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/* $Id: tcxfb.c,v 1.1 1998/07/21 14:50:44 jj Exp $
* tcxfb.c: TCX 24/8bit frame buffer driver
*
* Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/malloc.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/selection.h>
#include "sbusfb.h"
#include <asm/io.h>
#include "fbcon-cfb8.h"
/* THC definitions */
#define TCX_THC_MISC_REV_SHIFT 16
#define TCX_THC_MISC_REV_MASK 15
#define TCX_THC_MISC_VSYNC_DIS (1 << 25)
#define TCX_THC_MISC_HSYNC_DIS (1 << 24)
#define TCX_THC_MISC_RESET (1 << 12)
#define TCX_THC_MISC_VIDEO (1 << 10)
#define TCX_THC_MISC_SYNC (1 << 9)
#define TCX_THC_MISC_VSYNC (1 << 8)
#define TCX_THC_MISC_SYNC_ENAB (1 << 7)
#define TCX_THC_MISC_CURS_RES (1 << 6)
#define TCX_THC_MISC_INT_ENAB (1 << 5)
#define TCX_THC_MISC_INT (1 << 4)
#define TCX_THC_MISC_INIT 0x9f
#define TCX_THC_REV_REV_SHIFT 20
#define TCX_THC_REV_REV_MASK 15
#define TCX_THC_REV_MINREV_SHIFT 28
#define TCX_THC_REV_MINREV_MASK 15
/* The contents are unknown */
struct tcx_tec {
volatile u32 tec_matrix;
volatile u32 tec_clip;
volatile u32 tec_vdc;
};
struct tcx_thc {
volatile u32 thc_rev;
u32 thc_pad0[511];
volatile u32 thc_hs; /* hsync timing */
volatile u32 thc_hsdvs;
volatile u32 thc_hd;
volatile u32 thc_vs; /* vsync timing */
volatile u32 thc_vd;
volatile u32 thc_refresh;
volatile u32 thc_misc;
u32 thc_pad1[56];
volatile u32 thc_cursxy; /* cursor x,y position (16 bits each) */
volatile u32 thc_cursmask[32]; /* cursor mask bits */
volatile u32 thc_cursbits[32]; /* what to show where mask enabled */
};
static struct sbus_mmap_map tcx_mmap_map[] = {
{ TCX_RAM8BIT, 0, SBUS_MMAP_FBSIZE(1) },
{ TCX_RAM24BIT, 0, SBUS_MMAP_FBSIZE(4) },
{ TCX_UNK3, 0, SBUS_MMAP_FBSIZE(8) },
{ TCX_UNK4, 0, SBUS_MMAP_FBSIZE(8) },
{ TCX_CONTROLPLANE, 0, SBUS_MMAP_FBSIZE(4) },
{ TCX_UNK6, 0, SBUS_MMAP_FBSIZE(8) },
{ TCX_UNK7, 0, SBUS_MMAP_FBSIZE(8) },
{ TCX_TEC, 0, PAGE_SIZE },
{ TCX_BTREGS, 0, PAGE_SIZE },
{ TCX_THC, 0, PAGE_SIZE },
{ TCX_DHC, 0, PAGE_SIZE },
{ TCX_ALT, 0, PAGE_SIZE },
{ TCX_UNK2, 0, 0x20000 },
{ 0, 0, 0 }
};
static void tcx_set_control_plane (struct fb_info_sbusfb *fb)
{
u32 *p, *pend;
p = fb->s.tcx.cplane;
if (!p) return;
for (pend = p + fb->type.fb_size; p < pend; p++)
*p &= 0xffffff;
}
static void tcx_switch_from_graph (struct fb_info_sbusfb *fb)
{
/* Reset control plane to 8bit mode if necessary */
if (fb->open && fb->mmaped)
tcx_set_control_plane (fb);
}
static void tcx_loadcmap (struct fb_info_sbusfb *fb, int index, int count)
{
struct bt_regs *bt = fb->s.tcx.bt;
int i;
bt->addr = index << 24;
for (i = index; count--; i++){
bt->color_map = fb->color_map CM(i,0) << 24;
bt->color_map = fb->color_map CM(i,1) << 24;
bt->color_map = fb->color_map CM(i,2) << 24;
}
}
static void tcx_restore_palette (struct fb_info_sbusfb *fb)
{
struct bt_regs *bt = fb->s.tcx.bt;
bt->addr = 0;
bt->color_map = 0xffffffff;
bt->color_map = 0xffffffff;
bt->color_map = 0xffffffff;
}
static void tcx_setcursormap (struct fb_info_sbusfb *fb, u8 *red, u8 *green, u8 *blue)
{
struct bt_regs *bt = fb->s.tcx.bt;
/* Note the 2 << 24 is different from cg6's 1 << 24 */
bt->addr = 2 << 24;
bt->cursor = red[0] << 24;
bt->cursor = green[0] << 24;
bt->cursor = blue[0] << 24;
bt->addr = 3 << 24;
bt->cursor = red[1] << 24;
bt->cursor = green[1] << 24;
bt->cursor = blue[1] << 24;
bt->addr = 0;
}
/* Set cursor shape */
static void tcx_setcurshape (struct fb_info_sbusfb *fb)
{
struct tcx_thc *thc = fb->s.tcx.thc;
int i;
for (i = 0; i < 32; i++){
thc->thc_cursmask [i] = fb->cursor.bits[0][i];
thc->thc_cursbits [i] = fb->cursor.bits[1][i];
}
}
/* Load cursor information */
static void tcx_setcursor (struct fb_info_sbusfb *fb)
{
unsigned int v;
struct cg_cursor *c = &fb->cursor;
if (c->enable)
v = ((c->cpos.fbx - c->chot.fbx) << 16)
|((c->cpos.fby - c->chot.fby) & 0xffff);
else
/* Magic constant to turn off the cursor */
v = ((65536-32) << 16) | (65536-32);
fb->s.tcx.thc->thc_cursxy = v;
}
static void tcx_blank (struct fb_info_sbusfb *fb)
{
fb->s.tcx.thc->thc_misc &= ~TCX_THC_MISC_VIDEO;
/* This should put us in power-save */
fb->s.tcx.thc->thc_misc |= TCX_THC_MISC_VSYNC_DIS;
fb->s.tcx.thc->thc_misc |= TCX_THC_MISC_HSYNC_DIS;
}
static void tcx_unblank (struct fb_info_sbusfb *fb)
{
fb->s.tcx.thc->thc_misc &= ~TCX_THC_MISC_VSYNC_DIS;
fb->s.tcx.thc->thc_misc &= ~TCX_THC_MISC_HSYNC_DIS;
fb->s.tcx.thc->thc_misc |= TCX_THC_MISC_VIDEO;
}
static void tcx_reset (struct fb_info_sbusfb *fb)
{
if (fb->open && fb->mmaped)
tcx_set_control_plane(fb);
/* Turn off stuff in the Transform Engine. */
fb->s.tcx.tec->tec_matrix = 0;
fb->s.tcx.tec->tec_clip = 0;
fb->s.tcx.tec->tec_vdc = 0;
/* Enable cursor in Brooktree DAC. */
fb->s.tcx.bt->addr = 0x06 << 24;
fb->s.tcx.bt->control |= 0x03 << 24;
}
static void tcx_margins (struct fb_info_sbusfb *fb, struct display *p, int x_margin, int y_margin)
{
p->screen_base += (y_margin - fb->y_margin) * p->line_length + (x_margin - fb->x_margin);
}
static char idstring[60] __initdata = { 0 };
__initfunc(char *tcxfb_init(struct fb_info_sbusfb *fb))
{
struct fb_fix_screeninfo *fix = &fb->fix;
struct display *disp = &fb->disp;
struct fbtype *type = &fb->type;
unsigned long phys = fb->sbdp->reg_addrs[0].phys_addr;
int lowdepth;
#ifndef FBCON_HAS_CFB8
return NULL;
#endif
lowdepth = prom_getbool (fb->prom_node, "tcx-8-bit");
if (lowdepth) {
strcpy(fb->info.modename, "TCX8");
strcpy(fix->id, "TCX8");
} else {
strcpy(fb->info.modename, "TCX24");
strcpy(fix->id, "TCX24");
}
fix->line_length = fb->var.xres_virtual;
disp->scrollmode = SCROLL_YREDRAW;
if (!disp->screen_base)
disp->screen_base = (char *)sparc_alloc_io(phys, 0,
type->fb_size, "tcx_ram", fb->iospace, 0);
disp->screen_base += fix->line_length * fb->y_margin + fb->x_margin;
fb->s.tcx.tec = (struct tcx_tec *)sparc_alloc_io(fb->sbdp->reg_addrs[7].phys_addr, 0,
sizeof(struct tcx_tec), "tcx_tec", fb->iospace, 0);
fb->s.tcx.thc = (struct tcx_thc *)sparc_alloc_io(fb->sbdp->reg_addrs[9].phys_addr, 0,
sizeof(struct tcx_thc), "tcx_thc", fb->iospace, 0);
fb->s.tcx.bt = (struct bt_regs *)sparc_alloc_io(fb->sbdp->reg_addrs[8].phys_addr, 0,
sizeof(struct bt_regs), "tcx_dac", fb->iospace, 0);
if (!lowdepth) {
fb->s.tcx.cplane = (u32 *)sparc_alloc_io(fb->sbdp->reg_addrs[4].phys_addr, 0,
type->fb_size*4, "tcx_cplane", fb->iospace, 0);
type->fb_depth = 24;
fb->switch_from_graph = tcx_switch_from_graph;
} else {
/* As there can be one tcx in a machine only, we can write directly into
tcx_mmap_map */
tcx_mmap_map[1].size = SBUS_MMAP_EMPTY;
tcx_mmap_map[4].size = SBUS_MMAP_EMPTY;
tcx_mmap_map[5].size = SBUS_MMAP_EMPTY;
tcx_mmap_map[6].size = SBUS_MMAP_EMPTY;
}
fb->dispsw = fbcon_cfb8;
fb->margins = tcx_margins;
fb->loadcmap = tcx_loadcmap;
if (prom_getbool (fb->prom_node, "hw-cursor")) {
fb->setcursor = tcx_setcursor;
fb->setcursormap = tcx_setcursormap;
fb->setcurshape = tcx_setcurshape;
}
fb->restore_palette = tcx_restore_palette;
fb->blank = tcx_blank;
fb->unblank = tcx_unblank;
fb->reset = tcx_reset;
fb->physbase = 0;
fb->mmap_map = tcx_mmap_map;
/* Initialize Brooktree DAC */
fb->s.tcx.bt->addr = 0x04 << 24; /* color planes */
fb->s.tcx.bt->control = 0xff << 24;
fb->s.tcx.bt->addr = 0x05 << 24;
fb->s.tcx.bt->control = 0x00 << 24;
fb->s.tcx.bt->addr = 0x06 << 24; /* overlay plane */
fb->s.tcx.bt->control = 0x73 << 24;
fb->s.tcx.bt->addr = 0x07 << 24;
fb->s.tcx.bt->control = 0x00 << 24;
sprintf(idstring, "tcx at %x.%08lx Rev %d.%d %s", fb->iospace, phys,
(fb->s.tcx.thc->thc_rev >> TCX_THC_REV_REV_SHIFT) & TCX_THC_REV_REV_MASK,
(fb->s.tcx.thc->thc_rev >> TCX_THC_REV_MINREV_SHIFT) & TCX_THC_REV_MINREV_MASK,
lowdepth ? "8-bit only" : "24-bit depth");
tcx_reset(fb);
return idstring;
}
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