drivers/serial/Kconfig

   1 #
   2 # Serial device configuration
   3 #
   4
   5 menu "Serial drivers"
   6
   7 config 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
  18 config SERIAL_PRESENT
  19         bool "Provide a serial driver"
  20         depends on DM_SERIAL
  21         default y
  22         help
  23           In very space-constrained devices even the full UART driver is too
  24           large. In this case the debug UART can still be used in some cases.
  25           This option enables the full UART in U-Boot, so if is it disabled,
  26           the full UART driver will be omitted, thus saving space.
  27
  28 config SPL_SERIAL_PRESENT
  29         bool "Provide a serial driver in SPL"
  30         depends on DM_SERIAL
  31         default y
  32         help
  33           In very space-constrained devices even the full UART driver is too
  34           large. In this case the debug UART can still be used in some cases.
  35           This option enables the full UART in SPL, so if is it disabled,
  36           the full UART driver will be omitted, thus saving space.
  37
  38 config DM_SERIAL
  39         bool "Enable Driver Model for serial drivers"
  40         depends on DM
  41         help
  42           Enable driver model for serial. This replaces
  43           drivers/serial/serial.c with the serial uclass, which
  44           implements serial_putc() etc. The uclass interface is
  45           defined in include/serial.h.
  46
  47 config DEBUG_UART
  48         bool "Enable an early debug UART for debugging"
  49         help
  50           The debug UART is intended for use very early in U-Boot to debug
  51           problems when an ICE or other debug mechanism is not available.
  52
  53           To use it you should:
  54           - Make sure your UART supports this interface
  55           - Enable CONFIG_DEBUG_UART
  56           - Enable the CONFIG for your UART to tell it to provide this interface
  57                 (e.g. CONFIG_DEBUG_UART_NS16550)
  58           - Define the required settings as needed (see below)
  59           - Call debug_uart_init() before use
  60           - Call debug_uart_putc() to output a character
  61
  62           Depending on your platform it may be possible to use this UART before
  63           a stack is available.
  64
  65           If your UART does not support this interface you can probably add
  66           support quite easily. Remember that you cannot use driver model and
  67           it is preferred to use no stack.
  68
  69           You must not use this UART once driver model is working and the
  70           serial drivers are up and running (done in serial_init()). Otherwise
  71           the drivers may conflict and you will get strange output.
  72
  73 choice
  74         prompt "Select which UART will provide the debug UART"
  75         depends on DEBUG_UART
  76         default DEBUG_UART_NS16550
  77
  78 config DEBUG_UART_ALTERA_JTAGUART
  79         bool "Altera JTAG UART"
  80         help
  81           Select this to enable a debug UART using the altera_jtag_uart driver.
  82           You will need to provide parameters to make this work. The driver will
  83           be available until the real driver model serial is running.
  84
  85 config DEBUG_UART_ALTERA_UART
  86         bool "Altera UART"
  87         help
  88           Select this to enable a debug UART using the altera_uart driver.
  89           You will need to provide parameters to make this work. The driver will
  90           be available until the real driver model serial is running.
  91
  92 config DEBUG_UART_AR933X
  93         bool "QCA/Atheros ar933x"
  94         depends on AR933X_UART
  95         help
  96           Select this to enable a debug UART using the ar933x uart driver.
  97           You will need to provide parameters to make this work. The
  98           driver will be available until the real driver model serial is
  99           running.
 100
 101 config DEBUG_UART_NS16550
 102         bool "ns16550"
 103         help
 104           Select this to enable a debug UART using the ns16550 driver. You
 105           will need to provide parameters to make this work. The driver will
 106           be available until the real driver model serial is running.
 107
 108 config DEBUG_EFI_CONSOLE
 109         bool "EFI"
 110         depends on EFI_APP
 111         help
 112           Select this to enable a debug console which calls back to EFI to
 113           output to the console. This can be useful for early debugging of
 114           U-Boot when running on top of EFI (Extensive Firmware Interface).
 115           This is a type of BIOS used by PCs.
 116
 117 config DEBUG_UART_S5P
 118         bool "Samsung S5P"
 119         help
 120           Select this to enable a debug UART using the serial_s5p driver. You
 121           will need to provide parameters to make this work. The driver will
 122           be available until the real driver-model serial is running.
 123
 124 config DEBUG_UART_MESON
 125         bool "Amlogic Meson"
 126         depends on MESON_SERIAL
 127         help
 128           Select this to enable a debug UART using the serial_meson driver. You
 129           will need to provide parameters to make this work. The driver will
 130           be available until the real driver-model serial is running.
 131
 132 config DEBUG_UART_UARTLITE
 133         bool "Xilinx Uartlite"
 134         help
 135           Select this to enable a debug UART using the serial_uartlite driver.
 136           You will need to provide parameters to make this work. The driver will
 137           be available until the real driver-model serial is running.
 138
 139 config DEBUG_UART_ARM_DCC
 140         bool "ARM DCC"
 141         help
 142           Select this to enable a debug UART using the ARM JTAG DCC port.
 143           The DCC port can be used for very early debugging and doesn't require
 144           any additional setting like address/baudrate/clock. On systems without
 145           any serial interface this is the easiest way how to get console.
 146           Every ARM core has own DCC port which is the part of debug interface.
 147           This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
 148           architectures.
 149
 150 config DEBUG_MVEBU_A3700_UART
 151         bool "Marvell Armada 3700"
 152         help
 153           Select this to enable a debug UART using the serial_mvebu driver. You
 154           will need to provide parameters to make this work. The driver will
 155           be available until the real driver-model serial is running.
 156
 157 config DEBUG_UART_ZYNQ
 158         bool "Xilinx Zynq"
 159         help
 160           Select this to enable a debug UART using the serial_zynq driver. You
 161           will need to provide parameters to make this work. The driver will
 162           be available until the real driver-model serial is running.
 163
 164 config DEBUG_UART_APBUART
 165         depends on LEON3
 166         bool "Gaisler APBUART"
 167         help
 168           Select this to enable a debug UART using the serial_leon3 driver. You
 169           will need to provide parameters to make this work. The driver will
 170           be available until the real driver model serial is running.
 171
 172 config DEBUG_UART_PL010
 173         bool "pl010"
 174         help
 175           Select this to enable a debug UART using the pl01x driver with the
 176           PL010 UART type. You will need to provide parameters to make this
 177           work. The driver will be available until the real driver model
 178           serial is running.
 179
 180 config DEBUG_UART_PL011
 181         bool "pl011"
 182         help
 183           Select this to enable a debug UART using the pl01x driver with the
 184           PL011 UART type. You will need to provide parameters to make this
 185           work. The driver will be available until the real driver model
 186           serial is running.
 187
 188 config DEBUG_UART_PIC32
 189         bool "Microchip PIC32"
 190         depends on PIC32_SERIAL
 191         help
 192           Select this to enable a debug UART using the serial_pic32 driver. You
 193           will need to provide parameters to make this work. The driver will
 194           be available until the real driver model serial is running.
 195
 196 config DEBUG_UART_UNIPHIER
 197         bool "UniPhier on-chip UART"
 198         depends on ARCH_UNIPHIER
 199         help
 200           Select this to enable a debug UART using the UniPhier on-chip UART.
 201           You will need to provide DEBUG_UART_BASE to make this work.  The
 202           driver will be available until the real driver-model serial is
 203           running.
 204
 205 endchoice
 206
 207 config DEBUG_UART_BASE
 208         hex "Base address of UART"
 209         depends on DEBUG_UART
 210         help
 211           This is the base address of your UART for memory-mapped UARTs.
 212
 213           A default should be provided by your board, but if not you will need
 214           to use the correct value here.
 215
 216 config DEBUG_UART_CLOCK
 217         int "UART input clock"
 218         depends on DEBUG_UART
 219         help
 220           The UART input clock determines the speed of the internal UART
 221           circuitry. The baud rate is derived from this by dividing the input
 222           clock down.
 223
 224           A default should be provided by your board, but if not you will need
 225           to use the correct value here.
 226
 227 config DEBUG_UART_SHIFT
 228         int "UART register shift"
 229         depends on DEBUG_UART
 230         default 0 if DEBUG_UART
 231         help
 232           Some UARTs (notably ns16550) support different register layouts
 233           where the registers are spaced either as bytes, words or some other
 234           value. Use this value to specify the shift to use, where 0=byte
 235           registers, 2=32-bit word registers, etc.
 236
 237 config DEBUG_UART_BOARD_INIT
 238         bool "Enable board-specific debug UART init"
 239         depends on DEBUG_UART
 240         help
 241           Some boards need to set things up before the debug UART can be used.
 242           On these boards a call to debug_uart_init() is insufficient. When
 243           this option is enabled, the function board_debug_uart_init() will
 244           be called when debug_uart_init() is called. You can put any code
 245           here that is needed to set up the UART ready for use, such as set
 246           pin multiplexing or enable clocks.
 247
 248 config DEBUG_UART_ANNOUNCE
 249         bool "Show a message when the debug UART starts up"
 250         depends on DEBUG_UART
 251         help
 252           Enable this option to show a message when the debug UART is ready
 253           for use. You will see a message like "<debug_uart> " as soon as
 254           U-Boot has the UART ready for use (i.e. your code calls
 255           debug_uart_init()). This can be useful just as a check that
 256           everything is working.
 257
 258 config DEBUG_UART_SKIP_INIT
 259         bool "Skip UART initialization"
 260         help
 261           Select this if the UART you want to use for debug output is already
 262           initialized by the time U-Boot starts its execution.
 263
 264 config ALTERA_JTAG_UART
 265         bool "Altera JTAG UART support"
 266         depends on DM_SERIAL
 267         help
 268           Select this to enable an JTAG UART for Altera devices.The JTAG UART
 269           core implements a method to communicate serial character streams
 270           between a host PC and a Qsys system on an Altera FPGA. Please find
 271           details on the "Embedded Peripherals IP User Guide" of Altera.
 272
 273 config ALTERA_JTAG_UART_BYPASS
 274         bool "Bypass output when no connection"
 275         depends on ALTERA_JTAG_UART
 276         help
 277           Bypass console output and keep going even if there is no JTAG
 278           terminal connection with the host. The console output will resume
 279           once the JTAG terminal is connected. Without the bypass, the console
 280           output will wait forever until a JTAG terminal is connected. If you
 281           not are sure, say Y.
 282
 283 config ALTERA_UART
 284         bool "Altera UART support"
 285         depends on DM_SERIAL
 286         help
 287           Select this to enable an UART for Altera devices. Please find
 288           details on the "Embedded Peripherals IP User Guide" of Altera.
 289
 290 config AR933X_UART
 291         bool "QCA/Atheros ar933x UART support"
 292         depends on DM_SERIAL && SOC_AR933X
 293         help
 294           Select this to enable UART support for QCA/Atheros ar933x
 295           devices. This driver uses driver model and requires a device
 296           tree binding to operate, please refer to the document at
 297           doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
 298
 299 config FSL_LPUART
 300         bool "Freescale LPUART support"
 301         help
 302           Select this to enable a Low Power UART for Freescale VF610 and
 303           QorIQ Layerscape devices.
 304
 305 config MVEBU_A3700_UART
 306         bool "UART support for Armada 3700"
 307         default n
 308         help
 309           Choose this option to add support for UART driver on the Marvell
 310           Armada 3700 SoC. The base address is configured via DT.
 311
 312 config PIC32_SERIAL
 313         bool "Support for Microchip PIC32 on-chip UART"
 314         depends on DM_SERIAL && MACH_PIC32
 315         default y
 316         help
 317           Support for the UART found on Microchip PIC32 SoC's.
 318
 319 config SYS_NS16550
 320         bool "NS16550 UART or compatible"
 321         help
 322           Support NS16550 UART or compatible. This can be enabled in the
 323           device tree with the correct input clock frequency. If the input
 324           clock frequency is not defined in the device tree, the macro
 325           CONFIG_SYS_NS16550_CLK defined in a legacy board header file will
 326           be used. It can be a constant or a function to get clock, eg,
 327           get_serial_clock().
 328
 329 config ROCKCHIP_SERIAL
 330         bool "Rockchip on-chip UART support"
 331         depends on DM_SERIAL && SPL_OF_PLATDATA
 332         help
 333           Select this to enable a debug UART for Rockchip devices when using
 334           CONFIG_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
 335           This uses the ns16550 driver, converting the platdata from of-platdata
 336           to the ns16550 format.
 337
 338 config SANDBOX_SERIAL
 339         bool "Sandbox UART support"
 340         depends on SANDBOX
 341         help
 342           Select this to enable a seral UART for sandbox. This is required to
 343           operate correctly, otherwise you will see no serial output from
 344           sandbox. The emulated UART will display to the console and console
 345           input will be fed into the UART. This allows you to interact with
 346           U-Boot.
 347
 348           The operation of the console is controlled by the -t command-line
 349           flag. In raw mode, U-Boot sees all characters from the terminal
 350           before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
 351           is processed by the terminal, and terminates U-Boot. Valid options
 352           are:
 353
 354              -t raw-with-sigs   Raw mode, Ctrl-C will terminate U-Boot
 355              -t raw             Raw mode, Ctrl-C is processed by U-Boot
 356              -t cooked          Cooked mode, Ctrl-C terminates
 357
 358 config UNIPHIER_SERIAL
 359         bool "Support for UniPhier on-chip UART"
 360         depends on ARCH_UNIPHIER
 361         default y
 362         help
 363           If you have a UniPhier based board and want to use the on-chip
 364           serial ports, say Y to this option. If unsure, say N.
 365
 366 config XILINX_UARTLITE
 367         bool "Xilinx Uarlite support"
 368         depends on DM_SERIAL && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx)
 369         help
 370           If you have a Xilinx based board and want to use the uartlite
 371           serial ports, say Y to this option. If unsure, say N.
 372
 373 config MESON_SERIAL
 374         bool "Support for Amlogic Meson UART"
 375         depends on DM_SERIAL && ARCH_MESON
 376         help
 377           If you have an Amlogic Meson based board and want to use the on-chip
 378           serial ports, say Y to this option. If unsure, say N.
 379
 380 config MSM_SERIAL
 381         bool "Qualcomm on-chip UART"
 382         depends on DM_SERIAL
 383         help
 384           Support Data Mover UART used on Qualcomm Snapdragon SoCs.
 385           It should support all Qualcomm devices with UARTDM version 1.4,
 386           for example APQ8016 and MSM8916.
 387           Single baudrate is supported in current implementation (115200).
 388
 389 endmenu