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Add modemcontrol support for DTR and DCD.

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Tested by:	ambrisko
This commit is contained in:
Poul-Henning Kamp 2004-07-04 16:27:58 +00:00
parent 95cc51cfbd
commit c24097e458
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131579
1 changed files with 37 additions and 6 deletions
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43
sys/dev/nmdm/nmdm.c
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@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$");
#include <sys/poll.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/serial.h>
#include <sys/vnode.h>
#include <sys/signalvar.h>
#include <sys/malloc.h>
@ -58,6 +59,7 @@ MALLOC_DEFINE(M_NLMDM, "nullmodem", "nullmodem data structures");
static void nmdmstart(struct tty *tp);
static void nmdmstop(struct tty *tp, int rw);
static void nmdminit(struct cdev *dev);
static t_modem_t nmdmmodem;
static d_open_t nmdmopen;
static d_close_t nmdmclose;
@ -76,9 +78,9 @@ static struct cdevsw nmdm_cdevsw = {
#define BFLAG CLONE_FLAG0
struct softpart {
struct tty *nm_tty;
struct cdev *dev;
int dcd;
struct tty *nm_tty;
struct cdev *dev;
int nm_dcd;
struct task pt_task;
struct softpart *other;
};
@ -151,14 +153,14 @@ nmdm_task_tty(void *arg, int pending __unused)
otp = sp->other->nm_tty;
KASSERT(otp != NULL, ("NULL otp in nmdmstart"));
KASSERT(otp != tp, ("NULL otp == tp nmdmstart"));
if (sp->other->dcd) {
if (sp->other->nm_dcd) {
if (!(tp->t_state & TS_ISOPEN)) {
sp->other->dcd = 0;
sp->other->nm_dcd = 0;
(void)ttyld_modem(otp, 0);
}
} else {
if (tp->t_state & TS_ISOPEN) {
sp->other->dcd = 1;
sp->other->nm_dcd = 1;
(void)ttyld_modem(otp, 1);
}
}
@ -200,6 +202,7 @@ nmdminit(struct cdev *dev1)
pt->part1.nm_tty = ttymalloc(pt->part1.nm_tty);
pt->part1.nm_tty->t_oproc = nmdmstart;
pt->part1.nm_tty->t_stop = nmdmstop;
pt->part1.nm_tty->t_modem = nmdmmodem;
pt->part1.nm_tty->t_dev = dev1;
pt->part1.nm_tty->t_sc = &pt->part1;
TASK_INIT(&pt->part1.pt_task, 0, nmdm_task_tty, pt->part1.nm_tty);
@ -207,6 +210,7 @@ nmdminit(struct cdev *dev1)
pt->part2.nm_tty = ttymalloc(pt->part2.nm_tty);
pt->part2.nm_tty->t_oproc = nmdmstart;
pt->part2.nm_tty->t_stop = nmdmstop;
pt->part2.nm_tty->t_modem = nmdmmodem;
pt->part2.nm_tty->t_dev = dev2;
pt->part2.nm_tty->t_sc = &pt->part2;
TASK_INIT(&pt->part2.pt_task, 0, nmdm_task_tty, pt->part2.nm_tty);
@ -259,6 +263,33 @@ nmdmopen(struct cdev *dev, int flag, int devtype, struct thread *td)
return (error);
}
static int
nmdmmodem(struct tty *tp, int sigon, int sigoff)
{
struct softpart *sp;
int i;
sp = tp->t_sc;
if (sigon || sigoff) {
if (sigon & SER_DTR) {
sp->other->nm_dcd = 1;
ttyld_modem(sp->other->nm_tty, sp->other->nm_dcd);
}
if (sigoff & SER_DTR) {
sp->other->nm_dcd = 0;
ttyld_modem(sp->other->nm_tty, sp->other->nm_dcd);
}
return (0);
} else {
i = 0;
if (sp->nm_dcd)
i |= SER_DCD;
if (sp->other->nm_dcd)
i |= SER_DTR;
return (i);
}
}
static int
nmdmclose(struct cdev *dev, int flag, int mode, struct thread *td)
{