u-boot/drivers/serial/Kconfig
Algapally Santosh Sagar bd9ff681bd serial: zynqmp: Fetch baudrate from dtb and update
The baudrate configured in .config is taken by default by serial. If
change of baudrate is required then the .config needs to changed and
u-boot recompilation is required or the u-boot environment needs to be
updated.

To avoid this, support is added to fetch the baudrate directly from the
device tree file and update.
The serial, prints the log with the configured baudrate in the dtb.
The commit c4df0f6f31 ("arm: mvebu: Espressobin: Set default value for
$fdtfile env variable") is taken as reference for changing the default
environment variable.

The default environment stores the default baudrate value, When default
baudrate and dtb baudrate are not same glitches are seen on the serial.
So, the environment also needs to be updated with the dtb baudrate to
avoid the glitches on the serial.

Also add test to cover this new function.

Signed-off-by: Algapally Santosh Sagar <santoshsagar.algapally@amd.com>
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20230921112043.3144726-3-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
2023-11-07 13:47:08 +01:00

1160 lines
37 KiB
Text

#
# Serial device configuration
#
menuconfig SERIAL
bool "Serial"
default y
help
Enable support for serial drivers. This allows use of a serial UART
for displaying messages while U-Boot is running. It also brings in
printf() and panic() functions. This should normally be enabled
unless there are space reasons not to. If you just need to disable
the console you can adjust the stdout environment variable or use
SILENT_CONSOLE.
if SERIAL
config BAUDRATE
int "Default baudrate"
default 115200
help
Select a default baudrate, where "default" has a driver-specific
meaning of either setting the baudrate for the early debug UART
in the SPL stage (most drivers) or for choosing a default baudrate
in the absence of an environment setting (serial_mxc.c).
config OF_SERIAL_BAUD
bool "Fetch serial baudrate from device tree"
depends on DM_SERIAL && SPL_ENV_SUPPORT
select DEFAULT_ENV_IS_RW
help
Select this to enable fetching and setting of the baudrate
configured in the DT. Replace the default baudrate with the DT
baudrate and also set it to the environment.
config DEFAULT_ENV_IS_RW
bool "Make default environment as writable"
help
Select this to enable to make default environment writable. This
allows modifying the default environment.
config REQUIRE_SERIAL_CONSOLE
bool "Require a serial port for console"
# Running without a serial console is not supported by the
# non-dm serial code
depends on DM_SERIAL
default y
help
Require a serial port for the console, and panic if none is found
during serial port initialization (default y). Set this to n on
boards which have no debug serial port whatsoever.
config SPECIFY_CONSOLE_INDEX
bool "Specify the port number used for console"
default y if !DM_SERIAL || (SPL && !SPL_DM_SERIAL) || \
(TPL && !TPL_DM_SERIAL)
help
In various cases, we need to specify which of the UART devices that
a board or SoC has available are to be used for the console device
in U-Boot.
config SERIAL_PRESENT
bool "Provide a serial driver"
depends on DM_SERIAL
default y
help
In 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.
This option enables the full UART in U-Boot, so if is it disabled,
the full UART driver will be omitted, thus saving space.
config SPL_SERIAL_PRESENT
bool "Provide a serial driver in SPL"
depends on DM_SERIAL && SPL
default y
help
In 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.
This option enables the full UART in SPL, so if is it disabled,
the full UART driver will be omitted, thus saving space.
config TPL_SERIAL_PRESENT
bool "Provide a serial driver in TPL"
depends on DM_SERIAL && TPL
default y
help
In 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.
This option enables the full UART in TPL, so if is it disabled,
the full UART driver will be omitted, thus saving space.
config VPL_SERIAL_PRESENT
bool "Provide a serial driver in VPL"
depends on DM_SERIAL && VPL
default y
help
In 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.
This option enables the full UART in TPL, so if is it disabled,
the full UART driver will be omitted, thus saving space.
config CONS_INDEX
int "UART used for console"
depends on SPECIFY_CONSOLE_INDEX
range 0 6
default 1
help
Set this to match the UART number of the serial console.
config DM_SERIAL
bool "Enable Driver Model for serial drivers"
depends on DM
select SYS_MALLOC_F
help
Enable driver model for serial. This replaces
drivers/serial/serial.c with the serial uclass, which
implements serial_putc() etc. The uclass interface is
defined in include/serial.h.
config SERIAL_RX_BUFFER
bool "Enable RX buffer for serial input"
depends on DM_SERIAL
help
Enable RX buffer support for the serial driver. This enables
pasting longer strings, even when the RX FIFO of the UART is
not big enough (e.g. 16 bytes on the normal NS16550).
config SERIAL_RX_BUFFER_SIZE
int "RX buffer size"
depends on SERIAL_RX_BUFFER
default 256
help
The size of the RX buffer (needs to be power of 2)
config SERIAL_PUTS
bool "Enable printing strings all at once"
depends on DM_SERIAL
help
Some serial drivers are much more efficient when printing multiple
characters at once rather than printing characters individually. This
can be because they can load a fifo, or because individual print
calls have a constant overhead. With this option set, the serial
subsystem will try to provide serial drivers with as many characters
at once as possible, instead of printing characters one by one. Most
serial drivers do not need this config to print efficiently. If
unsure, say N.
config SERIAL_SEARCH_ALL
bool "Search for serial devices after default one failed"
depends on DM_SERIAL
help
The serial subsystem only searches for a single serial device
that was instantiated, but does not check whether it was probed
correctly. With this option set, we make successful probing
mandatory and search for fallback serial devices if the default
device does not work.
If unsure, say N.
config SERIAL_PROBE_ALL
bool "Probe all available serial devices"
depends on DM_SERIAL
help
The serial subsystem only probes for a single serial device,
but does not probe for other remaining serial devices.
With this option set, we make probing and searching for
all available devices optional.
Normally, U-Boot talks to one serial port at a time, but SBSA
compliant UART devices like PL011 require initialization
by firmware and to let the kernel use serial port for sending
and receiving the characters.
If unsure, say N.
config SPL_DM_SERIAL
bool "Enable Driver Model for serial drivers in SPL"
depends on DM_SERIAL && SPL_DM
default y
help
Enable driver model for serial in SPL. This replaces
drivers/serial/serial.c with the serial uclass, which
implements serial_putc() etc. The uclass interface is
defined in include/serial.h.
config TPL_DM_SERIAL
bool "Enable Driver Model for serial drivers in TPL"
depends on DM_SERIAL && TPL_DM
default y if TPL && DM_SERIAL
help
Enable driver model for serial in TPL. This replaces
drivers/serial/serial.c with the serial uclass, which
implements serial_putc() etc. The uclass interface is
defined in include/serial.h.
config VPL_DM_SERIAL
bool "Enable Driver Model for serial drivers in VPL"
depends on DM_SERIAL
default y if VPL && DM_SERIAL
help
Enable driver model for serial in VPL. This replaces
drivers/serial/serial.c with the serial uclass, which
implements serial_putc() etc. The uclass interface is
defined in include/serial.h.
config DEBUG_UART
bool "Enable an early debug UART for debugging"
help
The debug UART is intended for use very early in U-Boot to debug
problems when an ICE or other debug mechanism is not available.
To use it you should:
- Make sure your UART supports this interface
- Enable CONFIG_DEBUG_UART
- Enable the CONFIG for your UART to tell it to provide this interface
(e.g. CONFIG_DEBUG_UART_NS16550)
- Define the required settings as needed (see below)
- Call debug_uart_init() before use
- Call debug_uart_putc() to output a character
Depending on your platform it may be possible to use this UART before
a stack is available.
If your UART does not support this interface you can probably add
support quite easily. Remember that you cannot use driver model and
it is preferred to use no stack.
You must not use this UART once driver model is working and the
serial drivers are up and running (done in serial_init()). Otherwise
the drivers may conflict and you will get strange output.
choice
prompt "Select which UART will provide the debug UART"
depends on DEBUG_UART
default DEBUG_SBI_CONSOLE if RISCV_SMODE
default DEBUG_UART_NS16550
config DEBUG_UART_ALTERA_JTAGUART
bool "Altera JTAG UART"
depends on ALTERA_JTAG_UART
help
Select this to enable a debug UART using the altera_jtag_uart driver.
You will need to provide parameters to make this work. The driver will
be available until the real driver model serial is running.
config DEBUG_UART_ALTERA_UART
bool "Altera UART"
depends on ALTERA_UART
help
Select this to enable a debug UART using the altera_uart driver.
You will need to provide parameters to make this work. The driver will
be available until the real driver model serial is running.
config DEBUG_UART_AR933X
bool "QCA/Atheros ar933x"
depends on AR933X_UART
help
Select this to enable a debug UART using the ar933x uart driver.
You will need to provide parameters to make this work. The
driver will be available until the real driver model serial is
running.
config DEBUG_ARC_SERIAL
bool "ARC UART"
depends on ARC_SERIAL
help
Select this to enable a debug UART using the ARC UART driver.
You will need to provide parameters to make this work. The
driver will be available until the real driver model serial is
running.
config DEBUG_UART_ATMEL
bool "Atmel USART"
depends on ATMEL_USART
help
Select this to enable a debug UART using the atmel usart driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_BCM6345
bool "BCM6345 UART"
depends on BCM6345_SERIAL
help
Select this to enable a debug UART on BCM6345 SoCs. You
will need to provide parameters to make this work. The driver will
be available until the real driver model serial is running.
config DEBUG_UART_NS16550
bool "ns16550"
depends on SYS_NS16550
help
Select this to enable a debug UART using the ns16550 driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver model serial is running.
config DEBUG_EFI_CONSOLE
bool "EFI"
depends on EFI_APP
help
Select this to enable a debug console which calls back to EFI to
output to the console. This can be useful for early debugging of
U-Boot when running on top of EFI (Extensive Firmware Interface).
This is a type of BIOS used by PCs.
config DEBUG_SBI_CONSOLE
bool "SBI"
depends on RISCV_SMODE
help
Select this to enable a debug console which calls back to SBI to
output to the console. This can be useful for early debugging of
U-Boot when running on top of SBI (Supervisor Binary Interface).
This implementation of the debug UART is not available while in
M-mode (e.g. during SPL).
config DEBUG_UART_S5P
bool "Samsung S5P"
depends on ARCH_APPLE || ARCH_EXYNOS || ARCH_S5PC1XX
help
Select this to enable a debug UART using the serial_s5p driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_MSM_GENI
bool "Qualcomm snapdragon"
depends on ARCH_SNAPDRAGON
help
Select this to enable a debug UART using the serial_msm driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_MESON
bool "Amlogic Meson"
depends on MESON_SERIAL
help
Select this to enable a debug UART using the serial_meson driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_UARTLITE
bool "Xilinx Uartlite"
depends on XILINX_UARTLITE
help
Select this to enable a debug UART using the serial_uartlite driver.
You will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_ARM_DCC
bool "ARM DCC"
depends on ARM_DCC
help
Select this to enable a debug UART using the ARM JTAG DCC port.
The DCC port can be used for very early debugging and doesn't require
any additional setting like address/baudrate/clock. On systems without
any serial interface this is the easiest way how to get console.
Every ARM core has own DCC port which is the part of debug interface.
This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
architectures.
config DEBUG_MVEBU_A3700_UART
bool "Marvell Armada 3700"
depends on MVEBU_A3700_UART
help
Select this to enable a debug UART using the serial_mvebu driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_ZYNQ
bool "Xilinx Zynq"
depends on ZYNQ_SERIAL
help
Select this to enable a debug UART using the serial_zynq driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_APBUART
depends on LEON3
bool "Gaisler APBUART"
help
Select this to enable a debug UART using the serial_leon3 driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver model serial is running.
config DEBUG_UART_PL010
bool "pl010"
depends on PL01X_SERIAL
help
Select this to enable a debug UART using the pl01x driver with the
PL010 UART type. You will need to provide parameters to make this
work. The driver will be available until the real driver model
serial is running.
config DEBUG_UART_PL011
bool "pl011"
depends on PL01X_SERIAL || PL011_SERIAL
help
Select this to enable a debug UART using the pl01x driver with the
PL011 UART type. You will need to provide parameters to make this
work. The driver will be available until the real driver model
serial is running.
config DEBUG_UART_PIC32
bool "Microchip PIC32"
depends on PIC32_SERIAL
help
Select this to enable a debug UART using the serial_pic32 driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver model serial is running.
config DEBUG_UART_MXC
bool "IMX Serial port"
depends on MXC_UART
help
Select this to enable a debug UART using the serial_mxc driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver model serial is running.
config DEBUG_UART_SANDBOX
bool "sandbox"
depends on SANDBOX_SERIAL
help
Select this to enable the debug UART using the sandbox driver. This
provides basic serial output from the console without needing to
start up driver model. The driver will be available until the real
driver model serial is running.
config DEBUG_UART_SEMIHOSTING
bool "semihosting"
depends on SEMIHOSTING_SERIAL
help
Select this to enable the debug UART using the semihosting driver.
This provides basic serial output from the console without needing to
start up driver model. The driver will be available until the real
driver model serial is running.
config DEBUG_UART_SCIF
bool "Renesas SCIF UART"
depends on SH || ARCH_RMOBILE
help
Select this to enable a debug UART using the serial_sh driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_SIFIVE
bool "SiFive UART"
depends on SIFIVE_SERIAL
help
Select this to enable a debug UART using the serial_sifive driver. You
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_STM32
bool "STMicroelectronics STM32"
depends on STM32_SERIAL
help
Select this to enable a debug UART using the serial_stm32 driver
You will need to provide parameters to make this work.
The driver will be available until the real driver model
serial is running.
config DEBUG_UART_UNIPHIER
bool "UniPhier on-chip UART"
depends on ARCH_UNIPHIER
help
Select this to enable a debug UART using the UniPhier on-chip UART.
You will need to provide DEBUG_UART_BASE to make this work. The
driver will be available until the real driver-model serial is
running.
config DEBUG_UART_OMAP
bool "OMAP uart"
depends on OMAP_SERIAL
help
Select this to enable a debug UART using the omap ns16550 driver.
You will need to provide parameters to make this work. The driver
will be available until the real driver model serial is running.
config DEBUG_UART_MTK
bool "MediaTek High-speed UART"
depends on MTK_SERIAL
help
Select this to enable a debug UART using the MediaTek High-speed
UART driver.
You will need to provide parameters to make this work. The
driver will be available until the real driver model serial is
running.
config DEBUG_UART_MT7620
bool "UART driver for MediaTek MT7620 and earlier SoCs"
depends on MT7620_SERIAL
help
Select this to enable a debug UART using the UART driver for
MediaTek MT7620 and earlier SoCs.
You will need to provide parameters to make this work. The
driver will be available until the real driver model serial is
running.
endchoice
config DEBUG_UART_BASE
hex "Base address of UART"
depends on DEBUG_UART
default 0x0 if DEBUG_SBI_CONSOLE
default 0x0 if DEBUG_UART_SANDBOX
default 0xff000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQMP
default 0xe0000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQ
help
This is the base address of your UART for memory-mapped UARTs.
A default should be provided by your board, but if not you will need
to use the correct value here.
config SPL_DEBUG_UART_BASE
hex "Base address of UART for SPL"
depends on SPL && DEBUG_UART
default DEBUG_UART_BASE
help
This is the base address of your UART for memory-mapped UARTs for SPL.
config TPL_DEBUG_UART_BASE
hex "Base address of UART for TPL"
depends on TPL && DEBUG_UART
default DEBUG_UART_BASE
help
This is the base address of your UART for memory-mapped UARTs for TPL.
config DEBUG_UART_CLOCK
int "UART input clock"
depends on DEBUG_UART
default 0 if DEBUG_SBI_CONSOLE
default 0 if DEBUG_UART_SANDBOX
default 0 if DEBUG_MVEBU_A3700_UART
default 100000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQMP
default 50000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQ
help
The UART input clock determines the speed of the internal UART
circuitry. The baud rate is derived from this by dividing the input
clock down.
A default should be provided by your board, but if not you will need
to use the correct value here.
config DEBUG_UART_SHIFT
int "UART register shift"
depends on DEBUG_UART
default 0 if DEBUG_UART
help
Some UARTs (notably ns16550) support different register layouts
where the registers are spaced either as bytes, words or some other
value. Use this value to specify the shift to use, where 0=byte
registers, 2=32-bit word registers, etc.
config DEBUG_UART_BOARD_INIT
bool "Enable board-specific debug UART init"
depends on DEBUG_UART
help
Some boards need to set things up before the debug UART can be used.
On these boards a call to debug_uart_init() is insufficient. When
this option is enabled, the function board_debug_uart_init() will
be called when debug_uart_init() is called. You can put any code
here that is needed to set up the UART ready for use, such as set
pin multiplexing or enable clocks.
config DEBUG_UART_ANNOUNCE
bool "Show a message when the debug UART starts up"
depends on DEBUG_UART
help
Enable this option to show a message when the debug UART is ready
for use. You will see a message like "<debug_uart> " as soon as
U-Boot has the UART ready for use (i.e. your code calls
debug_uart_init()). This can be useful just as a check that
everything is working.
config DEBUG_UART_SKIP_INIT
bool "Skip UART initialization"
depends on DEBUG_UART
help
Select this if the UART you want to use for debug output is already
initialized by the time U-Boot starts its execution.
config DEBUG_UART_NS16550_CHECK_ENABLED
bool "Check if UART is enabled on output"
depends on DEBUG_UART
depends on DEBUG_UART_NS16550
help
Select this if puts()/putc() might be called before the debug UART
has been initialized. If this is disabled, putc() might sit in a
tight loop if it is called before debug_uart_init() has been called.
Note that this does not work for every ns16550-compatible UART and
so has to be enabled carefully or you might notice lost characters.
config ALTERA_JTAG_UART
bool "Altera JTAG UART support"
depends on DM_SERIAL
help
Select this to enable an JTAG UART for Altera devices.The JTAG UART
core implements a method to communicate serial character streams
between a host PC and a Qsys system on an Altera FPGA. Please find
details on the "Embedded Peripherals IP User Guide" of Altera.
config ALTERA_JTAG_UART_BYPASS
bool "Bypass output when no connection"
depends on ALTERA_JTAG_UART
help
Bypass console output and keep going even if there is no JTAG
terminal connection with the host. The console output will resume
once the JTAG terminal is connected. Without the bypass, the console
output will wait forever until a JTAG terminal is connected. If you
not are sure, say Y.
config ALTERA_UART
bool "Altera UART support"
depends on DM_SERIAL
help
Select this to enable an UART for Altera devices. Please find
details on the "Embedded Peripherals IP User Guide" of Altera.
config AR933X_UART
bool "QCA/Atheros ar933x UART support"
depends on DM_SERIAL && SOC_AR933X
help
Select this to enable UART support for QCA/Atheros ar933x
devices. This driver uses driver model and requires a device
tree binding to operate, please refer to the document at
doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
config ARC_SERIAL
bool "ARC UART support"
depends on DM_SERIAL
help
Select this to enable support for ARC UART now typically
only used in Synopsys DesignWare ARC simulators like nSIM.
config ARM_DCC
bool "ARM Debug Communication Channel (DCC) as UART support"
depends on ARM
help
Select this to enable using the ARM DCC as a form of UART.
config ATMEL_USART
bool "Atmel USART support"
help
Select this to enable USART support for Atmel SoCs. It can be
configured in the device tree, and input clock frequency can
be got from the clk node.
config SPL_UART_CLOCK
int "SPL fixed UART input clock"
depends on ATMEL_USART && SPL && !SPL_CLK
default 132096000 if ARCH_AT91
help
Provide a fixed clock value as input to the UART controller. This
might be needed on platforms which can't enable CONFIG_SPL_CLK
because of SPL image size restrictions.
config BCM283X_MU_SERIAL
bool "Support for BCM283x Mini-UART"
depends on DM_SERIAL && ARCH_BCM283X
default y
help
Select this to enable Mini-UART support on BCM283X family of SoCs.
config BCM283X_PL011_SERIAL
bool "Support for BCM283x PL011 UART"
depends on PL01X_SERIAL && ARCH_BCM283X
default y
help
Select this to enable an overriding PL011 driver for BCM283X SoCs
that supports automatic disable, so that it only gets used when
the UART is actually muxed.
config BCM6345_SERIAL
bool "Support for BCM6345 UART"
depends on DM_SERIAL
help
Select this to enable UART on BCM6345 SoCs.
config COREBOOT_SERIAL
bool "Coreboot UART support"
depends on DM_SERIAL
default y if SYS_COREBOOT
select SYS_NS16550
help
Select this to enable a ns16550-style UART where the platform data
comes from the coreboot 'sysinfo' tables. This allows U-Boot to have
a serial console on any platform without needing to change the
device tree, etc.
config COREBOOT_SERIAL_FROM_DBG2
bool "Obtain UART from ACPI tables"
depends on COREBOOT_SERIAL
default y
help
Select this to try to find a DBG2 record in the ACPI tables, in the
event that coreboot does not provide information about the UART in the
normal sysinfo tables. This provides a useful fallback when serial
is not enabled in coreboot.
config CORTINA_UART
bool "Cortina UART support"
depends on DM_SERIAL
help
Select this to enable UART support for Cortina-Access UART devices
found on CAxxxx SoCs.
config FSL_LINFLEXUART
bool "Freescale Linflex UART support"
depends on DM_SERIAL
help
Select this to enable the Linflex serial module found on some
NXP SoCs like S32V234.
config FSL_LPUART
bool "Freescale LPUART support"
help
Select this to enable a Low Power UART for Freescale VF610 and
QorIQ Layerscape devices.
config LPUART
bool "Use the LPUART as console"
depends on FSL_LPUART
config MVEBU_A3700_UART
bool "UART support for Armada 3700"
help
Choose this option to add support for UART driver on the Marvell
Armada 3700 SoC. The base address is configured via DT.
config MCFUART
bool "Freescale ColdFire UART support"
help
Choose this option to add support for UART driver on the ColdFire
SoC's family. The serial communication channel provides a full-duplex
asynchronous/synchronous receiver and transmitter deriving an
operating frequency from the internal bus clock or an external clock.
config MXC_UART
bool "IMX serial port support"
depends on ARCH_MX31 || MX5 || MX6 || MX7 || IMX8M
help
If you have a machine based on a Motorola IMX CPU you
can enable its onboard serial port by enabling this option.
config NULLDEV_SERIAL
bool "Null serial device"
help
Select this to enable null serial device support. A null serial
device merely acts as a placeholder for a serial device and does
nothing for all it's operation.
config PIC32_SERIAL
bool "Support for Microchip PIC32 on-chip UART"
depends on DM_SERIAL && MACH_PIC32
default y
help
Support for the UART found on Microchip PIC32 SoC's.
config SYS_NS16550_SERIAL
bool "NS16550 UART or compatible legacy driver"
depends on !DM_SERIAL
select SYS_NS16550
config SPL_SYS_NS16550_SERIAL
bool "NS16550 UART or compatible legacy driver in SPL"
depends on SPL && !SPL_DM_SERIAL
default y if SYS_NS16550_SERIAL || ARCH_SUNXI || ARCH_OMAP2PLUS
select SYS_NS16550
config SYS_NS16550
bool "NS16550 UART or compatible"
help
Support NS16550 UART or compatible. This can be enabled in the
device tree with the correct input clock frequency. If the input
clock frequency is not defined in the device tree, the macro
CFG_SYS_NS16550_CLK defined in a legacy board header file will
be used. It can be a constant or a function to get clock, eg,
get_serial_clock().
config NS16550_DYNAMIC
bool "Allow NS16550 to be configured at runtime"
depends on SYS_NS16550
default y if SYS_COREBOOT || SYS_SLIMBOOTLOADER
help
Enable this option to allow device-tree control of the driver.
Normally this driver is controlled by the following options:
It is not a good practice for a driver to be statically configured,
since it prevents the same driver being used for different types of
UARTs in a system. This option avoids this problem at the cost of a
slightly increased code size.
config SYS_NS16550_MEM32
bool "If memory-mapped, 32bit access is needed for ns16550 register access"
depends on SYS_NS16550
help
If enabled, if memory-mapped, indicates that 32-bit access should be
used (instead of 8-bit) for register access.
config SYS_NS16550_PORT_MAPPED
bool "Port I/O is used for ns16550 register access"
depends on SYS_NS16550
help
If enabled, port I/O is used for ns16550 register access. If not
enabled, then the UART is memory-mapped.
config SYS_NS16550_REG_SIZE
int "ns16550 register width and endianness"
depends on SYS_NS16550_SERIAL || SPL_SYS_NS16550_SERIAL
range -4 4
default -4 if ARCH_OMAP2PLUS || ARCH_SUNXI
default 1
help
Indicates register width and also endianness. If positive, big-endian
access is used. If negative, little-endian is used.
config SPL_NS16550_MIN_FUNCTIONS
bool "Only provide NS16550_init and NS16550_putc in SPL"
depends on SPL_SYS_NS16550_SERIAL && PPC
help
Enable this if you desire to only have use of the NS16550_init and
NS16550_putc functions for the serial driver located at
drivers/serial/ns16550.c. This option is useful for saving space for
already greatly restricted images, including but not limited to
NAND_SPL configurations.
config INTEL_MID_SERIAL
bool "Intel MID platform UART support"
depends on DM_SERIAL && OF_CONTROL
depends on INTEL_MID
select SYS_NS16550
help
Select this to enable a UART for Intel MID platforms.
This uses the ns16550 driver as a library.
config PL011_SERIAL
bool "ARM PL011 driver"
depends on !DM_SERIAL
help
Select this to enable a UART for platforms using PL011.
config PL01X_SERIAL
bool "ARM PL010 and PL011 driver"
depends on DM_SERIAL
help
Select this to enable a UART for platforms using PL010 or PL011.
config ROCKCHIP_SERIAL
bool "Rockchip on-chip UART support"
depends on DM_SERIAL
select SYS_NS16550
help
Select this to enable a debug UART for Rockchip devices when using
OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
This uses the ns16550 driver, converting the platdata from of-platdata
to the ns16550 format.
config S5P_SERIAL
bool "Support for Samsung S5P UART"
depends on ARCH_APPLE || ARCH_EXYNOS || ARCH_S5PC1XX
default y
help
Select this to enable Samsung S5P UART support.
config S5P4418_PL011_SERIAL
bool "Extended PL011 driver for S5P4418"
depends on DM_SERIAL && PL01X_SERIAL && ARCH_NEXELL
default y
help
Select this to enable support of the PL011 UARTs in the S5P4418 SOC.
With this driver the UART-clocks are set to the appropriate rate
(if not 'skip-init').
config SANDBOX_SERIAL
bool "Sandbox UART support"
depends on SANDBOX
imply SERIAL_PUTS
help
Select this to enable a seral UART for sandbox. This is required to
operate correctly, otherwise you will see no serial output from
sandbox. The emulated UART will display to the console and console
input will be fed into the UART. This allows you to interact with
U-Boot.
The operation of the console is controlled by the -t command-line
flag. In raw mode, U-Boot sees all characters from the terminal
before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
is processed by the terminal, and terminates U-Boot. Valid options
are:
-t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot
-t raw Raw mode, Ctrl-C is processed by U-Boot
-t cooked Cooked mode, Ctrl-C terminates
config SCIF_CONSOLE
bool "Renesas SCIF UART support"
depends on SH || ARCH_RMOBILE
help
Select this to enable Renesas SCIF UART. To operate serial ports
on systems with RCar or SH SoCs, say Y to this option. If unsure,
say N.
choice
prompt "SCIF console port"
depends on SCIF_CONSOLE && (!DM_SERIAL || (SPL && !SPL_DM_SERIAL))
config CONS_SCIF0
bool "SCIF0"
config CONS_SCIF1
bool "SCIF1"
config CONS_SCIF2
bool "SCIF2"
config CONS_SCIF4
bool "SCIF4"
config CONS_SCIFA0
bool "SCIFA0"
endchoice
config SH_SCIF_CLK_FREQ
int "SCIF console clock frequency"
depends on SCIF_CONSOLE && (!DM_SERIAL || (SPL && !SPL_DM_SERIAL))
default 65000000
config SEMIHOSTING_SERIAL
bool "Semihosting UART support"
depends on SEMIHOSTING && !SERIAL_RX_BUFFER
imply SERIAL_PUTS
help
Select this to enable a serial UART using semihosting. Special halt
instructions will be issued which an external debugger (such as a
JTAG emulator) may interpret. The debugger will display U-Boot's
console output on the host system.
Enable this option only if you are using a debugger which supports
semihosting. If you are not using a debugger, this driver will halt
the boot.
config UNIPHIER_SERIAL
bool "Support for UniPhier on-chip UART"
depends on ARCH_UNIPHIER
default y
help
If you have a UniPhier based board and want to use the on-chip
serial ports, say Y to this option. If unsure, say N.
config XILINX_UARTLITE
bool "Xilinx Uarlite support"
depends on DM_SERIAL
help
If you have a Xilinx based board and want to use the uartlite
serial ports, say Y to this option. If unsure, say N.
config MESON_SERIAL
bool "Support for Amlogic Meson UART"
depends on DM_SERIAL && ARCH_MESON
help
If you have an Amlogic Meson based board and want to use the on-chip
serial ports, say Y to this option. If unsure, say N.
config MSM_SERIAL
bool "Qualcomm on-chip UART"
depends on DM_SERIAL
help
Support Data Mover UART used on Qualcomm Snapdragon SoCs.
It should support all Qualcomm devices with UARTDM version 1.4,
for example APQ8016 and MSM8916.
Single baudrate is supported in current implementation (115200).
config MSM_GENI_SERIAL
bool "Qualcomm on-chip GENI UART"
select MISC
imply QCOM_GENI_SE
help
Support UART based on Generic Interface (GENI) Serial Engine (SE),
used on Qualcomm Snapdragon SoCs. Should support all qualcomm SOCs
with Qualcomm Universal Peripheral (QUP) Wrapper cores,
i.e. newer ones, starting from SDM845.
Driver works in FIFO mode.
Multiple baudrates supported.
config MXS_AUART_SERIAL
bool "MXS AUART"
depends on DM_SERIAL
help
Support for Freescale i.MX23 / i.MX28 AUART or Application UART IP.
This IP is present in the aforementioned SoCs, however this is not
the IP used to drive the Debug UART port, for that see PL01X_SERIAL .
config OCTEON_SERIAL_BOOTCMD
bool "MIPS Octeon PCI remote bootcmd input"
depends on ARCH_OCTEON
depends on DM_SERIAL
select SYS_IS_IN_ENV
select CONSOLE_MUX
help
This driver supports remote input over the PCIe bus from a host
to U-Boot for entering commands. It is utilized by the host
commands 'oct-remote-load' and 'oct-remote-bootcmd'.
config OCTEON_SERIAL_PCIE_CONSOLE
bool "MIPS Octeon PCIe remote console"
depends on ARCH_OCTEON
depends on (DM_SERIAL && DM_STDIO)
select SYS_STDIO_DEREGISTER
select SYS_CONSOLE_IS_IN_ENV
select CONSOLE_MUX
help
This driver supports remote console over the PCIe bus when the
Octeon is running in PCIe target mode. The host program
'oct-remote-console' can be used to connect to this console.
The console number will likely be 0 or 1.
config OMAP_SERIAL
bool "Support for OMAP specific UART"
depends on DM_SERIAL
default y if (ARCH_OMAP2PLUS || ARCH_K3)
select SYS_NS16550
help
If you have an TI based SoC and want to use the on-chip serial
port, say Y to this option. If unsure say N.
config OWL_SERIAL
bool "Actions Semi OWL UART"
depends on DM_SERIAL && ARCH_OWL
help
If you have a Actions Semi OWL based board and want to use the on-chip
serial port, say Y to this option. If unsure, say N.
Single baudrate is supported in current implementation (115200).
config HTIF_CONSOLE
bool "RISC-V HTIF console support"
depends on DM_SERIAL && 64BIT
help
Select this to enable host transfer interface (HTIF) based serial
console. The HTIF device is quite common in RISC-V emulators and
RISC-V ISS so this driver allows using U-Boot on such platforms.
config SIFIVE_SERIAL
bool "SiFive UART support"
depends on DM_SERIAL
help
This driver supports the SiFive UART. If unsure say N.
config STI_ASC_SERIAL
bool "STMicroelectronics on-chip UART"
depends on DM_SERIAL && ARCH_STI
help
Select this to enable Asynchronous Serial Controller available
on STiH410 SoC. This is a basic implementation, it supports
following baudrate 9600, 19200, 38400, 57600 and 115200.
config STM32_SERIAL
bool "STMicroelectronics STM32 SoCs on-chip UART"
depends on DM_SERIAL && (STM32F4 || STM32F7 || STM32H7 || ARCH_STM32MP)
help
If you have a machine based on a STM32 F4, F7, H7 or MP1 SOC
you can enable its onboard serial ports, say Y to this option.
If unsure, say N.
config ZYNQ_SERIAL
bool "Cadence (Xilinx Zynq) UART support"
depends on DM_SERIAL
help
This driver supports the Cadence UART. It is found e.g. in Xilinx
Zynq/ZynqMP.
config MTK_SERIAL
bool "MediaTek High-speed UART support"
depends on DM_SERIAL
help
Select this to enable UART support for MediaTek High-speed UART
devices. This driver uses driver model and requires a device
tree binding to operate.
The High-speed UART is compatible with the ns16550a UART and have
its own high-speed registers.
config MT7620_SERIAL
bool "UART driver for MediaTek MT7620 and earlier SoCs"
depends on DM_SERIAL
help
Select this to enable UART support for MediaTek MT7620 and earlier
SoCs. This driver uses driver model and requires a device tree
binding to operate.
The UART driver for MediaTek MT7620 and earlier SoCs is *NOT*
compatible with the ns16550a UART.
config MPC8XX_CONS
bool "Console driver for MPC8XX"
depends on MPC8xx
default y
config NPCM_SERIAL
bool "Nuvoton NPCM UART driver"
depends on DM_SERIAL
help
Select this to enable UART support for Nuvoton BMCs
(NPCM7xx and NPCM8xx).
The driver enables the onboard serial port with 8-N-1
configuration.
config XEN_SERIAL
bool "XEN serial support"
depends on XEN
help
If built without DM support, then requires Xen
to be built with CONFIG_VERBOSE_DEBUG.
choice
prompt "Console port"
default 8xx_CONS_SMC1
depends on MPC8XX_CONS
help
Depending on board, select one serial port
(CONFIG_8xx_CONS_SMC1 or CONFIG_8xx_CONS_SMC2)
config 8xx_CONS_SMC1
bool "SMC1"
config 8xx_CONS_SMC2
bool "SMC2"
endchoice
config SYS_SMC_RXBUFLEN
int "Console Rx buffer length"
depends on MPC8XX_CONS
default 1
help
With CONFIG_SYS_SMC_RXBUFLEN it is possible to define
the maximum receive buffer length for the SMC.
This option is actual only for 8xx possible.
If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE
must be defined, to setup the maximum idle timeout for
the SMC.
config SYS_MAXIDLE
int "maximum idle timeout"
depends on MPC8XX_CONS
default 0
config SYS_BRGCLK_PRESCALE
int "BRG Clock Prescale"
depends on MPC8XX_CONS
default 1
config SYS_SDSR
hex "SDSR Value"
depends on MPC8XX_CONS
default 0x83
config SYS_SDMR
hex "SDMR Value"
depends on MPC8XX_CONS
default 0x0
endif