[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 00000000000..a9948232b13
--- /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