* Alan Stern | 2012-01-11 12:11:57 [-0500]: >On Wed, 11 Jan 2012, Sebastian Andrzej Siewior wrote: >> Well no. Even if you override it in kernel the user still could switch >> it if he wants to. > >How? If usb-storage refuses to bind to devices that support UAS, the >user has no way to force it to bind. I meant if UAS does not work _or_ he prefers BOT, he can still switch back to BOT. >> Felipe, what is Nokia and the other people that have the multi- >> functional gadgets use to switch from one function to the other? > >Do those gadgets use separate _altsettings_ for BOT vs. UAS, or do they >use separate _configs_? They have both. Both configs provide the same functions, if you look at lsusb of the g_multi gadget: |Bus 001 Device 002: ID 1d6b:0104 Linux Foundation Multifunction Composite Gadget |Device Descriptor: | bLength 18 | bDescriptorType 1 | bcdUSB 2.10 | bDeviceClass 239 Miscellaneous Device | bDeviceSubClass 2 ? | bDeviceProtocol 1 Interface Association | bMaxPacketSize0 64 | idVendor 0x1d6b Linux Foundation | idProduct 0x0104 Multifunction Composite Gadget | bcdDevice 3.02 | iManufacturer 13 Linux 3.2.0+ with dummy_udc | iProduct 14 Multifunction Composite Gadget | iSerial 0 | bNumConfigurations 2 | Configuration Descriptor: | bLength 9 | bDescriptorType 2 | wTotalLength 164 | bNumInterfaces 5 | bConfigurationValue 1 | iConfiguration 2 Multifunction with RNDIS | bmAttributes 0xc0 | Self Powered | MaxPower 2mA | Interface Association: | bLength 8 | bDescriptorType 11 | bFirstInterface 0 | bInterfaceCount 2 | bFunctionClass 2 Communications | bFunctionSubClass 6 Ethernet Networking | bFunctionProtocol 0 | iFunction 6 RNDIS | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 0 | bAlternateSetting 0 | bNumEndpoints 1 | bInterfaceClass 2 Communications | bInterfaceSubClass 2 Abstract (modem) | bInterfaceProtocol 255 Vendor Specific (MSFT RNDIS?) | iInterface 4 RNDIS Communications Control | CDC Header: | bcdCDC 1.10 | CDC Call Management: | bmCapabilities 0x00 | bDataInterface 1 | CDC ACM: | bmCapabilities 0x00 | CDC Union: | bMasterInterface 0 | bSlaveInterface 1 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x83 EP 3 IN | bmAttributes 3 | Transfer Type Interrupt | Synch Type None | Usage Type Data | wMaxPacketSize 0x0008 1x 8 bytes | bInterval 9 | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 1 | bAlternateSetting 0 | bNumEndpoints 2 | bInterfaceClass 10 CDC Data | bInterfaceSubClass 0 Unused | bInterfaceProtocol 0 | iInterface 5 RNDIS Ethernet Data | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x81 EP 1 IN | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x02 EP 2 OUT | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Interface Association: | bLength 8 | bDescriptorType 11 | bFirstInterface 2 | bInterfaceCount 2 | bFunctionClass 2 Communications | bFunctionSubClass 2 Abstract (modem) | bFunctionProtocol 1 AT-commands (v.25ter) | iFunction 9 CDC Serial | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 2 | bAlternateSetting 0 | bNumEndpoints 1 | bInterfaceClass 2 Communications | bInterfaceSubClass 2 Abstract (modem) | bInterfaceProtocol 1 AT-commands (v.25ter) | iInterface 7 CDC Abstract Control Model (ACM) | CDC Header: | bcdCDC 1.10 | CDC Call Management: | bmCapabilities 0x00 | bDataInterface 3 | CDC ACM: | bmCapabilities 0x02 | line coding and serial state | CDC Union: | bMasterInterface 2 | bSlaveInterface 3 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x86 EP 6 IN | bmAttributes 3 | Transfer Type Interrupt | Synch Type None | Usage Type Data | wMaxPacketSize 0x000a 1x 10 bytes | bInterval 9 | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 3 | bAlternateSetting 0 | bNumEndpoints 2 | bInterfaceClass 10 CDC Data | bInterfaceSubClass 0 Unused | bInterfaceProtocol 0 | iInterface 8 CDC ACM Data | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x84 EP 4 IN | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x05 EP 5 OUT | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 4 | bAlternateSetting 0 | bNumEndpoints 2 | bInterfaceClass 8 Mass Storage | bInterfaceSubClass 6 SCSI | bInterfaceProtocol 80 Bulk (Zip) | iInterface 1 Mass Storage | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x81 EP 1 IN | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x02 EP 2 OUT | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 1 | Configuration Descriptor: | bLength 9 | bDescriptorType 2 | wTotalLength 169 | bNumInterfaces 5 | bConfigurationValue 2 | iConfiguration 3 Multifunction with CDC ECM | bmAttributes 0xc0 | Self Powered | MaxPower 2mA | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 0 | bAlternateSetting 0 | bNumEndpoints 1 | bInterfaceClass 2 Communications | bInterfaceSubClass 6 Ethernet Networking | bInterfaceProtocol 0 | iInterface 10 CDC Ethernet Control Model (ECM) | CDC Header: | bcdCDC 1.10 | CDC Union: | bMasterInterface 0 | bSlaveInterface 1 | CDC Ethernet: | iMacAddress 12 EE57D9FF7F36 | bmEthernetStatistics 0x00000000 | wMaxSegmentSize 1514 | wNumberMCFilters 0x0000 | bNumberPowerFilters 0 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x83 EP 3 IN | bmAttributes 3 | Transfer Type Interrupt | Synch Type None | Usage Type Data | wMaxPacketSize 0x0010 1x 16 bytes | bInterval 9 | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 1 | bAlternateSetting 0 | bNumEndpoints 0 | bInterfaceClass 10 CDC Data | bInterfaceSubClass 0 Unused | bInterfaceProtocol 0 | iInterface 0 | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 1 | bAlternateSetting 1 | bNumEndpoints 2 | bInterfaceClass 10 CDC Data | bInterfaceSubClass 0 Unused | bInterfaceProtocol 0 | iInterface 11 CDC Ethernet Data | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x81 EP 1 IN | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x02 EP 2 OUT | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Interface Association: | bLength 8 | bDescriptorType 11 | bFirstInterface 2 | bInterfaceCount 2 | bFunctionClass 2 Communications | bFunctionSubClass 2 Abstract (modem) | bFunctionProtocol 1 AT-commands (v.25ter) | iFunction 9 CDC Serial | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 2 | bAlternateSetting 0 | bNumEndpoints 1 | bInterfaceClass 2 Communications | bInterfaceSubClass 2 Abstract (modem) | bInterfaceProtocol 1 AT-commands (v.25ter) | iInterface 7 CDC Abstract Control Model (ACM) | CDC Header: | bcdCDC 1.10 | CDC Call Management: | bmCapabilities 0x00 | bDataInterface 3 | CDC ACM: | bmCapabilities 0x02 | line coding and serial state | CDC Union: | bMasterInterface 2 | bSlaveInterface 3 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x86 EP 6 IN | bmAttributes 3 | Transfer Type Interrupt | Synch Type None | Usage Type Data | wMaxPacketSize 0x000a 1x 10 bytes | bInterval 9 | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 3 | bAlternateSetting 0 | bNumEndpoints 2 | bInterfaceClass 10 CDC Data | bInterfaceSubClass 0 Unused | bInterfaceProtocol 0 | iInterface 8 CDC ACM Data | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x84 EP 4 IN | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x05 EP 5 OUT | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Interface Descriptor: | bLength 9 | bDescriptorType 4 | bInterfaceNumber 4 | bAlternateSetting 0 | bNumEndpoints 2 | bInterfaceClass 8 Mass Storage | bInterfaceSubClass 6 SCSI | bInterfaceProtocol 80 Bulk (Zip) | iInterface 1 Mass Storage | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x81 EP 1 IN | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 0 | Endpoint Descriptor: | bLength 7 | bDescriptorType 5 | bEndpointAddress 0x02 EP 2 OUT | bmAttributes 2 | Transfer Type Bulk | Synch Type None | Usage Type Data | wMaxPacketSize 0x0200 1x 512 bytes | bInterval 1 |Device Qualifier (for other device speed): | bLength 10 | bDescriptorType 6 | bcdUSB 2.10 | bDeviceClass 239 Miscellaneous Device | bDeviceSubClass 2 ? | bDeviceProtocol 1 Interface Association | bMaxPacketSize0 64 | bNumConfigurations 2 |Device Status: 0x0000 | (Bus Powered) So you need a tool to switch between storage, CDC .... >Alan Stern Sebastian -- 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
