The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*
    2  * Copyright (C) 2003
    3  *      Hidetoshi Shimokawa. All rights reserved.
    4  * 
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *
   16  *      This product includes software developed by Hidetoshi Shimokawa.
   17  *
   18  * 4. Neither the name of the author nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  * 
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  * 
   34  * $Id: dcons_crom.c,v 1.8 2003/10/23 15:47:21 simokawa Exp $
   35  * $FreeBSD: releng/5.2/sys/dev/dcons/dcons_crom.c 122310 2003-11-08 16:26:22Z simokawa $
   36  */
   37 
   38 #include <sys/param.h>
   39 #include <sys/kernel.h>
   40 #include <sys/systm.h>
   41 #include <sys/types.h>
   42 #include <sys/conf.h>
   43 #include <sys/malloc.h>
   44 
   45 #include <sys/bus.h>
   46 #include <machine/bus.h>
   47 
   48 #include <dev/firewire/firewire.h>
   49 #include <dev/firewire/firewirereg.h>
   50 #include <dev/firewire/iec13213.h>
   51 #include <dev/dcons/dcons.h>
   52 
   53 static bus_addr_t dcons_paddr;
   54 
   55 #ifndef CSRVAL_VENDOR_PRIVATE
   56 #define NEED_NEW_DRIVER
   57 #endif
   58 
   59 #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
   60 #define ADDR_LO(x)      ((x) & 0xffffff)
   61 
   62 struct dcons_crom_softc {
   63         struct firewire_dev_comm fd;
   64         struct crom_chunk unit;
   65         struct crom_chunk spec;
   66         struct crom_chunk ver;
   67         bus_dma_tag_t dma_tag;
   68         bus_dmamap_t dma_map;
   69         bus_addr_t bus_addr;
   70 };
   71 
   72 static void
   73 dcons_crom_identify(driver_t *driver, device_t parent)
   74 {
   75         BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
   76 }
   77 
   78 static int
   79 dcons_crom_probe(device_t dev)
   80 {
   81         device_t pa;
   82 
   83         pa = device_get_parent(dev);
   84         if(device_get_unit(dev) != device_get_unit(pa)){
   85                 return(ENXIO);
   86         }
   87 
   88         device_set_desc(dev, "dcons configuration ROM");
   89         return (0);
   90 }
   91 
   92 #ifndef NEED_NEW_DRIVER
   93 static void
   94 dcons_crom_post_busreset(void *arg)
   95 {
   96         struct dcons_crom_softc *sc;
   97         struct crom_src *src;
   98         struct crom_chunk *root;
   99 
  100         sc = (struct dcons_crom_softc *) arg;
  101         src = sc->fd.fc->crom_src;
  102         root = sc->fd.fc->crom_root;
  103 
  104         bzero(&sc->unit, sizeof(struct crom_chunk));
  105 
  106         crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
  107         crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
  108         crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
  109         crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
  110         crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
  111         crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
  112         crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
  113 }
  114 #endif
  115 
  116 static void
  117 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
  118 {
  119         struct dcons_crom_softc *sc;
  120 
  121         if (error)
  122                 printf("dcons_dmamap_cb: error=%d\n", error);
  123 
  124         sc = (struct dcons_crom_softc *)arg;
  125         sc->bus_addr = segments[0].ds_addr;
  126 
  127         bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
  128         device_printf(sc->fd.dev,
  129 #if __FreeBSD_version < 500000
  130             "bus_addr 0x%x\n", sc->bus_addr);
  131 #else
  132             "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
  133 #endif
  134         if (dcons_paddr != 0) {
  135                 /* XXX */
  136                 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
  137                 return;
  138         }
  139         dcons_dma_tag = sc->dma_tag;
  140         dcons_dma_map = sc->dma_map;
  141         dcons_paddr = sc->bus_addr;
  142 }
  143 
  144 static int
  145 dcons_crom_attach(device_t dev)
  146 {
  147 #ifdef NEED_NEW_DRIVER
  148         printf("dcons_crom: you need newer firewire driver\n");
  149         return (-1);
  150 #else
  151         struct dcons_crom_softc *sc;
  152 
  153         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  154         sc->fd.fc = device_get_ivars(dev);
  155         sc->fd.dev = dev;
  156         sc->fd.post_explore = NULL;
  157         sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
  158 
  159         /* map dcons buffer */
  160         bus_dma_tag_create(
  161                 /*parent*/ sc->fd.fc->dmat,
  162                 /*alignment*/ sizeof(u_int32_t),
  163                 /*boundary*/ 0,
  164                 /*lowaddr*/ BUS_SPACE_MAXADDR,
  165                 /*highaddr*/ BUS_SPACE_MAXADDR,
  166                 /*filter*/NULL, /*filterarg*/NULL,
  167                 /*maxsize*/ dcons_bufsize,
  168                 /*nsegments*/ 1,
  169                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
  170                 /*flags*/ BUS_DMA_ALLOCNOW,
  171 #if __FreeBSD_version >= 501102
  172                 /*lockfunc*/busdma_lock_mutex,
  173                 /*lockarg*/&Giant,
  174 #endif
  175                 &sc->dma_tag);
  176         bus_dmamap_create(sc->dma_tag, 0, &sc->dma_map);
  177         bus_dmamap_load(sc->dma_tag, sc->dma_map,
  178             (void *)dcons_buf, dcons_bufsize,
  179             dmamap_cb, sc, 0);
  180         return (0);
  181 #endif
  182 }
  183 
  184 static int
  185 dcons_crom_detach(device_t dev)
  186 {
  187         struct dcons_crom_softc *sc;
  188 
  189         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  190         sc->fd.post_busreset = NULL;
  191 
  192         /* XXX */
  193         if (dcons_dma_tag == sc->dma_tag)
  194                 dcons_dma_tag = NULL;
  195 
  196         bus_dmamap_unload(sc->dma_tag, sc->dma_map);
  197         bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
  198         bus_dma_tag_destroy(sc->dma_tag);
  199 
  200         return 0;
  201 }
  202 
  203 static devclass_t dcons_crom_devclass;
  204 
  205 static device_method_t dcons_crom_methods[] = {
  206         /* device interface */
  207         DEVMETHOD(device_identify,      dcons_crom_identify),
  208         DEVMETHOD(device_probe,         dcons_crom_probe),
  209         DEVMETHOD(device_attach,        dcons_crom_attach),
  210         DEVMETHOD(device_detach,        dcons_crom_detach),
  211         { 0, 0 }
  212 };
  213 
  214 static driver_t dcons_crom_driver = {
  215         "dcons_crom",
  216         dcons_crom_methods,
  217         sizeof(struct dcons_crom_softc),
  218 };
  219 
  220 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver,
  221                                         dcons_crom_devclass, 0, 0);
  222 MODULE_VERSION(dcons_crom, 1);
  223 MODULE_DEPEND(dcons_crom, dcons,
  224         DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
  225 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);

Cache object: dfd93111fef49e1ab1479d90bf6a5b7e


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