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[deliverable/linux.git] / drivers / net / wireless / iwlegacy / iwl-3945.c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4 *
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.
8 *
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
12 * more details.
13 *
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
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * Intel Linux Wireless <ilw@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/delay.h>
34 #include <linux/sched.h>
35 #include <linux/skbuff.h>
36 #include <linux/netdevice.h>
37 #include <linux/firmware.h>
38 #include <linux/etherdevice.h>
39 #include <asm/unaligned.h>
40 #include <net/mac80211.h>
41
42 #include "iwl-fh.h"
43 #include "iwl-3945-fh.h"
44 #include "iwl-commands.h"
45 #include "iwl-sta.h"
46 #include "iwl-3945.h"
47 #include "iwl-eeprom.h"
48 #include "iwl-core.h"
49 #include "iwl-helpers.h"
50 #include "iwl-led.h"
51 #include "iwl-3945-led.h"
52 #include "iwl-3945-debugfs.h"
53
54 #define IL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np) \
55 [IL_RATE_##r##M_INDEX] = { IL_RATE_##r##M_PLCP, \
56 IL_RATE_##r##M_IEEE, \
57 IL_RATE_##ip##M_INDEX, \
58 IL_RATE_##in##M_INDEX, \
59 IL_RATE_##rp##M_INDEX, \
60 IL_RATE_##rn##M_INDEX, \
61 IL_RATE_##pp##M_INDEX, \
62 IL_RATE_##np##M_INDEX, \
63 IL_RATE_##r##M_INDEX_TABLE, \
64 IL_RATE_##ip##M_INDEX_TABLE }
65
66 /*
67 * Parameter order:
68 * rate, prev rate, next rate, prev tgg rate, next tgg rate
69 *
70 * If there isn't a valid next or previous rate then INV is used which
71 * maps to IL_RATE_INVALID
72 *
73 */
74 const struct il3945_rate_info il3945_rates[IL_RATE_COUNT_3945] = {
75 IL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2), /* 1mbps */
76 IL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5), /* 2mbps */
77 IL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11), /*5.5mbps */
78 IL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18), /* 11mbps */
79 IL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11), /* 6mbps */
80 IL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11), /* 9mbps */
81 IL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18), /* 12mbps */
82 IL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24), /* 18mbps */
83 IL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36), /* 24mbps */
84 IL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48), /* 36mbps */
85 IL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54), /* 48mbps */
86 IL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
87 };
88
89 static inline u8 il3945_get_prev_ieee_rate(u8 rate_index)
90 {
91 u8 rate = il3945_rates[rate_index].prev_ieee;
92
93 if (rate == IL_RATE_INVALID)
94 rate = rate_index;
95 return rate;
96 }
97
98 /* 1 = enable the il3945_disable_events() function */
99 #define IL_EVT_DISABLE (0)
100 #define IL_EVT_DISABLE_SIZE (1532/32)
101
102 /**
103 * il3945_disable_events - Disable selected events in uCode event log
104 *
105 * Disable an event by writing "1"s into "disable"
106 * bitmap in SRAM. Bit position corresponds to Event # (id/type).
107 * Default values of 0 enable uCode events to be logged.
108 * Use for only special debugging. This function is just a placeholder as-is,
109 * you'll need to provide the special bits! ...
110 * ... and set IL_EVT_DISABLE to 1. */
111 void il3945_disable_events(struct il_priv *il)
112 {
113 int i;
114 u32 base; /* SRAM address of event log header */
115 u32 disable_ptr; /* SRAM address of event-disable bitmap array */
116 u32 array_size; /* # of u32 entries in array */
117 static const u32 evt_disable[IL_EVT_DISABLE_SIZE] = {
118 0x00000000, /* 31 - 0 Event id numbers */
119 0x00000000, /* 63 - 32 */
120 0x00000000, /* 95 - 64 */
121 0x00000000, /* 127 - 96 */
122 0x00000000, /* 159 - 128 */
123 0x00000000, /* 191 - 160 */
124 0x00000000, /* 223 - 192 */
125 0x00000000, /* 255 - 224 */
126 0x00000000, /* 287 - 256 */
127 0x00000000, /* 319 - 288 */
128 0x00000000, /* 351 - 320 */
129 0x00000000, /* 383 - 352 */
130 0x00000000, /* 415 - 384 */
131 0x00000000, /* 447 - 416 */
132 0x00000000, /* 479 - 448 */
133 0x00000000, /* 511 - 480 */
134 0x00000000, /* 543 - 512 */
135 0x00000000, /* 575 - 544 */
136 0x00000000, /* 607 - 576 */
137 0x00000000, /* 639 - 608 */
138 0x00000000, /* 671 - 640 */
139 0x00000000, /* 703 - 672 */
140 0x00000000, /* 735 - 704 */
141 0x00000000, /* 767 - 736 */
142 0x00000000, /* 799 - 768 */
143 0x00000000, /* 831 - 800 */
144 0x00000000, /* 863 - 832 */
145 0x00000000, /* 895 - 864 */
146 0x00000000, /* 927 - 896 */
147 0x00000000, /* 959 - 928 */
148 0x00000000, /* 991 - 960 */
149 0x00000000, /* 1023 - 992 */
150 0x00000000, /* 1055 - 1024 */
151 0x00000000, /* 1087 - 1056 */
152 0x00000000, /* 1119 - 1088 */
153 0x00000000, /* 1151 - 1120 */
154 0x00000000, /* 1183 - 1152 */
155 0x00000000, /* 1215 - 1184 */
156 0x00000000, /* 1247 - 1216 */
157 0x00000000, /* 1279 - 1248 */
158 0x00000000, /* 1311 - 1280 */
159 0x00000000, /* 1343 - 1312 */
160 0x00000000, /* 1375 - 1344 */
161 0x00000000, /* 1407 - 1376 */
162 0x00000000, /* 1439 - 1408 */
163 0x00000000, /* 1471 - 1440 */
164 0x00000000, /* 1503 - 1472 */
165 };
166
167 base = le32_to_cpu(il->card_alive.log_event_table_ptr);
168 if (!il3945_hw_valid_rtc_data_addr(base)) {
169 IL_ERR("Invalid event log pointer 0x%08X\n", base);
170 return;
171 }
172
173 disable_ptr = il_read_targ_mem(il, base + (4 * sizeof(u32)));
174 array_size = il_read_targ_mem(il, base + (5 * sizeof(u32)));
175
176 if (IL_EVT_DISABLE && array_size == IL_EVT_DISABLE_SIZE) {
177 D_INFO("Disabling selected uCode log events at 0x%x\n",
178 disable_ptr);
179 for (i = 0; i < IL_EVT_DISABLE_SIZE; i++)
180 il_write_targ_mem(il,
181 disable_ptr + (i * sizeof(u32)),
182 evt_disable[i]);
183
184 } else {
185 D_INFO("Selected uCode log events may be disabled\n");
186 D_INFO(" by writing \"1\"s into disable bitmap\n");
187 D_INFO(" in SRAM at 0x%x, size %d u32s\n",
188 disable_ptr, array_size);
189 }
190
191 }
192
193 static int il3945_hwrate_to_plcp_idx(u8 plcp)
194 {
195 int idx;
196
197 for (idx = 0; idx < IL_RATE_COUNT_3945; idx++)
198 if (il3945_rates[idx].plcp == plcp)
199 return idx;
200 return -1;
201 }
202
203 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
204 #define TX_STATUS_ENTRY(x) case TX_3945_STATUS_FAIL_ ## x: return #x
205
206 static const char *il3945_get_tx_fail_reason(u32 status)
207 {
208 switch (status & TX_STATUS_MSK) {
209 case TX_3945_STATUS_SUCCESS:
210 return "SUCCESS";
211 TX_STATUS_ENTRY(SHORT_LIMIT);
212 TX_STATUS_ENTRY(LONG_LIMIT);
213 TX_STATUS_ENTRY(FIFO_UNDERRUN);
214 TX_STATUS_ENTRY(MGMNT_ABORT);
215 TX_STATUS_ENTRY(NEXT_FRAG);
216 TX_STATUS_ENTRY(LIFE_EXPIRE);
217 TX_STATUS_ENTRY(DEST_PS);
218 TX_STATUS_ENTRY(ABORTED);
219 TX_STATUS_ENTRY(BT_RETRY);
220 TX_STATUS_ENTRY(STA_INVALID);
221 TX_STATUS_ENTRY(FRAG_DROPPED);
222 TX_STATUS_ENTRY(TID_DISABLE);
223 TX_STATUS_ENTRY(FRAME_FLUSHED);
224 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
225 TX_STATUS_ENTRY(TX_LOCKED);
226 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
227 }
228
229 return "UNKNOWN";
230 }
231 #else
232 static inline const char *il3945_get_tx_fail_reason(u32 status)
233 {
234 return "";
235 }
236 #endif
237
238 /*
239 * get ieee prev rate from rate scale table.
240 * for A and B mode we need to overright prev
241 * value
242 */
243 int il3945_rs_next_rate(struct il_priv *il, int rate)
244 {
245 int next_rate = il3945_get_prev_ieee_rate(rate);
246
247 switch (il->band) {
248 case IEEE80211_BAND_5GHZ:
249 if (rate == IL_RATE_12M_INDEX)
250 next_rate = IL_RATE_9M_INDEX;
251 else if (rate == IL_RATE_6M_INDEX)
252 next_rate = IL_RATE_6M_INDEX;
253 break;
254 case IEEE80211_BAND_2GHZ:
255 if (!(il->_3945.sta_supp_rates & IL_OFDM_RATES_MASK) &&
256 il_is_associated(il, IL_RXON_CTX_BSS)) {
257 if (rate == IL_RATE_11M_INDEX)
258 next_rate = IL_RATE_5M_INDEX;
259 }
260 break;
261
262 default:
263 break;
264 }
265
266 return next_rate;
267 }
268
269
270 /**
271 * il3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
272 *
273 * When FW advances 'R' index, all entries between old and new 'R' index
274 * need to be reclaimed. As result, some free space forms. If there is
275 * enough free space (> low mark), wake the stack that feeds us.
276 */
277 static void il3945_tx_queue_reclaim(struct il_priv *il,
278 int txq_id, int index)
279 {
280 struct il_tx_queue *txq = &il->txq[txq_id];
281 struct il_queue *q = &txq->q;
282 struct il_tx_info *tx_info;
283
284 BUG_ON(txq_id == IWL39_CMD_QUEUE_NUM);
285
286 for (index = il_queue_inc_wrap(index, q->n_bd);
287 q->read_ptr != index;
288 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
289
290 tx_info = &txq->txb[txq->q.read_ptr];
291 ieee80211_tx_status_irqsafe(il->hw, tx_info->skb);
292 tx_info->skb = NULL;
293 il->cfg->ops->lib->txq_free_tfd(il, txq);
294 }
295
296 if (il_queue_space(q) > q->low_mark && txq_id >= 0 &&
297 txq_id != IWL39_CMD_QUEUE_NUM && il->mac80211_registered)
298 il_wake_queue(il, txq);
299 }
300
301 /**
302 * il3945_rx_reply_tx - Handle Tx response
303 */
304 static void il3945_rx_reply_tx(struct il_priv *il,
305 struct il_rx_mem_buffer *rxb)
306 {
307 struct il_rx_packet *pkt = rxb_addr(rxb);
308 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
309 int txq_id = SEQ_TO_QUEUE(sequence);
310 int index = SEQ_TO_INDEX(sequence);
311 struct il_tx_queue *txq = &il->txq[txq_id];
312 struct ieee80211_tx_info *info;
313 struct il3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
314 u32 status = le32_to_cpu(tx_resp->status);
315 int rate_idx;
316 int fail;
317
318 if (index >= txq->q.n_bd || il_queue_used(&txq->q, index) == 0) {
319 IL_ERR("Read index for DMA queue txq_id (%d) index %d "
320 "is out of range [0-%d] %d %d\n", txq_id,
321 index, txq->q.n_bd, txq->q.write_ptr,
322 txq->q.read_ptr);
323 return;
324 }
325
326 txq->time_stamp = jiffies;
327 info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb);
328 ieee80211_tx_info_clear_status(info);
329
330 /* Fill the MRR chain with some info about on-chip retransmissions */
331 rate_idx = il3945_hwrate_to_plcp_idx(tx_resp->rate);
332 if (info->band == IEEE80211_BAND_5GHZ)
333 rate_idx -= IL_FIRST_OFDM_RATE;
334
335 fail = tx_resp->failure_frame;
336
337 info->status.rates[0].idx = rate_idx;
338 info->status.rates[0].count = fail + 1; /* add final attempt */
339
340 /* tx_status->rts_retry_count = tx_resp->failure_rts; */
341 info->flags |= ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
342 IEEE80211_TX_STAT_ACK : 0;
343
344 D_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
345 txq_id, il3945_get_tx_fail_reason(status), status,
346 tx_resp->rate, tx_resp->failure_frame);
347
348 D_TX_REPLY("Tx queue reclaim %d\n", index);
349 il3945_tx_queue_reclaim(il, txq_id, index);
350
351 if (status & TX_ABORT_REQUIRED_MSK)
352 IL_ERR("TODO: Implement Tx ABORT REQUIRED!!!\n");
353 }
354
355
356
357 /*****************************************************************************
358 *
359 * Intel PRO/Wireless 3945ABG/BG Network Connection
360 *
361 * RX handler implementations
362 *
363 *****************************************************************************/
364 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
365 static void il3945_accumulative_statistics(struct il_priv *il,
366 __le32 *stats)
367 {
368 int i;
369 __le32 *prev_stats;
370 u32 *accum_stats;
371 u32 *delta, *max_delta;
372
373 prev_stats = (__le32 *)&il->_3945.statistics;
374 accum_stats = (u32 *)&il->_3945.accum_statistics;
375 delta = (u32 *)&il->_3945.delta_statistics;
376 max_delta = (u32 *)&il->_3945.max_delta;
377
378 for (i = sizeof(__le32); i < sizeof(struct il3945_notif_statistics);
379 i += sizeof(__le32), stats++, prev_stats++, delta++,
380 max_delta++, accum_stats++) {
381 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
382 *delta = (le32_to_cpu(*stats) -
383 le32_to_cpu(*prev_stats));
384 *accum_stats += *delta;
385 if (*delta > *max_delta)
386 *max_delta = *delta;
387 }
388 }
389
390 /* reset accumulative statistics for "no-counter" type statistics */
391 il->_3945.accum_statistics.general.temperature =
392 il->_3945.statistics.general.temperature;
393 il->_3945.accum_statistics.general.ttl_timestamp =
394 il->_3945.statistics.general.ttl_timestamp;
395 }
396 #endif
397
398 void il3945_hw_rx_statistics(struct il_priv *il,
399 struct il_rx_mem_buffer *rxb)
400 {
401 struct il_rx_packet *pkt = rxb_addr(rxb);
402
403 D_RX("Statistics notification received (%d vs %d).\n",
404 (int)sizeof(struct il3945_notif_statistics),
405 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
406 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
407 il3945_accumulative_statistics(il, (__le32 *)&pkt->u.raw);
408 #endif
409
410 memcpy(&il->_3945.statistics, pkt->u.raw, sizeof(il->_3945.statistics));
411 }
412
413 void il3945_reply_statistics(struct il_priv *il,
414 struct il_rx_mem_buffer *rxb)
415 {
416 struct il_rx_packet *pkt = rxb_addr(rxb);
417 __le32 *flag = (__le32 *)&pkt->u.raw;
418
419 if (le32_to_cpu(*flag) & UCODE_STATISTICS_CLEAR_MSK) {
420 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
421 memset(&il->_3945.accum_statistics, 0,
422 sizeof(struct il3945_notif_statistics));
423 memset(&il->_3945.delta_statistics, 0,
424 sizeof(struct il3945_notif_statistics));
425 memset(&il->_3945.max_delta, 0,
426 sizeof(struct il3945_notif_statistics));
427 #endif
428 D_RX("Statistics have been cleared\n");
429 }
430 il3945_hw_rx_statistics(il, rxb);
431 }
432
433
434 /******************************************************************************
435 *
436 * Misc. internal state and helper functions
437 *
438 ******************************************************************************/
439
440 /* This is necessary only for a number of statistics, see the caller. */
441 static int il3945_is_network_packet(struct il_priv *il,
442 struct ieee80211_hdr *header)
443 {
444 /* Filter incoming packets to determine if they are targeted toward
445 * this network, discarding packets coming from ourselves */
446 switch (il->iw_mode) {
447 case NL80211_IFTYPE_ADHOC: /* Header: Dest. | Source | BSSID */
448 /* packets to our IBSS update information */
449 return !compare_ether_addr(header->addr3, il->bssid);
450 case NL80211_IFTYPE_STATION: /* Header: Dest. | AP{BSSID} | Source */
451 /* packets to our IBSS update information */
452 return !compare_ether_addr(header->addr2, il->bssid);
453 default:
454 return 1;
455 }
456 }
457
458 static void il3945_pass_packet_to_mac80211(struct il_priv *il,
459 struct il_rx_mem_buffer *rxb,
460 struct ieee80211_rx_status *stats)
461 {
462 struct il_rx_packet *pkt = rxb_addr(rxb);
463 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)IL_RX_DATA(pkt);
464 struct il3945_rx_frame_hdr *rx_hdr = IL_RX_HDR(pkt);
465 struct il3945_rx_frame_end *rx_end = IL_RX_END(pkt);
466 u16 len = le16_to_cpu(rx_hdr->len);
467 struct sk_buff *skb;
468 __le16 fc = hdr->frame_control;
469
470 /* We received data from the HW, so stop the watchdog */
471 if (unlikely(len + IWL39_RX_FRAME_SIZE >
472 PAGE_SIZE << il->hw_params.rx_page_order)) {
473 D_DROP("Corruption detected!\n");
474 return;
475 }
476
477 /* We only process data packets if the interface is open */
478 if (unlikely(!il->is_open)) {
479 D_DROP(
480 "Dropping packet while interface is not open.\n");
481 return;
482 }
483
484 skb = dev_alloc_skb(128);
485 if (!skb) {
486 IL_ERR("dev_alloc_skb failed\n");
487 return;
488 }
489
490 if (!il3945_mod_params.sw_crypto)
491 il_set_decrypted_flag(il,
492 (struct ieee80211_hdr *)rxb_addr(rxb),
493 le32_to_cpu(rx_end->status), stats);
494
495 skb_add_rx_frag(skb, 0, rxb->page,
496 (void *)rx_hdr->payload - (void *)pkt, len);
497
498 il_update_stats(il, false, fc, len);
499 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
500
501 ieee80211_rx(il->hw, skb);
502 il->alloc_rxb_page--;
503 rxb->page = NULL;
504 }
505
506 #define IL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
507
508 static void il3945_rx_reply_rx(struct il_priv *il,
509 struct il_rx_mem_buffer *rxb)
510 {
511 struct ieee80211_hdr *header;
512 struct ieee80211_rx_status rx_status;
513 struct il_rx_packet *pkt = rxb_addr(rxb);
514 struct il3945_rx_frame_stats *rx_stats = IL_RX_STATS(pkt);
515 struct il3945_rx_frame_hdr *rx_hdr = IL_RX_HDR(pkt);
516 struct il3945_rx_frame_end *rx_end = IL_RX_END(pkt);
517 u16 rx_stats_sig_avg __maybe_unused = le16_to_cpu(rx_stats->sig_avg);
518 u16 rx_stats_noise_diff __maybe_unused = le16_to_cpu(rx_stats->noise_diff);
519 u8 network_packet;
520
521 rx_status.flag = 0;
522 rx_status.mactime = le64_to_cpu(rx_end->timestamp);
523 rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
524 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
525 rx_status.freq =
526 ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel),
527 rx_status.band);
528
529 rx_status.rate_idx = il3945_hwrate_to_plcp_idx(rx_hdr->rate);
530 if (rx_status.band == IEEE80211_BAND_5GHZ)
531 rx_status.rate_idx -= IL_FIRST_OFDM_RATE;
532
533 rx_status.antenna = (le16_to_cpu(rx_hdr->phy_flags) &
534 RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
535
536 /* set the preamble flag if appropriate */
537 if (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
538 rx_status.flag |= RX_FLAG_SHORTPRE;
539
540 if ((unlikely(rx_stats->phy_count > 20))) {
541 D_DROP("dsp size out of range [0,20]: %d/n",
542 rx_stats->phy_count);
543 return;
544 }
545
546 if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR) ||
547 !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
548 D_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
549 return;
550 }
551
552
553
554 /* Convert 3945's rssi indicator to dBm */
555 rx_status.signal = rx_stats->rssi - IWL39_RSSI_OFFSET;
556
557 D_STATS("Rssi %d sig_avg %d noise_diff %d\n",
558 rx_status.signal, rx_stats_sig_avg,
559 rx_stats_noise_diff);
560
561 header = (struct ieee80211_hdr *)IL_RX_DATA(pkt);
562
563 network_packet = il3945_is_network_packet(il, header);
564
565 D_STATS("[%c] %d RSSI:%d Signal:%u, Rate:%u\n",
566 network_packet ? '*' : ' ',
567 le16_to_cpu(rx_hdr->channel),
568 rx_status.signal, rx_status.signal,
569 rx_status.rate_idx);
570
571 il_dbg_log_rx_data_frame(il, le16_to_cpu(rx_hdr->len),
572 header);
573
574 if (network_packet) {
575 il->_3945.last_beacon_time =
576 le32_to_cpu(rx_end->beacon_timestamp);
577 il->_3945.last_tsf = le64_to_cpu(rx_end->timestamp);
578 il->_3945.last_rx_rssi = rx_status.signal;
579 }
580
581 il3945_pass_packet_to_mac80211(il, rxb, &rx_status);
582 }
583
584 int il3945_hw_txq_attach_buf_to_tfd(struct il_priv *il,
585 struct il_tx_queue *txq,
586 dma_addr_t addr, u16 len, u8 reset, u8 pad)
587 {
588 int count;
589 struct il_queue *q;
590 struct il3945_tfd *tfd, *tfd_tmp;
591
592 q = &txq->q;
593 tfd_tmp = (struct il3945_tfd *)txq->tfds;
594 tfd = &tfd_tmp[q->write_ptr];
595
596 if (reset)
597 memset(tfd, 0, sizeof(*tfd));
598
599 count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
600
601 if (count >= NUM_TFD_CHUNKS || count < 0) {
602 IL_ERR("Error can not send more than %d chunks\n",
603 NUM_TFD_CHUNKS);
604 return -EINVAL;
605 }
606
607 tfd->tbs[count].addr = cpu_to_le32(addr);
608 tfd->tbs[count].len = cpu_to_le32(len);
609
610 count++;
611
612 tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
613 TFD_CTL_PAD_SET(pad));
614
615 return 0;
616 }
617
618 /**
619 * il3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
620 *
621 * Does NOT advance any indexes
622 */
623 void il3945_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
624 {
625 struct il3945_tfd *tfd_tmp = (struct il3945_tfd *)txq->tfds;
626 int index = txq->q.read_ptr;
627 struct il3945_tfd *tfd = &tfd_tmp[index];
628 struct pci_dev *dev = il->pci_dev;
629 int i;
630 int counter;
631
632 /* sanity check */
633 counter = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
634 if (counter > NUM_TFD_CHUNKS) {
635 IL_ERR("Too many chunks: %i\n", counter);
636 /* @todo issue fatal error, it is quite serious situation */
637 return;
638 }
639
640 /* Unmap tx_cmd */
641 if (counter)
642 pci_unmap_single(dev,
643 dma_unmap_addr(&txq->meta[index], mapping),
644 dma_unmap_len(&txq->meta[index], len),
645 PCI_DMA_TODEVICE);
646
647 /* unmap chunks if any */
648
649 for (i = 1; i < counter; i++)
650 pci_unmap_single(dev, le32_to_cpu(tfd->tbs[i].addr),
651 le32_to_cpu(tfd->tbs[i].len), PCI_DMA_TODEVICE);
652
653 /* free SKB */
654 if (txq->txb) {
655 struct sk_buff *skb;
656
657 skb = txq->txb[txq->q.read_ptr].skb;
658
659 /* can be called from irqs-disabled context */
660 if (skb) {
661 dev_kfree_skb_any(skb);
662 txq->txb[txq->q.read_ptr].skb = NULL;
663 }
664 }
665 }
666
667 /**
668 * il3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
669 *
670 */
671 void il3945_hw_build_tx_cmd_rate(struct il_priv *il,
672 struct il_device_cmd *cmd,
673 struct ieee80211_tx_info *info,
674 struct ieee80211_hdr *hdr,
675 int sta_id, int tx_id)
676 {
677 u16 hw_value = ieee80211_get_tx_rate(il->hw, info)->hw_value;
678 u16 rate_index = min(hw_value & 0xffff, IL_RATE_COUNT_3945);
679 u16 rate_mask;
680 int rate;
681 u8 rts_retry_limit;
682 u8 data_retry_limit;
683 __le32 tx_flags;
684 __le16 fc = hdr->frame_control;
685 struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
686
687 rate = il3945_rates[rate_index].plcp;
688 tx_flags = tx_cmd->tx_flags;
689
690 /* We need to figure out how to get the sta->supp_rates while
691 * in this running context */
692 rate_mask = IL_RATES_MASK_3945;
693
694 /* Set retry limit on DATA packets and Probe Responses*/
695 if (ieee80211_is_probe_resp(fc))
696 data_retry_limit = 3;
697 else
698 data_retry_limit = IL_DEFAULT_TX_RETRY;
699 tx_cmd->data_retry_limit = data_retry_limit;
700
701 if (tx_id >= IWL39_CMD_QUEUE_NUM)
702 rts_retry_limit = 3;
703 else
704 rts_retry_limit = 7;
705
706 if (data_retry_limit < rts_retry_limit)
707 rts_retry_limit = data_retry_limit;
708 tx_cmd->rts_retry_limit = rts_retry_limit;
709
710 tx_cmd->rate = rate;
711 tx_cmd->tx_flags = tx_flags;
712
713 /* OFDM */
714 tx_cmd->supp_rates[0] =
715 ((rate_mask & IL_OFDM_RATES_MASK) >> IL_FIRST_OFDM_RATE) & 0xFF;
716
717 /* CCK */
718 tx_cmd->supp_rates[1] = (rate_mask & 0xF);
719
720 D_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
721 "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
722 tx_cmd->rate, le32_to_cpu(tx_cmd->tx_flags),
723 tx_cmd->supp_rates[1], tx_cmd->supp_rates[0]);
724 }
725
726 static u8 il3945_sync_sta(struct il_priv *il, int sta_id, u16 tx_rate)
727 {
728 unsigned long flags_spin;
729 struct il_station_entry *station;
730
731 if (sta_id == IL_INVALID_STATION)
732 return IL_INVALID_STATION;
733
734 spin_lock_irqsave(&il->sta_lock, flags_spin);
735 station = &il->stations[sta_id];
736
737 station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
738 station->sta.rate_n_flags = cpu_to_le16(tx_rate);
739 station->sta.mode = STA_CONTROL_MODIFY_MSK;
740 il_send_add_sta(il, &station->sta, CMD_ASYNC);
741 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
742
743 D_RATE("SCALE sync station %d to rate %d\n",
744 sta_id, tx_rate);
745 return sta_id;
746 }
747
748 static void il3945_set_pwr_vmain(struct il_priv *il)
749 {
750 /*
751 * (for documentation purposes)
752 * to set power to V_AUX, do
753
754 if (pci_pme_capable(il->pci_dev, PCI_D3cold)) {
755 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
756 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
757 ~APMG_PS_CTRL_MSK_PWR_SRC);
758
759 _il_poll_bit(il, CSR_GPIO_IN,
760 CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
761 CSR_GPIO_IN_BIT_AUX_POWER, 5000);
762 }
763 */
764
765 il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
766 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
767 ~APMG_PS_CTRL_MSK_PWR_SRC);
768
769 _il_poll_bit(il, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
770 CSR_GPIO_IN_BIT_AUX_POWER, 5000); /* uS */
771 }
772
773 static int il3945_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
774 {
775 il_wr(il, FH39_RCSR_RBD_BASE(0), rxq->bd_dma);
776 il_wr(il, FH39_RCSR_RPTR_ADDR(0),
777 rxq->rb_stts_dma);
778 il_wr(il, FH39_RCSR_WPTR(0), 0);
779 il_wr(il, FH39_RCSR_CONFIG(0),
780 FH39_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
781 FH39_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
782 FH39_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
783 FH39_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
784 (RX_QUEUE_SIZE_LOG << FH39_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
785 FH39_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
786 (1 << FH39_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
787 FH39_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
788
789 /* fake read to flush all prev I/O */
790 il_rd(il, FH39_RSSR_CTRL);
791
792 return 0;
793 }
794
795 static int il3945_tx_reset(struct il_priv *il)
796 {
797
798 /* bypass mode */
799 il_wr_prph(il, ALM_SCD_MODE_REG, 0x2);
800
801 /* RA 0 is active */
802 il_wr_prph(il, ALM_SCD_ARASTAT_REG, 0x01);
803
804 /* all 6 fifo are active */
805 il_wr_prph(il, ALM_SCD_TXFACT_REG, 0x3f);
806
807 il_wr_prph(il, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
808 il_wr_prph(il, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
809 il_wr_prph(il, ALM_SCD_TXF4MF_REG, 0x000004);
810 il_wr_prph(il, ALM_SCD_TXF5MF_REG, 0x000005);
811
812 il_wr(il, FH39_TSSR_CBB_BASE,
813 il->_3945.shared_phys);
814
815 il_wr(il, FH39_TSSR_MSG_CONFIG,
816 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
817 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
818 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
819 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
820 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
821 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
822 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
823
824
825 return 0;
826 }
827
828 /**
829 * il3945_txq_ctx_reset - Reset TX queue context
830 *
831 * Destroys all DMA structures and initialize them again
832 */
833 static int il3945_txq_ctx_reset(struct il_priv *il)
834 {
835 int rc;
836 int txq_id, slots_num;
837
838 il3945_hw_txq_ctx_free(il);
839
840 /* allocate tx queue structure */
841 rc = il_alloc_txq_mem(il);
842 if (rc)
843 return rc;
844
845 /* Tx CMD queue */
846 rc = il3945_tx_reset(il);
847 if (rc)
848 goto error;
849
850 /* Tx queue(s) */
851 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
852 slots_num = (txq_id == IWL39_CMD_QUEUE_NUM) ?
853 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
854 rc = il_tx_queue_init(il, &il->txq[txq_id],
855 slots_num, txq_id);
856 if (rc) {
857 IL_ERR("Tx %d queue init failed\n", txq_id);
858 goto error;
859 }
860 }
861
862 return rc;
863
864 error:
865 il3945_hw_txq_ctx_free(il);
866 return rc;
867 }
868
869
870 /*
871 * Start up 3945's basic functionality after it has been reset
872 * (e.g. after platform boot, or shutdown via il_apm_stop())
873 * NOTE: This does not load uCode nor start the embedded processor
874 */
875 static int il3945_apm_init(struct il_priv *il)
876 {
877 int ret = il_apm_init(il);
878
879 /* Clear APMG (NIC's internal power management) interrupts */
880 il_wr_prph(il, APMG_RTC_INT_MSK_REG, 0x0);
881 il_wr_prph(il, APMG_RTC_INT_STT_REG, 0xFFFFFFFF);
882
883 /* Reset radio chip */
884 il_set_bits_prph(il, APMG_PS_CTRL_REG,
885 APMG_PS_CTRL_VAL_RESET_REQ);
886 udelay(5);
887 il_clear_bits_prph(il, APMG_PS_CTRL_REG,
888 APMG_PS_CTRL_VAL_RESET_REQ);
889
890 return ret;
891 }
892
893 static void il3945_nic_config(struct il_priv *il)
894 {
895 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
896 unsigned long flags;
897 u8 rev_id = il->pci_dev->revision;
898
899 spin_lock_irqsave(&il->lock, flags);
900
901 /* Determine HW type */
902 D_INFO("HW Revision ID = 0x%X\n", rev_id);
903
904 if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
905 D_INFO("RTP type\n");
906 else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
907 D_INFO("3945 RADIO-MB type\n");
908 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
909 CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
910 } else {
911 D_INFO("3945 RADIO-MM type\n");
912 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
913 CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
914 }
915
916 if (EEPROM_SKU_CAP_OP_MODE_MRC == eeprom->sku_cap) {
917 D_INFO("SKU OP mode is mrc\n");
918 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
919 CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
920 } else
921 D_INFO("SKU OP mode is basic\n");
922
923 if ((eeprom->board_revision & 0xF0) == 0xD0) {
924 D_INFO("3945ABG revision is 0x%X\n",
925 eeprom->board_revision);
926 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
927 CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
928 } else {
929 D_INFO("3945ABG revision is 0x%X\n",
930 eeprom->board_revision);
931 il_clear_bit(il, CSR_HW_IF_CONFIG_REG,
932 CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
933 }
934
935 if (eeprom->almgor_m_version <= 1) {
936 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
937 CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
938 D_INFO("Card M type A version is 0x%X\n",
939 eeprom->almgor_m_version);
940 } else {
941 D_INFO("Card M type B version is 0x%X\n",
942 eeprom->almgor_m_version);
943 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
944 CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
945 }
946 spin_unlock_irqrestore(&il->lock, flags);
947
948 if (eeprom->sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
949 D_RF_KILL("SW RF KILL supported in EEPROM.\n");
950
951 if (eeprom->sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
952 D_RF_KILL("HW RF KILL supported in EEPROM.\n");
953 }
954
955 int il3945_hw_nic_init(struct il_priv *il)
956 {
957 int rc;
958 unsigned long flags;
959 struct il_rx_queue *rxq = &il->rxq;
960
961 spin_lock_irqsave(&il->lock, flags);
962 il->cfg->ops->lib->apm_ops.init(il);
963 spin_unlock_irqrestore(&il->lock, flags);
964
965 il3945_set_pwr_vmain(il);
966
967 il->cfg->ops->lib->apm_ops.config(il);
968
969 /* Allocate the RX queue, or reset if it is already allocated */
970 if (!rxq->bd) {
971 rc = il_rx_queue_alloc(il);
972 if (rc) {
973 IL_ERR("Unable to initialize Rx queue\n");
974 return -ENOMEM;
975 }
976 } else
977 il3945_rx_queue_reset(il, rxq);
978
979 il3945_rx_replenish(il);
980
981 il3945_rx_init(il, rxq);
982
983
984 /* Look at using this instead:
985 rxq->need_update = 1;
986 il_rx_queue_update_write_ptr(il, rxq);
987 */
988
989 il_wr(il, FH39_RCSR_WPTR(0), rxq->write & ~7);
990
991 rc = il3945_txq_ctx_reset(il);
992 if (rc)
993 return rc;
994
995 set_bit(STATUS_INIT, &il->status);
996
997 return 0;
998 }
999
1000 /**
1001 * il3945_hw_txq_ctx_free - Free TXQ Context
1002 *
1003 * Destroy all TX DMA queues and structures
1004 */
1005 void il3945_hw_txq_ctx_free(struct il_priv *il)
1006 {
1007 int txq_id;
1008
1009 /* Tx queues */
1010 if (il->txq)
1011 for (txq_id = 0; txq_id < il->hw_params.max_txq_num;
1012 txq_id++)
1013 if (txq_id == IWL39_CMD_QUEUE_NUM)
1014 il_cmd_queue_free(il);
1015 else
1016 il_tx_queue_free(il, txq_id);
1017
1018 /* free tx queue structure */
1019 il_txq_mem(il);
1020 }
1021
1022 void il3945_hw_txq_ctx_stop(struct il_priv *il)
1023 {
1024 int txq_id;
1025
1026 /* stop SCD */
1027 il_wr_prph(il, ALM_SCD_MODE_REG, 0);
1028 il_wr_prph(il, ALM_SCD_TXFACT_REG, 0);
1029
1030 /* reset TFD queues */
1031 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
1032 il_wr(il, FH39_TCSR_CONFIG(txq_id), 0x0);
1033 il_poll_bit(il, FH39_TSSR_TX_STATUS,
1034 FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
1035 1000);
1036 }
1037
1038 il3945_hw_txq_ctx_free(il);
1039 }
1040
1041 /**
1042 * il3945_hw_reg_adjust_power_by_temp
1043 * return index delta into power gain settings table
1044 */
1045 static int il3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1046 {
1047 return (new_reading - old_reading) * (-11) / 100;
1048 }
1049
1050 /**
1051 * il3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1052 */
1053 static inline int il3945_hw_reg_temp_out_of_range(int temperature)
1054 {
1055 return (temperature < -260 || temperature > 25) ? 1 : 0;
1056 }
1057
1058 int il3945_hw_get_temperature(struct il_priv *il)
1059 {
1060 return _il_rd(il, CSR_UCODE_DRV_GP2);
1061 }
1062
1063 /**
1064 * il3945_hw_reg_txpower_get_temperature
1065 * get the current temperature by reading from NIC
1066 */
1067 static int il3945_hw_reg_txpower_get_temperature(struct il_priv *il)
1068 {
1069 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1070 int temperature;
1071
1072 temperature = il3945_hw_get_temperature(il);
1073
1074 /* driver's okay range is -260 to +25.
1075 * human readable okay range is 0 to +285 */
1076 D_INFO("Temperature: %d\n", temperature + IL_TEMP_CONVERT);
1077
1078 /* handle insane temp reading */
1079 if (il3945_hw_reg_temp_out_of_range(temperature)) {
1080 IL_ERR("Error bad temperature value %d\n", temperature);
1081
1082 /* if really really hot(?),
1083 * substitute the 3rd band/group's temp measured at factory */
1084 if (il->last_temperature > 100)
1085 temperature = eeprom->groups[2].temperature;
1086 else /* else use most recent "sane" value from driver */
1087 temperature = il->last_temperature;
1088 }
1089
1090 return temperature; /* raw, not "human readable" */
1091 }
1092
1093 /* Adjust Txpower only if temperature variance is greater than threshold.
1094 *
1095 * Both are lower than older versions' 9 degrees */
1096 #define IL_TEMPERATURE_LIMIT_TIMER 6
1097
1098 /**
1099 * il3945_is_temp_calib_needed - determines if new calibration is needed
1100 *
1101 * records new temperature in tx_mgr->temperature.
1102 * replaces tx_mgr->last_temperature *only* if calib needed
1103 * (assumes caller will actually do the calibration!). */
1104 static int il3945_is_temp_calib_needed(struct il_priv *il)
1105 {
1106 int temp_diff;
1107
1108 il->temperature = il3945_hw_reg_txpower_get_temperature(il);
1109 temp_diff = il->temperature - il->last_temperature;
1110
1111 /* get absolute value */
1112 if (temp_diff < 0) {
1113 D_POWER("Getting cooler, delta %d,\n", temp_diff);
1114 temp_diff = -temp_diff;
1115 } else if (temp_diff == 0)
1116 D_POWER("Same temp,\n");
1117 else
1118 D_POWER("Getting warmer, delta %d,\n", temp_diff);
1119
1120 /* if we don't need calibration, *don't* update last_temperature */
1121 if (temp_diff < IL_TEMPERATURE_LIMIT_TIMER) {
1122 D_POWER("Timed thermal calib not needed\n");
1123 return 0;
1124 }
1125
1126 D_POWER("Timed thermal calib needed\n");
1127
1128 /* assume that caller will actually do calib ...
1129 * update the "last temperature" value */
1130 il->last_temperature = il->temperature;
1131 return 1;
1132 }
1133
1134 #define IL_MAX_GAIN_ENTRIES 78
1135 #define IL_CCK_FROM_OFDM_POWER_DIFF -5
1136 #define IL_CCK_FROM_OFDM_INDEX_DIFF (10)
1137
1138 /* radio and DSP power table, each step is 1/2 dB.
1139 * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1140 static struct il3945_tx_power power_gain_table[2][IL_MAX_GAIN_ENTRIES] = {
1141 {
1142 {251, 127}, /* 2.4 GHz, highest power */
1143 {251, 127},
1144 {251, 127},
1145 {251, 127},
1146 {251, 125},
1147 {251, 110},
1148 {251, 105},
1149 {251, 98},
1150 {187, 125},
1151 {187, 115},
1152 {187, 108},
1153 {187, 99},
1154 {243, 119},
1155 {243, 111},
1156 {243, 105},
1157 {243, 97},
1158 {243, 92},
1159 {211, 106},
1160 {211, 100},
1161 {179, 120},
1162 {179, 113},
1163 {179, 107},
1164 {147, 125},
1165 {147, 119},
1166 {147, 112},
1167 {147, 106},
1168 {147, 101},
1169 {147, 97},
1170 {147, 91},
1171 {115, 107},
1172 {235, 121},
1173 {235, 115},
1174 {235, 109},
1175 {203, 127},
1176 {203, 121},
1177 {203, 115},
1178 {203, 108},
1179 {203, 102},
1180 {203, 96},
1181 {203, 92},
1182 {171, 110},
1183 {171, 104},
1184 {171, 98},
1185 {139, 116},
1186 {227, 125},
1187 {227, 119},
1188 {227, 113},
1189 {227, 107},
1190 {227, 101},
1191 {227, 96},
1192 {195, 113},
1193 {195, 106},
1194 {195, 102},
1195 {195, 95},
1196 {163, 113},
1197 {163, 106},
1198 {163, 102},
1199 {163, 95},
1200 {131, 113},
1201 {131, 106},
1202 {131, 102},
1203 {131, 95},
1204 {99, 113},
1205 {99, 106},
1206 {99, 102},
1207 {99, 95},
1208 {67, 113},
1209 {67, 106},
1210 {67, 102},
1211 {67, 95},
1212 {35, 113},
1213 {35, 106},
1214 {35, 102},
1215 {35, 95},
1216 {3, 113},
1217 {3, 106},
1218 {3, 102},
1219 {3, 95} }, /* 2.4 GHz, lowest power */
1220 {
1221 {251, 127}, /* 5.x GHz, highest power */
1222 {251, 120},
1223 {251, 114},
1224 {219, 119},
1225 {219, 101},
1226 {187, 113},
1227 {187, 102},
1228 {155, 114},
1229 {155, 103},
1230 {123, 117},
1231 {123, 107},
1232 {123, 99},
1233 {123, 92},
1234 {91, 108},
1235 {59, 125},
1236 {59, 118},
1237 {59, 109},
1238 {59, 102},
1239 {59, 96},
1240 {59, 90},
1241 {27, 104},
1242 {27, 98},
1243 {27, 92},
1244 {115, 118},
1245 {115, 111},
1246 {115, 104},
1247 {83, 126},
1248 {83, 121},
1249 {83, 113},
1250 {83, 105},
1251 {83, 99},
1252 {51, 118},
1253 {51, 111},
1254 {51, 104},
1255 {51, 98},
1256 {19, 116},
1257 {19, 109},
1258 {19, 102},
1259 {19, 98},
1260 {19, 93},
1261 {171, 113},
1262 {171, 107},
1263 {171, 99},
1264 {139, 120},
1265 {139, 113},
1266 {139, 107},
1267 {139, 99},
1268 {107, 120},
1269 {107, 113},
1270 {107, 107},
1271 {107, 99},
1272 {75, 120},
1273 {75, 113},
1274 {75, 107},
1275 {75, 99},
1276 {43, 120},
1277 {43, 113},
1278 {43, 107},
1279 {43, 99},
1280 {11, 120},
1281 {11, 113},
1282 {11, 107},
1283 {11, 99},
1284 {131, 107},
1285 {131, 99},
1286 {99, 120},
1287 {99, 113},
1288 {99, 107},
1289 {99, 99},
1290 {67, 120},
1291 {67, 113},
1292 {67, 107},
1293 {67, 99},
1294 {35, 120},
1295 {35, 113},
1296 {35, 107},
1297 {35, 99},
1298 {3, 120} } /* 5.x GHz, lowest power */
1299 };
1300
1301 static inline u8 il3945_hw_reg_fix_power_index(int index)
1302 {
1303 if (index < 0)
1304 return 0;
1305 if (index >= IL_MAX_GAIN_ENTRIES)
1306 return IL_MAX_GAIN_ENTRIES - 1;
1307 return (u8) index;
1308 }
1309
1310 /* Kick off thermal recalibration check every 60 seconds */
1311 #define REG_RECALIB_PERIOD (60)
1312
1313 /**
1314 * il3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1315 *
1316 * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1317 * or 6 Mbit (OFDM) rates.
1318 */
1319 static void il3945_hw_reg_set_scan_power(struct il_priv *il, u32 scan_tbl_index,
1320 s32 rate_index, const s8 *clip_pwrs,
1321 struct il_channel_info *ch_info,
1322 int band_index)
1323 {
1324 struct il3945_scan_power_info *scan_power_info;
1325 s8 power;
1326 u8 power_index;
1327
1328 scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1329
1330 /* use this channel group's 6Mbit clipping/saturation pwr,
1331 * but cap at regulatory scan power restriction (set during init
1332 * based on eeprom channel data) for this channel. */
1333 power = min(ch_info->scan_power, clip_pwrs[IL_RATE_6M_INDEX_TABLE]);
1334
1335 power = min(power, il->tx_power_user_lmt);
1336 scan_power_info->requested_power = power;
1337
1338 /* find difference between new scan *power* and current "normal"
1339 * Tx *power* for 6Mb. Use this difference (x2) to adjust the
1340 * current "normal" temperature-compensated Tx power *index* for
1341 * this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1342 * *index*. */
1343 power_index = ch_info->power_info[rate_index].power_table_index
1344 - (power - ch_info->power_info
1345 [IL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1346
1347 /* store reference index that we use when adjusting *all* scan
1348 * powers. So we can accommodate user (all channel) or spectrum
1349 * management (single channel) power changes "between" temperature
1350 * feedback compensation procedures.
1351 * don't force fit this reference index into gain table; it may be a
1352 * negative number. This will help avoid errors when we're at
1353 * the lower bounds (highest gains, for warmest temperatures)
1354 * of the table. */
1355
1356 /* don't exceed table bounds for "real" setting */
1357 power_index = il3945_hw_reg_fix_power_index(power_index);
1358
1359 scan_power_info->power_table_index = power_index;
1360 scan_power_info->tpc.tx_gain =
1361 power_gain_table[band_index][power_index].tx_gain;
1362 scan_power_info->tpc.dsp_atten =
1363 power_gain_table[band_index][power_index].dsp_atten;
1364 }
1365
1366 /**
1367 * il3945_send_tx_power - fill in Tx Power command with gain settings
1368 *
1369 * Configures power settings for all rates for the current channel,
1370 * using values from channel info struct, and send to NIC
1371 */
1372 static int il3945_send_tx_power(struct il_priv *il)
1373 {
1374 int rate_idx, i;
1375 const struct il_channel_info *ch_info = NULL;
1376 struct il3945_txpowertable_cmd txpower = {
1377 .channel = il->contexts[IL_RXON_CTX_BSS].active.channel,
1378 };
1379 u16 chan;
1380
1381 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &il->status),
1382 "TX Power requested while scanning!\n"))
1383 return -EAGAIN;
1384
1385 chan = le16_to_cpu(il->contexts[IL_RXON_CTX_BSS].active.channel);
1386
1387 txpower.band = (il->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1388 ch_info = il_get_channel_info(il, il->band, chan);
1389 if (!ch_info) {
1390 IL_ERR(
1391 "Failed to get channel info for channel %d [%d]\n",
1392 chan, il->band);
1393 return -EINVAL;
1394 }
1395
1396 if (!il_is_channel_valid(ch_info)) {
1397 D_POWER("Not calling TX_PWR_TABLE_CMD on "
1398 "non-Tx channel.\n");
1399 return 0;
1400 }
1401
1402 /* fill cmd with power settings for all rates for current channel */
1403 /* Fill OFDM rate */
1404 for (rate_idx = IL_FIRST_OFDM_RATE, i = 0;
1405 rate_idx <= IWL39_LAST_OFDM_RATE; rate_idx++, i++) {
1406
1407 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1408 txpower.power[i].rate = il3945_rates[rate_idx].plcp;
1409
1410 D_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1411 le16_to_cpu(txpower.channel),
1412 txpower.band,
1413 txpower.power[i].tpc.tx_gain,
1414 txpower.power[i].tpc.dsp_atten,
1415 txpower.power[i].rate);
1416 }
1417 /* Fill CCK rates */
1418 for (rate_idx = IL_FIRST_CCK_RATE;
1419 rate_idx <= IL_LAST_CCK_RATE; rate_idx++, i++) {
1420 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1421 txpower.power[i].rate = il3945_rates[rate_idx].plcp;
1422
1423 D_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1424 le16_to_cpu(txpower.channel),
1425 txpower.band,
1426 txpower.power[i].tpc.tx_gain,
1427 txpower.power[i].tpc.dsp_atten,
1428 txpower.power[i].rate);
1429 }
1430
1431 return il_send_cmd_pdu(il, REPLY_TX_PWR_TABLE_CMD,
1432 sizeof(struct il3945_txpowertable_cmd),
1433 &txpower);
1434
1435 }
1436
1437 /**
1438 * il3945_hw_reg_set_new_power - Configures power tables at new levels
1439 * @ch_info: Channel to update. Uses power_info.requested_power.
1440 *
1441 * Replace requested_power and base_power_index ch_info fields for
1442 * one channel.
1443 *
1444 * Called if user or spectrum management changes power preferences.
1445 * Takes into account h/w and modulation limitations (clip power).
1446 *
1447 * This does *not* send anything to NIC, just sets up ch_info for one channel.
1448 *
1449 * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1450 * properly fill out the scan powers, and actual h/w gain settings,
1451 * and send changes to NIC
1452 */
1453 static int il3945_hw_reg_set_new_power(struct il_priv *il,
1454 struct il_channel_info *ch_info)
1455 {
1456 struct il3945_channel_power_info *power_info;
1457 int power_changed = 0;
1458 int i;
1459 const s8 *clip_pwrs;
1460 int power;
1461
1462 /* Get this chnlgrp's rate-to-max/clip-powers table */
1463 clip_pwrs = il->_3945.clip_groups[ch_info->group_index].clip_powers;
1464
1465 /* Get this channel's rate-to-current-power settings table */
1466 power_info = ch_info->power_info;
1467
1468 /* update OFDM Txpower settings */
1469 for (i = IL_RATE_6M_INDEX_TABLE; i <= IL_RATE_54M_INDEX_TABLE;
1470 i++, ++power_info) {
1471 int delta_idx;
1472
1473 /* limit new power to be no more than h/w capability */
1474 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1475 if (power == power_info->requested_power)
1476 continue;
1477
1478 /* find difference between old and new requested powers,
1479 * update base (non-temp-compensated) power index */
1480 delta_idx = (power - power_info->requested_power) * 2;
1481 power_info->base_power_index -= delta_idx;
1482
1483 /* save new requested power value */
1484 power_info->requested_power = power;
1485
1486 power_changed = 1;
1487 }
1488
1489 /* update CCK Txpower settings, based on OFDM 12M setting ...
1490 * ... all CCK power settings for a given channel are the *same*. */
1491 if (power_changed) {
1492 power =
1493 ch_info->power_info[IL_RATE_12M_INDEX_TABLE].
1494 requested_power + IL_CCK_FROM_OFDM_POWER_DIFF;
1495
1496 /* do all CCK rates' il3945_channel_power_info structures */
1497 for (i = IL_RATE_1M_INDEX_TABLE; i <= IL_RATE_11M_INDEX_TABLE; i++) {
1498 power_info->requested_power = power;
1499 power_info->base_power_index =
1500 ch_info->power_info[IL_RATE_12M_INDEX_TABLE].
1501 base_power_index + IL_CCK_FROM_OFDM_INDEX_DIFF;
1502 ++power_info;
1503 }
1504 }
1505
1506 return 0;
1507 }
1508
1509 /**
1510 * il3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1511 *
1512 * NOTE: Returned power limit may be less (but not more) than requested,
1513 * based strictly on regulatory (eeprom and spectrum mgt) limitations
1514 * (no consideration for h/w clipping limitations).
1515 */
1516 static int il3945_hw_reg_get_ch_txpower_limit(struct il_channel_info *ch_info)
1517 {
1518 s8 max_power;
1519
1520 #if 0
1521 /* if we're using TGd limits, use lower of TGd or EEPROM */
1522 if (ch_info->tgd_data.max_power != 0)
1523 max_power = min(ch_info->tgd_data.max_power,
1524 ch_info->eeprom.max_power_avg);
1525
1526 /* else just use EEPROM limits */
1527 else
1528 #endif
1529 max_power = ch_info->eeprom.max_power_avg;
1530
1531 return min(max_power, ch_info->max_power_avg);
1532 }
1533
1534 /**
1535 * il3945_hw_reg_comp_txpower_temp - Compensate for temperature
1536 *
1537 * Compensate txpower settings of *all* channels for temperature.
1538 * This only accounts for the difference between current temperature
1539 * and the factory calibration temperatures, and bases the new settings
1540 * on the channel's base_power_index.
1541 *
1542 * If RxOn is "associated", this sends the new Txpower to NIC!
1543 */
1544 static int il3945_hw_reg_comp_txpower_temp(struct il_priv *il)
1545 {
1546 struct il_channel_info *ch_info = NULL;
1547 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1548 int delta_index;
1549 const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1550 u8 a_band;
1551 u8 rate_index;
1552 u8 scan_tbl_index;
1553 u8 i;
1554 int ref_temp;
1555 int temperature = il->temperature;
1556
1557 if (il->disable_tx_power_cal ||
1558 test_bit(STATUS_SCANNING, &il->status)) {
1559 /* do not perform tx power calibration */
1560 return 0;
1561 }
1562 /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1563 for (i = 0; i < il->channel_count; i++) {
1564 ch_info = &il->channel_info[i];
1565 a_band = il_is_channel_a_band(ch_info);
1566
1567 /* Get this chnlgrp's factory calibration temperature */
1568 ref_temp = (s16)eeprom->groups[ch_info->group_index].
1569 temperature;
1570
1571 /* get power index adjustment based on current and factory
1572 * temps */
1573 delta_index = il3945_hw_reg_adjust_power_by_temp(temperature,
1574 ref_temp);
1575
1576 /* set tx power value for all rates, OFDM and CCK */
1577 for (rate_index = 0; rate_index < IL_RATE_COUNT_3945;
1578 rate_index++) {
1579 int power_idx =
1580 ch_info->power_info[rate_index].base_power_index;
1581
1582 /* temperature compensate */
1583 power_idx += delta_index;
1584
1585 /* stay within table range */
1586 power_idx = il3945_hw_reg_fix_power_index(power_idx);
1587 ch_info->power_info[rate_index].
1588 power_table_index = (u8) power_idx;
1589 ch_info->power_info[rate_index].tpc =
1590 power_gain_table[a_band][power_idx];
1591 }
1592
1593 /* Get this chnlgrp's rate-to-max/clip-powers table */
1594 clip_pwrs = il->_3945.clip_groups[ch_info->group_index].clip_powers;
1595
1596 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1597 for (scan_tbl_index = 0;
1598 scan_tbl_index < IL_NUM_SCAN_RATES; scan_tbl_index++) {
1599 s32 actual_index = (scan_tbl_index == 0) ?
1600 IL_RATE_1M_INDEX_TABLE : IL_RATE_6M_INDEX_TABLE;
1601 il3945_hw_reg_set_scan_power(il, scan_tbl_index,
1602 actual_index, clip_pwrs,
1603 ch_info, a_band);
1604 }
1605 }
1606
1607 /* send Txpower command for current channel to ucode */
1608 return il->cfg->ops->lib->send_tx_power(il);
1609 }
1610
1611 int il3945_hw_reg_set_txpower(struct il_priv *il, s8 power)
1612 {
1613 struct il_channel_info *ch_info;
1614 s8 max_power;
1615 u8 a_band;
1616 u8 i;
1617
1618 if (il->tx_power_user_lmt == power) {
1619 D_POWER("Requested Tx power same as current "
1620 "limit: %ddBm.\n", power);
1621 return 0;
1622 }
1623
1624 D_POWER("Setting upper limit clamp to %ddBm.\n", power);
1625 il->tx_power_user_lmt = power;
1626
1627 /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1628
1629 for (i = 0; i < il->channel_count; i++) {
1630 ch_info = &il->channel_info[i];
1631 a_band = il_is_channel_a_band(ch_info);
1632
1633 /* find minimum power of all user and regulatory constraints
1634 * (does not consider h/w clipping limitations) */
1635 max_power = il3945_hw_reg_get_ch_txpower_limit(ch_info);
1636 max_power = min(power, max_power);
1637 if (max_power != ch_info->curr_txpow) {
1638 ch_info->curr_txpow = max_power;
1639
1640 /* this considers the h/w clipping limitations */
1641 il3945_hw_reg_set_new_power(il, ch_info);
1642 }
1643 }
1644
1645 /* update txpower settings for all channels,
1646 * send to NIC if associated. */
1647 il3945_is_temp_calib_needed(il);
1648 il3945_hw_reg_comp_txpower_temp(il);
1649
1650 return 0;
1651 }
1652
1653 static int il3945_send_rxon_assoc(struct il_priv *il,
1654 struct il_rxon_context *ctx)
1655 {
1656 int rc = 0;
1657 struct il_rx_packet *pkt;
1658 struct il3945_rxon_assoc_cmd rxon_assoc;
1659 struct il_host_cmd cmd = {
1660 .id = REPLY_RXON_ASSOC,
1661 .len = sizeof(rxon_assoc),
1662 .flags = CMD_WANT_SKB,
1663 .data = &rxon_assoc,
1664 };
1665 const struct il_rxon_cmd *rxon1 = &ctx->staging;
1666 const struct il_rxon_cmd *rxon2 = &ctx->active;
1667
1668 if (rxon1->flags == rxon2->flags &&
1669 rxon1->filter_flags == rxon2->filter_flags &&
1670 rxon1->cck_basic_rates == rxon2->cck_basic_rates &&
1671 rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates) {
1672 D_INFO("Using current RXON_ASSOC. Not resending.\n");
1673 return 0;
1674 }
1675
1676 rxon_assoc.flags = ctx->staging.flags;
1677 rxon_assoc.filter_flags = ctx->staging.filter_flags;
1678 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
1679 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
1680 rxon_assoc.reserved = 0;
1681
1682 rc = il_send_cmd_sync(il, &cmd);
1683 if (rc)
1684 return rc;
1685
1686 pkt = (struct il_rx_packet *)cmd.reply_page;
1687 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1688 IL_ERR("Bad return from REPLY_RXON_ASSOC command\n");
1689 rc = -EIO;
1690 }
1691
1692 il_free_pages(il, cmd.reply_page);
1693
1694 return rc;
1695 }
1696
1697 /**
1698 * il3945_commit_rxon - commit staging_rxon to hardware
1699 *
1700 * The RXON command in staging_rxon is committed to the hardware and
1701 * the active_rxon structure is updated with the new data. This
1702 * function correctly transitions out of the RXON_ASSOC_MSK state if
1703 * a HW tune is required based on the RXON structure changes.
1704 */
1705 int il3945_commit_rxon(struct il_priv *il, struct il_rxon_context *ctx)
1706 {
1707 /* cast away the const for active_rxon in this function */
1708 struct il3945_rxon_cmd *active_rxon = (void *)&ctx->active;
1709 struct il3945_rxon_cmd *staging_rxon = (void *)&ctx->staging;
1710 int rc = 0;
1711 bool new_assoc = !!(staging_rxon->filter_flags & RXON_FILTER_ASSOC_MSK);
1712
1713 if (test_bit(STATUS_EXIT_PENDING, &il->status))
1714 return -EINVAL;
1715
1716 if (!il_is_alive(il))
1717 return -1;
1718
1719 /* always get timestamp with Rx frame */
1720 staging_rxon->flags |= RXON_FLG_TSF2HOST_MSK;
1721
1722 /* select antenna */
1723 staging_rxon->flags &=
1724 ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1725 staging_rxon->flags |= il3945_get_antenna_flags(il);
1726
1727 rc = il_check_rxon_cmd(il, ctx);
1728 if (rc) {
1729 IL_ERR("Invalid RXON configuration. Not committing.\n");
1730 return -EINVAL;
1731 }
1732
1733 /* If we don't need to send a full RXON, we can use
1734 * il3945_rxon_assoc_cmd which is used to reconfigure filter
1735 * and other flags for the current radio configuration. */
1736 if (!il_full_rxon_required(il,
1737 &il->contexts[IL_RXON_CTX_BSS])) {
1738 rc = il_send_rxon_assoc(il,
1739 &il->contexts[IL_RXON_CTX_BSS]);
1740 if (rc) {
1741 IL_ERR("Error setting RXON_ASSOC "
1742 "configuration (%d).\n", rc);
1743 return rc;
1744 }
1745
1746 memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
1747 /*
1748 * We do not commit tx power settings while channel changing,
1749 * do it now if tx power changed.
1750 */
1751 il_set_tx_power(il, il->tx_power_next, false);
1752 return 0;
1753 }
1754
1755 /* If we are currently associated and the new config requires
1756 * an RXON_ASSOC and the new config wants the associated mask enabled,
1757 * we must clear the associated from the active configuration
1758 * before we apply the new config */
1759 if (il_is_associated(il, IL_RXON_CTX_BSS) && new_assoc) {
1760 D_INFO("Toggling associated bit on current RXON\n");
1761 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1762
1763 /*
1764 * reserved4 and 5 could have been filled by the iwlcore code.
1765 * Let's clear them before pushing to the 3945.
1766 */
1767 active_rxon->reserved4 = 0;
1768 active_rxon->reserved5 = 0;
1769 rc = il_send_cmd_pdu(il, REPLY_RXON,
1770 sizeof(struct il3945_rxon_cmd),
1771 &il->contexts[IL_RXON_CTX_BSS].active);
1772
1773 /* If the mask clearing failed then we set
1774 * active_rxon back to what it was previously */
1775 if (rc) {
1776 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1777 IL_ERR("Error clearing ASSOC_MSK on current "
1778 "configuration (%d).\n", rc);
1779 return rc;
1780 }
1781 il_clear_ucode_stations(il,
1782 &il->contexts[IL_RXON_CTX_BSS]);
1783 il_restore_stations(il,
1784 &il->contexts[IL_RXON_CTX_BSS]);
1785 }
1786
1787 D_INFO("Sending RXON\n"
1788 "* with%s RXON_FILTER_ASSOC_MSK\n"
1789 "* channel = %d\n"
1790 "* bssid = %pM\n",
1791 (new_assoc ? "" : "out"),
1792 le16_to_cpu(staging_rxon->channel),
1793 staging_rxon->bssid_addr);
1794
1795 /*
1796 * reserved4 and 5 could have been filled by the iwlcore code.
1797 * Let's clear them before pushing to the 3945.
1798 */
1799 staging_rxon->reserved4 = 0;
1800 staging_rxon->reserved5 = 0;
1801
1802 il_set_rxon_hwcrypto(il, ctx, !il3945_mod_params.sw_crypto);
1803
1804 /* Apply the new configuration */
1805 rc = il_send_cmd_pdu(il, REPLY_RXON,
1806 sizeof(struct il3945_rxon_cmd),
1807 staging_rxon);
1808 if (rc) {
1809 IL_ERR("Error setting new configuration (%d).\n", rc);
1810 return rc;
1811 }
1812
1813 memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
1814
1815 if (!new_assoc) {
1816 il_clear_ucode_stations(il,
1817 &il->contexts[IL_RXON_CTX_BSS]);
1818 il_restore_stations(il,
1819 &il->contexts[IL_RXON_CTX_BSS]);
1820 }
1821
1822 /* If we issue a new RXON command which required a tune then we must
1823 * send a new TXPOWER command or we won't be able to Tx any frames */
1824 rc = il_set_tx_power(il, il->tx_power_next, true);
1825 if (rc) {
1826 IL_ERR("Error setting Tx power (%d).\n", rc);
1827 return rc;
1828 }
1829
1830 /* Init the hardware's rate fallback order based on the band */
1831 rc = il3945_init_hw_rate_table(il);
1832 if (rc) {
1833 IL_ERR("Error setting HW rate table: %02X\n", rc);
1834 return -EIO;
1835 }
1836
1837 return 0;
1838 }
1839
1840 /**
1841 * il3945_reg_txpower_periodic - called when time to check our temperature.
1842 *
1843 * -- reset periodic timer
1844 * -- see if temp has changed enough to warrant re-calibration ... if so:
1845 * -- correct coeffs for temp (can reset temp timer)
1846 * -- save this temp as "last",
1847 * -- send new set of gain settings to NIC
1848 * NOTE: This should continue working, even when we're not associated,
1849 * so we can keep our internal table of scan powers current. */
1850 void il3945_reg_txpower_periodic(struct il_priv *il)
1851 {
1852 /* This will kick in the "brute force"
1853 * il3945_hw_reg_comp_txpower_temp() below */
1854 if (!il3945_is_temp_calib_needed(il))
1855 goto reschedule;
1856
1857 /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1858 * This is based *only* on current temperature,
1859 * ignoring any previous power measurements */
1860 il3945_hw_reg_comp_txpower_temp(il);
1861
1862 reschedule:
1863 queue_delayed_work(il->workqueue,
1864 &il->_3945.thermal_periodic, REG_RECALIB_PERIOD * HZ);
1865 }
1866
1867 static void il3945_bg_reg_txpower_periodic(struct work_struct *work)
1868 {
1869 struct il_priv *il = container_of(work, struct il_priv,
1870 _3945.thermal_periodic.work);
1871
1872 if (test_bit(STATUS_EXIT_PENDING, &il->status))
1873 return;
1874
1875 mutex_lock(&il->mutex);
1876 il3945_reg_txpower_periodic(il);
1877 mutex_unlock(&il->mutex);
1878 }
1879
1880 /**
1881 * il3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
1882 * for the channel.
1883 *
1884 * This function is used when initializing channel-info structs.
1885 *
1886 * NOTE: These channel groups do *NOT* match the bands above!
1887 * These channel groups are based on factory-tested channels;
1888 * on A-band, EEPROM's "group frequency" entries represent the top
1889 * channel in each group 1-4. Group 5 All B/G channels are in group 0.
1890 */
1891 static u16 il3945_hw_reg_get_ch_grp_index(struct il_priv *il,
1892 const struct il_channel_info *ch_info)
1893 {
1894 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1895 struct il3945_eeprom_txpower_group *ch_grp = &eeprom->groups[0];
1896 u8 group;
1897 u16 group_index = 0; /* based on factory calib frequencies */
1898 u8 grp_channel;
1899
1900 /* Find the group index for the channel ... don't use index 1(?) */
1901 if (il_is_channel_a_band(ch_info)) {
1902 for (group = 1; group < 5; group++) {
1903 grp_channel = ch_grp[group].group_channel;
1904 if (ch_info->channel <= grp_channel) {
1905 group_index = group;
1906 break;
1907 }
1908 }
1909 /* group 4 has a few channels *above* its factory cal freq */
1910 if (group == 5)
1911 group_index = 4;
1912 } else
1913 group_index = 0; /* 2.4 GHz, group 0 */
1914
1915 D_POWER("Chnl %d mapped to grp %d\n", ch_info->channel,
1916 group_index);
1917 return group_index;
1918 }
1919
1920 /**
1921 * il3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
1922 *
1923 * Interpolate to get nominal (i.e. at factory calibration temperature) index
1924 * into radio/DSP gain settings table for requested power.
1925 */
1926 static int il3945_hw_reg_get_matched_power_index(struct il_priv *il,
1927 s8 requested_power,
1928 s32 setting_index, s32 *new_index)
1929 {
1930 const struct il3945_eeprom_txpower_group *chnl_grp = NULL;
1931 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1932 s32 index0, index1;
1933 s32 power = 2 * requested_power;
1934 s32 i;
1935 const struct il3945_eeprom_txpower_sample *samples;
1936 s32 gains0, gains1;
1937 s32 res;
1938 s32 denominator;
1939
1940 chnl_grp = &eeprom->groups[setting_index];
1941 samples = chnl_grp->samples;
1942 for (i = 0; i < 5; i++) {
1943 if (power == samples[i].power) {
1944 *new_index = samples[i].gain_index;
1945 return 0;
1946 }
1947 }
1948
1949 if (power > samples[1].power) {
1950 index0 = 0;
1951 index1 = 1;
1952 } else if (power > samples[2].power) {
1953 index0 = 1;
1954 index1 = 2;
1955 } else if (power > samples[3].power) {
1956 index0 = 2;
1957 index1 = 3;
1958 } else {
1959 index0 = 3;
1960 index1 = 4;
1961 }
1962
1963 denominator = (s32) samples[index1].power - (s32) samples[index0].power;
1964 if (denominator == 0)
1965 return -EINVAL;
1966 gains0 = (s32) samples[index0].gain_index * (1 << 19);
1967 gains1 = (s32) samples[index1].gain_index * (1 << 19);
1968 res = gains0 + (gains1 - gains0) *
1969 ((s32) power - (s32) samples[index0].power) / denominator +
1970 (1 << 18);
1971 *new_index = res >> 19;
1972 return 0;
1973 }
1974
1975 static void il3945_hw_reg_init_channel_groups(struct il_priv *il)
1976 {
1977 u32 i;
1978 s32 rate_index;
1979 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1980 const struct il3945_eeprom_txpower_group *group;
1981
1982 D_POWER("Initializing factory calib info from EEPROM\n");
1983
1984 for (i = 0; i < IL_NUM_TX_CALIB_GROUPS; i++) {
1985 s8 *clip_pwrs; /* table of power levels for each rate */
1986 s8 satur_pwr; /* saturation power for each chnl group */
1987 group = &eeprom->groups[i];
1988
1989 /* sanity check on factory saturation power value */
1990 if (group->saturation_power < 40) {
1991 IL_WARN("Error: saturation power is %d, "
1992 "less than minimum expected 40\n",
1993 group->saturation_power);
1994 return;
1995 }
1996
1997 /*
1998 * Derive requested power levels for each rate, based on
1999 * hardware capabilities (saturation power for band).
2000 * Basic value is 3dB down from saturation, with further
2001 * power reductions for highest 3 data rates. These
2002 * backoffs provide headroom for high rate modulation
2003 * power peaks, without too much distortion (clipping).
2004 */
2005 /* we'll fill in this array with h/w max power levels */
2006 clip_pwrs = (s8 *) il->_3945.clip_groups[i].clip_powers;
2007
2008 /* divide factory saturation power by 2 to find -3dB level */
2009 satur_pwr = (s8) (group->saturation_power >> 1);
2010
2011 /* fill in channel group's nominal powers for each rate */
2012 for (rate_index = 0;
2013 rate_index < IL_RATE_COUNT_3945; rate_index++, clip_pwrs++) {
2014 switch (rate_index) {
2015 case IL_RATE_36M_INDEX_TABLE:
2016 if (i == 0) /* B/G */
2017 *clip_pwrs = satur_pwr;
2018 else /* A */
2019 *clip_pwrs = satur_pwr - 5;
2020 break;
2021 case IL_RATE_48M_INDEX_TABLE:
2022 if (i == 0)
2023 *clip_pwrs = satur_pwr - 7;
2024 else
2025 *clip_pwrs = satur_pwr - 10;
2026 break;
2027 case IL_RATE_54M_INDEX_TABLE:
2028 if (i == 0)
2029 *clip_pwrs = satur_pwr - 9;
2030 else
2031 *clip_pwrs = satur_pwr - 12;
2032 break;
2033 default:
2034 *clip_pwrs = satur_pwr;
2035 break;
2036 }
2037 }
2038 }
2039 }
2040
2041 /**
2042 * il3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2043 *
2044 * Second pass (during init) to set up il->channel_info
2045 *
2046 * Set up Tx-power settings in our channel info database for each VALID
2047 * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2048 * and current temperature.
2049 *
2050 * Since this is based on current temperature (at init time), these values may
2051 * not be valid for very long, but it gives us a starting/default point,
2052 * and allows us to active (i.e. using Tx) scan.
2053 *
2054 * This does *not* write values to NIC, just sets up our internal table.
2055 */
2056 int il3945_txpower_set_from_eeprom(struct il_priv *il)
2057 {
2058 struct il_channel_info *ch_info = NULL;
2059 struct il3945_channel_power_info *pwr_info;
2060 struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
2061 int delta_index;
2062 u8 rate_index;
2063 u8 scan_tbl_index;
2064 const s8 *clip_pwrs; /* array of power levels for each rate */
2065 u8 gain, dsp_atten;
2066 s8 power;
2067 u8 pwr_index, base_pwr_index, a_band;
2068 u8 i;
2069 int temperature;
2070
2071 /* save temperature reference,
2072 * so we can determine next time to calibrate */
2073 temperature = il3945_hw_reg_txpower_get_temperature(il);
2074 il->last_temperature = temperature;
2075
2076 il3945_hw_reg_init_channel_groups(il);
2077
2078 /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2079 for (i = 0, ch_info = il->channel_info; i < il->channel_count;
2080 i++, ch_info++) {
2081 a_band = il_is_channel_a_band(ch_info);
2082 if (!il_is_channel_valid(ch_info))
2083 continue;
2084
2085 /* find this channel's channel group (*not* "band") index */
2086 ch_info->group_index =
2087 il3945_hw_reg_get_ch_grp_index(il, ch_info);
2088
2089 /* Get this chnlgrp's rate->max/clip-powers table */
2090 clip_pwrs = il->_3945.clip_groups[ch_info->group_index].clip_powers;
2091
2092 /* calculate power index *adjustment* value according to
2093 * diff between current temperature and factory temperature */
2094 delta_index = il3945_hw_reg_adjust_power_by_temp(temperature,
2095 eeprom->groups[ch_info->group_index].
2096 temperature);
2097
2098 D_POWER("Delta index for channel %d: %d [%d]\n",
2099 ch_info->channel, delta_index, temperature +
2100 IL_TEMP_CONVERT);
2101
2102 /* set tx power value for all OFDM rates */
2103 for (rate_index = 0; rate_index < IL_OFDM_RATES;
2104 rate_index++) {
2105 s32 uninitialized_var(power_idx);
2106 int rc;
2107
2108 /* use channel group's clip-power table,
2109 * but don't exceed channel's max power */
2110 s8 pwr = min(ch_info->max_power_avg,
2111 clip_pwrs[rate_index]);
2112
2113 pwr_info = &ch_info->power_info[rate_index];
2114
2115 /* get base (i.e. at factory-measured temperature)
2116 * power table index for this rate's power */
2117 rc = il3945_hw_reg_get_matched_power_index(il, pwr,
2118 ch_info->group_index,
2119 &power_idx);
2120 if (rc) {
2121 IL_ERR("Invalid power index\n");
2122 return rc;
2123 }
2124 pwr_info->base_power_index = (u8) power_idx;
2125
2126 /* temperature compensate */
2127 power_idx += delta_index;
2128
2129 /* stay within range of gain table */
2130 power_idx = il3945_hw_reg_fix_power_index(power_idx);
2131
2132 /* fill 1 OFDM rate's il3945_channel_power_info struct */
2133 pwr_info->requested_power = pwr;
2134 pwr_info->power_table_index = (u8) power_idx;
2135 pwr_info->tpc.tx_gain =
2136 power_gain_table[a_band][power_idx].tx_gain;
2137 pwr_info->tpc.dsp_atten =
2138 power_gain_table[a_band][power_idx].dsp_atten;
2139 }
2140
2141 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2142 pwr_info = &ch_info->power_info[IL_RATE_12M_INDEX_TABLE];
2143 power = pwr_info->requested_power +
2144 IL_CCK_FROM_OFDM_POWER_DIFF;
2145 pwr_index = pwr_info->power_table_index +
2146 IL_CCK_FROM_OFDM_INDEX_DIFF;
2147 base_pwr_index = pwr_info->base_power_index +
2148 IL_CCK_FROM_OFDM_INDEX_DIFF;
2149
2150 /* stay within table range */
2151 pwr_index = il3945_hw_reg_fix_power_index(pwr_index);
2152 gain = power_gain_table[a_band][pwr_index].tx_gain;
2153 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2154
2155 /* fill each CCK rate's il3945_channel_power_info structure
2156 * NOTE: All CCK-rate Txpwrs are the same for a given chnl!
2157 * NOTE: CCK rates start at end of OFDM rates! */
2158 for (rate_index = 0;
2159 rate_index < IL_CCK_RATES; rate_index++) {
2160 pwr_info = &ch_info->power_info[rate_index+IL_OFDM_RATES];
2161 pwr_info->requested_power = power;
2162 pwr_info->power_table_index = pwr_index;
2163 pwr_info->base_power_index = base_pwr_index;
2164 pwr_info->tpc.tx_gain = gain;
2165 pwr_info->tpc.dsp_atten = dsp_atten;
2166 }
2167
2168 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2169 for (scan_tbl_index = 0;
2170 scan_tbl_index < IL_NUM_SCAN_RATES; scan_tbl_index++) {
2171 s32 actual_index = (scan_tbl_index == 0) ?
2172 IL_RATE_1M_INDEX_TABLE : IL_RATE_6M_INDEX_TABLE;
2173 il3945_hw_reg_set_scan_power(il, scan_tbl_index,
2174 actual_index, clip_pwrs, ch_info, a_band);
2175 }
2176 }
2177
2178 return 0;
2179 }
2180
2181 int il3945_hw_rxq_stop(struct il_priv *il)
2182 {
2183 int rc;
2184
2185 il_wr(il, FH39_RCSR_CONFIG(0), 0);
2186 rc = il_poll_bit(il, FH39_RSSR_STATUS,
2187 FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
2188 if (rc < 0)
2189 IL_ERR("Can't stop Rx DMA.\n");
2190
2191 return 0;
2192 }
2193
2194 int il3945_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
2195 {
2196 int txq_id = txq->q.id;
2197
2198 struct il3945_shared *shared_data = il->_3945.shared_virt;
2199
2200 shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2201
2202 il_wr(il, FH39_CBCC_CTRL(txq_id), 0);
2203 il_wr(il, FH39_CBCC_BASE(txq_id), 0);
2204
2205 il_wr(il, FH39_TCSR_CONFIG(txq_id),
2206 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2207 FH39_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2208 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2209 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2210 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2211
2212 /* fake read to flush all prev. writes */
2213 _il_rd(il, FH39_TSSR_CBB_BASE);
2214
2215 return 0;
2216 }
2217
2218 /*
2219 * HCMD utils
2220 */
2221 static u16 il3945_get_hcmd_size(u8 cmd_id, u16 len)
2222 {
2223 switch (cmd_id) {
2224 case REPLY_RXON:
2225 return sizeof(struct il3945_rxon_cmd);
2226 case POWER_TABLE_CMD:
2227 return sizeof(struct il3945_powertable_cmd);
2228 default:
2229 return len;
2230 }
2231 }
2232
2233
2234 static u16 il3945_build_addsta_hcmd(const struct il_addsta_cmd *cmd,
2235 u8 *data)
2236 {
2237 struct il3945_addsta_cmd *addsta = (struct il3945_addsta_cmd *)data;
2238 addsta->mode = cmd->mode;
2239 memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
2240 memcpy(&addsta->key, &cmd->key, sizeof(struct il4965_keyinfo));
2241 addsta->station_flags = cmd->station_flags;
2242 addsta->station_flags_msk = cmd->station_flags_msk;
2243 addsta->tid_disable_tx = cpu_to_le16(0);
2244 addsta->rate_n_flags = cmd->rate_n_flags;
2245 addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
2246 addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
2247 addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
2248
2249 return (u16)sizeof(struct il3945_addsta_cmd);
2250 }
2251
2252 static int il3945_add_bssid_station(struct il_priv *il,
2253 const u8 *addr, u8 *sta_id_r)
2254 {
2255 struct il_rxon_context *ctx = &il->contexts[IL_RXON_CTX_BSS];
2256 int ret;
2257 u8 sta_id;
2258 unsigned long flags;
2259
2260 if (sta_id_r)
2261 *sta_id_r = IL_INVALID_STATION;
2262
2263 ret = il_add_station_common(il, ctx, addr, 0, NULL, &sta_id);
2264 if (ret) {
2265 IL_ERR("Unable to add station %pM\n", addr);
2266 return ret;
2267 }
2268
2269 if (sta_id_r)
2270 *sta_id_r = sta_id;
2271
2272 spin_lock_irqsave(&il->sta_lock, flags);
2273 il->stations[sta_id].used |= IL_STA_LOCAL;
2274 spin_unlock_irqrestore(&il->sta_lock, flags);
2275
2276 return 0;
2277 }
2278 static int il3945_manage_ibss_station(struct il_priv *il,
2279 struct ieee80211_vif *vif, bool add)
2280 {
2281 struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
2282 int ret;
2283
2284 if (add) {
2285 ret = il3945_add_bssid_station(il, vif->bss_conf.bssid,
2286 &vif_priv->ibss_bssid_sta_id);
2287 if (ret)
2288 return ret;
2289
2290 il3945_sync_sta(il, vif_priv->ibss_bssid_sta_id,
2291 (il->band == IEEE80211_BAND_5GHZ) ?
2292 IL_RATE_6M_PLCP : IL_RATE_1M_PLCP);
2293 il3945_rate_scale_init(il->hw, vif_priv->ibss_bssid_sta_id);
2294
2295 return 0;
2296 }
2297
2298 return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
2299 vif->bss_conf.bssid);
2300 }
2301
2302 /**
2303 * il3945_init_hw_rate_table - Initialize the hardware rate fallback table
2304 */
2305 int il3945_init_hw_rate_table(struct il_priv *il)
2306 {
2307 int rc, i, index, prev_index;
2308 struct il3945_rate_scaling_cmd rate_cmd = {
2309 .reserved = {0, 0, 0},
2310 };
2311 struct il3945_rate_scaling_info *table = rate_cmd.table;
2312
2313 for (i = 0; i < ARRAY_SIZE(il3945_rates); i++) {
2314 index = il3945_rates[i].table_rs_index;
2315
2316 table[index].rate_n_flags =
2317 il3945_hw_set_rate_n_flags(il3945_rates[i].plcp, 0);
2318 table[index].try_cnt = il->retry_rate;
2319 prev_index = il3945_get_prev_ieee_rate(i);
2320 table[index].next_rate_index =
2321 il3945_rates[prev_index].table_rs_index;
2322 }
2323
2324 switch (il->band) {
2325 case IEEE80211_BAND_5GHZ:
2326 D_RATE("Select A mode rate scale\n");
2327 /* If one of the following CCK rates is used,
2328 * have it fall back to the 6M OFDM rate */
2329 for (i = IL_RATE_1M_INDEX_TABLE;
2330 i <= IL_RATE_11M_INDEX_TABLE; i++)
2331 table[i].next_rate_index =
2332 il3945_rates[IL_FIRST_OFDM_RATE].table_rs_index;
2333
2334 /* Don't fall back to CCK rates */
2335 table[IL_RATE_12M_INDEX_TABLE].next_rate_index =
2336 IL_RATE_9M_INDEX_TABLE;
2337
2338 /* Don't drop out of OFDM rates */
2339 table[IL_RATE_6M_INDEX_TABLE].next_rate_index =
2340 il3945_rates[IL_FIRST_OFDM_RATE].table_rs_index;
2341 break;
2342
2343 case IEEE80211_BAND_2GHZ:
2344 D_RATE("Select B/G mode rate scale\n");
2345 /* If an OFDM rate is used, have it fall back to the
2346 * 1M CCK rates */
2347
2348 if (!(il->_3945.sta_supp_rates & IL_OFDM_RATES_MASK) &&
2349 il_is_associated(il, IL_RXON_CTX_BSS)) {
2350
2351 index = IL_FIRST_CCK_RATE;
2352 for (i = IL_RATE_6M_INDEX_TABLE;
2353 i <= IL_RATE_54M_INDEX_TABLE; i++)
2354 table[i].next_rate_index =
2355 il3945_rates[index].table_rs_index;
2356
2357 index = IL_RATE_11M_INDEX_TABLE;
2358 /* CCK shouldn't fall back to OFDM... */
2359 table[index].next_rate_index = IL_RATE_5M_INDEX_TABLE;
2360 }
2361 break;
2362
2363 default:
2364 WARN_ON(1);
2365 break;
2366 }
2367
2368 /* Update the rate scaling for control frame Tx */
2369 rate_cmd.table_id = 0;
2370 rc = il_send_cmd_pdu(il, REPLY_RATE_SCALE, sizeof(rate_cmd),
2371 &rate_cmd);
2372 if (rc)
2373 return rc;
2374
2375 /* Update the rate scaling for data frame Tx */
2376 rate_cmd.table_id = 1;
2377 return il_send_cmd_pdu(il, REPLY_RATE_SCALE, sizeof(rate_cmd),
2378 &rate_cmd);
2379 }
2380
2381 /* Called when initializing driver */
2382 int il3945_hw_set_hw_params(struct il_priv *il)
2383 {
2384 memset((void *)&il->hw_params, 0,
2385 sizeof(struct il_hw_params));
2386
2387 il->_3945.shared_virt =
2388 dma_alloc_coherent(&il->pci_dev->dev,
2389 sizeof(struct il3945_shared),
2390 &il->_3945.shared_phys, GFP_KERNEL);
2391 if (!il->_3945.shared_virt) {
2392 IL_ERR("failed to allocate pci memory\n");
2393 return -ENOMEM;
2394 }
2395
2396 /* Assign number of Usable TX queues */
2397 il->hw_params.max_txq_num = il->cfg->base_params->num_of_queues;
2398
2399 il->hw_params.tfd_size = sizeof(struct il3945_tfd);
2400 il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_3K);
2401 il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2402 il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2403 il->hw_params.max_stations = IWL3945_STATION_COUNT;
2404 il->contexts[IL_RXON_CTX_BSS].bcast_sta_id = IWL3945_BROADCAST_ID;
2405
2406 il->sta_key_max_num = STA_KEY_MAX_NUM;
2407
2408 il->hw_params.rx_wrt_ptr_reg = FH39_RSCSR_CHNL0_WPTR;
2409 il->hw_params.max_beacon_itrvl = IWL39_MAX_UCODE_BEACON_INTERVAL;
2410 il->hw_params.beacon_time_tsf_bits = IWL3945_EXT_BEACON_TIME_POS;
2411
2412 return 0;
2413 }
2414
2415 unsigned int il3945_hw_get_beacon_cmd(struct il_priv *il,
2416 struct il3945_frame *frame, u8 rate)
2417 {
2418 struct il3945_tx_beacon_cmd *tx_beacon_cmd;
2419 unsigned int frame_size;
2420
2421 tx_beacon_cmd = (struct il3945_tx_beacon_cmd *)&frame->u;
2422 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2423
2424 tx_beacon_cmd->tx.sta_id =
2425 il->contexts[IL_RXON_CTX_BSS].bcast_sta_id;
2426 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2427
2428 frame_size = il3945_fill_beacon_frame(il,
2429 tx_beacon_cmd->frame,
2430 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2431
2432 BUG_ON(frame_size > MAX_MPDU_SIZE);
2433 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2434
2435 tx_beacon_cmd->tx.rate = rate;
2436 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2437 TX_CMD_FLG_TSF_MSK);
2438
2439 /* supp_rates[0] == OFDM start at IL_FIRST_OFDM_RATE*/
2440 tx_beacon_cmd->tx.supp_rates[0] =
2441 (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
2442
2443 tx_beacon_cmd->tx.supp_rates[1] =
2444 (IL_CCK_BASIC_RATES_MASK & 0xF);
2445
2446 return sizeof(struct il3945_tx_beacon_cmd) + frame_size;
2447 }
2448
2449 void il3945_hw_rx_handler_setup(struct il_priv *il)
2450 {
2451 il->rx_handlers[REPLY_TX] = il3945_rx_reply_tx;
2452 il->rx_handlers[REPLY_3945_RX] = il3945_rx_reply_rx;
2453 }
2454
2455 void il3945_hw_setup_deferred_work(struct il_priv *il)
2456 {
2457 INIT_DELAYED_WORK(&il->_3945.thermal_periodic,
2458 il3945_bg_reg_txpower_periodic);
2459 }
2460
2461 void il3945_hw_cancel_deferred_work(struct il_priv *il)
2462 {
2463 cancel_delayed_work(&il->_3945.thermal_periodic);
2464 }
2465
2466 /* check contents of special bootstrap uCode SRAM */
2467 static int il3945_verify_bsm(struct il_priv *il)
2468 {
2469 __le32 *image = il->ucode_boot.v_addr;
2470 u32 len = il->ucode_boot.len;
2471 u32 reg;
2472 u32 val;
2473
2474 D_INFO("Begin verify bsm\n");
2475
2476 /* verify BSM SRAM contents */
2477 val = il_rd_prph(il, BSM_WR_DWCOUNT_REG);
2478 for (reg = BSM_SRAM_LOWER_BOUND;
2479 reg < BSM_SRAM_LOWER_BOUND + len;
2480 reg += sizeof(u32), image++) {
2481 val = il_rd_prph(il, reg);
2482 if (val != le32_to_cpu(*image)) {
2483 IL_ERR("BSM uCode verification failed at "
2484 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
2485 BSM_SRAM_LOWER_BOUND,
2486 reg - BSM_SRAM_LOWER_BOUND, len,
2487 val, le32_to_cpu(*image));
2488 return -EIO;
2489 }
2490 }
2491
2492 D_INFO("BSM bootstrap uCode image OK\n");
2493
2494 return 0;
2495 }
2496
2497
2498 /******************************************************************************
2499 *
2500 * EEPROM related functions
2501 *
2502 ******************************************************************************/
2503
2504 /*
2505 * Clear the OWNER_MSK, to establish driver (instead of uCode running on
2506 * embedded controller) as EEPROM reader; each read is a series of pulses
2507 * to/from the EEPROM chip, not a single event, so even reads could conflict
2508 * if they weren't arbitrated by some ownership mechanism. Here, the driver
2509 * simply claims ownership, which should be safe when this function is called
2510 * (i.e. before loading uCode!).
2511 */
2512 static int il3945_eeprom_acquire_semaphore(struct il_priv *il)
2513 {
2514 _il_clear_bit(il, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
2515 return 0;
2516 }
2517
2518
2519 static void il3945_eeprom_release_semaphore(struct il_priv *il)
2520 {
2521 return;
2522 }
2523
2524 /**
2525 * il3945_load_bsm - Load bootstrap instructions
2526 *
2527 * BSM operation:
2528 *
2529 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
2530 * in special SRAM that does not power down during RFKILL. When powering back
2531 * up after power-saving sleeps (or during initial uCode load), the BSM loads
2532 * the bootstrap program into the on-board processor, and starts it.
2533 *
2534 * The bootstrap program loads (via DMA) instructions and data for a new
2535 * program from host DRAM locations indicated by the host driver in the
2536 * BSM_DRAM_* registers. Once the new program is loaded, it starts
2537 * automatically.
2538 *
2539 * When initializing the NIC, the host driver points the BSM to the
2540 * "initialize" uCode image. This uCode sets up some internal data, then
2541 * notifies host via "initialize alive" that it is complete.
2542 *
2543 * The host then replaces the BSM_DRAM_* pointer values to point to the
2544 * normal runtime uCode instructions and a backup uCode data cache buffer
2545 * (filled initially with starting data values for the on-board processor),
2546 * then triggers the "initialize" uCode to load and launch the runtime uCode,
2547 * which begins normal operation.
2548 *
2549 * When doing a power-save shutdown, runtime uCode saves data SRAM into
2550 * the backup data cache in DRAM before SRAM is powered down.
2551 *
2552 * When powering back up, the BSM loads the bootstrap program. This reloads
2553 * the runtime uCode instructions and the backup data cache into SRAM,
2554 * and re-launches the runtime uCode from where it left off.
2555 */
2556 static int il3945_load_bsm(struct il_priv *il)
2557 {
2558 __le32 *image = il->ucode_boot.v_addr;
2559 u32 len = il->ucode_boot.len;
2560 dma_addr_t pinst;
2561 dma_addr_t pdata;
2562 u32 inst_len;
2563 u32 data_len;
2564 int rc;
2565 int i;
2566 u32 done;
2567 u32 reg_offset;
2568
2569 D_INFO("Begin load bsm\n");
2570
2571 /* make sure bootstrap program is no larger than BSM's SRAM size */
2572 if (len > IWL39_MAX_BSM_SIZE)
2573 return -EINVAL;
2574
2575 /* Tell bootstrap uCode where to find the "Initialize" uCode
2576 * in host DRAM ... host DRAM physical address bits 31:0 for 3945.
2577 * NOTE: il3945_initialize_alive_start() will replace these values,
2578 * after the "initialize" uCode has run, to point to
2579 * runtime/protocol instructions and backup data cache. */
2580 pinst = il->ucode_init.p_addr;
2581 pdata = il->ucode_init_data.p_addr;
2582 inst_len = il->ucode_init.len;
2583 data_len = il->ucode_init_data.len;
2584
2585 il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2586 il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2587 il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
2588 il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
2589
2590 /* Fill BSM memory with bootstrap instructions */
2591 for (reg_offset = BSM_SRAM_LOWER_BOUND;
2592 reg_offset < BSM_SRAM_LOWER_BOUND + len;
2593 reg_offset += sizeof(u32), image++)
2594 _il_wr_prph(il, reg_offset,
2595 le32_to_cpu(*image));
2596
2597 rc = il3945_verify_bsm(il);
2598 if (rc)
2599 return rc;
2600
2601 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
2602 il_wr_prph(il, BSM_WR_MEM_SRC_REG, 0x0);
2603 il_wr_prph(il, BSM_WR_MEM_DST_REG,
2604 IWL39_RTC_INST_LOWER_BOUND);
2605 il_wr_prph(il, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
2606
2607 /* Load bootstrap code into instruction SRAM now,
2608 * to prepare to load "initialize" uCode */
2609 il_wr_prph(il, BSM_WR_CTRL_REG,
2610 BSM_WR_CTRL_REG_BIT_START);
2611
2612 /* Wait for load of bootstrap uCode to finish */
2613 for (i = 0; i < 100; i++) {
2614 done = il_rd_prph(il, BSM_WR_CTRL_REG);
2615 if (!(done & BSM_WR_CTRL_REG_BIT_START))
2616 break;
2617 udelay(10);
2618 }
2619 if (i < 100)
2620 D_INFO("BSM write complete, poll %d iterations\n", i);
2621 else {
2622 IL_ERR("BSM write did not complete!\n");
2623 return -EIO;
2624 }
2625
2626 /* Enable future boot loads whenever power management unit triggers it
2627 * (e.g. when powering back up after power-save shutdown) */
2628 il_wr_prph(il, BSM_WR_CTRL_REG,
2629 BSM_WR_CTRL_REG_BIT_START_EN);
2630
2631 return 0;
2632 }
2633
2634 static struct il_hcmd_ops il3945_hcmd = {
2635 .rxon_assoc = il3945_send_rxon_assoc,
2636 .commit_rxon = il3945_commit_rxon,
2637 };
2638
2639 static struct il_lib_ops il3945_lib = {
2640 .txq_attach_buf_to_tfd = il3945_hw_txq_attach_buf_to_tfd,
2641 .txq_free_tfd = il3945_hw_txq_free_tfd,
2642 .txq_init = il3945_hw_tx_queue_init,
2643 .load_ucode = il3945_load_bsm,
2644 .dump_nic_error_log = il3945_dump_nic_error_log,
2645 .apm_ops = {
2646 .init = il3945_apm_init,
2647 .config = il3945_nic_config,
2648 },
2649 .eeprom_ops = {
2650 .regulatory_bands = {
2651 EEPROM_REGULATORY_BAND_1_CHANNELS,
2652 EEPROM_REGULATORY_BAND_2_CHANNELS,
2653 EEPROM_REGULATORY_BAND_3_CHANNELS,
2654 EEPROM_REGULATORY_BAND_4_CHANNELS,
2655 EEPROM_REGULATORY_BAND_5_CHANNELS,
2656 EEPROM_REGULATORY_BAND_NO_HT40,
2657 EEPROM_REGULATORY_BAND_NO_HT40,
2658 },
2659 .acquire_semaphore = il3945_eeprom_acquire_semaphore,
2660 .release_semaphore = il3945_eeprom_release_semaphore,
2661 },
2662 .send_tx_power = il3945_send_tx_power,
2663 .is_valid_rtc_data_addr = il3945_hw_valid_rtc_data_addr,
2664
2665 .debugfs_ops = {
2666 .rx_stats_read = il3945_ucode_rx_stats_read,
2667 .tx_stats_read = il3945_ucode_tx_stats_read,
2668 .general_stats_read = il3945_ucode_general_stats_read,
2669 },
2670 };
2671
2672 static const struct il_legacy_ops il3945_legacy_ops = {
2673 .post_associate = il3945_post_associate,
2674 .config_ap = il3945_config_ap,
2675 .manage_ibss_station = il3945_manage_ibss_station,
2676 };
2677
2678 static struct il_hcmd_utils_ops il3945_hcmd_utils = {
2679 .get_hcmd_size = il3945_get_hcmd_size,
2680 .build_addsta_hcmd = il3945_build_addsta_hcmd,
2681 .request_scan = il3945_request_scan,
2682 .post_scan = il3945_post_scan,
2683 };
2684
2685 static const struct il_ops il3945_ops = {
2686 .lib = &il3945_lib,
2687 .hcmd = &il3945_hcmd,
2688 .utils = &il3945_hcmd_utils,
2689 .led = &il3945_led_ops,
2690 .legacy = &il3945_legacy_ops,
2691 .ieee80211_ops = &il3945_hw_ops,
2692 };
2693
2694 static struct il_base_params il3945_base_params = {
2695 .eeprom_size = IWL3945_EEPROM_IMG_SIZE,
2696 .num_of_queues = IWL39_NUM_QUEUES,
2697 .pll_cfg_val = CSR39_ANA_PLL_CFG_VAL,
2698 .set_l0s = false,
2699 .use_bsm = true,
2700 .led_compensation = 64,
2701 .wd_timeout = IL_DEF_WD_TIMEOUT,
2702 };
2703
2704 static struct il_cfg il3945_bg_cfg = {
2705 .name = "3945BG",
2706 .fw_name_pre = IWL3945_FW_PRE,
2707 .ucode_api_max = IWL3945_UCODE_API_MAX,
2708 .ucode_api_min = IWL3945_UCODE_API_MIN,
2709 .sku = IL_SKU_G,
2710 .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
2711 .ops = &il3945_ops,
2712 .mod_params = &il3945_mod_params,
2713 .base_params = &il3945_base_params,
2714 .led_mode = IL_LED_BLINK,
2715 };
2716
2717 static struct il_cfg il3945_abg_cfg = {
2718 .name = "3945ABG",
2719 .fw_name_pre = IWL3945_FW_PRE,
2720 .ucode_api_max = IWL3945_UCODE_API_MAX,
2721 .ucode_api_min = IWL3945_UCODE_API_MIN,
2722 .sku = IL_SKU_A|IL_SKU_G,
2723 .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
2724 .ops = &il3945_ops,
2725 .mod_params = &il3945_mod_params,
2726 .base_params = &il3945_base_params,
2727 .led_mode = IL_LED_BLINK,
2728 };
2729
2730 DEFINE_PCI_DEVICE_TABLE(il3945_hw_card_ids) = {
2731 {IL_PCI_DEVICE(0x4222, 0x1005, il3945_bg_cfg)},
2732 {IL_PCI_DEVICE(0x4222, 0x1034, il3945_bg_cfg)},
2733 {IL_PCI_DEVICE(0x4222, 0x1044, il3945_bg_cfg)},
2734 {IL_PCI_DEVICE(0x4227, 0x1014, il3945_bg_cfg)},
2735 {IL_PCI_DEVICE(0x4222, PCI_ANY_ID, il3945_abg_cfg)},
2736 {IL_PCI_DEVICE(0x4227, PCI_ANY_ID, il3945_abg_cfg)},
2737 {0}
2738 };
2739
2740 MODULE_DEVICE_TABLE(pci, il3945_hw_card_ids);
Linux kernel - Deliverables
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