[src/trunk]: src/sys/dev/gpio Simple driver for gpio control of rf enable/dis...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/314716889b50
branches:  trunk
changeset: 338551:314716889b50
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Fri May 29 23:17:13 2015 +0000

description:
Simple driver for gpio control of rf enable/disable pins.

diffstat:

 sys/dev/gpio/files.gpio   |    7 +-
 sys/dev/gpio/gpiorfkill.c |  166 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 172 insertions(+), 1 deletions(-)

diffs (188 lines):

diff -r f9a472d7b7fa -r 314716889b50 sys/dev/gpio/files.gpio
--- a/sys/dev/gpio/files.gpio   Fri May 29 22:18:51 2015 +0000
+++ b/sys/dev/gpio/files.gpio   Fri May 29 23:17:13 2015 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.gpio,v 1.10 2011/11/13 12:33:00 mbalmer Exp $
+# $NetBSD: files.gpio,v 1.11 2015/05/29 23:17:13 jmcneill Exp $
 
 define gpio {[offset = -1], [mask = 0], [flag = 0]}
 
@@ -29,3 +29,8 @@
 device gpiopwm: gpiobus
 attach gpiopwm at gpio
 file   dev/gpio/gpiopwm.c                      gpiopwm
+
+# RF kill
+device gpiorfkill: gpiobus
+attach gpiorfkill at gpio
+file   dev/gpio/gpiorfkill.c                   gpiorfkill
diff -r f9a472d7b7fa -r 314716889b50 sys/dev/gpio/gpiorfkill.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/gpio/gpiorfkill.c Fri May 29 23:17:13 2015 +0000
@@ -0,0 +1,166 @@
+/* $NetBSD: gpiorfkill.c,v 1.1 2015/05/29 23:17:13 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "locators.h"
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: gpiorfkill.c,v 1.1 2015/05/29 23:17:13 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/intr.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+#include <sys/gpio.h>
+
+#include <dev/gpio/gpiovar.h>
+
+static int     gpiorfkill_match(device_t, cfdata_t, void *);
+static void    gpiorfkill_attach(device_t, device_t, void *);
+
+struct gpiorfkill_softc {
+       device_t                sc_dev;
+       void                    *sc_gpio;
+       struct gpio_pinmap      sc_map;
+       int                     sc_pinmap[1];
+
+       int                     sc_state;
+
+       struct sysctllog        *sc_sysctllog;
+       int                     sc_sysctlnode;
+};
+
+static void    gpiorfkill_enable(struct gpiorfkill_softc *, int);
+static void    gpiorfkill_sysctl_init(struct gpiorfkill_softc *);
+static int     gpiorfkill_enable_helper(SYSCTLFN_PROTO);
+
+CFATTACH_DECL_NEW(gpiorfkill, sizeof(struct gpiorfkill_softc),
+       gpiorfkill_match, gpiorfkill_attach, NULL, NULL);
+
+static int
+gpiorfkill_match(device_t parent, cfdata_t cf, void *aux)
+{
+       struct gpio_attach_args * const ga = aux;
+
+       if (strcmp(ga->ga_dvname, cf->cf_name) != 0)
+               return 0;
+
+       if (ga->ga_offset == -1 || gpio_npins(ga->ga_mask) != 1)
+               return 0;
+
+       return 1;
+}
+
+static void
+gpiorfkill_attach(device_t parent, device_t self, void *aux)
+{
+       struct gpiorfkill_softc * const sc = device_private(self);
+       struct gpio_attach_args * const ga = aux;
+       int caps;
+
+       sc->sc_dev = self;
+       sc->sc_gpio = ga->ga_gpio;
+       sc->sc_map.pm_map = sc->sc_pinmap;
+       if (gpio_pin_map(sc->sc_gpio, ga->ga_offset, ga->ga_mask,
+           &sc->sc_map)) {
+               aprint_error(": couldn't map pins\n");
+               return;
+       }
+
+       caps = gpio_pin_caps(sc->sc_gpio, &sc->sc_map, 0);
+       if ((caps & GPIO_PIN_OUTPUT) == 0) {
+               aprint_error(": pin is not an output pin\n");
+               return;
+       }
+
+       gpio_pin_ctl(sc->sc_gpio, &sc->sc_map, 0, GPIO_PIN_OUTPUT);
+
+       aprint_naive("\n");
+       aprint_normal("\n");
+
+       gpiorfkill_enable(sc, 1);
+       gpiorfkill_sysctl_init(sc);
+}
+
+static void
+gpiorfkill_enable(struct gpiorfkill_softc *sc, int enable)
+{
+       sc->sc_state = enable;
+       gpio_pin_write(sc->sc_gpio, &sc->sc_map, 0, sc->sc_state);
+}
+
+static void
+gpiorfkill_sysctl_init(struct gpiorfkill_softc *sc)
+{
+       const struct sysctlnode *node, *devnode;
+       int error;
+
+       error = sysctl_createv(&sc->sc_sysctllog, 0, NULL, &devnode,
+           0, CTLTYPE_NODE, device_xname(sc->sc_dev), NULL,
+           NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL);
+       if (error)
+               goto sysctl_failed;
+
+       error = sysctl_createv(&sc->sc_sysctllog, 0, &devnode, &node,
+           CTLFLAG_READWRITE, CTLTYPE_INT, "enable", NULL,
+           gpiorfkill_enable_helper, 0, (void *)sc, 0,
+           CTL_CREATE, CTL_EOL);
+       if (error)
+               goto sysctl_failed;
+       sc->sc_sysctlnode = node->sysctl_num;
+
+       return;
+
+sysctl_failed:
+       aprint_error_dev(sc->sc_dev, "couldn't create sysctl nodes (%d)\n",
+           error);
+       sysctl_teardown(&sc->sc_sysctllog);
+}
+
+static int
+gpiorfkill_enable_helper(SYSCTLFN_ARGS)
+{
+       struct gpiorfkill_softc *sc;
+       struct sysctlnode node;
+       int error, enable;
+
+       node = *rnode;
+       sc = node.sysctl_data;
+       enable = sc->sc_state;
+       node.sysctl_data = &enable;
+       error = sysctl_lookup(SYSCTLFN_CALL(&node));
+       if (error || newp == NULL)
+               return error;
+
+       enable = !!enable;
+       gpiorfkill_enable(sc, enable);
+
+       return 0;
+}