/* * Copyright (C) 2012 Antony Pavlov <antonynpavlov@gmail.com> * * 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. * */ #include <common.h> #include <types.h> #include <driver.h> #include <init.h> #include <ns16550.h> #include <mach/jz4750d_regs.h> #include <io.h> #include <asm/common.h> #define JZ4750D_UART_SHIFT 2 #define ier (1 << JZ4750D_UART_SHIFT) #define fcr (2 << JZ4750D_UART_SHIFT) static void jz4750d_serial_reg_write(unsigned int val, unsigned long base, unsigned char reg_offset) { switch (reg_offset) { case fcr: val |= 0x10; /* Enable uart module */ break; case ier: val |= (val & 0x4) << 2; break; default: break; } writeb(val & 0xff, (void *)(base + reg_offset)); } static struct NS16550_plat serial_plat = { .clock = 12000000, .shift = JZ4750D_UART_SHIFT, .reg_write = &jz4750d_serial_reg_write, }; static int rzx50_console_init(void) { /* Register the serial port */ add_ns16550_device(DEVICE_ID_DYNAMIC, UART1_BASE, 8 << JZ4750D_UART_SHIFT, IORESOURCE_MEM_8BIT, &serial_plat); return 0; } console_initcall(rzx50_console_init);