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linux/drivers/video/cyblafb.c
Knut Petersen 9fa68eae9f [PATCH] framebuffer: new driver for cyberblade/i1 graphics core 
This is a framebuffer driver for the Cyberblade/i1 graphics core.

Currently tridenfb claims to support the cyberblade/i1 graphics core.  This
is of very limited truth.  Even vesafb is faster and provides more working
modes and a much better quality of the video signal.  There is a great
number of bugs in tridentfb ...  but most often it is impossible to decide
if these bugs are real bugs or if fixing them for the cyberblade/i1 core
would break support for one of the other supported chips.

Tridentfb seems to be unmaintained,and documentation for most of the
supported chips is not available.  So "fixing" cyberblade/i1 support inside
of tridentfb was not an option, it would have caused numerous
if(CYBERBLADEi1) else ...  cases and would have rendered the code to be
almost unmaintainable.

A first version of this driver was published on 2005-07-31.  A fix for a
bug reported by Jochen Hein was integrated as well as some changes
requested by Antonino A.  Daplas.

A message has been added to tridentfb to inform current users of tridentfb
to switch to cyblafb if the cyberblade/i1 graphics core is detected.

This patch is one logical change, but because of the included documentation
it is bigger than 70kb.  Therefore it is not sent to lkml and
linux-fbdev-devel,

Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de>
Cc: Muli Ben-Yehuda <mulix@mulix.org>
Acked-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-09 13:58:02 -07:00

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/*
* Frame buffer driver for Trident Cyberblade/i1 graphics core
*
* Copyright 2005 Knut Petersen <Knut_Petersen@t-online.de>
*
* CREDITS:
* tridentfb.c by Jani Monoses
* see files above for further credits
*
* TODO:
*
*/
#define CYBLAFB_DEBUG 0
#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/types.h>
#include <video/cyblafb.h>
#define VERSION "0.54"
struct cyblafb_par {
u32 pseudo_pal[16];
struct fb_ops ops;
};
static struct fb_fix_screeninfo cyblafb_fix __devinitdata = {
.id = "CyBla",
.type = FB_TYPE_PACKED_PIXELS,
.ypanstep = 1,
.visual = FB_VISUAL_PSEUDOCOLOR,
.accel = FB_ACCEL_NONE,
};
static char *mode __devinitdata = NULL;
static int bpp __devinitdata = 8;
static int ref __devinitdata = 75;
static int fp __devinitdata;
static int crt __devinitdata;
static int memsize __devinitdata;
static int vesafb __devinitdata;
static int nativex;
static int center;
static int stretch;
static int pciwb = 1;
static int pcirb = 1;
static int pciwr = 1;
static int pcirr = 1;
static int verbosity;
static int displaytype;
static void __iomem * io_virt; // iospace virtual memory address
module_param(mode,charp,0);
module_param(bpp,int,0);
module_param(ref,int,0);
module_param(fp,int,0);
module_param(crt,int,0);
module_param(nativex,int,0);
module_param(center,int,0);
module_param(stretch,int,0);
module_param(pciwb,int,0);
module_param(pcirb,int,0);
module_param(pciwr,int,0);
module_param(pcirr,int,0);
module_param(memsize,int,0);
module_param(verbosity,int,0);
module_param(vesafb,int,0);
//=========================================
//
// Port access macros for memory mapped io
//
//=========================================
#define out8(r,v) writeb(v,io_virt+r)
#define out32(r,v) writel(v,io_virt+r)
#define in8(r) readb(io_virt+r)
#define in32(r) readl(io_virt+r)
//======================================
//
// Hardware access inline functions
//
//======================================
static inline unsigned char read3X4(int reg)
{
out8(0x3D4,reg);
return in8(0x3D5);
}
static inline unsigned char read3C4(int reg)
{
out8(0x3C4,reg);
return in8(0x3C5);
}
static inline unsigned char read3CE(int reg)
{
out8(0x3CE,reg);
return in8(0x3CF);
}
static inline void write3X4(int reg,unsigned char val)
{
out8(0x3D4,reg);
out8(0x3D5,val);
}
static inline void write3C4(int reg,unsigned char val)
{
out8(0x3C4,reg);
out8(0x3C5,val);
}
static inline void write3CE(int reg,unsigned char val)
{
out8(0x3CE,reg);
out8(0x3CF,val);
}
static inline void write3C0(int reg,unsigned char val)
{
in8(0x3DA); // read to reset index
out8(0x3C0,reg);
out8(0x3C0,val);
}
//=================================================
//
// Enable memory mapped io and unprotect registers
//
//=================================================
static inline void enable_mmio(void)
{
int tmp;
outb(0x0B,0x3C4);
inb(0x3C5); // Set NEW mode
outb(SR0E,0x3C4); // write enable a lot of extended ports
outb(0x80,0x3C5);
outb(SR11,0x3C4); // write enable those extended ports that
outb(0x87,0x3C5); // are not affected by SR0E_New
outb(CR1E,0x3d4); // clear write protect bit for port 0x3c2
tmp=inb(0x3d5) & 0xBF;
outb(CR1E,0x3d4);
outb(tmp,0x3d5);
outb(CR39,0x3D4);
outb(inb(0x3D5)|0x01,0x3D5); // Enable mmio, everything else untouched
}
//=================================================
//
// Set pixel clock VCLK1
// - multipliers set elswhere
// - freq in units of 0.01 MHz
//
//=================================================
static void set_vclk(struct cyblafb_par *par, int freq)
{
u32 m,n,k;
int f,fi,d,di;
u8 lo=0,hi=0;
d = 2000;
k = freq >= 10000 ? 0 : freq >= 5000 ? 1 : freq >= 2500 ? 2 : 3;
for(m = 0;m<64;m++)
for(n = 0;n<250;n++) { // max 249 is a hardware limit for cybla/i1 !
fi = (int)(((5864727*(n+8))/((m+2)*(1<<k)))>>12);
if ((di = abs(fi - freq)) < d) {
d = di;
f = fi;
lo = (u8) n;
hi = (u8) ((k<<6) | m);
}
}
write3C4(SR19,hi);
write3C4(SR18,lo);
if(verbosity > 1)
output("pixclock = %d.%02d MHz, k/m/n %x %x %x\n",
freq/100,freq%100,(hi&0xc0)>>6,hi&0x3f,lo);
}
//================================================
//
// Cyberblade specific Graphics Engine (GE) setup
//
//================================================
static void cyblafb_setup_GE(int pitch,int bpp)
{
int base = (pitch>>3)<<20;
switch (bpp) {
case 8: base |= (0<<29); break;
case 15: base |= (5<<29); break;
case 16: base |= (1<<29); break;
case 24:
case 32: base |= (2<<29); break;
}
write3X4(CR36,0x90); // reset GE
write3X4(CR36,0x80); // enable GE
out32(GE24,1<<7); // reset all GE pointers
out32(GE24,0);
write3X4(CR2D,0x00); // GE Timinigs, no delays
out32(GEB8,base); // Destination Stride / Buffer Base 0, p 133
out32(GEBC,base); // Destination Stride / Buffer Base 1, p 133
out32(GEC0,base); // Destination Stride / Buffer Base 2, p 133
out32(GEC4,base); // Destination Stride / Buffer Base 3, p 133
out32(GEC8,base); // Source Stride / Buffer Base 0, p 133
out32(GECC,base); // Source Stride / Buffer Base 1, p 133
out32(GED0,base); // Source Stride / Buffer Base 2, p 133
out32(GED4,base); // Source Stride / Buffer Base 3, p 133
out32(GE6C,0); // Pattern and Style, p 129, ok
}
//=====================================================================
//
// Although this is a .fb_sync function that could be enabled in
// cyblafb_ops, we do not include it there. We sync immediately before
// new GE operations to improve performance.
//
//=====================================================================
static int cyblafb_sync(struct fb_info *info)
{
int status, i=100000;
while( ((status=in32(GE20)) & 0xFA800000) && i != 0)
i--;
if (i == 0) {
// The timeout might be caused by disabled mmio.
// Cause:
// - bit CR39 & 1 == 0 upon return, X trident driver bug
// - kdm bug (KD_GRAPHICS not set on first switch)
// - kernel design flaw (it believes in the correctness
// of kdm/X
// So we make sure that mmio is enabled first ...
enable_mmio();
// show_trace(NULL,&status);
i=1000000;
while( ((status=in32(GE20)) & 0xFA800000) && i != 0)
i--;
if (i == 0) {
output("GE Timeout, status: %x\n",status);
if(status & 0x80000000)
output("Bresenham Engine : Busy\n");
if(status & 0x40000000)
output("Setup Engine : Busy\n");
if(status & 0x20000000)
output("SP / DPE : Busy\n");
if(status & 0x10000000)
output("Memory Interface : Busy\n");
if(status & 0x08000000)
output("Com Lst Proc : Busy\n");
if(status & 0x04000000)
output("Block Write : Busy\n");
if(status & 0x02000000)
output("Command Buffer : Full\n");
if(status & 0x01000000)
output("RESERVED : Busy\n");
if(status & 0x00800000)
output("PCI Write Buffer : Busy\n");
cyblafb_setup_GE(info->var.xres,
info->var.bits_per_pixel);
}
}
return 0;
}
//==============================
//
// Cyberblade specific fillrect
//
//==============================
static void cyblafb_fillrect(struct fb_info * info,
const struct fb_fillrect *fr)
{
int bpp = info->var.bits_per_pixel;
int col;
switch (bpp) {
default:
case 8: col = fr->color;
col |= col <<8;
col |= col <<16;
break;
case 16: col = ((u32 *)(info->pseudo_palette))[fr->color];
col |= col <<16;
break;
case 32: col = ((u32 *)(info->pseudo_palette))[fr->color];
break;
}
cyblafb_sync(info);
out32(GE60,col);
out32(GE48,fr->rop ? 0x66:ROP_S);
out32(GE44,0x20000000|1<<19|1<<4|2<<2);
out32(GE08,point(fr->dx,fr->dy));
out32(GE0C,point(fr->dx+fr->width-1,fr->dy+fr->height-1));
}
//==============================
//
// Cyberblade specific copyarea
//
//==============================
static void cyblafb_copyarea(struct fb_info *info,
const struct fb_copyarea *ca)
{
__u32 s1,s2,d1,d2;
int direction;
s1 = point(ca->sx,ca->sy);
s2 = point(ca->sx+ca->width-1,ca->sy+ca->height-1);
d1 = point(ca->dx,ca->dy);
d2 = point(ca->dx+ca->width-1,ca->dy+ca->height-1);
if ((ca->sy > ca->dy) || ((ca->sy == ca->dy) && (ca->sx > ca->dx)))
direction = 0;
else
direction = 2;
cyblafb_sync(info);
out32(GE44,0xa0000000|1<<19|1<<2|direction);
out32(GE00,direction?s2:s1);
out32(GE04,direction?s1:s2);
out32(GE08,direction?d2:d1);
out32(GE0C,direction?d1:d2);
}
//=======================================================================
//
// Cyberblade specific imageblit
//
// Accelerated for the most usual case, blitting 1-bit deep character
// character images. Everything else is passed to the generic imageblit.
//
//=======================================================================
static void cyblafb_imageblit(struct fb_info *info,
const struct fb_image *image)
{
u32 fgcol, bgcol;
int i;
int bpp = info->var.bits_per_pixel;
int index = 0;
int index_end=image->height * image->width / 8;
int width_dds=image->width / 32;
int width_dbs=image->width % 32;
if (image->depth != 1 || bpp < 8 || bpp > 32 || bpp % 8 != 0 ||
image->width % 8 != 0 || image->width == 0 || image->height == 0) {
cfb_imageblit(info,image);
return;
}
if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
fgcol = ((u32*)(info->pseudo_palette))[image->fg_color];
bgcol = ((u32*)(info->pseudo_palette))[image->bg_color];
} else {
fgcol = image->fg_color;
bgcol = image->bg_color;
}
switch (bpp) {
case 8:
fgcol |= fgcol <<8; fgcol |= fgcol <<16;
bgcol |= bgcol <<8; bgcol |= bgcol <<16;
break;
case 16:
fgcol |= fgcol <<16;
bgcol |= bgcol <<16;
break;
default:
break;
}
cyblafb_sync(info);
out32(GE60,fgcol);
out32(GE64,bgcol);
out32(GE44,0xa0000000 | 1<<20 | 1<<19);
out32(GE08,point(image->dx,image->dy));
out32(GE0C,point(image->dx+image->width-1,image->dy+image->height-1));
while(index < index_end) {
for(i=0;i<width_dds;i++) {
out32(GE9C,*((u32*) ((u32)image->data + index)));
index+=4;
}
switch(width_dbs) {
case 0: break;
case 8: out32(GE9C,*((u8*)((u32)image->data+index)));
index+=1;
break;
case 16: out32(GE9C,*((u16*)((u32)image->data+index)));
index+=2;
break;
case 24: out32(GE9C,(u32)(*((u16*)((u32)image->data+index))) |
(u32)(*((u8*)((u32)image->data+index+2)))<<16);
index+=3;
break;
}
}
}
//==========================================================
//
// Check if video mode is acceptable. We change var->??? if
// video mode is slightly off or return error otherwise.
// info->??? must not be changed!
//
//==========================================================
static int cyblafb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
int bpp = var->bits_per_pixel;
int s,t,maxvyres;
//
// we try to support 8, 16, 24 and 32 bpp modes,
// default to 8
//
// there is a 24 bpp mode, but for now we change requests to 32 bpp
// (This is what tridentfb does ... will be changed in the future)
//
//
if ( bpp % 8 != 0 || bpp < 8 || bpp >32)
bpp = 8;
if (bpp == 24 )
bpp = var->bits_per_pixel = 32;
//
// interlaced modes are broken, fail if one is requested
//
if (var->vmode & FB_VMODE_INTERLACED)
return -EINVAL;
//
// fail if requested resolution is higher than physical
// flatpanel resolution
//
if ((displaytype == DISPLAY_FP) && nativex && var->xres > nativex)
return -EINVAL;
//
// xres != xres_virtual is broken, fail if such an
// unusual mode is requested
//
if (var->xres != var->xres_virtual)
return -EINVAL;
//
// we do not allow vclk to exceed 230 MHz
//
if ((bpp==32 ? 200000000 : 100000000) / var->pixclock > 23000)
return -EINVAL;
//
// calc max yres_virtual that would fit in memory
// and max yres_virtual that could be used for scrolling
// and use minimum of the results as maxvyres
//
// adjust vyres_virtual to maxvyres if necessary
// fail if requested yres is bigger than maxvyres
//
s = (0x1fffff / (var->xres * bpp/8)) + var->yres;
t = info->fix.smem_len / (var->xres * bpp/8);
maxvyres = t < s ? t : s;
if (maxvyres < var->yres_virtual)
var->yres_virtual=maxvyres;
if (maxvyres < var->yres)
return -EINVAL;
switch (bpp) {
case 8:
var->red.offset = 0;
var->green.offset = 0;
var->blue.offset = 0;
var->red.length = 6;
var->green.length = 6;
var->blue.length = 6;
break;
case 16:
var->red.offset = 11;
var->green.offset = 5;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 6;
var->blue.length = 5;
break;
case 32:
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
break;
default:
return -EINVAL;
}
return 0;
}
//=====================================================================
//
// Pan the display
//
// The datasheets defines crt start address to be 20 bits wide and
// to be programmed to CR0C, CR0D, CR1E and CR27. Actually there is
// CR2B[5] as an undocumented extension bit. Epia BIOS 2.07 does use
// it, so it is also safe to be used here. BTW: datasheet CR0E on page
// 90 really is CR1E, the real CRE is documented on page 72.
//
//=====================================================================
static int cyblafb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
unsigned int offset;
offset=(var->xoffset+(var->yoffset*var->xres))*var->bits_per_pixel/32;
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
write3X4(CR0D,offset & 0xFF);
write3X4(CR0C,(offset & 0xFF00) >> 8);
write3X4(CR1E,(read3X4(CR1E) & 0xDF) | ((offset & 0x10000) >> 11));
write3X4(CR27,(read3X4(CR27) & 0xF8) | ((offset & 0xE0000) >> 17));
write3X4(CR2B,(read3X4(CR2B) & 0xDF) | ((offset & 0x100000) >> 15));
return 0;
}
//============================================
//
// This will really help in case of a bug ...
// dump most gaphics core registers.
//
//============================================
static void regdump(struct cyblafb_par *par)
{
int i;
if (verbosity < 2)
return;
printk("\n");
for(i=0; i<=0xff; i++) {
outb(i,0x3d4);
printk("CR%02x=%02x ",i,inb(0x3d5));
if (i%16==15)
printk("\n");
}
outb(0x30,0x3ce);
outb(inb(0x3cf) | 0x40,0x3cf);
for(i=0; i<=0x1f; i++) {
if (i==0 || (i>2 && i<8) || i==0x10 || i==0x11 || i==0x16) {
outb(i,0x3d4);
printk("CR%02x=%02x ",i,inb(0x3d5));
} else
printk("------- ");
if (i%16==15)
printk("\n");
}
outb(0x30,0x3ce);
outb(inb(0x3cf) & 0xbf,0x3cf);
printk("\n");
for(i=0; i<=0x7f; i++) {
outb(i,0x3ce);
printk("GR%02x=%02x ",i,inb(0x3cf));
if (i%16==15)
printk("\n");
}
printk("\n");
for(i=0; i<=0xff; i++) {
outb(i,0x3c4);
printk("SR%02x=%02x ",i,inb(0x3c5));
if (i%16==15)
printk("\n");
}
printk("\n");
for(i=0; i <= 0x1F; i++) {
inb(0x3da); // next access is index!
outb(i,0x3c0);
printk("AR%02x=%02x ",i,inb(0x3c1));
if (i%16==15)
printk("\n");
}
printk("\n");
inb(0x3DA); // reset internal flag to 3c0 index
outb(0x20,0x3C0); // enable attr
return;
}
//======================================
//
// Set hardware to requested video mode
//
//======================================
static int cyblafb_set_par(struct fb_info *info)
{
struct cyblafb_par *par = info->par;
u32
htotal,hdispend,hsyncstart,hsyncend,hblankstart,hblankend,preendfetch,
vtotal,vdispend,vsyncstart,vsyncend,vblankstart,vblankend;
struct fb_var_screeninfo *var = &info->var;
int bpp = var->bits_per_pixel;
int i;
if (verbosity > 0)
output("Switching to new mode: "
"fbset -g %d %d %d %d %d -t %d %d %d %d %d %d %d\n",
var->xres,var->yres,var->xres_virtual,
var->yres_virtual,var->bits_per_pixel,var->pixclock,
var->left_margin,var->right_margin,var->upper_margin,
var->lower_margin,var->hsync_len,var->vsync_len);
htotal = (var->xres + var->left_margin + var->right_margin +
var->hsync_len) / 8 - 5;
hdispend = var->xres/8 - 1;
hsyncstart = (var->xres + var->right_margin)/8;
hsyncend = var->hsync_len/8;
hblankstart = hdispend + 1;
hblankend = htotal + 3; // should be htotal + 5, bios does it this way
preendfetch = ((var->xres >> 3) + 1) * ((bpp+1) >> 3);
vtotal = var->yres + var->upper_margin + var->lower_margin +
var->vsync_len - 2;
vdispend = var->yres - 1;
vsyncstart = var->yres + var->lower_margin;
vblankstart = var->yres;
vblankend = vtotal; // should be vtotal + 2, but bios does it this way
vsyncend = var->vsync_len;
enable_mmio(); // necessary! ... check X ...
write3X4(CR11,read3X4(CR11) & 0x7F); // unlock cr00 .. cr07
write3CE(GR30,8);
if ((displaytype == DISPLAY_FP) && var->xres < nativex) {
// stretch or center ?
out8(0x3C2,0xEB);
write3CE(GR30,read3CE(GR30) | 0x81); // shadow mode on
if (center) {
write3CE(GR52,(read3CE(GR52) & 0x7C) | 0x80);
write3CE(GR53,(read3CE(GR53) & 0x7C) | 0x80);
}
else if (stretch) {
write3CE(GR5D,0);
write3CE(GR52,(read3CE(GR52) & 0x7C) | 1);
write3CE(GR53,(read3CE(GR53) & 0x7C) | 1);
}
} else {
out8(0x3C2,0x2B);
write3CE(GR30,8);
}
//
// Setup CRxx regs
//
write3X4(CR00,htotal & 0xFF);
write3X4(CR01,hdispend & 0xFF);
write3X4(CR02,hblankstart & 0xFF);
write3X4(CR03,hblankend & 0x1F);
write3X4(CR04,hsyncstart & 0xFF);
write3X4(CR05,(hsyncend & 0x1F) | ((hblankend & 0x20)<<2));
write3X4(CR06,vtotal & 0xFF);
write3X4(CR07,(vtotal & 0x100) >> 8 |
(vdispend & 0x100) >> 7 |
(vsyncstart & 0x100) >> 6 |
(vblankstart & 0x100) >> 5 |
0x10 |
(vtotal & 0x200) >> 4 |
(vdispend & 0x200) >> 3 |
(vsyncstart & 0x200) >> 2);
write3X4(CR08,0);
write3X4(CR09,(vblankstart & 0x200) >> 4 | 0x40 | // FIX !!!
((info->var.vmode & FB_VMODE_DOUBLE) ? 0x80 : 0));
write3X4(CR0A,0); // Init to some reasonable default
write3X4(CR0B,0); // Init to some reasonable default
write3X4(CR0C,0); // Offset 0
write3X4(CR0D,0); // Offset 0
write3X4(CR0E,0); // Init to some reasonable default
write3X4(CR0F,0); // Init to some reasonable default
write3X4(CR10,vsyncstart & 0xFF);
write3X4(CR11,(vsyncend & 0x0F));
write3X4(CR12,vdispend & 0xFF);
write3X4(CR13,((info->var.xres * bpp)/(4*16)) & 0xFF);
write3X4(CR14,0x40); // double word mode
write3X4(CR15,vblankstart & 0xFF);
write3X4(CR16,vblankend & 0xFF);
write3X4(CR17,0xC3);
write3X4(CR18,0xFF);
// CR19: needed for interlaced modes ... ignore it for now
write3X4(CR1A,0x07); // Arbitration Control Counter 1
write3X4(CR1B,0x07); // Arbitration Control Counter 2
write3X4(CR1C,0x07); // Arbitration Control Counter 3
write3X4(CR1D,0x00); // Don't know, doesn't hurt ;-)
write3X4(CR1E,(info->var.vmode & FB_VMODE_INTERLACED) ? 0x84 : 0x80);
// CR1F: do not set, contains BIOS info about memsize
write3X4(CR20,0x20); // enabe wr buf, disable 16bit planar mode
write3X4(CR21,0x20); // enable linear memory access
// CR22: RO cpu latch readback
// CR23: ???
// CR24: RO AR flag state
// CR25: RAMDAC rw timing, pclk buffer tristate control ????
// CR26: ???
write3X4(CR27,(vdispend & 0x400) >> 6 |
(vsyncstart & 0x400) >> 5 |
(vblankstart & 0x400) >> 4 |
(vtotal & 0x400) >> 3 |
0x8);
// CR28: ???
write3X4(CR29,(read3X4(CR29) & 0xCF) |
((((info->var.xres * bpp) / (4*16)) & 0x300) >>4));
write3X4(CR2A,read3X4(CR2A) | 0x40);
write3X4(CR2B,(htotal & 0x100) >> 8 |
(hdispend & 0x100) >> 7 |
// (0x00 & 0x100) >> 6 | hinterlace para bit 8 ???
(hsyncstart & 0x100) >> 5 |
(hblankstart & 0x100) >> 4);
// CR2C: ???
// CR2D: initialized in cyblafb_setup_GE()
write3X4(CR2F,0x92); // conservative, better signal quality
// CR30: reserved
// CR31: reserved
// CR32: reserved
// CR33: reserved
// CR34: disabled in CR36
// CR35: disabled in CR36
// CR36: initialized in cyblafb_setup_GE
// CR37: i2c, ignore for now
write3X4(CR38,(bpp == 8) ? 0x00 : //
(bpp == 16) ? 0x05 : // highcolor
(bpp == 24) ? 0x29 : // packed 24bit truecolor
(bpp == 32) ? 0x09 : 0); // truecolor, 16 bit pixelbus
write3X4(CR39,0x01 | // MMIO enable
(pcirb ? 0x02 : 0) | // pci read burst enable
(pciwb ? 0x04 : 0)); // pci write burst enable
write3X4(CR55,0x1F | // pci clocks * 2 for STOP# during 1st data phase
(pcirr ? 0x40 : 0) | // pci read retry enable
(pciwr ? 0x80 : 0)); // pci write retry enable
write3X4(CR56,preendfetch >> 8 < 2 ? (preendfetch >> 8 & 0x01)|2 : 0);
write3X4(CR57,preendfetch >> 8 < 2 ? preendfetch & 0xff : 0);
write3X4(CR58,0x82); // Bios does this .... don't know more
//
// Setup SRxx regs
//
write3C4(SR00,3);
write3C4(SR01,1); //set char clock 8 dots wide
write3C4(SR02,0x0F); //enable 4 maps needed in chain4 mode
write3C4(SR03,0); //no character map select
write3C4(SR04,0x0E); //memory mode: ext mem, even, chain4
out8(0x3C4,0x0b);
in8(0x3C5); // Set NEW mode
write3C4(SR0D,0x00); // test ... check
set_vclk(par,(bpp==32 ? 200000000 : 100000000)/
info->var.pixclock); //SR18,SR19
//
// Setup GRxx regs
//
write3CE(GR00,0x00); // test ... check
write3CE(GR01,0x00); // test ... check
write3CE(GR02,0x00); // test ... check
write3CE(GR03,0x00); // test ... check
write3CE(GR04,0x00); // test ... check
write3CE(GR05,0x40); // no CGA compat,allow 256 col
write3CE(GR06,0x05); // graphics mode
write3CE(GR07,0x0F); // planes?
write3CE(GR08,0xFF); // test ... check
write3CE(GR0F,(bpp==32)?0x1A:0x12); // div vclk by 2 if 32bpp, chain4
write3CE(GR20,0xC0); // test ... check
write3CE(GR2F,0xA0); // PCLK = VCLK, no skew,
//
// Setup ARxx regs
//
for(i = 0;i < 0x10;i++) // set AR00 .. AR0f
write3C0(i,i);
write3C0(AR10,0x41); // graphics mode and support 256 color modes
write3C0(AR12,0x0F); // planes
write3C0(AR13,0); // horizontal pel panning
in8(0x3DA); // reset internal flag to 3c0 index
out8(0x3C0,0x20); // enable attr
//
// Setup hidden RAMDAC command register
//
in8(0x3C8); // these reads are
in8(0x3C6); // necessary to
in8(0x3C6); // unmask the RAMDAC
in8(0x3C6); // command reg, otherwise
in8(0x3C6); // we would write the pixelmask reg!
out8(0x3C6,(bpp == 8) ? 0x00 : // 256 colors
(bpp == 15) ? 0x10 : //
(bpp == 16) ? 0x30 : // hicolor
(bpp == 24) ? 0xD0 : // truecolor
(bpp == 32) ? 0xD0 : 0); // truecolor
in8(0x3C8);
//
// GR31 is not mentioned in the datasheet
//
if (displaytype == DISPLAY_FP)
write3CE(GR31,(read3CE(GR31) & 0x8F) |
((info->var.yres > 1024) ? 0x50 :
(info->var.yres > 768) ? 0x30 :
(info->var.yres > 600) ? 0x20 :
(info->var.yres > 480) ? 0x10 : 0));
info->fix.visual = (bpp == 8) ? FB_VISUAL_PSEUDOCOLOR
: FB_VISUAL_TRUECOLOR;
info->fix.line_length = info->var.xres * (bpp >> 3);
info->cmap.len = (bpp == 8) ? 256: 16;
//
// init acceleration engine
//
cyblafb_setup_GE(info->var.xres,info->var.bits_per_pixel);
regdump(par);
return 0;
}
//========================
//
// Set one color register
//
//========================
static int cyblafb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
int bpp = info->var.bits_per_pixel;
if (regno >= info->cmap.len)
return 1;
if (bpp == 8) {
out8(0x3C6,0xFF);
out8(0x3C8,regno);
out8(0x3C9,red>>10);
out8(0x3C9,green>>10);
out8(0x3C9,blue>>10);
} else if (bpp == 16) // RGB 565
((u32*)info->pseudo_palette)[regno] =
(red & 0xF800) |
((green & 0xFC00) >> 5) |
((blue & 0xF800) >> 11);
else if (bpp == 32) // ARGB 8888
((u32*)info->pseudo_palette)[regno] =
((transp & 0xFF00) <<16) |
((red & 0xFF00) << 8) |
((green & 0xFF00)) |
((blue & 0xFF00)>>8);
return 0;
}
//==========================================================
//
// Try blanking the screen. For flat panels it does nothing
//
//==========================================================
static int cyblafb_blank(int blank_mode, struct fb_info *info)
{
unsigned char PMCont,DPMSCont;
if (displaytype == DISPLAY_FP)
return 0;
out8(0x83C8,0x04); // DPMS Control
PMCont = in8(0x83C6) & 0xFC;
DPMSCont = read3CE(GR23) & 0xFC;
switch (blank_mode)
{
case FB_BLANK_UNBLANK: // Screen: On, HSync: On, VSync: On
case FB_BLANK_NORMAL: // Screen: Off, HSync: On, VSync: On
PMCont |= 0x03;
DPMSCont |= 0x00;
break;
case FB_BLANK_HSYNC_SUSPEND: // Screen: Off, HSync: Off, VSync: On
PMCont |= 0x02;
DPMSCont |= 0x01;
break;
case FB_BLANK_VSYNC_SUSPEND: // Screen: Off, HSync: On, VSync: Off
PMCont |= 0x02;
DPMSCont |= 0x02;
break;
case FB_BLANK_POWERDOWN: // Screen: Off, HSync: Off, VSync: Off
PMCont |= 0x00;
DPMSCont |= 0x03;
break;
}
write3CE(GR23,DPMSCont);
out8(0x83C8,4);
out8(0x83C6,PMCont);
//
// let fbcon do a softblank for us
//
return (blank_mode == FB_BLANK_NORMAL) ? 1 : 0;
}
static struct fb_ops cyblafb_ops __devinitdata = {
.owner = THIS_MODULE,
.fb_setcolreg = cyblafb_setcolreg,
.fb_pan_display = cyblafb_pan_display,
.fb_blank = cyblafb_blank,
.fb_check_var = cyblafb_check_var,
.fb_set_par = cyblafb_set_par,
.fb_fillrect = cyblafb_fillrect,
.fb_copyarea= cyblafb_copyarea,
.fb_imageblit = cyblafb_imageblit,
.fb_cursor = soft_cursor,
};
//==========================================================================
//
// getstartupmode() decides about the inital video mode
//
// There is no reason to use modedb, a lot of video modes there would
// need altered timings to display correctly. So I decided that it is much
// better to provide a limited optimized set of modes plus the option of
// using the mode in effect at startup time (might be selected using the
// vga=??? paramter). After that the user might use fbset to select any
// mode he likes, check_var will not try to alter geometry parameters as
// it would be necessary otherwise.
//
//==========================================================================
static int __devinit getstartupmode(struct fb_info *info)
{
u32 htotal,hdispend,hsyncstart,hsyncend,hblankstart,hblankend,
vtotal,vdispend,vsyncstart,vsyncend,vblankstart,vblankend,
cr00,cr01,cr02,cr03,cr04,cr05,cr2b,
cr06,cr07,cr09,cr10,cr11,cr12,cr15,cr16,cr27,
cr38,
sr0d,sr18,sr19,
gr0f,
fi,pxclkdiv,vclkdiv,tmp,i;
struct modus {
int xres; int yres; int vyres; int bpp; int pxclk;
int left_margin; int right_margin; int upper_margin;
int lower_margin; int hsync_len; int vsync_len;
} modedb[5] = {
{ 0, 0, 8000, 0, 0, 0, 0, 0, 0, 0, 0},
{ 640, 480, 3756, 0, 0, -40, 24, 17, 0, 216, 3},
{ 800, 600, 3221, 0, 0, 96, 24, 14, 0, 136, 11},
{1024, 768, 2815, 0, 0, 144, 24, 29, 0, 120, 3},
{1280, 1024, 2662, 0, 0, 232, 16, 39, 0, 160, 3}
};
outb(0x00,0x3d4); cr00=inb(0x3d5); outb(0x01,0x3d4); cr01=inb(0x3d5);
outb(0x02,0x3d4); cr02=inb(0x3d5); outb(0x03,0x3d4); cr03=inb(0x3d5);
outb(0x04,0x3d4); cr04=inb(0x3d5); outb(0x05,0x3d4); cr05=inb(0x3d5);
outb(0x06,0x3d4); cr06=inb(0x3d5); outb(0x07,0x3d4); cr07=inb(0x3d5);
outb(0x09,0x3d4); cr09=inb(0x3d5); outb(0x10,0x3d4); cr10=inb(0x3d5);
outb(0x11,0x3d4); cr11=inb(0x3d5); outb(0x12,0x3d4); cr12=inb(0x3d5);
outb(0x15,0x3d4); cr15=inb(0x3d5); outb(0x16,0x3d4); cr16=inb(0x3d5);
outb(0x27,0x3d4); cr27=inb(0x3d5); outb(0x2b,0x3d4); cr2b=inb(0x3d5);
outb(0x38,0x3d4); cr38=inb(0x3d5); outb(0x0b,0x3c4); inb(0x3c5);
outb(0x0d,0x3c4); sr0d=inb(0x3c5); outb(0x18,0x3c4); sr18=inb(0x3c5);
outb(0x19,0x3c4); sr19=inb(0x3c5); outb(0x0f,0x3ce); gr0f=inb(0x3cf);
htotal = cr00 | (cr2b & 0x01) << 8;
hdispend = cr01 | (cr2b & 0x02) << 7;
hblankstart = cr02 | (cr2b & 0x10) << 4;
hblankend = (cr03 & 0x1f) | (cr05 & 0x80) >> 2;
hsyncstart = cr04 | (cr2b & 0x08) << 5;
hsyncend = cr05 & 0x1f;
modedb[0].xres = hblankstart * 8;
modedb[0].hsync_len = hsyncend * 8;
modedb[0].right_margin = hsyncstart * 8 - modedb[0].xres;
modedb[0].left_margin = (htotal + 5) * 8 - modedb[0].xres -
modedb[0].right_margin - modedb[0].hsync_len;
vtotal = cr06 | (cr07 & 0x01) << 8 | (cr07 & 0x20) << 4
| (cr27 & 0x80) << 3;
vdispend = cr12 | (cr07 & 0x02) << 7 | (cr07 & 0x40) << 3
| (cr27 & 0x10) << 6;
vsyncstart = cr10 | (cr07 & 0x04) << 6 | (cr07 & 0x80) << 2
| (cr27 & 0x20) << 5;
vsyncend = cr11 & 0x0f;
vblankstart = cr15 | (cr07 & 0x08) << 5 | (cr09 & 0x20) << 4
| (cr27 & 0x40) << 4;
vblankend = cr16;
modedb[0].yres = vdispend + 1;
modedb[0].vsync_len = vsyncend;
modedb[0].lower_margin = vsyncstart - modedb[0].yres;
modedb[0].upper_margin = vtotal - modedb[0].yres -
modedb[0].lower_margin - modedb[0].vsync_len + 2;
tmp = cr38 & 0x3c;
modedb[0].bpp = tmp == 0 ? 8 : tmp == 4 ? 16 : tmp == 28 ? 24 :
tmp == 8 ? 32 : 8;
fi = ((5864727*(sr18+8))/(((sr19&0x3f)+2)*(1<<((sr19&0xc0)>>6))))>>12;
pxclkdiv = ((gr0f & 0x08) >> 3 | (gr0f & 0x40) >> 5) + 1;
tmp = sr0d & 0x06;
vclkdiv = tmp == 0 ? 2 : tmp == 2 ? 4 : tmp == 4 ? 8 : 3; // * 2 !
modedb[0].pxclk = ((100000000 * pxclkdiv * vclkdiv) >> 1) / fi;
if (verbosity > 0)
output("detected startup mode: "
"fbset -g %d %d %d ??? %d -t %d %d %d %d %d %d %d\n",
modedb[0].xres,modedb[0].yres,modedb[0].xres,
modedb[0].bpp,modedb[0].pxclk,modedb[0].left_margin,
modedb[0].right_margin,modedb[0].upper_margin,
modedb[0].lower_margin,modedb[0].hsync_len,
modedb[0].vsync_len);
//
// We use this goto target in case of a failed check_var. No, I really
// do not want to do it in another way!
//
tryagain:
i = (mode == NULL) ? 0 :
!strncmp(mode,"640x480",7) ? 1 :
!strncmp(mode,"800x600",7) ? 2 :
!strncmp(mode,"1024x768",8) ? 3 :
!strncmp(mode,"1280x1024",9) ? 4 : 0;
ref = (ref < 50) ? 50 : (ref > 85) ? 85 : ref;
if(i==0) {
info->var.pixclock = modedb[i].pxclk;
info->var.bits_per_pixel = modedb[i].bpp;
} else {
info->var.pixclock = (100000000 /
((modedb[i].left_margin + modedb[i].xres +
modedb[i].right_margin + modedb[i].hsync_len
) * (
modedb[i].upper_margin + modedb[i].yres +
modedb[i].lower_margin + modedb[i].vsync_len
) *
ref / 10000
));
info->var.bits_per_pixel = bpp;
}
info->var.left_margin = modedb[i].left_margin;
info->var.right_margin = modedb[i].right_margin;
info->var.xres = modedb[i].xres;
info->var.xres_virtual = modedb[i].xres;
info->var.xoffset = 0;
info->var.hsync_len = modedb[i].hsync_len;
info->var.upper_margin = modedb[i].upper_margin;
info->var.yres = modedb[i].yres;
info->var.yres_virtual = modedb[i].vyres;
info->var.yoffset = 0;
info->var.lower_margin = modedb[i].lower_margin;
info->var.vsync_len = modedb[i].vsync_len;
info->var.sync = 0;
info->var.vmode = FB_VMODE_NONINTERLACED;
if(cyblafb_check_var(&info->var,info)) {
// 640x480-8@75 should really never fail. One case would
// be fp == 1 and nativex < 640 ... give up then
if(i==1 && bpp == 8 && ref == 75){
output("Can't find a valid mode :-(\n");
return -EINVAL;
}
// Our detected mode is unlikely to fail. If it does,
// try 640x480-8@75 ...
if(i==0) {
mode="640x480";
bpp=8;
ref=75;
output("Detected mode failed check_var! "
"Trying 640x480-8@75\n");
goto tryagain;
}
// A specified video mode failed for some reason.
// Try the startup mode first
output("Specified mode '%s' failed check! "
"Falling back to startup mode.\n",mode);
mode=NULL;
goto tryagain;
}
return 0;
}
//========================================================
//
// Detect activated memory size. Undefined values require
// memsize parameter.
//
//========================================================
static unsigned int __devinit get_memsize(void)
{
unsigned char tmp;
unsigned int k;
if (memsize)
k = memsize * Kb;
else {
tmp = read3X4(CR1F) & 0x0F;
switch (tmp) {
case 0x03: k = 1 * Mb; break;
case 0x07: k = 2 * Mb; break;
case 0x0F: k = 4 * Mb; break;
case 0x04: k = 8 * Mb; break;
default:
k = 1 * Mb;
output("Unknown memory size code %x in CR1F."
" We default to 1 Mb for now, please"
" do provide a memsize parameter!\n",
tmp);
}
}
if (verbosity > 0)
output("framebuffer size = %d Kb\n",k/Kb);
return k;
}
//=========================================================
//
// Detect if a flat panel monitor connected to the special
// interface is active. Override is possible by fp and crt
// parameters.
//
//=========================================================
static unsigned int __devinit get_displaytype(void)
{
if (fp)
return DISPLAY_FP;
if (crt)
return DISPLAY_CRT;
return (read3CE(GR33) & 0x10)?DISPLAY_FP:DISPLAY_CRT;
}
//=====================================
//
// Get native resolution of flat panel
//
//=====================================
static int __devinit get_nativex(void)
{
int x,y,tmp;
if (nativex)
return nativex;
tmp = (read3CE(GR52) >> 4) & 3;
switch (tmp) {
case 0: x = 1280; y = 1024; break;
case 2: x = 1024; y = 768; break;
case 3: x = 800; y = 600; break;
case 4: x = 1400; y = 1050; break;
case 1:
default: x = 640; y = 480; break;
}
if (verbosity > 0)
output("%dx%d flat panel found\n",x,y);
return x;
}
static int __devinit cybla_pci_probe(struct pci_dev * dev,
const struct pci_device_id * id)
{
struct fb_info *info;
struct cyblafb_par *par;
info = framebuffer_alloc(sizeof(struct cyblafb_par),&dev->dev);
if (!info)
goto errout_alloc;
par = info->par;
par->ops = cyblafb_ops;
info->fix = cyblafb_fix;
info->fbops = &par->ops;
info->fix = cyblafb_fix;
if (pci_enable_device(dev)) {
output("could not enable device!\n");
goto errout_enable;
}
// might already be requested by vga console or vesafb,
// so we do care about success
request_region(0x3c0,32,"cyblafb");
//
// Graphics Engine Registers
//
request_region(GEBase,0x100,"cyblafb");
regdump(par);
enable_mmio();
// setup MMIO region
info->fix.mmio_start = pci_resource_start(dev,1);
info->fix.mmio_len = 0x20000;
if (!request_mem_region(info->fix.mmio_start,
info->fix.mmio_len,"cyblafb")) {
output("request_mem_region failed for mmio region!\n");
goto errout_mmio_reqmem;
}
io_virt = ioremap_nocache(info->fix.mmio_start, info->fix.mmio_len);
if (!io_virt) {
output("ioremap failed for mmio region\n");
goto errout_mmio_remap;
}
// setup framebuffer memory ... might already be requested
// by vesafb. Not to fail in case of an unsuccessful request
// is useful for the development cycle
info->fix.smem_start = pci_resource_start(dev,0);
info->fix.smem_len = get_memsize();
if (!request_mem_region(info->fix.smem_start,
info->fix.smem_len,"cyblafb")) {
output("request_mem_region failed for smem region!\n");
if (!vesafb)
goto errout_smem_req;
}
info->screen_base = ioremap_nocache(info->fix.smem_start,
info->fix.smem_len);
if (!info->screen_base) {
output("ioremap failed for smem region\n");
goto errout_smem_remap;
}
displaytype = get_displaytype();
if(displaytype == DISPLAY_FP)
nativex = get_nativex();
//
// FBINFO_HWACCEL_YWRAP .... does not work (could be made to work?)
// FBINFO_PARTIAL_PAN_OK .... is not ok
// FBINFO_READS_FAST .... is necessary for optimal scrolling
//
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN
| FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT
| FBINFO_HWACCEL_IMAGEBLIT | FBINFO_READS_FAST;
info->pseudo_palette = par->pseudo_pal;
if(getstartupmode(info))
goto errout_findmode;
fb_alloc_cmap(&info->cmap,256,0);
if (register_framebuffer(info)) {
output("Could not register CyBla framebuffer\n");
goto errout_register;
}
pci_set_drvdata(dev,info);
//
// normal exit and error paths
//
return 0;
errout_register:
errout_findmode:
iounmap(info->screen_base);
errout_smem_remap:
release_mem_region(info->fix.smem_start,
info->fix.smem_len);
errout_smem_req:
iounmap(io_virt);
errout_mmio_remap:
release_mem_region(info->fix.mmio_start,
info->fix.mmio_len);
errout_mmio_reqmem:
// release_region(0x3c0,32);
errout_enable:
framebuffer_release(info);
errout_alloc:
output("CyblaFB version %s aborting init.\n",VERSION);
return -ENODEV;
}
static void __devexit cybla_pci_remove(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
unregister_framebuffer(info);
iounmap(io_virt);
iounmap(info->screen_base);
release_mem_region(info->fix.smem_start,info->fix.smem_len);
release_mem_region(info->fix.mmio_start,info->fix.mmio_len);
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
output("CyblaFB version %s normal exit.\n",VERSION);
}
//
// List of boards that we are trying to support
//
static struct pci_device_id cybla_devices[] = {
{PCI_VENDOR_ID_TRIDENT,CYBERBLADEi1,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
{0,}
};
MODULE_DEVICE_TABLE(pci,cybla_devices);
static struct pci_driver cyblafb_pci_driver = {
.name = "cyblafb",
.id_table = cybla_devices,
.probe = cybla_pci_probe,
.remove = __devexit_p(cybla_pci_remove)
};
//=============================================================
//
// kernel command line example:
//
// video=cyblafb:1280x1024,bpp=16,ref=50 ...
//
// modprobe command line example:
//
// modprobe cyblafb mode=1280x1024 bpp=16 ref=50 ...
//
//=============================================================
static int __devinit cyblafb_init(void)
{
#ifndef MODULE
char *options = NULL;
char *opt;
if (fb_get_options("cyblafb",&options))
return -ENODEV;
if (options && *options)
while((opt = strsep(&options,",")) != NULL ) {
if (!*opt) continue;
else if (!strncmp(opt,"bpp=",4))
bpp = simple_strtoul(opt+4,NULL,0);
else if (!strncmp(opt,"ref=",4))
ref = simple_strtoul(opt+4,NULL,0);
else if (!strncmp(opt,"fp",2))
displaytype = DISPLAY_FP;
else if (!strncmp(opt,"crt",3))
displaytype = DISPLAY_CRT;
else if (!strncmp(opt,"nativex=",8))
nativex = simple_strtoul(opt+8,NULL,0);
else if (!strncmp(opt,"center",6))
center = 1;
else if (!strncmp(opt,"stretch",7))
stretch = 1;
else if (!strncmp(opt,"pciwb=",6))
pciwb = simple_strtoul(opt+6,NULL,0);
else if (!strncmp(opt,"pcirb=",6))
pcirb = simple_strtoul(opt+6,NULL,0);
else if (!strncmp(opt,"pciwr=",6))
pciwr = simple_strtoul(opt+6,NULL,0);
else if (!strncmp(opt,"pcirr=",6))
pcirr = simple_strtoul(opt+6,NULL,0);
else if (!strncmp(opt,"memsize=",8))
memsize = simple_strtoul(opt+8,NULL,0);
else if (!strncmp(opt,"verbosity=",10))
verbosity = simple_strtoul(opt+10,NULL,0);
else if (!strncmp(opt,"vesafb",6))
vesafb = 1;
else
mode = opt;
}
#endif
output("CyblaFB version %s initializing\n",VERSION);
return pci_module_init(&cyblafb_pci_driver);
}
static void __exit cyblafb_exit(void)
{
pci_unregister_driver(&cyblafb_pci_driver);
}
module_init(cyblafb_init);
module_exit(cyblafb_exit);
MODULE_AUTHOR("Knut Petersen <knut_petersen@t-online.de>");
MODULE_DESCRIPTION("Framebuffer driver for Cyberblade/i1 graphics core");
MODULE_LICENSE("GPL");
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