NetBSD-5.0.2/sys/dev/ic/bt485.c
/* $NetBSD: bt485.c,v 1.13 2005/12/11 12:21:26 christos 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.
*/
/* This code was derived from and originally located in sys/dev/pci/
* NetBSD: tga_bt485.c,v 1.4 1999/03/24 05:51:21 mrg Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bt485.c,v 1.13 2005/12/11 12:21:26 christos Exp $");
#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 <uvm/uvm_extern.h>
#include <dev/pci/pcivar.h>
#include <dev/ic/bt485reg.h>
#include <dev/ic/bt485var.h>
#include <dev/ic/ramdac.h>
#include <dev/wscons/wsconsio.h>
/*
* Functions exported via the RAMDAC configuration table.
*/
void bt485_init(struct ramdac_cookie *);
int bt485_set_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *);
int bt485_get_cmap(struct ramdac_cookie *, struct wsdisplay_cmap *);
int bt485_set_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *);
int bt485_get_cursor(struct ramdac_cookie *, struct wsdisplay_cursor *);
int bt485_set_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *);
int bt485_get_curpos(struct ramdac_cookie *, struct wsdisplay_curpos *);
int bt485_get_curmax(struct ramdac_cookie *, struct wsdisplay_curpos *);
/* XXX const */
struct ramdac_funcs bt485_funcsstruct = {
"Bt485",
bt485_register,
bt485_init,
bt485_set_cmap,
bt485_get_cmap,
bt485_set_cursor,
bt485_get_cursor,
bt485_set_curpos,
bt485_get_curpos,
bt485_get_curmax,
NULL, /* check_curcmap; not needed */
NULL, /* set_curcmap; not needed */
NULL, /* get_curcmap; not needed */
NULL, /* no dot clock to set */
};
/*
* Private data.
*/
struct bt485data {
void *cookie; /* This is what is passed
* around, and is probably
* struct tga_devconfig *
*/
int (*ramdac_sched_update)(void *, void (*)(void *));
void (*ramdac_wr)(void *, u_int, u_int8_t);
u_int8_t (*ramdac_rd)(void *, u_int);
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 bt485_wr_i (struct bt485data *, u_int8_t, u_int8_t);
inline u_int8_t bt485_rd_i(struct bt485data *, u_int8_t);
void bt485_update(void *);
void bt485_update_curpos(struct bt485data *);
/*****************************************************************************/
/*
* Functions exported via the RAMDAC configuration table.
*/
struct ramdac_funcs *
bt485_funcs(void)
{
return &bt485_funcsstruct;
}
struct ramdac_cookie *
bt485_register(v, sched_update, wr, rd)
void *v;
int (*sched_update)(void *, void (*)(void *));
void (*wr)(void *, u_int, u_int8_t);
u_int8_t (*rd)(void *, u_int);
{
struct bt485data *data;
/*
* XXX -- comment out of date. rcd.
* 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.
*/
data = malloc(sizeof *data, M_DEVBUF, M_WAITOK);
/* XXX -- if !data */
data->cookie = v;
data->ramdac_sched_update = sched_update;
data->ramdac_wr = wr;
data->ramdac_rd = rd;
return (struct ramdac_cookie *)data;
}
/*
* This function exists solely to provide a means to init
* the RAMDAC without first registering. It is useful for
* initializing the console early on.
*/
void
bt485_cninit(v, sched_update, wr, rd)
void *v;
int (*sched_update)(void *, void (*)(void *));
void (*wr)(void *, u_int, u_int8_t);
u_int8_t (*rd)(void *, u_int);
{
struct bt485data tmp, *data = &tmp;
data->cookie = v;
data->ramdac_sched_update = sched_update;
data->ramdac_wr = wr;
data->ramdac_rd = rd;
bt485_init((struct ramdac_cookie *)data);
}
void
bt485_init(rc)
struct ramdac_cookie *rc;
{
u_int8_t regval;
struct bt485data *data = (struct bt485data *)rc;
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 = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_0);
regval |= 0x80;
/*
* Set the RAMDAC to 8 bit resolution, rather than 6 bit
* resolution.
*/
regval |= 0x02;
data->ramdac_wr(data->cookie, BT485_REG_COMMAND_0, regval);
/* Set the RAMDAC to 8BPP (no interestion options). */
data->ramdac_wr(data->cookie, BT485_REG_COMMAND_1, 0x40);
/* Disable the cursor (for now) */
regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2);
regval &= ~0x03;
regval |= 0x24;
data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval);
/* Use a 64x64x2 cursor */
regval = bt485_rd_i(data, BT485_IREG_COMMAND_3);
regval |= 0x04;
regval |= 0x08;
bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
/* Set the Pixel Mask to something useful */
data->ramdac_wr(data->cookie, BT485_REG_PIXMASK, 0xff);
/*
* Initialize 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;
bt485_update((void *)data);
}
int
bt485_set_cmap(rc, cmapp)
struct ramdac_cookie *rc;
struct wsdisplay_cmap *cmapp;
{
struct bt485data *data = (struct bt485data *)rc;
u_int count, index;
uint8_t r[256], g[256], b[256];
int s, error;
if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index)
return (EINVAL);
index = cmapp->index;
count = cmapp->count;
error = copyin(cmapp->red, &r[index], count);
if (error)
return error;
error = copyin(cmapp->green, &g[index], count);
if (error)
return error;
error = copyin(cmapp->blue, &b[index], count);
if (error)
return error;
s = spltty();
memcpy(&data->cmap_r[index], &r[index], count);
memcpy(&data->cmap_g[index], &g[index], count);
memcpy(&data->cmap_b[index], &b[index], count);
data->changed |= DATA_CMAP_CHANGED;
data->ramdac_sched_update(data->cookie, bt485_update);
splx(s);
return (0);
}
int
bt485_get_cmap(rc, cmapp)
struct ramdac_cookie *rc;
struct wsdisplay_cmap *cmapp;
{
struct bt485data *data = (struct bt485data *)rc;
u_int count, index;
int error;
if (cmapp->index >= 256 || cmapp->count > 256 - cmapp->index )
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
bt485_set_cursor(rc, cursorp)
struct ramdac_cookie *rc;
struct wsdisplay_cursor *cursorp;
{
struct bt485data *data = (struct bt485data *)rc;
u_int count = 0, icount = 0, index = 0, v;
char r[2], g[2], b[2], image[512], mask[512];
int s, error;
v = cursorp->which;
/*
* For DOCMAP and DOSHAPE, copy in the new data
* before we do anything that we can't recover from.
*/
if (v & WSDISPLAY_CURSOR_DOCMAP) {
if (cursorp->cmap.index > 2 ||
(cursorp->cmap.index + cursorp->cmap.count) > 2)
return (EINVAL);
count = cursorp->cmap.count;
index = cursorp->cmap.index;
error = copyin(cursorp->cmap.red, &r[index], count);
if (error)
return error;
error = copyin(cursorp->cmap.green, &g[index], count);
if (error)
return error;
error = copyin(cursorp->cmap.blue, &b[index], count);
if (error)
return error;
}
if (v & WSDISPLAY_CURSOR_DOSHAPE) {
if (cursorp->size.x > CURSOR_MAX_SIZE ||
cursorp->size.y > CURSOR_MAX_SIZE)
return (EINVAL);
icount = (CURSOR_MAX_SIZE / NBBY) * data->cursize.y;
error = copyin(cursorp->image, image, icount);
if (error)
return error;
error = copyin(cursorp->mask, mask, icount);
if (error)
return error;
}
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;
bt485_update_curpos(data);
}
s = spltty();
/* Data is all available; perform the requested operations. */
if (v & WSDISPLAY_CURSOR_DOCUR) {
data->curenb = cursorp->enable;
data->changed |= DATA_ENB_CHANGED;
}
if (v & WSDISPLAY_CURSOR_DOCMAP) {
memcpy(&data->curcmap_r[index], &r[index], count);
memcpy(&data->curcmap_g[index], &g[index], count);
memcpy(&data->curcmap_b[index], &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;
memset(data->curimage, 0, sizeof data->curimage);
memset(data->curmask, 0, sizeof data->curmask);
memcpy(data->curimage, image, icount);
memcpy(data->curmask, mask, icount);
data->changed |= DATA_CURSHAPE_CHANGED;
}
if (data->changed)
data->ramdac_sched_update(data->cookie, bt485_update);
splx(s);
return (0);
}
int
bt485_get_cursor(rc, cursorp)
struct ramdac_cookie *rc;
struct wsdisplay_cursor *cursorp;
{
struct bt485data *data = (struct bt485data *)rc;
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
bt485_set_curpos(rc, curposp)
struct ramdac_cookie *rc;
struct wsdisplay_curpos *curposp;
{
struct bt485data *data = (struct bt485data *)rc;
data->curpos = *curposp;
bt485_update_curpos(data);
return (0);
}
int
bt485_get_curpos(rc, curposp)
struct ramdac_cookie *rc;
struct wsdisplay_curpos *curposp;
{
struct bt485data *data = (struct bt485data *)rc;
*curposp = data->curpos;
return (0);
}
int
bt485_get_curmax(rc, curposp)
struct ramdac_cookie *rc;
struct wsdisplay_curpos *curposp;
{
curposp->x = curposp->y = CURSOR_MAX_SIZE;
return (0);
}
/*****************************************************************************/
/*
* Internal functions.
*/
inline void
bt485_wr_i(data, ireg, val)
struct bt485data *data;
u_int8_t ireg;
u_int8_t val;
{
data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg);
data->ramdac_wr(data->cookie, BT485_REG_EXTENDED, val);
}
inline u_int8_t
bt485_rd_i(data, ireg)
struct bt485data *data;
u_int8_t ireg;
{
data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, ireg);
return (data->ramdac_rd(data->cookie, BT485_REG_EXTENDED));
}
void
bt485_update(vp)
void *vp;
{
struct bt485data *data = vp;
u_int8_t regval;
int count, i, v;
v = data->changed;
data->changed = 0;
if (v & DATA_ENB_CHANGED) {
regval = data->ramdac_rd(data->cookie, BT485_REG_COMMAND_2);
if (data->curenb)
regval |= 0x01;
else
regval &= ~0x03;
data->ramdac_wr(data->cookie, BT485_REG_COMMAND_2, regval);
}
if (v & DATA_CURCMAP_CHANGED) {
/* addr[9:0] assumed to be 0 */
/* set addr[7:0] to 1 */
data->ramdac_wr(data->cookie, BT485_REG_COC_WRADDR, 0x01);
/* spit out the cursor data */
for (i = 0; i < 2; i++) {
data->ramdac_wr(data->cookie, BT485_REG_COCDATA,
data->curcmap_r[i]);
data->ramdac_wr(data->cookie, BT485_REG_COCDATA,
data->curcmap_g[i]);
data->ramdac_wr(data->cookie, 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 = bt485_rd_i(data, BT485_IREG_COMMAND_3);
regval &= ~0x03;
bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0);
for (i = 0; i < count; i++)
data->ramdac_wr(data->cookie, 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 = bt485_rd_i(data, BT485_IREG_COMMAND_3);
regval &= ~0x03; regval |= 0x02;
bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0);
for (i = 0; i < count; i++)
data->ramdac_wr(data->cookie, BT485_REG_CURSOR_RAM,
data->curmask[i]);
/* set addr[9:0] back to 0 */
regval = bt485_rd_i(data, BT485_IREG_COMMAND_3);
regval &= ~0x03;
bt485_wr_i(data, BT485_IREG_COMMAND_3, regval);
}
if (v & DATA_CMAP_CHANGED) {
/* addr[9:0] assumed to be 0 */
/* set addr[7:0] to 0 */
data->ramdac_wr(data->cookie, BT485_REG_PCRAM_WRADDR, 0x00);
/* spit out the cursor data */
for (i = 0; i < 256; i++) {
data->ramdac_wr(data->cookie, BT485_REG_PALETTE,
data->cmap_r[i]);
data->ramdac_wr(data->cookie, BT485_REG_PALETTE,
data->cmap_g[i]);
data->ramdac_wr(data->cookie, BT485_REG_PALETTE,
data->cmap_b[i]);
}
}
}
void
bt485_update_curpos(data)
struct bt485data *data;
{
void *cookie = data->cookie;
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;
data->ramdac_wr(cookie, BT485_REG_CURSOR_X_LOW, x & 0xff);
data->ramdac_wr(cookie, BT485_REG_CURSOR_X_HIGH, (x >> 8) & 0x0f);
data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_LOW, y & 0xff);
data->ramdac_wr(cookie, BT485_REG_CURSOR_Y_HIGH, (y >> 8) & 0x0f);
splx(s);
}