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/11.2/sys/dev/dcons/dcons_crom.c 331722 2018-03-29 02:50:57Z eadler $
   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 #include <dev/firewire/firewire.h>
   50 #include <dev/firewire/firewirereg.h>
   51 #include <dev/firewire/iec13213.h>
   52 #include <dev/dcons/dcons.h>
   53 #include <dev/dcons/dcons_os.h>
   54 
   55 #include <sys/cons.h>
   56 
   57 #if (defined(__i386__) || defined(__amd64__))
   58 #include <vm/vm.h>
   59 #include <vm/vm_param.h>
   60 #include <vm/pmap.h>
   61 #include <machine/segments.h> /* for idt */
   62 #endif
   63 
   64 static bus_addr_t dcons_paddr;
   65 
   66 static int force_console = 0;
   67 TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
   68 
   69 #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
   70 #define ADDR_LO(x)      ((x) & 0xffffff)
   71 
   72 struct dcons_crom_softc {
   73         struct firewire_dev_comm fd;
   74         struct crom_chunk unit;
   75         struct crom_chunk spec;
   76         struct crom_chunk ver;
   77         bus_dma_tag_t dma_tag;
   78         bus_dmamap_t dma_map;
   79         bus_addr_t bus_addr;
   80         eventhandler_tag ehand;
   81 };
   82 
   83 static void
   84 dcons_crom_identify(driver_t *driver, device_t parent)
   85 {
   86         BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
   87 }
   88 
   89 static int
   90 dcons_crom_probe(device_t dev)
   91 {
   92         device_t pa;
   93 
   94         pa = device_get_parent(dev);
   95         if(device_get_unit(dev) != device_get_unit(pa)){
   96                 return(ENXIO);
   97         }
   98 
   99         device_set_desc(dev, "dcons configuration ROM");
  100         return (0);
  101 }
  102 
  103 #if (defined(__i386__) || defined(__amd64__))
  104 static void
  105 dcons_crom_expose_idt(struct dcons_crom_softc *sc)
  106 {
  107         static off_t idt_paddr;
  108 
  109         /* XXX */
  110         idt_paddr = (char *)idt - (char *)KERNBASE;
  111 
  112         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_HI, ADDR_HI(idt_paddr));
  113         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_LO, ADDR_LO(idt_paddr));
  114 }
  115 #endif
  116 
  117 static void
  118 dcons_crom_post_busreset(void *arg)
  119 {
  120         struct dcons_crom_softc *sc;
  121         struct crom_src *src;
  122         struct crom_chunk *root;
  123 
  124         sc = (struct dcons_crom_softc *) arg;
  125         src = sc->fd.fc->crom_src;
  126         root = sc->fd.fc->crom_root;
  127 
  128         bzero(&sc->unit, sizeof(struct crom_chunk));
  129 
  130         crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
  131         crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
  132         crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
  133         crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
  134         crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
  135         crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
  136         crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
  137 #if (defined(__i386__) || defined(__amd64__))
  138         dcons_crom_expose_idt(sc);
  139 #endif
  140 }
  141 
  142 static void
  143 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
  144 {
  145         struct dcons_crom_softc *sc;
  146 
  147         if (error)
  148                 printf("dcons_dmamap_cb: error=%d\n", error);
  149 
  150         sc = (struct dcons_crom_softc *)arg;
  151         sc->bus_addr = segments[0].ds_addr;
  152 
  153         bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
  154         device_printf(sc->fd.dev,
  155             "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
  156         if (dcons_paddr != 0) {
  157                 /* XXX */
  158                 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
  159                 return;
  160         }
  161         dcons_conf->dma_tag = sc->dma_tag;
  162         dcons_conf->dma_map = sc->dma_map;
  163         dcons_paddr = sc->bus_addr;
  164 
  165         /* Force to be the high-level console */
  166         if (force_console)
  167                 cnselect(dcons_conf->cdev);
  168 }
  169 
  170 static void
  171 dcons_crom_poll(void *p, int arg)
  172 {
  173         struct dcons_crom_softc *sc = (struct dcons_crom_softc *) p;
  174 
  175         sc->fd.fc->poll(sc->fd.fc, -1, -1);
  176 }
  177 
  178 static int
  179 dcons_crom_attach(device_t dev)
  180 {
  181         struct dcons_crom_softc *sc;
  182         int error;
  183 
  184         if (dcons_conf->buf == NULL)
  185                 return (ENXIO);
  186         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  187         sc->fd.fc = device_get_ivars(dev);
  188         sc->fd.dev = dev;
  189         sc->fd.post_explore = NULL;
  190         sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
  191 
  192         /* map dcons buffer */
  193         error = bus_dma_tag_create(
  194                 /*parent*/ sc->fd.fc->dmat,
  195                 /*alignment*/ sizeof(u_int32_t),
  196                 /*boundary*/ 0,
  197                 /*lowaddr*/ BUS_SPACE_MAXADDR,
  198                 /*highaddr*/ BUS_SPACE_MAXADDR,
  199                 /*filter*/NULL, /*filterarg*/NULL,
  200                 /*maxsize*/ dcons_conf->size,
  201                 /*nsegments*/ 1,
  202                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
  203                 /*flags*/ BUS_DMA_ALLOCNOW,
  204                 /*lockfunc*/busdma_lock_mutex,
  205                 /*lockarg*/&Giant,
  206                 &sc->dma_tag);
  207         if (error != 0)
  208                 return (error);
  209         error = bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map);
  210         if (error != 0)
  211                 return (error);
  212         error = bus_dmamap_load(sc->dma_tag, sc->dma_map,
  213             (void *)dcons_conf->buf, dcons_conf->size,
  214             dmamap_cb, sc, 0);
  215         if (error != 0)
  216                 return (error);
  217         sc->ehand = EVENTHANDLER_REGISTER(dcons_poll, dcons_crom_poll,
  218                          (void *)sc, 0);
  219         return (0);
  220 }
  221 
  222 static int
  223 dcons_crom_detach(device_t dev)
  224 {
  225         struct dcons_crom_softc *sc;
  226 
  227         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  228         sc->fd.post_busreset = NULL;
  229 
  230         if (sc->ehand)
  231                 EVENTHANDLER_DEREGISTER(dcons_poll, sc->ehand);
  232 
  233         /* XXX */
  234         if (dcons_conf->dma_tag == sc->dma_tag)
  235                 dcons_conf->dma_tag = NULL;
  236 
  237         bus_dmamap_unload(sc->dma_tag, sc->dma_map);
  238         bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
  239         bus_dma_tag_destroy(sc->dma_tag);
  240 
  241         return 0;
  242 }
  243 
  244 static devclass_t dcons_crom_devclass;
  245 
  246 static device_method_t dcons_crom_methods[] = {
  247         /* device interface */
  248         DEVMETHOD(device_identify,      dcons_crom_identify),
  249         DEVMETHOD(device_probe,         dcons_crom_probe),
  250         DEVMETHOD(device_attach,        dcons_crom_attach),
  251         DEVMETHOD(device_detach,        dcons_crom_detach),
  252         { 0, 0 }
  253 };
  254 
  255 static driver_t dcons_crom_driver = {
  256         "dcons_crom",
  257         dcons_crom_methods,
  258         sizeof(struct dcons_crom_softc),
  259 };
  260 
  261 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver,
  262                                         dcons_crom_devclass, 0, 0);
  263 MODULE_VERSION(dcons_crom, 1);
  264 MODULE_DEPEND(dcons_crom, dcons,
  265         DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
  266 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);

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