summaryrefslogtreecommitdiff
path: root/sys/i386/isa/lpt.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/i386/isa/lpt.c')
-rw-r--r--sys/i386/isa/lpt.c150
1 files changed, 85 insertions, 65 deletions
diff --git a/sys/i386/isa/lpt.c b/sys/i386/isa/lpt.c
index 42f92c74f8d0..2715ea8b193f 100644
--- a/sys/i386/isa/lpt.c
+++ b/sys/i386/isa/lpt.c
@@ -46,7 +46,7 @@
* SUCH DAMAGE.
*
* from: unknown origin, 386BSD 0.1
- * $Id: lpt.c,v 1.9 1994/02/22 09:05:13 rgrimes Exp $
+ * $Id: lpt.c,v 1.13 1994/06/08 14:34:54 davidg Exp $
*/
/*
@@ -66,11 +66,14 @@
#include "ioctl.h"
#include "tty.h"
#include "uio.h"
+#include "syslog.h"
#include "i386/isa/isa.h"
#include "i386/isa/isa_device.h"
#include "i386/isa/lptreg.h"
+#include "i386/include/lpt.h"
+
#define LPINITRDY 4 /* wait up to 4 seconds for a ready */
#define LPTOUTTIME 4 /* wait up to 4 seconds for a ready */
#define LPPRI (PZERO+8)
@@ -90,15 +93,6 @@
int lptflag = 1;
#endif
-void lptout();
-
-int lptprobe(), lptattach();
-void lptintr();
-
-struct isa_driver lptdriver = {
- lptprobe, lptattach, "lpt"
-};
-
#define LPTUNIT(s) ((s)&0x03)
#define LPTFLAGS(s) ((s)&0xfc)
@@ -122,6 +116,8 @@ struct lpt_softc {
u_char sc_irq ; /* IRQ status of port */
#define LP_HAS_IRQ 0x01 /* we have an irq available */
#define LP_USE_IRQ 0x02 /* we are using our irq */
+#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */
+
} lpt_sc[NLPT] ;
/* bits for state */
@@ -149,12 +145,21 @@ struct lpt_softc {
#define MAX_SPIN 20 /* Max delay for device ready in usecs */
+static void lptout (struct lpt_softc * sc);
+int lptprobe (struct isa_device *dvp);
+int lptattach (struct isa_device *isdp);
+void lptintr (int unit);
+
+struct isa_driver lptdriver = {
+ lptprobe, lptattach, "lpt"
+};
+
/*
* Internal routine to lptprobe to do port tests of one byte value
*/
-int
+static int
lpt_port_test(short port, u_char data, u_char mask)
{
int temp, timeout;
@@ -279,8 +284,7 @@ end_probe:
/* XXX Todo - try and detect if interrupt is working */
int
-lptattach(isdp)
- struct isa_device *isdp;
+lptattach(struct isa_device *isdp)
{
struct lpt_softc *sc;
@@ -292,7 +296,7 @@ lptattach(isdp)
/* check if we can use interrupt */
lprintf("oldirq %x\n", sc->sc_irq);
if(isdp->id_irq) {
- sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ;
+ sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ;
printf("lpt%d: Interrupt-driven port\n", isdp->id_unit);
} else {
sc->sc_irq = 0;
@@ -308,9 +312,7 @@ lptattach(isdp)
*/
int
-lptopen(dev, flag)
- dev_t dev;
- int flag;
+lptopen(dev_t dev, int flag)
{
struct lpt_softc *sc;
int s;
@@ -321,7 +323,6 @@ lptopen(dev, flag)
if ((unit >= NLPT) || (sc->sc_port == 0))
return (ENXIO);
- /* Only check open bit */
if (sc->sc_state) {
lprintf("lp: still open\n") ;
lprintf("still open %x\n", sc->sc_state);
@@ -333,6 +334,13 @@ lptopen(dev, flag)
lprintf("lp flags 0x%x\n", sc->sc_flags);
port = sc->sc_port;
+ /* set IRQ status according to ENABLE_IRQ flag */
+ if(sc->sc_irq & LP_ENABLE_IRQ)
+ sc->sc_irq |= LP_USE_IRQ;
+ else
+ sc->sc_irq &= ~LP_USE_IRQ;
+
+
/* init printer */
if((sc->sc_flags & LP_NO_PRIME) == 0) {
if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) {
@@ -384,20 +392,19 @@ lptopen(dev, flag)
lprintf("irq %x\n", sc->sc_irq);
if(sc->sc_irq & LP_USE_IRQ) {
sc->sc_state |= TOUT;
- timeout (lptout, (caddr_t)sc, hz/2);
+ timeout ((timeout_func_t)lptout, (caddr_t)sc, hz/2);
}
lprintf("opened.\n");
return(0);
}
-void
-lptout (sc)
- struct lpt_softc *sc;
+static void
+lptout (struct lpt_softc * sc)
{ int pl;
lprintf ("T %x ", inb(sc->sc_port+lpt_status));
if (sc->sc_state&OPEN)
- timeout (lptout, (caddr_t)sc, hz/2);
+ timeout ((timeout_func_t)lptout, (caddr_t)sc, hz/2);
else sc->sc_state &= ~TOUT;
if (sc->sc_state & ERROR)
@@ -423,9 +430,7 @@ lptout (sc)
*/
int
-lptclose(dev, flag)
- dev_t dev;
- int flag;
+lptclose(dev_t dev, int flag)
{
struct lpt_softc *sc = lpt_sc + LPTUNIT(minor(dev));
int port = sc->sc_port;
@@ -458,13 +463,13 @@ lptclose(dev, flag)
* This code is only used when we are polling the port
*/
static int
-pushbytes(sc)
- struct lpt_softc *sc;
+pushbytes(struct lpt_softc * sc)
{
int spin, err, tic;
char ch;
int port = sc->sc_port;
+ lprintf("p");
/* loop for every character .. */
while (sc->sc_xfercnt > 0) {
/* printer data */
@@ -518,9 +523,7 @@ pushbytes(sc)
*/
int
-lptwrite(dev, uio)
- dev_t dev;
- struct uio *uio;
+lptwrite(dev_t dev, struct uio * uio)
{
register unsigned n;
int pl, err;
@@ -531,26 +534,26 @@ lptwrite(dev, uio)
sc->sc_cp = sc->sc_inbuf->b_un.b_addr ;
uiomove(sc->sc_cp, n, uio);
sc->sc_xfercnt = n ;
- if(sc->sc_irq & LP_USE_IRQ)
- while (sc->sc_xfercnt > 0) {
- lprintf("i");
- /* if the printer is ready for a char, */
- /* give it one */
- if ((sc->sc_state & OBUSY) == 0){
- lprintf("\nC %d. ", sc->sc_xfercnt);
- pl = spltty();
- lptintr(sc - lpt_sc);
- (void) splx(pl);
- }
- lprintf("W ");
- if (sc->sc_state & OBUSY)
- if (err = tsleep ((caddr_t)sc,
- LPPRI|PCATCH, "lpwrite", 0)) {
- sc->sc_state |= INTERRUPTED;
- return(err);
- }
+ while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) {
+ lprintf("i");
+ /* if the printer is ready for a char, */
+ /* give it one */
+ if ((sc->sc_state & OBUSY) == 0){
+ lprintf("\nC %d. ", sc->sc_xfercnt);
+ pl = spltty();
+ lptintr(sc - lpt_sc);
+ (void) splx(pl);
}
- else { /* polled write */
+ lprintf("W ");
+ if (sc->sc_state & OBUSY)
+ if (err = tsleep ((caddr_t)sc,
+ LPPRI|PCATCH, "lpwrite", 0)) {
+ sc->sc_state |= INTERRUPTED;
+ return(err);
+ }
+ }
+ /* check to see if we must do a polled write */
+ if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) {
lprintf("p");
if((err = pushbytes(sc)))
return(err);
@@ -567,8 +570,7 @@ lptwrite(dev, uio)
*/
void
-lptintr(unit)
- int unit;
+lptintr(int unit)
{
struct lpt_softc *sc = lpt_sc + unit;
int port = sc->sc_port, sts;
@@ -607,22 +609,40 @@ lptintr(unit)
}
int
-lptioctl(dev, cmd, data, flag)
- dev_t dev;
- int cmd;
- caddr_t data;
- int flag;
+lptioctl(dev_t dev, int cmd, caddr_t data, int flag)
{
- int error;
+ int error = 0;
+ struct lpt_softc *sc;
+ u_int unit = LPTUNIT(minor(dev));
+ u_char old_sc_irq; /* old printer IRQ status */
+
+ sc = lpt_sc + unit;
- error = 0;
switch (cmd) {
-#ifdef THISISASAMPLE
- case XXX:
- dothis; andthis; andthat;
- error=x;
- break;
-#endif /* THISISASAMPLE */
+ case LPT_IRQ :
+ if(sc->sc_irq & LP_HAS_IRQ) {
+ /*
+ * NOTE:
+ * If the IRQ status is changed,
+ * this will only be visible on the
+ * next open.
+ *
+ * If interrupt status changes,
+ * this gets syslog'd.
+ */
+ old_sc_irq = sc->sc_irq;
+ if(*(int*)data == 0)
+ sc->sc_irq &= (~LP_ENABLE_IRQ);
+ else
+ sc->sc_irq |= LP_ENABLE_IRQ;
+ if (old_sc_irq != sc->sc_irq )
+ log(LOG_NOTICE, "lpt%c switched to %s mode\n",
+ (char)unit+'0',
+ (sc->sc_irq & LP_ENABLE_IRQ)?
+ "interrupt-driven":"polled");
+ } else /* polled port */
+ error = EOPNOTSUPP;
+ break;
default:
error = ENODEV;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-08 04:05:14 +0000