1# 2# Serial device configuration 3# 4 5menu "Serial drivers" 6 7config REQUIRE_SERIAL_CONSOLE 8 bool "Require a serial port for console" 9 # Running without a serial console is not supported by the 10 # non-dm serial code 11 depends on DM_SERIAL 12 default y 13 help 14 Require a serial port for the console, and panic if none is found 15 during serial port initialization (default y). Set this to n on 16 boards which have no debug serial port whatsoever. 17 18config DM_SERIAL 19 bool "Enable Driver Model for serial drivers" 20 depends on DM 21 help 22 Enable driver model for serial. This replaces 23 drivers/serial/serial.c with the serial uclass, which 24 implements serial_putc() etc. The uclass interface is 25 defined in include/serial.h. 26 27config DEBUG_UART 28 bool "Enable an early debug UART for debugging" 29 help 30 The debug UART is intended for use very early in U-Boot to debug 31 problems when an ICE or other debug mechanism is not available. 32 33 To use it you should: 34 - Make sure your UART supports this interface 35 - Enable CONFIG_DEBUG_UART 36 - Enable the CONFIG for your UART to tell it to provide this interface 37 (e.g. CONFIG_DEBUG_UART_NS16550) 38 - Define the required settings as needed (see below) 39 - Call debug_uart_init() before use 40 - Call debug_uart_putc() to output a character 41 42 Depending on your platform it may be possible to use this UART before 43 a stack is available. 44 45 If your UART does not support this interface you can probably add 46 support quite easily. Remember that you cannot use driver model and 47 it is preferred to use no stack. 48 49 You must not use this UART once driver model is working and the 50 serial drivers are up and running (done in serial_init()). Otherwise 51 the drivers may conflict and you will get strange output. 52 53choice 54 prompt "Select which UART will provide the debug UART" 55 depends on DEBUG_UART 56 57config DEBUG_UART_ALTERA_JTAGUART 58 bool "Altera JTAG UART" 59 help 60 Select this to enable a debug UART using the altera_jtag_uart driver. 61 You will need to provide parameters to make this work. The driver will 62 be available until the real driver model serial is running. 63 64config DEBUG_UART_ALTERA_UART 65 bool "Altera UART" 66 help 67 Select this to enable a debug UART using the altera_uart driver. 68 You will need to provide parameters to make this work. The driver will 69 be available until the real driver model serial is running. 70 71config DEBUG_UART_NS16550 72 bool "ns16550" 73 help 74 Select this to enable a debug UART using the ns16550 driver. You 75 will need to provide parameters to make this work. The driver will 76 be available until the real driver model serial is running. 77 78config DEBUG_EFI_CONSOLE 79 bool "EFI" 80 depends on EFI_APP 81 help 82 Select this to enable a debug console which calls back to EFI to 83 output to the console. This can be useful for early debugging of 84 U-Boot when running on top of EFI (Extensive Firmware Interface). 85 This is a type of BIOS used by PCs. 86 87config DEBUG_UART_S5P 88 bool "Samsung S5P" 89 help 90 Select this to enable a debug UART using the serial_s5p driver. You 91 will need to provide parameters to make this work. The driver will 92 be available until the real driver-model serial is running. 93 94config DEBUG_UART_ZYNQ 95 bool "Xilinx Zynq" 96 help 97 Select this to enable a debug UART using the serial_s5p driver. You 98 will need to provide parameters to make this work. The driver will 99 be available until the real driver-model serial is running. 100 101config DEBUG_UART_APBUART 102 depends on LEON3 103 bool "Gaisler APBUART" 104 help 105 Select this to enable a debug UART using the serial_leon3 driver. You 106 will need to provide parameters to make this work. The driver will 107 be available until the real driver model serial is running. 108 109endchoice 110 111config DEBUG_UART_BASE 112 hex "Base address of UART" 113 depends on DEBUG_UART 114 help 115 This is the base address of your UART for memory-mapped UARTs. 116 117 A default should be provided by your board, but if not you will need 118 to use the correct value here. 119 120config DEBUG_UART_CLOCK 121 int "UART input clock" 122 depends on DEBUG_UART 123 help 124 The UART input clock determines the speed of the internal UART 125 circuitry. The baud rate is derived from this by dividing the input 126 clock down. 127 128 A default should be provided by your board, but if not you will need 129 to use the correct value here. 130 131config DEBUG_UART_SHIFT 132 int "UART register shift" 133 depends on DEBUG_UART 134 default 0 if DEBUG_UART 135 help 136 Some UARTs (notably ns16550) support different register layouts 137 where the registers are spaced either as bytes, words or some other 138 value. Use this value to specify the shift to use, where 0=byte 139 registers, 2=32-bit word registers, etc. 140 141config DEBUG_UART_BOARD_INIT 142 bool "Enable board-specific debug UART init" 143 depends on DEBUG_UART 144 help 145 Some boards need to set things up before the debug UART can be used. 146 On these boards a call to debug_uart_init() is insufficient. When 147 this option is enabled, the function board_debug_uart_init() will 148 be called when debug_uart_init() is called. You can put any code 149 here that is needed to set up the UART ready for use, such as set 150 pin multiplexing or enable clocks. 151 152config DEBUG_UART_ANNOUNCE 153 bool "Show a message when the debug UART starts up" 154 depends on DEBUG_UART 155 help 156 Enable this option to show a message when the debug UART is ready 157 for use. You will see a message like "<debug_uart> " as soon as 158 U-Boot has the UART ready for use (i.e. your code calls 159 debug_uart_init()). This can be useful just as a check that 160 everything is working. 161 162config ALTERA_JTAG_UART 163 bool "Altera JTAG UART support" 164 depends on DM_SERIAL 165 help 166 Select this to enable an JTAG UART for Altera devices.The JTAG UART 167 core implements a method to communicate serial character streams 168 between a host PC and a Qsys system on an Altera FPGA. Please find 169 details on the "Embedded Peripherals IP User Guide" of Altera. 170 171config ALTERA_JTAG_UART_BYPASS 172 bool "Bypass output when no connection" 173 depends on ALTERA_JTAG_UART 174 help 175 Bypass console output and keep going even if there is no JTAG 176 terminal connection with the host. The console output will resume 177 once the JTAG terminal is connected. Without the bypass, the console 178 output will wait forever until a JTAG terminal is connected. If you 179 not are sure, say Y. 180 181config ALTERA_UART 182 bool "Altera UART support" 183 depends on DM_SERIAL 184 help 185 Select this to enable an UART for Altera devices. Please find 186 details on the "Embedded Peripherals IP User Guide" of Altera. 187 188config ROCKCHIP_SERIAL 189 bool "Rockchip on-chip UART support" 190 depends on ARCH_ROCKCHIP && DM_SERIAL 191 help 192 Select this to enable a debug UART for Rockchip devices. This uses 193 the ns16550 driver. You will need to #define CONFIG_SYS_NS16550 in 194 your board config header. The clock input is automatically set to 195 use the oscillator (24MHz). 196 197config SANDBOX_SERIAL 198 bool "Sandbox UART support" 199 depends on SANDBOX 200 help 201 Select this to enable a seral UART for sandbox. This is required to 202 operate correctly, otherwise you will see no serial output from 203 sandbox. The emulated UART will display to the console and console 204 input will be fed into the UART. This allows you to interact with 205 U-Boot. 206 207 The operation of the console is controlled by the -t command-line 208 flag. In raw mode, U-Boot sees all characters from the terminal 209 before they are processed, including Ctrl-C. In cooked mode, Ctrl-C 210 is processed by the terminal, and terminates U-Boot. Valid options 211 are: 212 213 -t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot 214 -t raw Raw mode, Ctrl-C is processed by U-Boot 215 -t cooked Cooked mode, Ctrl-C terminates 216 217config UNIPHIER_SERIAL 218 bool "Support for UniPhier on-chip UART" 219 depends on ARCH_UNIPHIER 220 help 221 If you have a UniPhier based board and want to use the on-chip 222 serial ports, say Y to this option. If unsure, say N. 223 224config X86_SERIAL 225 bool "Support for 16550 serial port on x86 machines" 226 depends on X86 227 default y 228 help 229 Most x86 machines have a ns16550 UART or compatible. This can be 230 enabled in the device tree with the correct input clock frequency 231 provided (default 1843200). Enable this to obtain serial console 232 output. 233 234endmenu 235