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NetBSD/sys/dev/pci/tga_bt485.c

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/* $NetBSD: tga_bt485.c,v 1.1 1998/04/15 20:16:32 drochner Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/tgareg.h>
#include <dev/pci/tgavar.h>
#include <dev/ic/bt485reg.h>
#include <dev/wscons/wsconsio.h>
#include "opt_uvm.h"
/*
* Functions exported via the RAMDAC configuration table.
*/
void tga_bt485_init __P((struct tga_devconfig *, int));
int tga_bt485_intr __P((void *));
int tga_bt485_set_cmap __P((struct tga_devconfig *,
struct wsdisplay_cmap *));
int tga_bt485_get_cmap __P((struct tga_devconfig *,
struct wsdisplay_cmap *));
int tga_bt485_set_cursor __P((struct tga_devconfig *,
struct wsdisplay_cursor *));
int tga_bt485_get_cursor __P((struct tga_devconfig *,
struct wsdisplay_cursor *));
int tga_bt485_set_curpos __P((struct tga_devconfig *,
struct wsdisplay_curpos *));
int tga_bt485_get_curpos __P((struct tga_devconfig *,
struct wsdisplay_curpos *));
int tga_bt485_get_curmax __P((struct tga_devconfig *,
struct wsdisplay_curpos *));
const struct tga_ramdac_conf tga_ramdac_bt485 = {
"Bt485",
tga_bt485_init,
tga_bt485_intr,
tga_bt485_set_cmap,
tga_bt485_get_cmap,
tga_bt485_set_cursor,
tga_bt485_get_cursor,
tga_bt485_set_curpos,
tga_bt485_get_curpos,
tga_bt485_get_curmax,
};
/*
* Private data.
*/
struct bt485data {
int changed; /* what changed; see below */
int curenb; /* cursor enabled */
struct wsdisplay_curpos curpos; /* current cursor position */
struct wsdisplay_curpos curhot; /* cursor hotspot */
char curcmap_r[2]; /* cursor colormap */
char curcmap_g[2];
char curcmap_b[2];
struct wsdisplay_curpos cursize; /* current cursor size */
char curimage[512]; /* cursor image data */
char curmask[512]; /* cursor mask data */
char cmap_r[256]; /* colormap */
char cmap_g[256];
char cmap_b[256];
};
#define DATA_ENB_CHANGED 0x01 /* cursor enable changed */
#define DATA_CURCMAP_CHANGED 0x02 /* cursor colormap changed */
#define DATA_CURSHAPE_CHANGED 0x04 /* cursor size, image, mask changed */
#define DATA_CMAP_CHANGED 0x08 /* colormap changed */
#define DATA_ALL_CHANGED 0x0f
#define CURSOR_MAX_SIZE 64
/*
* Internal functions.
*/
inline void tga_bt485_wr_d __P((volatile tga_reg_t *, u_int, u_int8_t));
inline u_int8_t tga_bt485_rd_d __P((volatile tga_reg_t *, u_int));
inline void tga_bt485_wr_i __P((volatile tga_reg_t *, u_int8_t, u_int8_t));
inline u_int8_t tga_bt485_rd_i __P((volatile tga_reg_t *, u_int8_t));
void tga_bt485_update __P((struct tga_devconfig *, struct bt485data *));
void tga_bt485_update_curpos __P((struct tga_devconfig *, struct bt485data *));
#define tga_bt485_sched_update(dc) \
((dc)->dc_regs[TGA_REG_SISR] = 0x00010000) /* XXX */
/*****************************************************************************/
/*
* Functions exported via the RAMDAC configuration table.
*/
void
tga_bt485_init(dc, alloc)
struct tga_devconfig *dc;
int alloc;
{
u_int8_t regval;
struct bt485data tmp, *data;
int i;
/*
* Init the BT485 for normal operation.
*/
/*
* Allow indirect register access. (Actually, this is
* already enabled. In fact, if it is _disabled_, for
* some reason the monitor appears to lose sync!!! (?!?!)
*/
regval = tga_bt485_rd_d(dc->dc_regs, BT485_REG_COMMAND_0);
regval |= 0x80;
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COMMAND_0, regval);
/* Set the RAMDAC to 8BPP (no interestion options). */
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COMMAND_1, 0x40);
/* Disable the cursor (for now) */
regval = tga_bt485_rd_d(dc->dc_regs, BT485_REG_COMMAND_2);
regval &= ~0x03;
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COMMAND_2, regval);
/* Use a 64x64x2 cursor */
regval = tga_bt485_rd_d(dc->dc_regs, BT485_IREG_COMMAND_3);
regval |= 0x04;
tga_bt485_wr_d(dc->dc_regs, BT485_IREG_COMMAND_3, regval);
/*
* If we should allocate a new private info struct, do so.
* Otherwise, use the one we have (if it's there), or
* use the temporary one on the stack.
*/
if (alloc) {
if (dc->dc_ramdac_private != NULL)
panic("tga_bt485_init: already have private struct");
dc->dc_ramdac_private = malloc(sizeof *data, M_DEVBUF,
M_WAITOK);
}
if (dc->dc_ramdac_private != NULL)
data = dc->dc_ramdac_private;
else
data = &tmp;
/*
* Initalize the RAMDAC info struct to hold all of our
* data, and fill it in.
*/
data->changed = DATA_ALL_CHANGED;
data->curenb = 0; /* cursor disabled */
data->curpos.x = data->curpos.y = 0; /* right now at 0,0 */
data->curhot.x = data->curhot.y = 0; /* hot spot at 0,0 */
/* initial cursor colormap: 0 is black, 1 is white */
data->curcmap_r[0] = data->curcmap_g[0] = data->curcmap_b[0] = 0;
data->curcmap_r[1] = data->curcmap_g[1] = data->curcmap_b[1] = 0xff;
/* initial cursor data: 64x64 block of white. */
data->cursize.x = data->cursize.y = 64;
for (i = 0; i < 512; i++)
data->curimage[i] = data->curmask[i] = 0xff;
/* Initial colormap: 0 is black, everything else is white */
data->cmap_r[0] = data->cmap_g[0] = data->cmap_b[0] = 0;
for (i = 1; i < 256; i++)
data->cmap_r[i] = data->cmap_g[i] = data->cmap_b[i] = 255;
tga_bt485_update(dc, data);
dc->dc_regs[TGA_REG_SISR] = 0x00000001; /* XXX */
}
int
tga_bt485_set_cmap(dc, cmapp)
struct tga_devconfig *dc;
struct wsdisplay_cmap *cmapp;
{
struct bt485data *data = dc->dc_ramdac_private;
int count, index, s;
if ((u_int)cmapp->index >= 256 ||
((u_int)cmapp->index + (u_int)cmapp->count) > 256)
return (EINVAL);
#ifdef UVM
if (!uvm_useracc(cmapp->red, cmapp->count, B_READ) ||
!uvm_useracc(cmapp->green, cmapp->count, B_READ) ||
!uvm_useracc(cmapp->blue, cmapp->count, B_READ))
return (EFAULT);
#else
if (!useracc(cmapp->red, cmapp->count, B_READ) ||
!useracc(cmapp->green, cmapp->count, B_READ) ||
!useracc(cmapp->blue, cmapp->count, B_READ))
return (EFAULT);
#endif
s = spltty();
index = cmapp->index;
count = cmapp->count;
copyin(cmapp->red, &data->cmap_r[index], count);
copyin(cmapp->green, &data->cmap_g[index], count);
copyin(cmapp->blue, &data->cmap_b[index], count);
data->changed |= DATA_CMAP_CHANGED;
tga_bt485_sched_update(dc);
splx(s);
return (0);
}
int
tga_bt485_get_cmap(dc, cmapp)
struct tga_devconfig *dc;
struct wsdisplay_cmap *cmapp;
{
struct bt485data *data = dc->dc_ramdac_private;
int error, count, index;
if ((u_int)cmapp->index >= 256 ||
((u_int)cmapp->index + (u_int)cmapp->count) > 256)
return (EINVAL);
count = cmapp->count;
index = cmapp->index;
error = copyout(&data->cmap_r[index], cmapp->red, count);
if (error)
return (error);
error = copyout(&data->cmap_g[index], cmapp->green, count);
if (error)
return (error);
error = copyout(&data->cmap_b[index], cmapp->blue, count);
return (error);
}
int
tga_bt485_set_cursor(dc, cursorp)
struct tga_devconfig *dc;
struct wsdisplay_cursor *cursorp;
{
struct bt485data *data = dc->dc_ramdac_private;
int count, index, v, s;
v = cursorp->which;
/*
* For DOCMAP and DOSHAPE, verify that parameters are OK
* before we do anything that we can't recover from.
*/
if (v & WSDISPLAY_CURSOR_DOCMAP) {
if ((u_int)cursorp->cmap.index > 2 ||
((u_int)cursorp->cmap.index +
(u_int)cursorp->cmap.count) > 2)
return (EINVAL);
count = cursorp->cmap.count;
#ifdef UVM
if (!uvm_useracc(cursorp->cmap.red, count, B_READ) ||
!uvm_useracc(cursorp->cmap.green, count, B_READ) ||
!uvm_useracc(cursorp->cmap.blue, count, B_READ))
return (EFAULT);
#else
if (!useracc(cursorp->cmap.red, count, B_READ) ||
!useracc(cursorp->cmap.green, count, B_READ) ||
!useracc(cursorp->cmap.blue, count, B_READ))
return (EFAULT);
#endif
}
if (v & WSDISPLAY_CURSOR_DOSHAPE) {
if ((u_int)cursorp->size.x > CURSOR_MAX_SIZE ||
(u_int)cursorp->size.y > CURSOR_MAX_SIZE)
return (EINVAL);
count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
#ifdef UVM
if (!uvm_useracc(cursorp->image, count, B_READ) ||
!uvm_useracc(cursorp->mask, count, B_READ))
return (EFAULT);
#else
if (!useracc(cursorp->image, count, B_READ) ||
!useracc(cursorp->mask, count, B_READ))
return (EFAULT);
#endif
}
if (v & (WSDISPLAY_CURSOR_DOPOS | WSDISPLAY_CURSOR_DOCUR)) {
if (v & WSDISPLAY_CURSOR_DOPOS)
data->curpos = cursorp->pos;
if (v & WSDISPLAY_CURSOR_DOCUR)
data->curhot = cursorp->hot;
tga_bt485_update_curpos(dc, data);
}
s = spltty();
/* Parameters are OK; perform the requested operations. */
if (v & WSDISPLAY_CURSOR_DOCUR) {
data->curenb = cursorp->enable;
data->changed |= DATA_ENB_CHANGED;
}
if (v & WSDISPLAY_CURSOR_DOCMAP) {
count = cursorp->cmap.count;
index = cursorp->cmap.index;
copyin(cursorp->cmap.red, &data->cmap_r[index], count);
copyin(cursorp->cmap.green, &data->cmap_g[index], count);
copyin(cursorp->cmap.blue, &data->cmap_b[index], count);
data->changed |= DATA_CURCMAP_CHANGED;
}
if (v & WSDISPLAY_CURSOR_DOSHAPE) {
data->cursize = cursorp->size;
count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
bzero(data->curimage, sizeof data->curimage);
bzero(data->curmask, sizeof data->curmask);
copyin(cursorp->image, data->curimage, count); /* can't fail */
copyin(cursorp->mask, data->curmask, count); /* can't fail */
data->changed |= DATA_CURSHAPE_CHANGED;
}
if (data->changed)
tga_bt485_sched_update(dc);
splx(s);
return (0);
}
int
tga_bt485_get_cursor(dc, cursorp)
struct tga_devconfig *dc;
struct wsdisplay_cursor *cursorp;
{
struct bt485data *data = dc->dc_ramdac_private;
int error, count;
/* we return everything they want */
cursorp->which = WSDISPLAY_CURSOR_DOALL;
cursorp->enable = data->curenb; /* DOCUR */
cursorp->pos = data->curpos; /* DOPOS */
cursorp->hot = data->curhot; /* DOHOT */
cursorp->cmap.index = 0; /* DOCMAP */
cursorp->cmap.count = 2;
if (cursorp->cmap.red != NULL) {
error = copyout(data->curcmap_r, cursorp->cmap.red, 2);
if (error)
return (error);
}
if (cursorp->cmap.green != NULL) {
error = copyout(data->curcmap_g, cursorp->cmap.green, 2);
if (error)
return (error);
}
if (cursorp->cmap.blue != NULL) {
error = copyout(data->curcmap_b, cursorp->cmap.blue, 2);
if (error)
return (error);
}
cursorp->size = data->cursize; /* DOSHAPE */
if (cursorp->image != NULL) {
count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
error = copyout(data->curimage, cursorp->image, count);
if (error)
return (error);
error = copyout(data->curmask, cursorp->mask, count);
if (error)
return (error);
}
return (0);
}
int
tga_bt485_set_curpos(dc, curposp)
struct tga_devconfig *dc;
struct wsdisplay_curpos *curposp;
{
struct bt485data *data = dc->dc_ramdac_private;
data->curpos = *curposp;
tga_bt485_update_curpos(dc, data);
return (0);
}
int
tga_bt485_get_curpos(dc, curposp)
struct tga_devconfig *dc;
struct wsdisplay_curpos *curposp;
{
struct bt485data *data = dc->dc_ramdac_private;
*curposp = data->curpos;
return (0);
}
int
tga_bt485_get_curmax(dc, curposp)
struct tga_devconfig *dc;
struct wsdisplay_curpos *curposp;
{
curposp->x = curposp->y = CURSOR_MAX_SIZE;
return (0);
}
int
tga_bt485_intr(v)
void *v;
{
struct tga_devconfig *dc = v;
if ((dc->dc_regs[TGA_REG_SISR] & 0x00010001) != 0x00010001)
return 0;
tga_bt485_update(dc, dc->dc_ramdac_private);
dc->dc_regs[TGA_REG_SISR] = 0x00000001;
return (1);
}
/*****************************************************************************/
/*
* Internal functions.
*/
inline void
tga_bt485_wr_d(tgaregs, btreg, val)
volatile tga_reg_t *tgaregs;
u_int btreg;
u_int8_t val;
{
if (btreg > BT485_REG_MAX)
panic("tga_bt485_wr_d: reg %d out of range\n", btreg);
tgaregs[TGA_REG_EPDR] = (btreg << 9) | (0 << 8 ) | val; /* XXX */
#ifdef __alpha__
alpha_mb();
#endif
}
inline u_int8_t
tga_bt485_rd_d(tgaregs, btreg)
volatile tga_reg_t *tgaregs;
u_int btreg;
{
tga_reg_t rdval;
if (btreg > BT485_REG_MAX)
panic("tga_bt485_rd_d: reg %d out of range\n", btreg);
tgaregs[TGA_REG_EPSR] = (btreg << 1) | 0x1; /* XXX */
#ifdef __alpha__
alpha_mb();
#endif
rdval = tgaregs[TGA_REG_EPDR];
return (rdval >> 16) & 0xff; /* XXX */
}
inline void
tga_bt485_wr_i(tgaregs, ireg, val)
volatile tga_reg_t *tgaregs;
u_int8_t ireg;
u_int8_t val;
{
tga_bt485_wr_d(tgaregs, BT485_REG_PCRAM_WRADDR, ireg);
tga_bt485_wr_d(tgaregs, BT485_REG_EXTENDED, val);
}
inline u_int8_t
tga_bt485_rd_i(tgaregs, ireg)
volatile tga_reg_t *tgaregs;
u_int8_t ireg;
{
tga_bt485_wr_d(tgaregs, BT485_REG_PCRAM_WRADDR, ireg);
return (tga_bt485_rd_d(tgaregs, BT485_REG_EXTENDED));
}
void
tga_bt485_update(dc, data)
struct tga_devconfig *dc;
struct bt485data *data;
{
u_int8_t regval;
int count, i, v;
v = data->changed;
data->changed = 0;
if (v & DATA_ENB_CHANGED) {
regval = tga_bt485_rd_d(dc->dc_regs, BT485_REG_COMMAND_2);
if (data->curenb)
regval |= 0x01;
else
regval &= ~0x03;
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COMMAND_2, regval);
}
if (v & DATA_CURCMAP_CHANGED) {
/* addr[9:0] assumed to be 0 */
/* set addr[7:0] to 1 */
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COC_WRADDR, 0x01);
/* spit out the cursor data */
for (i = 0; i < 2; i++) {
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COCDATA,
data->curcmap_r[i]);
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COCDATA,
data->curcmap_g[i]);
tga_bt485_wr_d(dc->dc_regs, BT485_REG_COCDATA,
data->curcmap_b[i]);
}
}
if (v & DATA_CURSHAPE_CHANGED) {
count = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
/*
* Write the cursor image data:
* set addr[9:8] to 0,
* set addr[7:0] to 0,
* spit it all out.
*/
regval = tga_bt485_rd_i(dc->dc_regs,
BT485_IREG_COMMAND_3);
regval &= ~0x03;
tga_bt485_wr_i(dc->dc_regs, BT485_IREG_COMMAND_3,
regval);
tga_bt485_wr_d(dc->dc_regs, BT485_REG_PCRAM_WRADDR, 0);
for (i = 0; i < count; i++)
tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_RAM,
data->curimage[i]);
/*
* Write the cursor mask data:
* set addr[9:8] to 2,
* set addr[7:0] to 0,
* spit it all out.
*/
regval = tga_bt485_rd_i(dc->dc_regs,
BT485_IREG_COMMAND_3);
regval &= ~0x03; regval |= 0x02;
tga_bt485_wr_i(dc->dc_regs, BT485_IREG_COMMAND_3,
regval);
tga_bt485_wr_d(dc->dc_regs, BT485_REG_PCRAM_WRADDR, 0);
for (i = 0; i < count; i++)
tga_bt485_wr_d(dc->dc_regs, BT485_REG_CURSOR_RAM,
data->curmask[i]);
/* set addr[9:0] back to 0 */
regval = tga_bt485_rd_i(dc->dc_regs, BT485_IREG_COMMAND_3);
regval &= ~0x03;
tga_bt485_wr_i(dc->dc_regs, BT485_IREG_COMMAND_3, regval);
}
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);
/* 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);
}
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