/*- * 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 __FBSDID("$FreeBSD$"); /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #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_MEMORY, &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(dev, sc->res_irq, INTR_TYPE_NET /* | INTR_ENTROPY */, NULL, 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_MEMORY, sc->rid_ioport, sc->res_ioport); bus_release_resource(dev, SYS_RES_MEMORY, 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(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_MEMORY, sc->rid_ioport, sc->res_ioport); bus_release_resource(dev, SYS_RES_MEMORY, 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);