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: releng/12.0/sys/dev/dcons/dcons_crom.c 332489 2018-04-13 20:30:49Z kib $
   38  */
   39 
   40 #include <sys/param.h>
   41 #include <sys/kernel.h>
   42 #include <sys/module.h>
   43 #include <sys/systm.h>
   44 #include <sys/types.h>
   45 #include <sys/conf.h>
   46 #include <sys/malloc.h>
   47 
   48 #include <sys/bus.h>
   49 #include <machine/bus.h>
   50 
   51 #include <dev/firewire/firewire.h>
   52 #include <dev/firewire/firewirereg.h>
   53 #include <dev/firewire/iec13213.h>
   54 #include <dev/dcons/dcons.h>
   55 #include <dev/dcons/dcons_os.h>
   56 
   57 #include <sys/cons.h>
   58 
   59 #if (defined(__i386__) || defined(__amd64__))
   60 #include <vm/vm.h>
   61 #include <vm/vm_param.h>
   62 #include <vm/pmap.h>
   63 #include <machine/segments.h> /* for idt */
   64 #endif
   65 
   66 static bus_addr_t dcons_paddr;
   67 
   68 static int force_console = 0;
   69 TUNABLE_INT("hw.firewire.dcons_crom.force_console", &force_console);
   70 
   71 #define ADDR_HI(x)      (((x) >> 24) & 0xffffff)
   72 #define ADDR_LO(x)      ((x) & 0xffffff)
   73 
   74 struct dcons_crom_softc {
   75         struct firewire_dev_comm fd;
   76         struct crom_chunk unit;
   77         struct crom_chunk spec;
   78         struct crom_chunk ver;
   79         bus_dma_tag_t dma_tag;
   80         bus_dmamap_t dma_map;
   81         bus_addr_t bus_addr;
   82         eventhandler_tag ehand;
   83 };
   84 
   85 static void
   86 dcons_crom_identify(driver_t *driver, device_t parent)
   87 {
   88         BUS_ADD_CHILD(parent, 0, "dcons_crom", device_get_unit(parent));
   89 }
   90 
   91 static int
   92 dcons_crom_probe(device_t dev)
   93 {
   94         device_t pa;
   95 
   96         pa = device_get_parent(dev);
   97         if(device_get_unit(dev) != device_get_unit(pa)){
   98                 return(ENXIO);
   99         }
  100 
  101         device_set_desc(dev, "dcons configuration ROM");
  102         return (0);
  103 }
  104 
  105 #if (defined(__i386__) || defined(__amd64__))
  106 static void
  107 dcons_crom_expose_idt(struct dcons_crom_softc *sc)
  108 {
  109         static off_t idt_paddr;
  110 
  111         /* XXX */
  112 #ifdef __amd64__
  113         idt_paddr = (char *)idt - (char *)KERNBASE;
  114 #else /* __i386__ */
  115         idt_paddr = (off_t)pmap_kextract((vm_offset_t)idt);
  116 #endif
  117 
  118         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_HI, ADDR_HI(idt_paddr));
  119         crom_add_entry(&sc->unit, DCONS_CSR_KEY_RESET_LO, ADDR_LO(idt_paddr));
  120 }
  121 #endif
  122 
  123 static void
  124 dcons_crom_post_busreset(void *arg)
  125 {
  126         struct dcons_crom_softc *sc;
  127         struct crom_src *src;
  128         struct crom_chunk *root;
  129 
  130         sc = (struct dcons_crom_softc *) arg;
  131         src = sc->fd.fc->crom_src;
  132         root = sc->fd.fc->crom_root;
  133 
  134         bzero(&sc->unit, sizeof(struct crom_chunk));
  135 
  136         crom_add_chunk(src, root, &sc->unit, CROM_UDIR);
  137         crom_add_entry(&sc->unit, CSRKEY_SPEC, CSRVAL_VENDOR_PRIVATE);
  138         crom_add_simple_text(src, &sc->unit, &sc->spec, "FreeBSD");
  139         crom_add_entry(&sc->unit, CSRKEY_VER, DCONS_CSR_VAL_VER);
  140         crom_add_simple_text(src, &sc->unit, &sc->ver, "dcons");
  141         crom_add_entry(&sc->unit, DCONS_CSR_KEY_HI, ADDR_HI(dcons_paddr));
  142         crom_add_entry(&sc->unit, DCONS_CSR_KEY_LO, ADDR_LO(dcons_paddr));
  143 #if (defined(__i386__) || defined(__amd64__))
  144         dcons_crom_expose_idt(sc);
  145 #endif
  146 }
  147 
  148 static void
  149 dmamap_cb(void *arg, bus_dma_segment_t *segments, int seg, int error)
  150 {
  151         struct dcons_crom_softc *sc;
  152 
  153         if (error)
  154                 printf("dcons_dmamap_cb: error=%d\n", error);
  155 
  156         sc = (struct dcons_crom_softc *)arg;
  157         sc->bus_addr = segments[0].ds_addr;
  158 
  159         bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_PREWRITE);
  160         device_printf(sc->fd.dev,
  161             "bus_addr 0x%jx\n", (uintmax_t)sc->bus_addr);
  162         if (dcons_paddr != 0) {
  163                 /* XXX */
  164                 device_printf(sc->fd.dev, "dcons_paddr is already set\n");
  165                 return;
  166         }
  167         dcons_conf->dma_tag = sc->dma_tag;
  168         dcons_conf->dma_map = sc->dma_map;
  169         dcons_paddr = sc->bus_addr;
  170 
  171         /* Force to be the high-level console */
  172         if (force_console)
  173                 cnselect(dcons_conf->cdev);
  174 }
  175 
  176 static void
  177 dcons_crom_poll(void *p, int arg)
  178 {
  179         struct dcons_crom_softc *sc = (struct dcons_crom_softc *) p;
  180 
  181         sc->fd.fc->poll(sc->fd.fc, -1, -1);
  182 }
  183 
  184 static int
  185 dcons_crom_attach(device_t dev)
  186 {
  187         struct dcons_crom_softc *sc;
  188         int error;
  189 
  190         if (dcons_conf->buf == NULL)
  191                 return (ENXIO);
  192         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  193         sc->fd.fc = device_get_ivars(dev);
  194         sc->fd.dev = dev;
  195         sc->fd.post_explore = NULL;
  196         sc->fd.post_busreset = (void *) dcons_crom_post_busreset;
  197 
  198         /* map dcons buffer */
  199         error = bus_dma_tag_create(
  200                 /*parent*/ sc->fd.fc->dmat,
  201                 /*alignment*/ sizeof(u_int32_t),
  202                 /*boundary*/ 0,
  203                 /*lowaddr*/ BUS_SPACE_MAXADDR,
  204                 /*highaddr*/ BUS_SPACE_MAXADDR,
  205                 /*filter*/NULL, /*filterarg*/NULL,
  206                 /*maxsize*/ dcons_conf->size,
  207                 /*nsegments*/ 1,
  208                 /*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
  209                 /*flags*/ BUS_DMA_ALLOCNOW,
  210                 /*lockfunc*/busdma_lock_mutex,
  211                 /*lockarg*/&Giant,
  212                 &sc->dma_tag);
  213         if (error != 0)
  214                 return (error);
  215         error = bus_dmamap_create(sc->dma_tag, BUS_DMA_COHERENT, &sc->dma_map);
  216         if (error != 0)
  217                 return (error);
  218         error = bus_dmamap_load(sc->dma_tag, sc->dma_map,
  219             (void *)dcons_conf->buf, dcons_conf->size,
  220             dmamap_cb, sc, 0);
  221         if (error != 0)
  222                 return (error);
  223         sc->ehand = EVENTHANDLER_REGISTER(dcons_poll, dcons_crom_poll,
  224                          (void *)sc, 0);
  225         return (0);
  226 }
  227 
  228 static int
  229 dcons_crom_detach(device_t dev)
  230 {
  231         struct dcons_crom_softc *sc;
  232 
  233         sc = (struct dcons_crom_softc *) device_get_softc(dev);
  234         sc->fd.post_busreset = NULL;
  235 
  236         if (sc->ehand)
  237                 EVENTHANDLER_DEREGISTER(dcons_poll, sc->ehand);
  238 
  239         /* XXX */
  240         if (dcons_conf->dma_tag == sc->dma_tag)
  241                 dcons_conf->dma_tag = NULL;
  242 
  243         bus_dmamap_unload(sc->dma_tag, sc->dma_map);
  244         bus_dmamap_destroy(sc->dma_tag, sc->dma_map);
  245         bus_dma_tag_destroy(sc->dma_tag);
  246 
  247         return 0;
  248 }
  249 
  250 static devclass_t dcons_crom_devclass;
  251 
  252 static device_method_t dcons_crom_methods[] = {
  253         /* device interface */
  254         DEVMETHOD(device_identify,      dcons_crom_identify),
  255         DEVMETHOD(device_probe,         dcons_crom_probe),
  256         DEVMETHOD(device_attach,        dcons_crom_attach),
  257         DEVMETHOD(device_detach,        dcons_crom_detach),
  258         { 0, 0 }
  259 };
  260 
  261 static driver_t dcons_crom_driver = {
  262         "dcons_crom",
  263         dcons_crom_methods,
  264         sizeof(struct dcons_crom_softc),
  265 };
  266 
  267 DRIVER_MODULE(dcons_crom, firewire, dcons_crom_driver,
  268                                         dcons_crom_devclass, 0, 0);
  269 MODULE_VERSION(dcons_crom, 1);
  270 MODULE_DEPEND(dcons_crom, dcons,
  271         DCONS_VERSION, DCONS_VERSION, DCONS_VERSION);
  272 MODULE_DEPEND(dcons_crom, firewire, 1, 1, 1);

Cache object: 268ab22a1eeb64d69551ca8bb7a271bd


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