diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.9/414-phy-add-I2C-mdio-bus.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.9/414-phy-add-I2C-mdio-bus.patch | 180 |
1 files changed, 0 insertions, 180 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 deleted file mode 100644 index c389817c6e..0000000000 --- a/target/linux/mvebu/patches-4.9/414-phy-add-I2C-mdio-bus.patch +++ /dev/null @@ -1,180 +0,0 @@ -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 |