606 lines
16 KiB
C
606 lines
16 KiB
C
/* $NetBSD: bt485.c,v 1.9 2002/08/03 00:13:03 itojun Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/* This code was derived from and originally located in sys/dev/pci/
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* NetBSD: tga_bt485.c,v 1.4 1999/03/24 05:51:21 mrg Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: bt485.c,v 1.9 2002/08/03 00:13:03 itojun Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/buf.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <uvm/uvm_extern.h>
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#include <dev/pci/pcivar.h>
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#include <dev/ic/bt485reg.h>
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#include <dev/ic/bt485var.h>
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#include <dev/ic/ramdac.h>
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#include <dev/wscons/wsconsio.h>
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/*
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* Functions exported via the RAMDAC configuration table.
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*/
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void bt485_init __P((struct ramdac_cookie *));
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int bt485_set_cmap __P((struct ramdac_cookie *,
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struct wsdisplay_cmap *));
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int bt485_get_cmap __P((struct ramdac_cookie *,
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struct wsdisplay_cmap *));
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int bt485_set_cursor __P((struct ramdac_cookie *,
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struct wsdisplay_cursor *));
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int bt485_get_cursor __P((struct ramdac_cookie *,
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struct wsdisplay_cursor *));
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int bt485_set_curpos __P((struct ramdac_cookie *,
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struct wsdisplay_curpos *));
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int bt485_get_curpos __P((struct ramdac_cookie *,
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struct wsdisplay_curpos *));
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int bt485_get_curmax __P((struct ramdac_cookie *,
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struct wsdisplay_curpos *));
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/* XXX const */
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struct ramdac_funcs bt485_funcsstruct = {
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"Bt485",
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bt485_register,
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bt485_init,
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bt485_set_cmap,
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bt485_get_cmap,
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bt485_set_cursor,
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bt485_get_cursor,
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bt485_set_curpos,
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bt485_get_curpos,
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bt485_get_curmax,
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NULL, /* check_curcmap; not needed */
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NULL, /* set_curcmap; not needed */
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NULL, /* get_curcmap; not needed */
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NULL, /* no dot clock to set */
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};
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/*
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* Private data.
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*/
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struct bt485data {
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void *cookie; /* This is what is passed
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* around, and is probably
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* struct tga_devconfig *
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*/
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int (*ramdac_sched_update) __P((void *, void (*)(void *)));
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void (*ramdac_wr) __P((void *, u_int, u_int8_t));
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u_int8_t (*ramdac_rd) __P((void *, u_int));
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int changed; /* what changed; see below */
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int curenb; /* cursor enabled */
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struct wsdisplay_curpos curpos; /* current cursor position */
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struct wsdisplay_curpos curhot; /* cursor hotspot */
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char curcmap_r[2]; /* cursor colormap */
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char curcmap_g[2];
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char curcmap_b[2];
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struct wsdisplay_curpos cursize; /* current cursor size */
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char curimage[512]; /* cursor image data */
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char curmask[512]; /* cursor mask data */
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char cmap_r[256]; /* colormap */
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char cmap_g[256];
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char cmap_b[256];
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};
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#define DATA_ENB_CHANGED 0x01 /* cursor enable changed */
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#define DATA_CURCMAP_CHANGED 0x02 /* cursor colormap changed */
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#define DATA_CURSHAPE_CHANGED 0x04 /* cursor size, image, mask changed */
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#define DATA_CMAP_CHANGED 0x08 /* colormap changed */
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#define DATA_ALL_CHANGED 0x0f
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#define CURSOR_MAX_SIZE 64
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/*
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* Internal functions.
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*/
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inline void bt485_wr_i __P((struct bt485data *, u_int8_t, u_int8_t));
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inline u_int8_t bt485_rd_i __P((struct bt485data *, u_int8_t));
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void bt485_update __P((void *));
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void bt485_update_curpos __P((struct bt485data *));
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/*****************************************************************************/
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/*
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* Functions exported via the RAMDAC configuration table.
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*/
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struct ramdac_funcs *
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bt485_funcs(void)
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{
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return &bt485_funcsstruct;
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}
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struct ramdac_cookie *
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bt485_register(v, sched_update, wr, rd)
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void *v;
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int (*sched_update)(void *, void (*)(void *));
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void (*wr)(void *, u_int, u_int8_t);
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u_int8_t (*rd)(void *, u_int);
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{
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struct bt485data *data;
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/*
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* XXX -- comment out of date. rcd.
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* If we should allocate a new private info struct, do so.
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* Otherwise, use the one we have (if it's there), or
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* use the temporary one on the stack.
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*/
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data = malloc(sizeof *data, M_DEVBUF, M_WAITOK);
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/* XXX -- if !data */
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data->cookie = v;
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data->ramdac_sched_update = sched_update;
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data->ramdac_wr = wr;
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data->ramdac_rd = rd;
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return (struct ramdac_cookie *)data;
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}
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/*
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* This function exists solely to provide a means to init
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* the RAMDAC without first registering. It is useful for
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* initializing the console early on.
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*/
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void
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bt485_cninit(v, sched_update, wr, rd)
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void *v;
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int (*sched_update)(void *, void (*)(void *));
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void (*wr)(void *, u_int, u_int8_t);
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u_int8_t (*rd)(void *, u_int);
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{
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struct bt485data tmp, *data = &tmp;
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data->cookie = v;
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data->ramdac_sched_update = sched_update;
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data->ramdac_wr = wr;
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data->ramdac_rd = rd;
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bt485_init((struct ramdac_cookie *)data);
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}
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void
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bt485_init(rc)
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struct ramdac_cookie *rc;
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{
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u_int8_t regval;
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struct bt485data *data = (struct bt485data *)rc;
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int i;
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/*
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* Init the BT485 for normal operation.
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*/
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/*
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* Allow indirect register access. (Actually, this is
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* already enabled. In fact, if it is _disabled_, for
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* some reason the monitor appears to lose sync!!! (?!?!)
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*/
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regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_0);
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regval |= 0x80;
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/*
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* Set the RAMDAC to 8 bit resolution, rather than 6 bit
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* resolution.
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*/
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regval |= 0x02;
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data->ramdac_wr(data->cookie, BT485_REG_COMMAND_0, regval);
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/* Set the RAMDAC to 8BPP (no interestion options). */
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data->ramdac_wr(data->cookie, BT485_REG_COMMAND_1, 0x40);
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/* Disable the cursor (for now) */
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regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2);
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regval &= ~0x03;
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regval |= 0x24;
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data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval);
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/* Use a 64x64x2 cursor */
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regval = bt485_rd_i(data, BT485_IREG_COMMAND_3);
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regval |= 0x04;
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regval |= 0x08;
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bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
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/* Set the Pixel Mask to something useful */
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data->ramdac_wr(data->cookie, BT485_REG_PIXMASK, 0xff);
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/*
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* Initialize the RAMDAC info struct to hold all of our
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* data, and fill it in.
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*/
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data->changed = DATA_ALL_CHANGED;
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data->curenb = 0; /* cursor disabled */
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data->curpos.x = data->curpos.y = 0; /* right now at 0,0 */
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data->curhot.x = data->curhot.y = 0; /* hot spot at 0,0 */
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/* initial cursor colormap: 0 is black, 1 is white */
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data->curcmap_r[0] = data->curcmap_g[0] = data->curcmap_b[0] = 0;
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data->curcmap_r[1] = data->curcmap_g[1] = data->curcmap_b[1] = 0xff;
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/* initial cursor data: 64x64 block of white. */
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data->cursize.x = data->cursize.y = 64;
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for (i = 0; i < 512; i++)
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data->curimage[i] = data->curmask[i] = 0xff;
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/* Initial colormap: 0 is black, everything else is white */
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data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0;
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for (i = 1; i < 256; i++)
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data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 255;
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bt485_update((void *)data);
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}
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int
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bt485_set_cmap(rc, cmapp)
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struct ramdac_cookie *rc;
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struct wsdisplay_cmap *cmapp;
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{
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struct bt485data *data = (struct bt485data *)rc;
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u_int count, index;
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int s;
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if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index)
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return (EINVAL);
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if (!uvm_useracc(cmapp->red, cmapp->count, B_READ) ||
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!uvm_useracc(cmapp->green, cmapp->count, B_READ) ||
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!uvm_useracc(cmapp->blue, cmapp->count, B_READ))
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return (EFAULT);
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s = spltty();
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index = cmapp->index;
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count = cmapp->count;
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copyin(cmapp->red, &data->cmap_r[index], count);
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copyin(cmapp->green, &data->cmap_g[index], count);
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copyin(cmapp->blue, &data->cmap_b[index], count);
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data->changed |= DATA_CMAP_CHANGED;
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data->ramdac_sched_update(data->cookie, bt485_update);
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splx(s);
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return (0);
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}
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int
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bt485_get_cmap(rc, cmapp)
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struct ramdac_cookie *rc;
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struct wsdisplay_cmap *cmapp;
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{
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struct bt485data *data = (struct bt485data *)rc;
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u_int count, index;
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int error;
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if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index )
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return (EINVAL);
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count = cmapp->count;
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index = cmapp->index;
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error = copyout(&data->cmap_r[index], cmapp->red, count);
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if (error)
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return (error);
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error = copyout(&data->cmap_g[index], cmapp->green, count);
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if (error)
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return (error);
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error = copyout(&data->cmap_b[index], cmapp->blue, count);
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return (error);
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}
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int
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bt485_set_cursor(rc, cursorp)
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struct ramdac_cookie *rc;
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struct wsdisplay_cursor *cursorp;
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{
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struct bt485data *data = (struct bt485data *)rc;
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u_int count, index, v;
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int s;
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v = cursorp->which;
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/*
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* For DOCMAP and DOSHAPE, verify that parameters are OK
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* before we do anything that we can't recover from.
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*/
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if (v & WSDISPLAY_CURSOR_DOCMAP) {
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if (cursorp->cmap.index > 2 ||
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(cursorp->cmap.index + cursorp->cmap.count) > 2)
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return (EINVAL);
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count = cursorp->cmap.count;
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if (!uvm_useracc(cursorp->cmap.red, count, B_READ) ||
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!uvm_useracc(cursorp->cmap.green, count, B_READ) ||
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!uvm_useracc(cursorp->cmap.blue, count, B_READ))
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return (EFAULT);
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}
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if (v & WSDISPLAY_CURSOR_DOSHAPE) {
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if (cursorp->size.x > CURSOR_MAX_SIZE ||
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cursorp->size.y > CURSOR_MAX_SIZE)
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return (EINVAL);
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count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
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if (!uvm_useracc(cursorp->image, count, B_READ) ||
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!uvm_useracc(cursorp->mask, count, B_READ))
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return (EFAULT);
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}
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if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) {
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if (v & WSDISPLAY_CURSOR_DOPOS)
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data->curpos = cursorp->pos;
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if (v & WSDISPLAY_CURSOR_DOCUR)
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data->curhot = cursorp->hot;
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bt485_update_curpos(data);
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}
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s = spltty();
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/* Parameters are OK; perform the requested operations. */
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if (v & WSDISPLAY_CURSOR_DOCUR) {
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data->curenb = cursorp->enable;
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data->changed |= DATA_ENB_CHANGED;
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}
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if (v & WSDISPLAY_CURSOR_DOCMAP) {
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count = cursorp->cmap.count;
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index = cursorp->cmap.index;
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copyin(cursorp->cmap.red, &data->curcmap_r[index], count);
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copyin(cursorp->cmap.green, &data->curcmap_g[index], count);
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copyin(cursorp->cmap.blue, &data->curcmap_b[index], count);
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data->changed |= DATA_CURCMAP_CHANGED;
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}
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if (v & WSDISPLAY_CURSOR_DOSHAPE) {
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data->cursize = cursorp->size;
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count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
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memset(data->curimage, 0, sizeof data->curimage);
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memset(data->curmask, 0, sizeof data->curmask);
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copyin(cursorp->image, data->curimage, count); /* can't fail */
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copyin(cursorp->mask, data->curmask, count); /* can't fail */
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data->changed |= DATA_CURSHAPE_CHANGED;
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}
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if (data->changed)
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data->ramdac_sched_update(data->cookie, bt485_update);
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splx(s);
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return (0);
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}
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int
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bt485_get_cursor(rc, cursorp)
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struct ramdac_cookie *rc;
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struct wsdisplay_cursor *cursorp;
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{
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struct bt485data *data = (struct bt485data *)rc;
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int error, count;
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/* we return everything they want */
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cursorp->which = WSDISPLAY_CURSOR_DOALL;
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cursorp->enable = data->curenb; /* DOCUR */
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cursorp->pos = data->curpos; /* DOPOS */
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cursorp->hot = data->curhot; /* DOHOT */
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cursorp->cmap.index = 0; /* DOCMAP */
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cursorp->cmap.count = 2;
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if (cursorp->cmap.red != NULL) {
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error = copyout(data->curcmap_r, cursorp->cmap.red, 2);
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if (error)
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return (error);
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}
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if (cursorp->cmap.green != NULL) {
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error = copyout(data->curcmap_g, cursorp->cmap.green, 2);
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if (error)
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return (error);
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}
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if (cursorp->cmap.blue != NULL) {
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error = copyout(data->curcmap_b, cursorp->cmap.blue, 2);
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if (error)
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return (error);
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}
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cursorp->size = data->cursize; /* DOSHAPE */
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if (cursorp->image != NULL) {
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count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
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error = copyout(data->curimage, cursorp->image, count);
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if (error)
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return (error);
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error = copyout(data->curmask, cursorp->mask, count);
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if (error)
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return (error);
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}
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return (0);
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}
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int
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bt485_set_curpos(rc, curposp)
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struct ramdac_cookie *rc;
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struct wsdisplay_curpos *curposp;
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{
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struct bt485data *data = (struct bt485data *)rc;
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data->curpos = *curposp;
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bt485_update_curpos(data);
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return (0);
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}
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int
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bt485_get_curpos(rc, curposp)
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struct ramdac_cookie *rc;
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struct wsdisplay_curpos *curposp;
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{
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struct bt485data *data = (struct bt485data *)rc;
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*curposp = data->curpos;
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return (0);
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}
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int
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bt485_get_curmax(rc, curposp)
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struct ramdac_cookie *rc;
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struct wsdisplay_curpos *curposp;
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{
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curposp->x = curposp->y = CURSOR_MAX_SIZE;
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return (0);
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}
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/*****************************************************************************/
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/*
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* Internal functions.
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*/
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inline void
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bt485_wr_i(data, ireg, val)
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struct bt485data *data;
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u_int8_t ireg;
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u_int8_t val;
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{
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data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg);
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data->ramdac_wr(data->cookie, BT485_REG_EXTENDED, val);
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}
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inline u_int8_t
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bt485_rd_i(data, ireg)
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struct bt485data *data;
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u_int8_t ireg;
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{
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data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg);
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return (data->ramdac_rd(data->cookie, BT485_REG_EXTENDED));
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}
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void
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bt485_update(vp)
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void *vp;
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{
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struct bt485data *data = vp;
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u_int8_t regval;
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int count, i, v;
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v = data->changed;
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data->changed = 0;
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if (v & DATA_ENB_CHANGED) {
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regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2);
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if (data->curenb)
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regval |= 0x01;
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else
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regval &= ~0x03;
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data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval);
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}
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if (v & DATA_CURCMAP_CHANGED) {
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/* addr[9:0] assumed to be 0 */
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/* set addr[7:0] to 1 */
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data->ramdac_wr(data->cookie, BT485_REG_COC_WRADDR, 0x01);
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/* spit out the cursor data */
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for (i = 0; i < 2; i++) {
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data->ramdac_wr(data->cookie, BT485_REG_COCDATA,
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data->curcmap_r[i]);
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data->ramdac_wr(data->cookie, BT485_REG_COCDATA,
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data->curcmap_g[i]);
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data->ramdac_wr(data->cookie, BT485_REG_COCDATA,
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data->curcmap_b[i]);
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}
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}
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if (v & DATA_CURSHAPE_CHANGED) {
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count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
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/*
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* Write the cursor image data:
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* set addr[9:8] to 0,
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* set addr[7:0] to 0,
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* spit it all out.
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*/
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regval = bt485_rd_i(data, BT485_IREG_COMMAND_3);
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regval &= ~0x03;
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bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
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data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0);
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for (i = 0; i < count; i++)
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data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM,
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data->curimage[i]);
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/*
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* Write the cursor mask data:
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* set addr[9:8] to 2,
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* set addr[7:0] to 0,
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* spit it all out.
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*/
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regval = bt485_rd_i(data, BT485_IREG_COMMAND_3);
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regval &= ~0x03; regval |= 0x02;
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bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
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data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0);
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for (i = 0; i < count; i++)
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data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM,
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data->curmask[i]);
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/* set addr[9:0] back to 0 */
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regval = bt485_rd_i(data, BT485_IREG_COMMAND_3);
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regval &= ~0x03;
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bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
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}
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if (v & DATA_CMAP_CHANGED) {
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/* addr[9:0] assumed to be 0 */
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/* set addr[7:0] to 0 */
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data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0x00);
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/* spit out the cursor data */
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for (i = 0; i < 256; i++) {
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data->ramdac_wr(data->cookie, BT485_REG_PALETTE,
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data->cmap_r[i]);
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data->ramdac_wr(data->cookie, BT485_REG_PALETTE,
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data->cmap_g[i]);
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data->ramdac_wr(data->cookie, BT485_REG_PALETTE,
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data->cmap_b[i]);
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}
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}
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}
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void
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bt485_update_curpos(data)
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struct bt485data *data;
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{
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void *cookie = data->cookie;
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int s, x, y;
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s = spltty();
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x = data->curpos.x + CURSOR_MAX_SIZE - data->curhot.x;
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y = data->curpos.y + CURSOR_MAX_SIZE - data->curhot.y;
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data->ramdac_wr(cookie, BT485_REG_CURSOR_X_LOW, x & 0xff);
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data->ramdac_wr(cookie, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f);
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data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_LOW, y & 0xff);
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data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f);
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splx(s);
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}
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