mirror of
https://github.com/AsahiLinux/u-boot
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bd9ff681bd
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>
1160 lines
37 KiB
Text
1160 lines
37 KiB
Text
#
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# Serial device configuration
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#
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menuconfig SERIAL
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bool "Serial"
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default y
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help
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Enable support for serial drivers. This allows use of a serial UART
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for displaying messages while U-Boot is running. It also brings in
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printf() and panic() functions. This should normally be enabled
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unless there are space reasons not to. If you just need to disable
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the console you can adjust the stdout environment variable or use
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SILENT_CONSOLE.
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if SERIAL
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config BAUDRATE
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int "Default baudrate"
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default 115200
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help
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Select a default baudrate, where "default" has a driver-specific
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meaning of either setting the baudrate for the early debug UART
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in the SPL stage (most drivers) or for choosing a default baudrate
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in the absence of an environment setting (serial_mxc.c).
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config OF_SERIAL_BAUD
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bool "Fetch serial baudrate from device tree"
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depends on DM_SERIAL && SPL_ENV_SUPPORT
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select DEFAULT_ENV_IS_RW
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help
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Select this to enable fetching and setting of the baudrate
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configured in the DT. Replace the default baudrate with the DT
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baudrate and also set it to the environment.
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config DEFAULT_ENV_IS_RW
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bool "Make default environment as writable"
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help
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Select this to enable to make default environment writable. This
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allows modifying the default environment.
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config REQUIRE_SERIAL_CONSOLE
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bool "Require a serial port for console"
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# Running without a serial console is not supported by the
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# non-dm serial code
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depends on DM_SERIAL
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default y
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help
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Require a serial port for the console, and panic if none is found
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during serial port initialization (default y). Set this to n on
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boards which have no debug serial port whatsoever.
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config SPECIFY_CONSOLE_INDEX
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bool "Specify the port number used for console"
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default y if !DM_SERIAL || (SPL && !SPL_DM_SERIAL) || \
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(TPL && !TPL_DM_SERIAL)
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help
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In various cases, we need to specify which of the UART devices that
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a board or SoC has available are to be used for the console device
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in U-Boot.
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config SERIAL_PRESENT
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bool "Provide a serial driver"
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depends on DM_SERIAL
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default y
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help
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In very space-constrained devices even the full UART driver is too
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large. In this case the debug UART can still be used in some cases.
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This option enables the full UART in U-Boot, so if is it disabled,
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the full UART driver will be omitted, thus saving space.
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config SPL_SERIAL_PRESENT
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bool "Provide a serial driver in SPL"
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depends on DM_SERIAL && SPL
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default y
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help
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In very space-constrained devices even the full UART driver is too
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large. In this case the debug UART can still be used in some cases.
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This option enables the full UART in SPL, so if is it disabled,
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the full UART driver will be omitted, thus saving space.
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config TPL_SERIAL_PRESENT
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bool "Provide a serial driver in TPL"
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depends on DM_SERIAL && TPL
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default y
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help
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In very space-constrained devices even the full UART driver is too
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large. In this case the debug UART can still be used in some cases.
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This option enables the full UART in TPL, so if is it disabled,
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the full UART driver will be omitted, thus saving space.
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config VPL_SERIAL_PRESENT
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bool "Provide a serial driver in VPL"
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depends on DM_SERIAL && VPL
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default y
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help
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In very space-constrained devices even the full UART driver is too
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large. In this case the debug UART can still be used in some cases.
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This option enables the full UART in TPL, so if is it disabled,
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the full UART driver will be omitted, thus saving space.
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config CONS_INDEX
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int "UART used for console"
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depends on SPECIFY_CONSOLE_INDEX
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range 0 6
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default 1
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help
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Set this to match the UART number of the serial console.
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config DM_SERIAL
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bool "Enable Driver Model for serial drivers"
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depends on DM
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select SYS_MALLOC_F
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help
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Enable driver model for serial. This replaces
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drivers/serial/serial.c with the serial uclass, which
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implements serial_putc() etc. The uclass interface is
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defined in include/serial.h.
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config SERIAL_RX_BUFFER
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bool "Enable RX buffer for serial input"
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depends on DM_SERIAL
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help
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Enable RX buffer support for the serial driver. This enables
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pasting longer strings, even when the RX FIFO of the UART is
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not big enough (e.g. 16 bytes on the normal NS16550).
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config SERIAL_RX_BUFFER_SIZE
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int "RX buffer size"
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depends on SERIAL_RX_BUFFER
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default 256
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help
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The size of the RX buffer (needs to be power of 2)
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config SERIAL_PUTS
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bool "Enable printing strings all at once"
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depends on DM_SERIAL
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help
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Some serial drivers are much more efficient when printing multiple
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characters at once rather than printing characters individually. This
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can be because they can load a fifo, or because individual print
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calls have a constant overhead. With this option set, the serial
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subsystem will try to provide serial drivers with as many characters
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at once as possible, instead of printing characters one by one. Most
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serial drivers do not need this config to print efficiently. If
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unsure, say N.
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config SERIAL_SEARCH_ALL
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bool "Search for serial devices after default one failed"
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depends on DM_SERIAL
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help
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The serial subsystem only searches for a single serial device
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that was instantiated, but does not check whether it was probed
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correctly. With this option set, we make successful probing
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mandatory and search for fallback serial devices if the default
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device does not work.
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If unsure, say N.
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config SERIAL_PROBE_ALL
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bool "Probe all available serial devices"
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depends on DM_SERIAL
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help
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The serial subsystem only probes for a single serial device,
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but does not probe for other remaining serial devices.
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With this option set, we make probing and searching for
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all available devices optional.
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Normally, U-Boot talks to one serial port at a time, but SBSA
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compliant UART devices like PL011 require initialization
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by firmware and to let the kernel use serial port for sending
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and receiving the characters.
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If unsure, say N.
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config SPL_DM_SERIAL
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bool "Enable Driver Model for serial drivers in SPL"
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depends on DM_SERIAL && SPL_DM
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default y
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help
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Enable driver model for serial in SPL. This replaces
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drivers/serial/serial.c with the serial uclass, which
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implements serial_putc() etc. The uclass interface is
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defined in include/serial.h.
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config TPL_DM_SERIAL
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bool "Enable Driver Model for serial drivers in TPL"
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depends on DM_SERIAL && TPL_DM
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default y if TPL && DM_SERIAL
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help
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Enable driver model for serial in TPL. This replaces
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drivers/serial/serial.c with the serial uclass, which
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implements serial_putc() etc. The uclass interface is
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defined in include/serial.h.
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config VPL_DM_SERIAL
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bool "Enable Driver Model for serial drivers in VPL"
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depends on DM_SERIAL
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default y if VPL && DM_SERIAL
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help
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Enable driver model for serial in VPL. This replaces
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drivers/serial/serial.c with the serial uclass, which
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implements serial_putc() etc. The uclass interface is
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defined in include/serial.h.
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config DEBUG_UART
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bool "Enable an early debug UART for debugging"
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help
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The debug UART is intended for use very early in U-Boot to debug
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problems when an ICE or other debug mechanism is not available.
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To use it you should:
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- Make sure your UART supports this interface
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- Enable CONFIG_DEBUG_UART
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- Enable the CONFIG for your UART to tell it to provide this interface
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(e.g. CONFIG_DEBUG_UART_NS16550)
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- Define the required settings as needed (see below)
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- Call debug_uart_init() before use
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- Call debug_uart_putc() to output a character
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Depending on your platform it may be possible to use this UART before
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a stack is available.
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If your UART does not support this interface you can probably add
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support quite easily. Remember that you cannot use driver model and
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it is preferred to use no stack.
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You must not use this UART once driver model is working and the
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serial drivers are up and running (done in serial_init()). Otherwise
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the drivers may conflict and you will get strange output.
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choice
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prompt "Select which UART will provide the debug UART"
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depends on DEBUG_UART
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default DEBUG_SBI_CONSOLE if RISCV_SMODE
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default DEBUG_UART_NS16550
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config DEBUG_UART_ALTERA_JTAGUART
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bool "Altera JTAG UART"
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depends on ALTERA_JTAG_UART
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help
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Select this to enable a debug UART using the altera_jtag_uart driver.
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You will need to provide parameters to make this work. The driver will
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be available until the real driver model serial is running.
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config DEBUG_UART_ALTERA_UART
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bool "Altera UART"
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depends on ALTERA_UART
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help
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Select this to enable a debug UART using the altera_uart driver.
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You will need to provide parameters to make this work. The driver will
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be available until the real driver model serial is running.
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config DEBUG_UART_AR933X
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bool "QCA/Atheros ar933x"
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depends on AR933X_UART
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help
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Select this to enable a debug UART using the ar933x uart driver.
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You will need to provide parameters to make this work. The
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driver will be available until the real driver model serial is
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running.
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config DEBUG_ARC_SERIAL
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bool "ARC UART"
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depends on ARC_SERIAL
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help
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Select this to enable a debug UART using the ARC UART driver.
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You will need to provide parameters to make this work. The
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driver will be available until the real driver model serial is
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running.
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config DEBUG_UART_ATMEL
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bool "Atmel USART"
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depends on ATMEL_USART
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help
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Select this to enable a debug UART using the atmel usart driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_BCM6345
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bool "BCM6345 UART"
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depends on BCM6345_SERIAL
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help
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Select this to enable a debug UART on BCM6345 SoCs. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver model serial is running.
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config DEBUG_UART_NS16550
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bool "ns16550"
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depends on SYS_NS16550
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help
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Select this to enable a debug UART using the ns16550 driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver model serial is running.
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config DEBUG_EFI_CONSOLE
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bool "EFI"
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depends on EFI_APP
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help
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Select this to enable a debug console which calls back to EFI to
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output to the console. This can be useful for early debugging of
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U-Boot when running on top of EFI (Extensive Firmware Interface).
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This is a type of BIOS used by PCs.
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config DEBUG_SBI_CONSOLE
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bool "SBI"
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depends on RISCV_SMODE
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help
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Select this to enable a debug console which calls back to SBI to
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output to the console. This can be useful for early debugging of
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U-Boot when running on top of SBI (Supervisor Binary Interface).
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This implementation of the debug UART is not available while in
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M-mode (e.g. during SPL).
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config DEBUG_UART_S5P
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bool "Samsung S5P"
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depends on ARCH_APPLE || ARCH_EXYNOS || ARCH_S5PC1XX
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help
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Select this to enable a debug UART using the serial_s5p driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_MSM_GENI
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bool "Qualcomm snapdragon"
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depends on ARCH_SNAPDRAGON
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help
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Select this to enable a debug UART using the serial_msm driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_MESON
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bool "Amlogic Meson"
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depends on MESON_SERIAL
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help
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Select this to enable a debug UART using the serial_meson driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_UARTLITE
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bool "Xilinx Uartlite"
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depends on XILINX_UARTLITE
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help
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Select this to enable a debug UART using the serial_uartlite driver.
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You will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_ARM_DCC
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bool "ARM DCC"
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depends on ARM_DCC
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help
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Select this to enable a debug UART using the ARM JTAG DCC port.
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The DCC port can be used for very early debugging and doesn't require
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any additional setting like address/baudrate/clock. On systems without
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any serial interface this is the easiest way how to get console.
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Every ARM core has own DCC port which is the part of debug interface.
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This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
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architectures.
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config DEBUG_MVEBU_A3700_UART
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bool "Marvell Armada 3700"
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depends on MVEBU_A3700_UART
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help
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Select this to enable a debug UART using the serial_mvebu driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_ZYNQ
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bool "Xilinx Zynq"
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depends on ZYNQ_SERIAL
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help
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Select this to enable a debug UART using the serial_zynq driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_APBUART
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depends on LEON3
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bool "Gaisler APBUART"
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help
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Select this to enable a debug UART using the serial_leon3 driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver model serial is running.
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config DEBUG_UART_PL010
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bool "pl010"
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depends on PL01X_SERIAL
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help
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Select this to enable a debug UART using the pl01x driver with the
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PL010 UART type. You will need to provide parameters to make this
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work. The driver will be available until the real driver model
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serial is running.
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config DEBUG_UART_PL011
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bool "pl011"
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depends on PL01X_SERIAL || PL011_SERIAL
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help
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Select this to enable a debug UART using the pl01x driver with the
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PL011 UART type. You will need to provide parameters to make this
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work. The driver will be available until the real driver model
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serial is running.
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config DEBUG_UART_PIC32
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bool "Microchip PIC32"
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depends on PIC32_SERIAL
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help
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Select this to enable a debug UART using the serial_pic32 driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver model serial is running.
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config DEBUG_UART_MXC
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bool "IMX Serial port"
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depends on MXC_UART
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help
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Select this to enable a debug UART using the serial_mxc driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver model serial is running.
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config DEBUG_UART_SANDBOX
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bool "sandbox"
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depends on SANDBOX_SERIAL
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help
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Select this to enable the debug UART using the sandbox driver. This
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provides basic serial output from the console without needing to
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start up driver model. The driver will be available until the real
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driver model serial is running.
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config DEBUG_UART_SEMIHOSTING
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bool "semihosting"
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depends on SEMIHOSTING_SERIAL
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help
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Select this to enable the debug UART using the semihosting driver.
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This provides basic serial output from the console without needing to
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start up driver model. The driver will be available until the real
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driver model serial is running.
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config DEBUG_UART_SCIF
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bool "Renesas SCIF UART"
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depends on SH || ARCH_RMOBILE
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help
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Select this to enable a debug UART using the serial_sh driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_SIFIVE
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bool "SiFive UART"
|
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depends on SIFIVE_SERIAL
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help
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Select this to enable a debug UART using the serial_sifive driver. You
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will need to provide parameters to make this work. The driver will
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be available until the real driver-model serial is running.
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config DEBUG_UART_STM32
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bool "STMicroelectronics STM32"
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depends on STM32_SERIAL
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help
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Select this to enable a debug UART using the serial_stm32 driver
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You will need to provide parameters to make this work.
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The driver will be available until the real driver model
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serial is running.
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config DEBUG_UART_UNIPHIER
|
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bool "UniPhier on-chip UART"
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depends on ARCH_UNIPHIER
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help
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|
Select this to enable a debug UART using the UniPhier on-chip UART.
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|
You will need to provide DEBUG_UART_BASE to make this work. The
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driver will be available until the real driver-model serial is
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running.
|
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config DEBUG_UART_OMAP
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|
bool "OMAP uart"
|
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depends on OMAP_SERIAL
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help
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Select this to enable a debug UART using the omap ns16550 driver.
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You will need to provide parameters to make this work. The driver
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will be available until the real driver model serial is running.
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config DEBUG_UART_MTK
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bool "MediaTek High-speed UART"
|
|
depends on MTK_SERIAL
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help
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|
Select this to enable a debug UART using the MediaTek High-speed
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UART driver.
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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.
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config MXS_AUART_SERIAL
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bool "MXS AUART"
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depends on DM_SERIAL
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help
|
|
Support for Freescale i.MX23 / i.MX28 AUART or Application UART IP.
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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 .
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config OCTEON_SERIAL_BOOTCMD
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bool "MIPS Octeon PCI remote bootcmd input"
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depends on ARCH_OCTEON
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depends on DM_SERIAL
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select SYS_IS_IN_ENV
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select CONSOLE_MUX
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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'.
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|
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config OCTEON_SERIAL_PCIE_CONSOLE
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bool "MIPS Octeon PCIe remote console"
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depends on ARCH_OCTEON
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depends on (DM_SERIAL && DM_STDIO)
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select SYS_STDIO_DEREGISTER
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select SYS_CONSOLE_IS_IN_ENV
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select CONSOLE_MUX
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help
|
|
This driver supports remote console over the PCIe bus when the
|
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Octeon is running in PCIe target mode. The host program
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'oct-remote-console' can be used to connect to this console.
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The console number will likely be 0 or 1.
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config OMAP_SERIAL
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bool "Support for OMAP specific UART"
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depends on DM_SERIAL
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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.
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|
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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).
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|
|
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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.
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|
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config SIFIVE_SERIAL
|
|
bool "SiFive UART support"
|
|
depends on DM_SERIAL
|
|
help
|
|
This driver supports the SiFive UART. If unsure say N.
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|
|
|
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.
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|
|
|
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.
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|
|
|
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
|