How to use the Chip on board WiFi QCA6174 of I.MX8M Quad EVK Board?

[zhangweikanghus]

Hi,expert

      I have a I.MX8M Quad EVK board, and I want to use the  Chip on board WiFi QCA6174. My Linux BSP is L4.9.88_2.0.0_images_MX8MQ.tar.gz which download from Nxp.com. The Qca6174 wlan chip could be found as the log below:

     root@imx8mqevk:~# lspci
00:00.0 PCI bridge: Synopsys, Inc. Device abcd (rev 01)
01:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32).

    But I could not find the dev node such as wlan0 when I used the ifconfig, the log below:

root@imx8mqevk:~# ifconfig
eth0 Link encap:Ethernet HWaddr 00:04:9f:05:a8:48
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::204:9fff:fe05:a848/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:39484 errors:0 dropped:0 overruns:0 frame:0
TX packets:18366 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:46890238 (44.7 MiB) TX bytes:2959480 (2.8 MiB)

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:10962 errors:0 dropped:0 overruns:0 frame:0
TX packets:10962 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:789580 (771.0 KiB) TX bytes:789580 (771.0 KiB)

    In addition, the wlan driver info is:

root@imx8mqevk:~# modinfo wlan
filename: /lib/modules/4.9.88-imx_4.9.88_2.0.0_ga+g5e23f9d/extra/wlan.ko
description: WLAN HOST DEVICE DRIVER
author: Qualcomm Atheros, Inc.
license: Dual BSD/GPL
alias: pci:v0000168Cd00000043sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000042sv*sd*bc*sc*i*
alias: pci:v0000168Cd0000003Esv*sd*bc*sc*i*
alias: pci:v0000168Cd0000003Csv*sd*bc*sc*i*
depends:
vermagic: 4.9.88-imx_4.9.88_2.0.0_ga+g5e23f9d SMP preempt mod_unload aarch64
parm: msienable:int
parm: vow_config:Do VoW Configuration (uint)
parm: ioctl_debug:int
parm: con_mode:int
parm: enable_dfs_chan_scan:int
parm: enable_11d:int
parm: country_code:charp

Finally，I found those log which was printed by the wlan driver：

root@imx8mqevk:~# [ 242.655216] INFO: task systemd-udevd:2817 blocked for more than 120 seconds.
[ 242.662358] Tainted: G O 4.9.88-imx_4.9.88_2.0.0_ga+g5e23f9d #1
[ 242.670061] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 242.678010] systemd-udevd D 0 2817 2802 0x0000020d
[ 242.683635] Call trace:
[ 242.686094] [<ffff000008085e98>] __switch_to+0x90/0xc0
[ 242.691361] [<ffff000008c653f0>] __schedule+0x178/0x590
[ 242.696709] [<ffff000008c65844>] schedule+0x3c/0xa8
[ 242.701711] [<ffff000008c688e4>] schedule_timeout+0x174/0x248
[ 242.707580] [<ffff000008c67680>] __down+0x58/0x90
[ 242.712406] [<ffff000008102e74>] down+0x4c/0x68
[ 242.718035] [<ffff000000f4155c>] HIFExchangeBMIMsg+0x20c/0x330 [wlan]
[ 242.725445] [<ffff000000f47ac4>] bmi_download_firmware+0x64/0x130 [wlan]
[ 242.732900] [<ffff000000edff9c>] vos_open+0x174/0x6c0 [wlan]
[ 242.739277] [<ffff000000d9bca4>] hdd_wlan_startup+0x5ac/0x12e0 [wlan]
[ 242.746455] [<ffff000000f45cc8>] hif_pci_probe+0x5f8/0x858 [wlan]
[ 242.752676] [<ffff000008486c4c>] pci_device_probe+0x9c/0x140
[ 242.758453] [<ffff000008649a40>] driver_probe_device+0x1d0/0x2c8
[ 242.764574] [<ffff000008649bf4>] __driver_attach+0xbc/0xc0
[ 242.770176] [<ffff000008647b34>] bus_for_each_dev+0x4c/0x98
[ 242.775861] [<ffff0000086493b8>] driver_attach+0x20/0x28
[ 242.781286] [<ffff000008648fa8>] bus_add_driver+0x1b8/0x228
[ 242.787045] [<ffff00000864a578>] driver_register+0x60/0xf8
[ 242.792648] [<ffff0000084857a8>] __pci_register_driver+0x38/0x40
[ 242.799392] [<ffff000000f45630>] hif_register_driver+0x18/0x38 [wlan]
[ 242.806509] [<ffff000000d93d80>] hdd_hif_register_driver+0x30/0x78 [wlan]
[ 242.814025] [<ffff0000012010b4>] hdd_module_init+0xb4/0x1000 [wlan]
[ 242.820418] [<ffff000008083a50>] do_one_initcall+0x38/0x130
[ 242.826108] [<ffff0000081767d8>] do_init_module+0x5c/0x1bc
[ 242.831708] [<ffff000008139650>] load_module+0x1c50/0x20f8
[ 242.837310] [<ffff000008139d78>] SyS_finit_module+0xa8/0xc0
[ 242.842994] [<ffff0000080838d8>] __sys_trace_return+0x0/0x4
[ 363.487140] INFO: task systemd-udevd:2817 blocked for more than 120 seconds.
[ 363.494212] Tainted: G O 4.9.88-imx_4.9.88_2.0.0_ga+g5e23f9d #1
[ 363.501986] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 363.509938] systemd-udevd D 0 2817 2802 0x0000020d
[ 363.515567] Call trace:
[ 363.518025] [<ffff000008085e98>] __switch_to+0x90/0xc0
[ 363.523289] [<ffff000008c653f0>] __schedule+0x178/0x590
[ 363.528640] [<ffff000008c65844>] schedule+0x3c/0xa8
[ 363.533638] [<ffff000008c688e4>] schedule_timeout+0x174/0x248
[ 363.539508] [<ffff000008c67680>] __down+0x58/0x90
[ 363.544335] [<ffff000008102e74>] down+0x4c/0x68
[ 363.549960] [<ffff000000f4155c>] HIFExchangeBMIMsg+0x20c/0x330 [wlan]
[ 363.557449] [<ffff000000f47ac4>] bmi_download_firmware+0x64/0x130 [wlan]
[ 363.565110] [<ffff000000edff9c>] vos_open+0x174/0x6c0 [wlan]
[ 363.571488] [<ffff000000d9bca4>] hdd_wlan_startup+0x5ac/0x12e0 [wlan]
[ 363.578621] [<ffff000000f45cc8>] hif_pci_probe+0x5f8/0x858 [wlan]
[ 363.584840] [<ffff000008486c4c>] pci_device_probe+0x9c/0x140
[ 363.590619] [<ffff000008649a40>] driver_probe_device+0x1d0/0x2c8
[ 363.596737] [<ffff000008649bf4>] __driver_attach+0xbc/0xc0
[ 363.602343] [<ffff000008647b34>] bus_for_each_dev+0x4c/0x98
[ 363.608027] [<ffff0000086493b8>] driver_attach+0x20/0x28
[ 363.613456] [<ffff000008648fa8>] bus_add_driver+0x1b8/0x228
[ 363.619146] [<ffff00000864a578>] driver_register+0x60/0xf8
[ 363.624747] [<ffff0000084857a8>] __pci_register_driver+0x38/0x40
[ 363.631495] [<ffff000000f45630>] hif_register_driver+0x18/0x38 [wlan]
[ 363.638609] [<ffff000000d93d80>] hdd_hif_register_driver+0x30/0x78 [wlan]
[ 363.646136] [<ffff0000012010b4>] hdd_module_init+0xb4/0x1000 [wlan]
[ 363.652531] [<ffff000008083a50>] do_one_initcall+0x38/0x130
[ 363.658224] [<ffff0000081767d8>] do_init_module+0x5c/0x1bc
[ 363.663822] [<ffff000008139650>] load_module+0x1c50/0x20f8
[ 363.669424] [<ffff000008139d78>] SyS_finit_module+0xa8/0xc0
[ 363.675114] [<ffff0000080838d8>] __sys_trace_return+0x0/0x4

Can you tell me how I can solve this problem and the steps for using the wlan chip QCA6174.

[m919040_cheng]

Hello Sir, 

Does anyone can operate QCA6174A/Bluetooth device on i.MX8_EVK ? based on "L4.9.88_2.0.0-ga" or "Android8.1.0"

No problem in QCA6174A/wlp1s0 , but QCA6174/Bluetooth function failed.

Eric

[igorpadykov · Accepted solution]

Hi wei kang

one can try steps described in sect.4.12.2.5 Configuring WLAN from User Space

attached Linux Manual. As stated on p.19 Release Notes:

For i.MX 8MQuad, it needs to add kernel parameter "pci=nomsi" to support Murata 1CQ Wi-Fi.

Best regards
igor
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[zhangweikanghus]

Hi, igorpadykov

Thank you,I have solved this problem from your answer.

[nguyentuan_k58h]

Hi weikang,

What file did you change to solve this problem?