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16f08a08d8
linux/drivers/usb/gadget
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Fabian Godehardt 16f08a08d8 USB: s3c2410_udc: Add handling for S3C244X dual-packet mode 
This is a patch that seems to make the USB hangs on the S3C244X go away.
At least a good amount of ping torture didn't make them come back so far.

The issue is that, if there are several back-to-back packets, sometimes no
interrupt is generated for one of them. This seems to be caused by the
mysterious dual packet mode, which the USB hardware enters automatically
if the endpoint size is half that of the FIFO. (On the 244X, this is the
normal situation for bulk data endpoints.)

There is also a timing factor in this. It seems that what happens is that
the USB hardware automatically sends an acknowledgement if there is only one
packet in the FIFO (the FIFO has space for two). If another packet arrives
before the host has retrieved and acknowledged the previous one, no interrupt
is generated for that second one.

However, there may be an indication. There is one undocumented bit (none
of the 244x manuals document it), OUT_CRS1_REG[1], that seems to be set
suspiciously often when this condition occurs. There is also
CLR_DATA_TOGGLE, OUT_CRS1_REG[7], which may have a function related to
this. (The Samsung manual is rather terse on that, as usual.)

This needs to be examined further. For now, the patch seems to do the
trick.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-02-17 10:47:55 -08:00
..
amd5536udc.c USB: gadget: amd5536udc.c: delete double assignment 2010-11-11 05:51:15 -08:00
amd5536udc.h
at91_udc.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
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: gadget: Fix endpoint representation in ci13xxx_udc 2011-01-22 18:49:24 -08:00
ci13xxx_udc.h USB: gadget: Fix endpoint representation in ci13xxx_udc 2011-01-22 18:49:24 -08:00
composite.c USB: Gadget: Reorder driver name assignment 2011-02-17 10:41:46 -08:00
config.c USB: gadget: __init and __exit tags removed 2010-05-20 13:21:43 -07:00
dbgp.c usb gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -07:00
dummy_hcd.c usb: dummy_hcd code simplification 2010-11-11 06:19:35 -08:00
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 drivers/usb: Remove unnecessary return's from void functions 2010-08-10 14:25:42 +02:00
f_ecm.c USB: gadget: __init and __exit tags removed 2010-05-20 13:21:43 -07:00
f_eem.c USB: gadget eth: Fix calculate CRC32 in EEM 2010-06-30 08:16:06 -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 USB, Mass Storage, composite, gadget: Fix build failure and memset of a struct 2011-02-04 12:38:14 -08:00
f_ncm.c usb: gadget: f_ncm.c added 2010-12-10 14:29:43 -08:00
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 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_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 USB: gadget: file_storage: put_device() in error recovery 2010-11-11 05:58:48 -08:00
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 gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -07:00
fsl_qe_udc.h powerpc/qe&cpm: Implement static inline stubs for non-QE/CPM builds 2009-11-11 21:43:20 -06:00
fsl_udc_core.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
fsl_usb2_udc.h
fusb300_udc.c usb: udc: add Faraday fusb300 driver 2011-01-22 19:45:36 -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 Merge branch 'musb-hw' of git://gitorious.org/usb/usb into musb 2010-12-15 09:29:38 -08:00
gmidi.c usb gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -07:00
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 convert get_sb_single() users 2010-10-29 04:16:28 -04:00
Kconfig Merge 2.6.38-rc5 into usb-next 2011-02-17 09:56:55 -08:00
langwell_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
langwell_udc.h USB: langwell: USB Client driver memory handling 2010-10-22 10:21:19 -07:00
lh7a40x_udc.c usb gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -07:00
lh7a40x_udc.h
m66592-udc.c usb gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -07:00
m66592-udc.h usb: gadget: m66592-udc pio to mmio accessor conversion. 2010-06-02 16:26:13 +09:00
Makefile usb: udc: add Faraday fusb300 driver 2011-01-22 19:45:36 -08:00
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 USB: pxa: Add USB client support for Marvell PXA9xx/PXA168 chips 2010-11-30 16:51:21 -08:00
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 usb gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -07:00
net2280.h
nokia.c usb gadget: don't save bind callback in struct usb_configuration 2010-10-22 10:21:26 -07:00
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: Fixed issue which does not work with g_ether 2011-02-17 10:47:54 -08:00
printer.c USB: g_printer: fix bug in module parameter definitions 2011-01-22 18:38:58 -08:00
pxa25x_udc.c usb gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -07:00
pxa25x_udc.h USB: gadget: pxa25x: basic transceiver support 2009-09-23 06:46:23 -07:00
pxa27x_udc.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
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: Fixed bufnum of Bulk 2011-02-03 16:45:50 -08:00
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 handling for S3C244X dual-packet mode 2011-02-17 10:47:55 -08:00
s3c2410_udc.h
s3c-hsotg.c usb gadget: don't save bind callback in struct usb_gadget_driver 2010-10-22 10:21:25 -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 block: check bdev_read_only() from blkdev_get() 2010-11-13 11:55:17 +01:00
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 Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2011-01-07 16:58:04 -08:00
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