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Felipe Balbi 3b5a43dad0 usb: add helper to extract bits 12:11 of wMaxPacketSize ... commit 541b6fe630 upstream. According to USB Specification 2.0 table 9-4, wMaxPacketSize is a bitfield. Endpoint's maxpacket is laid out in bits 10:0. For high-speed, high-bandwidth isochronous endpoints, bits 12:11 contain a multiplier to tell us how many transactions we want to try per uframe. This means that if we want an isochronous endpoint to issue 3 transfers of 1024 bytes per uframe, wMaxPacketSize should contain the value: 1024 | (2 << 11) or 5120 (0x1400). In order to make Host and Peripheral controller drivers' life easier, we're adding a helper which returns bits 12:11. Note that no care is made WRT to checking endpoint type and gadget's speed. That's left for drivers to handle. Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>		History 2017-03-16 02:26:17 +00:00
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audio.h	ALSA: usb: Fix Processing Unit Descriptor parsers	2013-02-21 13:55:12 +01:00
cdc-wdm.h	USB: cdc-wdm: properly include types.h	2014-05-27 16:32:10 -07:00
cdc.h	USB: cdc: add MBIM extended functional descriptor structure	2014-03-20 16:57:34 -04:00
ch9.h	usb: add helper to extract bits 12:11 of wMaxPacketSize	2017-03-16 02:26:17 +00:00
ch11.h	USB: move the definition of USB_MAXCHILDREN	2013-07-16 15:33:02 -07:00
functionfs.h	usb: gadget: f_fs: resurect usb_functionfs_descs_head structure	2014-06-27 10:41:29 -05:00
g_printer.h	UAPI: (Scripted) Disintegrate include/linux/usb	2012-10-09 09:49:07 +01:00
gadgetfs.h	UAPI: (Scripted) Disintegrate include/linux/usb	2012-10-09 09:49:07 +01:00
Kbuild	usb: cdc-wdm: export cdc-wdm uapi header	2014-05-27 16:29:39 -07:00
midi.h	UAPI: (Scripted) Disintegrate include/linux/usb	2012-10-09 09:49:07 +01:00
tmc.h	UAPI: (Scripted) Disintegrate include/linux/usb	2012-10-09 09:49:07 +01:00
video.h	UAPI: (Scripted) Disintegrate include/linux/usb	2012-10-09 09:49:07 +01:00