| 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 the have |
| at least a control module node, USB node and a PHY node. The second USB |
| node and its PHY node is 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. |
| |
| 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>; |
| }; |
| |
| 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>; |
| }; |
| |
| 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@07402000 { |
| 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>; |
| }; |
| }; |
