1 /******************************************************************************
3 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/pci.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/delay.h>
33 #include <linux/skbuff.h>
34 #include <linux/netdevice.h>
35 #include <linux/wireless.h>
36 #include <linux/firmware.h>
37 #include <linux/etherdevice.h>
38 #include <asm/unaligned.h>
39 #include <net/mac80211.h>
41 #include "iwl-3945-fh.h"
42 #include "iwl-commands.h"
44 #include "iwl-helpers.h"
46 #include "iwl-agn-rs.h"
48 #define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np) \
49 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
50 IWL_RATE_##r##M_IEEE, \
51 IWL_RATE_##ip##M_INDEX, \
52 IWL_RATE_##in##M_INDEX, \
53 IWL_RATE_##rp##M_INDEX, \
54 IWL_RATE_##rn##M_INDEX, \
55 IWL_RATE_##pp##M_INDEX, \
56 IWL_RATE_##np##M_INDEX, \
57 IWL_RATE_##r##M_INDEX_TABLE, \
58 IWL_RATE_##ip##M_INDEX_TABLE }
62 * rate, prev rate, next rate, prev tgg rate, next tgg rate
64 * If there isn't a valid next or previous rate then INV is used which
65 * maps to IWL_RATE_INVALID
68 const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT_3945] = {
69 IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2), /* 1mbps */
70 IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5), /* 2mbps */
71 IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11), /*5.5mbps */
72 IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18), /* 11mbps */
73 IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11), /* 6mbps */
74 IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11), /* 9mbps */
75 IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18), /* 12mbps */
76 IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24), /* 18mbps */
77 IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36), /* 24mbps */
78 IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48), /* 36mbps */
79 IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54), /* 48mbps */
80 IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
83 /* 1 = enable the iwl3945_disable_events() function */
84 #define IWL_EVT_DISABLE (0)
85 #define IWL_EVT_DISABLE_SIZE (1532/32)
88 * iwl3945_disable_events - Disable selected events in uCode event log
90 * Disable an event by writing "1"s into "disable"
91 * bitmap in SRAM. Bit position corresponds to Event # (id/type).
92 * Default values of 0 enable uCode events to be logged.
93 * Use for only special debugging. This function is just a placeholder as-is,
94 * you'll need to provide the special bits! ...
95 * ... and set IWL_EVT_DISABLE to 1. */
96 void iwl3945_disable_events(struct iwl_priv *priv)
100 u32 base; /* SRAM address of event log header */
101 u32 disable_ptr; /* SRAM address of event-disable bitmap array */
102 u32 array_size; /* # of u32 entries in array */
103 u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
104 0x00000000, /* 31 - 0 Event id numbers */
105 0x00000000, /* 63 - 32 */
106 0x00000000, /* 95 - 64 */
107 0x00000000, /* 127 - 96 */
108 0x00000000, /* 159 - 128 */
109 0x00000000, /* 191 - 160 */
110 0x00000000, /* 223 - 192 */
111 0x00000000, /* 255 - 224 */
112 0x00000000, /* 287 - 256 */
113 0x00000000, /* 319 - 288 */
114 0x00000000, /* 351 - 320 */
115 0x00000000, /* 383 - 352 */
116 0x00000000, /* 415 - 384 */
117 0x00000000, /* 447 - 416 */
118 0x00000000, /* 479 - 448 */
119 0x00000000, /* 511 - 480 */
120 0x00000000, /* 543 - 512 */
121 0x00000000, /* 575 - 544 */
122 0x00000000, /* 607 - 576 */
123 0x00000000, /* 639 - 608 */
124 0x00000000, /* 671 - 640 */
125 0x00000000, /* 703 - 672 */
126 0x00000000, /* 735 - 704 */
127 0x00000000, /* 767 - 736 */
128 0x00000000, /* 799 - 768 */
129 0x00000000, /* 831 - 800 */
130 0x00000000, /* 863 - 832 */
131 0x00000000, /* 895 - 864 */
132 0x00000000, /* 927 - 896 */
133 0x00000000, /* 959 - 928 */
134 0x00000000, /* 991 - 960 */
135 0x00000000, /* 1023 - 992 */
136 0x00000000, /* 1055 - 1024 */
137 0x00000000, /* 1087 - 1056 */
138 0x00000000, /* 1119 - 1088 */
139 0x00000000, /* 1151 - 1120 */
140 0x00000000, /* 1183 - 1152 */
141 0x00000000, /* 1215 - 1184 */
142 0x00000000, /* 1247 - 1216 */
143 0x00000000, /* 1279 - 1248 */
144 0x00000000, /* 1311 - 1280 */
145 0x00000000, /* 1343 - 1312 */
146 0x00000000, /* 1375 - 1344 */
147 0x00000000, /* 1407 - 1376 */
148 0x00000000, /* 1439 - 1408 */
149 0x00000000, /* 1471 - 1440 */
150 0x00000000, /* 1503 - 1472 */
153 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
154 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
155 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
159 ret = iwl_grab_nic_access(priv);
161 IWL_WARN(priv, "Can not read from adapter at this time.\n");
165 disable_ptr = iwl_read_targ_mem(priv, base + (4 * sizeof(u32)));
166 array_size = iwl_read_targ_mem(priv, base + (5 * sizeof(u32)));
167 iwl_release_nic_access(priv);
169 if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
170 IWL_DEBUG_INFO("Disabling selected uCode log events at 0x%x\n",
172 ret = iwl_grab_nic_access(priv);
173 for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
174 iwl_write_targ_mem(priv,
175 disable_ptr + (i * sizeof(u32)),
178 iwl_release_nic_access(priv);
180 IWL_DEBUG_INFO("Selected uCode log events may be disabled\n");
181 IWL_DEBUG_INFO(" by writing \"1\"s into disable bitmap\n");
182 IWL_DEBUG_INFO(" in SRAM at 0x%x, size %d u32s\n",
183 disable_ptr, array_size);
188 static int iwl3945_hwrate_to_plcp_idx(u8 plcp)
192 for (idx = 0; idx < IWL_RATE_COUNT; idx++)
193 if (iwl3945_rates[idx].plcp == plcp)
199 * iwl3945_get_antenna_flags - Get antenna flags for RXON command
200 * @priv: eeprom and antenna fields are used to determine antenna flags
202 * priv->eeprom39 is used to determine if antenna AUX/MAIN are reversed
203 * priv->antenna specifies the antenna diversity mode:
205 * IWL_ANTENNA_DIVERSITY - NIC selects best antenna by itself
206 * IWL_ANTENNA_MAIN - Force MAIN antenna
207 * IWL_ANTENNA_AUX - Force AUX antenna
209 __le32 iwl3945_get_antenna_flags(const struct iwl_priv *priv)
211 switch (priv->antenna) {
212 case IWL_ANTENNA_DIVERSITY:
215 case IWL_ANTENNA_MAIN:
216 if (priv->eeprom39.antenna_switch_type)
217 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
218 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
220 case IWL_ANTENNA_AUX:
221 if (priv->eeprom39.antenna_switch_type)
222 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_A_MSK;
223 return RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_B_MSK;
226 /* bad antenna selector value */
227 IWL_ERR(priv, "Bad antenna selector value (0x%x)\n", priv->antenna);
228 return 0; /* "diversity" is default if error */
231 #ifdef CONFIG_IWL3945_DEBUG
232 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
234 static const char *iwl3945_get_tx_fail_reason(u32 status)
236 switch (status & TX_STATUS_MSK) {
237 case TX_STATUS_SUCCESS:
239 TX_STATUS_ENTRY(SHORT_LIMIT);
240 TX_STATUS_ENTRY(LONG_LIMIT);
241 TX_STATUS_ENTRY(FIFO_UNDERRUN);
242 TX_STATUS_ENTRY(MGMNT_ABORT);
243 TX_STATUS_ENTRY(NEXT_FRAG);
244 TX_STATUS_ENTRY(LIFE_EXPIRE);
245 TX_STATUS_ENTRY(DEST_PS);
246 TX_STATUS_ENTRY(ABORTED);
247 TX_STATUS_ENTRY(BT_RETRY);
248 TX_STATUS_ENTRY(STA_INVALID);
249 TX_STATUS_ENTRY(FRAG_DROPPED);
250 TX_STATUS_ENTRY(TID_DISABLE);
251 TX_STATUS_ENTRY(FRAME_FLUSHED);
252 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
253 TX_STATUS_ENTRY(TX_LOCKED);
254 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
260 static inline const char *iwl3945_get_tx_fail_reason(u32 status)
267 * get ieee prev rate from rate scale table.
268 * for A and B mode we need to overright prev
271 int iwl3945_rs_next_rate(struct iwl_priv *priv, int rate)
273 int next_rate = iwl3945_get_prev_ieee_rate(rate);
275 switch (priv->band) {
276 case IEEE80211_BAND_5GHZ:
277 if (rate == IWL_RATE_12M_INDEX)
278 next_rate = IWL_RATE_9M_INDEX;
279 else if (rate == IWL_RATE_6M_INDEX)
280 next_rate = IWL_RATE_6M_INDEX;
282 case IEEE80211_BAND_2GHZ:
283 if (!(priv->sta_supp_rates & IWL_OFDM_RATES_MASK) &&
284 iwl3945_is_associated(priv)) {
285 if (rate == IWL_RATE_11M_INDEX)
286 next_rate = IWL_RATE_5M_INDEX;
299 * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
301 * When FW advances 'R' index, all entries between old and new 'R' index
302 * need to be reclaimed. As result, some free space forms. If there is
303 * enough free space (> low mark), wake the stack that feeds us.
305 static void iwl3945_tx_queue_reclaim(struct iwl_priv *priv,
306 int txq_id, int index)
308 struct iwl3945_tx_queue *txq = &priv->txq39[txq_id];
309 struct iwl_queue *q = &txq->q;
310 struct iwl3945_tx_info *tx_info;
312 BUG_ON(txq_id == IWL_CMD_QUEUE_NUM);
314 for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
315 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
317 tx_info = &txq->txb[txq->q.read_ptr];
318 ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0]);
319 tx_info->skb[0] = NULL;
320 iwl3945_hw_txq_free_tfd(priv, txq);
323 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
324 (txq_id != IWL_CMD_QUEUE_NUM) &&
325 priv->mac80211_registered)
326 ieee80211_wake_queue(priv->hw, txq_id);
330 * iwl3945_rx_reply_tx - Handle Tx response
332 static void iwl3945_rx_reply_tx(struct iwl_priv *priv,
333 struct iwl_rx_mem_buffer *rxb)
335 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
336 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
337 int txq_id = SEQ_TO_QUEUE(sequence);
338 int index = SEQ_TO_INDEX(sequence);
339 struct iwl3945_tx_queue *txq = &priv->txq39[txq_id];
340 struct ieee80211_tx_info *info;
341 struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
342 u32 status = le32_to_cpu(tx_resp->status);
346 if ((index >= txq->q.n_bd) || (iwl3945_x2_queue_used(&txq->q, index) == 0)) {
347 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
348 "is out of range [0-%d] %d %d\n", txq_id,
349 index, txq->q.n_bd, txq->q.write_ptr,
354 info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
355 ieee80211_tx_info_clear_status(info);
357 /* Fill the MRR chain with some info about on-chip retransmissions */
358 rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
359 if (info->band == IEEE80211_BAND_5GHZ)
360 rate_idx -= IWL_FIRST_OFDM_RATE;
362 fail = tx_resp->failure_frame;
364 info->status.rates[0].idx = rate_idx;
365 info->status.rates[0].count = fail + 1; /* add final attempt */
367 /* tx_status->rts_retry_count = tx_resp->failure_rts; */
368 info->flags |= ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
369 IEEE80211_TX_STAT_ACK : 0;
371 IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
372 txq_id, iwl3945_get_tx_fail_reason(status), status,
373 tx_resp->rate, tx_resp->failure_frame);
375 IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
376 iwl3945_tx_queue_reclaim(priv, txq_id, index);
378 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
379 IWL_ERR(priv, "TODO: Implement Tx ABORT REQUIRED!!!\n");
384 /*****************************************************************************
386 * Intel PRO/Wireless 3945ABG/BG Network Connection
388 * RX handler implementations
390 *****************************************************************************/
392 void iwl3945_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
394 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
395 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
396 (int)sizeof(struct iwl3945_notif_statistics),
397 le32_to_cpu(pkt->len));
399 memcpy(&priv->statistics_39, pkt->u.raw, sizeof(priv->statistics_39));
401 iwl3945_led_background(priv);
403 priv->last_statistics_time = jiffies;
406 /******************************************************************************
408 * Misc. internal state and helper functions
410 ******************************************************************************/
411 #ifdef CONFIG_IWL3945_DEBUG
414 * iwl3945_report_frame - dump frame to syslog during debug sessions
416 * You may hack this function to show different aspects of received frames,
417 * including selective frame dumps.
418 * group100 parameter selects whether to show 1 out of 100 good frames.
420 static void iwl3945_dbg_report_frame(struct iwl_priv *priv,
421 struct iwl_rx_packet *pkt,
422 struct ieee80211_hdr *header, int group100)
425 u32 print_summary = 0;
426 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
442 struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
443 struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
444 struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
445 u8 *data = IWL_RX_DATA(pkt);
448 fc = header->frame_control;
449 seq_ctl = le16_to_cpu(header->seq_ctrl);
452 channel = le16_to_cpu(rx_hdr->channel);
453 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
454 length = le16_to_cpu(rx_hdr->len);
456 /* end-of-frame status and timestamp */
457 status = le32_to_cpu(rx_end->status);
458 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
459 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
460 tsf = le64_to_cpu(rx_end->timestamp);
462 /* signal statistics */
463 rssi = rx_stats->rssi;
465 sig_avg = le16_to_cpu(rx_stats->sig_avg);
466 noise_diff = le16_to_cpu(rx_stats->noise_diff);
468 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
470 /* if data frame is to us and all is good,
471 * (optionally) print summary for only 1 out of every 100 */
472 if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
473 cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
476 print_summary = 1; /* print each frame */
477 else if (priv->framecnt_to_us < 100) {
478 priv->framecnt_to_us++;
481 priv->framecnt_to_us = 0;
486 /* print summary for all other frames */
496 else if (ieee80211_has_retry(fc))
498 else if (ieee80211_is_assoc_resp(fc))
500 else if (ieee80211_is_reassoc_resp(fc))
502 else if (ieee80211_is_probe_resp(fc)) {
504 print_dump = 1; /* dump frame contents */
505 } else if (ieee80211_is_beacon(fc)) {
507 print_dump = 1; /* dump frame contents */
508 } else if (ieee80211_is_atim(fc))
510 else if (ieee80211_is_auth(fc))
512 else if (ieee80211_is_deauth(fc))
514 else if (ieee80211_is_disassoc(fc))
519 rate = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
523 rate = iwl3945_rates[rate].ieee / 2;
525 /* print frame summary.
526 * MAC addresses show just the last byte (for brevity),
527 * but you can hack it to show more, if you'd like to. */
529 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
530 "len=%u, rssi=%d, chnl=%d, rate=%d, \n",
531 title, le16_to_cpu(fc), header->addr1[5],
532 length, rssi, channel, rate);
534 /* src/dst addresses assume managed mode */
535 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
536 "src=0x%02x, rssi=%u, tim=%lu usec, "
537 "phy=0x%02x, chnl=%d\n",
538 title, le16_to_cpu(fc), header->addr1[5],
539 header->addr3[5], rssi,
540 tsf_low - priv->scan_start_tsf,
545 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
548 static inline void iwl3945_dbg_report_frame(struct iwl_priv *priv,
549 struct iwl_rx_packet *pkt,
550 struct ieee80211_hdr *header, int group100)
555 /* This is necessary only for a number of statistics, see the caller. */
556 static int iwl3945_is_network_packet(struct iwl_priv *priv,
557 struct ieee80211_hdr *header)
559 /* Filter incoming packets to determine if they are targeted toward
560 * this network, discarding packets coming from ourselves */
561 switch (priv->iw_mode) {
562 case NL80211_IFTYPE_ADHOC: /* Header: Dest. | Source | BSSID */
563 /* packets to our IBSS update information */
564 return !compare_ether_addr(header->addr3, priv->bssid);
565 case NL80211_IFTYPE_STATION: /* Header: Dest. | AP{BSSID} | Source */
566 /* packets to our IBSS update information */
567 return !compare_ether_addr(header->addr2, priv->bssid);
573 static void iwl3945_pass_packet_to_mac80211(struct iwl_priv *priv,
574 struct iwl_rx_mem_buffer *rxb,
575 struct ieee80211_rx_status *stats)
577 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
578 #ifdef CONFIG_IWL3945_LEDS
579 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
581 struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
582 struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
583 short len = le16_to_cpu(rx_hdr->len);
585 /* We received data from the HW, so stop the watchdog */
586 if (unlikely((len + IWL39_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
587 IWL_DEBUG_DROP("Corruption detected!\n");
591 /* We only process data packets if the interface is open */
592 if (unlikely(!priv->is_open)) {
594 ("Dropping packet while interface is not open.\n");
598 skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
599 /* Set the size of the skb to the size of the frame */
600 skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
602 if (iwl3945_param_hwcrypto)
603 iwl3945_set_decrypted_flag(priv, rxb->skb,
604 le32_to_cpu(rx_end->status), stats);
606 #ifdef CONFIG_IWL3945_LEDS
607 if (ieee80211_is_data(hdr->frame_control))
608 priv->rxtxpackets += len;
610 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
614 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
616 static void iwl3945_rx_reply_rx(struct iwl_priv *priv,
617 struct iwl_rx_mem_buffer *rxb)
619 struct ieee80211_hdr *header;
620 struct ieee80211_rx_status rx_status;
621 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
622 struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
623 struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
624 struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
626 u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
627 u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
631 rx_status.mactime = le64_to_cpu(rx_end->timestamp);
633 ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel));
634 rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
635 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
637 rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
638 if (rx_status.band == IEEE80211_BAND_5GHZ)
639 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
641 rx_status.antenna = le16_to_cpu(rx_hdr->phy_flags &
642 RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
644 /* set the preamble flag if appropriate */
645 if (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
646 rx_status.flag |= RX_FLAG_SHORTPRE;
648 if ((unlikely(rx_stats->phy_count > 20))) {
650 ("dsp size out of range [0,20]: "
651 "%d/n", rx_stats->phy_count);
655 if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
656 || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
657 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
663 /* Convert 3945's rssi indicator to dBm */
664 rx_status.signal = rx_stats->rssi - IWL39_RSSI_OFFSET;
666 /* Set default noise value to -127 */
667 if (priv->last_rx_noise == 0)
668 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
670 /* 3945 provides noise info for OFDM frames only.
671 * sig_avg and noise_diff are measured by the 3945's digital signal
672 * processor (DSP), and indicate linear levels of signal level and
673 * distortion/noise within the packet preamble after
674 * automatic gain control (AGC). sig_avg should stay fairly
675 * constant if the radio's AGC is working well.
676 * Since these values are linear (not dB or dBm), linear
677 * signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
678 * Convert linear SNR to dB SNR, then subtract that from rssi dBm
679 * to obtain noise level in dBm.
680 * Calculate rx_status.signal (quality indicator in %) based on SNR. */
681 if (rx_stats_noise_diff) {
682 snr = rx_stats_sig_avg / rx_stats_noise_diff;
683 rx_status.noise = rx_status.signal -
684 iwl3945_calc_db_from_ratio(snr);
685 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal,
688 /* If noise info not available, calculate signal quality indicator (%)
689 * using just the dBm signal level. */
691 rx_status.noise = priv->last_rx_noise;
692 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal, 0);
696 IWL_DEBUG_STATS("Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
697 rx_status.signal, rx_status.noise, rx_status.qual,
698 rx_stats_sig_avg, rx_stats_noise_diff);
700 header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
702 network_packet = iwl3945_is_network_packet(priv, header);
704 IWL_DEBUG_STATS_LIMIT("[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
705 network_packet ? '*' : ' ',
706 le16_to_cpu(rx_hdr->channel),
707 rx_status.signal, rx_status.signal,
708 rx_status.noise, rx_status.rate_idx);
710 #ifdef CONFIG_IWL3945_DEBUG
711 if (priv->debug_level & (IWL_DL_RX))
712 /* Set "1" to report good data frames in groups of 100 */
713 iwl3945_dbg_report_frame(priv, pkt, header, 1);
716 if (network_packet) {
717 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
718 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
719 priv->last_rx_rssi = rx_status.signal;
720 priv->last_rx_noise = rx_status.noise;
723 iwl3945_pass_packet_to_mac80211(priv, rxb, &rx_status);
726 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
727 dma_addr_t addr, u16 len)
731 struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
733 count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
734 pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
736 if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
737 IWL_ERR(priv, "Error can not send more than %d chunks\n",
742 tfd->pa[count].addr = cpu_to_le32(addr);
743 tfd->pa[count].len = cpu_to_le32(len);
747 tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
748 TFD_CTL_PAD_SET(pad));
754 * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
756 * Does NOT advance any indexes
758 int iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
760 struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
761 struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
762 struct pci_dev *dev = priv->pci_dev;
767 if (txq->q.id == IWL_CMD_QUEUE_NUM)
768 /* nothing to cleanup after for host commands */
772 counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
773 if (counter > NUM_TFD_CHUNKS) {
774 IWL_ERR(priv, "Too many chunks: %i\n", counter);
775 /* @todo issue fatal error, it is quite serious situation */
779 /* unmap chunks if any */
781 for (i = 1; i < counter; i++) {
782 pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
783 le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
784 if (txq->txb[txq->q.read_ptr].skb[0]) {
785 struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
786 if (txq->txb[txq->q.read_ptr].skb[0]) {
787 /* Can be called from interrupt context */
788 dev_kfree_skb_any(skb);
789 txq->txb[txq->q.read_ptr].skb[0] = NULL;
796 u8 iwl3945_hw_find_station(struct iwl_priv *priv, const u8 *addr)
798 int i, start = IWL_AP_ID;
799 int ret = IWL_INVALID_STATION;
802 if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
803 (priv->iw_mode == NL80211_IFTYPE_AP))
806 if (is_broadcast_ether_addr(addr))
807 return priv->hw_params.bcast_sta_id;
809 spin_lock_irqsave(&priv->sta_lock, flags);
810 for (i = start; i < priv->hw_params.max_stations; i++)
811 if ((priv->stations_39[i].used) &&
813 (priv->stations_39[i].sta.sta.addr, addr))) {
818 IWL_DEBUG_INFO("can not find STA %pM (total %d)\n",
819 addr, priv->num_stations);
821 spin_unlock_irqrestore(&priv->sta_lock, flags);
826 * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
829 void iwl3945_hw_build_tx_cmd_rate(struct iwl_priv *priv, struct iwl_cmd *cmd,
830 struct ieee80211_tx_info *info,
831 struct ieee80211_hdr *hdr, int sta_id, int tx_id)
833 u16 hw_value = ieee80211_get_tx_rate(priv->hw, info)->hw_value;
834 u16 rate_index = min(hw_value & 0xffff, IWL_RATE_COUNT - 1);
840 __le16 fc = hdr->frame_control;
841 struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
843 rate = iwl3945_rates[rate_index].plcp;
844 tx_flags = tx->tx_flags;
846 /* We need to figure out how to get the sta->supp_rates while
847 * in this running context */
848 rate_mask = IWL_RATES_MASK;
850 if (tx_id >= IWL_CMD_QUEUE_NUM)
855 if (ieee80211_is_probe_resp(fc)) {
856 data_retry_limit = 3;
857 if (data_retry_limit < rts_retry_limit)
858 rts_retry_limit = data_retry_limit;
860 data_retry_limit = IWL_DEFAULT_TX_RETRY;
862 if (priv->data_retry_limit != -1)
863 data_retry_limit = priv->data_retry_limit;
865 if (ieee80211_is_mgmt(fc)) {
866 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
867 case cpu_to_le16(IEEE80211_STYPE_AUTH):
868 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
869 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
870 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
871 if (tx_flags & TX_CMD_FLG_RTS_MSK) {
872 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
873 tx_flags |= TX_CMD_FLG_CTS_MSK;
881 tx->rts_retry_limit = rts_retry_limit;
882 tx->data_retry_limit = data_retry_limit;
884 tx->tx_flags = tx_flags;
888 ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
891 tx->supp_rates[1] = (rate_mask & 0xF);
893 IWL_DEBUG_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
894 "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
895 tx->rate, le32_to_cpu(tx->tx_flags),
896 tx->supp_rates[1], tx->supp_rates[0]);
899 u8 iwl3945_sync_sta(struct iwl_priv *priv, int sta_id, u16 tx_rate, u8 flags)
901 unsigned long flags_spin;
902 struct iwl3945_station_entry *station;
904 if (sta_id == IWL_INVALID_STATION)
905 return IWL_INVALID_STATION;
907 spin_lock_irqsave(&priv->sta_lock, flags_spin);
908 station = &priv->stations_39[sta_id];
910 station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
911 station->sta.rate_n_flags = cpu_to_le16(tx_rate);
912 station->sta.mode = STA_CONTROL_MODIFY_MSK;
914 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
916 iwl3945_send_add_station(priv, &station->sta, flags);
917 IWL_DEBUG_RATE("SCALE sync station %d to rate %d\n",
922 static int iwl3945_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
927 spin_lock_irqsave(&priv->lock, flags);
928 rc = iwl_grab_nic_access(priv);
930 spin_unlock_irqrestore(&priv->lock, flags);
937 rc = pci_read_config_dword(priv->pci_dev,
938 PCI_POWER_SOURCE, &val);
939 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
940 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
941 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
942 ~APMG_PS_CTRL_MSK_PWR_SRC);
943 iwl_release_nic_access(priv);
945 iwl_poll_bit(priv, CSR_GPIO_IN,
946 CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
947 CSR_GPIO_IN_BIT_AUX_POWER, 5000);
949 iwl_release_nic_access(priv);
951 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
952 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
953 ~APMG_PS_CTRL_MSK_PWR_SRC);
955 iwl_release_nic_access(priv);
956 iwl_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
957 CSR_GPIO_IN_BIT_AUX_POWER, 5000); /* uS */
959 spin_unlock_irqrestore(&priv->lock, flags);
964 static int iwl3945_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
969 spin_lock_irqsave(&priv->lock, flags);
970 rc = iwl_grab_nic_access(priv);
972 spin_unlock_irqrestore(&priv->lock, flags);
976 iwl_write_direct32(priv, FH39_RCSR_RBD_BASE(0), rxq->dma_addr);
977 iwl_write_direct32(priv, FH39_RCSR_RPTR_ADDR(0),
979 offsetof(struct iwl3945_shared, rx_read_ptr[0]));
980 iwl_write_direct32(priv, FH39_RCSR_WPTR(0), 0);
981 iwl_write_direct32(priv, FH39_RCSR_CONFIG(0),
982 FH39_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
983 FH39_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
984 FH39_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
985 FH39_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
986 (RX_QUEUE_SIZE_LOG << FH39_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
987 FH39_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
988 (1 << FH39_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
989 FH39_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
991 /* fake read to flush all prev I/O */
992 iwl_read_direct32(priv, FH39_RSSR_CTRL);
994 iwl_release_nic_access(priv);
995 spin_unlock_irqrestore(&priv->lock, flags);
1000 static int iwl3945_tx_reset(struct iwl_priv *priv)
1003 unsigned long flags;
1005 spin_lock_irqsave(&priv->lock, flags);
1006 rc = iwl_grab_nic_access(priv);
1008 spin_unlock_irqrestore(&priv->lock, flags);
1013 iwl_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
1015 /* RA 0 is active */
1016 iwl_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
1018 /* all 6 fifo are active */
1019 iwl_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
1021 iwl_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
1022 iwl_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
1023 iwl_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
1024 iwl_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
1026 iwl_write_direct32(priv, FH39_TSSR_CBB_BASE,
1029 iwl_write_direct32(priv, FH39_TSSR_MSG_CONFIG,
1030 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
1031 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
1032 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
1033 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
1034 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
1035 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
1036 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
1038 iwl_release_nic_access(priv);
1039 spin_unlock_irqrestore(&priv->lock, flags);
1045 * iwl3945_txq_ctx_reset - Reset TX queue context
1047 * Destroys all DMA structures and initialize them again
1049 static int iwl3945_txq_ctx_reset(struct iwl_priv *priv)
1052 int txq_id, slots_num;
1054 iwl3945_hw_txq_ctx_free(priv);
1057 rc = iwl3945_tx_reset(priv);
1062 for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
1063 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
1064 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
1065 rc = iwl3945_tx_queue_init(priv, &priv->txq39[txq_id], slots_num,
1068 IWL_ERR(priv, "Tx %d queue init failed\n", txq_id);
1076 iwl3945_hw_txq_ctx_free(priv);
1080 int iwl3945_hw_nic_init(struct iwl_priv *priv)
1084 unsigned long flags;
1085 struct iwl_rx_queue *rxq = &priv->rxq;
1087 iwl3945_power_init_handle(priv);
1089 spin_lock_irqsave(&priv->lock, flags);
1090 iwl_set_bit(priv, CSR_ANA_PLL_CFG, CSR39_ANA_PLL_CFG_VAL);
1091 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1092 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1094 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1095 rc = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
1096 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1098 spin_unlock_irqrestore(&priv->lock, flags);
1099 IWL_DEBUG_INFO("Failed to init the card\n");
1103 rc = iwl_grab_nic_access(priv);
1105 spin_unlock_irqrestore(&priv->lock, flags);
1108 iwl_write_prph(priv, APMG_CLK_EN_REG,
1109 APMG_CLK_VAL_DMA_CLK_RQT |
1110 APMG_CLK_VAL_BSM_CLK_RQT);
1112 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1113 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1114 iwl_release_nic_access(priv);
1115 spin_unlock_irqrestore(&priv->lock, flags);
1117 /* Determine HW type */
1118 rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
1121 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
1123 iwl3945_nic_set_pwr_src(priv, 1);
1124 spin_lock_irqsave(&priv->lock, flags);
1126 if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
1127 IWL_DEBUG_INFO("RTP type \n");
1128 else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
1129 IWL_DEBUG_INFO("3945 RADIO-MB type\n");
1130 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1131 CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
1133 IWL_DEBUG_INFO("3945 RADIO-MM type\n");
1134 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1135 CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
1138 if (EEPROM_SKU_CAP_OP_MODE_MRC == priv->eeprom39.sku_cap) {
1139 IWL_DEBUG_INFO("SKU OP mode is mrc\n");
1140 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1141 CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
1143 IWL_DEBUG_INFO("SKU OP mode is basic\n");
1145 if ((priv->eeprom39.board_revision & 0xF0) == 0xD0) {
1146 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1147 priv->eeprom39.board_revision);
1148 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1149 CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1151 IWL_DEBUG_INFO("3945ABG revision is 0x%X\n",
1152 priv->eeprom39.board_revision);
1153 iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1154 CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1157 if (priv->eeprom39.almgor_m_version <= 1) {
1158 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1159 CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
1160 IWL_DEBUG_INFO("Card M type A version is 0x%X\n",
1161 priv->eeprom39.almgor_m_version);
1163 IWL_DEBUG_INFO("Card M type B version is 0x%X\n",
1164 priv->eeprom39.almgor_m_version);
1165 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1166 CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
1168 spin_unlock_irqrestore(&priv->lock, flags);
1170 if (priv->eeprom39.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
1171 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
1173 if (priv->eeprom39.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
1174 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
1176 /* Allocate the RX queue, or reset if it is already allocated */
1178 rc = iwl3945_rx_queue_alloc(priv);
1180 IWL_ERR(priv, "Unable to initialize Rx queue\n");
1184 iwl3945_rx_queue_reset(priv, rxq);
1186 iwl3945_rx_replenish(priv);
1188 iwl3945_rx_init(priv, rxq);
1190 spin_lock_irqsave(&priv->lock, flags);
1192 /* Look at using this instead:
1193 rxq->need_update = 1;
1194 iwl3945_rx_queue_update_write_ptr(priv, rxq);
1197 rc = iwl_grab_nic_access(priv);
1199 spin_unlock_irqrestore(&priv->lock, flags);
1202 iwl_write_direct32(priv, FH39_RCSR_WPTR(0), rxq->write & ~7);
1203 iwl_release_nic_access(priv);
1205 spin_unlock_irqrestore(&priv->lock, flags);
1207 rc = iwl3945_txq_ctx_reset(priv);
1211 set_bit(STATUS_INIT, &priv->status);
1217 * iwl3945_hw_txq_ctx_free - Free TXQ Context
1219 * Destroy all TX DMA queues and structures
1221 void iwl3945_hw_txq_ctx_free(struct iwl_priv *priv)
1226 for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++)
1227 iwl3945_tx_queue_free(priv, &priv->txq39[txq_id]);
1230 void iwl3945_hw_txq_ctx_stop(struct iwl_priv *priv)
1233 unsigned long flags;
1235 spin_lock_irqsave(&priv->lock, flags);
1236 if (iwl_grab_nic_access(priv)) {
1237 spin_unlock_irqrestore(&priv->lock, flags);
1238 iwl3945_hw_txq_ctx_free(priv);
1243 iwl_write_prph(priv, ALM_SCD_MODE_REG, 0);
1245 /* reset TFD queues */
1246 for (txq_id = 0; txq_id < TFD_QUEUE_MAX; txq_id++) {
1247 iwl_write_direct32(priv, FH39_TCSR_CONFIG(txq_id), 0x0);
1248 iwl_poll_direct_bit(priv, FH39_TSSR_TX_STATUS,
1249 FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
1253 iwl_release_nic_access(priv);
1254 spin_unlock_irqrestore(&priv->lock, flags);
1256 iwl3945_hw_txq_ctx_free(priv);
1259 int iwl3945_hw_nic_stop_master(struct iwl_priv *priv)
1263 unsigned long flags;
1265 spin_lock_irqsave(&priv->lock, flags);
1267 /* set stop master bit */
1268 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1270 reg_val = iwl_read32(priv, CSR_GP_CNTRL);
1272 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
1273 (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
1274 IWL_DEBUG_INFO("Card in power save, master is already "
1277 rc = iwl_poll_direct_bit(priv, CSR_RESET,
1278 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1280 spin_unlock_irqrestore(&priv->lock, flags);
1285 spin_unlock_irqrestore(&priv->lock, flags);
1286 IWL_DEBUG_INFO("stop master\n");
1291 int iwl3945_hw_nic_reset(struct iwl_priv *priv)
1294 unsigned long flags;
1296 iwl3945_hw_nic_stop_master(priv);
1298 spin_lock_irqsave(&priv->lock, flags);
1300 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1302 iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
1303 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1305 rc = iwl_grab_nic_access(priv);
1307 iwl_write_prph(priv, APMG_CLK_CTRL_REG,
1308 APMG_CLK_VAL_BSM_CLK_RQT);
1312 iwl_set_bit(priv, CSR_GP_CNTRL,
1313 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1315 iwl_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1316 iwl_write_prph(priv, APMG_RTC_INT_STT_REG,
1320 iwl_write_prph(priv, APMG_CLK_EN_REG,
1321 APMG_CLK_VAL_DMA_CLK_RQT |
1322 APMG_CLK_VAL_BSM_CLK_RQT);
1325 iwl_set_bits_prph(priv, APMG_PS_CTRL_REG,
1326 APMG_PS_CTRL_VAL_RESET_REQ);
1328 iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1329 APMG_PS_CTRL_VAL_RESET_REQ);
1330 iwl_release_nic_access(priv);
1333 /* Clear the 'host command active' bit... */
1334 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1336 wake_up_interruptible(&priv->wait_command_queue);
1337 spin_unlock_irqrestore(&priv->lock, flags);
1343 * iwl3945_hw_reg_adjust_power_by_temp
1344 * return index delta into power gain settings table
1346 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1348 return (new_reading - old_reading) * (-11) / 100;
1352 * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1354 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1356 return ((temperature < -260) || (temperature > 25)) ? 1 : 0;
1359 int iwl3945_hw_get_temperature(struct iwl_priv *priv)
1361 return iwl_read32(priv, CSR_UCODE_DRV_GP2);
1365 * iwl3945_hw_reg_txpower_get_temperature
1366 * get the current temperature by reading from NIC
1368 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl_priv *priv)
1372 temperature = iwl3945_hw_get_temperature(priv);
1374 /* driver's okay range is -260 to +25.
1375 * human readable okay range is 0 to +285 */
1376 IWL_DEBUG_INFO("Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1378 /* handle insane temp reading */
1379 if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1380 IWL_ERR(priv, "Error bad temperature value %d\n", temperature);
1382 /* if really really hot(?),
1383 * substitute the 3rd band/group's temp measured at factory */
1384 if (priv->last_temperature > 100)
1385 temperature = priv->eeprom39.groups[2].temperature;
1386 else /* else use most recent "sane" value from driver */
1387 temperature = priv->last_temperature;
1390 return temperature; /* raw, not "human readable" */
1393 /* Adjust Txpower only if temperature variance is greater than threshold.
1395 * Both are lower than older versions' 9 degrees */
1396 #define IWL_TEMPERATURE_LIMIT_TIMER 6
1399 * is_temp_calib_needed - determines if new calibration is needed
1401 * records new temperature in tx_mgr->temperature.
1402 * replaces tx_mgr->last_temperature *only* if calib needed
1403 * (assumes caller will actually do the calibration!). */
1404 static int is_temp_calib_needed(struct iwl_priv *priv)
1408 priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1409 temp_diff = priv->temperature - priv->last_temperature;
1411 /* get absolute value */
1412 if (temp_diff < 0) {
1413 IWL_DEBUG_POWER("Getting cooler, delta %d,\n", temp_diff);
1414 temp_diff = -temp_diff;
1415 } else if (temp_diff == 0)
1416 IWL_DEBUG_POWER("Same temp,\n");
1418 IWL_DEBUG_POWER("Getting warmer, delta %d,\n", temp_diff);
1420 /* if we don't need calibration, *don't* update last_temperature */
1421 if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1422 IWL_DEBUG_POWER("Timed thermal calib not needed\n");
1426 IWL_DEBUG_POWER("Timed thermal calib needed\n");
1428 /* assume that caller will actually do calib ...
1429 * update the "last temperature" value */
1430 priv->last_temperature = priv->temperature;
1434 #define IWL_MAX_GAIN_ENTRIES 78
1435 #define IWL_CCK_FROM_OFDM_POWER_DIFF -5
1436 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1438 /* radio and DSP power table, each step is 1/2 dB.
1439 * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1440 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1442 {251, 127}, /* 2.4 GHz, highest power */
1519 {3, 95} }, /* 2.4 GHz, lowest power */
1521 {251, 127}, /* 5.x GHz, highest power */
1598 {3, 120} } /* 5.x GHz, lowest power */
1601 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1605 if (index >= IWL_MAX_GAIN_ENTRIES)
1606 return IWL_MAX_GAIN_ENTRIES - 1;
1610 /* Kick off thermal recalibration check every 60 seconds */
1611 #define REG_RECALIB_PERIOD (60)
1614 * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1616 * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1617 * or 6 Mbit (OFDM) rates.
1619 static void iwl3945_hw_reg_set_scan_power(struct iwl_priv *priv, u32 scan_tbl_index,
1620 s32 rate_index, const s8 *clip_pwrs,
1621 struct iwl_channel_info *ch_info,
1624 struct iwl3945_scan_power_info *scan_power_info;
1628 scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1630 /* use this channel group's 6Mbit clipping/saturation pwr,
1631 * but cap at regulatory scan power restriction (set during init
1632 * based on eeprom channel data) for this channel. */
1633 power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1635 /* further limit to user's max power preference.
1636 * FIXME: Other spectrum management power limitations do not
1637 * seem to apply?? */
1638 power = min(power, priv->user_txpower_limit);
1639 scan_power_info->requested_power = power;
1641 /* find difference between new scan *power* and current "normal"
1642 * Tx *power* for 6Mb. Use this difference (x2) to adjust the
1643 * current "normal" temperature-compensated Tx power *index* for
1644 * this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1646 power_index = ch_info->power_info[rate_index].power_table_index
1647 - (power - ch_info->power_info
1648 [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1650 /* store reference index that we use when adjusting *all* scan
1651 * powers. So we can accommodate user (all channel) or spectrum
1652 * management (single channel) power changes "between" temperature
1653 * feedback compensation procedures.
1654 * don't force fit this reference index into gain table; it may be a
1655 * negative number. This will help avoid errors when we're at
1656 * the lower bounds (highest gains, for warmest temperatures)
1659 /* don't exceed table bounds for "real" setting */
1660 power_index = iwl3945_hw_reg_fix_power_index(power_index);
1662 scan_power_info->power_table_index = power_index;
1663 scan_power_info->tpc.tx_gain =
1664 power_gain_table[band_index][power_index].tx_gain;
1665 scan_power_info->tpc.dsp_atten =
1666 power_gain_table[band_index][power_index].dsp_atten;
1670 * iwl3945_hw_reg_send_txpower - fill in Tx Power command with gain settings
1672 * Configures power settings for all rates for the current channel,
1673 * using values from channel info struct, and send to NIC
1675 int iwl3945_hw_reg_send_txpower(struct iwl_priv *priv)
1678 const struct iwl_channel_info *ch_info = NULL;
1679 struct iwl3945_txpowertable_cmd txpower = {
1680 .channel = priv->active39_rxon.channel,
1683 txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1684 ch_info = iwl3945_get_channel_info(priv,
1686 le16_to_cpu(priv->active39_rxon.channel));
1689 "Failed to get channel info for channel %d [%d]\n",
1690 le16_to_cpu(priv->active39_rxon.channel), priv->band);
1694 if (!is_channel_valid(ch_info)) {
1695 IWL_DEBUG_POWER("Not calling TX_PWR_TABLE_CMD on "
1696 "non-Tx channel.\n");
1700 /* fill cmd with power settings for all rates for current channel */
1701 /* Fill OFDM rate */
1702 for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1703 rate_idx <= IWL39_LAST_OFDM_RATE; rate_idx++, i++) {
1705 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1706 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1708 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1709 le16_to_cpu(txpower.channel),
1711 txpower.power[i].tpc.tx_gain,
1712 txpower.power[i].tpc.dsp_atten,
1713 txpower.power[i].rate);
1715 /* Fill CCK rates */
1716 for (rate_idx = IWL_FIRST_CCK_RATE;
1717 rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1718 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1719 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1721 IWL_DEBUG_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1722 le16_to_cpu(txpower.channel),
1724 txpower.power[i].tpc.tx_gain,
1725 txpower.power[i].tpc.dsp_atten,
1726 txpower.power[i].rate);
1729 return iwl3945_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1730 sizeof(struct iwl3945_txpowertable_cmd), &txpower);
1735 * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1736 * @ch_info: Channel to update. Uses power_info.requested_power.
1738 * Replace requested_power and base_power_index ch_info fields for
1741 * Called if user or spectrum management changes power preferences.
1742 * Takes into account h/w and modulation limitations (clip power).
1744 * This does *not* send anything to NIC, just sets up ch_info for one channel.
1746 * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1747 * properly fill out the scan powers, and actual h/w gain settings,
1748 * and send changes to NIC
1750 static int iwl3945_hw_reg_set_new_power(struct iwl_priv *priv,
1751 struct iwl_channel_info *ch_info)
1753 struct iwl3945_channel_power_info *power_info;
1754 int power_changed = 0;
1756 const s8 *clip_pwrs;
1759 /* Get this chnlgrp's rate-to-max/clip-powers table */
1760 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
1762 /* Get this channel's rate-to-current-power settings table */
1763 power_info = ch_info->power_info;
1765 /* update OFDM Txpower settings */
1766 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1767 i++, ++power_info) {
1770 /* limit new power to be no more than h/w capability */
1771 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1772 if (power == power_info->requested_power)
1775 /* find difference between old and new requested powers,
1776 * update base (non-temp-compensated) power index */
1777 delta_idx = (power - power_info->requested_power) * 2;
1778 power_info->base_power_index -= delta_idx;
1780 /* save new requested power value */
1781 power_info->requested_power = power;
1786 /* update CCK Txpower settings, based on OFDM 12M setting ...
1787 * ... all CCK power settings for a given channel are the *same*. */
1788 if (power_changed) {
1790 ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1791 requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1793 /* do all CCK rates' iwl3945_channel_power_info structures */
1794 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1795 power_info->requested_power = power;
1796 power_info->base_power_index =
1797 ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1798 base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1807 * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1809 * NOTE: Returned power limit may be less (but not more) than requested,
1810 * based strictly on regulatory (eeprom and spectrum mgt) limitations
1811 * (no consideration for h/w clipping limitations).
1813 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl_channel_info *ch_info)
1818 /* if we're using TGd limits, use lower of TGd or EEPROM */
1819 if (ch_info->tgd_data.max_power != 0)
1820 max_power = min(ch_info->tgd_data.max_power,
1821 ch_info->eeprom.max_power_avg);
1823 /* else just use EEPROM limits */
1826 max_power = ch_info->eeprom.max_power_avg;
1828 return min(max_power, ch_info->max_power_avg);
1832 * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1834 * Compensate txpower settings of *all* channels for temperature.
1835 * This only accounts for the difference between current temperature
1836 * and the factory calibration temperatures, and bases the new settings
1837 * on the channel's base_power_index.
1839 * If RxOn is "associated", this sends the new Txpower to NIC!
1841 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl_priv *priv)
1843 struct iwl_channel_info *ch_info = NULL;
1845 const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1851 int temperature = priv->temperature;
1853 /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1854 for (i = 0; i < priv->channel_count; i++) {
1855 ch_info = &priv->channel_info[i];
1856 a_band = is_channel_a_band(ch_info);
1858 /* Get this chnlgrp's factory calibration temperature */
1859 ref_temp = (s16)priv->eeprom39.groups[ch_info->group_index].
1862 /* get power index adjustment based on current and factory
1864 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
1867 /* set tx power value for all rates, OFDM and CCK */
1868 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
1871 ch_info->power_info[rate_index].base_power_index;
1873 /* temperature compensate */
1874 power_idx += delta_index;
1876 /* stay within table range */
1877 power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
1878 ch_info->power_info[rate_index].
1879 power_table_index = (u8) power_idx;
1880 ch_info->power_info[rate_index].tpc =
1881 power_gain_table[a_band][power_idx];
1884 /* Get this chnlgrp's rate-to-max/clip-powers table */
1885 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
1887 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1888 for (scan_tbl_index = 0;
1889 scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
1890 s32 actual_index = (scan_tbl_index == 0) ?
1891 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
1892 iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
1893 actual_index, clip_pwrs,
1898 /* send Txpower command for current channel to ucode */
1899 return iwl3945_hw_reg_send_txpower(priv);
1902 int iwl3945_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1904 struct iwl_channel_info *ch_info;
1909 if (priv->user_txpower_limit == power) {
1910 IWL_DEBUG_POWER("Requested Tx power same as current "
1911 "limit: %ddBm.\n", power);
1915 IWL_DEBUG_POWER("Setting upper limit clamp to %ddBm.\n", power);
1916 priv->user_txpower_limit = power;
1918 /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1920 for (i = 0; i < priv->channel_count; i++) {
1921 ch_info = &priv->channel_info[i];
1922 a_band = is_channel_a_band(ch_info);
1924 /* find minimum power of all user and regulatory constraints
1925 * (does not consider h/w clipping limitations) */
1926 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
1927 max_power = min(power, max_power);
1928 if (max_power != ch_info->curr_txpow) {
1929 ch_info->curr_txpow = max_power;
1931 /* this considers the h/w clipping limitations */
1932 iwl3945_hw_reg_set_new_power(priv, ch_info);
1936 /* update txpower settings for all channels,
1937 * send to NIC if associated. */
1938 is_temp_calib_needed(priv);
1939 iwl3945_hw_reg_comp_txpower_temp(priv);
1944 /* will add 3945 channel switch cmd handling later */
1945 int iwl3945_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1951 * iwl3945_reg_txpower_periodic - called when time to check our temperature.
1953 * -- reset periodic timer
1954 * -- see if temp has changed enough to warrant re-calibration ... if so:
1955 * -- correct coeffs for temp (can reset temp timer)
1956 * -- save this temp as "last",
1957 * -- send new set of gain settings to NIC
1958 * NOTE: This should continue working, even when we're not associated,
1959 * so we can keep our internal table of scan powers current. */
1960 void iwl3945_reg_txpower_periodic(struct iwl_priv *priv)
1962 /* This will kick in the "brute force"
1963 * iwl3945_hw_reg_comp_txpower_temp() below */
1964 if (!is_temp_calib_needed(priv))
1967 /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1968 * This is based *only* on current temperature,
1969 * ignoring any previous power measurements */
1970 iwl3945_hw_reg_comp_txpower_temp(priv);
1973 queue_delayed_work(priv->workqueue,
1974 &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
1977 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
1979 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1980 thermal_periodic.work);
1982 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1985 mutex_lock(&priv->mutex);
1986 iwl3945_reg_txpower_periodic(priv);
1987 mutex_unlock(&priv->mutex);
1991 * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
1994 * This function is used when initializing channel-info structs.
1996 * NOTE: These channel groups do *NOT* match the bands above!
1997 * These channel groups are based on factory-tested channels;
1998 * on A-band, EEPROM's "group frequency" entries represent the top
1999 * channel in each group 1-4. Group 5 All B/G channels are in group 0.
2001 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl_priv *priv,
2002 const struct iwl_channel_info *ch_info)
2004 struct iwl3945_eeprom_txpower_group *ch_grp = &priv->eeprom39.groups[0];
2006 u16 group_index = 0; /* based on factory calib frequencies */
2009 /* Find the group index for the channel ... don't use index 1(?) */
2010 if (is_channel_a_band(ch_info)) {
2011 for (group = 1; group < 5; group++) {
2012 grp_channel = ch_grp[group].group_channel;
2013 if (ch_info->channel <= grp_channel) {
2014 group_index = group;
2018 /* group 4 has a few channels *above* its factory cal freq */
2022 group_index = 0; /* 2.4 GHz, group 0 */
2024 IWL_DEBUG_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
2030 * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
2032 * Interpolate to get nominal (i.e. at factory calibration temperature) index
2033 * into radio/DSP gain settings table for requested power.
2035 static int iwl3945_hw_reg_get_matched_power_index(struct iwl_priv *priv,
2037 s32 setting_index, s32 *new_index)
2039 const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
2041 s32 power = 2 * requested_power;
2043 const struct iwl3945_eeprom_txpower_sample *samples;
2048 chnl_grp = &priv->eeprom39.groups[setting_index];
2049 samples = chnl_grp->samples;
2050 for (i = 0; i < 5; i++) {
2051 if (power == samples[i].power) {
2052 *new_index = samples[i].gain_index;
2057 if (power > samples[1].power) {
2060 } else if (power > samples[2].power) {
2063 } else if (power > samples[3].power) {
2071 denominator = (s32) samples[index1].power - (s32) samples[index0].power;
2072 if (denominator == 0)
2074 gains0 = (s32) samples[index0].gain_index * (1 << 19);
2075 gains1 = (s32) samples[index1].gain_index * (1 << 19);
2076 res = gains0 + (gains1 - gains0) *
2077 ((s32) power - (s32) samples[index0].power) / denominator +
2079 *new_index = res >> 19;
2083 static void iwl3945_hw_reg_init_channel_groups(struct iwl_priv *priv)
2087 const struct iwl3945_eeprom_txpower_group *group;
2089 IWL_DEBUG_POWER("Initializing factory calib info from EEPROM\n");
2091 for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
2092 s8 *clip_pwrs; /* table of power levels for each rate */
2093 s8 satur_pwr; /* saturation power for each chnl group */
2094 group = &priv->eeprom39.groups[i];
2096 /* sanity check on factory saturation power value */
2097 if (group->saturation_power < 40) {
2098 IWL_WARN(priv, "Error: saturation power is %d, "
2099 "less than minimum expected 40\n",
2100 group->saturation_power);
2105 * Derive requested power levels for each rate, based on
2106 * hardware capabilities (saturation power for band).
2107 * Basic value is 3dB down from saturation, with further
2108 * power reductions for highest 3 data rates. These
2109 * backoffs provide headroom for high rate modulation
2110 * power peaks, without too much distortion (clipping).
2112 /* we'll fill in this array with h/w max power levels */
2113 clip_pwrs = (s8 *) priv->clip39_groups[i].clip_powers;
2115 /* divide factory saturation power by 2 to find -3dB level */
2116 satur_pwr = (s8) (group->saturation_power >> 1);
2118 /* fill in channel group's nominal powers for each rate */
2119 for (rate_index = 0;
2120 rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
2121 switch (rate_index) {
2122 case IWL_RATE_36M_INDEX_TABLE:
2123 if (i == 0) /* B/G */
2124 *clip_pwrs = satur_pwr;
2126 *clip_pwrs = satur_pwr - 5;
2128 case IWL_RATE_48M_INDEX_TABLE:
2130 *clip_pwrs = satur_pwr - 7;
2132 *clip_pwrs = satur_pwr - 10;
2134 case IWL_RATE_54M_INDEX_TABLE:
2136 *clip_pwrs = satur_pwr - 9;
2138 *clip_pwrs = satur_pwr - 12;
2141 *clip_pwrs = satur_pwr;
2149 * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2151 * Second pass (during init) to set up priv->channel_info
2153 * Set up Tx-power settings in our channel info database for each VALID
2154 * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2155 * and current temperature.
2157 * Since this is based on current temperature (at init time), these values may
2158 * not be valid for very long, but it gives us a starting/default point,
2159 * and allows us to active (i.e. using Tx) scan.
2161 * This does *not* write values to NIC, just sets up our internal table.
2163 int iwl3945_txpower_set_from_eeprom(struct iwl_priv *priv)
2165 struct iwl_channel_info *ch_info = NULL;
2166 struct iwl3945_channel_power_info *pwr_info;
2170 const s8 *clip_pwrs; /* array of power levels for each rate */
2173 u8 pwr_index, base_pwr_index, a_band;
2177 /* save temperature reference,
2178 * so we can determine next time to calibrate */
2179 temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
2180 priv->last_temperature = temperature;
2182 iwl3945_hw_reg_init_channel_groups(priv);
2184 /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2185 for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
2187 a_band = is_channel_a_band(ch_info);
2188 if (!is_channel_valid(ch_info))
2191 /* find this channel's channel group (*not* "band") index */
2192 ch_info->group_index =
2193 iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
2195 /* Get this chnlgrp's rate->max/clip-powers table */
2196 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
2198 /* calculate power index *adjustment* value according to
2199 * diff between current temperature and factory temperature */
2200 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2201 priv->eeprom39.groups[ch_info->group_index].
2204 IWL_DEBUG_POWER("Delta index for channel %d: %d [%d]\n",
2205 ch_info->channel, delta_index, temperature +
2208 /* set tx power value for all OFDM rates */
2209 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2211 s32 uninitialized_var(power_idx);
2214 /* use channel group's clip-power table,
2215 * but don't exceed channel's max power */
2216 s8 pwr = min(ch_info->max_power_avg,
2217 clip_pwrs[rate_index]);
2219 pwr_info = &ch_info->power_info[rate_index];
2221 /* get base (i.e. at factory-measured temperature)
2222 * power table index for this rate's power */
2223 rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2224 ch_info->group_index,
2227 IWL_ERR(priv, "Invalid power index\n");
2230 pwr_info->base_power_index = (u8) power_idx;
2232 /* temperature compensate */
2233 power_idx += delta_index;
2235 /* stay within range of gain table */
2236 power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2238 /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2239 pwr_info->requested_power = pwr;
2240 pwr_info->power_table_index = (u8) power_idx;
2241 pwr_info->tpc.tx_gain =
2242 power_gain_table[a_band][power_idx].tx_gain;
2243 pwr_info->tpc.dsp_atten =
2244 power_gain_table[a_band][power_idx].dsp_atten;
2247 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2248 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2249 power = pwr_info->requested_power +
2250 IWL_CCK_FROM_OFDM_POWER_DIFF;
2251 pwr_index = pwr_info->power_table_index +
2252 IWL_CCK_FROM_OFDM_INDEX_DIFF;
2253 base_pwr_index = pwr_info->base_power_index +
2254 IWL_CCK_FROM_OFDM_INDEX_DIFF;
2256 /* stay within table range */
2257 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2258 gain = power_gain_table[a_band][pwr_index].tx_gain;
2259 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2261 /* fill each CCK rate's iwl3945_channel_power_info structure
2262 * NOTE: All CCK-rate Txpwrs are the same for a given chnl!
2263 * NOTE: CCK rates start at end of OFDM rates! */
2264 for (rate_index = 0;
2265 rate_index < IWL_CCK_RATES; rate_index++) {
2266 pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2267 pwr_info->requested_power = power;
2268 pwr_info->power_table_index = pwr_index;
2269 pwr_info->base_power_index = base_pwr_index;
2270 pwr_info->tpc.tx_gain = gain;
2271 pwr_info->tpc.dsp_atten = dsp_atten;
2274 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2275 for (scan_tbl_index = 0;
2276 scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2277 s32 actual_index = (scan_tbl_index == 0) ?
2278 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2279 iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2280 actual_index, clip_pwrs, ch_info, a_band);
2287 int iwl3945_hw_rxq_stop(struct iwl_priv *priv)
2290 unsigned long flags;
2292 spin_lock_irqsave(&priv->lock, flags);
2293 rc = iwl_grab_nic_access(priv);
2295 spin_unlock_irqrestore(&priv->lock, flags);
2299 iwl_write_direct32(priv, FH39_RCSR_CONFIG(0), 0);
2300 rc = iwl_poll_direct_bit(priv, FH39_RSSR_STATUS,
2301 FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
2303 IWL_ERR(priv, "Can't stop Rx DMA.\n");
2305 iwl_release_nic_access(priv);
2306 spin_unlock_irqrestore(&priv->lock, flags);
2311 int iwl3945_hw_tx_queue_init(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
2314 unsigned long flags;
2315 int txq_id = txq->q.id;
2317 struct iwl3945_shared *shared_data = priv->shared_virt;
2319 shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2321 spin_lock_irqsave(&priv->lock, flags);
2322 rc = iwl_grab_nic_access(priv);
2324 spin_unlock_irqrestore(&priv->lock, flags);
2327 iwl_write_direct32(priv, FH39_CBCC_CTRL(txq_id), 0);
2328 iwl_write_direct32(priv, FH39_CBCC_BASE(txq_id), 0);
2330 iwl_write_direct32(priv, FH39_TCSR_CONFIG(txq_id),
2331 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2332 FH39_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2333 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2334 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2335 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2336 iwl_release_nic_access(priv);
2338 /* fake read to flush all prev. writes */
2339 iwl_read32(priv, FH39_TSSR_CBB_BASE);
2340 spin_unlock_irqrestore(&priv->lock, flags);
2345 int iwl3945_hw_get_rx_read(struct iwl_priv *priv)
2347 struct iwl3945_shared *shared_data = priv->shared_virt;
2349 return le32_to_cpu(shared_data->rx_read_ptr[0]);
2353 * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2355 int iwl3945_init_hw_rate_table(struct iwl_priv *priv)
2357 int rc, i, index, prev_index;
2358 struct iwl3945_rate_scaling_cmd rate_cmd = {
2359 .reserved = {0, 0, 0},
2361 struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2363 for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2364 index = iwl3945_rates[i].table_rs_index;
2366 table[index].rate_n_flags =
2367 iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2368 table[index].try_cnt = priv->retry_rate;
2369 prev_index = iwl3945_get_prev_ieee_rate(i);
2370 table[index].next_rate_index =
2371 iwl3945_rates[prev_index].table_rs_index;
2374 switch (priv->band) {
2375 case IEEE80211_BAND_5GHZ:
2376 IWL_DEBUG_RATE("Select A mode rate scale\n");
2377 /* If one of the following CCK rates is used,
2378 * have it fall back to the 6M OFDM rate */
2379 for (i = IWL_RATE_1M_INDEX_TABLE;
2380 i <= IWL_RATE_11M_INDEX_TABLE; i++)
2381 table[i].next_rate_index =
2382 iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2384 /* Don't fall back to CCK rates */
2385 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index =
2386 IWL_RATE_9M_INDEX_TABLE;
2388 /* Don't drop out of OFDM rates */
2389 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2390 iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2393 case IEEE80211_BAND_2GHZ:
2394 IWL_DEBUG_RATE("Select B/G mode rate scale\n");
2395 /* If an OFDM rate is used, have it fall back to the
2398 if (!(priv->sta_supp_rates & IWL_OFDM_RATES_MASK) &&
2399 iwl3945_is_associated(priv)) {
2401 index = IWL_FIRST_CCK_RATE;
2402 for (i = IWL_RATE_6M_INDEX_TABLE;
2403 i <= IWL_RATE_54M_INDEX_TABLE; i++)
2404 table[i].next_rate_index =
2405 iwl3945_rates[index].table_rs_index;
2407 index = IWL_RATE_11M_INDEX_TABLE;
2408 /* CCK shouldn't fall back to OFDM... */
2409 table[index].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2418 /* Update the rate scaling for control frame Tx */
2419 rate_cmd.table_id = 0;
2420 rc = iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2425 /* Update the rate scaling for data frame Tx */
2426 rate_cmd.table_id = 1;
2427 return iwl3945_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2431 /* Called when initializing driver */
2432 int iwl3945_hw_set_hw_params(struct iwl_priv *priv)
2434 memset((void *)&priv->hw_params, 0,
2435 sizeof(struct iwl_hw_params));
2438 pci_alloc_consistent(priv->pci_dev,
2439 sizeof(struct iwl3945_shared),
2440 &priv->shared_phys);
2442 if (!priv->shared_virt) {
2443 IWL_ERR(priv, "failed to allocate pci memory\n");
2444 mutex_unlock(&priv->mutex);
2448 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE;
2449 priv->hw_params.max_pkt_size = 2342;
2450 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2451 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2452 priv->hw_params.max_stations = IWL3945_STATION_COUNT;
2453 priv->hw_params.bcast_sta_id = IWL3945_BROADCAST_ID;
2455 priv->hw_params.tx_ant_num = 2;
2459 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl_priv *priv,
2460 struct iwl3945_frame *frame, u8 rate)
2462 struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2463 unsigned int frame_size;
2465 tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2466 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2468 tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
2469 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2471 frame_size = iwl3945_fill_beacon_frame(priv,
2472 tx_beacon_cmd->frame,
2473 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2475 BUG_ON(frame_size > MAX_MPDU_SIZE);
2476 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2478 tx_beacon_cmd->tx.rate = rate;
2479 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2480 TX_CMD_FLG_TSF_MSK);
2482 /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2483 tx_beacon_cmd->tx.supp_rates[0] =
2484 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2486 tx_beacon_cmd->tx.supp_rates[1] =
2487 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2489 return sizeof(struct iwl3945_tx_beacon_cmd) + frame_size;
2492 void iwl3945_hw_rx_handler_setup(struct iwl_priv *priv)
2494 priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
2495 priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2498 void iwl3945_hw_setup_deferred_work(struct iwl_priv *priv)
2500 INIT_DELAYED_WORK(&priv->thermal_periodic,
2501 iwl3945_bg_reg_txpower_periodic);
2504 void iwl3945_hw_cancel_deferred_work(struct iwl_priv *priv)
2506 cancel_delayed_work(&priv->thermal_periodic);
2509 static struct iwl_cfg iwl3945_bg_cfg = {
2511 .fw_name_pre = IWL3945_FW_PRE,
2512 .ucode_api_max = IWL3945_UCODE_API_MAX,
2513 .ucode_api_min = IWL3945_UCODE_API_MIN,
2517 static struct iwl_cfg iwl3945_abg_cfg = {
2519 .fw_name_pre = IWL3945_FW_PRE,
2520 .ucode_api_max = IWL3945_UCODE_API_MAX,
2521 .ucode_api_min = IWL3945_UCODE_API_MIN,
2522 .sku = IWL_SKU_A|IWL_SKU_G,
2525 struct pci_device_id iwl3945_hw_card_ids[] = {
2526 {IWL_PCI_DEVICE(0x4222, 0x1005, iwl3945_bg_cfg)},
2527 {IWL_PCI_DEVICE(0x4222, 0x1034, iwl3945_bg_cfg)},
2528 {IWL_PCI_DEVICE(0x4222, 0x1044, iwl3945_bg_cfg)},
2529 {IWL_PCI_DEVICE(0x4227, 0x1014, iwl3945_bg_cfg)},
2530 {IWL_PCI_DEVICE(0x4222, PCI_ANY_ID, iwl3945_abg_cfg)},
2531 {IWL_PCI_DEVICE(0x4227, PCI_ANY_ID, iwl3945_abg_cfg)},
2535 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);