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[src/trunk]: src Add an example "gpioirq" driver that demonstrat...
details: https://anonhg.NetBSD.org/src/rev/8789b0d9bfde
branches: trunk
changeset: 319168:8789b0d9bfde
user: thorpej <thorpej%NetBSD.org@localhost>
date: Sat May 19 14:15:39 2018 +0000
description:
Add an example "gpioirq" driver that demonstrates interrupts on GPIO
pins. Will be enhanced in the future to support sending events to
user space on edge-triggered interrupt events.
Based on initial work by Brad Spencer.
PR kern/51676
diffstat:
distrib/sets/lists/man/mi | 5 +-
distrib/sets/lists/modules/mi | 4 +-
share/man/man4/Makefile | 6 +-
share/man/man4/gpioirq.4 | 97 +++++++++++++++
sys/dev/gpio/files.gpio | 7 +-
sys/dev/gpio/gpioirq.c | 228 +++++++++++++++++++++++++++++++++++++
sys/modules/Makefile | 3 +-
sys/modules/gpioirq/Makefile | 13 ++
sys/modules/gpioirq/gpioirq.ioconf | 8 +
9 files changed, 364 insertions(+), 7 deletions(-)
diffs (truncated from 468 to 300 lines):
diff -r 1e9b8bdd59e8 -r 8789b0d9bfde distrib/sets/lists/man/mi
--- a/distrib/sets/lists/man/mi Sat May 19 14:11:30 2018 +0000
+++ b/distrib/sets/lists/man/mi Sat May 19 14:15:39 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.1586 2018/05/15 00:54:01 nat Exp $
+# $NetBSD: mi,v 1.1587 2018/05/19 14:15:39 thorpej Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@@ -1123,6 +1123,7 @@
./usr/share/man/cat4/gpioiic.0 man-sys-catman .cat
./usr/share/man/cat4/gpiolock.0 man-sys-catman .cat
./usr/share/man/cat4/gpioow.0 man-sys-catman .cat
+./usr/share/man/cat4/gpioirq.0 man-sys-catman .cat
./usr/share/man/cat4/gpiopwm.0 man-sys-catman .cat
./usr/share/man/cat4/gpiosim.0 man-sys-catman .cat
./usr/share/man/cat4/gre.0 man-sys-catman .cat
@@ -4263,6 +4264,7 @@
./usr/share/man/html4/gpioiic.html man-sys-htmlman html
./usr/share/man/html4/gpiolock.html man-sys-htmlman html
./usr/share/man/html4/gpioow.html man-sys-htmlman html
+./usr/share/man/html4/gpioirq.html man-sys-htmlman html
./usr/share/man/html4/gpiopwm.html man-sys-htmlman html
./usr/share/man/html4/gpiosim.html man-sys-htmlman html
./usr/share/man/html4/gre.html man-sys-htmlman html
@@ -7177,6 +7179,7 @@
./usr/share/man/man4/gpioiic.4 man-sys-man .man
./usr/share/man/man4/gpiolock.4 man-sys-man .man
./usr/share/man/man4/gpioow.4 man-sys-man .man
+./usr/share/man/man4/gpioirq.4 man-sys-man .man
./usr/share/man/man4/gpiopwm.4 man-sys-man .man
./usr/share/man/man4/gpiosim.4 man-sys-man .man
./usr/share/man/man4/gre.4 man-sys-man .man
diff -r 1e9b8bdd59e8 -r 8789b0d9bfde distrib/sets/lists/modules/mi
--- a/distrib/sets/lists/modules/mi Sat May 19 14:11:30 2018 +0000
+++ b/distrib/sets/lists/modules/mi Sat May 19 14:15:39 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.114 2018/01/09 03:31:14 christos Exp $
+# $NetBSD: mi,v 1.115 2018/05/19 14:15:39 thorpej Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@@ -132,6 +132,8 @@
./@MODULEDIR@/gpio/gpio.kmod base-kernel-modules kmod
./@MODULEDIR@/gpioiic base-kernel-modules kmod
./@MODULEDIR@/gpioiic/gpioiic.kmod base-kernel-modules kmod
+./@MODULEDIR@/gpioirq base-kernel-modules kmod
+./@MODULEDIR@/gpioirq/gpioirq.kmod base-kernel-modules kmod
./@MODULEDIR@/gpioow base-kernel-modules kmod
./@MODULEDIR@/gpioow/gpioow.kmod base-kernel-modules kmod
./@MODULEDIR@/gpiosim base-kernel-modules kmod
diff -r 1e9b8bdd59e8 -r 8789b0d9bfde share/man/man4/Makefile
--- a/share/man/man4/Makefile Sat May 19 14:11:30 2018 +0000
+++ b/share/man/man4/Makefile Sat May 19 14:15:39 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.652 2018/05/09 08:22:53 msaitoh Exp $
+# $NetBSD: Makefile,v 1.653 2018/05/19 14:15:39 thorpej Exp $
# @(#)Makefile 8.1 (Berkeley) 6/18/93
MAN= aac.4 ac97.4 acardide.4 aceride.4 acphy.4 \
@@ -26,8 +26,8 @@
fast_ipsec.4 fd.4 filemon.4 finsio.4 flash.4 fpa.4 fms.4 fss.4 \
fujbp.4 full.4 fxp.4 \
gcscaudio.4 gem.4 genfb.4 gentbi.4 geodeide.4 \
- glxtphy.4 gpib.4 gpio.4 gpiolock.4 gpiopwm.4 gpiosim.4 gre.4 \
- gphyter.4 gsip.4 \
+ glxtphy.4 gpib.4 gpio.4 gpioirq.4 gpiolock.4 gpiopwm.4 \
+ gpiosim.4 gre.4 gphyter.4 gsip.4 \
hdaudio.4 hifn.4 hme.4 hpacel.4 hpqlb.4 hptide.4 hythygtemp.4 \
ibmcd.4 ibmhawk.4 ichsmb.4 icmp.4 icp.4 icsphy.4 iee.4 ieee80211.4 \
ifmedia.4 igmafb.4 igphy.4 igsfb.4 iha.4 ihidev.4 ihphy.4 iic.4 ims.4 \
diff -r 1e9b8bdd59e8 -r 8789b0d9bfde share/man/man4/gpioirq.4
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/share/man/man4/gpioirq.4 Sat May 19 14:15:39 2018 +0000
@@ -0,0 +1,97 @@
+.\" $NetBSD: gpioirq.4,v 1.1 2018/05/19 14:15:39 thorpej Exp $
+.\"
+.\" Copyright (c) 2016 Brad Spencer <brad%anduin.eldar.org@localhost>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd May 11, 2018
+.Dt GPIOIRQ 4
+.Os
+.Sh NAME
+.Nm gpioirq
+.Nd Install an interrupt handler on a GPIO pin
+.Sh SYNOPSIS
+.Cd "gpioirq* at gpio? offset 0 mask 0x1 flag 0x00"
+.Sh DESCRIPTION
+The
+.Nm
+driver attaches an interrupt handler to a single GPIO pin.
+.Pp
+The pin number is specified in the kernel configuration file with the
+.Ar offset
+locator.
+The
+.Ar mask
+locator should always be 0x1.
+.Pp
+The
+.Ar flag
+locator specifies the interrupt mode to use:
+.Bl -tag -width "XXXXXXXX"
+.It Dv 0x01
+Interrupt on the positive
+.Pq rising
+edge of the pin.
+.It Dv 0x02
+Interrupt on the negative
+.Pq falling
+edge of the pin.
+.It Dv 0x04
+Interrupt on both edges of the pin.
+.It Dv 0x08
+Assert the intrerrupt as long as the pin is high.
+.It Dv 0x10
+Assert the interrupt as long as the pin is low.
+.El
+.Pp
+Note that the interrupts modes are mutually-exclusive, and exactly one
+interrupt mode must be specified.
+These flags correspond to the
+.Dv GPIO_INTR
+mode bits defined in
+.Pa sys/gpio.h .
+In addition to the interrupt mode, setting
+.Dv 0x1000
+in
+.Ar flags
+will enable the printing of a message to the console whenever the
+interrupt handler is called.
+.Pp
+The
+.Ar offset ,
+.Ar mask ,
+and
+.Ar flag
+locators can also be specified when
+.Nm
+is attached at runtime using the
+.Dv GPIOATTACH
+.Xr ioctl 2
+on the
+.Xr gpio 4
+device.
+.Sh SEE ALSO
+.Xr gpio 4 ,
+.Xr drvctl 8 ,
+.Xr gpioctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Nx 9.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Brad Spencer Aq Mt brad%anduin.eldar.org@localhost
diff -r 1e9b8bdd59e8 -r 8789b0d9bfde sys/dev/gpio/files.gpio
--- a/sys/dev/gpio/files.gpio Sat May 19 14:11:30 2018 +0000
+++ b/sys/dev/gpio/files.gpio Sat May 19 14:15:39 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.gpio,v 1.14 2015/10/15 09:07:49 jmcneill Exp $
+# $NetBSD: files.gpio,v 1.15 2018/05/19 14:15:39 thorpej Exp $
define gpio {[offset = -1], [mask = 0], [flag = 0]}
@@ -39,3 +39,8 @@
device gpiobutton: gpiobus, sysmon_power, sysmon_taskq
attach gpiobutton at gpio
file dev/gpio/gpiobutton.c gpiobutton
+
+# GPIO interrupt example
+device gpioirq: gpiobus
+attach gpioirq at gpio
+file dev/gpio/gpioirq.c gpioirq
diff -r 1e9b8bdd59e8 -r 8789b0d9bfde sys/dev/gpio/gpioirq.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/gpio/gpioirq.c Sat May 19 14:15:39 2018 +0000
@@ -0,0 +1,228 @@
+/* $NetBSD: gpioirq.c,v 1.1 2018/05/19 14:15:39 thorpej Exp $ */
+
+/*
+ * Copyright (c) 2016 Brad Spencer <brad%anduin.eldar.org@localhost>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: gpioirq.c,v 1.1 2018/05/19 14:15:39 thorpej Exp $");
+
+/*
+ * Example GPIO driver that uses interrupts.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/gpio.h>
+#include <sys/module.h>
+
+#include <dev/gpio/gpiovar.h>
+
+#define GPIOIRQ_NPINS 1
+
+struct gpioirq_softc {
+ device_t sc_dev;
+ void * sc_gpio;
+ struct gpio_pinmap sc_map;
+ int _map[GPIOIRQ_NPINS];
+ char sc_intrstr[128];
+ void * sc_ih;
+ kmutex_t sc_lock;
+ bool sc_verbose;
+ bool sc_functional;
+};
+
+#define GPIOIRQ_FLAGS_IRQMODE GPIO_INTR_MODE_MASK
+#define GPIOIRQ_FLAGS_VERBOSE 0x1000
+
+static int gpioirq_match(device_t, cfdata_t, void *);
+static void gpioirq_attach(device_t, device_t, void *);
+static int gpioirq_detach(device_t, int);
+static int gpioirq_activate(device_t, enum devact);
+
+static int gpioirq_intr(void *);
+
+CFATTACH_DECL_NEW(gpioirq, sizeof(struct gpioirq_softc),
+ gpioirq_match, gpioirq_attach,
+ gpioirq_detach, gpioirq_activate);
+
+extern struct cfdriver gpioirq_cd;
+
+static int
+gpioirq_match(device_t parent, cfdata_t cf, void *aux)
+{
+ struct gpio_attach_args *ga = aux;
+ int npins;
+
+ if (strcmp(ga->ga_dvname, cf->cf_name))
+ return (0);
+
+ if (ga->ga_offset == -1)
+ return (0);
+
+ npins = gpio_npins(ga->ga_mask);
+ if (npins > 1)
+ return (0);
+
+ return (1);
+}
+
+static void
+gpioirq_attach(device_t parent, device_t self, void *aux)
+{
+ struct gpioirq_softc *sc = device_private(self);
+ struct gpio_attach_args *ga = aux;
+ int npins = gpio_npins(ga->ga_mask);
+ int irqmode, flags;
+
+ sc->sc_dev = self;
+
+ /* Map pins */
+ sc->sc_gpio = ga->ga_gpio;
+ sc->sc_map.pm_map = sc->_map;
+
+ /* We always map just 1 pin. */
+ if (gpio_pin_map(sc->sc_gpio, ga->ga_offset,
+ npins ? ga->ga_mask : 0x1, &sc->sc_map)) {
+ aprint_error(": can't map pins\n");
+ return;
+ }
+
+ aprint_normal("\n");
+
+ if (ga->ga_flags & GPIOIRQ_FLAGS_VERBOSE)
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