test: dm: add a test for MDIO MUX DM uclass
Adds a test using a makeshift MDIO MUX. The test is based on the existing
MDIO test. It uses the last emulated PHY register to verify MUX selection.
Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/test/dm/mdio_mux.c b/test/dm/mdio_mux.c
new file mode 100644
index 0000000..f962e09
--- /dev/null
+++ b/test/dm/mdio_mux.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2019
+ * Alex Marginean, NXP
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/test.h>
+#include <misc.h>
+#include <test/ut.h>
+#include <miiphy.h>
+
+/* macros copied over from mdio_sandbox.c */
+#define SANDBOX_PHY_ADDR 5
+#define SANDBOX_PHY_REG_CNT 2
+
+#define TEST_REG_VALUE 0xabcd
+
+static int dm_test_mdio_mux(struct unit_test_state *uts)
+{
+ struct uclass *uc;
+ struct udevice *mux;
+ struct udevice *mdio_ch0, *mdio_ch1, *mdio;
+ struct mdio_ops *ops, *ops_parent;
+ struct mdio_mux_ops *mmops;
+ u16 reg;
+
+ ut_assertok(uclass_get(UCLASS_MDIO_MUX, &uc));
+
+ ut_assertok(uclass_get_device_by_name(UCLASS_MDIO_MUX, "mdio-mux-test",
+ &mux));
+
+ ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-ch-test@0",
+ &mdio_ch0));
+ ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-ch-test@1",
+ &mdio_ch1));
+
+ ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-test", &mdio));
+
+ ops = mdio_get_ops(mdio_ch0);
+ ut_assertnonnull(ops);
+ ut_assertnonnull(ops->read);
+ ut_assertnonnull(ops->write);
+
+ mmops = mdio_mux_get_ops(mux);
+ ut_assertnonnull(mmops);
+ ut_assertnonnull(mmops->select);
+
+ ops_parent = mdio_get_ops(mdio);
+ ut_assertnonnull(ops);
+ ut_assertnonnull(ops->read);
+
+ /*
+ * mux driver sets last register on the emulated PHY whenever a group
+ * is selected to the selection #. Just reading that register from
+ * either of the child buses should return the id of the child bus
+ */
+ reg = ops->read(mdio_ch0, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG_CNT - 1);
+ ut_asserteq(reg, 0);
+
+ reg = ops->read(mdio_ch1, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG_CNT - 1);
+ ut_asserteq(reg, 1);
+
+ mmops->select(mux, MDIO_MUX_SELECT_NONE, 5);
+ reg = ops_parent->read(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG_CNT - 1);
+ ut_asserteq(reg, 5);
+
+ mmops->deselect(mux, 5);
+ reg = ops_parent->read(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG_CNT - 1);
+ ut_asserteq(reg, (u16)MDIO_MUX_SELECT_NONE);
+
+ return 0;
+}
+
+DM_TEST(dm_test_mdio_mux, DM_TESTF_SCAN_FDT);