[PATCH] Net: add ath5k wireless driver

add ath5k wireless driver

Portions of this driver are covered by one or both of the ISC and
3-clause BSD licenses.  Specific license information is cited at the top
of each file.

Acked-by and Signed-off-by information is collected from individual
patches as collected in the wireless-2.6 tree prior to upstream
submission.

Acked-by: Matthew W. S. Bell  <mentor@madwifi.org>
Acked-by: Michael Taylor <mike.taylor@apprion.com>
Acked-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bradley M. Kuhn <bkuhn@softwarefreedom.org>
Signed-off-by: Bruno Randolf <bruno@thinktube.com>
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Francesco Gringoli <francesco.gringoli@ing.unibs.it>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Karen Sandler <karen@softwarefreedom.org>
Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Luis R. Rodriguez <mcgrof@gmail.com>
Signed-off-by: Matt Norwood <norwood@softwarefreedom.org>
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: Richard Fontana <fontana@softwarefreedom.org>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Ulrich Meis <meis@nets.rwth-aachen.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1173 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath5k/ath5k.h b/drivers/net/wireless/ath5k/ath5k.h
new file mode 100644
index 0000000..878609f
--- /dev/null
+++ b/drivers/net/wireless/ath5k/ath5k.h
@@ -0,0 +1,1173 @@
+/*
+ * Copyright (c) 2004-2007 Reyk Floeter <reyk@openbsd.org>
+ * Copyright (c) 2006-2007 Nick Kossifidis <mickflemm@gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef _ATH5K_H
+#define _ATH5K_H
+
+/* Set this to 1 to disable regulatory domain restrictions for channel tests.
+ * WARNING: This is for debuging only and has side effects (eg. scan takes too
+ * long and results timeouts). It's also illegal to tune to some of the
+ * supported frequencies in some countries, so use this at your own risk,
+ * you've been warned. */
+#define CHAN_DEBUG	0
+
+#include <linux/io.h>
+#include <linux/types.h>
+#include <net/mac80211.h>
+
+#include "hw.h"
+#include "regdom.h"
+
+/* PCI IDs */
+#define PCI_DEVICE_ID_ATHEROS_AR5210 		0x0007 /* AR5210 */
+#define PCI_DEVICE_ID_ATHEROS_AR5311 		0x0011 /* AR5311 */
+#define PCI_DEVICE_ID_ATHEROS_AR5211 		0x0012 /* AR5211 */
+#define PCI_DEVICE_ID_ATHEROS_AR5212 		0x0013 /* AR5212 */
+#define PCI_DEVICE_ID_3COM_3CRDAG675 		0x0013 /* 3CRDAG675 (Atheros AR5212) */
+#define PCI_DEVICE_ID_3COM_2_3CRPAG175 		0x0013 /* 3CRPAG175 (Atheros AR5212) */
+#define PCI_DEVICE_ID_ATHEROS_AR5210_AP 	0x0207 /* AR5210 (Early) */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_IBM	0x1014 /* AR5212 (IBM MiniPCI) */
+#define PCI_DEVICE_ID_ATHEROS_AR5210_DEFAULT 	0x1107 /* AR5210 (no eeprom) */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_DEFAULT 	0x1113 /* AR5212 (no eeprom) */
+#define PCI_DEVICE_ID_ATHEROS_AR5211_DEFAULT 	0x1112 /* AR5211 (no eeprom) */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_FPGA 	0xf013 /* AR5212 (emulation board) */
+#define PCI_DEVICE_ID_ATHEROS_AR5211_LEGACY 	0xff12 /* AR5211 (emulation board) */
+#define PCI_DEVICE_ID_ATHEROS_AR5211_FPGA11B 	0xf11b /* AR5211 (emulation board) */
+#define PCI_DEVICE_ID_ATHEROS_AR5312_REV2 	0x0052 /* AR5312 WMAC (AP31) */
+#define PCI_DEVICE_ID_ATHEROS_AR5312_REV7 	0x0057 /* AR5312 WMAC (AP30-040) */
+#define PCI_DEVICE_ID_ATHEROS_AR5312_REV8 	0x0058 /* AR5312 WMAC (AP43-030) */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_0014 	0x0014 /* AR5212 compatible */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_0015 	0x0015 /* AR5212 compatible */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_0016 	0x0016 /* AR5212 compatible */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_0017 	0x0017 /* AR5212 compatible */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_0018 	0x0018 /* AR5212 compatible */
+#define PCI_DEVICE_ID_ATHEROS_AR5212_0019 	0x0019 /* AR5212 compatible */
+#define PCI_DEVICE_ID_ATHEROS_AR2413 		0x001a /* AR2413 (Griffin-lite) */
+#define PCI_DEVICE_ID_ATHEROS_AR5413 		0x001b /* AR5413 (Eagle) */
+#define PCI_DEVICE_ID_ATHEROS_AR5424 		0x001c /* AR5424 (Condor PCI-E) */
+#define PCI_DEVICE_ID_ATHEROS_AR5416 		0x0023 /* AR5416 */
+#define PCI_DEVICE_ID_ATHEROS_AR5418 		0x0024 /* AR5418 */
+
+/****************************\
+  GENERIC DRIVER DEFINITIONS
+\****************************/
+
+#define ATH5K_PRINTF(fmt, ...)   printk("%s: " fmt, __func__, ##__VA_ARGS__)
+
+#define ATH5K_PRINTK(_sc, _level, _fmt, ...) \
+	printk(_level "ath5k %s: " _fmt, \
+		((_sc) && (_sc)->hw) ? wiphy_name((_sc)->hw->wiphy) : "", \
+		##__VA_ARGS__)
+
+#define ATH5K_PRINTK_LIMIT(_sc, _level, _fmt, ...) do { \
+	if (net_ratelimit()) \
+		ATH5K_PRINTK(_sc, _level, _fmt, ##__VA_ARGS__); \
+	} while (0)
+
+#define ATH5K_INFO(_sc, _fmt, ...) \
+	ATH5K_PRINTK(_sc, KERN_INFO, _fmt, ##__VA_ARGS__)
+
+#define ATH5K_WARN(_sc, _fmt, ...) \
+	ATH5K_PRINTK_LIMIT(_sc, KERN_WARNING, _fmt, ##__VA_ARGS__)
+
+#define ATH5K_ERR(_sc, _fmt, ...) \
+	ATH5K_PRINTK_LIMIT(_sc, KERN_ERR, _fmt, ##__VA_ARGS__)
+
+/*
+ * Some tuneable values (these should be changeable by the user)
+ */
+#define AR5K_TUNE_DMA_BEACON_RESP		2
+#define AR5K_TUNE_SW_BEACON_RESP		10
+#define AR5K_TUNE_ADDITIONAL_SWBA_BACKOFF	0
+#define AR5K_TUNE_RADAR_ALERT			false
+#define AR5K_TUNE_MIN_TX_FIFO_THRES		1
+#define AR5K_TUNE_MAX_TX_FIFO_THRES		((IEEE80211_MAX_LEN / 64) + 1)
+#define AR5K_TUNE_REGISTER_TIMEOUT		20000
+/* Register for RSSI threshold has a mask of 0xff, so 255 seems to
+ * be the max value. */
+#define AR5K_TUNE_RSSI_THRES                   129
+/* This must be set when setting the RSSI threshold otherwise it can
+ * prevent a reset. If AR5K_RSSI_THR is read after writing to it
+ * the BMISS_THRES will be seen as 0, seems harware doesn't keep
+ * track of it. Max value depends on harware. For AR5210 this is just 7.
+ * For AR5211+ this seems to be up to 255. */
+#define AR5K_TUNE_BMISS_THRES                  7
+#define AR5K_TUNE_REGISTER_DWELL_TIME		20000
+#define AR5K_TUNE_BEACON_INTERVAL		100
+#define AR5K_TUNE_AIFS				2
+#define AR5K_TUNE_AIFS_11B			2
+#define AR5K_TUNE_AIFS_XR			0
+#define AR5K_TUNE_CWMIN				15
+#define AR5K_TUNE_CWMIN_11B			31
+#define AR5K_TUNE_CWMIN_XR			3
+#define AR5K_TUNE_CWMAX				1023
+#define AR5K_TUNE_CWMAX_11B			1023
+#define AR5K_TUNE_CWMAX_XR			7
+#define AR5K_TUNE_NOISE_FLOOR			-72
+#define AR5K_TUNE_MAX_TXPOWER			60
+#define AR5K_TUNE_DEFAULT_TXPOWER		30
+#define AR5K_TUNE_TPC_TXPOWER			true
+#define AR5K_TUNE_ANT_DIVERSITY			true
+#define AR5K_TUNE_HWTXTRIES			4
+
+/* token to use for aifs, cwmin, cwmax in MadWiFi */
+#define	AR5K_TXQ_USEDEFAULT	((u32) -1)
+
+/* GENERIC CHIPSET DEFINITIONS */
+
+/* MAC Chips */
+enum ath5k_version {
+	AR5K_AR5210	= 0,
+	AR5K_AR5211	= 1,
+	AR5K_AR5212	= 2,
+};
+
+/* PHY Chips */
+enum ath5k_radio {
+	AR5K_RF5110	= 0,
+	AR5K_RF5111	= 1,
+	AR5K_RF5112	= 2,
+	AR5K_RF5413	= 3,
+};
+
+/*
+ * Common silicon revision/version values
+ */
+
+enum ath5k_srev_type {
+	AR5K_VERSION_VER,
+	AR5K_VERSION_RAD,
+};
+
+struct ath5k_srev_name {
+	const char		*sr_name;
+	enum ath5k_srev_type	sr_type;
+	u_int			sr_val;
+};
+
+#define AR5K_SREV_UNKNOWN	0xffff
+
+#define AR5K_SREV_VER_AR5210	0x00
+#define AR5K_SREV_VER_AR5311	0x10
+#define AR5K_SREV_VER_AR5311A	0x20
+#define AR5K_SREV_VER_AR5311B	0x30
+#define AR5K_SREV_VER_AR5211	0x40
+#define AR5K_SREV_VER_AR5212	0x50
+#define AR5K_SREV_VER_AR5213	0x55
+#define AR5K_SREV_VER_AR5213A	0x59
+#define AR5K_SREV_VER_AR2424	0xa0
+#define AR5K_SREV_VER_AR5424	0xa3
+#define AR5K_SREV_VER_AR5413	0xa4
+#define AR5K_SREV_VER_AR5414	0xa5
+#define AR5K_SREV_VER_AR5416	0xc0	/* ? */
+#define AR5K_SREV_VER_AR5418	0xca
+
+#define AR5K_SREV_RAD_5110	0x00
+#define AR5K_SREV_RAD_5111	0x10
+#define AR5K_SREV_RAD_5111A	0x15
+#define AR5K_SREV_RAD_2111	0x20
+#define AR5K_SREV_RAD_5112	0x30
+#define AR5K_SREV_RAD_5112A	0x35
+#define AR5K_SREV_RAD_2112	0x40
+#define AR5K_SREV_RAD_2112A	0x45
+#define AR5K_SREV_RAD_SC1	0x63	/* Found on 5413/5414 */
+#define AR5K_SREV_RAD_SC2	0xa2	/* Found on 2424/5424 */
+#define AR5K_SREV_RAD_5133	0xc0	/* MIMO found on 5418 */
+
+/* IEEE defs */
+
+#define IEEE80211_MAX_LEN       2500
+
+/* TODO add support to mac80211 for vendor-specific rates and modes */
+
+/*
+ * Some of this information is based on Documentation from:
+ *
+ * http://madwifi.org/wiki/ChipsetFeatures/SuperAG
+ *
+ * Modulation for Atheros' eXtended Range - range enhancing extension that is
+ * supposed to double the distance an Atheros client device can keep a
+ * connection with an Atheros access point. This is achieved by increasing
+ * the receiver sensitivity up to, -105dBm, which is about 20dB above what
+ * the 802.11 specifications demand. In addition, new (proprietary) data rates
+ * are introduced: 3, 2, 1, 0.5 and 0.25 MBit/s.
+ *
+ * Please note that can you either use XR or TURBO but you cannot use both,
+ * they are exclusive.
+ *
+ */
+#define MODULATION_XR 		0x00000200
+/*
+ * Modulation for Atheros' Turbo G and Turbo A, its supposed to provide a
+ * throughput transmission speed up to 40Mbit/s-60Mbit/s at a 108Mbit/s
+ * signaling rate achieved through the bonding of two 54Mbit/s 802.11g
+ * channels. To use this feature your Access Point must also suport it.
+ * There is also a distinction between "static" and "dynamic" turbo modes:
+ *
+ * - Static: is the dumb version: devices set to this mode stick to it until
+ *     the mode is turned off.
+ * - Dynamic: is the intelligent version, the network decides itself if it
+ *     is ok to use turbo. As soon as traffic is detected on adjacent channels
+ *     (which would get used in turbo mode), or when a non-turbo station joins
+ *     the network, turbo mode won't be used until the situation changes again.
+ *     Dynamic mode is achieved by Atheros' Adaptive Radio (AR) feature which
+ *     monitors the used radio band in order to decide whether turbo mode may
+ *     be used or not.
+ *
+ * This article claims Super G sticks to bonding of channels 5 and 6 for
+ * USA:
+ *
+ * http://www.pcworld.com/article/id,113428-page,1/article.html
+ *
+ * The channel bonding seems to be driver specific though. In addition to
+ * deciding what channels will be used, these "Turbo" modes are accomplished
+ * by also enabling the following features:
+ *
+ * - Bursting: allows multiple frames to be sent at once, rather than pausing
+ *     after each frame. Bursting is a standards-compliant feature that can be
+ *     used with any Access Point.
+ * - Fast frames: increases the amount of information that can be sent per
+ *     frame, also resulting in a reduction of transmission overhead. It is a
+ *     proprietary feature that needs to be supported by the Access Point.
+ * - Compression: data frames are compressed in real time using a Lempel Ziv
+ *     algorithm. This is done transparently. Once this feature is enabled,
+ *     compression and decompression takes place inside the chipset, without
+ *     putting additional load on the host CPU.
+ *
+ */
+#define MODULATION_TURBO	0x00000080
+
+enum ath5k_vendor_mode {
+	MODE_ATHEROS_TURBO = NUM_IEEE80211_MODES+1,
+	MODE_ATHEROS_TURBOG
+};
+
+/* Number of supported mac80211 enum ieee80211_phymode modes by this driver */
+#define NUM_DRIVER_MODES	3
+
+/* adding this flag to rate_code enables short preamble, see ar5212_reg.h */
+#define AR5K_SET_SHORT_PREAMBLE 0x04
+
+#define HAS_SHPREAMBLE(_ix) (rt->rates[_ix].modulation == IEEE80211_RATE_CCK_2)
+#define SHPREAMBLE_FLAG(_ix) (HAS_SHPREAMBLE(_ix) ? AR5K_SET_SHORT_PREAMBLE : 0)
+
+/****************\
+  TX DEFINITIONS
+\****************/
+
+/*
+ * Tx Descriptor
+ */
+struct ath5k_tx_status {
+	u16	ts_seqnum;
+	u16	ts_tstamp;
+	u8	ts_status;
+	u8	ts_rate;
+	s8	ts_rssi;
+	u8	ts_shortretry;
+	u8	ts_longretry;
+	u8	ts_virtcol;
+	u8	ts_antenna;
+};
+
+#define AR5K_TXSTAT_ALTRATE	0x80
+#define AR5K_TXERR_XRETRY	0x01
+#define AR5K_TXERR_FILT		0x02
+#define AR5K_TXERR_FIFO		0x04
+
+/**
+ * enum ath5k_tx_queue - Queue types used to classify tx queues.
+ * @AR5K_TX_QUEUE_INACTIVE: q is unused -- see ath5k_hw_release_tx_queue
+ * @AR5K_TX_QUEUE_DATA: A normal data queue
+ * @AR5K_TX_QUEUE_XR_DATA: An XR-data queue
+ * @AR5K_TX_QUEUE_BEACON: The beacon queue
+ * @AR5K_TX_QUEUE_CAB: The after-beacon queue
+ * @AR5K_TX_QUEUE_UAPSD: Unscheduled Automatic Power Save Delivery queue
+ */
+enum ath5k_tx_queue {
+	AR5K_TX_QUEUE_INACTIVE = 0,
+	AR5K_TX_QUEUE_DATA,
+	AR5K_TX_QUEUE_XR_DATA,
+	AR5K_TX_QUEUE_BEACON,
+	AR5K_TX_QUEUE_CAB,
+	AR5K_TX_QUEUE_UAPSD,
+};
+
+#define	AR5K_NUM_TX_QUEUES		10
+#define	AR5K_NUM_TX_QUEUES_NOQCU	2
+
+/*
+ * Queue syb-types to classify normal data queues.
+ * These are the 4 Access Categories as defined in
+ * WME spec. 0 is the lowest priority and 4 is the
+ * highest. Normal data that hasn't been classified
+ * goes to the Best Effort AC.
+ */
+enum ath5k_tx_queue_subtype {
+	AR5K_WME_AC_BK = 0,	/*Background traffic*/
+	AR5K_WME_AC_BE, 	/*Best-effort (normal) traffic)*/
+	AR5K_WME_AC_VI, 	/*Video traffic*/
+	AR5K_WME_AC_VO, 	/*Voice traffic*/
+};
+
+/*
+ * Queue ID numbers as returned by the hw functions, each number
+ * represents a hw queue. If hw does not support hw queues
+ * (eg 5210) all data goes in one queue. These match
+ * d80211 definitions (net80211/MadWiFi don't use them).
+ */
+enum ath5k_tx_queue_id {
+	AR5K_TX_QUEUE_ID_NOQCU_DATA	= 0,
+	AR5K_TX_QUEUE_ID_NOQCU_BEACON	= 1,
+	AR5K_TX_QUEUE_ID_DATA_MIN	= 0, /*IEEE80211_TX_QUEUE_DATA0*/
+	AR5K_TX_QUEUE_ID_DATA_MAX	= 4, /*IEEE80211_TX_QUEUE_DATA4*/
+	AR5K_TX_QUEUE_ID_DATA_SVP	= 5, /*IEEE80211_TX_QUEUE_SVP - Spectralink Voice Protocol*/
+	AR5K_TX_QUEUE_ID_CAB		= 6, /*IEEE80211_TX_QUEUE_AFTER_BEACON*/
+	AR5K_TX_QUEUE_ID_BEACON		= 7, /*IEEE80211_TX_QUEUE_BEACON*/
+	AR5K_TX_QUEUE_ID_UAPSD		= 8,
+	AR5K_TX_QUEUE_ID_XR_DATA	= 9,
+};
+
+
+/*
+ * Flags to set hw queue's parameters...
+ */
+#define AR5K_TXQ_FLAG_TXOKINT_ENABLE		0x0001	/* Enable TXOK interrupt */
+#define AR5K_TXQ_FLAG_TXERRINT_ENABLE		0x0002	/* Enable TXERR interrupt */
+#define AR5K_TXQ_FLAG_TXEOLINT_ENABLE		0x0004	/* Enable TXEOL interrupt -not used- */
+#define AR5K_TXQ_FLAG_TXDESCINT_ENABLE		0x0008	/* Enable TXDESC interrupt -not used- */
+#define AR5K_TXQ_FLAG_TXURNINT_ENABLE		0x0010	/* Enable TXURN interrupt */
+#define AR5K_TXQ_FLAG_BACKOFF_DISABLE		0x0020	/* Disable random post-backoff */
+#define AR5K_TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE	0x0040	/* Enable ready time expiry policy (?)*/
+#define AR5K_TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE	0x0080	/* Enable backoff while bursting */
+#define AR5K_TXQ_FLAG_POST_FR_BKOFF_DIS		0x0100	/* Disable backoff while bursting */
+#define AR5K_TXQ_FLAG_COMPRESSION_ENABLE	0x0200	/* Enable hw compression -not implemented-*/
+
+/*
+ * A struct to hold tx queue's parameters
+ */
+struct ath5k_txq_info {
+	enum ath5k_tx_queue tqi_type;
+	enum ath5k_tx_queue_subtype tqi_subtype;
+	u16	tqi_flags;	/* Tx queue flags (see above) */
+	u32	tqi_aifs;	/* Arbitrated Interframe Space */
+	s32	tqi_cw_min;	/* Minimum Contention Window */
+	s32	tqi_cw_max;	/* Maximum Contention Window */
+	u32	tqi_cbr_period; /* Constant bit rate period */
+	u32	tqi_cbr_overflow_limit;
+	u32	tqi_burst_time;
+	u32	tqi_ready_time; /* Not used */
+};
+
+/*
+ * Transmit packet types.
+ * These are not fully used inside OpenHAL yet
+ */
+enum ath5k_pkt_type {
+	AR5K_PKT_TYPE_NORMAL		= 0,
+	AR5K_PKT_TYPE_ATIM		= 1,
+	AR5K_PKT_TYPE_PSPOLL		= 2,
+	AR5K_PKT_TYPE_BEACON		= 3,
+	AR5K_PKT_TYPE_PROBE_RESP	= 4,
+	AR5K_PKT_TYPE_PIFS		= 5,
+};
+
+/*
+ * TX power and TPC settings
+ */
+#define AR5K_TXPOWER_OFDM(_r, _v)	(			\
+	((0 & 1) << ((_v) + 6)) |				\
+	(((ah->ah_txpower.txp_rates[(_r)]) & 0x3f) << (_v))	\
+)
+
+#define AR5K_TXPOWER_CCK(_r, _v)	(			\
+	(ah->ah_txpower.txp_rates[(_r)] & 0x3f) << (_v)	\
+)
+
+/*
+ * DMA size definitions (2^n+2)
+ */
+enum ath5k_dmasize {
+	AR5K_DMASIZE_4B	= 0,
+	AR5K_DMASIZE_8B,
+	AR5K_DMASIZE_16B,
+	AR5K_DMASIZE_32B,
+	AR5K_DMASIZE_64B,
+	AR5K_DMASIZE_128B,
+	AR5K_DMASIZE_256B,
+	AR5K_DMASIZE_512B
+};
+
+
+/****************\
+  RX DEFINITIONS
+\****************/
+
+/*
+ * Rx Descriptor
+ */
+struct ath5k_rx_status {
+	u16	rs_datalen;
+	u16	rs_tstamp;
+	u8	rs_status;
+	u8	rs_phyerr;
+	s8	rs_rssi;
+	u8	rs_keyix;
+	u8	rs_rate;
+	u8	rs_antenna;
+	u8	rs_more;
+};
+
+#define AR5K_RXERR_CRC		0x01
+#define AR5K_RXERR_PHY		0x02
+#define AR5K_RXERR_FIFO		0x04
+#define AR5K_RXERR_DECRYPT	0x08
+#define AR5K_RXERR_MIC		0x10
+#define AR5K_RXKEYIX_INVALID	((u8) - 1)
+#define AR5K_TXKEYIX_INVALID	((u32) - 1)
+
+struct ath5k_mib_stats {
+	u32	ackrcv_bad;
+	u32	rts_bad;
+	u32	rts_good;
+	u32	fcs_bad;
+	u32	beacons;
+};
+
+
+
+
+/**************************\
+ BEACON TIMERS DEFINITIONS
+\**************************/
+
+#define AR5K_BEACON_PERIOD	0x0000ffff
+#define AR5K_BEACON_ENA		0x00800000 /*enable beacon xmit*/
+#define AR5K_BEACON_RESET_TSF	0x01000000 /*force a TSF reset*/
+
+#if 0
+/**
+ * struct ath5k_beacon_state - Per-station beacon timer state.
+ * @bs_interval: in TU's, can also include the above flags
+ * @bs_cfp_max_duration: if non-zero hw is setup to coexist with a
+ * 	Point Coordination Function capable AP
+ */
+struct ath5k_beacon_state {
+	u32	bs_next_beacon;
+	u32	bs_next_dtim;
+	u32	bs_interval;
+	u8	bs_dtim_period;
+	u8	bs_cfp_period;
+	u16	bs_cfp_max_duration;
+	u16	bs_cfp_du_remain;
+	u16	bs_tim_offset;
+	u16	bs_sleep_duration;
+	u16	bs_bmiss_threshold;
+	u32  	bs_cfp_next;
+};
+#endif
+
+
+/*
+ * TSF to TU conversion:
+ *
+ * TSF is a 64bit value in usec (microseconds).
+ * TU is a 32bit value in roughly msec (milliseconds): usec / 1024
+ * (1000ms equals 976 TU)
+ */
+#define TSF_TO_TU(_tsf) (u32)((_tsf) >> 10)
+
+
+
+/********************\
+  COMMON DEFINITIONS
+\********************/
+
+/*
+ * Atheros descriptor
+ */
+struct ath5k_desc {
+	u32	ds_link;
+	u32	ds_data;
+	u32	ds_ctl0;
+	u32	ds_ctl1;
+	u32	ds_hw[4];
+
+	union {
+		struct ath5k_rx_status rx;
+		struct ath5k_tx_status tx;
+	} ds_us;
+
+#define ds_rxstat ds_us.rx
+#define ds_txstat ds_us.tx
+
+} __packed;
+
+#define AR5K_RXDESC_INTREQ	0x0020
+
+#define AR5K_TXDESC_CLRDMASK	0x0001
+#define AR5K_TXDESC_NOACK	0x0002	/*[5211+]*/
+#define AR5K_TXDESC_RTSENA	0x0004
+#define AR5K_TXDESC_CTSENA	0x0008
+#define AR5K_TXDESC_INTREQ	0x0010
+#define AR5K_TXDESC_VEOL	0x0020	/*[5211+]*/
+
+#define AR5K_SLOT_TIME_9	396
+#define AR5K_SLOT_TIME_20	880
+#define AR5K_SLOT_TIME_MAX	0xffff
+
+/* channel_flags */
+#define	CHANNEL_CW_INT	0x0008	/* Contention Window interference detected */
+#define	CHANNEL_TURBO	0x0010	/* Turbo Channel */
+#define	CHANNEL_CCK	0x0020	/* CCK channel */
+#define	CHANNEL_OFDM	0x0040	/* OFDM channel */
+#define	CHANNEL_2GHZ	0x0080	/* 2GHz channel. */
+#define	CHANNEL_5GHZ	0x0100	/* 5GHz channel */
+#define	CHANNEL_PASSIVE	0x0200	/* Only passive scan allowed */
+#define	CHANNEL_DYN	0x0400	/* Dynamic CCK-OFDM channel (for g operation) */
+#define	CHANNEL_XR	0x0800	/* XR channel */
+
+#define	CHANNEL_A	(CHANNEL_5GHZ|CHANNEL_OFDM)
+#define	CHANNEL_B	(CHANNEL_2GHZ|CHANNEL_CCK)
+#define	CHANNEL_G	(CHANNEL_2GHZ|CHANNEL_OFDM)
+#define	CHANNEL_T	(CHANNEL_5GHZ|CHANNEL_OFDM|CHANNEL_TURBO)
+#define	CHANNEL_TG	(CHANNEL_2GHZ|CHANNEL_OFDM|CHANNEL_TURBO)
+#define	CHANNEL_108A	CHANNEL_T
+#define	CHANNEL_108G	CHANNEL_TG
+#define	CHANNEL_X	(CHANNEL_5GHZ|CHANNEL_OFDM|CHANNEL_XR)
+
+#define	CHANNEL_ALL 	(CHANNEL_OFDM|CHANNEL_CCK|CHANNEL_2GHZ|CHANNEL_5GHZ| \
+		CHANNEL_TURBO)
+
+#define	CHANNEL_ALL_NOTURBO 	(CHANNEL_ALL & ~CHANNEL_TURBO)
+#define CHANNEL_MODES		CHANNEL_ALL
+
+/*
+ * Used internaly in OpenHAL (ar5211.c/ar5212.c
+ * for reset_tx_queue). Also see struct struct ieee80211_channel.
+ */
+#define IS_CHAN_XR(_c)	((_c.val & CHANNEL_XR) != 0)
+#define IS_CHAN_B(_c)	((_c.val & CHANNEL_B) != 0)
+
+/*
+ * The following structure will be used to map 2GHz channels to
+ * 5GHz Atheros channels.
+ */
+struct ath5k_athchan_2ghz {
+	u32	a2_flags;
+	u16	a2_athchan;
+};
+
+/*
+ * Rate definitions
+ * TODO: Clean them up or move them on mac80211 -most of these infos are
+ * 	 used by the rate control algorytm on MadWiFi.
+ */
+
+/* Max number of rates on the rate table and what it seems
+ * Atheros hardware supports */
+#define AR5K_MAX_RATES 32
+
+/**
+ * struct ath5k_rate - rate structure
+ * @valid: is this a valid rate for the current mode
+ * @modulation: respective mac80211 modulation
+ * @rate_kbps: rate in kbit/s
+ * @rate_code: hardware rate value, used in &struct ath5k_desc, on RX on
+ *     &struct ath5k_rx_status.rs_rate and on TX on
+ *     &struct ath5k_tx_status.ts_rate. Seems the ar5xxx harware supports
+ *     up to 32 rates, indexed by 1-32. This means we really only need
+ *     6 bits for the rate_code.
+ * @dot11_rate: respective IEEE-802.11 rate value
+ * @control_rate: index of rate assumed to be used to send control frames.
+ *     This can be used to set override the value on the rate duration
+ *     registers. This is only useful if we can override in the harware at
+ *     what rate we want to send control frames at. Note that IEEE-802.11
+ *     Ch. 9.6 (after IEEE 802.11g changes) defines the rate at which we
+ *     should send ACK/CTS, if we change this value we can be breaking
+ *     the spec.
+ *
+ * This structure is used to get the RX rate or set the TX rate on the
+ * hardware descriptors. It is also used for internal modulation control
+ * and settings.
+ *
+ * On RX after the &struct ath5k_desc is parsed by the appropriate
+ * ah_proc_rx_desc() the respective hardware rate value is set in
+ * &struct ath5k_rx_status.rs_rate. On TX the desired rate is set in
+ * &struct ath5k_tx_status.ts_rate which is later used to setup the
+ * &struct ath5k_desc correctly. This is the hardware rate map we are
+ * aware of:
+ *
+ * rate_code   1       2       3       4       5       6       7       8
+ * rate_kbps   3000    1000    ?       ?       ?       2000    500     48000
+ *
+ * rate_code   9       10      11      12      13      14      15      16
+ * rate_kbps   24000   12000   6000    54000   36000   18000   9000    ?
+ *
+ * rate_code   17      18      19      20      21      22      23      24
+ * rate_kbps   ?       ?       ?       ?       ?       ?       ?       11000
+ *
+ * rate_code   25      26      27      28      29      30      31      32
+ * rate_kbps   5500    2000    1000    ?       ?       ?       ?       ?
+ *
+ */
+struct ath5k_rate {
+	u8	valid;
+	u32	modulation;
+	u16	rate_kbps;
+	u8	rate_code;
+	u8	dot11_rate;
+	u8	control_rate;
+};
+
+/* XXX: GRR all this stuff to get leds blinking ??? (check out setcurmode) */
+struct ath5k_rate_table {
+	u16	rate_count;
+	u8	rate_code_to_index[AR5K_MAX_RATES];	/* Back-mapping */
+	struct ath5k_rate rates[AR5K_MAX_RATES];
+};
+
+/*
+ * Rate tables...
+ */
+#define AR5K_RATES_11A { 8, {					\
+	255, 255, 255, 255, 255, 255, 255, 255, 6, 4, 2, 0,	\
+	7, 5, 3, 1, 255, 255, 255, 255, 255, 255, 255, 255,	\
+	255, 255, 255, 255, 255, 255, 255, 255 }, {		\
+	{ 1, IEEE80211_RATE_OFDM, 6000, 11, 140, 0 },		\
+	{ 1, IEEE80211_RATE_OFDM, 9000, 15, 18, 0 },		\
+	{ 1, IEEE80211_RATE_OFDM, 12000, 10, 152, 2 },		\
+	{ 1, IEEE80211_RATE_OFDM, 18000, 14, 36, 2 },		\
+	{ 1, IEEE80211_RATE_OFDM, 24000, 9, 176, 4 },		\
+	{ 1, IEEE80211_RATE_OFDM, 36000, 13, 72, 4 },		\
+	{ 1, IEEE80211_RATE_OFDM, 48000, 8, 96, 4 },		\
+	{ 1, IEEE80211_RATE_OFDM, 54000, 12, 108, 4 } }		\
+}
+
+#define AR5K_RATES_11B { 4, {						\
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,	\
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,	\
+	3, 2, 1, 0, 255, 255, 255, 255 }, {				\
+	{ 1, IEEE80211_RATE_CCK, 1000, 27, 130, 0 },	\
+	{ 1, IEEE80211_RATE_CCK_2, 2000, 26, 132, 1 },	\
+	{ 1, IEEE80211_RATE_CCK_2, 5500, 25, 139, 1 },	\
+	{ 1, IEEE80211_RATE_CCK_2, 11000, 24, 150, 1 } }	\
+}
+
+#define AR5K_RATES_11G { 12, {					\
+	255, 255, 255, 255, 255, 255, 255, 255, 10, 8, 6, 4,	\
+	11, 9, 7, 5, 255, 255, 255, 255, 255, 255, 255, 255,	\
+	3, 2, 1, 0, 255, 255, 255, 255 }, {			\
+	{ 1, IEEE80211_RATE_CCK, 1000, 27, 2, 0 },		\
+	{ 1, IEEE80211_RATE_CCK_2, 2000, 26, 4, 1 },		\
+	{ 1, IEEE80211_RATE_CCK_2, 5500, 25, 11, 1 },		\
+	{ 1, IEEE80211_RATE_CCK_2, 11000, 24, 22, 1 },	\
+	{ 0, IEEE80211_RATE_OFDM, 6000, 11, 12, 4 },	\
+	{ 0, IEEE80211_RATE_OFDM, 9000, 15, 18, 4 },	\
+	{ 1, IEEE80211_RATE_OFDM, 12000, 10, 24, 6 },	\
+	{ 1, IEEE80211_RATE_OFDM, 18000, 14, 36, 6 },	\
+	{ 1, IEEE80211_RATE_OFDM, 24000, 9, 48, 8 },	\
+	{ 1, IEEE80211_RATE_OFDM, 36000, 13, 72, 8 },	\
+	{ 1, IEEE80211_RATE_OFDM, 48000, 8, 96, 8 },	\
+	{ 1, IEEE80211_RATE_OFDM, 54000, 12, 108, 8 } }	\
+}
+
+#define AR5K_RATES_TURBO { 8, {					\
+	255, 255, 255, 255, 255, 255, 255, 255, 6, 4, 2, 0,	\
+	7, 5, 3, 1, 255, 255, 255, 255, 255, 255, 255, 255,	\
+	255, 255, 255, 255, 255, 255, 255, 255 }, {		\
+	{ 1, MODULATION_TURBO, 6000, 11, 140, 0 },	\
+	{ 1, MODULATION_TURBO, 9000, 15, 18, 0 },	\
+	{ 1, MODULATION_TURBO, 12000, 10, 152, 2 },	\
+	{ 1, MODULATION_TURBO, 18000, 14, 36, 2 },	\
+	{ 1, MODULATION_TURBO, 24000, 9, 176, 4 },	\
+	{ 1, MODULATION_TURBO, 36000, 13, 72, 4 },	\
+	{ 1, MODULATION_TURBO, 48000, 8, 96, 4 },	\
+	{ 1, MODULATION_TURBO, 54000, 12, 108, 4 } }	\
+}
+
+#define AR5K_RATES_XR { 12, {					\
+	255, 3, 1, 255, 255, 255, 2, 0, 10, 8, 6, 4,		\
+	11, 9, 7, 5, 255, 255, 255, 255, 255, 255, 255, 255,	\
+	255, 255, 255, 255, 255, 255, 255, 255 }, {		\
+	{ 1, MODULATION_XR, 500, 7, 129, 0 },		\
+	{ 1, MODULATION_XR, 1000, 2, 139, 1 },		\
+	{ 1, MODULATION_XR, 2000, 6, 150, 2 },		\
+	{ 1, MODULATION_XR, 3000, 1, 150, 3 },		\
+	{ 1, IEEE80211_RATE_OFDM, 6000, 11, 140, 4 },	\
+	{ 1, IEEE80211_RATE_OFDM, 9000, 15, 18, 4 },	\
+	{ 1, IEEE80211_RATE_OFDM, 12000, 10, 152, 6 },	\
+	{ 1, IEEE80211_RATE_OFDM, 18000, 14, 36, 6 },	\
+	{ 1, IEEE80211_RATE_OFDM, 24000, 9, 176, 8 },	\
+	{ 1, IEEE80211_RATE_OFDM, 36000, 13, 72, 8 },	\
+	{ 1, IEEE80211_RATE_OFDM, 48000, 8, 96, 8 },	\
+	{ 1, IEEE80211_RATE_OFDM, 54000, 12, 108, 8 } }	\
+}
+
+/*
+ * Crypto definitions
+ */
+
+#define AR5K_KEYCACHE_SIZE	8
+
+/***********************\
+ HW RELATED DEFINITIONS
+\***********************/
+
+/*
+ * Misc definitions
+ */
+#define	AR5K_RSSI_EP_MULTIPLIER	(1<<7)
+
+#define AR5K_ASSERT_ENTRY(_e, _s) do {		\
+	if (_e >= _s)				\
+		return (false);			\
+} while (0)
+
+
+enum ath5k_ant_setting {
+	AR5K_ANT_VARIABLE	= 0,	/* variable by programming */
+	AR5K_ANT_FIXED_A	= 1,	/* fixed to 11a frequencies */
+	AR5K_ANT_FIXED_B	= 2,	/* fixed to 11b frequencies */
+	AR5K_ANT_MAX		= 3,
+};
+
+/*
+ * Hardware interrupt abstraction
+ */
+
+/**
+ * enum ath5k_int - Hardware interrupt masks helpers
+ *
+ * @AR5K_INT_RX: mask to identify received frame interrupts, of type
+ * 	AR5K_ISR_RXOK or AR5K_ISR_RXERR
+ * @AR5K_INT_RXDESC: Request RX descriptor/Read RX descriptor (?)
+ * @AR5K_INT_RXNOFRM: No frame received (?)
+ * @AR5K_INT_RXEOL: received End Of List for VEOL (Virtual End Of List). The
+ * 	Queue Control Unit (QCU) signals an EOL interrupt only if a descriptor's
+ * 	LinkPtr is NULL. For more details, refer to:
+ * 	http://www.freepatentsonline.com/20030225739.html
+ * @AR5K_INT_RXORN: Indicates we got RX overrun (eg. no more descriptors).
+ * 	Note that Rx overrun is not always fatal, on some chips we can continue
+ * 	operation without reseting the card, that's why int_fatal is not
+ * 	common for all chips.
+ * @AR5K_INT_TX: mask to identify received frame interrupts, of type
+ * 	AR5K_ISR_TXOK or AR5K_ISR_TXERR
+ * @AR5K_INT_TXDESC: Request TX descriptor/Read TX status descriptor (?)
+ * @AR5K_INT_TXURN: received when we should increase the TX trigger threshold
+ * 	We currently do increments on interrupt by
+ * 	(AR5K_TUNE_MAX_TX_FIFO_THRES - current_trigger_level) / 2
+ * @AR5K_INT_MIB: Indicates the Management Information Base counters should be
+ * 	checked. We should do this with ath5k_hw_update_mib_counters() but
+ * 	it seems we should also then do some noise immunity work.
+ * @AR5K_INT_RXPHY: RX PHY Error
+ * @AR5K_INT_RXKCM: ??
+ * @AR5K_INT_SWBA: SoftWare Beacon Alert - indicates its time to send a
+ * 	beacon that must be handled in software. The alternative is if you
+ * 	have VEOL support, in that case you let the hardware deal with things.
+ * @AR5K_INT_BMISS: If in STA mode this indicates we have stopped seeing
+ * 	beacons from the AP have associated with, we should probably try to
+ * 	reassociate. When in IBSS mode this might mean we have not received
+ * 	any beacons from any local stations. Note that every station in an
+ * 	IBSS schedules to send beacons at the Target Beacon Transmission Time
+ * 	(TBTT) with a random backoff.
+ * @AR5K_INT_BNR: Beacon Not Ready interrupt - ??
+ * @AR5K_INT_GPIO: GPIO interrupt is used for RF Kill, disabled for now
+ * 	until properly handled
+ * @AR5K_INT_FATAL: Fatal errors were encountered, typically caused by DMA
+ * 	errors. These types of errors we can enable seem to be of type
+ * 	AR5K_SIMR2_MCABT, AR5K_SIMR2_SSERR and AR5K_SIMR2_DPERR.
+ * @AR5K_INT_GLOBAL: Seems to be used to clear and set the IER
+ * @AR5K_INT_NOCARD: signals the card has been removed
+ * @AR5K_INT_COMMON: common interrupts shared amogst MACs with the same
+ * 	bit value
+ *
+ * These are mapped to take advantage of some common bits
+ * between the MACs, to be able to set intr properties
+ * easier. Some of them are not used yet inside hw.c. Most map
+ * to the respective hw interrupt value as they are common amogst different
+ * MACs.
+ */
+enum ath5k_int {
+	AR5K_INT_RX	= 0x00000001, /* Not common */
+	AR5K_INT_RXDESC	= 0x00000002,
+	AR5K_INT_RXNOFRM = 0x00000008,
+	AR5K_INT_RXEOL	= 0x00000010,
+	AR5K_INT_RXORN	= 0x00000020,
+	AR5K_INT_TX	= 0x00000040, /* Not common */
+	AR5K_INT_TXDESC	= 0x00000080,
+	AR5K_INT_TXURN	= 0x00000800,
+	AR5K_INT_MIB	= 0x00001000,
+	AR5K_INT_RXPHY	= 0x00004000,
+	AR5K_INT_RXKCM	= 0x00008000,
+	AR5K_INT_SWBA	= 0x00010000,
+	AR5K_INT_BMISS	= 0x00040000,
+	AR5K_INT_BNR	= 0x00100000, /* Not common */
+	AR5K_INT_GPIO	= 0x01000000,
+	AR5K_INT_FATAL	= 0x40000000, /* Not common */
+	AR5K_INT_GLOBAL	= 0x80000000,
+
+	AR5K_INT_COMMON  = AR5K_INT_RXNOFRM
+			| AR5K_INT_RXDESC
+			| AR5K_INT_RXEOL
+			| AR5K_INT_RXORN
+			| AR5K_INT_TXURN
+			| AR5K_INT_TXDESC
+			| AR5K_INT_MIB
+			| AR5K_INT_RXPHY
+			| AR5K_INT_RXKCM
+			| AR5K_INT_SWBA
+			| AR5K_INT_BMISS
+			| AR5K_INT_GPIO,
+	AR5K_INT_NOCARD	= 0xffffffff
+};
+
+/*
+ * Power management
+ */
+enum ath5k_power_mode {
+	AR5K_PM_UNDEFINED = 0,
+	AR5K_PM_AUTO,
+	AR5K_PM_AWAKE,
+	AR5K_PM_FULL_SLEEP,
+	AR5K_PM_NETWORK_SLEEP,
+};
+
+/*
+ * These match net80211 definitions (not used in
+ * d80211).
+ */
+#define AR5K_LED_INIT	0 /*IEEE80211_S_INIT*/
+#define AR5K_LED_SCAN	1 /*IEEE80211_S_SCAN*/
+#define AR5K_LED_AUTH	2 /*IEEE80211_S_AUTH*/
+#define AR5K_LED_ASSOC	3 /*IEEE80211_S_ASSOC*/
+#define AR5K_LED_RUN	4 /*IEEE80211_S_RUN*/
+
+/* GPIO-controlled software LED */
+#define AR5K_SOFTLED_PIN	0
+#define AR5K_SOFTLED_ON		0
+#define AR5K_SOFTLED_OFF	1
+
+/*
+ * Chipset capabilities -see ath5k_hw_get_capability-
+ * get_capability function is not yet fully implemented
+ * in OpenHAL so most of these don't work yet...
+ */
+enum ath5k_capability_type {
+	AR5K_CAP_REG_DMN		= 0,	/* Used to get current reg. domain id */
+	AR5K_CAP_TKIP_MIC		= 2,	/* Can handle TKIP MIC in hardware */
+	AR5K_CAP_TKIP_SPLIT		= 3,	/* TKIP uses split keys */
+	AR5K_CAP_PHYCOUNTERS		= 4,	/* PHY error counters */
+	AR5K_CAP_DIVERSITY		= 5,	/* Supports fast diversity */
+	AR5K_CAP_NUM_TXQUEUES		= 6,	/* Used to get max number of hw txqueues */
+	AR5K_CAP_VEOL			= 7,	/* Supports virtual EOL */
+	AR5K_CAP_COMPRESSION		= 8,	/* Supports compression */
+	AR5K_CAP_BURST			= 9,	/* Supports packet bursting */
+	AR5K_CAP_FASTFRAME		= 10,	/* Supports fast frames */
+	AR5K_CAP_TXPOW			= 11,	/* Used to get global tx power limit */
+	AR5K_CAP_TPC			= 12,	/* Can do per-packet tx power control (needed for 802.11a) */
+	AR5K_CAP_BSSIDMASK		= 13,	/* Supports bssid mask */
+	AR5K_CAP_MCAST_KEYSRCH		= 14,	/* Supports multicast key search */
+	AR5K_CAP_TSF_ADJUST		= 15,	/* Supports beacon tsf adjust */
+	AR5K_CAP_XR			= 16,	/* Supports XR mode */
+	AR5K_CAP_WME_TKIPMIC 		= 17,	/* Supports TKIP MIC when using WMM */
+	AR5K_CAP_CHAN_HALFRATE 		= 18,	/* Supports half rate channels */
+	AR5K_CAP_CHAN_QUARTERRATE 	= 19,	/* Supports quarter rate channels */
+	AR5K_CAP_RFSILENT		= 20,	/* Supports RFsilent */
+};
+
+struct ath5k_capabilities {
+	/*
+	 * Supported PHY modes
+	 * (ie. CHANNEL_A, CHANNEL_B, ...)
+	 */
+	DECLARE_BITMAP(cap_mode, NUM_DRIVER_MODES);
+
+	/*
+	 * Frequency range (without regulation restrictions)
+	 */
+	struct {
+		u16	range_2ghz_min;
+		u16	range_2ghz_max;
+		u16	range_5ghz_min;
+		u16	range_5ghz_max;
+	} cap_range;
+
+	/*
+	 * Active regulation domain settings
+	 */
+	struct {
+		enum ath5k_regdom reg_current;
+		enum ath5k_regdom reg_hw;
+	} cap_regdomain;
+
+	/*
+	 * Values stored in the EEPROM (some of them...)
+	 */
+	struct ath5k_eeprom_info	cap_eeprom;
+
+	/*
+	 * Queue information
+	 */
+	struct {
+		u8	q_tx_num;
+	} cap_queues;
+};
+
+
+/***************************************\
+  HARDWARE ABSTRACTION LAYER STRUCTURE
+\***************************************/
+
+/*
+ * Misc defines
+ */
+
+#define AR5K_MAX_GPIO		10
+#define AR5K_MAX_RF_BANKS	8
+
+struct ath5k_hw {
+	u32			ah_magic;
+
+	struct ath5k_softc	*ah_sc;
+	void __iomem		*ah_iobase;
+
+	enum ath5k_int		ah_imr;
+
+	enum ieee80211_if_types	ah_op_mode;
+	enum ath5k_power_mode	ah_power_mode;
+	struct ieee80211_channel ah_current_channel;
+	bool			ah_turbo;
+	bool			ah_calibration;
+	bool			ah_running;
+	bool			ah_single_chip;
+	enum ath5k_rfgain	ah_rf_gain;
+
+	u32			ah_mac_srev;
+	u16			ah_mac_version;
+	u16			ah_mac_revision;
+	u16			ah_phy_revision;
+	u16			ah_radio_5ghz_revision;
+	u16			ah_radio_2ghz_revision;
+
+	enum ath5k_version	ah_version;
+	enum ath5k_radio	ah_radio;
+	u32			ah_phy;
+
+	bool			ah_5ghz;
+	bool			ah_2ghz;
+
+#define ah_regdomain		ah_capabilities.cap_regdomain.reg_current
+#define ah_regdomain_hw		ah_capabilities.cap_regdomain.reg_hw
+#define ah_modes		ah_capabilities.cap_mode
+#define ah_ee_version		ah_capabilities.cap_eeprom.ee_version
+
+	u32			ah_atim_window;
+	u32			ah_aifs;
+	u32			ah_cw_min;
+	u32			ah_cw_max;
+	bool			ah_software_retry;
+	u32			ah_limit_tx_retries;
+
+	u32			ah_antenna[AR5K_EEPROM_N_MODES][AR5K_ANT_MAX];
+	bool			ah_ant_diversity;
+
+	u8			ah_sta_id[ETH_ALEN];
+
+	/* Current BSSID we are trying to assoc to / creating.
+	 * This is passed by mac80211 on config_interface() and cached here for
+	 * use in resets */
+	u8			ah_bssid[ETH_ALEN];
+
+	u32			ah_gpio[AR5K_MAX_GPIO];
+	int			ah_gpio_npins;
+
+	struct ath5k_capabilities ah_capabilities;
+
+	struct ath5k_txq_info	ah_txq[AR5K_NUM_TX_QUEUES];
+	u32			ah_txq_status;
+	u32			ah_txq_imr_txok;
+	u32			ah_txq_imr_txerr;
+	u32			ah_txq_imr_txurn;
+	u32			ah_txq_imr_txdesc;
+	u32			ah_txq_imr_txeol;
+	u32			*ah_rf_banks;
+	size_t			ah_rf_banks_size;
+	struct ath5k_gain	ah_gain;
+	u32			ah_offset[AR5K_MAX_RF_BANKS];
+
+	struct {
+		u16		txp_pcdac[AR5K_EEPROM_POWER_TABLE_SIZE];
+		u16		txp_rates[AR5K_MAX_RATES];
+		s16		txp_min;
+		s16		txp_max;
+		bool		txp_tpc;
+		s16		txp_ofdm;
+	} ah_txpower;
+
+	struct {
+		bool		r_enabled;
+		int		r_last_alert;
+		struct ieee80211_channel r_last_channel;
+	} ah_radar;
+
+	/* noise floor from last periodic calibration */
+	s32			ah_noise_floor;
+
+	/*
+	 * Function pointers
+	 */
+	int (*ah_setup_tx_desc)(struct ath5k_hw *, struct ath5k_desc *,
+		unsigned int, unsigned int, enum ath5k_pkt_type, unsigned int,
+		unsigned int, unsigned int, unsigned int, unsigned int,
+		unsigned int, unsigned int, unsigned int);
+	bool (*ah_setup_xtx_desc)(struct ath5k_hw *, struct ath5k_desc *,
+		unsigned int, unsigned int, unsigned int, unsigned int,
+		unsigned int, unsigned int);
+	int (*ah_proc_tx_desc)(struct ath5k_hw *, struct ath5k_desc *);
+	int (*ah_proc_rx_desc)(struct ath5k_hw *, struct ath5k_desc *);
+};
+
+/*
+ * Prototypes
+ */
+
+/* General Functions */
+extern int ath5k_hw_register_timeout(struct ath5k_hw *ah, u32 reg, u32 flag, u32 val, bool is_set);
+/* Attach/Detach Functions */
+extern struct ath5k_hw *ath5k_hw_attach(struct ath5k_softc *sc, u8 mac_version);
+extern const struct ath5k_rate_table *ath5k_hw_get_rate_table(struct ath5k_hw *ah, unsigned int mode);
+extern void ath5k_hw_detach(struct ath5k_hw *ah);
+/* Reset Functions */
+extern int ath5k_hw_reset(struct ath5k_hw *ah, enum ieee80211_if_types op_mode, struct ieee80211_channel *channel, bool change_channel);
+/* Power management functions */
+extern int ath5k_hw_set_power(struct ath5k_hw *ah, enum ath5k_power_mode mode, bool set_chip, u16 sleep_duration);
+/* DMA Related Functions */
+extern void ath5k_hw_start_rx(struct ath5k_hw *ah);
+extern int ath5k_hw_stop_rx_dma(struct ath5k_hw *ah);
+extern u32 ath5k_hw_get_rx_buf(struct ath5k_hw *ah);
+extern void ath5k_hw_put_rx_buf(struct ath5k_hw *ah, u32 phys_addr);
+extern int ath5k_hw_tx_start(struct ath5k_hw *ah, unsigned int queue);
+extern int ath5k_hw_stop_tx_dma(struct ath5k_hw *ah, unsigned int queue);
+extern u32 ath5k_hw_get_tx_buf(struct ath5k_hw *ah, unsigned int queue);
+extern int ath5k_hw_put_tx_buf(struct ath5k_hw *ah, unsigned int queue, u32 phys_addr);
+extern int ath5k_hw_update_tx_triglevel(struct ath5k_hw *ah, bool increase);
+/* Interrupt handling */
+extern bool ath5k_hw_is_intr_pending(struct ath5k_hw *ah);
+extern int ath5k_hw_get_isr(struct ath5k_hw *ah, enum ath5k_int *interrupt_mask);
+extern enum ath5k_int ath5k_hw_set_intr(struct ath5k_hw *ah, enum ath5k_int new_mask);
+/* EEPROM access functions */
+extern int ath5k_hw_set_regdomain(struct ath5k_hw *ah, u16 regdomain);
+/* Protocol Control Unit Functions */
+extern int ath5k_hw_set_opmode(struct ath5k_hw *ah);
+/* BSSID Functions */
+extern void ath5k_hw_get_lladdr(struct ath5k_hw *ah, u8 *mac);
+extern int ath5k_hw_set_lladdr(struct ath5k_hw *ah, const u8 *mac);
+extern void ath5k_hw_set_associd(struct ath5k_hw *ah, const u8 *bssid, u16 assoc_id);
+extern int ath5k_hw_set_bssid_mask(struct ath5k_hw *ah, const u8 *mask);
+/* Receive start/stop functions */
+extern void ath5k_hw_start_rx_pcu(struct ath5k_hw *ah);
+extern void ath5k_hw_stop_pcu_recv(struct ath5k_hw *ah);
+/* RX Filter functions */
+extern void ath5k_hw_set_mcast_filter(struct ath5k_hw *ah, u32 filter0, u32 filter1);
+extern int ath5k_hw_set_mcast_filterindex(struct ath5k_hw *ah, u32 index);
+extern int ath5k_hw_clear_mcast_filter_idx(struct ath5k_hw *ah, u32 index);
+extern u32 ath5k_hw_get_rx_filter(struct ath5k_hw *ah);
+extern void ath5k_hw_set_rx_filter(struct ath5k_hw *ah, u32 filter);
+/* Beacon related functions */
+extern u32 ath5k_hw_get_tsf32(struct ath5k_hw *ah);
+extern u64 ath5k_hw_get_tsf64(struct ath5k_hw *ah);
+extern void ath5k_hw_reset_tsf(struct ath5k_hw *ah);
+extern void ath5k_hw_init_beacon(struct ath5k_hw *ah, u32 next_beacon, u32 interval);
+#if 0
+extern int ath5k_hw_set_beacon_timers(struct ath5k_hw *ah, const struct ath5k_beacon_state *state);
+extern void ath5k_hw_reset_beacon(struct ath5k_hw *ah);
+extern int ath5k_hw_beaconq_finish(struct ath5k_hw *ah, unsigned long phys_addr);
+#endif
+extern void ath5k_hw_update_mib_counters(struct ath5k_hw *ah, struct ath5k_mib_stats *statistics);
+/* ACK bit rate */
+void ath5k_hw_set_ack_bitrate_high(struct ath5k_hw *ah, bool high);
+/* ACK/CTS Timeouts */
+extern int ath5k_hw_set_ack_timeout(struct ath5k_hw *ah, unsigned int timeout);
+extern unsigned int ath5k_hw_get_ack_timeout(struct ath5k_hw *ah);
+extern int ath5k_hw_set_cts_timeout(struct ath5k_hw *ah, unsigned int timeout);
+extern unsigned int ath5k_hw_get_cts_timeout(struct ath5k_hw *ah);
+/* Key table (WEP) functions */
+extern int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry);
+extern int ath5k_hw_is_key_valid(struct ath5k_hw *ah, u16 entry);
+extern int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry, const struct ieee80211_key_conf *key, const u8 *mac);
+extern int ath5k_hw_set_key_lladdr(struct ath5k_hw *ah, u16 entry, const u8 *mac);
+/* Queue Control Unit, DFS Control Unit Functions */
+extern int ath5k_hw_setup_tx_queue(struct ath5k_hw *ah, enum ath5k_tx_queue queue_type, struct ath5k_txq_info *queue_info);
+extern int ath5k_hw_setup_tx_queueprops(struct ath5k_hw *ah, int queue, const struct ath5k_txq_info *queue_info);
+extern int ath5k_hw_get_tx_queueprops(struct ath5k_hw *ah, int queue, struct ath5k_txq_info *queue_info);
+extern void ath5k_hw_release_tx_queue(struct ath5k_hw *ah, unsigned int queue);
+extern int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue);
+extern u32 ath5k_hw_num_tx_pending(struct ath5k_hw *ah, unsigned int queue);
+extern int ath5k_hw_set_slot_time(struct ath5k_hw *ah, unsigned int slot_time);
+extern unsigned int ath5k_hw_get_slot_time(struct ath5k_hw *ah);
+/* Hardware Descriptor Functions */
+extern int ath5k_hw_setup_rx_desc(struct ath5k_hw *ah, struct ath5k_desc *desc, u32 size, unsigned int flags);
+/* GPIO Functions */
+extern void ath5k_hw_set_ledstate(struct ath5k_hw *ah, unsigned int state);
+extern int ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio);
+extern int ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio);
+extern u32 ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio);
+extern int ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val);
+extern void ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio, u32 interrupt_level);
+/* Regulatory Domain/Channels Setup */
+extern u16 ath5k_get_regdomain(struct ath5k_hw *ah);
+/* Misc functions */
+extern int ath5k_hw_get_capability(struct ath5k_hw *ah, enum ath5k_capability_type cap_type, u32 capability, u32 *result);
+
+
+/* Initial register settings functions */
+extern int ath5k_hw_write_initvals(struct ath5k_hw *ah, u8 mode, bool change_channel);
+/* Initialize RF */
+extern int ath5k_hw_rfregs(struct ath5k_hw *ah, struct ieee80211_channel *channel, unsigned int mode);
+extern int ath5k_hw_rfgain(struct ath5k_hw *ah, unsigned int freq);
+extern enum ath5k_rfgain ath5k_hw_get_rf_gain(struct ath5k_hw *ah);
+extern int ath5k_hw_set_rfgain_opt(struct ath5k_hw *ah);
+
+
+/* PHY/RF channel functions */
+extern bool ath5k_channel_ok(struct ath5k_hw *ah, u16 freq, unsigned int flags);
+extern int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel);
+/* PHY calibration */
+extern int ath5k_hw_phy_calibrate(struct ath5k_hw *ah, struct ieee80211_channel *channel);
+extern int ath5k_hw_phy_disable(struct ath5k_hw *ah);
+/* Misc PHY functions */
+extern u16 ath5k_hw_radio_revision(struct ath5k_hw *ah, unsigned int chan);
+extern void ath5k_hw_set_def_antenna(struct ath5k_hw *ah, unsigned int ant);
+extern unsigned int ath5k_hw_get_def_antenna(struct ath5k_hw *ah);
+extern int ath5k_hw_noise_floor_calibration(struct ath5k_hw *ah, short freq);
+/* TX power setup */
+extern int ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel, unsigned int txpower);
+extern int ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, unsigned int power);
+
+
+static inline u32 ath5k_hw_reg_read(struct ath5k_hw *ah, u16 reg)
+{
+	return ioread32(ah->ah_iobase + reg);
+}
+
+static inline void ath5k_hw_reg_write(struct ath5k_hw *ah, u32 val, u16 reg)
+{
+	iowrite32(val, ah->ah_iobase + reg);
+}
+
+#endif