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527 lines
14 KiB
C
527 lines
14 KiB
C
/*
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* Copyright (c) 1992, 1993, 1996
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* Berkeley Software Design, Inc. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley Software
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* Design, Inc. by Mark Linoman.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Berkeley Software
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* Design, Inc.
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*
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* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* BSDI int14.c,v 2.2 1996/04/08 19:32:45 bostic Exp
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*
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* $FreeBSD$
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*/
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <termios.h>
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#include <unistd.h>
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#include "doscmd.h"
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#include "com.h"
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struct com_data_struct com_data[N_COMS_MAX];
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/* XXX where does struct queue come from? */
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static struct queue *create_queue(unsigned char);
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static int queue_not_empty(struct queue *);
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static int reset_irq_request(unsigned char);
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static int set_irq_request(unsigned char);
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static int test_irq_request(unsigned char);
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static int write_div_latches(struct com_data_struct *);
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static struct queue *
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create_queue(unsigned char irq) { return NULL; }
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static int
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queue_not_empty(struct queue *qp) {return 0;}
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static int
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reset_irq_request(unsigned char irq) {return 0;}
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static int
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set_irq_request(unsigned char irq) {return 0;}
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static int
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test_irq_request(unsigned char irq) {return 0;}
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static int
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write_div_latches(struct com_data_struct *cdsp) {return 0;}
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void
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int14(regcontext_t *REGS)
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{
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struct com_data_struct *cdsp;
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int nbytes;
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char c;
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debug (D_PORT, "int14: dl = 0x%02X, al = 0x%02X.\n", R_DL, R_AL);
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if (R_DL >= N_COMS_MAX) {
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if (vflag)
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dump_regs(REGS);
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fatal ("int14: illegal com port COM%d", R_DL + 1);
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}
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cdsp = &(com_data[R_DL]);
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switch (R_AH) {
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case 0x00: /* Initialize Serial Port */
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#if 0 /* hold off: try to defeat stupid DOS defaults */
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com_set_line(cdsp, R_DL + 1, R_AL);
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R_AH = LS_X_SHFT_E | LS_X_HOLD_E;
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R_AL = 0;
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#endif 0
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break;
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case 0x01: /* Write Character */
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errno = 0;
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c = R_AL;
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nbytes = write(cdsp->fd, &c, 1);
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debug (D_PORT, "write of 0x%02x to fd %d on '%s' returned %d %s\n",
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R_AL, cdsp->fd, cdsp->path, nbytes, strerror(errno));
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if (nbytes == 1) {
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R_AH = LS_X_SHFT_E | LS_X_HOLD_E;
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R_AL = 0;
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} else {
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debug(D_PORT, "int14: lost output character 0x%02x\n",
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R_AL);
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R_AH = LS_SW_TIME_OUT;
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R_AL = 0;
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}
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break;
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case 0x02: /* Read Character */
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errno = 0;
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nbytes = read(cdsp->fd, &c, 1);
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debug (D_PORT, "read of fd %d on '%s' returned %d byte 0x%02x %s\n",
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cdsp->fd, cdsp->path, nbytes, c,
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errno ? strerror(errno) : "");
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if (nbytes == 1) {
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R_AH = LS_X_SHFT_E | LS_X_HOLD_E;
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R_AL = c;
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} else {
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R_AH = LS_SW_TIME_OUT;
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R_AL = 0x60;
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}
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break;
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case 0x03: /* Status Request */
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R_AX = (LS_X_SHFT_E | LS_X_HOLD_E) << 8;
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break;
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case 0x04: /* Extended Initialization */
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R_AX = (LS_SW_TIME_OUT) << 8;
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break;
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case 0x05: /* Modem Control Register operations */
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switch (R_AH) {
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case 0x00: /* Read Modem Control Register */
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R_AX = (LS_SW_TIME_OUT) << 8;
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break;
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case 0x01: /* Write Modem Control Register */
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R_AX = (LS_SW_TIME_OUT) << 8;
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break;
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default:
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unknown_int3(0x14, 0x05, R_AL, REGS);
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break;
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}
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break;
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default:
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unknown_int2(0x14, R_AH, REGS);
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break;
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}
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}
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/* called when doscmd initializes a single line */
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void
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com_set_line(struct com_data_struct *cdsp, unsigned char port, unsigned char param)
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{
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struct stat stat_buf;
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int reg_num;
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debug (D_PORT, "com_set_line: cdsp = %8p, port = 0x%04x,"
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"param = 0x%04X.\n", cdsp, port, param);
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if (cdsp->fd > 0) {
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debug (D_PORT, "Re-initialize serial port com%d\n", port);
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(void)close(cdsp->fd);
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} else {
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debug (D_PORT, "Initialize serial port com%d\n", port);
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}
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stat(cdsp->path, &stat_buf);
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if (!S_ISCHR(stat_buf.st_mode) ||
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((cdsp->fd = open(cdsp->path, O_RDWR | O_NONBLOCK, 0666)) == -1)) {
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debug (D_PORT,
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"Could not initialize serial port com%d on path '%s'\n",
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port, cdsp->path);
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return;
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}
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cdsp->flags = 0x00;
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cdsp->last_char_read = 0x00;
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#if 0
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if ((param & PARITY_EVEN) == PARITY_NONE)
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tty.c_iflag = IGNBRK | IGNPAR | IXON | IXOFF /* | IXANY */;
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else
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tty.c_iflag = IGNBRK | IXON | IXOFF /* | IXANY */;
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tty.c_oflag = 0;
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tty.c_lflag = 0;
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tty.c_cc[VTIME] = 0;
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tty.c_cc[VMIN] = 1;
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tty.c_cflag = CREAD | CLOCAL | HUPCL;
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/* MCL WHY CLOCAL ??????; but, gets errno EIO on writes, else */
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if ((param & TXLEN_8BITS) == TXLEN_8BITS)
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tty.c_cflag |= CS8;
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else
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tty.c_cflag |= CS7;
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if ((param & STOPBIT_2) == STOPBIT_2)
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tty.c_cflag |= CSTOPB;
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switch (param & PARITY_EVEN) {
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case (PARITY_ODD):
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tty.c_cflag |= (PARENB | PARODD);
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break;
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case (PARITY_EVEN):
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tty.c_cflag |= PARENB;
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break;
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case (PARITY_NONE):
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default:
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break;
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}
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switch (param & BITRATE_9600) {
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case (BITRATE_110):
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speed = B110;
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break;
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case (BITRATE_150):
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speed = B150;
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break;
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case (BITRATE_300):
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speed = B300;
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break;
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case (BITRATE_600):
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speed = B600;
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break;
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case (BITRATE_1200):
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speed = B1200;
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break;
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case (BITRATE_2400):
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speed = B2400;
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break;
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case (BITRATE_4800):
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speed = B4800;
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break;
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case (BITRATE_9600):
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speed = B9600;
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break;
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}
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debug (D_PORT, "com_set_line: going with cflag 0x%X iflag 0x%X speed %d.\n",
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tty.c_cflag, tty.c_iflag, speed);
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errno = 0;
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ret_val = cfsetispeed(&tty, speed);
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debug (D_PORT, "com_set_line: cfsetispeed returned 0x%X.\n", ret_val);
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errno = 0;
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ret_val = cfsetospeed(&tty, speed);
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debug (D_PORT, "com_set_line: cfsetospeed returned 0x%X.\n", ret_val);
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errno = 0;
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ret_val = tcsetattr(cdsp->fd, 0, &tty);
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debug (D_PORT, "com_set_line: tcsetattr returned 0x%X.\n", ret_val);
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errno = 0;
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ret_val = fcntl(cdsp->fd, F_SETFL, O_NDELAY);
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debug (D_PORT, "fcntl of 0x%X, 0x%X to fd %d returned %d errno %d\n",
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F_SETFL, O_NDELAY, cdsp->fd, ret_val, errno);
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errno = 0;
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ret_val = ioctl(cdsp->fd, TIOCFLUSH, &mode);
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debug (D_PORT, "ioctl of 0x%02x to fd %d on 0x%X returned %d errno %d\n",
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TIOCFLUSH, cdsp->fd, mode, ret_val, errno);
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#endif
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for (reg_num = 0; reg_num < N_OF_COM_REGS; reg_num++) {
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define_input_port_handler(cdsp->addr + reg_num,
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com_port_in);
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define_output_port_handler(cdsp->addr + reg_num,
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com_port_out);
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}
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cdsp->com_queue = create_queue(cdsp->irq);
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debug(D_PORT, "com%d: attached '%s' at addr 0x%04x irq %d\n",
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port, cdsp->path, cdsp->addr, cdsp->irq);
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}
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/* called when config.c initializes a single line */
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void
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init_com(int port, char *path, int addr, unsigned char irq)
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{
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struct com_data_struct *cdsp;
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debug (D_PORT, "init_com: port = 0x%04x, addr = 0x%04X, irq = %d.\n",
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port, addr, irq);
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cdsp = &(com_data[port]);
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cdsp->path = path; /* XXX DEBUG strcpy? */
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cdsp->addr = addr;
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cdsp->irq = irq;
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cdsp->fd = -1;
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com_set_line(cdsp, port + 1, TXLEN_8BITS | BITRATE_9600);
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}
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/* called when DOS wants to read directly from a physical port */
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unsigned char
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com_port_in(int port)
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{
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struct com_data_struct *cdsp;
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unsigned char rs;
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unsigned char i;
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int nbytes;
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/* search for a valid COM ???or MOUSE??? port */
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for (i = 0; i < N_COMS_MAX; i++) {
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if (com_data[i].addr == ((unsigned short)port & 0xfff8)) {
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cdsp = &(com_data[i]);
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break;
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}
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}
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if (i == N_COMS_MAX) {
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debug (D_PORT, "com port 0x%04x not found\n", port);
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return 0xff;
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}
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switch (port - cdsp->addr) {
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/* 0x03F8 - (receive buffer) or (divisor latch LO) */
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case 0:
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if (cdsp->line_ctrl & LC_DIV_ACC)
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rs = cdsp->div_latch[DIV_LATCH_LOW];
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else {
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#if 0
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if (queue_not_empty(cdsp->com_queue)) {
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rs = get_char_q(cdsp->com_queue);
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cdsp->last_char_read = rs;
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if (queue_not_empty(cdsp->com_queue) &&
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(cdsp->int_enable & IE_RCV_DATA) != 0) {
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debug(D_PORT,
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"com_port_in: setting irq %d because bytes yet to be read.\n",
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cdsp->irq);
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set_irq_request(cdsp->irq);
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}
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} else
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#else
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errno = 0;
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nbytes = read(cdsp->fd, &rs, 1);
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debug (D_PORT, "read of fd %d on '%s' returned %d byte 0x%02x errno %d\n",
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cdsp->fd, cdsp->path, nbytes, rs, errno);
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if (nbytes != 1)
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#endif
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rs = cdsp->last_char_read;
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}
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break;
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/* 0x03F9 - (interrupt enable) or (divisor latch HI) */
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case 1:
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if (cdsp->line_ctrl & LC_DIV_ACC)
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rs = cdsp->div_latch[DIV_LATCH_HIGH];
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else
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rs = cdsp->int_enable;
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/* 0x03FA - interrupt identification register */
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case 2:
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/* rs = cdsp->int_id; * XXX DEBUG not initialized */
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rs = 0;
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if ((queue_not_empty(cdsp->com_queue))
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&& (test_irq_request(cdsp->irq) != 0))
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rs |= II_PEND_INT | II_RCV_DATA;
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if ((cdsp->fifo_ctrl & FC_FIFO_EN) == FC_FIFO_EN)
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rs |= II_FIFOS_EN;
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break;
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/* 0x03FB - line control register */
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case 3:
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rs = cdsp->line_ctrl;
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break;
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/* 0x03FC - modem control register */
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case 4:
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rs = cdsp->modem_ctrl;
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break;
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/* 0x03FD - line status register */
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case 5:
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rs = LS_X_SHFT_E | LS_X_HOLD_E;
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/* if (queue_not_empty(cdsp->com_queue)) */
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ioctl(cdsp->fd, FIONREAD, &nbytes);
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if (nbytes > 0)
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rs |= LS_RCV_DATA_RD;
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break;
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/* 0x03FE - modem status register */
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case 6:
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rs = cdsp->modem_stat | MS_DCD | MS_DSR | MS_CTS;
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break;
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/* 0x03FF - spare register */
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case 7:
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rs = cdsp->uart_spare;
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break;
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default:
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debug(D_PORT, "com_port_in: illegal port index 0x%04x - 0x%04x\n",
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port, cdsp->addr);
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break;
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}
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return rs;
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}
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/* called when DOS wants to write directly to a physical port */
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void
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com_port_out(int port, unsigned char val)
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{
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struct com_data_struct *cdsp;
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int nbytes;
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int i;
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/* search for a valid COM ???or MOUSE??? port */
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for (i = 0; i < N_COMS_MAX; i++) {
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if (com_data[i].addr == ((unsigned short)port & 0xfff8)) {
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cdsp = &(com_data[i]);
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break;
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}
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}
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if (i == N_COMS_MAX) {
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debug (D_PORT, "com port 0x%04x not found\n", port);
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return;
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}
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switch (port - cdsp->addr) {
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/* 0x03F8 - (transmit buffer) or (divisor latch LO) */
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case 0:
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if (cdsp->line_ctrl & LC_DIV_ACC) {
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cdsp->div_latch[DIV_LATCH_LOW] = val;
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cdsp->flags |= DIV_LATCH_LOW_WRITTEN;
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write_div_latches(cdsp);
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} else {
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errno = 0;
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nbytes = write(cdsp->fd, &val, 1);
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debug (D_PORT, "write of 0x%02x to fd %d on '%s' returned %d errno %d\n",
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val, cdsp->fd, cdsp->path, nbytes, errno);
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if (nbytes != 1)
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debug(D_PORT,
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"int14: lost output character 0x%02x\n",
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val);
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}
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break;
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/* 0x03F9 - (interrupt enable) or (divisor latch HI) */
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case 1:
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if (cdsp->line_ctrl & LC_DIV_ACC) {
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cdsp->div_latch[DIV_LATCH_HIGH] = val;
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cdsp->flags |= DIV_LATCH_HIGH_WRITTEN;
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write_div_latches(cdsp);
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} else {
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cdsp->int_enable = val;
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if ((val & IE_RCV_DATA) == 0) {
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reset_irq_request(cdsp->irq);
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} else {
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if (queue_not_empty(cdsp->com_queue)) {
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set_irq_request(cdsp->irq);
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}
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}
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}
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break;
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/* 0x03FA - FIFO control register */
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case 2:
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cdsp->fifo_ctrl = val;
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break;
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/* 0x03FB - line control register */
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case 3:
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cdsp->line_ctrl = val;
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break;
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/* 0x03FC - modem control register */
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case 4:
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cdsp->modem_ctrl = val;
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break;
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/* 0x03FD - line status register */
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case 5:
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cdsp->line_stat = val;
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break;
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/* 0x03FE - modem status register */
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case 6:
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cdsp->modem_stat = val;
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break;
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/* 0x03FF - spare register */
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case 7:
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cdsp->uart_spare = val;
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break;
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default:
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debug(D_PORT, "com_port_out: illegal port index 0x%04x - 0x%04x\n",
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port, cdsp->addr);
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break;
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}
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}
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#if 0
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/*
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* called when BSD has bytes ready (as discovered via select) for DOS
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*/
|
|
static void do_com_input(int fd)
|
|
{
|
|
struct com_data_struct *cdsp;
|
|
unsigned char buffer[BUFSIZE];
|
|
int i, nbytes;
|
|
|
|
dp = search_com_device_by_fd(fd);
|
|
if (dp == NULL)
|
|
return;
|
|
do {
|
|
nbytes = read(cdsp->fd, buffer, BUFSIZE);
|
|
if (nbytes > 0) {
|
|
debug(D_PORT, "do_com_input: read %d bytes from fd %d (aka %d): ",
|
|
nbytes, fd, cdsp->fd);
|
|
for (i = 0; i < nbytes; i++) {
|
|
put_char_q(cdsp->com_queue, buffer[i]);
|
|
if (cdsp->int_enable & IE_RCV_DATA) {
|
|
debug(D_PORT, "\n");
|
|
debug(D_PORT, "do_com_input: setting irq %d because %d bytes read.\n",
|
|
dp->irq, nbytes);
|
|
debug(D_PORT, "do_com_input: ");
|
|
set_irq_request(dp->irq);
|
|
}
|
|
debug(D_PORT, "%02x ", buffer[i]);
|
|
}
|
|
debug(D_PORT, "\n");
|
|
}
|
|
} while (nbytes == BUFSIZE);
|
|
}
|
|
#endif 0
|