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 SPL_DM_SERIAL
  57         bool "Enable Driver Model for serial drivers"
  58         depends on DM_SERIAL
  59         default y if SPL && DM_SERIAL
  60         help
  61           Enable driver model for serial in SPL. This replaces
  62           drivers/serial/serial.c with the serial uclass, which
  63           implements serial_putc() etc. The uclass interface is
  64           defined in include/serial.h.
  65
  66 config TPL_DM_SERIAL
  67         bool "Enable Driver Model for serial drivers"
  68         depends on DM_SERIAL
  69         default y if TPL && DM_SERIAL
  70         help
  71           Enable driver model for serial in TPL. This replaces
  72           drivers/serial/serial.c with the serial uclass, which
  73           implements serial_putc() etc. The uclass interface is
  74           defined in include/serial.h.
  75
  76 config DEBUG_UART
  77         bool "Enable an early debug UART for debugging"
  78         help
  79           The debug UART is intended for use very early in U-Boot to debug
  80           problems when an ICE or other debug mechanism is not available.
  81
  82           To use it you should:
  83           - Make sure your UART supports this interface
  84           - Enable CONFIG_DEBUG_UART
  85           - Enable the CONFIG for your UART to tell it to provide this interface
  86                 (e.g. CONFIG_DEBUG_UART_NS16550)
  87           - Define the required settings as needed (see below)
  88           - Call debug_uart_init() before use
  89           - Call debug_uart_putc() to output a character
  90
  91           Depending on your platform it may be possible to use this UART before
  92           a stack is available.
  93
  94           If your UART does not support this interface you can probably add
  95           support quite easily. Remember that you cannot use driver model and
  96           it is preferred to use no stack.
  97
  98           You must not use this UART once driver model is working and the
  99           serial drivers are up and running (done in serial_init()). Otherwise
 100           the drivers may conflict and you will get strange output.
 101
 102 choice
 103         prompt "Select which UART will provide the debug UART"
 104         depends on DEBUG_UART
 105         default DEBUG_UART_NS16550
 106
 107 config DEBUG_UART_ALTERA_JTAGUART
 108         bool "Altera JTAG UART"
 109         help
 110           Select this to enable a debug UART using the altera_jtag_uart driver.
 111           You will need to provide parameters to make this work. The driver will
 112           be available until the real driver model serial is running.
 113
 114 config DEBUG_UART_ALTERA_UART
 115         bool "Altera UART"
 116         help
 117           Select this to enable a debug UART using the altera_uart driver.
 118           You will need to provide parameters to make this work. The driver will
 119           be available until the real driver model serial is running.
 120
 121 config DEBUG_UART_AR933X
 122         bool "QCA/Atheros ar933x"
 123         depends on AR933X_UART
 124         help
 125           Select this to enable a debug UART using the ar933x uart driver.
 126           You will need to provide parameters to make this work. The
 127           driver will be available until the real driver model serial is
 128           running.
 129
 130 config DEBUG_UART_ATMEL
 131         bool "Atmel USART"
 132         help
 133           Select this to enable a debug UART using the atmel usart driver. You
 134           will need to provide parameters to make this work. The driver will
 135           be available until the real driver-model serial is running.
 136
 137 config DEBUG_UART_NS16550
 138         bool "ns16550"
 139         help
 140           Select this to enable a debug UART using the ns16550 driver. You
 141           will need to provide parameters to make this work. The driver will
 142           be available until the real driver model serial is running.
 143
 144 config DEBUG_EFI_CONSOLE
 145         bool "EFI"
 146         depends on EFI_APP
 147         help
 148           Select this to enable a debug console which calls back to EFI to
 149           output to the console. This can be useful for early debugging of
 150           U-Boot when running on top of EFI (Extensive Firmware Interface).
 151           This is a type of BIOS used by PCs.
 152
 153 config DEBUG_UART_S5P
 154         bool "Samsung S5P"
 155         help
 156           Select this to enable a debug UART using the serial_s5p driver. You
 157           will need to provide parameters to make this work. The driver will
 158           be available until the real driver-model serial is running.
 159
 160 config DEBUG_UART_MESON
 161         bool "Amlogic Meson"
 162         depends on MESON_SERIAL
 163         help
 164           Select this to enable a debug UART using the serial_meson driver. You
 165           will need to provide parameters to make this work. The driver will
 166           be available until the real driver-model serial is running.
 167
 168 config DEBUG_UART_UARTLITE
 169         bool "Xilinx Uartlite"
 170         help
 171           Select this to enable a debug UART using the serial_uartlite driver.
 172           You will need to provide parameters to make this work. The driver will
 173           be available until the real driver-model serial is running.
 174
 175 config DEBUG_UART_ARM_DCC
 176         bool "ARM DCC"
 177         help
 178           Select this to enable a debug UART using the ARM JTAG DCC port.
 179           The DCC port can be used for very early debugging and doesn't require
 180           any additional setting like address/baudrate/clock. On systems without
 181           any serial interface this is the easiest way how to get console.
 182           Every ARM core has own DCC port which is the part of debug interface.
 183           This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
 184           architectures.
 185
 186 config DEBUG_MVEBU_A3700_UART
 187         bool "Marvell Armada 3700"
 188         help
 189           Select this to enable a debug UART using the serial_mvebu driver. You
 190           will need to provide parameters to make this work. The driver will
 191           be available until the real driver-model serial is running.
 192
 193 config DEBUG_UART_ZYNQ
 194         bool "Xilinx Zynq"
 195         help
 196           Select this to enable a debug UART using the serial_zynq driver. You
 197           will need to provide parameters to make this work. The driver will
 198           be available until the real driver-model serial is running.
 199
 200 config DEBUG_UART_APBUART
 201         depends on LEON3
 202         bool "Gaisler APBUART"
 203         help
 204           Select this to enable a debug UART using the serial_leon3 driver. You
 205           will need to provide parameters to make this work. The driver will
 206           be available until the real driver model serial is running.
 207
 208 config DEBUG_UART_PL010
 209         bool "pl010"
 210         help
 211           Select this to enable a debug UART using the pl01x driver with the
 212           PL010 UART type. You will need to provide parameters to make this
 213           work. The driver will be available until the real driver model
 214           serial is running.
 215
 216 config DEBUG_UART_PL011
 217         bool "pl011"
 218         help
 219           Select this to enable a debug UART using the pl01x driver with the
 220           PL011 UART type. You will need to provide parameters to make this
 221           work. The driver will be available until the real driver model
 222           serial is running.
 223
 224 config DEBUG_UART_PIC32
 225         bool "Microchip PIC32"
 226         depends on PIC32_SERIAL
 227         help
 228           Select this to enable a debug UART using the serial_pic32 driver. You
 229           will need to provide parameters to make this work. The driver will
 230           be available until the real driver model serial is running.
 231
 232 config DEBUG_UART_UNIPHIER
 233         bool "UniPhier on-chip UART"
 234         depends on ARCH_UNIPHIER
 235         help
 236           Select this to enable a debug UART using the UniPhier on-chip UART.
 237           You will need to provide DEBUG_UART_BASE to make this work.  The
 238           driver will be available until the real driver-model serial is
 239           running.
 240
 241 endchoice
 242
 243 config DEBUG_UART_BASE
 244         hex "Base address of UART"
 245         depends on DEBUG_UART
 246         help
 247           This is the base address of your UART for memory-mapped UARTs.
 248
 249           A default should be provided by your board, but if not you will need
 250           to use the correct value here.
 251
 252 config DEBUG_UART_CLOCK
 253         int "UART input clock"
 254         depends on DEBUG_UART
 255         help
 256           The UART input clock determines the speed of the internal UART
 257           circuitry. The baud rate is derived from this by dividing the input
 258           clock down.
 259
 260           A default should be provided by your board, but if not you will need
 261           to use the correct value here.
 262
 263 config DEBUG_UART_SHIFT
 264         int "UART register shift"
 265         depends on DEBUG_UART
 266         default 0 if DEBUG_UART
 267         help
 268           Some UARTs (notably ns16550) support different register layouts
 269           where the registers are spaced either as bytes, words or some other
 270           value. Use this value to specify the shift to use, where 0=byte
 271           registers, 2=32-bit word registers, etc.
 272
 273 config DEBUG_UART_BOARD_INIT
 274         bool "Enable board-specific debug UART init"
 275         depends on DEBUG_UART
 276         help
 277           Some boards need to set things up before the debug UART can be used.
 278           On these boards a call to debug_uart_init() is insufficient. When
 279           this option is enabled, the function board_debug_uart_init() will
 280           be called when debug_uart_init() is called. You can put any code
 281           here that is needed to set up the UART ready for use, such as set
 282           pin multiplexing or enable clocks.
 283
 284 config DEBUG_UART_ANNOUNCE
 285         bool "Show a message when the debug UART starts up"
 286         depends on DEBUG_UART
 287         help
 288           Enable this option to show a message when the debug UART is ready
 289           for use. You will see a message like "<debug_uart> " as soon as
 290           U-Boot has the UART ready for use (i.e. your code calls
 291           debug_uart_init()). This can be useful just as a check that
 292           everything is working.
 293
 294 config DEBUG_UART_SKIP_INIT
 295         bool "Skip UART initialization"
 296         help
 297           Select this if the UART you want to use for debug output is already
 298           initialized by the time U-Boot starts its execution.
 299
 300 config ALTERA_JTAG_UART
 301         bool "Altera JTAG UART support"
 302         depends on DM_SERIAL
 303         help
 304           Select this to enable an JTAG UART for Altera devices.The JTAG UART
 305           core implements a method to communicate serial character streams
 306           between a host PC and a Qsys system on an Altera FPGA. Please find
 307           details on the "Embedded Peripherals IP User Guide" of Altera.
 308
 309 config ALTERA_JTAG_UART_BYPASS
 310         bool "Bypass output when no connection"
 311         depends on ALTERA_JTAG_UART
 312         help
 313           Bypass console output and keep going even if there is no JTAG
 314           terminal connection with the host. The console output will resume
 315           once the JTAG terminal is connected. Without the bypass, the console
 316           output will wait forever until a JTAG terminal is connected. If you
 317           not are sure, say Y.
 318
 319 config ALTERA_UART
 320         bool "Altera UART support"
 321         depends on DM_SERIAL
 322         help
 323           Select this to enable an UART for Altera devices. Please find
 324           details on the "Embedded Peripherals IP User Guide" of Altera.
 325
 326 config AR933X_UART
 327         bool "QCA/Atheros ar933x UART support"
 328         depends on DM_SERIAL && SOC_AR933X
 329         help
 330           Select this to enable UART support for QCA/Atheros ar933x
 331           devices. This driver uses driver model and requires a device
 332           tree binding to operate, please refer to the document at
 333           doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
 334
 335 config ATMEL_USART
 336         bool "Atmel USART support"
 337         help
 338           Select this to enable USART support for Atmel SoCs. It can be
 339           configured in the device tree, and input clock frequency can
 340           be got from the clk node.
 341
 342 config FSL_LPUART
 343         bool "Freescale LPUART support"
 344         help
 345           Select this to enable a Low Power UART for Freescale VF610 and
 346           QorIQ Layerscape devices.
 347
 348 config MVEBU_A3700_UART
 349         bool "UART support for Armada 3700"
 350         default n
 351         help
 352           Choose this option to add support for UART driver on the Marvell
 353           Armada 3700 SoC. The base address is configured via DT.
 354
 355 config MXC_UART
 356         bool "IMX serial port support"
 357         depends on MX5 || MX6
 358         help
 359           If you have a machine based on a Motorola IMX CPU you
 360           can enable its onboard serial port by enabling this option.
 361
 362 config PIC32_SERIAL
 363         bool "Support for Microchip PIC32 on-chip UART"
 364         depends on DM_SERIAL && MACH_PIC32
 365         default y
 366         help
 367           Support for the UART found on Microchip PIC32 SoC's.
 368
 369 config SYS_NS16550
 370         bool "NS16550 UART or compatible"
 371         help
 372           Support NS16550 UART or compatible. This can be enabled in the
 373           device tree with the correct input clock frequency. If the input
 374           clock frequency is not defined in the device tree, the macro
 375           CONFIG_SYS_NS16550_CLK defined in a legacy board header file will
 376           be used. It can be a constant or a function to get clock, eg,
 377           get_serial_clock().
 378
 379 config ROCKCHIP_SERIAL
 380         bool "Rockchip on-chip UART support"
 381         depends on DM_SERIAL && SPL_OF_PLATDATA
 382         help
 383           Select this to enable a debug UART for Rockchip devices when using
 384           CONFIG_SPL_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
 385           This uses the ns16550 driver, converting the platdata from of-platdata
 386           to the ns16550 format.
 387
 388 config SANDBOX_SERIAL
 389         bool "Sandbox UART support"
 390         depends on SANDBOX
 391         help
 392           Select this to enable a seral UART for sandbox. This is required to
 393           operate correctly, otherwise you will see no serial output from
 394           sandbox. The emulated UART will display to the console and console
 395           input will be fed into the UART. This allows you to interact with
 396           U-Boot.
 397
 398           The operation of the console is controlled by the -t command-line
 399           flag. In raw mode, U-Boot sees all characters from the terminal
 400           before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
 401           is processed by the terminal, and terminates U-Boot. Valid options
 402           are:
 403
 404              -t raw-with-sigs   Raw mode, Ctrl-C will terminate U-Boot
 405              -t raw             Raw mode, Ctrl-C is processed by U-Boot
 406              -t cooked          Cooked mode, Ctrl-C terminates
 407
 408 config UNIPHIER_SERIAL
 409         bool "Support for UniPhier on-chip UART"
 410         depends on ARCH_UNIPHIER
 411         default y
 412         help
 413           If you have a UniPhier based board and want to use the on-chip
 414           serial ports, say Y to this option. If unsure, say N.
 415
 416 config XILINX_UARTLITE
 417         bool "Xilinx Uarlite support"
 418         depends on DM_SERIAL && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx)
 419         help
 420           If you have a Xilinx based board and want to use the uartlite
 421           serial ports, say Y to this option. If unsure, say N.
 422
 423 config MESON_SERIAL
 424         bool "Support for Amlogic Meson UART"
 425         depends on DM_SERIAL && ARCH_MESON
 426         help
 427           If you have an Amlogic Meson based board and want to use the on-chip
 428           serial ports, say Y to this option. If unsure, say N.
 429
 430 config MSM_SERIAL
 431         bool "Qualcomm on-chip UART"
 432         depends on DM_SERIAL
 433         help
 434           Support Data Mover UART used on Qualcomm Snapdragon SoCs.
 435           It should support all Qualcomm devices with UARTDM version 1.4,
 436           for example APQ8016 and MSM8916.
 437           Single baudrate is supported in current implementation (115200).
 438
 439 config PXA_SERIAL
 440         bool "PXA serial port support"
 441         help
 442           If you have a machine based on a Marvell XScale PXA2xx CPU you
 443           can enable its onboard serial ports by enabling this option.
 444
 445 config STI_ASC_SERIAL
 446         bool "STMicroelectronics on-chip UART"
 447         depends on DM_SERIAL && ARCH_STI
 448         help
 449           Select this to enable Asynchronous Serial Controller available
 450           on STiH410 SoC. This is a basic implementation,  it supports
 451           following baudrate 9600, 19200, 38400, 57600 and 115200.
 452
 453 endmenu