[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>

1 files changed, 171 insertions, 0 deletions

diff --git a/include/video/cyblafb.h b/include/video/cyblafb.h
new file mode 100644
index 000000000000..a9948232b131
--- /dev/null
+++ b/include/video/cyblafb.h
@@ -0,0 +1,171 @@
+
+#ifndef CYBLAFB_DEBUG
+#define CYBLAFB_DEBUG 0
+#endif
+
+#if CYBLAFB_DEBUG
+#define debug(f,a...)   printk("%s:" f,  __FUNCTION__ , ## a);
+#else
+#define debug(f,a...)
+#endif
+
+#define output(f, a...) printk("cyblafb: " f, ## a)
+
+#define Kb      (1024)
+#define Mb      (Kb*Kb)
+
+/* PCI IDS of supported cards temporarily here */
+
+#define CYBERBLADEi1    0x8500
+
+/* these defines are for 'lcd' variable */
+#define LCD_STRETCH     0
+#define LCD_CENTER      1
+#define LCD_BIOS        2
+
+/* display types */
+#define DISPLAY_CRT     0
+#define DISPLAY_FP      1
+
+#define ROP_S   0xCC
+
+#define point(x,y) ((y)<<16|(x))
+
+//
+// Attribute Regs, ARxx, 3c0/3c1
+//
+#define AR00    0x00
+#define AR01    0x01
+#define AR02    0x02
+#define AR03    0x03
+#define AR04    0x04
+#define AR05    0x05
+#define AR06    0x06
+#define AR07    0x07
+#define AR08    0x08
+#define AR09    0x09
+#define AR0A    0x0A
+#define AR0B    0x0B
+#define AR0C    0x0C
+#define AR0D    0x0D
+#define AR0E    0x0E
+#define AR0F    0x0F
+#define AR10    0x10
+#define AR12    0x12
+#define AR13    0x13
+
+//
+// Sequencer Regs, SRxx, 3c4/3c5
+//
+#define SR00    0x00
+#define SR01    0x01
+#define SR02    0x02
+#define SR03    0x03
+#define SR04    0x04
+#define SR0D    0x0D
+#define SR0E    0x0E
+#define SR11    0x11
+#define SR18    0x18
+#define SR19    0x19
+
+//
+//
+//
+#define CR00    0x00
+#define CR01    0x01
+#define CR02    0x02
+#define CR03    0x03
+#define CR04    0x04
+#define CR05    0x05
+#define CR06    0x06
+#define CR07    0x07
+#define CR08    0x08
+#define CR09    0x09
+#define CR0A    0x0A
+#define CR0B    0x0B
+#define CR0C    0x0C
+#define CR0D    0x0D
+#define CR0E    0x0E
+#define CR0F    0x0F
+#define CR10    0x10
+#define CR11    0x11
+#define CR12    0x12
+#define CR13    0x13
+#define CR14    0x14
+#define CR15    0x15
+#define CR16    0x16
+#define CR17    0x17
+#define CR18    0x18
+#define CR19    0x19
+#define CR1A    0x1A
+#define CR1B    0x1B
+#define CR1C    0x1C
+#define CR1D    0x1D
+#define CR1E    0x1E
+#define CR1F    0x1F
+#define CR20    0x20
+#define CR21    0x21
+#define CR27    0x27
+#define CR29    0x29
+#define CR2A    0x2A
+#define CR2B    0x2B
+#define CR2D    0x2D
+#define CR2F    0x2F
+#define CR36    0x36
+#define CR38    0x38
+#define CR39    0x39
+#define CR3A    0x3A
+#define CR55    0x55
+#define CR56    0x56
+#define CR57    0x57
+#define CR58    0x58
+
+//
+//
+//
+
+#define GR00    0x01
+#define GR01    0x01
+#define GR02    0x02
+#define GR03    0x03
+#define GR04    0x04
+#define GR05    0x05
+#define GR06    0x06
+#define GR07    0x07
+#define GR08    0x08
+#define GR0F    0x0F
+#define GR20    0x20
+#define GR23    0x23
+#define GR2F    0x2F
+#define GR30    0x30
+#define GR31    0x31
+#define GR33    0x33
+#define GR52    0x52
+#define GR53    0x53
+#define GR5D    0x5d
+
+
+//
+// Graphics Engine
+//
+#define GEBase  0x2100          // could be mapped elsewhere if we like it
+#define GE00    (GEBase+0x00)   // source 1, p 111
+#define GE04    (GEBase+0x04)   // source 2, p 111
+#define GE08    (GEBase+0x08)   // destination 1, p 111
+#define GE0C    (GEBase+0x0C)   // destination 2, p 112
+#define GE20    (GEBase+0x20)   // engine status, p 113
+#define GE24    (GEBase+0x24)   // reset all GE pointers
+#define GE44    (GEBase+0x44)   // command register, p 126
+#define GE48    (GEBase+0x48)   // raster operation, p 127
+#define GE60    (GEBase+0x60)   // foreground color, p 128
+#define GE64    (GEBase+0x64)   // background color, p 128
+#define GE6C    (GEBase+0x6C)   // Pattern and Style, p 129, ok
+#define GE9C    (GEBase+0x9C)   // pixel engine data port, p 125
+#define GEB8    (GEBase+0xB8)   // Destination Stride / Buffer Base 0, p 133
+#define GEBC    (GEBase+0xBC)   // Destination Stride / Buffer Base 1, p 133
+#define GEC0    (GEBase+0xC0)   // Destination Stride / Buffer Base 2, p 133
+#define GEC4    (GEBase+0xC4)   // Destination Stride / Buffer Base 3, p 133
+#define GEC8    (GEBase+0xC8)   // Source Stride / Buffer Base 0, p 133
+#define GECC    (GEBase+0xCC)   // Source Stride / Buffer Base 1, p 133
+#define GED0    (GEBase+0xD0)   // Source Stride / Buffer Base 2, p 133
+#define GED4    (GEBase+0xD4)   // Source Stride / Buffer Base 3, p 133