/* * Copyright (C) 2011 * Author: Jan Weitzel <j.weitzel@phytec.de> * based on arch/arm/mach-versatile/include/mach/debug_ll.h * * barebox is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * barebox 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 __MACH_DEBUG_LL_H__ #define __MACH_DEBUG_LL_H__ #include <io.h> #ifdef CONFIG_ARCH_OMAP3 #include <mach/omap3-silicon.h> #ifdef CONFIG_OMAP_UART1 #define UART_BASE OMAP3_UART1_BASE #else #define UART_BASE OMAP3_UART3_BASE #endif #endif #ifdef CONFIG_ARCH_OMAP4 #include <mach/omap4-silicon.h> #ifdef CONFIG_OMAP_UART1 #define UART_BASE OMAP44XX_UART1_BASE #else #define UART_BASE OMAP44XX_UART3_BASE #endif #endif #ifdef CONFIG_ARCH_AM33XX #include <mach/am33xx-silicon.h> #define UART_BASE AM33XX_UART0_BASE #endif #define LSR_THRE 0x20 /* Xmit holding register empty */ #define LCR_BKSE 0x80 /* Bank select enable */ #define LSR (5 << 2) #define THR (0 << 2) #define DLL (0 << 2) #define IER (1 << 2) #define DLM (1 << 2) #define FCR (2 << 2) #define LCR (3 << 2) #define MCR (4 << 2) #define MDR (8 << 2) static inline void omap_uart_lowlevel_init(void) { writeb(0x00, UART_BASE + LCR); writeb(0x00, UART_BASE + IER); writeb(0x07, UART_BASE + MDR); writeb(LCR_BKSE, UART_BASE + LCR); writeb(26, UART_BASE + DLL); /* 115200 */ writeb(0, UART_BASE + DLM); writeb(0x03, UART_BASE + LCR); writeb(0x03, UART_BASE + MCR); writeb(0x07, UART_BASE + FCR); writeb(0x00, UART_BASE + MDR); } static inline void PUTC_LL(char c) { /* Wait until there is space in the FIFO */ while ((readb(UART_BASE + LSR) & LSR_THRE) == 0); /* Send the character */ writeb(c, UART_BASE + THR); /* Wait to make sure it hits the line, in case we die too soon. */ while ((readb(UART_BASE + LSR) & LSR_THRE) == 0); } #endif