Here I present the conversion of everthing that is required to provide the equivalent of g_cdc.ko with configfs.
A branch will be available here (from 15th May 2013, afternoon UTC): git://git.infradead.org/users/kmpark/linux-samsung usb-gadget-configfs v1..v2: - fixed a bug resulting from the delayed registration of a network interface (should be registered only once) BACKWARD COMPATIBILITY ====================== Please note that the old g_cdc.ko is still available and works. USING THE NEW "GADGET" ====================== Please refer to this post: http://www.spinics.net/lists/linux-usb/msg76388.html for general information from Sebastian on how to use configfs-based gadgets (*). Here is the description specific to using g_cdc.ko equivalent. The old g_cdc.ko provides two functions: - acm - ecm which can be used simultaneously. The acm function usage is described in (*). For ecm the old g_cdc.ko offered three parameters: qmult - queue length multiplier for high/super -speed devices dev_addr - device's MAC address host_addr - host's MAC address With configfs the procedure is as follows, compared to the information mentioned above (*): instead of mkdir functions/acm.ttyS1 do mkdir functions/ecm.<instance name> e.g. mkdir functions/ecm.usb0 In functions/ecm.<instance name> there will be the following attribute files: qmult dev_addr host_addr ifname and after creating the functions/ecm.<instance name> they contain default values: qmult is 5, dev_addr and host_addr are randomly selected. Except for ifname they can be written to until the function is linked to a configuration. The ifname is read-only and contains the name of the interface which was assigned by the net core, e. g. usb0. The rest of the procedure (*) remains the same. After unbinding the gadget with echo "" > UDC the symbolic links in the configuration directory can be removed, the strings/* subdirectories in the configuration directory can be removed, the strings/* subdirectories at the gadget level can be removed and the configs/* subdirectories can be removed. The functions/* subdirectories can be removed. After that the gadget directory can be removed. After that the respective modules can be unloaded. TESTING THE FUNCTIONS ==================== acm) On host: cat > /dev/ttyACM<X> On target: cat /dev/ttyGS<Y> then the other way round On target: cat > /dev/ttyGS<Y> On host: cat /dev/ttyACM<X> ecm) On the device: ping <host's IP> On the host: ping <device's IP> Andrzej Pietrasiewicz (5): usb/gadget: add helpers for configfs support for USB Ethernet usb/gadget: f_ecm: convert to new function interface with backward compatibility usb/gadget: cdc2: convert to new interface of f_ecm usb/gadget: f_ecm: use usb_gstrings_attach usb/gadget: f_ecm: add configfs support drivers/usb/gadget/Kconfig | 4 + drivers/usb/gadget/Makefile | 2 + drivers/usb/gadget/cdc2.c | 83 +++++++++------ drivers/usb/gadget/ether.c | 1 + drivers/usb/gadget/f_ecm.c | 193 ++++++++++++++++++++++++++++++--- drivers/usb/gadget/f_ncm.c | 139 ++---------------------- drivers/usb/gadget/g_ffs.c | 1 + drivers/usb/gadget/multi.c | 1 + drivers/usb/gadget/nokia.c | 3 +- drivers/usb/gadget/u_ecm.h | 36 ++++++ drivers/usb/gadget/u_ether_configfs.h | 164 ++++++++++++++++++++++++++++ 11 files changed, 451 insertions(+), 176 deletions(-) create mode 100644 drivers/usb/gadget/u_ecm.h create mode 100644 drivers/usb/gadget/u_ether_configfs.h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
