/* $NetBSD: grfabs_fal.c,v 1.1 1995/08/20 18:17:32 leo Exp $ */ /* * Copyright (c) 1995 Leo Weppelman. * 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. * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Leo Weppelman. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #ifdef FALCON_VIDEO /* * atari abstract graphics driver: Falcon-interface */ #include #include #include #include #include #include #include #include #include /* * Function decls */ static void init_view __P((view_t *, bmap_t *, dmode_t *, box_t *)); static bmap_t *alloc_bitmap __P((u_long, u_long, u_char)); static colormap_t *alloc_colormap __P((dmode_t *)); static void free_bitmap __P((bmap_t *)); static void falcon_display_view __P((view_t *)); static view_t *falcon_alloc_view __P((dmode_t *, dimen_t *, u_char)); static void falcon_free_view __P((view_t *)); static void falcon_remove_view __P((view_t *)); static int falcon_use_colormap __P((view_t *, colormap_t *)); static void falcon_dedect __P((dmode_t *)); /* * Our function switch table */ struct grfabs_sw fal_vid_sw = { falcon_display_view, falcon_alloc_view, falcon_free_view, falcon_remove_view, falcon_use_colormap }; static dmode_t vid_modes[] = { { { NULL, NULL }, "falauto",{ 0, 0 }, 0, RES_FALAUTO ,&fal_vid_sw}, { { NULL, NULL }, "sthigh", { 640, 400 }, 1, RES_FAL_STHIGH ,&fal_vid_sw}, { { NULL, NULL }, "stmid", { 640, 200 }, 2, RES_FAL_STMID ,&fal_vid_sw}, { { NULL, NULL }, "stlow", { 320, 200 }, 4, RES_FAL_STLOW ,&fal_vid_sw}, { { NULL, NULL }, "ttlow", { 320, 480 }, 8, RES_FAL_TTLOW ,&fal_vid_sw}, { { NULL, NULL }, "vga2", { 640, 480 }, 1, RES_VGA2 ,&fal_vid_sw}, { { NULL, NULL }, "vga4", { 640, 480 }, 2, RES_VGA4 ,&fal_vid_sw}, { { NULL, NULL }, "vga16", { 640, 480 }, 4, RES_VGA16 ,&fal_vid_sw}, { { NULL, NULL }, "vga256", { 640, 480 }, 8, RES_VGA256 ,&fal_vid_sw}, { { NULL, NULL }, "highcol",{ 320, 200 }, 16, RES_DIRECT ,&fal_vid_sw}, { { NULL, NULL }, NULL, } }; /* * XXX: called from ite console init routine. * Initialize list of posible video modes. */ void falcon_probe_video(modelp) MODES *modelp; { dmode_t *dm; int i; /* Currently we support only one mode of the falcon video system. * This is the mode that is initialized before NetBSD starts. This * is possible since the bios has already done that work. */ for (i = 0; (dm = &vid_modes[i])->name != NULL; i++) { if (dm->vm_reg == RES_FALAUTO) { falcon_dedect(dm); LIST_INSERT_HEAD(modelp, dm, link); } } /* * This seems to prevent bordered screens. */ for (i=0; i < 16; i++) VIDEO->vd_fal_rgb[i] = CM_L2FAL(gra_def_color16[i]); } static void falcon_dedect(dm) dmode_t *dm; { u_short falshift, stshift; short interlace, doublescan; interlace = (VIDEO->vd_fal_ctrl & 0x2) >>1; doublescan = VIDEO->vd_fal_ctrl & 0x1; /* * Calculate the depth of the screen */ falshift = VIDEO->vd_fal_res; stshift = VIDEO->vd_st_res; if (falshift & 0x400) /* 2 color */ dm->depth = 1; else if (falshift & 0x100) /* high color, direct */ dm->depth = 16; else if (falshift & 0x10) /* 256 color */ dm->depth = 8; else if (stshift == 0) /* 16 color */ dm->depth = 4; else if (stshift == 1) /* 4 color */ dm->depth = 2; else dm->depth = 1; /* 2 color */ /* * Now calculate the screen hight */ dm->size.height = VIDEO->vd_v_dis_end - VIDEO->vd_v_dis_beg; if (!interlace) dm->size.height >>=1; if (doublescan) dm->size.height >>=1; /* * And the width */ dm->size.width = VIDEO->vd_vert_wrap * 16 / dm->depth; } static void falcon_display_view(v) view_t *v; { dmode_t *dm = v->mode; bmap_t *bm = v->bitmap; if (dm->current_view) { /* * Mark current view for this mode as no longer displayed */ dm->current_view->flags &= ~VF_DISPLAY; } dm->current_view = v; v->flags |= VF_DISPLAY; falcon_use_colormap(v, v->colormap); /* XXX: should use vbl for this */ /* * Falcon: here should set the videl to switch the video mode. * This will be added later. * At the moment we set only the video base. */ VIDEO->vd_raml = (u_long)bm->hw_address & 0xff; VIDEO->vd_ramm = ((u_long)bm->hw_address >> 8) & 0xff; VIDEO->vd_ramh = ((u_long)bm->hw_address >> 16) & 0xff; } static void falcon_remove_view(v) view_t *v; { dmode_t *mode = v->mode; if (mode->current_view == v) { #if 0 if (v->flags & VF_DISPLAY) panic("Cannot shutdown display\n"); /* XXX */ #endif mode->current_view = NULL; } v->flags &= ~VF_DISPLAY; } static void falcon_free_view(v) view_t *v; { if (v) { dmode_t *md = v->mode; falcon_remove_view(v); if (v->colormap != &gra_con_cmap) free(v->colormap, M_DEVBUF); free_bitmap(v->bitmap); if (v != &gra_con_view) free(v, M_DEVBUF); } } static int falcon_use_colormap(v, cm) view_t *v; colormap_t *cm; { dmode_t *dm; volatile u_short *creg; volatile u_long *fcreg; u_long *src; colormap_t *vcm; u_long *vcreg; u_short ncreg; int i; dm = v->mode; vcm = v->colormap; /* * I guess it seems reasonable to require the maps to be * of the same type... */ if (cm->type != vcm->type) return (EINVAL); /* * First get the colormap addresses an calculate * howmany colors are in it. */ if (dm->depth == 16) /* direct color, no colormap; but also not (yet) supported */ return(0); fcreg = &VIDEO->vd_fal_rgb[0]; creg = &VIDEO->vd_st_rgb[0]; ncreg = 1 << dm->depth; /* If first entry specified beyond capabilities -> error */ if (cm->first >= ncreg) return (EINVAL); /* * A little tricky, the actual colormap pointer will be NULL * when view is not displaying, valid otherwise. */ if (v->flags & VF_DISPLAY) creg = &creg[cm->first]; else creg = NULL; vcreg = &vcm->entry[cm->first]; ncreg -= cm->first; if (cm->size > ncreg) return (EINVAL); ncreg = cm->size; for (i = 0, src = cm->entry; i < ncreg; i++, vcreg++) { *vcreg = *src++; /* * If displaying, also update actual color register. */ if (creg != NULL) { *fcreg++ = CM_L2FAL(*vcreg); if (i < 16 ) *creg++ = CM_L2ST(*vcreg); } } return (0); } static view_t * falcon_alloc_view(mode, dim, depth) dmode_t *mode; dimen_t *dim; u_char depth; { view_t *v; bmap_t *bm; if (!atari_realconfig) v = &gra_con_view; else v = malloc(sizeof(*v), M_DEVBUF, M_NOWAIT); if (v == NULL) return(NULL); bm = alloc_bitmap(mode->size.width, mode->size.height, mode->depth); if (bm) { box_t box; v->colormap = alloc_colormap(mode); if (v->colormap) { INIT_BOX(&box,0,0,mode->size.width,mode->size.height); init_view(v, bm, mode, &box); return(v); } free_bitmap(bm); } if (v != &gra_con_view) free(v, M_DEVBUF); return (NULL); } static void init_view(v, bm, mode, dbox) view_t *v; bmap_t *bm; dmode_t *mode; box_t *dbox; { v->bitmap = bm; v->mode = mode; v->flags = 0; bcopy(dbox, &v->display, sizeof(box_t)); } /* bitmap functions */ static bmap_t * alloc_bitmap(width, height, depth) u_long width, height; u_char depth; { int i; u_long total_size, bm_size; void *hw_address; bmap_t *bm; /* * Sigh, it seems for mapping to work we need the bitplane data to * 1: be aligned on a page boundry. * 2: be n pages large. * * why? because the user gets a page aligned address, if this is before * your allocation, too bad. Also it seems that the mapping routines * do not watch to closely to the allowable length. so if you go over * n pages by less than another page, the user gets to write all over * the entire page. Since you did not allocate up to a page boundry * (or more) the user writes into someone elses memory. -ch */ bm_size = atari_round_page((width * height * depth) / NBBY); total_size = bm_size + sizeof(bmap_t) + NBPG; if ((bm = (bmap_t*)alloc_stmem(total_size, &hw_address)) == NULL) return(NULL); bm->plane = (u_char*)bm + sizeof(bmap_t); bm->plane = (u_char*)atari_round_page(bm->plane); bm->hw_address = (u_char*)hw_address + sizeof(bmap_t); bm->hw_address = (u_char*)atari_round_page(bm->hw_address); bm->bytes_per_row = (width * depth) / NBBY; bm->rows = height; bm->depth = depth; bzero(bm->plane, bm_size); return (bm); } static void free_bitmap(bm) bmap_t *bm; { if (bm) free_stmem(bm); } static colormap_t * alloc_colormap(dm) dmode_t *dm; { int nentries, i; colormap_t *cm; u_char type = CM_COLOR; if (dm->depth == 16) /* direct color, no colormap; not (yet) supported */ nentries = 0; else nentries = 1 << dm->depth; if (!atari_realconfig) { cm = &gra_con_cmap; cm->entry = gra_con_colors; } else { int size; size = sizeof(*cm) + (nentries * sizeof(cm->entry[0])); cm = malloc(size, M_DEVBUF, M_NOWAIT); if (cm == NULL) return(NULL); cm->entry = (long *)&cm[1]; } if ((cm->type = type) == CM_COLOR) cm->red_mask = cm->green_mask = cm->blue_mask = 0x3f; cm->first = 0; cm->size = nentries; for (i = 0; i < nentries; i++) cm->entry[i] = gra_def_color16[i % 16]; return (cm); } #endif /* FALCON_VIDEO */