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usb: gadget: f_fs: handle control requests in config 0 

Introduces a new FunctionFS descriptor flag named
FUNCTIONFS_CONFIG0_SETUP.

When this flag is enabled, FunctionFS userspace drivers can process
non-standard control requests in configuration 0.

Signed-off-by: Felix Hädicke <felixhaedicke@web.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felix Hädicke 2016-06-22 01:12:09 +02:00 committed by Felipe Balbi
parent 1a00b457a5
commit 4368c28ae7
2 changed files with 4 additions and 2 deletions
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5
drivers/usb/gadget/function/f_fs.c
View File

@ -2247,7 +2247,8 @@ static int __ffs_data_got_descs(struct ffs_data *ffs,
FUNCTIONFS_HAS_MS_OS_DESC |
FUNCTIONFS_VIRTUAL_ADDR |
FUNCTIONFS_EVENTFD |
FUNCTIONFS_ALL_CTRL_RECIP)) {
FUNCTIONFS_ALL_CTRL_RECIP |
FUNCTIONFS_CONFIG0_SETUP)) {
ret = -ENOSYS;
goto error;
}
@ -3142,7 +3143,7 @@ static bool ffs_func_req_match(struct usb_function *f,
{
struct ffs_function *func = ffs_func_from_usb(f);
if (config0)
if (config0 && !(func->ffs->user_flags & FUNCTIONFS_CONFIG0_SETUP))
return false;
switch (creq->bRequestType & USB_RECIP_MASK) {

1
include/uapi/linux/usb/functionfs.h
View File

@ -22,6 +22,7 @@ enum functionfs_flags {
FUNCTIONFS_VIRTUAL_ADDR = 16,
FUNCTIONFS_EVENTFD = 32,
FUNCTIONFS_ALL_CTRL_RECIP = 64,
FUNCTIONFS_CONFIG0_SETUP = 128,
};
/* Descriptor of an non-audio endpoint */