Source-Changes-HG archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
[src/trunk]: src/sys/dev/isa wsdisplay device driver for the 4x40 text-mode L...
details: https://anonhg.NetBSD.org/src/rev/9b7313304254
branches: trunk
changeset: 583599:9b7313304254
user: joff <joff%NetBSD.org@localhost>
date: Sun Aug 14 04:15:18 2005 +0000
description:
wsdisplay device driver for the 4x40 text-mode LCD on the NetBSD/toaster
diffstat:
sys/dev/isa/toasterlcd.c | 256 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 256 insertions(+), 0 deletions(-)
diffs (260 lines):
diff -r 750de31b76a7 -r 9b7313304254 sys/dev/isa/toasterlcd.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/isa/toasterlcd.c Sun Aug 14 04:15:18 2005 +0000
@@ -0,0 +1,256 @@
+/* $NetBSD: toasterlcd.c,v 1.1 2005/08/14 04:15:18 joff Exp $ */
+
+/*-
+ * Copyright (c) 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jesse Off.
+ *
+ * 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 product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: toasterlcd.c,v 1.1 2005/08/14 04:15:18 joff Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/poll.h>
+#include <sys/conf.h>
+#include <sys/uio.h>
+#include <sys/types.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/callout.h>
+#include <sys/select.h>
+#include <sys/conf.h>
+
+#include <machine/bus.h>
+#include <machine/autoconf.h>
+
+#include <dev/wscons/wsdisplayvar.h>
+#include <dev/wscons/wsconsio.h>
+#include <dev/wscons/wscons_callbacks.h>
+
+#include <dev/ic/hd44780reg.h>
+#include <dev/ic/hd44780var.h>
+#include <dev/isa/tsdiovar.h>
+#include <dev/isa/tsdioreg.h>
+
+struct toasterlcd_softc {
+ struct device sc_dev;
+ struct hd44780_chip sc_hlcd;
+ bus_space_tag_t sc_iot;
+ bus_space_handle_t sc_gpioh;
+};
+
+static int toasterlcd_match(struct device *, struct cfdata *, void *);
+static void toasterlcd_attach(struct device *, struct device *, void *);
+
+static void toasterlcd_writereg(struct hd44780_chip *, u_int32_t, u_int32_t, u_int8_t);
+static u_int8_t toasterlcd_readreg(struct hd44780_chip *, u_int32_t, u_int32_t);
+
+extern const struct wsdisplay_emulops hlcd_emulops;
+extern const struct wsdisplay_accessops hlcd_accessops;
+extern struct cfdriver toasterlcd_cd;
+
+CFATTACH_DECL(toasterlcd, sizeof(struct toasterlcd_softc),
+ toasterlcd_match, toasterlcd_attach, NULL, NULL);
+
+static const struct wsscreen_descr toasterlcd_stdscreen = {
+ "std_toasterlcd", 40, 4,
+ &hlcd_emulops,
+ 5, 7,
+ 0,
+};
+
+static const struct wsscreen_descr *_toasterlcd_scrlist[] = {
+ &toasterlcd_stdscreen,
+};
+
+static const struct wsscreen_list toasterlcd_screenlist = {
+ sizeof(_toasterlcd_scrlist) / sizeof(struct wsscreen_descr *),
+ _toasterlcd_scrlist,
+};
+
+static int
+toasterlcd_match(parent, match, aux)
+ struct device *parent;
+ struct cfdata *match;
+ void *aux;
+{
+ return 1;
+}
+
+#define TSDIO_GET(x) bus_space_read_1(sc->sc_iot, sc->sc_gpioh, \
+ (TSDIO_ ## x))
+
+#define TSDIO_SET(x, y) bus_space_write_1(sc->sc_iot, sc->sc_gpioh, \
+ (TSDIO_ ## x), (y))
+
+#define TSDIO_SETBITS(x, y) bus_space_write_1(sc->sc_iot, sc->sc_gpioh, \
+ (TSDIO_ ## x), TSDIO_GET(x) | (y))
+
+#define TSDIO_CLEARBITS(x, y) bus_space_write_1(sc->sc_iot, sc->sc_gpioh, \
+ (TSDIO_ ## x), TSDIO_GET(x) & (~(y)))
+
+static void
+toasterlcd_attach(parent, self, aux)
+ struct device *parent;
+ struct device *self;
+ void *aux;
+{
+ struct toasterlcd_softc *sc = (void *)self;
+ struct tsdio_attach_args *taa = aux;
+ struct wsemuldisplaydev_attach_args waa;
+
+ sc->sc_iot = taa->ta_iot;
+ sc->sc_gpioh = taa->ta_ioh;
+
+ sc->sc_hlcd.sc_dev_ok = 1;
+ sc->sc_hlcd.sc_cols = 40;
+ sc->sc_hlcd.sc_vcols = 40;
+ sc->sc_hlcd.sc_flags = HD_8BIT | HD_MULTILINE | HD_MULTICHIP;
+ sc->sc_hlcd.sc_dev = self;
+
+ sc->sc_hlcd.sc_writereg = toasterlcd_writereg;
+ sc->sc_hlcd.sc_readreg = toasterlcd_readreg;
+
+ TSDIO_SETBITS(DDR, 0x2); /* Port B as outputs */
+ TSDIO_CLEARBITS(DDR, 0x1); /* Port C as inputs */
+ TSDIO_CLEARBITS(PBDR, 0xd); /* De-assert EN, De-assert RS */
+
+ aprint_normal(": 4x40 text-mode hd44780 LCD\n");
+ aprint_normal("%s: using port C, bits 0-7 as DB0-DB7\n", sc->sc_dev.dv_xname);
+ aprint_normal("%s: using port B, bits 0-3 as RS, WR, EN1, EN2\n", sc->sc_dev.dv_xname);
+
+ hd44780_attach_subr(&sc->sc_hlcd);
+
+ waa.console = 0;
+ waa.scrdata = &toasterlcd_screenlist;
+ waa.accessops = &hlcd_accessops;
+ waa.accesscookie = &sc->sc_hlcd.sc_screen;
+ config_found(self, &waa, wsemuldisplaydevprint);
+}
+
+static void
+toasterlcd_writereg(hd, en, rs, cmd)
+ struct hd44780_chip *hd;
+ u_int32_t en, rs;
+ u_int8_t cmd;
+{
+ struct toasterlcd_softc *sc = (struct toasterlcd_softc *)hd->sc_dev;
+ u_int8_t ctrl;
+
+ if (hd->sc_dev_ok == 0)
+ return;
+
+ /* Step 1: Apply RS & WR, Send data */
+ ctrl = TSDIO_GET(PBDR);
+ TSDIO_SETBITS(DDR, 0x1); /* set port C to outputs */
+ TSDIO_SET(PCDR, cmd);
+ if (rs) {
+ ctrl |= 0x1; /* assert RS */
+ ctrl &= ~0x2; /* assert WR */
+ } else {
+ ctrl &= ~0x3; /* assert WR, de-assert RS */
+ }
+ TSDIO_SET(PBDR, ctrl);
+
+ /* Step 2: setup time delay */
+ delay(1);
+
+ /* Step 3: assert EN */
+ if (en == 1) ctrl |= 0x8;
+ else ctrl |= 0x4;
+ TSDIO_SET(PBDR, ctrl);
+
+ /* Step 4: pulse time delay */
+ delay(1);
+
+ /* Step 5: de-assert EN */
+ if (en == 1) ctrl &= ~0x8;
+ else ctrl &= ~0x4;
+ TSDIO_SET(PBDR, ctrl);
+
+ /* Step 6: hold time delay */
+ delay(1);
+
+ /* Step 7: de-assert WR */
+ ctrl |= 0x2;
+ TSDIO_SET(PBDR, ctrl);
+
+ /* Step 8: minimum delay till next bus-cycle */
+ delay(1000);
+}
+
+static u_int8_t
+toasterlcd_readreg(hd, en, rs)
+ struct hd44780_chip *hd;
+ u_int32_t en, rs;
+{
+ struct toasterlcd_softc *sc = (struct toasterlcd_softc *)hd->sc_dev;
+ u_int8_t ret, ctrl;
+
+ if (hd->sc_dev_ok == 0)
+ return 0;
+
+ /* Step 1: Apply RS & WR, Send data */
+ ctrl = TSDIO_GET(PBDR);
+ TSDIO_CLEARBITS(DDR, 0x1); /* set port C to inputs */
+ if (rs) {
+ ctrl |= 0x3; /* de-assert WR, assert RS */
+ } else {
+ ctrl |= 0x2; /* de-assert WR */
+ ctrl &= ~0x1; /* de-assert RS */
+ }
+ TSDIO_SET(PBDR, ctrl);
+
+ /* Step 2: setup time delay */
+ delay(1);
+
+ /* Step 3: assert EN */
+ if (en == 1) ctrl |= 0x8;
+ else ctrl |= 0x4;
+ TSDIO_SET(PBDR, ctrl);
+
+ /* Step 4: pulse time delay */
+ delay(1);
+
+ /* Step 5: de-assert EN */
+ ret = TSDIO_GET(PCDR) & 0xff;
+ if (en == 1) ctrl &= ~0x8;
+ else ctrl &= ~0x4;
+ TSDIO_SET(PBDR, ctrl);
+
+ /* Step 6: hold time delay + min bus cycle interval*/
+ delay(1000);
+ return ret;
+}
+
Home |
Main Index |
Thread Index |
Old Index