After NACKing a read operation, a raising SCL should not trigger a new
read from the slave.  Introduce a new state which just waits for a stop
or start condition after NACK.
Signed-off-by: NMarcus Comstedt <marcus@mc.pp.se>
Signed-off-by: NAndrzej Zaborowski <andrew.zaborowski@intel.com>

Simplify cpu-exec.c by refactoring.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

There is little in common with user and softmmu versions of cpu_resume_signal(),
split them.

Fix coding style for the user emulator part.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch finally merges the EHCI host adapter aka USB 2.0 support.

Based on the ehci bits collected @ git://git.kiszka.org/qemu.git ehci

EHCI has a long out-of-tree history.  Project was started by Mark
Burkley, with contributions by Niels de Vos.  David S. Ahern continued
working on it.  Kevin Wolf, Jan Kiszka and Vincent Palatin contributed
bugfixes.

/me (Gerd Hoffmann) picked it up where it left off, prepared the code
for merge, fixed a few bugs and added basic user docs.

Cc: David S. Ahern <daahern@cisco.com>
Cc: Jan Kiszka <jan.kiszka@web.de>
Cc: Kevin Wolf <mail@kevin-wolf.de>
Cc: Vincent Palatin <vincent.palatin_qemu@m4x.org>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Remove the cancel callback from the USBPacket struct, move it over
to USBDeviceInfo.  Zap usb_defer_packet() which is obsolete now.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Keep track of the device which owns the usb packet for async processing.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add a usb_handle_packet function, put it into use everywhere.
Right now it just calls dev->info->handle_packet(), that will
change in future patches though.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

usb_msd_copy_data() may cause a recursive call to
usb_msd_command_complete() which in turn may complete
the packet, setting s->packet to NULL in case it does.
Recheck s->packet before calling usb_packet_complete()
to fix the double call.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Calculate the max packet size correctly.  Only bits 0..11 specify the size,
bits 11+12 specify the number of (highspeed) microframes the endpoint wants
to use.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add support for splitting large transfers into multiple smaller ones.
This is needed for the upcoming EHCI emulation which allows guests
to submit requests up to 20k in size.  The linux kernel allows 16k
max size though.

Based on a patch from David Ahern, see
http://www.mail-archive.com/qemu-devel@nongnu.org/msg30337.html

Cc: David Ahern <daahern@cisco.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Lookup async urbs which are to be canceled using the linked list
instead of the direct opaque pointer.  There are two reasons we
are doing that:  First, to avoid the opaque poiner to the callback,
which is needed for upcoming cleanups.  Second, because we might
need multiple urbs per request for highspeed support, so a single
opaque pointer doesn't cut it any more anyway.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds code to track all async urbs in a linked list,
so we can find them without having to pass around a opaque
pointer to them.  Prerequisite for the cleanups.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch adds a hostport property which allows to specify the host usb
devices to pass through by bus number and physical port.  This means you
can basically hand over one (or more) of the usb plugs on your host to
the guest and whatever device is plugged in there will show up in the
guest.

Usage:

  -device usb-host,hostbus=1,hostport=1

You can figure the port numbers by plugging in some usb device, then
find it in "info usbhost" and pick bus and port specified there.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

The device path isn't just a number.  It specifies the physical port
the device is connected to and in case the device is connected via
usb hub you'll have two numbers there, like this: "5.1".  The first
specifies the root port where the hub is plugged into, the second
specifies the port number of the hub where the device is plugged in.
With multiple hubs chained the string can become longer.

This patch renames devpath to port and makes it a string.   It also
adapts the sysfs parsing code accordingly.  The parser code is also more
strict now and skips the root hubs (which can't be assigned anyway).

The "info usbhost" monitor command now prints bus number, (os-assigned)
device address and physical port for each device.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Make the linux usb host passthrough code use the usb_generic_handle_packet()
function, rather then the curent DYI code. This removes 200 lines of almost
identical code.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>

This allows using the generic usb_generic_handle_packet function from
device code which does ASYNC control requests (such as the linux host
pass through code).
Signed-off-by: NHans de Goede <hdegoede@redhat.com>

UHCI host controller status register indicates error and
an interrupt is triggered on BABBLE and STALL errors.
Signed-off-by: NJan Vesely <jano.vesely@gmail.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This is used for some devices that have multiple interfaces that form a logic
device. An example is Video Class, which has a Control interface and a
Streaming interface. There can be additional interfaces on the same (physical)
devices (e.g. a microphone), and Interface Association Descriptor handles this
case.
Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

All callers have been updated.
Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Previously we relied on the .bNumInterfaces, but that won't always be
accurate after the introduction of grouped interfaces.
Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

The --disable-slirp option was undocumented; add it to configure's
--help output.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Remove a preprocessor #define which is never used.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

If the input to a Neon float comparison is a quiet NaN, the ARM ARM
specifies that we should raise InvalidOp if the comparison is GE or GT
but not for EQ. (Signaling NaNs raise InvalidOp regardless). This means
only EQ should use the _quiet version of the comparison function.

We implement this by cleaning up the comparison helpers to call the
appopriate versions of the softfloat simple comparison functions
(float32_le and friends) rather than the generic float32_compare functions.
This makes them simple enough that they are clearer opencoded rather
than macroised.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

The Neon versions of int-float conversions must use the "standard FPSCR"
rather than the default FPSCR. Implement this by having the helper
functions take a pointer to the appropriate float_status value rather
than simply taking a pointer to the entire CPUState, and making
translate.c pass a pointer to vfp.fp_status or vfp.standard_fp_status
appropriately for whether the instruction being translated is Neon
or VFP.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

On ARM the architecture mandates that when an output denormal is flushed to
zero we must set the FPSCR UFC (underflow) bit, so map softfloat's
float_flag_output_denormal accordingly.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Add a new float_flag_output_denormal which is set when the result
of a floating point operation would be denormal but is flushed to
zero because we are in flush_to_zero mode. This is necessary because
some architectures signal this condition as an underflow and others
signal it as an inexact result.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

The helpers for VRECPE.F32, VSQRTE.F32, VRECPS and VRSQRTS handle denormals
as special cases, so we must set the InputDenormal exception flag ourselves.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

The functions which do the core estimation algorithms for the VRSQRTE
and VRECPE instructions should not set floating point exception flags,
so use a local fp status for doing these calculations.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

If an op with dead outputs is not removed, because it has side effects
or has multiple output and only one dead, mark the registers as dead
instead of saving them. This avoid a few register spills on TCG targets
with low register count, especially with div2 and mul2 ops, or when a
qemu_ld* result is not used (prefetch emulation for example).
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

If an op is not removed and has dead output arguments, mark it
in op_dead_args similarly to what is done for input arguments.
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Allow all args to be dead by replacing the input specific op_dead_iargs
variable by op_dead_args. Note this is a purely mechanical change.
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

* 'trivial-patches' of git://repo.or.cz/qemu/stefanha:
  Fix typos in comments (chek -> check)
  hw/sd.c: Don't complain about SDIO commands CMD52/CMD53
  hw/realview.c: Remove duplicate #include line
  piix_pci: fix piix3_set_irq_pic()

* 'ppc-next' of git://repo.or.cz/qemu/agraf:
  Fix a bug in mtsr/mtsrin emulation on ppc64
  pSeries: Clean up write-only variables
  w32: Fix compilation and replace non-portable usage of ulong

* 's390-next' of git://repo.or.cz/qemu/agraf:
  s390x: complain when allocating ram fails
  s390x: fix memory detection for guests > 64GB
  s390x: change mapping base to allow guests > 2GB
  s390x: Fix debugging for unknown sigp order codes
  s390x: build s390x by default
  s390x: remove compatibility cc field
  s390x: Adjust GDB stub
  s390x: translate engine for s390x CPU
  s390x: Adjust internal kvm code
  s390x: Implement opcode helpers
  s390x: helper functions for system emulation
  s390x: Shift variables in CPUState for memset(0)
  s390x: keep hint on virtio managing size
  s390x: make kvm exported functions conditional on kvm
  s390x: s390x-linux-user support
  tcg: extend max tcg opcodes when using 64-on-32bit
  s390x: fix smp support for kvm

Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

The SDIO specification introduces new commands 52 and 53.
Handle as illegal command but do not complain on stderr,
as SDIO-aware OSes (including Linux) may legitimately use
these in their probing for presence of an SDIO card.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Remove a duplicate #include of sysbus.h.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>