Introduction

The Xilinx® LogiCORE™ IP JESD204 core implements a JESD2014B interface supporting line rates from 1Gbps to 12.5Gbps.
JESD204 can be configured as a transmitter or a reciever.

HW IP Features

Supports up to 8 lanes per core and up to 32 lanes using multiple cores
Supports Initial Lane Alignment
Supports scrambling
Supports 1–256 octets per frame
Supports 1–32 frames per multiframe
Supports Subclass 0, 1, and 2

Known Issues and Limitations

The driver is no longer maintained in the xilinx releases.

Kernel Configuration Options for Driver

To enable GPIO in the kernel, the following configuration options need to be enabled:

CONFIG_XILINX_JESD204B=y
CONFIG_XILINX_JESD204B_PHY=y

Devicetree

        jesd_Tx_axi_0: jesd_Tx@44a20000 {
            compatible = "xlnx,jesd204-5.1";
            reg = <0x44a20000 0x10000>;
                        xlnx,frames-per-multiframe = <30>;
                        xlnx,bytes-per-frame = <2>;
                        xlnx,subclass = <1>;
            xlnx,lanes = <0x2>;
            xlnx,node-is-transmit;
        } ;
        jesd_Rx_axi_0: jesd_Rx@44a00000 {
            compatible = "xlnx,jesd204-5.1";
            reg = <0x44a00000 0x10000>;
                        xlnx,frames-per-multiframe = <30>;
                        xlnx,bytes-per-frame = <2>;
                        xlnx,subclass = <1>;
            xlnx,lanes = <0x2>;
        } ;

Test procedure on Microblaze

# cat /sys/devices/axi@0/44a00000.jesd_Rx/lane0_info
DID: 0, BID: 0, LID: 0, L: 1, SCR: 0, F: 1
K: 1, M: 1, N: 1, CS: 0, S: 1, N': 1, HD: 0
FCHK: 0x0, CF: 0
ADJCNT: 0, PHYADJ: 0, ADJDIR: 0, JESDV: 0, SUBCLASS: 0
MFCNT : 0x0
ILACNT: 0x0
ERRCNT: 0x0
BUFCNT: 0x0
LECNT: 0x0
FC: 100000000
  #
 
/ # cat /sys/devices/platform/axi@0/44a00000.jesd_Rx/lane0_syncstat
NOT_IN_TAB: 0, DISPARITY: 2, UNEXPECTED_K: 0
/ #
/ # cat /sys/devices/platform/axi@0/44a00000.jesd_Rx/lane1_syncstat
NOT_IN_TAB: 0, DISPARITY: 0, UNEXPECTED_K: 0
/ #
/ # cat /sys/devices/platform/axi@0/44a00000.jesd_Rx/reg_access
0x1D
/ # cat /sys/devices/platform/axi@0/44a00000.jesd_Rx/sync_status
0x10001
/ #
 
 
 
**UIO:**
 
/ # cat /sys/class/uio/uio0/maps/map0/
/sys/class/uio/uio0/maps/map0/addr /sys/class/uio/uio0/maps/map0/offset
/sys/class/uio/uio0/maps/map0/name /sys/class/uio/uio0/maps/map0/size
 
/ # cat /sys/class/uio/uio0/maps/map0/*
0x40040000
/axi@0/Reset@40040000
0x0
0x00001000
/ #
 
 
 
Testing from sysfs:
 
/ # cat /sys/devices/platform/axi@0/44a00000.jesd_Rx/sync_status
0x10000
/ #
 
/ # devmem 0x40040000 32 1
/ # cat /sys/devices/platform/axi@0/44a00000.jesd_Rx/sync_status
0x10001
/ #
/ #

Expected Output

40400000.serial: ttyS0 at MMIO 0x40401000 (irq = 6, base_baud = 6250000) is a 16550A
console [ttyS0] enabled
brd: module loaded
xilinx_jesd204b 44a20000.jesd_Tx: AXI-JESD204B 6.0 Rev 1, at 0x44A20000mapped to 0xf00c0000,
xilinx_jesd204b 44a00000.jesd_Rx: AXI-JESD204B 6.0 Rev 1, at 0x44A00000mapped to 0xf00e0000,
i2c /dev entries driver
TCP: cubic registered
NET: Registered protocol family 17

The driver is deprecated.

Mainline Status

The driver is not mainlined.

Change Log

2023.2
- Deleted
2023.1
- None
2022.2
- None
2022.1
- None
2021.1
- None
2021.2
- None

2020.2
- Summary
  - misc: jesd204b: Remove unused function
- Commit
  - misc: jesd204b: Remove unused function

jesd204b

Note: The driver is deleted.