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iwlwifi: DMA fixes
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wireless / iwlwifi / iwl-3945.c
blob527525cc0919e523dc1f813b54d68935224e0880
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2009 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/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>
40
41 #include "iwl-fh.h"
42 #include "iwl-3945-fh.h"
43 #include "iwl-commands.h"
44 #include "iwl-sta.h"
45 #include "iwl-3945.h"
46 #include "iwl-eeprom.h"
47 #include "iwl-helpers.h"
48 #include "iwl-core.h"
49 #include "iwl-agn-rs.h"
50
51 #define IWL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np) \
52 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
53 IWL_RATE_##r##M_IEEE, \
54 IWL_RATE_##ip##M_INDEX, \
55 IWL_RATE_##in##M_INDEX, \
56 IWL_RATE_##rp##M_INDEX, \
57 IWL_RATE_##rn##M_INDEX, \
58 IWL_RATE_##pp##M_INDEX, \
59 IWL_RATE_##np##M_INDEX, \
60 IWL_RATE_##r##M_INDEX_TABLE, \
61 IWL_RATE_##ip##M_INDEX_TABLE }
62
63 /*
64 * Parameter order:
65 * rate, prev rate, next rate, prev tgg rate, next tgg rate
66 *
67 * If there isn't a valid next or previous rate then INV is used which
68 * maps to IWL_RATE_INVALID
69 *
70 */
71 const struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT_3945] = {
72 IWL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2), /* 1mbps */
73 IWL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5), /* 2mbps */
74 IWL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11), /*5.5mbps */
75 IWL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18), /* 11mbps */
76 IWL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11), /* 6mbps */
77 IWL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11), /* 9mbps */
78 IWL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18), /* 12mbps */
79 IWL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24), /* 18mbps */
80 IWL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36), /* 24mbps */
81 IWL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48), /* 36mbps */
82 IWL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54), /* 48mbps */
83 IWL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),/* 54mbps */
84 };
85
86 /* 1 = enable the iwl3945_disable_events() function */
87 #define IWL_EVT_DISABLE (0)
88 #define IWL_EVT_DISABLE_SIZE (1532/32)
89
90 /**
91 * iwl3945_disable_events - Disable selected events in uCode event log
92 *
93 * Disable an event by writing "1"s into "disable"
94 * bitmap in SRAM. Bit position corresponds to Event # (id/type).
95 * Default values of 0 enable uCode events to be logged.
96 * Use for only special debugging. This function is just a placeholder as-is,
97 * you'll need to provide the special bits! ...
98 * ... and set IWL_EVT_DISABLE to 1. */
99 void iwl3945_disable_events(struct iwl_priv *priv)
100 {
101 int ret;
102 int i;
103 u32 base; /* SRAM address of event log header */
104 u32 disable_ptr; /* SRAM address of event-disable bitmap array */
105 u32 array_size; /* # of u32 entries in array */
106 u32 evt_disable[IWL_EVT_DISABLE_SIZE] = {
107 0x00000000, /* 31 - 0 Event id numbers */
108 0x00000000, /* 63 - 32 */
109 0x00000000, /* 95 - 64 */
110 0x00000000, /* 127 - 96 */
111 0x00000000, /* 159 - 128 */
112 0x00000000, /* 191 - 160 */
113 0x00000000, /* 223 - 192 */
114 0x00000000, /* 255 - 224 */
115 0x00000000, /* 287 - 256 */
116 0x00000000, /* 319 - 288 */
117 0x00000000, /* 351 - 320 */
118 0x00000000, /* 383 - 352 */
119 0x00000000, /* 415 - 384 */
120 0x00000000, /* 447 - 416 */
121 0x00000000, /* 479 - 448 */
122 0x00000000, /* 511 - 480 */
123 0x00000000, /* 543 - 512 */
124 0x00000000, /* 575 - 544 */
125 0x00000000, /* 607 - 576 */
126 0x00000000, /* 639 - 608 */
127 0x00000000, /* 671 - 640 */
128 0x00000000, /* 703 - 672 */
129 0x00000000, /* 735 - 704 */
130 0x00000000, /* 767 - 736 */
131 0x00000000, /* 799 - 768 */
132 0x00000000, /* 831 - 800 */
133 0x00000000, /* 863 - 832 */
134 0x00000000, /* 895 - 864 */
135 0x00000000, /* 927 - 896 */
136 0x00000000, /* 959 - 928 */
137 0x00000000, /* 991 - 960 */
138 0x00000000, /* 1023 - 992 */
139 0x00000000, /* 1055 - 1024 */
140 0x00000000, /* 1087 - 1056 */
141 0x00000000, /* 1119 - 1088 */
142 0x00000000, /* 1151 - 1120 */
143 0x00000000, /* 1183 - 1152 */
144 0x00000000, /* 1215 - 1184 */
145 0x00000000, /* 1247 - 1216 */
146 0x00000000, /* 1279 - 1248 */
147 0x00000000, /* 1311 - 1280 */
148 0x00000000, /* 1343 - 1312 */
149 0x00000000, /* 1375 - 1344 */
150 0x00000000, /* 1407 - 1376 */
151 0x00000000, /* 1439 - 1408 */
152 0x00000000, /* 1471 - 1440 */
153 0x00000000, /* 1503 - 1472 */
154 };
155
156 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
157 if (!iwl3945_hw_valid_rtc_data_addr(base)) {
158 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
159 return;
160 }
161
162 ret = iwl_grab_nic_access(priv);
163 if (ret) {
164 IWL_WARN(priv, "Can not read from adapter at this time.\n");
165 return;
166 }
167
168 disable_ptr = iwl_read_targ_mem(priv, base + (4 * sizeof(u32)));
169 array_size = iwl_read_targ_mem(priv, base + (5 * sizeof(u32)));
170 iwl_release_nic_access(priv);
171
172 if (IWL_EVT_DISABLE && (array_size == IWL_EVT_DISABLE_SIZE)) {
173 IWL_DEBUG_INFO(priv, "Disabling selected uCode log events at 0x%x\n",
174 disable_ptr);
175 ret = iwl_grab_nic_access(priv);
176 for (i = 0; i < IWL_EVT_DISABLE_SIZE; i++)
177 iwl_write_targ_mem(priv,
178 disable_ptr + (i * sizeof(u32)),
179 evt_disable[i]);
180
181 iwl_release_nic_access(priv);
182 } else {
183 IWL_DEBUG_INFO(priv, "Selected uCode log events may be disabled\n");
184 IWL_DEBUG_INFO(priv, " by writing \"1\"s into disable bitmap\n");
185 IWL_DEBUG_INFO(priv, " in SRAM at 0x%x, size %d u32s\n",
186 disable_ptr, array_size);
187 }
188
189 }
190
191 static int iwl3945_hwrate_to_plcp_idx(u8 plcp)
192 {
193 int idx;
194
195 for (idx = 0; idx < IWL_RATE_COUNT; idx++)
196 if (iwl3945_rates[idx].plcp == plcp)
197 return idx;
198 return -1;
199 }
200
201 #ifdef CONFIG_IWLWIFI_DEBUG
202 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
203
204 static const char *iwl3945_get_tx_fail_reason(u32 status)
205 {
206 switch (status & TX_STATUS_MSK) {
207 case TX_STATUS_SUCCESS:
208 return "SUCCESS";
209 TX_STATUS_ENTRY(SHORT_LIMIT);
210 TX_STATUS_ENTRY(LONG_LIMIT);
211 TX_STATUS_ENTRY(FIFO_UNDERRUN);
212 TX_STATUS_ENTRY(MGMNT_ABORT);
213 TX_STATUS_ENTRY(NEXT_FRAG);
214 TX_STATUS_ENTRY(LIFE_EXPIRE);
215 TX_STATUS_ENTRY(DEST_PS);
216 TX_STATUS_ENTRY(ABORTED);
217 TX_STATUS_ENTRY(BT_RETRY);
218 TX_STATUS_ENTRY(STA_INVALID);
219 TX_STATUS_ENTRY(FRAG_DROPPED);
220 TX_STATUS_ENTRY(TID_DISABLE);
221 TX_STATUS_ENTRY(FRAME_FLUSHED);
222 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
223 TX_STATUS_ENTRY(TX_LOCKED);
224 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
225 }
226
227 return "UNKNOWN";
228 }
229 #else
230 static inline const char *iwl3945_get_tx_fail_reason(u32 status)
231 {
232 return "";
233 }
234 #endif
235
236 /*
237 * get ieee prev rate from rate scale table.
238 * for A and B mode we need to overright prev
239 * value
240 */
241 int iwl3945_rs_next_rate(struct iwl_priv *priv, int rate)
242 {
243 int next_rate = iwl3945_get_prev_ieee_rate(rate);
244
245 switch (priv->band) {
246 case IEEE80211_BAND_5GHZ:
247 if (rate == IWL_RATE_12M_INDEX)
248 next_rate = IWL_RATE_9M_INDEX;
249 else if (rate == IWL_RATE_6M_INDEX)
250 next_rate = IWL_RATE_6M_INDEX;
251 break;
252 case IEEE80211_BAND_2GHZ:
253 if (!(priv->sta_supp_rates & IWL_OFDM_RATES_MASK) &&
254 iwl_is_associated(priv)) {
255 if (rate == IWL_RATE_11M_INDEX)
256 next_rate = IWL_RATE_5M_INDEX;
257 }
258 break;
259
260 default:
261 break;
262 }
263
264 return next_rate;
265 }
266
267
268 /**
269 * iwl3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
270 *
271 * When FW advances 'R' index, all entries between old and new 'R' index
272 * need to be reclaimed. As result, some free space forms. If there is
273 * enough free space (> low mark), wake the stack that feeds us.
274 */
275 static void iwl3945_tx_queue_reclaim(struct iwl_priv *priv,
276 int txq_id, int index)
277 {
278 struct iwl_tx_queue *txq = &priv->txq[txq_id];
279 struct iwl_queue *q = &txq->q;
280 struct iwl_tx_info *tx_info;
281
282 BUG_ON(txq_id == IWL_CMD_QUEUE_NUM);
283
284 for (index = iwl_queue_inc_wrap(index, q->n_bd); q->read_ptr != index;
285 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
286
287 tx_info = &txq->txb[txq->q.read_ptr];
288 ieee80211_tx_status_irqsafe(priv->hw, tx_info->skb[0]);
289 tx_info->skb[0] = NULL;
290 priv->cfg->ops->lib->txq_free_tfd(priv, txq);
291 }
292
293 if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
294 (txq_id != IWL_CMD_QUEUE_NUM) &&
295 priv->mac80211_registered)
296 iwl_wake_queue(priv, txq_id);
297 }
298
299 /**
300 * iwl3945_rx_reply_tx - Handle Tx response
301 */
302 static void iwl3945_rx_reply_tx(struct iwl_priv *priv,
303 struct iwl_rx_mem_buffer *rxb)
304 {
305 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
306 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
307 int txq_id = SEQ_TO_QUEUE(sequence);
308 int index = SEQ_TO_INDEX(sequence);
309 struct iwl_tx_queue *txq = &priv->txq[txq_id];
310 struct ieee80211_tx_info *info;
311 struct iwl3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
312 u32 status = le32_to_cpu(tx_resp->status);
313 int rate_idx;
314 int fail;
315
316 if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
317 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
318 "is out of range [0-%d] %d %d\n", txq_id,
319 index, txq->q.n_bd, txq->q.write_ptr,
320 txq->q.read_ptr);
321 return;
322 }
323
324 info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
325 ieee80211_tx_info_clear_status(info);
326
327 /* Fill the MRR chain with some info about on-chip retransmissions */
328 rate_idx = iwl3945_hwrate_to_plcp_idx(tx_resp->rate);
329 if (info->band == IEEE80211_BAND_5GHZ)
330 rate_idx -= IWL_FIRST_OFDM_RATE;
331
332 fail = tx_resp->failure_frame;
333
334 info->status.rates[0].idx = rate_idx;
335 info->status.rates[0].count = fail + 1; /* add final attempt */
336
337 /* tx_status->rts_retry_count = tx_resp->failure_rts; */
338 info->flags |= ((status & TX_STATUS_MSK) == TX_STATUS_SUCCESS) ?
339 IEEE80211_TX_STAT_ACK : 0;
340
341 IWL_DEBUG_TX(priv, "Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n",
342 txq_id, iwl3945_get_tx_fail_reason(status), status,
343 tx_resp->rate, tx_resp->failure_frame);
344
345 IWL_DEBUG_TX_REPLY(priv, "Tx queue reclaim %d\n", index);
346 iwl3945_tx_queue_reclaim(priv, txq_id, index);
347
348 if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
349 IWL_ERR(priv, "TODO: Implement Tx ABORT REQUIRED!!!\n");
350 }
351
352
353
354 /*****************************************************************************
355 *
356 * Intel PRO/Wireless 3945ABG/BG Network Connection
357 *
358 * RX handler implementations
359 *
360 *****************************************************************************/
361
362 void iwl3945_hw_rx_statistics(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
363 {
364 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
365 IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n",
366 (int)sizeof(struct iwl3945_notif_statistics),
367 le32_to_cpu(pkt->len));
368
369 memcpy(&priv->statistics_39, pkt->u.raw, sizeof(priv->statistics_39));
370
371 iwl3945_led_background(priv);
372
373 priv->last_statistics_time = jiffies;
374 }
375
376 /******************************************************************************
377 *
378 * Misc. internal state and helper functions
379 *
380 ******************************************************************************/
381 #ifdef CONFIG_IWLWIFI_DEBUG
382
383 /**
384 * iwl3945_report_frame - dump frame to syslog during debug sessions
385 *
386 * You may hack this function to show different aspects of received frames,
387 * including selective frame dumps.
388 * group100 parameter selects whether to show 1 out of 100 good frames.
389 */
390 static void _iwl3945_dbg_report_frame(struct iwl_priv *priv,
391 struct iwl_rx_packet *pkt,
392 struct ieee80211_hdr *header, int group100)
393 {
394 u32 to_us;
395 u32 print_summary = 0;
396 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
397 u32 hundred = 0;
398 u32 dataframe = 0;
399 __le16 fc;
400 u16 seq_ctl;
401 u16 channel;
402 u16 phy_flags;
403 u16 length;
404 u16 status;
405 u16 bcn_tmr;
406 u32 tsf_low;
407 u64 tsf;
408 u8 rssi;
409 u8 agc;
410 u16 sig_avg;
411 u16 noise_diff;
412 struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
413 struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
414 struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
415 u8 *data = IWL_RX_DATA(pkt);
416
417 /* MAC header */
418 fc = header->frame_control;
419 seq_ctl = le16_to_cpu(header->seq_ctrl);
420
421 /* metadata */
422 channel = le16_to_cpu(rx_hdr->channel);
423 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
424 length = le16_to_cpu(rx_hdr->len);
425
426 /* end-of-frame status and timestamp */
427 status = le32_to_cpu(rx_end->status);
428 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
429 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
430 tsf = le64_to_cpu(rx_end->timestamp);
431
432 /* signal statistics */
433 rssi = rx_stats->rssi;
434 agc = rx_stats->agc;
435 sig_avg = le16_to_cpu(rx_stats->sig_avg);
436 noise_diff = le16_to_cpu(rx_stats->noise_diff);
437
438 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
439
440 /* if data frame is to us and all is good,
441 * (optionally) print summary for only 1 out of every 100 */
442 if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) ==
443 cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
444 dataframe = 1;
445 if (!group100)
446 print_summary = 1; /* print each frame */
447 else if (priv->framecnt_to_us < 100) {
448 priv->framecnt_to_us++;
449 print_summary = 0;
450 } else {
451 priv->framecnt_to_us = 0;
452 print_summary = 1;
453 hundred = 1;
454 }
455 } else {
456 /* print summary for all other frames */
457 print_summary = 1;
458 }
459
460 if (print_summary) {
461 char *title;
462 int rate;
463
464 if (hundred)
465 title = "100Frames";
466 else if (ieee80211_has_retry(fc))
467 title = "Retry";
468 else if (ieee80211_is_assoc_resp(fc))
469 title = "AscRsp";
470 else if (ieee80211_is_reassoc_resp(fc))
471 title = "RasRsp";
472 else if (ieee80211_is_probe_resp(fc)) {
473 title = "PrbRsp";
474 print_dump = 1; /* dump frame contents */
475 } else if (ieee80211_is_beacon(fc)) {
476 title = "Beacon";
477 print_dump = 1; /* dump frame contents */
478 } else if (ieee80211_is_atim(fc))
479 title = "ATIM";
480 else if (ieee80211_is_auth(fc))
481 title = "Auth";
482 else if (ieee80211_is_deauth(fc))
483 title = "DeAuth";
484 else if (ieee80211_is_disassoc(fc))
485 title = "DisAssoc";
486 else
487 title = "Frame";
488
489 rate = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
490 if (rate == -1)
491 rate = 0;
492 else
493 rate = iwl3945_rates[rate].ieee / 2;
494
495 /* print frame summary.
496 * MAC addresses show just the last byte (for brevity),
497 * but you can hack it to show more, if you'd like to. */
498 if (dataframe)
499 IWL_DEBUG_RX(priv, "%s: mhd=0x%04x, dst=0x%02x, "
500 "len=%u, rssi=%d, chnl=%d, rate=%d, \n",
501 title, le16_to_cpu(fc), header->addr1[5],
502 length, rssi, channel, rate);
503 else {
504 /* src/dst addresses assume managed mode */
505 IWL_DEBUG_RX(priv, "%s: 0x%04x, dst=0x%02x, "
506 "src=0x%02x, rssi=%u, tim=%lu usec, "
507 "phy=0x%02x, chnl=%d\n",
508 title, le16_to_cpu(fc), header->addr1[5],
509 header->addr3[5], rssi,
510 tsf_low - priv->scan_start_tsf,
511 phy_flags, channel);
512 }
513 }
514 if (print_dump)
515 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
516 }
517
518 static void iwl3945_dbg_report_frame(struct iwl_priv *priv,
519 struct iwl_rx_packet *pkt,
520 struct ieee80211_hdr *header, int group100)
521 {
522 if (priv->debug_level & IWL_DL_RX)
523 _iwl3945_dbg_report_frame(priv, pkt, header, group100);
524 }
525
526 #else
527 static inline void iwl3945_dbg_report_frame(struct iwl_priv *priv,
528 struct iwl_rx_packet *pkt,
529 struct ieee80211_hdr *header, int group100)
530 {
531 }
532 #endif
533
534 /* This is necessary only for a number of statistics, see the caller. */
535 static int iwl3945_is_network_packet(struct iwl_priv *priv,
536 struct ieee80211_hdr *header)
537 {
538 /* Filter incoming packets to determine if they are targeted toward
539 * this network, discarding packets coming from ourselves */
540 switch (priv->iw_mode) {
541 case NL80211_IFTYPE_ADHOC: /* Header: Dest. | Source | BSSID */
542 /* packets to our IBSS update information */
543 return !compare_ether_addr(header->addr3, priv->bssid);
544 case NL80211_IFTYPE_STATION: /* Header: Dest. | AP{BSSID} | Source */
545 /* packets to our IBSS update information */
546 return !compare_ether_addr(header->addr2, priv->bssid);
547 default:
548 return 1;
549 }
550 }
551
552 static void iwl3945_pass_packet_to_mac80211(struct iwl_priv *priv,
553 struct iwl_rx_mem_buffer *rxb,
554 struct ieee80211_rx_status *stats)
555 {
556 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
557 #ifdef CONFIG_IWLWIFI_LEDS
558 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
559 #endif
560 struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
561 struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
562 short len = le16_to_cpu(rx_hdr->len);
563
564 /* We received data from the HW, so stop the watchdog */
565 if (unlikely((len + IWL39_RX_FRAME_SIZE) > skb_tailroom(rxb->skb))) {
566 IWL_DEBUG_DROP(priv, "Corruption detected!\n");
567 return;
568 }
569
570 /* We only process data packets if the interface is open */
571 if (unlikely(!priv->is_open)) {
572 IWL_DEBUG_DROP_LIMIT(priv,
573 "Dropping packet while interface is not open.\n");
574 return;
575 }
576
577 skb_reserve(rxb->skb, (void *)rx_hdr->payload - (void *)pkt);
578 /* Set the size of the skb to the size of the frame */
579 skb_put(rxb->skb, le16_to_cpu(rx_hdr->len));
580
581 if (!iwl3945_mod_params.sw_crypto)
582 iwl_set_decrypted_flag(priv,
583 (struct ieee80211_hdr *)rxb->skb->data,
584 le32_to_cpu(rx_end->status), stats);
585
586 #ifdef CONFIG_IWLWIFI_LEDS
587 if (ieee80211_is_data(hdr->frame_control))
588 priv->rxtxpackets += len;
589 #endif
590 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
591 rxb->skb = NULL;
592 }
593
594 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
595
596 static void iwl3945_rx_reply_rx(struct iwl_priv *priv,
597 struct iwl_rx_mem_buffer *rxb)
598 {
599 struct ieee80211_hdr *header;
600 struct ieee80211_rx_status rx_status;
601 struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
602 struct iwl3945_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
603 struct iwl3945_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
604 struct iwl3945_rx_frame_end *rx_end = IWL_RX_END(pkt);
605 int snr;
606 u16 rx_stats_sig_avg = le16_to_cpu(rx_stats->sig_avg);
607 u16 rx_stats_noise_diff = le16_to_cpu(rx_stats->noise_diff);
608 u8 network_packet;
609
610 rx_status.flag = 0;
611 rx_status.mactime = le64_to_cpu(rx_end->timestamp);
612 rx_status.freq =
613 ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel));
614 rx_status.band = (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
615 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
616
617 rx_status.rate_idx = iwl3945_hwrate_to_plcp_idx(rx_hdr->rate);
618 if (rx_status.band == IEEE80211_BAND_5GHZ)
619 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
620
621 rx_status.antenna = le16_to_cpu(rx_hdr->phy_flags &
622 RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
623
624 /* set the preamble flag if appropriate */
625 if (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
626 rx_status.flag |= RX_FLAG_SHORTPRE;
627
628 if ((unlikely(rx_stats->phy_count > 20))) {
629 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
630 rx_stats->phy_count);
631 return;
632 }
633
634 if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR)
635 || !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
636 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
637 return;
638 }
639
640
641
642 /* Convert 3945's rssi indicator to dBm */
643 rx_status.signal = rx_stats->rssi - IWL39_RSSI_OFFSET;
644
645 /* Set default noise value to -127 */
646 if (priv->last_rx_noise == 0)
647 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
648
649 /* 3945 provides noise info for OFDM frames only.
650 * sig_avg and noise_diff are measured by the 3945's digital signal
651 * processor (DSP), and indicate linear levels of signal level and
652 * distortion/noise within the packet preamble after
653 * automatic gain control (AGC). sig_avg should stay fairly
654 * constant if the radio's AGC is working well.
655 * Since these values are linear (not dB or dBm), linear
656 * signal-to-noise ratio (SNR) is (sig_avg / noise_diff).
657 * Convert linear SNR to dB SNR, then subtract that from rssi dBm
658 * to obtain noise level in dBm.
659 * Calculate rx_status.signal (quality indicator in %) based on SNR. */
660 if (rx_stats_noise_diff) {
661 snr = rx_stats_sig_avg / rx_stats_noise_diff;
662 rx_status.noise = rx_status.signal -
663 iwl3945_calc_db_from_ratio(snr);
664 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal,
665 rx_status.noise);
666
667 /* If noise info not available, calculate signal quality indicator (%)
668 * using just the dBm signal level. */
669 } else {
670 rx_status.noise = priv->last_rx_noise;
671 rx_status.qual = iwl3945_calc_sig_qual(rx_status.signal, 0);
672 }
673
674
675 IWL_DEBUG_STATS(priv, "Rssi %d noise %d qual %d sig_avg %d noise_diff %d\n",
676 rx_status.signal, rx_status.noise, rx_status.qual,
677 rx_stats_sig_avg, rx_stats_noise_diff);
678
679 header = (struct ieee80211_hdr *)IWL_RX_DATA(pkt);
680
681 network_packet = iwl3945_is_network_packet(priv, header);
682
683 IWL_DEBUG_STATS_LIMIT(priv, "[%c] %d RSSI:%d Signal:%u, Noise:%u, Rate:%u\n",
684 network_packet ? '*' : ' ',
685 le16_to_cpu(rx_hdr->channel),
686 rx_status.signal, rx_status.signal,
687 rx_status.noise, rx_status.rate_idx);
688
689 /* Set "1" to report good data frames in groups of 100 */
690 iwl3945_dbg_report_frame(priv, pkt, header, 1);
691
692 if (network_packet) {
693 priv->last_beacon_time = le32_to_cpu(rx_end->beacon_timestamp);
694 priv->last_tsf = le64_to_cpu(rx_end->timestamp);
695 priv->last_rx_rssi = rx_status.signal;
696 priv->last_rx_noise = rx_status.noise;
697 }
698
699 iwl3945_pass_packet_to_mac80211(priv, rxb, &rx_status);
700 }
701
702 int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
703 struct iwl_tx_queue *txq,
704 dma_addr_t addr, u16 len, u8 reset, u8 pad)
705 {
706 int count;
707 struct iwl_queue *q;
708 struct iwl3945_tfd *tfd, *tfd_tmp;
709
710 q = &txq->q;
711 tfd_tmp = (struct iwl3945_tfd *)txq->tfds;
712 tfd = &tfd_tmp[q->write_ptr];
713
714 if (reset)
715 memset(tfd, 0, sizeof(*tfd));
716
717 count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
718
719 if ((count >= NUM_TFD_CHUNKS) || (count < 0)) {
720 IWL_ERR(priv, "Error can not send more than %d chunks\n",
721 NUM_TFD_CHUNKS);
722 return -EINVAL;
723 }
724
725 tfd->tbs[count].addr = cpu_to_le32(addr);
726 tfd->tbs[count].len = cpu_to_le32(len);
727
728 count++;
729
730 tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(count) |
731 TFD_CTL_PAD_SET(pad));
732
733 return 0;
734 }
735
736 /**
737 * iwl3945_hw_txq_free_tfd - Free one TFD, those at index [txq->q.read_ptr]
738 *
739 * Does NOT advance any indexes
740 */
741 void iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
742 {
743 struct iwl3945_tfd *tfd_tmp = (struct iwl3945_tfd *)txq->tfds;
744 int index = txq->q.read_ptr;
745 struct iwl3945_tfd *tfd = &tfd_tmp[index];
746 struct pci_dev *dev = priv->pci_dev;
747 int i;
748 int counter;
749
750 /* sanity check */
751 counter = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
752 if (counter > NUM_TFD_CHUNKS) {
753 IWL_ERR(priv, "Too many chunks: %i\n", counter);
754 /* @todo issue fatal error, it is quite serious situation */
755 return;
756 }
757
758 /* Unmap tx_cmd */
759 if (counter)
760 pci_unmap_single(dev,
761 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
762 pci_unmap_len(&txq->cmd[index]->meta, len),
763 PCI_DMA_TODEVICE);
764
765 /* unmap chunks if any */
766
767 for (i = 1; i < counter; i++) {
768 pci_unmap_single(dev, le32_to_cpu(tfd->tbs[i].addr),
769 le32_to_cpu(tfd->tbs[i].len), PCI_DMA_TODEVICE);
770 if (txq->txb[txq->q.read_ptr].skb[0]) {
771 struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
772 if (txq->txb[txq->q.read_ptr].skb[0]) {
773 /* Can be called from interrupt context */
774 dev_kfree_skb_any(skb);
775 txq->txb[txq->q.read_ptr].skb[0] = NULL;
776 }
777 }
778 }
779 return ;
780 }
781
782 u8 iwl3945_hw_find_station(struct iwl_priv *priv, const u8 *addr)
783 {
784 int i, start = IWL_AP_ID;
785 int ret = IWL_INVALID_STATION;
786 unsigned long flags;
787
788 if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) ||
789 (priv->iw_mode == NL80211_IFTYPE_AP))
790 start = IWL_STA_ID;
791
792 if (is_broadcast_ether_addr(addr))
793 return priv->hw_params.bcast_sta_id;
794
795 spin_lock_irqsave(&priv->sta_lock, flags);
796 for (i = start; i < priv->hw_params.max_stations; i++)
797 if ((priv->stations_39[i].used) &&
798 (!compare_ether_addr
799 (priv->stations_39[i].sta.sta.addr, addr))) {
800 ret = i;
801 goto out;
802 }
803
804 IWL_DEBUG_INFO(priv, "can not find STA %pM (total %d)\n",
805 addr, priv->num_stations);
806 out:
807 spin_unlock_irqrestore(&priv->sta_lock, flags);
808 return ret;
809 }
810
811 /**
812 * iwl3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
813 *
814 */
815 void iwl3945_hw_build_tx_cmd_rate(struct iwl_priv *priv, struct iwl_cmd *cmd,
816 struct ieee80211_tx_info *info,
817 struct ieee80211_hdr *hdr, int sta_id, int tx_id)
818 {
819 u16 hw_value = ieee80211_get_tx_rate(priv->hw, info)->hw_value;
820 u16 rate_index = min(hw_value & 0xffff, IWL_RATE_COUNT - 1);
821 u16 rate_mask;
822 int rate;
823 u8 rts_retry_limit;
824 u8 data_retry_limit;
825 __le32 tx_flags;
826 __le16 fc = hdr->frame_control;
827 struct iwl3945_tx_cmd *tx = (struct iwl3945_tx_cmd *)cmd->cmd.payload;
828
829 rate = iwl3945_rates[rate_index].plcp;
830 tx_flags = tx->tx_flags;
831
832 /* We need to figure out how to get the sta->supp_rates while
833 * in this running context */
834 rate_mask = IWL_RATES_MASK;
835
836 if (tx_id >= IWL_CMD_QUEUE_NUM)
837 rts_retry_limit = 3;
838 else
839 rts_retry_limit = 7;
840
841 if (ieee80211_is_probe_resp(fc)) {
842 data_retry_limit = 3;
843 if (data_retry_limit < rts_retry_limit)
844 rts_retry_limit = data_retry_limit;
845 } else
846 data_retry_limit = IWL_DEFAULT_TX_RETRY;
847
848 if (priv->data_retry_limit != -1)
849 data_retry_limit = priv->data_retry_limit;
850
851 if (ieee80211_is_mgmt(fc)) {
852 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
853 case cpu_to_le16(IEEE80211_STYPE_AUTH):
854 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
855 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
856 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
857 if (tx_flags & TX_CMD_FLG_RTS_MSK) {
858 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
859 tx_flags |= TX_CMD_FLG_CTS_MSK;
860 }
861 break;
862 default:
863 break;
864 }
865 }
866
867 tx->rts_retry_limit = rts_retry_limit;
868 tx->data_retry_limit = data_retry_limit;
869 tx->rate = rate;
870 tx->tx_flags = tx_flags;
871
872 /* OFDM */
873 tx->supp_rates[0] =
874 ((rate_mask & IWL_OFDM_RATES_MASK) >> IWL_FIRST_OFDM_RATE) & 0xFF;
875
876 /* CCK */
877 tx->supp_rates[1] = (rate_mask & 0xF);
878
879 IWL_DEBUG_RATE(priv, "Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
880 "cck/ofdm mask: 0x%x/0x%x\n", sta_id,
881 tx->rate, le32_to_cpu(tx->tx_flags),
882 tx->supp_rates[1], tx->supp_rates[0]);
883 }
884
885 u8 iwl3945_sync_sta(struct iwl_priv *priv, int sta_id, u16 tx_rate, u8 flags)
886 {
887 unsigned long flags_spin;
888 struct iwl3945_station_entry *station;
889
890 if (sta_id == IWL_INVALID_STATION)
891 return IWL_INVALID_STATION;
892
893 spin_lock_irqsave(&priv->sta_lock, flags_spin);
894 station = &priv->stations_39[sta_id];
895
896 station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
897 station->sta.rate_n_flags = cpu_to_le16(tx_rate);
898 station->sta.mode = STA_CONTROL_MODIFY_MSK;
899
900 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
901
902 iwl_send_add_sta(priv,
903 (struct iwl_addsta_cmd *)&station->sta, flags);
904 IWL_DEBUG_RATE(priv, "SCALE sync station %d to rate %d\n",
905 sta_id, tx_rate);
906 return sta_id;
907 }
908
909 static int iwl3945_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
910 {
911 int ret;
912 unsigned long flags;
913
914 spin_lock_irqsave(&priv->lock, flags);
915 ret = iwl_grab_nic_access(priv);
916 if (ret) {
917 spin_unlock_irqrestore(&priv->lock, flags);
918 return ret;
919 }
920
921 if (src == IWL_PWR_SRC_VAUX) {
922 if (pci_pme_capable(priv->pci_dev, PCI_D3cold)) {
923 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
924 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
925 ~APMG_PS_CTRL_MSK_PWR_SRC);
926 iwl_release_nic_access(priv);
927
928 iwl_poll_bit(priv, CSR_GPIO_IN,
929 CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
930 CSR_GPIO_IN_BIT_AUX_POWER, 5000);
931 } else {
932 iwl_release_nic_access(priv);
933 }
934 } else {
935 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
936 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
937 ~APMG_PS_CTRL_MSK_PWR_SRC);
938
939 iwl_release_nic_access(priv);
940 iwl_poll_bit(priv, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
941 CSR_GPIO_IN_BIT_AUX_POWER, 5000); /* uS */
942 }
943 spin_unlock_irqrestore(&priv->lock, flags);
944
945 return ret;
946 }
947
948 static int iwl3945_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
949 {
950 int rc;
951 unsigned long flags;
952
953 spin_lock_irqsave(&priv->lock, flags);
954 rc = iwl_grab_nic_access(priv);
955 if (rc) {
956 spin_unlock_irqrestore(&priv->lock, flags);
957 return rc;
958 }
959
960 iwl_write_direct32(priv, FH39_RCSR_RBD_BASE(0), rxq->dma_addr);
961 iwl_write_direct32(priv, FH39_RCSR_RPTR_ADDR(0), rxq->rb_stts_dma);
962 iwl_write_direct32(priv, FH39_RCSR_WPTR(0), 0);
963 iwl_write_direct32(priv, FH39_RCSR_CONFIG(0),
964 FH39_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
965 FH39_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
966 FH39_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
967 FH39_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 |
968 (RX_QUEUE_SIZE_LOG << FH39_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE) |
969 FH39_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST |
970 (1 << FH39_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH) |
971 FH39_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
972
973 /* fake read to flush all prev I/O */
974 iwl_read_direct32(priv, FH39_RSSR_CTRL);
975
976 iwl_release_nic_access(priv);
977 spin_unlock_irqrestore(&priv->lock, flags);
978
979 return 0;
980 }
981
982 static int iwl3945_tx_reset(struct iwl_priv *priv)
983 {
984 int rc;
985 unsigned long flags;
986
987 spin_lock_irqsave(&priv->lock, flags);
988 rc = iwl_grab_nic_access(priv);
989 if (rc) {
990 spin_unlock_irqrestore(&priv->lock, flags);
991 return rc;
992 }
993
994 /* bypass mode */
995 iwl_write_prph(priv, ALM_SCD_MODE_REG, 0x2);
996
997 /* RA 0 is active */
998 iwl_write_prph(priv, ALM_SCD_ARASTAT_REG, 0x01);
999
1000 /* all 6 fifo are active */
1001 iwl_write_prph(priv, ALM_SCD_TXFACT_REG, 0x3f);
1002
1003 iwl_write_prph(priv, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
1004 iwl_write_prph(priv, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
1005 iwl_write_prph(priv, ALM_SCD_TXF4MF_REG, 0x000004);
1006 iwl_write_prph(priv, ALM_SCD_TXF5MF_REG, 0x000005);
1007
1008 iwl_write_direct32(priv, FH39_TSSR_CBB_BASE,
1009 priv->shared_phys);
1010
1011 iwl_write_direct32(priv, FH39_TSSR_MSG_CONFIG,
1012 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
1013 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
1014 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
1015 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
1016 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
1017 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
1018 FH39_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
1019
1020 iwl_release_nic_access(priv);
1021 spin_unlock_irqrestore(&priv->lock, flags);
1022
1023 return 0;
1024 }
1025
1026 /**
1027 * iwl3945_txq_ctx_reset - Reset TX queue context
1028 *
1029 * Destroys all DMA structures and initialize them again
1030 */
1031 static int iwl3945_txq_ctx_reset(struct iwl_priv *priv)
1032 {
1033 int rc;
1034 int txq_id, slots_num;
1035
1036 iwl3945_hw_txq_ctx_free(priv);
1037
1038 /* Tx CMD queue */
1039 rc = iwl3945_tx_reset(priv);
1040 if (rc)
1041 goto error;
1042
1043 /* Tx queue(s) */
1044 for (txq_id = 0; txq_id <= priv->hw_params.max_txq_num; txq_id++) {
1045 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
1046 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
1047 rc = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
1048 txq_id);
1049 if (rc) {
1050 IWL_ERR(priv, "Tx %d queue init failed\n", txq_id);
1051 goto error;
1052 }
1053 }
1054
1055 return rc;
1056
1057 error:
1058 iwl3945_hw_txq_ctx_free(priv);
1059 return rc;
1060 }
1061
1062 static int iwl3945_apm_init(struct iwl_priv *priv)
1063 {
1064 int ret = 0;
1065
1066 iwl_power_initialize(priv);
1067
1068 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1069 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1070
1071 /* disable L0s without affecting L1 :don't wait for ICH L0s bug W/A) */
1072 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1073 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1074
1075 /* set "initialization complete" bit to move adapter
1076 * D0U* --> D0A* state */
1077 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1078
1079 ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
1080 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1081 if (ret < 0) {
1082 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1083 goto out;
1084 }
1085
1086 ret = iwl_grab_nic_access(priv);
1087 if (ret)
1088 goto out;
1089
1090 /* enable DMA */
1091 iwl_write_prph(priv, APMG_CLK_CTRL_REG, APMG_CLK_VAL_DMA_CLK_RQT |
1092 APMG_CLK_VAL_BSM_CLK_RQT);
1093
1094 udelay(20);
1095
1096 /* disable L1-Active */
1097 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1098 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1099
1100 iwl_release_nic_access(priv);
1101 out:
1102 return ret;
1103 }
1104
1105 static void iwl3945_nic_config(struct iwl_priv *priv)
1106 {
1107 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
1108 unsigned long flags;
1109 u8 rev_id = 0;
1110
1111 spin_lock_irqsave(&priv->lock, flags);
1112
1113 if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
1114 IWL_DEBUG_INFO(priv, "RTP type \n");
1115 else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
1116 IWL_DEBUG_INFO(priv, "3945 RADIO-MB type\n");
1117 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1118 CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
1119 } else {
1120 IWL_DEBUG_INFO(priv, "3945 RADIO-MM type\n");
1121 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1122 CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
1123 }
1124
1125 if (EEPROM_SKU_CAP_OP_MODE_MRC == eeprom->sku_cap) {
1126 IWL_DEBUG_INFO(priv, "SKU OP mode is mrc\n");
1127 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1128 CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
1129 } else
1130 IWL_DEBUG_INFO(priv, "SKU OP mode is basic\n");
1131
1132 if ((eeprom->board_revision & 0xF0) == 0xD0) {
1133 IWL_DEBUG_INFO(priv, "3945ABG revision is 0x%X\n",
1134 eeprom->board_revision);
1135 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1136 CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1137 } else {
1138 IWL_DEBUG_INFO(priv, "3945ABG revision is 0x%X\n",
1139 eeprom->board_revision);
1140 iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
1141 CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
1142 }
1143
1144 if (eeprom->almgor_m_version <= 1) {
1145 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1146 CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
1147 IWL_DEBUG_INFO(priv, "Card M type A version is 0x%X\n",
1148 eeprom->almgor_m_version);
1149 } else {
1150 IWL_DEBUG_INFO(priv, "Card M type B version is 0x%X\n",
1151 eeprom->almgor_m_version);
1152 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1153 CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
1154 }
1155 spin_unlock_irqrestore(&priv->lock, flags);
1156
1157 if (eeprom->sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
1158 IWL_DEBUG_RF_KILL(priv, "SW RF KILL supported in EEPROM.\n");
1159
1160 if (eeprom->sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
1161 IWL_DEBUG_RF_KILL(priv, "HW RF KILL supported in EEPROM.\n");
1162 }
1163
1164 int iwl3945_hw_nic_init(struct iwl_priv *priv)
1165 {
1166 u8 rev_id;
1167 int rc;
1168 unsigned long flags;
1169 struct iwl_rx_queue *rxq = &priv->rxq;
1170
1171 spin_lock_irqsave(&priv->lock, flags);
1172 priv->cfg->ops->lib->apm_ops.init(priv);
1173 spin_unlock_irqrestore(&priv->lock, flags);
1174
1175 /* Determine HW type */
1176 rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
1177 if (rc)
1178 return rc;
1179 IWL_DEBUG_INFO(priv, "HW Revision ID = 0x%X\n", rev_id);
1180
1181 rc = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
1182 if (rc)
1183 return rc;
1184
1185 priv->cfg->ops->lib->apm_ops.config(priv);
1186
1187 /* Allocate the RX queue, or reset if it is already allocated */
1188 if (!rxq->bd) {
1189 rc = iwl_rx_queue_alloc(priv);
1190 if (rc) {
1191 IWL_ERR(priv, "Unable to initialize Rx queue\n");
1192 return -ENOMEM;
1193 }
1194 } else
1195 iwl3945_rx_queue_reset(priv, rxq);
1196
1197 iwl3945_rx_replenish(priv);
1198
1199 iwl3945_rx_init(priv, rxq);
1200
1201 spin_lock_irqsave(&priv->lock, flags);
1202
1203 /* Look at using this instead:
1204 rxq->need_update = 1;
1205 iwl_rx_queue_update_write_ptr(priv, rxq);
1206 */
1207
1208 rc = iwl_grab_nic_access(priv);
1209 if (rc) {
1210 spin_unlock_irqrestore(&priv->lock, flags);
1211 return rc;
1212 }
1213 iwl_write_direct32(priv, FH39_RCSR_WPTR(0), rxq->write & ~7);
1214 iwl_release_nic_access(priv);
1215
1216 spin_unlock_irqrestore(&priv->lock, flags);
1217
1218 rc = iwl3945_txq_ctx_reset(priv);
1219 if (rc)
1220 return rc;
1221
1222 set_bit(STATUS_INIT, &priv->status);
1223
1224 return 0;
1225 }
1226
1227 /**
1228 * iwl3945_hw_txq_ctx_free - Free TXQ Context
1229 *
1230 * Destroy all TX DMA queues and structures
1231 */
1232 void iwl3945_hw_txq_ctx_free(struct iwl_priv *priv)
1233 {
1234 int txq_id;
1235
1236 /* Tx queues */
1237 for (txq_id = 0; txq_id <= priv->hw_params.max_txq_num; txq_id++)
1238 if (txq_id == IWL_CMD_QUEUE_NUM)
1239 iwl_cmd_queue_free(priv);
1240 else
1241 iwl_tx_queue_free(priv, txq_id);
1242
1243 }
1244
1245 void iwl3945_hw_txq_ctx_stop(struct iwl_priv *priv)
1246 {
1247 int txq_id;
1248 unsigned long flags;
1249
1250 spin_lock_irqsave(&priv->lock, flags);
1251 if (iwl_grab_nic_access(priv)) {
1252 spin_unlock_irqrestore(&priv->lock, flags);
1253 iwl3945_hw_txq_ctx_free(priv);
1254 return;
1255 }
1256
1257 /* stop SCD */
1258 iwl_write_prph(priv, ALM_SCD_MODE_REG, 0);
1259
1260 /* reset TFD queues */
1261 for (txq_id = 0; txq_id <= priv->hw_params.max_txq_num; txq_id++) {
1262 iwl_write_direct32(priv, FH39_TCSR_CONFIG(txq_id), 0x0);
1263 iwl_poll_direct_bit(priv, FH39_TSSR_TX_STATUS,
1264 FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
1265 1000);
1266 }
1267
1268 iwl_release_nic_access(priv);
1269 spin_unlock_irqrestore(&priv->lock, flags);
1270
1271 iwl3945_hw_txq_ctx_free(priv);
1272 }
1273
1274 static int iwl3945_apm_stop_master(struct iwl_priv *priv)
1275 {
1276 int ret = 0;
1277 unsigned long flags;
1278
1279 spin_lock_irqsave(&priv->lock, flags);
1280
1281 /* set stop master bit */
1282 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1283
1284 iwl_poll_direct_bit(priv, CSR_RESET,
1285 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1286
1287 if (ret < 0)
1288 goto out;
1289
1290 out:
1291 spin_unlock_irqrestore(&priv->lock, flags);
1292 IWL_DEBUG_INFO(priv, "stop master\n");
1293
1294 return ret;
1295 }
1296
1297 static void iwl3945_apm_stop(struct iwl_priv *priv)
1298 {
1299 unsigned long flags;
1300
1301 iwl3945_apm_stop_master(priv);
1302
1303 spin_lock_irqsave(&priv->lock, flags);
1304
1305 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1306
1307 udelay(10);
1308 /* clear "init complete" move adapter D0A* --> D0U state */
1309 iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1310 spin_unlock_irqrestore(&priv->lock, flags);
1311 }
1312
1313 static int iwl3945_apm_reset(struct iwl_priv *priv)
1314 {
1315 int rc;
1316 unsigned long flags;
1317
1318 iwl3945_apm_stop_master(priv);
1319
1320 spin_lock_irqsave(&priv->lock, flags);
1321
1322 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1323 udelay(10);
1324
1325 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1326
1327 iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
1328 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1329
1330 rc = iwl_grab_nic_access(priv);
1331 if (!rc) {
1332 iwl_write_prph(priv, APMG_CLK_CTRL_REG,
1333 APMG_CLK_VAL_BSM_CLK_RQT);
1334
1335 iwl_write_prph(priv, APMG_RTC_INT_MSK_REG, 0x0);
1336 iwl_write_prph(priv, APMG_RTC_INT_STT_REG,
1337 0xFFFFFFFF);
1338
1339 /* enable DMA */
1340 iwl_write_prph(priv, APMG_CLK_EN_REG,
1341 APMG_CLK_VAL_DMA_CLK_RQT |
1342 APMG_CLK_VAL_BSM_CLK_RQT);
1343 udelay(10);
1344
1345 iwl_set_bits_prph(priv, APMG_PS_CTRL_REG,
1346 APMG_PS_CTRL_VAL_RESET_REQ);
1347 udelay(5);
1348 iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG,
1349 APMG_PS_CTRL_VAL_RESET_REQ);
1350 iwl_release_nic_access(priv);
1351 }
1352
1353 /* Clear the 'host command active' bit... */
1354 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1355
1356 wake_up_interruptible(&priv->wait_command_queue);
1357 spin_unlock_irqrestore(&priv->lock, flags);
1358
1359 return rc;
1360 }
1361
1362 /**
1363 * iwl3945_hw_reg_adjust_power_by_temp
1364 * return index delta into power gain settings table
1365 */
1366 static int iwl3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1367 {
1368 return (new_reading - old_reading) * (-11) / 100;
1369 }
1370
1371 /**
1372 * iwl3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1373 */
1374 static inline int iwl3945_hw_reg_temp_out_of_range(int temperature)
1375 {
1376 return ((temperature < -260) || (temperature > 25)) ? 1 : 0;
1377 }
1378
1379 int iwl3945_hw_get_temperature(struct iwl_priv *priv)
1380 {
1381 return iwl_read32(priv, CSR_UCODE_DRV_GP2);
1382 }
1383
1384 /**
1385 * iwl3945_hw_reg_txpower_get_temperature
1386 * get the current temperature by reading from NIC
1387 */
1388 static int iwl3945_hw_reg_txpower_get_temperature(struct iwl_priv *priv)
1389 {
1390 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
1391 int temperature;
1392
1393 temperature = iwl3945_hw_get_temperature(priv);
1394
1395 /* driver's okay range is -260 to +25.
1396 * human readable okay range is 0 to +285 */
1397 IWL_DEBUG_INFO(priv, "Temperature: %d\n", temperature + IWL_TEMP_CONVERT);
1398
1399 /* handle insane temp reading */
1400 if (iwl3945_hw_reg_temp_out_of_range(temperature)) {
1401 IWL_ERR(priv, "Error bad temperature value %d\n", temperature);
1402
1403 /* if really really hot(?),
1404 * substitute the 3rd band/group's temp measured at factory */
1405 if (priv->last_temperature > 100)
1406 temperature = eeprom->groups[2].temperature;
1407 else /* else use most recent "sane" value from driver */
1408 temperature = priv->last_temperature;
1409 }
1410
1411 return temperature; /* raw, not "human readable" */
1412 }
1413
1414 /* Adjust Txpower only if temperature variance is greater than threshold.
1415 *
1416 * Both are lower than older versions' 9 degrees */
1417 #define IWL_TEMPERATURE_LIMIT_TIMER 6
1418
1419 /**
1420 * is_temp_calib_needed - determines if new calibration is needed
1421 *
1422 * records new temperature in tx_mgr->temperature.
1423 * replaces tx_mgr->last_temperature *only* if calib needed
1424 * (assumes caller will actually do the calibration!). */
1425 static int is_temp_calib_needed(struct iwl_priv *priv)
1426 {
1427 int temp_diff;
1428
1429 priv->temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
1430 temp_diff = priv->temperature - priv->last_temperature;
1431
1432 /* get absolute value */
1433 if (temp_diff < 0) {
1434 IWL_DEBUG_POWER(priv, "Getting cooler, delta %d,\n", temp_diff);
1435 temp_diff = -temp_diff;
1436 } else if (temp_diff == 0)
1437 IWL_DEBUG_POWER(priv, "Same temp,\n");
1438 else
1439 IWL_DEBUG_POWER(priv, "Getting warmer, delta %d,\n", temp_diff);
1440
1441 /* if we don't need calibration, *don't* update last_temperature */
1442 if (temp_diff < IWL_TEMPERATURE_LIMIT_TIMER) {
1443 IWL_DEBUG_POWER(priv, "Timed thermal calib not needed\n");
1444 return 0;
1445 }
1446
1447 IWL_DEBUG_POWER(priv, "Timed thermal calib needed\n");
1448
1449 /* assume that caller will actually do calib ...
1450 * update the "last temperature" value */
1451 priv->last_temperature = priv->temperature;
1452 return 1;
1453 }
1454
1455 #define IWL_MAX_GAIN_ENTRIES 78
1456 #define IWL_CCK_FROM_OFDM_POWER_DIFF -5
1457 #define IWL_CCK_FROM_OFDM_INDEX_DIFF (10)
1458
1459 /* radio and DSP power table, each step is 1/2 dB.
1460 * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1461 static struct iwl3945_tx_power power_gain_table[2][IWL_MAX_GAIN_ENTRIES] = {
1462 {
1463 {251, 127}, /* 2.4 GHz, highest power */
1464 {251, 127},
1465 {251, 127},
1466 {251, 127},
1467 {251, 125},
1468 {251, 110},
1469 {251, 105},
1470 {251, 98},
1471 {187, 125},
1472 {187, 115},
1473 {187, 108},
1474 {187, 99},
1475 {243, 119},
1476 {243, 111},
1477 {243, 105},
1478 {243, 97},
1479 {243, 92},
1480 {211, 106},
1481 {211, 100},
1482 {179, 120},
1483 {179, 113},
1484 {179, 107},
1485 {147, 125},
1486 {147, 119},
1487 {147, 112},
1488 {147, 106},
1489 {147, 101},
1490 {147, 97},
1491 {147, 91},
1492 {115, 107},
1493 {235, 121},
1494 {235, 115},
1495 {235, 109},
1496 {203, 127},
1497 {203, 121},
1498 {203, 115},
1499 {203, 108},
1500 {203, 102},
1501 {203, 96},
1502 {203, 92},
1503 {171, 110},
1504 {171, 104},
1505 {171, 98},
1506 {139, 116},
1507 {227, 125},
1508 {227, 119},
1509 {227, 113},
1510 {227, 107},
1511 {227, 101},
1512 {227, 96},
1513 {195, 113},
1514 {195, 106},
1515 {195, 102},
1516 {195, 95},
1517 {163, 113},
1518 {163, 106},
1519 {163, 102},
1520 {163, 95},
1521 {131, 113},
1522 {131, 106},
1523 {131, 102},
1524 {131, 95},
1525 {99, 113},
1526 {99, 106},
1527 {99, 102},
1528 {99, 95},
1529 {67, 113},
1530 {67, 106},
1531 {67, 102},
1532 {67, 95},
1533 {35, 113},
1534 {35, 106},
1535 {35, 102},
1536 {35, 95},
1537 {3, 113},
1538 {3, 106},
1539 {3, 102},
1540 {3, 95} }, /* 2.4 GHz, lowest power */
1541 {
1542 {251, 127}, /* 5.x GHz, highest power */
1543 {251, 120},
1544 {251, 114},
1545 {219, 119},
1546 {219, 101},
1547 {187, 113},
1548 {187, 102},
1549 {155, 114},
1550 {155, 103},
1551 {123, 117},
1552 {123, 107},
1553 {123, 99},
1554 {123, 92},
1555 {91, 108},
1556 {59, 125},
1557 {59, 118},
1558 {59, 109},
1559 {59, 102},
1560 {59, 96},
1561 {59, 90},
1562 {27, 104},
1563 {27, 98},
1564 {27, 92},
1565 {115, 118},
1566 {115, 111},
1567 {115, 104},
1568 {83, 126},
1569 {83, 121},
1570 {83, 113},
1571 {83, 105},
1572 {83, 99},
1573 {51, 118},
1574 {51, 111},
1575 {51, 104},
1576 {51, 98},
1577 {19, 116},
1578 {19, 109},
1579 {19, 102},
1580 {19, 98},
1581 {19, 93},
1582 {171, 113},
1583 {171, 107},
1584 {171, 99},
1585 {139, 120},
1586 {139, 113},
1587 {139, 107},
1588 {139, 99},
1589 {107, 120},
1590 {107, 113},
1591 {107, 107},
1592 {107, 99},
1593 {75, 120},
1594 {75, 113},
1595 {75, 107},
1596 {75, 99},
1597 {43, 120},
1598 {43, 113},
1599 {43, 107},
1600 {43, 99},
1601 {11, 120},
1602 {11, 113},
1603 {11, 107},
1604 {11, 99},
1605 {131, 107},
1606 {131, 99},
1607 {99, 120},
1608 {99, 113},
1609 {99, 107},
1610 {99, 99},
1611 {67, 120},
1612 {67, 113},
1613 {67, 107},
1614 {67, 99},
1615 {35, 120},
1616 {35, 113},
1617 {35, 107},
1618 {35, 99},
1619 {3, 120} } /* 5.x GHz, lowest power */
1620 };
1621
1622 static inline u8 iwl3945_hw_reg_fix_power_index(int index)
1623 {
1624 if (index < 0)
1625 return 0;
1626 if (index >= IWL_MAX_GAIN_ENTRIES)
1627 return IWL_MAX_GAIN_ENTRIES - 1;
1628 return (u8) index;
1629 }
1630
1631 /* Kick off thermal recalibration check every 60 seconds */
1632 #define REG_RECALIB_PERIOD (60)
1633
1634 /**
1635 * iwl3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1636 *
1637 * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1638 * or 6 Mbit (OFDM) rates.
1639 */
1640 static void iwl3945_hw_reg_set_scan_power(struct iwl_priv *priv, u32 scan_tbl_index,
1641 s32 rate_index, const s8 *clip_pwrs,
1642 struct iwl_channel_info *ch_info,
1643 int band_index)
1644 {
1645 struct iwl3945_scan_power_info *scan_power_info;
1646 s8 power;
1647 u8 power_index;
1648
1649 scan_power_info = &ch_info->scan_pwr_info[scan_tbl_index];
1650
1651 /* use this channel group's 6Mbit clipping/saturation pwr,
1652 * but cap at regulatory scan power restriction (set during init
1653 * based on eeprom channel data) for this channel. */
1654 power = min(ch_info->scan_power, clip_pwrs[IWL_RATE_6M_INDEX_TABLE]);
1655
1656 /* further limit to user's max power preference.
1657 * FIXME: Other spectrum management power limitations do not
1658 * seem to apply?? */
1659 power = min(power, priv->tx_power_user_lmt);
1660 scan_power_info->requested_power = power;
1661
1662 /* find difference between new scan *power* and current "normal"
1663 * Tx *power* for 6Mb. Use this difference (x2) to adjust the
1664 * current "normal" temperature-compensated Tx power *index* for
1665 * this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1666 * *index*. */
1667 power_index = ch_info->power_info[rate_index].power_table_index
1668 - (power - ch_info->power_info
1669 [IWL_RATE_6M_INDEX_TABLE].requested_power) * 2;
1670
1671 /* store reference index that we use when adjusting *all* scan
1672 * powers. So we can accommodate user (all channel) or spectrum
1673 * management (single channel) power changes "between" temperature
1674 * feedback compensation procedures.
1675 * don't force fit this reference index into gain table; it may be a
1676 * negative number. This will help avoid errors when we're at
1677 * the lower bounds (highest gains, for warmest temperatures)
1678 * of the table. */
1679
1680 /* don't exceed table bounds for "real" setting */
1681 power_index = iwl3945_hw_reg_fix_power_index(power_index);
1682
1683 scan_power_info->power_table_index = power_index;
1684 scan_power_info->tpc.tx_gain =
1685 power_gain_table[band_index][power_index].tx_gain;
1686 scan_power_info->tpc.dsp_atten =
1687 power_gain_table[band_index][power_index].dsp_atten;
1688 }
1689
1690 /**
1691 * iwl3945_send_tx_power - fill in Tx Power command with gain settings
1692 *
1693 * Configures power settings for all rates for the current channel,
1694 * using values from channel info struct, and send to NIC
1695 */
1696 static int iwl3945_send_tx_power(struct iwl_priv *priv)
1697 {
1698 int rate_idx, i;
1699 const struct iwl_channel_info *ch_info = NULL;
1700 struct iwl3945_txpowertable_cmd txpower = {
1701 .channel = priv->active_rxon.channel,
1702 };
1703
1704 txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1705 ch_info = iwl_get_channel_info(priv,
1706 priv->band,
1707 le16_to_cpu(priv->active_rxon.channel));
1708 if (!ch_info) {
1709 IWL_ERR(priv,
1710 "Failed to get channel info for channel %d [%d]\n",
1711 le16_to_cpu(priv->active_rxon.channel), priv->band);
1712 return -EINVAL;
1713 }
1714
1715 if (!is_channel_valid(ch_info)) {
1716 IWL_DEBUG_POWER(priv, "Not calling TX_PWR_TABLE_CMD on "
1717 "non-Tx channel.\n");
1718 return 0;
1719 }
1720
1721 /* fill cmd with power settings for all rates for current channel */
1722 /* Fill OFDM rate */
1723 for (rate_idx = IWL_FIRST_OFDM_RATE, i = 0;
1724 rate_idx <= IWL39_LAST_OFDM_RATE; rate_idx++, i++) {
1725
1726 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1727 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1728
1729 IWL_DEBUG_POWER(priv, "ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1730 le16_to_cpu(txpower.channel),
1731 txpower.band,
1732 txpower.power[i].tpc.tx_gain,
1733 txpower.power[i].tpc.dsp_atten,
1734 txpower.power[i].rate);
1735 }
1736 /* Fill CCK rates */
1737 for (rate_idx = IWL_FIRST_CCK_RATE;
1738 rate_idx <= IWL_LAST_CCK_RATE; rate_idx++, i++) {
1739 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1740 txpower.power[i].rate = iwl3945_rates[rate_idx].plcp;
1741
1742 IWL_DEBUG_POWER(priv, "ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1743 le16_to_cpu(txpower.channel),
1744 txpower.band,
1745 txpower.power[i].tpc.tx_gain,
1746 txpower.power[i].tpc.dsp_atten,
1747 txpower.power[i].rate);
1748 }
1749
1750 return iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD,
1751 sizeof(struct iwl3945_txpowertable_cmd),
1752 &txpower);
1753
1754 }
1755
1756 /**
1757 * iwl3945_hw_reg_set_new_power - Configures power tables at new levels
1758 * @ch_info: Channel to update. Uses power_info.requested_power.
1759 *
1760 * Replace requested_power and base_power_index ch_info fields for
1761 * one channel.
1762 *
1763 * Called if user or spectrum management changes power preferences.
1764 * Takes into account h/w and modulation limitations (clip power).
1765 *
1766 * This does *not* send anything to NIC, just sets up ch_info for one channel.
1767 *
1768 * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1769 * properly fill out the scan powers, and actual h/w gain settings,
1770 * and send changes to NIC
1771 */
1772 static int iwl3945_hw_reg_set_new_power(struct iwl_priv *priv,
1773 struct iwl_channel_info *ch_info)
1774 {
1775 struct iwl3945_channel_power_info *power_info;
1776 int power_changed = 0;
1777 int i;
1778 const s8 *clip_pwrs;
1779 int power;
1780
1781 /* Get this chnlgrp's rate-to-max/clip-powers table */
1782 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
1783
1784 /* Get this channel's rate-to-current-power settings table */
1785 power_info = ch_info->power_info;
1786
1787 /* update OFDM Txpower settings */
1788 for (i = IWL_RATE_6M_INDEX_TABLE; i <= IWL_RATE_54M_INDEX_TABLE;
1789 i++, ++power_info) {
1790 int delta_idx;
1791
1792 /* limit new power to be no more than h/w capability */
1793 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1794 if (power == power_info->requested_power)
1795 continue;
1796
1797 /* find difference between old and new requested powers,
1798 * update base (non-temp-compensated) power index */
1799 delta_idx = (power - power_info->requested_power) * 2;
1800 power_info->base_power_index -= delta_idx;
1801
1802 /* save new requested power value */
1803 power_info->requested_power = power;
1804
1805 power_changed = 1;
1806 }
1807
1808 /* update CCK Txpower settings, based on OFDM 12M setting ...
1809 * ... all CCK power settings for a given channel are the *same*. */
1810 if (power_changed) {
1811 power =
1812 ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1813 requested_power + IWL_CCK_FROM_OFDM_POWER_DIFF;
1814
1815 /* do all CCK rates' iwl3945_channel_power_info structures */
1816 for (i = IWL_RATE_1M_INDEX_TABLE; i <= IWL_RATE_11M_INDEX_TABLE; i++) {
1817 power_info->requested_power = power;
1818 power_info->base_power_index =
1819 ch_info->power_info[IWL_RATE_12M_INDEX_TABLE].
1820 base_power_index + IWL_CCK_FROM_OFDM_INDEX_DIFF;
1821 ++power_info;
1822 }
1823 }
1824
1825 return 0;
1826 }
1827
1828 /**
1829 * iwl3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1830 *
1831 * NOTE: Returned power limit may be less (but not more) than requested,
1832 * based strictly on regulatory (eeprom and spectrum mgt) limitations
1833 * (no consideration for h/w clipping limitations).
1834 */
1835 static int iwl3945_hw_reg_get_ch_txpower_limit(struct iwl_channel_info *ch_info)
1836 {
1837 s8 max_power;
1838
1839 #if 0
1840 /* if we're using TGd limits, use lower of TGd or EEPROM */
1841 if (ch_info->tgd_data.max_power != 0)
1842 max_power = min(ch_info->tgd_data.max_power,
1843 ch_info->eeprom.max_power_avg);
1844
1845 /* else just use EEPROM limits */
1846 else
1847 #endif
1848 max_power = ch_info->eeprom.max_power_avg;
1849
1850 return min(max_power, ch_info->max_power_avg);
1851 }
1852
1853 /**
1854 * iwl3945_hw_reg_comp_txpower_temp - Compensate for temperature
1855 *
1856 * Compensate txpower settings of *all* channels for temperature.
1857 * This only accounts for the difference between current temperature
1858 * and the factory calibration temperatures, and bases the new settings
1859 * on the channel's base_power_index.
1860 *
1861 * If RxOn is "associated", this sends the new Txpower to NIC!
1862 */
1863 static int iwl3945_hw_reg_comp_txpower_temp(struct iwl_priv *priv)
1864 {
1865 struct iwl_channel_info *ch_info = NULL;
1866 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
1867 int delta_index;
1868 const s8 *clip_pwrs; /* array of h/w max power levels for each rate */
1869 u8 a_band;
1870 u8 rate_index;
1871 u8 scan_tbl_index;
1872 u8 i;
1873 int ref_temp;
1874 int temperature = priv->temperature;
1875
1876 /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1877 for (i = 0; i < priv->channel_count; i++) {
1878 ch_info = &priv->channel_info[i];
1879 a_band = is_channel_a_band(ch_info);
1880
1881 /* Get this chnlgrp's factory calibration temperature */
1882 ref_temp = (s16)eeprom->groups[ch_info->group_index].
1883 temperature;
1884
1885 /* get power index adjustment based on current and factory
1886 * temps */
1887 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
1888 ref_temp);
1889
1890 /* set tx power value for all rates, OFDM and CCK */
1891 for (rate_index = 0; rate_index < IWL_RATE_COUNT;
1892 rate_index++) {
1893 int power_idx =
1894 ch_info->power_info[rate_index].base_power_index;
1895
1896 /* temperature compensate */
1897 power_idx += delta_index;
1898
1899 /* stay within table range */
1900 power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
1901 ch_info->power_info[rate_index].
1902 power_table_index = (u8) power_idx;
1903 ch_info->power_info[rate_index].tpc =
1904 power_gain_table[a_band][power_idx];
1905 }
1906
1907 /* Get this chnlgrp's rate-to-max/clip-powers table */
1908 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
1909
1910 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1911 for (scan_tbl_index = 0;
1912 scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
1913 s32 actual_index = (scan_tbl_index == 0) ?
1914 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
1915 iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
1916 actual_index, clip_pwrs,
1917 ch_info, a_band);
1918 }
1919 }
1920
1921 /* send Txpower command for current channel to ucode */
1922 return priv->cfg->ops->lib->send_tx_power(priv);
1923 }
1924
1925 int iwl3945_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1926 {
1927 struct iwl_channel_info *ch_info;
1928 s8 max_power;
1929 u8 a_band;
1930 u8 i;
1931
1932 if (priv->tx_power_user_lmt == power) {
1933 IWL_DEBUG_POWER(priv, "Requested Tx power same as current "
1934 "limit: %ddBm.\n", power);
1935 return 0;
1936 }
1937
1938 IWL_DEBUG_POWER(priv, "Setting upper limit clamp to %ddBm.\n", power);
1939 priv->tx_power_user_lmt = power;
1940
1941 /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1942
1943 for (i = 0; i < priv->channel_count; i++) {
1944 ch_info = &priv->channel_info[i];
1945 a_band = is_channel_a_band(ch_info);
1946
1947 /* find minimum power of all user and regulatory constraints
1948 * (does not consider h/w clipping limitations) */
1949 max_power = iwl3945_hw_reg_get_ch_txpower_limit(ch_info);
1950 max_power = min(power, max_power);
1951 if (max_power != ch_info->curr_txpow) {
1952 ch_info->curr_txpow = max_power;
1953
1954 /* this considers the h/w clipping limitations */
1955 iwl3945_hw_reg_set_new_power(priv, ch_info);
1956 }
1957 }
1958
1959 /* update txpower settings for all channels,
1960 * send to NIC if associated. */
1961 is_temp_calib_needed(priv);
1962 iwl3945_hw_reg_comp_txpower_temp(priv);
1963
1964 return 0;
1965 }
1966
1967 /* will add 3945 channel switch cmd handling later */
1968 int iwl3945_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1969 {
1970 return 0;
1971 }
1972
1973 /**
1974 * iwl3945_reg_txpower_periodic - called when time to check our temperature.
1975 *
1976 * -- reset periodic timer
1977 * -- see if temp has changed enough to warrant re-calibration ... if so:
1978 * -- correct coeffs for temp (can reset temp timer)
1979 * -- save this temp as "last",
1980 * -- send new set of gain settings to NIC
1981 * NOTE: This should continue working, even when we're not associated,
1982 * so we can keep our internal table of scan powers current. */
1983 void iwl3945_reg_txpower_periodic(struct iwl_priv *priv)
1984 {
1985 /* This will kick in the "brute force"
1986 * iwl3945_hw_reg_comp_txpower_temp() below */
1987 if (!is_temp_calib_needed(priv))
1988 goto reschedule;
1989
1990 /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1991 * This is based *only* on current temperature,
1992 * ignoring any previous power measurements */
1993 iwl3945_hw_reg_comp_txpower_temp(priv);
1994
1995 reschedule:
1996 queue_delayed_work(priv->workqueue,
1997 &priv->thermal_periodic, REG_RECALIB_PERIOD * HZ);
1998 }
1999
2000 static void iwl3945_bg_reg_txpower_periodic(struct work_struct *work)
2001 {
2002 struct iwl_priv *priv = container_of(work, struct iwl_priv,
2003 thermal_periodic.work);
2004
2005 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2006 return;
2007
2008 mutex_lock(&priv->mutex);
2009 iwl3945_reg_txpower_periodic(priv);
2010 mutex_unlock(&priv->mutex);
2011 }
2012
2013 /**
2014 * iwl3945_hw_reg_get_ch_grp_index - find the channel-group index (0-4)
2015 * for the channel.
2016 *
2017 * This function is used when initializing channel-info structs.
2018 *
2019 * NOTE: These channel groups do *NOT* match the bands above!
2020 * These channel groups are based on factory-tested channels;
2021 * on A-band, EEPROM's "group frequency" entries represent the top
2022 * channel in each group 1-4. Group 5 All B/G channels are in group 0.
2023 */
2024 static u16 iwl3945_hw_reg_get_ch_grp_index(struct iwl_priv *priv,
2025 const struct iwl_channel_info *ch_info)
2026 {
2027 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
2028 struct iwl3945_eeprom_txpower_group *ch_grp = &eeprom->groups[0];
2029 u8 group;
2030 u16 group_index = 0; /* based on factory calib frequencies */
2031 u8 grp_channel;
2032
2033 /* Find the group index for the channel ... don't use index 1(?) */
2034 if (is_channel_a_band(ch_info)) {
2035 for (group = 1; group < 5; group++) {
2036 grp_channel = ch_grp[group].group_channel;
2037 if (ch_info->channel <= grp_channel) {
2038 group_index = group;
2039 break;
2040 }
2041 }
2042 /* group 4 has a few channels *above* its factory cal freq */
2043 if (group == 5)
2044 group_index = 4;
2045 } else
2046 group_index = 0; /* 2.4 GHz, group 0 */
2047
2048 IWL_DEBUG_POWER(priv, "Chnl %d mapped to grp %d\n", ch_info->channel,
2049 group_index);
2050 return group_index;
2051 }
2052
2053 /**
2054 * iwl3945_hw_reg_get_matched_power_index - Interpolate to get nominal index
2055 *
2056 * Interpolate to get nominal (i.e. at factory calibration temperature) index
2057 * into radio/DSP gain settings table for requested power.
2058 */
2059 static int iwl3945_hw_reg_get_matched_power_index(struct iwl_priv *priv,
2060 s8 requested_power,
2061 s32 setting_index, s32 *new_index)
2062 {
2063 const struct iwl3945_eeprom_txpower_group *chnl_grp = NULL;
2064 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
2065 s32 index0, index1;
2066 s32 power = 2 * requested_power;
2067 s32 i;
2068 const struct iwl3945_eeprom_txpower_sample *samples;
2069 s32 gains0, gains1;
2070 s32 res;
2071 s32 denominator;
2072
2073 chnl_grp = &eeprom->groups[setting_index];
2074 samples = chnl_grp->samples;
2075 for (i = 0; i < 5; i++) {
2076 if (power == samples[i].power) {
2077 *new_index = samples[i].gain_index;
2078 return 0;
2079 }
2080 }
2081
2082 if (power > samples[1].power) {
2083 index0 = 0;
2084 index1 = 1;
2085 } else if (power > samples[2].power) {
2086 index0 = 1;
2087 index1 = 2;
2088 } else if (power > samples[3].power) {
2089 index0 = 2;
2090 index1 = 3;
2091 } else {
2092 index0 = 3;
2093 index1 = 4;
2094 }
2095
2096 denominator = (s32) samples[index1].power - (s32) samples[index0].power;
2097 if (denominator == 0)
2098 return -EINVAL;
2099 gains0 = (s32) samples[index0].gain_index * (1 << 19);
2100 gains1 = (s32) samples[index1].gain_index * (1 << 19);
2101 res = gains0 + (gains1 - gains0) *
2102 ((s32) power - (s32) samples[index0].power) / denominator +
2103 (1 << 18);
2104 *new_index = res >> 19;
2105 return 0;
2106 }
2107
2108 static void iwl3945_hw_reg_init_channel_groups(struct iwl_priv *priv)
2109 {
2110 u32 i;
2111 s32 rate_index;
2112 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
2113 const struct iwl3945_eeprom_txpower_group *group;
2114
2115 IWL_DEBUG_POWER(priv, "Initializing factory calib info from EEPROM\n");
2116
2117 for (i = 0; i < IWL_NUM_TX_CALIB_GROUPS; i++) {
2118 s8 *clip_pwrs; /* table of power levels for each rate */
2119 s8 satur_pwr; /* saturation power for each chnl group */
2120 group = &eeprom->groups[i];
2121
2122 /* sanity check on factory saturation power value */
2123 if (group->saturation_power < 40) {
2124 IWL_WARN(priv, "Error: saturation power is %d, "
2125 "less than minimum expected 40\n",
2126 group->saturation_power);
2127 return;
2128 }
2129
2130 /*
2131 * Derive requested power levels for each rate, based on
2132 * hardware capabilities (saturation power for band).
2133 * Basic value is 3dB down from saturation, with further
2134 * power reductions for highest 3 data rates. These
2135 * backoffs provide headroom for high rate modulation
2136 * power peaks, without too much distortion (clipping).
2137 */
2138 /* we'll fill in this array with h/w max power levels */
2139 clip_pwrs = (s8 *) priv->clip39_groups[i].clip_powers;
2140
2141 /* divide factory saturation power by 2 to find -3dB level */
2142 satur_pwr = (s8) (group->saturation_power >> 1);
2143
2144 /* fill in channel group's nominal powers for each rate */
2145 for (rate_index = 0;
2146 rate_index < IWL_RATE_COUNT; rate_index++, clip_pwrs++) {
2147 switch (rate_index) {
2148 case IWL_RATE_36M_INDEX_TABLE:
2149 if (i == 0) /* B/G */
2150 *clip_pwrs = satur_pwr;
2151 else /* A */
2152 *clip_pwrs = satur_pwr - 5;
2153 break;
2154 case IWL_RATE_48M_INDEX_TABLE:
2155 if (i == 0)
2156 *clip_pwrs = satur_pwr - 7;
2157 else
2158 *clip_pwrs = satur_pwr - 10;
2159 break;
2160 case IWL_RATE_54M_INDEX_TABLE:
2161 if (i == 0)
2162 *clip_pwrs = satur_pwr - 9;
2163 else
2164 *clip_pwrs = satur_pwr - 12;
2165 break;
2166 default:
2167 *clip_pwrs = satur_pwr;
2168 break;
2169 }
2170 }
2171 }
2172 }
2173
2174 /**
2175 * iwl3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2176 *
2177 * Second pass (during init) to set up priv->channel_info
2178 *
2179 * Set up Tx-power settings in our channel info database for each VALID
2180 * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2181 * and current temperature.
2182 *
2183 * Since this is based on current temperature (at init time), these values may
2184 * not be valid for very long, but it gives us a starting/default point,
2185 * and allows us to active (i.e. using Tx) scan.
2186 *
2187 * This does *not* write values to NIC, just sets up our internal table.
2188 */
2189 int iwl3945_txpower_set_from_eeprom(struct iwl_priv *priv)
2190 {
2191 struct iwl_channel_info *ch_info = NULL;
2192 struct iwl3945_channel_power_info *pwr_info;
2193 struct iwl3945_eeprom *eeprom = (struct iwl3945_eeprom *)priv->eeprom;
2194 int delta_index;
2195 u8 rate_index;
2196 u8 scan_tbl_index;
2197 const s8 *clip_pwrs; /* array of power levels for each rate */
2198 u8 gain, dsp_atten;
2199 s8 power;
2200 u8 pwr_index, base_pwr_index, a_band;
2201 u8 i;
2202 int temperature;
2203
2204 /* save temperature reference,
2205 * so we can determine next time to calibrate */
2206 temperature = iwl3945_hw_reg_txpower_get_temperature(priv);
2207 priv->last_temperature = temperature;
2208
2209 iwl3945_hw_reg_init_channel_groups(priv);
2210
2211 /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2212 for (i = 0, ch_info = priv->channel_info; i < priv->channel_count;
2213 i++, ch_info++) {
2214 a_band = is_channel_a_band(ch_info);
2215 if (!is_channel_valid(ch_info))
2216 continue;
2217
2218 /* find this channel's channel group (*not* "band") index */
2219 ch_info->group_index =
2220 iwl3945_hw_reg_get_ch_grp_index(priv, ch_info);
2221
2222 /* Get this chnlgrp's rate->max/clip-powers table */
2223 clip_pwrs = priv->clip39_groups[ch_info->group_index].clip_powers;
2224
2225 /* calculate power index *adjustment* value according to
2226 * diff between current temperature and factory temperature */
2227 delta_index = iwl3945_hw_reg_adjust_power_by_temp(temperature,
2228 eeprom->groups[ch_info->group_index].
2229 temperature);
2230
2231 IWL_DEBUG_POWER(priv, "Delta index for channel %d: %d [%d]\n",
2232 ch_info->channel, delta_index, temperature +
2233 IWL_TEMP_CONVERT);
2234
2235 /* set tx power value for all OFDM rates */
2236 for (rate_index = 0; rate_index < IWL_OFDM_RATES;
2237 rate_index++) {
2238 s32 uninitialized_var(power_idx);
2239 int rc;
2240
2241 /* use channel group's clip-power table,
2242 * but don't exceed channel's max power */
2243 s8 pwr = min(ch_info->max_power_avg,
2244 clip_pwrs[rate_index]);
2245
2246 pwr_info = &ch_info->power_info[rate_index];
2247
2248 /* get base (i.e. at factory-measured temperature)
2249 * power table index for this rate's power */
2250 rc = iwl3945_hw_reg_get_matched_power_index(priv, pwr,
2251 ch_info->group_index,
2252 &power_idx);
2253 if (rc) {
2254 IWL_ERR(priv, "Invalid power index\n");
2255 return rc;
2256 }
2257 pwr_info->base_power_index = (u8) power_idx;
2258
2259 /* temperature compensate */
2260 power_idx += delta_index;
2261
2262 /* stay within range of gain table */
2263 power_idx = iwl3945_hw_reg_fix_power_index(power_idx);
2264
2265 /* fill 1 OFDM rate's iwl3945_channel_power_info struct */
2266 pwr_info->requested_power = pwr;
2267 pwr_info->power_table_index = (u8) power_idx;
2268 pwr_info->tpc.tx_gain =
2269 power_gain_table[a_band][power_idx].tx_gain;
2270 pwr_info->tpc.dsp_atten =
2271 power_gain_table[a_band][power_idx].dsp_atten;
2272 }
2273
2274 /* set tx power for CCK rates, based on OFDM 12 Mbit settings*/
2275 pwr_info = &ch_info->power_info[IWL_RATE_12M_INDEX_TABLE];
2276 power = pwr_info->requested_power +
2277 IWL_CCK_FROM_OFDM_POWER_DIFF;
2278 pwr_index = pwr_info->power_table_index +
2279 IWL_CCK_FROM_OFDM_INDEX_DIFF;
2280 base_pwr_index = pwr_info->base_power_index +
2281 IWL_CCK_FROM_OFDM_INDEX_DIFF;
2282
2283 /* stay within table range */
2284 pwr_index = iwl3945_hw_reg_fix_power_index(pwr_index);
2285 gain = power_gain_table[a_band][pwr_index].tx_gain;
2286 dsp_atten = power_gain_table[a_band][pwr_index].dsp_atten;
2287
2288 /* fill each CCK rate's iwl3945_channel_power_info structure
2289 * NOTE: All CCK-rate Txpwrs are the same for a given chnl!
2290 * NOTE: CCK rates start at end of OFDM rates! */
2291 for (rate_index = 0;
2292 rate_index < IWL_CCK_RATES; rate_index++) {
2293 pwr_info = &ch_info->power_info[rate_index+IWL_OFDM_RATES];
2294 pwr_info->requested_power = power;
2295 pwr_info->power_table_index = pwr_index;
2296 pwr_info->base_power_index = base_pwr_index;
2297 pwr_info->tpc.tx_gain = gain;
2298 pwr_info->tpc.dsp_atten = dsp_atten;
2299 }
2300
2301 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2302 for (scan_tbl_index = 0;
2303 scan_tbl_index < IWL_NUM_SCAN_RATES; scan_tbl_index++) {
2304 s32 actual_index = (scan_tbl_index == 0) ?
2305 IWL_RATE_1M_INDEX_TABLE : IWL_RATE_6M_INDEX_TABLE;
2306 iwl3945_hw_reg_set_scan_power(priv, scan_tbl_index,
2307 actual_index, clip_pwrs, ch_info, a_band);
2308 }
2309 }
2310
2311 return 0;
2312 }
2313
2314 int iwl3945_hw_rxq_stop(struct iwl_priv *priv)
2315 {
2316 int rc;
2317 unsigned long flags;
2318
2319 spin_lock_irqsave(&priv->lock, flags);
2320 rc = iwl_grab_nic_access(priv);
2321 if (rc) {
2322 spin_unlock_irqrestore(&priv->lock, flags);
2323 return rc;
2324 }
2325
2326 iwl_write_direct32(priv, FH39_RCSR_CONFIG(0), 0);
2327 rc = iwl_poll_direct_bit(priv, FH39_RSSR_STATUS,
2328 FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
2329 if (rc < 0)
2330 IWL_ERR(priv, "Can't stop Rx DMA.\n");
2331
2332 iwl_release_nic_access(priv);
2333 spin_unlock_irqrestore(&priv->lock, flags);
2334
2335 return 0;
2336 }
2337
2338 int iwl3945_hw_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq)
2339 {
2340 int rc;
2341 unsigned long flags;
2342 int txq_id = txq->q.id;
2343
2344 struct iwl3945_shared *shared_data = priv->shared_virt;
2345
2346 shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32)txq->q.dma_addr);
2347
2348 spin_lock_irqsave(&priv->lock, flags);
2349 rc = iwl_grab_nic_access(priv);
2350 if (rc) {
2351 spin_unlock_irqrestore(&priv->lock, flags);
2352 return rc;
2353 }
2354 iwl_write_direct32(priv, FH39_CBCC_CTRL(txq_id), 0);
2355 iwl_write_direct32(priv, FH39_CBCC_BASE(txq_id), 0);
2356
2357 iwl_write_direct32(priv, FH39_TCSR_CONFIG(txq_id),
2358 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2359 FH39_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2360 FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2361 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2362 FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2363 iwl_release_nic_access(priv);
2364
2365 /* fake read to flush all prev. writes */
2366 iwl_read32(priv, FH39_TSSR_CBB_BASE);
2367 spin_unlock_irqrestore(&priv->lock, flags);
2368
2369 return 0;
2370 }
2371
2372 /*
2373 * HCMD utils
2374 */
2375 static u16 iwl3945_get_hcmd_size(u8 cmd_id, u16 len)
2376 {
2377 switch (cmd_id) {
2378 case REPLY_RXON:
2379 return sizeof(struct iwl3945_rxon_cmd);
2380 case POWER_TABLE_CMD:
2381 return sizeof(struct iwl3945_powertable_cmd);
2382 default:
2383 return len;
2384 }
2385 }
2386
2387 static u16 iwl3945_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
2388 {
2389 u16 size = (u16)sizeof(struct iwl3945_addsta_cmd);
2390 memcpy(data, cmd, size);
2391 return size;
2392 }
2393
2394 /**
2395 * iwl3945_init_hw_rate_table - Initialize the hardware rate fallback table
2396 */
2397 int iwl3945_init_hw_rate_table(struct iwl_priv *priv)
2398 {
2399 int rc, i, index, prev_index;
2400 struct iwl3945_rate_scaling_cmd rate_cmd = {
2401 .reserved = {0, 0, 0},
2402 };
2403 struct iwl3945_rate_scaling_info *table = rate_cmd.table;
2404
2405 for (i = 0; i < ARRAY_SIZE(iwl3945_rates); i++) {
2406 index = iwl3945_rates[i].table_rs_index;
2407
2408 table[index].rate_n_flags =
2409 iwl3945_hw_set_rate_n_flags(iwl3945_rates[i].plcp, 0);
2410 table[index].try_cnt = priv->retry_rate;
2411 prev_index = iwl3945_get_prev_ieee_rate(i);
2412 table[index].next_rate_index =
2413 iwl3945_rates[prev_index].table_rs_index;
2414 }
2415
2416 switch (priv->band) {
2417 case IEEE80211_BAND_5GHZ:
2418 IWL_DEBUG_RATE(priv, "Select A mode rate scale\n");
2419 /* If one of the following CCK rates is used,
2420 * have it fall back to the 6M OFDM rate */
2421 for (i = IWL_RATE_1M_INDEX_TABLE;
2422 i <= IWL_RATE_11M_INDEX_TABLE; i++)
2423 table[i].next_rate_index =
2424 iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2425
2426 /* Don't fall back to CCK rates */
2427 table[IWL_RATE_12M_INDEX_TABLE].next_rate_index =
2428 IWL_RATE_9M_INDEX_TABLE;
2429
2430 /* Don't drop out of OFDM rates */
2431 table[IWL_RATE_6M_INDEX_TABLE].next_rate_index =
2432 iwl3945_rates[IWL_FIRST_OFDM_RATE].table_rs_index;
2433 break;
2434
2435 case IEEE80211_BAND_2GHZ:
2436 IWL_DEBUG_RATE(priv, "Select B/G mode rate scale\n");
2437 /* If an OFDM rate is used, have it fall back to the
2438 * 1M CCK rates */
2439
2440 if (!(priv->sta_supp_rates & IWL_OFDM_RATES_MASK) &&
2441 iwl_is_associated(priv)) {
2442
2443 index = IWL_FIRST_CCK_RATE;
2444 for (i = IWL_RATE_6M_INDEX_TABLE;
2445 i <= IWL_RATE_54M_INDEX_TABLE; i++)
2446 table[i].next_rate_index =
2447 iwl3945_rates[index].table_rs_index;
2448
2449 index = IWL_RATE_11M_INDEX_TABLE;
2450 /* CCK shouldn't fall back to OFDM... */
2451 table[index].next_rate_index = IWL_RATE_5M_INDEX_TABLE;
2452 }
2453 break;
2454
2455 default:
2456 WARN_ON(1);
2457 break;
2458 }
2459
2460 /* Update the rate scaling for control frame Tx */
2461 rate_cmd.table_id = 0;
2462 rc = iwl_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2463 &rate_cmd);
2464 if (rc)
2465 return rc;
2466
2467 /* Update the rate scaling for data frame Tx */
2468 rate_cmd.table_id = 1;
2469 return iwl_send_cmd_pdu(priv, REPLY_RATE_SCALE, sizeof(rate_cmd),
2470 &rate_cmd);
2471 }
2472
2473 /* Called when initializing driver */
2474 int iwl3945_hw_set_hw_params(struct iwl_priv *priv)
2475 {
2476 memset((void *)&priv->hw_params, 0,
2477 sizeof(struct iwl_hw_params));
2478
2479 priv->shared_virt =
2480 pci_alloc_consistent(priv->pci_dev,
2481 sizeof(struct iwl3945_shared),
2482 &priv->shared_phys);
2483
2484 if (!priv->shared_virt) {
2485 IWL_ERR(priv, "failed to allocate pci memory\n");
2486 mutex_unlock(&priv->mutex);
2487 return -ENOMEM;
2488 }
2489
2490 /* Assign number of Usable TX queues */
2491 priv->hw_params.max_txq_num = TFD_QUEUE_MAX;
2492
2493 priv->hw_params.tfd_size = sizeof(struct iwl3945_tfd);
2494 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_3K;
2495 priv->hw_params.max_pkt_size = 2342;
2496 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2497 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2498 priv->hw_params.max_stations = IWL3945_STATION_COUNT;
2499 priv->hw_params.bcast_sta_id = IWL3945_BROADCAST_ID;
2500
2501 priv->hw_params.rx_wrt_ptr_reg = FH39_RSCSR_CHNL0_WPTR;
2502
2503 return 0;
2504 }
2505
2506 unsigned int iwl3945_hw_get_beacon_cmd(struct iwl_priv *priv,
2507 struct iwl3945_frame *frame, u8 rate)
2508 {
2509 struct iwl3945_tx_beacon_cmd *tx_beacon_cmd;
2510 unsigned int frame_size;
2511
2512 tx_beacon_cmd = (struct iwl3945_tx_beacon_cmd *)&frame->u;
2513 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2514
2515 tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
2516 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2517
2518 frame_size = iwl3945_fill_beacon_frame(priv,
2519 tx_beacon_cmd->frame,
2520 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2521
2522 BUG_ON(frame_size > MAX_MPDU_SIZE);
2523 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2524
2525 tx_beacon_cmd->tx.rate = rate;
2526 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2527 TX_CMD_FLG_TSF_MSK);
2528
2529 /* supp_rates[0] == OFDM start at IWL_FIRST_OFDM_RATE*/
2530 tx_beacon_cmd->tx.supp_rates[0] =
2531 (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2532
2533 tx_beacon_cmd->tx.supp_rates[1] =
2534 (IWL_CCK_BASIC_RATES_MASK & 0xF);
2535
2536 return sizeof(struct iwl3945_tx_beacon_cmd) + frame_size;
2537 }
2538
2539 void iwl3945_hw_rx_handler_setup(struct iwl_priv *priv)
2540 {
2541 priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
2542 priv->rx_handlers[REPLY_3945_RX] = iwl3945_rx_reply_rx;
2543 }
2544
2545 void iwl3945_hw_setup_deferred_work(struct iwl_priv *priv)
2546 {
2547 INIT_DELAYED_WORK(&priv->thermal_periodic,
2548 iwl3945_bg_reg_txpower_periodic);
2549 }
2550
2551 void iwl3945_hw_cancel_deferred_work(struct iwl_priv *priv)
2552 {
2553 cancel_delayed_work(&priv->thermal_periodic);
2554 }
2555
2556 /* check contents of special bootstrap uCode SRAM */
2557 static int iwl3945_verify_bsm(struct iwl_priv *priv)
2558 {
2559 __le32 *image = priv->ucode_boot.v_addr;
2560 u32 len = priv->ucode_boot.len;
2561 u32 reg;
2562 u32 val;
2563
2564 IWL_DEBUG_INFO(priv, "Begin verify bsm\n");
2565
2566 /* verify BSM SRAM contents */
2567 val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
2568 for (reg = BSM_SRAM_LOWER_BOUND;
2569 reg < BSM_SRAM_LOWER_BOUND + len;
2570 reg += sizeof(u32), image++) {
2571 val = iwl_read_prph(priv, reg);
2572 if (val != le32_to_cpu(*image)) {
2573 IWL_ERR(priv, "BSM uCode verification failed at "
2574 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
2575 BSM_SRAM_LOWER_BOUND,
2576 reg - BSM_SRAM_LOWER_BOUND, len,
2577 val, le32_to_cpu(*image));
2578 return -EIO;
2579 }
2580 }
2581
2582 IWL_DEBUG_INFO(priv, "BSM bootstrap uCode image OK\n");
2583
2584 return 0;
2585 }
2586
2587
2588 /******************************************************************************
2589 *
2590 * EEPROM related functions
2591 *
2592 ******************************************************************************/
2593
2594 /*
2595 * Clear the OWNER_MSK, to establish driver (instead of uCode running on
2596 * embedded controller) as EEPROM reader; each read is a series of pulses
2597 * to/from the EEPROM chip, not a single event, so even reads could conflict
2598 * if they weren't arbitrated by some ownership mechanism. Here, the driver
2599 * simply claims ownership, which should be safe when this function is called
2600 * (i.e. before loading uCode!).
2601 */
2602 static int iwl3945_eeprom_acquire_semaphore(struct iwl_priv *priv)
2603 {
2604 _iwl_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
2605 return 0;
2606 }
2607
2608
2609 static void iwl3945_eeprom_release_semaphore(struct iwl_priv *priv)
2610 {
2611 return;
2612 }
2613
2614 /**
2615 * iwl3945_load_bsm - Load bootstrap instructions
2616 *
2617 * BSM operation:
2618 *
2619 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
2620 * in special SRAM that does not power down during RFKILL. When powering back
2621 * up after power-saving sleeps (or during initial uCode load), the BSM loads
2622 * the bootstrap program into the on-board processor, and starts it.
2623 *
2624 * The bootstrap program loads (via DMA) instructions and data for a new
2625 * program from host DRAM locations indicated by the host driver in the
2626 * BSM_DRAM_* registers. Once the new program is loaded, it starts
2627 * automatically.
2628 *
2629 * When initializing the NIC, the host driver points the BSM to the
2630 * "initialize" uCode image. This uCode sets up some internal data, then
2631 * notifies host via "initialize alive" that it is complete.
2632 *
2633 * The host then replaces the BSM_DRAM_* pointer values to point to the
2634 * normal runtime uCode instructions and a backup uCode data cache buffer
2635 * (filled initially with starting data values for the on-board processor),
2636 * then triggers the "initialize" uCode to load and launch the runtime uCode,
2637 * which begins normal operation.
2638 *
2639 * When doing a power-save shutdown, runtime uCode saves data SRAM into
2640 * the backup data cache in DRAM before SRAM is powered down.
2641 *
2642 * When powering back up, the BSM loads the bootstrap program. This reloads
2643 * the runtime uCode instructions and the backup data cache into SRAM,
2644 * and re-launches the runtime uCode from where it left off.
2645 */
2646 static int iwl3945_load_bsm(struct iwl_priv *priv)
2647 {
2648 __le32 *image = priv->ucode_boot.v_addr;
2649 u32 len = priv->ucode_boot.len;
2650 dma_addr_t pinst;
2651 dma_addr_t pdata;
2652 u32 inst_len;
2653 u32 data_len;
2654 int rc;
2655 int i;
2656 u32 done;
2657 u32 reg_offset;
2658
2659 IWL_DEBUG_INFO(priv, "Begin load bsm\n");
2660
2661 /* make sure bootstrap program is no larger than BSM's SRAM size */
2662 if (len > IWL39_MAX_BSM_SIZE)
2663 return -EINVAL;
2664
2665 /* Tell bootstrap uCode where to find the "Initialize" uCode
2666 * in host DRAM ... host DRAM physical address bits 31:0 for 3945.
2667 * NOTE: iwl3945_initialize_alive_start() will replace these values,
2668 * after the "initialize" uCode has run, to point to
2669 * runtime/protocol instructions and backup data cache. */
2670 pinst = priv->ucode_init.p_addr;
2671 pdata = priv->ucode_init_data.p_addr;
2672 inst_len = priv->ucode_init.len;
2673 data_len = priv->ucode_init_data.len;
2674
2675 rc = iwl_grab_nic_access(priv);
2676 if (rc)
2677 return rc;
2678
2679 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
2680 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
2681 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
2682 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
2683
2684 /* Fill BSM memory with bootstrap instructions */
2685 for (reg_offset = BSM_SRAM_LOWER_BOUND;
2686 reg_offset < BSM_SRAM_LOWER_BOUND + len;
2687 reg_offset += sizeof(u32), image++)
2688 _iwl_write_prph(priv, reg_offset,
2689 le32_to_cpu(*image));
2690
2691 rc = iwl3945_verify_bsm(priv);
2692 if (rc) {
2693 iwl_release_nic_access(priv);
2694 return rc;
2695 }
2696
2697 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
2698 iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
2699 iwl_write_prph(priv, BSM_WR_MEM_DST_REG,
2700 IWL39_RTC_INST_LOWER_BOUND);
2701 iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
2702
2703 /* Load bootstrap code into instruction SRAM now,
2704 * to prepare to load "initialize" uCode */
2705 iwl_write_prph(priv, BSM_WR_CTRL_REG,
2706 BSM_WR_CTRL_REG_BIT_START);
2707
2708 /* Wait for load of bootstrap uCode to finish */
2709 for (i = 0; i < 100; i++) {
2710 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
2711 if (!(done & BSM_WR_CTRL_REG_BIT_START))
2712 break;
2713 udelay(10);
2714 }
2715 if (i < 100)
2716 IWL_DEBUG_INFO(priv, "BSM write complete, poll %d iterations\n", i);
2717 else {
2718 IWL_ERR(priv, "BSM write did not complete!\n");
2719 return -EIO;
2720 }
2721
2722 /* Enable future boot loads whenever power management unit triggers it
2723 * (e.g. when powering back up after power-save shutdown) */
2724 iwl_write_prph(priv, BSM_WR_CTRL_REG,
2725 BSM_WR_CTRL_REG_BIT_START_EN);
2726
2727 iwl_release_nic_access(priv);
2728
2729 return 0;
2730 }
2731
2732 static struct iwl_lib_ops iwl3945_lib = {
2733 .txq_attach_buf_to_tfd = iwl3945_hw_txq_attach_buf_to_tfd,
2734 .txq_free_tfd = iwl3945_hw_txq_free_tfd,
2735 .txq_init = iwl3945_hw_tx_queue_init,
2736 .load_ucode = iwl3945_load_bsm,
2737 .apm_ops = {
2738 .init = iwl3945_apm_init,
2739 .reset = iwl3945_apm_reset,
2740 .stop = iwl3945_apm_stop,
2741 .config = iwl3945_nic_config,
2742 .set_pwr_src = iwl3945_set_pwr_src,
2743 },
2744 .eeprom_ops = {
2745 .regulatory_bands = {
2746 EEPROM_REGULATORY_BAND_1_CHANNELS,
2747 EEPROM_REGULATORY_BAND_2_CHANNELS,
2748 EEPROM_REGULATORY_BAND_3_CHANNELS,
2749 EEPROM_REGULATORY_BAND_4_CHANNELS,
2750 EEPROM_REGULATORY_BAND_5_CHANNELS,
2751 EEPROM_REGULATORY_BAND_NO_FAT,
2752 EEPROM_REGULATORY_BAND_NO_FAT,
2753 },
2754 .verify_signature = iwlcore_eeprom_verify_signature,
2755 .acquire_semaphore = iwl3945_eeprom_acquire_semaphore,
2756 .release_semaphore = iwl3945_eeprom_release_semaphore,
2757 .query_addr = iwlcore_eeprom_query_addr,
2758 },
2759 .send_tx_power = iwl3945_send_tx_power,
2760 .is_valid_rtc_data_addr = iwl3945_hw_valid_rtc_data_addr,
2761 };
2762
2763 static struct iwl_hcmd_utils_ops iwl3945_hcmd_utils = {
2764 .get_hcmd_size = iwl3945_get_hcmd_size,
2765 .build_addsta_hcmd = iwl3945_build_addsta_hcmd,
2766 };
2767
2768 static struct iwl_ops iwl3945_ops = {
2769 .lib = &iwl3945_lib,
2770 .utils = &iwl3945_hcmd_utils,
2771 };
2772
2773 static struct iwl_cfg iwl3945_bg_cfg = {
2774 .name = "3945BG",
2775 .fw_name_pre = IWL3945_FW_PRE,
2776 .ucode_api_max = IWL3945_UCODE_API_MAX,
2777 .ucode_api_min = IWL3945_UCODE_API_MIN,
2778 .sku = IWL_SKU_G,
2779 .eeprom_size = IWL3945_EEPROM_IMG_SIZE,
2780 .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
2781 .ops = &iwl3945_ops,
2782 .mod_params = &iwl3945_mod_params
2783 };
2784
2785 static struct iwl_cfg iwl3945_abg_cfg = {
2786 .name = "3945ABG",
2787 .fw_name_pre = IWL3945_FW_PRE,
2788 .ucode_api_max = IWL3945_UCODE_API_MAX,
2789 .ucode_api_min = IWL3945_UCODE_API_MIN,
2790 .sku = IWL_SKU_A|IWL_SKU_G,
2791 .eeprom_size = IWL3945_EEPROM_IMG_SIZE,
2792 .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
2793 .ops = &iwl3945_ops,
2794 .mod_params = &iwl3945_mod_params
2795 };
2796
2797 struct pci_device_id iwl3945_hw_card_ids[] = {
2798 {IWL_PCI_DEVICE(0x4222, 0x1005, iwl3945_bg_cfg)},
2799 {IWL_PCI_DEVICE(0x4222, 0x1034, iwl3945_bg_cfg)},
2800 {IWL_PCI_DEVICE(0x4222, 0x1044, iwl3945_bg_cfg)},
2801 {IWL_PCI_DEVICE(0x4227, 0x1014, iwl3945_bg_cfg)},
2802 {IWL_PCI_DEVICE(0x4222, PCI_ANY_ID, iwl3945_abg_cfg)},
2803 {IWL_PCI_DEVICE(0x4227, PCI_ANY_ID, iwl3945_abg_cfg)},
2804 {0}
2805 };
2806
2807 MODULE_DEVICE_TABLE(pci, iwl3945_hw_card_ids);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree