Wi-Fi® + Bluetooth® + 802.15.4のトピックRe: Problem with 8997 PCIEUART

Problem with 8997 PCIEUART

robot1 — Wed, 19 Mar 2025 11:47:30 GMT

Dear NXP

We need to change WIFI module on a selling product because of EOL on old modules.

We are going from:

- A 8897 PCIE+USB(pcie8897_uapsta.bin); to

- A 8997 PCIE+UART(pcieuart8997_combo_v4.bin)

The new module we are evaluatiing is:

https://www.advantech.com/en/products/1-2r51yz/aiw-154/mod_39a01ad5-48ec-4fb0-953b-54387a97cbfc

I am running:

- Linux 4.9.85-something ... armv7l GNU/Linux - FSL clone

- Hardware : Freescale i.MX6 Quad/DualLite (Device Tree)

I simply cannot make bluetooth run on the new modules:

I am using the mwifiex_pcie.ko and when modprobing this module I get following log:

modprobe -v mwifiex_pcie insmod /lib/modules/4.9.85-g9aee8b6-dirty/kernel/drivers/net/wireless/marvell/mwifiex/mwifiex.ko insmod /lib/modules/4.9.85-g9aee8b6-dirty/kernel/drivers/net/wireless/marvell/mwifiex/mwifiex_pcie.ko Mar 19 10:29:20; info; kernel:[ 93.789603] mwifiex_pcie 0000:01:00.0: enabling device (0140 -> 0142) Mar 19 10:29:20; notice; kernel:[ 93.789656] mwifiex_pcie: try set_consistent_dma_mask(32) Mar 19 10:29:20; notice; kernel:[ 93.789729] mwifiex_pcie: PCI memory map Virt0: e1100000 PCI memory map Virt2: e1300000 Mar 19 10:29:20; info; kernel:[ 93.796715] [mwifiex_pcie_get_fw_name]:2934 - card->dev->device:2b42 Mar 19 10:29:20; info; kernel:[ 93.796733] [mwifiex_pcie_get_fw_name]:2966 - revision_id:0011 - version:0003 - magic:0024 Mar 19 10:29:20; info; kernel:[ 93.796737] [mwifiex_pcie_get_fw_name]:2977 - adapter->fw_name:mrvl/pcieuart8997_combo_v4.bin Mar 19 10:29:21; info; kernel:[ 94.759628] mwifiex_pcie 0000:01:00.0: info: FW download over, size 583628 bytes Mar 19 10:29:23; info; kernel:[ 97.022199] mwifiex_pcie 0000:01:00.0: WLAN FW is active Mar 19 10:29:23; info; kernel:[ 97.055227] mwifiex_pcie 0000:01:00.0: Unknown api_id: 3 Mar 19 10:29:23; info; kernel:[ 97.082838] mwifiex_pcie 0000:01:00.0: info: MWIFIEX VERSION: mwifiex 1.0 (16.68.1.p70) Mar 19 10:29:23; info; kernel:[ 97.082849] mwifiex_pcie 0000:01:00.0: driver_version = mwifiex 1.0 (16.68.1.p70) Mar 19 10:29:23; notice; softap-init: Adding interface uap0... Mar 19 10:29:24; info; ifplugd(wlan0)[313]: Using detection mode: IFF_RUNNING Mar 19 10:29:24; info; ifplugd(wlan0)[313]: Link beat detected. Mar 19 10:29:24; info; kernel:[ 97.934936] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready Mar 19 10:29:25; info; ifplugd(wlan0)[313]: Link beat lost.

It seem like pcieuart8997_combo_v4.bin firmware (version 16.68.1.p70) is being downloaded correctly.

And it seems ike pcie/wifi is working - I can do a "iw wlan0 scan" (renamed from "mlan" to "wlan").

But... I cannot get bluetooth to work.

I have verified the following:

- RX and TX on CPU/M.2 are crossed as expected. Also RTS/CTS is crossed,

- Before modprobe we continuously get this message "a5 10 00 ef ff" from module.

- After loading firmware (modprobe) RTS signal goes low. And the message from above stop being transmitted from module.

- I am 99% sure that it is the WIFI module that lowers the RTS signal as no interaction with uart should be caused by the modprobe.

- I do a: "hciattach /dev/ttymxc1 any 115200 noflow" and this message is sent to module: "01 09 10 00" (visible on logic analyzer).

- We never get any reply from module as if bluetooth is not running.

I have the following questions that you might help me with:

Q1) Is there any way I can assure that the bluetooth uart part is runing (firmware has been loaded). Reading back registers etc.?

Q2) Do you have any idea why the RTS signal goes low after loading the firmware?

Q3) Is it the correct firmware for this module e.g version etc? I tried with version 16.92.10.p213 as well?

Q4) Should I be able to make the module (8997 chipset) operate on my version of Linux?

I have already spend some days on this and any help would really be appreciated.

Thanks in advance Flemming

Re: Problem with 8997 PCIEUART

jimmychan — Thu, 20 Mar 2025 09:28:30 GMT

Is there any error log after you type ""hciattach /dev/ttymxc1 any 115200 noflow" "?

Re: Problem with 8997 PCIEUART

robot1 — Thu, 20 Mar 2025 11:07:26 GMT

Hello Jimmy

The hciattach gives following:

/ # hciattach /dev/ttymxc1 any 115200 noflow Device setup complete [ 66.402244] Bluetooth: hci0 command 0x1003 tx timeout [ 68.482150] Bluetooth: hci0 command 0x1001 tx timeout [ 70.562285] Bluetooth: hci0 command 0x1009 tx timeout

But what I also wonder is why RTS drops low after firmware download(these are the signals as seen from IMX6):

I also see a "01 09 10 00" sequence being transmitted on the TX with some seconds interval, as of above log.

Kind regard Flemming

Re: Problem with 8997 PCIEUART

weidong_sun — Wed, 26 Mar 2025 03:00:32 GMT

Dear @robot1 ,

I checked your wifi module, it is advantech AIW-154, so you are using M.2 card based on 8997.

1. driver you are using is not correct.

I saw your linux kernel version is 4.9.85(i.mx6q linux bsp for L4.9 should be L4.9.88, not 4.9.85), it is very low, and wifi driver is the one released together with linux kernel, you should remove the Marvell driver, and use the latest version.

--driver
#git clone https://github.com/nxp-imx/mwifiex.git
#cd mwifiex
#git tag

some branches for kernel version will be listed, you can select the latest one, form example.

# git checkout lf-6.6.52_2.2.0

--Firmware & wifi_mod_para.conf

.Firmware:

https://github.com/nxp-imx/imx-firmware/tree/lf-6.6.52_2.2.0/nxp/FwImage_8997

-->pcieuart8997_combo_v4.bin

.wifi_mod_para.conf

https://github.com/nxp-imx/imx-firmware/tree/lf-6.6.52_2.2.0/nxp

Download and copy them to /lib/firmware/nxp of your board.

Then build driver source code , and get 2 .ko files: mlan.ko & moal.ko, use the following commands to load driver.

# insmod mlan.ko