1 files changed, 261 insertions, 0 deletions

diff --git a/sys/dev/pcf/pcf_ebus.c b/sys/dev/pcf/pcf_ebus.c
new file mode 100644
index 0000000000000..e88519af81b06
--- /dev/null
+++ b/sys/dev/pcf/pcf_ebus.c
@@ -0,0 +1,261 @@
+/*-
+ * 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("$FreeBSD$");
+
+/*
+ * 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 <machine/bus.h>
+#include <machine/resource.h>
+
+#include <sys/rman.h>
+
+#include <dev/ofw/openfirm.h>
+
+#include <sparc64/ebus/ebusvar.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)
+{
+	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", ebus_get_name(dev)) == 0) {
+		compat = ebus_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 = ebus_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->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);