/* * Ralink RT305x SoC early printk support * * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. */ #include <linux/io.h> #include <linux/serial_reg.h> #include <asm/addrspace.h> #include <asm/mach-ralink/rt305x_regs.h> #define UART_READ(r) \ __raw_readl((void __iomem *)(KSEG1ADDR(RT305X_UART1_BASE) + 4 * (r))) #define UART_WRITE(r, v) \ __raw_writel((v), (void __iomem *)(KSEG1ADDR(RT305X_UART1_BASE) + 4 * (r))) void prom_putchar(unsigned char ch) { while (((UART_READ(UART_REG_LSR)) & UART_LSR_THRE) == 0); UART_WRITE(UART_REG_TX, ch); while (((UART_READ(UART_REG_LSR)) & UART_LSR_THRE) == 0); }