To find the WWN run the cat /proc/scsi/adapter_type/n command, where adapter_type is the host adapter type, and n is the host adapter number for your card. In most cases, the adapter type is qla2xxx.

cat /proc/scsi/adapter_type/<n>

The adapter WWN information can be found:

cat /sys/class/fc_host/host<n>/port_name

cat /sys/class/fc_host/host5/port_name
0x5001438002a30302

cat /sys/class/fc_host/host*/port_state

lspci | grep -i fibre
08:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
08:00.1 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)

  
cat /sys/class/scsi_host/host<n>/model_name
QMH2462

cat /sys/class/scsi_host/host<n>/fw_version

cat /sys/class/scsi_host/host[4-5]/fw_version
5.06.02 (90d5)
5.06.02 (90d5)

Alternatively:

dmesg | grep fw

Exaample output:

qla2xxx 0000:08:00.0: firmware: requesting ql2500_fw.bin
ISP2532: PCIe (2.5GT/s x8) @ 0000:08:00.0 hdma+, host#=4, fw=5.06.02 (90d5)
ISP2532: PCIe (2.5GT/s x8) @ 0000:08:00.1 hdma+, host#=5, fw=5.06.02 (90d5)