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Iago Abal [Tue, 21 Jun 2016 10:01:11 +0000 (12:01 +0200)]
usb: gadget: pch_udc: reorder spin_[un]lock to avoid deadlock
The above commit reordered spin_lock/unlock and now `&dev->lock' is acquired
(rather than released) before calling `dev->driver->disconnect',
`dev->driver->setup', `dev->driver->suspend', `usb_gadget_giveback_request', and
`usb_gadget_udc_reset'.
But this *may* not be the right way to fix the problem pointed by
d3cb25a12138.
Note that the other usb/gadget/udc drivers do release the lock before calling
these functions. There are also inconsistencies within pch_udc.c, where
`dev->driver->disconnect' is called while holding `&dev->lock' in lines 613 and
1184, but not in line 2739.
Finally, commit
d3cb25a12138 may have introduced several potential deadlocks.
For instance, EBA (https://github.com/models-team/eba) reports:
Double lock in drivers/usb/gadget/udc/pch_udc.c
first at 2791: spin_lock(& dev->lock); [pch_udc_isr]
second at 2694: spin_lock(& dev->lock); [pch_udc_svc_cfg_interrupt]
after calling from 2793: pch_udc_dev_isr(dev, dev_intr);
after calling from 2724: pch_udc_svc_cfg_interrupt(dev);
Similarly, other potential deadlocks are 2791 -> 2793 -> 2721 -> 2657; and
2791 -> 2793 -> 2711 -> 2573 -> 1499 -> 1480.
Fixes:
d3cb25a12138 ("usb: gadget: udc: fix spin_lock in pch_udc")
Signed-off-by: Iago Abal <mail@iagoabal.eu>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Sandhya Bankar [Wed, 4 May 2016 06:53:14 +0000 (12:23 +0530)]
usb: Use (foo *) instead of (foo*).
Use (foo *) instead of (foo*).
Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Baolin Wang [Mon, 16 May 2016 08:43:53 +0000 (16:43 +0800)]
dwc3: gadget: Implement the suspend entry event handler
It had changed to be suspend event for BIT6 in DEVT register from
version 2.30a and above. Thus this patch introduces one suspend
event handler to handle the suspend event.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Arnd Bergmann [Wed, 18 May 2016 21:24:06 +0000 (23:24 +0200)]
usb: phy: move msm_hsusb.h into driver
As a preparation for another cleanup, this moves the header file
for the phy-msm-usb driver into the driver itself. No other file
includes it any more, and we don't really want it in the global
namespace anyway.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Michal Nazarewicz [Sat, 21 May 2016 18:47:35 +0000 (20:47 +0200)]
usb: gadget: f_fs: buffer data from ‘oversized’ OUT requests
f_fs rounds up read(2) requests to a multiple of a max packet size
which means that host may provide more data than user has space for.
So far, the excess data has been silently ignored.
This introduces a buffer for a tail of such requests so that they are
returned on next read instead of being ignored.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Michal Nazarewicz [Sat, 21 May 2016 18:47:34 +0000 (20:47 +0200)]
usb: gadget: f_fs: printk error when excess data is dropped on read
Add a pr_err when host sent more data then the size of the buffer user
space gave us. This may happen on UDCs which require OUT requests to
be aligned to max packet size. The patch includes a description of the
situation.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Sandhya Bankar [Tue, 31 May 2016 12:59:44 +0000 (08:59 -0400)]
usb: phy: omap-otg: Space required after that ','.
Space required after that ','.
Reviewed-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Colin Ian King [Sat, 4 Jun 2016 05:53:25 +0000 (06:53 +0100)]
usb: gadget: bdc: fix spelling mistake: "allocted" -> "allocated"
trivial fix to spelling mistake
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Michal Nazarewicz [Tue, 31 May 2016 12:17:24 +0000 (14:17 +0200)]
usb: gadget: mv_u3d: fix unused-but-set-variable warnings
This patch fixes the following (W=1) warnings:
drivers/usb/gadget/udc/mv_u3d_core.c: In function ‘mv_u3d_process_ep_req’:
drivers/usb/gadget/udc/mv_u3d_core.c:124:6: warning: variable ‘trb_complete’ set but not used [-Wunused-but-set-variable]
int trb_complete, actual, remaining_length = 0;
^
drivers/usb/gadget/udc/mv_u3d_core.c:123:28: warning: variable ‘curr_ep_context’ set but not used [-Wunused-but-set-variable]
struct mv_u3d_ep_context *curr_ep_context;
^
drivers/usb/gadget/udc/mv_u3d_core.c:122:13: warning: variable ‘cur_deq_lo’ set but not used [-Wunused-but-set-variable]
dma_addr_t cur_deq_lo;
^
drivers/usb/gadget/udc/mv_u3d_core.c: In function ‘mv_u3d_ep_enable’:
drivers/usb/gadget/udc/mv_u3d_core.c:530:28: warning: variable ‘ep_context’ set but not used [-Wunused-but-set-variable]
struct mv_u3d_ep_context *ep_context;
^
drivers/usb/gadget/udc/mv_u3d_core.c: In function ‘mv_u3d_ep_disable’:
drivers/usb/gadget/udc/mv_u3d_core.c:636:28: warning: variable ‘ep_context’ set but not used [-Wunused-but-set-variable]
struct mv_u3d_ep_context *ep_context;
^
In doing so, it removes calls to ioread32 function which does I/O with
the device, but I hope the reads don’t have any side effects that are
needed.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Michal Nazarewicz [Tue, 31 May 2016 12:17:23 +0000 (14:17 +0200)]
usb: gadget: r8a66597: fix unused-but-set-variable warnings
This patch fixes the following (W=1) warnings:
drivers/usb/gadget/udc/r8a66597-udc.c: In function ‘r8a66597_irq’:
drivers/usb/gadget/udc/r8a66597-udc.c:1468:15: warning: variable ‘nrdyenb’ set but not used [-Wunused-but-set-variable]
u16 brdyenb, nrdyenb, bempenb;
^
drivers/usb/gadget/udc/r8a66597-udc.c:1467:15: warning: variable ‘nrdysts’ set but not used [-Wunused-but-set-variable]
u16 brdysts, nrdysts, bempsts;
^
In doing so, it removes calls to r8a66597_read function which does I/O
with the device, but I hope the reads don’t have any side effects that
are needed.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Michal Nazarewicz [Tue, 31 May 2016 12:17:22 +0000 (14:17 +0200)]
usb: gadget: m66592: fix unused-but-set-variable warnings
This patch fixes the following (W=1) warnings:
drivers/usb/gadget/udc/m66592-udc.c: In function ‘m66592_irq’:
drivers/usb/gadget/udc/m66592-udc.c:1203:15: warning: variable ‘nrdyenb’ set but not used [-Wunused-but-set-variable]
u16 brdyenb, nrdyenb, bempenb;
^
drivers/usb/gadget/udc/m66592-udc.c:1202:15: warning: variable ‘nrdysts’ set but not used [-Wunused-but-set-variable]
u16 brdysts, nrdysts, bempsts;
^
In doing so, it removes calls to m66592_read function which does I/O
with the device, but I hope the reads don’t have any side effects that
are needed.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Michal Nazarewicz [Tue, 31 May 2016 12:17:21 +0000 (14:17 +0200)]
usb: gadget: fix unused-but-set-variale warnings
Those are enabled with W=1 make option.
The patch leaves of some type-limits warnings which are caused by
generic macros used in a way where they produce always-false
conditions.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Roger Quadros [Fri, 10 Jun 2016 11:48:38 +0000 (14:48 +0300)]
usb: dwc3: core: cleanup IRQ resources
Implementations might use different IRQs for
host, gadget so use named interrupt resources
to allow device tree to specify the interrupts.
Following are the interrupt names
Peripheral Interrupt - peripheral
HOST Interrupt - host
Maintain backward compatibility for a single named
interrupt ("dwc3_usb3") for all interrupts as well as
unnamed interrupt at index 0 for all interrupts.
As platform_get_irq() variants are used, tackle
the -EPROBE_DEFER case as well.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Hans de Goede [Fri, 10 Jun 2016 09:46:25 +0000 (11:46 +0200)]
USB: Fix of_usb_get_dr_mode_by_phy with a shared phy block
Some SoCs have a single phy-hw-block with multiple phys, this is
modelled by a single phy dts node, so we end up with multiple
controller nodes with a phys property pointing to the phy-node
of the otg-phy.
Only one of these controllers typically is an otg controller, yet we
were checking the first controller who uses a phy from the block and
then end up looking for a dr_mode property in e.g. the ehci controller.
This commit fixes this by adding an arg0 parameter to
of_usb_get_dr_mode_by_phy and make of_usb_get_dr_mode_by_phy
check that this matches the phandle args[0] value when looking for
the otg controller.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Alexandre Belloni [Mon, 13 Jun 2016 08:47:30 +0000 (10:47 +0200)]
usb: gadget: udc: atmel: Also get regmap for at91sam9x5-pmc
The "atmel,at91sam9g45-udc" compatible UDC is also used on at91sam9x5 so it
is also necessary to try to get the syscon for at91sam9x5-pmc.
Fixes:
4747639f01c9 ("usb: gadget: atmel: access the PMC using regmap")
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:22 +0000 (18:07 -0700)]
usb: dwc2: gadget: Final fixes for BDMA ISOC
Done fixes and tested hsotg gadget's BDMA mode. Tested Control,
Bulk, Isoc, Inter transfers. Added code for isoc transfers,
removed unusable code, done minor fixes. Affected functions
and IRQ handlers:
- dwc2_hsotg_start_req(),
- dwc2_hsotg_ep_enable(),
- dwc2_hsotg_ep_queue(),
- dwc2_hsotg_handle_outdone(),
- GINTSTS_GOUTNAKEFF handler,
Removed 'has_correct_parity' flag from 'dwc2_hsotg_ep' struct.
Before this patch series, to set the data pid the DWC2 gadget
driver was toggling the even/odd until it match, then were
leaving it set. But now I have added mechanism to set pid and
excluded all code where this flag was set.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:19 +0000 (18:07 -0700)]
usb: dwc2: gadget: Add EP disabled interrupt handler
Reimplemented EP disabled interrupt handler and moved to
corresponding function.
This interrupt indicates that the endpoint has been disabled per
the application's request.
For IN endpoints flushes txfifo, in case of BULK clears DCTL_CGNPINNAK,
in case of ISOC completes current request.
For ISOC-OUT endpoints completes expired requests. If there is
remaining request starts it. This is the part of ISOC-OUT transfer
drop flow. When ISOC-OUT transfer expired we must disable ep to drop
ongoing transfer.
Tested-by: John Keeping <john@metanate.com>
Reviewed-by: Vahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:17 +0000 (18:07 -0700)]
usb: dwc2: gadget: Add Incomplete ISO IN/OUT Interrupt handlers
Incomplete ISO IN interrupt indicates one of the following conditions
occurred while transmitting an ISOC transaction.
- Corrupted IN Token for ISOC EP.
- Packet not complete in FIFO.
Incomplete ISO OUT indicates that there is at least one isochronous OUT
endpoint on which the transfer is not completed in the current
microframe.
The following actions will be taken:
In case of EP-IN
- Determine the EP
- Disable EP directly from this handler; when "Endpoint Disabled"
interrupt is received flush FIFO
In case of EP-OUT
- Determine the EP
- If target frame elapsed set DCTL_SGOUTNAK, unmask GOUTNAKEFF and
proceed as described in section 7.5.1 of DWC-HSOTG Programming Guide
Also added dwc2_gadget_target_frame_elapsed() helper function which
will be used in Incomplete ISO IN/OUT Interrupt handlers.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:14 +0000 (18:07 -0700)]
usb: dwc2: gadget: Add OUTTKNEPDIS and NAKINTRPT handlers
NAKINTRPT interrupt is starting point for isoc-in transfer,
synchronization done with first in token received from host,
core asserts this interrupt when responds with 0 length data
to in token, received from host.
The first IN token is asynchronous for device - device does not
know when first one token will arrive from host. On first token
arrival HW generates 2 interrupts: 'in token received while FIFO
empty' and 'NAK'. NAK interrupt for ISOC in means that token has
arrived and ZLP was sent in response to that as there was no data
in FIFO. SW is basing on this interrupt to obtain frame in which
token has come and then based on the interval calculates next
frame for transfer.
OUTTKNEPDIS interrupt is starting point for isoc-out transfer,
synchronization done with first out token received from host
while corresponding ep is disabled.
For OUTs the reason is same - device does not know initial frame
in which out token will come. For this HW generates OUTTKNEPDIS
- out token is received while EP is disabled. Upon getting this
interrupt SW starts calculation for next transfer frame.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:12 +0000 (18:07 -0700)]
usb: dwc2: gadget: Add dwc2_gadget_start_next_request function
Replaced repeating code with function call.
Starts next request from ep queue.
If queue is empty and ep is isoc
-In case of OUT-EP unmasks OUTTKNEPDIS.
OUTTKNEPDIS is masked in it's handler, so we need to unmask it here
to be able to do resynchronization.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:10 +0000 (18:07 -0700)]
usb: dwc2: gadget: Add dwc2_gadget_read_ep_interrupts function
Reads and returns interrupts for given endpoint, by masking epint_reg
with corresponding mask.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:07 +0000 (18:07 -0700)]
usb: dwc2: gadget: Corrected interval calculation
Calculate the interval according to the USB 2.0 specification section
9.6.6.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:05 +0000 (18:07 -0700)]
usb: dwc2: gadget: Add dwc2_gadget_incr_frame_num()
Increases and checks targeted frame number of current ep
if overrun happened, sets flag and masks with DSTS_SOFFN_LIMIT
Added following fields to struct dwc2_hsotg_ep
-target_frame: Targeted frame num to setup next ISOC transfer
-frame_overrun: Indicates SOF number overrun in DSTS
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:02 +0000 (18:07 -0700)]
usb: dwc2: gadget: Fix transfer stop programming for out endpoint
According DWC-OTG databook, "GOUTNakEff" is read only and can be
cleared only by "DCTL.CGOUTNak", but here we do not need to clear
it because DWC-OTG programming guide says that before disabling
any OUT endpoint, the application must enable Global OUT NAK mode,
so if this mode is enabled we can continue without this step.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:07:00 +0000 (18:07 -0700)]
usb: dwc2: gadget: Corrected field names
No-op change. Changed field names to prevent misunderstanding.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:06:58 +0000 (18:06 -0700)]
usb: dwc2: gadget: Remove unnecessary code
This chunk is not needed here. There is no functionality
depend on this, so if no-op, I think we do not need to have
this interrupt unmasked.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:06:55 +0000 (18:06 -0700)]
usb: dwc2: gadget: Remove unnecessary line
Removed "ctrl |= DXEPCTL_USBACTEP" from
dwc2_hsotg_start_req() function because this
step is done in dwc2_hsotg_ep_enable().
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Vardan Mikayelyan [Thu, 26 May 2016 01:06:53 +0000 (18:06 -0700)]
usb: dwc2: Add missing register field definitions
Added register field definitions, register names are according
DWC-OTG databook.
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Arnd Bergmann [Thu, 16 Jun 2016 11:38:25 +0000 (13:38 +0200)]
usb: pxa27x_udc: remove unused function argument
We get a warning for this when building with W=1 because the
argument gets assigned to something else but never read:
drivers/usb/gadget/udc/pxa27x_udc.c: In function 'stop_activity':
drivers/usb/gadget/udc/pxa27x_udc.c:1828:74: error: parameter 'driver' set but not used [-Werror=unused-but-set-parameter]
This remove the argument entirely.
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Baolin Wang [Mon, 20 Jun 2016 08:19:48 +0000 (16:19 +0800)]
usb: dwc3: gadget: Add the suspend state checking when stopping gadget
It will be crash to stop gadget when the dwc3 device had been into suspend
state, thus we need to check if the dwc3 device had been into suspend state
when UDC try to stop gadget.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 21 Jun 2016 07:32:02 +0000 (10:32 +0300)]
usb: dwc3: gadget: issue ENDTRANSFER conditional on resource_index
Because of recent changes to transfer handling on
DWC3, we will not get XferComplete unless we
completely fill up our TRB ring. This means that we
might get a Reset or Disconnect without getting a
XferComplete first.
In order to correctly release our allocated Transfer
Resource, we must issue ENDTRANSFER command whenever
dep->resource_index is valid.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Roger Quadros [Fri, 10 Jun 2016 11:38:02 +0000 (14:38 +0300)]
usb: dwc3: fix runtime PM in error path
If there is a failure after pm_runtime_enable/get_sync()
we need to call pm_runtime_disable/put_sync().
Otherwise it will lead to an unbalanced pm_runtime_enable() on the
subsequent probe if the earlier probe bailed out due to -EPROBE_DEFER.
pm_runtime_get_sync() can fail as well so deal with that case too.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Thu, 9 Jun 2016 13:47:05 +0000 (16:47 +0300)]
usb: dwc3: gadget: simplify run_stop() break condition
it's clear now that when is_on=true, we must loop
until DWC3_DSTS_DEVCTRLHLT clears; while when
is_on=false we must loop until DWC3_DSTS_DEVCTRLHLT
gets set.
Instead of adding actual if() statements, we can
rely on XOR operation to evaluate to true only when
the above conditions apply. Then, we can move the
break condition back to the while() statement
together with our timeout check and the resulting
code is very compact and simpler to read.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Thu, 9 Jun 2016 13:31:34 +0000 (16:31 +0300)]
usb: dwc3: gadget: avoid while(1) in run_stop()
instead of looping forever and forcing a return if
timeout reaches zero, we can just use timeout and
loop's break condition directly.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Thu, 9 Jun 2016 13:24:08 +0000 (16:24 +0300)]
usb: dwc3: gadget: remove udelay() from run_stop()
testing shows that udelay() is unnecessary as
controller reaches Halted state almost
instantenously as can be seen by our timeout
variable never actually decrementing.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 7 Jun 2016 09:55:19 +0000 (12:55 +0300)]
usb: dwc3: core: fixup dr_mode fallback selection
We shouldn't change a host-only dwc3 to gadget-only
if driver is built as gadget-only. Fix that up here.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 7 Jun 2016 09:49:52 +0000 (12:49 +0300)]
usb: dwc3: pci: add dr-mode for Intel dwc3
It's know that Intel's SoCs' dwc3 integration is
peripheral-only since Intel implements its own
portmux for role-swapping. In order to prevent dwc3
from ever registering and XHCI platform_device,
let's just set dr-mode to peripheral-only on Intel
SoCs.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Thu, 2 Jun 2016 09:37:31 +0000 (12:37 +0300)]
usb: dwc3: gadget: rename 'ignore' argument to 'modify'
'modify' is what the current action is called. Let's
rename it so it matches databook. While at that,
also make sure to add support 'init' action too.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 31 May 2016 10:39:21 +0000 (13:39 +0300)]
usb: gadget: add tracepoints to the gadget API
This new set of tracepoints will help all gadget
drivers and UDC drivers when problem appears. Note
that, in order to be able to add tracepoints to
udc-core.c we had to rename that to core.c and
statically link it with trace.c to form
udc-core.o. This is to make sure that module name
stays the same.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 31 May 2016 10:07:47 +0000 (13:07 +0300)]
usb: gadget: move gadget API functions to udc-core
instead of defining all functions as static inlines,
let's move them to udc-core and export them with
EXPORT_SYMBOL_GPL, that way we can make sure that
only GPL drivers will use them.
As a side effect, it'll be nicer to add tracepoints
to the gadget API.
While at that, also fix Kconfig dependencies to
avoid randconfig build failures.
Acked-By: Sebastian Reichel <sre@kernel.org>
Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 30 May 2016 10:42:33 +0000 (13:42 +0300)]
usb: dwc3: gadget: decrement trbs_left for each sg entry
If we don't, we will overwrite valid TRBs.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 30 May 2016 10:41:22 +0000 (13:41 +0300)]
usb: dwc3: gadget: start Bulk endpoints more frequently
Now we can try to issue Update Transfer every time
gadget driver queues a new request. This will make
sure we keep controller's queue busy for as long as
possible.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 30 May 2016 10:40:00 +0000 (13:40 +0300)]
usb: dwc3: gadget: disable XFER_NOT_READY
We don't need this IRQ anymore for interrupt or bulk
endpoints.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 30 May 2016 10:38:32 +0000 (13:38 +0300)]
usb: dwc3: gadget: use allocated/queued reqs for LST bit
Let's only set LST bit when we run out of space in
our TRB ring. For all other cases, we keep LST bit
unset which will prevent constant allocation and
deallocation of endpoint transfer resources.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 30 May 2016 10:37:02 +0000 (13:37 +0300)]
usb: dwc3: gadget: halt and stop based HWO bit
Instead of relying on empty list of queued requests,
let's rely on the fact that we have a TRB being
processed right now.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 30 May 2016 10:34:58 +0000 (13:34 +0300)]
usb: dwc3: gadget: keep track of allocated and queued reqs
We will be using this information to change how we
figure out when we need LST bit. For now, just
update our counters.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 30 May 2016 10:29:35 +0000 (13:29 +0300)]
usb: dwc3: gadget: update transfer needs transfer resource
According to SNPS databook, we need to pass transfer
resource on update transfer command, let's do it.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Heikki Krogerus [Fri, 22 Apr 2016 08:17:40 +0000 (11:17 +0300)]
usb: dwc3: remove handling of platform data
No more users for it.
Tested-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Heikki Krogerus [Fri, 22 Apr 2016 08:17:39 +0000 (11:17 +0300)]
usb: dwc3: pci: use build-in properties instead of platform data
This should allow the core driver to drop handling of
platform data and expect the platform specific details to
always come from properties.
Tested-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Huang Rui <ray.huang@amd.com>
CC: John Youn <John.Youn@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 24 May 2016 10:45:17 +0000 (13:45 +0300)]
usb: dwc3: remove trailing newline from dwc3_trace
when passing strings to trace, we don't need the
trailing newline character. Trace already appends a
newline character automatically.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Roger Quadros [Wed, 11 May 2016 14:36:45 +0000 (17:36 +0300)]
usb: dwc3: omap: Pass VBUS and ID events transparently
Don't make any decisions regarding VBUS session based on ID
status. That is best left to the OTG core.
Pass ID and VBUS events independent of each other so that OTG
core knows exactly what to do.
This makes dual-role with extcon work with OTG irq on OMAP platforms.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Roger Quadros [Wed, 11 May 2016 14:36:44 +0000 (17:36 +0300)]
usb: dwc3: omap: Don't set POWERPRESENT
TRM [1] recommends that POWERPRESENT bit must not be
set and left at it's default value of 0.
[1] OMAP542x TRM - http://www.ti.com/lit/pdf/swpu249
Section 23.11.4.5.1 Mailbox VBUS/ID Management
"Because PIPE powerpresent has a different meaning in host and in device mode,
and because of the redundancy with the UTMI signals, the controller ORes
together the appropriate PIPE and UTMI inputs to create its internal
VBUS status. For that reason, it is recommended to leave field
USBOTGSS_UTMI_OTG_STATUS[9] POWERPRESENT at its default value (=0), and only to
fill in the USB2 VBUS status fields in the same register."
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Roger Quadros [Wed, 11 May 2016 14:36:43 +0000 (17:36 +0300)]
usb: dwc3: omap: Mark the interrupt handler as shared
On OMAPs, OTG events come on the same IRQ so we need to share
this IRQ with the OTG device driver.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Roger Quadros [Wed, 11 May 2016 14:36:42 +0000 (17:36 +0300)]
usb: dwc3: omap: use request_threaded_irq()
We intend to share this interrupt with the OTG driver an to ensure
that irqflags match for the shared interrupt handlers we use
request_threaded_irq()
If we don't use request_treaded_irq() then forced threaded irq will
set IRQF_ONESHOT and this won't match with the OTG IRQ handler's
IRQ flags.
NOTE: OTG IRQ handler is yet to be added. This is a preparatory step.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
William Wu [Fri, 13 May 2016 10:13:46 +0000 (18:13 +0800)]
usb: dwc3: add DWC3_GUCTL1 reg for debug
GUCTL1 reg has some useful functions which can be
written by user. For rockchip platform, we set
GUCTL1.DEV_FORCE_20_CLK_FOR_30_CLK (bit26, applicable
for the core is programmed to operate in 2.0 device
only) to 1 in bootrom, and after start the kernel,
we want to check whether this bit can be reset to
default 0 after the core reset. Dump GUCTL1 reg from
debugfs is more convenient for us.
Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 23:34:23 +0000 (16:34 -0700)]
usb: dwc3: Fix DWC3_USB31_REVISION_110A definition
The DWC3_USB31_REVISION_110A macro uses an invalid constant name in its
definition. This is currently not used.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 23:34:26 +0000 (16:34 -0700)]
usb: dwc3: Use the correct speed macros for DSTS/DCFG
Correct the use of the DWC3_DSTS_XXX_SPEED and DWC3_DCFG_XXX_SPEED
macros. The wrong set of macros were being used in a few places.
This is only a cosmetic change as the values for both sets are
identical.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Mon, 23 May 2016 18:32:45 +0000 (11:32 -0700)]
usb: dwc3: gadget: Fix truncated cast issue
From sparse:
warning: cast truncates bits from constant value (100 becomes 0)
The DWC3_TRB_NUM constant is too big for u8. Do the calculation a
slightly different way that should still be optimized out for the case
where DWC3_TRB_NUM == 256.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 00:26:17 +0000 (17:26 -0700)]
usb: dwc3: gadget: Handle TRB index 0 when full or empty
If the trb->enqueue == trb->dequeue, then it could be full or empty.
This could also happen at TRB index 0, so modify the check to handle
that condition. At index 0, the previous TRB is the one just before the
link TRB.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 00:26:15 +0000 (17:26 -0700)]
usb: dwc3: gadget: Account for link TRB in TRBs left
The TRBs left calculation didn't account for the link TRB taking up one
spot.
If the trb_dequeue < trb_enqueue, then the result includes the link
TRB slot so it must be adjusted.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 00:26:12 +0000 (17:26 -0700)]
usb: dwc3: gadget: Account for max size in TRB space
The current calculation takes dep->trb_dequeue - dep->trb_enqueue to
find the TRB space left.
If you enqueue 1, that results in:
(u8) 0 - (u8) 1 = 0xff = 255 TRBs left.
This is correct if DWC3_TRB_NUM == 256.
If DWC3_TRB_NUM is less than 256 (but still a power of 2) you need to
mod the result by DWC3_TRB_NUM.
For example the same calculation with DWC3_TRB_NUM = 8, results in:
255 % 6 = 7 TRBs left.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 00:26:10 +0000 (17:26 -0700)]
usb: dwc3: gadget: Don't prepare TRBs if no space
If trbs_left == 0, we don't have any space left in the TRB ring so don't
prepare anything.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 00:26:08 +0000 (17:26 -0700)]
usb: dwc3: gadget: Initialize the TRB ring
Clears out all the TRBs in the ring to clean up any stale data that
might be in them from the previous time the endpoint was enabled.
Also removed the existing clear of the LINK trb since the entire ring is
cleard just before.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Fri, 20 May 2016 00:26:05 +0000 (17:26 -0700)]
usb: dwc3: gadget: Simplify skipping of link TRBs
Make the skipping of the link TRBS built-in to the increment operation.
This simplifies the code wherever we increment the trb index and ensures
that we never end up pointing to a link trb.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Mon, 23 May 2016 18:32:47 +0000 (11:32 -0700)]
usb: dwc3: Endianness issue on dwc3_log_ctrl
Sparse complains even though it looks ok. Probably it cannot detect that
the wValue, wIndex, and wLength are declared __le16 due to the macro
magic.
Redeclare them as CPU endianness and make the conversion on assignment.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Mon, 23 May 2016 18:32:43 +0000 (11:32 -0700)]
usb: dwc3: gadget: Fix usage of bitwise operator
Cleans up the sparse warning:
warning: dubious: x | !y
Since we do want a bitwise OR here, don't use a logical (true/false)
value. Probably is not a real issue but it cleans up the warning.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Mon, 23 May 2016 18:32:40 +0000 (11:32 -0700)]
usb: dwc3: ep0: Use the correct type for SET_SEL data
u2sel and u2pel should be __le16. Doesn't fix any issue.
Found with sparse.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
John Youn [Mon, 23 May 2016 18:32:38 +0000 (11:32 -0700)]
usb: dwc3: ep0: Fix endianness of wIndex passed to dwc3_wIndex_to_dep
The wIndex passed in here is CPU endianness, but the function expects
little endian.
Found with sparse.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 11:16:19 +0000 (14:16 +0300)]
usb: dwc3: gadget: improve gcmd trace
Just like we did for endpoint commands, let's have a
single trace output for the command and its
status. This will improve trace readability
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 11:08:47 +0000 (14:08 +0300)]
usb: dwc3: gadget: remove udelay() from generic cmd
We want commands to finish ASAP, so let's remove
that udelay() call.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 11:06:07 +0000 (14:06 +0300)]
usb: dwc3: gadget: single return point on generic commands
Just like we did for endpoint commands, let's use a
single return point for generic commands as
well. This aids readability.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 11:02:33 +0000 (14:02 +0300)]
usb: dwc3: trace: print ep cmd status with a single trace
Instead of printing command's status with a separate
trace printout, let's print it within a single call.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 10:53:34 +0000 (13:53 +0300)]
usb: dwc3: gadget: loop while (timeout)
instead of having infinite loop and always checking
timeout value as a break condition, we can just
decrement timeout inside while's condition.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 10:50:29 +0000 (13:50 +0300)]
usb: dwc3: gadget: fix trace output when command fails
We don't need the extra %s when command fails.
Let's remove it
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 08:10:08 +0000 (11:10 +0300)]
usb: dwc3: trace: fully decode IRQ events
This will make it more human-friendly to read trace
output from dwc3.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 23 May 2016 08:27:26 +0000 (11:27 +0300)]
usb: dwc3: gadget: no more tracking endpoint type with its name
I really thought this would be useful, but as it
turns out, it creates more problems than fixes. The
amount of times we had to fix this because some
other commit shuffled things around and ended up
regressing this tiny little string manupulation...
Might as well remove it, since it has a negligible
added benefit.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Janusz Dziedzic [Fri, 20 May 2016 08:37:13 +0000 (10:37 +0200)]
usb: dwc3: trace: pretty-print TRB's ctrl field
Improve trb tracing by showing trb flags, interrupts
trb type.
trb flags:
- h - hardware owner of descriptor
- l - last TRB
- c - chain buffers
- s - continue on short packet
interrupt flags:
- s - interrupt on short packet
- c - interrupt on complete
Capital letter means that bit is set, while
lowercase letter means bit is cleared.
Signed-off-by: Janusz Dziedzic <januszx.dziedzic@linux.intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Wed, 13 Apr 2016 13:44:39 +0000 (16:44 +0300)]
usb: dwc3: gadget: add a per-endpoint request queue lock
This will allow us to process several endpoints at a
time by making sure that we lock only shared
resources.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 17 May 2016 07:15:02 +0000 (10:15 +0300)]
usb: dwc3: pci: add Power Management dummy hooks
Allow for dwc3-pci to reach D3 and enable pm_runtime
by providing dummy PM hooks. Without them, PCI
subsystem won't put device to D3.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 16 May 2016 10:14:48 +0000 (13:14 +0300)]
usb: dwc3: implement runtime PM
this patch implements the most basic pm_runtime
support for dwc3. Whenever USB cable is dettached,
then we will allow core to runtime_suspend.
Runtime suspending will involve completely tearing
down event buffers and require a full soft-reset of
the IP.
Note that a further optimization could be
implemented once we decide to support hibernation,
which is to allow runtime_suspend with cable
connected when bus is in U3. That's subject to a
separate patch, however.
Tested-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Wed, 18 May 2016 09:37:21 +0000 (12:37 +0300)]
usb: dwc3: gadget: fix for possible endpoint disable race
when we call dwc3_gadget_giveback(), we end up
releasing our controller's lock. Another thread
could get scheduled and disable the endpoint,
subsequently setting dep->endpoint.desc to NULL.
In that case, we would end up dereferencing a NULL
pointer which would result in a Kernel Oops. Let's
avoid the problem by simply returning early if we
have a NULL descriptor.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Konrad Leszczynski [Mon, 8 Feb 2016 15:13:12 +0000 (16:13 +0100)]
usb: dwc3: fix for the isoc transfer EP_BUSY flag
commit
f3af36511e60 ("usb: dwc3: gadget: always
enable IOC on bulk/interrupt transfers") ended up
regressing Isochronous endpoints by clearing
DWC3_EP_BUSY flag too early, which resulted in
choppy audio playback over USB.
Fix that by partially reverting original commit and
making sure that we check for isochronous endpoints.
Fixes:
f3af36511e60 ("usb: dwc3: gadget: always enable IOC
on bulk/interrupt transfers")
Cc: <stable@vger.kernel.org>
Signed-off-by: Konrad Leszczynski <konrad.leszczynski@intel.com>
Signed-off-by: Rafal Redzimski <rafal.f.redzimski@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 17 May 2016 11:55:58 +0000 (14:55 +0300)]
usb: dwc3: gadget: only resume USB2 PHY in <=HIGHSPEED
As a micro-power optimization, let's only resume the
USB2 PHY if we're working on <=HIGHSPEED. If we're
gonna work on SUPERSPEED or SUPERSPEED+, there's no
point in resuming the USB2 PHY.
Fixes:
2b0f11df84bb ("usb: dwc3: gadget: clear SUSPHY bit before ep cmds")
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 16 May 2016 11:17:06 +0000 (14:17 +0300)]
usb: dwc3: gadget: hold gadget IRQ in dwc->irq_gadget
by holding gadget's IRQ number in dwc->irq_gadget,
it'll be simpler to free_irq() and disable the IRQ
in case an IRQ fires while we are runtime suspended.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 16 May 2016 07:52:58 +0000 (10:52 +0300)]
usb: dwc3: core: simplify suspend/resume operations
now that we have re-factored dwc3_core_init() and
dwc3_core_exit() we can use them for suspend/resume
operations.
This will help us avoid some common mistakes when
patching code when we have duplicated pieces of code
doing the same thing.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 16 May 2016 07:49:01 +0000 (10:49 +0300)]
usb: dwc3: core: re-factor init and exit paths
The idea of this patch is for dwc3_core_init() to
abstract all the details about how to initialize
dwc3 and dwc3_core_exit() to do the same for
teardown.
With this, we can simplify suspend/resume operations
by a large margin and always know that we're going
to start dwc3 from a known starting point.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 16 May 2016 07:42:23 +0000 (10:42 +0300)]
usb: dwc3: core: move fladj to dwc3 structure
this patch is in preparation for some further
re-factoring in dwc3 initialization. No functional
changes.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 12 Apr 2016 13:53:39 +0000 (16:53 +0300)]
usb: dwc3: gadget: add a pointer to endpoint registers
By adding a pointer to endpoint registers' base
address, we can avoid using our controller-wide
struct dwc3 pointer for everything. At some point
this will allow us to have per-endpoint locks which
will, in turn, let us queue requests to separate
endpoints in parallel.
Because of this change our debugfs interface and io
accessors need to be changed accordingly.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Tue, 12 Apr 2016 13:42:43 +0000 (16:42 +0300)]
usb: dwc3: gadget: pass dep as argument to endpoint command
In all call sites of dwc3_send_gadget_ep_cmd() we
already had a valid dep pointer, so instead of
passing dwc and dep->number, which would be used to
fetch the same pointer we already had, just pass dep
directly.
In other words, we're changing:
struct dwc3_ep *dep = dwc[dep->number];
to just passing struct dwc3_ep *dep as argument.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Fri, 13 May 2016 11:09:59 +0000 (14:09 +0300)]
usb: dwc3: gadget: initialize NUMP based on RxFIFO Size
Instead of using burst size to configure NUMP, we
should be using RxFIFO Size instead. DWC3 is smart
enough to know that it shouldn't burst in case burst
size is 0.
Reported-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Fri, 13 May 2016 09:42:44 +0000 (12:42 +0300)]
usb: dwc3: gadget: split __dwc3_gadget_kick_transfer()
To aid code readability, we're gonna split
__dwc3_gadget_kick_transfer() into its constituent
parts: scatter gather and linear buffers.
That way, it's easier to follow the code and focus
debug effort when one or the other fails.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Fri, 13 May 2016 07:19:42 +0000 (10:19 +0300)]
usb: dwc3: gadget: return 0 if we try to Wakeup in superspeed
Instead of returning -EINVAL when someone calls
__dwc3_gadget_wakeup() in speeds > highspeed, let's
return 0. There are no problems for the driver for
calling it in superspeed as we cleanly just return.
This avoids an annoying WARN_ONCE() always
triggering during superspeed enumeration with LPM
enabled.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Fri, 13 May 2016 07:11:59 +0000 (10:11 +0300)]
usb: dwc3: gadget: remove udelay(1) when sending ep cmds
When we send an endpoint command, we want that to
complete as soon as possible, so let's remove the
unnecessary udelay(1) call.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Fri, 13 May 2016 07:07:47 +0000 (10:07 +0300)]
usb: dwc3: gadget: rely on sg_is_last() and list_is_last()
sg_is_last() and list_is_last() will encode the
required information for the driver to make
decisions WRT CHN and LST bits.
While at that, also replace '1' with 'true' for
consistency.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Thu, 12 May 2016 13:53:59 +0000 (16:53 +0300)]
usb: dwc3: gadget: simplify __dwc3_gadget_kick_transfer()
as it turns out, we don't need the extra 'start_new'
argument as that can be inferred from DWC3_EP_BUSY
flag.
Because of that, we can simplify
__dwc3_gadget_kick_transfer() by quite a bit, even
allowing us to prepare more TRBs unconditionally.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Thu, 12 May 2016 11:08:34 +0000 (14:08 +0300)]
usb: dwc3: gadget: prepare TRBs on update transfers too
If we're updating transfers, we can also prepare as
many TRBs as we can fit in the ring. Let's start
doing that.
This patch 'solves' a limitation of how many TRBs we
can prepare when we're getting close the end of the
ring. Instead driver to prepare only up to end of
the ring, we check if we have space to wrap around
the ring properly.
Note that this only happens when our enqueue and
dequeue pointers are equal (which is the case for
bulk endpoints after an XferComplete event).
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Mon, 9 May 2016 12:27:01 +0000 (15:27 +0300)]
usb: dwc3: core: get rid of DWC3_PM_OPS macro
that macro is unnecessary and just adds pointless
obfuscation. Let's remove it.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Wed, 4 May 2016 12:50:27 +0000 (15:50 +0300)]
usb: dwc3: gadget: fix gadget suspend/resume
Instead of trying hard to stay connected to the
host, it's best (and far easier) to disconnect from
the host already.
Anything relying on KEEP_CONNECT will just have that
ignored, but we don't have proper hibernation
implementation yet, so there are no regressions.
In any case, hibernation is only useful for runtime
PM, not system sleep.
While at that, also remove dwc3.dcfg which has been
rendered unnecessary.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Felipe Balbi [Wed, 4 May 2016 12:49:37 +0000 (15:49 +0300)]
usb: dwc3: gadget: re-factor ->udc_start and ->udc_stop
we will be re-using it for suspend/resume, so
instead of duplicating code, let's just re-factor
the functions so they can be re-used.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Tim Harvey [Mon, 23 May 2016 13:58:41 +0000 (06:58 -0700)]
usb: gadget: net2280: add USB2380 support
The PLX USB2380 is a PCIe version of the NET2280 and behaves more like the
USB338x but without the USB3.0 superspeed support.
This was tested with g_ether, g_serial, g_mass_storage on a Gateworks
Ventana GW2383.
Cc: Justin DeFields <justindefields@gmail.com>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>