drivers/net/phy: add fixed-phy / fixed-link support
This patch adds support for having a "fixed-link" to some other MAC
(like some embedded switch-device).
For this purpose we introduce a new phy-driver, called "Fixed PHY".
Fixed PHY works only with CONFIG_DM_ETH enabled, since the fixed-link is
described with a subnode below ethernet interface.
Most ethernet drivers (unfortunately not all are following same scheme
for searching/attaching phys) are calling "phy_connect(...)" for getting
a phy-device.
At this point we link in, we search here for a subnode called "fixed-
link", once found we start phy_device_create(...) with the special phy-
id PHY_FIXED_ID (0xa5a55a5a).
During init the "Fixed PHY" driver has registered with this id and now
gets probed, during probe we get all the details about fixed-link out of
dts, later on the phy reports this values.
Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 1d514e9..e562a8a 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -90,4 +90,14 @@
config PHY_XILINX
bool "Xilinx Ethernet PHYs support"
+config PHY_FIXED
+ bool "Fixed-Link PHY"
+ depends on DM_ETH
+ help
+ Fixed PHY is used for having a 'fixed-link' to another MAC with a direct
+ connection (MII, RGMII, ...).
+ There is nothing like autoneogation and so
+ on, the link is always up with fixed speed and fixed duplex-setting.
+ More information: doc/device-tree-bindings/net/fixed-link.txt
+
endif #PHYLIB
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index d372971..88c00a5 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -28,3 +28,4 @@
obj-$(CONFIG_PHY_XILINX) += xilinx_phy.o
obj-$(CONFIG_PHY_VITESSE) += vitesse.o
obj-$(CONFIG_PHY_MSCC) += mscc.o
+obj-$(CONFIG_PHY_FIXED) += fixed.o
diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c
new file mode 100644
index 0000000..df82356
--- /dev/null
+++ b/drivers/net/phy/fixed.c
@@ -0,0 +1,82 @@
+/*
+ * Fixed-Link phy
+ *
+ * Copyright 2017 Bernecker & Rainer Industrieelektronik GmbH
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <phy.h>
+#include <dm.h>
+#include <fdt_support.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int fixedphy_probe(struct phy_device *phydev)
+{
+ struct fixed_link *priv;
+ int ofnode = phydev->addr;
+ u32 val;
+
+ /* check for mandatory properties within fixed-link node */
+ val = fdt_getprop_u32_default_node(gd->fdt_blob,
+ ofnode, 0, "speed", 0);
+ if (val != SPEED_10 && val != SPEED_100 && val != SPEED_1000) {
+ printf("ERROR: no/invalid speed given in fixed-link node!");
+ return -EINVAL;
+ }
+
+ priv = malloc(sizeof(*priv));
+ if (!priv)
+ return -ENOMEM;
+ memset(priv, 0, sizeof(*priv));
+
+ phydev->priv = priv;
+ phydev->addr = 0;
+
+ priv->link_speed = val;
+ priv->duplex = fdtdec_get_bool(gd->fdt_blob, ofnode, "full-duplex");
+ priv->pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "pause");
+ priv->asym_pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "asym-pause");
+
+ /* fixed-link phy must not be reset by core phy code */
+ phydev->flags |= PHY_FLAG_BROKEN_RESET;
+
+ return 0;
+}
+
+int fixedphy_startup(struct phy_device *phydev)
+{
+ struct fixed_link *priv = phydev->priv;
+
+ phydev->asym_pause = priv->asym_pause;
+ phydev->pause = priv->pause;
+ phydev->duplex = priv->duplex;
+ phydev->speed = priv->link_speed;
+ phydev->link = 1;
+
+ return 0;
+}
+
+int fixedphy_shutdown(struct phy_device *phydev)
+{
+ return 0;
+}
+
+static struct phy_driver fixedphy_driver = {
+ .uid = PHY_FIXED_ID,
+ .mask = 0xffffffff,
+ .name = "Fixed PHY",
+ .features = PHY_GBIT_FEATURES | SUPPORTED_MII,
+ .probe = fixedphy_probe,
+ .startup = fixedphy_startup,
+ .shutdown = fixedphy_shutdown,
+};
+
+int phy_fixed_init(void)
+{
+ phy_register(&fixedphy_driver);
+ return 0;
+}
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 8db6574..8bacd99 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -515,7 +515,9 @@
#ifdef CONFIG_PHY_MSCC
phy_mscc_init();
#endif
-
+#ifdef CONFIG_PHY_FIXED
+ phy_fixed_init();
+#endif
return 0;
}
@@ -854,9 +856,24 @@
struct eth_device *dev, phy_interface_t interface)
#endif
{
- struct phy_device *phydev;
+ struct phy_device *phydev = NULL;
+#ifdef CONFIG_PHY_FIXED
+ int sn;
+ const char *name;
+ sn = fdt_first_subnode(gd->fdt_blob, dev->of_offset);
+ while (sn > 0) {
+ name = fdt_get_name(gd->fdt_blob, sn, NULL);
+ if (name != NULL && strcmp(name, "fixed-link") == 0) {
+ phydev = phy_device_create(bus,
+ sn, PHY_FIXED_ID, interface);
+ break;
+ }
+ sn = fdt_next_subnode(gd->fdt_blob, sn);
+ }
+#endif
+ if (phydev == NULL)
+ phydev = phy_find_by_mask(bus, 1 << addr, interface);
- phydev = phy_find_by_mask(bus, 1 << addr, interface);
if (phydev)
phy_connect_dev(phydev, dev);
else