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  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (C) 2003
    5  *      Hidetoshi Shimokawa. All rights reserved.
    6  * 
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *
   18  *      This product includes software developed by Hidetoshi Shimokawa.
   19  *
   20  * 4. Neither the name of the author nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  * 
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  * 
   36  * $Id: dcons_crom.c,v 1.8 2003/10/23 15:47:21 simokawa Exp $
   37  * $FreeBSD$
   38  */
   39 
   40 #include <sys/param.h>
   41 #include <sys/eventhandler.h>
   42 #include <sys/kernel.h>
   43 #include <sys/module.h>
   44 #include <sys/systm.h>
   45 #include <sys/types.h>
   46 #include <sys/conf.h>
   47 #include <sys/malloc.h>
   48 
   49 #include <sys/bus.h>
   50 #include <machine/bus.h>
   51 
   52 #include <dev/firewire/firewire.h>
   53 #include <dev/firewire/firewirereg.h>
   54 #include <dev/firewire/iec13213.h>
   55 #include <dev/dcons/dcons.h>
   56 #include <dev/dcons/dcons_os.h>
   57 
   58 #include <sys/cons.h>
   59 
   60 #if (defined(__i386__) || defined(__amd64__))
   61 #include <vm/vm.h>
   62 #include <vm/vm_param.h>
   63 #include <vm/pmap.h>
   64 #include <machine/segments.h> /* for idt */
   65 #endif
   66 
   67 static bus_addr_t dcons_paddr;
   68 
   69 static int force_console = 0;
   70 TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
   71 
   72 #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
   73 #define ADDR_LO(x)      ((x) & 0xffffff)
   74 
   75 struct dcons_crom_softc {
   76         struct firewire_dev_comm fd;
   77         struct crom_chunk unit;
   78         struct crom_chunk spec;
   79         struct crom_chunk ver;
   80         bus_dma_tag_t dma_tag;
   81         bus_dmamap_t dma_map;
   82         bus_addr_t bus_addr;
   83         eventhandler_tag ehand;
   84 };
   85 
   86 static void
   87 dcons_crom_identify(driver_t *driver, device_t parent)
   88 {
   89         BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
   90 }
   91 
   92 static int
   93 dcons_crom_probe(device_t dev)
   94 {
   95         device_t pa;
   96 
   97         pa = device_get_parent(dev);
   98         if(device_get_unit(dev) != device_get_unit(pa)){
   99                 return(ENXIO);
  100         }
  101 
  102         device_set_desc(dev, "dcons configuration ROM");
  103         return (0);
  104 }
  105 
  106 #if (defined(__i386__) || defined(__amd64__))
  107 static void
  108 dcons_crom_expose_idt(struct dcons_crom_softc *sc)
  109 {
  110         static off_t idt_paddr;
  111 
  112         /* XXX */
  113 #ifdef __amd64__
  114         idt_paddr = (char *)idt - (char *)KERNBASE;
  115 #else /* __i386__ */
  116         idt_paddr = (off_t)pmap_kextract((vm_offset_t)idt);
  117 #endif
  118 
  119         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_HI, ADDR_HI(idt_paddr));
  120         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_LO, ADDR_LO(idt_paddr));
  121 }
  122 #endif
  123 
  124 static void
  125 dcons_crom_post_busreset(void *arg)
  126 {
  127         struct dcons_crom_softc *sc;
  128         struct crom_src *src;
  129         struct crom_chunk *root;
  130 
  131         sc = (struct dcons_crom_softc *) arg;
  132         src = sc->fd.fc->crom_src;
  133         root = sc->fd.fc->crom_root;
  134 
  135         bzero(&sc->unit, sizeof(struct crom_chunk));
  136 
  137         crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
  138         crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
  139         crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
  140         crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
  141         crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
  142         crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
  143         crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
  144 #if (defined(__i386__) || defined(__amd64__))
  145         dcons_crom_expose_idt(sc);
  146 #endif
  147 }
  148 
  149 static void
  150 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
  151 {
  152         struct dcons_crom_softc *sc;
  153 
  154         if (error)
  155                 printf("dcons_dmamap_cb: error=%d\n", error);
  156 
  157         sc = (struct dcons_crom_softc *)arg;
  158         sc->bus_addr = segments[0].ds_addr;
  159 
  160         bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
  161         device_printf(sc->fd.dev,
  162             "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
  163         if (dcons_paddr != 0) {
  164                 /* XXX */
  165                 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
  166                 return;
  167         }
  168         dcons_conf->dma_tag = sc->dma_tag;
  169         dcons_conf->dma_map = sc->dma_map;
  170         dcons_paddr = sc->bus_addr;
  171 
  172         /* Force to be the high-level console */
  173         if (force_console)
  174                 cnselect(dcons_conf->cdev);
  175 }
  176 
  177 static void
  178 dcons_crom_poll(void *p, int arg)
  179 {
  180         struct dcons_crom_softc *sc = (struct dcons_crom_softc *) p;
  181 
  182         sc->fd.fc->poll(sc->fd.fc, -1, -1);
  183 }
  184 
  185 static int
  186 dcons_crom_attach(device_t dev)
  187 {
  188         struct dcons_crom_softc *sc;
  189         int error;
  190 
  191         if (dcons_conf->buf == NULL)
  192                 return (ENXIO);
  193         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  194         sc->fd.fc = device_get_ivars(dev);
  195         sc->fd.dev = dev;
  196         sc->fd.post_explore = NULL;
  197         sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
  198 
  199         /* map dcons buffer */
  200         error = bus_dma_tag_create(
  201                 /*parent*/ sc->fd.fc->dmat,
  202                 /*alignment*/ sizeof(u_int32_t),
  203                 /*boundary*/ 0,
  204                 /*lowaddr*/ BUS_SPACE_MAXADDR,
  205                 /*highaddr*/ BUS_SPACE_MAXADDR,
  206                 /*filter*/NULL, /*filterarg*/NULL,
  207                 /*maxsize*/ dcons_conf->size,
  208                 /*nsegments*/ 1,
  209                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
  210                 /*flags*/ BUS_DMA_ALLOCNOW,
  211                 /*lockfunc*/busdma_lock_mutex,
  212                 /*lockarg*/&Giant,
  213                 &sc->dma_tag);
  214         if (error != 0)
  215                 return (error);
  216         error = bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map);
  217         if (error != 0)
  218                 return (error);
  219         error = bus_dmamap_load(sc->dma_tag, sc->dma_map,
  220             (void *)dcons_conf->buf, dcons_conf->size,
  221             dmamap_cb, sc, 0);
  222         if (error != 0)
  223                 return (error);
  224         sc->ehand = EVENTHANDLER_REGISTER(dcons_poll, dcons_crom_poll,
  225                          (void *)sc, 0);
  226         return (0);
  227 }
  228 
  229 static int
  230 dcons_crom_detach(device_t dev)
  231 {
  232         struct dcons_crom_softc *sc;
  233 
  234         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  235         sc->fd.post_busreset = NULL;
  236 
  237         if (sc->ehand)
  238                 EVENTHANDLER_DEREGISTER(dcons_poll, sc->ehand);
  239 
  240         /* XXX */
  241         if (dcons_conf->dma_tag == sc->dma_tag)
  242                 dcons_conf->dma_tag = NULL;
  243 
  244         bus_dmamap_unload(sc->dma_tag, sc->dma_map);
  245         bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
  246         bus_dma_tag_destroy(sc->dma_tag);
  247 
  248         return 0;
  249 }
  250 
  251 static device_method_t dcons_crom_methods[] = {
  252         /* device interface */
  253         DEVMETHOD(device_identify,      dcons_crom_identify),
  254         DEVMETHOD(device_probe,         dcons_crom_probe),
  255         DEVMETHOD(device_attach,        dcons_crom_attach),
  256         DEVMETHOD(device_detach,        dcons_crom_detach),
  257         { 0, 0 }
  258 };
  259 
  260 static driver_t dcons_crom_driver = {
  261         "dcons_crom",
  262         dcons_crom_methods,
  263         sizeof(struct dcons_crom_softc),
  264 };
  265 
  266 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver, 0, 0);
  267 MODULE_VERSION(dcons_crom, 1);
  268 MODULE_DEPEND(dcons_crom, dcons,
  269         DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
  270 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);

Cache object: 1905bf7ef3924e77d5235e3ee6782399


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