Commitc559a35

Robert Baldyga

authored and

Felipe Balbi

committed

usb: gadget: f_fs: add ioctl returning ep descriptor

This patch introduces ioctl named FUNCTIONFS_ENDPOINT_DESC, whichreturns endpoint descriptor to userspace. It works only if functionis active.Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>Acked-by: Michal Nazarewicz <mina86@mina86.com>Signed-off-by: Felipe Balbi <balbi@ti.com>

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2 files changed

+29

-0

lines changed

drivers/usb/gadget/function
- f_fs.c
include/uapi/linux/usb
- functionfs.h

2 files changed

+29

-0

lines changed

`‎drivers/usb/gadget/function/f_fs.c‎`

Lines changed: 23 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1026,6 +1026,29 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,`
`1026`	`1026`	`caseFUNCTIONFS_ENDPOINT_REVMAP:`
`1027`	`1027`	`ret=epfile->ep->num;`
`1028`	`1028`	`break;`
	`1029`	`+caseFUNCTIONFS_ENDPOINT_DESC:`
	`1030`	`+{`
	`1031`	`+intdesc_idx;`
	`1032`	`+structusb_endpoint_descriptor*desc;`
	`1033`	`+`
	`1034`	`+switch (epfile->ffs->gadget->speed) {`
	`1035`	`+caseUSB_SPEED_SUPER:`
	`1036`	`+desc_idx=2;`
	`1037`	`+break;`
	`1038`	`+caseUSB_SPEED_HIGH:`
	`1039`	`+desc_idx=1;`
	`1040`	`+break;`
	`1041`	`+default:`
	`1042`	`+desc_idx=0;`
	`1043`	`+}`
	`1044`	`+desc=epfile->ep->descs[desc_idx];`
	`1045`	`+`
	`1046`	`+spin_unlock_irq(&epfile->ffs->eps_lock);`
	`1047`	`+ret=copy_to_user((void)value,desc,sizeof(desc));`
	`1048`	`+if (ret)`
	`1049`	`+ret=-EFAULT;`
	`1050`	`+returnret;`
	`1051`	`+}`
`1029`	`1052`	`default:`
`1030`	`1053`	`ret=-ENOTTY;`
`1031`	`1054`	`}`

`‎include/uapi/linux/usb/functionfs.h‎`

Lines changed: 6 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -275,6 +275,12 @@ struct usb_functionfs_event {`
`275`	`275`	`*/`
`276`	`276`	`#defineFUNCTIONFS_ENDPOINT_REVMAP_IO('g', 129)`
`277`	`277`
	`278`	`+/*`
	`279`	`+ * Returns endpoint descriptor. If function is not active returns -ENODEV.`
	`280`	`+ */`
	`281`	`+#defineFUNCTIONFS_ENDPOINT_DESC_IOR('g', 130, \`
	`282`	`+ struct usb_endpoint_descriptor)`
	`283`	`+`
`278`	`284`
`279`	`285`
`280`	`286`	`#endif/* _UAPI__LINUX_FUNCTIONFS_H__ */`

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Commitc559a35

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2 files changed

2 files changed

`‎drivers/usb/gadget/function/f_fs.c‎`

`‎include/uapi/linux/usb/functionfs.h‎`

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