add support for true RNG presented on the i82802 FWH.

it produces 1 byte at a time and has no ready irq, thus timeout driven.
in fact w/ default hz=100 it produces up to 60% of
gross entropy production in an average loaded desktop system.

1 files changed, 106 insertions, 0 deletions

diff --git a/sys/dev/ic/i82802reg.h b/sys/dev/ic/i82802reg.h
new file mode 100644
index 00000000000..29adc05a1ac
--- /dev/null
+++ b/sys/dev/ic/i82802reg.h
@@ -0,0 +1,106 @@
+/*	$OpenBSD: i82802reg.h,v 1.1 2000/04/10 20:07:47 mickey Exp $	*/
+
+/*
+ * Copyright (c) 2000 Michael Shalayeff
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Michael Shalayeff.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Intel 82802AB/82802AC Firmware Hub
+ *
+ * see:	ftp://download.intel.com/design/chipsets/datashts/29065802.pdf
+ *	and http://developer.intel.com/design/chipsets/manuals/298029.pdf
+ */
+
+/*
+ * unfortunatelly FWH does not show up in the pci device scan, 10x intel.
+ * so all we do is probe for it in the pchb driver at the following address.
+ */
+#define	I82802_IOBASE	0xffb00000
+#define	I82802_IOSIZE	0x00100000
+
+/*
+ * FWH registers
+ * (table 4-4)
+ */
+#define	I82802_BLOCK_LK		0xf0002
+#define	I82802_MINUS01_LK	0xe0002
+#define	I82802_MINUS02_LK	0xd0002
+#define	I82802_MINUS03_LK	0xc0002
+#define	I82802_MINUS04_LK	0xb0002
+#define	I82802_MINUS05_LK	0xa0002
+#define	I82802_MINUS06_LK	0x90002
+#define	I82802_MINUS07_LK	0x80002
+#define	I82802_MINUS08_LK	0x70002
+#define	I82802_MINUS09_LK	0x60002
+#define	I82802_MINUS10_LK	0x50002
+#define	I82802_MINUS11_LK	0x40002
+#define	I82802_MINUS12_LK	0x30002
+#define	I82802_MINUS13_LK	0x20002
+#define	I82802_MINUS14_LK	0x10002
+#define	I82802_MINUS15_LK	0x00002
+#define	I82802_FGPI_REG		0xc0100
+
+/*
+ * T_BLOCK_LK and T_MINUS_* (block locking registers)
+ * (table 4-5)
+ */
+#define	I82802_BLR_RD		0x04
+#define	I82802_BLR_LD		0x02
+#define	I82802_BLR_WL		0x01
+
+/*
+ * Register Based Locking Value Definitions
+ * (tabe 4-6)
+ */
+#define	I82802_LV_FULL		0x00
+#define	I82802_LV_WRITE		0x01
+#define	I82802_LV_DOWN		0x02
+#define	I82802_LV_READ		0x04
+
+/*
+ * General Purpose Inputs Register
+ * (table 4-7)
+ */
+#define	I82802_FGPI_PIN4	0x10	/* PLCC-30/T SOP-7  */
+#define	I82802_FGPI_PIN3	0x08	/* PLCC-30/T SOP-15 */
+#define	I82802_FGPI_PIN2	0x04	/* PLCC-30/T SOP-16 */
+#define	I82802_FGPI_PIN1	0x02	/* PLCC-30/T SOP-17 */
+#define	I82802_FGPI_PIN0	0x01	/* PLCC-30/T SOP-18 */
+
+/*
+ * RNG registers
+ */
+#define	I82802_RNG_HWST		0xc015f
+#define	I82802_RNG_HWST_PRESENT	0x40
+#define	I82802_RNG_HWST_ENABLE	0x01
+#define	I82802_RNG_RNGST	0xc0160
+#define	I82802_RNG_RNGST_DATAV	0x01
+#define	I82802_RNG_DATA		0xc0161
+