axis-fifo.txt (3982B)
1Xilinx AXI-Stream FIFO v4.1 IP core 2 3This IP core has read and write AXI-Stream FIFOs, the contents of which can 4be accessed from the AXI4 memory-mapped interface. This is useful for 5transferring data from a processor into the FPGA fabric. The driver creates 6a character device that can be read/written to with standard 7open/read/write/close. 8 9See Xilinx PG080 document for IP details. 10 11Currently supports only store-forward mode with a 32-bit 12AXI4-Lite interface. DOES NOT support: 13 - cut-through mode 14 - AXI4 (non-lite) 15 16Required properties: 17- compatible: Should be "xlnx,axi-fifo-mm-s-4.1" 18- interrupt-names: Should be "interrupt" 19- interrupt-parent: Should be <&intc> 20- interrupts: Should contain interrupts lines. 21- reg: Should contain registers location and length. 22- xlnx,axi-str-rxd-protocol: Should be "XIL_AXI_STREAM_ETH_DATA" 23- xlnx,axi-str-rxd-tdata-width: Should be <0x20> 24- xlnx,axi-str-txc-protocol: Should be "XIL_AXI_STREAM_ETH_CTRL" 25- xlnx,axi-str-txc-tdata-width: Should be <0x20> 26- xlnx,axi-str-txd-protocol: Should be "XIL_AXI_STREAM_ETH_DATA" 27- xlnx,axi-str-txd-tdata-width: Should be <0x20> 28- xlnx,axis-tdest-width: AXI-Stream TDEST width (ignored by the driver) 29- xlnx,axis-tid-width: AXI-Stream TID width (ignored by the driver) 30- xlnx,axis-tuser-width: AXI-Stream TUSER width (ignored by the driver) 31- xlnx,data-interface-type: Should be <0x0> (ignored by the driver) 32- xlnx,has-axis-tdest: Should be <0x0> (this feature isn't supported) 33- xlnx,has-axis-tid: Should be <0x0> (this feature isn't supported) 34- xlnx,has-axis-tkeep: Should be <0x0> (this feature isn't supported) 35- xlnx,has-axis-tstrb: Should be <0x0> (this feature isn't supported) 36- xlnx,has-axis-tuser: Should be <0x0> (this feature isn't supported) 37- xlnx,rx-fifo-depth: Depth of RX FIFO in words 38- xlnx,rx-fifo-pe-threshold: RX programmable empty interrupt threshold 39 (ignored by the driver) 40- xlnx,rx-fifo-pf-threshold: RX programmable full interrupt threshold 41 (ignored by the driver) 42- xlnx,s-axi-id-width: Should be <0x4> (ignored by the driver) 43- xlnx,s-axi4-data-width: Should be <0x20> (ignored by the driver) 44- xlnx,select-xpm: Should be <0x0> (ignored by the driver) 45- xlnx,tx-fifo-depth: Depth of TX FIFO in words 46- xlnx,tx-fifo-pe-threshold: TX programmable empty interrupt threshold 47 (ignored by the driver) 48- xlnx,tx-fifo-pf-threshold: TX programmable full interrupt threshold 49 (ignored by the driver) 50- xlnx,use-rx-cut-through: Should be <0x0> (this feature isn't supported) 51- xlnx,use-rx-data: <0x1> if RX FIFO is enabled, <0x0> otherwise 52- xlnx,use-tx-ctrl: Should be <0x0> (this feature isn't supported) 53- xlnx,use-tx-cut-through: Should be <0x0> (this feature isn't supported) 54- xlnx,use-tx-data: <0x1> if TX FIFO is enabled, <0x0> otherwise 55 56Example: 57 58axi_fifo_mm_s_0: axi_fifo_mm_s@43c00000 { 59 compatible = "xlnx,axi-fifo-mm-s-4.1"; 60 interrupt-names = "interrupt"; 61 interrupt-parent = <&intc>; 62 interrupts = <0 29 4>; 63 reg = <0x43c00000 0x10000>; 64 xlnx,axi-str-rxd-protocol = "XIL_AXI_STREAM_ETH_DATA"; 65 xlnx,axi-str-rxd-tdata-width = <0x20>; 66 xlnx,axi-str-txc-protocol = "XIL_AXI_STREAM_ETH_CTRL"; 67 xlnx,axi-str-txc-tdata-width = <0x20>; 68 xlnx,axi-str-txd-protocol = "XIL_AXI_STREAM_ETH_DATA"; 69 xlnx,axi-str-txd-tdata-width = <0x20>; 70 xlnx,axis-tdest-width = <0x4>; 71 xlnx,axis-tid-width = <0x4>; 72 xlnx,axis-tuser-width = <0x4>; 73 xlnx,data-interface-type = <0x0>; 74 xlnx,has-axis-tdest = <0x0>; 75 xlnx,has-axis-tid = <0x0>; 76 xlnx,has-axis-tkeep = <0x0>; 77 xlnx,has-axis-tstrb = <0x0>; 78 xlnx,has-axis-tuser = <0x0>; 79 xlnx,rx-fifo-depth = <0x200>; 80 xlnx,rx-fifo-pe-threshold = <0x2>; 81 xlnx,rx-fifo-pf-threshold = <0x1fb>; 82 xlnx,s-axi-id-width = <0x4>; 83 xlnx,s-axi4-data-width = <0x20>; 84 xlnx,select-xpm = <0x0>; 85 xlnx,tx-fifo-depth = <0x8000>; 86 xlnx,tx-fifo-pe-threshold = <0x200>; 87 xlnx,tx-fifo-pf-threshold = <0x7ffb>; 88 xlnx,use-rx-cut-through = <0x0>; 89 xlnx,use-rx-data = <0x0>; 90 xlnx,use-tx-ctrl = <0x0>; 91 xlnx,use-tx-cut-through = <0x0>; 92 xlnx,use-tx-data = <0x1>; 93};