mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 04:23:46 +00:00
6822cf3ec7
Pasting longer lines into the U-Boot console prompt sometimes leads to characters missing. One problem here is the small 16-byte FIFO of the legacy NS16550 UART, e.g. on x86 platforms. This patch now introduces a Kconfig option to enable RX interrupt buffer support for NS16550 style UARTs. With this option enabled, I was able paste really long lines into the U-Boot console, without any characters missing. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Cc: Bin Meng <bmeng.cn@gmail.com> [trini: Guard ns16550_serial_remove with CONFIG_IS_ENABLED(SERIAL_PRESENT) to match struct assignment] Signed-off-by: Tom Rini <trini@konsulko.com>
565 lines
18 KiB
Text
565 lines
18 KiB
Text
#
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# Serial device configuration
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#
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menu "Serial drivers"
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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 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 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
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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 CONS_INDEX
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int "UART used for console"
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depends on ARCH_SUNXI
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default 2 if MACH_SUN5I
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default 5 if MACH_SUN8I_A23 || MACH_SUN8I_A33
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default 1
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help
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Configures the console index.
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For Allwinner SoC., default values are 2 for SUN5I and 5 for A23/A33.
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Otherwise, the index equals 1.
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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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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_IRQ_BUFFER
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bool "Enable RX interrupt buffer for serial input"
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depends on DM_SERIAL
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default n
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help
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Enable RX interrupt buffer support for the serial driver.
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This enables pasting longer strings, even when the RX FIFO
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of the UART is not big enough (e.g. 16 bytes on the normal
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NS16550).
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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
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default y if SPL && DM_SERIAL
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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
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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 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_UART_NS16550
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config DEBUG_UART_ALTERA_JTAGUART
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bool "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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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_UART_ATMEL
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bool "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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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_UART_S5P
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bool "Samsung S5P"
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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_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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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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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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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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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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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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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_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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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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endchoice
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config DEBUG_UART_BASE
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hex "Base address of UART"
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depends on DEBUG_UART
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help
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This is the base address of your UART for memory-mapped UARTs.
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A default should be provided by your board, but if not you will need
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to use the correct value here.
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config DEBUG_UART_CLOCK
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int "UART input clock"
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depends on DEBUG_UART
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help
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The UART input clock determines the speed of the internal UART
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circuitry. The baud rate is derived from this by dividing the input
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clock down.
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A default should be provided by your board, but if not you will need
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to use the correct value here.
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config DEBUG_UART_SHIFT
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int "UART register shift"
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depends on DEBUG_UART
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default 0 if DEBUG_UART
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help
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Some UARTs (notably ns16550) support different register layouts
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where the registers are spaced either as bytes, words or some other
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value. Use this value to specify the shift to use, where 0=byte
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registers, 2=32-bit word registers, etc.
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config DEBUG_UART_BOARD_INIT
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bool "Enable board-specific debug UART init"
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depends on DEBUG_UART
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help
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Some boards need to set things up before the debug UART can be used.
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On these boards a call to debug_uart_init() is insufficient. When
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this option is enabled, the function board_debug_uart_init() will
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be called when debug_uart_init() is called. You can put any code
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here that is needed to set up the UART ready for use, such as set
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pin multiplexing or enable clocks.
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config DEBUG_UART_ANNOUNCE
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bool "Show a message when the debug UART starts up"
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depends on DEBUG_UART
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help
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Enable this option to show a message when the debug UART is ready
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for use. You will see a message like "<debug_uart> " as soon as
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U-Boot has the UART ready for use (i.e. your code calls
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debug_uart_init()). This can be useful just as a check that
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everything is working.
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config DEBUG_UART_SKIP_INIT
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bool "Skip UART initialization"
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help
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Select this if the UART you want to use for debug output is already
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initialized by the time U-Boot starts its execution.
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config ALTERA_JTAG_UART
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bool "Altera JTAG UART support"
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depends on DM_SERIAL
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help
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Select this to enable an JTAG UART for Altera devices.The JTAG UART
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core implements a method to communicate serial character streams
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between a host PC and a Qsys system on an Altera FPGA. Please find
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details on the "Embedded Peripherals IP User Guide" of Altera.
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config ALTERA_JTAG_UART_BYPASS
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bool "Bypass output when no connection"
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depends on ALTERA_JTAG_UART
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help
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Bypass console output and keep going even if there is no JTAG
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terminal connection with the host. The console output will resume
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once the JTAG terminal is connected. Without the bypass, the console
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output will wait forever until a JTAG terminal is connected. If you
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not are sure, say Y.
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config ALTERA_UART
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bool "Altera UART support"
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depends on DM_SERIAL
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help
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Select this to enable an UART for Altera devices. Please find
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details on the "Embedded Peripherals IP User Guide" of Altera.
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config AR933X_UART
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bool "QCA/Atheros ar933x UART support"
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depends on DM_SERIAL && SOC_AR933X
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help
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Select this to enable UART support for QCA/Atheros ar933x
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devices. This driver uses driver model and requires a device
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tree binding to operate, please refer to the document at
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doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
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config ATMEL_USART
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bool "Atmel USART support"
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help
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Select this to enable USART support for Atmel SoCs. It can be
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configured in the device tree, and input clock frequency can
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be got from the clk node.
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config BCM6345_SERIAL
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bool "Support for BCM6345 UART"
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depends on DM_SERIAL && ARCH_BMIPS
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help
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Select this to enable UART on BCM6345 SoCs.
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config FSL_LPUART
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bool "Freescale LPUART support"
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help
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Select this to enable a Low Power UART for Freescale VF610 and
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QorIQ Layerscape devices.
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config MVEBU_A3700_UART
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bool "UART support for Armada 3700"
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default n
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help
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Choose this option to add support for UART driver on the Marvell
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Armada 3700 SoC. The base address is configured via DT.
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config MXC_UART
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bool "IMX serial port support"
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depends on MX5 || MX6
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help
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If you have a machine based on a Motorola IMX CPU you
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can enable its onboard serial port by enabling this option.
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config PIC32_SERIAL
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bool "Support for Microchip PIC32 on-chip UART"
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depends on DM_SERIAL && MACH_PIC32
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default y
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help
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Support for the UART found on Microchip PIC32 SoC's.
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config SYS_NS16550
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bool "NS16550 UART or compatible"
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help
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Support NS16550 UART or compatible. This can be enabled in the
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device tree with the correct input clock frequency. If the input
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clock frequency is not defined in the device tree, the macro
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CONFIG_SYS_NS16550_CLK defined in a legacy board header file will
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be used. It can be a constant or a function to get clock, eg,
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get_serial_clock().
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config INTEL_MID_SERIAL
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bool "Intel MID platform UART support"
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depends on DM_SERIAL && OF_CONTROL
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depends on INTEL_MID
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select SYS_NS16550
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help
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Select this to enable a UART for Intel MID platforms.
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This uses the ns16550 driver as a library.
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config ROCKCHIP_SERIAL
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bool "Rockchip on-chip UART support"
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depends on DM_SERIAL && SPL_OF_PLATDATA
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help
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Select this to enable a debug UART for Rockchip devices when using
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CONFIG_SPL_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
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This uses the ns16550 driver, converting the platdata from of-platdata
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to the ns16550 format.
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config SANDBOX_SERIAL
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bool "Sandbox UART support"
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depends on SANDBOX
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help
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Select this to enable a seral UART for sandbox. This is required to
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operate correctly, otherwise you will see no serial output from
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sandbox. The emulated UART will display to the console and console
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input will be fed into the UART. This allows you to interact with
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U-Boot.
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The operation of the console is controlled by the -t command-line
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flag. In raw mode, U-Boot sees all characters from the terminal
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before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
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is processed by the terminal, and terminates U-Boot. Valid options
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are:
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-t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot
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-t raw Raw mode, Ctrl-C is processed by U-Boot
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-t cooked Cooked mode, Ctrl-C terminates
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config UNIPHIER_SERIAL
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bool "Support for UniPhier on-chip UART"
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depends on ARCH_UNIPHIER
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default y
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help
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If you have a UniPhier based board and want to use the on-chip
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serial ports, say Y to this option. If unsure, say N.
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config XILINX_UARTLITE
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bool "Xilinx Uarlite support"
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depends on DM_SERIAL && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx)
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help
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If you have a Xilinx based board and want to use the uartlite
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serial ports, say Y to this option. If unsure, say N.
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config MESON_SERIAL
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bool "Support for Amlogic Meson UART"
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depends on DM_SERIAL && ARCH_MESON
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help
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If you have an Amlogic Meson based board and want to use the on-chip
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serial ports, say Y to this option. If unsure, say N.
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config MSM_SERIAL
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bool "Qualcomm on-chip UART"
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depends on DM_SERIAL
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help
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Support Data Mover UART used on Qualcomm Snapdragon SoCs.
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It should support all Qualcomm devices with UARTDM version 1.4,
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for example APQ8016 and MSM8916.
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Single baudrate is supported in current implementation (115200).
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config PXA_SERIAL
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bool "PXA serial port support"
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help
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If you have a machine based on a Marvell XScale PXA2xx CPU you
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can enable its onboard serial ports by enabling this option.
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config STI_ASC_SERIAL
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bool "STMicroelectronics on-chip UART"
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depends on DM_SERIAL && ARCH_STI
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help
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Select this to enable Asynchronous Serial Controller available
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on STiH410 SoC. This is a basic implementation, it supports
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following baudrate 9600, 19200, 38400, 57600 and 115200.
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config MPC8XX_CONS
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bool "Console driver for MPC8XX"
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depends on 8xx
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default y
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choice
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prompt "Console port"
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default 8xx_CONS_SMC1
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depends on MPC8XX_CONS
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help
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Depending on board, select one serial port
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(CONFIG_8xx_CONS_SMC1 or CONFIG_8xx_CONS_SMC2)
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config 8xx_CONS_SMC1
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bool "SMC1"
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config 8xx_CONS_SMC2
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bool "SMC2"
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endchoice
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config SYS_SMC_RXBUFLEN
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int "Console Rx buffer length"
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depends on MPC8XX_CONS
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default 1
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help
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With CONFIG_SYS_SMC_RXBUFLEN it is possible to define
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the maximum receive buffer length for the SMC.
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This option is actual only for 8xx possible.
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If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE
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must be defined, to setup the maximum idle timeout for
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the SMC.
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config SYS_MAXIDLE
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int "maximum idle timeout"
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depends on MPC8XX_CONS
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default 0
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config SYS_BRGCLK_PRESCALE
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int "BRG Clock Prescale"
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depends on MPC8XX_CONS
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default 1
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config SYS_SDSR
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hex "SDSR Value"
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depends on MPC8XX_CONS
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default 0x83
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config SYS_SDMR
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hex "SDMR Value"
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depends on MPC8XX_CONS
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default 0
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endmenu
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