Re: [PATCH] Airprime driver improvements to allow full speed EvDO transfers

Jeremy Fitzhardinge
2006-07-03T07:00:39Z

Andy Gay wrote:
> BTW - Jeremy suggested that the number of EPs to configure should be
> determined from the device ID. Makes sense to me, but then many users
> may have no use for the additional EPs. Alternatively, Greg suggested
> that maybe this should split into 2 drivers. Any preferences, anyone?
>
I think if the hardware has the EPs, they should be exposed by the
driver. You can tweak usermode as to whether they get device nodes,
what they're called, etc.
> I don't know which of these devices present multiple EPs though. Can you
> send me the appropriate section from 'cat /proc/bus/usb/devices'?
>
Phil Karn mentions on http://www.ka9q.net/5220.html:

It may help to know what's actually inside the 5220 card. It
contains a Qualcomm MSM 5500 mobile station modem chip that
implements the actual 1xEV-DO functionality. This chip has a native
USB 1.1 interface that emulates two USB serial ports. The first
provides a classic serial modem interface that accepts AT commands
and PPP data. The second is reserved for diagnostics and is unused.

For completeness:

T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1199 ProdID=0218 Rev= 0.01
S: Manufacturer=Sierra Wireless
S: Product=Sierra Wireless MC5720 Modem
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 7 Cls=ff(vend.) Sub=ff Prot=ff Driver=airprime
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=84(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=85(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=05(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms

J