treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Add super speed support ...

This adds the missing bits and pieces to add super speed support to the
USB stack. It is based on the corresponding U-Boot code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: factor out a usb_setup_descriptor() function ...

This factors out a usb_setup_descriptor() function with the goal to
make the code better comparable to the corresponding U-Boot code.

This also incorporates this U-Boot commit:

| commit 2b338ef
| Author: Hans de Goede <hdegoede@redhat.com>
| Date:   Tue May 5 23:56:04 2015 +0200
|
|     usb: Fix maxpacketsize for first descriptor read for low-speed usb devs
|
|     This fixes descriptor reading of lowspeed devices through ohci not working.
|
|     Signed-off-by: Hans de Goede <hdegoede@redhat.com>
|     Acked-by: Marek Vasut <marex@denx.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: remove unnecessary variable ...

"tmp" is only used to store the size of the descriptor. The name is not
very meaningful and "tmp" is not even used everywhere it could be used.
Just replace by using sizeof() directly where needed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Assign dev_index once ...

dev->devnum is set once in usb_alloc_new_device(), set to 0 again later
in usb_new_device() and then set back to the original value. This seems
unnecessary, just set devnum once right before calling usb_set_address()
on the device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: support set hub depth request for USB 3.0 hubs ...

This is an adoption of U-Boot commit bbc6f06:

| commit bbc6f06
| Author: Bin Meng <bmeng.cn@gmail.com>
| Date:   Wed Jul 19 21:51:13 2017 +0800
|
|     usb: hub: Support 'set hub depth' request for USB 3.0 hubs
|
|     USB 3.0 hub uses a hub depth value multiplied by four as an offset
|     into the 'route string' to locate the bits it uses to determine the
|     downstream port number. We shall set the hub depth value of a USB
|     3.0 hub after it is configured.
|
|     Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
|     Reviewed-by: Simon Glass <sjg@chromium.org>

In this patch we also support recording the depth of a hub in
struct usb_device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: host: make init hook optional ...

For controllers which do everything relevant during probe time
make the init hook optional.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Use dev_* ...

Give the USB messages some context by using dev_* functions rather than
printf()/debug().

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Set new USB device name earlier ...

in usb_new_device() set the device name as early as possible to let
dev_* functions print a meaningful name.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: hub: do not reset devices twice ...

U-Boot has this since 3ed9eb93c2 ("usb: Don't reset the USB hub a 2nd
time"), so do the same for barebox.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Forward error code from usb_set_configuration ...

Instead of returning -1 forward the error code and take the opportunity
to print the error string.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Make timeout unit clear ...

The usb_*_msg() functions take a timeout parameter. Make clear which
unit is expected by adding a _ms suffix to the variable name.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Drop usb_disable_asynch() ...

There are no users of usb_control_msg() in the codebase that pass
timeout of 0, so it doesn't look like usb_disable_asynch() has any
effect on USB operation. Drop that function and remove all of its uses
to simplify things.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/usb'

usb: Add usb_unregister_host() ...

We have usb_register_host() which puts a new host on the list
of hosts we should also have the opposite which removes the
host from the list again.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers: Introduce dev_set_name() ...

Introduce dev_set_name() in order to hide implementation details of
setting device's name so it'd be easier to change it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

USB: host: hub: Adjust device speed after every port reset ...

To account for the possibility of a device coming out of second reset
operating at different speed compared to first, move the code that
stores device speed to be a part of hub_port_reset(). This way any
speed change happening as a result of port reset could be accounted
for.

The above behaviour was observed on i.MX51 ZII RDU1, on USBH2 port
connected to SMSC2660 USB Hub/SD card reader. For reasons unclear,
first reset would put it into Full Speed mode whereas second would
result in switch to High Speed. Artifically disabling second reset
would result in the device operating at Full Speed.

Not doing second speed adjustement on that board result would result
in un-processed control transfer and failure to execute
usb_set_address().

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

param: make parameter functions more consistent ...

This patch creates a consitent set of device parameter functions.

With this we have: dev_add_param_<type><access>

"type" is one of: int32, uint32, int64, uint64, string, mac, ipv4, enum, bitmask
The improvement here is that we now can exactly specify the width of the
int type parameters and also correctly distinguish between signed and
unsigned variables which means that a variable no longer ends up with
INT_MAX when it's assigned -1.

"access" can be empty for regular read/write parameter, "_ro" for readonly
parameters which get their value from a variable pointer in the
background or "_fixed" for parameters which are set to a fixed value
(without a pointer in the background).

Some more exotic types are not (yet) implemented, like
dev_add_param_ip_ro.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: Use standard debug macro ...

Use standard pr_debug instead of homebrew USB_PRINTF

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: core: return -EAGAIN on usb_* functions reentrance ...

Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: core: drop unnecessary le16_to_cpu() conversion ...

In drivers/usb/core/usb.c we already have le16_to_cpus() conversion
just after usb_get_descriptor():

    390     /* correct le values */
    391     le16_to_cpus(&dev->descriptor->bcdUSB);
    392     le16_to_cpus(&dev->descriptor->idVendor);
    393     le16_to_cpus(&dev->descriptor->idProduct);
    394     le16_to_cpus(&dev->descriptor->bcdDevice);

so no additional idVendor/idProduct descriptor fields
le16_to_cpu() conversion is needed after that.

On the big-endian machines extra le16_to_cpu() conversion
leads to wrong idVendor/idProduct USB device parameters values
(e.g. see devinfo <usb-device> output), and to a much more
serious problem: idVendor/idProduct-based USB device detection
does not work.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: ehci: fix include/usb/usb.h:'struct usb_configuration' misuse ...

See the commit

    commit 245069b
    Author: Sascha Hauer <s.hauer@pengutronix.de>
    Date:   Thu Jul 10 11:36:12 2014 +0200

        USB: introduce usb_interface/usb_configuration structs

On little endian systems like ARM the le16_to_cpus() macro
is a no op, defined as:

    #define le16_to_cpus __le16_to_cpus
    #define __le16_to_cpus(x) do {} while (0)

So struct usb_configuration field misuse was discovered
on big-endian MIPS machine.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: increase USB_CNTL_TIMEOUT to match linux ...

USB requests should be processed within a timeframe of 5s.
The linux kernel also uses this timeout value for the control packets.

For the musb the increase in timeout helps successfully probing USB devices
(at least on one test hardware), but on the other hand doesn't slow down the
system, if there are no devices, i.e. the timeout never hits. That means,
that the USB core correctly aborts instead of timing out.
Why and how the 100ms was chosen in the first place, can not be deduced from
the git history, just that it seems to work fine for most boards.

Change USB_CNTL_TIMEOUT to 5000ms and replace all occurences of
	`USB_CNTL_TIMEOUT * x`
with just
	`USB_CNTL_TIMEOUT`,
as the timeout is now large enough without it.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

usb: abolish wait_ms() function ...

This function is only used in drivers/usb/*.
It is equivalent to mdelay().

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/usb-host' ...

Conflicts:
	drivers/usb/core/Makefile

USB: improve error paths and tear-down ...

USB core isn't too strict about allocation/deallocation and
add/remove sequences of usb devices. Especially, error paths
and device tear-down are kind of broken and cause hangs on
failing usb device detect.

This patch improves the situation by introducing a
usb_free_device() that tears down allocated resources by
usb_alloc_new_device(). usb_remove_device() now only deals
with resources that have been added by usb_new_device().
Also, error handling is fixed or improved to ensure that no
devices are unregistered that have not been previously
registered.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

USB: Count detected USB devices independent of dev_index ...

Adding a usb device increases dev_index every time a new device is
allocated. Removing a usb device does not decrease again, of course.
As we print the number of detected usb devices after each usb bus
scan based on dev_index, we cannot trust dev_index here. Keep track
of the correct number of (currently) detected usb devices by
introducing an independent dev_count that gets increased on detect
and decreased on remove.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

USB: Fix stale usb devices in usb_device_list ...

New usb devices are added to a list of usb devices, but when removing
the corresponding usb_device it was not removed from that list. Fix it
by deleting it properly from the usb_device_list.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

USB: gadget: Update to 3.15 ...

This updates the USB Gadget stack to Linux-3.15.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Conflicts:
	drivers/usb/core/Makefile

USB: host: drop force rescan ...

We can now detect changes in the USB device hierarchy properly, so
the 'force' option to the usb command is no longer necessary. We just
scan the busses each time the usb command is called.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>