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grf_cc.c revision 1.11 
      1 /*
      2  *	$Id: grf_cc.c,v 1.11 1994/04/10 00:43:32 chopps Exp $
      3  */
      4 
      5 #include "grf.h"
      6 #if NGRF > 0
      7 
      8 /* Graphics routines for the AMIGA native custom chip set. */
      9 
     10 /* NOTE: this is now only a more or less rough interface to Chris Hopps'
     11          view driver. Due to some design problems with RTG view can't
     12 	 currently replace grf, but that's an option for the future. */
     13 
     14 #include <sys/param.h>
     15 #include <vm/vm_param.h>
     16 #include <sys/errno.h>
     17 #include <sys/ioctl.h>
     18 #include <sys/queue.h>
     19 
     20 #include <machine/cpu.h>
     21 
     22 #include <amiga/amiga/custom.h>
     23 #include <amiga/amiga/cia.h>
     24 #include <amiga/dev/grfioctl.h>
     25 #include <amiga/dev/grfvar.h>
     26 #include <amiga/dev/grf_ccreg.h>
     27 #include <amiga/dev/grfabs_reg.h>
     28 #include <amiga/dev/viewioctl.h>
     29 
     30 /* Initialize hardware.
     31  * Must point g_display at a grfinfo structure describing the hardware.
     32  * Returns 0 if hardware not present, non-zero ow.
     33  */
     34 cc_init(gp, ad)
     35 	struct grf_softc *gp;
     36 	struct amiga_device *ad;
     37 {
     38   bmap_t bm;
     39   struct grfinfo *gi = &gp->g_display;
     40   int rc;
     41   long start, off;
     42   struct view_size vs;
     43 
     44   /* already initialized fail */
     45   if (gp->g_data == (caddr_t) 12345678)
     46     return 0;
     47 
     48   rc = grfcc_probe ();
     49   if (! rc)
     50     return 0;
     51 
     52   viewprobe ();
     53 
     54   /* now it gets REALLY nasty.. view[0] stays open for all time
     55      now.. */
     56   if (viewopen (0, 0))
     57     return 0;
     58 
     59   /* XXX 0 may need to change when virtual added */
     60   XXX_grf_cc_on (0);
     61 
     62   return(1);
     63 }
     64 
     65 cc_config(gp, di)
     66 	register struct grf_softc *gp;
     67 	struct grfdyninfo *di;
     68 {
     69   struct grfinfo *gi = &gp->g_display;
     70 
     71   /* bottom missing... */
     72 
     73 }
     74 
     75 extern struct grf_softc grf_softc[];
     76 #define GPUNIT(ip) (((u_long)ip-(u_long)grf_softc)/sizeof(struct grf_softc))
     77 
     78 /*
     79  * Change the mode of the display.
     80  * Right now all we can do is grfon/grfoff.
     81  * Return a UNIX error number or 0 for success.
     82  */
     83 cc_mode(gp, cmd, arg)
     84 	register struct grf_softc *gp;
     85 	int cmd;
     86 	void *arg;
     87 {
     88   switch (cmd)
     89     {
     90     case GM_GRFON:
     91       XXX_grf_cc_on (GPUNIT (gp));
     92       return 0;
     93 
     94     case GM_GRFOFF:
     95       XXX_grf_cc_off (GPUNIT (gp));
     96       return 0;
     97 
     98     case GM_GRFCONFIG:
     99       return cc_config (gp, (struct grfdyninfo *) arg);
    100 
    101     default:
    102       break;
    103     }
    104 
    105   return EINVAL;
    106 }
    107 
    108 
    109 /* nasty nasty hack. right now grf's unit == ite's unit == view's unit. */
    110 /* to make X work (I guess) we need to update the grf structure's HW */
    111 /* address to the current view (as this may change without grf knowing.) */
    112 /* Thanks to M Hitch. for finding this one. */
    113 XXX_grf_cc_on (unit)
    114     int unit;
    115 {
    116   struct grf_softc *gp = &grf_softc[unit];
    117   struct grfinfo *gi = &gp->g_display;
    118   bmap_t bm;
    119   struct view_size vs;
    120 
    121   viewioctl (unit, VIOCGBMAP, &bm, 0, -1);
    122 
    123   gp->g_data = (caddr_t) 12345678; /* not particularly clean.. */
    124 
    125   gi->gd_regaddr = (caddr_t) 0xdff000;		/* no need to look at regs */
    126   gi->gd_regsize = round_page(sizeof (custom));	/* I mean it X people, for CC */
    127 					/* use the view device. That way */
    128 					/* we can have both X and a console. */
    129 					/* and flip between them.  People */
    130 					/* will be unhappy if this feature */
    131 					/* is so easy and yet not availble. */
    132 					/* (if you wern't using them then */
    133 					/* thanks.) */
    134 					/**** I will remove these soon.****/
    135   gi->gd_fbaddr  = bm.hardware_address;
    136   gi->gd_fbsize  = bm.depth*bm.bytes_per_row*bm.rows;
    137 
    138   if (viewioctl (unit, VIOCGSIZE, &vs, 0, -1))
    139     {
    140       /* fill in some default values... XXX */
    141       vs.width = 640; vs.height = 400; vs.depth = 2;
    142     }
    143 
    144   gi->gd_colors = 1 << vs.depth;
    145   gi->gd_planes = vs.depth;
    146 
    147   gi->gd_fbwidth  = vs.width;
    148   gi->gd_fbheight = vs.height;
    149   gi->gd_fbx	  = 0;
    150   gi->gd_fby	  = 0;
    151   gi->gd_dwidth   = vs.width;
    152   gi->gd_dheight  = vs.height;
    153   gi->gd_dx	  = 0;
    154   gi->gd_dy	  = 0;
    155 
    156   gp->g_regkva = 0;	/* builtin */
    157   gp->g_fbkva  = 0;	/* not needed, view internal */
    158 
    159   viewioctl (unit, VIOCDISPLAY, NULL, 0, -1);
    160 
    161 }
    162 
    163 XXX_grf_cc_off (unit)
    164     int unit;
    165 {
    166     viewioctl (unit, VIOCREMOVE, NULL, 0, -1);
    167 }
    168 
    169 
    170 #endif
    171 
    172