FreeBSD/Linux Kernel Cross Reference
sys/dev/dcons/dcons_crom.c

     /*-
      * Copyright (C) 2003
      *      Hidetoshi Shimokawa. 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *
     *      This product includes software developed by Hidetoshi Shimokawa.
     *
     * 4. Neither the name of the author nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     * 
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
     * 
     * $Id: dcons_crom.c,v 1.8 2003/10/23 15:47:21 simokawa Exp $
     * $FreeBSD: releng/11.0/sys/dev/dcons/dcons_crom.c 277505 2015-01-21 19:53:52Z will $
     */
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/systm.h>
    #include <sys/types.h>
    #include <sys/conf.h>
    #include <sys/malloc.h>
    
    #include <sys/bus.h>
    #include <machine/bus.h>
    
    #include <dev/firewire/firewire.h>
    #include <dev/firewire/firewirereg.h>
    #include <dev/firewire/iec13213.h>
    #include <dev/dcons/dcons.h>
    #include <dev/dcons/dcons_os.h>
    
    #include <sys/cons.h>
    
    #if (defined(__i386__) || defined(__amd64__))
    #include <vm/vm.h>
    #include <vm/vm_param.h>
    #include <vm/pmap.h>
    #include <machine/segments.h> /* for idt */
    #endif
    
    static bus_addr_t dcons_paddr;
    
    static int force_console = 0;
    TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
    
    #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
    #define ADDR_LO(x)      ((x) & 0xffffff)
    
    struct dcons_crom_softc {
            struct firewire_dev_comm fd;
            struct crom_chunk unit;
            struct crom_chunk spec;
            struct crom_chunk ver;
            bus_dma_tag_t dma_tag;
            bus_dmamap_t dma_map;
            bus_addr_t bus_addr;
            eventhandler_tag ehand;
    };
    
    static void
    dcons_crom_identify(driver_t *driver, device_t parent)
    {
            BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
    }
    
    static int
    dcons_crom_probe(device_t dev)
    {
            device_t pa;
    
            pa = device_get_parent(dev);
            if(device_get_unit(dev) != device_get_unit(pa)){
                    return(ENXIO);
            }
    
            device_set_desc(dev, "dcons configuration ROM");
           return (0);
   }
   
   #if (defined(__i386__) || defined(__amd64__))
   static void
   dcons_crom_expose_idt(struct dcons_crom_softc *sc)
   {
           static off_t idt_paddr;
   
           /* XXX */
           idt_paddr = (char *)idt - (char *)KERNBASE;
   
           crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_HI, ADDR_HI(idt_paddr));
           crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_LO, ADDR_LO(idt_paddr));
   }
   #endif
   
   static void
   dcons_crom_post_busreset(void *arg)
   {
           struct dcons_crom_softc *sc;
           struct crom_src *src;
           struct crom_chunk *root;
   
           sc = (struct dcons_crom_softc *) arg;
           src = sc->fd.fc->crom_src;
           root = sc->fd.fc->crom_root;
   
           bzero(&sc->unit, sizeof(struct crom_chunk));
   
           crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
           crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
           crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
           crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
           crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
           crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
           crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
   #if (defined(__i386__) || defined(__amd64__))
           dcons_crom_expose_idt(sc);
   #endif
   }
   
   static void
   dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
   {
           struct dcons_crom_softc *sc;
   
           if (error)
                   printf("dcons_dmamap_cb: error=%d\n", error);
   
           sc = (struct dcons_crom_softc *)arg;
           sc->bus_addr = segments[0].ds_addr;
   
           bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
           device_printf(sc->fd.dev,
               "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
           if (dcons_paddr != 0) {
                   /* XXX */
                   device_printf(sc->fd.dev, "dcons_paddr is already set\n");
                   return;
           }
           dcons_conf->dma_tag = sc->dma_tag;
           dcons_conf->dma_map = sc->dma_map;
           dcons_paddr = sc->bus_addr;
   
           /* Force to be the high-level console */
           if (force_console)
                   cnselect(dcons_conf->cdev);
   }
   
   static void
   dcons_crom_poll(void *p, int arg)
   {
           struct dcons_crom_softc *sc = (struct dcons_crom_softc *) p;
   
           sc->fd.fc->poll(sc->fd.fc, -1, -1);
   }
   
   static int
   dcons_crom_attach(device_t dev)
   {
           struct dcons_crom_softc *sc;
           int error;
   
           if (dcons_conf->buf == NULL)
                   return (ENXIO);
           sc = (struct dcons_crom_softc *) device_get_softc(dev);
           sc->fd.fc = device_get_ivars(dev);
           sc->fd.dev = dev;
           sc->fd.post_explore = NULL;
           sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
   
           /* map dcons buffer */
           error = bus_dma_tag_create(
                   /*parent*/ sc->fd.fc->dmat,
                   /*alignment*/ sizeof(u_int32_t),
                   /*boundary*/ 0,
                   /*lowaddr*/ BUS_SPACE_MAXADDR,
                   /*highaddr*/ BUS_SPACE_MAXADDR,
                   /*filter*/NULL, /*filterarg*/NULL,
                   /*maxsize*/ dcons_conf->size,
                   /*nsegments*/ 1,
                   /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
                   /*flags*/ BUS_DMA_ALLOCNOW,
                   /*lockfunc*/busdma_lock_mutex,
                   /*lockarg*/&Giant,
                   &sc->dma_tag);
           if (error != 0)
                   return (error);
           error = bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map);
           if (error != 0)
                   return (error);
           error = bus_dmamap_load(sc->dma_tag, sc->dma_map,
               (void *)dcons_conf->buf, dcons_conf->size,
               dmamap_cb, sc, 0);
           if (error != 0)
                   return (error);
           sc->ehand = EVENTHANDLER_REGISTER(dcons_poll, dcons_crom_poll,
                            (void *)sc, 0);
           return (0);
   }
   
   static int
   dcons_crom_detach(device_t dev)
   {
           struct dcons_crom_softc *sc;
   
           sc = (struct dcons_crom_softc *) device_get_softc(dev);
           sc->fd.post_busreset = NULL;
   
           if (sc->ehand)
                   EVENTHANDLER_DEREGISTER(dcons_poll, sc->ehand);
   
           /* XXX */
           if (dcons_conf->dma_tag == sc->dma_tag)
                   dcons_conf->dma_tag = NULL;
   
           bus_dmamap_unload(sc->dma_tag, sc->dma_map);
           bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
           bus_dma_tag_destroy(sc->dma_tag);
   
           return 0;
   }
   
   static devclass_t dcons_crom_devclass;
   
   static device_method_t dcons_crom_methods[] = {
           /* device interface */
           DEVMETHOD(device_identify,      dcons_crom_identify),
           DEVMETHOD(device_probe,         dcons_crom_probe),
           DEVMETHOD(device_attach,        dcons_crom_attach),
           DEVMETHOD(device_detach,        dcons_crom_detach),
           { 0, 0 }
   };
   
   static driver_t dcons_crom_driver = {
           "dcons_crom",
           dcons_crom_methods,
           sizeof(struct dcons_crom_softc),
   };
   
   DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver,
                                           dcons_crom_devclass, 0, 0);
   MODULE_VERSION(dcons_crom, 1);
   MODULE_DEPEND(dcons_crom, dcons,
           DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
   MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);

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