/* * 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> #include <mach/omap3-silicon.h> #include <mach/omap4-silicon.h> #include <mach/am33xx-silicon.h> #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 __iomem *base) { writeb(0x00, base + LCR); writeb(0x00, base + IER); writeb(0x07, base + MDR); writeb(LCR_BKSE, base + LCR); writeb(26, base + DLL); /* 115200 */ writeb(0, base + DLM); writeb(0x03, base + LCR); writeb(0x03, base + MCR); writeb(0x07, base + FCR); writeb(0x00, base + MDR); } #ifdef CONFIG_DEBUG_LL #ifdef CONFIG_DEBUG_OMAP3_UART #define OMAP_DEBUG_SOC OMAP3 #elif defined CONFIG_DEBUG_OMAP4_UART #define OMAP_DEBUG_SOC OMAP44XX #elif defined CONFIG_DEBUG_AM33XX_UART #define OMAP_DEBUG_SOC AM33XX #else #error "unknown OMAP debug uart soc type" #endif #define __OMAP_UART_BASE(soc, num) soc##_UART##num##_BASE #define OMAP_UART_BASE(soc, num) __OMAP_UART_BASE(soc, num) static inline void PUTC_LL(char c) { void __iomem *base = (void *)OMAP_UART_BASE(OMAP_DEBUG_SOC, CONFIG_DEBUG_OMAP_UART_PORT); /* Wait until there is space in the FIFO */ while ((readb(base + LSR) & LSR_THRE) == 0); /* Send the character */ writeb(c, base + THR); /* Wait to make sure it hits the line, in case we die too soon. */ while ((readb(base + LSR) & LSR_THRE) == 0); } #endif #endif