1 /* $NetBSD: epcom.c,v 1.5 2009/10/23 00:39:30 snj Exp $ */ 2 3 /* 4 * Copyright (c) 2004 Jesse Off 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * This file provides the cons_init() function and console I/O routines 31 * for boards that use the ep93xx ARM SoC UARTs 32 */ 33 34 #include <sys/types.h> 35 #include <arm/ep93xx/epcomreg.h> 36 #include <arm/ep93xx/ep93xxreg.h> 37 #include <lib/libsa/stand.h> 38 39 #include "board.h" 40 41 #define SCADDR (EP93XX_APB_HWBASE + EP93XX_APB_SYSCON) 42 #define EPCOM_READ(x) *((volatile uint32_t *) (CONADDR + (EPCOM_ ## x))) 43 #define EPCOM_WRITE(x, v) *((volatile uint32_t *) \ 44 (CONADDR + (EPCOM_ ## x))) = (v) 45 #define SYSCON_READ(x) *((volatile uint32_t *) \ 46 (SCADDR + (EP93XX_SYSCON_ ## x))) 47 #define SYSCON_WRITE(x, v) *((volatile uint32_t *) \ 48 (SCADDR + (EP93XX_SYSCON_ ## x))) = (v) 49 50 #define ISSET(t,f) ((t) & (f)) 51 52 void 53 cons_init(void) 54 { 55 unsigned long baud, pwrcnt; 56 57 while(!ISSET(EPCOM_READ(Flag), Flag_TXFE)); 58 59 /* Make UART base freq 7 MHz */ 60 pwrcnt = SYSCON_READ(PwrCnt); 61 pwrcnt &= ~(PwrCnt_UARTBAUD); 62 SYSCON_WRITE(PwrCnt, pwrcnt); 63 64 baud = EPCOMSPEED2BRD(CONSPEED); 65 EPCOM_WRITE(LinCtrlLow, baud & 0xff); 66 EPCOM_WRITE(LinCtrlMid, baud >> 8); 67 EPCOM_WRITE(LinCtrlHigh, LinCtrlHigh_FEN|LinCtrlHigh_WLEN); 68 } 69 70 int 71 getchar(void) 72 { 73 while(!ISSET(EPCOM_READ(Flag), Flag_RXFE)); 74 return (EPCOM_READ(Data) & 0xff); 75 } 76 77 void 78 putchar(int c) 79 { 80 while(ISSET(EPCOM_READ(Flag), Flag_TXFF)); 81 82 if (c == '\n') { 83 while(!ISSET(EPCOM_READ(Flag), Flag_TXFE)); 84 EPCOM_WRITE(Data, '\r'); 85 } 86 87 EPCOM_WRITE(Data, c); 88 } 89