tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
29- xlnx,axis-tid-width: AXI-Stream TID width
30- xlnx,axis-tuser-width: AXI-Stream TUSER width
31- xlnx,data-interface-type: Should be <0x0>
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- xlnx,rx-fifo-pf-threshold: RX programmable full interrupt threshold
40- xlnx,s-axi-id-width: Should be <0x4>
41- xlnx,s-axi4-data-width: Should be <0x20>
42- xlnx,select-xpm: Should be <0x0>
43- xlnx,tx-fifo-depth: Depth of TX FIFO in words
44- xlnx,tx-fifo-pe-threshold: TX programmable empty interrupt threshold
45- xlnx,tx-fifo-pf-threshold: TX programmable full interrupt threshold
46- xlnx,use-rx-cut-through: Should be <0x0> (this feature isn't supported)
47- xlnx,use-rx-data: <0x1> if RX FIFO is enabled, <0x0> otherwise
48- xlnx,use-tx-ctrl: Should be <0x0> (this feature isn't supported)
49- xlnx,use-tx-cut-through: Should be <0x0> (this feature isn't supported)
50- xlnx,use-tx-data: <0x1> if TX FIFO is enabled, <0x0> otherwise
51
52Example:
53
54axi_fifo_mm_s_0: axi_fifo_mm_s@43c00000 {
55 compatible = "xlnx,axi-fifo-mm-s-4.1";
56 interrupt-names = "interrupt";
57 interrupt-parent = <&intc>;
58 interrupts = <0 29 4>;
59 reg = <0x43c00000 0x10000>;
60 xlnx,axi-str-rxd-protocol = "XIL_AXI_STREAM_ETH_DATA";
61 xlnx,axi-str-rxd-tdata-width = <0x20>;
62 xlnx,axi-str-txc-protocol = "XIL_AXI_STREAM_ETH_CTRL";
63 xlnx,axi-str-txc-tdata-width = <0x20>;
64 xlnx,axi-str-txd-protocol = "XIL_AXI_STREAM_ETH_DATA";
65 xlnx,axi-str-txd-tdata-width = <0x20>;
66 xlnx,axis-tdest-width = <0x4>;
67 xlnx,axis-tid-width = <0x4>;
68 xlnx,axis-tuser-width = <0x4>;
69 xlnx,data-interface-type = <0x0>;
70 xlnx,has-axis-tdest = <0x0>;
71 xlnx,has-axis-tid = <0x0>;
72 xlnx,has-axis-tkeep = <0x0>;
73 xlnx,has-axis-tstrb = <0x0>;
74 xlnx,has-axis-tuser = <0x0>;
75 xlnx,rx-fifo-depth = <0x200>;
76 xlnx,rx-fifo-pe-threshold = <0x2>;
77 xlnx,rx-fifo-pf-threshold = <0x1fb>;
78 xlnx,s-axi-id-width = <0x4>;
79 xlnx,s-axi4-data-width = <0x20>;
80 xlnx,select-xpm = <0x0>;
81 xlnx,tx-fifo-depth = <0x8000>;
82 xlnx,tx-fifo-pe-threshold = <0x200>;
83 xlnx,tx-fifo-pf-threshold = <0x7ffb>;
84 xlnx,use-rx-cut-through = <0x0>;
85 xlnx,use-rx-data = <0x0>;
86 xlnx,use-tx-ctrl = <0x0>;
87 xlnx,use-tx-cut-through = <0x0>;
88 xlnx,use-tx-data = <0x1>;
89};