MYD-YA157C系列定製板AP6234無線網絡卡適配筆記
阿新 • • 發佈：2021-08-13
MYD-YA157C系列定製板AP6234無線網絡卡適配筆記 2021.8.13
MYD-YA157C定製板標配採用了AP6212(BCM43430A0)wifi&Bluetooth二合一模組，且官方已對其做好了驅動適配，該網絡卡驅動需要與韌體配合使用。
此次我們定製的開發板使用了AP6234（BCM43340B0），支援5G頻段，原版系統映象中已包含AP6212的驅動，但沒有針對AP6234做適配，執行ifconfig，裡面並沒有出現wlan0等介面。
root@myir:~# ifconfig eth0 Link encap:Ethernet HWaddr D2:9C:38:63:E6:C1 inet addr:192.168.10.2 Bcast:192.168.10.255 Mask:255.255.255.0 inet6 addr: fe80::d09c:38ff:fe63:e6c1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5939 errors:0 dropped:1 overruns:0 frame:0 TX packets:5772 errors:0 dropped:0overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:501741 (489.9 KiB) TX bytes:2401061 (2.2 MiB) Interrupt:51 Base address:0x8000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:376 errors:0 dropped:0 overruns:0 frame:0 TX packets:376 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:23344 (22.7 KiB) TX bytes:23344 (22.7 KiB) usb0 Link encap:Ethernet HWaddr B6:1F:9D:BB:2B:CE inet addr:192.168.7.2 Bcast:192.168.7.255 Mask:255.255.255.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
接下來我們執行dmesg | grep brcmfmac
root@myir:~# dmesg | grep brcmfmac [ 14.757669] brcmfmac: F1 signature read @0x18000000=0x1602a94c [ 14.806110] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43340-sdio for chip BCM43340/2 [ 14.836721] brcmfmac mmc0:0001:1: Direct firmware load for brcm/brcmfmac43340-sdio.bin failed with error -2 [ 15.887412] brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50
發現這裡有一條錯誤：Direct firmware load for brcm/brcmfmac43340-sdio.bin failed with error -2
由於米爾官方已經對另一個相似的wifi模組AP6212進行適配，所以這裡我們直接更換韌體進行試驗。
從GitHub下載brcmfmac43340-sdio.bin放到/lib/firmware/brcm目錄下 （韌體連結放在文章最後），並在此目錄下新建一個txt檔案，命名為brcmfmac43340-sdio.myir,stm32mp157c-ya157c-v2.txt，並把以下內容複製到該文字檔案中，注意nvram裡面的xtalfreq改為xtalfreq=26000並儲存。
#AP6234_NVRAM_V1.1_20131225 manfid=0x2d0 prodid=0x0653 vendid=0x14e4 devid=0x4386 boardtype=0x0653 boardrev=0x1203 boardnum=22 macaddr=00:90:4c:c5:12:38 sromrev=3 #boardflags: # bit 19 3tswitch: 2.4GHz FEM: SP3T switch share with BT # bit 16 nopa: no external pa # keep original 0x200 boardflags=0x0090201 xtalfreq=37400 /*模組使用26M晶振，此處應改為26000*/ nocrc=1 ag0=255 aa2g=1 ccode=ALL pa0itssit=0x20 #PA parameters for 2.4GHz pa0b0=6957 default #pa0b0=6727 pa0b1=-808 pa0b2=-178 tssifloor2g=69 # rssi params for 2.4GHz rssismf2g=0xf rssismc2g=0x8 rssisav2g=0x1 cckPwrOffset=3 # rssi params for 5GHz rssismf5g=0xf rssismc5g=0x7 #rssisav5g=0x1 rssisav5g=0x3 #PA parameters for lower a-band #pa1lob0=5659 default pa1lob0=5859 #pa1lob0=5659 pa1lob1=-693 pa1lob2=-178 tssifloor5gl=77 #PA parameters for midband pa1b0=5372 #pa1b0=5172 pa1b1=-671 pa1b2=-212 tssifloor5gm=77 #PA paramasdeters for high band #pa1hib0=5320 default pa1hib0=5620 #pa1hib1=-963 pa1hib1=-663 pa1hib2=-179 tssifloor5gh=74 rxpo5g=0 maxp2ga0=76 # 19.5dBm max; 18dBm target #Per rate power back-offs for g band, in .5 dB steps. Set it once you have the right numbers. cck2gpo=0x2222 ofdm2gpo=0x333333333 # R54 16dBm; R48 17dBm; others 18dBm mcs2gpo0=0x5555 # M0~ M4 17dBm mcs2gpo1=0x5555 # M5M6 15dBm; M7 14.5dBm #max power for 5G maxp5ga0=68 # 16dBm target; 17.5dBm Max maxp5gla0=68 maxp5gha0=68 #Per rate power back-offs for a band, in .5 dB steps. Set it once you have the right numbers. ofdm5gpo=0x66666666 # R54 13.5dBm ofdm5glpo=0x66666666 ofdm5ghpo=0x66666666 mcs5gpo0=0x8888 # M0~M4 16dBm (1dB higher than ofdm) mcs5gpo1=0x8888 # M5M6 13.5dBm; M7 12dBm mcs5glpo0=0x7777 mcs5glpo1=0x7777 mcs5ghpo0=0x7777 mcs5ghpo1=0x7777 # Parameters for DAC2x mode and ALPF bypass # RF SW Truth Table: ctrl0 for BT_TX; ctrl1 or 5G Tx; ctrl2 for 5G Rx; Ctrl3 for 2G Tx; Ctrl4 for 2G Rx swctrlmap_2g=0x00080008,0x00100010,0x00080008,0x011010,0x11f swctrlmap_5g=0x00040004,0x00020002,0x00040004,0x011010,0x2fe gain=32 triso2g=8 triso5g=8 #tx parameters loflag=0 iqlocalidx5g=40 dlocalidx5g=70 iqcalidx5g=50 lpbckmode5g=1 txiqlopapu5g=0 txiqlopapu2g=0 dlorange_lowlimit=5 txalpfbyp=1 txalpfpu=1 dacrate2xen=1 papden2g=1 papden5g=1 #rx parameters gain_settle_dly_2g=4 gain_settle_dly_5g=4 noise_cal_po_2g=-1 noise_cal_po_40_2g=-1 noise_cal_high_gain_2g=73 noise_cal_nf_substract_val_2g=346 noise_cal_po_5g=-1 noise_cal_po_40_5g=-1 noise_cal_high_gain_5g=73 noise_cal_nf_substract_val_5g=346 cckpapden=0 # Enable OOB interrupt: level trigger muxenab=0x10
儲存後，重啟定製板。
root@myir:~# reboot
重啟後，使用dmesg命令檢視關於該模組的日誌。
dmesg | grep brcmfmac
執行ifconfig，發現列表中沒有wlan相關介面。
繼續執行ifconfig -a
這次發現列表中已經有wlan0，但並沒有被啟用。
輸入以下命令啟用wlan0
ifconfig wlan0 up
再次執行ifconfig，wlan0已出現在列表中。
輸入以下命令掃描周圍WiFi
iw dev wlan0 scan | grep SSID
2.4G和5G訊號均能搜尋到，無線網絡卡已成功適配。