Commit graph

32 commits

Author SHA1 Message Date
Simon Glass
869588decd Convert CONFIG_SYS_STDIO_DEREGISTER to Kconfig
This converts the following to Kconfig:
   CONFIG_SYS_STDIO_DEREGISTER

This option should never be enabled in SPL, so use
CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER) when checking the option.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Re-sync]
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-10-23 18:34:17 -04:00
Simon Glass
b484b0daef dm: serial: Add support for of-platdata
When this feature is enabled, we cannot access the device tree to find out
which serial device to use. Just use the first serial driver we find.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Simon Glass
e4d6ab0c2c x86: Allow use of serial soon after relocation
At present on x86 machines with use cache-as-RAM, the memory goes away just
before board_init_r() is called. This means that serial drivers are
no-longer unavailable, until initr_dm() it called, etc.

Any attempt to use printf() within this period will cause a hang.

To fix this, mark the serial devices as 'unavailable' when it is no-longer
available. Bring it back when serial_initialize() is called. This means that
the debug UART will be used instead for this period.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-03-17 10:27:24 +08:00
Alison Wang
c5917b4b05 dm: serial-uclass: Move a carriage return before a line feed
In general, a carriage return needs to execute before a line feed. The
patch is to change serial DM driver serial-uclass.c based on this rule.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2016-03-14 15:34:50 -06:00
Simon Glass
92c55b682c dm: serial: Allow the UART driver to be dropped from the image
In very very space-constrained devices even the full UART driver is too
large. In this case the debug UART can still be used in some cases.

Add options to enable the UART driver in SPL and U-Boot proper. Enable both
options by default.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Thomas Chou <thomas@wytron.com.tw>
2016-01-12 10:19:09 -07:00
Stefan Roese
eb623b98c9 dm: serial: Minor coding style cleanup of some comments
Fix incorrect comment alignments.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-12-10 20:42:03 -07:00
Simon Glass
6bdc593e96 dm: serial: Deal with stdout-path with an alias
Sometimes stdout-path contains a UART alias along with speed, etc. For
example:

	stdout-path = "serial0:115200n8";

Add support for decoding this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2015-11-04 14:49:52 +01:00
Masahiro Yamada
0f9258228e of: clean up OF_CONTROL ifdef conditionals
We have flipped CONFIG_SPL_DISABLE_OF_CONTROL.  We have cleansing
devices, $(SPL_) and CONFIG_IS_ENABLED(), so we are ready to clear
away the ugly logic in include/fdtdec.h:

 #ifdef CONFIG_OF_CONTROL
 # if defined(CONFIG_SPL_BUILD) && !defined(SPL_OF_CONTROL)
 #  define OF_CONTROL 0
 # else
 #  define OF_CONTROL 1
 # endif
 #else
 # define OF_CONTROL 0
 #endif

Now CONFIG_IS_ENABLED(OF_CONTROL) is the substitute.  It refers to
CONFIG_OF_CONTROL for U-boot proper and CONFIG_SPL_OF_CONTROL for
SPL.

Also, we no longer have to cancel CONFIG_OF_CONTROL in
include/config_uncmd_spl.h and scripts/Makefile.spl.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2015-08-18 13:46:05 -04:00
Hans de Goede
8c4585881d dm: serial: Add a REQUIRE_SERIAL_CONSOLE option for boards with no serial port
Currently the serial code assumes that there is always at least one serial
port (and panics / crashes due to null pointer dereferences when there is
none).

This makes it impossible to use u-boot on boards where there is no (debug)
serial port, because e.g. all uart pins are muxed to another function.

This commit adds a CONFIG_REQUIRE_SERIAL_CONSOLE Kconfig option, which
defaults to y (preserving existing behavior), which can be set to n on
such boards to make them work.

This commit only implements this for CONFIG_DM_SERIAL=y configs, as allowing
running without a serial port for CONFIG_DM_SERIAL=n configs is non trivial,
and is not necessary at this moment.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-08-10 07:01:28 -06:00
Simon Glass
753812cb2e dm: serial: Correct logic in serial_find_console_or_panic()
In a final attempt to find a console UART this function uses the first
first available serial device. However the check for a valid device is
inverted.

This code is only executed when there is in fact no serial UART, but at
present it can fail to reach the panic_str() call in this case, and start
trying to use a non-existent UART.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-08-05 08:42:40 -06:00
Simon Glass
af28224546 sandbox: Move CONFIG_SANDBOX_SERIAL to Kconfig
Move this over to Kconfig and tidy up.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-06-10 19:26:55 -06:00
Simon Glass
e9fc058314 dm: serial: Don't support CONFIG_CONS_INDEX with device tree
This feature should be deprecated for new boards, and significantly adds
to SPL code size. Drop it. Instead, we can use stdout-path in the /chosen
node.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-06-10 19:26:55 -06:00
Simon Glass
66312374dc dm: Add a panic_str() function to reduce code size
The printf() in panic() adds about 1.5KB of code size to SPL when compiled
with Thumb-2. Provide a smaller version that does not support printf()-style
arguments and use it in two commonly compiled places.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-04-23 09:05:52 -06:00
Simon Glass
e564f054af dm: core: Add dev_get_uclass_priv() to access uclass private data
Add a convenience function to access the private data that a uclass stores
for each of its devices. Convert over most existing uses for consistency
and to provide an example for others.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-04-16 19:27:42 -06:00
Masahiro Yamada
891ee87e2b dm: serial: remove bogus include <ns16550.h>
Serial-uclass should be generically implemented without depending
a particular hardware.  Fortunately, nothing in include/ns16550.h is
referenced from drivers/serial/serial-uclass.c, so remove this bogus
include.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-03-25 16:33:27 -06:00
Michal Simek
484fdf5ba0 dm: Add support for all targets which requires MANUAL_RELOC
Targets with CONFIG_NEEDS_MANUAL_RELOC do not use REL/RELA
relocation (mostly only GOT) where functions aray are not
updated. This patch is fixing function pointers for DM core
and serial-uclass to ensure that relocated functions are called.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-02-12 15:17:29 -07:00
Simon Glass
9cc36a2b89 dm: core: Add a flag to control sequence numbering
At present we try to use the 'reg' property and device tree aliases to give
devices a sequence number. The 'reg' property is often actually a memory
address, so the sequence numbers thus-obtained are not useful. It would be
better if the devices were just sequentially numbered in that case. In fact
neither I2C nor SPI use this feature, so drop it.

Some devices need us to look up an alias to number them within the uclass.
Add a flag to control this, so it is not done unless it is needed.

Adjust the tests to test this new behaviour.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2015-01-29 17:09:55 -07:00
Masahiro Yamada
0bd4e39d2b fdt: remove fdtdec_get_alias_node() function
The fdt_path_offset() checks an alias too.

fdtdec_get_alias_node(blob, "foo") is equivalent to
fdt_path_offset(blob, "foo").

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-11-27 09:12:30 -07:00
Tom Rini
1739564e75 Merge git://git.denx.de/u-boot-dm
Conflicts:
	drivers/serial/serial-uclass.c

Signed-off-by: Tom Rini <trini@ti.com>
2014-11-24 12:01:48 -05:00
Simon Glass
236f2bd302 dm: Allow stdio registration to be dropped
Provide a CONFIG_DM_STDIO option to enable registering a serial device
with the stdio library. This is seldom useful in SPL, so disable it by
default when building for SPL.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
2014-11-21 08:13:14 +01:00
Simon Glass
ad1b81c880 dm: serial: Support changing the baud rate
Implement this feature in the uclass so that the baudrate can be changed
with 'setenv baudrate <rate>'.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-11-21 08:10:16 +01:00
Simon Glass
469a579df2 dm: serial: Move current serial port pointer to global_data
In general we can't store things in the data section until we have inited
SDRAM. Some platforms allow this (e.g. those with SPL) but some don't. Move
the pointer to global_data so that it will work on all platforms.

Without this fix the serial port will not work prior to relocation with
driver model on some platforms.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-11-21 07:24:11 +01:00
Masahiro Yamada
eea5a4cc1b dm: serial: consolidate common code more
Commit b8893327e9 (dm: serial: Put common code into separate functions)
consolidated getc() and putc().  This commit does more puts() and tsts().

Also rename locally used functions to _serial_*() for clarification
because we have similar functions names here are there in this file.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-10-23 21:43:09 -06:00
Masahiro Yamada
52a0a6f0dc dm: serial: remove unnecessary casting
The type (void *) can be directly passed to a function that
takes a specific pointer type.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-10-23 21:43:08 -06:00
Masahiro Yamada
bac644675a dm: serial: fix console putc
Commit b8893327e9 (dm: serial: Put common code into separate functions)
consolidated getc() correctly, but introduced another bug to putc();
serial_stub_putc() passes sdev->priv to serial_putc_dev(), but
serial_putc_dev() uses cur_dev instead of the given argument.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-10-23 21:43:08 -06:00
Simon Glass
91155c6560 dm: serial: Support CONFIG_CONS_INDEX if available
Try to use this option to select the correct uart for the console. This
mimics the behaviour of drivers/serial.c.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
2014-10-23 19:29:07 -06:00
Simon Glass
c487fd476c dm: serial: Reset the watchdog while waiting in getc()
We have moved the busy-wait loop out of drivers and into the uclass. This
means that we must reset the watchdog when busy-waiting.

Note: some drivers may still have a busy-wait even with driver model, as
a transition mechanism. Driver model will tolerate this, and is can be
cleaned up when all users of the driver use driver model. An example is
ns16550.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
2014-10-23 19:29:07 -06:00
Simon Glass
b8893327e9 dm: serial: Put common code into separate functions
Avoid duplicating the code which deals with getc() and putc(). It is fairly
simple, but may expand later.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-10-22 10:36:54 -06:00
Hans de Goede
4a74298c54 serial-uclass: Fix compilation error
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-10-10 12:37:59 -04:00
Hans de Goede
32d019265d stdio: Add force parameter to stdio_deregister
In some cases we really want to move forward with a deregister, add a force
parameter to allow this, and replace the dev with a nulldev in this case.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-10-06 14:50:43 +02:00
Simon Glass
59990bf0ea dm: serial: Don't require device tree to configure a console
Allow serial_find_console_or_panic() to work without a device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-09-23 12:44:30 -06:00
Simon Glass
57d92753d4 dm: Add a uclass for serial devices
Serial devices support simple byte input/output and a few operations to find
out whether data is available. Add a basic uclass for serial devices to be
used by drivers that are converted to driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-09-10 13:00:00 -06:00