blob: 4829284216c2fcb6eb5b280ce62163b496008da4 [file] [log] [blame]
Masahiro Yamada57ad8ee2014-10-23 22:26:09 +09001config DM_SERIAL
2 bool "Enable Driver Model for serial drivers"
3 depends on DM
4 help
Simon Glassd8b771d2015-02-05 21:41:35 -07005 Enable driver model for serial. This replaces
6 drivers/serial/serial.c with the serial uclass, which
7 implements serial_putc() etc. The uclass interface is
8 defined in include/serial.h.
Masahiro Yamada4261c642014-10-23 22:26:11 +09009
Simon Glassbac6fd82015-01-26 18:27:07 -070010config DEBUG_UART
11 bool "Enable an early debug UART for debugging"
12 help
13 The debug UART is intended for use very early in U-Boot to debug
14 problems when an ICE or other debug mechanism is not available.
15
16 To use it you should:
17 - Make sure your UART supports this interface
18 - Enable CONFIG_DEBUG_UART
19 - Enable the CONFIG for your UART to tell it to provide this interface
20 (e.g. CONFIG_DEBUG_UART_NS16550)
21 - Define the required settings as needed (see below)
22 - Call debug_uart_init() before use
23 - Call debug_uart_putc() to output a character
24
25 Depending on your platform it may be possible to use this UART before
26 a stack is available.
27
28 If your UART does not support this interface you can probably add
29 support quite easily. Remember that you cannot use driver model and
30 it is preferred to use no stack.
31
32 You must not use this UART once driver model is working and the
33 serial drivers are up and running (done in serial_init()). Otherwise
34 the drivers may conflict and you will get strange output.
35
Simon Glass27afb522015-01-26 18:27:09 -070036choice
37 prompt "Select which UART will provide the debug UART"
38 depends on DEBUG_UART
39
40config DEBUG_UART_NS16550
41 bool "ns16550"
42 help
43 Select this to enable a debug UART using the ns16550 driver. You
44 will need to provide parameters to make this work. The driver will
45 be available until the real driver model serial is running.
46
47endchoice
48
Simon Glassbac6fd82015-01-26 18:27:07 -070049config DEBUG_UART_BASE
50 hex "Base address of UART"
51 depends on DEBUG_UART
52 help
53 This is the base address of your UART for memory-mapped UARTs.
54
55 A default should be provided by your board, but if not you will need
56 to use the correct value here.
57
58config DEBUG_UART_CLOCK
59 int "UART input clock"
60 depends on DEBUG_UART
61 help
62 The UART input clock determines the speed of the internal UART
63 circuitry. The baud rate is derived from this by dividing the input
64 clock down.
65
66 A default should be provided by your board, but if not you will need
67 to use the correct value here.
68
Simon Glass54111292015-02-27 22:06:25 -070069config DEBUG_UART_SHIFT
70 int "UART register shift"
71 depends on DEBUG_UART
72 default 0 if DEBUG_UART
73 help
74 Some UARTs (notably ns16550) support different register layouts
75 where the registers are spaced either as bytes, words or some other
76 value. Use this value to specify the shift to use, where 0=byte
77 registers, 2=32-bit word registers, etc.
78
Simon Glass8579a512015-03-06 13:19:03 -070079config SANDBOX_SERIAL
80 bool "Sandbox UART support"
81 depends on SANDBOX && DM
82 help
83 Select this to enable a seral UART for sandbox. This is required to
84 operate correctly, otherwise you will see no serial output from
85 sandbox. The emulated UART will display to the console and console
86 input will be fed into the UART. This allows you to interact with
87 U-Boot.
88
89 The operation of the console is controlled by the -t command-line
90 flag. In raw mode, U-Boot sees all characters from the terminal
91 before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
92 is processed by the terminal, and terminates U-Boot. Valid options
93 are:
94
95 -t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot
96 -t raw Raw mode, Ctrl-C is processed by U-Boot
97 -t cooked Cooked mode, Ctrl-C terminates
98
Masahiro Yamada4261c642014-10-23 22:26:11 +090099config UNIPHIER_SERIAL
Masahiro Yamada563ee4c2015-05-29 17:30:01 +0900100 bool "Support for UniPhier on-chip UART"
Masahiro Yamada4261c642014-10-23 22:26:11 +0900101 depends on ARCH_UNIPHIER && DM_SERIAL
102 help
Masahiro Yamada563ee4c2015-05-29 17:30:01 +0900103 If you have a UniPhier based board and want to use the on-chip
104 serial ports, say Y to this option. If unsure, say N.