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Atmel SOC USB controllers
OHCI
Required properties:
- compatible: Should be "atmel,at91rm9200-ohci" for USB controllers
used in host mode.
- reg: Address and length of the register set for the device
- interrupts: Should contain ehci interrupt
- clocks: Should reference the peripheral, host and system clocks
- clock-names: Should contains two strings
"ohci_clk" for the peripheral clock
"hclk" for the host clock
"uhpck" for the system clock
- num-ports: Number of ports.
- atmel,vbus-gpio: If present, specifies a gpio that needs to be
activated for the bus to be powered.
- atmel,oc-gpio: If present, specifies a gpio that needs to be
activated for the overcurrent detection.
usb0: ohci@00500000 {
compatible = "atmel,at91rm9200-ohci", "usb-ohci";
reg = <0x00500000 0x100000>;
clocks = <&uhphs_clk>, <&uhphs_clk>, <&uhpck>;
clock-names = "ohci_clk", "hclk", "uhpck";
interrupts = <20 4>;
num-ports = <2>;
};
EHCI
Required properties:
- compatible: Should be "atmel,at91sam9g45-ehci" for USB controllers
used in host mode.
- reg: Address and length of the register set for the device
- interrupts: Should contain ehci interrupt
- clocks: Should reference the peripheral and the UTMI clocks
- clock-names: Should contains two strings
"ehci_clk" for the peripheral clock
"usb_clk" for the UTMI clock
usb1: ehci@00800000 {
compatible = "atmel,at91sam9g45-ehci", "usb-ehci";
reg = <0x00800000 0x100000>;
interrupts = <22 4>;
clocks = <&utmi>, <&uhphs_clk>;
clock-names = "usb_clk", "ehci_clk";
};
AT91 USB device controller
Required properties:
- compatible: Should be one of the following
"atmel,at91rm9200-udc"
"atmel,at91sam9260-udc"
"atmel,at91sam9261-udc"
"atmel,at91sam9263-udc"
- reg: Address and length of the register set for the device
- interrupts: Should contain macb interrupt
- clocks: Should reference the peripheral and the AHB clocks
- clock-names: Should contains two strings
"pclk" for the peripheral clock
"hclk" for the AHB clock
Optional properties:
- atmel,vbus-gpio: If present, specifies a gpio that needs to be
activated for the bus to be powered.
usb1: gadget@fffa4000 {
compatible = "atmel,at91rm9200-udc";
reg = <0xfffa4000 0x4000>;
interrupts = <10 4>;
clocks = <&udc_clk>, <&udpck>;
clock-names = "pclk", "hclk";
atmel,vbus-gpio = <&pioC 5 0>;
};
Atmel High-Speed USB device controller
Required properties:
- compatible: Should be one of the following
"at91sam9rl-udc"
"at91sam9g45-udc"
"sama5d3-udc"
- reg: Address and length of the register set for the device
- interrupts: Should contain usba interrupt
- clocks: Should reference the peripheral and host clocks
- clock-names: Should contains two strings
"pclk" for the peripheral clock
"hclk" for the host clock
- ep childnode: To specify the number of endpoints and their properties.
Optional properties:
- atmel,vbus-gpio: If present, specifies a gpio that allows to detect whether
vbus is present (USB is connected).
Required child node properties:
- name: Name of the endpoint.
- reg: Num of the endpoint.
- atmel,fifo-size: Size of the fifo.
- atmel,nb-banks: Number of banks.
- atmel,can-dma: Boolean to specify if the endpoint support DMA.
- atmel,can-isoc: Boolean to specify if the endpoint support ISOC.
usb2: gadget@fff78000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "atmel,at91sam9rl-udc";
reg = <0x00600000 0x80000
0xfff78000 0x400>;
interrupts = <27 4 0>;
clocks = <&utmi>, <&udphs_clk>;
clock-names = "hclk", "pclk";
atmel,vbus-gpio = <&pioB 19 0>;
ep0 {
reg = <0>;
atmel,fifo-size = <64>;
atmel,nb-banks = <1>;
};
ep1 {
reg = <1>;
atmel,fifo-size = <1024>;
atmel,nb-banks = <2>;
atmel,can-dma;
atmel,can-isoc;
};
ep2 {
reg = <2>;
atmel,fifo-size = <1024>;
atmel,nb-banks = <2>;
atmel,can-dma;
atmel,can-isoc;
};
ep3 {
reg = <3>;
atmel,fifo-size = <1024>;
atmel,nb-banks = <3>;
atmel,can-dma;
};
ep4 {
reg = <4>;
atmel,fifo-size = <1024>;
atmel,nb-banks = <3>;
atmel,can-dma;
};
ep5 {
reg = <5>;
atmel,fifo-size = <1024>;
atmel,nb-banks = <3>;
atmel,can-dma;
atmel,can-isoc;
};
ep6 {
reg = <6>;
atmel,fifo-size = <1024>;
atmel,nb-banks = <3>;
atmel,can-dma;
atmel,can-isoc;
};
};
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