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authorleo <leo@NetBSD.org>1996-03-27 10:20:44 +0000
committerleo <leo@NetBSD.org>1996-03-27 10:20:44 +0000
commit28e46e648fd734e8840ae2ee507e9df3a5f4eae4 (patch)
tree6fa49aed6c68f8ad298a459c1b1ec416bf149eed /sys/arch/atari/dev
parent8526e9844ca7da2becd51fc0a99fbce62778342a (diff)
Add centronics printer driver.
Diffstat (limited to 'sys/arch/atari/dev')
-rw-r--r--sys/arch/atari/dev/lpt.c417
1 files changed, 417 insertions, 0 deletions
diff --git a/sys/arch/atari/dev/lpt.c b/sys/arch/atari/dev/lpt.c
new file mode 100644
index 00000000000..c6403f599fe
--- /dev/null
+++ b/sys/arch/atari/dev/lpt.c
@@ -0,0 +1,417 @@
+/* $NetBSD: lpt.c,v 1.1 1996/03/27 10:21:05 leo Exp $ */
+
+/*
+ * Copyright (c) 1996 Leo Weppelman
+ * Copyright (c) 1993, 1994 Charles Hannum.
+ * Copyright (c) 1990 William F. Jolitz, TeleMuse
+ * All rights reserved.
+ *
+ * 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
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, 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 software is a component of "386BSD" developed by
+ * William F. Jolitz, TeleMuse.
+ * 4. Neither the name of the developer nor the name "386BSD"
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
+ * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
+ * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
+ * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
+ * NOT MAKE USE OF THIS WORK.
+ *
+ * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
+ * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
+ * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
+ * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
+ * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
+ * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
+ * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
+ * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``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 DEVELOPER BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Device Driver originally written for AT parallel printer port. Now
+ * drives the printer port on the YM2149.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/user.h>
+#include <sys/buf.h>
+#include <sys/kernel.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/syslog.h>
+
+#include <machine/cpu.h>
+#include <machine/iomap.h>
+#include <machine/mfp.h>
+
+#include <atari/dev/ym2149reg.h>
+
+#define TIMEOUT hz*16 /* wait up to 16 seconds for a ready */
+#define STEP hz/4
+
+#define LPTPRI (PZERO+8)
+#define LPT_BSIZE 1024
+
+#if !defined(DEBUG) || !defined(notdef)
+#define lprintf if (0) printf
+#else
+#define lprintf if (lptdebug) printf
+int lptdebug = 1;
+#endif
+
+struct lpt_softc {
+ struct device sc_dev;
+ size_t sc_count;
+ struct buf *sc_inbuf;
+ u_char *sc_cp;
+ int sc_spinmax;
+ u_char sc_state;
+#define LPT_OPEN 0x01 /* device is open */
+#define LPT_OBUSY 0x02 /* printer is busy doing output */
+#define LPT_INIT 0x04 /* waiting to initialize for open */
+ u_char sc_flags;
+#define LPT_AUTOLF 0x20 /* automatic LF on CR XXX: LWP - not yet... */
+#define LPT_NOINTR 0x40 /* do not use interrupt */
+};
+
+#define LPTUNIT(s) (minor(s) & 0x1f)
+#define LPTFLAGS(s) (minor(s) & 0xe0)
+#define NOT_READY() (MFP->mf_gpip & IO_PBSY)
+
+/* {b,c}devsw[] function prototypes */
+dev_type_open(lptopen);
+dev_type_close(lptclose);
+dev_type_write(lptwrite);
+dev_type_ioctl(lptioctl);
+
+static void lptwakeup __P((void *arg));
+static int pushbytes __P((struct lpt_softc *));
+
+int lptintr __P((void));
+
+/*
+ * Autoconfig stuff
+ */
+static void lptattach __P((struct device *, struct device *, void *));
+static int lptmatch __P((struct device *, void *, void *));
+
+struct cfattach lpt_ca = {
+ sizeof(struct lpt_softc), lptmatch, lptattach
+};
+
+struct cfdriver lpt_cd = {
+ NULL, "lpt", DV_DULL, NULL, 0
+};
+
+/*ARGSUSED*/
+static int
+lptmatch(pdp, match, auxp)
+struct device *pdp;
+void *match, *auxp;
+{
+ struct cfdata *cfp = match;
+
+ if (!strcmp((char *)auxp, "*") && cfp->cf_unit == 0)
+ return (1);
+ return (0);
+}
+
+/*ARGSUSED*/
+static void
+lptattach(pdp, dp, auxp)
+struct device *pdp, *dp;
+void *auxp;
+{
+ struct lpt_softc *sc = (void *)dp;
+
+ sc->sc_state = 0;
+
+ ym2149_strobe(1);
+
+ printf("\n");
+}
+
+/*
+ * Reset the printer, then wait until it's selected and not busy.
+ */
+int
+lptopen(dev, flag, mode, p)
+ dev_t dev;
+ int flag, mode;
+ struct proc *p;
+{
+ int unit = LPTUNIT(dev);
+ u_char flags = LPTFLAGS(dev);
+ struct lpt_softc *sc;
+ int error;
+ int spin;
+ int sps;
+
+ if (unit >= lpt_cd.cd_ndevs)
+ return ENXIO;
+ sc = lpt_cd.cd_devs[unit];
+ if (!sc)
+ return ENXIO;
+
+#ifdef DIAGNOSTIC
+ if (sc->sc_state)
+ printf("%s: stat=0x%x not zero\n", sc->sc_dev.dv_xname,
+ sc->sc_state);
+#endif
+
+ if (sc->sc_state)
+ return EBUSY;
+
+ sc->sc_state = LPT_INIT;
+ sc->sc_flags = flags;
+ lprintf("%s: open: flags=0x%x\n", sc->sc_dev.dv_xname, flags);
+
+ /* wait till ready (printer running diagnostics) */
+ for (spin = 0; NOT_READY(); spin += STEP) {
+ if (spin >= TIMEOUT) {
+ sc->sc_state = 0;
+ return EBUSY;
+ }
+
+ /* wait 1/4 second, give up if we get a signal */
+ if (error = tsleep((caddr_t)sc, LPTPRI | PCATCH, "lptopen",
+ STEP) != EWOULDBLOCK) {
+ sc->sc_state = 0;
+ return error;
+ }
+ }
+
+ sc->sc_inbuf = geteblk(LPT_BSIZE);
+ sc->sc_count = 0;
+ sc->sc_state = LPT_OPEN;
+
+ if ((sc->sc_flags & LPT_NOINTR) == 0) {
+ lptwakeup(sc);
+
+ sps = splhigh();
+ MFP->mf_imrb |= IB_PBSY;
+ MFP->mf_ierb |= IB_PBSY;
+ splx(sps);
+ }
+
+ lprintf("%s: opened\n", sc->sc_dev.dv_xname);
+printf("ierb: %x, imrb:%x aer: %x, iprb: %x\n", MFP->mf_ierb,MFP->mf_imrb,
+ MFP->mf_aer, MFP->mf_iprb);
+ return 0;
+}
+
+void
+lptwakeup(arg)
+ void *arg;
+{
+ struct lpt_softc *sc = arg;
+ int s;
+
+ s = spltty();
+ lptintr();
+ splx(s);
+
+ timeout(lptwakeup, sc, STEP);
+}
+
+/*
+ * Close the device, and free the local line buffer.
+ */
+int
+lptclose(dev, flag, mode, p)
+ dev_t dev;
+ int flag;
+ int mode;
+ struct proc *p;
+{
+ int unit = LPTUNIT(dev);
+ struct lpt_softc *sc = lpt_cd.cd_devs[unit];
+ int sps;
+
+ if (sc->sc_count)
+ (void) pushbytes(sc);
+
+ if ((sc->sc_flags & LPT_NOINTR) == 0) {
+ untimeout(lptwakeup, sc);
+
+ sps = splhigh();
+ MFP->mf_ierb &= ~IB_PBSY;
+ MFP->mf_imrb &= ~IB_PBSY;
+ splx(sps);
+ }
+
+ sc->sc_state = 0;
+ brelse(sc->sc_inbuf);
+
+ lprintf("%s: closed\n", sc->sc_dev.dv_xname);
+ return 0;
+}
+
+int
+pushbytes(sc)
+ struct lpt_softc *sc;
+{
+ int error;
+
+ if (sc->sc_flags & LPT_NOINTR) {
+ int spin, tic;
+
+ while (sc->sc_count > 0) {
+ spin = 0;
+ while (NOT_READY()) {
+ if (++spin < sc->sc_spinmax)
+ continue;
+ tic = 0;
+ /* adapt busy-wait algorithm */
+ sc->sc_spinmax++;
+ while (NOT_READY()) {
+ /* exponential backoff */
+ tic = tic + tic + 1;
+ if (tic > TIMEOUT)
+ tic = TIMEOUT;
+ error = tsleep((caddr_t)sc,
+ LPTPRI | PCATCH, "lptpsh", tic);
+ if (error != EWOULDBLOCK)
+ return error;
+ }
+ break;
+ }
+
+ ym2149_write_ioport(YM_IOB, *sc->sc_cp++);
+ ym2149_strobe(0);
+ sc->sc_count--;
+ ym2149_strobe(1);
+
+ /* adapt busy-wait algorithm */
+ if (spin*2 + 16 < sc->sc_spinmax)
+ sc->sc_spinmax--;
+ }
+ } else {
+ int s;
+
+ while (sc->sc_count > 0) {
+ /* if the printer is ready for a char, give it one */
+ if ((sc->sc_state & LPT_OBUSY) == 0) {
+ lprintf("%s: write %d\n", sc->sc_dev.dv_xname,
+ sc->sc_count);
+ s = spltty();
+ (void) lptintr();
+ splx(s);
+ }
+ if (error = tsleep((caddr_t)sc, LPTPRI | PCATCH,
+ "lptwrite2", 0))
+ return error;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Copy a line from user space to a local buffer, then call putc to get the
+ * chars moved to the output queue.
+ */
+int
+lptwrite(dev, uio, flags)
+ dev_t dev;
+ struct uio *uio;
+ int flags;
+{
+ struct lpt_softc *sc = lpt_cd.cd_devs[LPTUNIT(dev)];
+ size_t n;
+ int error = 0;
+
+ while (n = min(LPT_BSIZE, uio->uio_resid)) {
+ uiomove(sc->sc_cp = sc->sc_inbuf->b_data, n, uio);
+ sc->sc_count = n;
+ error = pushbytes(sc);
+ if (error) {
+ /*
+ * Return accurate residual if interrupted or timed
+ * out.
+ */
+ uio->uio_resid += sc->sc_count;
+ sc->sc_count = 0;
+ return error;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Handle printer interrupts which occur when the printer is ready to accept
+ * another char.
+ */
+int
+lptintr()
+{
+ struct lpt_softc *sc;
+
+ sc = lpt_cd.cd_devs[0]; /* XXX: LWP - we have only one on the Atari */
+
+ /* is printer online and ready for output */
+ if (NOT_READY())
+ return 0;
+
+ if (sc->sc_count) {
+
+ /* send char */
+ ym2149_write_ioport(YM_IOB, *sc->sc_cp++);
+ ym2149_strobe(0);
+ sc->sc_count--;
+ ym2149_strobe(1);
+ sc->sc_state |= LPT_OBUSY;
+ } else
+ sc->sc_state &= ~LPT_OBUSY;
+
+ if (sc->sc_count == 0) {
+ /* none, wake up the top half to get more */
+ wakeup((caddr_t)sc);
+ }
+
+ return 1;
+}
+
+int
+lptioctl(dev, cmd, data, flag, p)
+ dev_t dev;
+ u_long cmd;
+ caddr_t data;
+ int flag;
+ struct proc *p;
+{
+ int error = 0;
+
+ switch (cmd) {
+ default:
+ error = ENODEV;
+ }
+
+ return error;
+}