This series aims at integrating configfs into gadget zero, the way it has been done for acm, ncm, ecm, eem, ecm subset, rndis, obex, phonet, mass_storage and FunctionFS. It contains everything that is required to provide the equivalent of g_zero.ko with configfs. v1..v2: - fixes after Michal's review, thank you, Michal! - simplified redirecting the setup request Rebased onto Felipe's master. BACKWARD COMPATIBILITY ====================== Please note that the old g_zero.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 (*). With configfs the procedure is as follows, compared to the information mentioned above (*): instead of mkdir functions/acm.ttyS1 do mkdir functions/Loopback.0 mkdir functions/SourceSink.0 In the Loopback.0 directory there will be two attributes: qlen - depth of loopback queue bulk_buflen - buffer length In the SourceSink.0 directory there will be six attributes: pattern - 0 (all zeros), 1 (mod63), 2 (none) isoc_interval - 1..16 isoc_maxpacket - 0 - 1023 (fs), 0 - 1024 (hs/ss) isoc_mult - 0..2 (hs/ss only) isoc_maxburst - 0..15 (ss only) bulk_buflen - buffer length An example gadget with Loopback and SourceSink functions: $ modprobe libcomposite $ mount none cfg -t configfs $ mkdir cfg/usb_gadget/g1 $ cd cfg/usb_gadget/g1 $ mkdir configs/c.1 $ mkdir configs/c.2 $ mkdir functions/Loopback.0 $ mkdir functions/SourceSink.0 $ mkdir strings/0x409 $ mkdir configs/c.1/strings/0x409 $ mkdir configs/c.2/strings/0x409 $ echo 0x2d01 > idProduct $ echo 0x04e8 > idVendor $ echo my-serial-num > strings/0x409/serialnumber $ echo my-manufacturer > strings/0x409/manufacturer $ echo "Test gadget" > strings/0x409/product $ echo "Conf 1" > configs/c.1/strings/0x409/configuration $ echo "Conf 2" > configs/c.2/strings/0x409/configuration $ echo 120 > configs/c.1/MaxPower $ ln -s functions/Loopback.0 configs/c.1 $ ln -s functions/SourceSink.0 configs/c.2 $ echo s3c-hsotg > cfg/usb_gadget/g1/UDC 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. Daemons need to be closed and then the respective modules can be unloaded. TESTING THE FUNCTIONS (actually there is only one) ===================== loopback, souresink) device: run the gadget host: test-usb http://www.linux-usb.org/usbtest/testusb.c The results should be the same as with the g_zero.ko. Andrzej Pietrasiewicz (4): usb/gadget: composite: redirect setup requests usb/gadget: factor out alloc_ep_req usb/gadget: f_loopback: add configfs support usb/gadget: f_sourcesink: add configfs support .../ABI/testing/configfs-usb-gadget-loopback | 8 + .../ABI/testing/configfs-usb-gadget-sourcesink | 12 + drivers/usb/gadget/Kconfig | 13 + drivers/usb/gadget/Makefile | 2 +- drivers/usb/gadget/composite.c | 16 +- drivers/usb/gadget/f_hid.c | 18 +- drivers/usb/gadget/f_loopback.c | 140 ++++++++- drivers/usb/gadget/f_midi.c | 22 +- drivers/usb/gadget/f_sourcesink.c | 341 ++++++++++++++++++- drivers/usb/gadget/g_zero.h | 24 ++- drivers/usb/gadget/u_f.c | 32 ++ drivers/usb/gadget/u_f.h | 26 ++ drivers/usb/gadget/zero.c | 8 +- 13 files changed, 608 insertions(+), 54 deletions(-) create mode 100644 Documentation/ABI/testing/configfs-usb-gadget-loopback create mode 100644 Documentation/ABI/testing/configfs-usb-gadget-sourcesink create mode 100644 drivers/usb/gadget/u_f.c create mode 100644 drivers/usb/gadget/u_f.h -- 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
