| Maxime Bizon | e7300d0 | 2009-08-18 13:23:37 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/init.h> |
| 10 | #include <bcm63xx_io.h> |
| 11 | #include <bcm63xx_regs.h> |
| 12 | |
| Aaro Koskinen | f7be4e7 | 2013-02-11 20:51:49 +0000 | [diff] [blame] | 13 | static void wait_xfered(void) |
| Maxime Bizon | e7300d0 | 2009-08-18 13:23:37 +0100 | [diff] [blame] | 14 | { |
| 15 | unsigned int val; |
| 16 | |
| 17 | /* wait for any previous char to be transmitted */ |
| 18 | do { |
| 19 | val = bcm_uart0_readl(UART_IR_REG); |
| 20 | if (val & UART_IR_STAT(UART_IR_TXEMPTY)) |
| 21 | break; |
| 22 | } while (1); |
| 23 | } |
| 24 | |
| Aaro Koskinen | f7be4e7 | 2013-02-11 20:51:49 +0000 | [diff] [blame] | 25 | void prom_putchar(char c) |
| Maxime Bizon | e7300d0 | 2009-08-18 13:23:37 +0100 | [diff] [blame] | 26 | { |
| 27 | wait_xfered(); |
| 28 | bcm_uart0_writel(c, UART_FIFO_REG); |
| 29 | wait_xfered(); |
| 30 | } |