Commit Graph

31 Commits

Author SHA1 Message Date
Felipe Balbi
e261779605 usb: dwc3: ep0: fix GetStatus handling (again)
previous commit fixed part of it but it was still
calling usb_ep_queue() from IRQ context without
loosing locks. That cannot be done otherwise we will
have a recursive locking.

Also, we need to assign the 'dep' pointer on
dwc->ep0_usb_req otherwise we will have a NULL
pointer dereference on dwc3_map_buffer_to_dma().

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:46 +02:00
Sebastian Andrzej Siewior
e0ce0b0a0a usb: dwc3: ep0: use dwc3_request for ep0 requsts instead of usb_request
Instead of special functions and shortcuts for sending our internal
answers to the host we started doing what the gadget does and used the
public API for this. Since we only were using a few fields the
usb_request was enough. Later added the list handling in order to
synchronize the host / gadget events and now we require to have the
dwc3_request struct around our usb_request or else we touch memory that
does not belong to us. So this patch does this.

Reported-by: Partha Basak <p-basak2@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:45 +02:00
Felipe Balbi
df62df56e1 usb: dwc3: workaround: missing disconnect event
DWC3 revisions <1.88a have an issue which would
case a missing Disconnect event if cable is
disconnected while there's a Setup packet
pending the FIFO.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:42 +02:00
Sebastian Andrzej Siewior
5bdb1dcc63 usb: dwc3: ep0: handle delayed_status again
Since the re-worked ep0 handling (which uses HW's hints to recognize the ep0
status) we lost the delayed status handling. This is used by the file and mass
storage gadget to gain some extra time so setup its internal status before it
can proceed further requests.
In particular the storage gadget does nothing on USB_REQ_SET_CONFIGURATION but
wakes up a thread which handles the request. If the udc driver continues ep0
handling before the thread did its work then then endpoint is not yet
configured and further requests will fail. Once the gadget is ready, it will
enqueue an empty packet which is used for synchronization.
In order to fix this issue, the patch does the following:
Set ->delayed_status once the delayed_status has been notices and do not
continue on the next XferNotReady event. We will continues ep0 processing once
the gadget enqueued the zero packet for synchronization.

A cleaner approach would be to enforce the gadget to enqueue an empty
(zero) request even for the status phase but this would do for now.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:31 +02:00
Sebastian Andrzej Siewior
f0f2b2a2db usb: dwc3: ep0: push ep0state into xfernotready processing
We wait for the XferNotReady before we start the transfer and by then we
know ep0 state in which we supposed to be.
This is some cleanup work for the following patch in which we require to
know the ep0 state before the transfer completes.
While here, also change the argument to dwc3_ep0_do_control_status() so
we don't require the complete event structure but only the required
piece of information.

Inspired-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:30 +02:00
Felipe Balbi
8becf27044 usb: dwc3: fix sparse errors
sparse caught three mistakes on this driver,
fix them:

drivers/usb/dwc3/ep0.c:806:29: warning: duplicate const
drivers/usb/dwc3/debugfs.c:481:15: warning: symbol 'dwc3_debugfs_init' \
	was not declared. Should it be static?
drivers/usb/dwc3/debugfs.c:518:16: warning: symbol 'dwc3_debugfs_exit' \
	was not declared. Should it be static?

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:29 +02:00
Felipe Balbi
25b8ff68bf usb: dwc3: fix few coding style problems
There were a few coding style issues with this driver
which are now fixed:

drivers/usb/dwc3/debugfs.c:48: WARNING: Use #include \
	<linux/uaccess.h> instead of <asm/uaccess.h>
drivers/usb/dwc3/debugfs.c:484: ERROR: space required \
	before the open brace '{'
drivers/usb/dwc3/ep0.c:261: WARNING: line over 80 characters
drivers/usb/dwc3/ep0.c:287: WARNING: suspect code indent \
	for conditional statements (16, 23)
drivers/usb/dwc3/gadget.c:749: WARNING: line over 80 characters
drivers/usb/dwc3/gadget.c:1267: WARNING: line over 80 characters
drivers/usb/dwc3/gadget.h:116: WARNING: line over 80 characters
drivers/usb/dwc3/io.h:42: WARNING: Use #include \
	<linux/io.h> instead of <asm/io.h>

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:29 +02:00
Sebastian Andrzej Siewior
c2da2ff006 usb: dwc3: ep0: don't use ep0in for transfers
In "usb: dwc3: remove special status request handling in ep0" I simplied
a few things and used the generic API for the status transfers. The bug
I introcuded here is that we queue now requests to dep[1] but we don't
clear that list in the stall+start case.
Actually we don't need to use dep[1] at all. We only did in the past to
talk to the correct endpoint (i.e. in or out). This is now take care of
in a diffent place within the ep0 code. So we could queue the in
transfers to dep[0] and don't use dep[1] at all.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:25 +02:00
Sebastian Andrzej Siewior
1e7618d8a1 usb: dwc3: ep0: use proper endianess in SetFeature for wIndex
The first access was correct, the second was wrong.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:25 +02:00
Sebastian Andrzej Siewior
8ee6270c7f usb: dwc3: remove special status request handling in ep0
The GetStatus (STD)-request is handled the driver and uses a tiny hack
to send the two bytes long answer. This patch removes the custom hack
uses the normal usb_ep_queue() for that.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:21 +02:00
Sebastian Andrzej Siewior
0cc7a519c4 usb: dwc3: reset pending status flag in error case
If we stall and restart we have to reset also this flag to 0 as there is
nothing pending anymore.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:20 +02:00
Felipe Balbi
9cc9bcd5b3 usb: dwc3: ep0: handle unexpected XferNotReady events
Sometimes the host might be trying to initiate Data or
Status phase for an older Control transfer. In such
situations we must STALL that transfer and restart
the state machine rather than letting such situation
go through the wire.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:16 +02:00
Felipe Balbi
f96a6ec1db usb: dwc3: ep0: SetAddress() won't be issued while Configured
I have talked to USB-IF about USB30CV issuing SetAddres()
with a device on Configured state and they have agreed on
changing USB30CV not to do so.

Adding back the STALL reply in such case and while at
that, also add a debugging message for an address which
is too large.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-12-12 11:48:15 +02:00
Felipe Balbi
dc1c70a774 usb: dwc3: convert structures into bitshifts
our parameter structures need to be written to
HW, so instead of assuming little endian, we
convert those into bit shifts.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:56 -07:00
Paul Zimmerman
b23c843992 usb: dwc3: gadget: fix DEPSTARTCFG for non-EP0 EPs
DEPSTARTCFG for non-EP0 EPs must only be sent once per config

[ balbi@ti.com : changed config_start to start_config_issued ]

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:52 -07:00
Sebastian Andrzej Siewior
49a25cc9a7 usb: dwc: remove "All rights reserved" statement.
Some people think that this line is not compatible with the GPL. The
statement was required due to the Buenos Aires Convention and is now
deprecated. I remove it because it is said that it is pointless nowdays.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:52 -07:00
Sebastian Andrzej Siewior
b147f3572d usb: dwc3: ep0: fix debug output
Use "ep0in" and "ep0out" instead "ep1in" and "ep0out" which is confusing
and not consistent with the remaining output.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:51 -07:00
Sebastian Andrzej Siewior
9876cbe2e2 usb: dwc3: ep0: remove second giveback in error case
We already give requests back in dwc3_ep0_stall_and_restart() so
doing it again here will most likely corrupt the list.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:51 -07:00
Felipe Balbi
25355be64e usb: dwc3: ep0: fix debug message
The way it was before was really meaningless.
Now it looks saner.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:51 -07:00
Felipe Balbi
d95b09b901 usb: dwc3: ep0: ignore direction on 2-stage transfer
We don't need to care about direction on a two stage
transfer.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:50 -07:00
Felipe Balbi
2646021e1d usb: dwc3: ep0: Make USB30CV happy with SetAddress
According to USB 3.0 Specification, a SetAddress()
while device is in Configured State has an unspecified
behavior (see Section 9.4.6). Still USB30CV wasn't
happy with my Stall reply.

To make that thing happy, just accept the SetAddress()
always. No problems have been observed thus far.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-10-04 10:25:50 -07:00
Felipe Balbi
55f3fba6c8 usb: dwc3: ep0: introduce ep0_expect_in flag
This flag will tell us which direction we're
expecting on the next (data or status) phase.

It will help us catching errors of host going
crazy and requesting data of the wrong direction.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:05:29 +03:00
Felipe Balbi
d742220b35 usb: dwc3: ep0: giveback requests on stall_and_restart
if we don't, the list will be busy forever.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:05:28 +03:00
Felipe Balbi
1ddcb218b5 usb: dwc3: use ep0_next_event field
Start tracking the next expected event and act
on the error conditions as suggested by databook.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:02:18 +03:00
Felipe Balbi
0b7836a9eb usb: dwc3: drop EP0_STALL state
Whenever we issue a Set Stall command on EP0,
the state machine will be restarted and Stall
is cleared automatically, when core receives
the next SETUP packet.

There's no need to track that EP0_STALL state.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:02:17 +03:00
Felipe Balbi
76cb323f80 usb: dwc3: ep0: clear all EP0 flags
when we're going to issue Set Stall command,
we should clear DWC3_EP_STALL flag, but also
we should clear BUSY, HALTED and all others.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:02:16 +03:00
Felipe Balbi
b673cf3002 usb: dwc3: ep0: fix Get Status handling
data was prepared on setup_buf but transfer
was started on ctrl_req, fix it.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:02:15 +03:00
Felipe Balbi
c7fcdeb262 usb: dwc3: ep0: simplify EP0 state machine
The DesignWare USB3 core tells us which phase
of a control transfer should be started, it
also tells us which physical endpoint needs
that transfer.

With these two informations, we have all we
need to simply EP0 handling quite a lot and
get rid rid of the SW state machine tracking
ep0 states.

For achieving this perfectly, we needed to
add support for situations where we get
XferNotReady while endpoint is still busy
and XferNotReady while gadget driver still
hasn't queued a request.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:02:07 +03:00
Felipe Balbi
a6829706ce usb: dwc3: ep0: add handling for unaligned OUT transfers
In case we have transfers which aren't aligned
to wMaxPacketSize, we need to be careful with
how we start the transfer with the HW. OUT
transfers _must_ be aligned with wMaxPacketSize
and in order to guarantee that, we use a bounce
buffer.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:02:05 +03:00
Felipe Balbi
c611ccb48a usb: dwc3: ep0: fix 'transfered' typo
trivial patch. No functional changes.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2011-09-09 13:02:00 +03:00
Felipe Balbi
72246da40f usb: Introduce DesignWare USB3 DRD Driver
The DesignWare USB3 is a highly
configurable IP Core which can be
instantiated as Dual-Role Device (DRD),
Peripheral Only and Host Only (XHCI)
configurations.

Several other parameters can be configured
like amount of FIFO space, amount of TX and
RX endpoints, amount of Host Interrupters,
etc.

The current driver has been validated with
a virtual model of version 1.73a of that core
and with an FPGA burned with version 1.83a
of the DRD core. We have support for PCIe
bus, which is used on FPGA prototyping, and
for the OMAP5, more adaptation (or glue)
layers can be easily added and the driver
is half prepared to handle any possible
configuration the HW engineer has chosen
considering we have the information on
one of the GHWPARAMS registers to do
runtime checking of certain features.

More runtime checks can, and should, be added
in order to make this driver even more flexible
with regards to number of endpoints, FIFO sizes,
transfer types, etc.

While this supports only the device side, for
now, we will add support for Host side (xHCI -
see the updated series Sebastian has sent [1])
and OTG after we have it all stabilized.

[1] http://marc.info/?l=linux-usb&m=131341992020339&w=2

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-22 16:03:11 -07:00