Date: Thu, 15 Jan 2009 02:46:43 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r187261 - in head/sys: conf dev/iicbus dev/ofw Message-ID: <200901150246.n0F2kh3x061044@svn.freebsd.org>
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Author: nwhitehorn Date: Thu Jan 15 02:46:43 2009 New Revision: 187261 URL: http://svn.freebsd.org/changeset/base/187261 Log: 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 Added: head/sys/dev/ofw/ofw_iicbus.c (contents, props changed) Modified: head/sys/conf/files.powerpc head/sys/dev/iicbus/iicbus.c Modified: head/sys/conf/files.powerpc ============================================================================== --- head/sys/conf/files.powerpc Thu Jan 15 02:41:26 2009 (r187260) +++ head/sys/conf/files.powerpc Thu Jan 15 02:46:43 2009 (r187261) @@ -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 Modified: head/sys/dev/iicbus/iicbus.c ============================================================================== --- head/sys/dev/iicbus/iicbus.c Thu Jan 15 02:41:26 2009 (r187260) +++ head/sys/dev/iicbus/iicbus.c Thu Jan 15 02:46:43 2009 (r187261) @@ -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); + Added: head/sys/dev/ofw/ofw_iicbus.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/ofw/ofw_iicbus.c Thu Jan 15 02:46:43 2009 (r187261) @@ -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); +} +
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