Porting CYW43438 to Exynos4412 Platfotm

Anonymous · ‎Dec 12, 2017

Dear Everyone,

I am porting 43438 to samsuang 4412 platform. I have finished the platform driver , and connect the 43438 device to the Host SDIO port.

The driver run as below:

dhd_module_init: Enter

[ 717.489594] tomitest. enable
CONFIG_WIFI_CONTROL_FUNC

[ 717.495162] ## Calling
platform_driver_register

[ 717.511256] ## wifi_probe

[ 717.512441] wifi_set_power = 1

[ 717.515692] BCM_wifi_power: 1

[ 717.518427] [CYW43438] +++
BCM_wifi_power : wlan poweron

[ 717.675453] [CYW] ---BCM_wifi_power

[ 717.677468] wifi_set_carddetect = 1

[ 717.681074] [CYW]
---BCM_wifi_set_carddetect

[ 717.685226]
+sdhci_s3c_sdio_card_detect

[ 717.689026] -sdhci_s3c_sdio_card_detect

[ 717.694531] dhd_bus_register: Enter

[ 717.705095]

[ 717.705099] Dongle Host Driver,
version 5.90.125.94.1

[ 717.705104] Compiled in
drivers/net/wireless/bcmdhd on Dec 5 2017 at 01:55:03

[ 717.775049] *******mmc2:
inserted!!!!!******

From the log as above, the host SDIO driver has scaned the device, but it can't find 43438 until timeout.

I catch the SDIO timing sequence using logic analyzer , it show as below.

Time,

Value,Description ,

...

The host has scaned devices using CMD, but the device(43438) coundn't be founded.

So, who can give me support to fix this issue?

Anonymous · ‎Dec 14, 2017

About my issue, I have two questions need your support.

1. How about the CYW43438 IO voltage range? Just as the SPEC :1.8V~3.3V?

2.How about the SDIO CMD sequence needed when SDIO BUS recognize the physical device?

Re: Porting CYW43438 to Exynos4412 Platfotm