FreeBSD/Linux Kernel Cross Reference
sys/chips/cfb_hdw.c

     /* 
      * Mach Operating System
      * Copyright (c) 1991,1990,1989 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * HISTORY
     * $Log:        cfb_hdw.c,v $
     * Revision 2.14  93/05/15  19:35:54  mrt
     *      machparam.h -> machspl.h
     * 
     * Revision 2.13  93/05/10  20:07:25  rvb
     *      Fixed types.
     *      [93/05/06  10:00:37  af]
     * 
     * Revision 2.12  93/02/05  08:04:55  danner
     *      Changes for Flamingo.
     *      [93/02/04  01:28:05  af]
     * 
     *      Interrupt routine takes an spllevel on mips only.
     *      [92/11/30            af]
     * 
     * Revision 2.11  92/05/22  15:46:47  jfriedl
     *      Now all screens clearup at boot.
     *      [92/05/21            af]
     * 
     * Revision 2.10  92/02/19  16:45:39  elf
     *      Reflected changes in tc_enable_interrupt().
     *      [92/02/10  17:13:38  af]
     * 
     * Revision 2.9  91/08/24  11:51:31  af
     *      Works on 3mins too.  New calling seq, declare screen sizes.
     *      [91/08/02  01:59:46  af]
     * 
     * Revision 2.8  91/06/25  20:53:24  rpd
     *      Tweaks to make gcc happy.
     * 
     * Revision 2.7  91/06/19  16:57:45  rvb
     *              File moved here from mips/PMAX since it tries to be generic.
     *      [91/06/04            rvb]
     * 
     * Revision 2.6  91/05/14  17:20:02  mrt
     *      Correcting copyright
     * 
     * Revision 2.5  91/02/14  14:33:38  mrt
     *      In interrupt routine, drop priority as now required.
     *      [91/02/12  12:44:36  af]
     * 
     * Revision 2.4  91/02/05  17:40:04  mrt
     *      Added author notices
     *      [91/02/04  11:12:22  mrt]
     * 
     *      Changed to use new Mach copyright
     *      [91/02/02  12:10:07  mrt]
     * 
     * Revision 2.3  90/12/05  23:30:35  af
     *      Cleaned up.
     *      [90/12/03  23:11:53  af]
     * 
     * Revision 2.1.1.1  90/11/01  03:42:09  af
     *      Created, from the DEC specs:
     *      "PMAG-BA TURBOchannel Color Frame Buffer Functional Specification"
     *      Workstation Systems Engineering, Palo Alto, CA. Aug 27, 1990
     *      [90/09/03            af]
     */
    /*
     *      File: cfb_hdw.c
     *      Author: Alessandro Forin, Carnegie Mellon University
     *      Date:   9/90
     *
     *      Driver for the 3max Color Frame Buffer Display,
     *      hardware-level operations.
     */
    
    #include <cfb.h>
    #if     (NCFB > 0)
    
    #include <platforms.h>
    
   #include <machine/machspl.h>
   #include <mach/std_types.h>
   #include <chips/busses.h>
   #include <chips/screen_defs.h>
   #include <chips/pm_defs.h>
   
   typedef pm_softc_t      cfb_softc_t;
   
   #ifdef  DECSTATION
   #include <mips/PMAX/pmag_ba.h>
   #include <mips/PMAX/tc.h>
   #endif
   
   #ifdef  FLAMINGO
   #include <mips/PMAX/pmag_ba.h>          /* XXX fixme */
   #include <alpha/DEC/tc.h>
   #endif
   
   /*
    * Definition of the driver for the auto-configuration program.
    */
   
   int     cfb_probe(), cfb_intr();
   static void     cfb_attach();
   
   vm_offset_t     cfb_std[NCFB] = { 0 };
   struct  bus_device *cfb_info[NCFB];
   struct  bus_driver cfb_driver = 
           { cfb_probe, 0, cfb_attach, 0, cfb_std, "cfb", cfb_info,
             0, 0, BUS_INTR_DISABLED};
   
   /*
    * Probe/Attach functions
    */
   
   cfb_probe( /* reg, ui */)
   {
           static probed_once = 0;
   
           /*
            * Probing was really done sweeping the TC long ago
            */
           if (tc_probe("cfb") == 0)
                   return 0;
           if (probed_once++ > 1)
                   printf("[mappable] ");
           return 1;
   }
   
   static void
   cfb_attach(ui)
           struct bus_device *ui;
   {
           /* ... */
           printf(": color display");
   }
   
   
   /*
    * Interrupt routine
    */
   
   cfb_intr(unit,spllevel)
           spl_t   spllevel;
   {
           register volatile char *ack;
   
           /* acknowledge interrupt */
           ack = (volatile char *) cfb_info[unit]->address + CFB_OFFSET_IREQ;
           *ack = 0;
   
   #ifdef  mips
           splx(spllevel);
   #endif
           lk201_led(unit);
   }
   
   cfb_vretrace(cfb, on)
           cfb_softc_t     *cfb;
   {
           int i;
   
           for (i = 0; i < NCFB; i++)
                   if (cfb_info[i]->address == (vm_offset_t)cfb->framebuffer)
                           break;
           if (i == NCFB) return;
   
           (*tc_enable_interrupt)(cfb_info[i]->adaptor, on, 0);
   }
   
   /*
    * Boot time initialization: must make device
    * usable as console asap.
    */
   extern int
           cfb_soft_reset(), cfb_set_status(),
           bt459_pos_cursor(), bt459_video_on(),
           bt459_video_off(), cfb_vretrace(),
           pm_get_status(), pm_char_paint(),
           pm_insert_line(), pm_remove_line(),
           pm_clear_bitmap(), pm_map_page();
   
   static struct screen_switch cfb_sw = {
           screen_noop,            /* graphic_open */
           cfb_soft_reset,         /* graphic_close */
           cfb_set_status,         /* set_status */
           pm_get_status,          /* get_status */
           pm_char_paint,          /* char_paint */
           bt459_pos_cursor,       /* pos_cursor */
           pm_insert_line,         /* insert_line */
           pm_remove_line,         /* remove_line */
           pm_clear_bitmap,        /* clear_bitmap */
           bt459_video_on,         /* video_on */
           bt459_video_off,        /* video_off */
           cfb_vretrace,           /* intr_enable */
           pm_map_page             /* map_page */
   };
   
   cfb_cold_init(unit, up)
           user_info_t     *up;
   {
           cfb_softc_t     *cfb;
           screen_softc_t  sc = screen(unit);
           int             base = tc_probe("cfb");
   
           bcopy(&cfb_sw, &sc->sw, sizeof(sc->sw));
           sc->flags |= COLOR_SCREEN;
           sc->frame_scanline_width = 1024;
           sc->frame_height = 1024;
           sc->frame_visible_width = 1024;
           sc->frame_visible_height = 864;
   
           pm_init_screen_params(sc,up);
           (void) screen_up(unit, up);
   
           cfb = pm_alloc(unit, base + CFB_OFFSET_BT459, base + CFB_OFFSET_VRAM, -1);
   
           screen_default_colors(up);
   
           cfb_soft_reset(sc);
   
           /*
            * Clearing the screen at boot saves from scrolling
            * much, and speeds up booting quite a bit.
            */
           screen_blitc( unit, 'C'-'@');/* clear screen */
   }
   
   #endif  (NCFB > 0)

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