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/isa/vga_isa.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    3  * 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 as
   10  *    the first lines of this file unmodified.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: src/sys/isa/vga_isa.c,v 1.33 2005/02/28 21:06:14 iedowse Exp $");
   29 
   30 #include "opt_vga.h"
   31 #include "opt_fb.h"
   32 #include "opt_syscons.h"        /* should be removed in the future, XXX */
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/malloc.h>
   38 #include <sys/module.h>
   39 #include <sys/conf.h>
   40 #include <sys/bus.h>
   41 #include <sys/fbio.h>
   42 
   43 #include <machine/bus.h>
   44 #include <machine/resource.h>
   45 
   46 #include <sys/rman.h>
   47 
   48 #include <vm/vm.h>
   49 #include <vm/pmap.h>
   50 
   51 #include <machine/md_var.h>
   52 #ifdef __i386__
   53 #include <machine/pc/bios.h>
   54 #endif
   55 
   56 #include <dev/fb/fbreg.h>
   57 #include <dev/fb/vgareg.h>
   58 
   59 #include <isa/isareg.h>
   60 #include <isa/isavar.h>
   61 
   62 #define VGA_SOFTC(unit)         \
   63         ((vga_softc_t *)devclass_get_softc(isavga_devclass, unit))
   64 
   65 static devclass_t       isavga_devclass;
   66 
   67 #ifdef FB_INSTALL_CDEV
   68 
   69 static d_open_t         isavga_open;
   70 static d_close_t        isavga_close;
   71 static d_read_t         isavga_read;
   72 static d_write_t        isavga_write;
   73 static d_ioctl_t        isavga_ioctl;
   74 static d_mmap_t         isavga_mmap;
   75 
   76 static struct cdevsw isavga_cdevsw = {
   77         .d_version =    D_VERSION,
   78         .d_flags =      D_NEEDGIANT,
   79         .d_open =       isavga_open,
   80         .d_close =      isavga_close,
   81         .d_read =       isavga_read,
   82         .d_write =      isavga_write,
   83         .d_ioctl =      isavga_ioctl,
   84         .d_mmap =       isavga_mmap,
   85         .d_name =       VGA_DRIVER_NAME,
   86 };
   87 
   88 #endif /* FB_INSTALL_CDEV */
   89 
   90 static void
   91 isavga_identify(driver_t *driver, device_t parent)
   92 {
   93         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, VGA_DRIVER_NAME, 0);
   94 }
   95 
   96 static int
   97 isavga_probe(device_t dev)
   98 {
   99         video_adapter_t adp;
  100         int error;
  101 
  102         /* No pnp support */
  103         if (isa_get_vendorid(dev))
  104                 return (ENXIO);
  105 
  106         device_set_desc(dev, "Generic ISA VGA");
  107         error = vga_probe_unit(device_get_unit(dev), &adp, device_get_flags(dev));
  108         if (error == 0) {
  109                 bus_set_resource(dev, SYS_RES_IOPORT, 0,
  110                                  adp.va_io_base, adp.va_io_size);
  111                 bus_set_resource(dev, SYS_RES_MEMORY, 0,
  112                                  adp.va_mem_base, adp.va_mem_size);
  113 #if 0
  114                 isa_set_port(dev, adp.va_io_base);
  115                 isa_set_portsize(dev, adp.va_io_size);
  116                 isa_set_maddr(dev, adp.va_mem_base);
  117                 isa_set_msize(dev, adp.va_mem_size);
  118 #endif
  119         }
  120         return error;
  121 }
  122 
  123 static int
  124 isavga_attach(device_t dev)
  125 {
  126         vga_softc_t *sc;
  127         int unit;
  128         int rid;
  129         int error;
  130 
  131         unit = device_get_unit(dev);
  132         sc = device_get_softc(dev);
  133 
  134         rid = 0;
  135         bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
  136                                   0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
  137         rid = 0;
  138         bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
  139                                  0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
  140 
  141         error = vga_attach_unit(unit, sc, device_get_flags(dev));
  142         if (error)
  143                 return error;
  144 
  145 #ifdef FB_INSTALL_CDEV
  146         /* attach a virtual frame buffer device */
  147         error = fb_attach(VGA_MKMINOR(unit), sc->adp, &isavga_cdevsw);
  148         if (error)
  149                 return error;
  150 #endif /* FB_INSTALL_CDEV */
  151 
  152         if (0 && bootverbose)
  153                 (*vidsw[sc->adp->va_index]->diag)(sc->adp, bootverbose);
  154 
  155 #if experimental
  156         device_add_child(dev, "fb", -1);
  157         bus_generic_attach(dev);
  158 #endif
  159 
  160         return 0;
  161 }
  162 
  163 static int
  164 isavga_suspend(device_t dev)
  165 {
  166         vga_softc_t *sc;
  167         int err, nbytes;
  168 
  169         sc = device_get_softc(dev);
  170         err = bus_generic_suspend(dev);
  171         if (err)
  172                 return (err);
  173 
  174         /* Save the video state across the suspend. */
  175         if (sc->state_buf != NULL) {
  176                 free(sc->state_buf, M_TEMP);
  177                 sc->state_buf = NULL;
  178         }
  179         nbytes = (*vidsw[sc->adp->va_index]->save_state)(sc->adp, NULL, 0);
  180         if (nbytes <= 0)
  181                 return (0);
  182         sc->state_buf = malloc(nbytes, M_TEMP, M_NOWAIT | M_ZERO);
  183         if (sc->state_buf == NULL)
  184                 return (0);
  185         if (bootverbose)
  186                 device_printf(dev, "saving %d bytes of video state\n", nbytes);
  187         if ((*vidsw[sc->adp->va_index]->save_state)(sc->adp, sc->state_buf,
  188             nbytes) != 0) {
  189                 device_printf(dev, "failed to save state (nbytes=%d)\n",
  190                     nbytes);
  191                 free(sc->state_buf, M_TEMP);
  192                 sc->state_buf = NULL;
  193         }
  194         return (0);
  195 }
  196 
  197 static int
  198 isavga_resume(device_t dev)
  199 {
  200         vga_softc_t *sc;
  201 
  202         sc = device_get_softc(dev);
  203         if (sc->state_buf != NULL) {
  204                 if ((*vidsw[sc->adp->va_index]->load_state)(sc->adp,
  205                     sc->state_buf) != 0)
  206                         device_printf(dev, "failed to reload state\n");
  207                 free(sc->state_buf, M_TEMP);
  208                 sc->state_buf = NULL;
  209         }
  210 
  211         bus_generic_resume(dev);
  212         return 0;
  213 }
  214 
  215 #ifdef FB_INSTALL_CDEV
  216 
  217 static int
  218 isavga_open(struct cdev *dev, int flag, int mode, struct thread *td)
  219 {
  220         return vga_open(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
  221 }
  222 
  223 static int
  224 isavga_close(struct cdev *dev, int flag, int mode, struct thread *td)
  225 {
  226         return vga_close(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
  227 }
  228 
  229 static int
  230 isavga_read(struct cdev *dev, struct uio *uio, int flag)
  231 {
  232         return vga_read(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
  233 }
  234 
  235 static int
  236 isavga_write(struct cdev *dev, struct uio *uio, int flag)
  237 {
  238         return vga_write(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
  239 }
  240 
  241 static int
  242 isavga_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
  243 {
  244         return vga_ioctl(dev, VGA_SOFTC(VGA_UNIT(dev)), cmd, arg, flag, td);
  245 }
  246 
  247 static int
  248 isavga_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int prot)
  249 {
  250         return vga_mmap(dev, VGA_SOFTC(VGA_UNIT(dev)), offset, paddr, prot);
  251 }
  252 
  253 #endif /* FB_INSTALL_CDEV */
  254 
  255 static device_method_t isavga_methods[] = {
  256         DEVMETHOD(device_identify,      isavga_identify),
  257         DEVMETHOD(device_probe,         isavga_probe),
  258         DEVMETHOD(device_attach,        isavga_attach),
  259         DEVMETHOD(device_suspend,       isavga_suspend),
  260         DEVMETHOD(device_resume,        isavga_resume),
  261 
  262         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  263         { 0, 0 }
  264 };
  265 
  266 static driver_t isavga_driver = {
  267         VGA_DRIVER_NAME,
  268         isavga_methods,
  269         sizeof(vga_softc_t),
  270 };
  271 
  272 DRIVER_MODULE(vga, isa, isavga_driver, isavga_devclass, 0, 0);

Cache object: bfc82f8f06096a38aa736b77adac285e


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