From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arend van Spriel <arend@broadcom.com>
Date: Thu, 20 Jun 2013 15:17:03 +0200
Subject: [ath9k-devel] Supported Wi-Fi direct of Android?
In-Reply-To: <CAPsAkd-A_uwbGOP+LZ_dkr78vNRktS9Z=bvdjbsW2SpMgqkLOw@mail.gmail.com>
References: <CAPsAkd-A_uwbGOP+LZ_dkr78vNRktS9Z=bvdjbsW2SpMgqkLOw@mail.gmail.com>
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To: ath9k-devel@lists.ath9k.org

On 06/20/2013 02:44 PM, Check Zhao wrote:
> Hi list,
>
> I want to enable concurrently the wlan0 and p2p0 interface with the usb
> wifi dongle on PCs,
> It is similar to the Wi-Fi direct of Android-4.2.2(Samsung Galaxy Nexus).
>
> I found out Galaxy Nexus Wi-Fi chip is Broadcom BCM4330, but I can't buy
> a usb dongle used this chip, however I can buy TP-LINK TL-WN722N with
> using ar9271( ath9k_htc driver).
>
> Now I want to know if ath9k_htc driver support to enable concurrently
> the wlan0 and p2p0 interface, and how to support this functionality with
> coding.
>
> Please help!

 From the code:

static const struct ieee80211_iface_limit if_limits[] = {
	{ .max = 2,	.types = BIT(NL80211_IFTYPE_STATION) |
				 BIT(NL80211_IFTYPE_P2P_CLIENT) },
	{ .max = 2,	.types = BIT(NL80211_IFTYPE_AP) |
				 BIT(NL80211_IFTYPE_P2P_GO) },
};

static const struct ieee80211_iface_combination if_comb = {
	.limits = if_limits,
	.n_limits = ARRAY_SIZE(if_limits),
	.max_interfaces = 2,
	.num_different_channels = 1,
};

It has P2P support, but it is a mac80211 driver and it may need 
P2P_DEVICE support as well. Johannes?

Regards,
Arend

> Some reference information:
>
> /http://readlist.com/lists/shmoo.com/hostap/3/15004.html/
>
> ------------------------------------------------------------------------------------------------------------------
> /> To me it seem YanBo is working with a mac80211 driver and asking how to
>> tell mac80211 it can support multiple (concurrent) interfaces.
>
> Same like for cfg80211, advertise interface combinations? And if you
> advertise a combination with P2P_DEVICE then wpa_s (with these patches)
> will pick it up and create one.
>
> johannes/
> -------------------------------------------------------------------------------------------------------------------
>
> Best Regards,
>
> Chengyi
>