xref: /openbmc/u-boot/drivers/serial/Kconfig (revision d9797409)
1#
2# Serial device configuration
3#
4
5menu "Serial drivers"
6
7config 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
16config 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
27config 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
37config 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
47config CONS_INDEX
48	int "UART used for console"
49	depends on ARCH_SUNXI
50	default 2 if MACH_SUN5I
51	default 5 if MACH_SUN8I_A23 || MACH_SUN8I_A33
52	default 1
53	help
54	  Configures the console index.
55	  For Allwinner SoC., default values are 2 for SUN5I and 5 for A23/A33.
56	  Otherwise, the index equals 1.
57
58config DM_SERIAL
59	bool "Enable Driver Model for serial drivers"
60	depends on DM
61	help
62	  Enable driver model for serial. This replaces
63	  drivers/serial/serial.c with the serial uclass, which
64	  implements serial_putc() etc. The uclass interface is
65	  defined in include/serial.h.
66
67config SPL_DM_SERIAL
68	bool "Enable Driver Model for serial drivers in SPL"
69	depends on DM_SERIAL
70	default y if SPL && DM_SERIAL
71	help
72	  Enable driver model for serial in SPL. This replaces
73	  drivers/serial/serial.c with the serial uclass, which
74	  implements serial_putc() etc. The uclass interface is
75	  defined in include/serial.h.
76
77config TPL_DM_SERIAL
78	bool "Enable Driver Model for serial drivers in TPL"
79	depends on DM_SERIAL
80	default y if TPL && DM_SERIAL
81	help
82	  Enable driver model for serial in TPL. This replaces
83	  drivers/serial/serial.c with the serial uclass, which
84	  implements serial_putc() etc. The uclass interface is
85	  defined in include/serial.h.
86
87config DEBUG_UART
88	bool "Enable an early debug UART for debugging"
89	help
90	  The debug UART is intended for use very early in U-Boot to debug
91	  problems when an ICE or other debug mechanism is not available.
92
93	  To use it you should:
94	  - Make sure your UART supports this interface
95	  - Enable CONFIG_DEBUG_UART
96	  - Enable the CONFIG for your UART to tell it to provide this interface
97	        (e.g. CONFIG_DEBUG_UART_NS16550)
98	  - Define the required settings as needed (see below)
99	  - Call debug_uart_init() before use
100	  - Call debug_uart_putc() to output a character
101
102	  Depending on your platform it may be possible to use this UART before
103	  a stack is available.
104
105	  If your UART does not support this interface you can probably add
106	  support quite easily. Remember that you cannot use driver model and
107	  it is preferred to use no stack.
108
109	  You must not use this UART once driver model is working and the
110	  serial drivers are up and running (done in serial_init()). Otherwise
111	  the drivers may conflict and you will get strange output.
112
113choice
114	prompt "Select which UART will provide the debug UART"
115	depends on DEBUG_UART
116	default DEBUG_UART_NS16550
117
118config DEBUG_UART_ALTERA_JTAGUART
119	bool "Altera JTAG UART"
120	help
121	  Select this to enable a debug UART using the altera_jtag_uart driver.
122	  You will need to provide parameters to make this work. The driver will
123	  be available until the real driver model serial is running.
124
125config DEBUG_UART_ALTERA_UART
126	bool "Altera UART"
127	help
128	  Select this to enable a debug UART using the altera_uart driver.
129	  You will need to provide parameters to make this work. The driver will
130	  be available until the real driver model serial is running.
131
132config DEBUG_UART_AR933X
133	bool "QCA/Atheros ar933x"
134	depends on AR933X_UART
135	help
136	  Select this to enable a debug UART using the ar933x uart driver.
137	  You will need to provide parameters to make this work. The
138	  driver will be available until the real driver model serial is
139	  running.
140
141config DEBUG_UART_ATMEL
142	bool "Atmel USART"
143	help
144	  Select this to enable a debug UART using the atmel usart 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
148config DEBUG_UART_BCM6345
149	bool "BCM6345 UART"
150	depends on BCM6345_SERIAL
151	help
152	  Select this to enable a debug UART on BCM6345 SoCs. You
153	  will need to provide parameters to make this work. The driver will
154	  be available until the real driver model serial is running.
155
156config DEBUG_UART_NS16550
157	bool "ns16550"
158	help
159	  Select this to enable a debug UART using the ns16550 driver. You
160	  will need to provide parameters to make this work. The driver will
161	  be available until the real driver model serial is running.
162
163config DEBUG_EFI_CONSOLE
164	bool "EFI"
165	depends on EFI_APP
166	help
167	  Select this to enable a debug console which calls back to EFI to
168	  output to the console. This can be useful for early debugging of
169	  U-Boot when running on top of EFI (Extensive Firmware Interface).
170	  This is a type of BIOS used by PCs.
171
172config DEBUG_UART_S5P
173	bool "Samsung S5P"
174	help
175	  Select this to enable a debug UART using the serial_s5p 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
179config DEBUG_UART_MESON
180	bool "Amlogic Meson"
181	depends on MESON_SERIAL
182	help
183	  Select this to enable a debug UART using the serial_meson driver. You
184	  will need to provide parameters to make this work. The driver will
185	  be available until the real driver-model serial is running.
186
187config DEBUG_UART_UARTLITE
188	bool "Xilinx Uartlite"
189	help
190	  Select this to enable a debug UART using the serial_uartlite driver.
191	  You will need to provide parameters to make this work. The driver will
192	  be available until the real driver-model serial is running.
193
194config DEBUG_UART_ARM_DCC
195	bool "ARM DCC"
196	help
197	  Select this to enable a debug UART using the ARM JTAG DCC port.
198	  The DCC port can be used for very early debugging and doesn't require
199	  any additional setting like address/baudrate/clock. On systems without
200	  any serial interface this is the easiest way how to get console.
201	  Every ARM core has own DCC port which is the part of debug interface.
202	  This port is available at least on ARMv6, ARMv7, ARMv8 and XScale
203	  architectures.
204
205config DEBUG_MVEBU_A3700_UART
206	bool "Marvell Armada 3700"
207	help
208	  Select this to enable a debug UART using the serial_mvebu 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
212config DEBUG_UART_ZYNQ
213	bool "Xilinx Zynq"
214	help
215	  Select this to enable a debug UART using the serial_zynq driver. You
216	  will need to provide parameters to make this work. The driver will
217	  be available until the real driver-model serial is running.
218
219config DEBUG_UART_APBUART
220	depends on LEON3
221	bool "Gaisler APBUART"
222	help
223	  Select this to enable a debug UART using the serial_leon3 driver. You
224	  will need to provide parameters to make this work. The driver will
225	  be available until the real driver model serial is running.
226
227config DEBUG_UART_PL010
228	bool "pl010"
229	help
230	  Select this to enable a debug UART using the pl01x driver with the
231	  PL010 UART type. You will need to provide parameters to make this
232	  work. The driver will be available until the real driver model
233	  serial is running.
234
235config DEBUG_UART_PL011
236	bool "pl011"
237	help
238	  Select this to enable a debug UART using the pl01x driver with the
239	  PL011 UART type. You will need to provide parameters to make this
240	  work. The driver will be available until the real driver model
241	  serial is running.
242
243config DEBUG_UART_PIC32
244	bool "Microchip PIC32"
245	depends on PIC32_SERIAL
246	help
247	  Select this to enable a debug UART using the serial_pic32 driver. You
248	  will need to provide parameters to make this work. The driver will
249	  be available until the real driver model serial is running.
250
251config DEBUG_UART_UNIPHIER
252	bool "UniPhier on-chip UART"
253	depends on ARCH_UNIPHIER
254	help
255	  Select this to enable a debug UART using the UniPhier on-chip UART.
256	  You will need to provide DEBUG_UART_BASE to make this work.  The
257	  driver will be available until the real driver-model serial is
258	  running.
259
260config DEBUG_UART_OMAP
261	bool "OMAP uart"
262	help
263	  Select this to enable a debug UART using the omap ns16550 driver.
264	  You will need to provide parameters to make this work. The driver
265	  will be available until the real driver model serial is running.
266
267endchoice
268
269config DEBUG_UART_BASE
270	hex "Base address of UART"
271	depends on DEBUG_UART
272	help
273	  This is the base address of your UART for memory-mapped UARTs.
274
275	  A default should be provided by your board, but if not you will need
276	  to use the correct value here.
277
278config DEBUG_UART_CLOCK
279	int "UART input clock"
280	depends on DEBUG_UART
281	help
282	  The UART input clock determines the speed of the internal UART
283	  circuitry. The baud rate is derived from this by dividing the input
284	  clock down.
285
286	  A default should be provided by your board, but if not you will need
287	  to use the correct value here.
288
289config DEBUG_UART_SHIFT
290	int "UART register shift"
291	depends on DEBUG_UART
292	default 0 if DEBUG_UART
293	help
294	  Some UARTs (notably ns16550) support different register layouts
295	  where the registers are spaced either as bytes, words or some other
296	  value. Use this value to specify the shift to use, where 0=byte
297	  registers, 2=32-bit word registers, etc.
298
299config DEBUG_UART_BOARD_INIT
300	bool "Enable board-specific debug UART init"
301	depends on DEBUG_UART
302	help
303	  Some boards need to set things up before the debug UART can be used.
304	  On these boards a call to debug_uart_init() is insufficient. When
305	  this option is enabled, the function board_debug_uart_init() will
306	  be called when debug_uart_init() is called. You can put any code
307	  here that is needed to set up the UART ready for use, such as set
308	  pin multiplexing or enable clocks.
309
310config DEBUG_UART_ANNOUNCE
311	bool "Show a message when the debug UART starts up"
312	depends on DEBUG_UART
313	help
314	  Enable this option to show a message when the debug UART is ready
315	  for use. You will see a message like "<debug_uart> " as soon as
316	  U-Boot has the UART ready for use (i.e. your code calls
317	  debug_uart_init()). This can be useful just as a check that
318	  everything is working.
319
320config DEBUG_UART_SKIP_INIT
321	bool "Skip UART initialization"
322	help
323	  Select this if the UART you want to use for debug output is already
324	  initialized by the time U-Boot starts its execution.
325
326config ALTERA_JTAG_UART
327	bool "Altera JTAG UART support"
328	depends on DM_SERIAL
329	help
330	  Select this to enable an JTAG UART for Altera devices.The JTAG UART
331	  core implements a method to communicate serial character streams
332	  between a host PC and a Qsys system on an Altera FPGA. Please find
333	  details on the "Embedded Peripherals IP User Guide" of Altera.
334
335config ALTERA_JTAG_UART_BYPASS
336	bool "Bypass output when no connection"
337	depends on ALTERA_JTAG_UART
338	help
339	  Bypass console output and keep going even if there is no JTAG
340	  terminal connection with the host. The console output will resume
341	  once the JTAG terminal is connected. Without the bypass, the console
342	  output will wait forever until a JTAG terminal is connected. If you
343	  not are sure, say Y.
344
345config ALTERA_UART
346	bool "Altera UART support"
347	depends on DM_SERIAL
348	help
349	  Select this to enable an UART for Altera devices. Please find
350	  details on the "Embedded Peripherals IP User Guide" of Altera.
351
352config AR933X_UART
353	bool "QCA/Atheros ar933x UART support"
354	depends on DM_SERIAL && SOC_AR933X
355	help
356	  Select this to enable UART support for QCA/Atheros ar933x
357	  devices. This driver uses driver model and requires a device
358	  tree binding to operate, please refer to the document at
359	  doc/device-tree-bindings/serial/qca,ar9330-uart.txt.
360
361config ATMEL_USART
362	bool "Atmel USART support"
363	help
364	  Select this to enable USART support for Atmel SoCs. It can be
365	  configured in the device tree, and input clock frequency can
366	  be got from the clk node.
367
368config BCM6345_SERIAL
369	bool "Support for BCM6345 UART"
370	depends on DM_SERIAL && ARCH_BMIPS
371	help
372	  Select this to enable UART on BCM6345 SoCs.
373
374config FSL_LPUART
375	bool "Freescale LPUART support"
376	help
377	  Select this to enable a Low Power UART for Freescale VF610 and
378	  QorIQ Layerscape devices.
379
380config MVEBU_A3700_UART
381	bool "UART support for Armada 3700"
382	default n
383	help
384	  Choose this option to add support for UART driver on the Marvell
385	  Armada 3700 SoC. The base address is configured via DT.
386
387config MXC_UART
388	bool "IMX serial port support"
389	depends on MX5 || MX6
390	help
391	  If you have a machine based on a Motorola IMX CPU you
392	  can enable its onboard serial port by enabling this option.
393
394config PIC32_SERIAL
395	bool "Support for Microchip PIC32 on-chip UART"
396	depends on DM_SERIAL && MACH_PIC32
397	default y
398	help
399	  Support for the UART found on Microchip PIC32 SoC's.
400
401config SYS_NS16550
402	bool "NS16550 UART or compatible"
403	help
404	  Support NS16550 UART or compatible. This can be enabled in the
405	  device tree with the correct input clock frequency. If the input
406	  clock frequency is not defined in the device tree, the macro
407	  CONFIG_SYS_NS16550_CLK defined in a legacy board header file will
408	  be used. It can be a constant or a function to get clock, eg,
409	  get_serial_clock().
410
411config INTEL_MID_SERIAL
412	bool "Intel MID platform UART support"
413	depends on DM_SERIAL && OF_CONTROL
414	depends on INTEL_MID
415	select SYS_NS16550
416	help
417	  Select this to enable a UART for Intel MID platforms.
418	  This uses the ns16550 driver as a library.
419
420config ROCKCHIP_SERIAL
421	bool "Rockchip on-chip UART support"
422	depends on DM_SERIAL && SPL_OF_PLATDATA
423	help
424	  Select this to enable a debug UART for Rockchip devices when using
425	  CONFIG_SPL_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt).
426	  This uses the ns16550 driver, converting the platdata from of-platdata
427	  to the ns16550 format.
428
429config SANDBOX_SERIAL
430	bool "Sandbox UART support"
431	depends on SANDBOX
432	help
433	  Select this to enable a seral UART for sandbox. This is required to
434	  operate correctly, otherwise you will see no serial output from
435	  sandbox. The emulated UART will display to the console and console
436	  input will be fed into the UART. This allows you to interact with
437	  U-Boot.
438
439	  The operation of the console is controlled by the -t command-line
440	  flag. In raw mode, U-Boot sees all characters from the terminal
441	  before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
442	  is processed by the terminal, and terminates U-Boot. Valid options
443	  are:
444
445	     -t raw-with-sigs	Raw mode, Ctrl-C will terminate U-Boot
446	     -t raw		Raw mode, Ctrl-C is processed by U-Boot
447	     -t cooked		Cooked mode, Ctrl-C terminates
448
449config UNIPHIER_SERIAL
450	bool "Support for UniPhier on-chip UART"
451	depends on ARCH_UNIPHIER
452	default y
453	help
454	  If you have a UniPhier based board and want to use the on-chip
455	  serial ports, say Y to this option. If unsure, say N.
456
457config XILINX_UARTLITE
458	bool "Xilinx Uarlite support"
459	depends on DM_SERIAL && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx)
460	help
461	  If you have a Xilinx based board and want to use the uartlite
462	  serial ports, say Y to this option. If unsure, say N.
463
464config MESON_SERIAL
465	bool "Support for Amlogic Meson UART"
466	depends on DM_SERIAL && ARCH_MESON
467	help
468	  If you have an Amlogic Meson based board and want to use the on-chip
469	  serial ports, say Y to this option. If unsure, say N.
470
471config MSM_SERIAL
472	bool "Qualcomm on-chip UART"
473	depends on DM_SERIAL
474	help
475	  Support Data Mover UART used on Qualcomm Snapdragon SoCs.
476	  It should support all Qualcomm devices with UARTDM version 1.4,
477	  for example APQ8016 and MSM8916.
478	  Single baudrate is supported in current implementation (115200).
479
480config PXA_SERIAL
481	bool "PXA serial port support"
482	help
483	  If you have a machine based on a Marvell XScale PXA2xx CPU you
484	  can enable its onboard serial ports by enabling this option.
485
486config STI_ASC_SERIAL
487	bool "STMicroelectronics on-chip UART"
488	depends on DM_SERIAL && ARCH_STI
489	help
490	  Select this to enable Asynchronous Serial Controller available
491	  on STiH410 SoC. This is a basic implementation,  it supports
492	  following baudrate 9600, 19200, 38400, 57600 and 115200.
493
494config MPC8XX_CONS
495	bool "Console driver for MPC8XX"
496	depends on 8xx
497	default y
498
499choice
500	prompt "Console port"
501	default 8xx_CONS_SMC1
502	depends on MPC8XX_CONS
503	help
504	  Depending on board, select one serial port
505	  (CONFIG_8xx_CONS_SMC1 or CONFIG_8xx_CONS_SMC2)
506
507config 8xx_CONS_SMC1
508	bool "SMC1"
509
510config 8xx_CONS_SMC2
511	bool "SMC2"
512
513endchoice
514
515config SYS_SMC_RXBUFLEN
516	int "Console Rx buffer length"
517	depends on MPC8XX_CONS
518	default 1
519	help
520	  With CONFIG_SYS_SMC_RXBUFLEN it is possible to define
521	  the maximum receive buffer length for the SMC.
522	  This option is actual only for 8xx possible.
523	  If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE
524	  must be defined, to setup the maximum idle timeout for
525	  the SMC.
526
527config SYS_MAXIDLE
528	int "maximum idle timeout"
529	depends on MPC8XX_CONS
530	default 0
531
532config SYS_BRGCLK_PRESCALE
533	int "BRG Clock Prescale"
534	depends on MPC8XX_CONS
535	default 1
536
537config SYS_SDSR
538	hex "SDSR Value"
539	depends on MPC8XX_CONS
540	default 0x83
541
542config SYS_SDMR
543	hex "SDMR Value"
544	depends on MPC8XX_CONS
545	default 0
546
547endmenu
548