1da333ae7SMasahiro Yamadaconfig DM_SERIAL 2da333ae7SMasahiro Yamada bool "Enable Driver Model for serial drivers" 3da333ae7SMasahiro Yamada depends on DM 4da333ae7SMasahiro Yamada help 5f94a1bedSSimon Glass Enable driver model for serial. This replaces 6f94a1bedSSimon Glass drivers/serial/serial.c with the serial uclass, which 7f94a1bedSSimon Glass implements serial_putc() etc. The uclass interface is 8f94a1bedSSimon Glass defined in include/serial.h. 9ff247b7aSMasahiro Yamada 102f964aa7SSimon Glassconfig DEBUG_UART 112f964aa7SSimon Glass bool "Enable an early debug UART for debugging" 122f964aa7SSimon Glass help 132f964aa7SSimon Glass The debug UART is intended for use very early in U-Boot to debug 142f964aa7SSimon Glass problems when an ICE or other debug mechanism is not available. 152f964aa7SSimon Glass 162f964aa7SSimon Glass To use it you should: 172f964aa7SSimon Glass - Make sure your UART supports this interface 182f964aa7SSimon Glass - Enable CONFIG_DEBUG_UART 192f964aa7SSimon Glass - Enable the CONFIG for your UART to tell it to provide this interface 202f964aa7SSimon Glass (e.g. CONFIG_DEBUG_UART_NS16550) 212f964aa7SSimon Glass - Define the required settings as needed (see below) 222f964aa7SSimon Glass - Call debug_uart_init() before use 232f964aa7SSimon Glass - Call debug_uart_putc() to output a character 242f964aa7SSimon Glass 252f964aa7SSimon Glass Depending on your platform it may be possible to use this UART before 262f964aa7SSimon Glass a stack is available. 272f964aa7SSimon Glass 282f964aa7SSimon Glass If your UART does not support this interface you can probably add 292f964aa7SSimon Glass support quite easily. Remember that you cannot use driver model and 302f964aa7SSimon Glass it is preferred to use no stack. 312f964aa7SSimon Glass 322f964aa7SSimon Glass You must not use this UART once driver model is working and the 332f964aa7SSimon Glass serial drivers are up and running (done in serial_init()). Otherwise 342f964aa7SSimon Glass the drivers may conflict and you will get strange output. 352f964aa7SSimon Glass 3621d00436SSimon Glasschoice 3721d00436SSimon Glass prompt "Select which UART will provide the debug UART" 3821d00436SSimon Glass depends on DEBUG_UART 3921d00436SSimon Glass 4021d00436SSimon Glassconfig DEBUG_UART_NS16550 4121d00436SSimon Glass bool "ns16550" 4221d00436SSimon Glass help 4321d00436SSimon Glass Select this to enable a debug UART using the ns16550 driver. You 4421d00436SSimon Glass will need to provide parameters to make this work. The driver will 4521d00436SSimon Glass be available until the real driver model serial is running. 4621d00436SSimon Glass 47275854baSSimon Glassconfig DEBUG_EFI_CONSOLE 48275854baSSimon Glass bool "EFI" 49275854baSSimon Glass depends on EFI_APP 50275854baSSimon Glass help 51275854baSSimon Glass Select this to enable a debug console which calls back to EFI to 52275854baSSimon Glass output to the console. This can be useful for early debugging of 53275854baSSimon Glass U-Boot when running on top of EFI (Extensive Firmware Interface). 54275854baSSimon Glass This is a type of BIOS used by PCs. 55275854baSSimon Glass 56*bf6e7022SSimon Glassconfig DEBUG_UART_S5P 57*bf6e7022SSimon Glass bool "Samsung S5P" 58*bf6e7022SSimon Glass help 59*bf6e7022SSimon Glass Select this to enable a debug UART using the serial_s5p driver. You 60*bf6e7022SSimon Glass will need to provide parameters to make this work. The driver will 61*bf6e7022SSimon Glass be available until the real driver-model serial is running. 62*bf6e7022SSimon Glass 6321d00436SSimon Glassendchoice 6421d00436SSimon Glass 652f964aa7SSimon Glassconfig DEBUG_UART_BASE 662f964aa7SSimon Glass hex "Base address of UART" 672f964aa7SSimon Glass depends on DEBUG_UART 682f964aa7SSimon Glass help 692f964aa7SSimon Glass This is the base address of your UART for memory-mapped UARTs. 702f964aa7SSimon Glass 712f964aa7SSimon Glass A default should be provided by your board, but if not you will need 722f964aa7SSimon Glass to use the correct value here. 732f964aa7SSimon Glass 742f964aa7SSimon Glassconfig DEBUG_UART_CLOCK 752f964aa7SSimon Glass int "UART input clock" 762f964aa7SSimon Glass depends on DEBUG_UART 772f964aa7SSimon Glass help 782f964aa7SSimon Glass The UART input clock determines the speed of the internal UART 792f964aa7SSimon Glass circuitry. The baud rate is derived from this by dividing the input 802f964aa7SSimon Glass clock down. 812f964aa7SSimon Glass 822f964aa7SSimon Glass A default should be provided by your board, but if not you will need 832f964aa7SSimon Glass to use the correct value here. 842f964aa7SSimon Glass 85dd0b0122SSimon Glassconfig DEBUG_UART_SHIFT 86dd0b0122SSimon Glass int "UART register shift" 87dd0b0122SSimon Glass depends on DEBUG_UART 88dd0b0122SSimon Glass default 0 if DEBUG_UART 89dd0b0122SSimon Glass help 90dd0b0122SSimon Glass Some UARTs (notably ns16550) support different register layouts 91dd0b0122SSimon Glass where the registers are spaced either as bytes, words or some other 92dd0b0122SSimon Glass value. Use this value to specify the shift to use, where 0=byte 93dd0b0122SSimon Glass registers, 2=32-bit word registers, etc. 94dd0b0122SSimon Glass 95af282245SSimon Glassconfig SANDBOX_SERIAL 96af282245SSimon Glass bool "Sandbox UART support" 97af282245SSimon Glass depends on SANDBOX && DM 98af282245SSimon Glass help 99af282245SSimon Glass Select this to enable a seral UART for sandbox. This is required to 100af282245SSimon Glass operate correctly, otherwise you will see no serial output from 101af282245SSimon Glass sandbox. The emulated UART will display to the console and console 102af282245SSimon Glass input will be fed into the UART. This allows you to interact with 103af282245SSimon Glass U-Boot. 104af282245SSimon Glass 105af282245SSimon Glass The operation of the console is controlled by the -t command-line 106af282245SSimon Glass flag. In raw mode, U-Boot sees all characters from the terminal 107af282245SSimon Glass before they are processed, including Ctrl-C. In cooked mode, Ctrl-C 108af282245SSimon Glass is processed by the terminal, and terminates U-Boot. Valid options 109af282245SSimon Glass are: 110af282245SSimon Glass 111af282245SSimon Glass -t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot 112af282245SSimon Glass -t raw Raw mode, Ctrl-C is processed by U-Boot 113af282245SSimon Glass -t cooked Cooked mode, Ctrl-C terminates 114af282245SSimon Glass 115ff247b7aSMasahiro Yamadaconfig UNIPHIER_SERIAL 116b6ef3a3fSMasahiro Yamada bool "Support for UniPhier on-chip UART" 117ff247b7aSMasahiro Yamada depends on ARCH_UNIPHIER && DM_SERIAL 118ff247b7aSMasahiro Yamada help 119b6ef3a3fSMasahiro Yamada If you have a UniPhier based board and want to use the on-chip 120b6ef3a3fSMasahiro Yamada serial ports, say Y to this option. If unsure, say N. 121dcfe4a54SSimon Glass 122dcfe4a54SSimon Glassconfig X86_SERIAL 123dcfe4a54SSimon Glass bool "Support for 16550 serial port on x86 machines" 124dcfe4a54SSimon Glass depends on X86 125dcfe4a54SSimon Glass default y 126dcfe4a54SSimon Glass help 127dcfe4a54SSimon Glass Most x86 machines have a ns16550 UART or compatible. This can be 128dcfe4a54SSimon Glass enabled in the device tree with the correct input clock frequency 129dcfe4a54SSimon Glass provided (default 1843200). Enable this to obtain serial console 130dcfe4a54SSimon Glass output. 131