Masahiro Yamada | da333ae | 2014-10-23 22:26:09 +0900 | [diff] [blame] | 1 | config DM_SERIAL |
| 2 | bool "Enable Driver Model for serial drivers" |
| 3 | depends on DM |
| 4 | help |
Simon Glass | f94a1be | 2015-02-05 21:41:35 -0700 | [diff] [blame] | 5 | 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 Yamada | ff247b7 | 2014-10-23 22:26:11 +0900 | [diff] [blame] | 9 | |
Simon Glass | 2f964aa | 2015-01-26 18:27:07 -0700 | [diff] [blame] | 10 | config 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 Glass | 21d0043 | 2015-01-26 18:27:09 -0700 | [diff] [blame] | 36 | choice |
| 37 | prompt "Select which UART will provide the debug UART" |
| 38 | depends on DEBUG_UART |
| 39 | |
| 40 | config 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 Glass | 275854b | 2015-08-04 12:33:40 -0600 | [diff] [blame] | 47 | config 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 Glass | bf6e702 | 2015-07-02 18:15:54 -0600 | [diff] [blame^] | 56 | config 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 Glass | 21d0043 | 2015-01-26 18:27:09 -0700 | [diff] [blame] | 63 | endchoice |
| 64 | |
Simon Glass | 2f964aa | 2015-01-26 18:27:07 -0700 | [diff] [blame] | 65 | config 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 | |
| 74 | config 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 Glass | dd0b012 | 2015-02-27 22:06:25 -0700 | [diff] [blame] | 85 | config 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 Glass | af28224 | 2015-03-06 13:19:03 -0700 | [diff] [blame] | 95 | config 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 Yamada | ff247b7 | 2014-10-23 22:26:11 +0900 | [diff] [blame] | 115 | config UNIPHIER_SERIAL |
Masahiro Yamada | b6ef3a3 | 2015-05-29 17:30:01 +0900 | [diff] [blame] | 116 | bool "Support for UniPhier on-chip UART" |
Masahiro Yamada | ff247b7 | 2014-10-23 22:26:11 +0900 | [diff] [blame] | 117 | depends on ARCH_UNIPHIER && DM_SERIAL |
| 118 | help |
Masahiro Yamada | b6ef3a3 | 2015-05-29 17:30:01 +0900 | [diff] [blame] | 119 | 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 Glass | dcfe4a5 | 2015-07-27 15:47:23 -0600 | [diff] [blame] | 121 | |
| 122 | config 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. |