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net: phy: Add Synopsys DesignWare XPCS MDIO module

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Synopsys DesignWare XPCS is an MMD that can manage link status,
auto-negotiation, link training, ...

In this commit we add basic support for XPCS using USXGMII interface and
Clause 73 Auto-negotiation.

This is highly tied with PHYLINK and can't be used without it. A given
ethernet driver can use the provided callbacks to add the support for
XPCS.

Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jose Abreu
2020-03-09 20:13:16 -07:00
committed by David S. Miller
parent 9414819654
commit fcb26bd2b6
5 changed files with 667 additions and 0 deletions
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MAINTAINERS
+7
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@@ -16117,6 +16117,13 @@ L: netdev@vger.kernel.org
S: Supported
F: drivers/net/ethernet/synopsys/
SYNOPSYS DESIGNWARE ETHERNET XPCS DRIVER
M: Jose Abreu <Jose.Abreu@synopsys.com>
L: netdev@vger.kernel.org
S: Supported
F: drivers/net/phy/mdio-xpcs.c
F: include/linux/mdio-xpcs.h
SYNOPSYS DESIGNWARE I2C DRIVER
M: Jarkko Nikula <jarkko.nikula@linux.intel.com>
R: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
drivers/net/phy/Kconfig
+6
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@@ -214,6 +214,12 @@ config MDIO_XGENE
This module provides a driver for the MDIO busses found in the
APM X-Gene SoC's.
config MDIO_XPCS
tristate "Synopsys DesignWare XPCS controller"
help
This module provides helper functions for Synopsys DesignWare XPCS
controllers.
endif
endif
drivers/net/phy/Makefile
+1
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@@ -44,6 +44,7 @@ obj-$(CONFIG_MDIO_OCTEON) += mdio-octeon.o
obj-$(CONFIG_MDIO_SUN4I) += mdio-sun4i.o
obj-$(CONFIG_MDIO_THUNDER) += mdio-thunder.o
obj-$(CONFIG_MDIO_XGENE) += mdio-xgene.o
obj-$(CONFIG_MDIO_XPCS) += mdio-xpcs.o
obj-$(CONFIG_NETWORK_PHY_TIMESTAMPING) += mii_timestamper.o
drivers/net/phy/mdio-xpcs.c
+612
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File diff suppressed because it is too large Load Diff
include/linux/mdio-xpcs.h
+41
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@@ -0,0 +1,41 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2020 Synopsys, Inc. and/or its affiliates.
* Synopsys DesignWare XPCS helpers
*/
#ifndef __LINUX_MDIO_XPCS_H
#define __LINUX_MDIO_XPCS_H
#include <linux/phy.h>
#include <linux/phylink.h>
struct mdio_xpcs_args {
__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
struct mii_bus *bus;
int addr;
};
struct mdio_xpcs_ops {
int (*validate)(struct mdio_xpcs_args *xpcs,
unsigned long *supported,
struct phylink_link_state *state);
int (*config)(struct mdio_xpcs_args *xpcs,
const struct phylink_link_state *state);
int (*get_state)(struct mdio_xpcs_args *xpcs,
struct phylink_link_state *state);
int (*link_up)(struct mdio_xpcs_args *xpcs, int speed,
phy_interface_t interface);
int (*probe)(struct mdio_xpcs_args *xpcs, phy_interface_t interface);
};
#if IS_ENABLED(CONFIG_MDIO_XPCS)
struct mdio_xpcs_ops *mdio_xpcs_get_ops(void);
#else
static inline struct mdio_xpcs_ops *mdio_xpcs_get_ops(void)
{
return NULL;
}
#endif
#endif /* __LINUX_MDIO_XPCS_H */