1 /* $NetBSD: epcom.c,v 1.3 2005/12/24 20:07:03 perry 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project by 18 * Wasabi Systems, Inc. 19 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 20 * or promote products derived from this software without specific prior 21 * written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * This file provides the cons_init() function and console I/O routines 38 * for boards that use the ep93xx ARM SoC UARTs 39 */ 40 41 #include <sys/types.h> 42 #include <arm/ep93xx/epcomreg.h> 43 #include <arm/ep93xx/ep93xxreg.h> 44 #include <lib/libsa/stand.h> 45 46 #include "board.h" 47 48 #define SCADDR (EP93XX_APB_HWBASE + EP93XX_APB_SYSCON) 49 #define EPCOM_READ(x) *((volatile uint32_t *) (CONADDR + (EPCOM_ ## x))) 50 #define EPCOM_WRITE(x, v) *((volatile uint32_t *) \ 51 (CONADDR + (EPCOM_ ## x))) = (v) 52 #define SYSCON_READ(x) *((volatile uint32_t *) \ 53 (SCADDR + (EP93XX_SYSCON_ ## x))) 54 #define SYSCON_WRITE(x, v) *((volatile uint32_t *) \ 55 (SCADDR + (EP93XX_SYSCON_ ## x))) = (v) 56 57 #define ISSET(t,f) ((t) & (f)) 58 59 void 60 cons_init(void) 61 { 62 unsigned long baud, pwrcnt; 63 64 while(!ISSET(EPCOM_READ(Flag), Flag_TXFE)); 65 66 /* Make UART base freq 7Mhz */ 67 pwrcnt = SYSCON_READ(PwrCnt); 68 pwrcnt &= ~(PwrCnt_UARTBAUD); 69 SYSCON_WRITE(PwrCnt, pwrcnt); 70 71 baud = EPCOMSPEED2BRD(CONSPEED); 72 EPCOM_WRITE(LinCtrlLow, baud & 0xff); 73 EPCOM_WRITE(LinCtrlMid, baud >> 8); 74 EPCOM_WRITE(LinCtrlHigh, LinCtrlHigh_FEN|LinCtrlHigh_WLEN); 75 } 76 77 int 78 getchar(void) 79 { 80 while(!ISSET(EPCOM_READ(Flag), Flag_RXFE)); 81 return (EPCOM_READ(Data) & 0xff); 82 } 83 84 void 85 putchar(int c) 86 { 87 while(ISSET(EPCOM_READ(Flag), Flag_TXFF)); 88 89 if (c == '\n') { 90 while(!ISSET(EPCOM_READ(Flag), Flag_TXFE)); 91 EPCOM_WRITE(Data, '\r'); 92 } 93 94 EPCOM_WRITE(Data, c); 95 } 96