1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2# Copyright (C) 2020 Texas Instruments Incorporated 3# Author: Peter Ujfalusi <peter.ujfalusi@ti.com> 4%YAML 1.2 5--- 6$id: http://devicetree.org/schemas/dma/ti/k3-pktdma.yaml# 7$schema: http://devicetree.org/meta-schemas/core.yaml# 8 9title: Texas Instruments K3 DMSS PKTDMA Device Tree Bindings 10 11maintainers: 12 - Peter Ujfalusi <peter.ujfalusi@gmail.com> 13 14description: | 15 The Packet DMA (PKTDMA) is intended to perform similar functions as the packet 16 mode channels of K3 UDMA-P. 17 PKTDMA only includes Split channels to service PSI-L based peripherals. 18 19 The peripherals can be PSI-L native or legacy, non PSI-L native peripherals 20 with PDMAs. PDMA is tasked to act as a bridge between the PSI-L fabric and the 21 legacy peripheral. 22 23 PDMAs can be configured via PKTDMA split channel's peer registers to match 24 with the configuration of the legacy peripheral. 25 26allOf: 27 - $ref: /schemas/dma/dma-controller.yaml# 28 - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml# 29 30properties: 31 compatible: 32 const: ti,am64-dmss-pktdma 33 34 "#dma-cells": 35 const: 2 36 description: | 37 The first cell is the PSI-L thread ID of the remote (to PKTDMA) end. 38 Valid ranges for thread ID depends on the data movement direction: 39 for source thread IDs (rx): 0 - 0x7fff 40 for destination thread IDs (tx): 0x8000 - 0xffff 41 42 Please refer to the device documentation for the PSI-L thread map and also 43 the PSI-L peripheral chapter for the correct thread ID. 44 45 The second cell is the ASEL value for the channel 46 47 reg: 48 maxItems: 4 49 50 reg-names: 51 items: 52 - const: gcfg 53 - const: rchanrt 54 - const: tchanrt 55 - const: ringrt 56 57 msi-parent: true 58 59 ti,sci-rm-range-tchan: 60 $ref: /schemas/types.yaml#/definitions/uint32-array 61 description: | 62 Array of PKTDMA split tx channel resource subtypes for resource allocation 63 for this host 64 minItems: 1 65 # Should be enough 66 maxItems: 255 67 items: 68 maximum: 0x3f 69 70 ti,sci-rm-range-tflow: 71 $ref: /schemas/types.yaml#/definitions/uint32-array 72 description: | 73 Array of PKTDMA split tx flow resource subtypes for resource allocation 74 for this host 75 minItems: 1 76 # Should be enough 77 maxItems: 255 78 items: 79 maximum: 0x3f 80 81 ti,sci-rm-range-rchan: 82 $ref: /schemas/types.yaml#/definitions/uint32-array 83 description: | 84 Array of PKTDMA split rx channel resource subtypes for resource allocation 85 for this host 86 minItems: 1 87 # Should be enough 88 maxItems: 255 89 items: 90 maximum: 0x3f 91 92 ti,sci-rm-range-rflow: 93 $ref: /schemas/types.yaml#/definitions/uint32-array 94 description: | 95 Array of PKTDMA split rx flow resource subtypes for resource allocation 96 for this host 97 minItems: 1 98 # Should be enough 99 maxItems: 255 100 items: 101 maximum: 0x3f 102 103required: 104 - compatible 105 - "#dma-cells" 106 - reg 107 - reg-names 108 - msi-parent 109 - ti,sci 110 - ti,sci-dev-id 111 - ti,sci-rm-range-tchan 112 - ti,sci-rm-range-tflow 113 - ti,sci-rm-range-rchan 114 - ti,sci-rm-range-rflow 115 116unevaluatedProperties: false 117 118examples: 119 - |+ 120 cbass_main { 121 #address-cells = <2>; 122 #size-cells = <2>; 123 124 main_dmss { 125 compatible = "simple-mfd"; 126 #address-cells = <2>; 127 #size-cells = <2>; 128 dma-ranges; 129 ranges; 130 131 ti,sci-dev-id = <25>; 132 133 main_pktdma: dma-controller@485c0000 { 134 compatible = "ti,am64-dmss-pktdma"; 135 136 reg = <0x0 0x485c0000 0x0 0x100>, 137 <0x0 0x4a800000 0x0 0x20000>, 138 <0x0 0x4aa00000 0x0 0x40000>, 139 <0x0 0x4b800000 0x0 0x400000>; 140 reg-names = "gcfg", "rchanrt", "tchanrt", "ringrt"; 141 msi-parent = <&inta_main_dmss>; 142 #dma-cells = <2>; 143 144 ti,sci = <&dmsc>; 145 ti,sci-dev-id = <30>; 146 147 ti,sci-rm-range-tchan = <0x23>, /* UNMAPPED_TX_CHAN */ 148 <0x24>, /* CPSW_TX_CHAN */ 149 <0x25>, /* SAUL_TX_0_CHAN */ 150 <0x26>, /* SAUL_TX_1_CHAN */ 151 <0x27>, /* ICSSG_0_TX_CHAN */ 152 <0x28>; /* ICSSG_1_TX_CHAN */ 153 ti,sci-rm-range-tflow = <0x10>, /* RING_UNMAPPED_TX_CHAN */ 154 <0x11>, /* RING_CPSW_TX_CHAN */ 155 <0x12>, /* RING_SAUL_TX_0_CHAN */ 156 <0x13>, /* RING_SAUL_TX_1_CHAN */ 157 <0x14>, /* RING_ICSSG_0_TX_CHAN */ 158 <0x15>; /* RING_ICSSG_1_TX_CHAN */ 159 ti,sci-rm-range-rchan = <0x29>, /* UNMAPPED_RX_CHAN */ 160 <0x2b>, /* CPSW_RX_CHAN */ 161 <0x2d>, /* SAUL_RX_0_CHAN */ 162 <0x2f>, /* SAUL_RX_1_CHAN */ 163 <0x31>, /* SAUL_RX_2_CHAN */ 164 <0x33>, /* SAUL_RX_3_CHAN */ 165 <0x35>, /* ICSSG_0_RX_CHAN */ 166 <0x37>; /* ICSSG_1_RX_CHAN */ 167 ti,sci-rm-range-rflow = <0x2a>, /* FLOW_UNMAPPED_RX_CHAN */ 168 <0x2c>, /* FLOW_CPSW_RX_CHAN */ 169 <0x2e>, /* FLOW_SAUL_RX_0/1_CHAN */ 170 <0x32>, /* FLOW_SAUL_RX_2/3_CHAN */ 171 <0x36>, /* FLOW_ICSSG_0_RX_CHAN */ 172 <0x38>; /* FLOW_ICSSG_1_RX_CHAN */ 173 }; 174 }; 175 }; 176