Re: [PATCH] brcmfmac: use ISO3166 country code and 0 rev as fallback

From: Arend van Spriel <arend.vanspriel@broadcom.com>
To: Shawn Guo <shawn.guo@linaro.org>, Kalle Valo <kvalo@codeaurora.org>
Cc: "Rafał Miłecki" <rafal@milecki.pl>,
	"Arend van Spriel" <aspriel@gmail.com>,
	"Franky Lin" <franky.lin@broadcom.com>,
	"Hante Meuleman" <hante.meuleman@broadcom.com>,
	"Chi-hsien Lin" <chi-hsien.lin@infineon.com>,
	"Wright Feng" <wright.feng@infineon.com>,
	"Chung-hsien Hsu" <chung-hsien.hsu@infineon.com>,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
	brcm80211-dev-list.pdl@broadcom.com,
	SHA-cyfmac-dev-list@infineon.com
Subject: Re: [PATCH] brcmfmac: use ISO3166 country code and 0 rev as fallback
Date: Wed, 28 Apr 2021 14:03:07 +0200	[thread overview]
Message-ID: <b6c5713f-ebf0-9eaf-e871-d5690a6b7c10@broadcom.com> (raw)
In-Reply-To: <20210425110200.3050-1-shawn.guo@linaro.org>

On 4/25/2021 1:02 PM, Shawn Guo wrote:
> Instead of aborting country code setup in firmware, use ISO3166 country
> code and 0 rev as fallback, when country_codes mapping table is not
> configured.  This fallback saves the country_codes table setup for recent
> brcmfmac chipsets/firmwares, which just use ISO3166 code and require no
> revision number.

I am somewhat surprised, but with the brcm-spinoffs (cypress/infineon 
and synaptics) my understanding may have been surpassed by reality. 
Would you happen to know which chipsets/firmwares require only ISO3166 
code and no rev?

Regards,
Arend
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> ---
>   .../broadcom/brcm80211/brcmfmac/cfg80211.c      | 17 +++++++++++------
>   1 file changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> index f4405d7861b6..6cb09c7c37b6 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> @@ -7442,18 +7442,23 @@ static s32 brcmf_translate_country_code(struct brcmf_pub *drvr, char alpha2[2],
>   	s32 found_index;
>   	int i;
>   
> -	country_codes = drvr->settings->country_codes;
> -	if (!country_codes) {
> -		brcmf_dbg(TRACE, "No country codes configured for device\n");
> -		return -EINVAL;
> -	}
> -
>   	if ((alpha2[0] == ccreq->country_abbrev[0]) &&
>   	    (alpha2[1] == ccreq->country_abbrev[1])) {
>   		brcmf_dbg(TRACE, "Country code already set\n");
>   		return -EAGAIN;
>   	}
>   
> +	country_codes = drvr->settings->country_codes;
> +	if (!country_codes) {
> +		brcmf_dbg(TRACE, "No country codes configured for device, using ISO3166 code and 0 rev\n");
> +		memset(ccreq, 0, sizeof(*ccreq));
> +		ccreq->country_abbrev[0] = alpha2[0];
> +		ccreq->country_abbrev[1] = alpha2[1];
> +		ccreq->ccode[0] = alpha2[0];
> +		ccreq->ccode[1] = alpha2[1];
> +		return 0;
> +	}
> +
>   	found_index = -1;
>   	for (i = 0; i < country_codes->table_size; i++) {
>   		cc = &country_codes->table[i];
> 