FreeBSD/Linux Kernel Cross Reference
sys/dev/auxio/auxio.c

     /*-
      * Copyright (c) 2004 Pyun YongHyeon
      * 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.
     *
     */
    
    /*      $NetBSD: auxio.c,v 1.11 2003/07/15 03:36:04 lukem Exp $ */
    
    /*-
     * Copyright (c) 2000, 2001 Matthew R. Green
     * 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.
     * 3. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * 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.
     */
    
    /*
     * AUXIO registers support on the sbus & ebus2, used for the floppy driver
     * and to control the system LED, for the BLINK option.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/6.4/sys/dev/auxio/auxio.c 155068 2006-01-30 21:47:48Z marius $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/lock.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/resource.h>
    #include <sys/rman.h>
    
    #include <dev/led/led.h>
    #include <dev/ofw/ofw_bus.h>
    #include <dev/ofw/openfirm.h>
    
    #include <machine/bus.h>
    #include <machine/ofw_machdep.h>
    #include <machine/resource.h>
    
    #include <sparc64/sbus/sbusvar.h>
    #include <dev/auxio/auxioreg.h>
    
    /*
     * on sun4u, auxio exists with one register (LED) on the sbus, and 5
     * registers on the ebus2 (pci) (LED, PCIMODE, FREQUENCY, SCSI
     * OSCILLATOR, and TEMP SENSE.
     */
    
    #define AUXIO_PCIO_LED  0
    #define AUXIO_PCIO_PCI  1
    #define AUXIO_PCIO_FREQ 2
    #define AUXIO_PCIO_OSC  3
    #define AUXIO_PCIO_TEMP 4
    #define AUXIO_PCIO_NREG 5
    
   struct auxio_softc {
           struct device           *sc_dev;
   
           int                     sc_nauxio;
           struct resource         *sc_res[AUXIO_PCIO_NREG];
           int                     sc_rid[AUXIO_PCIO_NREG];
           bus_space_tag_t         sc_regt[AUXIO_PCIO_NREG];
           bus_space_handle_t      sc_regh[AUXIO_PCIO_NREG];
           struct cdev             *sc_led_dev;
           u_int32_t               sc_led_stat;
   
           int                     sc_flags;
   #define AUXIO_LEDONLY           0x1
   #define AUXIO_EBUS              0x2
   #define AUXIO_SBUS              0x4
   
           struct mtx              sc_lock;
   };
   
   static void     auxio_led_func(void *arg, int onoff);
   static int      auxio_attach_common(struct auxio_softc *);
   static int      auxio_bus_probe(device_t);
   static int      auxio_sbus_attach(device_t);
   static int      auxio_ebus_attach(device_t);
   static int      auxio_bus_detach(device_t);
   static void     auxio_free_resource(struct auxio_softc *);
   static __inline u_int32_t auxio_led_read(struct auxio_softc *);
   static __inline void auxio_led_write(struct auxio_softc *, u_int32_t);
   
   /* SBus */
   static device_method_t auxio_sbus_methods[] = {
           DEVMETHOD(device_probe,         auxio_bus_probe),
           DEVMETHOD(device_attach,        auxio_sbus_attach),
           DEVMETHOD(device_detach,        auxio_bus_detach),
           {0, 0}
   };
   
   static driver_t auxio_sbus_driver = {
           "auxio",
           auxio_sbus_methods,
           sizeof(struct auxio_softc)
   };
   
   static devclass_t       auxio_devclass;
   DRIVER_MODULE(auxio, sbus, auxio_sbus_driver, auxio_devclass, 0, 0);
   
   /* EBus */
   static device_method_t auxio_ebus_methods[] = {
           DEVMETHOD(device_probe,         auxio_bus_probe),
           DEVMETHOD(device_attach,        auxio_ebus_attach),
           DEVMETHOD(device_detach,        auxio_bus_detach),
           {0, 0}
   };
   
   static driver_t auxio_ebus_driver = {
           "auxio",
           auxio_ebus_methods,
           sizeof(struct auxio_softc)
   };
   
   DRIVER_MODULE(auxio, ebus, auxio_ebus_driver, auxio_devclass, 0, 0);
   MODULE_VERSION(auxio, 1);
   
   #define AUXIO_LOCK_INIT(sc)     \
           mtx_init(&sc->sc_lock, "auxio mtx", NULL, MTX_DEF)
   #define AUXIO_LOCK(sc)          mtx_lock(&sc->sc_lock)
   #define AUXIO_UNLOCK(sc)        mtx_unlock(&sc->sc_lock)
   #define AUXIO_LOCK_DESTROY(sc)  mtx_destroy(&sc->sc_lock)
   
   static __inline void
   auxio_led_write(struct auxio_softc *sc, u_int32_t v)
   {
           if (sc->sc_flags & AUXIO_EBUS)
                   bus_space_write_4(sc->sc_regt[AUXIO_PCIO_LED],
                       sc->sc_regh[AUXIO_PCIO_LED], 0, v);
           else
                   bus_space_write_1(sc->sc_regt[AUXIO_PCIO_LED],
                       sc->sc_regh[AUXIO_PCIO_LED], 0, v);
   }
   
   static __inline u_int32_t
   auxio_led_read(struct auxio_softc *sc)
   {
           u_int32_t led;
   
           if (sc->sc_flags & AUXIO_EBUS)
                   led = bus_space_read_4(sc->sc_regt[AUXIO_PCIO_LED],
                       sc->sc_regh[AUXIO_PCIO_LED], 0);
           else
                   led = bus_space_read_1(sc->sc_regt[AUXIO_PCIO_LED],
                       sc->sc_regh[AUXIO_PCIO_LED], 0);
   
           return (led);
   }
   
   static void
   auxio_led_func(void *arg, int onoff)
   {
           struct auxio_softc *sc;
           u_int32_t led;
   
           sc = (struct auxio_softc *)arg;
   
           AUXIO_LOCK(sc);
           /*
            * NB: We must not touch the other bits of the SBus AUXIO reg.
            */
           led = auxio_led_read(sc);
           if (onoff)
                   led |= AUXIO_LED_LED;
           else
                   led &= ~AUXIO_LED_LED;
           auxio_led_write(sc, led);
           AUXIO_UNLOCK(sc);
   }
   
   static int
   auxio_bus_probe(device_t dev)
   {
           const char *name;
   
           name = ofw_bus_get_name(dev);
           if (strcmp("auxio", name) == 0) {
                   device_set_desc(dev, "Sun Auxiliary I/O");
                   return (0);
           }
   
           return (ENXIO);
   }
   
   static int
   auxio_ebus_attach(device_t dev)
   {
           struct auxio_softc *sc;
   
           sc = device_get_softc(dev);
           sc->sc_dev = dev;
   
           AUXIO_LOCK_INIT(sc);
           sc->sc_nauxio = AUXIO_PCIO_NREG;
           sc->sc_flags = AUXIO_LEDONLY | AUXIO_EBUS;
   
           return(auxio_attach_common(sc));
   }
   
   static int
   auxio_attach_common(struct auxio_softc *sc)
   {
           struct resource *res;
           int i;
   
           for (i = 0; i < sc->sc_nauxio; i++) {
                   sc->sc_rid[i] = i;
                   res = bus_alloc_resource_any(sc->sc_dev, SYS_RES_MEMORY,
                       &sc->sc_rid[i], RF_ACTIVE);
                   if (res == NULL) {
                           device_printf(sc->sc_dev,
                               "could not allocate resources\n");
                           goto attach_fail;
                   }
                   sc->sc_res[i] = res;
                   sc->sc_regt[i] = rman_get_bustag(res);
                   sc->sc_regh[i] = rman_get_bushandle(res);
           }
   
           sc->sc_led_stat = auxio_led_read(sc) & AUXIO_LED_LED;
           sc->sc_led_dev = led_create(auxio_led_func, sc, "auxioled");
           /* turn on the LED */
           auxio_led_func(sc, 1);
   
           return (0);
   
   attach_fail:
           auxio_free_resource(sc);
   
           return (ENXIO);
   }
   
   static int
   auxio_bus_detach(device_t dev)
   {
           struct auxio_softc *sc;
   
           sc = device_get_softc(dev);
           led_destroy(sc->sc_led_dev);
           auxio_led_func(sc, sc->sc_led_stat);
           auxio_free_resource(sc);
   
           return (0);
   }
   
   static void
   auxio_free_resource(struct auxio_softc *sc)
   {
           int i;
   
           for (i = 0; i < sc->sc_nauxio; i++)
                   if (sc->sc_res[i])
                           bus_release_resource(sc->sc_dev, SYS_RES_MEMORY,
                               sc->sc_rid[i], sc->sc_res[i]);
           AUXIO_LOCK_DESTROY(sc);
   }
   
   static int
   auxio_sbus_attach(device_t dev)
   {
           struct auxio_softc *sc;
   
           sc = device_get_softc(dev);
           sc->sc_dev = dev;
   
           AUXIO_LOCK_INIT(sc);
           sc->sc_nauxio = 1;
           sc->sc_flags = AUXIO_LEDONLY | AUXIO_SBUS;
   
           return (auxio_attach_common(sc));
   }

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