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255 lines
6.8 KiB
C
255 lines
6.8 KiB
C
/*-
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* Copyright (c) 2004 Marius Strobl, Joerg Wunsch
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*
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* derived from sys/i386/isa/pcf.c which is:
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*
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* Copyright (c) 1998 Nicolas Souchu, Marc Bouget
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Device specific driver for the EBus i2c devices found on some sun4u
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* systems. On systems not having a boot-bus controller the i2c devices
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* are PCF8584.
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*
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* Known onboard slave devices on the primary bus are:
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*
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* AXe:
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* 0x40 PCF8574 I/O fan status (CPU fans 1+2)
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* 0x9e PCF8591 A/D temperature (CPU + hotspot)
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*
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* AXmp:
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* 0x70 PCF8574 I/O fan status (fans 1-4)
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* 0x78 PCF8574 I/O fan fail interrupt
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* 0x9a PCF8591 A/D voltage (CPU core)
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* 0x9c PCF8591 A/D temperature (hotspots 1+2, aux. analog 1+2)
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* 0x9e PCF8591 A/D temperature (CPUs 1-4)
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*
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* CP1400:
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* 0x70 PCF8574 I/O reserved for factory use
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* 0x9e PCF8591 A/D temperature (CPU)
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*
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* CP1500:
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* 0x70 PCF8574 I/O reserved for factory use
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* 0x72 PCF8574 I/O geographic address + power supply status lines
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* 0x9e PCF8591 A/D temperature (CPU)
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* 0xa0 AT24C01A hostid
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*
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* For AXmp, CP1400 and CP1500 these are described in more detail in:
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* http://www.sun.com/oem/products/manuals/805-7581-04.pdf
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/resource.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/pcf/pcfvar.h>
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#include "iicbus_if.h"
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#define PCF_NAME "pcf"
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static int pcf_ebus_probe(device_t);
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static int pcf_ebus_attach(device_t);
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static int pcf_ebus_detach(device_t);
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static device_method_t pcf_ebus_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, pcf_ebus_probe),
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DEVMETHOD(device_attach, pcf_ebus_attach),
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DEVMETHOD(device_detach, pcf_ebus_detach),
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/* iicbus interface */
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DEVMETHOD(iicbus_callback, iicbus_null_callback),
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DEVMETHOD(iicbus_repeated_start, pcf_repeated_start),
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DEVMETHOD(iicbus_start, pcf_start),
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DEVMETHOD(iicbus_stop, pcf_stop),
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DEVMETHOD(iicbus_write, pcf_write),
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DEVMETHOD(iicbus_read, pcf_read),
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DEVMETHOD(iicbus_reset, pcf_rst_card),
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{ 0, 0 }
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};
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static devclass_t pcf_ebus_devclass;
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static driver_t pcf_ebus_driver = {
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PCF_NAME,
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pcf_ebus_methods,
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sizeof(struct pcf_softc),
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};
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static int
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pcf_ebus_probe(device_t dev)
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{
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const char *compat;
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/*
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* We must not attach to this i2c device if this is a system with
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* a boot-bus controller. Additionally testing the compatibility
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* property will hopefully take care of this.
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*/
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if (strcmp("i2c", ofw_bus_get_name(dev)) == 0) {
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compat = ofw_bus_get_compat(dev);
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if (compat != NULL && strcmp("i2cpcf,8584", compat) == 0) {
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device_set_desc(dev, "PCF8584 I2C bus controller");
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return (0);
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}
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}
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return (ENXIO);
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}
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static int
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pcf_ebus_attach(device_t dev)
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{
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struct pcf_softc *sc;
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int rv = ENXIO;
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phandle_t node;
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uint64_t own_addr;
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sc = DEVTOSOFTC(dev);
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bzero(sc, sizeof(struct pcf_softc));
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/* get OFW node of the pcf */
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if ((node = ofw_bus_get_node(dev)) <= 0) {
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device_printf(dev, "cannot get OFW node\n");
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goto error;
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}
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/* IO port is mandatory */
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sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->rid_ioport, RF_ACTIVE);
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if (sc->res_ioport == 0) {
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device_printf(dev, "cannot reserve I/O port range\n");
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goto error;
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}
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sc->bt_ioport = rman_get_bustag(sc->res_ioport);
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sc->bh_ioport = rman_get_bushandle(sc->res_ioport);
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sc->pcf_flags = device_get_flags(dev);
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/*
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* XXX use poll-mode property?
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*/
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if (!(sc->pcf_flags & IIC_POLLED)) {
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sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
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&sc->rid_irq, RF_ACTIVE);
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if (sc->res_irq == 0) {
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device_printf(dev, "can't reserve irq, polled mode.\n");
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sc->pcf_flags |= IIC_POLLED;
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}
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}
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/*
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* XXX on AXmp there's probably a second IRQ which is the fan fail
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* interrupt genererated by the PCF8574 at 0x78.
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*/
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/* get address of the pcf */
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if (OF_getprop(node, "own-address", &own_addr, sizeof(own_addr)) ==
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-1) {
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device_printf(dev, "cannot get own address\n");
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goto error;
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}
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if (bootverbose)
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device_printf(dev, "PCF8584 address: 0x%08llx\n", (unsigned
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long long)own_addr);
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/* reset the chip */
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pcf_rst_card(dev, IIC_FASTEST, own_addr, NULL);
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if (sc->res_irq) {
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rv = bus_setup_intr(dev, sc->res_irq,
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INTR_TYPE_NET /* | INTR_ENTROPY */, NULL, pcf_intr, sc,
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&sc->intr_cookie);
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if (rv) {
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device_printf(dev, "could not setup IRQ\n");
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goto error;
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}
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}
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if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
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device_printf(dev, "could not allocate iicbus instance\n");
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/* probe and attach the iicbus */
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bus_generic_attach(dev);
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return (0);
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error:
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if (sc->res_irq != 0) {
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bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
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sc->res_irq);
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}
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if (sc->res_ioport != 0) {
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport,
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sc->res_ioport);
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}
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return (rv);
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}
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static int
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pcf_ebus_detach(device_t dev)
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{
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struct pcf_softc *sc;
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int rv;
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sc = DEVTOSOFTC(dev);
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if ((rv = bus_generic_detach(dev)) != 0)
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return (rv);
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if ((rv = device_delete_child(dev, sc->iicbus)) != 0)
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return (rv);
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if (sc->res_irq != 0) {
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bus_teardown_intr(dev, sc->res_irq,
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sc->intr_cookie);
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bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
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sc->res_irq);
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}
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport,
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sc->res_ioport);
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return (0);
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}
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DRIVER_MODULE(pcf_ebus, ebus, pcf_ebus_driver, pcf_ebus_devclass, 0, 0);
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MODULE_DEPEND(pcf_ebus, iicbus, PCF_MINVER, PCF_PREFVER, PCF_MAXVER);
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MODULE_VERSION(pcf_ebus, PCF_MODVER);
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