AM33xx MUSB ~~~~~~~~~~~~~~~ - compatible: ti,am33xx-usb - reg: offset and length of the usbss register sets - ti,hwmods : must be "usb_otg_hs" The glue layer contains multiple child nodes. It is required to have at least a control module node, USB node and a PHY node. The second USB node and its PHY node are optional. The DMA node is also optional. Reset module ~~~~~~~~~~~~ - compatible: ti,am335x-usb-ctrl-module - reg: offset and length of the "USB control registers" in the "Control Module" block. A second offset and length for the USB wake up control in the same memory block. - reg-names: "phy_ctrl" for the "USB control registers" and "wakeup" for the USB wake up control register. USB PHY ~~~~~~~ compatible: ti,am335x-usb-phy reg: offset and length of the "USB PHY" register space ti,ctrl_mod: reference to the "reset module" node reg-names: phy The PHY should have a "phy" alias numbered properly in the alias node. USB ~~~ - compatible: ti,musb-am33xx - reg: offset and length of "USB Controller Registers", and offset and length of "USB Core" register space. - reg-names: control for the ""USB Controller Registers" and "mc" for "USB Core" register space - interrupts: USB interrupt number - interrupt-names: mc - dr_mode: Should be one of "host", "peripheral" or "otg". - mentor,multipoint: Should be "1" indicating the musb controller supports multipoint. This is a MUSB configuration-specific setting. - mentor,num-eps: Specifies the number of endpoints. This is also a MUSB configuration-specific setting. Should be set to "16" - mentor,ram-bits: Specifies the ram address size. Should be set to "12" - mentor,power: Should be "500". This signifies the controller can supply up to 500mA when operating in host mode. - phys: reference to the USB phy - dmas: specifies the dma channels - dma-names: specifies the names of the channels. Use "rxN" for receive and "txN" for transmit endpoints. N specifies the endpoint number. The controller should have an "usb" alias numbered properly in the alias node. DMA ~~~ - compatible: ti,am3359-cppi41 - reg: offset and length of the following register spaces: USBSS, USB CPPI DMA Controller, USB CPPI DMA Scheduler, USB Queue Manager - reg-names: glue, controller, scheduler, queuemgr - #dma-cells: should be set to 2. The first number represents the endpoint number (0 … 14 for endpoints 1 … 15 on instance 0 and 15 … 29 for endpoints 1 … 15 on instance 1). The second number is 0 for RX and 1 for TX transfers. - dma-channels: should be set to 30 representing the 15 endpoints for each USB instance. - #dma-channels: deprecated Example: ~~~~~~~~ The following example contains all the nodes as used on am335x-evm: aliases { usb0 = &usb0; usb1 = &usb1; phy0 = &usb0_phy; phy1 = &usb1_phy; }; usb: usb@47400000 { compatible = "ti,am33xx-usb"; reg = <0x47400000 0x1000>; ranges; #address-cells = <1>; #size-cells = <1>; ti,hwmods = "usb_otg_hs"; ctrl_mod: control@44e10000 { compatible = "ti,am335x-usb-ctrl-module"; reg = <0x44e10620 0x10 0x44e10648 0x4>; reg-names = "phy_ctrl", "wakeup"; }; usb0_phy: usb-phy@47401300 { compatible = "ti,am335x-usb-phy"; reg = <0x47401300 0x100>; reg-names = "phy"; ti,ctrl_mod = <&ctrl_mod>; #phy-cells = <0>; }; usb0: usb@47401000 { compatible = "ti,musb-am33xx"; reg = <0x47401400 0x400 0x47401000 0x200>; reg-names = "mc", "control"; interrupts = <18>; interrupt-names = "mc"; dr_mode = "otg" mentor,multipoint = <1>; mentor,num-eps = <16>; mentor,ram-bits = <12>; mentor,power = <500>; phys = <&usb0_phy>; dmas = <&cppi41dma 0 0 &cppi41dma 1 0 &cppi41dma 2 0 &cppi41dma 3 0 &cppi41dma 4 0 &cppi41dma 5 0 &cppi41dma 6 0 &cppi41dma 7 0 &cppi41dma 8 0 &cppi41dma 9 0 &cppi41dma 10 0 &cppi41dma 11 0 &cppi41dma 12 0 &cppi41dma 13 0 &cppi41dma 14 0 &cppi41dma 0 1 &cppi41dma 1 1 &cppi41dma 2 1 &cppi41dma 3 1 &cppi41dma 4 1 &cppi41dma 5 1 &cppi41dma 6 1 &cppi41dma 7 1 &cppi41dma 8 1 &cppi41dma 9 1 &cppi41dma 10 1 &cppi41dma 11 1 &cppi41dma 12 1 &cppi41dma 13 1 &cppi41dma 14 1>; dma-names = "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7", "rx8", "rx9", "rx10", "rx11", "rx12", "rx13", "rx14", "rx15", "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7", "tx8", "tx9", "tx10", "tx11", "tx12", "tx13", "tx14", "tx15"; }; usb1_phy: usb-phy@47401b00 { compatible = "ti,am335x-usb-phy"; reg = <0x47401b00 0x100>; reg-names = "phy"; ti,ctrl_mod = <&ctrl_mod>; #phy-cells = <0>; }; usb1: usb@47401800 { compatible = "ti,musb-am33xx"; reg = <0x47401c00 0x400 0x47401800 0x200>; reg-names = "mc", "control"; interrupts = <19>; interrupt-names = "mc"; dr_mode = "host" mentor,multipoint = <1>; mentor,num-eps = <16>; mentor,ram-bits = <12>; mentor,power = <500>; phys = <&usb1_phy>; dmas = <&cppi41dma 15 0 &cppi41dma 16 0 &cppi41dma 17 0 &cppi41dma 18 0 &cppi41dma 19 0 &cppi41dma 20 0 &cppi41dma 21 0 &cppi41dma 22 0 &cppi41dma 23 0 &cppi41dma 24 0 &cppi41dma 25 0 &cppi41dma 26 0 &cppi41dma 27 0 &cppi41dma 28 0 &cppi41dma 29 0 &cppi41dma 15 1 &cppi41dma 16 1 &cppi41dma 17 1 &cppi41dma 18 1 &cppi41dma 19 1 &cppi41dma 20 1 &cppi41dma 21 1 &cppi41dma 22 1 &cppi41dma 23 1 &cppi41dma 24 1 &cppi41dma 25 1 &cppi41dma 26 1 &cppi41dma 27 1 &cppi41dma 28 1 &cppi41dma 29 1>; dma-names = "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7", "rx8", "rx9", "rx10", "rx11", "rx12", "rx13", "rx14", "rx15", "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7", "tx8", "tx9", "tx10", "tx11", "tx12", "tx13", "tx14", "tx15"; }; cppi41dma: dma-controller@7402000 { compatible = "ti,am3359-cppi41"; reg = <0x47400000 0x1000 0x47402000 0x1000 0x47403000 0x1000 0x47404000 0x4000>; reg-names = "glue", "controller", "scheduler", "queuemgr"; interrupts = <17>; interrupt-names = "glue"; #dma-cells = <2>; dma-channels = <30>; dma-requests = <256>; }; };