Pasting longer lines into the U-Boot console prompt sometimes leads to
characters missing. One problem here is the small 16-byte FIFO of the
legacy NS16550 UART, e.g. on x86 platforms.

This patch now introduces a Kconfig option to enable RX interrupt
buffer support for NS16550 style UARTs. With this option enabled, I was
able paste really long lines into the U-Boot console, without any
characters missing.
Signed-off-by: NStefan Roese <sr@denx.de>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
[trini: Guard ns16550_serial_remove with
CONFIG_IS_ENABLED(SERIAL_PRESENT) to match struct assignment]
Signed-off-by: NTom Rini <trini@konsulko.com>

Add support for the debug UART to assist with early debugging.
Enable it for i.CoreM6 as an example.
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

At the same time, move to Kconfig
Signed-off-by: NChristophe Leroy <christophe.leroy@c-s.fr>

fix menutext for the options SPL_DM_SERIAL and TPL_DM_SERIAL.
Both have the same text as DM_SERIAL, which is
confusing.
Signed-off-by: NHeiko Schocher <hs@denx.de>
Reviewed-by: NStefan Roese <sr@denx.de>

Add debug UART functions to permit omap specific ns16550 to
provide an early debug UART. This is mostly in common with
DEBUG_UART_NS16550 except for Mode definition register which
is required for selecting UART mode(16x auto-baud or 13x mode).
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NTom Rini <trini@konsulko.com>

It is based on linux/drivers/tty/serial/bcm63xx_uart.c
Signed-off-by: NÁlvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

Only A23/A33 in SUN8I want a default value of CONS_INDEX of 5, for other
chips the default value is 1 like other Allwinner SoCs.

Fix this default value.

The original wrong value has lead to wrong console on H3 Orange Pi
boards.

Fixes: 7095f864 ("sunxi: Convert CONS_INDEX to Kconfig")
Signed-off-by: NIcenowy Zheng <icenowy@aosc.io>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

Convert the CONS_INDEX configuration to Kconfig.
Update sunxi's defconfigs to remove SYS_EXTRA_OPTIONS variable not
needed anymore.
Default value is 1 except for sun5i (equals 2) and sun8i (equals 5).
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
[Maxime: Added a depends on ARCH_SUNXI to avoid build breakages]
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

Add a specific serial driver for Intel MID platforms.

It has special fractional divider which can be programmed via UART_PS,
UART_MUL, and UART_DIV registers.

The UART clock is calculated as

	UART clock = XTAL * UART_MUL / UART_DIV

The baudrate is calculated as

	baud rate = UART clock / UART_PS / DLAB

Initialize fractional divider correctly for Intel Edison platform.

For backward compatibility we have to set initial DLAB value to 16
and speed to 115200 baud, where initial frequency is 29491200Hz, and
XTAL frequency is 38.4MHz.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NKever Yang <kever.yang@rock-chips.com>

Add separate enable/disable controls for driver-model serial. While this
is generally enabled in SPL it may not be in TPL, since serial output can
be obtained with the debug UART with minimal code size.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Move this in to Kconfig with a default of 115200.
Signed-off-by: NPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
[trini: Run moveconfig.py, reword commit slightly]
Signed-off-by: NTom Rini <trini@konsulko.com>

This patch adds support to ASC (asynchronous serial controller)
driver, which is basically a standard serial driver. This IP
is common across other STMicroelectronics SoCs
Signed-off-by: NPatrice Chotard <patrice.chotard@st.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

There is no CONFIG_OF_PLATDATA, only CONFIG_SPL_OF_PLATDATA, so rename
the two references to CONFIG_OF_PLATDATA to CONFIG_SPL_OF_PLATDATA.
Signed-off-by: NTom Rini <trini@konsulko.com>

Add CX9020 board based on mx53loco.
Add simplified imx53 base device tree from kernel v4.8-rc8, to reuse
serial_mxc with DTE and prepare for device tree migration of other
functions and imx53 devices.

The CX9020 differs from i.MX53 Quick Start Board by:
- use uart2 instead of uart1
- DVI-D connector instead of VGA
- no audio
- CCAT FPGA connected to emi
- enable rtc
Signed-off-by: NPatrick Bruenn <p.bruenn@beckhoff.com>

Migrate the PXA serial driver to be configured via Kconfig.
Signed-off-by: NMarcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: NMarek Vasut <marex@denx.de>

Add support to enable an early debug UART for debugging.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NAndreas Bießmann <andreas@biessmann.org>

Add ATMEL_USART option to support to enable the Atmel usart driver
from Kconfig.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: NAndreas Bießmann <andreas@biessmann.org>

Added kconfig for MXC_UART driver.

Cc: Simon Glass <sjg@chromium.org>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>

The Armada 3700's UART is a simple serial port. It has a 32 bytes
Tx FIFO and a 64 bytes Rx FIFO integrated. This patch adds support
for this UART including the DEBUG UART functions for very early
debug output.
Signed-off-by: NStefan Roese <sr@denx.de>
Cc: Nadav Haklai <nadavh@marvell.com>
Cc: Kostya Porotchkin <kostap@marvell.com>
Cc: Wilson Ding <dingwei@marvell.com>
Cc: Victor Gu <xigu@marvell.com>
Cc: Hua Jing <jinghua@marvell.com>
Cc: Terry Zhou <bjzhou@marvell.com>
Cc: Hanna Hawa <hannah@marvell.com>
Cc: Haim Boot <hayim@marvell.com>

This is very likely to be necessary for normal use cases.
Set its default to 'y' for shorter defconfig files.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

Add a driver that works with of-platdata. It sets up the platform data and
calls the standard ns16550 driver.
Signed-off-by: NSimon Glass <sjg@chromium.org>

This adds platform code for the Amlogic Meson GXBaby (S905) SoC and a
board definition for ODROID-C2. This initial submission only supports
UART and Ethernet (through the existing Designware driver). DTS files
are the ones submitted to Linux arm-soc for 4.7 [1].

[1] https://patchwork.ozlabs.org/patch/603583/Signed-off-by: NBeniamino Galvani <b.galvani@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

This patch add support for ar933x serial.
Signed-off-by: NWills Wang <wills.wang@live.com>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NDaniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

This driver works in "new" Data Mover UART mode, so
will be compatible with modern Qualcomm chips only.
Signed-off-by: NMateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Tested-by: NSimon Glass <sjg@chromium.org>

For ARM32 architecture, CONFIG_DEBUG_LL is available for early
low-level debugging (and actually UniPhier 32bit SoCs use it), but
ARM64 architecture does not support it.  Instead, CONFIG_DEBUG_UART
is available as an architecture-independent debug facility.

This commit supports it on all the UniPhier SoCs (including the new
ARMv8 SoCs), which is very useful for new SoC bringups.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

Enabling this driver requires some DT changes.
Adding DCC to root or main bus:
dcc: dcc {
	compatible = "arm,dcc";
	u-boot,dm-pre-reloc;
};

Extend alias list to link DCC:
	serial0 = &uart0;
	serial1 = &uart1;
	serial2 = &dcc;

Change stdout-path to point to dcc port.
	stdout-path = "serial2:115200n8";

Also add support for debug uart to help with early debug.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

This adds PIC32 UART controller support based on driver model.
Signed-off-by: NPaul Thacker <paul.thacker@microchip.com>
Signed-off-by: NPurna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: NDaniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

xilinx_uartlite has been ported to DM, this patch makes the
xilinx-ppc405-generic and the xilinx-ppc440-generic boards use the new
DM driver.
Signed-off-by: NRicardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: NStefan Roese <sr@denx.de>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NMichal Simek <michal.simek@xilinx.com>

- Move config option out of board file.
- Remove uartlite address from config file
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>

Add support for debug console.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>

LPUART is seen on Freescale VF610 and QorIQ Layerscape devices.
Create a Kconfig option and move it to defconfig for all boards
that have this serial driver.
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Acked-by: NStefan Agner <stefan.agner@toradex.com>
Acked-by: NSimon Glass <sjg@chromium.org>

This patch adds Kconfig entries to facilitate usage of pl01x as
a debug UART.
Signed-off-by: NSergey Temerkhanov <s.temerkhanov@gmail.com>
Signed-off-by: NRadha Mohan Chintakuntla <rchintakuntla@cavium.com>
Acked-by: NSimon Glass <sjg@chromium.org>

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: NSimon Glass <sjg@chromium.org>
Reviewed-by: NThomas Chou <thomas@wytron.com.tw>

Remove this c&p error from s5p driver.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

Move CONFIG_SYS_NS16550 to Kconfig, and run moveconfig.py.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>

Zap CONFIG_NS16550_SERIAL, as the unification of ns16550 drivers
is completed.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NSimon Glass <sjg@chromium.org>

Unify serial_rockchip, and use the generic binding.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
Tested-by: NAriel D'Alessandro <ariel@vanguardiasur.com.ar>
Acked-by: NSimon Glass <sjg@chromium.org>

Unify serial_ppc, and use the generic binding.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
[trini: Add TODO comment]
Signed-off-by: NTom Rini <trini@konsulko.com>

Unify serial_x86, and use the generic binding.
Signed-off-by: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NSimon 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: NThomas Chou <thomas@wytron.com.tw>
Reviewed-by: NTom Rini <trini@konsulko.com>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NHeiko Schocher <hs@denx.de>
Acked-by: NSimon Glass <sjg@chromium.org>