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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-24 22:57:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-24 22:57:49 +0100 |
| commit | 1c41a9570a02cec80be5fb4f7f9cf206220d84a5 (patch) | |
| tree | 21eeee43b0cb88415ea809bfab3f2b432fd5ac45 /Documentation/usb | |
| parent | Merge 4.0-rc5 into usb-next (diff) | |
| parent | usb: musb: Fix fifo reads for dm816x with musb_dsps (diff) | |
| download | linux-1c41a9570a02cec80be5fb4f7f9cf206220d84a5.tar.xz linux-1c41a9570a02cec80be5fb4f7f9cf206220d84a5.zip | |
Merge tag 'usb-for-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
Felipe writes:
usb: patches for v4.1 merge window
As usual, a big pile of commits. This time a total
of 111 non-merge commits.
Other than the usual set of cleanups and non-critical
fixes, we have some interesting work for AM335x's MUSB
babble recovery. Now that takes a lot less time and we
don't have to Reset MUSB all the time.
The printer gadget has been converted to configfs interface
and the atmel udc has learned suspend/resume with wakeup.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'Documentation/usb')
| -rw-r--r-- | Documentation/usb/gadget-testing.txt | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/usb/gadget-testing.txt b/Documentation/usb/gadget-testing.txt index 076ac7ba7f93..f45b2bf4b41d 100644 --- a/Documentation/usb/gadget-testing.txt +++ b/Documentation/usb/gadget-testing.txt @@ -19,6 +19,7 @@ provided by gadgets. 16. UAC1 function 17. UAC2 function 18. UVC function +19. PRINTER function 1. ACM function @@ -726,3 +727,49 @@ with these patches: http://www.spinics.net/lists/linux-usb/msg99220.html host: luvcview -f yuv + +19. PRINTER function +==================== + +The function is provided by usb_f_printer.ko module. + +Function-specific configfs interface +------------------------------------ + +The function name to use when creating the function directory is "printer". +The printer function provides these attributes in its function directory: + + pnp_string - Data to be passed to the host in pnp string + q_len - Number of requests per endpoint + +Testing the PRINTER function +---------------------------- + +The most basic testing: + +device: run the gadget +# ls -l /devices/virtual/usb_printer_gadget/ + +should show g_printer<number>. + +If udev is active, then /dev/g_printer<number> should appear automatically. + +host: + +If udev is active, then e.g. /dev/usb/lp0 should appear. + +host->device transmission: + +device: +# cat /dev/g_printer<number> +host: +# cat > /dev/usb/lp0 + +device->host transmission: + +# cat > /dev/g_printer<number> +host: +# cat /dev/usb/lp0 + +More advanced testing can be done with the prn_example +described in Documentation/usb/gadget-printer.txt. |