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  * $FreeBSD$
   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 #define EXPOSE_IDT_ADDR 1
   66 
   67 #if (defined(__i386__) || defined(__amd64__)) && defined(EXPOSE_IDT_ADDR)
   68 #include <vm/vm.h>
   69 #include <vm/vm_param.h>
   70 #include <vm/pmap.h>
   71 #include <machine/segments.h> /* for idt */
   72 #endif
   73 static bus_addr_t dcons_paddr;
   74 
   75 #if __FreeBSD_version >= 500000
   76 static int force_console = 0;
   77 TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
   78 #endif
   79 
   80 #ifndef CSRVAL_VENDOR_PRIVATE
   81 #define NEED_NEW_DRIVER
   82 #endif
   83 
   84 #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
   85 #define ADDR_LO(x)      ((x) & 0xffffff)
   86 
   87 struct dcons_crom_softc {
   88         struct firewire_dev_comm fd;
   89         struct crom_chunk unit;
   90         struct crom_chunk spec;
   91         struct crom_chunk ver;
   92         bus_dma_tag_t dma_tag;
   93         bus_dmamap_t dma_map;
   94         bus_addr_t bus_addr;
   95         eventhandler_tag ehand;
   96 };
   97 
   98 static void
   99 dcons_crom_identify(driver_t *driver, device_t parent)
  100 {
  101         BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
  102 }
  103 
  104 static int
  105 dcons_crom_probe(device_t dev)
  106 {
  107         device_t pa;
  108 
  109         pa = device_get_parent(dev);
  110         if(device_get_unit(dev) != device_get_unit(pa)){
  111                 return(ENXIO);
  112         }
  113 
  114         device_set_desc(dev, "dcons configuration ROM");
  115         return (0);
  116 }
  117 
  118 #ifndef NEED_NEW_DRIVER
  119 #if (defined(__i386__) || defined(__amd64__)) && defined(EXPOSE_IDT_ADDR)
  120 static void
  121 dcons_crom_expose_idt(struct dcons_crom_softc *sc)
  122 {
  123         static off_t idt_paddr;
  124 
  125         /* XXX */
  126         idt_paddr = (char *)idt - (char *)KERNBASE;
  127 
  128         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_HI, ADDR_HI(idt_paddr));
  129         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_LO, ADDR_LO(idt_paddr));
  130 }
  131 #endif
  132 static void
  133 dcons_crom_post_busreset(void *arg)
  134 {
  135         struct dcons_crom_softc *sc;
  136         struct crom_src *src;
  137         struct crom_chunk *root;
  138 
  139         sc = (struct dcons_crom_softc *) arg;
  140         src = sc->fd.fc->crom_src;
  141         root = sc->fd.fc->crom_root;
  142 
  143         bzero(&sc->unit, sizeof(struct crom_chunk));
  144 
  145         crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
  146         crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
  147         crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
  148         crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
  149         crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
  150         crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
  151         crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
  152 #if (defined(__i386__) || defined(__amd64__)) && defined(EXPOSE_IDT_ADDR)
  153         dcons_crom_expose_idt(sc);
  154 #endif
  155 }
  156 #endif
  157 
  158 static void
  159 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
  160 {
  161         struct dcons_crom_softc *sc;
  162 
  163         if (error)
  164                 printf("dcons_dmamap_cb: error=%d\n", error);
  165 
  166         sc = (struct dcons_crom_softc *)arg;
  167         sc->bus_addr = segments[0].ds_addr;
  168 
  169         bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
  170         device_printf(sc->fd.dev,
  171 #if __FreeBSD_version < 500000
  172             "bus_addr 0x%x\n", sc->bus_addr);
  173 #else
  174             "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
  175 #endif
  176         if (dcons_paddr != 0) {
  177                 /* XXX */
  178                 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
  179                 return;
  180         }
  181         dcons_conf->dma_tag = sc->dma_tag;
  182         dcons_conf->dma_map = sc->dma_map;
  183         dcons_paddr = sc->bus_addr;
  184 
  185 #if __FreeBSD_version >= 500000
  186         /* Force to be the high-level console */
  187         if (force_console)
  188                 cnselect(dcons_conf->cdev);
  189 #endif
  190 }
  191 
  192 static void
  193 dcons_crom_poll(void *p, int arg)
  194 {
  195         struct dcons_crom_softc *sc = (struct dcons_crom_softc *) p;
  196 
  197         sc->fd.fc->poll(sc->fd.fc, -1, -1);
  198 }
  199 
  200 static int
  201 dcons_crom_attach(device_t dev)
  202 {
  203 #ifdef NEED_NEW_DRIVER
  204         printf("dcons_crom: you need newer firewire driver\n");
  205         return (-1);
  206 #else
  207         struct dcons_crom_softc *sc;
  208         int error;
  209 
  210         if (dcons_conf->buf == NULL)
  211                 return (ENXIO);
  212         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  213         sc->fd.fc = device_get_ivars(dev);
  214         sc->fd.dev = dev;
  215         sc->fd.post_explore = NULL;
  216         sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
  217 
  218         /* map dcons buffer */
  219         error = bus_dma_tag_create(
  220                 /*parent*/ sc->fd.fc->dmat,
  221                 /*alignment*/ sizeof(u_int32_t),
  222                 /*boundary*/ 0,
  223                 /*lowaddr*/ BUS_SPACE_MAXADDR,
  224                 /*highaddr*/ BUS_SPACE_MAXADDR,
  225                 /*filter*/NULL, /*filterarg*/NULL,
  226                 /*maxsize*/ dcons_conf->size,
  227                 /*nsegments*/ 1,
  228                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
  229                 /*flags*/ BUS_DMA_ALLOCNOW,
  230 #if __FreeBSD_version >= 501102
  231                 /*lockfunc*/busdma_lock_mutex,
  232                 /*lockarg*/&Giant,
  233 #endif
  234                 &sc->dma_tag);
  235         if (error != 0)
  236                 return (error);
  237         error = bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map);
  238         if (error != 0)
  239                 return (error);
  240         error = bus_dmamap_load(sc->dma_tag, sc->dma_map,
  241             (void *)dcons_conf->buf, dcons_conf->size,
  242             dmamap_cb, sc, 0);
  243         if (error != 0)
  244                 return (error);
  245         sc->ehand = EVENTHANDLER_REGISTER(dcons_poll, dcons_crom_poll,
  246                          (void *)sc, 0);
  247         return (0);
  248 #endif
  249 }
  250 
  251 static int
  252 dcons_crom_detach(device_t dev)
  253 {
  254         struct dcons_crom_softc *sc;
  255 
  256         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  257         sc->fd.post_busreset = NULL;
  258 
  259         if (sc->ehand)
  260                 EVENTHANDLER_DEREGISTER(dcons_poll, sc->ehand);
  261 
  262         /* XXX */
  263         if (dcons_conf->dma_tag == sc->dma_tag)
  264                 dcons_conf->dma_tag = NULL;
  265 
  266         bus_dmamap_unload(sc->dma_tag, sc->dma_map);
  267         bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
  268         bus_dma_tag_destroy(sc->dma_tag);
  269 
  270         return 0;
  271 }
  272 
  273 static devclass_t dcons_crom_devclass;
  274 
  275 static device_method_t dcons_crom_methods[] = {
  276         /* device interface */
  277         DEVMETHOD(device_identify,      dcons_crom_identify),
  278         DEVMETHOD(device_probe,         dcons_crom_probe),
  279         DEVMETHOD(device_attach,        dcons_crom_attach),
  280         DEVMETHOD(device_detach,        dcons_crom_detach),
  281         { 0, 0 }
  282 };
  283 
  284 static driver_t dcons_crom_driver = {
  285         "dcons_crom",
  286         dcons_crom_methods,
  287         sizeof(struct dcons_crom_softc),
  288 };
  289 
  290 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver,
  291                                         dcons_crom_devclass, 0, 0);
  292 MODULE_VERSION(dcons_crom, 1);
  293 MODULE_DEPEND(dcons_crom, dcons,
  294         DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
  295 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);

Cache object: 3f279fe2cc1e7935e35982cf6156e5f3


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