Sylvain Munaut | 26bc465 | 2020-09-14 10:19:49 +0200 | [diff] [blame] | 1 | /* |
| 2 | * console.c |
| 3 | * |
| 4 | * Copyright (C) 2019-2020 Sylvain Munaut <tnt@246tNt.com> |
| 5 | * SPDX-License-Identifier: LGPL-3.0-or-later |
| 6 | */ |
| 7 | |
| 8 | #include <stdint.h> |
| 9 | |
| 10 | #include "config.h" |
| 11 | #include "mini-printf.h" |
| 12 | |
| 13 | |
| 14 | struct wb_uart { |
| 15 | uint32_t data; |
| 16 | uint32_t clkdiv; |
| 17 | } __attribute__((packed,aligned(4))); |
| 18 | |
| 19 | static volatile struct wb_uart * const uart_regs = (void*)(UART_BASE); |
| 20 | |
| 21 | |
| 22 | static char _printf_buf[128]; |
| 23 | |
| 24 | void console_init(void) |
| 25 | { |
| 26 | #ifdef BOARD_E1_TRACER |
| 27 | uart_regs->clkdiv = 22; /* ~1 Mbaud with clk=24MHz */ |
| 28 | #else |
| 29 | uart_regs->clkdiv = 29; /* ~1 Mbaud with clk=30.72MHz */ |
| 30 | #endif |
| 31 | } |
| 32 | |
| 33 | char getchar(void) |
| 34 | { |
| 35 | int32_t c; |
| 36 | do { |
| 37 | c = uart_regs->data; |
| 38 | } while (c & 0x80000000); |
| 39 | return c; |
| 40 | } |
| 41 | |
| 42 | int getchar_nowait(void) |
| 43 | { |
| 44 | int32_t c; |
| 45 | c = uart_regs->data; |
| 46 | return c & 0x80000000 ? -1 : (c & 0xff); |
| 47 | } |
| 48 | |
| 49 | void putchar(char c) |
| 50 | { |
| 51 | uart_regs->data = c; |
| 52 | } |
| 53 | |
| 54 | void puts(const char *p) |
| 55 | { |
| 56 | char c; |
| 57 | while ((c = *(p++)) != 0x00) { |
| 58 | if (c == '\n') |
| 59 | uart_regs->data = '\r'; |
| 60 | uart_regs->data = c; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | int printf(const char *fmt, ...) |
| 65 | { |
| 66 | va_list va; |
| 67 | int l; |
| 68 | |
| 69 | va_start(va, fmt); |
| 70 | l = mini_vsnprintf(_printf_buf, 128, fmt, va); |
| 71 | va_end(va); |
| 72 | |
| 73 | puts(_printf_buf); |
| 74 | |
| 75 | return l; |
| 76 | } |