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/5.4/sys/dev/dcons/dcons_crom.c 143014 2005-03-02 10:45:30Z obrien $
   36  */
   37 
   38 #include <sys/param.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 #include <sys/systm.h>
   42 #include <sys/types.h>
   43 #include <sys/conf.h>
   44 #include <sys/malloc.h>
   45 
   46 #include <sys/bus.h>
   47 #include <machine/bus.h>
   48 
   49 #ifdef __DragonFly__
   50 #include <bus/firewire/firewire.h>
   51 #include <bus/firewire/firewirereg.h>
   52 #include <bus/firewire/iec13213.h>
   53 #include "dcons.h"
   54 #include "dcons_os.h"
   55 #else
   56 #include <dev/firewire/firewire.h>
   57 #include <dev/firewire/firewirereg.h>
   58 #include <dev/firewire/iec13213.h>
   59 #include <dev/dcons/dcons.h>
   60 #include <dev/dcons/dcons_os.h>
   61 #endif
   62 
   63 #include <sys/cons.h>
   64 
   65 static bus_addr_t dcons_paddr;
   66 
   67 #if __FreeBSD_version >= 500000
   68 static int force_console = 1;
   69 TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
   70 #endif
   71 
   72 #ifndef CSRVAL_VENDOR_PRIVATE
   73 #define NEED_NEW_DRIVER
   74 #endif
   75 
   76 #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
   77 #define ADDR_LO(x)      ((x) & 0xffffff)
   78 
   79 struct dcons_crom_softc {
   80         struct firewire_dev_comm fd;
   81         struct crom_chunk unit;
   82         struct crom_chunk spec;
   83         struct crom_chunk ver;
   84         bus_dma_tag_t dma_tag;
   85         bus_dmamap_t dma_map;
   86         bus_addr_t bus_addr;
   87 };
   88 
   89 static void
   90 dcons_crom_identify(driver_t *driver, device_t parent)
   91 {
   92         BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
   93 }
   94 
   95 static int
   96 dcons_crom_probe(device_t dev)
   97 {
   98         device_t pa;
   99 
  100         pa = device_get_parent(dev);
  101         if(device_get_unit(dev) != device_get_unit(pa)){
  102                 return(ENXIO);
  103         }
  104 
  105         device_set_desc(dev, "dcons configuration ROM");
  106         return (0);
  107 }
  108 
  109 #ifndef NEED_NEW_DRIVER
  110 static void
  111 dcons_crom_post_busreset(void *arg)
  112 {
  113         struct dcons_crom_softc *sc;
  114         struct crom_src *src;
  115         struct crom_chunk *root;
  116 
  117         sc = (struct dcons_crom_softc *) arg;
  118         src = sc->fd.fc->crom_src;
  119         root = sc->fd.fc->crom_root;
  120 
  121         bzero(&sc->unit, sizeof(struct crom_chunk));
  122 
  123         crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
  124         crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
  125         crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
  126         crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
  127         crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
  128         crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
  129         crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
  130 }
  131 #endif
  132 
  133 static void
  134 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
  135 {
  136         struct dcons_crom_softc *sc;
  137 
  138         if (error)
  139                 printf("dcons_dmamap_cb: error=%d\n", error);
  140 
  141         sc = (struct dcons_crom_softc *)arg;
  142         sc->bus_addr = segments[0].ds_addr;
  143 
  144         bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
  145         device_printf(sc->fd.dev,
  146 #if __FreeBSD_version < 500000
  147             "bus_addr 0x%x\n", sc->bus_addr);
  148 #else
  149             "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
  150 #endif
  151         if (dcons_paddr != 0) {
  152                 /* XXX */
  153                 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
  154                 return;
  155         }
  156         dcons_conf->dma_tag = sc->dma_tag;
  157         dcons_conf->dma_map = sc->dma_map;
  158         dcons_paddr = sc->bus_addr;
  159 
  160 #if __FreeBSD_version >= 500000
  161         /* Force to be the high-level console */
  162         if (force_console)
  163                 cnselect(dcons_conf->cdev);
  164 #endif
  165 }
  166 
  167 static int
  168 dcons_crom_attach(device_t dev)
  169 {
  170 #ifdef NEED_NEW_DRIVER
  171         printf("dcons_crom: you need newer firewire driver\n");
  172         return (-1);
  173 #else
  174         struct dcons_crom_softc *sc;
  175 
  176         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  177         sc->fd.fc = device_get_ivars(dev);
  178         sc->fd.dev = dev;
  179         sc->fd.post_explore = NULL;
  180         sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
  181 
  182         /* map dcons buffer */
  183         bus_dma_tag_create(
  184                 /*parent*/ sc->fd.fc->dmat,
  185                 /*alignment*/ sizeof(u_int32_t),
  186                 /*boundary*/ 0,
  187                 /*lowaddr*/ BUS_SPACE_MAXADDR,
  188                 /*highaddr*/ BUS_SPACE_MAXADDR,
  189                 /*filter*/NULL, /*filterarg*/NULL,
  190                 /*maxsize*/ dcons_conf->size,
  191                 /*nsegments*/ 1,
  192                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
  193                 /*flags*/ BUS_DMA_ALLOCNOW,
  194 #if __FreeBSD_version >= 501102
  195                 /*lockfunc*/busdma_lock_mutex,
  196                 /*lockarg*/&Giant,
  197 #endif
  198                 &sc->dma_tag);
  199         bus_dmamap_create(sc->dma_tag, 0, &sc->dma_map);
  200         bus_dmamap_load(sc->dma_tag, sc->dma_map,
  201             (void *)dcons_conf->buf, dcons_conf->size,
  202             dmamap_cb, sc, 0);
  203         return (0);
  204 #endif
  205 }
  206 
  207 static int
  208 dcons_crom_detach(device_t dev)
  209 {
  210         struct dcons_crom_softc *sc;
  211 
  212         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  213         sc->fd.post_busreset = NULL;
  214 
  215         /* XXX */
  216         if (dcons_conf->dma_tag == sc->dma_tag)
  217                 dcons_conf->dma_tag = NULL;
  218 
  219         bus_dmamap_unload(sc->dma_tag, sc->dma_map);
  220         bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
  221         bus_dma_tag_destroy(sc->dma_tag);
  222 
  223         return 0;
  224 }
  225 
  226 static devclass_t dcons_crom_devclass;
  227 
  228 static device_method_t dcons_crom_methods[] = {
  229         /* device interface */
  230         DEVMETHOD(device_identify,      dcons_crom_identify),
  231         DEVMETHOD(device_probe,         dcons_crom_probe),
  232         DEVMETHOD(device_attach,        dcons_crom_attach),
  233         DEVMETHOD(device_detach,        dcons_crom_detach),
  234         { 0, 0 }
  235 };
  236 
  237 static driver_t dcons_crom_driver = {
  238         "dcons_crom",
  239         dcons_crom_methods,
  240         sizeof(struct dcons_crom_softc),
  241 };
  242 
  243 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver,
  244                                         dcons_crom_devclass, 0, 0);
  245 MODULE_VERSION(dcons_crom, 1);
  246 MODULE_DEPEND(dcons_crom, dcons,
  247         DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
  248 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);

Cache object: 8617fa46d8ee2f26ebb59c44a14d6d47


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