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From: Sergei Epiphanov <serpiph@nikiet.ru>
To: sisyphus@lists.altlinux.org
Subject: [sisyphus] Работа USB-подсистемы
Date: Tue, 18 Dec 2012 12:08:17 +0400
Message-ID: <1723253.SyWZz8Bv8F@epiphanov.bkpi82.nikiet.ru> (raw)

У меня возник вопрос с подключением устройств к USB-порту. Точнее, есть плеер, 
который представляется как USB-диск. Но проблема в том, что для такого 
представления он перед подключением к компьютеру должен быть выключен. Процесс 
включения и перехода в режим USB-диска небыстрый, из-за чего драйвер USB-порта 
опрашивает порт, видит устройство, которое сначала откликается, но при 
загрузке плеер не отвечает. Из-за этого порт выводится из работы, а плеер 
переходит в режим простой зарядки. При этом винда на том же компьютере 
нормально связывается с плеером.

Можно ли что-то покрутить в хозяйстве USB в ядре (таймауты или иное), чтобы 
система не отвергала слишком рано плеер?

Логи:

kernel: [  341.057334] usb 2-6: new high-speed USB device number 3 using 
ehci_hcd
kernel: [  341.190040] usb 2-6: New USB device found, idVendor=0755, 
idProduct=2205
kernel: [  341.190045] usb 2-6: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
kernel: [  341.190048] usb 2-6: Product: HFPlayer
kernel: [  341.190051] usb 2-6: Manufacturer: Colorfly
kernel: [  341.190054] usb 2-6: SerialNumber: USBV1.00
kernel: [  341.190732] scsi23 : usb-storage 2-6:1.0
mtp-probe: checking bus 2, device 3: 
"/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-6"
mtp-probe: bus: 2, device: 3 was not an MTP device
kernel: [  341.497075] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  341.912816] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  342.193322] scsi 23:0:0:0: Direct-Access     Colorfly PocketHIFI       
1.00 PQ: 0 ANSI: 0
kernel: [  342.195586] scsi 23:0:0:1: Direct-Access     Colorfly PocketHIFI 
Card  1.00 PQ: 0 ANSI: 0
kernel: [  342.206500] sd 23:0:0:0: [sdf] Attached SCSI removable disk
kernel: [  342.208806] sd 23:0:0:1: [sdg] Attached SCSI removable disk
kernel: [  342.316610] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  342.728298] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  343.140072] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  343.547853] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  343.955517] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  344.363313] usb 2-5: reset high-speed USB device number 2 using 
ehci_hcd
kernel: [  344.451999] sd 23:0:0:1: [sdg] 62333952 512-byte logical blocks: 
(31.9 GB/29.7 GiB)
kernel: [  344.452373] sd 23:0:0:0: [sdf] 64819200 512-byte logical blocks: 
(33.1 GB/30.9 GiB)
kernel: [  344.607171] usb 2-6: reset high-speed USB device number 3 using 
ehci_hcd
kernel: [  344.855022] usb 2-6: reset high-speed USB device number 3 using 
ehci_hcd
kernel: [  345.102889] usb 2-6: reset high-speed USB device number 3 using 
ehci_hcd
kernel: [  345.214815] usb 2-6: USB disconnect, device number 3
kernel: [  345.218961] scsi 23:0:0:0: rejecting I/O to offline device
kernel: [  345.218967] scsi 23:0:0:0: killing request
kernel: [  345.219003] scsi 23:0:0:0: [sdf] Asking for cache data failed
kernel: [  345.219009] scsi 23:0:0:0: [sdf] Assuming drive cache: write 
through
kernel: [  345.222793] sd 23:0:0:1: [sdg] Asking for cache data failed
kernel: [  345.222795] sd 23:0:0:1: [sdg] Assuming drive cache: write through
kernel: [  345.222922] sd 23:0:0:1: [sdg] READ CAPACITY failed
kernel: [  345.222925] sd 23:0:0:1: [sdg]
kernel: [  345.222927] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
kernel: [  345.222928] sd 23:0:0:1: [sdg] Sense not available.
kernel: [  345.222974] sd 23:0:0:1: [sdg] Asking for cache data failed
kernel: [  345.222976] sd 23:0:0:1: [sdg] Assuming drive cache: write through
kernel: [  345.222978] sdg: detected capacity change from 31914983424 to 0

-- 
С уважением, Епифанов Сергей

             reply	other threads:[~2012-12-18  8:08 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-18  8:08 Sergei Epiphanov [this message]
2012-12-18 11:28 ` Sergey V Turchin
2012-12-18 19:32 ` Sergey Vlasov
2012-12-19  7:39   ` Sergei Epiphanov
2012-12-19  7:57   ` Sergei Epiphanov

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