Add support for the Rockchip serial device using the ns16550 driver.
This uses driver model and device tree for both SPL and U-Boot proper.
Signed-off-by: Simon Glass <sjg@chromium.org>
SANDBOX_SERIAL depends on SANDBOX, and SANDBOX selects DM.
So, "SANDBOX_SERIAL depends on DM" is redundant.
Likewise, UNIPHIER_SERIAL depends on ARCH_UNIPHIER, and
ARCH_UNIPHIER selects DM_SERIAL.
So, "UNIPHIER_SERIAL depends on DM_SERIAL" is redundant.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
This is a convenient way for a driver to get the hardware address of a
device, when regmap or syscon are not being used. Change existing callers
to use it as an example to others.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Add SCIFA console interface for R-Car Gen2 SoCs.
SCIFA has different registers offsets and sizes then SCI. Hence it needs to
put it's macro definitions separately.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This driver is enabled only for UniPhier SoCs and ARCH_UNIPHIER now
selects OF_CONTROL and SPL_OF_CONTROL.
This driver no longer needs to support platform data configuration.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cleaning up order of include files by sorting them alphabetically
keeping in mind to leave common.h on top.
Signed-off-by: Marcel Ziswiler <marcel@ziswiler.com>
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>
- Import various DT files for DRA7 / DR72x / dra72-evm from Linux Kernel
v4.1
- Add config file for this board, enable DM and DM_GPIO
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The menuconfig for drivers are getting more and more cluttered
and unreadable because too many entries are displayed in a single
flat menu. Use hierarchic menu for each category.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: Update to apply again in a few places, drop USB hunk]
Signed-off-by: Tom Rini <trini@konsulko.com>
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>
As a debugging aid, allow UART3 to be used as a debug UART in SPL. This
is a precursor to proper UART support, which requires a substantial
refactor.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a debug UART implementation for this serial driver. It does not set up
pinmux automatically - this must be done before calling debug_uart_init().
Signed-off-by: Simon Glass <sjg@chromium.org>
The debug UART code needs to perform the same init as the normal UART
driver. In preparation for this, move the init code into two functions, one
for the basic init and one for setting the baud rate. This will make adding
debug UART support easier.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a serial driver which makes use of EFI's console in/out service.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested on Intel Crown Bay and QEMU
Tested-by: Bin Meng <bmeng.cn@gmail.com>
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>
Since Rockchip requires 32-bit serial access, add this to the driver.
Refactor a little to make this easier.
Signed-off-by: Simon Glass <sjg@chromium.org>
Added UART DCC support for armv8
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
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>
This option is used by some boards, so support it with driver model. This
is really ugly - we should rewrite this driver once all users are moved to
driver model.
Signed-off-by: Simon Glass <sjg@chromium.org>
The business for UniPhier Soc family has been transferred from
Panasonic Corporation to Socionext Inc.
Update the SoC select menu in Kconfig.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
In the Linux coding style, it is recommended to include <linux/io.h>
rather than <asm/io.h>. Follow this trend.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Due to a misunderstanding, in 698a12b we reverted changes that we in
fact wanted to keep. So lets fix that mistake and bring the code back
to how it should have been.
This reverts commit 698a12bef9.
Signed-off-by: Tom Rini <trini@konsulko.com>
As per the author, we don't need this patch really since the other patch
"stm32f4: fix serial output" superseded it.
This reverts commit 85e5f5b7a7.
Signed-off-by: Tom Rini <trini@konsulko.com>
This patch adds device tree support for arm pl010/pl011 driver.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Acked-by: Simon Glass <sjg@chromium.org>
Add the stm32F4 board's serial ports support.
User can use it easily.
The user only need to edit the number of the usart.
The patch also fix the serial print out.
Last, this version of patch fix the first patch checkpatch.pl error.
Thanks to Kamil Lulko.
Signed-off-by: kunhuahuang <huangkunhua@gmail.com>
This patch fix the serial output.
The source is from Kamil Lulko's "stm32f429-discovery board support"
Thanks, Varcain. I learned a lot.
Signed-off-by: kunhuahuang <huangkunhua@gmail.com>
On slow platforms not all baudrate setting is valid.
Check it directly in the driver and setup maximum possible
frequency.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This was accidentally added by commit dd0b0122ba
"serial: ns16550: Add an option to specify the debug UART register shift".
Remove it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Simon Glass <sjg@chromium.org>
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>
It is not necessary to write a zero baud rate to the device, and for some
chips this will cause problems. Drop this code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Allow this driver to support boards where the register shift is not 0.
This fixes some compiler warnings which appear in that case.
Signed-off-by: Simon Glass <sjg@chromium.org>
This UART permits different register spacing. To support the debug UART on
devices which have a spacing other than 1 byte, allow the shift value to
be specified.
Signed-off-by: Simon Glass <sjg@chromium.org>
commit aed2fbef5e
"dm: serial: Tidy up the pl01x driver"
caused a regression on (real hardware) PL010 by omitting
to update the line control register when switching baudrate.
Fix this by inlining the missing write to the baud control
register.
Also renaming the set_line_control() function to
pl011_set_line_control() since this function is clearly
PL011-specific, and it won't suffice to call that to
set up line control.
Tested on the Integrator/AP hardware.
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the case where the arch defines a custom map_sysmem(), make sure that
including just mapmem.h is sufficient to have these functions as they
are when the arch does not override it.
Also split the non-arch specific functions out of common.h
Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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>
Now when all infrastructure in ARC is ready for it let's switch ARC UART
to driver model.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Simon Glass <sjg@chromium.org>
Being global variable with 0 value it falls into .bss area which we may
only use after relocation to RAM. And right afetr relocation we zero
.bss - effectively cleaing register address set for early console.
Now with pre-set value "regs" variable is no longer in .bss and this way
safely survives relocation.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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>
Panasonic's System LSI products, UniPhier SoC family, have been
transferred to Socionext Inc.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
We do not have to set the LCR register every time we change the
baud-rate. We just need to set it up once in the probe function.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
For PH1-Pro4, the 8 bit write access to LCR register (offset = 0x11)
is not working correctly. As a side effect, it also modifies MCR
register (offset = 0x10) and results in unexpected behavior.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
The formula to calculate SCIF BRR for R-Car H2/M2/E2 SoCs is as follows:
BRR = pclk / (64 * 2^(2n-1) * baudrate) - 1,
the prescaler is 0 due to SCSMR settings, hence n=0
Also SCSCR must be set to use internal or external clock source.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
These are still non-generic boards.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Greg Ungerer <greg.ungerer@opengear.com>
Acked-by: Marek Vasut <marex@denx.de>
Add debug UART functions to permit ns16550 to provide an early debug UART.
Try to avoid using the stack so that this can be called from assembler before
a stack is set up (at least on ARM and PowerPC).
Signed-off-by: Simon Glass <sjg@chromium.org>
For the debug UART we need to be able to provide any parameters before
driver model is set up. Add parameters to the low-level access functions
to make this possible.
Signed-off-by: Simon Glass <sjg@chromium.org>
This came up in a discussion on the mailing list here:
https://patchwork.ozlabs.org/patch/384613/
My concerns at the time were:
- it doesn't need to be written in assembler
- it doesn't need to be ARM-specific
This patch provides a possible alternative. It works by allowing any serial
driver to export one init function and provide a putc() function. These
can be used to output debug data before the real serial driver is available.
This implementation does not depend on driver model, and it is possible for
it to operate without a stack on some architectures (e.g. PowerPC, ARM). It
provides the same features as the ARM-specific debug.S but with more UART
and architecture support.
Signed-off-by: Simon Glass <sjg@chromium.org>
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>
This adds driver model support with this driver. This was tested by Koelsch
board and Gose board.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Simon Glass <sjg@chromium.org>
Expand the help messages for each driver. Add missing Kconfig for I2C,
SPI flash and thermal.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
This uses the ns16550 driver but sets up the clock at run-time. It does
not seem to be available in the device tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
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>
Use ePAPR defined properties for x86-uart: clock-frequency and
current-speed. Assign the value of clock-frequency in device tree
to plat->clock of x86-uart instead of using hardcoded number.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
There are many pci uart devices which are ns16550 compatible. We can
describe them in the board dts file and use it as the U-Boot serial
console as specified in the chosen node 'stdout-path' property.
Those pci uart devices can have their register be memory-mapped, or
i/o-mapped. The driver will try to use the memory-mapped register if
the reg property in the node has an entry to describe the memory-mapped
register, otherwise i/o-mapped register will be used.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
The private data size is missing from the driver, so we store it at 0,
which causes problems when something overwrites memory at 0.
Fix this.
Change-Id: I6f551ee905b0064ae8343e41e46450c37c8c8c1a
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
pl010 & pl011 have different control register offsets, setting it as per
the pl01x type.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Acked-by: Simon Glass <sjg@chromium.org>
Receive line control uses same setting as transmit line control, also one lcrh
write is effective for both baud rate & receive line control internal update.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Acked-by: Simon Glass <sjg@chromium.org>
UART_IBRD, UART_FBRD, and UART_LCR_H form a single 30-bit wide register which
is updated on a single write strobe generated by a UART_LCR_H write. So, to
internally update the content of UART_IBRD or UART_FBRD, a write to UART_LCR_H
must always be performed at the end.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Acked-by: Simon Glass <sjg@chromium.org>
Although we were checking the pl01x type, seems like PL010 type was being
passed by mistake.
Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Acked-by: Simon Glass <sjg@chromium.org>
The same problem that is seen on some OMAP3 is also seen on some OMAP4
so include them in the test in order to prevent some hangs during SPL.
[trini: Re-word commit message, make apply cleanly]
Signed-off-by: Tom Rini <trini@ti.com>
This commit implements the ofdata_to_platdata handler for the UniPhier
serial driver and adds serial device nodes to the device tree sources.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
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>
U-Boot has never cared about the type when we get max/min of two
values, but Linux Kernel does. This commit gets min, max, min3, max3
macros synced with the kernel introducing type checks.
Many of references of those macros must be fixed to suppress warnings.
We have two options:
- Use min, max, min3, max3 only when the arguments have the same type
(or add casts to the arguments)
- Use min_t/max_t instead with the appropriate type for the first
argument
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Pavel Machek <pavel@denx.de>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
[trini: Fixup arch/blackfin/lib/string.c]
Signed-off-by: Tom Rini <trini@ti.com>
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>
Add driver model support while retaining the existing legacy code. This
allows the driver to support boards that have converted to driver model
as well as those that have not.
Signed-off-by: Simon Glass <sjg@chromium.org>
Before adding driver model support, split out a few of the functions so
that they can be used by the driver model code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Andreas Bießmann <andreas.devel@googlemail.com>
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>
The same bit-field macros are defined in include/linux/serial_reg.h
so let's include it and delete duplicated defines.
Also, remove unnecessary inclusion of <common.h>.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Add a driver for the designware serial UART used on sunxi. This just
redirects to the normal ns16550 driver.
Add a stdout-path to the device tree so that the correct UART is chosen.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This adds the preset value to register for R8A7793.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
The UniPhier serial driver has been converted to driver model.
Let's remove uniphier_serial_initialize() call from the old
serial driver framework.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit converts UniPhier on-chip serial driver to driver model.
Since UniPhier SoCs do not have Device Tree support, some board files
should be added under arch/arm/cpu/armv7/uniphier/ph1-*/ directories.
(Device Tree support for UniPhier platform is still under way.)
Now the base address and master clock frequency are passed from
platform data, so CONFIG_SYS_UNIPHIER_SERIAL_BASE* and
CONFIG_SYS_UNIPHIER_UART_CLK should be removed.
Tested on UniPhier PH1-LD4 ref board.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
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>
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>
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>
The functions _serial_putc, _serial_putc_raw, _serial_puts,
_serial_getc, _serial_tstc, _serial_setbrg are defined and used
locally in each of serial_ns16550.c and serial_s3c24x0.c.
Add static directive to them and remove declarations from
include/common.h.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
The platform_data definitions are generally referenced from both
drivers and board files. That is why header files defining
platform_data sturectures are placed in "include" directory,
but our top level "include" directory is already too cluttered.
Let's collect platform_data definitions under the directory
"include/dm/platform_data" like Linux gathers ones around under
"include/linux/platform_data".
This commit moves two header files:
include/serial_mxc.h -> include/dm/platform_data/serial_mxc.h
include/serial_pl01x.h -> include/dm/platform_data/serial_pl01x.h
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Add driver model support to this driver, while retaining support for the
legacy system. Driver model serial support is enabled with CONFIG_DM_SERIAL
as usual.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
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>
The probe logic sets up the pointer to the platform data in the device
tree decode method. It should be done in the probe() method, and anyway
the device tree decode method can't be used when CONFIG_OF_CONTROL is
not enabled.
Fix these two problems.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
It is inconvenient to have to use casts when specifying platform data. Also
it is not strictly correct, since we should use map_sysmem() to convert an
address to a pointer.
Adjust the platform data to use an address.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
There is a bug in the logic which checks for an available character. This
can cause invalid characters to be received - this was noticed on
beaglebone. Fix it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
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>
Add driver model support in this driver, using platform data provided by
the board.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Adjust the driver so that leaf functions take a pointer to the serial port
register base. Put all the global configuration in the init function, and
use the same settings from then on.
This makes it much easier to move to driver model without duplicating the
code, since with driver model we use platform data rather than global
settings.
The driver is compiled with either the CONFIG_PL010_SERIAL or
CONFIG_PL011_SERIAL option and this determines the uart type. With driver
model this needs to come in from platform data, so create a new
CONFIG_PL01X_SERIAL config which brings in the driver, and adjust the
driver to support both peripheral variants.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Add driver model support with this driver. Boards which use this driver
should define platform data in their board files.
Signed-off-by: Simon Glass <sjg@chromium.org>
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>
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>
This would be useful to start moving various config options.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Use driver model for serial ports.
Since Tegra now uses driver model for serial, adjust the definition of
V_NS16550_CLK so that it is clear that this is only used for SPL.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add driver model support so that ns16550 can support operation both with
and without driver model.
The driver needs a clock frequency so cannot stand alone unfortunately. The
clock frequency must be provided by a separate driver.
Signed-off-by: Simon Glass <sjg@chromium.org>
The same sequence is used in several places, so move it into a function.
Note that UART_LCR_BKSE is an alias for UART_LCR_DLAB.
Signed-off-by: Simon Glass <sjg@chromium.org>
The current sandbox serial driver is a pretty trivial example and does not
have the featues that might be needed for other board serial drivers. To
help provide a better example, add a text colour property to the device
tree for sandbox. This uses platform data, a device tree node, driver
private data and a remove() method.
Signed-off-by: Simon Glass <sjg@chromium.org>
Adjust the sandbox serial driver to use the new driver model uclass. The
driver works much as before, but within the new framework.
Signed-off-by: Simon Glass <sjg@chromium.org>
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>
The stdio_dev structure has a private pointer for its creator, but it is
not set up by the serial system. Set it to point to the serial device so
that it can be found by code called by stdio.
Signed-off-by: Simon Glass <sjg@chromium.org>
UART does not use the UART FIFO, but we should also not rely that
the UART FIFO is diabled by default. For instance, when loading
U-Boot using the boot ROMs serial downloader protocol over UART,
FIFO is enabled at U-Boot start time.
This patch disables the RX and TX FIFO, sets back their thresholds
and flushes them.
Signed-off-by: Stefan Agner <stefan@agner.ch>
The status register 1 (S1) is not writeable, hence we should not
write it. In order to clear the RDRF flag we only need to read
the data register.
Also, when stressing U-Boot a lot with serial input, an overflow can
occur which asserts the S1_OR flag (while not asserting the S1_RDRF
flag). To clear this flag we again just need to read the data
register, hence add this flag to the abort conditions for the while
loop.
Insert a compiler barrier to make sure reading the data register
gets executed after reading the status register.
Signed-off-by: Stefan Agner <stefan@agner.ch>
On vybrid, lpuart's registers are 8-bit. On LS102xA, lpuart's registers
are 32-bit. This patch adds the support for 32-bit registers on
LS102xA.
Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Yuan Yao <yao.yuan@freescale.com>
The nios2-yanu.h contains hardware registers and bits of
opencores yanu. As there is no other user of this header
, it should be moved into the driver.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
CC: Renato Andreola <renato.andreola@imagos.it>
The nios2-io.h defines hardware registers and bits of several FPGA
IP cores. It could be divided in to the specific drivers, including
altera timer, altera sysid, altera uart and altera jtag uart. The
altera pio and altera spi drivers use their own hardware definitions.
The removal of nios2-io.h will help modularity and maintenance.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
The following configs are not defined at all.
- CONFIG_OMAP1510
- CONFIG_OMAP_1510P1
- CONFIG_OMAP_SX1
- CONFIG_OMAP3_DMA
- CONFIG_OMAP3_ZOOM2
- CONFIG_OMAP_INNOVATOR
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>
R8A7780 and R7A7791 of rmobile supports External Clock mode, and these uses
different from Internal Clock mode registers and calculations to the baud rate
setting. This adds function for External Clock mode.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
R8A7794 has DL and CKS register, and these registers are used in external clock
mode. This adds support these for R8A7794.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
