--- /dev/null
+/*
+ * Atheros AR9170 driver
+ *
+ * mac80211 interaction code
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009, Christian Lamparter <chunkeey@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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; see the file COPYING. If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ * Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ * Permission to use, copy, modify, and/or 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.
+ */
+
+/*
+ * BIG FAT TODO:
+ *
+ * By the looks of things: these devices share a lot of things like
+ * EEPROM layout/design and PHY code with other Atheros WIFI products.
+ * So this driver/library will eventually become ath9k code... or vice versa ;-)
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/etherdevice.h>
+#include <net/mac80211.h>
+#include "ar9170.h"
+#include "hw.h"
+#include "cmd.h"
+
+static int modparam_nohwcrypt;
+module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
+MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
+MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Atheros shared code for AR9170 wireless devices");
+
+#define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
+ .bitrate = (_bitrate), \
+ .flags = (_flags), \
+ .hw_value = (_hw_rate) | (_txpidx) << 4, \
+}
+
+static struct ieee80211_rate __ar9170_ratetable[] = {
+ RATE(10, 0, 0, 0),
+ RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
+ RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
+ RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
+ RATE(60, 0xb, 0, 0),
+ RATE(90, 0xf, 0, 0),
+ RATE(120, 0xa, 0, 0),
+ RATE(180, 0xe, 0, 0),
+ RATE(240, 0x9, 0, 0),
+ RATE(360, 0xd, 1, 0),
+ RATE(480, 0x8, 2, 0),
+ RATE(540, 0xc, 3, 0),
+};
+#undef RATE
+
+#define ar9170_g_ratetable (__ar9170_ratetable + 0)
+#define ar9170_g_ratetable_size 12
+#define ar9170_a_ratetable (__ar9170_ratetable + 4)
+#define ar9170_a_ratetable_size 8
+
+/*
+ * NB: The hw_value is used as an index into the ar9170_phy_freq_params
+ * array in phy.c so that we don't have to do frequency lookups!
+ */
+#define CHAN(_freq, _idx) { \
+ .center_freq = (_freq), \
+ .hw_value = (_idx), \
+ .max_power = 18, /* XXX */ \
+}
+
+static struct ieee80211_channel ar9170_2ghz_chantable[] = {
+ CHAN(2412, 0),
+ CHAN(2417, 1),
+ CHAN(2422, 2),
+ CHAN(2427, 3),
+ CHAN(2432, 4),
+ CHAN(2437, 5),
+ CHAN(2442, 6),
+ CHAN(2447, 7),
+ CHAN(2452, 8),
+ CHAN(2457, 9),
+ CHAN(2462, 10),
+ CHAN(2467, 11),
+ CHAN(2472, 12),
+ CHAN(2484, 13),
+};
+
+static struct ieee80211_channel ar9170_5ghz_chantable[] = {
+ CHAN(4920, 14),
+ CHAN(4940, 15),
+ CHAN(4960, 16),
+ CHAN(4980, 17),
+ CHAN(5040, 18),
+ CHAN(5060, 19),
+ CHAN(5080, 20),
+ CHAN(5180, 21),
+ CHAN(5200, 22),
+ CHAN(5220, 23),
+ CHAN(5240, 24),
+ CHAN(5260, 25),
+ CHAN(5280, 26),
+ CHAN(5300, 27),
+ CHAN(5320, 28),
+ CHAN(5500, 29),
+ CHAN(5520, 30),
+ CHAN(5540, 31),
+ CHAN(5560, 32),
+ CHAN(5580, 33),
+ CHAN(5600, 34),
+ CHAN(5620, 35),
+ CHAN(5640, 36),
+ CHAN(5660, 37),
+ CHAN(5680, 38),
+ CHAN(5700, 39),
+ CHAN(5745, 40),
+ CHAN(5765, 41),
+ CHAN(5785, 42),
+ CHAN(5805, 43),
+ CHAN(5825, 44),
+ CHAN(5170, 45),
+ CHAN(5190, 46),
+ CHAN(5210, 47),
+ CHAN(5230, 48),
+};
+#undef CHAN
+
+static struct ieee80211_supported_band ar9170_band_2GHz = {
+ .channels = ar9170_2ghz_chantable,
+ .n_channels = ARRAY_SIZE(ar9170_2ghz_chantable),
+ .bitrates = ar9170_g_ratetable,
+ .n_bitrates = ar9170_g_ratetable_size,
+};
+
+#ifdef AR9170_QUEUE_DEBUG
+/*
+ * In case some wants works with AR9170's crazy tx_status queueing techniques.
+ * He might need this rather useful probing function.
+ *
+ * NOTE: caller must hold the queue's spinlock!
+ */
+
+static void ar9170_print_txheader(struct ar9170 *ar, struct sk_buff *skb)
+{
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ struct ieee80211_hdr *hdr = (void *)txc->frame_data;
+
+ printk(KERN_DEBUG "%s: => FRAME [skb:%p, queue:%d, DA:[%pM] "
+ "mac_control:%04x, phy_control:%08x]\n",
+ wiphy_name(ar->hw->wiphy), skb, skb_get_queue_mapping(skb),
+ ieee80211_get_DA(hdr), le16_to_cpu(txc->mac_control),
+ le32_to_cpu(txc->phy_control));
+}
+
+static void ar9170_dump_station_tx_status_queue(struct ar9170 *ar,
+ struct sk_buff_head *queue)
+{
+ struct sk_buff *skb;
+ int i = 0;
+
+ printk(KERN_DEBUG "---[ cut here ]---\n");
+ printk(KERN_DEBUG "%s: %d entries in tx_status queue.\n",
+ wiphy_name(ar->hw->wiphy), skb_queue_len(queue));
+
+ skb_queue_walk(queue, skb) {
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ struct ieee80211_hdr *hdr = (void *)txc->frame_data;
+
+ printk(KERN_DEBUG "index:%d => \n", i);
+ ar9170_print_txheader(ar, skb);
+ }
+ printk(KERN_DEBUG "---[ end ]---\n");
+}
+#endif /* AR9170_QUEUE_DEBUG */
+
+static struct ieee80211_supported_band ar9170_band_5GHz = {
+ .channels = ar9170_5ghz_chantable,
+ .n_channels = ARRAY_SIZE(ar9170_5ghz_chantable),
+ .bitrates = ar9170_a_ratetable,
+ .n_bitrates = ar9170_a_ratetable_size,
+};
+
+void ar9170_handle_tx_status(struct ar9170 *ar, struct sk_buff *skb,
+ bool valid_status, u16 tx_status)
+{
+ struct ieee80211_tx_info *txinfo;
+ unsigned int retries = 0, queue = skb_get_queue_mapping(skb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ ar->tx_stats[queue].len--;
+ if (ieee80211_queue_stopped(ar->hw, queue))
+ ieee80211_wake_queue(ar->hw, queue);
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+ txinfo = IEEE80211_SKB_CB(skb);
+ ieee80211_tx_info_clear_status(txinfo);
+
+ switch (tx_status) {
+ case AR9170_TX_STATUS_RETRY:
+ retries = 2;
+ case AR9170_TX_STATUS_COMPLETE:
+ txinfo->flags |= IEEE80211_TX_STAT_ACK;
+ break;
+
+ case AR9170_TX_STATUS_FAILED:
+ retries = ar->hw->conf.long_frame_max_tx_count;
+ break;
+
+ default:
+ printk(KERN_ERR "%s: invalid tx_status response (%x).\n",
+ wiphy_name(ar->hw->wiphy), tx_status);
+ break;
+ }
+
+ if (valid_status)
+ txinfo->status.rates[0].count = retries + 1;
+
+ skb_pull(skb, sizeof(struct ar9170_tx_control));
+ ieee80211_tx_status_irqsafe(ar->hw, skb);
+}
+EXPORT_SYMBOL_GPL(ar9170_handle_tx_status);
+
+static struct sk_buff *ar9170_find_skb_in_queue(struct ar9170 *ar,
+ const u8 *mac,
+ const u32 queue,
+ struct sk_buff_head *q)
+{
+ unsigned long flags;
+ struct sk_buff *skb;
+
+ spin_lock_irqsave(&q->lock, flags);
+ skb_queue_walk(q, skb) {
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ struct ieee80211_hdr *hdr = (void *) txc->frame_data;
+ u32 txc_queue = (le32_to_cpu(txc->phy_control) &
+ AR9170_TX_PHY_QOS_MASK) >>
+ AR9170_TX_PHY_QOS_SHIFT;
+
+ if ((queue != txc_queue) ||
+ (compare_ether_addr(ieee80211_get_DA(hdr), mac)))
+ continue;
+
+ __skb_unlink(skb, q);
+ spin_unlock_irqrestore(&q->lock, flags);
+ return skb;
+ }
+ spin_unlock_irqrestore(&q->lock, flags);
+ return NULL;
+}
+
+static struct sk_buff *ar9170_find_skb_in_queue_by_mac(struct ar9170 *ar,
+ const u8 *mac,
+ struct sk_buff_head *q)
+{
+ unsigned long flags;
+ struct sk_buff *skb;
+
+ spin_lock_irqsave(&q->lock, flags);
+ skb_queue_walk(q, skb) {
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ struct ieee80211_hdr *hdr = (void *) txc->frame_data;
+
+ if (compare_ether_addr(ieee80211_get_DA(hdr), mac))
+ continue;
+
+ __skb_unlink(skb, q);
+ spin_unlock_irqrestore(&q->lock, flags);
+ return skb;
+ }
+ spin_unlock_irqrestore(&q->lock, flags);
+ return NULL;
+}
+
+static struct sk_buff *ar9170_find_skb_in_queue_by_txcq(struct ar9170 *ar,
+ const u32 queue,
+ struct sk_buff_head *q)
+{
+ unsigned long flags;
+ struct sk_buff *skb;
+
+ spin_lock_irqsave(&q->lock, flags);
+ skb_queue_walk(q, skb) {
+ struct ar9170_tx_control *txc = (void *) skb->data;
+ u32 txc_queue = (le32_to_cpu(txc->phy_control) &
+ AR9170_TX_PHY_QOS_MASK) >>
+ AR9170_TX_PHY_QOS_SHIFT;
+
+ if (queue != txc_queue)
+ continue;
+
+ __skb_unlink(skb, q);
+ spin_unlock_irqrestore(&q->lock, flags);
+ return skb;
+ }
+ spin_unlock_irqrestore(&q->lock, flags);
+ return NULL;
+}
+
+static struct sk_buff *ar9170_find_queued_skb(struct ar9170 *ar, const u8 *mac,
+ const u32 queue)
+{
+ struct ieee80211_sta *sta;
+ struct sk_buff *skb;
+
+ /*
+ * Unfortunately, the firmware does not tell to which (queued) frame
+ * this transmission status report belongs to.
+ *
+ * So we have to make risky guesses - with the scarce information
+ * the firmware provided (-> destination MAC, and phy_control) -
+ * and hope that we picked the right one...
+ */
+ rcu_read_lock();
+ sta = ieee80211_find_sta(ar->hw, mac);
+
+ if (likely(sta)) {
+ struct ar9170_sta_info *sta_priv = (void *) sta->drv_priv;
+ skb = ar9170_find_skb_in_queue_by_txcq(ar, queue,
+ &sta_priv->tx_status);
+ } else {
+ /* STA is not in database (yet/anymore). */
+
+ /* scan the waste bin for likely candidates */
+ skb = ar9170_find_skb_in_queue(ar, mac, queue,
+ &ar->global_tx_status_waste);
+ if (!skb) {
+ /* so it still _must_ be in the global list. */
+ skb = ar9170_find_skb_in_queue(ar, mac, queue,
+ &ar->global_tx_status);
+ }
+ }
+ rcu_read_unlock();
+
+#ifdef AR9170_QUEUE_DEBUG
+ if (unlikely((!skb) && net_ratelimit())) {
+ printk(KERN_ERR "%s: ESS:[%pM] does not have any "
+ "outstanding frames in this queue (%d).\n",
+ wiphy_name(ar->hw->wiphy), mac, queue);
+ }
+#endif /* AR9170_QUEUE_DEBUG */
+
+ return skb;
+}
+
+/*
+ * This worker tries to keep the global tx_status queue empty.
+ * So we can guarantee that incoming tx_status reports for
+ * unregistered stations are always synced with the actual
+ * frame - which we think - belongs to.
+ */
+
+static void ar9170_tx_status_janitor(struct work_struct *work)
+{
+ struct ar9170 *ar = container_of(work, struct ar9170,
+ filter_config_work);
+ struct sk_buff *skb;
+
+ /* recycle the garbage back to mac80211... one by one. */
+ while ((skb = skb_dequeue(&ar->global_tx_status_waste))) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: dispose queued frame =>\n",
+ wiphy_name(ar->hw->wiphy));
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ ar9170_handle_tx_status(ar, skb, false,
+ AR9170_TX_STATUS_FAILED);
+ }
+
+
+
+ while ((skb = skb_dequeue(&ar->global_tx_status))) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: moving frame into waste queue =>\n",
+ wiphy_name(ar->hw->wiphy));
+
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ skb_queue_tail(&ar->global_tx_status_waste, skb);
+ }
+
+ /* recall the janitor in 100ms - if there's garbage in the can. */
+ if (skb_queue_len(&ar->global_tx_status_waste) > 0)
+ queue_delayed_work(ar->hw->workqueue, &ar->tx_status_janitor,
+ msecs_to_jiffies(100));
+}
+
+static void ar9170_handle_command_response(struct ar9170 *ar,
+ void *buf, u32 len)
+{
+ struct ar9170_cmd_response *cmd = (void *) buf;
+
+ if ((cmd->type & 0xc0) != 0xc0) {
+ ar->callback_cmd(ar, len, buf);
+ return;
+ }
+
+ /* hardware event handlers */
+ switch (cmd->type) {
+ case 0xc1: {
+ /*
+ * TX status notification:
+ * bytes: 0c c1 XX YY M1 M2 M3 M4 M5 M6 R4 R3 R2 R1 S2 S1
+ *
+ * XX always 81
+ * YY always 00
+ * M1-M6 is the MAC address
+ * R1-R4 is the transmit rate
+ * S1-S2 is the transmit status
+ */
+
+ struct sk_buff *skb;
+ u32 queue = (le32_to_cpu(cmd->tx_status.rate) &
+ AR9170_TX_PHY_QOS_MASK) >> AR9170_TX_PHY_QOS_SHIFT;
+
+ skb = ar9170_find_queued_skb(ar, cmd->tx_status.dst, queue);
+ if (unlikely(!skb))
+ return ;
+
+ ar9170_handle_tx_status(ar, skb, true,
+ le16_to_cpu(cmd->tx_status.status));
+ break;
+ }
+
+ case 0xc0:
+ /*
+ * pre-TBTT event
+ */
+ if (ar->vif && ar->vif->type == NL80211_IFTYPE_AP)
+ queue_work(ar->hw->workqueue, &ar->beacon_work);
+ break;
+
+ case 0xc2:
+ /*
+ * (IBSS) beacon send notification
+ * bytes: 04 c2 XX YY B4 B3 B2 B1
+ *
+ * XX always 80
+ * YY always 00
+ * B1-B4 "should" be the number of send out beacons.
+ */
+ break;
+
+ case 0xc3:
+ /* End of Atim Window */
+ break;
+
+ case 0xc4:
+ case 0xc5:
+ /* BlockACK events */
+ break;
+
+ case 0xc6:
+ /* Watchdog Interrupt */
+ break;
+
+ case 0xc9:
+ /* retransmission issue / SIFS/EIFS collision ?! */
+ break;
+
+ default:
+ printk(KERN_INFO "received unhandled event %x\n", cmd->type);
+ print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len);
+ break;
+ }
+}
+
+/*
+ * If the frame alignment is right (or the kernel has
+ * CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS), and there
+ * is only a single MPDU in the USB frame, then we can
+ * submit to mac80211 the SKB directly. However, since
+ * there may be multiple packets in one SKB in stream
+ * mode, and we need to observe the proper ordering,
+ * this is non-trivial.
+ */
+static void ar9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len)
+{
+ struct sk_buff *skb;
+ struct ar9170_rx_head *head = (void *)buf;
+ struct ar9170_rx_tail *tail;
+ struct ieee80211_rx_status status;
+ int mpdu_len, i;
+ u8 error, antennas = 0, decrypt;
+ __le16 fc;
+ int reserved;
+
+ if (unlikely(!IS_STARTED(ar)))
+ return ;
+
+ /* Received MPDU */
+ mpdu_len = len;
+ mpdu_len -= sizeof(struct ar9170_rx_head);
+ mpdu_len -= sizeof(struct ar9170_rx_tail);
+ BUILD_BUG_ON(sizeof(struct ar9170_rx_head) != 12);
+ BUILD_BUG_ON(sizeof(struct ar9170_rx_tail) != 24);
+
+ if (mpdu_len <= FCS_LEN)
+ return;
+
+ tail = (void *)(buf + sizeof(struct ar9170_rx_head) + mpdu_len);
+
+ for (i = 0; i < 3; i++)
+ if (tail->rssi[i] != 0x80)
+ antennas |= BIT(i);
+
+ /* post-process RSSI */
+ for (i = 0; i < 7; i++)
+ if (tail->rssi[i] & 0x80)
+ tail->rssi[i] = ((tail->rssi[i] & 0x7f) + 1) & 0x7f;
+
+ memset(&status, 0, sizeof(status));
+
+ status.band = ar->channel->band;
+ status.freq = ar->channel->center_freq;
+ status.signal = ar->noise[0] + tail->rssi_combined;
+ status.noise = ar->noise[0];
+ status.antenna = antennas;
+
+ switch (tail->status & AR9170_RX_STATUS_MODULATION_MASK) {
+ case AR9170_RX_STATUS_MODULATION_CCK:
+ if (tail->status & AR9170_RX_STATUS_SHORT_PREAMBLE)
+ status.flag |= RX_FLAG_SHORTPRE;
+ switch (head->plcp[0]) {
+ case 0x0a:
+ status.rate_idx = 0;
+ break;
+ case 0x14:
+ status.rate_idx = 1;
+ break;
+ case 0x37:
+ status.rate_idx = 2;
+ break;
+ case 0x6e:
+ status.rate_idx = 3;
+ break;
+ default:
+ if ((!ar->sniffer_enabled) && (net_ratelimit()))
+ printk(KERN_ERR "%s: invalid plcp cck rate "
+ "(%x).\n", wiphy_name(ar->hw->wiphy),
+ head->plcp[0]);
+ return;
+ }
+ break;
+ case AR9170_RX_STATUS_MODULATION_OFDM:
+ switch (head->plcp[0] & 0xF) {
+ case 0xB:
+ status.rate_idx = 0;
+ break;
+ case 0xF:
+ status.rate_idx = 1;
+ break;
+ case 0xA:
+ status.rate_idx = 2;
+ break;
+ case 0xE:
+ status.rate_idx = 3;
+ break;
+ case 0x9:
+ status.rate_idx = 4;
+ break;
+ case 0xD:
+ status.rate_idx = 5;
+ break;
+ case 0x8:
+ status.rate_idx = 6;
+ break;
+ case 0xC:
+ status.rate_idx = 7;
+ break;
+ default:
+ if ((!ar->sniffer_enabled) && (net_ratelimit()))
+ printk(KERN_ERR "%s: invalid plcp ofdm rate "
+ "(%x).\n", wiphy_name(ar->hw->wiphy),
+ head->plcp[0]);
+ return;
+ }
+ if (status.band == IEEE80211_BAND_2GHZ)
+ status.rate_idx += 4;
+ break;
+ case AR9170_RX_STATUS_MODULATION_HT:
+ case AR9170_RX_STATUS_MODULATION_DUPOFDM:
+ /* XXX */
+
+ if (net_ratelimit())
+ printk(KERN_ERR "%s: invalid modulation\n",
+ wiphy_name(ar->hw->wiphy));
+ return;
+ }
+
+ error = tail->error;
+
+ if (error & AR9170_RX_ERROR_MMIC) {
+ status.flag |= RX_FLAG_MMIC_ERROR;
+ error &= ~AR9170_RX_ERROR_MMIC;
+ }
+
+ if (error & AR9170_RX_ERROR_PLCP) {
+ status.flag |= RX_FLAG_FAILED_PLCP_CRC;
+ error &= ~AR9170_RX_ERROR_PLCP;
+ }
+
+ if (error & AR9170_RX_ERROR_FCS) {
+ status.flag |= RX_FLAG_FAILED_FCS_CRC;
+ error &= ~AR9170_RX_ERROR_FCS;
+ }
+
+ decrypt = ar9170_get_decrypt_type(tail);
+ if (!(decrypt & AR9170_RX_ENC_SOFTWARE) &&
+ decrypt != AR9170_ENC_ALG_NONE)
+ status.flag |= RX_FLAG_DECRYPTED;
+
+ /* ignore wrong RA errors */
+ error &= ~AR9170_RX_ERROR_WRONG_RA;
+
+ if (error & AR9170_RX_ERROR_DECRYPT) {
+ error &= ~AR9170_RX_ERROR_DECRYPT;
+
+ /*
+ * Rx decryption is done in place,
+ * the original data is lost anyway.
+ */
+ return ;
+ }
+
+ /* drop any other error frames */
+ if ((error) && (net_ratelimit())) {
+ printk(KERN_DEBUG "%s: errors: %#x\n",
+ wiphy_name(ar->hw->wiphy), error);
+ return;
+ }
+
+ buf += sizeof(struct ar9170_rx_head);
+ fc = *(__le16 *)buf;
+
+ if (ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc))
+ reserved = 32 + 2;
+ else
+ reserved = 32;
+
+ skb = dev_alloc_skb(mpdu_len + reserved);
+ if (!skb)
+ return;
+
+ skb_reserve(skb, reserved);
+ memcpy(skb_put(skb, mpdu_len), buf, mpdu_len);
+ ieee80211_rx_irqsafe(ar->hw, skb, &status);
+}
+
+/*
+ * TODO:
+ * It looks like AR9170 supports more than just the USB transport interface.
+ * Unfortunately, there is no available information what parts of the
+ * precendent and following code fragments is device specific and what not.
+ * For now, everything stays here, until some SPI chips pop up.
+ */
+void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb)
+{
+ unsigned int i, tlen, resplen;
+ u8 *tbuf, *respbuf;
+
+ tbuf = skb->data;
+ tlen = skb->len;
+
+ while (tlen >= 4) {
+ int clen = tbuf[1] << 8 | tbuf[0];
+ int wlen = (clen + 3) & ~3;
+
+ /*
+ * parse stream (if any)
+ */
+ if (tbuf[2] != 0 || tbuf[3] != 0x4e) {
+ printk(KERN_ERR "%s: missing tag!\n",
+ wiphy_name(ar->hw->wiphy));
+ return ;
+ }
+ if (wlen > tlen - 4) {
+ printk(KERN_ERR "%s: invalid RX (%d, %d, %d)\n",
+ wiphy_name(ar->hw->wiphy), clen, wlen, tlen);
+ print_hex_dump(KERN_DEBUG, "data: ",
+ DUMP_PREFIX_OFFSET,
+ 16, 1, tbuf, tlen, true);
+ return ;
+ }
+ resplen = clen;
+ respbuf = tbuf + 4;
+ tbuf += wlen + 4;
+ tlen -= wlen + 4;
+
+ i = 0;
+
+ /* weird thing, but this is the same in the original driver */
+ while (resplen > 2 && i < 12 &&
+ respbuf[0] == 0xff && respbuf[1] == 0xff) {
+ i += 2;
+ resplen -= 2;
+ respbuf += 2;
+ }
+
+ if (resplen < 4)
+ continue;
+
+ /* found the 6 * 0xffff marker? */
+ if (i == 12)
+ ar9170_handle_command_response(ar, respbuf, resplen);
+ else
+ ar9170_handle_mpdu(ar, respbuf, resplen);
+ }
+
+ if (tlen)
+ printk(KERN_ERR "%s: buffer remains!\n",
+ wiphy_name(ar->hw->wiphy));
+}
+EXPORT_SYMBOL_GPL(ar9170_rx);
+
+#define AR9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
+do { \
+ queue.aifs = ai_fs; \
+ queue.cw_min = cwmin; \
+ queue.cw_max = cwmax; \
+ queue.txop = _txop; \
+} while (0)
+
+static int ar9170_op_start(struct ieee80211_hw *hw)
+{
+ struct ar9170 *ar = hw->priv;
+ int err, i;
+
+ mutex_lock(&ar->mutex);
+
+ /* reinitialize queues statistics */
+ memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
+ for (i = 0; i < ARRAY_SIZE(ar->tx_stats); i++)
+ ar->tx_stats[i].limit = 8;
+
+ /* reset QoS defaults */
+ AR9170_FILL_QUEUE(ar->edcf[0], 3, 15, 1023, 0); /* BEST EFFORT*/
+ AR9170_FILL_QUEUE(ar->edcf[1], 7, 15, 1023, 0); /* BACKGROUND */
+ AR9170_FILL_QUEUE(ar->edcf[2], 2, 7, 15, 94); /* VIDEO */
+ AR9170_FILL_QUEUE(ar->edcf[3], 2, 3, 7, 47); /* VOICE */
+ AR9170_FILL_QUEUE(ar->edcf[4], 2, 3, 7, 0); /* SPECIAL */
+
+ err = ar->open(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_init_mac(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_set_qos(ar);
+ if (err)
+ goto out;
+
+ err = ar9170_init_phy(ar, IEEE80211_BAND_2GHZ);
+ if (err)
+ goto out;
+
+ err = ar9170_init_rf(ar);
+ if (err)
+ goto out;
+
+ /* start DMA */
+ err = ar9170_write_reg(ar, 0x1c3d30, 0x100);
+ if (err)
+ goto out;
+
+ ar->state = AR9170_STARTED;
+
+out:
+ mutex_unlock(&ar->mutex);
+ return err;
+}
+
+static void ar9170_op_stop(struct ieee80211_hw *hw)
+{
+ struct ar9170 *ar = hw->priv;
+
+ if (IS_STARTED(ar))
+ ar->state = AR9170_IDLE;
+
+ mutex_lock(&ar->mutex);
+
+ cancel_delayed_work_sync(&ar->tx_status_janitor);
+ cancel_work_sync(&ar->filter_config_work);
+ cancel_work_sync(&ar->beacon_work);
+ skb_queue_purge(&ar->global_tx_status_waste);
+ skb_queue_purge(&ar->global_tx_status);
+
+ if (IS_ACCEPTING_CMD(ar)) {
+ ar9170_set_leds_state(ar, 0);
+
+ /* stop DMA */
+ ar9170_write_reg(ar, 0x1c3d30, 0);
+ ar->stop(ar);
+ }
+
+ mutex_unlock(&ar->mutex);
+}
+
+int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct ar9170 *ar = hw->priv;
+ struct ieee80211_hdr *hdr;
+ struct ar9170_tx_control *txc;
+ struct ieee80211_tx_info *info;
+ struct ieee80211_rate *rate = NULL;
+ struct ieee80211_tx_rate *txrate;
+ unsigned int queue = skb_get_queue_mapping(skb);
+ unsigned long flags = 0;
+ struct ar9170_sta_info *sta_info = NULL;
+ u32 power, chains;
+ u16 keytype = 0;
+ u16 len, icv = 0;
+ int err;
+ bool tx_status;
+
+ if (unlikely(!IS_STARTED(ar)))
+ goto err_free;
+
+ hdr = (void *)skb->data;
+ info = IEEE80211_SKB_CB(skb);
+ len = skb->len;
+
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ if (ar->tx_stats[queue].limit < ar->tx_stats[queue].len) {
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+ return NETDEV_TX_OK;
+ }
+
+ ar->tx_stats[queue].len++;
+ ar->tx_stats[queue].count++;
+ if (ar->tx_stats[queue].limit == ar->tx_stats[queue].len)
+ ieee80211_stop_queue(hw, queue);
+
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+ txc = (void *)skb_push(skb, sizeof(*txc));
+
+ tx_status = (((info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) != 0) ||
+ ((info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) != 0));
+
+ if (info->control.hw_key) {
+ icv = info->control.hw_key->icv_len;
+
+ switch (info->control.hw_key->alg) {
+ case ALG_WEP:
+ keytype = AR9170_TX_MAC_ENCR_RC4;
+ break;
+ case ALG_TKIP:
+ keytype = AR9170_TX_MAC_ENCR_RC4;
+ break;
+ case ALG_CCMP:
+ keytype = AR9170_TX_MAC_ENCR_AES;
+ break;
+ default:
+ WARN_ON(1);
+ goto err_dequeue;
+ }
+ }
+
+ /* Length */
+ txc->length = cpu_to_le16(len + icv + 4);
+
+ txc->mac_control = cpu_to_le16(AR9170_TX_MAC_HW_DURATION |
+ AR9170_TX_MAC_BACKOFF);
+ txc->mac_control |= cpu_to_le16(ar9170_qos_hwmap[queue] <<
+ AR9170_TX_MAC_QOS_SHIFT);
+ txc->mac_control |= cpu_to_le16(keytype);
+ txc->phy_control = cpu_to_le32(0);
+
+ if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_NO_ACK);
+
+ if (info->flags & IEEE80211_TX_CTL_AMPDU)
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_AGGR);
+
+ txrate = &info->control.rates[0];
+
+ if (txrate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_CTS);
+ else if (txrate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_PROT_RTS);
+
+ if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_GREENFIELD);
+
+ if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_PREAMBLE);
+
+ if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ);
+ /* this works because 40 MHz is 2 and dup is 3 */
+ if (txrate->flags & IEEE80211_TX_RC_DUP_DATA)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_BW_40MHZ_DUP);
+
+ if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_SHORT_GI);
+
+ if (txrate->flags & IEEE80211_TX_RC_MCS) {
+ u32 r = txrate->idx;
+ u8 *txpower;
+
+ r <<= AR9170_TX_PHY_MCS_SHIFT;
+ if (WARN_ON(r & ~AR9170_TX_PHY_MCS_MASK))
+ goto err_dequeue;
+ txc->phy_control |= cpu_to_le32(r & AR9170_TX_PHY_MCS_MASK);
+ txc->phy_control |= cpu_to_le32(AR9170_TX_PHY_MOD_HT);
+
+ if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) {
+ if (info->band == IEEE80211_BAND_5GHZ)
+ txpower = ar->power_5G_ht40;
+ else
+ txpower = ar->power_2G_ht40;
+ } else {
+ if (info->band == IEEE80211_BAND_5GHZ)
+ txpower = ar->power_5G_ht20;
+ else
+ txpower = ar->power_2G_ht20;
+ }
+
+ power = txpower[(txrate->idx) & 7];
+ } else {
+ u8 *txpower;
+ u32 mod;
+ u32 phyrate;
+ u8 idx = txrate->idx;
+
+ if (info->band != IEEE80211_BAND_2GHZ) {
+ idx += 4;
+ txpower = ar->power_5G_leg;
+ mod = AR9170_TX_PHY_MOD_OFDM;
+ } else {
+ if (idx < 4) {
+ txpower = ar->power_2G_cck;
+ mod = AR9170_TX_PHY_MOD_CCK;
+ } else {
+ mod = AR9170_TX_PHY_MOD_OFDM;
+ txpower = ar->power_2G_ofdm;
+ }
+ }
+
+ rate = &__ar9170_ratetable[idx];
+
+ phyrate = rate->hw_value & 0xF;
+ power = txpower[(rate->hw_value & 0x30) >> 4];
+ phyrate <<= AR9170_TX_PHY_MCS_SHIFT;
+
+ txc->phy_control |= cpu_to_le32(mod);
+ txc->phy_control |= cpu_to_le32(phyrate);
+ }
+
+ power <<= AR9170_TX_PHY_TX_PWR_SHIFT;
+ power &= AR9170_TX_PHY_TX_PWR_MASK;
+ txc->phy_control |= cpu_to_le32(power);
+
+ /* set TX chains */
+ if (ar->eeprom.tx_mask == 1) {
+ chains = AR9170_TX_PHY_TXCHAIN_1;
+ } else {
+ chains = AR9170_TX_PHY_TXCHAIN_2;
+
+ /* >= 36M legacy OFDM - use only one chain */
+ if (rate && rate->bitrate >= 360)
+ chains = AR9170_TX_PHY_TXCHAIN_1;
+ }
+ txc->phy_control |= cpu_to_le32(chains << AR9170_TX_PHY_TXCHAIN_SHIFT);
+
+ if (tx_status) {
+ txc->mac_control |= cpu_to_le16(AR9170_TX_MAC_RATE_PROBE);
+ /*
+ * WARNING:
+ * Putting the QoS queue bits into an unexplored territory is
+ * certainly not elegant.
+ *
+ * In my defense: This idea provides a reasonable way to
+ * smuggle valuable information to the tx_status callback.
+ * Also, the idea behind this bit-abuse came straight from
+ * the original driver code.
+ */
+
+ txc->phy_control |=
+ cpu_to_le32(queue << AR9170_TX_PHY_QOS_SHIFT);
+
+ if (info->control.sta) {
+ sta_info = (void *) info->control.sta->drv_priv;
+ skb_queue_tail(&sta_info->tx_status, skb);
+ } else {
+ skb_queue_tail(&ar->global_tx_status, skb);
+
+ queue_delayed_work(ar->hw->workqueue,
+ &ar->tx_status_janitor,
+ msecs_to_jiffies(100));
+ }
+ }
+
+ err = ar->tx(ar, skb, tx_status, 0);
+ if (unlikely(tx_status && err)) {
+ if (info->control.sta)
+ skb_unlink(skb, &sta_info->tx_status);
+ else
+ skb_unlink(skb, &ar->global_tx_status);
+ }
+
+ return NETDEV_TX_OK;
+
+err_dequeue:
+ spin_lock_irqsave(&ar->tx_stats_lock, flags);
+ ar->tx_stats[queue].len--;
+ ar->tx_stats[queue].count--;
+ spin_unlock_irqrestore(&ar->tx_stats_lock, flags);
+
+err_free:
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static int ar9170_op_add_interface(struct ieee80211_hw *hw,
+ struct ieee80211_if_init_conf *conf)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0;
+
+ mutex_lock(&ar->mutex);
+
+ if (ar->vif) {
+ err = -EBUSY;
+ goto unlock;
+ }
+
+ ar->vif = conf->vif;
+ memcpy(ar->mac_addr, conf->mac_addr, ETH_ALEN);
+
+ if (modparam_nohwcrypt || (ar->vif->type != NL80211_IFTYPE_STATION)) {
+ ar->rx_software_decryption = true;
+ ar->disable_offload = true;
+ }
+
+ ar->cur_filter = 0;
+ ar->want_filter = AR9170_MAC_REG_FTF_DEFAULTS;
+ err = ar9170_update_frame_filter(ar);
+ if (err)
+ goto unlock;
+
+ err = ar9170_set_operating_mode(ar);
+
+unlock:
+ mutex_unlock(&ar->mutex);
+ return err;
+}
+
+static void ar9170_op_remove_interface(struct ieee80211_hw *hw,
+ struct ieee80211_if_init_conf *conf)
+{
+ struct ar9170 *ar = hw->priv;
+
+ mutex_lock(&ar->mutex);
+ ar->vif = NULL;
+ ar->want_filter = 0;
+ ar9170_update_frame_filter(ar);
+ ar9170_set_beacon_timers(ar);
+ dev_kfree_skb(ar->beacon);
+ ar->beacon = NULL;
+ ar->sniffer_enabled = false;
+ ar->rx_software_decryption = false;
+ ar9170_set_operating_mode(ar);
+ mutex_unlock(&ar->mutex);
+}
+
+static int ar9170_op_config(struct ieee80211_hw *hw, u32 changed)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0;
+
+ mutex_lock(&ar->mutex);
+
+ if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_PS) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_POWER) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
+ /*
+ * is it long_frame_max_tx_count or short_frame_max_tx_count?
+ */
+
+ err = ar9170_set_hwretry_limit(ar,
+ ar->hw->conf.long_frame_max_tx_count);
+ if (err)
+ goto out;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_BEACON_INTERVAL) {
+ err = ar9170_set_beacon_timers(ar);
+ if (err)
+ goto out;
+ }
+
+ if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+ err = ar9170_set_channel(ar, hw->conf.channel,
+ AR9170_RFI_NONE, AR9170_BW_20);
+ if (err)
+ goto out;
+ /* adjust slot time for 5 GHz */
+ if (hw->conf.channel->band == IEEE80211_BAND_5GHZ)
+ err = ar9170_write_reg(ar, AR9170_MAC_REG_SLOT_TIME,
+ 9 << 10);
+ }
+
+out:
+ mutex_unlock(&ar->mutex);
+ return err;
+}
+
+static int ar9170_op_config_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_if_conf *conf)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0;
+
+ mutex_lock(&ar->mutex);
+
+ if (conf->changed & IEEE80211_IFCC_BSSID) {
+ memcpy(ar->bssid, conf->bssid, ETH_ALEN);
+ err = ar9170_set_operating_mode(ar);
+ }
+
+ if (conf->changed & IEEE80211_IFCC_BEACON) {
+ err = ar9170_update_beacon(ar);
+
+ if (err)
+ goto out;
+ err = ar9170_set_beacon_timers(ar);
+ }
+
+out:
+ mutex_unlock(&ar->mutex);
+ return err;
+}
+
+static void ar9170_set_filters(struct work_struct *work)
+{
+ struct ar9170 *ar = container_of(work, struct ar9170,
+ filter_config_work);
+ int err;
+
+ mutex_lock(&ar->mutex);
+ if (unlikely(!IS_STARTED(ar)))
+ goto unlock;
+
+ if (ar->filter_changed & AR9170_FILTER_CHANGED_PROMISC) {
+ err = ar9170_set_operating_mode(ar);
+ if (err)
+ goto unlock;
+ }
+
+ if (ar->filter_changed & AR9170_FILTER_CHANGED_MULTICAST) {
+ err = ar9170_update_multicast(ar);
+ if (err)
+ goto unlock;
+ }
+
+ if (ar->filter_changed & AR9170_FILTER_CHANGED_FRAMEFILTER)
+ err = ar9170_update_frame_filter(ar);
+
+unlock:
+ mutex_unlock(&ar->mutex);
+}
+
+static void ar9170_op_configure_filter(struct ieee80211_hw *hw,
+ unsigned int changed_flags,
+ unsigned int *new_flags,
+ int mc_count, struct dev_mc_list *mclist)
+{
+ struct ar9170 *ar = hw->priv;
+
+ /* mask supported flags */
+ *new_flags &= FIF_ALLMULTI | FIF_CONTROL | FIF_BCN_PRBRESP_PROMISC |
+ FIF_PROMISC_IN_BSS;
+
+ /*
+ * We can support more by setting the sniffer bit and
+ * then checking the error flags, later.
+ */
+
+ if (changed_flags & FIF_ALLMULTI) {
+ if (*new_flags & FIF_ALLMULTI) {
+ ar->want_mc_hash = ~0ULL;
+ } else {
+ u64 mchash;
+ int i;
+
+ /* always get broadcast frames */
+ mchash = 1ULL << (0xff>>2);
+
+ for (i = 0; i < mc_count; i++) {
+ if (WARN_ON(!mclist))
+ break;
+ mchash |= 1ULL << (mclist->dmi_addr[5] >> 2);
+ mclist = mclist->next;
+ }
+ ar->want_mc_hash = mchash;
+ }
+ ar->filter_changed |= AR9170_FILTER_CHANGED_MULTICAST;
+ }
+
+ if (changed_flags & FIF_CONTROL) {
+ u32 filter = AR9170_MAC_REG_FTF_PSPOLL |
+ AR9170_MAC_REG_FTF_RTS |
+ AR9170_MAC_REG_FTF_CTS |
+ AR9170_MAC_REG_FTF_ACK |
+ AR9170_MAC_REG_FTF_CFE |
+ AR9170_MAC_REG_FTF_CFE_ACK;
+
+ if (*new_flags & FIF_CONTROL)
+ ar->want_filter = ar->cur_filter | filter;
+ else
+ ar->want_filter = ar->cur_filter & ~filter;
+
+ ar->filter_changed |= AR9170_FILTER_CHANGED_FRAMEFILTER;
+ }
+
+ if (changed_flags & FIF_PROMISC_IN_BSS) {
+ ar->sniffer_enabled = ((*new_flags) & FIF_PROMISC_IN_BSS) != 0;
+ ar->filter_changed |= AR9170_FILTER_CHANGED_PROMISC;
+ }
+
+ if (likely(IS_STARTED(ar)))
+ queue_work(ar->hw->workqueue, &ar->filter_config_work);
+}
+
+static void ar9170_op_bss_info_changed(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *bss_conf,
+ u32 changed)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0;
+
+ mutex_lock(&ar->mutex);
+
+ ar9170_regwrite_begin(ar);
+
+ if (changed & BSS_CHANGED_ASSOC) {
+ ar->state = bss_conf->assoc ? AR9170_ASSOCIATED : ar->state;
+
+#ifndef CONFIG_AR9170_LEDS
+ /* enable assoc LED. */
+ err = ar9170_set_leds_state(ar, bss_conf->assoc ? 2 : 0);
+#endif /* CONFIG_AR9170_LEDS */
+ }
+
+ if (changed & BSS_CHANGED_HT) {
+ /* TODO */
+ err = 0;
+ }
+
+ if (changed & BSS_CHANGED_ERP_SLOT) {
+ u32 slottime = 20;
+
+ if (bss_conf->use_short_slot)
+ slottime = 9;
+
+ ar9170_regwrite(AR9170_MAC_REG_SLOT_TIME, slottime << 10);
+ }
+
+ if (changed & BSS_CHANGED_BASIC_RATES) {
+ u32 cck, ofdm;
+
+ if (hw->conf.channel->band == IEEE80211_BAND_5GHZ) {
+ ofdm = bss_conf->basic_rates;
+ cck = 0;
+ } else {
+ /* four cck rates */
+ cck = bss_conf->basic_rates & 0xf;
+ ofdm = bss_conf->basic_rates >> 4;
+ }
+ ar9170_regwrite(AR9170_MAC_REG_BASIC_RATE,
+ ofdm << 8 | cck);
+ }
+
+ ar9170_regwrite_finish();
+ err = ar9170_regwrite_result();
+ mutex_unlock(&ar->mutex);
+}
+
+static u64 ar9170_op_get_tsf(struct ieee80211_hw *hw)
+{
+ struct ar9170 *ar = hw->priv;
+ int err;
+ u32 tsf_low;
+ u32 tsf_high;
+ u64 tsf;
+
+ mutex_lock(&ar->mutex);
+ err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_L, &tsf_low);
+ if (!err)
+ err = ar9170_read_reg(ar, AR9170_MAC_REG_TSF_H, &tsf_high);
+ mutex_unlock(&ar->mutex);
+
+ if (WARN_ON(err))
+ return 0;
+
+ tsf = tsf_high;
+ tsf = (tsf << 32) | tsf_low;
+ return tsf;
+}
+
+static int ar9170_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
+ struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key)
+{
+ struct ar9170 *ar = hw->priv;
+ int err = 0, i;
+ u8 ktype;
+
+ if ((!ar->vif) || (ar->disable_offload))
+ return -EOPNOTSUPP;
+
+ switch (key->alg) {
+ case ALG_WEP:
+ if (key->keylen == LEN_WEP40)
+ ktype = AR9170_ENC_ALG_WEP64;
+ else
+ ktype = AR9170_ENC_ALG_WEP128;
+ break;
+ case ALG_TKIP:
+ ktype = AR9170_ENC_ALG_TKIP;
+ break;
+ case ALG_CCMP:
+ ktype = AR9170_ENC_ALG_AESCCMP;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(&ar->mutex);
+ if (cmd == SET_KEY) {
+ if (unlikely(!IS_STARTED(ar))) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ /* group keys need all-zeroes address */
+ if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
+ sta = NULL;
+
+ if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
+ for (i = 0; i < 64; i++)
+ if (!(ar->usedkeys & BIT(i)))
+ break;
+ if (i == 64) {
+ ar->rx_software_decryption = true;
+ ar9170_set_operating_mode(ar);
+ err = -ENOSPC;
+ goto out;
+ }
+ } else {
+ i = 64 + key->keyidx;
+ }
+
+ key->hw_key_idx = i;
+
+ err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL, ktype, 0,
+ key->key, min_t(u8, 16, key->keylen));
+ if (err)
+ goto out;
+
+ if (key->alg == ALG_TKIP) {
+ err = ar9170_upload_key(ar, i, sta ? sta->addr : NULL,
+ ktype, 1, key->key + 16, 16);
+ if (err)
+ goto out;
+
+ /*
+ * hardware is not capable generating the MMIC
+ * for fragmented frames!
+ */
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
+ }
+
+ if (i < 64)
+ ar->usedkeys |= BIT(i);
+
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ } else {
+ if (unlikely(!IS_STARTED(ar))) {
+ /* The device is gone... together with the key ;-) */
+ err = 0;
+ goto out;
+ }
+
+ err = ar9170_disable_key(ar, key->hw_key_idx);
+ if (err)
+ goto out;
+
+ if (key->hw_key_idx < 64) {
+ ar->usedkeys &= ~BIT(key->hw_key_idx);
+ } else {
+ err = ar9170_upload_key(ar, key->hw_key_idx, NULL,
+ AR9170_ENC_ALG_NONE, 0,
+ NULL, 0);
+ if (err)
+ goto out;
+
+ if (key->alg == ALG_TKIP) {
+ err = ar9170_upload_key(ar, key->hw_key_idx,
+ NULL,
+ AR9170_ENC_ALG_NONE, 1,
+ NULL, 0);
+ if (err)
+ goto out;
+ }
+
+ }
+ }
+
+ ar9170_regwrite_begin(ar);
+ ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_L, ar->usedkeys);
+ ar9170_regwrite(AR9170_MAC_REG_ROLL_CALL_TBL_H, ar->usedkeys >> 32);
+ ar9170_regwrite_finish();
+ err = ar9170_regwrite_result();
+
+out:
+ mutex_unlock(&ar->mutex);
+
+ return err;
+}
+
+static void ar9170_sta_notify(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ enum sta_notify_cmd cmd,
+ struct ieee80211_sta *sta)
+{
+ struct ar9170 *ar = hw->priv;
+ struct ar9170_sta_info *info = (void *) sta->drv_priv;
+ struct sk_buff *skb;
+
+ switch (cmd) {
+ case STA_NOTIFY_ADD:
+ skb_queue_head_init(&info->tx_status);
+
+ /*
+ * do we already have a frame that needs tx_status
+ * from this station in our queue?
+ * If so then transfer them to the new station queue.
+ */
+
+ /* preserve the correct order - check the waste bin first */
+ while ((skb = ar9170_find_skb_in_queue_by_mac(ar, sta->addr,
+ &ar->global_tx_status_waste)))
+ skb_queue_tail(&info->tx_status, skb);
+
+ /* now the still pending frames */
+ while ((skb = ar9170_find_skb_in_queue_by_mac(ar, sta->addr,
+ &ar->global_tx_status)))
+ skb_queue_tail(&info->tx_status, skb);
+
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: STA[%pM] has %d queued frames =>\n",
+ wiphy_name(ar->hw->wiphy), sta->addr,
+ skb_queue_len(&info->tx_status));
+
+ ar9170_dump_station_tx_status_queue(ar, &info->tx_status);
+#endif /* AR9170_QUEUE_DEBUG */
+
+
+ break;
+
+ case STA_NOTIFY_REMOVE:
+
+ /*
+ * transfer all outstanding frames that need a tx_status
+ * reports to the fallback queue
+ */
+
+ while ((skb = skb_dequeue(&ar->global_tx_status))) {
+#ifdef AR9170_QUEUE_DEBUG
+ printk(KERN_DEBUG "%s: queueing frame in global "
+ "tx_status queue =>\n",
+ wiphy_name(ar->hw->wiphy));
+
+ ar9170_print_txheader(ar, skb);
+#endif /* AR9170_QUEUE_DEBUG */
+ skb_queue_tail(&ar->global_tx_status_waste, skb);
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+static int ar9170_get_stats(struct ieee80211_hw *hw,
+ struct ieee80211_low_level_stats *stats)
+{
+ struct ar9170 *ar = hw->priv;
+ u32 val;
+ int err;
+
+ mutex_lock(&ar->mutex);
+ err = ar9170_read_reg(ar, AR9170_MAC_REG_TX_RETRY, &val);
+ ar->stats.dot11ACKFailureCount += val;
+
+ memcpy(stats, &ar->stats, sizeof(*stats));
+ mutex_unlock(&ar->mutex);
+
+ return 0;
+}
+
+static int ar9170_get_tx_stats(struct ieee80211_hw *hw,
+ struct ieee80211_tx_queue_stats *tx_stats)
+{
+ struct ar9170 *ar = hw->priv;
+
+ spin_lock_bh(&ar->tx_stats_lock);
+ memcpy(tx_stats, ar->tx_stats, sizeof(tx_stats[0]) * hw->queues);
+ spin_unlock_bh(&ar->tx_stats_lock);
+
+ return 0;
+}
+
+static int ar9170_conf_tx(struct ieee80211_hw *hw, u16 queue,
+ const struct ieee80211_tx_queue_params *param)
+{
+ struct ar9170 *ar = hw->priv;
+ int ret;
+
+ mutex_lock(&ar->mutex);
+ if ((param) && !(queue > 4)) {
+ memcpy(&ar->edcf[ar9170_qos_hwmap[queue]],
+ param, sizeof(*param));
+
+ ret = ar9170_set_qos(ar);
+ } else
+ ret = -EINVAL;
+
+ mutex_unlock(&ar->mutex);
+ return ret;
+}
+
+static const struct ieee80211_ops ar9170_ops = {
+ .start = ar9170_op_start,
+ .stop = ar9170_op_stop,
+ .tx = ar9170_op_tx,
+ .add_interface = ar9170_op_add_interface,
+ .remove_interface = ar9170_op_remove_interface,
+ .config = ar9170_op_config,
+ .config_interface = ar9170_op_config_interface,
+ .configure_filter = ar9170_op_configure_filter,
+ .conf_tx = ar9170_conf_tx,
+ .bss_info_changed = ar9170_op_bss_info_changed,
+ .get_tsf = ar9170_op_get_tsf,
+ .set_key = ar9170_set_key,
+ .sta_notify = ar9170_sta_notify,
+ .get_stats = ar9170_get_stats,
+ .get_tx_stats = ar9170_get_tx_stats,
+};
+
+void *ar9170_alloc(size_t priv_size)
+{
+ struct ieee80211_hw *hw;
+ struct ar9170 *ar;
+ int i;
+
+ hw = ieee80211_alloc_hw(priv_size, &ar9170_ops);
+ if (!hw)
+ return ERR_PTR(-ENOMEM);
+
+ ar = hw->priv;
+ ar->hw = hw;
+
+ mutex_init(&ar->mutex);
+ spin_lock_init(&ar->cmdlock);
+ spin_lock_init(&ar->tx_stats_lock);
+ skb_queue_head_init(&ar->global_tx_status);
+ skb_queue_head_init(&ar->global_tx_status_waste);
+ INIT_WORK(&ar->filter_config_work, ar9170_set_filters);
+ INIT_WORK(&ar->beacon_work, ar9170_new_beacon);
+ INIT_DELAYED_WORK(&ar->tx_status_janitor, ar9170_tx_status_janitor);
+
+ /* all hw supports 2.4 GHz, so set channel to 1 by default */
+ ar->channel = &ar9170_2ghz_chantable[0];
+
+ /* first part of wiphy init */
+ ar->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+ BIT(NL80211_IFTYPE_WDS) |
+ BIT(NL80211_IFTYPE_ADHOC);
+ ar->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
+ IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
+ IEEE80211_HW_SIGNAL_DBM |
+ IEEE80211_HW_NOISE_DBM;
+
+ ar->hw->queues = 4;
+ ar->hw->extra_tx_headroom = 8;
+ ar->hw->sta_data_size = sizeof(struct ar9170_sta_info);
+
+ ar->hw->max_rates = 1;
+ ar->hw->max_rate_tries = 3;
+
+ for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
+ ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
+
+ return ar;
+}
+EXPORT_SYMBOL_GPL(ar9170_alloc);
+
+static int ar9170_read_eeprom(struct ar9170 *ar)
+{
+#define RW 8 /* number of words to read at once */
+#define RB (sizeof(u32) * RW)
+ DECLARE_MAC_BUF(mbuf);
+ u8 *eeprom = (void *)&ar->eeprom;
+ u8 *addr = ar->eeprom.mac_address;
+ __le32 offsets[RW];
+ int i, j, err, bands = 0;
+
+ BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
+
+ BUILD_BUG_ON(RB > AR9170_MAX_CMD_LEN - 4);
+#ifndef __CHECKER__
+ /* don't want to handle trailing remains */
+ BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
+#endif
+
+ for (i = 0; i < sizeof(ar->eeprom)/RB; i++) {
+ for (j = 0; j < RW; j++)
+ offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
+ RB * i + 4 * j);
+
+ err = ar->exec_cmd(ar, AR9170_CMD_RREG,
+ RB, (u8 *) &offsets,
+ RB, eeprom + RB * i);
+ if (err)
+ return err;
+ }
+
+#undef RW
+#undef RB
+
+ if (ar->eeprom.length == cpu_to_le16(0xFFFF))
+ return -ENODATA;
+
+ if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
+ ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &ar9170_band_2GHz;
+ bands++;
+ }
+ if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
+ ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &ar9170_band_5GHz;
+ bands++;
+ }
+ /*
+ * I measured this, a bandswitch takes roughly
+ * 135 ms and a frequency switch about 80.
+ *
+ * FIXME: measure these values again once EEPROM settings
+ * are used, that will influence them!
+ */
+ if (bands == 2)
+ ar->hw->channel_change_time = 135 * 1000;
+ else
+ ar->hw->channel_change_time = 80 * 1000;
+
+ /* second part of wiphy init */
+ SET_IEEE80211_PERM_ADDR(ar->hw, addr);
+
+ return bands ? 0 : -EINVAL;
+}
+
+int ar9170_register(struct ar9170 *ar, struct device *pdev)
+{
+ int err;
+
+ /* try to read EEPROM, init MAC addr */
+ err = ar9170_read_eeprom(ar);
+ if (err)
+ goto err_out;
+
+ err = ieee80211_register_hw(ar->hw);
+ if (err)
+ goto err_out;
+
+ err = ar9170_init_leds(ar);
+ if (err)
+ goto err_unreg;
+
+#ifdef CONFIG_AR9170_LEDS
+ err = ar9170_register_leds(ar);
+ if (err)
+ goto err_unreg;
+#endif /* CONFIG_AR9170_LEDS */
+
+ dev_info(pdev, "Atheros AR9170 is registered as '%s'\n",
+ wiphy_name(ar->hw->wiphy));
+
+ return err;
+
+err_unreg:
+ ieee80211_unregister_hw(ar->hw);
+
+err_out:
+ return err;
+}
+EXPORT_SYMBOL_GPL(ar9170_register);
+
+void ar9170_unregister(struct ar9170 *ar)
+{
+#ifdef CONFIG_AR9170_LEDS
+ ar9170_unregister_leds(ar);
+#endif /* CONFIG_AR9170_LEDS */
+
+ ieee80211_unregister_hw(ar->hw);
+ mutex_destroy(&ar->mutex);
+}
+EXPORT_SYMBOL_GPL(ar9170_unregister);
+
+static int __init ar9170_init(void)
+{
+ if (modparam_nohwcrypt)
+ printk(KERN_INFO "ar9170: cryptographic acceleration "
+ "disabled.\n");
+
+ return 0;
+}
+
+static void __exit ar9170_exit(void)
+{
+
+}
+
+module_init(ar9170_init);
+module_exit(ar9170_exit);
projects / linux-2.6-omap-h63xx.git / commitdiff