В 13:35 +0200 на 12.07.2017 (ср), Johan Hovold написа: > [ Please avoid top-posting. ] > > On Wed, Jul 12, 2017 at 01:16:00PM +0300, Anton Avramov wrote: > > > > I've tried > > modprobe cdc-acm > > echo fff0 0100 > /sys/bus/usb/drivers/cdc_acm/new_id > > > > But it didn't show as a device. > > Here is the relevant output of dmesg: > > [ 379.300082] cdc_acm 4-2:1.0: Zero length descriptor references > > [ 379.300112] cdc_acm: probe of 4-2:1.0 failed with error -22 > > [ 379.300134] cdc_acm 4-2:1.1: Zero length descriptor references > > [ 379.300141] cdc_acm: probe of 4-2:1.1 failed with error -22 > > > > And here is the output of lsusb -v -d fff0:0100 > > > > Bus 004 Device 002: ID fff0:0100 > > Device Descriptor: > > bLength 18 > > bDescriptorType 1 > > bcdUSB 1.01 > > bDeviceClass 2 Communications > > bDeviceSubClass 0 > > bDeviceProtocol 0 > > bMaxPacketSize0 64 > > idVendor 0xfff0 > > idProduct 0x0100 > > bcdDevice 1.00 > > iManufacturer 1 DATECS > > iProduct 2 Fiscal Printer FP-2000 > > iSerial 3 DT653794 > > bNumConfigurations 1 > > Configuration Descriptor: > > bLength 9 > > bDescriptorType 2 > > wTotalLength 48 > > bNumInterfaces 2 > > bConfigurationValue 1 > > iConfiguration 0 > > bmAttributes 0xc0 > > Self Powered > > MaxPower 0mA > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 0 > > bAlternateSetting 0 > > bNumEndpoints 1 > > bInterfaceClass 2 Communications > > bInterfaceSubClass 2 Abstract (modem) > > bInterfaceProtocol 0 None > > iInterface 0 > > Endpoint Descriptor: > > bLength 7 > > bDescriptorType 5 > > bEndpointAddress 0x81 EP 1 IN > > bmAttributes 3 > > Transfer Type Interrupt > > Synch Type None > > Usage Type Data > > wMaxPacketSize 0x0008 1x 8 bytes > > bInterval 255 > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 1 > > bAlternateSetting 0 > > bNumEndpoints 2 > > bInterfaceClass 10 CDC Data > > bInterfaceSubClass 0 Unused > > bInterfaceProtocol 0 > > iInterface 0 > > Endpoint Descriptor: > > bLength 7 > > bDescriptorType 5 > > bEndpointAddress 0x02 EP 2 OUT > > bmAttributes 2 > > Transfer Type Bulk > > Synch Type None > > Usage Type Data > > wMaxPacketSize 0x0040 1x 64 bytes > > bInterval 0 > > Endpoint Descriptor: > > bLength 7 > > bDescriptorType 5 > > bEndpointAddress 0x82 EP 2 IN > > bmAttributes 2 > > Transfer Type Bulk > > Synch Type None > > Usage Type Data > > wMaxPacketSize 0x0040 1x 64 bytes > > bInterval 0 > > Device Status: 0x0001 > > Self Powered > It seems you need the NO_UNION_NORMAL quirk. Does the following work > better? > > echo fff0 0100 2 076d 0006 > > /sys/bus/usb/drivers/cdc_acm/new_id > > Johan Yes, it works great. Thank you very much. -- Anton Avramov <lukav@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
