Liu Gang | 91610d8 | 2011-11-12 20:02:32 +0800 | [diff] [blame] | 1 | Message unit node: |
| 2 | |
| 3 | For SRIO controllers that implement the message unit as part of the controller |
| 4 | this node is required. For devices with RMAN this node should NOT exist. The |
| 5 | node is composed of three types of sub-nodes ("fsl-srio-msg-unit", |
| 6 | "fsl-srio-dbell-unit" and "fsl-srio-port-write-unit"). |
| 7 | |
| 8 | See srio.txt for more details about generic SRIO controller details. |
| 9 | |
| 10 | - compatible |
| 11 | Usage: required |
| 12 | Value type: <string> |
| 13 | Definition: Must include "fsl,srio-rmu-vX.Y", "fsl,srio-rmu". |
| 14 | |
| 15 | The version X.Y should match the general SRIO controller's IP Block |
| 16 | revision register's Major(X) and Minor (Y) value. |
| 17 | |
| 18 | - reg |
| 19 | Usage: required |
| 20 | Value type: <prop-encoded-array> |
| 21 | Definition: A standard property. Specifies the physical address and |
| 22 | length of the SRIO configuration registers for message units |
| 23 | and doorbell units. |
| 24 | |
| 25 | - fsl,liodn |
| 26 | Usage: optional-but-recommended (for devices with PAMU) |
| 27 | Value type: <prop-encoded-array> |
| 28 | Definition: The logical I/O device number for the PAMU (IOMMU) to be |
| 29 | correctly configured for SRIO accesses. The property should |
| 30 | not exist on devices that do not support PAMU. |
| 31 | |
| 32 | The LIODN value is associated with all RMU transactions |
| 33 | (msg-unit, doorbell, port-write). |
| 34 | |
| 35 | Sub-Nodes for RMU: The RMU node is composed of multiple sub-nodes that |
| 36 | correspond to the actual sub-controllers in the RMU. The manual for a given |
| 37 | SoC will detail which and how many of these sub-controllers are implemented. |
| 38 | |
| 39 | Message Unit: |
| 40 | |
| 41 | - compatible |
| 42 | Usage: required |
| 43 | Value type: <string> |
| 44 | Definition: Must include "fsl,srio-msg-unit-vX.Y", "fsl,srio-msg-unit". |
| 45 | |
| 46 | The version X.Y should match the general SRIO controller's IP Block |
| 47 | revision register's Major(X) and Minor (Y) value. |
| 48 | |
| 49 | - reg |
| 50 | Usage: required |
| 51 | Value type: <prop-encoded-array> |
| 52 | Definition: A standard property. Specifies the physical address and |
| 53 | length of the SRIO configuration registers for message units |
| 54 | and doorbell units. |
| 55 | |
| 56 | - interrupts |
| 57 | Usage: required |
| 58 | Value type: <prop_encoded-array> |
| 59 | Definition: Specifies the interrupts generated by this device. The |
| 60 | value of the interrupts property consists of one interrupt |
| 61 | specifier. The format of the specifier is defined by the |
| 62 | binding document describing the node's interrupt parent. |
| 63 | |
| 64 | A pair of IRQs are specified in this property. The first |
| 65 | element is associated with the transmit (TX) interrupt and the |
| 66 | second element is associated with the receive (RX) interrupt. |
| 67 | |
| 68 | Doorbell Unit: |
| 69 | |
| 70 | - compatible |
| 71 | Usage: required |
| 72 | Value type: <string> |
| 73 | Definition: Must include: |
| 74 | "fsl,srio-dbell-unit-vX.Y", "fsl,srio-dbell-unit" |
| 75 | |
| 76 | The version X.Y should match the general SRIO controller's IP Block |
| 77 | revision register's Major(X) and Minor (Y) value. |
| 78 | |
| 79 | - reg |
| 80 | Usage: required |
| 81 | Value type: <prop-encoded-array> |
| 82 | Definition: A standard property. Specifies the physical address and |
| 83 | length of the SRIO configuration registers for message units |
| 84 | and doorbell units. |
| 85 | |
| 86 | - interrupts |
| 87 | Usage: required |
| 88 | Value type: <prop_encoded-array> |
| 89 | Definition: Specifies the interrupts generated by this device. The |
| 90 | value of the interrupts property consists of one interrupt |
| 91 | specifier. The format of the specifier is defined by the |
| 92 | binding document describing the node's interrupt parent. |
| 93 | |
| 94 | A pair of IRQs are specified in this property. The first |
| 95 | element is associated with the transmit (TX) interrupt and the |
| 96 | second element is associated with the receive (RX) interrupt. |
| 97 | |
| 98 | Port-Write Unit: |
| 99 | |
| 100 | - compatible |
| 101 | Usage: required |
| 102 | Value type: <string> |
| 103 | Definition: Must include: |
| 104 | "fsl,srio-port-write-unit-vX.Y", "fsl,srio-port-write-unit" |
| 105 | |
| 106 | The version X.Y should match the general SRIO controller's IP Block |
| 107 | revision register's Major(X) and Minor (Y) value. |
| 108 | |
| 109 | - reg |
| 110 | Usage: required |
| 111 | Value type: <prop-encoded-array> |
| 112 | Definition: A standard property. Specifies the physical address and |
| 113 | length of the SRIO configuration registers for message units |
| 114 | and doorbell units. |
| 115 | |
| 116 | - interrupts |
| 117 | Usage: required |
| 118 | Value type: <prop_encoded-array> |
| 119 | Definition: Specifies the interrupts generated by this device. The |
| 120 | value of the interrupts property consists of one interrupt |
| 121 | specifier. The format of the specifier is defined by the |
| 122 | binding document describing the node's interrupt parent. |
| 123 | |
| 124 | A single IRQ that handles port-write conditions is |
| 125 | specified by this property. (Typically shared with error). |
| 126 | |
| 127 | Note: All other standard properties (see the ePAPR) are allowed |
| 128 | but are optional. |
| 129 | |
| 130 | Example: |
| 131 | rmu: rmu@d3000 { |
| 132 | compatible = "fsl,srio-rmu"; |
| 133 | reg = <0xd3000 0x400>; |
| 134 | ranges = <0x0 0xd3000 0x400>; |
| 135 | fsl,liodn = <0xc8>; |
| 136 | |
| 137 | message-unit@0 { |
| 138 | compatible = "fsl,srio-msg-unit"; |
| 139 | reg = <0x0 0x100>; |
| 140 | interrupts = < |
| 141 | 60 2 0 0 /* msg1_tx_irq */ |
| 142 | 61 2 0 0>;/* msg1_rx_irq */ |
| 143 | }; |
| 144 | message-unit@100 { |
| 145 | compatible = "fsl,srio-msg-unit"; |
| 146 | reg = <0x100 0x100>; |
| 147 | interrupts = < |
| 148 | 62 2 0 0 /* msg2_tx_irq */ |
| 149 | 63 2 0 0>;/* msg2_rx_irq */ |
| 150 | }; |
| 151 | doorbell-unit@400 { |
| 152 | compatible = "fsl,srio-dbell-unit"; |
| 153 | reg = <0x400 0x80>; |
| 154 | interrupts = < |
| 155 | 56 2 0 0 /* bell_outb_irq */ |
| 156 | 57 2 0 0>;/* bell_inb_irq */ |
| 157 | }; |
| 158 | port-write-unit@4e0 { |
| 159 | compatible = "fsl,srio-port-write-unit"; |
| 160 | reg = <0x4e0 0x20>; |
| 161 | interrupts = <16 2 1 11>; |
| 162 | }; |
| 163 | }; |