/* $OpenBSD: bt485.c,v 1.15 2024/09/01 03:08:56 jsg Exp $ */ /* $NetBSD: bt485.c,v 1.2 2000/04/02 18:55:01 nathanw 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 #include #include #include #include #include #include #include #include #include #include #include #include /* * 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 interesting 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 = 0; i < 256; i++) { data->cmap_r[i] = rasops_cmap[3*i + 0]; data->cmap_g[i] = rasops_cmap[3*i + 1]; data->cmap_b[i] = rasops_cmap[3*i + 2]; } 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; int s, error; #ifdef DIAGNOSTIC if (rc == NULL) panic("bt485_set_cmap: rc"); if (cmapp == NULL) panic("bt485_set_cmap: cmapp"); #endif index = cmapp->index; count = cmapp->count; if (index >= 256 || count > 256 - index) return (EINVAL); s = spltty(); if ((error = copyin(cmapp->red, &data->cmap_r[index], count)) != 0) { splx(s); return (error); } if ((error = copyin(cmapp->green, &data->cmap_g[index], count)) != 0) { splx(s); return (error); } if ((error = copyin(cmapp->blue, &data->cmap_b[index], count)) != 0) { splx(s); return (error); } data->changed |= DATA_CMAP_CHANGED; data->ramdac_sched_update(data->cookie, bt485_update); #ifdef __alpha__ alpha_mb(); #endif 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, index; int error; int 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) { index = cursorp->cmap.index; count = cursorp->cmap.count; if (index >= 2 || count > 2 - index) return (EINVAL); } if (v & WSDISPLAY_CURSOR_DOSHAPE) { if ((u_int)cursorp->size.x > CURSOR_MAX_SIZE || (u_int)cursorp->size.y > CURSOR_MAX_SIZE) return (EINVAL); } 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(); /* 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) { index = cursorp->cmap.index; count = cursorp->cmap.count; if ((error = copyin(cursorp->cmap.red, &data->curcmap_r[index], count)) != 0) { splx(s); return (error); } if ((error = copyin(cursorp->cmap.green, &data->curcmap_g[index], count)) != 0) { splx(s); return (error); } if ((error = copyin(cursorp->cmap.blue, &data->curcmap_b[index], count)) != 0) { splx(s); return (error); } 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); if ((error = copyin(cursorp->image, data->curimage, count)) != 0) { splx(s); return (error); } if ((error = copyin(cursorp->mask, data->curmask, count)) != 0) { splx(s); return (error); } 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); }