From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZTvad-0005Sf-QL for ath10k@lists.infradead.org; Mon, 24 Aug 2015 17:31:24 +0000 From: "Peter Oh" References: <006a01d0de35$1bde70a0$539b51e0$@netlab.snu.ac.kr> <55DB4720.1090106@candelatech.com> In-Reply-To: <55DB4720.1090106@candelatech.com> Subject: RE: How to access the CCA related operation Date: Mon, 24 Aug 2015 10:31:01 -0700 Message-ID: <000001d0de92$a6028980$f2079c80$@codeaurora.org> MIME-Version: 1.0 Content-Language: en-us List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: 'Ben Greear' , 'Seowoo Jang' , ath10k@lists.infradead.org There is WMI_10_x_SET_CCA_PARAMS_CMDID which to enable adaptive CCA in firmware supported since 10.2.4 and all the actual operations are done in firmware with registers as Ben addressed. But I'm not clear how much register doc or firmware doc are opened to public legally. Thanks, Peter -----Original Message----- From: ath10k [mailto:ath10k-bounces@lists.infradead.org] On Behalf Of Ben Greear Sent: Monday, August 24, 2015 9:33 AM To: Seowoo Jang; ath10k@lists.infradead.org Subject: Re: How to access the CCA related operation It is in firmware, and you cannot reliably poke it through the driver read/write register API because each time the radio resets (channel change, etc), it is liable to re-write the CCA registers back to default values. There is a large list of registers with 'CCA' in the name, but I don't know what they really mean, and I had hard time getting that info out of QCA. If you have any better luck, please post whatever you can share. Thanks, Ben On 08/23/2015 11:21 PM, Seowoo Jang wrote: > Hello, > > We are trying to evaluate our idea on 802.11ac protocol with Atheros > qca9880 / ath10k driver. > > We would like to be able to access/know the result of the CCA (clear > channel > assessment) operation > or the level of interference on the carrier when we need. > > We have dug into the driver files and concluded that the CCA related > values are likely in the firmware or on the registers of the hardware. > > And please correct us if we are thinking wrong. > > We would appreciate the help if someone can give us some starting > points, such as the address of the register that stores the carrier > sensing values (CCA values) or the result of it (whether the carrier > is busy or idle), to investigate. > > The chipset we are using is compex WLE900VX-7AA. > > We are currently using Ubuntu 14.04.03 with kernel version 4.1.5, but > we can use any versions of OS and kernel if they support 802.11ac > bandwidth. > > Thank you for help in advance. > > ------------------------------- > Seowoo Jang, Ph.D. > Ubiquitous Network Laboratory > EECS, Seoul National University > > CEL +82-10-3723-3401 > E-mail swjang@netlab.snu.ac.kr > ------------------------------- > > > _______________________________________________ > ath10k mailing list > ath10k@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/ath10k > -- Ben Greear Candela Technologies Inc http://www.candelatech.com _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k