2015-10-09 4:09 GMT+09:00 Jes Sorensen <Jes.Sorensen@xxxxxxxxxx>:
> Jakub Sitnicki <jsitnicki@xxxxxxxxx> writes:
>> Hi Jes,
>>
>> On Sat, Aug 29, 2015 at 11:18 PM CEST, Jes.Sorensen@xxxxxxxxxx wrote:
>>> This is an alternate driver for a number of Realtek WiFi USB devices,
>>> including RTL8723AU, RTL8188CU, RTL8188RU, RTL8191CU, and RTL8192CU.
>>> It was written from scratch utilizing the Linux mac80211 stack.
>>>
>>> After spending months cleaning up the vendor provided rtl8723au
>>> driver, which comes with it's own 802.11 stack included, I decided to
>>> rewrite this driver from the bottom up.
>>
>> In the long term, do you plan for this driver to support the
>> RTL8188EU-based devices as well?
>
> I have an 8188EU dongle in my wifi dongle pouch, together with several
> other yet to be supported ones :) I am currently trying to get the
> 8723BU and 8192EU working, but I haven't had time to work much on the
> 8188EU yet.
>
>> I've been checking how far I can get through the rtl8xxxu initialization
>> using a TP-Link TL-WN725N dongle without changing too much.
>>
>> Getting it up to read the EFUSE contents wasn't difficult but then you
>> need to parse it and first differences come to light. Namely, TX power
>> levels are defined per each of 6 (not 3) channel groups, and power
>> differences are defined per TX path (as opposed to per channel group).
>> This is perhaps better described by the relevant structure from
>> rtl8188eu driver:
>>
>> struct txpowerinfo24g {
>> u8 IndexCCK_Base[MAX_RF_PATH][MAX_CHNL_GROUP_24G];
>> u8 IndexBW40_Base[MAX_RF_PATH][MAX_CHNL_GROUP_24G];
>> /* If only one tx, only BW20 and OFDM are used. */
>> s8 CCK_Diff[MAX_RF_PATH][MAX_TX_COUNT];
>> s8 OFDM_Diff[MAX_RF_PATH][MAX_TX_COUNT];
>> s8 BW20_Diff[MAX_RF_PATH][MAX_TX_COUNT];
>> s8 BW40_Diff[MAX_RF_PATH][MAX_TX_COUNT];
>> };
>>
>> AFAICT, in this regard, rtl8188eu driver has more in common with the
>> rtlwifi/rtl8188ee driver.
>>
>> I'm curious what is your opinion on this. In particular, do you see any
>> reason not to make an attempt to extend rtl8xxxu to support 8188EU
>> chips?
>
> Parsing the efuse is normally fairly easy, if you have a reference to
> the layout. It can be deducted from the vendor driver code. The layout
> pretty much differ for each chip, but I have seen enough of them by now
> that I can parse most of it by looking at the hex dump.
>
> I think the 8188EU uses IOL, which is an enhanced firmware assist API.
> That will change the programming a bit, but I think it's well within
> scope for this driver to support this as well.
>
> In other words, it is my plan to look at the 8188EU. If you get it going
> before me, I am very happy to work with you on integrating the patches.
>
> Cheers,
> Jes
> --
> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi
I am currently writing a rtl8188eu driver that is using rtlwifi.
I think this driver can help you to support the RTL8188EU chip.
https://github.com/TaeheeYoo/rtl8188eu
Thanks,
Taehee
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
