[src/trunk]: src/sys/arch/evbarm/stand/board On-chip EP93xx UART support

[joff <joff%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c6db7dc95030
branches:  trunk
changeset: 572204:c6db7dc95030
user:      joff <joff%NetBSD.org@localhost>
date:      Fri Dec 24 10:34:27 2004 +0000

description:
On-chip EP93xx UART support

diffstat:

 sys/arch/evbarm/stand/board/epcom.c |  95 +++++++++++++++++++++++++++++++++++++
 1 files changed, 95 insertions(+), 0 deletions(-)

diffs (99 lines):

diff -r d0c8de3c73f7 -r c6db7dc95030 sys/arch/evbarm/stand/board/epcom.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/evbarm/stand/board/epcom.c       Fri Dec 24 10:34:27 2004 +0000
@@ -0,0 +1,95 @@
+/*     $NetBSD: epcom.c,v 1.1 2004/12/24 10:34:27 joff Exp $   */
+
+/*
+ * Copyright (c) 2004 Jesse Off
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed for the NetBSD Project by
+ *     Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* 
+ * This file provides the cons_init() function and console I/O routines
+ * for boards that use the ep93xx ARM SoC UARTs
+ */
+
+#include <sys/types.h>
+#include <arm/ep93xx/epcomreg.h>
+#include <arm/ep93xx/ep93xxreg.h>
+#include <lib/libsa/stand.h>
+
+#include "board.h"
+
+#define SCADDR (EP93XX_APB_HWBASE + EP93XX_APB_SYSCON)
+#define        EPCOM_READ(x)           *((__volatile uint32_t *) (CONADDR + (EPCOM_ ## x)))
+#define        EPCOM_WRITE(x, v)       *((__volatile uint32_t *) \
+                                       (CONADDR + (EPCOM_ ## x))) = (v)
+#define        SYSCON_READ(x)          *((__volatile uint32_t *) \
+                                       (SCADDR + (EP93XX_SYSCON_ ## x)))
+#define        SYSCON_WRITE(x, v)      *((__volatile uint32_t *) \
+                                       (SCADDR + (EP93XX_SYSCON_ ## x))) = (v)
+
+#define        ISSET(t,f)      ((t) & (f))
+
+void
+cons_init(void)
+{
+       unsigned long baud, pwrcnt;
+
+       while(!ISSET(EPCOM_READ(Flag), Flag_TXFE));
+
+       /* Make UART base freq 7Mhz */
+       pwrcnt = SYSCON_READ(PwrCnt);
+       pwrcnt &= ~(PwrCnt_UARTBAUD);
+       SYSCON_WRITE(PwrCnt, pwrcnt);
+
+       baud = EPCOMSPEED2BRD(CONSPEED);
+       EPCOM_WRITE(LinCtrlLow, baud & 0xff);
+       EPCOM_WRITE(LinCtrlMid, baud >> 8);
+       EPCOM_WRITE(LinCtrlHigh, LinCtrlHigh_FEN|LinCtrlHigh_WLEN);
+}
+
+int
+getchar(void)
+{
+       while(!ISSET(EPCOM_READ(Flag), Flag_RXFE));
+       return (EPCOM_READ(Data) & 0xff);
+}
+
+void
+putchar(int c)
+{
+       while(ISSET(EPCOM_READ(Flag), Flag_TXFF));
+
+       if (c == '\n') {
+               while(!ISSET(EPCOM_READ(Flag), Flag_TXFE));
+               EPCOM_WRITE(Data, '\r');
+       } 
+
+       EPCOM_WRITE(Data, c);
+}