/* * based on linux.git/drivers/tty/serial/ar933x_uart.c * * This file is part of barebox. * See file CREDITS for list of people who contributed to this project. * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #ifndef __AR933X_DEBUG_LL__ #define __AR933X_DEBUG_LL__ #include <io.h> #include <linux/bitops.h> #include <asm/addrspace.h> #include <mach/ar71xx_regs.h> #define AR933X_UART_DATA_REG 0x00 #define AR933X_UART_DATA_TX_RX_MASK 0xff #define AR933X_UART_DATA_TX_CSR BIT(9) #define DEBUG_LL_UART_ADDR KSEG1ADDR(AR933X_UART_BASE) static inline void ar933x_debug_ll_writel(u32 b, int offset) { cpu_writel(b, (u8 *)DEBUG_LL_UART_ADDR + offset); } static inline u32 ar933x_debug_ll_readl(int offset) { return cpu_readl((u8 *)DEBUG_LL_UART_ADDR + offset); } static inline void PUTC_LL(int ch) { u32 data; /* wait transmitter ready */ data = ar933x_debug_ll_readl(AR933X_UART_DATA_REG); while (!(data & AR933X_UART_DATA_TX_CSR)) data = ar933x_debug_ll_readl(AR933X_UART_DATA_REG); data = (ch & AR933X_UART_DATA_TX_RX_MASK) | AR933X_UART_DATA_TX_CSR; ar933x_debug_ll_writel(data, AR933X_UART_DATA_REG); } #endif /* __AR933X_DEBUG_LL__ */