | 2 | initcalls++; | ||
19 | 2 | return 0; | ||
20 | } | |||
21 | }; | |||
22 | ||||
23 | class TestChip1 : public GoodChip { | |||
24 | 2 | int readPad(size_t pin) override { | ||
25 |
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2 | if (pin & 0x01) |
26 | 1 | return 1; | ||
27 | 1 | return 0; | ||
28 | } | |||
29 | }; | |||
30 | ||||
31 | static TestChip1 testchip1; | |||
32 | ||||
33 | class TestChip2 : public GoodChip { | |||
34 | 2 | int writePad(size_t pin, int value) override { | ||
35 |
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2 | if (value) |
36 | 1 | io_state |= (1 << value); | ||
37 | else | |||
38 | 1 | io_state &= ~(1 << value); | ||
39 | ||||
40 | 2 | return 0; | ||
41 | } | |||
42 | }; | |||
43 | ||||
44 | static TestChip2 testchip2; | |||
45 | ||||
46 | static int calls_to_failed_chip = 0; | |||
47 | // This chip fails to start | |||
48 | class TestChip3 : public GpioChip { | |||
49 | ✗ | int writePad(size_t pin, int value) override { | ||
50 | ✗ | calls_to_failed_chip++; | ||
51 | ✗ | return 0; | ||
52 | } | |||
53 | ||||
54 | 1 | int init() override { | ||
55 | 1 | return -1; | ||
56 | } | |||
57 | }; | |||
58 | ||||
59 | static TestChip3 testchip3; | |||
60 | ||||
61 | 4 | TEST(gpioext, testGpioExt) { | ||
62 | 1 | int ret; | ||
63 | int chip1_base, chip2_base, chip3_base; | |||
64 | ||||
65 |
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1 | printf("====================================================================================== testGpioExt\r\n"); | |
66 | ||||
67 | /* should fail to register chip with zero gpios */ | |||
68 |
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1 | EXPECT_FALSE(gpiochip_register((brain_pin_e)(BRAIN_PIN_ONCHIP_LAST + 1), "invalid", testchip1, 0) > 0); | |
69 | ||||
70 | /* should fail to register chip with base overlapig on-chip gpios */ | |||
71 |
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1 | EXPECT_FALSE(gpiochip_register((brain_pin_e)(BRAIN_PIN_ONCHIP_LAST - 1), "invalid", testchip1, 0) > 0); | |
72 | ||||
73 |
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1 | chip1_base = gpiochip_register((brain_pin_e)(BRAIN_PIN_ONCHIP_LAST + 1), "input only", testchip1, 16); | |
74 |
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1 | EXPECT_TRUE(chip1_base > 0); | |
75 | ||||
76 |
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1 | EXPECT_EQ(16, gpiochips_get_total_pins()); | |
77 | ||||
78 | /* should fail to register chip overlapping other one */ | |||
79 |
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1 | EXPECT_FALSE(gpiochip_register((brain_pin_e)(BRAIN_PIN_ONCHIP_LAST + 1 + 15), "output only", testchip2, 16) > 0); | |
80 | ||||
81 |
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1 | chip2_base = gpiochip_register((brain_pin_e)(BRAIN_PIN_ONCHIP_LAST + 1 + 16), "output only", testchip2, 16); | |
82 |
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1 | EXPECT_TRUE(chip2_base > 0); | |
83 | ||||
84 | /* this chip will fail to init, but should be registered without errors */ | |||
85 |
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1 | chip3_base = gpiochip_register((brain_pin_e)(BRAIN_PIN_ONCHIP_LAST + 1 + 16 + 16), "failed chip", testchip3, 16); | |
86 |
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1 | EXPECT_TRUE(chip2_base > 0); | |
87 | ||||
88 |
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1 | EXPECT_EQ(48, gpiochips_get_total_pins()); | |
89 | ||||
90 | /* init 3 chips, one will fail */ | |||
91 |
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1 | ret = gpiochips_init(); | |
92 |
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1 | EXPECT_EQ(32, ret); | |
93 | ||||
94 | /* two drivers should be inited */ | |||
95 |
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1 | EXPECT_EQ(2, initcalls); | |
96 | ||||
97 | /* gpio reads */ | |||
98 |
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1 | EXPECT_TRUE(gpiochips_readPad((Gpio)(chip1_base + 0)) == 0); | |
99 |
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1 | EXPECT_TRUE(gpiochips_readPad((Gpio)(chip1_base + 1)) != 0); | |
100 | ||||
101 | /* gpio write */ | |||
102 |
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1 | gpiochips_writePad((Gpio)(chip2_base + 0), 0); | |
103 |
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1 | gpiochips_writePad((Gpio)(chip2_base + 1), 1); | |
104 |
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1 | EXPECT_EQ(0x02, io_state); | |
105 | ||||
106 | /* try to access failed chip */ | |||
107 |
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1 | EXPECT_ANY_THROW(gpiochips_writePad((Gpio)(chip3_base + 0), 0)); | |
108 |
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1 | EXPECT_ANY_THROW(gpiochips_writePad((Gpio)(chip3_base + 1), 1)); | |
109 |
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1 | EXPECT_EQ(0, calls_to_failed_chip); | |
110 | ||||
111 | // todo: make readPad fail in a similar way? | |||
112 | ||||
113 | /* read/write outside range */ | |||
114 |
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1 | EXPECT_TRUE(gpiochips_readPad((Gpio)(chip1_base - 1)) < 0); | |
115 |
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1 | EXPECT_ANY_THROW(gpiochips_writePad((Gpio)(chip1_base - 1), 1)); | |
116 | ||||
117 |
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1 | EXPECT_TRUE(gpiochips_readPad((Gpio)(chip3_base + 16)) < 0); | |
118 |
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1 | EXPECT_ANY_THROW(gpiochips_writePad((Gpio)(chip3_base + 16), 1)); | |
119 | ||||
120 | 1 | } | ||
121 |