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Annotation of 43BSDReno/sys/hpdev/grf_rb.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 University of Utah.
                      3:  * Copyright (c) 1990 The Regents of the University of California.
                      4:  * All rights reserved.
                      5:  *
                      6:  * This code is derived from software contributed to Berkeley by
                      7:  * the Systems Programming Group of the University of Utah Computer
                      8:  * Science Department.
                      9:  *
                     10:  * Redistribution is only permitted until one year after the first shipment
                     11:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
                     12:  * binary forms are permitted provided that: (1) source distributions retain
                     13:  * this entire copyright notice and comment, and (2) distributions including
                     14:  * binaries display the following acknowledgement:  This product includes
                     15:  * software developed by the University of California, Berkeley and its
                     16:  * contributors'' in the documentation or other materials provided with the
                     17:  * distribution and in all advertising materials mentioning features or use
                     18:  * of this software.  Neither the name of the University nor the names of
                     19:  * its contributors may be used to endorse or promote products derived from
                     20:  * this software without specific prior written permission.
                     21:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     22:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     23:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     24:  *
                     25:  * from: Utah $Hdr: grf_rb.c 1.10 89/04/11$
                     26:  *
                     27:  *     @(#)grf_rb.c    7.2 (Berkeley) 5/25/90
                     28:  */
                     29: 
                     30: #include "grf.h"
                     31: #if NGRF > 0
                     32: 
                     33: /*
                     34:  * Graphics routines for the Renaissance, HP98720 Graphics system.
                     35:  */
                     36: #include "param.h"
                     37: #include "errno.h"
                     38: 
                     39: #include "grfioctl.h"
                     40: #include "grfvar.h"
                     41: #include "grf_rbreg.h"
                     42: 
                     43: #include "machine/cpu.h"
                     44: 
                     45: /*
                     46:  * Initialize hardware.
                     47:  * Must point g_display at a grfinfo structure describing the hardware.
                     48:  * Returns 0 if hardware not present, non-zero ow.
                     49:  */
                     50: rb_init(gp, addr)
                     51:        struct grf_softc *gp;
                     52:        u_char *addr;
                     53: {
                     54:        register struct rboxfb *rbp;
                     55:        struct grfinfo *gi = &gp->g_display;
                     56:        int fboff;
                     57: 
                     58:        rbp = (struct rboxfb *) addr;
                     59:        gi->gd_regaddr = (caddr_t) UNIOV(addr);
                     60:        gi->gd_regsize = 0x20000;
                     61:        gi->gd_fbwidth = (rbp->fbwmsb << 8) | rbp->fbwlsb;
                     62:        gi->gd_fbheight = (rbp->fbhmsb << 8) | rbp->fbhlsb;
                     63:        fboff = (rbp->fbomsb << 8) | rbp->fbolsb;
                     64:        gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16);
                     65:        gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
                     66:        gi->gd_dwidth = (rbp->dwmsb << 8) | rbp->dwlsb;
                     67:        gi->gd_dheight = (rbp->dwmsb << 8) | rbp->dwlsb;
                     68:        gi->gd_planes = 0;      /* ?? */
                     69:        gi->gd_colors = 256;
                     70:        return(1);
                     71: }
                     72: 
                     73: /*
                     74:  * Change the mode of the display.
                     75:  * Right now all we can do is grfon/grfoff.
                     76:  * Return a UNIX error number or 0 for success.
                     77:  */
                     78: rb_mode(gp, cmd)
                     79:        register struct grf_softc *gp;
                     80: {
                     81:        register struct rboxfb *rbp;
                     82:        int error = 0;
                     83: 
                     84:        rbp = (struct rboxfb *) IOV(gp->g_display.gd_regaddr);
                     85:        switch (cmd) {
                     86:        /*
                     87:         * The minimal register info here is from the Renaissance X driver.
                     88:         */
                     89:        case GM_GRFON:
                     90:        case GM_GRFOFF:
                     91:                break;
                     92:        case GM_GRFOVON:
                     93:                rbp->write_enable = 0;
                     94:                rbp->opwen = 0xF;
                     95:                rbp->drive = 0x10;
                     96:                break;
                     97:        case GM_GRFOVOFF:
                     98:                rbp->opwen = 0;
                     99:                rbp->write_enable = 0xffffffff;
                    100:                rbp->drive = 0x01;
                    101:                break;
                    102:        default:
                    103:                error = EINVAL;
                    104:                break;
                    105:        }
                    106:        return(error);
                    107: }
                    108: 
                    109: #endif

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