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Documentation / devicetree / bindings / usb / am33xx-usb.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:02 EST.

1	  AM33xx MUSB
2	~~~~~~~~~~~~~~~
3	- compatible: ti,am33xx-usb
4	- reg: offset and length of the usbss register sets
5	- ti,hwmods : must be "usb_otg_hs"
6	
7	The glue layer contains multiple child nodes. It is required the have
8	at least a control module node, USB node and a PHY node. The second USB
9	node and its PHY node is optional. The DMA node is also optional.
10	
11	Reset module
12	~~~~~~~~~~~~
13	- compatible: ti,am335x-usb-ctrl-module
14	- reg: offset and length of the "USB control registers" in the "Control
15	  Module" block. A second offset and length for the USB wake up control
16	  in the same memory block.
17	- reg-names: "phy_ctrl" for the "USB control registers" and "wakeup" for
18	  the USB wake up control register.
19	
20	USB PHY
21	~~~~~~~
22	compatible: ti,am335x-usb-phy
23	reg: offset and length of the "USB PHY" register space
24	ti,ctrl_mod: reference to the "reset module" node
25	reg-names: phy
26	The PHY should have a "phy" alias numbered properly in the alias
27	node.
28	
29	USB
30	~~~
31	- compatible: ti,musb-am33xx
32	- reg: offset and length of "USB Controller Registers", and offset and
33	  length of "USB Core" register space.
34	- reg-names: control for the ""USB Controller Registers" and "mc" for
35	  "USB Core" register space
36	- interrupts: USB interrupt number
37	- interrupt-names: mc
38	- dr_mode: Should be one of "host", "peripheral" or "otg".
39	- mentor,multipoint: Should be "1" indicating the musb controller supports
40	  multipoint. This is a MUSB configuration-specific setting.
41	- mentor,num-eps: Specifies the number of endpoints. This is also a
42	  MUSB configuration-specific setting. Should be set to "16"
43	- mentor,ram-bits: Specifies the ram address size. Should be set to "12"
44	- mentor,power: Should be "500". This signifies the controller can supply up to
45	  500mA when operating in host mode.
46	- phys: reference to the USB phy
47	- dmas: specifies the dma channels
48	- dma-names: specifies the names of the channels. Use "rxN" for receive
49	  and "txN" for transmit endpoints. N specifies the endpoint number.
50	
51	The controller should have an "usb" alias numbered properly in the alias
52	node.
53	
54	DMA
55	~~~
56	- compatible: ti,am3359-cppi41
57	- reg: offset and length of the following register spaces: USBSS, USB
58	  CPPI DMA Controller, USB CPPI DMA Scheduler, USB Queue Manager
59	- reg-names: glue, controller, scheduler, queuemgr
60	- #dma-cells: should be set to 2. The first number represents the
61	  endpoint number (0 ⦠14 for endpoints 1 ⦠15 on instance 0 and 15 ⦠29
62	  for endpoints 1 ⦠15 on instance 1). The second number is 0 for RX and
63	  1 for TX transfers.
64	- #dma-channels: should be set to 30 representing the 15 endpoints for
65	  each USB instance.
66	
67	Example:
68	~~~~~~~~
69	The following example contains all the nodes as used on am335x-evm:
70	
71	aliases {
72		usb0 = &usb0;
73		usb1 = &usb1;
74		phy0 = &usb0_phy;
75		phy1 = &usb1_phy;
76	};
77	
78	usb: usb@47400000 {
79		compatible = "ti,am33xx-usb";
80		reg = <0x47400000 0x1000>;
81		ranges;
82		#address-cells = <1>;
83		#size-cells = <1>;
84		ti,hwmods = "usb_otg_hs";
85	
86		ctrl_mod: control@44e10000 {
87			compatible = "ti,am335x-usb-ctrl-module";
88			reg = <0x44e10620 0x10
89				0x44e10648 0x4>;
90			reg-names = "phy_ctrl", "wakeup";
91		};
92	
93		usb0_phy: usb-phy@47401300 {
94			compatible = "ti,am335x-usb-phy";
95			reg = <0x47401300 0x100>;
96			reg-names = "phy";
97			ti,ctrl_mod = <&ctrl_mod>;
98		};
99	
100		usb0: usb@47401000 {
101			compatible = "ti,musb-am33xx";
102			reg = <0x47401400 0x400
103				0x47401000 0x200>;
104			reg-names = "mc", "control";
105	
106			interrupts = <18>;
107			interrupt-names = "mc";
108			dr_mode = "otg"
109			mentor,multipoint = <1>;
110			mentor,num-eps = <16>;
111			mentor,ram-bits = <12>;
112			mentor,power = <500>;
113			phys = <&usb0_phy>;
114	
115			dmas = <&cppi41dma  0 0 &cppi41dma  1 0
116				&cppi41dma  2 0 &cppi41dma  3 0
117				&cppi41dma  4 0 &cppi41dma  5 0
118				&cppi41dma  6 0 &cppi41dma  7 0
119				&cppi41dma  8 0 &cppi41dma  9 0
120				&cppi41dma 10 0 &cppi41dma 11 0
121				&cppi41dma 12 0 &cppi41dma 13 0
122				&cppi41dma 14 0 &cppi41dma  0 1
123				&cppi41dma  1 1 &cppi41dma  2 1
124				&cppi41dma  3 1 &cppi41dma  4 1
125				&cppi41dma  5 1 &cppi41dma  6 1
126				&cppi41dma  7 1 &cppi41dma  8 1
127				&cppi41dma  9 1 &cppi41dma 10 1
128				&cppi41dma 11 1 &cppi41dma 12 1
129				&cppi41dma 13 1 &cppi41dma 14 1>;
130			dma-names =
131				"rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
132				"rx8", "rx9", "rx10", "rx11", "rx12", "rx13",
133				"rx14", "rx15",
134				"tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
135				"tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
136				"tx14", "tx15";
137		};
138	
139		usb1_phy: usb-phy@47401b00 {
140			compatible = "ti,am335x-usb-phy";
141			reg = <0x47401b00 0x100>;
142			reg-names = "phy";
143			ti,ctrl_mod = <&ctrl_mod>;
144		};
145	
146		usb1: usb@47401800 {
147			compatible = "ti,musb-am33xx";
148			reg = <0x47401c00 0x400
149				0x47401800 0x200>;
150			reg-names = "mc", "control";
151			interrupts = <19>;
152			interrupt-names = "mc";
153			dr_mode = "host"
154			mentor,multipoint = <1>;
155			mentor,num-eps = <16>;
156			mentor,ram-bits = <12>;
157			mentor,power = <500>;
158			phys = <&usb1_phy>;
159	
160			dmas = <&cppi41dma 15 0 &cppi41dma 16 0
161				&cppi41dma 17 0 &cppi41dma 18 0
162				&cppi41dma 19 0 &cppi41dma 20 0
163				&cppi41dma 21 0 &cppi41dma 22 0
164				&cppi41dma 23 0 &cppi41dma 24 0
165				&cppi41dma 25 0 &cppi41dma 26 0
166				&cppi41dma 27 0 &cppi41dma 28 0
167				&cppi41dma 29 0 &cppi41dma 15 1
168				&cppi41dma 16 1 &cppi41dma 17 1
169				&cppi41dma 18 1 &cppi41dma 19 1
170				&cppi41dma 20 1 &cppi41dma 21 1
171				&cppi41dma 22 1 &cppi41dma 23 1
172				&cppi41dma 24 1 &cppi41dma 25 1
173				&cppi41dma 26 1 &cppi41dma 27 1
174				&cppi41dma 28 1 &cppi41dma 29 1>;
175			dma-names =
176				"rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
177				"rx8", "rx9", "rx10", "rx11", "rx12", "rx13",
178				"rx14", "rx15",
179				"tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
180				"tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
181				"tx14", "tx15";
182		};
183	
184		cppi41dma: dma-controller@07402000 {
185			compatible = "ti,am3359-cppi41";
186			reg =  <0x47400000 0x1000
187				0x47402000 0x1000
188				0x47403000 0x1000
189				0x47404000 0x4000>;
190			reg-names = "glue", "controller", "scheduler", "queuemgr";
191			interrupts = <17>;
192			interrupt-names = "glue";
193			#dma-cells = <2>;
194			#dma-channels = <30>;
195			#dma-requests = <256>;
196		};
197	};
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