We bought several jetson tx1 modules in China.
Everything is good except the wifi 5.8G band.
The “iw list” command shows Band2 only support 8 channels, which caused most of the 5.8GHz in China can’t be scanned.
Also, the /lib/firmware/brcm/nvram.txt has ccode=“XR”
Our question is: how can we change the region code to have full 5.8GHz allowed in region China?
The iw list comment result
Wiphy phy0
max # scan SSIDs: 10
max scan IEs length: 2048 bytes
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports T-DLS.
Supported Ciphers:
* WEP40 (00-0f-ac:1)
* WEP104 (00-0f-ac:5)
* TKIP (00-0f-ac:2)
* CCMP (00-0f-ac:4)
* CMAC (00-0f-ac:6)
Available Antennas: TX 0 RX 0
Supported interface modes:
* IBSS
* managed
* AP
* P2P-client
* P2P-GO
* P2P-device
Band 1:
Capabilities: 0x1020
HT20
Static SM Power Save
RX HT20 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT RX MCS rate indexes supported: 0-7
HT TX MCS rate indexes are undefined
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
Band 2:
Capabilities: 0x1020
HT20
Static SM Power Save
RX HT20 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 16 usec (0x07)
HT RX MCS rate indexes supported: 0-7
HT TX MCS rate indexes are undefined
VHT Capabilities (0x0f815832):
Max MPDU length: 11454
Supported Channel Width: neither 160 nor 80+80
RX LDPC
short GI (80 MHz)
SU Beamformer
SU Beamformee
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
Bitrates (non-HT):
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 5180 MHz [36] (20.0 dBm)
* 5200 MHz [40] (20.0 dBm)
* 5220 MHz [44] (20.0 dBm)
* 5240 MHz [48] (20.0 dBm)
* 5260 MHz [52] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 4294831 sec)
* 5280 MHz [56] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 4294831 sec)
* 5300 MHz [60] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 4294831 sec)
* 5320 MHz [64] (20.0 dBm) (no IR, radar detection)
DFS state: usable (for 4294831 sec)
Part of nvram.txt
[b]
Sample variables file for BCM94354 WLBGA iPA, iLNA board with SDIO for production package
#NOTE: UPDATED TSSI PARAMETER FOR JETSON WITH COEX FILTER ON 10/5/2015. SHAILESH SINGH
NVRAMRev=$Rev: 373428 $
sromrev=11
boardrev=0x1101
boardtype=0x06db
boardflags=0x02400201
#enable LNA1 bypass for both 2G & 5G
#boardflags2=0xc0800000
boardflags2=0x00802000
boardflags3=0x4000000a
#boardnum=57410
macaddr=00:90:4c:16:70:01
ccode=XR
regrev=122
antswitch=0
pdgain5g=4
pdgain2g=4
tworangetssi2g=0
tworangetssi5g=0
paprdis=1
femctrl=10
vendid=0x14e4
devid=0x43a3
manfid=0x2d0
#prodid=0x052e
nocrc=1
otpimagesize=502
[/b]