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Documentation / powerpc / dts-bindings / 4xx / ppc440spe-adma.txt


Based on kernel version 2.6.37. Page generated on 2011-03-22 21:57 EST.

1	PPC440SPe DMA/XOR (DMA Controller and XOR Accelerator)
2	
3	Device nodes needed for operation of the ppc440spe-adma driver
4	are specified hereby. These are I2O/DMA, DMA and XOR nodes
5	for DMA engines and Memory Queue Module node. The latter is used
6	by ADMA driver for configuration of RAID-6 H/W capabilities of
7	the PPC440SPe. In addition to the nodes and properties described
8	below, the ranges property of PLB node must specify ranges for
9	DMA devices.
10	
11	 i) The I2O node
12	
13	 Required properties:
14	
15	 - compatible		: "ibm,i2o-440spe";
16	 - reg			: <registers mapping>
17	 - dcr-reg		: <DCR registers range>
18	
19	 Example:
20	
21		I2O: i2o@400100000 {
22			compatible = "ibm,i2o-440spe";
23			reg = <0x00000004 0x00100000 0x100>;
24			dcr-reg = <0x060 0x020>;
25		};
26	
27	
28	 ii) The DMA node
29	
30	 Required properties:
31	
32	 - compatible		: "ibm,dma-440spe";
33	 - cell-index		: 1 cell, hardware index of the DMA engine
34				  (typically 0x0 and 0x1 for DMA0 and DMA1)
35	 - reg			: <registers mapping>
36	 - dcr-reg		: <DCR registers range>
37	 - interrupts		: <interrupt mapping for DMA0/1 interrupts sources:
38				   2 sources: DMAx CS FIFO Needs Service IRQ (on UIC0)
39				   and DMA Error IRQ (on UIC1). The latter is common
40				   for both DMA engines>.
41	 - interrupt-parent	: needed for interrupt mapping
42	
43	 Example:
44	
45		DMA0: dma0@400100100 {
46			compatible = "ibm,dma-440spe";
47			cell-index = <0>;
48			reg = <0x00000004 0x00100100 0x100>;
49			dcr-reg = <0x060 0x020>;
50			interrupt-parent = <&DMA0>;
51			interrupts = <0 1>;
52			#interrupt-cells = <1>;
53			#address-cells = <0>;
54			#size-cells = <0>;
55			interrupt-map = <
56				0 &UIC0 0x14 4
57				1 &UIC1 0x16 4>;
58		};
59	
60	
61	 iii) XOR Accelerator node
62	
63	 Required properties:
64	
65	 - compatible		: "amcc,xor-accelerator";
66	 - reg			: <registers mapping>
67	 - interrupts		: <interrupt mapping for XOR interrupt source>
68	 - interrupt-parent	: for interrupt mapping
69	
70	 Example:
71	
72		xor-accel@400200000 {
73			compatible = "amcc,xor-accelerator";
74			reg = <0x00000004 0x00200000 0x400>;
75			interrupt-parent = <&UIC1>;
76			interrupts = <0x1f 4>;
77		};
78	
79	
80	 iv) Memory Queue Module node
81	
82	 Required properties:
83	
84	 - compatible		: "ibm,mq-440spe";
85	 - dcr-reg		: <DCR registers range>
86	
87	 Example:
88	
89		MQ0: mq {
90			compatible = "ibm,mq-440spe";
91			dcr-reg = <0x040 0x020>;
92		};
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