/* $NetBSD: cfb.c,v 1.45 2005/05/22 15:54:46 christos Exp $ */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell and Rick Macklem. * * 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. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * from: @(#)sfb.c 8.1 (Berkeley) 6/10/93 */ /* * devGraphics.c -- * * This file contains machine-dependent routines for the graphics device. * * Copyright (C) 1989 Digital Equipment Corporation. * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby granted, * provided that the above copyright notice appears in all copies. * Digital Equipment Corporation makes no representations about the * suitability of this software for any purpose. It is provided "as is" * without express or implied warranty. * * from: Header: /sprite/src/kernel/dev/ds3100.md/RCS/devGraphics.c, * v 9.2 90/02/13 22:16:24 shirriff Exp SPRITE (DECWRL)"; */ /* * 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 the * rights to redistribute these changes. */ #include __KERNEL_RCSID(0, "$NetBSD: cfb.c,v 1.45 2005/05/22 15:54:46 christos Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include /* * These need to be mapped into user space. */ static struct fbuaccess cfbu; static struct pmax_fbtty cfbfb; static struct fbinfo *cfb_fi; /* * Method table for standard framebuffer operations on a CFB. * The CFB uses a Brooktree bt479 ramdac. */ struct fbdriver cfb_driver = { bt459_video_on, bt459_video_off, bt459InitColorMap, bt459GetColorMap, bt459LoadColorMap, bt459PosCursor, bt459LoadCursor, bt459CursorColor }; #define CFB_OFFSET_VRAM 0x0 /* from module's base */ #define CFB_OFFSET_BT459 0x200000 /* Bt459 registers */ #define CFB_OFFSET_IREQ 0x300000 /* Interrupt req. control */ #define CFB_OFFSET_ROM 0x380000 /* Diagnostic ROM */ #define CFB_OFFSET_RESET 0x3c0000 /* Bt459 resets on writes */ #define CFB_FB_SIZE 0x100000 /* frame buffer size */ /* * Autoconfiguration data for config.new. * Use static-sized softc until config.old and old autoconfig * code is completely gone. */ static int cfbmatch __P((struct device *, struct cfdata *, void *)); static void cfbattach __P((struct device *, struct device *, void *)); static int cfbinit __P((struct fbinfo *, caddr_t, int, int)); static int cfb_intr __P((void *sc)); CFATTACH_DECL(cfb, sizeof(struct fbsoftc), cfbmatch, cfbattach, NULL, NULL); int cfb_cnattach(addr) paddr_t addr; { struct fbinfo *fi; fbcnalloc(&fi); cfbinit(fi, (caddr_t)addr, 0, 1); cfb_fi = fi; return (1); } static int cfbmatch(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct tc_attach_args *ta = aux; /* make sure that we're looking for this type of device. */ if (!TC_BUS_MATCHNAME(ta, "PMAG-BA ")) return (0); return (1); } /* * Attach a device. Hand off all the work to cfbinit(), * so console-config code can attach cfb devices very early in boot, * to use as system console. */ static void cfbattach(parent, self, aux) struct device *parent; struct device *self; void *aux; { struct tc_attach_args *ta = aux; caddr_t base = (caddr_t)(ta->ta_addr); int unit = self->dv_unit; struct fbinfo *fi; if (cfb_fi) fi = cfb_fi; else { /* Allocate a struct fbinfo and point the softc at it */ if (fballoc(&fi) < 0 || cfbinit(fi, base, unit, 0) < 0) return; /* failed */ } ((struct fbsoftc *)self)->sc_fi = fi; printf(": %dx%dx%d%s", fi->fi_type.fb_width, fi->fi_type.fb_height, fi->fi_type.fb_depth, (cfb_fi) ? " console" : ""); /* * 3MIN does not mask un-established TC option interrupts, * so establish a handler. * XXX Should store cmap updates in softc and apply in the * interrupt handler, which interrupts during vertical-retrace. */ tc_intr_establish(parent, ta->ta_cookie, TC_IPL_NONE, cfb_intr, fi); printf("\n"); } /* * CFB initialization. This is divorced from cfbattch() so that * a console framebuffer can be initialized early during boot. */ static int cfbinit(fi, cfbaddr, unit, silent) struct fbinfo *fi; caddr_t cfbaddr; int unit; int silent; { /* check for no frame buffer */ if (badaddr(cfbaddr, 4)) { printf("cfb: bad address %p\n", cfbaddr); return (0); } /* Fill in main frame buffer info struct. */ fi->fi_unit = unit; fi->fi_pixels = (caddr_t)(cfbaddr + CFB_OFFSET_VRAM); fi->fi_pixelsize = 1024 * 864; fi->fi_base = (caddr_t)(cfbaddr + CFB_OFFSET_VRAM); fi->fi_vdac = (caddr_t)(cfbaddr + CFB_OFFSET_BT459); fi->fi_size = (fi->fi_pixels + CFB_FB_SIZE) - fi->fi_base; fi->fi_linebytes = 1024; fi->fi_driver = &cfb_driver; fi->fi_blanked = 0; /* Fill in Frame Buffer Type struct. */ fi->fi_type.fb_type = PMAX_FBTYPE_CFB; fi->fi_type.fb_width = 1024; fi->fi_type.fb_height = 864; fi->fi_type.fb_depth = 8; fi->fi_type.fb_cmsize = 256; fi->fi_type.fb_size = CFB_FB_SIZE; /* Reset the chip */ if (!bt459init(fi)) { printf("cfb%d: vdac init failed.\n", unit); return (0); } /* * qvss/pm-style mmap()ed event queue compatibility glue */ /* * Must be in Uncached space since the fbuaccess structure is * mapped into the user's address space uncached. */ fi->fi_fbu = (struct fbuaccess *) MIPS_PHYS_TO_KSEG1(MIPS_KSEG0_TO_PHYS(&cfbu)); /* This is glass-tty state but it's in the shared structure. Ick. */ fi->fi_fbu->scrInfo.max_row = 56; fi->fi_fbu->scrInfo.max_col = 80; init_pmaxfbu(fi); /* Initialize old-style pmax glass-tty screen info. */ fi->fi_glasstty = &cfbfb; if (tb_kbdmouseconfig(fi)) return (-1); fbconnect(fi); return (1); } /* * The original TURBOChannel cfb interrupts on every vertical * retrace, and we can't disable the board from requesting those * interrupts. The 4.4BSD kernel never enabled those interrupts; * but there's a kernel design bug on the 3MIN, where disabling * (or enabling) TC option interrupts has no effect the interrupts * are mapped to R3000 interrupts and always seem to be taken. * This function simply dismisses CFB interrupts, or the interrupt * request from the card will still be active. */ static int cfb_intr(sc) void *sc; { struct fbinfo *fi; caddr_t slot_addr; fi = (struct fbinfo *)sc; slot_addr = (((caddr_t)fi->fi_base) - CFB_OFFSET_VRAM); /* reset vertical-retrace interrupt by writing a dont-care */ *(int*) (slot_addr + CFB_OFFSET_IREQ) = 0; return (0); }