Hi ,
This is in continuation of my last mail .
For existing ipod types (eg ipod touch , ipod classic ) ,
we can provide quirk entries at compile time .
what i want to ask is :
can we provide quirk entries when the system is running
so that even if ipod type (VID/PID) is not registered , at run time
we can register its quirk entries ?
Thanx & Regards
Amit Nagal
On Wed, Jun 16, 2010 at 9:50 AM, Amit Nagal <helloin.amit@xxxxxxxxx> wrote:
> Hi Alan ,
>
> Thanx for the reply . The enclosed patch will definately help my cause .
>
> In my case this is required as we want to stream digital audio from
> ipod to our host .
>
> i will definately need to provide quirk entries at run time ,
>
> as at compile time , it will be extremely difficult to put quirk
> entries for all the ipods .
>
> there should be some registration mechanism in user space to specify
> quirk entries at run time .
>
> how we can specify quirk entries while the system is running ?
>
> Thanx & Regards
>
> Amit Nagal
>
>
>
>
>
>
>
>
>
> On Tue, Jun 15, 2010 at 7:49 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
>> On Mon, 14 Jun 2010, Amit Nagal wrote:
>>
>>> Hi Alan ,
>>>
>>> Thanx for the reply .
>>>
>>> Following enclosed are logs :
>>>
>>> cat /proc/bus/usb/devices :
>>>
>>>
>>> T: Bus=02 Lev=01 Prnt=01 Port=05 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
>>> D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 2
>>> P: Vendor=05ac ProdID=1261 Rev= 0.01
>>> S: Manufacturer=Apple Inc.
>>> S: Product=iPod
>>> S: SerialNumber=000A270013A06238
>>> C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=500mA
>>> I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
>>> E: Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>>> E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
>>> C: #Ifs= 3 Cfg#= 2 Atr=c0 MxPwr=500mA
>>> I: If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=
>>> I: If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=
>>> I: If#= 1 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=
>>> E: Ad=81(I) Atr=01(Isoc) MxPS= 192 Ivl=1ms
>>> I: If#= 2 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=
>>> E: Ad=83(I) Atr=03(Int.) MxPS= 64 Ivl=125us
>>
>>> Looking forward to suggested patch .
>>
>> Here it is. However I must warn you: It is highly unlikely this patch
>> will ever be accepted into the offical Linux kernel. Most people who
>> have iPods and plug them into their computers do expect the iPod to be
>> placed in the mass-storage config.
>>
>> About the closest we might come is a change allowing you to specify
>> quirk entries while the system is running.
>>
>> Alan Stern
>>
>>
>>
>> Index: 2.6.34/drivers/usb/core/generic.c
>> ===================================================================
>> --- 2.6.34.orig/drivers/usb/core/generic.c
>> +++ 2.6.34/drivers/usb/core/generic.c
>> @@ -18,6 +18,7 @@
>> */
>>
>> #include <linux/usb.h>
>> +#include <linux/usb/quirks.h>
>> #include "usb.h"
>> #include "hcd.h"
>>
>> @@ -47,6 +48,9 @@ int usb_choose_configuration(struct usb_
>> int insufficient_power = 0;
>> struct usb_host_config *c, *best;
>>
>> + if (udev->quirks & USB_QUIRK_DONT_CONFIGURE)
>> + return -1;
>> +
>> best = NULL;
>> c = udev->config;
>> num_configs = udev->descriptor.bNumConfigurations;
>> Index: 2.6.34/drivers/usb/core/quirks.c
>> ===================================================================
>> --- 2.6.34.orig/drivers/usb/core/quirks.c
>> +++ 2.6.34/drivers/usb/core/quirks.c
>> @@ -50,6 +50,9 @@ static const struct usb_device_id usb_qu
>> /* appletouch */
>> { USB_DEVICE(0x05ac, 0x021a), .driver_info = USB_QUIRK_RESET_RESUME },
>>
>> + /* Apple iPod */
>> + { USB_DEVICE(0x05ac, 0x1261), .driver_info = USB_QUIRK_DONT_CONFIGURE },
>> +
>> /* Avision AV600U */
>> { USB_DEVICE(0x0638, 0x0a13), .driver_info =
>> USB_QUIRK_STRING_FETCH_255 },
>> Index: 2.6.34/include/linux/usb/quirks.h
>> ===================================================================
>> --- 2.6.34.orig/include/linux/usb/quirks.h
>> +++ 2.6.34/include/linux/usb/quirks.h
>> @@ -22,4 +22,7 @@
>> /*device will morph if reset, don't use reset for handling errors */
>> #define USB_QUIRK_RESET_MORPHS 0x00000010
>>
>> +/* device should not be configured by default */
>> +#define USB_QUIRK_DONT_CONFIGURE 0x00000020
>> +
>> #endif /* __LINUX_USB_QUIRKS_H */
>>
>>
>
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