drivers/serial/Kconfig

   1 #
   2 # Serial device configuration
   3 #
   4
   5 menu "Serial drivers"
   6
   7 config BAUDRATE
   8         int "Default baudrate"
   9         default 115200
  10         help
  11           Select a default baudrate, where "default" has a driver-specific
  12           meaning of either setting the baudrate for the early debug UART
  13           in the SPL stage (most drivers) or for choosing a default baudrate
  14           in the absence of an environment setting (serial_mxc.c).
  15
  16 config REQUIRE_SERIAL_CONSOLE
  17         bool "Require a serial port for console"
  18         # Running without a serial console is not supported by the
  19         # non-dm serial code
  20         depends on DM_SERIAL
  21         default y
  22         help
  23           Require a serial port for the console, and panic if none is found
  24           during serial port initialization (default y). Set this to n on
  25           boards which have no debug serial port whatsoever.
  26
  27 config SERIAL_PRESENT
  28         bool "Provide a serial driver"
  29         depends on DM_SERIAL
  30         default y
  31         help
  32           In very space-constrained devices even the full UART driver is too
  33           large. In this case the debug UART can still be used in some cases.
  34           This option enables the full UART in U-Boot, so if is it disabled,
  35           the full UART driver will be omitted, thus saving space.
  36
  37 config SPL_SERIAL_PRESENT
  38         bool "Provide a serial driver in SPL"
  39         depends on DM_SERIAL
  40         default y
  41         help
  42           In very space-constrained devices even the full UART driver is too
  43           large. In this case the debug UART can still be used in some cases.
  44           This option enables the full UART in SPL, so if is it disabled,
  45           the full UART driver will be omitted, thus saving space.
  46
  47 config DM_SERIAL
  48         bool "Enable Driver Model for serial drivers"
  49         depends on DM
  50         help
  51           Enable driver model for serial. This replaces
  52           drivers/serial/serial.c with the serial uclass, which
  53           implements serial_putc() etc. The uclass interface is
  54           defined in include/serial.h.
  55
  56 config DEBUG_UART
  57         bool "Enable an early debug UART for debugging"
  58         help
  59           The debug UART is intended for use very early in U-Boot to debug
  60           problems when an ICE or other debug mechanism is not available.
  61
  62           To use it you should:
  63           - Make sure your UART supports this interface
  64           - Enable CONFIG_DEBUG_UART
  65           - Enable the CONFIG for your UART to tell it to provide this interface
  66                 (e.g. CONFIG_DEBUG_UART_NS16550)
  67           - Define the required settings as needed (see below)
  68           - Call debug_uart_init() before use
  69           - Call debug_uart_putc() to output a character
  70
  71           Depending on your platform it may be possible to use this UART before
  72           a stack is available.
  73
  74           If your UART does not support this interface you can probably add
  75           support quite easily. Remember that you cannot use driver model and
  76           it is preferred to use no stack.
  77
  78           You must not use this UART once driver model is working and the
  79           serial drivers are up and running (done in serial_init()). Otherwise
  80           the drivers may conflict and you will get strange output.
  81
  82 choice
  83         prompt "Select which UART will provide the debug UART"
  84         depends on DEBUG_UART
  85         default DEBUG_UART_NS16550
  86
  87 config DEBUG_UART_ALTERA_JTAGUART
  88         bool "Altera JTAG UART"
  89         help
  90           Select this to enable a debug UART using the altera_jtag_uart driver.
  91           You will need to provide parameters to make this work. The driver will
  92           be available until the real driver model serial is running.
  93
  94 config DEBUG_UART_ALTERA_UART
  95         bool "Altera UART"
  96         help
  97           Select this to enable a debug UART using the altera_uart driver.
  98           You will need to provide parameters to make this work. The driver will
  99           be available until the real driver model serial is running.
 100
 101 config DEBUG_UART_AR933X
 102         bool "QCA/Atheros ar933x"
 103         depends on AR933X_UART
 104         help
 105           Select this to enable a debug UART using the ar933x uart driver.
 106           You will need to provide parameters to make this work. The
 107           driver will be available until the real driver model serial is
 108           running.
 109
 110 config DEBUG_UART_ATMEL
 111         bool "Atmel USART"
 112         help
 113           Select this to enable a debug UART using the atmel usart driver. You
 114           will need to provide parameters to make this work. The driver will
 115           be available until the real driver-model serial is running.
 116
 117 config DEBUG_UART_NS16550
 118         bool "ns16550"
 119         help
 120           Select this to enable a debug UART using the ns16550 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_EFI_CONSOLE
 125         bool "EFI"
 126         depends on EFI_APP
 127         help
 128           Select this to enable a debug console which calls back to EFI to
 129           output to the console. This can be useful for early debugging of
 130           U-Boot when running on top of EFI (Extensive Firmware Interface).
 131           This is a type of BIOS used by PCs.
 132
 133 config DEBUG_UART_S5P
 134         bool "Samsung S5P"
 135         help
 136           Select this to enable a debug UART using the serial_s5p driver. You
 137           will need to provide parameters to make this work. The driver will
 138           be available until the real driver-model serial is running.
 139
 140 config DEBUG_UART_MESON
 141         bool "Amlogic Meson"
 142         depends on MESON_SERIAL
 143         help
 144           Select this to enable a debug UART using the serial_meson driver. You
 145           will need to provide parameters to make this work. The driver will
 146           be available until the real driver-model serial is running.
 147
 148 config DEBUG_UART_UARTLITE
 149         bool "Xilinx Uartlite"
 150         help
 151           Select this to enable a debug UART using the serial_uartlite driver.
 152           You will need to provide parameters to make this work. The driver will
 153           be available until the real driver-model serial is running.
 154
 155 config DEBUG_UART_ARM_DCC
 156         bool "ARM DCC"
 157         help
 158           Select this to enable a debug UART using the ARM JTAG DCC port.
 159           The DCC port can be used for very early debugging and doesn't require
 160           any additional setting like address/baudrate/clock. On systems without
 161           any serial interface this is the easiest way how to get console.
 162           Every ARM core has own DCC port which is the part of debug interface.
 163           This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
 164           architectures.
 165
 166 config DEBUG_MVEBU_A3700_UART
 167         bool "Marvell Armada 3700"
 168         help
 169           Select this to enable a debug UART using the serial_mvebu driver. You
 170           will need to provide parameters to make this work. The driver will
 171           be available until the real driver-model serial is running.
 172
 173 config DEBUG_UART_ZYNQ
 174         bool "Xilinx Zynq"
 175         help
 176           Select this to enable a debug UART using the serial_zynq driver. You
 177           will need to provide parameters to make this work. The driver will
 178           be available until the real driver-model serial is running.
 179
 180 config DEBUG_UART_APBUART
 181         depends on LEON3
 182         bool "Gaisler APBUART"
 183         help
 184           Select this to enable a debug UART using the serial_leon3 driver. You
 185           will need to provide parameters to make this work. The driver will
 186           be available until the real driver model serial is running.
 187
 188 config DEBUG_UART_PL010
 189         bool "pl010"
 190         help
 191           Select this to enable a debug UART using the pl01x driver with the
 192           PL010 UART type. You will need to provide parameters to make this
 193           work. The driver will be available until the real driver model
 194           serial is running.
 195
 196 config DEBUG_UART_PL011
 197         bool "pl011"
 198         help
 199           Select this to enable a debug UART using the pl01x driver with the
 200           PL011 UART type. You will need to provide parameters to make this
 201           work. The driver will be available until the real driver model
 202           serial is running.
 203
 204 config DEBUG_UART_PIC32
 205         bool "Microchip PIC32"
 206         depends on PIC32_SERIAL
 207         help
 208           Select this to enable a debug UART using the serial_pic32 driver. You
 209           will need to provide parameters to make this work. The driver will
 210           be available until the real driver model serial is running.
 211
 212 config DEBUG_UART_UNIPHIER
 213         bool "UniPhier on-chip UART"
 214         depends on ARCH_UNIPHIER
 215         help
 216           Select this to enable a debug UART using the UniPhier on-chip UART.
 217           You will need to provide DEBUG_UART_BASE to make this work.  The
 218           driver will be available until the real driver-model serial is
 219           running.
 220
 221 endchoice
 222
 223 config DEBUG_UART_BASE
 224         hex "Base address of UART"
 225         depends on DEBUG_UART
 226         help
 227           This is the base address of your UART for memory-mapped UARTs.
 228
 229           A default should be provided by your board, but if not you will need
 230           to use the correct value here.
 231
 232 config DEBUG_UART_CLOCK
 233         int "UART input clock"
 234         depends on DEBUG_UART
 235         help
 236           The UART input clock determines the speed of the internal UART
 237           circuitry. The baud rate is derived from this by dividing the input
 238           clock down.
 239
 240           A default should be provided by your board, but if not you will need
 241           to use the correct value here.
 242
 243 config DEBUG_UART_SHIFT
 244         int "UART register shift"
 245         depends on DEBUG_UART
 246         default 0 if DEBUG_UART
 247         help
 248           Some UARTs (notably ns16550) support different register layouts
 249           where the registers are spaced either as bytes, words or some other
 250           value. Use this value to specify the shift to use, where 0=byte
 251           registers, 2=32-bit word registers, etc.
 252
 253 config DEBUG_UART_BOARD_INIT
 254         bool "Enable board-specific debug UART init"
 255         depends on DEBUG_UART
 256         help
 257           Some boards need to set things up before the debug UART can be used.
 258           On these boards a call to debug_uart_init() is insufficient. When
 259           this option is enabled, the function board_debug_uart_init() will
 260           be called when debug_uart_init() is called. You can put any code
 261           here that is needed to set up the UART ready for use, such as set
 262           pin multiplexing or enable clocks.
 263
 264 config DEBUG_UART_ANNOUNCE
 265         bool "Show a message when the debug UART starts up"
 266         depends on DEBUG_UART
 267         help
 268           Enable this option to show a message when the debug UART is ready
 269           for use. You will see a message like "<debug_uart> " as soon as
 270           U-Boot has the UART ready for use (i.e. your code calls
 271           debug_uart_init()). This can be useful just as a check that
 272           everything is working.
 273
 274 config DEBUG_UART_SKIP_INIT
 275         bool "Skip UART initialization"
 276         help
 277           Select this if the UART you want to use for debug output is already
 278           initialized by the time U-Boot starts its execution.
 279
 280 config ALTERA_JTAG_UART
 281         bool "Altera JTAG UART support"
 282         depends on DM_SERIAL
 283         help
 284           Select this to enable an JTAG UART for Altera devices.The JTAG UART
 285           core implements a method to communicate serial character streams
 286           between a host PC and a Qsys system on an Altera FPGA. Please find
 287           details on the "Embedded Peripherals IP User Guide" of Altera.
 288
 289 config ALTERA_JTAG_UART_BYPASS
 290         bool "Bypass output when no connection"
 291         depends on ALTERA_JTAG_UART
 292         help
 293           Bypass console output and keep going even if there is no JTAG
 294           terminal connection with the host. The console output will resume
 295           once the JTAG terminal is connected. Without the bypass, the console
 296           output will wait forever until a JTAG terminal is connected. If you
 297           not are sure, say Y.
 298
 299 config ALTERA_UART
 300         bool "Altera UART support"
 301         depends on DM_SERIAL
 302         help
 303           Select this to enable an UART for Altera devices. Please find
 304           details on the "Embedded Peripherals IP User Guide" of Altera.
 305
 306 config AR933X_UART
 307         bool "QCA/Atheros ar933x UART support"
 308         depends on DM_SERIAL && SOC_AR933X
 309         help
 310           Select this to enable UART support for QCA/Atheros ar933x
 311           devices. This driver uses driver model and requires a device
 312           tree binding to operate, please refer to the document at
 313           doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
 314
 315 config ATMEL_USART
 316         bool "Atmel USART support"
 317         help
 318           Select this to enable USART support for Atmel SoCs. It can be
 319           configured in the device tree, and input clock frequency can
 320           be got from the clk node.
 321
 322 config FSL_LPUART
 323         bool "Freescale LPUART support"
 324         help
 325           Select this to enable a Low Power UART for Freescale VF610 and
 326           QorIQ Layerscape devices.
 327
 328 config MVEBU_A3700_UART
 329         bool "UART support for Armada 3700"
 330         default n
 331         help
 332           Choose this option to add support for UART driver on the Marvell
 333           Armada 3700 SoC. The base address is configured via DT.
 334
 335 config MXC_UART
 336         bool "IMX serial port support"
 337         depends on MX5 || MX6
 338         help
 339           If you have a machine based on a Motorola IMX CPU you
 340           can enable its onboard serial port by enabling this option.
 341
 342 config PIC32_SERIAL
 343         bool "Support for Microchip PIC32 on-chip UART"
 344         depends on DM_SERIAL && MACH_PIC32
 345         default y
 346         help
 347           Support for the UART found on Microchip PIC32 SoC's.
 348
 349 config SYS_NS16550
 350         bool "NS16550 UART or compatible"
 351         help
 352           Support NS16550 UART or compatible. This can be enabled in the
 353           device tree with the correct input clock frequency. If the input
 354           clock frequency is not defined in the device tree, the macro
 355           CONFIG_SYS_NS16550_CLK defined in a legacy board header file will
 356           be used. It can be a constant or a function to get clock, eg,
 357           get_serial_clock().
 358
 359 config ROCKCHIP_SERIAL
 360         bool "Rockchip on-chip UART support"
 361         depends on DM_SERIAL && SPL_OF_PLATDATA
 362         help
 363           Select this to enable a debug UART for Rockchip devices when using
 364           CONFIG_SPL_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
 365           This uses the ns16550 driver, converting the platdata from of-platdata
 366           to the ns16550 format.
 367
 368 config SANDBOX_SERIAL
 369         bool "Sandbox UART support"
 370         depends on SANDBOX
 371         help
 372           Select this to enable a seral UART for sandbox. This is required to
 373           operate correctly, otherwise you will see no serial output from
 374           sandbox. The emulated UART will display to the console and console
 375           input will be fed into the UART. This allows you to interact with
 376           U-Boot.
 377
 378           The operation of the console is controlled by the -t command-line
 379           flag. In raw mode, U-Boot sees all characters from the terminal
 380           before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
 381           is processed by the terminal, and terminates U-Boot. Valid options
 382           are:
 383
 384              -t raw-with-sigs   Raw mode, Ctrl-C will terminate U-Boot
 385              -t raw             Raw mode, Ctrl-C is processed by U-Boot
 386              -t cooked          Cooked mode, Ctrl-C terminates
 387
 388 config UNIPHIER_SERIAL
 389         bool "Support for UniPhier on-chip UART"
 390         depends on ARCH_UNIPHIER
 391         default y
 392         help
 393           If you have a UniPhier based board and want to use the on-chip
 394           serial ports, say Y to this option. If unsure, say N.
 395
 396 config XILINX_UARTLITE
 397         bool "Xilinx Uarlite support"
 398         depends on DM_SERIAL && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx)
 399         help
 400           If you have a Xilinx based board and want to use the uartlite
 401           serial ports, say Y to this option. If unsure, say N.
 402
 403 config MESON_SERIAL
 404         bool "Support for Amlogic Meson UART"
 405         depends on DM_SERIAL && ARCH_MESON
 406         help
 407           If you have an Amlogic Meson based board and want to use the on-chip
 408           serial ports, say Y to this option. If unsure, say N.
 409
 410 config MSM_SERIAL
 411         bool "Qualcomm on-chip UART"
 412         depends on DM_SERIAL
 413         help
 414           Support Data Mover UART used on Qualcomm Snapdragon SoCs.
 415           It should support all Qualcomm devices with UARTDM version 1.4,
 416           for example APQ8016 and MSM8916.
 417           Single baudrate is supported in current implementation (115200).
 418
 419 config PXA_SERIAL
 420         bool "PXA serial port support"
 421         help
 422           If you have a machine based on a Marvell XScale PXA2xx CPU you
 423           can enable its onboard serial ports by enabling this option.
 424
 425 config STI_ASC_SERIAL
 426         bool "STMicroelectronics on-chip UART"
 427         depends on DM_SERIAL && ARCH_STI
 428         help
 429           Select this to enable Asynchronous Serial Controller available
 430           on STiH410 SoC. This is a basic implementation,  it supports
 431           following baudrate 9600, 19200, 38400, 57600 and 115200.
 432
 433 endmenu