I made my own custom PCB with CM3 (NEC version, 16GB eMMC).
I added Murata LBEE5KL1DX wifi SDIO module to the PCB and connected at GPIO 34-39.
I installed latest Rasbian and changed device tree (GPIO 34-39 as ALT3 (SD1)).
I also added Murata's NVRAM file to CM3.
But Rpi can not recognize wifi module.
I checked SDIO line with protocol analyzer and the communication line is alive.
Rpi sent SDIO command and WIFI module responses according to SDIO protocol.
Rpi SDIO channel sent CMD0, CMD8, CMD5, CMD5, CMD3, CMD7, and CMD52 and WIFI module responded.
After that, a bunch of CMD52 were sent and wifi also responded.
Consequently, the Rpi sent CMD55 five times and CMD0.
At this time linux booting log was 'MMC1: -110 whilst initialising SD card'.
After that the Rpi repreated these sequence 3 times.
So I think the wifi module properly worked but the Rpi can not properly loaded WIFI driver.
What should I do or check to solve this situation?
Please give me any comment about similar problems.