Intensive tests with USB audio devices connected to a musb host port
have shown reproducible pops and clicks in both the playback and the
capture stream.

These are related to how the early_tx hrtimer is set up, and it turns
out they can be fixed by reducing the timer's slack value from 40 to
25 us. Also, when the callback is ran without taking action, it should
be rescheduled 20 us later instead of 50 us.
Reported-and-tested-by: NSven Neumann <neumann@teufel.de>
Signed-off-by: NDaniel Mack <daniel@zonque.org>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch adds the ST glue logic to manage the DWC3 HC
on STiH407 SoC family. It manages the powerdown signal,
and configures the internal glue logic and syscfg registers.

[ balbi@ti.com : actually switch over to of_platform_depopulate() ]
Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: NPeter Griffin <peter.griffin@linaro.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

When we're debugging hard-to-reproduce and time-sensitive
use cases, printk() poses too much overhead. That's when
the kernel's tracing infrastructure comes into play.

This patch implements a few initial tracepoints for the
dwc3 driver. More traces can be added as necessary in order
to ease the task of debugging dwc3.
Reviewed-by: NPaul Zimmerman <paulz@synopsys.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

No functional changes, just making sure we're dealing
with unsigned ints.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

this new helper will return a pretty string for
DWC3 Gadget Events.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Those functions are only using within debugging
messages, grouping them into debug.h makes sense.

While at that, also add missing multiple inclusion
guard.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The UAC2 function driver currently responds to all packets at all times
with wMaxPacketSize packets. That results in way too fast audio
playback as the function driver (which is in fact supposed to define
the audio stream pace) delivers as fast as it can.

Fix this by sizing each packet correctly with the following steps:

 a) Set the packet's size by dividing the nominal data rate by the
    playback endpoint's interval.

 b) If there is a residual value from the calculation in a), add
    it to a accumulator to keep track of it across packets.

 c) If the accumulator has gathered at least the number of bytes
    that are needed for one sample frame, increase the packet size.

This way, the packet size calculation will get rid of any kind of
imprecision that would otherwise occur with a simple division over
time.

Some of the variables that are needed while processing each packet
are pre-computed for performance reasons.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

With packet sizes other than 512, payloads in the packets may wrap
around the ALSA dma buffer partially, which leads to memory corruption
and audible clicks and pops in the audio stream at the moment, because
there is no boundary check before the memcpy().

In preparation to an implementation for smaller and dynamically sized
packets, we have to address such cases, and copy the payload in two
steps conditionally.

The 'src' and 'dst' approach doesn't work here anymore, as different
behavior is necessary in playback and capture cases. Thus, this patch
open-codes the routine now.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Add a simple container_of() wrapper to get a struct f_uac2_opts from a
struct struct audio_dev. Use it in two places where it is currently
open-coded.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

In afunc_bind() and afunc_set_alt(), &uac2->pdev.dev are used multiple
times. Adding a short-hand for them makes lines shorter so we can
remove some line wraps.

No functional change.
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Restructure some code to make it easier to read.

While at it, return -ENOMEM instead of -EINVAL if
usb_ep_alloc_request() fails, and omit the logging in such cases
(the mm core will complain loud enough).
Signed-off-by: NDaniel Mack <zonque@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Flatten the start_transfer function by reversing the if condition and
returning early out of the function if everything went fine.  It makes
the function look less complicated, at least to me, and easier to
understand.
Signed-off-by: NMichal Nazarewicz <mina86@mina86.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

commit f2267089(usb: gadget: composite: dequeue cdev->req before free it in
composite_dev_cleanup) fixed a bug: free the usb request(i.e. cdev->req) but
does not dequeue it beforehand. This fix is not proper enough because it
dequeues the request after free its data buffer, considering the hardware can
access the buffer's memory anytime before the request's complettion rountine
runs, and usb_ep_dequeue always call the complettion rountine before it returns,
so the best way is to dequeue the request before free its buffer.
Suggested-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NLi Jun <b47624@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

It's not being used any longer.
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If NO_DMA=y:

drivers/built-in.o: In function `usbhsg_dma_map_ctrl':
mod_gadget.c:(.text+0x53b226): undefined reference to `usb_gadget_map_request'
mod_gadget.c:(.text+0x53b242): undefined reference to `usb_gadget_unmap_request'
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-samsung-usb[2,3] drivers got replaced by
drivers/phy/phy-samsung-usb[2,3] ones and the old common Samsung
USB PHY code is no longer used.
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NVivek Gautam <gautam.vivek@samsung.com>
Reviewed-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>
Cc: Kamil Debski <k.debski@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-samsung-usb3 driver got replaced by
drivers/phy/phy-samsung-usb3 one and is no longer used.
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NVivek Gautam <gautam.vivek@samsung.com>
Reviewed-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>
Cc: Kamil Debski <k.debski@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/phy/phy-samsung-usb2 driver got replaced by
drivers/phy/phy-samsung-usb2 one and is no longer used.
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NVivek Gautam <gautam.vivek@samsung.com>
Reviewed-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>
Cc: Kamil Debski <k.debski@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Using $(PWD) breaks builds when make was invoked from outside
of the kernel tree.
Signed-off-by: NYegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch introduces the use of the functions usb_endpoint_type and
usb_endpoint_num.

The Coccinelle semantic patch that makes these changes is as follows:

@@ struct usb_endpoint_descriptor *epd; @@

- (epd->bEndpointAddress & \(USB_ENDPOINT_NUMBER_MASK\|0x0f\))
+ usb_endpoint_num(epd)

@@ struct usb_endpoint_descriptor *epd; @@

- (epd->bmAttributes & \(USB_ENDPOINT_XFERTYPE_MASK\|3\))
+ usb_endpoint_type(epd)
Signed-off-by: NHimangi Saraogi <himangi774@gmail.com>
Acked-by: NJulia Lawall <julia.lawall@lip6.fr>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Two simple test cases for interrupt endpoints are added to the usbtest.c file.
These are simple non-queued interrupt IN and interrupt OUT transfers. Currently,
only gadget zero is capable of executing the interrupt EP test cases. However,
extending the same to other gadgets is extremely simple and can be done
on-demand.

The two new tests added are
  - Test 25: To verify Interrupt OUT transfer
  - Test 26: To verify Interrupt IN transfer

Since the default value of wMaxPacketSize is set as 1024, so interrupt
IN transfers must be specified with the size parameter = multiple of
1024. Otherwise the default value (512) in the usbtest application fails
the transfer. See [RUN 4] for sample logs

The application logs (usbtest) and corresponding kernel logs are as
following:

[Run 1]
./testusb -a -c 10 -s 2048 -t 26 -v 511
usbtest 7-1:3.0: TEST 26: read 2048 bytes 10 times

[Run 2]
./testusb -a -c 10 -s 1024 -t 25 -v 511
usbtest 7-1:3.0: TEST 25: write 1024 bytes 10 times

[Run 3]
./testusb -a -c 10 -s 1098 -t 25 -v 511
usbtest 7-1:3.0: TEST 25: write 1098 bytes 10 times

[Run 4 - Failure case scenario]
./testusb -a  -t 26
unknown speed   /dev/bus/usb/007/004    0
/dev/bus/usb/007/004 test 26 --> 75 (Value too large for defined data type)

usbtest 7-1:3.0: TEST 26: read 512 bytes 1000 times
usb 7-1: test26 failed, iterations left 999, status -75 (not 0)
Signed-off-by: NAmit Virdi <amit.virdi@st.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Interrupt endpoints behave quite similar to the bulk endpoints with the
difference that the endpoints expect data sending/reception request at
particular intervals till the whole data has not been transmitted.

The interrupt EP support is added to gadget zero. A new alternate setting (=2)
has been added. It has 2 interrupt endpoints. The default parameters are set as:
	bInterval: 1 ms for FS and 8 uFrames (implying 1 ms) for HS/SS
	wMaxPacketSize: 64 bytes for FS and 1024 bytes for HS/SS
However, the same can be overridden through the module parameter interface.

The code is tested for HS and SS on a platform having DWC3 controller.
Signed-off-by: NAmit Virdi <amit.virdi@st.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Remove the ttyGS PREFIX macro from u_serial.c and replace all occurences with
the hardcoded ttyGS string.

This macro was mostly used in a few debug/warning messages and a lot of
hardcoded ttyGS existed beneath. It may have been used for renaming the
tty, but if done so most debug messages would have ignored this.

Due to the fact the usage of this PREFIX in all debug calls would have
resulted in a hard to read/grep code it is removed completely.
Signed-off-by: NRichard Leitner <richard.leitner@skidata.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Replace the VDBG and DBG macro with the kernels "proper" debug macros
(dev_vdbg and dev_dbg) in f_acm.c, f_obex.c & f_serial.c
Signed-off-by: NRichard Leitner <richard.leitner@skidata.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch makes the phy reset clk and reset line optional as this clk
is not available on boards like IFC6410 with APQ8064.

phy-reset clk is only used as argument to the mach level callbacks, so
this patch adds condition before clk_get calls so that the driver
wouldn't fail on SOCs which do not have this support.
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This adds support for the USB PHY in Vybrid VF610. We assume that
the disconnection without VBUS is also needed for Vybrid.

Tests showed, without MXS_PHY_NEED_IP_FIX, enumeration of devices
behind a USB Hub fails with errors:

[  215.163507] usb usb1-port1: cannot reset (err = -32)
[  215.170498] usb usb1-port1: cannot reset (err = -32)
[  215.185120] usb usb1-port1: cannot reset (err = -32)
[  215.191345] usb usb1-port1: cannot reset (err = -32)
[  215.202487] usb usb1-port1: cannot reset (err = -32)
[  215.207718] usb usb1-port1: Cannot enable. Maybe the USB cable is bad?
[  215.219317] usb usb1-port1: unable to enumerate USB device

Hence we also enable the MXS_PHY_NEED_IP_FIX flag.
Acked-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

As the driver is in mainline we can remove the version numbers.
Signed-off-by: NMichael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

If uvc->control_buf is successfuly allocated but uvc->control_req
is not, uvc->control_buf is not freed in the error recovery path.
With this patch applied uvc->control_buf is freed unconditionally;
if it happens to be NULL kfree on it is safe anyway.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Activate the videobuf2 DMABUF support. As vb2-vmalloc supports the
importer role only, exporting buffers isn't supported yet. When the
exporter role will be implemented in vb2-vmalloc the UVC gadget driver
will automatically gain support for it.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The disconnect of the USB Device is a common pattern for
an UVC Camera. In many cases this will give us an meaningless
information for all buffers that couldn't be enqueued.
That patch changes this to KERN_DEBUG.
Signed-off-by: NMichael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Add support for using f_uac1 function as a component of a gadget
composed with configfs.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

When configfs support is added the values in question will have to be
used in two different places. Substitute them with defined constants
to avoid duplicating magic numbers.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Use the new usb_gstring_attach interface.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

There are no users of the old interface left, so it can be removed.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Use the new interface so that the old one can be removed.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Converting uac1 to the new function interface requires converting
the USB uac1's function code and its users.

This patch converts the f_uac1.c to the new function interface.

The file is now compiled into a separate usb_f_uac1.ko module.

The old function interface is provided by means of a preprocessor
conditional directives. After all users are converted, the old interface
can be removed.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Integrating configfs requires converting f_uac1 to new function interface,
which in turn requires converting it to the new function interface,
which involves separate compilation of f_uac1.c into usb_f_uac1.ko.
u_uac1.c contains some module parameters. After this patch is applied
they are still a part of the resulting g_audio.ko, but can be guarded
with a compatiblity flag which will be removed when no users of the old
function interface of f_uac1 are left.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

uac1 function is missing strings. Add them.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Add support for using f_uac2 function as a component of a gadget
composed with configfs.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

When configfs is integrated the same values will have to be used
as defaults. Use symbolic names in order not to duplicate magic numbers.
Tested-by: NSebastian Reimers <sebastian.reimers@googlemail.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>