587 lines
15 KiB
C
587 lines
15 KiB
C
/* $NetBSD: tga_bt485.c,v 1.2 1996/04/12 06:09:16 cgd 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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#include <sys/param.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 <dev/pci/pcivar.h>
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#include <machine/tgareg.h>
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#include <alpha/pci/tgavar.h>
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#include <alpha/pci/bt485reg.h>
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#include <machine/fbio.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 tga_bt485_init __P((struct tga_devconfig *, int));
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int tga_bt485_intr __P((void *));
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int tga_bt485_set_cmap __P((struct tga_devconfig *, struct fbcmap *));
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int tga_bt485_get_cmap __P((struct tga_devconfig *, struct fbcmap *));
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int tga_bt485_set_cursor __P((struct tga_devconfig *, struct fbcursor *));
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int tga_bt485_get_cursor __P((struct tga_devconfig *, struct fbcursor *));
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int tga_bt485_set_curpos __P((struct tga_devconfig *, struct fbcurpos *));
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int tga_bt485_get_curpos __P((struct tga_devconfig *, struct fbcurpos *));
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int tga_bt485_get_curmax __P((struct tga_devconfig *, struct fbcurpos *));
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const struct tga_ramdac_conf tga_ramdac_bt485 = {
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"Bt485",
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tga_bt485_init,
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tga_bt485_intr,
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tga_bt485_set_cmap,
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tga_bt485_get_cmap,
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tga_bt485_set_cursor,
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tga_bt485_get_cursor,
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tga_bt485_set_curpos,
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tga_bt485_get_curpos,
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tga_bt485_get_curmax,
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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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int changed; /* what changed; see below */
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int curenb; /* cursor enabled */
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struct fbcurpos curpos; /* current cursor position */
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struct fbcurpos 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 fbcurpos 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 tga_bt485_wr_d __P((volatile tga_reg_t *, u_int, u_int8_t));
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inline u_int8_t tga_bt485_rd_d __P((volatile tga_reg_t *, u_int));
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inline void tga_bt485_wr_i __P((volatile tga_reg_t *, u_int8_t, u_int8_t));
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inline u_int8_t tga_bt485_rd_i __P((volatile tga_reg_t *, u_int8_t));
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void tga_bt485_update __P((struct tga_devconfig *, struct bt485data *));
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void tga_bt485_update_curpos __P((struct tga_devconfig *, struct bt485data *));
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#define tga_bt485_sched_update(dc) \
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((dc)->dc_regs[TGA_REG_SISR] = 0x00010000) /* XXX */
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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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void
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tga_bt485_init(dc, alloc)
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struct tga_devconfig *dc;
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int alloc;
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{
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u_int8_t regval;
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struct bt485data tmp, *data;
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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 = tga_bt485_rd_d(dc->dc_regs, BT485_REG_COMMAND_0);
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regval |= 0x80;
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_COMMAND_0, regval);
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/* Set the RAMDAC to 8BPP (no interestion options). */
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_COMMAND_1, 0x40);
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/* Disable the cursor (for now) */
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regval = tga_bt485_rd_d(dc->dc_regs, BT485_REG_COMMAND_2);
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regval &= ~0x03;
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_COMMAND_2, regval);
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/* Use a 64x64x2 cursor */
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regval = tga_bt485_rd_d(dc->dc_regs, BT485_IREG_COMMAND_3);
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regval |= 0x04;
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tga_bt485_wr_d(dc->dc_regs, BT485_IREG_COMMAND_3, regval);
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/*
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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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if (alloc) {
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if (dc->dc_ramdac_private != NULL)
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panic("tga_bt485_init: already have private struct");
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dc->dc_ramdac_private = malloc(sizeof *data, M_DEVBUF,
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M_WAITOK);
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}
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if (dc->dc_ramdac_private != NULL)
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data = dc->dc_ramdac_private;
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else
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data = &tmp;
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/*
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* Initalize 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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tga_bt485_update(dc, data);
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dc->dc_regs[TGA_REG_SISR] = 0x00000001; /* XXX */
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}
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int
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tga_bt485_set_cmap(dc, fbc)
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struct tga_devconfig *dc;
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struct fbcmap *fbc;
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{
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struct bt485data *data = dc->dc_ramdac_private;
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int error, count, index, s;
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if ((u_int)fbc->index >= 256 ||
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((u_int)fbc->index + (u_int)fbc->count) > 256)
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return (EINVAL);
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if (!useracc(fbc->red, fbc->count, B_READ) ||
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!useracc(fbc->green, fbc->count, B_READ) ||
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!useracc(fbc->blue, fbc->count, B_READ))
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return (EFAULT);
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s = spltty();
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index = fbc->index;
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count = fbc->count;
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copyin(fbc->red, &data->cmap_r[index], count);
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copyin(fbc->green, &data->cmap_g[index], count);
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copyin(fbc->blue, &data->cmap_b[index], count);
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data->changed |= DATA_CMAP_CHANGED;
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tga_bt485_sched_update(dc);
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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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tga_bt485_get_cmap(dc, fbc)
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struct tga_devconfig *dc;
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struct fbcmap *fbc;
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{
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struct bt485data *data = dc->dc_ramdac_private;
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int error, count, index;
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if ((u_int)fbc->index >= 256 ||
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((u_int)fbc->index + (u_int)fbc->count) > 256)
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return (EINVAL);
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count = fbc->count;
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index = fbc->index;
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error = copyout(&data->cmap_r[index], fbc->red, count);
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if (error)
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return (error);
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error = copyout(&data->cmap_g[index], fbc->green, count);
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if (error)
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return (error);
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error = copyout(&data->cmap_b[index], fbc->blue, count);
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return (error);
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}
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int
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tga_bt485_set_cursor(dc, fbc)
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struct tga_devconfig *dc;
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struct fbcursor *fbc;
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{
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struct bt485data *data = dc->dc_ramdac_private;
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int error, count, index, v, s;
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v = fbc->set;
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/*
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* For SETCMAP and SETSHAPE, 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 & FB_CUR_SETCMAP) {
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if ((u_int)fbc->cmap.index > 2 ||
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((u_int)fbc->cmap.index + (u_int)fbc->cmap.count) > 2)
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return (EINVAL);
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count = fbc->cmap.count;
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if (!useracc(fbc->cmap.red, count, B_READ) ||
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!useracc(fbc->cmap.green, count, B_READ) ||
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!useracc(fbc->cmap.blue, count, B_READ))
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return (EFAULT);
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}
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if (v & FB_CUR_SETSHAPE) {
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if ((u_int)fbc->size.x > CURSOR_MAX_SIZE ||
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(u_int)fbc->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 (!useracc(fbc->image, count, B_READ) ||
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!useracc(fbc->mask, count, B_READ))
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return (EFAULT);
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}
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if (v & (FB_CUR_SETPOS | FB_CUR_SETCUR)) {
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if (v & FB_CUR_SETPOS)
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data->curpos = fbc->pos;
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if (v & FB_CUR_SETCUR)
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data->curhot = fbc->hot;
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tga_bt485_update_curpos(dc, 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 & FB_CUR_SETCUR) {
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data->curenb = fbc->enable;
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data->changed |= DATA_ENB_CHANGED;
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}
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if (v & FB_CUR_SETCMAP) {
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count = fbc->cmap.count;
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index = fbc->cmap.index;
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copyin(fbc->cmap.red, &data->cmap_r[index], count);
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copyin(fbc->cmap.green, &data->cmap_g[index], count);
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copyin(fbc->cmap.blue, &data->cmap_b[index], count);
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data->changed |= DATA_CURCMAP_CHANGED;
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}
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if (v & FB_CUR_SETSHAPE) {
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data->cursize = fbc->size;
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count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
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bzero(data->curimage, sizeof data->curimage);
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bzero(data->curmask, sizeof data->curmask);
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copyin(fbc->image, data->curimage, count); /* can't fail */
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copyin(fbc->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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tga_bt485_sched_update(dc);
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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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tga_bt485_get_cursor(dc, fbc)
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struct tga_devconfig *dc;
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struct fbcursor *fbc;
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{
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struct bt485data *data = dc->dc_ramdac_private;
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int error, count;
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fbc->set = FB_CUR_SETALL; /* we return everything they want */
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fbc->enable = data->curenb; /* SETCUR */
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fbc->pos = data->curpos; /* SETPOS */
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fbc->hot = data->curhot; /* SETHOT */
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fbc->cmap.index = 0; /* SETCMAP */
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fbc->cmap.count = 2;
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if (fbc->cmap.red != NULL) {
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error = copyout(data->curcmap_r, fbc->cmap.red, 2);
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if (error)
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return (error);
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}
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if (fbc->cmap.green != NULL) {
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error = copyout(data->curcmap_g, fbc->cmap.green, 2);
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if (error)
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return (error);
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}
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if (fbc->cmap.blue != NULL) {
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error = copyout(data->curcmap_b, fbc->cmap.blue, 2);
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if (error)
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return (error);
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}
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fbc->size = data->cursize; /* SETSHAPE */
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if (fbc->image != NULL) {
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count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
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error = copyout(data->curimage, fbc->image, count);
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if (error)
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return (error);
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error = copyout(data->curmask, fbc->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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tga_bt485_set_curpos(dc, fbp)
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struct tga_devconfig *dc;
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struct fbcurpos *fbp;
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{
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struct bt485data *data = dc->dc_ramdac_private;
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data->curpos = *fbp;
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tga_bt485_update_curpos(dc, data);
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return (0);
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}
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int
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tga_bt485_get_curpos(dc, fbp)
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struct tga_devconfig *dc;
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struct fbcurpos *fbp;
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{
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struct bt485data *data = dc->dc_ramdac_private;
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*fbp = data->curpos;
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return (0);
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}
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int
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tga_bt485_get_curmax(dc, fbp)
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struct tga_devconfig *dc;
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struct fbcurpos *fbp;
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{
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struct bt485data *data = dc->dc_ramdac_private;
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fbp->x = fbp->y = CURSOR_MAX_SIZE;
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return (0);
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}
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int
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tga_bt485_intr(v)
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void *v;
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{
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struct tga_devconfig *dc = v;
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if ((dc->dc_regs[TGA_REG_SISR] & 0x00010001) != 0x00010001)
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return 0;
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tga_bt485_update(dc, dc->dc_ramdac_private);
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dc->dc_regs[TGA_REG_SISR] = 0x00000001;
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return (1);
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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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tga_bt485_wr_d(tgaregs, btreg, val)
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volatile tga_reg_t *tgaregs;
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u_int btreg;
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u_int8_t val;
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{
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if (btreg > BT485_REG_MAX)
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panic("tga_bt485_wr_d: reg %d out of range\n", btreg);
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tgaregs[TGA_REG_EPDR] = (btreg << 9) | (0 << 8 ) | val; /* XXX */
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wbflush();
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}
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inline u_int8_t
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tga_bt485_rd_d(tgaregs, btreg)
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volatile tga_reg_t *tgaregs;
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u_int btreg;
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{
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tga_reg_t rdval;
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if (btreg > BT485_REG_MAX)
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panic("tga_bt485_rd_d: reg %d out of range\n", btreg);
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tgaregs[TGA_REG_EPSR] = (btreg << 1) | 0x1; /* XXX */
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wbflush();
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rdval = tgaregs[TGA_REG_EPDR];
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return (rdval >> 16) & 0xff; /* XXX */
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}
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inline void
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tga_bt485_wr_i(tgaregs, ireg, val)
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volatile tga_reg_t *tgaregs;
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u_int8_t ireg;
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u_int8_t val;
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{
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tga_bt485_wr_d(tgaregs, BT485_REG_PCRAM_WRADDR, ireg);
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tga_bt485_wr_d(tgaregs, BT485_REG_EXTENDED, val);
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}
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inline u_int8_t
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tga_bt485_rd_i(tgaregs, ireg)
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volatile tga_reg_t *tgaregs;
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u_int8_t ireg;
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{
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tga_bt485_wr_d(tgaregs, BT485_REG_PCRAM_WRADDR, ireg);
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return (tga_bt485_rd_d(tgaregs, BT485_REG_EXTENDED));
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}
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void
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tga_bt485_update(dc, data)
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struct tga_devconfig *dc;
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struct bt485data *data;
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{
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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 = tga_bt485_rd_d(dc->dc_regs, 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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tga_bt485_wr_d(dc->dc_regs, 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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tga_bt485_wr_d(dc->dc_regs, BT485_REG_COC_WRADDR, 0x01);
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|
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/* spit out the cursor data */
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for (i = 0; i < 2; i++) {
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_COCDATA,
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data->curcmap_r[i]);
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_COCDATA,
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data->curcmap_g[i]);
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_COCDATA,
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data->curcmap_b[i]);
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}
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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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/*
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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 = tga_bt485_rd_i(dc->dc_regs,
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BT485_IREG_COMMAND_3);
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regval &= ~0x03;
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tga_bt485_wr_i(dc->dc_regs, BT485_IREG_COMMAND_3,
|
|
regval);
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_PCRAM_WRADDR, 0);
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for (i = 0; i < count; i++)
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_RAM,
|
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data->curimage[i]);
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|
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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 = tga_bt485_rd_i(dc->dc_regs,
|
|
BT485_IREG_COMMAND_3);
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regval &= ~0x03; regval |= 0x02;
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tga_bt485_wr_i(dc->dc_regs, BT485_IREG_COMMAND_3,
|
|
regval);
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_PCRAM_WRADDR, 0);
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for (i = 0; i < count; i++)
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tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_RAM,
|
|
data->curmask[i]);
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|
|
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/* set addr[9:0] back to 0 */
|
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regval = tga_bt485_rd_i(dc->dc_regs, BT485_IREG_COMMAND_3);
|
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regval &= ~0x03;
|
|
tga_bt485_wr_i(dc->dc_regs, BT485_IREG_COMMAND_3, regval);
|
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}
|
|
|
|
if (v & DATA_CMAP_CHANGED) {
|
|
/* addr[9:0] assumed to be 0 */
|
|
/* set addr[7:0] to 0 */
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_PCRAM_WRADDR, 0x00);
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|
|
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/* spit out the cursor data */
|
|
for (i = 0; i < 256; i++) {
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_PALETTE,
|
|
data->cmap_r[i]);
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_PALETTE,
|
|
data->cmap_g[i]);
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_PALETTE,
|
|
data->cmap_b[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
tga_bt485_update_curpos(dc, data)
|
|
struct tga_devconfig *dc;
|
|
struct bt485data *data;
|
|
{
|
|
int s, x, y;
|
|
|
|
s = spltty();
|
|
|
|
x = data->curpos.x + CURSOR_MAX_SIZE - data->curhot.x;
|
|
y = data->curpos.y + CURSOR_MAX_SIZE - data->curhot.y;
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_X_LOW, x & 0xff);
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f);
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_Y_LOW, y & 0xff);
|
|
tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f);
|
|
|
|
splx(s);
|
|
}
|