Move CONFIG_SYS_NS16550 to Kconfig, and run moveconfig.py.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>

Zap CONFIG_NS16550_SERIAL, as the unification of ns16550 drivers
is completed.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

Unify serial_omap, and use the generic binding.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>

Unify serial_tegra, and use the generic binding.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>

Unify serial_dw, and use the generic binding.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>

Unify serial_keystone, and use the generic binding.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>

Unify serial_rockchip, and use the generic binding.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
Acked-by: Simon Glass <sjg@chromium.org>

Unify serial_ppc, and use the generic binding.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Add TODO comment]
Signed-off-by: Tom Rini <trini@konsulko.com>

Unify serial_x86, and use the generic binding.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

Add generic binding to unify ns16550 drivers. There are
several drivers using almost the same code, such as serial_dw,
serial_keystone, serial_omap, serial_ppc, serial_rockchip,
serial_tegra.c, and serial_x86. But each is platform specific.

The key difference between these drivers is the way to get
input clock frequency. With this unified approach, fixed clock
frequency should be extracted from "clock-frequency" property of
device tree blob. If this property is not available, the macro
CONFIG_SYS_NS16550_CLK will be used. It can be a constant or a
function to get clock, eg, get_serial_clock().

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Simon Glass <sjg@chromium.org>

Change map_sysmem() to map_physmem(,,MAP_NOCACHE). Though map_sysmem()
can be used to map system memory, it might be wrong to use it for I/O
ports.  The map_physmem() serves the same purpose to translate physical
address to virtual address with the additional flag to take care of cache
property. Most drivers use map_physmem() since I/O ports access should be
uncached. As ns16550 is a driver, it should use map_physmem() rather
than map_sysmem().

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Simon Glass <sjg@chromium.org>

Since commit 220e8021 ("nios2: convert altera_jtag_uart to
driver model"), the default debug uart was changed. Most people
use ns16550 UART, so restore it as default.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reported-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Reported-by: Ariel D'Alessandro <ariel@vanguardiasur.com.ar>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Simon Glass <sjg@chromium.org>

Add a README with a brief guide to porting serial drivers over to use
driver model.

Add a timeline also. All serial drivers should be converted by the end
of January 2016.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a test that verifies that USB keyboards work correctly on sandbox.
This verifies some additional parts of the USB stack.

Signed-off-by: Simon Glass <sjg@chromium.org>

Enable the USB keyboard on sandbox, now that we have a suitable emulation
driver.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a simple USB keyboard driver for sandbox. It provides a function to
'load' it with input data, which it will then stream through to the normal
U-Boot input subsystem. When the input data is exhausted, the keyboard stops
providing data.

Signed-off-by: Simon Glass <sjg@chromium.org>

Allow USB device emulation to support interrupt URBs so that we can use USB
keyboards with sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>

Replace the open-coded values with constants to make it clearer what they
mean.

Signed-off-by: Simon Glass <sjg@chromium.org>

This was missed in the conversion to driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add tests that 'usb tree' produces the right output when a device changes
order on the bus.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add tests that this command produces the right output, even when a rescan
results in a device disappearing from the bus.

Signed-off-by: Simon Glass <sjg@chromium.org>

Each scan of the USB bus may return different results. Existing driver-model
devices are reused when found, but if a device no longer exists it will stay
around, de-activated, but bound.

Detect these devices and remove them after the scan completes.

Signed-off-by: Simon Glass <sjg@chromium.org>

This function should not be used with driver model. While there are users
of USB Ethernet that use driver model for USB but not Ethernet, we have
to keep it around. Add a comment to that effect.

Signed-off-by: Simon Glass <sjg@chromium.org>

This reverts commit bb52b367.

Signed-off-by: Simon Glass <sjg@chromium.org>

This reverts commit 6cda3695.

We want to avoid having the USB stack rely on unbind.

Signed-off-by: Simon Glass <sjg@chromium.org>

This reverts commit 9b510df7.

We want to avoid having the USB stack rely on unbind.

Signed-off-by: Simon Glass <sjg@chromium.org>

Each USB device has an emulator. Currently this can only be found by
supplying the 'pipe' value, which contains the device number. Add a way
to find it directly from the emulated device.

Signed-off-by: Simon Glass <sjg@chromium.org>

To support more advanced testing, support 4 devices instead of 2.

Signed-off-by: Simon Glass <sjg@chromium.org>

We would like the serial number to come from the device tree node name of
the emulated device. This avoids them all having the same name. Adjust the
code to support this.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add iteration macros which support unbinding a device within the loop.

Signed-off-by: Simon Glass <sjg@chromium.org>

Allow the 'usb tree' command to be used from test code, so that we can
verify that it works correctly.

Signed-off-by: Simon Glass <sjg@chromium.org>

When running sandbox tests, silence the console to avoid unwanted output.
Also, record the console in case tests want to check it.

The -v option can be used to enable stdout during tests.

Signed-off-by: Simon Glass <sjg@chromium.org>

Allow console recording so that tests can use it. Also allow the console
output to be suppressed, to reduce test output 'noise'.

Signed-off-by: Simon Glass <sjg@chromium.org>

It is useful to be able to record console output and provide console input
via a buffer. This provides sandbox with the ability to run a command and
check its output. If the console is set to silent then no visible output
is generated.

This also provides a means to fix the problem where tests produce unwanted
output, such as errors or warnings. This can be confusing. We can instead
set the console to silent and record this output. It can be checked later
in the test if required.

It is possible that this may prove useful for non-test situations. For
example the console output may be suppressed for normal operations, but
recorded and stored for access by the OS. That feature is not implemented
at present.

Signed-off-by: Simon Glass <sjg@chromium.org>

This will be used to support console recording. It provides for a circular
buffer which can be written at the head and read from the tail. It supports
avoiding data copying by providing raw access to the data.

Signed-off-by: Simon Glass <sjg@chromium.org>

Since common.h will always include this automatically, it is not needed.

Signed-off-by: Simon Glass <sjg@chromium.org>

The console includes a global variable and several functions that are only
used by a small subset of U-Boot files. Before adding more functions, move
the definitions into their own header file.

Signed-off-by: Simon Glass <sjg@chromium.org>

Currently the USB tests take around two seconds to run. Remove these
unnecessary time delays so that the tests run quickly.

Signed-off-by: Simon Glass <sjg@chromium.org>

Some tests are slow due to delays which are unnecessary on sandbox. The
worst offender is USB where we lose two seconds. Add a way to disable time
delays.

Signed-off-by: Simon Glass <sjg@chromium.org>

Building with gcc-5.2 raises this warning:

drivers/misc/cros_ec_sandbox.c: In function cros_ec_sandbox_packet:
drivers/misc/cros_ec_sandbox.c:483:5: warning: len may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (len < 0)
     ^

If the function process_cmd() is called with
req_hdr->command == EC_CMD_ENTERING_MODE, the value of len will be
returned uninitialized.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>