/*
 * Device driver for Specialix range (SLXOS) of serial line multiplexors.
 *	SLXOS configuration and debug interface
 *
 * Copyright (C) 1990, 1992 Specialix International,
 * Copyright (C) 1993, Andy Rutter <andy@acronym.co.uk>
 * Copyright (C) 1995, Peter Wemm <peter@haywire.dialix.com>
 *
 * Derived from:	SunOS 4.x version
 *
 * 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
 *    notices, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notices, 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 by Andy Rutter of
 *	Advanced Methods and Tools Ltd. based on original information
 *	from Specialix International.
 * 4. Neither the name of Advanced Methods and Tools, nor Specialix
 *    International may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ``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 AUTHORS BE LIABLE.
 *
 * $FreeBSD: src/usr.sbin/sicontrol/sicontrol.c,v 1.12.2.1 2000/12/11 01:03:39 obrien Exp $
 * $DragonFly: src/usr.sbin/sicontrol/sicontrol.c,v 1.6 2007/04/09 09:15:48 swildner Exp $
 */

#define _KERNEL_STRUCTURES

#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/tty.h>

#include <dev/serial/si/si.h>

#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define	U_DEBUG		0
#define	U_TXINT		1
#define	U_RXINT		2
#define	U_NPORT		3
#define	U_MSTATE	4
#define	U_STAT_CCB	5
#define	U_STAT_TTY	6
#define	U_MAX		7
#define	U_ALL		-1

static void	ccb_stat(int, char **);
static void	debug(int, char **);
static void	dostat(void);
static int	getnum(char *);
static int	islevel(char *);
static int	lvls2bits(char *);
static void	mstate(int, char **);
static void	nport(int, char **);
static int	opencontrol(void);
static void	prlevels(int);
static void	prusage(int, int);
static void	rxint(int, char **);
static void	tty_stat(int, char **);
static void	txint(int, char **);

static struct lv {
	const char *lv_name;
	int 	lv_bit;
} lv[] = {
	{"entry",	DBG_ENTRY},
	{"open",	DBG_OPEN},
	{"close",	DBG_CLOSE},
	{"read",	DBG_READ},
	{"write",	DBG_WRITE},
	{"param",	DBG_PARAM},
	{"modem",	DBG_MODEM},
	{"select",	DBG_SELECT},
	{"optim",	DBG_OPTIM},
	{"intr",	DBG_INTR},
	{"start",	DBG_START},
	{"lstart",	DBG_LSTART},
	{"ioctl",	DBG_IOCTL},
	{"fail",	DBG_FAIL},
	{"autoboot",	DBG_AUTOBOOT},
	{"download",	DBG_DOWNLOAD},
	{"drain",	DBG_DRAIN},
	{"poll",	DBG_POLL},
	{0,		0}
};

static struct opt {
	const char *o_name;
	void	(*o_func)(int, char **);
} opt[] = {
	{"debug",		debug},
	{"rxint_throttle",	rxint},
	{"int_throttle",	txint},
	{"nport",		nport},
	{"mstate",		mstate},
	{"ccbstat",		ccb_stat},
	{"ttystat",		tty_stat},
	{0,			0}
};

static struct stat_list {
	void (*st_func)(int, char **);
} stat_list[] = {
	{mstate},
	{0}
};

static const char *usagestr[] = {
	"debug [[add|del|set debug_levels] | [off]]\n",
	"int_throttle [newvalue]\n",
	"rxint_throttle [newvalue]\n",
	"nport\n",
	"mstate\n",
	"ccbstat\n",
	"ttystat\n",
	0
};

static int alldev = 0;
static int ctlfd;
static char *Devname;
static struct si_tcsi tc;

int
main(int argc, char **argv)
{
	struct opt *op;
	void (*func)(int, char **) = NULL;

	if (argc < 2)
		prusage(U_ALL, 1);
	Devname = argv[1];
	if (strcmp(Devname, "-") == 0) {
		alldev = 1;
	} else {
		sidev_t dev;
		struct stat st;

		if (strchr(Devname, '/') == NULL) {
			char *acp = malloc(6 + strlen(Devname));
			strcpy(acp, _PATH_DEV);
			strcat(acp, Devname);
			Devname = acp;
		}
		if (stat(Devname, &st) < 0)
			errx(1, "can't stat %s", Devname);
		dev.sid_card = SI_CARD(minor(st.st_rdev));
		dev.sid_port = SI_PORT(minor(st.st_rdev));
		dev.sid_control = 0;
		tc.tc_dev = dev;
	}
	ctlfd = opencontrol();
	if (argc == 2) {
		dostat();
		exit(0);
	}

	argc--; argv++;
	for (op = opt; op->o_name; op++) {
		if (strcmp(argv[1], op->o_name) == 0) {
			func = op->o_func;
			break;
		}
	}
	if (func == NULL)
		prusage(U_ALL, 1);

	argc -= 2;
	argv += 2;
	(*func)(argc, argv);
	exit(0);
}

int
opencontrol(void)
{
	int fd;

	fd = open(CONTROLDEV, O_RDWR|O_NDELAY);
	if (fd < 0)
		err(1, "open on %s", CONTROLDEV);
	return(fd);
}

/*
 * Print a usage message - this relies on U_DEBUG==0 and U_BOOT==1.
 * Don't print the DEBUG usage string unless explicity requested.
 */
void
prusage(int strn, int eflag)
{
	const char **cp;

	if (strn == U_ALL) {
		fprintf(stderr, "usage: sicontrol %s", usagestr[1]);
		fprintf(stderr, "       sicontrol %s", usagestr[2]);
		fprintf(stderr, "       sicontrol %s", usagestr[3]);
		fprintf(stderr, "       sicontrol devname %s", usagestr[4]);
		for (cp = &usagestr[5]; *cp; cp++)
			fprintf(stderr, "       sicontrol devname %s", *cp);
	}
	else if (strn >= 0 && strn <= U_MAX)
		fprintf(stderr, "usage: sicontrol devname %s", usagestr[strn]);
	else
		fprintf(stderr, "sicontrol: usage ???\n");
	exit(eflag);
}

/* print port status */
void
dostat(void)
{
	char *av[1], *acp;
	struct stat_list *stp;
	struct si_tcsi stc;
	int donefirst = 0;

	printf("%s: ", alldev ? "ALL" : Devname);
	acp = malloc(strlen(Devname) + 3);
	memset(acp, ' ', strlen(Devname));
	strcat(acp, "  ");
	stc = tc;
	for (stp = stat_list; stp->st_func != NULL; stp++) {
		if (donefirst)
			fputs(acp, stdout);
		else
			donefirst++;
		av[0] = NULL;
		tc = stc;
		(*stp->st_func)(-1, av);
	}
}

/*
 * debug
 * debug [[set|add|del debug_lvls] | [off]]
 */
void
debug(int ac, char **av)
{
	int level;

	if (ac > 2)
		prusage(U_DEBUG, 1);
	if (alldev) {
		if (ioctl(ctlfd, TCSIGDBG_ALL, &tc.tc_dbglvl) < 0)
			err(1, "TCSIGDBG_ALL on %s", Devname);
	} else {
		if (ioctl(ctlfd, TCSIGDBG_LEVEL, &tc) < 0)
			err(1, "TCSIGDBG_LEVEL on %s", Devname);
	}

	switch (ac) {
	case 0:
		printf("%s: debug levels - ", Devname);
		prlevels(tc.tc_dbglvl);
		return;
	case 1:
		if (strcmp(av[0], "off") == 0) {
			tc.tc_dbglvl = 0;
			break;
		}
		prusage(U_DEBUG, 1);
		/* no return */
	case 2:
		level = lvls2bits(av[1]);
		if (strcmp(av[0], "add") == 0)
			tc.tc_dbglvl |= level;
		else if (strcmp(av[0], "del") == 0)
			tc.tc_dbglvl &= ~level;
		else if (strcmp(av[0], "set") == 0)
			tc.tc_dbglvl = level;
		else
			prusage(U_DEBUG, 1);
	}
	if (alldev) {
		if (ioctl(ctlfd, TCSISDBG_ALL, &tc.tc_dbglvl) < 0)
			err(1, "TCSISDBG_ALL on %s", Devname);
	} else {
		if (ioctl(ctlfd, TCSISDBG_LEVEL, &tc) < 0)
			err(1, "TCSISDBG_LEVEL on %s", Devname);
	}
}

void
rxint(int ac, char **av)
{
	tc.tc_port = 0;
	switch (ac) {
	case 0:
		printf("%s: ", Devname);
	case -1:
		if (ioctl(ctlfd, TCSIGRXIT, &tc) < 0)
			err(1, "TCSIGRXIT");
		printf("RX interrupt throttle: %d msec\n", tc.tc_int*10);
		break;
	case 1:
		tc.tc_int = getnum(av[0]) / 10;
		if (tc.tc_int == 0)
			tc.tc_int = 1;
		if (ioctl(ctlfd, TCSIRXIT, &tc) < 0)
			err(1, "TCSIRXIT on %s at %d msec",
				Devname, tc.tc_int*10);
		break;
	default:
		prusage(U_RXINT, 1);
	}
}

void
txint(int ac, char **av)
{

	tc.tc_port = 0;
	switch (ac) {
	case 0:
		printf("%s: ", Devname);
	case -1:
		if (ioctl(ctlfd, TCSIGIT, &tc) < 0)
			err(1, "TCSIGIT");
		printf("aggregate interrupt throttle: %d\n", tc.tc_int);
		break;
	case 1:
		tc.tc_int = getnum(av[0]);
		if (ioctl(ctlfd, TCSIIT, &tc) < 0)
			err(1, "TCSIIT on %s at %d", Devname, tc.tc_int);
		break;
	default:
		prusage(U_TXINT, 1);
	}
}

void
mstate(int ac, char **av __unused)
{
	switch (ac) {
	case 0:
		printf("%s: ", Devname);
	case -1:
		break;
	default:
		prusage(U_MSTATE, 1);
	}
	if (ioctl(ctlfd, TCSISTATE, &tc) < 0)
		err(1, "TCSISTATE on %s", Devname);
	printf("modem bits state - (0x%x)", tc.tc_int);
	if (tc.tc_int & IP_DCD)	printf(" DCD");
	if (tc.tc_int & IP_DTR)	printf(" DTR");
	if (tc.tc_int & IP_RTS)	printf(" RTS");
	printf("\n");
}

void
nport(int ac, char **av __unused)
{
	int ports;

	if (ac != 0)
		prusage(U_NPORT, 1);
	if (ioctl(ctlfd, TCSIPORTS, &ports) < 0)
		err(1, "TCSIPORTS on %s", Devname);
	printf("SLXOS: total of %d ports\n", ports);
}

void
ccb_stat(int ac, char **av __unused)
{
	struct si_pstat sip;
#define	CCB	sip.tc_ccb

	if (ac != 0)
		prusage(U_STAT_CCB, 1);
	sip.tc_dev = tc.tc_dev;
	if (ioctl(ctlfd, TCSI_CCB, &sip) < 0)
		err(1, "TCSI_CCB on %s", Devname);
	printf("%s: ", Devname);

							/* WORD	next - Next Channel */
							/* WORD	addr_uart - Uart address */
							/* WORD	module - address of module struct */
	printf("\tuart_type 0x%x\n", CCB.type);		/* BYTE type - Uart type */
							/* BYTE	fill - */
	printf("\tx_status 0x%x\n", CCB.x_status);	/* BYTE	x_status - XON / XOFF status */
	printf("\tc_status 0x%x\n", CCB.c_status);	/* BYTE	c_status - cooking status */
	printf("\thi_rxipos 0x%x\n", CCB.hi_rxipos);	/* BYTE	hi_rxipos - stuff into rx buff */
	printf("\thi_rxopos 0x%x\n", CCB.hi_rxopos);	/* BYTE	hi_rxopos - stuff out of rx buffer */
	printf("\thi_txopos 0x%x\n", CCB.hi_txopos);	/* BYTE	hi_txopos - Stuff into tx ptr */
	printf("\thi_txipos 0x%x\n", CCB.hi_txipos);	/* BYTE	hi_txipos - ditto out */
	printf("\thi_stat 0x%x\n", CCB.hi_stat);		/* BYTE	hi_stat - Command register */
	printf("\tdsr_bit 0x%x\n", CCB.dsr_bit);		/* BYTE	dsr_bit - Magic bit for DSR */
	printf("\ttxon 0x%x\n", CCB.txon);		/* BYTE	txon - TX XON char */
	printf("\ttxoff 0x%x\n", CCB.txoff);		/* BYTE	txoff - ditto XOFF */
	printf("\trxon 0x%x\n", CCB.rxon);		/* BYTE	rxon - RX XON char */
	printf("\trxoff 0x%x\n", CCB.rxoff);		/* BYTE	rxoff - ditto XOFF */
	printf("\thi_mr1 0x%x\n", CCB.hi_mr1);		/* BYTE	hi_mr1 - mode 1 image */
	printf("\thi_mr2 0x%x\n", CCB.hi_mr2);		/* BYTE	hi_mr2 - mode 2 image */
        printf("\thi_csr 0x%x\n", CCB.hi_csr);		/* BYTE	hi_csr - clock register */
	printf("\thi_op 0x%x\n", CCB.hi_op);		/* BYTE	hi_op - Op control */
	printf("\thi_ip 0x%x\n", CCB.hi_ip);		/* BYTE	hi_ip - Input pins */
	printf("\thi_state 0x%x\n", CCB.hi_state);	/* BYTE	hi_state - status */
	printf("\thi_prtcl 0x%x\n", CCB.hi_prtcl);	/* BYTE	hi_prtcl - Protocol */
	printf("\thi_txon 0x%x\n", CCB.hi_txon);		/* BYTE	hi_txon - host copy tx xon stuff */
	printf("\thi_txoff 0x%x\n", CCB.hi_txoff);	/* BYTE	hi_txoff - */
	printf("\thi_rxon 0x%x\n", CCB.hi_rxon);		/* BYTE	hi_rxon - */
	printf("\thi_rxoff 0x%x\n", CCB.hi_rxoff);	/* BYTE	hi_rxoff - */
	printf("\tclose_prev 0x%x\n", CCB.close_prev);	/* BYTE	close_prev - Was channel previously closed */
	printf("\thi_break 0x%x\n", CCB.hi_break);	/* BYTE	hi_break - host copy break process */
	printf("\tbreak_state 0x%x\n", CCB.break_state);	/* BYTE	break_state - local copy ditto */
	printf("\thi_mask 0x%x\n", CCB.hi_mask);		/* BYTE	hi_mask - Mask for CS7 etc. */
	printf("\tmask_z280 0x%x\n", CCB.mask_z280);	/* BYTE	mask_z280 - Z280's copy */
							/* BYTE	res[0x60 - 36] - */
							/* BYTE	hi_txbuf[SLXOS_BUFFERSIZE] - */
							/* BYTE	hi_rxbuf[SLXOS_BUFFERSIZE] - */
							/* BYTE	res1[0xA0] - */
}

void
tty_stat(int ac, char **av __unused)
{
	struct si_pstat sip;
#define	TTY	sip.tc_tty

	if (ac != 0)
		prusage(U_STAT_TTY, 1);
	sip.tc_dev = tc.tc_dev;
	if (ioctl(ctlfd, TCSI_TTY, &sip) < 0)
		err(1, "TCSI_TTY on %s", Devname);
	printf("%s: ", Devname);

	printf("\tt_outq.c_cc %d.\n", TTY.t_outq.c_cc);	/* struct clist t_outq */
	printf("\tt_dev %p\n", TTY.t_dev);		/* t_dev */
	printf("\tt_flags 0x%x\n", TTY.t_flags);	/* int	t_flags */
	printf("\tt_state 0x%x\n", TTY.t_state);	/* int	t_state */
	printf("\tt_ihiwat %d.\n", TTY.t_ihiwat);	/* int	t_ihiwat */
	printf("\tt_ilowat %d.\n", TTY.t_ilowat);	/* int	t_ilowat */
	printf("\tt_ohiwat %d.\n", TTY.t_ohiwat);	/* int	t_ohiwat */
	printf("\tt_olowat %d.\n", TTY.t_olowat);	/* int	t_olowat */
	printf("\tt_iflag 0x%x\n", TTY.t_iflag);	/* t_iflag */
	printf("\tt_oflag 0x%x\n", TTY.t_oflag);	/* t_oflag */
	printf("\tt_cflag 0x%x\n", TTY.t_cflag);	/* t_cflag */
	printf("\tt_lflag 0x%x\n", TTY.t_lflag);	/* t_lflag */
	printf("\tt_cc %p\n", (void *)TTY.t_cc);	/* t_cc */
	printf("\tt_termios.c_ispeed 0x%x\n", TTY.t_termios.c_ispeed);	/* t_termios.c_ispeed */
	printf("\tt_termios.c_ospeed 0x%x\n", TTY.t_termios.c_ospeed);	/* t_termios.c_ospeed */
}

int
islevel(char *tk)
{
	struct lv *lvp;
	char *acp;

	for (acp = tk; *acp; acp++)
		if (isupper(*acp))
			*acp = tolower(*acp);
	for (lvp = lv; lvp->lv_name; lvp++)
		if (strcmp(lvp->lv_name, tk) == 0)
			return(lvp->lv_bit);
	return(0);
}

/*
 * Convert a string consisting of tokens separated by white space, commas
 * or `|' into a bitfield - flag any unrecognised tokens.
 */
int
lvls2bits(char *str)
{
	int i, bits = 0;
	int errflag = 0;
	char token[20];

	while (sscanf(str, "%[^,| \t]", token) == 1) {
		str += strlen(token);
		while (isspace(*str) || *str==',' || *str=='|')
			str++;
		if (strcmp(token, "all") == 0)
			return(0xffffffff);
		if ((i = islevel(token)) == 0) {
			warnx("unknown token '%s'", token);
			errflag++;
		} else
			bits |= i;
	}
	if (errflag)
		exit(1);

	return(bits);
}

int
getnum(char *str)
{
	int x;
	char *acp = str;

	x = 0;
	while (*acp) {
		if (!isdigit(*acp))
			errx(1, "%s is not a number", str);
		x *= 10;
		x += (*acp - '0');
		acp++;
	}
	return(x);
}

void
prlevels(int x)
{
	struct lv *lvp;

	switch (x) {
	case 0:
		printf("(none)\n");
		break;
	case 0xffffffff:
		printf("all\n");
		break;
	default:
		for (lvp = lv; lvp->lv_name; lvp++)
			if (x & lvp->lv_bit)
				printf(" %s", lvp->lv_name);
		printf("\n");
	}
}