Add dwc2_check_param_tx_fifo_sizes function which validates
the members of g_tx_fifo_size array and sets to average or
default values if it is needed.

Cc: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Remove legacy DWC2_G_P_LEGACY_TX_FIFO_SIZE array for TX FIFOs.
Update dwc2_set_param_tx_fifo_sizes function to calculate
and assign default average FIFO depth to each member of
g_tx_fifo_size array. Total FIFO size, EP Info block's size,
FIFO operation mode and device operation mode are taken into
consideration during the calculation.

Cc: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

GDFIFOCFG is available from IP version 2.91a. Fix the code to reflect
this.
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

ulseep_range() uses hrtimers and provides no advantage over msleep()
for larger delays. Fix up the 100ms delays here passing the adjusted "min"
value to msleep(). This helps reduce the load on the hrtimer subsystem.

Link: http://lkml.org/lkml/2017/1/11/377
Fixes: commit 2938fc63 ("usb: dwc2: Properly account for the force mode delays")
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

The Hi6220's usb controller is limited in that it does not
support "Split Transactions", so it does not support communicating
with low-speed and full-speed devices behind a high-speed hub.

Thus it requires a quirk so that we can manually drop the usb
speed when low/full-speed are attached, and bump back to high
speed when they are removed.

Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Vardan Mikayelyan <mvardan@synopsys.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Chen Yu <chenyu56@huawei.com>
[jstultz: Reworked to simplify the patch, and made
 commit log to be more specific about the issue]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

We've seen failures when switching between host and gadget mode,
which was diagnosed as being caused due to the bus being
auto-suspended when we switched.

So this patch forces a port resume when switching to device
mode if the bus is suspended.

Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Vardan Mikayelyan <mvardan@synopsys.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Chen Yu <chenyu56@huawei.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

When removing a USB-A to USB-otg adapter cable, we get a change status
irq, and then in dwc2_conn_id_status_change, we erroneously see the
GOTGCTL_CONID_B flag set. This causes us to get stuck in the
"while (!dwc2_is_device_mode(hsotg))" loop, spitting out "Waiting for
Peripheral Mode, Mode=Host" warnings until it fails out many seconds
later.

This patch works around the issue by re-reading the GOTGCTL state to
check if the GOTGCTL_CONID_B is still set and if not restarting the
change status logic.

Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Vardan Mikayelyan <mvardan@synopsys.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Reviewed-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Basically when plugging in various cables in different orders, I'm
occasionally seeing the following BUG splat:

[   86.215403] BUG: scheduling while atomic: kworker/u16:2/53/0x00000002
[   86.219164] usb 1-1: USB disconnect, device number 9
[   86.226845] Preemption disabled at:[   86.230218]
[<ffffff8008673558>] dwc2_conn_id_status_change+0x120/0x250
[   86.236894] CPU: 0 PID: 53 Comm: kworker/u16:2 Tainted: G        W
     4.9.0-rc8-00051-gd5a7979-dirty #1702
[   86.246836] Hardware name: HiKey Development Board (DT)
[   86.252100] Workqueue: dwc2 dwc2_conn_id_status_change
[   86.257279] Call trace:
[   86.259771] [<ffffff8008087c28>] dump_backtrace+0x0/0x1a0
[   86.265210] [<ffffff8008087ddc>] show_stack+0x14/0x20
[   86.270308] [<ffffff80084343f0>] dump_stack+0x90/0xb0
[   86.275401] [<ffffff80080d8d94>] __schedule_bug+0x6c/0xb8
[   86.280841] [<ffffff8008a07220>] __schedule+0x4f8/0x5b0
[   86.286099] [<ffffff8008a073e8>] schedule+0x38/0xa0
[   86.291017] [<ffffff8008a0a6cc>] schedule_hrtimeout_range_clock+0x8c/0xf0
[   86.297846] [<ffffff8008a0a740>] schedule_hrtimeout_range+0x10/0x18
[   86.304150] [<ffffff8008a0a4a0>] usleep_range+0x50/0x58
[   86.309418] [<ffffff800866d8dc>] dwc2_wait_for_mode.isra.4+0x54/0xd0
[   86.315815] [<ffffff800866f058>] dwc2_core_reset+0xe0/0x168
[   86.321431] [<ffffff800867e364>] dwc2_hsotg_core_init_disconnected+0x2c/0x310
[   86.328602] [<ffffff8008673568>] dwc2_conn_id_status_change+0x130/0x250
[   86.335254] [<ffffff80080ccd48>] process_one_work+0x118/0x370
[   86.341035] [<ffffff80080ccfe8>] worker_thread+0x48/0x498
[   86.346473] [<ffffff80080d2eb0>] kthread+0xd0/0xe8
[   86.351299] [<ffffff8008082e80>] ret_from_fork+0x10/0x50

This seems to be caused by the dwc2_wait_for_mode() calling
usleep_range() while the hstog->lock spinlock is held, since
we take that before calling dwc2_hsotg_core_init_disconnected().

This patch avoids the issue by adding an extra argument to
dwc2_core_reset(), as suggested by John Youn, which allows us to
skip the waiting, which should be unnecessary when calling from
dwc2_hsotg_core_init_disconnected().

Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Guodong Xu <guodong.xu@linaro.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Chen Yu <chenyu56@huawei.com>
Cc: Vardan Mikayelyan <mvardan@synopsys.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Show the value of dr_mode via a debufs file.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Remove debugging prints to show params.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Show the core params and hardware params.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Further reduce the set of parameters set by platforms. Many of them are
unnecessary as they should be reported by hardware. They should only
need to be overridden if there is a problem.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Check these parameters only for true or false. There is no need to check
for greater or less than 0.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Remove the platform-specific static param structs and set only those
params that are necessary for each platform.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Check that core parameters have valid values and adjust them if they
aren't.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Group the members by global, host, and gadget params. Formatting and
organizational change only.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Update the param types to appropriately sized ints and bools.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

After setting the default core parameter values, read in the device
properties and modify core parameter values if needed.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Initialize the core parameters to their default, auto-detected values.

Remove all the previous dwc2_set_param* methods. Most of what this code
is doing is handling defaults for "not set" values and other trivial
checks. The checking can be simplified and will be done in a later
commit.

This allows us to change only those parameters that won't work with
default settings. It also allows us to use non-int parameters.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

The otg_ver parameter only controls the SRP pulsing method and defaults
to the 1.3 behavior. It is unused and can be removed.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Since commit: ba1582f2 ("usb: gadget: f_hid: use alloc_ep_req()")
we cannot allocate any requests in bind() as we check if we should
align request buffer based on endpoint descriptor which is assigned
in set_alt().

Allocating request in bind() function causes a NULL pointer
dereference.

This commit moves allocation of IN request from bind() to set_alt()
to prevent this issue.

Fixes: ba1582f2 ("usb: gadget: f_hid: use alloc_ep_req()")
Cc: stable@vger.kernel.org
Tested-by: David Lechner <david@lechnology.com>
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Declare usb_ep_ops structures as const as they are only stored in the
ops field of an usb_ep structure. This field is of type const, so
usb_ep_ops structures having this property can be made const too.
Done using Coccinelle( A smaller version of the script)

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct usb_ep_ops i@p={...};

@ok@
identifier r.i;
position p;
struct mv_ep a;
struct mv_u3d_ep b;
struct omap_ep c;

@@
(
a.ep.ops=&i@p;
|
b.ep.ops=&i@p;
|
c.ep.ops=&i@p;

)

@bad@
position p!={r.p,ok.p};
identifier r.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
+const
struct usb_ep_ops i;

File size details before and after applying  the patch.
First line of every .o file shows the file size before patching and
second line shows the file size after patching.

  text	   data	    bss	    dec	    hex	filename

   7782	    384	      8	   8174	   1fee	usb/gadget/udc/fotg210-udc.o
   7878	    296	      8	   8182	   1ff6	usb/gadget/udc/fotg210-udc.o

  17866	    992	     40	  18898	   49d2	usb/gadget/udc/fsl_udc_core.o
  17954	    896	     40	  18890	   49ca	usb/gadget/udc/fsl_udc_core.o

   9646	    288	      8	   9942	   26d6	usb/gadget/udc/fusb300_udc.o
   9742	    192	      8	   9942	   26d6	usb/gadget/udc/fusb300_udc.o

  12752	    416	      8	  13176	   3378	drivers/usb/gadget/udc/goku_udc.o
  12832	    328	      8	  13168	   3370	drivers/usb/gadget/udc/goku_udc.o

  16541	   1696	      8	  18245	   4745	drivers/usb/gadget/udc/gr_udc.o
  16637	   1600	      8	  18245	   4745	drivers/usb/gadget/udc/gr_udc.o

  15798	    288	     16	  16102	   3ee6	drivers/usb/gadget/udc/m66592-udc.o
  15894	    192	     16	  16102	   3ee6	drivers/usb/gadget/udc/m66592-udc.o

  17751	   3808	     16	  21575	   5447	usb/gadget/udc/mv_u3d_core.o
  17839	   3712	     16	  21567	   543f	usb/gadget/udc/mv_u3d_core.o

  17348	   1112	     24	  18484	   4834	usb/gadget/udc/mv_udc_core.o
  17436	   1016	     24	  18476	   482c	usb/gadget/udc/mv_udc_core.o

  25990	   2620	     13	  28623	   6fcf	drivers/usb/gadget/udc/net2272.o
  26086	   2524	     13	  28623	   6fcf	drivers/usb/gadget/udc/net2272.o

  18409	   7312	      8	  25729	   6481	drivers/usb/gadget/udc/pxa27x_udc.o
  18505	   7208	      8	  25721	   6479	drivers/usb/gadget/udc/pxa27x_udc.o

  18644	    288	     16	  18948	   4a04	usb/gadget/udc/r8a66597-udc.o
  18740	    192	     16	  18948	   4a04	usb/gadget/udc/r8a66597-udc.o

Files: drivers/usb/gadget/udc/{s3c-hsudc.o/omap_udc.o/fsl_qe_udc.o} did
not complie.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

This patch updates the usb endpoint allocation scheme for atmel usba
driver to make sure all endpoints are allocated in order. This
requirement comes from the datasheet of the controller.

The allocation scheme is decided by fifo_mode parameter. For fifo_mode =
0 the driver tries to autoconfigure the endpoints fifo size. All other
modes contain fixed configurations optimized for different purposes. The
idea is somehow similar with the approach used on musb driver.
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

It is allowed by the USB specification to enabled same-address, opposite-
direction endpoints simultaneously, which means 30 non-zero endpoints
are allowed. So double eps_addrmap length to 30.
The original code only accepted 14 descriptors out of a likely intended 15
(as there are 15 endpoint addresses, ignoring direction), because the first
eps_addrmap entry is unused (it is a placeholder for endpoint zero). So
increase eps_addrmap length by one to 31.
Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Endpoint descriptors come in 2 sizes, struct usb_endpoint_descriptor being
the largest. Use bLength to stop on endpoint descriptor boundary, and not
2 bytes too far.
Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Since the set_power callback did not do anything for power setting,
then remove it.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Since it will not set the PMIC current drawn from USB configuration by
set_power callback, then remove it.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

There are no users will use the vbus_draw variable set by set_power()
callback to set the vbus current. Thus we can remove it.
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Add programming of GDFIFOCFG register in device mode.
It must contain start address for EP Info block and
total FIFO depth.
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

There are only two requests for uac2, it may not be enough at high
loading system which usb interrupt handler can't be serviced on
time, then the data will be lost since it is isoc transfer for audio.

In this patch, we introduce a parameter for the number for usb request,
and the user can override it if current number for request is not enough
for his/her use case.

Besides, update this parameter for legacy audio gadget and documentation.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Take the sizeof '*req' instead of 'struct dwc2_hsotg_req'.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

The function returns void so a return is unnecessary.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

The indent should be only one tab.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Fix lines over 80 characters.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

* Remove braces for one-line statements
* Add missing braces where another arm in if-statement uses braces
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Fix the formatting of logical statements to end the line with the
logical operator.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Fix misaligned and over 80-character comments.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

Fixes checkpatch warning:

WARNING: function definition argument 'struct dwc2_hsotg *' should also
have an identifier name
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

This commmit is the result of running checkpatch --fix.

The results were verified for correctness. Some of the fixes result in
line over 80 char which we will fix manually later.

The following is a summary of what was done by checkpatch:
* Remove externs on function prototypes.
* Replace symbolic permissions with octal.
* Align code to open parens.
* Replace 'unsigned' with 'unsigned int'.
* Remove unneccessary blank lines.
* Add blank lines after declarations.
* Add spaces around operators.
* Remove unnecessary spaces after casts.
* Replace 'x == NULL' with '!x'.
* Replace kzalloc() with kcalloc().
* Concatenate multi-line strings.
* Use the BIT() macro.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

As IN request has to be allocated in set_alt() and released in
disable() we cannot use mutex to protect it as we cannot sleep
in those funcitons. Let's replace this mutex with a spinlock.

Cc: stable@vger.kernel.org
Tested-by: David Lechner <david@lechnology.com>
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>