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net: dsa: b53: Add support for Broadcom RoboSwitch
This patch adds support for Broadcom's BCM53xx switch family, also known as RoboSwitch. Some of these switches are ubiquituous, found in home routers, Wi-Fi routers, DSL and cable modem gateways and other networking related products. This drivers adds the library driver (b53_common.c) as well as a few bus glue drivers for MDIO, SPI, Switch Register Access Block (SRAB) and memory-mapped I/O into a SoC's address space (Broadcom BCM63xx/33xx). Basic operations are supported to bring the Layer 1/2 up and running, but not much more at this point, subsequent patches add the remaining features. Signed-off-by: Florian Fainelli <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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‎Documentation/devicetree/bindings/net/dsa/b53.txt

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

‎MAINTAINERS

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S: Supported
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F: drivers/net/ethernet/broadcom/b44.*
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BROADCOM B53 ETHERNET SWITCH DRIVER
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M: Florian Fainelli <[email protected]>
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L: [email protected]
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L: [email protected] (subscribers-only)
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S: Supported
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F: drivers/net/dsa/b53/*
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F: include/linux/platform_data/b53.h
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BROADCOM GENET ETHERNET DRIVER
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M: Florian Fainelli <[email protected]>
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L: [email protected]

‎drivers/net/dsa/Kconfig

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This enables support for the Broadcom Starfighter 2 Ethernet
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switch chips.
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source "drivers/net/dsa/b53/Kconfig"
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endmenu

‎drivers/net/dsa/Makefile

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

‎drivers/net/dsa/b53/Kconfig

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

‎drivers/net/dsa/b53/Makefile

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

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