# # Serial device configuration # menu "Serial drivers" config REQUIRE_SERIAL_CONSOLE bool "Require a serial port for console" # Running without a serial console is not supported by the # non-dm serial code depends on DM_SERIAL default y help Require a serial port for the console, and panic if none is found during serial port initialization (default y). Set this to n on boards which have no debug serial port whatsoever. config SERIAL_PRESENT bool "Provide a serial driver" depends on DM_SERIAL default y help In very space-constrained devices even the full UART driver is too large. In this case the debug UART can still be used in some cases. This option enables the full UART in U-Boot, so if is it disabled, the full UART driver will be omitted, thus saving space. config SPL_SERIAL_PRESENT bool "Provide a serial driver in SPL" depends on DM_SERIAL default y help In very space-constrained devices even the full UART driver is too large. In this case the debug UART can still be used in some cases. This option enables the full UART in SPL, so if is it disabled, the full UART driver will be omitted, thus saving space. config DM_SERIAL bool "Enable Driver Model for serial drivers" depends on DM help Enable driver model for serial. This replaces drivers/serial/serial.c with the serial uclass, which implements serial_putc() etc. The uclass interface is defined in include/serial.h. config DEBUG_UART bool "Enable an early debug UART for debugging" help The debug UART is intended for use very early in U-Boot to debug problems when an ICE or other debug mechanism is not available. To use it you should: - Make sure your UART supports this interface - Enable CONFIG_DEBUG_UART - Enable the CONFIG for your UART to tell it to provide this interface (e.g. CONFIG_DEBUG_UART_NS16550) - Define the required settings as needed (see below) - Call debug_uart_init() before use - Call debug_uart_putc() to output a character Depending on your platform it may be possible to use this UART before a stack is available. If your UART does not support this interface you can probably add support quite easily. Remember that you cannot use driver model and it is preferred to use no stack. You must not use this UART once driver model is working and the serial drivers are up and running (done in serial_init()). Otherwise the drivers may conflict and you will get strange output. choice prompt "Select which UART will provide the debug UART" depends on DEBUG_UART default DEBUG_UART_NS16550 config DEBUG_UART_ALTERA_JTAGUART bool "Altera JTAG UART" help Select this to enable a debug UART using the altera_jtag_uart driver. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_UART_ALTERA_UART bool "Altera UART" help Select this to enable a debug UART using the altera_uart driver. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_UART_AR933X bool "QCA/Atheros ar933x" depends on AR933X_UART help Select this to enable a debug UART using the ar933x uart driver. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_UART_NS16550 bool "ns16550" help Select this to enable a debug UART using the ns16550 driver. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_EFI_CONSOLE bool "EFI" depends on EFI_APP help Select this to enable a debug console which calls back to EFI to output to the console. This can be useful for early debugging of U-Boot when running on top of EFI (Extensive Firmware Interface). This is a type of BIOS used by PCs. config DEBUG_UART_S5P bool "Samsung S5P" help Select this to enable a debug UART using the serial_s5p driver. You will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. config DEBUG_UART_MESON bool "Amlogic Meson" depends on MESON_SERIAL help Select this to enable a debug UART using the serial_meson driver. You will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. config DEBUG_UART_UARTLITE bool "Xilinx Uartlite" help Select this to enable a debug UART using the serial_uartlite driver. You will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. config DEBUG_UART_ARM_DCC bool "ARM DCC" help Select this to enable a debug UART using the ARM JTAG DCC port. The DCC port can be used for very early debugging and doesn't require any additional setting like address/baudrate/clock. On systems without any serial interface this is the easiest way how to get console. Every ARM core has own DCC port which is the part of debug interface. This port is available at least on ARMv6, ARMv7, ARMv8 and XScale architectures. config DEBUG_MVEBU_A3700_UART bool "Marvell Armada 3700" help Select this to enable a debug UART using the serial_mvebu driver. You will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. config DEBUG_UART_ZYNQ bool "Xilinx Zynq" help Select this to enable a debug UART using the serial_zynq driver. You will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. config DEBUG_UART_APBUART depends on LEON3 bool "Gaisler APBUART" help Select this to enable a debug UART using the serial_leon3 driver. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_UART_PL010 bool "pl010" help Select this to enable a debug UART using the pl01x driver with the PL010 UART type. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_UART_PL011 bool "pl011" help Select this to enable a debug UART using the pl01x driver with the PL011 UART type. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_UART_PIC32 bool "Microchip PIC32" depends on PIC32_SERIAL help Select this to enable a debug UART using the serial_pic32 driver. You will need to provide parameters to make this work. The driver will be available until the real driver model serial is running. config DEBUG_UART_UNIPHIER bool "UniPhier on-chip UART" depends on ARCH_UNIPHIER help Select this to enable a debug UART using the UniPhier on-chip UART. You will need to provide DEBUG_UART_BASE to make this work. The driver will be available until the real driver-model serial is running. endchoice config DEBUG_UART_BASE hex "Base address of UART" depends on DEBUG_UART 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 DEBUG_UART_CLOCK int "UART input clock" depends on DEBUG_UART 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 " " 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" 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 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 FSL_LPUART bool "Freescale LPUART support" help Select this to enable a Low Power UART for Freescale VF610 and QorIQ Layerscape devices. config MVEBU_A3700_UART bool "UART support for Armada 3700" default n help Choose this option to add support for UART driver on the Marvell Armada 3700 SoC. The base address is configured via DT. config MXC_UART bool "IMX serial port support" depends on MX6 help If you have a machine based on a Motorola IMX CPU you can enable its onboard serial port by enabling this option. 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 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 CONFIG_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 ROCKCHIP_SERIAL bool "Rockchip on-chip UART support" depends on DM_SERIAL && SPL_OF_PLATDATA help Select this to enable a debug UART for Rockchip devices when using CONFIG_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 SANDBOX_SERIAL bool "Sandbox UART support" depends on SANDBOX 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 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 && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx) 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). endmenu