[IWLWIFI]: add iwlwifi wireless drivers

This patch adds the mac80211 based wireless drivers for the Intel
PRO/Wireless 3945ABG/BG Network Connection and Intel Wireless WiFi
Link AGN (4965) adapters.

[ Move driver into it's own directory -DaveM ]

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2290 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
new file mode 100644
index 00000000000..26f03a0b878
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -0,0 +1,2290 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/wireless.h>
+#include <linux/firmware.h>
+#include <net/mac80211.h>
+
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+
+#include "iwlwifi.h"
+#include "iwl-helpers.h"
+#include "iwl-3945.h"
+#include "iwl-3945-rs.h"
+
+#define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
+	[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,   \
+				    IWL_RATE_##r##M_IEEE,   \
+				    IWL_RATE_##ip##M_INDEX, \
+				    IWL_RATE_##in##M_INDEX, \
+				    IWL_RATE_##rp##M_INDEX, \
+				    IWL_RATE_##rn##M_INDEX, \
+				    IWL_RATE_##pp##M_INDEX, \
+				    IWL_RATE_##np##M_INDEX }
+
+/*
+ * Parameter order:
+ *   rate, prev rate, next rate, prev tgg rate, next tgg rate
+ *
+ * If there isn't a valid next or previous rate then INV is used which
+ * maps to IWL_RATE_INVALID
+ *
+ */
+const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
+	IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
+	IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),       /*  9mbps */
+	IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
+	IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
+	IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
+	IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
+	IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
+	IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
+	IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),    /*  1mbps */
+	IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),          /*  2mbps */
+	IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
+	IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),      /* 11mbps */
+};
+
+/* 1 = enable the iwl_disable_events() function */
+#define IWL_EVT_DISABLE (0)
+#define IWL_EVT_DISABLE_SIZE (1532/32)
+
+/**
+ * iwl_disable_events - Disable selected events in uCode event log
+ *
+ * Disable an event by writing "1"s into "disable"
+ *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
+ *   Default values of 0 enable uCode events to be logged.
+ * Use for only special debugging.  This function is just a placeholder as-is,
+ *   you'll need to provide the special bits! ...
+ *   ... and set IWL_EVT_DISABLE to 1. */
+void iwl_disable_events(struct iwl_priv *priv)
+{
+	int rc;
+	int i;
+	u32 base;		/* SRAM address of event log header */
+	u32 disable_ptr;	/* SRAM address of event-disable bitmap array */
+	u32 array_size;		/* # of u32 entries in array */
+	u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
+		0x00000000,	/*   31 -    0  Event id numbers */
+		0x00000000,	/*   63 -   32 */
+		0x00000000,	/*   95 -   64 */
+		0x00000000,	/*  127 -   96 */
+		0x00000000,	/*  159 -  128 */
+		0x00000000,	/*  191 -  160 */
+		0x00000000,	/*  223 -  192 */
+		0x00000000,	/*  255 -  224 */
+		0x00000000,	/*  287 -  256 */
+		0x00000000,	/*  319 -  288 */
+		0x00000000,	/*  351 -  320 */
+		0x00000000,	/*  383 -  352 */
+		0x00000000,	/*  415 -  384 */
+		0x00000000,	/*  447 -  416 */
+		0x00000000,	/*  479 -  448 */
+		0x00000000,	/*  511 -  480 */
+		0x00000000,	/*  543 -  512 */
+		0x00000000,	/*  575 -  544 */
+		0x00000000,	/*  607 -  576 */
+		0x00000000,	/*  639 -  608 */
+		0x00000000,	/*  671 -  640 */
+		0x00000000,	/*  703 -  672 */
+		0x00000000,	/*  735 -  704 */
+		0x00000000,	/*  767 -  736 */
+		0x00000000,	/*  799 -  768 */
+		0x00000000,	/*  831 -  800 */
+		0x00000000,	/*  863 -  832 */
+		0x00000000,	/*  895 -  864 */
+		0x00000000,	/*  927 -  896 */
+		0x00000000,	/*  959 -  928 */
+		0x00000000,	/*  991 -  960 */
+		0x00000000,	/* 1023 -  992 */
+		0x00000000,	/* 1055 - 1024 */
+		0x00000000,	/* 1087 - 1056 */
+		0x00000000,	/* 1119 - 1088 */
+		0x00000000,	/* 1151 - 1120 */
+		0x00000000,	/* 1183 - 1152 */
+		0x00000000,	/* 1215 - 1184 */
+		0x00000000,	/* 1247 - 1216 */
+		0x00000000,	/* 1279 - 1248 */
+		0x00000000,	/* 1311 - 1280 */
+		0x00000000,	/* 1343 - 1312 */
+		0x00000000,	/* 1375 - 1344 */
+		0x00000000,	/* 1407 - 1376 */
+		0x00000000,	/* 1439 - 1408 */
+		0x00000000,	/* 1471 - 1440 */
+		0x00000000,	/* 1503 - 1472 */
+	};
+
+	base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
+	if (!iwl_hw_valid_rtc_data_addr(base)) {
+		IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
+		return;
+	}
+
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		IWL_WARNING("Can not read from adapter at this time.\n");
+		return;
+	}
+
+	disable_ptr = iwl_read_restricted_mem(priv, base + (4 * sizeof(u32)));
+	array_size = iwl_read_restricted_mem(priv, base + (5 * sizeof(u32)));
+	iwl_release_restricted_access(priv);
+
+	if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
+		IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
+			       disable_ptr);
+		rc = iwl_grab_restricted_access(priv);
+		for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
+			iwl_write_restricted_mem(priv,
+						 disable_ptr +
+						 (i * sizeof(u32)),
+						 evt_disable[i]);
+
+		iwl_release_restricted_access(priv);
+	} else {
+		IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
+		IWL_DEBUG_INFO("  by writing \"1\"s into disable bitmap\n");
+		IWL_DEBUG_INFO("  in SRAM at 0x%x, size %d u32s\n",
+			       disable_ptr, array_size);
+	}
+
+}
+
+/**
+ * iwl3945_get_antenna_flags - Get antenna flags for RXON command
+ * @priv: eeprom and antenna fields are used to determine antenna flags
+ *
+ * priv->eeprom  is used to determine if antenna AUX/MAIN are reversed
+ * priv->antenna specifies the antenna diversity mode:
+ *
+ * IWL_ANTENNA_DIVERISTY - NIC selects best antenna by itself
+ * IWL_ANTENNA_MAIN      - Force MAIN antenna
+ * IWL_ANTENNA_AUX       - Force AUX antenna
+ */
+__le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
+{
+	switch (priv->antenna) {
+	case IWL_ANTENNA_DIVERSITY:
+		return 0;
+
+	case IWL_ANTENNA_MAIN:
+		if (priv->eeprom.antenna_switch_type)
+			return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
+		return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
+
+	case IWL_ANTENNA_AUX:
+		if (priv->eeprom.antenna_switch_type)
+			return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
+		return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
+	}
+
+	/* bad antenna selector value */
+	IWL_ERROR("Bad antenna selector value (0x%x)\n", priv->antenna);
+	return 0;		/* "diversity" is default if error */
+}
+
+/*****************************************************************************
+ *
+ * Intel PRO/Wireless 3945ABG/BG Network Connection
+ *
+ *  RX handler implementations
+ *
+ *  Used by iwl-base.c
+ *
+ *****************************************************************************/
+
+void iwl_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
+{
+	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
+	IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
+		     (int)sizeof(struct iwl_notif_statistics),
+		     le32_to_cpu(pkt->len));
+
+	memcpy(&priv->statistics, pkt->u.raw, sizeof(priv->statistics));
+
+	priv->last_statistics_time = jiffies;
+}
+
+static void iwl3945_handle_data_packet(struct iwl_priv *priv, int is_data,
+				   struct iwl_rx_mem_buffer *rxb,
+				   struct ieee80211_rx_status *stats,
+				   u16 phy_flags)
+{
+	struct ieee80211_hdr *hdr;
+	struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+	struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
+	struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
+	short len = le16_to_cpu(rx_hdr->len);
+
+	/* We received data from the HW, so stop the watchdog */
+	if (unlikely((len + IWL_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
+		IWL_DEBUG_DROP("Corruption detected!\n");
+		return;
+	}
+
+	/* We only process data packets if the interface is open */
+	if (unlikely(!priv->is_open)) {
+		IWL_DEBUG_DROP_LIMIT
+		    ("Dropping packet while interface is not open.\n");
+		return;
+	}
+	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
+		if (iwl_param_hwcrypto)
+			iwl_set_decrypted_flag(priv, rxb->skb,
+					       le32_to_cpu(rx_end->status),
+					       stats);
+		iwl_handle_data_packet_monitor(priv, rxb, IWL_RX_DATA(pkt),
+					       len, stats, phy_flags);
+		return;
+	}
+
+	skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
+	/* Set the size of the skb to the size of the frame */
+	skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
+
+	hdr = (void *)rxb->skb->data;
+
+	if (iwl_param_hwcrypto)
+		iwl_set_decrypted_flag(priv, rxb->skb,
+				       le32_to_cpu(rx_end->status), stats);
+
+	ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
+	rxb->skb = NULL;
+}
+
+static void iwl3945_rx_reply_rx(struct iwl_priv *priv,
+				struct iwl_rx_mem_buffer *rxb)
+{
+	struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
+	struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
+	struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
+	struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
+	struct ieee80211_hdr *header;
+	u16 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
+	u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
+	u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
+	struct ieee80211_rx_status stats = {
+		.mactime = le64_to_cpu(rx_end->timestamp),
+		.freq = ieee80211chan2mhz(le16_to_cpu(rx_hdr->channel)),
+		.channel = le16_to_cpu(rx_hdr->channel),
+		.phymode = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
+		MODE_IEEE80211G : MODE_IEEE80211A,
+		.antenna = 0,
+		.rate = rx_hdr->rate,
+		.flag = 0,
+	};
+	u8 network_packet;
+	int snr;
+
+	if ((unlikely(rx_stats->phy_count > 20))) {
+		IWL_DEBUG_DROP
+		    ("dsp size out of range [0,20]: "
+		     "%d/n", rx_stats->phy_count);
+		return;
+	}
+
+	if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
+	    || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
+		IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
+		return;
+	}
+
+	if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
+		iwl3945_handle_data_packet(priv, 1, rxb, &stats, phy_flags);
+		return;
+	}
+
+	/* Convert 3945's rssi indicator to dBm */
+	stats.ssi = rx_stats->rssi - IWL_RSSI_OFFSET;
+
+	/* Set default noise value to -127 */
+	if (priv->last_rx_noise == 0)
+		priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
+
+	/* 3945 provides noise info for OFDM frames only.
+	 * sig_avg and noise_diff are measured by the 3945's digital signal
+	 *   processor (DSP), and indicate linear levels of signal level and
+	 *   distortion/noise within the packet preamble after
+	 *   automatic gain control (AGC).  sig_avg should stay fairly
+	 *   constant if the radio's AGC is working well.
+	 * Since these values are linear (not dB or dBm), linear
+	 *   signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
+	 * Convert linear SNR to dB SNR, then subtract that from rssi dBm
+	 *   to obtain noise level in dBm.
+	 * Calculate stats.signal (quality indicator in %) based on SNR. */
+	if (rx_stats_noise_diff) {
+		snr = rx_stats_sig_avg / rx_stats_noise_diff;
+		stats.noise = stats.ssi - iwl_calc_db_from_ratio(snr);
+		stats.signal = iwl_calc_sig_qual(stats.ssi, stats.noise);
+
+	/* If noise info not available, calculate signal quality indicator (%)
+	 *   using just the dBm signal level. */
+	} else {
+		stats.noise = priv->last_rx_noise;
+		stats.signal = iwl_calc_sig_qual(stats.ssi, 0);
+	}
+
+
+	IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
+			stats.ssi, stats.noise, stats.signal,
+			rx_stats_sig_avg, rx_stats_noise_diff);
+
+	stats.freq = ieee80211chan2mhz(stats.channel);
+
+	/* can be covered by iwl_report_frame() in most cases */
+/*      IWL_DEBUG_RX("RX status: 0x%08X\n", rx_end->status); */
+
+	header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
+
+	network_packet = iwl_is_network_packet(priv, header);
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+	if (iwl_debug_level & IWL_DL_STATS && net_ratelimit())
+		IWL_DEBUG_STATS
+		    ("[%c] %d RSSI: %d Signal: %u, Noise: %u, Rate: %u\n",
+		     network_packet ? '*' : ' ',
+		     stats.channel, stats.ssi, stats.ssi,
+		     stats.ssi, stats.rate);
+
+	if (iwl_debug_level & (IWL_DL_RX))
+		/* Set "1" to report good data frames in groups of 100 */
+		iwl_report_frame(priv, pkt, header, 1);
+#endif
+
+	if (network_packet) {
+		priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
+		priv->last_tsf = le64_to_cpu(rx_end->timestamp);
+		priv->last_rx_rssi = stats.ssi;
+		priv->last_rx_noise = stats.noise;
+	}
+
+	switch (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FTYPE) {
+	case IEEE80211_FTYPE_MGMT:
+		switch (le16_to_cpu(header->frame_control) &
+			IEEE80211_FCTL_STYPE) {
+		case IEEE80211_STYPE_PROBE_RESP:
+		case IEEE80211_STYPE_BEACON:{
+				/* If this is a beacon or probe response for
+				 * our network then cache the beacon
+				 * timestamp */
+				if ((((priv->iw_mode == IEEE80211_IF_TYPE_STA)
+				      && !compare_ether_addr(header->addr2,
+							     priv->bssid)) ||
+				     ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
+				      && !compare_ether_addr(header->addr3,
+							     priv->bssid)))) {
+					struct ieee80211_mgmt *mgmt =
+					    (struct ieee80211_mgmt *)header;
+					__le32 *pos;
+					pos =
+					    (__le32 *) & mgmt->u.beacon.
+					    timestamp;
+					priv->timestamp0 = le32_to_cpu(pos[0]);
+					priv->timestamp1 = le32_to_cpu(pos[1]);
+					priv->beacon_int = le16_to_cpu(
+					    mgmt->u.beacon.beacon_int);
+					if (priv->call_post_assoc_from_beacon &&
+					    (priv->iw_mode ==
+						IEEE80211_IF_TYPE_STA))
+						queue_work(priv->workqueue,
+						    &priv->post_associate.work);
+
+					priv->call_post_assoc_from_beacon = 0;
+				}
+
+				break;
+			}
+
+		case IEEE80211_STYPE_ACTION:
+			/* TODO: Parse 802.11h frames for CSA... */
+			break;
+
+			/*
+			 * TODO: There is no callback function from upper
+			 * stack to inform us when associated status. this
+			 * work around to sniff assoc_resp management frame
+			 * and finish the association process.
+			 */
+		case IEEE80211_STYPE_ASSOC_RESP:
+		case IEEE80211_STYPE_REASSOC_RESP:{
+				struct ieee80211_mgmt *mgnt =
+				    (struct ieee80211_mgmt *)header;
+				priv->assoc_id = (~((1 << 15) | (1 << 14)) &
+						  le16_to_cpu(mgnt->u.
+							      assoc_resp.aid));
+				priv->assoc_capability =
+				    le16_to_cpu(mgnt->u.assoc_resp.capab_info);
+				if (priv->beacon_int)
+					queue_work(priv->workqueue,
+					    &priv->post_associate.work);
+				else
+					priv->call_post_assoc_from_beacon = 1;
+				break;
+			}
+
+		case IEEE80211_STYPE_PROBE_REQ:{
+				if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
+					IWL_DEBUG_DROP
+					    ("Dropping (non network): " MAC_FMT
+					     ", " MAC_FMT ", " MAC_FMT "\n",
+					     MAC_ARG(header->addr1),
+					     MAC_ARG(header->addr2),
+					     MAC_ARG(header->addr3));
+				return;
+			}
+		}
+
+		iwl3945_handle_data_packet(priv, 0, rxb, &stats, phy_flags);
+		break;
+
+	case IEEE80211_FTYPE_CTL:
+		break;
+
+	case IEEE80211_FTYPE_DATA:
+		if (unlikely(is_duplicate_packet(priv, header)))
+			IWL_DEBUG_DROP("Dropping (dup): " MAC_FMT ", "
+				       MAC_FMT ", " MAC_FMT "\n",
+				       MAC_ARG(header->addr1),
+				       MAC_ARG(header->addr2),
+				       MAC_ARG(header->addr3));
+		else
+			iwl3945_handle_data_packet(priv, 1, rxb, &stats,
+						   phy_flags);
+		break;
+	}
+}
+
+int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
+				 dma_addr_t addr, u16 len)
+{
+	int count;
+	u32 pad;
+	struct iwl_tfd_frame *tfd = (struct iwl_tfd_frame *)ptr;
+
+	count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
+	pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
+
+	if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
+		IWL_ERROR("Error can not send more than %d chunks\n",
+			  NUM_TFD_CHUNKS);
+		return -EINVAL;
+	}
+
+	tfd->pa[count].addr = cpu_to_le32(addr);
+	tfd->pa[count].len = cpu_to_le32(len);
+
+	count++;
+
+	tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
+					 TFD_CTL_PAD_SET(pad));
+
+	return 0;
+}
+
+/**
+ * iwl_hw_txq_free_tfd - Free one TFD, those at index [txq->q.last_used]
+ *
+ * Does NOT advance any indexes
+ */
+int iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
+{
+	struct iwl_tfd_frame *bd_tmp = (struct iwl_tfd_frame *)&txq->bd[0];
+	struct iwl_tfd_frame *bd = &bd_tmp[txq->q.last_used];
+	struct pci_dev *dev = priv->pci_dev;
+	int i;
+	int counter;
+
+	/* classify bd */
+	if (txq->q.id == IWL_CMD_QUEUE_NUM)
+		/* nothing to cleanup after for host commands */
+		return 0;
+
+	/* sanity check */
+	counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
+	if (counter > NUM_TFD_CHUNKS) {
+		IWL_ERROR("Too many chunks: %i\n", counter);
+		/* @todo issue fatal error, it is quite serious situation */
+		return 0;
+	}
+
+	/* unmap chunks if any */
+
+	for (i = 1; i < counter; i++) {
+		pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
+				 le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
+		if (txq->txb[txq->q.last_used].skb[0]) {
+			struct sk_buff *skb = txq->txb[txq->q.last_used].skb[0];
+			if (txq->txb[txq->q.last_used].skb[0]) {
+				/* Can be called from interrupt context */
+				dev_kfree_skb_any(skb);
+				txq->txb[txq->q.last_used].skb[0] = NULL;
+			}
+		}
+	}
+	return 0;
+}
+
+u8 iwl_hw_find_station(struct iwl_priv *priv, const u8 *addr)
+{
+	int i;
+	int ret = IWL_INVALID_STATION;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->sta_lock, flags);
+	for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
+		if ((priv->stations[i].used) &&
+		    (!compare_ether_addr
+		     (priv->stations[i].sta.sta.addr, addr))) {
+			ret = i;
+			goto out;
+		}
+
+	IWL_DEBUG_INFO("can not find STA " MAC_FMT " (total %d)\n",
+		       MAC_ARG(addr), priv->num_stations);
+ out:
+	spin_unlock_irqrestore(&priv->sta_lock, flags);
+	return ret;
+}
+
+/**
+ * iwl_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
+ *
+*/
+void iwl_hw_build_tx_cmd_rate(struct iwl_priv *priv,
+			      struct iwl_cmd *cmd,
+			      struct ieee80211_tx_control *ctrl,
+			      struct ieee80211_hdr *hdr, int sta_id, int tx_id)
+{
+	unsigned long flags;
+	u16 rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
+	u16 rate_mask;
+	int rate;
+	u8 rts_retry_limit;
+	u8 data_retry_limit;
+	__le32 tx_flags;
+	u16 fc = le16_to_cpu(hdr->frame_control);
+
+	rate = iwl_rates[rate_index].plcp;
+	tx_flags = cmd->cmd.tx.tx_flags;
+
+	/* We need to figure out how to get the sta->supp_rates while
+	 * in this running context; perhaps encoding into ctrl->tx_rate? */
+	rate_mask = IWL_RATES_MASK;
+
+	spin_lock_irqsave(&priv->sta_lock, flags);
+
+	priv->stations[sta_id].current_rate.rate_n_flags = rate;
+
+	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
+	    (sta_id != IWL3945_BROADCAST_ID) &&
+		(sta_id != IWL_MULTICAST_ID))
+		priv->stations[IWL_STA_ID].current_rate.rate_n_flags = rate;
+
+	spin_unlock_irqrestore(&priv->sta_lock, flags);
+
+	if (tx_id >= IWL_CMD_QUEUE_NUM)
+		rts_retry_limit = 3;
+	else
+		rts_retry_limit = 7;
+
+	if (ieee80211_is_probe_response(fc)) {
+		data_retry_limit = 3;
+		if (data_retry_limit < rts_retry_limit)
+			rts_retry_limit = data_retry_limit;
+	} else
+		data_retry_limit = IWL_DEFAULT_TX_RETRY;
+
+	if (priv->data_retry_limit != -1)
+		data_retry_limit = priv->data_retry_limit;
+
+	if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
+		switch (fc & IEEE80211_FCTL_STYPE) {
+		case IEEE80211_STYPE_AUTH:
+		case IEEE80211_STYPE_DEAUTH:
+		case IEEE80211_STYPE_ASSOC_REQ:
+		case IEEE80211_STYPE_REASSOC_REQ:
+			if (tx_flags & TX_CMD_FLG_RTS_MSK) {
+				tx_flags &= ~TX_CMD_FLG_RTS_MSK;
+				tx_flags |= TX_CMD_FLG_CTS_MSK;
+			}
+			break;
+		default:
+			break;
+		}
+	}
+
+	cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
+	cmd->cmd.tx.data_retry_limit = data_retry_limit;
+	cmd->cmd.tx.rate = rate;
+	cmd->cmd.tx.tx_flags = tx_flags;
+
+	/* OFDM */
+	cmd->cmd.tx.supp_rates[0] = rate_mask & IWL_OFDM_RATES_MASK;
+
+	/* CCK */
+	cmd->cmd.tx.supp_rates[1] = (rate_mask >> 8) & 0xF;
+
+	IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
+		       "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
+		       cmd->cmd.tx.rate, le32_to_cpu(cmd->cmd.tx.tx_flags),
+		       cmd->cmd.tx.supp_rates[1], cmd->cmd.tx.supp_rates[0]);
+}
+
+u8 iwl3945_sync_sta(struct iwl_priv *priv, int sta_id, u16 tx_rate, u8 flags)
+{
+	unsigned long flags_spin;
+	struct iwl_station_entry *station;
+
+	if (sta_id == IWL_INVALID_STATION)
+		return IWL_INVALID_STATION;
+
+	spin_lock_irqsave(&priv->sta_lock, flags_spin);
+	station = &priv->stations[sta_id];
+
+	station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
+	station->sta.rate_n_flags = cpu_to_le16(tx_rate);
+	station->current_rate.rate_n_flags = tx_rate;
+	station->sta.mode = STA_CONTROL_MODIFY_MSK;
+
+	spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
+
+	iwl_send_add_station(priv, &station->sta, flags);
+	IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
+			sta_id, tx_rate);
+	return sta_id;
+}
+
+void iwl_hw_card_show_info(struct iwl_priv *priv)
+{
+	IWL_DEBUG_INFO("3945ABG HW Version %u.%u.%u\n",
+		       ((priv->eeprom.board_revision >> 8) & 0x0F),
+		       ((priv->eeprom.board_revision >> 8) >> 4),
+		       (priv->eeprom.board_revision & 0x00FF));
+
+	IWL_DEBUG_INFO("3945ABG PBA Number %.*s\n",
+		       (int)sizeof(priv->eeprom.board_pba_number),
+		       priv->eeprom.board_pba_number);
+
+	IWL_DEBUG_INFO("EEPROM_ANTENNA_SWITCH_TYPE is 0x%02X\n",
+		       priv->eeprom.antenna_switch_type);
+}
+
+static int iwl3945_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
+{
+	int rc;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return rc;
+	}
+
+	if (!pwr_max) {
+		u32 val;
+
+		rc = pci_read_config_dword(priv->pci_dev,
+				PCI_POWER_SOURCE, &val);
+		if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
+			iwl_set_bits_mask_restricted_reg(priv, APMG_PS_CTRL_REG,
+					APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
+					~APMG_PS_CTRL_MSK_PWR_SRC);
+			iwl_release_restricted_access(priv);
+
+			iwl_poll_bit(priv, CSR_GPIO_IN,
+				     CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
+				     CSR_GPIO_IN_BIT_AUX_POWER, 5000);
+		} else
+			iwl_release_restricted_access(priv);
+	} else {
+		iwl_set_bits_mask_restricted_reg(priv, APMG_PS_CTRL_REG,
+				APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
+				~APMG_PS_CTRL_MSK_PWR_SRC);
+
+		iwl_release_restricted_access(priv);
+		iwl_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
+			     CSR_GPIO_IN_BIT_AUX_POWER, 5000);	/* uS */
+	}
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return rc;
+}
+
+static int iwl3945_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
+{
+	int rc;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return rc;
+	}
+
+	iwl_write_restricted(priv, FH_RCSR_RBD_BASE(0), rxq->dma_addr);
+	iwl_write_restricted(priv, FH_RCSR_RPTR_ADDR(0),
+			     priv->hw_setting.shared_phys +
+			     offsetof(struct iwl_shared, rx_read_ptr[0]));
+	iwl_write_restricted(priv, FH_RCSR_WPTR(0), 0);
+	iwl_write_restricted(priv, FH_RCSR_CONFIG(0),
+		ALM_FH_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
+		ALM_FH_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
+		ALM_FH_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
+		ALM_FH_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
+		(RX_QUEUE_SIZE_LOG << ALM_FH_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
+		ALM_FH_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
+		(1 << ALM_FH_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
+		ALM_FH_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
+
+	/* fake read to flush all prev I/O */
+	iwl_read_restricted(priv, FH_RSSR_CTRL);
+
+	iwl_release_restricted_access(priv);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int iwl3945_tx_reset(struct iwl_priv *priv)
+{
+	int rc;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return rc;
+	}
+
+	/* bypass mode */
+	iwl_write_restricted_reg(priv, SCD_MODE_REG, 0x2);
+
+	/* RA 0 is active */
+	iwl_write_restricted_reg(priv, SCD_ARASTAT_REG, 0x01);
+
+	/* all 6 fifo are active */
+	iwl_write_restricted_reg(priv, SCD_TXFACT_REG, 0x3f);
+
+	iwl_write_restricted_reg(priv, SCD_SBYP_MODE_1_REG, 0x010000);
+	iwl_write_restricted_reg(priv, SCD_SBYP_MODE_2_REG, 0x030002);
+	iwl_write_restricted_reg(priv, SCD_TXF4MF_REG, 0x000004);
+	iwl_write_restricted_reg(priv, SCD_TXF5MF_REG, 0x000005);
+
+	iwl_write_restricted(priv, FH_TSSR_CBB_BASE,
+			     priv->hw_setting.shared_phys);
+
+	iwl_write_restricted(priv, FH_TSSR_MSG_CONFIG,
+		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
+		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
+		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
+		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
+		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
+		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
+		ALM_FH_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
+
+	iwl_release_restricted_access(priv);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+/**
+ * iwl3945_txq_ctx_reset - Reset TX queue context
+ *
+ * Destroys all DMA structures and initialize them again
+ */
+static int iwl3945_txq_ctx_reset(struct iwl_priv *priv)
+{
+	int rc;
+	int txq_id, slots_num;
+
+	iwl_hw_txq_ctx_free(priv);
+
+	/* Tx CMD queue */
+	rc = iwl3945_tx_reset(priv);
+	if (rc)
+		goto error;
+
+	/* Tx queue(s) */
+	for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
+		slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
+				TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
+		rc = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
+				txq_id);
+		if (rc) {
+			IWL_ERROR("Tx %d queue init failed\n", txq_id);
+			goto error;
+		}
+	}
+
+	return rc;
+
+ error:
+	iwl_hw_txq_ctx_free(priv);
+	return rc;
+}
+
+int iwl_hw_nic_init(struct iwl_priv *priv)
+{
+	u8 rev_id;
+	int rc;
+	unsigned long flags;
+	struct iwl_rx_queue *rxq = &priv->rxq;
+
+	iwl_power_init_handle(priv);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	iwl_set_bit(priv, CSR_ANA_PLL_CFG, (1 << 24));
+	iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
+		    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
+
+	iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+	rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
+			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
+			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+	if (rc < 0) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		IWL_DEBUG_INFO("Failed to init the card\n");
+		return rc;
+	}
+
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return rc;
+	}
+	iwl_write_restricted_reg(priv, APMG_CLK_EN_REG,
+				 APMG_CLK_VAL_DMA_CLK_RQT |
+				 APMG_CLK_VAL_BSM_CLK_RQT);
+	udelay(20);
+	iwl_set_bits_restricted_reg(priv, APMG_PCIDEV_STT_REG,
+				    APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
+	iwl_release_restricted_access(priv);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	/* Determine HW type */
+	rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
+	if (rc)
+		return rc;
+	IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
+
+	iwl3945_nic_set_pwr_src(priv, 1);
+	spin_lock_irqsave(&priv->lock, flags);
+
+	if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
+		IWL_DEBUG_INFO("RTP type \n");
+	else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
+		IWL_DEBUG_INFO("ALM-MB type\n");
+		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+			    CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MB);
+	} else {
+		IWL_DEBUG_INFO("ALM-MM type\n");
+		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+			    CSR_HW_IF_CONFIG_REG_BIT_ALMAGOR_MM);
+	}
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	/* Initialize the EEPROM */
+	rc = iwl_eeprom_init(priv);
+	if (rc)
+		return rc;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom.sku_cap) {
+		IWL_DEBUG_INFO("SKU OP mode is mrc\n");
+		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+			    CSR_HW_IF_CONFIG_REG_BIT_SKU_MRC);
+	} else
+		IWL_DEBUG_INFO("SKU OP mode is basic\n");
+
+	if ((priv->eeprom.board_revision & 0xF0) == 0xD0) {
+		IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
+			       priv->eeprom.board_revision);
+		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+			    CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
+	} else {
+		IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
+			       priv->eeprom.board_revision);
+		iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
+			      CSR_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
+	}
+
+	if (priv->eeprom.almgor_m_version <= 1) {
+		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+			    CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
+		IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
+			       priv->eeprom.almgor_m_version);
+	} else {
+		IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
+			       priv->eeprom.almgor_m_version);
+		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+			    CSR_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
+	}
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
+		IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
+
+	if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
+		IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
+
+	/* Allocate the RX queue, or reset if it is already allocated */
+	if (!rxq->bd) {
+		rc = iwl_rx_queue_alloc(priv);
+		if (rc) {
+			IWL_ERROR("Unable to initialize Rx queue\n");
+			return -ENOMEM;
+		}
+	} else
+		iwl_rx_queue_reset(priv, rxq);
+
+	iwl_rx_replenish(priv);
+
+	iwl3945_rx_init(priv, rxq);
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	/* Look at using this instead:
+	rxq->need_update = 1;
+	iwl_rx_queue_update_write_ptr(priv, rxq);
+	*/
+
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return rc;
+	}
+	iwl_write_restricted(priv, FH_RCSR_WPTR(0), rxq->write & ~7);
+	iwl_release_restricted_access(priv);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	rc = iwl3945_txq_ctx_reset(priv);
+	if (rc)
+		return rc;
+
+	set_bit(STATUS_INIT, &priv->status);
+
+	return 0;
+}
+
+/**
+ * iwl_hw_txq_ctx_free - Free TXQ Context
+ *
+ * Destroy all TX DMA queues and structures
+ */
+void iwl_hw_txq_ctx_free(struct iwl_priv *priv)
+{
+	int txq_id;
+
+	/* Tx queues */
+	for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
+		iwl_tx_queue_free(priv, &priv->txq[txq_id]);
+}
+
+void iwl_hw_txq_ctx_stop(struct iwl_priv *priv)
+{
+	int queue;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (iwl_grab_restricted_access(priv)) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		iwl_hw_txq_ctx_free(priv);
+		return;
+	}
+
+	/* stop SCD */
+	iwl_write_restricted_reg(priv, SCD_MODE_REG, 0);
+
+	/* reset TFD queues */
+	for (queue = TFD_QUEUE_MIN; queue < TFD_QUEUE_MAX; queue++) {
+		iwl_write_restricted(priv, FH_TCSR_CONFIG(queue), 0x0);
+		iwl_poll_restricted_bit(priv, FH_TSSR_TX_STATUS,
+				ALM_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(queue),
+				1000);
+	}
+
+	iwl_release_restricted_access(priv);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	iwl_hw_txq_ctx_free(priv);
+}
+
+int iwl_hw_nic_stop_master(struct iwl_priv *priv)
+{
+	int rc = 0;
+	u32 reg_val;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	/* set stop master bit */
+	iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
+
+	reg_val = iwl_read32(priv, CSR_GP_CNTRL);
+
+	if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
+	    (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
+		IWL_DEBUG_INFO("Card in power save, master is already "
+			       "stopped\n");
+	else {
+		rc = iwl_poll_bit(priv, CSR_RESET,
+				  CSR_RESET_REG_FLAG_MASTER_DISABLED,
+				  CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
+		if (rc < 0) {
+			spin_unlock_irqrestore(&priv->lock, flags);
+			return rc;
+		}
+	}
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+	IWL_DEBUG_INFO("stop master\n");
+
+	return rc;
+}
+
+int iwl_hw_nic_reset(struct iwl_priv *priv)
+{
+	int rc;
+	unsigned long flags;
+
+	iwl_hw_nic_stop_master(priv);
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
+
+	rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
+			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
+			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+
+	rc = iwl_grab_restricted_access(priv);
+	if (!rc) {
+		iwl_write_restricted_reg(priv, APMG_CLK_CTRL_REG,
+					 APMG_CLK_VAL_BSM_CLK_RQT);
+
+		udelay(10);
+
+		iwl_set_bit(priv, CSR_GP_CNTRL,
+			    CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
+
+		iwl_write_restricted_reg(priv, APMG_RTC_INT_MSK_REG, 0x0);
+		iwl_write_restricted_reg(priv, APMG_RTC_INT_STT_REG,
+					0xFFFFFFFF);
+
+		/* enable DMA */
+		iwl_write_restricted_reg(priv, APMG_CLK_EN_REG,
+					 APMG_CLK_VAL_DMA_CLK_RQT |
+					 APMG_CLK_VAL_BSM_CLK_RQT);
+		udelay(10);
+
+		iwl_set_bits_restricted_reg(priv, APMG_PS_CTRL_REG,
+				APMG_PS_CTRL_VAL_RESET_REQ);
+		udelay(5);
+		iwl_clear_bits_restricted_reg(priv, APMG_PS_CTRL_REG,
+				APMG_PS_CTRL_VAL_RESET_REQ);
+		iwl_release_restricted_access(priv);
+	}
+
+	/* Clear the 'host command active' bit... */
+	clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
+
+	wake_up_interruptible(&priv->wait_command_queue);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return rc;
+}
+
+/**
+ * iwl_hw_reg_adjust_power_by_temp - return index delta into power gain settings table
+ */
+static int iwl_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
+{
+	return (new_reading - old_reading) * (-11) / 100;
+}
+
+/**
+ * iwl_hw_reg_temp_out_of_range - Keep temperature in sane range
+ */
+static inline int iwl_hw_reg_temp_out_of_range(int temperature)
+{
+	return (((temperature < -260) || (temperature > 25)) ? 1 : 0);
+}
+
+int iwl_hw_get_temperature(struct iwl_priv *priv)
+{
+	return iwl_read32(priv, CSR_UCODE_DRV_GP2);
+}
+
+/**
+ * iwl_hw_reg_txpower_get_temperature - get current temperature by reading from NIC
+ */
+static int iwl_hw_reg_txpower_get_temperature(struct iwl_priv *priv)
+{
+	int temperature;
+
+	temperature = iwl_hw_get_temperature(priv);
+
+	/* driver's okay range is -260 to +25.
+	 *   human readable okay range is 0 to +285 */
+	IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
+
+	/* handle insane temp reading */
+	if (iwl_hw_reg_temp_out_of_range(temperature)) {
+		IWL_ERROR("Error bad temperature value  %d\n", temperature);
+
+		/* if really really hot(?),
+		 *   substitute the 3rd band/group's temp measured at factory */
+		if (priv->last_temperature > 100)
+			temperature = priv->eeprom.groups[2].temperature;
+		else /* else use most recent "sane" value from driver */
+			temperature = priv->last_temperature;
+	}
+
+	return temperature;	/* raw, not "human readable" */
+}
+
+/* Adjust Txpower only if temperature variance is greater than threshold.
+ *
+ * Both are lower than older versions' 9 degrees */
+#define IWL_TEMPERATURE_LIMIT_TIMER   6
+
+/**
+ * is_temp_calib_needed - determines if new calibration is needed
+ *
+ * records new temperature in tx_mgr->temperature.
+ * replaces tx_mgr->last_temperature *only* if calib needed
+ *    (assumes caller will actually do the calibration!). */
+static int is_temp_calib_needed(struct iwl_priv *priv)
+{
+	int temp_diff;
+
+	priv->temperature = iwl_hw_reg_txpower_get_temperature(priv);
+	temp_diff = priv->temperature - priv->last_temperature;
+
+	/* get absolute value */
+	if (temp_diff < 0) {
+		IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
+		temp_diff = -temp_diff;
+	} else if (temp_diff == 0)
+		IWL_DEBUG_POWER("Same temp,\n");
+	else
+		IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
+
+	/* if we don't need calibration, *don't* update last_temperature */
+	if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
+		IWL_DEBUG_POWER("Timed thermal calib not needed\n");
+		return 0;
+	}
+
+	IWL_DEBUG_POWER("Timed thermal calib needed\n");
+
+	/* assume that caller will actually do calib ...
+	 *   update the "last temperature" value */
+	priv->last_temperature = priv->temperature;
+	return 1;
+}
+
+#define IWL_MAX_GAIN_ENTRIES 78
+#define IWL_CCK_FROM_OFDM_POWER_DIFF  -5
+#define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
+
+/* radio and DSP power table, each step is 1/2 dB.
+ * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
+static struct iwl_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
+	{
+	 {251, 127},		/* 2.4 GHz, highest power */
+	 {251, 127},
+	 {251, 127},
+	 {251, 127},
+	 {251, 125},
+	 {251, 110},
+	 {251, 105},
+	 {251, 98},
+	 {187, 125},
+	 {187, 115},
+	 {187, 108},
+	 {187, 99},
+	 {243, 119},
+	 {243, 111},
+	 {243, 105},
+	 {243, 97},
+	 {243, 92},
+	 {211, 106},
+	 {211, 100},
+	 {179, 120},
+	 {179, 113},
+	 {179, 107},
+	 {147, 125},
+	 {147, 119},
+	 {147, 112},
+	 {147, 106},
+	 {147, 101},
+	 {147, 97},
+	 {147, 91},
+	 {115, 107},
+	 {235, 121},
+	 {235, 115},
+	 {235, 109},
+	 {203, 127},
+	 {203, 121},
+	 {203, 115},
+	 {203, 108},
+	 {203, 102},
+	 {203, 96},
+	 {203, 92},
+	 {171, 110},
+	 {171, 104},
+	 {171, 98},
+	 {139, 116},
+	 {227, 125},
+	 {227, 119},
+	 {227, 113},
+	 {227, 107},
+	 {227, 101},
+	 {227, 96},
+	 {195, 113},
+	 {195, 106},
+	 {195, 102},
+	 {195, 95},
+	 {163, 113},
+	 {163, 106},
+	 {163, 102},
+	 {163, 95},
+	 {131, 113},
+	 {131, 106},
+	 {131, 102},
+	 {131, 95},
+	 {99, 113},
+	 {99, 106},
+	 {99, 102},
+	 {99, 95},
+	 {67, 113},
+	 {67, 106},
+	 {67, 102},
+	 {67, 95},
+	 {35, 113},
+	 {35, 106},
+	 {35, 102},
+	 {35, 95},
+	 {3, 113},
+	 {3, 106},
+	 {3, 102},
+	 {3, 95} },		/* 2.4 GHz, lowest power */
+	{
+	 {251, 127},		/* 5.x GHz, highest power */
+	 {251, 120},
+	 {251, 114},
+	 {219, 119},
+	 {219, 101},
+	 {187, 113},
+	 {187, 102},
+	 {155, 114},
+	 {155, 103},
+	 {123, 117},
+	 {123, 107},
+	 {123, 99},
+	 {123, 92},
+	 {91, 108},
+	 {59, 125},
+	 {59, 118},
+	 {59, 109},
+	 {59, 102},
+	 {59, 96},
+	 {59, 90},
+	 {27, 104},
+	 {27, 98},
+	 {27, 92},
+	 {115, 118},
+	 {115, 111},
+	 {115, 104},
+	 {83, 126},
+	 {83, 121},
+	 {83, 113},
+	 {83, 105},
+	 {83, 99},
+	 {51, 118},
+	 {51, 111},
+	 {51, 104},
+	 {51, 98},
+	 {19, 116},
+	 {19, 109},
+	 {19, 102},
+	 {19, 98},
+	 {19, 93},
+	 {171, 113},
+	 {171, 107},
+	 {171, 99},
+	 {139, 120},
+	 {139, 113},
+	 {139, 107},
+	 {139, 99},
+	 {107, 120},
+	 {107, 113},
+	 {107, 107},
+	 {107, 99},
+	 {75, 120},
+	 {75, 113},
+	 {75, 107},
+	 {75, 99},
+	 {43, 120},
+	 {43, 113},
+	 {43, 107},
+	 {43, 99},
+	 {11, 120},
+	 {11, 113},
+	 {11, 107},
+	 {11, 99},
+	 {131, 107},
+	 {131, 99},
+	 {99, 120},
+	 {99, 113},
+	 {99, 107},
+	 {99, 99},
+	 {67, 120},
+	 {67, 113},
+	 {67, 107},
+	 {67, 99},
+	 {35, 120},
+	 {35, 113},
+	 {35, 107},
+	 {35, 99},
+	 {3, 120} }		/* 5.x GHz, lowest power */
+};
+
+static inline u8 iwl_hw_reg_fix_power_index(int index)
+{
+	if (index < 0)
+		return 0;
+	if (index >= IWL_MAX_GAIN_ENTRIES)
+		return IWL_MAX_GAIN_ENTRIES - 1;
+	return (u8) index;
+}
+
+/* Kick off thermal recalibration check every 60 seconds */
+#define REG_RECALIB_PERIOD (60)
+
+/**
+ * iwl_hw_reg_set_scan_power - Set Tx power for scan probe requests
+ *
+ * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
+ * or 6 Mbit (OFDM) rates.
+ */
+static void iwl_hw_reg_set_scan_power(struct iwl_priv *priv, u32 scan_tbl_index,
+			       s32 rate_index, const s8 *clip_pwrs,
+			       struct iwl_channel_info *ch_info,
+			       int band_index)
+{
+	struct iwl_scan_power_info *scan_power_info;
+	s8 power;
+	u8 power_index;
+
+	scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
+
+	/* use this channel group's 6Mbit clipping/saturation pwr,
+	 *   but cap at regulatory scan power restriction (set during init
+	 *   based on eeprom channel data) for this channel.  */
+	power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX]);
+
+	/* further limit to user's max power preference.
+	 * FIXME:  Other spectrum management power limitations do not
+	 *   seem to apply?? */
+	power = min(power, priv->user_txpower_limit);
+	scan_power_info->requested_power = power;
+
+	/* find difference between new scan *power* and current "normal"
+	 *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
+	 *   current "normal" temperature-compensated Tx power *index* for
+	 *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
+	 *   *index*. */
+	power_index = ch_info->power_info[rate_index].power_table_index
+	    - (power - ch_info->power_info
+	       [IWL_RATE_6M_INDEX].requested_power) * 2;
+
+	/* store reference index that we use when adjusting *all* scan
+	 *   powers.  So we can accommodate user (all channel) or spectrum
+	 *   management (single channel) power changes "between" temperature
+	 *   feedback compensation procedures.
+	 * don't force fit this reference index into gain table; it may be a
+	 *   negative number.  This will help avoid errors when we're at
+	 *   the lower bounds (highest gains, for warmest temperatures)
+	 *   of the table. */
+
+	/* don't exceed table bounds for "real" setting */
+	power_index = iwl_hw_reg_fix_power_index(power_index);
+
+	scan_power_info->power_table_index = power_index;
+	scan_power_info->tpc.tx_gain =
+	    power_gain_table[band_index][power_index].tx_gain;
+	scan_power_info->tpc.dsp_atten =
+	    power_gain_table[band_index][power_index].dsp_atten;
+}
+
+/**
+ * iwl_hw_reg_send_txpower - fill in Tx Power command with gain settings
+ *
+ * Configures power settings for all rates for the current channel,
+ * using values from channel info struct, and send to NIC
+ */
+int iwl_hw_reg_send_txpower(struct iwl_priv *priv)
+{
+	int rate_idx;
+	const struct iwl_channel_info *ch_info = NULL;
+	struct iwl_txpowertable_cmd txpower = {
+		.channel = priv->active_rxon.channel,
+	};
+
+	txpower.band = (priv->phymode == MODE_IEEE80211A) ? 0 : 1;
+	ch_info = iwl_get_channel_info(priv,
+				       priv->phymode,
+				       le16_to_cpu(priv->active_rxon.channel));
+	if (!ch_info) {
+		IWL_ERROR
+		    ("Failed to get channel info for channel %d [%d]\n",
+		     le16_to_cpu(priv->active_rxon.channel), priv->phymode);
+		return -EINVAL;
+	}
+
+	if (!is_channel_valid(ch_info)) {
+		IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
+				"non-Tx channel.\n");
+		return 0;
+	}
+
+	/* fill cmd with power settings for all rates for current channel */
+	for (rate_idx = 0; rate_idx < IWL_RATE_COUNT; rate_idx++) {
+		txpower.power[rate_idx].tpc = ch_info->power_info[rate_idx].tpc;
+		txpower.power[rate_idx].rate = iwl_rates[rate_idx].plcp;
+
+		IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
+				le16_to_cpu(txpower.channel),
+				txpower.band,
+				txpower.power[rate_idx].tpc.tx_gain,
+				txpower.power[rate_idx].tpc.dsp_atten,
+				txpower.power[rate_idx].rate);
+	}
+
+	return iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
+				sizeof(struct iwl_txpowertable_cmd), &txpower);
+
+}
+
+/**
+ * iwl_hw_reg_set_new_power - Configures power tables at new levels
+ * @ch_info: Channel to update.  Uses power_info.requested_power.
+ *
+ * Replace requested_power and base_power_index ch_info fields for
+ * one channel.
+ *
+ * Called if user or spectrum management changes power preferences.
+ * Takes into account h/w and modulation limitations (clip power).
+ *
+ * This does *not* send anything to NIC, just sets up ch_info for one channel.
+ *
+ * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
+ *	 properly fill out the scan powers, and actual h/w gain settings,
+ *	 and send changes to NIC
+ */
+static int iwl_hw_reg_set_new_power(struct iwl_priv *priv,
+			     struct iwl_channel_info *ch_info)
+{
+	struct iwl_channel_power_info *power_info;
+	int power_changed = 0;
+	int i;
+	const s8 *clip_pwrs;
+	int power;
+
+	/* Get this chnlgrp's rate-to-max/clip-powers table */
+	clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
+
+	/* Get this channel's rate-to-current-power settings table */
+	power_info = ch_info->power_info;
+
+	/* update OFDM Txpower settings */
+	for (i = IWL_FIRST_OFDM_RATE; i <= IWL_LAST_OFDM_RATE;
+	     i++, ++power_info) {
+		int delta_idx;
+
+		/* limit new power to be no more than h/w capability */
+		power = min(ch_info->curr_txpow, clip_pwrs[i]);
+		if (power == power_info->requested_power)
+			continue;
+
+		/* find difference between old and new requested powers,
+		 *    update base (non-temp-compensated) power index */
+		delta_idx = (power - power_info->requested_power) * 2;
+		power_info->base_power_index -= delta_idx;
+
+		/* save new requested power value */
+		power_info->requested_power = power;
+
+		power_changed = 1;
+	}
+
+	/* update CCK Txpower settings, based on OFDM 12M setting ...
+	 *    ... all CCK power settings for a given channel are the *same*. */
+	if (power_changed) {
+		power =
+		    ch_info->power_info[IWL_RATE_12M_INDEX].
+		    requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
+
+		/* do all CCK rates' iwl_channel_power_info structures */
+		for (i = IWL_FIRST_CCK_RATE; i <= IWL_LAST_CCK_RATE; i++) {
+			power_info->requested_power = power;
+			power_info->base_power_index =
+			    ch_info->power_info[IWL_RATE_12M_INDEX].
+			    base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
+			++power_info;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * iwl_hw_reg_get_ch_txpower_limit - returns new power limit for channel
+ *
+ * NOTE: Returned power limit may be less (but not more) than requested,
+ *	 based strictly on regulatory (eeprom and spectrum mgt) limitations
+ *	 (no consideration for h/w clipping limitations).
+ */
+static int iwl_hw_reg_get_ch_txpower_limit(struct iwl_channel_info *ch_info)
+{
+	s8 max_power;
+
+#if 0
+	/* if we're using TGd limits, use lower of TGd or EEPROM */
+	if (ch_info->tgd_data.max_power != 0)
+		max_power = min(ch_info->tgd_data.max_power,
+				ch_info->eeprom.max_power_avg);
+
+	/* else just use EEPROM limits */
+	else
+#endif
+		max_power = ch_info->eeprom.max_power_avg;
+
+	return min(max_power, ch_info->max_power_avg);
+}
+
+/**
+ * iwl_hw_reg_comp_txpower_temp - Compensate for temperature
+ *
+ * Compensate txpower settings of *all* channels for temperature.
+ * This only accounts for the difference between current temperature
+ *   and the factory calibration temperatures, and bases the new settings
+ *   on the channel's base_power_index.
+ *
+ * If RxOn is "associated", this sends the new Txpower to NIC!
+ */
+static int iwl_hw_reg_comp_txpower_temp(struct iwl_priv *priv)
+{
+	struct iwl_channel_info *ch_info = NULL;
+	int delta_index;
+	const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
+	u8 a_band;
+	u8 rate_index;
+	u8 scan_tbl_index;
+	u8 i;
+	int ref_temp;
+	int temperature = priv->temperature;
+
+	/* set up new Tx power info for each and every channel, 2.4 and 5.x */
+	for (i = 0; i < priv->channel_count; i++) {
+		ch_info = &priv->channel_info[i];
+		a_band = is_channel_a_band(ch_info);
+
+		/* Get this chnlgrp's factory calibration temperature */
+		ref_temp = (s16)priv->eeprom.groups[ch_info->group_index].
+		    temperature;
+
+		/* get power index adjustment based on curr and factory
+		 * temps */
+		delta_index = iwl_hw_reg_adjust_power_by_temp(temperature,
+							      ref_temp);
+
+		/* set tx power value for all rates, OFDM and CCK */
+		for (rate_index = 0; rate_index < IWL_RATE_COUNT;
+		     rate_index++) {
+			int power_idx =
+			    ch_info->power_info[rate_index].base_power_index;
+
+			/* temperature compensate */
+			power_idx += delta_index;
+
+			/* stay within table range */
+			power_idx = iwl_hw_reg_fix_power_index(power_idx);
+			ch_info->power_info[rate_index].
+			    power_table_index = (u8) power_idx;
+			ch_info->power_info[rate_index].tpc =
+			    power_gain_table[a_band][power_idx];
+		}
+
+		/* Get this chnlgrp's rate-to-max/clip-powers table */
+		clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
+
+		/* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
+		for (scan_tbl_index = 0;
+		     scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
+			s32 actual_index = (scan_tbl_index == 0) ?
+			    IWL_RATE_1M_INDEX : IWL_RATE_6M_INDEX;
+			iwl_hw_reg_set_scan_power(priv, scan_tbl_index,
+					   actual_index, clip_pwrs,
+					   ch_info, a_band);
+		}
+	}
+
+	/* send Txpower command for current channel to ucode */
+	return iwl_hw_reg_send_txpower(priv);
+}
+
+int iwl_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
+{
+	struct iwl_channel_info *ch_info;
+	s8 max_power;
+	u8 a_band;
+	u8 i;
+
+	if (priv->user_txpower_limit == power) {
+		IWL_DEBUG_POWER("Requested Tx power same as current "
+				"limit: %ddBm.\n", power);
+		return 0;
+	}
+
+	IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
+	priv->user_txpower_limit = power;
+
+	/* set up new Tx powers for each and every channel, 2.4 and 5.x */
+
+	for (i = 0; i < priv->channel_count; i++) {
+		ch_info = &priv->channel_info[i];
+		a_band = is_channel_a_band(ch_info);
+
+		/* find minimum power of all user and regulatory constraints
+		 *    (does not consider h/w clipping limitations) */
+		max_power = iwl_hw_reg_get_ch_txpower_limit(ch_info);
+		max_power = min(power, max_power);
+		if (max_power != ch_info->curr_txpow) {
+			ch_info->curr_txpow = max_power;
+
+			/* this considers the h/w clipping limitations */
+			iwl_hw_reg_set_new_power(priv, ch_info);
+		}
+	}
+
+	/* update txpower settings for all channels,
+	 *   send to NIC if associated. */
+	is_temp_calib_needed(priv);
+	iwl_hw_reg_comp_txpower_temp(priv);
+
+	return 0;
+}
+
+/* will add 3945 channel switch cmd handling later */
+int iwl_hw_channel_switch(struct iwl_priv *priv, u16 channel)
+{
+	return 0;
+}
+
+/**
+ * iwl3945_reg_txpower_periodic -  called when time to check our temperature.
+ *
+ * -- reset periodic timer
+ * -- see if temp has changed enough to warrant re-calibration ... if so:
+ *     -- correct coeffs for temp (can reset temp timer)
+ *     -- save this temp as "last",
+ *     -- send new set of gain settings to NIC
+ * NOTE:  This should continue working, even when we're not associated,
+ *   so we can keep our internal table of scan powers current. */
+void iwl3945_reg_txpower_periodic(struct iwl_priv *priv)
+{
+	/* This will kick in the "brute force"
+	 * iwl_hw_reg_comp_txpower_temp() below */
+	if (!is_temp_calib_needed(priv))
+		goto reschedule;
+
+	/* Set up a new set of temp-adjusted TxPowers, send to NIC.
+	 * This is based *only* on current temperature,
+	 * ignoring any previous power measurements */
+	iwl_hw_reg_comp_txpower_temp(priv);
+
+ reschedule:
+	queue_delayed_work(priv->workqueue,
+			   &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
+}
+
+void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
+{
+	struct iwl_priv *priv = container_of(work, struct iwl_priv,
+					     thermal_periodic.work);
+
+	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+		return;
+
+	mutex_lock(&priv->mutex);
+	iwl3945_reg_txpower_periodic(priv);
+	mutex_unlock(&priv->mutex);
+}
+
+/**
+ * iwl_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
+ * 				   for the channel.
+ *
+ * This function is used when initializing channel-info structs.
+ *
+ * NOTE: These channel groups do *NOT* match the bands above!
+ *	 These channel groups are based on factory-tested channels;
+ *	 on A-band, EEPROM's "group frequency" entries represent the top
+ *	 channel in each group 1-4.  Group 5 All B/G channels are in group 0.
+ */
+static u16 iwl_hw_reg_get_ch_grp_index(struct iwl_priv *priv,
+				       const struct iwl_channel_info *ch_info)
+{
+	struct iwl_eeprom_txpower_group *ch_grp = &priv->eeprom.groups[0];
+	u8 group;
+	u16 group_index = 0;	/* based on factory calib frequencies */
+	u8 grp_channel;
+
+	/* Find the group index for the channel ... don't use index 1(?) */
+	if (is_channel_a_band(ch_info)) {
+		for (group = 1; group < 5; group++) {
+			grp_channel = ch_grp[group].group_channel;
+			if (ch_info->channel <= grp_channel) {
+				group_index = group;
+				break;
+			}
+		}
+		/* group 4 has a few channels *above* its factory cal freq */
+		if (group == 5)
+			group_index = 4;
+	} else
+		group_index = 0;	/* 2.4 GHz, group 0 */
+
+	IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
+			group_index);
+	return group_index;
+}
+
+/**
+ * iwl_hw_reg_get_matched_power_index - Interpolate to get nominal index
+ *
+ * Interpolate to get nominal (i.e. at factory calibration temperature) index
+ *   into radio/DSP gain settings table for requested power.
+ */
+static int iwl_hw_reg_get_matched_power_index(struct iwl_priv *priv,
+				       s8 requested_power,
+				       s32 setting_index, s32 *new_index)
+{
+	const struct iwl_eeprom_txpower_group *chnl_grp = NULL;
+	s32 index0, index1;
+	s32 power = 2 * requested_power;
+	s32 i;
+	const struct iwl_eeprom_txpower_sample *samples;
+	s32 gains0, gains1;
+	s32 res;
+	s32 denominator;
+
+	chnl_grp = &priv->eeprom.groups[setting_index];
+	samples = chnl_grp->samples;
+	for (i = 0; i < 5; i++) {
+		if (power == samples[i].power) {
+			*new_index = samples[i].gain_index;
+			return 0;
+		}
+	}
+
+	if (power > samples[1].power) {
+		index0 = 0;
+		index1 = 1;
+	} else if (power > samples[2].power) {
+		index0 = 1;
+		index1 = 2;
+	} else if (power > samples[3].power) {
+		index0 = 2;
+		index1 = 3;
+	} else {
+		index0 = 3;
+		index1 = 4;
+	}
+
+	denominator = (s32) samples[index1].power - (s32) samples[index0].power;
+	if (denominator == 0)
+		return -EINVAL;
+	gains0 = (s32) samples[index0].gain_index * (1 << 19);
+	gains1 = (s32) samples[index1].gain_index * (1 << 19);
+	res = gains0 + (gains1 - gains0) *
+	    ((s32) power - (s32) samples[index0].power) / denominator +
+	    (1 << 18);
+	*new_index = res >> 19;
+	return 0;
+}
+
+static void iwl_hw_reg_init_channel_groups(struct iwl_priv *priv)
+{
+	u32 i;
+	s32 rate_index;
+	const struct iwl_eeprom_txpower_group *group;
+
+	IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
+
+	for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
+		s8 *clip_pwrs;	/* table of power levels for each rate */
+		s8 satur_pwr;	/* saturation power for each chnl group */
+		group = &priv->eeprom.groups[i];
+
+		/* sanity check on factory saturation power value */
+		if (group->saturation_power < 40) {
+			IWL_WARNING("Error: saturation power is %d, "
+				    "less than minimum expected 40\n",
+				    group->saturation_power);
+			return;
+		}
+
+		/*
+		 * Derive requested power levels for each rate, based on
+		 *   hardware capabilities (saturation power for band).
+		 * Basic value is 3dB down from saturation, with further
+		 *   power reductions for highest 3 data rates.  These
+		 *   backoffs provide headroom for high rate modulation
+		 *   power peaks, without too much distortion (clipping).
+		 */
+		/* we'll fill in this array with h/w max power levels */
+		clip_pwrs = (s8 *) priv->clip_groups[i].clip_powers;
+
+		/* divide factory saturation power by 2 to find -3dB level */
+		satur_pwr = (s8) (group->saturation_power >> 1);
+
+		/* fill in channel group's nominal powers for each rate */
+		for (rate_index = 0;
+		     rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
+			switch (rate_index) {
+			case IWL_RATE_36M_INDEX:
+				if (i == 0)	/* B/G */
+					*clip_pwrs = satur_pwr;
+				else	/* A */
+					*clip_pwrs = satur_pwr - 5;
+				break;
+			case IWL_RATE_48M_INDEX:
+				if (i == 0)
+					*clip_pwrs = satur_pwr - 7;
+				else
+					*clip_pwrs = satur_pwr - 10;
+				break;
+			case IWL_RATE_54M_INDEX:
+				if (i == 0)
+					*clip_pwrs = satur_pwr - 9;
+				else
+					*clip_pwrs = satur_pwr - 12;
+				break;
+			default:
+				*clip_pwrs = satur_pwr;
+				break;
+			}
+		}
+	}
+}
+
+/**
+ * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
+ *
+ * Second pass (during init) to set up priv->channel_info
+ *
+ * Set up Tx-power settings in our channel info database for each VALID
+ * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
+ * and current temperature.
+ *
+ * Since this is based on current temperature (at init time), these values may
+ * not be valid for very long, but it gives us a starting/default point,
+ * and allows us to active (i.e. using Tx) scan.
+ *
+ * This does *not* write values to NIC, just sets up our internal table.
+ */
+int iwl3945_txpower_set_from_eeprom(struct iwl_priv *priv)
+{
+	struct iwl_channel_info *ch_info = NULL;
+	struct iwl_channel_power_info *pwr_info;
+	int delta_index;
+	u8 rate_index;
+	u8 scan_tbl_index;
+	const s8 *clip_pwrs;	/* array of power levels for each rate */
+	u8 gain, dsp_atten;
+	s8 power;
+	u8 pwr_index, base_pwr_index, a_band;
+	u8 i;
+	int temperature;
+
+	/* save temperature reference,
+	 *   so we can determine next time to calibrate */
+	temperature = iwl_hw_reg_txpower_get_temperature(priv);
+	priv->last_temperature = temperature;
+
+	iwl_hw_reg_init_channel_groups(priv);
+
+	/* initialize Tx power info for each and every channel, 2.4 and 5.x */
+	for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
+	     i++, ch_info++) {
+		a_band = is_channel_a_band(ch_info);
+		if (!is_channel_valid(ch_info))
+			continue;
+
+		/* find this channel's channel group (*not* "band") index */
+		ch_info->group_index =
+			iwl_hw_reg_get_ch_grp_index(priv, ch_info);
+
+		/* Get this chnlgrp's rate->max/clip-powers table */
+		clip_pwrs = priv->clip_groups[ch_info->group_index].clip_powers;
+
+		/* calculate power index *adjustment* value according to
+		 *  diff between current temperature and factory temperature */
+		delta_index = iwl_hw_reg_adjust_power_by_temp(temperature,
+				priv->eeprom.groups[ch_info->group_index].
+				temperature);
+
+		IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
+				ch_info->channel, delta_index, temperature +
+				IWL_TEMP_CONVERT);
+
+		/* set tx power value for all OFDM rates */
+		for (rate_index = 0; rate_index < IWL_OFDM_RATES;
+		     rate_index++) {
+			s32 power_idx;
+			int rc;
+
+			/* use channel group's clip-power table,
+			 *   but don't exceed channel's max power */
+			s8 pwr = min(ch_info->max_power_avg,
+				     clip_pwrs[rate_index]);
+
+			pwr_info = &ch_info->power_info[rate_index];
+
+			/* get base (i.e. at factory-measured temperature)
+			 *    power table index for this rate's power */
+			rc = iwl_hw_reg_get_matched_power_index(priv, pwr,
+							 ch_info->group_index,
+							 &power_idx);
+			if (rc) {
+				IWL_ERROR("Invalid power index\n");
+				return rc;
+			}
+			pwr_info->base_power_index = (u8) power_idx;
+
+			/* temperature compensate */
+			power_idx += delta_index;
+
+			/* stay within range of gain table */
+			power_idx = iwl_hw_reg_fix_power_index(power_idx);
+
+			/* fill 1 OFDM rate's iwl_channel_power_info struct */
+			pwr_info->requested_power = pwr;
+			pwr_info->power_table_index = (u8) power_idx;
+			pwr_info->tpc.tx_gain =
+			    power_gain_table[a_band][power_idx].tx_gain;
+			pwr_info->tpc.dsp_atten =
+			    power_gain_table[a_band][power_idx].dsp_atten;
+		}
+
+		/* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
+		pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX];
+		power = pwr_info->requested_power +
+			IWL_CCK_FROM_OFDM_POWER_DIFF;
+		pwr_index = pwr_info->power_table_index +
+			IWL_CCK_FROM_OFDM_INDEX_DIFF;
+		base_pwr_index = pwr_info->base_power_index +
+			IWL_CCK_FROM_OFDM_INDEX_DIFF;
+
+		/* stay within table range */
+		pwr_index = iwl_hw_reg_fix_power_index(pwr_index);
+		gain = power_gain_table[a_band][pwr_index].tx_gain;
+		dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
+
+		/* fill each CCK rate's iwl_channel_power_info structure
+		 * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
+		 * NOTE:  CCK rates start at end of OFDM rates! */
+		for (rate_index = IWL_OFDM_RATES;
+		     rate_index < IWL_RATE_COUNT; rate_index++) {
+			pwr_info = &ch_info->power_info[rate_index];
+			pwr_info->requested_power = power;
+			pwr_info->power_table_index = pwr_index;
+			pwr_info->base_power_index = base_pwr_index;
+			pwr_info->tpc.tx_gain = gain;
+			pwr_info->tpc.dsp_atten = dsp_atten;
+		}
+
+		/* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
+		for (scan_tbl_index = 0;
+		     scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
+			s32 actual_index = (scan_tbl_index == 0) ?
+				IWL_RATE_1M_INDEX : IWL_RATE_6M_INDEX;
+			iwl_hw_reg_set_scan_power(priv, scan_tbl_index,
+				actual_index, clip_pwrs, ch_info, a_band);
+		}
+	}
+
+	return 0;
+}
+
+int iwl_hw_rxq_stop(struct iwl_priv *priv)
+{
+	int rc;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return rc;
+	}
+
+	iwl_write_restricted(priv, FH_RCSR_CONFIG(0), 0);
+	rc = iwl_poll_restricted_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
+	if (rc < 0)
+		IWL_ERROR("Can't stop Rx DMA.\n");
+
+	iwl_release_restricted_access(priv);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+int iwl_hw_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq)
+{
+	int rc;
+	unsigned long flags;
+	int txq_id = txq->q.id;
+
+	struct iwl_shared *shared_data = priv->hw_setting.shared_virt;
+
+	shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	rc = iwl_grab_restricted_access(priv);
+	if (rc) {
+		spin_unlock_irqrestore(&priv->lock, flags);
+		return rc;
+	}
+	iwl_write_restricted(priv, FH_CBCC_CTRL(txq_id), 0);
+	iwl_write_restricted(priv, FH_CBCC_BASE(txq_id), 0);
+
+	iwl_write_restricted(priv, FH_TCSR_CONFIG(txq_id),
+		ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
+		ALM_FH_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
+		ALM_FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
+		ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
+		ALM_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
+	iwl_release_restricted_access(priv);
+
+	/* fake read to flush all prev. writes */
+	iwl_read32(priv, FH_TSSR_CBB_BASE);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+int iwl_hw_get_rx_read(struct iwl_priv *priv)
+{
+	struct iwl_shared *shared_data = priv->hw_setting.shared_virt;
+
+	return le32_to_cpu(shared_data->rx_read_ptr[0]);
+}
+
+/**
+ * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
+ */
+int iwl3945_init_hw_rate_table(struct iwl_priv *priv)
+{
+	int rc, i;
+	struct iwl_rate_scaling_cmd rate_cmd = {
+		.reserved = {0, 0, 0},
+	};
+	struct iwl_rate_scaling_info *table = rate_cmd.table;
+
+	for (i = 0; i < ARRAY_SIZE(iwl_rates); i++) {
+		table[i].rate_n_flags =
+			iwl_hw_set_rate_n_flags(iwl_rates[i].plcp, 0);
+		table[i].try_cnt = priv->retry_rate;
+		table[i].next_rate_index = iwl_get_prev_ieee_rate(i);
+	}
+
+	switch (priv->phymode) {
+	case MODE_IEEE80211A:
+		IWL_DEBUG_RATE("Select A mode rate scale\n");
+		/* If one of the following CCK rates is used,
+		 * have it fall back to the 6M OFDM rate */
+		for (i = IWL_FIRST_CCK_RATE; i <= IWL_LAST_CCK_RATE; i++)
+			table[i].next_rate_index = IWL_FIRST_OFDM_RATE;
+
+		/* Don't fall back to CCK rates */
+		table[IWL_RATE_12M_INDEX].next_rate_index = IWL_RATE_9M_INDEX;
+
+		/* Don't drop out of OFDM rates */
+		table[IWL_FIRST_OFDM_RATE].next_rate_index =
+		    IWL_FIRST_OFDM_RATE;
+		break;
+
+	case MODE_IEEE80211B:
+		IWL_DEBUG_RATE("Select B mode rate scale\n");
+		/* If an OFDM rate is used, have it fall back to the
+		 * 1M CCK rates */
+		for (i = IWL_FIRST_OFDM_RATE; i <= IWL_LAST_OFDM_RATE; i++)
+			table[i].next_rate_index = IWL_FIRST_CCK_RATE;
+
+		/* CCK shouldn't fall back to OFDM... */
+		table[IWL_RATE_11M_INDEX].next_rate_index = IWL_RATE_5M_INDEX;
+		break;
+
+	default:
+		IWL_DEBUG_RATE("Select G mode rate scale\n");
+		break;
+	}
+
+	/* Update the rate scaling for control frame Tx */
+	rate_cmd.table_id = 0;
+	rc = iwl_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
+			      &rate_cmd);
+	if (rc)
+		return rc;
+
+	/* Update the rate scaling for data frame Tx */
+	rate_cmd.table_id = 1;
+	return iwl_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
+				&rate_cmd);
+}
+
+int iwl_hw_set_hw_setting(struct iwl_priv *priv)
+{
+	memset((void *)&priv->hw_setting, 0,
+	       sizeof(struct iwl_driver_hw_info));
+
+	priv->hw_setting.shared_virt =
+	    pci_alloc_consistent(priv->pci_dev,
+				 sizeof(struct iwl_shared),
+				 &priv->hw_setting.shared_phys);
+
+	if (!priv->hw_setting.shared_virt) {
+		IWL_ERROR("failed to allocate pci memory\n");
+		mutex_unlock(&priv->mutex);
+		return -ENOMEM;
+	}
+
+	priv->hw_setting.ac_queue_count = AC_NUM;
+	priv->hw_setting.rx_buffer_size = IWL_RX_BUF_SIZE;
+	priv->hw_setting.tx_cmd_len = sizeof(struct iwl_tx_cmd);
+	priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
+	priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
+	priv->hw_setting.cck_flag = 0;
+	priv->hw_setting.max_stations = IWL3945_STATION_COUNT;
+	priv->hw_setting.bcast_sta_id = IWL3945_BROADCAST_ID;
+	return 0;
+}
+
+unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
+			  struct iwl_frame *frame, u8 rate)
+{
+	struct iwl_tx_beacon_cmd *tx_beacon_cmd;
+	unsigned int frame_size;
+
+	tx_beacon_cmd = (struct iwl_tx_beacon_cmd *)&frame->u;
+	memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
+
+	tx_beacon_cmd->tx.sta_id = IWL3945_BROADCAST_ID;
+	tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
+
+	frame_size = iwl_fill_beacon_frame(priv,
+				tx_beacon_cmd->frame,
+				BROADCAST_ADDR,
+				sizeof(frame->u) - sizeof(*tx_beacon_cmd));
+
+	BUG_ON(frame_size > MAX_MPDU_SIZE);
+	tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
+
+	tx_beacon_cmd->tx.rate = rate;
+	tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
+				      TX_CMD_FLG_TSF_MSK);
+
+	/* supp_rates[0] == OFDM  */
+	tx_beacon_cmd->tx.supp_rates[0] = IWL_OFDM_BASIC_RATES_MASK;
+
+	/* supp_rates[1] == CCK
+	 *
+	 * NOTE:  IWL_*_RATES_MASK are not in the order that supp_rates
+	 * expects so we have to shift them around.
+	 *
+	 * supp_rates expects:
+	 * CCK rates are bit0..3
+	 *
+	 * However IWL_*_RATES_MASK has:
+	 * CCK rates are bit8..11
+	 */
+	tx_beacon_cmd->tx.supp_rates[1] =
+		(IWL_CCK_BASIC_RATES_MASK >> 8) & 0xF;
+
+	return (sizeof(struct iwl_tx_beacon_cmd) + frame_size);
+}
+
+void iwl_hw_rx_handler_setup(struct iwl_priv *priv)
+{
+	priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
+}
+
+void iwl_hw_setup_deferred_work(struct iwl_priv *priv)
+{
+	INIT_DELAYED_WORK(&priv->thermal_periodic,
+			  iwl3945_bg_reg_txpower_periodic);
+}
+
+void iwl_hw_cancel_deferred_work(struct iwl_priv *priv)
+{
+	cancel_delayed_work(&priv->thermal_periodic);
+}
+
+struct pci_device_id iwl_hw_card_ids[] = {
+	{0x8086, 0x4222, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{0x8086, 0x4227, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{0}
+};
+
+inline int iwl_eeprom_aqcuire_semaphore(struct iwl_priv *priv)
+{
+	_iwl_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
+	return 0;
+}
+
+MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);