svn commit: r349130 - in head/sys: conf dev/pwm modules/pwm/pwmbus
Ian Lepore
ian at FreeBSD.org
Mon Jun 17 03:32:07 UTC 2019
Author: ian
Date: Mon Jun 17 03:32:05 2019
New Revision: 349130
URL: https://svnweb.freebsd.org/changeset/base/349130
Log:
Add ofw_pwmbus to enumerate pwmbus devices on systems configured with fdt
data. Also, add fdt support to pwmc.
Added:
head/sys/dev/pwm/ofw_pwmbus.c (contents, props changed)
Modified:
head/sys/conf/files
head/sys/dev/pwm/pwmbus.c
head/sys/dev/pwm/pwmbus.h
head/sys/dev/pwm/pwmc.c
head/sys/modules/pwm/pwmbus/Makefile
Modified: head/sys/conf/files
==============================================================================
--- head/sys/conf/files Mon Jun 17 01:58:25 2019 (r349129)
+++ head/sys/conf/files Mon Jun 17 03:32:05 2019 (r349130)
@@ -2704,6 +2704,7 @@ dev/pwm/pwmc.c optional pwm | pwmc
dev/pwm/pwmbus.c optional pwm | pwmbus
dev/pwm/pwmbus_if.m optional pwm | pwmbus
dev/pwm/ofw_pwm.c optional pwm fdt | pwmbus fdt
+dev/pwm/ofw_pwmbus.c optional pwm fdt | pwmbus fdt
dev/quicc/quicc_core.c optional quicc
dev/ral/rt2560.c optional ral
dev/ral/rt2661.c optional ral
Added: head/sys/dev/pwm/ofw_pwmbus.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/pwm/ofw_pwmbus.c Mon Jun 17 03:32:05 2019 (r349130)
@@ -0,0 +1,223 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2019 Ian Lepore <ian at FreeBSD.org>
+ *
+ * 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 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 AUTHOR 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>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/libkern.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/pwm/pwmbus.h>
+
+#include "pwmbus_if.h"
+
+struct ofw_pwmbus_ivars {
+ struct pwmbus_ivars base;
+ struct ofw_bus_devinfo devinfo;
+};
+
+struct ofw_pwmbus_softc {
+ struct pwmbus_softc base;
+};
+
+/*
+ * bus_if methods...
+ */
+
+static device_t
+ofw_pwmbus_add_child(device_t dev, u_int order, const char *name, int unit)
+{
+ device_t child;
+ struct ofw_pwmbus_ivars *ivars;
+
+ if ((ivars = malloc(sizeof(struct ofw_pwmbus_ivars), M_DEVBUF,
+ M_NOWAIT | M_ZERO)) == NULL) {
+ return (NULL);
+ }
+
+ if ((child = device_add_child_ordered(dev, order, name, unit)) == NULL) {
+ free(ivars, M_DEVBUF);
+ return (NULL);
+ }
+
+ ivars->devinfo.obd_node = -1;
+ device_set_ivars(child, ivars);
+
+ return (child);
+}
+
+static void
+ofw_pwmbus_child_deleted(device_t dev, device_t child)
+{
+ struct ofw_pwmbus_ivars *ivars;
+
+ ivars = device_get_ivars(child);
+ if (ivars != NULL) {
+ ofw_bus_gen_destroy_devinfo(&ivars->devinfo);
+ free(ivars, M_DEVBUF);
+ }
+}
+
+static const struct ofw_bus_devinfo *
+ofw_pwmbus_get_devinfo(device_t bus, device_t dev)
+{
+ struct ofw_pwmbus_ivars *ivars;
+
+ ivars = device_get_ivars(dev);
+ return (&ivars->devinfo);
+}
+
+/*
+ * device_if methods...
+ */
+
+static int
+ofw_pwmbus_probe(device_t dev)
+{
+
+ if (ofw_bus_get_node(dev) == -1) {
+ return (ENXIO);
+ }
+ device_set_desc(dev, "OFW PWM bus");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+ofw_pwmbus_attach(device_t dev)
+{
+ struct ofw_pwmbus_softc *sc;
+ struct ofw_pwmbus_ivars *ivars;
+ phandle_t node;
+ device_t child, parent;
+ pcell_t chan;
+ bool any_children;
+
+ sc = device_get_softc(dev);
+ sc->base.dev = dev;
+ parent = device_get_parent(dev);
+
+ if (PWMBUS_CHANNEL_COUNT(parent, &sc->base.nchannels) != 0 ||
+ sc->base.nchannels == 0) {
+ device_printf(dev, "No channels on parent %s\n",
+ device_get_nameunit(parent));
+ return (ENXIO);
+ }
+
+ /*
+ * Attach the children found in the fdt node of the hardware controller.
+ * Hardware controllers must implement the ofw_bus_get_node method so
+ * that our call to ofw_bus_get_node() gets back the controller's node.
+ */
+ any_children = false;
+ node = ofw_bus_get_node(dev);
+ for (node = OF_child(node); node != 0; node = OF_peer(node)) {
+ /*
+ * The child has to have a reg property; its value is the
+ * channel number so range-check it.
+ */
+ if (OF_getencprop(node, "reg", &chan, sizeof(chan)) == -1)
+ continue;
+ if (chan >= sc->base.nchannels)
+ continue;
+
+ if ((child = ofw_pwmbus_add_child(dev, 0, NULL, -1)) == NULL)
+ continue;
+
+ ivars = device_get_ivars(child);
+ ivars->base.pi_channel = chan;
+
+ /* Set up the standard ofw devinfo. */
+ if (ofw_bus_gen_setup_devinfo(&ivars->devinfo, node) != 0) {
+ device_delete_child(dev, child);
+ continue;
+ }
+ any_children = true;
+ }
+
+ /*
+ * If we didn't find any children in the fdt data, add a pwmc(4) child
+ * for each channel, like the base pwmbus does. The idea is that if
+ * there is any fdt data, then we do exactly what it says and nothing
+ * more, otherwise we just provide generic userland access to all the
+ * pwm channels that exist like the base pwmbus's attach code does.
+ */
+ if (!any_children) {
+ for (chan = 0; chan < sc->base.nchannels; ++chan) {
+ child = ofw_pwmbus_add_child(dev, 0, "pwmc", -1);
+ if (child == NULL) {
+ device_printf(dev, "failed to add pwmc child "
+ " device for channel %u\n", chan);
+ continue;
+ }
+ ivars = device_get_ivars(child);
+ ivars->base.pi_channel = chan;
+ }
+ }
+ bus_enumerate_hinted_children(dev);
+ bus_generic_probe(dev);
+
+ return (bus_generic_attach(dev));
+}
+
+static device_method_t ofw_pwmbus_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, ofw_pwmbus_probe),
+ DEVMETHOD(device_attach, ofw_pwmbus_attach),
+
+ /* Bus interface */
+ DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
+ DEVMETHOD(bus_add_child, ofw_pwmbus_add_child),
+ DEVMETHOD(bus_child_deleted, ofw_pwmbus_child_deleted),
+
+ /* ofw_bus interface */
+ DEVMETHOD(ofw_bus_get_devinfo, ofw_pwmbus_get_devinfo),
+ DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
+ DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
+ DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
+ DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
+ DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
+
+ DEVMETHOD_END
+};
+
+devclass_t ofw_pwmbus_devclass;
+
+DEFINE_CLASS_1(pwmbus, ofw_pwmbus_driver, ofw_pwmbus_methods,
+ sizeof(struct pwmbus_softc), pwmbus_driver);
+EARLY_DRIVER_MODULE(ofw_pwmbus, pwm, ofw_pwmbus_driver, ofw_pwmbus_devclass,
+ 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
+MODULE_VERSION(ofw_pwmbus, 1);
+MODULE_DEPEND(ofw_pwmbus, pwmbus, 1, 1, 1);
Modified: head/sys/dev/pwm/pwmbus.c
==============================================================================
--- head/sys/dev/pwm/pwmbus.c Mon Jun 17 01:58:25 2019 (r349129)
+++ head/sys/dev/pwm/pwmbus.c Mon Jun 17 03:32:05 2019 (r349130)
@@ -44,11 +44,6 @@ __FBSDID("$FreeBSD$");
#include "pwmbus_if.h"
-struct pwmbus_softc {
- device_t dev;
- u_int nchannels;
-};
-
/*
* bus_if methods...
*/
Modified: head/sys/dev/pwm/pwmbus.h
==============================================================================
--- head/sys/dev/pwm/pwmbus.h Mon Jun 17 01:58:25 2019 (r349129)
+++ head/sys/dev/pwm/pwmbus.h Mon Jun 17 03:32:05 2019 (r349130)
@@ -30,6 +30,11 @@
#ifndef _PWMBUS_H_
#define _PWMBUS_H_
+struct pwmbus_softc {
+ device_t dev;
+ u_int nchannels;
+};
+
struct pwmbus_ivars {
u_int pi_channel;
};
@@ -53,6 +58,12 @@ pwmbus_set_ ## A(device_t dev, T t) \
}
PWMBUS_ACCESSOR(channel, CHANNEL, u_int)
+
+#ifdef FDT
+#define PWMBUS_FDT_PNP_INFO(t) FDTCOMPAT_PNP_INFO(t, pwmbus)
+#else
+#define PWMBUS_FDT_PNP_INFO(t)
+#endif
extern driver_t pwmbus_driver;
extern devclass_t pwmbus_devclass;
Modified: head/sys/dev/pwm/pwmc.c
==============================================================================
--- head/sys/dev/pwm/pwmc.c Mon Jun 17 01:58:25 2019 (r349129)
+++ head/sys/dev/pwm/pwmc.c Mon Jun 17 03:32:05 2019 (r349130)
@@ -29,6 +29,8 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
+#include "opt_platform.h"
+
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
@@ -42,6 +44,20 @@ __FBSDID("$FreeBSD$");
#include "pwmbus_if.h"
+#ifdef FDT
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+static struct ofw_compat_data compat_data[] = {
+ {"freebsd,pwmc", true},
+ {NULL, false},
+};
+
+PWMBUS_FDT_PNP_INFO(compat_data);
+
+#endif
+
struct pwmc_softc {
device_t dev;
struct cdev *cdev;
@@ -98,12 +114,52 @@ static struct cdevsw pwm_cdevsw = {
.d_ioctl = pwm_ioctl
};
+#ifdef FDT
+
+static void
+pwmc_setup_label(struct pwmc_softc *sc)
+{
+ void *label;
+
+ if (OF_getprop_alloc(ofw_bus_get_node(sc->dev), "label", &label) > 0) {
+ make_dev_alias(sc->cdev, "pwm/%s", (char *)label);
+ OF_prop_free(label);
+ }
+}
+
+#else /* FDT */
+
+static void
+pwmc_setup_label(struct pwmc_softc *sc)
+{
+ char *label;
+
+ if (resource_string_value(device_get_name(sc->dev),
+ device_get_unit(sc->dev), "label", &label) == 0) {
+ make_dev_alias(sc->cdev, "pwm/%s", label);
+ }
+}
+
+#endif /* FDT */
+
static int
pwmc_probe(device_t dev)
{
+ int rv;
+ rv = BUS_PROBE_NOWILDCARD;
+
+#ifdef FDT
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
+ rv = BUS_PROBE_DEFAULT;
+ }
+#endif
+
device_set_desc(dev, "PWM Control");
- return (BUS_PROBE_NOWILDCARD);
+ return (rv);
}
static int
@@ -111,7 +167,6 @@ pwmc_attach(device_t dev)
{
struct pwmc_softc *sc;
struct make_dev_args args;
- const char *label;
int error;
sc = device_get_softc(dev);
@@ -134,11 +189,7 @@ pwmc_attach(device_t dev)
return (error);
}
- /* If there is a label hint, create an alias with that name. */
- if (resource_string_value(device_get_name(dev), device_get_unit(dev),
- "label", &label) == 0) {
- make_dev_alias(sc->cdev, "pwm/%s", label);
- }
+ pwmc_setup_label(sc);
return (0);
}
Modified: head/sys/modules/pwm/pwmbus/Makefile
==============================================================================
--- head/sys/modules/pwm/pwmbus/Makefile Mon Jun 17 01:58:25 2019 (r349129)
+++ head/sys/modules/pwm/pwmbus/Makefile Mon Jun 17 03:32:05 2019 (r349130)
@@ -6,7 +6,7 @@ KMOD= pwmbus
SRCS= pwmbus.c
.if !empty(OPT_FDT)
-SRCS+= ofw_pwm.c ofw_bus_if.h
+SRCS+= ofw_pwm.c ofw_pwmbus.c ofw_bus_if.h
.endif
# Generated files...
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