This updates most of the gadget framework to expect SETUP packets use
USB byteorder (matching the annotation in <linux/usb_ch9.h> and usage
in the host side stack):
- definition in <linux/usb_gadget.h>
- gadget drivers: Ethernet/RNDIS, serial/ACM, file_storage, gadgetfs.
- dummy_hcd
It also includes some other similar changes as suggested by "sparse",
which was used to detect byteorder bugs.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This prevents gadget drivers from being selected when no controller has
been selected, by adding an additional boolean and depending on it.
It's mostly to help "allmodconfig".
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch makes the dummy_hcd driver use emulated root-hub interrupts
instead of polling. It's in the spirit of similar changes being made to
the other HCDs.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch adds to the dummy_hcd driver a new routine for keeping track of
all changes in the state of the emulated USB link. The logic is now kept
in one spot instead of spread around, and it's easier to verify and
update the code. The behavior of the port features has been corrected in
a few respects as well (for instance, if the POWER feature is clear then
none of the other features can be set).
Also added is support for the (relatively new) _connect() and
_disconnect() calls of the Gadget API.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch makes the dummy_hcd driver create separate platform devices for
the emulated host controller and emulated device controller. This gives a
more accurate simulation and will permit testing of situations where only
one of the two devices is suspended.
This also changes the name of the host controller platform device to match
the name of the driver. That way the normal platform bus probe mechanism
will handle binding the driver to the device.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch makes some cosmetic changes to dummy_hcd:
Minor alterations of comments and whitespace.
Replace USB_PORT_FEAT_xxx with USB_PORT_STAT_xxx. This is
appropriate as the values are stored in a status variable
and they aren't feature indices. Also it allows the
elimination of a bunch of awkward bit shift operations.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Partial OTG support for dummy_hcd, mostly as a framework for further work.
It emulates the new OTG flags in the host and peripheral frameworks, if
that option is configured. But it's incomplete:
- Resetting the peripheral needs to clear the OTG state bits;
a second enumeration won't work correctly.
- This stops modeling HNP right when roles should switch the first time.
It should probably disconnect, then set the usb_bus.is_b_host and
usb_gadget.is_a_peripheral flags; then it'd enumerate almost normally,
except for the role reversal. Roles could then switch a second time,
back to "normal" (with those flags cleared).
- SRP should be modeled as "resume from port-unpowered", which is
a state that usbcore doesn't yet use.
HNP can be triggered by enabling the OTG whitelist and configuring a
gadget driver that's not in that list; or by configuring Gadget Zero
to identify itself as the HNP test device.
Sent-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
More omap_udc updates:
* OMAP 1710 updates
- new UDC bit for clearing endpoint toggle, affecting CLEAR_HALT
- new OTG bits affecting wakeup
* Fix the bug Vladimir noted, that IN-DMA transfer code path kicks in
for under 1024 bytes (not "up to 1024 bytes")
* Handle transceiver setup more intelligently
- use transceiver whenever one's available; this can be handy
for GPIO based, loopback, or transceiverless configs
- cleanup correctly after the "unrecognized HMC" case
* DMA performance tweaks
- allow burst/pack for memory access
- use 16 bit DMA access most of the time on TIPB
* Add workarounds for some DMA errata (not observed "in the wild"):
- DMA CSAC/CDAC reads returning zero
- RX/TX DMA config registers bit 12 always reads as zero (TI patch)
* More "sparse" warnings removed, notably "changing" the SETUP packet
to return data in USB byteorder (an API change, null effect on OMAP
except for these warnings).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Some cleanup for the the Ethernet part of the Ethernet/RNDIS gadget driver:
- Remove remnants of ancient endpoint init logic; this is simpler, clearer
- Save a smidgeon of space in the object file
- Get rid of some #ifdeffery, mostly by using some newish inlines
- Reset more driver state as part of USB reset
- Remove a needless wrapper around an RNDIS call
- Improve and comment the status interrupt handling:
* RNDIS sometimes needs to queue these transfers (rarely in normal
cases, but reproducibly while Windows was deadlocking its USB stack)
* Mark requests as busy/not
- Enable the SET_NETDEV_DEV() call; sysfs seems to behave sanely now
This is a net shrink of source code.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Some bugfixes and lots of cleanup (net code shrink):
- On reset, force the RNDIS state machine its initial state
- Hook up the RNDIS (outgoing) filters to the CDC mechanism
- Lots of cleanup:
* Eliminate duplicate copy of OID table;
* Unify handlying of the OID "query" response data pointer;
* Reduce code duplication for calculating query response lengths;
* Remove some checks for "can't happen" errors;
* Get rid of debugging #ifdefs by making the debug flag an integer level
Most of the patch, by volume, relates to those query response cleanups.
It incidentally shaves off a few hundred bytes of object code.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch changes the host controller drivers; they no longer need to
register their root hubs because usbcore will take care of it for them.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch changes the HCDs that used the old hub_set_power_budget call,
making them use the new hcd->power_budget field instead.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Various USB patches, mostly for portability:
- Fifo mode 1 didn't work previously (oopsed), so now it's fixed and
(why not) defines even more endpoints for composite devices.
- OMAP 1710 doesn't have an internal transceiver.
- Small PM update: if the USB link is suspended, don't disconnect on
entry to deep sleep.
- Be more correct about handling zero length control reads. OMAP
seems to mis-handle that protocol peculiarity though; best avoided.
- Platform device resources (for UDC and OTG controllers) now use
physical addresses, so /proc/iomem is more consistent.
- Minor cleanups, notably (by volume) for "sparse" NULL warnings.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This patch changes the g_file_storage driver to make the "stall" module
parameter generally available; currently it is available only if the
testing version of the module has been configured. It also fixes a typo
in a comment -- thanks, Pat!
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch simplifies the g_file_storage driver by consolidating a bunch
of min() calculations at a single spot.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1. Establish a simple API for process freezing defined in linux/include/sched.h:
frozen(process) Check for frozen process
freezing(process) Check if a process is being frozen
freeze(process) Tell a process to freeze (go to refrigerator)
thaw_process(process) Restart process
frozen_process(process) Process is frozen now
2. Remove all references to PF_FREEZE and PF_FROZEN from all
kernel sources except sched.h
3. Fix numerous locations where try_to_freeze is manually done by a driver
4. Remove the argument that is no longer necessary from two function calls.
5. Some whitespace cleanup
6. Clear potential race in refrigerator (provides an open window of PF_FREEZE
cleared before setting PF_FROZEN, recalc_sigpending does not check
PF_FROZEN).
This patch does not address the problem of freeze_processes() violating the rule
that a task may only modify its own flags by setting PF_FREEZE. This is not clean
in an SMP environment. freeze(process) is therefore not SMP safe!
Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Updates to the Ethernet/RNDIS gadget driver (mostly for RNDIS):
- Fix brown-paper bag goof with RNDIS packet TX ... the wrong length
field got set, so Windows would ignore data packets it received.
- More consistent handling of CDC output filters (but not yet hooking
things up so RNDIS uses the mechanism).
- Zerocopy RX for RNDIS packets too (saving CPU cycles).
- Use the pre-allocated interrupt/status request and buffer, rather
than allocating and freeing one of each every few seconds (which
could fail).
- Some more "sparse" tweaks, making both dual-speed and single-speed
configurations happier.
- RNDIS speeds are reported in units of 100bps, not bps.
Plus two minor cleanups (whitespace, messaging).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Get rid of a bunch of redundant NULL pointer checks in drivers/usb/*,
there's no need to check a pointer for NULL before calling kfree() on it.
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Index: gregkh-2.6/drivers/usb/class/audio.c
===================================================================
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
David Brownell