Import an Open Firmware I2C bus module. This attaches firmware device tree
indicated I2C devices, and provides an ofw_bus interface for driver probing. This should be MI, but is currently provided only on PowerPC due to lack of sparc64 hardware with an I2C controller. Discussed on: freebsd-arch
This commit is contained in:
Nathan Whitehorn
parent
4532d2224b
commit
3bb481ffb0
@ -34,6 +34,7 @@ dev/ofw/ofw_if.m optional aim
|
||||
dev/ofw/ofw_bus_subr.c optional aim
|
||||
dev/ofw/ofw_console.c optional aim
|
||||
dev/ofw/ofw_disk.c optional ofwd aim
|
||||
dev/ofw/ofw_iicbus.c optional iicbus aim
|
||||
dev/ofw/ofw_standard.c optional aim
|
||||
dev/powermac_nvram/powermac_nvram.c optional powermac_nvram powermac
|
||||
dev/quicc/quicc_bfe_ocp.c optional quicc mpc85xx
|
||||
|
||||
@ -268,3 +268,5 @@ driver_t iicbus_driver = {
|
||||
devclass_t iicbus_devclass;
|
||||
|
||||
MODULE_VERSION(iicbus, IICBUS_MODVER);
|
||||
DRIVER_MODULE(iicbus, iichb, iicbus_driver, iicbus_devclass, 0, 0);
|
||||
|
||||
|
||||
183
sys/dev/ofw/ofw_iicbus.c
Normal file
183
sys/dev/ofw/ofw_iicbus.c
Normal file
@ -0,0 +1,183 @@
|
||||
/*-
|
||||
* Copyright (c) 2009, Nathan Whitehorn <nwhitehorn@FreeBSD.org>
|
||||
* 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 unmodified, 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 <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 <sys/mutex.h>
|
||||
|
||||
#include <dev/iicbus/iicbus.h>
|
||||
#include <dev/iicbus/iiconf.h>
|
||||
#include <dev/ofw/ofw_bus.h>
|
||||
#include <dev/ofw/ofw_bus_subr.h>
|
||||
#include <dev/ofw/openfirm.h>
|
||||
|
||||
#include "iicbus_if.h"
|
||||
|
||||
/* Methods */
|
||||
static device_probe_t ofw_iicbus_probe;
|
||||
static device_attach_t ofw_iicbus_attach;
|
||||
static device_t ofw_iicbus_add_child(device_t dev, int order, const char *name,
|
||||
int unit);
|
||||
static const struct ofw_bus_devinfo *ofw_iicbus_get_devinfo(device_t bus,
|
||||
device_t dev);
|
||||
|
||||
static device_method_t ofw_iicbus_methods[] = {
|
||||
/* Device interface */
|
||||
DEVMETHOD(device_probe, ofw_iicbus_probe),
|
||||
DEVMETHOD(device_attach, ofw_iicbus_attach),
|
||||
|
||||
/* Bus interface */
|
||||
DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
|
||||
DEVMETHOD(bus_add_child, ofw_iicbus_add_child),
|
||||
|
||||
/* ofw_bus interface */
|
||||
DEVMETHOD(ofw_bus_get_devinfo, ofw_iicbus_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),
|
||||
|
||||
{ 0, 0 }
|
||||
};
|
||||
|
||||
struct ofw_iicbus_devinfo {
|
||||
struct iicbus_ivar opd_dinfo;
|
||||
struct ofw_bus_devinfo opd_obdinfo;
|
||||
};
|
||||
|
||||
static devclass_t ofwiicbus_devclass;
|
||||
|
||||
DEFINE_CLASS_1(iicbus, ofw_iicbus_driver, ofw_iicbus_methods, 1 /* no softc */,
|
||||
iicbus_driver);
|
||||
DRIVER_MODULE(ofw_iicbus, iichb, ofw_iicbus_driver, ofwiicbus_devclass, 0, 0);
|
||||
MODULE_VERSION(ofw_iicbus, 1);
|
||||
MODULE_DEPEND(ofw_iicbus, iicbus, 1, 1, 1);
|
||||
|
||||
static int
|
||||
ofw_iicbus_probe(device_t dev)
|
||||
{
|
||||
|
||||
if (ofw_bus_get_node(dev) == 0)
|
||||
return (ENXIO);
|
||||
device_set_desc(dev, "OFW I2C bus");
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
ofw_iicbus_attach(device_t dev)
|
||||
{
|
||||
struct iicbus_softc *sc = IICBUS_SOFTC(dev);
|
||||
struct ofw_iicbus_devinfo *dinfo;
|
||||
phandle_t node, child;
|
||||
device_t childdev;
|
||||
uint32_t addr;
|
||||
|
||||
sc->dev = dev;
|
||||
mtx_init(&sc->lock, "iicbus", NULL, MTX_DEF);
|
||||
iicbus_reset(dev, IIC_FASTEST, 0, NULL);
|
||||
|
||||
bus_generic_probe(dev);
|
||||
bus_enumerate_hinted_children(dev);
|
||||
|
||||
/*
|
||||
* Attach those children represented in the device tree.
|
||||
*/
|
||||
|
||||
node = ofw_bus_get_node(dev);
|
||||
|
||||
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
|
||||
if (OF_getprop(child, "reg", &addr, sizeof(addr)) == -1)
|
||||
continue;
|
||||
|
||||
/*
|
||||
* Now set up the I2C and OFW bus layer devinfo and add it
|
||||
* to the bus.
|
||||
*/
|
||||
|
||||
dinfo = malloc(sizeof(struct ofw_iicbus_devinfo), M_DEVBUF,
|
||||
M_NOWAIT | M_ZERO);
|
||||
if (dinfo == NULL)
|
||||
continue;
|
||||
dinfo->opd_dinfo.addr = addr;
|
||||
if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) !=
|
||||
0) {
|
||||
free(dinfo, M_DEVBUF);
|
||||
continue;
|
||||
}
|
||||
childdev = device_add_child(dev, NULL, -1);
|
||||
device_set_ivars(childdev, dinfo);
|
||||
}
|
||||
|
||||
return (bus_generic_attach(dev));
|
||||
}
|
||||
|
||||
static device_t
|
||||
ofw_iicbus_add_child(device_t dev, int order, const char *name, int unit)
|
||||
{
|
||||
device_t child;
|
||||
struct ofw_iicbus_devinfo *devi;
|
||||
|
||||
child = device_add_child_ordered(dev, order, name, unit);
|
||||
if (child == NULL)
|
||||
return (child);
|
||||
devi = malloc(sizeof(struct ofw_iicbus_devinfo), M_DEVBUF,
|
||||
M_NOWAIT | M_ZERO);
|
||||
if (devi == NULL) {
|
||||
device_delete_child(dev, child);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* NULL all the OFW-related parts of the ivars for non-OFW children */
|
||||
|
||||
devi->opd_obdinfo.obd_node = -1;
|
||||
devi->opd_obdinfo.obd_name = NULL;
|
||||
devi->opd_obdinfo.obd_compat = NULL;
|
||||
devi->opd_obdinfo.obd_type = NULL;
|
||||
devi->opd_obdinfo.obd_model = NULL;
|
||||
|
||||
device_set_ivars(child, devi);
|
||||
|
||||
return (child);
|
||||
}
|
||||
|
||||
static const struct ofw_bus_devinfo *
|
||||
ofw_iicbus_get_devinfo(device_t bus, device_t dev)
|
||||
{
|
||||
struct ofw_iicbus_devinfo *dinfo;
|
||||
|
||||
dinfo = device_get_ivars(dev);
|
||||
return (&dinfo->opd_obdinfo);
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user