Merge branch 'BCM53xx-driver'

Florian Fainelli says:

====================
net: dsa: Broadcom BCM53xx switches support

This patch series adds support for the Broadcom BCM53xx series aka RoboSwitches.

This driver is largely based on Jonas Gorski's b53 driver for OpenWrt which can
be found here:

https://dev.openwrt.org/browser/trunk/target/linux/generic/files/drivers/net/phy/b53

a few bug fixes and DSA-ifycation later, here is what we got.

This has been successfully tested in the following configurations:

- Broadcom BCM53011 using the SRAB bus layer with 4 ports LAN, 1 port WAN

- A Broadcom BCM7445 device with an internal Starfighter 2 switch (bcm_sf2.c)
  and a Broadcom BCM53125 hanging off one of its ports connected via MDIO, creating
  two trees hanging off each other, and this works!

- A Broadcom BCM53125 MDIO connected to a Lamobo/Bananapi R1 board using the STMMAC
  MDIO driver

For now, we do not enable Broadcom tags, because there are different
generations of switches being supported which have different tag formats, but
the plan is to enable them later on.

Support for different HW features will be added later: EEE, Compact Field
Processor (TCAM) once this initial cut gets accepted.

Testing and bug reports welcome!
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/dsa/b53.txt

+Broadcom BCM53xx Ethernet switches
+==================================
+
+Required properties:
+
+- compatible: For external switch chips, compatible string must be exactly one
+  of: "brcm,bcm5325"
+      "brcm,bcm53115"
+      "brcm,bcm53125"
+      "brcm,bcm53128"
+      "brcm,bcm5365"
+      "brcm,bcm5395"
+      "brcm,bcm5397"
+      "brcm,bcm5398"
+
+  For the BCM5310x SoCs with an integrated switch, must be one of:
+      "brcm,bcm53010-srab"
+      "brcm,bcm53011-srab"
+      "brcm,bcm53012-srab"
+      "brcm,bcm53018-srab"
+      "brcm,bcm53019-srab" and the mandatory "brcm,bcm5301x-srab" string
+
+  For the BCM63xx/33xx SoCs with an integrated switch, must be one of:
+      "brcm,bcm3384-switch"
+      "brcm,bcm6328-switch"
+      "brcm,bcm6368-switch" and the mandatory "brcm,bcm63xx-switch"
+
+See Documentation/devicetree/bindings/dsa/dsa.txt for a list of additional
+required and optional properties.
+
+Examples:
+
+Ethernet switch connected via MDIO to the host, CPU port wired to eth0:
+
+	eth0: ethernet@10001000 {
+		compatible = "brcm,unimac";
+		reg = <0x10001000 0x1000>;
+
+		fixed-link {
+			speed = <1000>;
+			duplex-full;
+		};
+	};
+
+	mdio0: mdio@10000000 {
+		compatible = "brcm,unimac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		switch0: ethernet-switch@30 {
+			compatible = "brcm,bcm53125";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			ports {
+				port0@0 {
+					reg = <0>;
+					label = "lan1";
+				};
+
+				port1@1 {
+					reg = <1>;
+					label = "lan2";
+				};
+
+				port5@5 {
+					reg = <5>;
+					label = "cable-modem";
+					fixed-link {
+						speed = <1000>;
+						duplex-full;
+					};
+					phy-mode = "rgmii-txid";
+				};
+
+				port8@8 {
+					reg = <8>;
+					label = "cpu";
+					fixed-link {
+						speed = <1000>;
+						duplex-full;
+					};
+					phy-mode = "rgmii-txid";
+					ethernet = <&eth0>;
+				};
+			};
+		};
+	};

MAINTAINERS

@@ -2454,6 +2454,14 @@ L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/broadcom/b44.*
 
+BROADCOM B53 ETHERNET SWITCH DRIVER
+M:	Florian Fainelli <f.fainelli@gmail.com>
+L:	netdev@vger.kernel.org
+L:	openwrt-devel@lists.openwrt.org (subscribers-only)
+S:	Supported
+F:	drivers/net/dsa/b53/*
+F:	include/linux/platform_data/b53.h
+
 BROADCOM GENET ETHERNET DRIVER
 M:	Florian Fainelli <f.fainelli@gmail.com>
 L:	netdev@vger.kernel.org

drivers/net/dsa/Kconfig

@@ -28,4 +28,6 @@ config NET_DSA_BCM_SF2
 	  This enables support for the Broadcom Starfighter 2 Ethernet
 	  switch chips.
 
+source "drivers/net/dsa/b53/Kconfig"
+
 endmenu

drivers/net/dsa/Makefile

 obj-$(CONFIG_NET_DSA_MV88E6060) += mv88e6060.o
 obj-$(CONFIG_NET_DSA_MV88E6XXX) += mv88e6xxx.o
 obj-$(CONFIG_NET_DSA_BCM_SF2)	+= bcm_sf2.o
+
+obj-y				+= b53/

drivers/net/dsa/b53/Kconfig

+menuconfig B53
+	tristate "Broadcom BCM53xx managed switch support"
+	depends on NET_DSA
+	help
+	  This driver adds support for Broadcom managed switch chips. It supports
+	  BCM5325E, BCM5365, BCM539x, BCM53115 and BCM53125 as well as BCM63XX
+	  integrated switches.
+
+config B53_SPI_DRIVER
+	tristate "B53 SPI connected switch driver"
+	depends on B53 && SPI
+	help
+	  Select to enable support for registering switches configured through SPI.
+
+config B53_MDIO_DRIVER
+	tristate "B53 MDIO connected switch driver"
+	depends on B53
+	help
+	  Select to enable support for registering switches configured through MDIO.
+
+config B53_MMAP_DRIVER
+	tristate "B53 MMAP connected switch driver"
+	depends on B53 && HAS_IOMEM
+	help
+	  Select to enable support for memory-mapped switches like the BCM63XX
+	  integrated switches.
+
+config B53_SRAB_DRIVER
+	tristate "B53 SRAB connected switch driver"
+	depends on B53 && HAS_IOMEM
+	help
+	  Select to enable support for memory-mapped Switch Register Access
+	  Bridge Registers (SRAB) like it is found on the BCM53010

drivers/net/dsa/b53/Makefile

+obj-$(CONFIG_B53)		+= b53_common.o
+
+obj-$(CONFIG_B53_SPI_DRIVER)	+= b53_spi.o
+obj-$(CONFIG_B53_MDIO_DRIVER)	+= b53_mdio.o
+obj-$(CONFIG_B53_MMAP_DRIVER)	+= b53_mmap.o
+obj-$(CONFIG_B53_SRAB_DRIVER)	+= b53_srab.o

drivers/net/dsa/b53/b53_mdio.c

+/*
+ * B53 register access through MII registers
+ *
+ * Copyright (C) 2011-2013 Jonas Gorski <jogo@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/phy.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/brcmphy.h>
+#include <linux/rtnetlink.h>
+#include <net/dsa.h>
+
+#include "b53_priv.h"
+
+/* MII registers */
+#define REG_MII_PAGE    0x10    /* MII Page register */
+#define REG_MII_ADDR    0x11    /* MII Address register */
+#define REG_MII_DATA0   0x18    /* MII Data register 0 */
+#define REG_MII_DATA1   0x19    /* MII Data register 1 */
+#define REG_MII_DATA2   0x1a    /* MII Data register 2 */
+#define REG_MII_DATA3   0x1b    /* MII Data register 3 */
+
+#define REG_MII_PAGE_ENABLE     BIT(0)
+#define REG_MII_ADDR_WRITE      BIT(0)
+#define REG_MII_ADDR_READ       BIT(1)
+
+static int b53_mdio_op(struct b53_device *dev, u8 page, u8 reg, u16 op)
+{
+	int i;
+	u16 v;
+	int ret;
+	struct mii_bus *bus = dev->priv;
+
+	if (dev->current_page != page) {
+		/* set page number */
+		v = (page << 8) | REG_MII_PAGE_ENABLE;
+		ret = mdiobus_write_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+					   REG_MII_PAGE, v);
+		if (ret)
+			return ret;
+		dev->current_page = page;
+	}
+
+	/* set register address */
+	v = (reg << 8) | op;
+	ret = mdiobus_write_nested(bus, BRCM_PSEUDO_PHY_ADDR, REG_MII_ADDR, v);
+	if (ret)
+		return ret;
+
+	/* check if operation completed */
+	for (i = 0; i < 5; ++i) {
+		v = mdiobus_read_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+					REG_MII_ADDR);
+		if (!(v & (REG_MII_ADDR_WRITE | REG_MII_ADDR_READ)))
+			break;
+		usleep_range(10, 100);
+	}
+
+	if (WARN_ON(i == 5))
+		return -EIO;
+
+	return 0;
+}
+
+static int b53_mdio_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
+{
+	struct mii_bus *bus = dev->priv;
+	int ret;
+
+	ret = b53_mdio_op(dev, page, reg, REG_MII_ADDR_READ);
+	if (ret)
+		return ret;
+
+	*val = mdiobus_read_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+				   REG_MII_DATA0) & 0xff;
+
+	return 0;
+}
+
+static int b53_mdio_read16(struct b53_device *dev, u8 page, u8 reg, u16 *val)
+{
+	struct mii_bus *bus = dev->priv;
+	int ret;
+
+	ret = b53_mdio_op(dev, page, reg, REG_MII_ADDR_READ);
+	if (ret)
+		return ret;
+
+	*val = mdiobus_read_nested(bus, BRCM_PSEUDO_PHY_ADDR, REG_MII_DATA0);
+
+	return 0;
+}
+
+static int b53_mdio_read32(struct b53_device *dev, u8 page, u8 reg, u32 *val)
+{
+	struct mii_bus *bus = dev->priv;
+	int ret;
+
+	ret = b53_mdio_op(dev, page, reg, REG_MII_ADDR_READ);
+	if (ret)
+		return ret;
+
+	*val = mdiobus_read_nested(bus, BRCM_PSEUDO_PHY_ADDR, REG_MII_DATA0);
+	*val |= mdiobus_read_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+				    REG_MII_DATA1) << 16;
+
+	return 0;
+}
+
+static int b53_mdio_read48(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	struct mii_bus *bus = dev->priv;
+	u64 temp = 0;
+	int i;
+	int ret;
+
+	ret = b53_mdio_op(dev, page, reg, REG_MII_ADDR_READ);
+	if (ret)
+		return ret;
+
+	for (i = 2; i >= 0; i--) {
+		temp <<= 16;
+		temp |= mdiobus_read_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+				     REG_MII_DATA0 + i);
+	}
+
+	*val = temp;
+
+	return 0;
+}
+
+static int b53_mdio_read64(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	struct mii_bus *bus = dev->priv;
+	u64 temp = 0;
+	int i;
+	int ret;
+
+	ret = b53_mdio_op(dev, page, reg, REG_MII_ADDR_READ);
+	if (ret)
+		return ret;
+
+	for (i = 3; i >= 0; i--) {
+		temp <<= 16;
+		temp |= mdiobus_read_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+					    REG_MII_DATA0 + i);
+	}
+
+	*val = temp;
+
+	return 0;
+}
+
+static int b53_mdio_write8(struct b53_device *dev, u8 page, u8 reg, u8 value)
+{
+	struct mii_bus *bus = dev->priv;
+	int ret;
+
+	ret = mdiobus_write_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+				   REG_MII_DATA0, value);
+	if (ret)
+		return ret;
+
+	return b53_mdio_op(dev, page, reg, REG_MII_ADDR_WRITE);
+}
+
+static int b53_mdio_write16(struct b53_device *dev, u8 page, u8 reg,
+			    u16 value)
+{
+	struct mii_bus *bus = dev->priv;
+	int ret;
+
+	ret = mdiobus_write_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+				   REG_MII_DATA0, value);
+	if (ret)
+		return ret;
+
+	return b53_mdio_op(dev, page, reg, REG_MII_ADDR_WRITE);
+}
+
+static int b53_mdio_write32(struct b53_device *dev, u8 page, u8 reg,
+			    u32 value)
+{
+	struct mii_bus *bus = dev->priv;
+	unsigned int i;
+	u32 temp = value;
+
+	for (i = 0; i < 2; i++) {
+		int ret = mdiobus_write_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+					       REG_MII_DATA0 + i,
+					       temp & 0xffff);
+		if (ret)
+			return ret;
+		temp >>= 16;
+	}
+
+	return b53_mdio_op(dev, page, reg, REG_MII_ADDR_WRITE);
+}
+
+static int b53_mdio_write48(struct b53_device *dev, u8 page, u8 reg,
+			    u64 value)
+{
+	struct mii_bus *bus = dev->priv;
+	unsigned int i;
+	u64 temp = value;
+
+	for (i = 0; i < 3; i++) {
+		int ret = mdiobus_write_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+					       REG_MII_DATA0 + i,
+					       temp & 0xffff);
+		if (ret)
+			return ret;
+		temp >>= 16;
+	}
+
+	return b53_mdio_op(dev, page, reg, REG_MII_ADDR_WRITE);
+}
+
+static int b53_mdio_write64(struct b53_device *dev, u8 page, u8 reg,
+			    u64 value)
+{
+	struct mii_bus *bus = dev->priv;
+	unsigned int i;
+	u64 temp = value;
+
+	for (i = 0; i < 4; i++) {
+		int ret = mdiobus_write_nested(bus, BRCM_PSEUDO_PHY_ADDR,
+					       REG_MII_DATA0 + i,
+					       temp & 0xffff);
+		if (ret)
+			return ret;
+		temp >>= 16;
+	}
+
+	return b53_mdio_op(dev, page, reg, REG_MII_ADDR_WRITE);
+}
+
+static int b53_mdio_phy_read16(struct b53_device *dev, int addr, int reg,
+			       u16 *value)
+{
+	struct mii_bus *bus = dev->priv;
+
+	*value = mdiobus_read_nested(bus, addr, reg);
+
+	return 0;
+}
+
+static int b53_mdio_phy_write16(struct b53_device *dev, int addr, int reg,
+				u16 value)
+{
+	struct mii_bus *bus = dev->bus;
+
+	return mdiobus_write_nested(bus, addr, reg, value);
+}
+
+static struct b53_io_ops b53_mdio_ops = {
+	.read8 = b53_mdio_read8,
+	.read16 = b53_mdio_read16,
+	.read32 = b53_mdio_read32,
+	.read48 = b53_mdio_read48,
+	.read64 = b53_mdio_read64,
+	.write8 = b53_mdio_write8,
+	.write16 = b53_mdio_write16,
+	.write32 = b53_mdio_write32,
+	.write48 = b53_mdio_write48,
+	.write64 = b53_mdio_write64,
+	.phy_read16 = b53_mdio_phy_read16,
+	.phy_write16 = b53_mdio_phy_write16,
+};
+
+#define B53_BRCM_OUI_1	0x0143bc00
+#define B53_BRCM_OUI_2	0x03625c00
+#define B53_BRCM_OUI_3	0x00406000
+
+static int b53_mdio_probe(struct mdio_device *mdiodev)
+{
+	struct b53_device *dev;
+	u32 phy_id;
+	int ret;
+
+	/* allow the generic PHY driver to take over the non-management MDIO
+	 * addresses
+	 */
+	if (mdiodev->addr != BRCM_PSEUDO_PHY_ADDR && mdiodev->addr != 0) {
+		dev_err(&mdiodev->dev, "leaving address %d to PHY\n",
+			mdiodev->addr);
+		return -ENODEV;
+	}
+
+	/* read the first port's id */
+	phy_id = mdiobus_read(mdiodev->bus, 0, 2) << 16;
+	phy_id |= mdiobus_read(mdiodev->bus, 0, 3);
+
+	/* BCM5325, BCM539x (OUI_1)
+	 * BCM53125, BCM53128 (OUI_2)
+	 * BCM5365 (OUI_3)
+	 */
+	if ((phy_id & 0xfffffc00) != B53_BRCM_OUI_1 &&
+	    (phy_id & 0xfffffc00) != B53_BRCM_OUI_2 &&
+	    (phy_id & 0xfffffc00) != B53_BRCM_OUI_3) {
+		dev_err(&mdiodev->dev, "Unsupported device: 0x%08x\n", phy_id);
+		return -ENODEV;
+	}
+
+	/* First probe will come from SWITCH_MDIO controller on the 7445D0
+	 * switch, which will conflict with the 7445 integrated switch
+	 * pseudo-phy (we end-up programming both). In that case, we return
+	 * -EPROBE_DEFER for the first time we get here, and wait until we come
+	 * back with the slave MDIO bus which has the correct indirection
+	 * layer setup
+	 */
+	if (of_machine_is_compatible("brcm,bcm7445d0") &&
+	    strcmp(mdiodev->bus->name, "sf2 slave mii"))
+		return -EPROBE_DEFER;
+
+	dev = b53_switch_alloc(&mdiodev->dev, &b53_mdio_ops, mdiodev->bus);
+	if (!dev)
+		return -ENOMEM;
+
+	/* we don't use page 0xff, so force a page set */
+	dev->current_page = 0xff;
+	dev->bus = mdiodev->bus;
+
+	dev_set_drvdata(&mdiodev->dev, dev);
+
+	ret = b53_switch_register(dev);
+	if (ret) {
+		dev_err(&mdiodev->dev, "failed to register switch: %i\n", ret);
+		return ret;
+	}
+
+	return ret;
+}
+
+static void b53_mdio_remove(struct mdio_device *mdiodev)
+{
+	struct b53_device *dev = dev_get_drvdata(&mdiodev->dev);
+	struct dsa_switch *ds = dev->ds;
+
+	dsa_unregister_switch(ds);
+}
+
+static const struct of_device_id b53_of_match[] = {
+	{ .compatible = "brcm,bcm5325" },
+	{ .compatible = "brcm,bcm53115" },
+	{ .compatible = "brcm,bcm53125" },
+	{ .compatible = "brcm,bcm53128" },
+	{ .compatible = "brcm,bcm5365" },
+	{ .compatible = "brcm,bcm5395" },
+	{ .compatible = "brcm,bcm5397" },
+	{ .compatible = "brcm,bcm5398" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, b53_of_match);
+
+static struct mdio_driver b53_mdio_driver = {
+	.probe	= b53_mdio_probe,
+	.remove	= b53_mdio_remove,
+	.mdiodrv.driver = {
+		.name = "bcm53xx",
+		.of_match_table = b53_of_match,
+	},
+};
+
+static int __init b53_mdio_driver_register(void)
+{
+	return mdio_driver_register(&b53_mdio_driver);
+}
+module_init(b53_mdio_driver_register);
+
+static void __exit b53_mdio_driver_unregister(void)
+{
+	mdio_driver_unregister(&b53_mdio_driver);
+}
+module_exit(b53_mdio_driver_unregister);
+
+MODULE_DESCRIPTION("B53 MDIO access driver");
+MODULE_LICENSE("Dual BSD/GPL");

drivers/net/dsa/b53/b53_mmap.c

+/*
+ * B53 register access through memory mapped registers
+ *
+ * Copyright (C) 2012-2013 Jonas Gorski <jogo@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/kconfig.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/b53.h>
+
+#include "b53_priv.h"
+
+struct b53_mmap_priv {
+	void __iomem *regs;
+};
+
+static int b53_mmap_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
+{
+	u8 __iomem *regs = dev->priv;
+
+	*val = readb(regs + (page << 8) + reg);
+
+	return 0;
+}
+
+static int b53_mmap_read16(struct b53_device *dev, u8 page, u8 reg, u16 *val)
+{
+	u8 __iomem *regs = dev->priv;
+
+	if (WARN_ON(reg % 2))
+		return -EINVAL;
+
+	if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) && dev->pdata &&
+	    dev->pdata->big_endian)
+		*val = __raw_readw(regs + (page << 8) + reg);
+	else
+		*val = readw(regs + (page << 8) + reg);
+
+	return 0;
+}
+
+static int b53_mmap_read32(struct b53_device *dev, u8 page, u8 reg, u32 *val)
+{
+	u8 __iomem *regs = dev->priv;
+
+	if (WARN_ON(reg % 4))
+		return -EINVAL;
+
+	if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) && dev->pdata &&
+	    dev->pdata->big_endian)
+		*val = __raw_readl(regs + (page << 8) + reg);
+	else
+		*val = readl(regs + (page << 8) + reg);
+
+	return 0;
+}
+
+static int b53_mmap_read48(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	if (WARN_ON(reg % 2))
+		return -EINVAL;
+
+	if (reg % 4) {
+		u16 lo;
+		u32 hi;
+
+		b53_mmap_read16(dev, page, reg, &lo);
+		b53_mmap_read32(dev, page, reg + 2, &hi);
+
+		*val = ((u64)hi << 16) | lo;
+	} else {
+		u32 lo;
+		u16 hi;
+
+		b53_mmap_read32(dev, page, reg, &lo);
+		b53_mmap_read16(dev, page, reg + 4, &hi);
+
+		*val = ((u64)hi << 32) | lo;
+	}
+
+	return 0;
+}
+
+static int b53_mmap_read64(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	u32 hi, lo;
+
+	if (WARN_ON(reg % 4))
+		return -EINVAL;
+
+	b53_mmap_read32(dev, page, reg, &lo);
+	b53_mmap_read32(dev, page, reg + 4, &hi);
+
+	*val = ((u64)hi << 32) | lo;
+
+	return 0;
+}
+
+static int b53_mmap_write8(struct b53_device *dev, u8 page, u8 reg, u8 value)
+{
+	u8 __iomem *regs = dev->priv;
+
+	writeb(value, regs + (page << 8) + reg);
+
+	return 0;
+}
+
+static int b53_mmap_write16(struct b53_device *dev, u8 page, u8 reg,
+			    u16 value)
+{
+	u8 __iomem *regs = dev->priv;
+
+	if (WARN_ON(reg % 2))
+		return -EINVAL;
+
+	if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) && dev->pdata &&
+	    dev->pdata->big_endian)
+		__raw_writew(value, regs + (page << 8) + reg);
+	else
+		writew(value, regs + (page << 8) + reg);
+
+	return 0;
+}
+
+static int b53_mmap_write32(struct b53_device *dev, u8 page, u8 reg,
+			    u32 value)
+{
+	u8 __iomem *regs = dev->priv;
+
+	if (WARN_ON(reg % 4))
+		return -EINVAL;
+
+	if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) && dev->pdata &&
+	    dev->pdata->big_endian)
+		__raw_writel(value, regs + (page << 8) + reg);
+	else
+		writel(value, regs + (page << 8) + reg);
+
+	return 0;
+}
+
+static int b53_mmap_write48(struct b53_device *dev, u8 page, u8 reg,
+			    u64 value)
+{
+	if (WARN_ON(reg % 2))
+		return -EINVAL;
+
+	if (reg % 4) {
+		u32 hi = (u32)(value >> 16);
+		u16 lo = (u16)value;
+
+		b53_mmap_write16(dev, page, reg, lo);
+		b53_mmap_write32(dev, page, reg + 2, hi);
+	} else {
+		u16 hi = (u16)(value >> 32);
+		u32 lo = (u32)value;
+
+		b53_mmap_write32(dev, page, reg, lo);
+		b53_mmap_write16(dev, page, reg + 4, hi);
+	}
+
+	return 0;
+}
+
+static int b53_mmap_write64(struct b53_device *dev, u8 page, u8 reg,
+			    u64 value)
+{
+	u32 hi, lo;
+
+	hi = upper_32_bits(value);
+	lo = lower_32_bits(value);
+
+	if (WARN_ON(reg % 4))
+		return -EINVAL;
+
+	b53_mmap_write32(dev, page, reg, lo);
+	b53_mmap_write32(dev, page, reg + 4, hi);
+
+	return 0;
+}
+
+static struct b53_io_ops b53_mmap_ops = {
+	.read8 = b53_mmap_read8,
+	.read16 = b53_mmap_read16,
+	.read32 = b53_mmap_read32,
+	.read48 = b53_mmap_read48,
+	.read64 = b53_mmap_read64,
+	.write8 = b53_mmap_write8,
+	.write16 = b53_mmap_write16,
+	.write32 = b53_mmap_write32,
+	.write48 = b53_mmap_write48,
+	.write64 = b53_mmap_write64,
+};
+
+static int b53_mmap_probe(struct platform_device *pdev)
+{
+	struct b53_platform_data *pdata = pdev->dev.platform_data;
+	struct b53_device *dev;
+
+	if (!pdata)
+		return -EINVAL;
+
+	dev = b53_switch_alloc(&pdev->dev, &b53_mmap_ops, pdata->regs);
+	if (!dev)
+		return -ENOMEM;
+
+	if (pdata)
+		dev->pdata = pdata;
+
+	platform_set_drvdata(pdev, dev);
+
+	return b53_switch_register(dev);
+}
+
+static int b53_mmap_remove(struct platform_device *pdev)
+{
+	struct b53_device *dev = platform_get_drvdata(pdev);
+
+	if (dev)
+		b53_switch_remove(dev);
+
+	return 0;
+}
+
+static const struct of_device_id b53_mmap_of_table[] = {
+	{ .compatible = "brcm,bcm3384-switch" },
+	{ .compatible = "brcm,bcm6328-switch" },
+	{ .compatible = "brcm,bcm6368-switch" },
+	{ .compatible = "brcm,bcm63xx-switch" },
+	{ /* sentinel */ },
+};
+
+static struct platform_driver b53_mmap_driver = {
+	.probe = b53_mmap_probe,
+	.remove = b53_mmap_remove,
+	.driver = {
+		.name = "b53-switch",
+		.of_match_table = b53_mmap_of_table,
+	},
+};
+
+module_platform_driver(b53_mmap_driver);
+MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>");
+MODULE_DESCRIPTION("B53 MMAP access driver");
+MODULE_LICENSE("Dual BSD/GPL");

drivers/net/dsa/b53/b53_priv.h

+/*
+ * B53 common definitions
+ *
+ * Copyright (C) 2011-2013 Jonas Gorski <jogo@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef __B53_PRIV_H
+#define __B53_PRIV_H
+
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/phy.h>
+#include <net/dsa.h>
+
+#include "b53_regs.h"
+
+struct b53_device;
+struct net_device;
+
+struct b53_io_ops {
+	int (*read8)(struct b53_device *dev, u8 page, u8 reg, u8 *value);
+	int (*read16)(struct b53_device *dev, u8 page, u8 reg, u16 *value);
+	int (*read32)(struct b53_device *dev, u8 page, u8 reg, u32 *value);
+	int (*read48)(struct b53_device *dev, u8 page, u8 reg, u64 *value);
+	int (*read64)(struct b53_device *dev, u8 page, u8 reg, u64 *value);
+	int (*write8)(struct b53_device *dev, u8 page, u8 reg, u8 value);
+	int (*write16)(struct b53_device *dev, u8 page, u8 reg, u16 value);
+	int (*write32)(struct b53_device *dev, u8 page, u8 reg, u32 value);
+	int (*write48)(struct b53_device *dev, u8 page, u8 reg, u64 value);
+	int (*write64)(struct b53_device *dev, u8 page, u8 reg, u64 value);
+	int (*phy_read16)(struct b53_device *dev, int addr, int reg, u16 *value);
+	int (*phy_write16)(struct b53_device *dev, int addr, int reg, u16 value);
+};
+
+enum {
+	BCM5325_DEVICE_ID = 0x25,
+	BCM5365_DEVICE_ID = 0x65,
+	BCM5395_DEVICE_ID = 0x95,
+	BCM5397_DEVICE_ID = 0x97,
+	BCM5398_DEVICE_ID = 0x98,
+	BCM53115_DEVICE_ID = 0x53115,
+	BCM53125_DEVICE_ID = 0x53125,
+	BCM53128_DEVICE_ID = 0x53128,
+	BCM63XX_DEVICE_ID = 0x6300,
+	BCM53010_DEVICE_ID = 0x53010,
+	BCM53011_DEVICE_ID = 0x53011,
+	BCM53012_DEVICE_ID = 0x53012,
+	BCM53018_DEVICE_ID = 0x53018,
+	BCM53019_DEVICE_ID = 0x53019,
+};
+
+#define B53_N_PORTS	9
+#define B53_N_PORTS_25	6
+
+struct b53_port {
+	u16		vlan_ctl_mask;
+	struct net_device *bridge_dev;
+};
+
+struct b53_vlan {
+	u16 members;
+	u16 untag;
+	bool valid;
+};
+
+struct b53_device {
+	struct dsa_switch *ds;
+	struct b53_platform_data *pdata;
+	const char *name;
+
+	struct mutex reg_mutex;
+	struct mutex stats_mutex;
+	const struct b53_io_ops *ops;
+
+	/* chip specific data */
+	u32 chip_id;
+	u8 core_rev;
+	u8 vta_regs[3];
+	u8 duplex_reg;
+	u8 jumbo_pm_reg;
+	u8 jumbo_size_reg;
+	int reset_gpio;
+	u8 num_arl_entries;
+
+	/* used ports mask */
+	u16 enabled_ports;
+	unsigned int cpu_port;
+
+	/* connect specific data */
+	u8 current_page;
+	struct device *dev;
+
+	/* Master MDIO bus we got probed from */
+	struct mii_bus *bus;
+
+	void *priv;
+
+	/* run time configuration */
+	bool enable_jumbo;
+
+	unsigned int num_vlans;
+	struct b53_vlan *vlans;
+	unsigned int num_ports;
+	struct b53_port *ports;
+};
+
+#define b53_for_each_port(dev, i) \
+	for (i = 0; i < B53_N_PORTS; i++) \
+		if (dev->enabled_ports & BIT(i))
+
+
+static inline int is5325(struct b53_device *dev)
+{
+	return dev->chip_id == BCM5325_DEVICE_ID;
+}
+
+static inline int is5365(struct b53_device *dev)
+{
+#ifdef CONFIG_BCM47XX
+	return dev->chip_id == BCM5365_DEVICE_ID;
+#else
+	return 0;
+#endif
+}
+
+static inline int is5397_98(struct b53_device *dev)
+{
+	return dev->chip_id == BCM5397_DEVICE_ID ||
+		dev->chip_id == BCM5398_DEVICE_ID;
+}
+
+static inline int is539x(struct b53_device *dev)
+{
+	return dev->chip_id == BCM5395_DEVICE_ID ||
+		dev->chip_id == BCM5397_DEVICE_ID ||
+		dev->chip_id == BCM5398_DEVICE_ID;
+}
+
+static inline int is531x5(struct b53_device *dev)
+{
+	return dev->chip_id == BCM53115_DEVICE_ID ||
+		dev->chip_id == BCM53125_DEVICE_ID ||
+		dev->chip_id == BCM53128_DEVICE_ID;
+}
+
+static inline int is63xx(struct b53_device *dev)
+{
+#ifdef CONFIG_BCM63XX
+	return dev->chip_id == BCM63XX_DEVICE_ID;
+#else
+	return 0;
+#endif
+}
+
+static inline int is5301x(struct b53_device *dev)
+{
+	return dev->chip_id == BCM53010_DEVICE_ID ||
+		dev->chip_id == BCM53011_DEVICE_ID ||
+		dev->chip_id == BCM53012_DEVICE_ID ||
+		dev->chip_id == BCM53018_DEVICE_ID ||
+		dev->chip_id == BCM53019_DEVICE_ID;
+}
+
+#define B53_CPU_PORT_25	5
+#define B53_CPU_PORT	8
+
+static inline int is_cpu_port(struct b53_device *dev, int port)
+{
+	return dev->cpu_port;
+}
+
+struct b53_device *b53_switch_alloc(struct device *base, struct b53_io_ops *ops,
+				    void *priv);
+
+int b53_switch_detect(struct b53_device *dev);
+
+int b53_switch_register(struct b53_device *dev);
+
+static inline void b53_switch_remove(struct b53_device *dev)
+{
+	dsa_unregister_switch(dev->ds);
+}
+
+static inline int b53_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->read8(dev, page, reg, val);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_read16(struct b53_device *dev, u8 page, u8 reg, u16 *val)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->read16(dev, page, reg, val);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_read32(struct b53_device *dev, u8 page, u8 reg, u32 *val)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->read32(dev, page, reg, val);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_read48(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->read48(dev, page, reg, val);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_read64(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->read64(dev, page, reg, val);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_write8(struct b53_device *dev, u8 page, u8 reg, u8 value)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->write8(dev, page, reg, value);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_write16(struct b53_device *dev, u8 page, u8 reg,
+			      u16 value)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->write16(dev, page, reg, value);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_write32(struct b53_device *dev, u8 page, u8 reg,
+			      u32 value)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->write32(dev, page, reg, value);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_write48(struct b53_device *dev, u8 page, u8 reg,
+			      u64 value)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->write48(dev, page, reg, value);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+static inline int b53_write64(struct b53_device *dev, u8 page, u8 reg,
+			       u64 value)
+{
+	int ret;
+
+	mutex_lock(&dev->reg_mutex);
+	ret = dev->ops->write64(dev, page, reg, value);
+	mutex_unlock(&dev->reg_mutex);
+
+	return ret;
+}
+
+struct b53_arl_entry {
+	u8 port;
+	u8 mac[ETH_ALEN];
+	u16 vid;
+	u8 is_valid:1;
+	u8 is_age:1;
+	u8 is_static:1;
+};
+
+static inline void b53_mac_from_u64(u64 src, u8 *dst)
+{
+	unsigned int i;
+
+	for (i = 0; i < ETH_ALEN; i++)
+		dst[ETH_ALEN - 1 - i] = (src >> (8 * i)) & 0xff;
+}
+
+static inline u64 b53_mac_to_u64(const u8 *src)
+{
+	unsigned int i;
+	u64 dst = 0;
+
+	for (i = 0; i < ETH_ALEN; i++)
+		dst |= (u64)src[ETH_ALEN - 1 - i] << (8 * i);
+
+	return dst;
+}
+
+static inline void b53_arl_to_entry(struct b53_arl_entry *ent,
+				    u64 mac_vid, u32 fwd_entry)
+{
+	memset(ent, 0, sizeof(*ent));
+	ent->port = fwd_entry & ARLTBL_DATA_PORT_ID_MASK;
+	ent->is_valid = !!(fwd_entry & ARLTBL_VALID);
+	ent->is_age = !!(fwd_entry & ARLTBL_AGE);
+	ent->is_static = !!(fwd_entry & ARLTBL_STATIC);
+	b53_mac_from_u64(mac_vid, ent->mac);
+	ent->vid = mac_vid >> ARLTBL_VID_S;
+}
+
+static inline void b53_arl_from_entry(u64 *mac_vid, u32 *fwd_entry,
+				      const struct b53_arl_entry *ent)
+{
+	*mac_vid = b53_mac_to_u64(ent->mac);
+	*mac_vid |= (u64)(ent->vid & ARLTBL_VID_MASK) << ARLTBL_VID_S;
+	*fwd_entry = ent->port & ARLTBL_DATA_PORT_ID_MASK;
+	if (ent->is_valid)
+		*fwd_entry |= ARLTBL_VALID;
+	if (ent->is_static)
+		*fwd_entry |= ARLTBL_STATIC;
+	if (ent->is_age)
+		*fwd_entry |= ARLTBL_AGE;
+}
+
+#ifdef CONFIG_BCM47XX
+
+#include <linux/version.h>
+#include <linux/bcm47xx_nvram.h>
+#include <bcm47xx_board.h>
+static inline int b53_switch_get_reset_gpio(struct b53_device *dev)
+{
+	enum bcm47xx_board board = bcm47xx_board_get();
+
+	switch (board) {
+	case BCM47XX_BOARD_LINKSYS_WRT300NV11:
+	case BCM47XX_BOARD_LINKSYS_WRT310NV1:
+		return 8;
+	default:
+		return bcm47xx_nvram_gpio_pin("robo_reset");
+	}
+}
+#else
+static inline int b53_switch_get_reset_gpio(struct b53_device *dev)
+{
+	return -ENOENT;
+}
+#endif
+#endif

drivers/net/dsa/b53/b53_regs.h

+/*
+ * B53 register definitions
+ *
+ * Copyright (C) 2004 Broadcom Corporation
+ * Copyright (C) 2011-2013 Jonas Gorski <jogo@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef __B53_REGS_H
+#define __B53_REGS_H
+
+/* Management Port (SMP) Page offsets */
+#define B53_CTRL_PAGE			0x00 /* Control */
+#define B53_STAT_PAGE			0x01 /* Status */
+#define B53_MGMT_PAGE			0x02 /* Management Mode */
+#define B53_MIB_AC_PAGE			0x03 /* MIB Autocast */
+#define B53_ARLCTRL_PAGE		0x04 /* ARL Control */
+#define B53_ARLIO_PAGE			0x05 /* ARL Access */
+#define B53_FRAMEBUF_PAGE		0x06 /* Management frame access */
+#define B53_MEM_ACCESS_PAGE		0x08 /* Memory access */
+
+/* PHY Registers */
+#define B53_PORT_MII_PAGE(i)		(0x10 + (i)) /* Port i MII Registers */
+#define B53_IM_PORT_PAGE		0x18 /* Inverse MII Port (to EMAC) */
+#define B53_ALL_PORT_PAGE		0x19 /* All ports MII (broadcast) */
+
+/* MIB registers */
+#define B53_MIB_PAGE(i)			(0x20 + (i))
+
+/* Quality of Service (QoS) Registers */
+#define B53_QOS_PAGE			0x30
+
+/* Port VLAN Page */
+#define B53_PVLAN_PAGE			0x31
+
+/* VLAN Registers */
+#define B53_VLAN_PAGE			0x34
+
+/* Jumbo Frame Registers */
+#define B53_JUMBO_PAGE			0x40
+
+/* CFP Configuration Registers Page */
+#define B53_CFP_PAGE			0xa1
+
+/*************************************************************************
+ * Control Page registers
+ *************************************************************************/
+
+/* Port Control Register (8 bit) */
+#define B53_PORT_CTRL(i)		(0x00 + (i))
+#define   PORT_CTRL_RX_DISABLE		BIT(0)
+#define   PORT_CTRL_TX_DISABLE		BIT(1)
+#define   PORT_CTRL_RX_BCST_EN		BIT(2) /* Broadcast RX (P8 only) */
+#define   PORT_CTRL_RX_MCST_EN		BIT(3) /* Multicast RX (P8 only) */
+#define   PORT_CTRL_RX_UCST_EN		BIT(4) /* Unicast RX (P8 only) */
+#define	  PORT_CTRL_STP_STATE_S		5
+#define   PORT_CTRL_NO_STP		(0 << PORT_CTRL_STP_STATE_S)
+#define   PORT_CTRL_DIS_STATE		(1 << PORT_CTRL_STP_STATE_S)
+#define   PORT_CTRL_BLOCK_STATE		(2 << PORT_CTRL_STP_STATE_S)
+#define   PORT_CTRL_LISTEN_STATE	(3 << PORT_CTRL_STP_STATE_S)
+#define   PORT_CTRL_LEARN_STATE		(4 << PORT_CTRL_STP_STATE_S)
+#define   PORT_CTRL_FWD_STATE		(5 << PORT_CTRL_STP_STATE_S)
+#define   PORT_CTRL_STP_STATE_MASK	(0x7 << PORT_CTRL_STP_STATE_S)
+
+/* SMP Control Register (8 bit) */
+#define B53_SMP_CTRL			0x0a
+
+/* Switch Mode Control Register (8 bit) */
+#define B53_SWITCH_MODE			0x0b
+#define   SM_SW_FWD_MODE		BIT(0)	/* 1 = Managed Mode */
+#define   SM_SW_FWD_EN			BIT(1)	/* Forwarding Enable */
+
+/* IMP Port state override register (8 bit) */
+#define B53_PORT_OVERRIDE_CTRL		0x0e
+#define   PORT_OVERRIDE_LINK		BIT(0)
+#define   PORT_OVERRIDE_FULL_DUPLEX	BIT(1) /* 0 = Half Duplex */
+#define   PORT_OVERRIDE_SPEED_S		2
+#define   PORT_OVERRIDE_SPEED_10M	(0 << PORT_OVERRIDE_SPEED_S)
+#define   PORT_OVERRIDE_SPEED_100M	(1 << PORT_OVERRIDE_SPEED_S)
+#define   PORT_OVERRIDE_SPEED_1000M	(2 << PORT_OVERRIDE_SPEED_S)
+#define   PORT_OVERRIDE_RV_MII_25	BIT(4) /* BCM5325 only */
+#define   PORT_OVERRIDE_RX_FLOW		BIT(4)
+#define   PORT_OVERRIDE_TX_FLOW		BIT(5)
+#define   PORT_OVERRIDE_SPEED_2000M	BIT(6) /* BCM5301X only, requires setting 1000M */
+#define   PORT_OVERRIDE_EN		BIT(7) /* Use the register contents */
+
+/* Power-down mode control */
+#define B53_PD_MODE_CTRL_25		0x0f
+
+/* IP Multicast control (8 bit) */
+#define B53_IP_MULTICAST_CTRL		0x21
+#define  B53_IPMC_FWD_EN		BIT(1)
+#define  B53_UC_FWD_EN			BIT(6)
+#define  B53_MC_FWD_EN			BIT(7)
+
+/* (16 bit) */
+#define B53_UC_FLOOD_MASK		0x32
+#define B53_MC_FLOOD_MASK		0x34
+#define B53_IPMC_FLOOD_MASK		0x36
+
+/*
+ * Override Ports 0-7 State on devices with xMII interfaces (8 bit)
+ *
+ * For port 8 still use B53_PORT_OVERRIDE_CTRL
+ * Please note that not all ports are available on every hardware, e.g. BCM5301X
+ * don't include overriding port 6, BCM63xx also have some limitations.
+ */
+#define B53_GMII_PORT_OVERRIDE_CTRL(i)	(0x58 + (i))
+#define   GMII_PO_LINK			BIT(0)
+#define   GMII_PO_FULL_DUPLEX		BIT(1) /* 0 = Half Duplex */
+#define   GMII_PO_SPEED_S		2
+#define   GMII_PO_SPEED_10M		(0 << GMII_PO_SPEED_S)
+#define   GMII_PO_SPEED_100M		(1 << GMII_PO_SPEED_S)
+#define   GMII_PO_SPEED_1000M		(2 << GMII_PO_SPEED_S)
+#define   GMII_PO_RX_FLOW		BIT(4)
+#define   GMII_PO_TX_FLOW		BIT(5)
+#define   GMII_PO_EN			BIT(6) /* Use the register contents */
+#define   GMII_PO_SPEED_2000M		BIT(7) /* BCM5301X only, requires setting 1000M */
+
+#define B53_RGMII_CTRL_IMP		0x60
+#define   RGMII_CTRL_ENABLE_GMII	BIT(7)
+#define   RGMII_CTRL_TIMING_SEL		BIT(2)
+#define   RGMII_CTRL_DLL_RXC		BIT(1)
+#define   RGMII_CTRL_DLL_TXC		BIT(0)
+
+#define B53_RGMII_CTRL_P(i)		(B53_RGMII_CTRL_IMP + (i))
+
+/* Software reset register (8 bit) */
+#define B53_SOFTRESET			0x79
+#define   SW_RST			BIT(7)
+#define   EN_SW_RST			BIT(4)
+
+/* Fast Aging Control register (8 bit) */
+#define B53_FAST_AGE_CTRL		0x88
+#define   FAST_AGE_STATIC		BIT(0)
+#define   FAST_AGE_DYNAMIC		BIT(1)
+#define   FAST_AGE_PORT			BIT(2)
+#define   FAST_AGE_VLAN			BIT(3)
+#define   FAST_AGE_STP			BIT(4)
+#define   FAST_AGE_MC			BIT(5)
+#define   FAST_AGE_DONE			BIT(7)
+
+/* Fast Aging Port Control register (8 bit) */
+#define B53_FAST_AGE_PORT_CTRL		0x89
+
+/* Fast Aging VID Control register (16 bit) */
+#define B53_FAST_AGE_VID_CTRL		0x8a
+
+/*************************************************************************
+ * Status Page registers
+ *************************************************************************/
+
+/* Link Status Summary Register (16bit) */
+#define B53_LINK_STAT			0x00
+
+/* Link Status Change Register (16 bit) */
+#define B53_LINK_STAT_CHANGE		0x02
+
+/* Port Speed Summary Register (16 bit for FE, 32 bit for GE) */
+#define B53_SPEED_STAT			0x04
+#define  SPEED_PORT_FE(reg, port)	(((reg) >> (port)) & 1)
+#define  SPEED_PORT_GE(reg, port)	(((reg) >> 2 * (port)) & 3)
+#define  SPEED_STAT_10M			0
+#define  SPEED_STAT_100M		1
+#define  SPEED_STAT_1000M		2
+
+/* Duplex Status Summary (16 bit) */
+#define B53_DUPLEX_STAT_FE		0x06
+#define B53_DUPLEX_STAT_GE		0x08
+#define B53_DUPLEX_STAT_63XX		0x0c
+
+/* Revision ID register for BCM5325 */
+#define B53_REV_ID_25			0x50
+
+/* Strap Value (48 bit) */
+#define B53_STRAP_VALUE			0x70
+#define   SV_GMII_CTRL_115		BIT(27)
+
+/*************************************************************************
+ * Management Mode Page Registers
+ *************************************************************************/
+
+/* Global Management Config Register (8 bit) */
+#define B53_GLOBAL_CONFIG		0x00
+#define   GC_RESET_MIB			0x01
+#define   GC_RX_BPDU_EN			0x02
+#define   GC_MIB_AC_HDR_EN		0x10
+#define   GC_MIB_AC_EN			0x20
+#define   GC_FRM_MGMT_PORT_M		0xC0
+#define   GC_FRM_MGMT_PORT_04		0x00
+#define   GC_FRM_MGMT_PORT_MII		0x80
+
+/* Broadcom Header control register (8 bit) */
+#define B53_BRCM_HDR			0x03
+#define   BRCM_HDR_P8_EN		BIT(0) /* Enable tagging on port 8 */
+#define   BRCM_HDR_P5_EN		BIT(1) /* Enable tagging on port 5 */
+
+/* Device ID register (8 or 32 bit) */
+#define B53_DEVICE_ID			0x30
+
+/* Revision ID register (8 bit) */
+#define B53_REV_ID			0x40
+
+/*************************************************************************
+ * ARL Access Page Registers
+ *************************************************************************/
+
+/* VLAN Table Access Register (8 bit) */
+#define B53_VT_ACCESS			0x80
+#define B53_VT_ACCESS_9798		0x60 /* for BCM5397/BCM5398 */
+#define B53_VT_ACCESS_63XX		0x60 /* for BCM6328/62/68 */
+#define   VTA_CMD_WRITE			0
+#define   VTA_CMD_READ			1
+#define   VTA_CMD_CLEAR			2
+#define   VTA_START_CMD			BIT(7)
+
+/* VLAN Table Index Register (16 bit) */
+#define B53_VT_INDEX			0x81
+#define B53_VT_INDEX_9798		0x61
+#define B53_VT_INDEX_63XX		0x62
+
+/* VLAN Table Entry Register (32 bit) */
+#define B53_VT_ENTRY			0x83
+#define B53_VT_ENTRY_9798		0x63
+#define B53_VT_ENTRY_63XX		0x64
+#define   VTE_MEMBERS			0x1ff
+#define   VTE_UNTAG_S			9
+#define   VTE_UNTAG			(0x1ff << 9)
+
+/*************************************************************************
+ * ARL I/O Registers
+ *************************************************************************/
+
+/* ARL Table Read/Write Register (8 bit) */
+#define B53_ARLTBL_RW_CTRL		0x00
+#define    ARLTBL_RW			BIT(0)
+#define    ARLTBL_START_DONE		BIT(7)
+
+/* MAC Address Index Register (48 bit) */
+#define B53_MAC_ADDR_IDX		0x02
+
+/* VLAN ID Index Register (16 bit) */
+#define B53_VLAN_ID_IDX			0x08
+
+/* ARL Table MAC/VID Entry N Registers (64 bit)
+ *
+ * BCM5325 and BCM5365 share most definitions below
+ */
+#define B53_ARLTBL_MAC_VID_ENTRY(n)	(0x10 * (n))
+#define   ARLTBL_MAC_MASK		0xffffffffffff
+#define   ARLTBL_VID_S			48
+#define   ARLTBL_VID_MASK_25		0xff
+#define   ARLTBL_VID_MASK		0xfff
+#define   ARLTBL_DATA_PORT_ID_S_25	48
+#define   ARLTBL_DATA_PORT_ID_MASK_25	0xf
+#define   ARLTBL_AGE_25			BIT(61)
+#define   ARLTBL_STATIC_25		BIT(62)
+#define   ARLTBL_VALID_25		BIT(63)
+
+/* ARL Table Data Entry N Registers (32 bit) */
+#define B53_ARLTBL_DATA_ENTRY(n)	((0x10 * (n)) + 0x08)
+#define   ARLTBL_DATA_PORT_ID_MASK	0x1ff
+#define   ARLTBL_TC(tc)			((3 & tc) << 11)
+#define   ARLTBL_AGE			BIT(14)
+#define   ARLTBL_STATIC			BIT(15)
+#define   ARLTBL_VALID			BIT(16)
+
+/* ARL Search Control Register (8 bit) */
+#define B53_ARL_SRCH_CTL		0x50
+#define B53_ARL_SRCH_CTL_25		0x20
+#define   ARL_SRCH_VLID			BIT(0)
+#define   ARL_SRCH_STDN			BIT(7)
+
+/* ARL Search Address Register (16 bit) */
+#define B53_ARL_SRCH_ADDR		0x51
+#define B53_ARL_SRCH_ADDR_25		0x22
+#define B53_ARL_SRCH_ADDR_65		0x24
+#define  ARL_ADDR_MASK			GENMASK(14, 0)
+
+/* ARL Search MAC/VID Result (64 bit) */
+#define B53_ARL_SRCH_RSTL_0_MACVID	0x60
+
+/* Single register search result on 5325 */
+#define B53_ARL_SRCH_RSTL_0_MACVID_25	0x24
+/* Single register search result on 5365 */
+#define B53_ARL_SRCH_RSTL_0_MACVID_65	0x30
+
+/* ARL Search Data Result (32 bit) */
+#define B53_ARL_SRCH_RSTL_0		0x68
+
+#define B53_ARL_SRCH_RSTL_MACVID(x)	(B53_ARL_SRCH_RSTL_0_MACVID + ((x) * 0x10))
+#define B53_ARL_SRCH_RSTL(x)		(B53_ARL_SRCH_RSTL_0 + ((x) * 0x10))
+
+/*************************************************************************
+ * Port VLAN Registers
+ *************************************************************************/
+
+/* Port VLAN mask (16 bit) IMP port is always 8, also on 5325 & co */
+#define B53_PVLAN_PORT_MASK(i)		((i) * 2)
+
+/*************************************************************************
+ * 802.1Q Page Registers
+ *************************************************************************/
+
+/* Global QoS Control (8 bit) */
+#define B53_QOS_GLOBAL_CTL		0x00
+
+/* Enable 802.1Q for individual Ports (16 bit) */
+#define B53_802_1P_EN			0x04
+
+/*************************************************************************
+ * VLAN Page Registers
+ *************************************************************************/
+
+/* VLAN Control 0 (8 bit) */
+#define B53_VLAN_CTRL0			0x00
+#define   VC0_8021PF_CTRL_MASK		0x3
+#define   VC0_8021PF_CTRL_NONE		0x0
+#define   VC0_8021PF_CTRL_CHANGE_PRI	0x1
+#define   VC0_8021PF_CTRL_CHANGE_VID	0x2
+#define   VC0_8021PF_CTRL_CHANGE_BOTH	0x3
+#define   VC0_8021QF_CTRL_MASK		0xc
+#define   VC0_8021QF_CTRL_CHANGE_PRI	0x1
+#define   VC0_8021QF_CTRL_CHANGE_VID	0x2
+#define   VC0_8021QF_CTRL_CHANGE_BOTH	0x3
+#define   VC0_RESERVED_1		BIT(1)
+#define   VC0_DROP_VID_MISS		BIT(4)
+#define   VC0_VID_HASH_VID		BIT(5)
+#define   VC0_VID_CHK_EN		BIT(6)	/* Use VID,DA or VID,SA */
+#define   VC0_VLAN_EN			BIT(7)	/* 802.1Q VLAN Enabled */
+
+/* VLAN Control 1 (8 bit) */
+#define B53_VLAN_CTRL1			0x01
+#define   VC1_RX_MCST_TAG_EN		BIT(1)
+#define   VC1_RX_MCST_FWD_EN		BIT(2)
+#define   VC1_RX_MCST_UNTAG_EN		BIT(3)
+
+/* VLAN Control 2 (8 bit) */
+#define B53_VLAN_CTRL2			0x02
+
+/* VLAN Control 3 (8 bit when BCM5325, 16 bit else) */
+#define B53_VLAN_CTRL3			0x03
+#define B53_VLAN_CTRL3_63XX		0x04
+#define   VC3_MAXSIZE_1532		BIT(6) /* 5325 only */
+#define   VC3_HIGH_8BIT_EN		BIT(7) /* 5325 only */
+
+/* VLAN Control 4 (8 bit) */
+#define B53_VLAN_CTRL4			0x05
+#define B53_VLAN_CTRL4_25		0x04
+#define B53_VLAN_CTRL4_63XX		0x06
+#define   VC4_ING_VID_CHECK_S		6
+#define   VC4_ING_VID_CHECK_MASK	(0x3 << VC4_ING_VID_CHECK_S)
+#define   VC4_ING_VID_VIO_FWD		0 /* forward, but do not learn */
+#define   VC4_ING_VID_VIO_DROP		1 /* drop VID violations */
+#define   VC4_NO_ING_VID_CHK		2 /* do not check */
+#define   VC4_ING_VID_VIO_TO_IMP	3 /* redirect to MII port */
+
+/* VLAN Control 5 (8 bit) */
+#define B53_VLAN_CTRL5			0x06
+#define B53_VLAN_CTRL5_25		0x05
+#define B53_VLAN_CTRL5_63XX		0x07
+#define   VC5_VID_FFF_EN		BIT(2)
+#define   VC5_DROP_VTABLE_MISS		BIT(3)
+
+/* VLAN Control 6 (8 bit) */
+#define B53_VLAN_CTRL6			0x07
+#define B53_VLAN_CTRL6_63XX		0x08
+
+/* VLAN Table Access Register (16 bit) */
+#define B53_VLAN_TABLE_ACCESS_25	0x06	/* BCM5325E/5350 */
+#define B53_VLAN_TABLE_ACCESS_65	0x08	/* BCM5365 */
+#define   VTA_VID_LOW_MASK_25		0xf
+#define   VTA_VID_LOW_MASK_65		0xff
+#define   VTA_VID_HIGH_S_25		4
+#define   VTA_VID_HIGH_S_65		8
+#define   VTA_VID_HIGH_MASK_25		(0xff << VTA_VID_HIGH_S_25E)
+#define   VTA_VID_HIGH_MASK_65		(0xf << VTA_VID_HIGH_S_65)
+#define   VTA_RW_STATE			BIT(12)
+#define   VTA_RW_STATE_RD		0
+#define   VTA_RW_STATE_WR		BIT(12)
+#define   VTA_RW_OP_EN			BIT(13)
+
+/* VLAN Read/Write Registers for (16/32 bit) */
+#define B53_VLAN_WRITE_25		0x08
+#define B53_VLAN_WRITE_65		0x0a
+#define B53_VLAN_READ			0x0c
+#define   VA_MEMBER_MASK		0x3f
+#define   VA_UNTAG_S_25			6
+#define   VA_UNTAG_MASK_25		0x3f
+#define   VA_UNTAG_S_65			7
+#define   VA_UNTAG_MASK_65		0x1f
+#define   VA_VID_HIGH_S			12
+#define   VA_VID_HIGH_MASK		(0xffff << VA_VID_HIGH_S)
+#define   VA_VALID_25			BIT(20)
+#define   VA_VALID_25_R4		BIT(24)
+#define   VA_VALID_65			BIT(14)
+
+/* VLAN Port Default Tag (16 bit) */
+#define B53_VLAN_PORT_DEF_TAG(i)	(0x10 + 2 * (i))
+
+/*************************************************************************
+ * Jumbo Frame Page Registers
+ *************************************************************************/
+
+/* Jumbo Enable Port Mask (bit i == port i enabled) (32 bit) */
+#define B53_JUMBO_PORT_MASK		0x01
+#define B53_JUMBO_PORT_MASK_63XX	0x04
+#define   JPM_10_100_JUMBO_EN		BIT(24) /* GigE always enabled */
+
+/* Good Frame Max Size without 802.1Q TAG (16 bit) */
+#define B53_JUMBO_MAX_SIZE		0x05
+#define B53_JUMBO_MAX_SIZE_63XX		0x08
+#define   JMS_MIN_SIZE			1518
+#define   JMS_MAX_SIZE			9724
+
+/*************************************************************************
+ * CFP Configuration Page Registers
+ *************************************************************************/
+
+/* CFP Control Register with ports map (8 bit) */
+#define B53_CFP_CTRL			0x00
+
+#endif /* !__B53_REGS_H */

drivers/net/dsa/b53/b53_spi.c

+/*
+ * B53 register access through SPI
+ *
+ * Copyright (C) 2011-2013 Jonas Gorski <jogo@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <asm/unaligned.h>
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/platform_data/b53.h>
+
+#include "b53_priv.h"
+
+#define B53_SPI_DATA		0xf0
+
+#define B53_SPI_STATUS		0xfe
+#define B53_SPI_CMD_SPIF	BIT(7)
+#define B53_SPI_CMD_RACK	BIT(5)
+
+#define B53_SPI_CMD_READ	0x00
+#define B53_SPI_CMD_WRITE	0x01
+#define B53_SPI_CMD_NORMAL	0x60
+#define B53_SPI_CMD_FAST	0x10
+
+#define B53_SPI_PAGE_SELECT	0xff
+
+static inline int b53_spi_read_reg(struct spi_device *spi, u8 reg, u8 *val,
+				   unsigned int len)
+{
+	u8 txbuf[2];
+
+	txbuf[0] = B53_SPI_CMD_NORMAL | B53_SPI_CMD_READ;
+	txbuf[1] = reg;
+
+	return spi_write_then_read(spi, txbuf, 2, val, len);
+}
+
+static inline int b53_spi_clear_status(struct spi_device *spi)
+{
+	unsigned int i;
+	u8 rxbuf;
+	int ret;
+
+	for (i = 0; i < 10; i++) {
+		ret = b53_spi_read_reg(spi, B53_SPI_STATUS, &rxbuf, 1);
+		if (ret)
+			return ret;
+
+		if (!(rxbuf & B53_SPI_CMD_SPIF))
+			break;
+
+		mdelay(1);
+	}
+
+	if (i == 10)
+		return -EIO;
+
+	return 0;
+}
+
+static inline int b53_spi_set_page(struct spi_device *spi, u8 page)
+{
+	u8 txbuf[3];
+
+	txbuf[0] = B53_SPI_CMD_NORMAL | B53_SPI_CMD_WRITE;
+	txbuf[1] = B53_SPI_PAGE_SELECT;
+	txbuf[2] = page;
+
+	return spi_write(spi, txbuf, sizeof(txbuf));
+}
+
+static inline int b53_prepare_reg_access(struct spi_device *spi, u8 page)
+{
+	int ret = b53_spi_clear_status(spi);
+
+	if (ret)
+		return ret;
+
+	return b53_spi_set_page(spi, page);
+}
+
+static int b53_spi_prepare_reg_read(struct spi_device *spi, u8 reg)
+{
+	u8 rxbuf;
+	int retry_count;
+	int ret;
+
+	ret = b53_spi_read_reg(spi, reg, &rxbuf, 1);
+	if (ret)
+		return ret;
+
+	for (retry_count = 0; retry_count < 10; retry_count++) {
+		ret = b53_spi_read_reg(spi, B53_SPI_STATUS, &rxbuf, 1);
+		if (ret)
+			return ret;
+
+		if (rxbuf & B53_SPI_CMD_RACK)
+			break;
+
+		mdelay(1);
+	}
+
+	if (retry_count == 10)
+		return -EIO;
+
+	return 0;
+}
+
+static int b53_spi_read(struct b53_device *dev, u8 page, u8 reg, u8 *data,
+			unsigned int len)
+{
+	struct spi_device *spi = dev->priv;
+	int ret;
+
+	ret = b53_prepare_reg_access(spi, page);
+	if (ret)
+		return ret;
+
+	ret = b53_spi_prepare_reg_read(spi, reg);
+	if (ret)
+		return ret;
+
+	return b53_spi_read_reg(spi, B53_SPI_DATA, data, len);
+}
+
+static int b53_spi_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
+{
+	return b53_spi_read(dev, page, reg, val, 1);
+}
+
+static int b53_spi_read16(struct b53_device *dev, u8 page, u8 reg, u16 *val)
+{
+	int ret = b53_spi_read(dev, page, reg, (u8 *)val, 2);
+
+	if (!ret)
+		*val = le16_to_cpu(*val);
+
+	return ret;
+}
+
+static int b53_spi_read32(struct b53_device *dev, u8 page, u8 reg, u32 *val)
+{
+	int ret = b53_spi_read(dev, page, reg, (u8 *)val, 4);
+
+	if (!ret)
+		*val = le32_to_cpu(*val);
+
+	return ret;
+}
+
+static int b53_spi_read48(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	int ret;
+
+	*val = 0;
+	ret = b53_spi_read(dev, page, reg, (u8 *)val, 6);
+	if (!ret)
+		*val = le64_to_cpu(*val);
+
+	return ret;
+}
+
+static int b53_spi_read64(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	int ret = b53_spi_read(dev, page, reg, (u8 *)val, 8);
+
+	if (!ret)
+		*val = le64_to_cpu(*val);
+
+	return ret;
+}
+
+static int b53_spi_write8(struct b53_device *dev, u8 page, u8 reg, u8 value)
+{
+	struct spi_device *spi = dev->priv;
+	int ret;
+	u8 txbuf[3];
+
+	ret = b53_prepare_reg_access(spi, page);
+	if (ret)
+		return ret;
+
+	txbuf[0] = B53_SPI_CMD_NORMAL | B53_SPI_CMD_WRITE;
+	txbuf[1] = reg;
+	txbuf[2] = value;
+
+	return spi_write(spi, txbuf, sizeof(txbuf));
+}
+
+static int b53_spi_write16(struct b53_device *dev, u8 page, u8 reg, u16 value)
+{
+	struct spi_device *spi = dev->priv;
+	int ret;
+	u8 txbuf[4];
+
+	ret = b53_prepare_reg_access(spi, page);
+	if (ret)
+		return ret;
+
+	txbuf[0] = B53_SPI_CMD_NORMAL | B53_SPI_CMD_WRITE;
+	txbuf[1] = reg;
+	put_unaligned_le16(value, &txbuf[2]);
+
+	return spi_write(spi, txbuf, sizeof(txbuf));
+}
+
+static int b53_spi_write32(struct b53_device *dev, u8 page, u8 reg, u32 value)
+{
+	struct spi_device *spi = dev->priv;
+	int ret;
+	u8 txbuf[6];
+
+	ret = b53_prepare_reg_access(spi, page);
+	if (ret)
+		return ret;
+
+	txbuf[0] = B53_SPI_CMD_NORMAL | B53_SPI_CMD_WRITE;
+	txbuf[1] = reg;
+	put_unaligned_le32(value, &txbuf[2]);
+
+	return spi_write(spi, txbuf, sizeof(txbuf));
+}
+
+static int b53_spi_write48(struct b53_device *dev, u8 page, u8 reg, u64 value)
+{
+	struct spi_device *spi = dev->priv;
+	int ret;
+	u8 txbuf[10];
+
+	ret = b53_prepare_reg_access(spi, page);
+	if (ret)
+		return ret;
+
+	txbuf[0] = B53_SPI_CMD_NORMAL | B53_SPI_CMD_WRITE;
+	txbuf[1] = reg;
+	put_unaligned_le64(value, &txbuf[2]);
+
+	return spi_write(spi, txbuf, sizeof(txbuf) - 2);
+}
+
+static int b53_spi_write64(struct b53_device *dev, u8 page, u8 reg, u64 value)
+{
+	struct spi_device *spi = dev->priv;
+	int ret;
+	u8 txbuf[10];
+
+	ret = b53_prepare_reg_access(spi, page);
+	if (ret)
+		return ret;
+
+	txbuf[0] = B53_SPI_CMD_NORMAL | B53_SPI_CMD_WRITE;
+	txbuf[1] = reg;
+	put_unaligned_le64(value, &txbuf[2]);
+
+	return spi_write(spi, txbuf, sizeof(txbuf));
+}
+
+static struct b53_io_ops b53_spi_ops = {
+	.read8 = b53_spi_read8,
+	.read16 = b53_spi_read16,
+	.read32 = b53_spi_read32,
+	.read48 = b53_spi_read48,
+	.read64 = b53_spi_read64,
+	.write8 = b53_spi_write8,
+	.write16 = b53_spi_write16,
+	.write32 = b53_spi_write32,
+	.write48 = b53_spi_write48,
+	.write64 = b53_spi_write64,
+};
+
+static int b53_spi_probe(struct spi_device *spi)
+{
+	struct b53_device *dev;
+	int ret;
+
+	dev = b53_switch_alloc(&spi->dev, &b53_spi_ops, spi);
+	if (!dev)
+		return -ENOMEM;
+
+	if (spi->dev.platform_data)
+		dev->pdata = spi->dev.platform_data;
+
+	ret = b53_switch_register(dev);
+	if (ret)
+		return ret;
+
+	spi_set_drvdata(spi, dev);
+
+	return 0;
+}
+
+static int b53_spi_remove(struct spi_device *spi)
+{
+	struct b53_device *dev = spi_get_drvdata(spi);
+
+	if (dev)
+		b53_switch_remove(dev);
+
+	return 0;
+}
+
+static struct spi_driver b53_spi_driver = {
+	.driver = {
+		.name	= "b53-switch",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe	= b53_spi_probe,
+	.remove	= b53_spi_remove,
+};
+
+module_spi_driver(b53_spi_driver);
+
+MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>");
+MODULE_DESCRIPTION("B53 SPI access driver");
+MODULE_LICENSE("Dual BSD/GPL");

drivers/net/dsa/b53/b53_srab.c

+/*
+ * B53 register access through Switch Register Access Bridge Registers
+ *
+ * Copyright (C) 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/b53.h>
+
+#include "b53_priv.h"
+
+/* command and status register of the SRAB */
+#define B53_SRAB_CMDSTAT		0x2c
+#define  B53_SRAB_CMDSTAT_RST		BIT(2)
+#define  B53_SRAB_CMDSTAT_WRITE		BIT(1)
+#define  B53_SRAB_CMDSTAT_GORDYN	BIT(0)
+#define  B53_SRAB_CMDSTAT_PAGE		24
+#define  B53_SRAB_CMDSTAT_REG		16
+
+/* high order word of write data to switch registe */
+#define B53_SRAB_WD_H			0x30
+
+/* low order word of write data to switch registe */
+#define B53_SRAB_WD_L			0x34
+
+/* high order word of read data from switch register */
+#define B53_SRAB_RD_H			0x38
+
+/* low order word of read data from switch register */
+#define B53_SRAB_RD_L			0x3c
+
+/* command and status register of the SRAB */
+#define B53_SRAB_CTRLS			0x40
+#define  B53_SRAB_CTRLS_RCAREQ		BIT(3)
+#define  B53_SRAB_CTRLS_RCAGNT		BIT(4)
+#define  B53_SRAB_CTRLS_SW_INIT_DONE	BIT(6)
+
+/* the register captures interrupt pulses from the switch */
+#define B53_SRAB_INTR			0x44
+#define  B53_SRAB_INTR_P(x)		BIT(x)
+#define  B53_SRAB_SWITCH_PHY		BIT(8)
+#define  B53_SRAB_1588_SYNC		BIT(9)
+#define  B53_SRAB_IMP1_SLEEP_TIMER	BIT(10)
+#define  B53_SRAB_P7_SLEEP_TIMER	BIT(11)
+#define  B53_SRAB_IMP0_SLEEP_TIMER	BIT(12)
+
+struct b53_srab_priv {
+	void __iomem *regs;
+};
+
+static int b53_srab_request_grant(struct b53_device *dev)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	u32 ctrls;
+	int i;
+
+	ctrls = readl(regs + B53_SRAB_CTRLS);
+	ctrls |= B53_SRAB_CTRLS_RCAREQ;
+	writel(ctrls, regs + B53_SRAB_CTRLS);
+
+	for (i = 0; i < 20; i++) {
+		ctrls = readl(regs + B53_SRAB_CTRLS);
+		if (ctrls & B53_SRAB_CTRLS_RCAGNT)
+			break;
+		usleep_range(10, 100);
+	}
+	if (WARN_ON(i == 5))
+		return -EIO;
+
+	return 0;
+}
+
+static void b53_srab_release_grant(struct b53_device *dev)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	u32 ctrls;
+
+	ctrls = readl(regs + B53_SRAB_CTRLS);
+	ctrls &= ~B53_SRAB_CTRLS_RCAREQ;
+	writel(ctrls, regs + B53_SRAB_CTRLS);
+}
+
+static int b53_srab_op(struct b53_device *dev, u8 page, u8 reg, u32 op)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int i;
+	u32 cmdstat;
+
+	/* set register address */
+	cmdstat = (page << B53_SRAB_CMDSTAT_PAGE) |
+		  (reg << B53_SRAB_CMDSTAT_REG) |
+		  B53_SRAB_CMDSTAT_GORDYN |
+		  op;
+	writel(cmdstat, regs + B53_SRAB_CMDSTAT);
+
+	/* check if operation completed */
+	for (i = 0; i < 5; ++i) {
+		cmdstat = readl(regs + B53_SRAB_CMDSTAT);
+		if (!(cmdstat & B53_SRAB_CMDSTAT_GORDYN))
+			break;
+		usleep_range(10, 100);
+	}
+
+	if (WARN_ON(i == 5))
+		return -EIO;
+
+	return 0;
+}
+
+static int b53_srab_read8(struct b53_device *dev, u8 page, u8 reg, u8 *val)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	ret = b53_srab_op(dev, page, reg, 0);
+	if (ret)
+		goto err;
+
+	*val = readl(regs + B53_SRAB_RD_L) & 0xff;
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_read16(struct b53_device *dev, u8 page, u8 reg, u16 *val)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	ret = b53_srab_op(dev, page, reg, 0);
+	if (ret)
+		goto err;
+
+	*val = readl(regs + B53_SRAB_RD_L) & 0xffff;
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_read32(struct b53_device *dev, u8 page, u8 reg, u32 *val)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	ret = b53_srab_op(dev, page, reg, 0);
+	if (ret)
+		goto err;
+
+	*val = readl(regs + B53_SRAB_RD_L);
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_read48(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	ret = b53_srab_op(dev, page, reg, 0);
+	if (ret)
+		goto err;
+
+	*val = readl(regs + B53_SRAB_RD_L);
+	*val += ((u64)readl(regs + B53_SRAB_RD_H) & 0xffff) << 32;
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_read64(struct b53_device *dev, u8 page, u8 reg, u64 *val)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	ret = b53_srab_op(dev, page, reg, 0);
+	if (ret)
+		goto err;
+
+	*val = readl(regs + B53_SRAB_RD_L);
+	*val += (u64)readl(regs + B53_SRAB_RD_H) << 32;
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_write8(struct b53_device *dev, u8 page, u8 reg, u8 value)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	writel(value, regs + B53_SRAB_WD_L);
+
+	ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_write16(struct b53_device *dev, u8 page, u8 reg,
+			    u16 value)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	writel(value, regs + B53_SRAB_WD_L);
+
+	ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_write32(struct b53_device *dev, u8 page, u8 reg,
+			    u32 value)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	writel(value, regs + B53_SRAB_WD_L);
+
+	ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_write48(struct b53_device *dev, u8 page, u8 reg,
+			    u64 value)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	writel((u32)value, regs + B53_SRAB_WD_L);
+	writel((u16)(value >> 32), regs + B53_SRAB_WD_H);
+
+	ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static int b53_srab_write64(struct b53_device *dev, u8 page, u8 reg,
+			    u64 value)
+{
+	struct b53_srab_priv *priv = dev->priv;
+	u8 __iomem *regs = priv->regs;
+	int ret = 0;
+
+	ret = b53_srab_request_grant(dev);
+	if (ret)
+		goto err;
+
+	writel((u32)value, regs + B53_SRAB_WD_L);
+	writel((u32)(value >> 32), regs + B53_SRAB_WD_H);
+
+	ret = b53_srab_op(dev, page, reg, B53_SRAB_CMDSTAT_WRITE);
+
+err:
+	b53_srab_release_grant(dev);
+
+	return ret;
+}
+
+static struct b53_io_ops b53_srab_ops = {
+	.read8 = b53_srab_read8,
+	.read16 = b53_srab_read16,
+	.read32 = b53_srab_read32,
+	.read48 = b53_srab_read48,
+	.read64 = b53_srab_read64,
+	.write8 = b53_srab_write8,
+	.write16 = b53_srab_write16,
+	.write32 = b53_srab_write32,
+	.write48 = b53_srab_write48,
+	.write64 = b53_srab_write64,
+};
+
+static int b53_srab_probe(struct platform_device *pdev)
+{
+	struct b53_srab_priv *priv;
+	struct b53_device *dev;
+	struct resource *r;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->regs = devm_ioremap_resource(&pdev->dev, r);
+	if (IS_ERR(priv->regs))
+		return -ENOMEM;
+
+	dev = b53_switch_alloc(&pdev->dev, &b53_srab_ops, priv);
+	if (!dev)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, dev);
+
+	return b53_switch_register(dev);
+}
+
+static int b53_srab_remove(struct platform_device *pdev)
+{
+	struct b53_device *dev = platform_get_drvdata(pdev);
+
+	if (dev)
+		b53_switch_remove(dev);
+
+	return 0;
+}
+
+static const struct of_device_id b53_srab_of_match[] = {
+	{ .compatible = "brcm,bcm53010-srab" },
+	{ .compatible = "brcm,bcm53011-srab" },
+	{ .compatible = "brcm,bcm53012-srab" },
+	{ .compatible = "brcm,bcm53018-srab" },
+	{ .compatible = "brcm,bcm53019-srab" },
+	{ .compatible = "brcm,bcm5301x-srab" },
+	{ /* sentinel */ },
+};
+
+static struct platform_driver b53_srab_driver = {
+	.probe = b53_srab_probe,
+	.remove = b53_srab_remove,
+	.driver = {
+		.name = "b53-srab-switch",
+		.of_match_table = b53_srab_of_match,
+	},
+};
+
+module_platform_driver(b53_srab_driver);
+MODULE_AUTHOR("Hauke Mehrtens <hauke@hauke-m.de>");
+MODULE_DESCRIPTION("B53 Switch Register Access Bridge Registers (SRAB) access driver");
+MODULE_LICENSE("Dual BSD/GPL");

include/linux/platform_data/b53.h

+/*
+ * B53 platform data
+ *
+ * Copyright (C) 2013 Jonas Gorski <jogo@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef __B53_H
+#define __B53_H
+
+#include <linux/kernel.h>
+
+struct b53_platform_data {
+	u32 chip_id;
+	u16 enabled_ports;
+
+	/* only used by MMAP'd driver */
+	unsigned big_endian:1;
+	void __iomem *regs;
+};
+
+#endif