blob: fd126a825f29b8abedfb70de752a327e1bf516cb [file] [log] [blame]
Masahiro Yamadada333ae2014-10-23 22:26:09 +09001config DM_SERIAL
2 bool "Enable Driver Model for serial drivers"
3 depends on DM
4 help
Simon Glassf94a1be2015-02-05 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 Yamadaff247b72014-10-23 22:26:11 +09009
Simon Glass2f964aa2015-01-26 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 Glass21d00432015-01-26 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
Simon Glass275854b2015-08-04 12:33:40 -060047config DEBUG_EFI_CONSOLE
48 bool "EFI"
49 depends on EFI_APP
50 help
51 Select this to enable a debug console which calls back to EFI to
52 output to the console. This can be useful for early debugging of
53 U-Boot when running on top of EFI (Extensive Firmware Interface).
54 This is a type of BIOS used by PCs.
55
Simon Glassbf6e7022015-07-02 18:15:54 -060056config DEBUG_UART_S5P
57 bool "Samsung S5P"
58 help
59 Select this to enable a debug UART using the serial_s5p driver. You
60 will need to provide parameters to make this work. The driver will
61 be available until the real driver-model serial is running.
62
Simon Glass21d00432015-01-26 18:27:09 -070063endchoice
64
Simon Glass2f964aa2015-01-26 18:27:07 -070065config DEBUG_UART_BASE
66 hex "Base address of UART"
67 depends on DEBUG_UART
68 help
69 This is the base address of your UART for memory-mapped UARTs.
70
71 A default should be provided by your board, but if not you will need
72 to use the correct value here.
73
74config DEBUG_UART_CLOCK
75 int "UART input clock"
76 depends on DEBUG_UART
77 help
78 The UART input clock determines the speed of the internal UART
79 circuitry. The baud rate is derived from this by dividing the input
80 clock down.
81
82 A default should be provided by your board, but if not you will need
83 to use the correct value here.
84
Simon Glassdd0b0122015-02-27 22:06:25 -070085config DEBUG_UART_SHIFT
86 int "UART register shift"
87 depends on DEBUG_UART
88 default 0 if DEBUG_UART
89 help
90 Some UARTs (notably ns16550) support different register layouts
91 where the registers are spaced either as bytes, words or some other
92 value. Use this value to specify the shift to use, where 0=byte
93 registers, 2=32-bit word registers, etc.
94
Simon Glassaf282242015-03-06 13:19:03 -070095config SANDBOX_SERIAL
96 bool "Sandbox UART support"
97 depends on SANDBOX && DM
98 help
99 Select this to enable a seral UART for sandbox. This is required to
100 operate correctly, otherwise you will see no serial output from
101 sandbox. The emulated UART will display to the console and console
102 input will be fed into the UART. This allows you to interact with
103 U-Boot.
104
105 The operation of the console is controlled by the -t command-line
106 flag. In raw mode, U-Boot sees all characters from the terminal
107 before they are processed, including Ctrl-C. In cooked mode, Ctrl-C
108 is processed by the terminal, and terminates U-Boot. Valid options
109 are:
110
111 -t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot
112 -t raw Raw mode, Ctrl-C is processed by U-Boot
113 -t cooked Cooked mode, Ctrl-C terminates
114
Masahiro Yamadaff247b72014-10-23 22:26:11 +0900115config UNIPHIER_SERIAL
Masahiro Yamadab6ef3a32015-05-29 17:30:01 +0900116 bool "Support for UniPhier on-chip UART"
Masahiro Yamadaff247b72014-10-23 22:26:11 +0900117 depends on ARCH_UNIPHIER && DM_SERIAL
118 help
Masahiro Yamadab6ef3a32015-05-29 17:30:01 +0900119 If you have a UniPhier based board and want to use the on-chip
120 serial ports, say Y to this option. If unsure, say N.
Simon Glassdcfe4a52015-07-27 15:47:23 -0600121
122config X86_SERIAL
123 bool "Support for 16550 serial port on x86 machines"
124 depends on X86
125 default y
126 help
127 Most x86 machines have a ns16550 UART or compatible. This can be
128 enabled in the device tree with the correct input clock frequency
129 provided (default 1843200). Enable this to obtain serial console
130 output.