198 lines
5.8 KiB
Plaintext
198 lines
5.8 KiB
Plaintext
AM33xx MUSB
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~~~~~~~~~~~~~~~
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- compatible: ti,am33xx-usb
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- reg: offset and length of the usbss register sets
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- ti,hwmods : must be "usb_otg_hs"
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The glue layer contains multiple child nodes. It is required the have
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at least a control module node, USB node and a PHY node. The second USB
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node and its PHY node is optional. The DMA node is also optional.
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Reset module
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~~~~~~~~~~~~
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- compatible: ti,am335x-usb-ctrl-module
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- reg: offset and length of the "USB control registers" in the "Control
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Module" block. A second offset and length for the USB wake up control
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in the same memory block.
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- reg-names: "phy_ctrl" for the "USB control registers" and "wakeup" for
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the USB wake up control register.
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USB PHY
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~~~~~~~
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compatible: ti,am335x-usb-phy
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reg: offset and length of the "USB PHY" register space
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ti,ctrl_mod: reference to the "reset module" node
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reg-names: phy
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The PHY should have a "phy" alias numbered properly in the alias
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node.
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USB
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~~~
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- compatible: ti,musb-am33xx
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- reg: offset and length of "USB Controller Registers", and offset and
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length of "USB Core" register space.
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- reg-names: control for the ""USB Controller Registers" and "mc" for
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"USB Core" register space
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- interrupts: USB interrupt number
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- interrupt-names: mc
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- dr_mode: Should be one of "host", "peripheral" or "otg".
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- mentor,multipoint: Should be "1" indicating the musb controller supports
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multipoint. This is a MUSB configuration-specific setting.
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- mentor,num-eps: Specifies the number of endpoints. This is also a
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MUSB configuration-specific setting. Should be set to "16"
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- mentor,ram-bits: Specifies the ram address size. Should be set to "12"
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- mentor,power: Should be "500". This signifies the controller can supply up to
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500mA when operating in host mode.
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- phys: reference to the USB phy
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- dmas: specifies the dma channels
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- dma-names: specifies the names of the channels. Use "rxN" for receive
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and "txN" for transmit endpoints. N specifies the endpoint number.
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The controller should have an "usb" alias numbered properly in the alias
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node.
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DMA
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~~~
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- compatible: ti,am3359-cppi41
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- reg: offset and length of the following register spaces: USBSS, USB
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CPPI DMA Controller, USB CPPI DMA Scheduler, USB Queue Manager
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- reg-names: glue, controller, scheduler, queuemgr
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- #dma-cells: should be set to 2. The first number represents the
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endpoint number (0 … 14 for endpoints 1 … 15 on instance 0 and 15 … 29
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for endpoints 1 … 15 on instance 1). The second number is 0 for RX and
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1 for TX transfers.
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- #dma-channels: should be set to 30 representing the 15 endpoints for
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each USB instance.
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Example:
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~~~~~~~~
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The following example contains all the nodes as used on am335x-evm:
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aliases {
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usb0 = &usb0;
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usb1 = &usb1;
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phy0 = &usb0_phy;
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phy1 = &usb1_phy;
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};
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usb: usb@47400000 {
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compatible = "ti,am33xx-usb";
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reg = <0x47400000 0x1000>;
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ranges;
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#address-cells = <1>;
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#size-cells = <1>;
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ti,hwmods = "usb_otg_hs";
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ctrl_mod: control@44e10000 {
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compatible = "ti,am335x-usb-ctrl-module";
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reg = <0x44e10620 0x10
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0x44e10648 0x4>;
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reg-names = "phy_ctrl", "wakeup";
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};
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usb0_phy: usb-phy@47401300 {
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compatible = "ti,am335x-usb-phy";
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reg = <0x47401300 0x100>;
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reg-names = "phy";
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ti,ctrl_mod = <&ctrl_mod>;
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};
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usb0: usb@47401000 {
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compatible = "ti,musb-am33xx";
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reg = <0x47401400 0x400
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0x47401000 0x200>;
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reg-names = "mc", "control";
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interrupts = <18>;
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interrupt-names = "mc";
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dr_mode = "otg"
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mentor,multipoint = <1>;
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mentor,num-eps = <16>;
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mentor,ram-bits = <12>;
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mentor,power = <500>;
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phys = <&usb0_phy>;
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dmas = <&cppi41dma 0 0 &cppi41dma 1 0
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&cppi41dma 2 0 &cppi41dma 3 0
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&cppi41dma 4 0 &cppi41dma 5 0
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&cppi41dma 6 0 &cppi41dma 7 0
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&cppi41dma 8 0 &cppi41dma 9 0
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&cppi41dma 10 0 &cppi41dma 11 0
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&cppi41dma 12 0 &cppi41dma 13 0
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&cppi41dma 14 0 &cppi41dma 0 1
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&cppi41dma 1 1 &cppi41dma 2 1
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&cppi41dma 3 1 &cppi41dma 4 1
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&cppi41dma 5 1 &cppi41dma 6 1
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&cppi41dma 7 1 &cppi41dma 8 1
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&cppi41dma 9 1 &cppi41dma 10 1
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&cppi41dma 11 1 &cppi41dma 12 1
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&cppi41dma 13 1 &cppi41dma 14 1>;
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dma-names =
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"rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
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"rx8", "rx9", "rx10", "rx11", "rx12", "rx13",
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"rx14", "rx15",
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"tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
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"tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
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"tx14", "tx15";
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};
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usb1_phy: usb-phy@47401b00 {
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compatible = "ti,am335x-usb-phy";
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reg = <0x47401b00 0x100>;
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reg-names = "phy";
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ti,ctrl_mod = <&ctrl_mod>;
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};
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usb1: usb@47401800 {
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compatible = "ti,musb-am33xx";
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reg = <0x47401c00 0x400
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0x47401800 0x200>;
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reg-names = "mc", "control";
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interrupts = <19>;
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interrupt-names = "mc";
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dr_mode = "host"
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mentor,multipoint = <1>;
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mentor,num-eps = <16>;
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mentor,ram-bits = <12>;
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mentor,power = <500>;
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phys = <&usb1_phy>;
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dmas = <&cppi41dma 15 0 &cppi41dma 16 0
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&cppi41dma 17 0 &cppi41dma 18 0
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&cppi41dma 19 0 &cppi41dma 20 0
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&cppi41dma 21 0 &cppi41dma 22 0
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&cppi41dma 23 0 &cppi41dma 24 0
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&cppi41dma 25 0 &cppi41dma 26 0
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&cppi41dma 27 0 &cppi41dma 28 0
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&cppi41dma 29 0 &cppi41dma 15 1
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&cppi41dma 16 1 &cppi41dma 17 1
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&cppi41dma 18 1 &cppi41dma 19 1
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&cppi41dma 20 1 &cppi41dma 21 1
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&cppi41dma 22 1 &cppi41dma 23 1
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&cppi41dma 24 1 &cppi41dma 25 1
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&cppi41dma 26 1 &cppi41dma 27 1
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&cppi41dma 28 1 &cppi41dma 29 1>;
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dma-names =
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"rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
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"rx8", "rx9", "rx10", "rx11", "rx12", "rx13",
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"rx14", "rx15",
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"tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
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"tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
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"tx14", "tx15";
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};
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cppi41dma: dma-controller@07402000 {
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compatible = "ti,am3359-cppi41";
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reg = <0x47400000 0x1000
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0x47402000 0x1000
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0x47403000 0x1000
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0x47404000 0x4000>;
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reg-names = "glue", "controller", "scheduler", "queuemgr";
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interrupts = <17>;
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interrupt-names = "glue";
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#dma-cells = <2>;
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#dma-channels = <30>;
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#dma-requests = <256>;
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};
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};
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