FreeBSD/Linux Kernel Cross Reference
sys/isa/vga_isa.c

     /*-
      * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer as
     *    the first lines of this file unmodified.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/5.3/sys/isa/vga_isa.c 130585 2004-06-16 09:47:26Z phk $");
    
    #include "opt_vga.h"
    #include "opt_fb.h"
    #include "opt_syscons.h"        /* should be removed in the future, XXX */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/conf.h>
    #include <sys/bus.h>
    #include <sys/fbio.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    
    #include <sys/rman.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <machine/md_var.h>
    #ifdef __i386__
    #include <machine/pc/bios.h>
    #endif
    
    #include <dev/fb/fbreg.h>
    #include <dev/fb/vgareg.h>
    
    #include <isa/isareg.h>
    #include <isa/isavar.h>
    
    #define VGA_SOFTC(unit)         \
            ((vga_softc_t *)devclass_get_softc(isavga_devclass, unit))
    
    static devclass_t       isavga_devclass;
    
    #ifdef FB_INSTALL_CDEV
    
    static d_open_t         isavga_open;
    static d_close_t        isavga_close;
    static d_read_t         isavga_read;
    static d_write_t        isavga_write;
    static d_ioctl_t        isavga_ioctl;
    static d_mmap_t         isavga_mmap;
    
    static struct cdevsw isavga_cdevsw = {
            .d_version =    D_VERSION,
            .d_flags =      D_NEEDGIANT,
            .d_open =       isavga_open,
            .d_close =      isavga_close,
            .d_read =       isavga_read,
            .d_write =      isavga_write,
            .d_ioctl =      isavga_ioctl,
            .d_mmap =       isavga_mmap,
            .d_name =       VGA_DRIVER_NAME,
            .d_maj =        -1,
    };
    
    #endif /* FB_INSTALL_CDEV */
    
    static void
    isavga_identify(driver_t *driver, device_t parent)
    {
            BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, VGA_DRIVER_NAME, 0);
    }
    
    static int
    isavga_probe(device_t dev)
    {
            video_adapter_t adp;
           int error;
   
           /* No pnp support */
           if (isa_get_vendorid(dev))
                   return (ENXIO);
   
           device_set_desc(dev, "Generic ISA VGA");
           error = vga_probe_unit(device_get_unit(dev), &adp, device_get_flags(dev));
           if (error == 0) {
                   bus_set_resource(dev, SYS_RES_IOPORT, 0,
                                    adp.va_io_base, adp.va_io_size);
                   bus_set_resource(dev, SYS_RES_MEMORY, 0,
                                    adp.va_mem_base, adp.va_mem_size);
   #if 0
                   isa_set_port(dev, adp.va_io_base);
                   isa_set_portsize(dev, adp.va_io_size);
                   isa_set_maddr(dev, adp.va_mem_base);
                   isa_set_msize(dev, adp.va_mem_size);
   #endif
           }
           return error;
   }
   
   static int
   isavga_attach(device_t dev)
   {
           vga_softc_t *sc;
           int unit;
           int rid;
           int error;
   
           unit = device_get_unit(dev);
           sc = device_get_softc(dev);
   
           rid = 0;
           bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
                                     0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
           rid = 0;
           bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
                                    0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
   
           error = vga_attach_unit(unit, sc, device_get_flags(dev));
           if (error)
                   return error;
   
   #ifdef FB_INSTALL_CDEV
           /* attach a virtual frame buffer device */
           error = fb_attach(VGA_MKMINOR(unit), sc->adp, &isavga_cdevsw);
           if (error)
                   return error;
   #endif /* FB_INSTALL_CDEV */
   
           if (bootverbose)
                   (*vidsw[sc->adp->va_index]->diag)(sc->adp, bootverbose);
   
   #if experimental
           device_add_child(dev, "fb", -1);
           bus_generic_attach(dev);
   #endif
   
           return 0;
   }
   
   #ifdef FB_INSTALL_CDEV
   
   static int
   isavga_open(struct cdev *dev, int flag, int mode, struct thread *td)
   {
           return vga_open(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
   }
   
   static int
   isavga_close(struct cdev *dev, int flag, int mode, struct thread *td)
   {
           return vga_close(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
   }
   
   static int
   isavga_read(struct cdev *dev, struct uio *uio, int flag)
   {
           return vga_read(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
   }
   
   static int
   isavga_write(struct cdev *dev, struct uio *uio, int flag)
   {
           return vga_write(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
   }
   
   static int
   isavga_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
   {
           return vga_ioctl(dev, VGA_SOFTC(VGA_UNIT(dev)), cmd, arg, flag, td);
   }
   
   static int
   isavga_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int prot)
   {
           return vga_mmap(dev, VGA_SOFTC(VGA_UNIT(dev)), offset, paddr, prot);
   }
   
   #endif /* FB_INSTALL_CDEV */
   
   static device_method_t isavga_methods[] = {
           DEVMETHOD(device_identify,      isavga_identify),
           DEVMETHOD(device_probe,         isavga_probe),
           DEVMETHOD(device_attach,        isavga_attach),
   
           DEVMETHOD(bus_print_child,      bus_generic_print_child),
           { 0, 0 }
   };
   
   static driver_t isavga_driver = {
           VGA_DRIVER_NAME,
           isavga_methods,
           sizeof(vga_softc_t),
   };
   
   DRIVER_MODULE(vga, isa, isavga_driver, isavga_devclass, 0, 0);

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