Split the existing impact@xbow attachment into generic impact routines, and

bus-specific attachment; impactreg.h and impactvar.h move from sgi/xbow/ to
sgi/dev/.

Teach the generic impact code how to code with pre-ImpactSR boards, which have
a slightly different register layout (information obtained from Peter Fuerst's
Linux IP28 patches).

Add an impact@gio attachment (unfortunately untested, no Impact GIO boards
here). All Indigo 2 graphics options should be supported now (assuming the
Extreme/Ultra will actually work with grtwo(4) out of the box).

Tested not to disturb operation on IP30.

** ATTENTION! If you are building IP27 or IP30 kernels, be sure to rm impact.d
** before building a new kernel.

1 files changed, 112 insertions, 0 deletions

diff --git a/sys/arch/sgi/dev/impactreg.h b/sys/arch/sgi/dev/impactreg.h
new file mode 100644
index 00000000000..15b6f909b2d
--- /dev/null
+++ b/sys/arch/sgi/dev/impactreg.h
@@ -0,0 +1,112 @@
+/*	$OpenBSD: impactreg.h,v 1.1 2012/04/18 17:28:24 miod Exp $	*/
+/*
+ * Copyright (c) 2010 Miodrag Vallat.
+ * Copyright (c) 2009, 2010 Joel Sing <jsing@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Impact and ImpactSR registers
+ */
+
+#define	IMPACTSR_STATUS			0x020000
+#define	IMPACTSR_FIFOSTATUS		0x020008
+#define	IMPACTSR_FIFO_MASK			0x000000ff
+#define	IMPACTSR_GIOSTATUS		0x020100
+#define	IMPACTSR_DMABUSY		0x020200
+#define	IMPACTSR_CFIFO			0x020400
+
+#define	IMPACT_STATUS			0x070000
+#define	IMPACT_FIFOSTATUS		0x070004
+#define	IMPACT_GIOSTATUS		0x070100
+#define	IMPACT_DMABUSY			0x070104
+#define	IMPACT_CFIFO			0x070080
+
+#define	IMPACTSR_CFIFO_HW		0x040000
+#define	IMPACTSR_CFIFO_LW		0x040008
+#define	IMPACTSR_CFIFO_DELAY		0x040010
+#define	IMPACTSR_DFIFO_HW		0x040020
+#define	IMPACTSR_DFIFO_LW		0x040028
+#define	IMPACTSR_DFIFO_DELAY		0x040030
+#define	IMPACT_CFIFO_HW			0x050020
+#define	IMPACT_CFIFO_LW			0x050024
+#define	IMPACT_CFIFO_DELAY		0x050028
+#define	IMPACT_DFIFO_HW			0x05002c
+#define	IMPACT_DFIFO_LW			0x050030
+#define	IMPACT_DFIFO_DELAY		0x050034
+
+#define	IMPACTSR_XMAP_BASE		0x071c00
+#define	IMPACT_XMAP_BASE		0x061c00
+
+#define	IMPACTSR_XMAP_PP1SELECT		0x000008
+#define	IMPACTSR_XMAP_INDEX		0x000088
+#define	IMPACTSR_XMAP_CONFIG		0x000100
+#define	IMPACTSR_XMAP_CONFIGB		0x000108
+#define	IMPACTSR_XMAP_BUF_SELECT	0x000180
+#define	IMPACTSR_XMAP_MAIN_MODE		0x000200
+#define	IMPACTSR_XMAP_OVERLAY_MODE	0x000280
+#define	IMPACTSR_XMAP_DIB		0x000300
+#define	IMPACTSR_XMAP_DIB_DW		0x000340
+#define	IMPACTSR_XMAP_RE_RAC		0x000380
+
+#define	IMPACTSR_VC3_BASE		0x072000
+#define	IMPACT_VC3_BASE			0x062000
+
+#define	IMPACTSR_VC3_INDEX		0x000008
+#define	IMPACTSR_VC3_INDEXDATA		0x000038
+#define	IMPACTSR_VC3_DATA		0x0000b0
+#define	IMPACTSR_VC3_RAM		0x000190
+
+/*
+ * Command FIFO instruction encoding
+ */
+
+#define	IMPACTSR_CFIFO_WRITE		0x0018000400000000UL
+#define	IMPACTSR_CFIFO_EXEC		0x0004000000000000UL
+#define	IMPACTSR_CFIFO_REG_SHIFT	40
+
+/*
+ * Command FIFO registers
+ */
+
+#define	IMPACTSR_CMD_GLINE_XSTARTF	0x0c
+#define	IMPACTSR_CMD_IR_ALIAS		0x45
+#define	IMPACTSR_CMD_BLOCKXYSTARTI	0x46	/* XY coords */
+#define	IMPACTSR_CMD_BLOCKXYENDI	0x47	/* XY coords */
+#define	IMPACTSR_CMD_PACKEDCOLOR	0x5b
+#define	IMPACTSR_CMD_ALPHA		0x5f
+#define	IMPACTSR_CMD_CHAR_H		0x70
+#define	IMPACTSR_CMD_CHAR_L		0x71
+#define	IMPACTSR_CMD_XFRCONTROL		0x102
+#define	IMPACTSR_CMD_FILLMODE		0x110
+#define	IMPACTSR_CMD_CONFIG		0x112
+#define	IMPACTSR_CMD_XYWIN		0x115	/* YX coords */
+#define	IMPACTSR_CMD_BKGRD_RG		0x140
+#define	IMPACTSR_CMD_BKGRD_BA		0x141
+#define	IMPACTSR_CMD_XFRSIZE		0x153	/* YX coords */
+#define	IMPACTSR_CMD_XFRMASKLO		0x156
+#define	IMPACTSR_CMD_XFRMASKHI		0x157
+#define	IMPACTSR_CMD_XFRCOUNTERS	0x158	/* YX coords */
+#define	IMPACTSR_CMD_XFRMODE		0x159
+#define	IMPACTSR_CMD_RE_TOGGLECNTX	0x15f
+#define	IMPACTSR_CMD_PP1FILLMODE	0x161
+#define	IMPACTSR_CMD_COLORMASKMSBS	0x162
+#define	IMPACTSR_CMD_COLORMASKLSBSA	0x163
+#define	IMPACTSR_CMD_COLORMASKLSBSB	0x164
+#define	IMPACTSR_CMD_DRBPOINTERS	0x16d
+
+#define	IMPACTSR_XYCOORDS(x,y)		(((x) << 16) | (y))
+#define	IMPACTSR_YXCOORDS(x,y)		(((y) << 16) | (x))
+
+#define	IMPACTSR_PP1FILLMODE(mode,op)	((mode) | ((op) << 26))