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_ATMEL
 102         bool "Atmel USART"
 103         help
 104           Select this to enable a debug UART using the atmel usart 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_UART_NS16550
 109         bool "ns16550"
 110         help
 111           Select this to enable a debug UART using the ns16550 driver. You
 112           will need to provide parameters to make this work. The driver will
 113           be available until the real driver model serial is running.
 114
 115 config DEBUG_EFI_CONSOLE
 116         bool "EFI"
 117         depends on EFI_APP
 118         help
 119           Select this to enable a debug console which calls back to EFI to
 120           output to the console. This can be useful for early debugging of
 121           U-Boot when running on top of EFI (Extensive Firmware Interface).
 122           This is a type of BIOS used by PCs.
 123
 124 config DEBUG_UART_S5P
 125         bool "Samsung S5P"
 126         help
 127           Select this to enable a debug UART using the serial_s5p driver. You
 128           will need to provide parameters to make this work. The driver will
 129           be available until the real driver-model serial is running.
 130
 131 config DEBUG_UART_MESON
 132         bool "Amlogic Meson"
 133         depends on MESON_SERIAL
 134         help
 135           Select this to enable a debug UART using the serial_meson driver. You
 136           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_UARTLITE
 140         bool "Xilinx Uartlite"
 141         help
 142           Select this to enable a debug UART using the serial_uartlite driver.
 143           You will need to provide parameters to make this work. The driver will
 144           be available until the real driver-model serial is running.
 145
 146 config DEBUG_UART_ARM_DCC
 147         bool "ARM DCC"
 148         help
 149           Select this to enable a debug UART using the ARM JTAG DCC port.
 150           The DCC port can be used for very early debugging and doesn't require
 151           any additional setting like address/baudrate/clock. On systems without
 152           any serial interface this is the easiest way how to get console.
 153           Every ARM core has own DCC port which is the part of debug interface.
 154           This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
 155           architectures.
 156
 157 config DEBUG_MVEBU_A3700_UART
 158         bool "Marvell Armada 3700"
 159         help
 160           Select this to enable a debug UART using the serial_mvebu 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_ZYNQ
 165         bool "Xilinx Zynq"
 166         help
 167           Select this to enable a debug UART using the serial_zynq driver. You
 168           will need to provide parameters to make this work. The driver will
 169           be available until the real driver-model serial is running.
 170
 171 config DEBUG_UART_APBUART
 172         depends on LEON3
 173         bool "Gaisler APBUART"
 174         help
 175           Select this to enable a debug UART using the serial_leon3 driver. You
 176           will need to provide parameters to make this work. The driver will
 177           be available until the real driver model serial is running.
 178
 179 config DEBUG_UART_PL010
 180         bool "pl010"
 181         help
 182           Select this to enable a debug UART using the pl01x driver with the
 183           PL010 UART type. You will need to provide parameters to make this
 184           work. The driver will be available until the real driver model
 185           serial is running.
 186
 187 config DEBUG_UART_PL011
 188         bool "pl011"
 189         help
 190           Select this to enable a debug UART using the pl01x driver with the
 191           PL011 UART type. You will need to provide parameters to make this
 192           work. The driver will be available until the real driver model
 193           serial is running.
 194
 195 config DEBUG_UART_PIC32
 196         bool "Microchip PIC32"
 197         depends on PIC32_SERIAL
 198         help
 199           Select this to enable a debug UART using the serial_pic32 driver. You
 200           will need to provide parameters to make this work. The driver will
 201           be available until the real driver model serial is running.
 202
 203 config DEBUG_UART_UNIPHIER
 204         bool "UniPhier on-chip UART"
 205         depends on ARCH_UNIPHIER
 206         help
 207           Select this to enable a debug UART using the UniPhier on-chip UART.
 208           You will need to provide DEBUG_UART_BASE to make this work.  The
 209           driver will be available until the real driver-model serial is
 210           running.
 211
 212 endchoice
 213
 214 config DEBUG_UART_BASE
 215         hex "Base address of UART"
 216         depends on DEBUG_UART
 217         help
 218           This is the base address of your UART for memory-mapped UARTs.
 219
 220           A default should be provided by your board, but if not you will need
 221           to use the correct value here.
 222
 223 config DEBUG_UART_CLOCK
 224         int "UART input clock"
 225         depends on DEBUG_UART
 226         help
 227           The UART input clock determines the speed of the internal UART
 228           circuitry. The baud rate is derived from this by dividing the input
 229           clock down.
 230
 231           A default should be provided by your board, but if not you will need
 232           to use the correct value here.
 233
 234 config DEBUG_UART_SHIFT
 235         int "UART register shift"
 236         depends on DEBUG_UART
 237         default 0 if DEBUG_UART
 238         help
 239           Some UARTs (notably ns16550) support different register layouts
 240           where the registers are spaced either as bytes, words or some other
 241           value. Use this value to specify the shift to use, where 0=byte
 242           registers, 2=32-bit word registers, etc.
 243
 244 config DEBUG_UART_BOARD_INIT
 245         bool "Enable board-specific debug UART init"
 246         depends on DEBUG_UART
 247         help
 248           Some boards need to set things up before the debug UART can be used.
 249           On these boards a call to debug_uart_init() is insufficient. When
 250           this option is enabled, the function board_debug_uart_init() will
 251           be called when debug_uart_init() is called. You can put any code
 252           here that is needed to set up the UART ready for use, such as set
 253           pin multiplexing or enable clocks.
 254
 255 config DEBUG_UART_ANNOUNCE
 256         bool "Show a message when the debug UART starts up"
 257         depends on DEBUG_UART
 258         help
 259           Enable this option to show a message when the debug UART is ready
 260           for use. You will see a message like "<debug_uart> " as soon as
 261           U-Boot has the UART ready for use (i.e. your code calls
 262           debug_uart_init()). This can be useful just as a check that
 263           everything is working.
 264
 265 config DEBUG_UART_SKIP_INIT
 266         bool "Skip UART initialization"
 267         help
 268           Select this if the UART you want to use for debug output is already
 269           initialized by the time U-Boot starts its execution.
 270
 271 config ALTERA_JTAG_UART
 272         bool "Altera JTAG UART support"
 273         depends on DM_SERIAL
 274         help
 275           Select this to enable an JTAG UART for Altera devices.The JTAG UART
 276           core implements a method to communicate serial character streams
 277           between a host PC and a Qsys system on an Altera FPGA. Please find
 278           details on the "Embedded Peripherals IP User Guide" of Altera.
 279
 280 config ALTERA_JTAG_UART_BYPASS
 281         bool "Bypass output when no connection"
 282         depends on ALTERA_JTAG_UART
 283         help
 284           Bypass console output and keep going even if there is no JTAG
 285           terminal connection with the host. The console output will resume
 286           once the JTAG terminal is connected. Without the bypass, the console
 287           output will wait forever until a JTAG terminal is connected. If you
 288           not are sure, say Y.
 289
 290 config ALTERA_UART
 291         bool "Altera UART support"
 292         depends on DM_SERIAL
 293         help
 294           Select this to enable an UART for Altera devices. Please find
 295           details on the "Embedded Peripherals IP User Guide" of Altera.
 296
 297 config AR933X_UART
 298         bool "QCA/Atheros ar933x UART support"
 299         depends on DM_SERIAL && SOC_AR933X
 300         help
 301           Select this to enable UART support for QCA/Atheros ar933x
 302           devices. This driver uses driver model and requires a device
 303           tree binding to operate, please refer to the document at
 304           doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
 305
 306 config ATMEL_USART
 307         bool "Atmel USART support"
 308         help
 309           Select this to enable USART support for Atmel SoCs. It can be
 310           configured in the device tree, and input clock frequency can
 311           be got from the clk node.
 312
 313 config FSL_LPUART
 314         bool "Freescale LPUART support"
 315         help
 316           Select this to enable a Low Power UART for Freescale VF610 and
 317           QorIQ Layerscape devices.
 318
 319 config MVEBU_A3700_UART
 320         bool "UART support for Armada 3700"
 321         default n
 322         help
 323           Choose this option to add support for UART driver on the Marvell
 324           Armada 3700 SoC. The base address is configured via DT.
 325
 326 config MXC_UART
 327         bool "IMX serial port support"
 328         depends on MX5 || MX6
 329         help
 330           If you have a machine based on a Motorola IMX CPU you
 331           can enable its onboard serial port by enabling this option.
 332
 333 config PIC32_SERIAL
 334         bool "Support for Microchip PIC32 on-chip UART"
 335         depends on DM_SERIAL && MACH_PIC32
 336         default y
 337         help
 338           Support for the UART found on Microchip PIC32 SoC's.
 339
 340 config SYS_NS16550
 341         bool "NS16550 UART or compatible"
 342         help
 343           Support NS16550 UART or compatible. This can be enabled in the
 344           device tree with the correct input clock frequency. If the input
 345           clock frequency is not defined in the device tree, the macro
 346           CONFIG_SYS_NS16550_CLK defined in a legacy board header file will
 347           be used. It can be a constant or a function to get clock, eg,
 348           get_serial_clock().
 349
 350 config ROCKCHIP_SERIAL
 351         bool "Rockchip on-chip UART support"
 352         depends on DM_SERIAL && SPL_OF_PLATDATA
 353         help
 354           Select this to enable a debug UART for Rockchip devices when using
 355           CONFIG_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
 356           This uses the ns16550 driver, converting the platdata from of-platdata
 357           to the ns16550 format.
 358
 359 config SANDBOX_SERIAL
 360         bool "Sandbox UART support"
 361         depends on SANDBOX
 362         help
 363           Select this to enable a seral UART for sandbox. This is required to
 364           operate correctly, otherwise you will see no serial output from
 365           sandbox. The emulated UART will display to the console and console
 366           input will be fed into the UART. This allows you to interact with
 367           U-Boot.
 368
 369           The operation of the console is controlled by the -t command-line
 370           flag. In raw mode, U-Boot sees all characters from the terminal
 371           before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
 372           is processed by the terminal, and terminates U-Boot. Valid options
 373           are:
 374
 375              -t raw-with-sigs   Raw mode, Ctrl-C will terminate U-Boot
 376              -t raw             Raw mode, Ctrl-C is processed by U-Boot
 377              -t cooked          Cooked mode, Ctrl-C terminates
 378
 379 config UNIPHIER_SERIAL
 380         bool "Support for UniPhier on-chip UART"
 381         depends on ARCH_UNIPHIER
 382         default y
 383         help
 384           If you have a UniPhier based board and want to use the on-chip
 385           serial ports, say Y to this option. If unsure, say N.
 386
 387 config XILINX_UARTLITE
 388         bool "Xilinx Uarlite support"
 389         depends on DM_SERIAL && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx)
 390         help
 391           If you have a Xilinx based board and want to use the uartlite
 392           serial ports, say Y to this option. If unsure, say N.
 393
 394 config MESON_SERIAL
 395         bool "Support for Amlogic Meson UART"
 396         depends on DM_SERIAL && ARCH_MESON
 397         help
 398           If you have an Amlogic Meson based board and want to use the on-chip
 399           serial ports, say Y to this option. If unsure, say N.
 400
 401 config MSM_SERIAL
 402         bool "Qualcomm on-chip UART"
 403         depends on DM_SERIAL
 404         help
 405           Support Data Mover UART used on Qualcomm Snapdragon SoCs.
 406           It should support all Qualcomm devices with UARTDM version 1.4,
 407           for example APQ8016 and MSM8916.
 408           Single baudrate is supported in current implementation (115200).
 409
 410 config PXA_SERIAL
 411         bool "PXA serial port support"
 412         help
 413           If you have a machine based on a Marvell XScale PXA2xx CPU you
 414           can enable its onboard serial ports by enabling this option.
 415
 416 endmenu