mvebu: add linux 4.9 support

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 180 insertions, 0 deletions

diff --git a/target/linux/mvebu/patches-4.9/414-phy-add-I2C-mdio-bus.patch b/target/linux/mvebu/patches-4.9/414-phy-add-I2C-mdio-bus.patch
new file mode 100644
index 0000000000..c389817c6e
--- /dev/null
+++ b/target/linux/mvebu/patches-4.9/414-phy-add-I2C-mdio-bus.patch
@@ -0,0 +1,180 @@
+From: Russell King <rmk+kernel@arm.linux.org.uk>
+Date: Fri, 25 Sep 2015 17:43:52 +0100
+Subject: [PATCH] phy: add I2C mdio bus
+
+Add an I2C MDIO bus bridge library, to allow phylib to access PHYs which
+are connected to an I2C bus instead of the more conventional MDIO bus.
+Such PHYs can be found in SFP adapters and SFF modules.
+
+Since PHYs appear at I2C bus address 0x40..0x5f, and 0x50/0x51 are
+reserved for SFP EEPROMs/diagnostics, we must not allow the MDIO bus
+to access these I2C addresses.
+
+Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
+---
+ create mode 100644 drivers/net/phy/mdio-i2c.c
+ create mode 100644 drivers/net/phy/mdio-i2c.h
+
+--- a/drivers/net/phy/Kconfig
++++ b/drivers/net/phy/Kconfig
+@@ -105,6 +105,16 @@ config MDIO_HISI_FEMAC
+ 	  This module provides a driver for the MDIO busses found in the
+ 	  Hisilicon SoC that have an Fast Ethernet MAC.
+ 
++config MDIO_I2C
++	tristate
++	depends on I2C
++	help
++	  Support I2C based PHYs.  This provides a MDIO bus bridged
++	  to I2C to allow PHYs connected in I2C mode to be accessed
++	  using the existing infrastructure.
++
++	  This is library mode.
++
+ config MDIO_MOXART
+         tristate "MOXA ART MDIO interface support"
+         depends on ARCH_MOXART
+--- a/drivers/net/phy/Makefile
++++ b/drivers/net/phy/Makefile
+@@ -33,6 +33,7 @@ obj-$(CONFIG_MDIO_BUS_MUX_MMIOREG) += md
+ obj-$(CONFIG_MDIO_CAVIUM)	+= mdio-cavium.o
+ obj-$(CONFIG_MDIO_GPIO)		+= mdio-gpio.o
+ obj-$(CONFIG_MDIO_HISI_FEMAC)	+= mdio-hisi-femac.o
++obj-$(CONFIG_MDIO_I2C)		+= mdio-i2c.o
+ obj-$(CONFIG_MDIO_MOXART)	+= mdio-moxart.o
+ obj-$(CONFIG_MDIO_OCTEON)	+= mdio-octeon.o
+ obj-$(CONFIG_MDIO_SUN4I)	+= mdio-sun4i.o
+--- /dev/null
++++ b/drivers/net/phy/mdio-i2c.c
+@@ -0,0 +1,109 @@
++/*
++ * MDIO I2C bridge
++ *
++ * Copyright (C) 2015-2016 Russell King
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * Network PHYs can appear on I2C buses when they are part of SFP module.
++ * This driver exposes these PHYs to the networking PHY code, allowing
++ * our PHY drivers access to these PHYs, and so allowing configuration
++ * of their settings.
++ */
++#include <linux/i2c.h>
++#include <linux/phy.h>
++
++#include "mdio-i2c.h"
++
++/*
++ * I2C bus addresses 0x50 and 0x51 are normally an EEPROM, which is
++ * specified to be present in SFP modules.  These correspond with PHY
++ * addresses 16 and 17.  Disallow access to these "phy" addresses.
++ */
++static bool i2c_mii_valid_phy_id(int phy_id)
++{
++	return phy_id != 0x10 && phy_id != 0x11;
++}
++
++static unsigned int i2c_mii_phy_addr(int phy_id)
++{
++	return phy_id + 0x40;
++}
++
++static int i2c_mii_read(struct mii_bus *bus, int phy_id, int reg)
++{
++	struct i2c_adapter *i2c = bus->priv;
++	struct i2c_msg msgs[2];
++	u8 data[2], dev_addr = reg;
++	int bus_addr, ret;
++
++	if (!i2c_mii_valid_phy_id(phy_id))
++		return 0xffff;
++
++	bus_addr = i2c_mii_phy_addr(phy_id);
++	msgs[0].addr = bus_addr;
++	msgs[0].flags = 0;
++	msgs[0].len = 1;
++	msgs[0].buf = &dev_addr;
++	msgs[1].addr = bus_addr;
++	msgs[1].flags = I2C_M_RD;
++	msgs[1].len = sizeof(data);
++	msgs[1].buf = data;
++
++	ret = i2c_transfer(i2c, msgs, ARRAY_SIZE(msgs));
++	if (ret != ARRAY_SIZE(msgs))
++		return 0xffff;
++
++	return data[0] << 8 | data[1];
++}
++
++static int i2c_mii_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
++{
++	struct i2c_adapter *i2c = bus->priv;
++	struct i2c_msg msg;
++	int ret;
++	u8 data[3];
++
++	if (!i2c_mii_valid_phy_id(phy_id))
++		return 0;
++
++	data[0] = reg;
++	data[1] = val >> 8;
++	data[2] = val;
++
++	msg.addr = i2c_mii_phy_addr(phy_id);
++	msg.flags = 0;
++	msg.len = 3;
++	msg.buf = data;
++
++	ret = i2c_transfer(i2c, &msg, 1);
++
++	return ret < 0 ? ret : 0;
++}
++
++struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c)
++{
++	struct mii_bus *mii;
++
++	if (!i2c_check_functionality(i2c, I2C_FUNC_I2C))
++		return ERR_PTR(-EINVAL);
++
++	mii = mdiobus_alloc();
++	if (!mii)
++		return ERR_PTR(-ENOMEM);
++
++	snprintf(mii->id, MII_BUS_ID_SIZE, "i2c:%s", dev_name(parent));
++	mii->parent = parent;
++	mii->read = i2c_mii_read;
++	mii->write = i2c_mii_write;
++	mii->priv = i2c;
++
++	return mii;
++}
++EXPORT_SYMBOL_GPL(mdio_i2c_alloc);
++
++MODULE_AUTHOR("Russell King");
++MODULE_DESCRIPTION("MDIO I2C bridge library");
++MODULE_LICENSE("GPL v2");
+--- /dev/null
++++ b/drivers/net/phy/mdio-i2c.h
+@@ -0,0 +1,19 @@
++/*
++ * MDIO I2C bridge
++ *
++ * Copyright (C) 2015 Russell King
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ */
++#ifndef MDIO_I2C_H
++#define MDIO_I2C_H
++
++struct device;
++struct i2c_adapter;
++struct mii_bus;
++
++struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c);
++
++#endif