/* $OpenBSD: scifcons.c,v 1.6 2014/07/17 13:14:06 miod Exp $ */ /* $NetBSD: scifcons.c,v 1.1 2006/09/01 21:26:18 uwe Exp $ */ /* NetBSD: scif.c,v 1.38 2004/12/13 02:14:13 chs Exp */ /*- * Copyright (C) 1999 T.Horiuchi and SAITOH Masanobu. 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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. */ /*- * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 THE FOUNDATION OR CONTRIBUTORS * 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. */ /* * Copyright (c) 1991 The Regents of the University of California. * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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. * * @(#)com.c 7.5 (Berkeley) 5/16/91 */ /* * SH internal serial driver * * This code is derived from both z8530tty.c and com.c */ #include <libsa.h> #include <dev/cons.h> #include <arch/sh/dev/scifreg.h> #define scif_smr_read() SHREG_SCSMR2 #define scif_smr_write(v) (SHREG_SCSMR2 = (v)) #define scif_brr_read() SHREG_SCBRR2 #define scif_brr_write(v) (SHREG_SCBRR2 = (v)) #define scif_scr_read() SHREG_SCSCR2 #define scif_scr_write(v) (SHREG_SCSCR2 = (v)) #define scif_ftdr_write(v) (SHREG_SCFTDR2 = (v)) #define scif_ssr_read() SHREG_SCSSR2 #define scif_ssr_write(v) (SHREG_SCSSR2 = (v)) #define scif_frdr_read() SHREG_SCFRDR2 #define scif_fcr_read() SHREG_SCFCR2 #define scif_fcr_write(v) (SHREG_SCFCR2 = (v)) #define scif_fdr_read() SHREG_SCFDR2 #define scif_sptr_read() SHREG_SCSPTR2 #define scif_sptr_write(v) (SHREG_SCSPTR2 = (v)) #define scif_lsr_read() SHREG_SCLSR2 #define scif_lsr_write(v) (SHREG_SCLSR2 = (v)) #define divrnd(n, q) (((n)*2/(q)+1)/2) /* divide and round off */ #define SERBUFSIZE 16 static u_char serbuf[SERBUFSIZE]; static int serbuf_read = 0; static int serbuf_write = 0; void scif_init(unsigned int bps) { serbuf_read = 0; serbuf_write = 0; /* Initialize SCR */ scif_scr_write(0x00); /* Clear FIFO */ scif_fcr_write(SCFCR2_TFRST | SCFCR2_RFRST); /* Serial Mode Register */ scif_smr_write(0x00); /* 8bit,NonParity,Even,1Stop */ /* Bit Rate Register */ scif_brr_write(divrnd(PCLOCK, 32 * bps) - 1); delay(100); scif_sptr_write(SCSPTR2_RTSIO); scif_fcr_write(FIFO_RCV_TRIGGER_1 | FIFO_XMT_TRIGGER_8); /* Send permission, Receive permission ON */ scif_scr_write(SCSCR2_TE | SCSCR2_RE); /* Serial Status Register */ scif_ssr_write(scif_ssr_read() & SCSSR2_TDFE); /* Clear Status */ } void scif_cnprobe(struct consdev *cn) { cn->cn_pri = CN_HIGHPRI; } void scif_cninit(struct consdev *cn) { scif_init(9600); } int scif_cngetc(dev_t dev) { unsigned char c, err_c; unsigned short err_c2; if (serbuf_read != serbuf_write) { if (dev & 0x80) return 1; c = serbuf[serbuf_read]; serbuf_read = (serbuf_read + 1) % SERBUFSIZE; return (c); } for (;;) { /* wait for ready */ if ((scif_fdr_read() & SCFDR2_RECVCNT) != 0) { c = scif_frdr_read(); err_c = scif_ssr_read(); scif_ssr_write(scif_ssr_read() & ~(SCSSR2_ER | SCSSR2_BRK | SCSSR2_RDF | SCSSR2_DR)); err_c2 = scif_lsr_read(); scif_lsr_write(scif_lsr_read() & ~SCLSR2_ORER); if ((err_c & (SCSSR2_ER | SCSSR2_BRK | SCSSR2_FER | SCSSR2_PER)) == 0) { if ((err_c2 & SCLSR2_ORER) == 0) { if ((dev & 0x80) == 0) return (c); /* stuff char into preread buffer */ serbuf[serbuf_write] = (u_char)c; serbuf_write = (serbuf_write + 1) % SERBUFSIZE; return (1); } } } if (dev & 0x80) return 0; } } void scif_cnputc(dev_t dev, int c) { /* wait for ready */ while ((scif_fdr_read() & SCFDR2_TXCNT) == SCFDR2_TXF_FULL) continue; /* write send data to send register */ scif_ftdr_write(c); /* clear ready flag */ scif_ssr_write(scif_ssr_read() & ~(SCSSR2_TDFE | SCSSR2_TEND)); }
