Bring in Andrew Thompson's port of Sepherosa Ziehau's bwi driver for

Broadcom BCM43xx chipsets.  This driver uses the v3 firmware that
needs to be fetched separately.  A port will be committed to create
the bwi firmware module.

The driver matches the following chips: Broadcom BCM4301, BCM4307,
BCM4306, BCM4309, BCM4311, BCM4312, BCM4318, BCM4319

The driver works for 802.11b and 802.11g.

Limitations:
	This doesn't support the 802.11a or 802.11n portion of radios.
	Some BCM4306 and BCM4309 cards don't work with Channel 1, 2 or 3.
	Documenation for this firmware is reverse engineered from
		 http://bcm.sipsolutions.net/
	V4 of the firmware is needed for 11a or 11n support
		 http://bcm-v4.sipsolutions.net/
	Firmware needs to be fetched from a third party, port to be committed

# I've tested this with a BCM4319 mini-pci and a BCM4318 CardBus card, and
# not connected it to the build until the firmware port is committed.

Obtained from:	DragonFlyBSD, //depot/projects/vap
Reviewed by:	sam@, thompsa@

1 files changed, 81 insertions, 0 deletions

diff --git a/sys/dev/bwi/bitops.h b/sys/dev/bwi/bitops.h
new file mode 100644
index 0000000..0d6dee8
--- /dev/null
+++ b/sys/dev/bwi/bitops.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2004, 2005 David Young.  All rights reserved.
+ *
+ * Programmed for NetBSD by David Young.
+ *
+ * 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. The name of David Young may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY David Young ``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 David
+ * Young 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 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.
+ *
+ * $DragonFly: src/sys/dev/netif/bwi/bitops.h,v 1.1 2007/09/08 06:15:54 sephe Exp $
+ * $FreeBSD$
+ */
+
+#ifndef _BITOPS_H
+#define _BITOPS_H
+
+/*
+ * __BIT(n): Return a bitmask with bit m set, where the least
+ *           significant bit is bit 0.
+ *
+ * __BITS(m, n): Return a bitmask with bits m through n, inclusive,
+ *               set.  It does not matter whether m>n or m<=n.  The
+ *               least significant bit is bit 0.
+ *
+ * A "bitfield" is a span of consecutive bits defined by a bitmask,
+ * where 1s select the bits in the bitfield.  __SHIFTIN, __SHIFTOUT,
+ * and SHIFTOUT_MASK help read and write bitfields from device registers.
+ *
+ * __SHIFTIN(v, mask): Left-shift bits `v' into the bitfield
+ *                     defined by `mask', and return them.  No
+ *                     side-effects.
+ *
+ * __SHIFTOUT(v, mask): Extract and return the bitfield selected
+ *                      by `mask' from `v', right-shifting the
+ *                      bits so that the rightmost selected bit
+ *                      is at bit 0.  No side-effects.
+ *
+ * __SHIFTOUT_MASK(mask): Right-shift the bits in `mask' so that
+ *                        the rightmost non-zero bit is at bit
+ *                        0.  This is useful for finding the
+ *                        greatest unsigned value that a bitfield
+ *                        can hold.  No side-effects.  Note that
+ *                        SHIFTOUT_MASK(m) = SHIFTOUT(m, m).
+ */
+
+/* __BIT(n): nth bit, where __BIT(0) == 0x1. */
+#define	__BIT(__n) (((__n) == 32) ? 0 : ((uint32_t)1 << (__n)))
+
+/* __BITS(m, n): bits m through n, m < n. */
+#define	__BITS(__m, __n)	\
+	((__BIT(MAX((__m), (__n)) + 1) - 1) ^ (__BIT(MIN((__m), (__n))) - 1))
+
+/* Find least significant bit that is set */
+#define	__LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask))
+
+#define	__SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask))
+#define	__SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask))
+#define	__SHIFTOUT_MASK(__mask) __SHIFTOUT((__mask), (__mask))
+
+#endif	/* !_BITOPS_H */