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Add support for using uart(4) for pulse capturing for the Pulse Per

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Second (PPS) timing interface. The support is non-optional and by
default uses the DCD line signal as the pulse input. A compile-time
option (UART_PPS_ON_CTS) can be used to have uart(4) use the CTS line
signal.

Include <sys/timepps.h> in uart_bus.h to avoid having to add the
inclusion of that header in all source files.

Reviewed by: phk
This commit is contained in:
Marcel Moolenaar 2003-09-11 23:06:42 +00:00
parent 78f94aa951
commit 8194412b89
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=119996
5 changed files with 45 additions and 2 deletions
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4
sys/conf/NOTES
View File

@ -1465,6 +1465,10 @@ options CONSPEED=115200 # Speed for serial console
#
device uart
# Options for uart(4)
options UART_PPS_ON_CTS # Do time pulse capturing using CTS
# instead of DCD.
# The following hint should only be used for pure ISA devices. It is not
# needed otherwise. Use of hints is strongly discouraged.
hint.uart.0.at="isa"

3
sys/conf/options
View File

@ -537,6 +537,9 @@ COM_MULTIPORT opt_sio.h
BREAK_TO_DEBUGGER opt_comconsole.h
ALT_BREAK_TO_DEBUGGER opt_comconsole.h
# Options to support PPS
UART_PPS_ON_CTS opt_uart.h
# options for bus/device framework
BUS_DEBUG opt_bus.h

17
sys/dev/uart/uart_bus.h
View File

@ -29,6 +29,12 @@
#ifndef _DEV_UART_BUS_H_
#define _DEV_UART_BUS_H_
#ifndef KLD_MODULE
#include "opt_uart.h"
#endif
#include <sys/timepps.h>
/* Drain and flush targets. */
#define UART_DRAIN_RECEIVER 0x0001
#define UART_DRAIN_TRANSMITTER 0x0002
@ -75,6 +81,14 @@
#define UART_SIGMASK_STATE 0x003f
#define UART_SIGMASK_DELTA 0x3f00
#ifdef UART_PPS_ON_CTS
#define UART_SIG_DPPS UART_SIG_DCTS
#define UART_SIG_PPS UART_SIG_CTS
#else
#define UART_SIG_DPPS UART_SIG_DDCD
#define UART_SIG_PPS UART_SIG_DCD
#endif
/* UART_IOCTL() requests */
#define UART_IOCTL_BREAK 1
#define UART_IOCTL_IFLOW 2
@ -133,6 +147,9 @@ struct uart_softc {
int sc_txdatasz;
int sc_txfifosz; /* Size of TX FIFO and buffer. */
/* Pulse capturing support (PPS). */
struct pps_state sc_pps;
/* Upper layer data. */
void *sc_softih;
uint32_t sc_ttypend;

12
sys/dev/uart/uart_core.c
View File

@ -162,6 +162,15 @@ uart_intr_sigchg(struct uart_softc *sc)
int new, old, sig;
sig = UART_GETSIG(sc);
if (sc->sc_pps.ppsparam.mode & PPS_CAPTUREBOTH) {
if (sig & UART_SIG_DPPS) {
pps_capture(&sc->sc_pps);
pps_event(&sc->sc_pps, (sig & UART_SIG_PPS) ?
PPS_CAPTUREASSERT : PPS_CAPTURECLEAR);
}
}
do {
old = sc->sc_ttypend;
new = old & ~UART_SIGMASK_STATE;
@ -393,6 +402,9 @@ uart_bus_attach(device_t dev)
sc->sc_sysdev->stopbits);
}
sc->sc_pps.ppscap = PPS_CAPTUREBOTH;
pps_init(&sc->sc_pps);
error = (sc->sc_sysdev != NULL && sc->sc_sysdev->attach != NULL)
? (*sc->sc_sysdev->attach)(sc) : uart_tty_attach(sc);
if (error)

11
sys/dev/uart/uart_tty.c
View File

@ -476,6 +476,9 @@ uart_tty_close(dev_t dev, int flags, int mode, struct thread *td)
if (sc->sc_sysdev == NULL)
UART_SETSIG(sc, UART_SIG_DDTR | UART_SIG_DRTS);
/* Disable pulse capturing. */
sc->sc_pps.ppsparam.mode = 0;
(*linesw[tp->t_line].l_close)(tp, flags);
ttyclose(tp);
wakeup(sc);
@ -505,6 +508,7 @@ uart_tty_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
if (error != ENOIOCTL)
return (error);
error = 0;
switch (cmd) {
case TIOCSBRK:
UART_IOCTL(sc, UART_IOCTL_BREAK, 1);
@ -563,7 +567,10 @@ uart_tty_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
*(int*)data = bits;
break;
default:
return (ENOTTY);
error = pps_ioctl(cmd, data, &sc->sc_pps);
if (error == ENODEV)
error = ENOTTY;
break;
}
return (0);
return (error);
}