On Friday, January 17, 2014 2:54:45 AM UTC-5, Puneet B wrote:
>
> Hi,
>
> While tracing problem i found below issue.
>
> i am getting error in log as:
>
> [ 4.780261] [dhd_module_init] get wl_host_wake gpio failed
>
> The code is from here:./
>
> vim linux-sunxi/drivers/net/wireless/bcmdhd/dhd_linux.c +4396
>
> if (gpio_request(WL_HOST_WAKE_DEF_GPIO, "wl_host_wake")) {
> pr_warning("[%s] get wl_host_wake gpio failed\n",
> __FUNCTION__);
> wl_host_wake = -1;
> return -1;
> }
>
> Which means some gpio error:
>
> In script for wifi:
> ap6xxx_wl_regon = port:PH09<1><default><default><0>
> ap6xxx_wl_host_wake = port:PH10<0><default><default><0>
> ap6xxx_bt_regon = port:PB05<1><default><default><0>
> ap6xxx_bt_wake = port:PI20<1><default><default><0>
> ap6xxx_bt_host_wake = port:PI21<0><default><default><0>
> ap6xxx_lpo = port:PI12<4><default><default><default>
>
>
> For ap6xxx_wl_host_wake , i check by making high and low but error is
> same.
>
> Can any one tell why that error is, Is it because of some gpio pins or
> something else went wrong?
>
> Regards
> Punith
>
> The problem is that the stock bcmdhd driver doesn't know how to toggle the
allwinner gpios to turn on the chip. Cubietech made some changes for that
to drivers/net/wireless/bcmdhd/dhd_custom_gpio.c, which is meant by
Broadcom to be customized to different boards (thus the "custom" in the
name). It could all be abstracted pretty easily in the 3.4 linux-sunxi
kernel, except for a few new calls to sunximmc_rescan_card made after power
off and power on (probably not needed after the power off).
The mainline kernel abstracts this stuff much better than 3.4, so
backporting might not be so easy.
Pat
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