1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2019
4 * Alex Marginean, NXP
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <miiphy.h>
10 #include <misc.h>
11 #include <dm/test.h>
12 #include <test/test.h>
13 #include <test/ut.h>
14
15 /* macros copied over from mdio_sandbox.c */
16 #define SANDBOX_PHY_ADDR 5
17 #define SANDBOX_PHY_REG_CNT 2
18
19 #define TEST_REG_VALUE 0xabcd
20
dm_test_mdio_mux(struct unit_test_state * uts)21 static int dm_test_mdio_mux(struct unit_test_state *uts)
22 {
23 struct uclass *uc;
24 struct udevice *mux;
25 struct udevice *mdio_ch0, *mdio_ch1, *mdio;
26 struct mdio_ops *ops, *ops_parent;
27 struct mdio_mux_ops *mmops;
28 u16 reg;
29
30 ut_assertok(uclass_get(UCLASS_MDIO_MUX, &uc));
31
32 ut_assertok(uclass_get_device_by_name(UCLASS_MDIO_MUX, "mdio-mux-test",
33 &mux));
34
35 ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-ch-test@0",
36 &mdio_ch0));
37 ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-ch-test@1",
38 &mdio_ch1));
39
40 ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-test", &mdio));
41
42 ops = mdio_get_ops(mdio_ch0);
43 ut_assertnonnull(ops);
44 ut_assertnonnull(ops->read);
45 ut_assertnonnull(ops->write);
46
47 mmops = mdio_mux_get_ops(mux);
48 ut_assertnonnull(mmops);
49 ut_assertnonnull(mmops->select);
50
51 ops_parent = mdio_get_ops(mdio);
52 ut_assertnonnull(ops);
53 ut_assertnonnull(ops->read);
54
55 /*
56 * mux driver sets last register on the emulated PHY whenever a group
57 * is selected to the selection #. Just reading that register from
58 * either of the child buses should return the id of the child bus
59 */
60 reg = ops->read(mdio_ch0, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
61 SANDBOX_PHY_REG_CNT - 1);
62 ut_asserteq(reg, 0);
63
64 reg = ops->read(mdio_ch1, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
65 SANDBOX_PHY_REG_CNT - 1);
66 ut_asserteq(reg, 1);
67
68 mmops->select(mux, MDIO_MUX_SELECT_NONE, 5);
69 reg = ops_parent->read(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
70 SANDBOX_PHY_REG_CNT - 1);
71 ut_asserteq(reg, 5);
72
73 mmops->deselect(mux, 5);
74 reg = ops_parent->read(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
75 SANDBOX_PHY_REG_CNT - 1);
76 ut_asserteq(reg, (u16)MDIO_MUX_SELECT_NONE);
77
78 return 0;
79 }
80
81 DM_TEST(dm_test_mdio_mux, UT_TESTF_SCAN_FDT);
82