Hi, Your iPhone times out when reading the configuration descriptor:
19:05:57.365047 usbus4.2 SUBM-CTRL-EP=00000080,SPD=HIGH,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 02 02 00 00 09 00 -- -- -- -- -- -- -- -- |........ | frame[1] READ 9 bytes flags 0x10 <PROXY_BUFFER|0> status 0xea1a3 <OPEN|TRANSFERRING|STARTED|CONTROL_XFR|CONTROL_HDR|BDMA_ENABLE|BDMA_SETUP|CURR_DMA_SET|CAN_CANCEL_IMMED|DOING_CALLBACK|0> 19:05:57.365404 usbus4.2 DONE-CTRL-EP=00000080,SPD=HIGH,NFR=2,SLEN=12,IVAL=0,ERR=0 frame[0] WRITE 8 bytes frame[1] READ 9 bytes 0000 09 02 3E 00 02 03 07 C0 FA -- -- -- -- -- -- -- |..>...... | flags 0x10 <PROXY_BUFFER|0> status 0xca1a1 <OPEN|STARTED|CONTROL_XFR|CONTROL_HDR|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0> 19:05:57.365412 usbus4.2 SUBM-CTRL-EP=00000080,SPD=HIGH,NFR=2,SLEN=8,IVAL=0 frame[0] WRITE 8 bytes 0000 80 06 02 02 00 00 3E 00 -- -- -- -- -- -- -- -- |......>. | frame[1] READ 62 bytes flags 0x10 <PROXY_BUFFER|0> status 0xca1a3 <OPEN|TRANSFERRING|STARTED|CONTROL_XFR|CONTROL_HDR|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0> 19:05:58.353453 usbus4.2 DONE-CTRL-EP=00000080,SPD=HIGH,NFR=0,SLEN=0,IVAL=0,ERR=TIMEOUT flags 0x10 <PROXY_BUFFER|0> status 0xaa1a5 <OPEN|DID_DMA_DELAY|STARTED|CONTROL_XFR|CONTROL_HDR|BDMA_ENABLE|BDMA_SETUP|CURR_DMA_SET|DOING_CALLBACK|0>
Subsequent reads of the configuration descriptor are successful. Probably a driver problem in the USB firmware stack of the iPhone. To figure out what is actually going on you need a USB analyzer connected to the USB cable. The problem you are seeing is probably timing dependant.
BTW: You can add "options USB_REQ_DEBUG" to the kernel config file. Then you will get some more sysctls which affect the timing of control transfers under hw.usb.
You can try contacting Apple about this. I'm sure if you hit the right guy, they will fix try to fix it.
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