FreeBSD-5.3/sys/dev/pcf/pcf_ebus.c
/*-
* Copyright (c) 2004 Marius Strobl, Joerg Wunsch
*
* derived from sys/i386/isa/pcf.c which is:
*
* Copyright (c) 1998 Nicolas Souchu, Marc Bouget
* 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 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: src/sys/dev/pcf/pcf_ebus.c,v 1.3 2004/08/12 17:41:30 marius Exp $");
/*
* Device specific driver for the EBus i2c devices found on some sun4u
* systems. On systems not having a boot-bus controller the i2c devices
* are PCF8584.
*
* Known onboard slave devices on the primary bus are:
*
* AXe:
* 0x40 PCF8574 I/O fan status (CPU fans 1+2)
* 0x9e PCF8591 A/D temperature (CPU + hotspot)
*
* AXmp:
* 0x70 PCF8574 I/O fan status (fans 1-4)
* 0x78 PCF8574 I/O fan fail interrupt
* 0x9a PCF8591 A/D voltage (CPU core)
* 0x9c PCF8591 A/D temperature (hotspots 1+2, aux. analog 1+2)
* 0x9e PCF8591 A/D temperature (CPUs 1-4)
*
* CP1400:
* 0x70 PCF8574 I/O reserved for factory use
* 0x9e PCF8591 A/D temperature (CPU)
*
* CP1500:
* 0x70 PCF8574 I/O reserved for factory use
* 0x72 PCF8574 I/O geographic address + power supply status lines
* 0x9e PCF8591 A/D temperature (CPU)
* 0xa0 AT24C01A hostid
*
* For AXmp, CP1400 and CP1500 these are described in more detail in:
* http://www.sun.com/oem/products/manuals/805-7581-04.pdf
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/iicbus/iiconf.h>
#include <dev/pcf/pcfvar.h>
#include "iicbus_if.h"
#define PCF_NAME "pcf"
static int pcf_ebus_probe(device_t);
static int pcf_ebus_attach(device_t);
static int pcf_ebus_detach(device_t);
static device_method_t pcf_ebus_methods[] = {
/* device interface */
DEVMETHOD(device_probe, pcf_ebus_probe),
DEVMETHOD(device_attach, pcf_ebus_attach),
DEVMETHOD(device_detach, pcf_ebus_detach),
/* iicbus interface */
DEVMETHOD(iicbus_callback, iicbus_null_callback),
DEVMETHOD(iicbus_repeated_start, pcf_repeated_start),
DEVMETHOD(iicbus_start, pcf_start),
DEVMETHOD(iicbus_stop, pcf_stop),
DEVMETHOD(iicbus_write, pcf_write),
DEVMETHOD(iicbus_read, pcf_read),
DEVMETHOD(iicbus_reset, pcf_rst_card),
{ 0, 0 }
};
static devclass_t pcf_ebus_devclass;
static driver_t pcf_ebus_driver = {
PCF_NAME,
pcf_ebus_methods,
sizeof(struct pcf_softc),
};
static int
pcf_ebus_probe(device_t dev)
{
const char *compat;
/*
* We must not attach to this i2c device if this is a system with
* a boot-bus controller. Additionally testing the compatibility
* property will hopefully take care of this.
*/
if (strcmp("i2c", ofw_bus_get_name(dev)) == 0) {
compat = ofw_bus_get_compat(dev);
if (compat != NULL && strcmp("i2cpcf,8584", compat) == 0) {
device_set_desc(dev, "PCF8584 I2C bus controller");
return (0);
}
}
return (ENXIO);
}
static int
pcf_ebus_attach(device_t dev)
{
struct pcf_softc *sc;
int rv = ENXIO;
phandle_t node;
uint64_t own_addr;
sc = DEVTOSOFTC(dev);
bzero(sc, sizeof(struct pcf_softc));
/* get OFW node of the pcf */
if ((node = ofw_bus_get_node(dev)) <= 0) {
device_printf(dev, "cannot get OFW node\n");
goto error;
}
/* IO port is mandatory */
sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
&sc->rid_ioport, RF_ACTIVE);
if (sc->res_ioport == 0) {
device_printf(dev, "cannot reserve I/O port range\n");
goto error;
}
sc->bt_ioport = rman_get_bustag(sc->res_ioport);
sc->bh_ioport = rman_get_bushandle(sc->res_ioport);
sc->pcf_flags = device_get_flags(dev);
/*
* XXX use poll-mode property?
*/
if (!(sc->pcf_flags & IIC_POLLED)) {
sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&sc->rid_irq, RF_ACTIVE);
if (sc->res_irq == 0) {
device_printf(dev, "can't reserve irq, polled mode.\n");
sc->pcf_flags |= IIC_POLLED;
}
}
/*
* XXX on AXmp there's probably a second IRQ which is the fan fail
* interrupt genererated by the PCF8574 at 0x78.
*/
/* get address of the pcf */
if (OF_getprop(node, "own-address", &own_addr, sizeof(own_addr)) ==
-1) {
device_printf(dev, "cannot get own address\n");
goto error;
}
if (bootverbose)
device_printf(dev, "PCF8584 address: 0x%08llx\n", (unsigned
long long)own_addr);
/* reset the chip */
pcf_rst_card(dev, IIC_FASTEST, own_addr, NULL);
if (sc->res_irq) {
rv = BUS_SETUP_INTR(device_get_parent(dev), dev, sc->res_irq,
INTR_TYPE_NET /* | INTR_ENTROPY */, pcf_intr, sc,
&sc->intr_cookie);
if (rv) {
device_printf(dev, "could not setup IRQ\n");
goto error;
}
}
if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
device_printf(dev, "could not allocate iicbus instance\n");
/* probe and attach the iicbus */
bus_generic_attach(dev);
return (0);
error:
if (sc->res_irq != 0) {
bus_deactivate_resource(dev, SYS_RES_IRQ, sc->rid_irq,
sc->res_irq);
bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
sc->res_irq);
}
if (sc->res_ioport != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, sc->rid_ioport,
sc->res_ioport);
bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport,
sc->res_ioport);
}
return (rv);
}
static int
pcf_ebus_detach(device_t dev)
{
struct pcf_softc *sc;
int rv;
sc = DEVTOSOFTC(dev);
if ((rv = bus_generic_detach(dev)) != 0)
return (rv);
if ((rv = device_delete_child(dev, sc->iicbus)) != 0)
return (rv);
if (sc->res_irq != 0) {
BUS_TEARDOWN_INTR(device_get_parent(dev), dev, sc->res_irq,
sc->intr_cookie);
bus_deactivate_resource(dev, SYS_RES_IRQ, sc->rid_irq,
sc->res_irq);
bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
sc->res_irq);
}
bus_deactivate_resource(dev, SYS_RES_IOPORT, sc->rid_ioport,
sc->res_ioport);
bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport,
sc->res_ioport);
return (0);
}
DRIVER_MODULE(pcf_ebus, ebus, pcf_ebus_driver, pcf_ebus_devclass, 0, 0);
MODULE_DEPEND(pcf_ebus, iicbus, PCF_MINVER, PCF_PREFVER, PCF_MAXVER);
MODULE_VERSION(pcf_ebus, PCF_MODVER);