Annotation of sys/arch/landisk/stand/boot/scifcons.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: scifcons.c,v 1.2 2006/10/10 05:26:54 miod Exp $ */
! 2: /* $NetBSD: scifcons.c,v 1.1 2006/09/01 21:26:18 uwe Exp $ */
! 3: /* NetBSD: scif.c,v 1.38 2004/12/13 02:14:13 chs Exp */
! 4:
! 5: /*-
! 6: * Copyright (C) 1999 T.Horiuchi and SAITOH Masanobu. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. The name of the author may not be used to endorse or promote products
! 17: * derived from this software without specific prior written permission.
! 18: *
! 19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 20: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 21: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 22: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 23: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 24: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
! 28: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 29: */
! 30: /*-
! 31: * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
! 32: * All rights reserved.
! 33: *
! 34: * This code is derived from software contributed to The NetBSD Foundation
! 35: * by Charles M. Hannum.
! 36: *
! 37: * Redistribution and use in source and binary forms, with or without
! 38: * modification, are permitted provided that the following conditions
! 39: * are met:
! 40: * 1. Redistributions of source code must retain the above copyright
! 41: * notice, this list of conditions and the following disclaimer.
! 42: * 2. Redistributions in binary form must reproduce the above copyright
! 43: * notice, this list of conditions and the following disclaimer in the
! 44: * documentation and/or other materials provided with the distribution.
! 45: * 3. All advertising materials mentioning features or use of this software
! 46: * must display the following acknowledgement:
! 47: * This product includes software developed by the NetBSD
! 48: * Foundation, Inc. and its contributors.
! 49: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 50: * contributors may be used to endorse or promote products derived
! 51: * from this software without specific prior written permission.
! 52: *
! 53: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 54: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 55: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 56: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 57: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 58: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 59: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 60: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 61: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 62: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 63: * POSSIBILITY OF SUCH DAMAGE.
! 64: */
! 65: /*
! 66: * Copyright (c) 1991 The Regents of the University of California.
! 67: * All rights reserved.
! 68: *
! 69: * Redistribution and use in source and binary forms, with or without
! 70: * modification, are permitted provided that the following conditions
! 71: * are met:
! 72: * 1. Redistributions of source code must retain the above copyright
! 73: * notice, this list of conditions and the following disclaimer.
! 74: * 2. Redistributions in binary form must reproduce the above copyright
! 75: * notice, this list of conditions and the following disclaimer in the
! 76: * documentation and/or other materials provided with the distribution.
! 77: * 3. Neither the name of the University nor the names of its contributors
! 78: * may be used to endorse or promote products derived from this software
! 79: * without specific prior written permission.
! 80: *
! 81: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 82: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 83: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 84: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 85: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 86: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 87: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 88: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 89: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 90: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 91: * SUCH DAMAGE.
! 92: *
! 93: * @(#)com.c 7.5 (Berkeley) 5/16/91
! 94: */
! 95: /*
! 96: * SH internal serial driver
! 97: *
! 98: * This code is derived from both z8530tty.c and com.c
! 99: */
! 100:
! 101: #include <libsa.h>
! 102:
! 103: #include <arch/sh/dev/scifreg.h>
! 104:
! 105: #define scif_smr_read() SHREG_SCSMR2
! 106: #define scif_smr_write(v) (SHREG_SCSMR2 = (v))
! 107:
! 108: #define scif_brr_read() SHREG_SCBRR2
! 109: #define scif_brr_write(v) (SHREG_SCBRR2 = (v))
! 110:
! 111: #define scif_scr_read() SHREG_SCSCR2
! 112: #define scif_scr_write(v) (SHREG_SCSCR2 = (v))
! 113:
! 114: #define scif_ftdr_write(v) (SHREG_SCFTDR2 = (v))
! 115:
! 116: #define scif_ssr_read() SHREG_SCSSR2
! 117: #define scif_ssr_write(v) (SHREG_SCSSR2 = (v))
! 118:
! 119: #define scif_frdr_read() SHREG_SCFRDR2
! 120:
! 121: #define scif_fcr_read() SHREG_SCFCR2
! 122: #define scif_fcr_write(v) (SHREG_SCFCR2 = (v))
! 123:
! 124: #define scif_fdr_read() SHREG_SCFDR2
! 125:
! 126: #define scif_sptr_read() SHREG_SCSPTR2
! 127: #define scif_sptr_write(v) (SHREG_SCSPTR2 = (v))
! 128:
! 129: #define scif_lsr_read() SHREG_SCLSR2
! 130: #define scif_lsr_write(v) (SHREG_SCLSR2 = (v))
! 131:
! 132: #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */
! 133:
! 134: #define SERBUFSIZE 16
! 135: static u_char serbuf[SERBUFSIZE];
! 136: static int serbuf_read = 0;
! 137: static int serbuf_write = 0;
! 138:
! 139: void
! 140: scif_init(unsigned int bps)
! 141: {
! 142:
! 143: serbuf_read = 0;
! 144: serbuf_write = 0;
! 145:
! 146: /* Initialize SCR */
! 147: scif_scr_write(0x00);
! 148:
! 149: /* Clear FIFO */
! 150: scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST);
! 151:
! 152: /* Serial Mode Register */
! 153: scif_smr_write(0x00); /* 8bit,NonParity,Even,1Stop */
! 154:
! 155: /* Bit Rate Register */
! 156: scif_brr_write(divrnd(PCLOCK, 32 * bps) - 1);
! 157:
! 158: delay(100);
! 159:
! 160: scif_sptr_write(SCSPTR2_RTSIO);
! 161:
! 162: scif_fcr_write(FIFO_RCV_TRIGGER_1 | FIFO_XMT_TRIGGER_8);
! 163:
! 164: /* Send permission, Receive permission ON */
! 165: scif_scr_write(SCSCR2_TE | SCSCR2_RE);
! 166:
! 167: /* Serial Status Register */
! 168: scif_ssr_write(scif_ssr_read() & SCSSR2_TDFE); /* Clear Status */
! 169: }
! 170:
! 171: int
! 172: scif_getc(void)
! 173: {
! 174: unsigned char c, err_c;
! 175: unsigned short err_c2;
! 176:
! 177: if (serbuf_read != serbuf_write) {
! 178: c = serbuf[serbuf_read];
! 179: serbuf_read = (serbuf_read + 1) % SERBUFSIZE;
! 180: return (c);
! 181: }
! 182:
! 183: for (;;) {
! 184: /* wait for ready */
! 185: while ((scif_fdr_read() & SCFDR2_RECVCNT) == 0)
! 186: continue;
! 187:
! 188: c = scif_frdr_read();
! 189: err_c = scif_ssr_read();
! 190: scif_ssr_write(scif_ssr_read()
! 191: & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_RDF | SCSSR2_DR));
! 192:
! 193: err_c2 = scif_lsr_read();
! 194: scif_lsr_write(scif_lsr_read() & ~SCLSR2_ORER);
! 195:
! 196: if ((err_c & (SCSSR2_ER | SCSSR2_BRK | SCSSR2_FER
! 197: | SCSSR2_PER)) == 0) {
! 198: if ((err_c2 & SCLSR2_ORER) == 0) {
! 199: return (c);
! 200: }
! 201: }
! 202: }
! 203: }
! 204:
! 205: void
! 206: scif_putc(int c)
! 207: {
! 208:
! 209: /* wait for ready */
! 210: while ((scif_fdr_read() & SCFDR2_TXCNT) == SCFDR2_TXF_FULL)
! 211: continue;
! 212:
! 213: /* write send data to send register */
! 214: scif_ftdr_write(c);
! 215:
! 216: /* clear ready flag */
! 217: scif_ssr_write(scif_ssr_read() & ~(SCSSR2_TDFE | SCSSR2_TEND));
! 218: }
! 219:
! 220: int
! 221: cnischar(void)
! 222: {
! 223: unsigned char c, err_c;
! 224: unsigned short err_c2;
! 225:
! 226: /* check if any preread input is already there */
! 227: if (serbuf_read != serbuf_write)
! 228: return (1);
! 229:
! 230: if (scif_fdr_read() & SCFDR2_RECVCNT) {
! 231: c = scif_frdr_read();
! 232: err_c = scif_ssr_read();
! 233: scif_ssr_write(scif_ssr_read()
! 234: & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_RDF | SCSSR2_DR));
! 235:
! 236: err_c2 = scif_lsr_read();
! 237: scif_lsr_write(scif_lsr_read() & ~SCLSR2_ORER);
! 238:
! 239: if ((err_c & (SCSSR2_ER | SCSSR2_BRK | SCSSR2_FER
! 240: | SCSSR2_PER)) == 0) {
! 241: if ((err_c2 & SCLSR2_ORER) == 0) {
! 242: /* stuff char into preread buffer */
! 243: serbuf[serbuf_write] = (u_char)c;
! 244: serbuf_write = (serbuf_write + 1) % SERBUFSIZE;
! 245: return (1);
! 246: }
! 247: }
! 248: }
! 249: return (0); /* nothing out there... */
! 250: }
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