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/drivers/net/Kconfig b/drivers/net/Kconfig
index 0dc26ac..403df5e 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -46,6 +46,16 @@
This driver is used in for testing in test/dm/mdio.c
+config MDIO_MUX_SANDBOX
+ depends on DM_MDIO_MUX && MDIO_SANDBOX
+ default y
+ bool "Sandbox: Mocked MDIO-MUX driver"
+ help
+ This driver implements dummy select/deselect ops mimicking a MUX on
+ the MDIO bux. It uses mdio_sandbox driver as parent MDIO.
+
+ This driver is used for testing in test/dm/mdio.c
+
menuconfig NETDEVICES
bool "Network device support"
depends on NET
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 4003842..3c473b2 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -37,6 +37,7 @@
obj-$(CONFIG_LPC32XX_ETH) += lpc32xx_eth.o
obj-$(CONFIG_MACB) += macb.o
obj-$(CONFIG_MCFFEC) += mcffec.o mcfmii.o
+obj-$(CONFIG_MDIO_MUX_SANDBOX) += mdio_mux_sandbox.o
obj-$(CONFIG_MPC8XX_FEC) += mpc8xx_fec.o
obj-$(CONFIG_MT7628_ETH) += mt7628-eth.o
obj-$(CONFIG_MVGBE) += mvgbe.o
diff --git a/drivers/net/mdio_mux_sandbox.c b/drivers/net/mdio_mux_sandbox.c
new file mode 100644
index 0000000..3dba4d1
--- /dev/null
+++ b/drivers/net/mdio_mux_sandbox.c
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2019
+ * Alex Marginean, NXP
+ */
+
+#include <dm.h>
+#include <errno.h>
+#include <miiphy.h>
+
+/* macros copied over from mdio_sandbox.c */
+#define SANDBOX_PHY_ADDR 5
+#define SANDBOX_PHY_REG_CNT 2
+
+struct mdio_mux_sandbox_priv {
+ int enabled;
+ int sel;
+};
+
+static int mdio_mux_sandbox_mark_selection(struct udevice *dev, int sel)
+{
+ struct udevice *mdio;
+ struct mdio_ops *ops;
+ int err;
+
+ /*
+ * find the sandbox parent mdio and write a register on the PHY there
+ * so the mux test can verify selection.
+ */
+ err = uclass_get_device_by_name(UCLASS_MDIO, "mdio-test", &mdio);
+ if (err)
+ return err;
+ ops = mdio_get_ops(mdio);
+ return ops->write(mdio, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG_CNT - 1, (u16)sel);
+}
+
+static int mdio_mux_sandbox_select(struct udevice *dev, int cur, int sel)
+{
+ struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev);
+
+ if (!priv->enabled)
+ return -ENODEV;
+
+ if (cur != priv->sel)
+ return -EINVAL;
+
+ priv->sel = sel;
+ mdio_mux_sandbox_mark_selection(dev, priv->sel);
+
+ return 0;
+}
+
+static int mdio_mux_sandbox_deselect(struct udevice *dev, int sel)
+{
+ struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev);
+
+ if (!priv->enabled)
+ return -ENODEV;
+
+ if (sel != priv->sel)
+ return -EINVAL;
+
+ priv->sel = -1;
+ mdio_mux_sandbox_mark_selection(dev, priv->sel);
+
+ return 0;
+}
+
+static const struct mdio_mux_ops mdio_mux_sandbox_ops = {
+ .select = mdio_mux_sandbox_select,
+ .deselect = mdio_mux_sandbox_deselect,
+};
+
+static int mdio_mux_sandbox_probe(struct udevice *dev)
+{
+ struct mdio_mux_sandbox_priv *priv = dev_get_priv(dev);
+
+ priv->enabled = 1;
+ priv->sel = -1;
+
+ return 0;
+}
+
+static const struct udevice_id mdio_mux_sandbox_ids[] = {
+ { .compatible = "sandbox,mdio-mux" },
+ { }
+};
+
+U_BOOT_DRIVER(mdio_mux_sandbox) = {
+ .name = "mdio_mux_sandbox",
+ .id = UCLASS_MDIO_MUX,
+ .of_match = mdio_mux_sandbox_ids,
+ .probe = mdio_mux_sandbox_probe,
+ .ops = &mdio_mux_sandbox_ops,
+ .priv_auto_alloc_size = sizeof(struct mdio_mux_sandbox_priv),
+};