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1b9ba00017
linux/drivers/usb/gadget
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Roger Quadros 1b9ba00017 usb: gadget: composite: Allow function drivers to pause control transfers 
Some USB function drivers (e.g. f_mass_storage.c) need to delay or defer the
data/status stages of standard control requests like SET_CONFIGURATION or
SET_INTERFACE till they are done with their bookkeeping and are actually ready
for accepting new commands to their interface.

They can now achieve this functionality by returning USB_GADGET_DELAYED_STATUS
in their setup handlers (e.g. set_alt()). The composite framework will then
defer completion of the control transfer by not completing the data/status stages.

This ensures that the host does not send new packets to the interface till the
function driver is ready to take them.

When the function driver that requested for USB_GADGET_DELAYED_STATUS is done
with its bookkeeping, it should signal the composite framework to continue with
the data/status stages of the control transfer. It can do so by invoking
the new API usb_composite_setup_continue(). This is where the control transfer's
data/status stages are completed and host can initiate new transfers.

The DELAYED_STATUS mechanism is currently only supported if the expected data phase
is 0 bytes (i.e. w_length == 0). Since SET_CONFIGURATION and SET_INTERFACE are the
only cases that will use this mechanism, this is not a limitation.

Signed-off-by: Roger Quadros <roger.quadros@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-05-10 14:14:57 -07:00
..
amd5536udc.c Fix common misspellings 2011-03-31 11:26:23 -03:00
amd5536udc.h Fix common misspellings 2011-03-31 11:26:23 -03:00
at91_udc.c Fix common misspellings 2011-03-31 11:26:23 -03:00
at91_udc.h ARM: 6209/3: at91_udc: Add vbus polarity and polling mode 2010-07-18 20:39:10 +01:00
atmel_usba_udc.c USB: atmel_usba_udc: fix freeing irq in usba_udc_remove() 2010-12-16 13:36:12 -08:00
atmel_usba_udc.h USB: atmel uaba: Adding invert vbus_pin 2010-03-02 14:54:57 -08:00
audio.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
cdc2.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
ci13xxx_msm.c USB: gadget: Implement runtime PM for MSM bus glue driver 2010-12-10 14:23:34 -08:00
ci13xxx_pci.c USB: gadget: Introduce ci13xxx_udc_driver struct 2010-12-10 14:23:33 -08:00
ci13xxx_udc.c USB: OTG: msm: Implement charger detection 2011-05-06 18:27:48 -07:00
ci13xxx_udc.h USB: gadget: Add test mode support for ci13xxx_udc 2011-02-25 11:33:57 -08:00
composite.c usb: gadget: composite: Allow function drivers to pause control transfers 2011-05-10 14:14:57 -07:00
config.c USB: gadget: __init and __exit tags removed 2010-05-20 13:21:43 -07:00
dbgp.c USB: dbpg gadget: dont mask out direction bit 2011-04-29 17:24:30 -07:00
dummy_hcd.c usb/dummy_hcd: don't probe for udc if hcd failed 2011-04-29 17:24:36 -07:00
epautoconf.c USB: Gadget: Initialize wMaxPacketSize if not already set 2011-02-04 11:42:52 -08:00
ether.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
f_acm.c USB: Change acm_iad_descriptor bFunctionProtocol to USB_CDC_ACM_PROTO_AT_V25TER 2010-10-22 10:21:35 -07:00
f_audio.c usb/gadget: don't leak hs_descriptors 2011-04-13 15:44:03 -07:00
f_ecm.c USB: gadget: __init and __exit tags removed 2010-05-20 13:21:43 -07:00
f_eem.c usb: gadget: eem: fix echo command processing 2011-04-13 15:44:01 -07:00
f_fs.c USB: gadget: f_fs: even zero-length packets require a buffer 2011-02-04 11:57:22 -08:00
f_hid.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
f_loopback.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
f_mass_storage.c Revert "usb: usb_storage: do not align length of request for CBW to maxp size" 2011-04-14 13:42:46 -07:00
f_ncm.c Fix common misspellings 2011-03-31 11:26:23 -03:00
f_obex.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
f_phonet.c f_phonet: avoid pskb_pull(), fix OOPS with CONFIG_HIGHMEM 2011-02-28 12:36:39 -08:00
f_rndis.c USB: gadget: __init and __exit tags removed 2010-05-20 13:21:43 -07:00
f_serial.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
f_sourcesink.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
f_subset.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
f_uvc.c V4L/DVB: uvc: Move constants and structures definitions to linux/usb/video.h 2010-08-02 16:43:15 -03:00
f_uvc.h V4L/DVB: uvc: Move constants and structures definitions to linux/usb/video.h 2010-08-02 16:43:15 -03:00
file_storage.c Revert "usb: usb_storage: do not align length of request for CBW to maxp size" 2011-04-14 13:42:46 -07:00
fsl_mxc_udc.c usb: gadget/fsl_mxc_udc: Detect the CPU type in run-time 2011-02-04 11:42:52 -08:00
fsl_qe_udc.c USB: fsl_qe_udc: send ZLP when zero flag and length % maxpacket == 0 2011-04-13 15:57:19 -07:00
fsl_qe_udc.h usb: fix a typo in a comment 2011-04-13 16:41:00 -07:00
fsl_udc_core.c fsl/usb: Unused endpoint failure for USB gadget 2011-05-06 18:19:39 -07:00
fsl_usb2_udc.h USB: extend ehci-fsl and fsl_udc_core driver for OTG operation 2011-05-02 16:59:38 -07:00
fusb300_udc.c usb: fusb300_udc: add more "ep%d" names 2011-02-17 10:47:55 -08:00
fusb300_udc.h usb: udc: add Faraday fusb300 driver 2011-01-22 19:45:36 -08:00
g_ffs.c usb: gadget: g_fs: Fix compilation warning 2010-11-17 13:24:46 -08:00
g_zero.h
gadget_chips.h usb: renesas_usbhs: Add Renesas USBHS Gadget 2011-04-13 16:07:07 -07:00
gmidi.c Fix common misspellings 2011-03-31 11:26:23 -03:00
goku_udc.c usb: gadget: goku_udc: Fix error path 2010-10-22 10:22:04 -07:00
goku_udc.h usb: gadget: goku_udc: add registered flag bit, fixing build 2010-11-11 06:57:24 -08:00
hid.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
imx_udc.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-01-13 10:05:56 -08:00
imx_udc.h usb: gadget/imx-udc: remove usage of deprecated symbol USBD_INT0 2010-11-11 05:51:15 -08:00
inode.c USB: usb-gadget: unlock data->lock mutex on error path in ep_read() 2011-04-13 15:43:59 -07:00
Kconfig usb: renesas_usbhs: Add Renesas USBHS Gadget 2011-04-13 16:07:07 -07:00
langwell_udc.c Fix common misspellings 2011-03-31 11:26:23 -03:00
langwell_udc.h USB: langwell: USB Client driver memory handling 2010-10-22 10:21:19 -07:00
m66592-udc.c usb: m66592-udc: Fixed bufnum of Bulk 2011-02-25 11:33:00 -08:00
m66592-udc.h usb: gadget: m66592-udc pio to mmio accessor conversion. 2010-06-02 16:26:13 +09:00
Makefile Merge branch 'remove' of master.kernel.org:/home/rmk/linux-2.6-arm 2011-03-16 19:05:40 -07:00
mass_storage.c USB: gadget: f_mass_storage: code style clean ups 2010-11-11 05:58:49 -08:00
multi.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
mv_udc_core.c Fix common misspellings 2011-03-31 11:26:23 -03:00
mv_udc_phy.c USB: pxa: Add USB client support for Marvell PXA9xx/PXA168 chips 2010-11-30 16:51:21 -08:00
mv_udc.h USB: pxa: Add USB client support for Marvell PXA9xx/PXA168 chips 2010-11-30 16:51:21 -08:00
ncm.c usb: gadget: g_ncm added 2010-12-10 14:29:43 -08:00
ndis.h
net2280.c Fix common misspellings 2011-03-31 11:26:23 -03:00
net2280.h
nokia.c Fix common misspellings 2011-03-31 11:26:23 -03:00
omap_udc.c Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 2010-10-25 13:46:56 -07:00
omap_udc.h
pch_udc.c usb: pch_udc: unlock on allocation failure 2011-04-13 15:44:05 -07:00
printer.c USB: g_printer required set interface request 2011-04-29 17:24:31 -07:00
pxa25x_udc.c ARM: pxa25x_udc: stop handling gpio-vbus internally 2011-03-16 16:33:34 +08:00
pxa25x_udc.h USB: gadget: pxa25x: basic transceiver support 2009-09-23 06:46:23 -07:00
pxa27x_udc.c Fix common misspellings 2011-03-31 11:26:23 -03:00
pxa27x_udc.h USB: pxa27x_udc: use four bits to store endpoint addresses 2010-05-20 13:21:36 -07:00
r8a66597-udc.c usb: r8a66597-udc: fix spinlock usage 2011-04-13 15:44:00 -07:00
r8a66597-udc.h USB: r8a66597-udc: Initialize uninitialized variable, fix compile warning 2010-10-22 10:21:34 -07:00
rndis.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
rndis.h USB: rndis: section mismatch fix 2010-09-03 17:33:40 -07:00
s3c2410_udc.c USB: s3c2410_udc: Add common implementation for GPIO controlled pullups 2011-03-07 12:23:22 -08:00
s3c2410_udc.h
s3c-hsotg.c USB: s3c-hsotg: Add copyright string 2011-05-02 17:00:27 -07:00
serial.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
storage_common.c usb: gadget: storage_common: use kstrto*() [bug fix] 2011-04-29 17:24:36 -07:00
u_audio.c usb: g_audio: Fix crash at driver removal 2010-12-03 12:05:35 -08:00
u_audio.h USB: audio gadget: free alsa devices when unloading 2009-12-23 11:34:20 -08:00
u_ether.c usb-gadget: fix warning in ethernet 2011-03-02 19:52:29 -05:00
u_ether.h usb: gadget: f_ncm.c added 2010-12-10 14:29:43 -08:00
u_phonet.h
u_serial.c usb: subtle increased memory usage in u_serial 2010-11-11 07:03:48 -08:00
u_serial.h
usbstring.c
uvc_queue.c V4L/DVB: uvc: Fix multiple symbols definitions with UVC gadget and host drivers 2010-07-11 17:45:10 -03:00
uvc_queue.h V4L/DVB: uvc: Fix multiple symbols definitions with UVC gadget and host drivers 2010-07-11 17:45:10 -03:00
uvc_v4l2.c USB: uvc_v4l2: cleanup test for end of loop 2010-08-23 20:50:14 -07:00
uvc_video.c V4L/DVB: uvc: Fix multiple symbols definitions with UVC gadget and host drivers 2010-07-11 17:45:10 -03:00
uvc.h V4L/DVB: uvc: Move constants and structures definitions to linux/usb/video.h 2010-08-02 16:43:15 -03:00
webcam.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
zero.c usb gadget: don't save bind callback in struct usb_composite_driver 2010-10-22 10:21:25 -07:00