kernel/drivers/net/wireless/iwlegacy/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/slab.h>
  30 #include <linux/pci.h>
  31 #include <linux/dma-mapping.h>
  32 #include <linux/delay.h>
  33 #include <linux/sched.h>
  34 #include <linux/skbuff.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/firmware.h>
  37 #include <linux/etherdevice.h>
  38 #include <asm/unaligned.h>
  39 #include <net/mac80211.h>
  40
  41 #include "common.h"
  42 #include "3945.h"
  43
  44 /* Send led command */
  45 static int
  46 il3945_send_led_cmd(struct il_priv *il, struct il_led_cmd *led_cmd)
  47 {
  48         struct il_host_cmd cmd = {
  49                 .id = C_LEDS,
  50                 .len = sizeof(struct il_led_cmd),
  51                 .data = led_cmd,
  52                 .flags = CMD_ASYNC,
  53                 .callback = NULL,
  54         };
  55
  56         return il_send_cmd(il, &cmd);
  57 }
  58
  59 #define IL_DECLARE_RATE_INFO(r, ip, in, rp, rn, pp, np)    \
  60         [RATE_##r##M_IDX] = { RATE_##r##M_PLCP,   \
  61                                     RATE_##r##M_IEEE,   \
  62                                     RATE_##ip##M_IDX, \
  63                                     RATE_##in##M_IDX, \
  64                                     RATE_##rp##M_IDX, \
  65                                     RATE_##rn##M_IDX, \
  66                                     RATE_##pp##M_IDX, \
  67                                     RATE_##np##M_IDX, \
  68                                     RATE_##r##M_IDX_TBL, \
  69                                     RATE_##ip##M_IDX_TBL }
  70
  71 /*
  72  * Parameter order:
  73  *   rate, prev rate, next rate, prev tgg rate, next tgg rate
  74  *
  75  * If there isn't a valid next or previous rate then INV is used which
  76  * maps to RATE_INVALID
  77  *
  78  */
  79 const struct il3945_rate_info il3945_rates[RATE_COUNT_3945] = {
  80         IL_DECLARE_RATE_INFO(1, INV, 2, INV, 2, INV, 2),        /*  1mbps */
  81         IL_DECLARE_RATE_INFO(2, 1, 5, 1, 5, 1, 5),      /*  2mbps */
  82         IL_DECLARE_RATE_INFO(5, 2, 6, 2, 11, 2, 11),    /*5.5mbps */
  83         IL_DECLARE_RATE_INFO(11, 9, 12, 5, 12, 5, 18),  /* 11mbps */
  84         IL_DECLARE_RATE_INFO(6, 5, 9, 5, 11, 5, 11),    /*  6mbps */
  85         IL_DECLARE_RATE_INFO(9, 6, 11, 5, 11, 5, 11),   /*  9mbps */
  86         IL_DECLARE_RATE_INFO(12, 11, 18, 11, 18, 11, 18),       /* 12mbps */
  87         IL_DECLARE_RATE_INFO(18, 12, 24, 12, 24, 11, 24),       /* 18mbps */
  88         IL_DECLARE_RATE_INFO(24, 18, 36, 18, 36, 18, 36),       /* 24mbps */
  89         IL_DECLARE_RATE_INFO(36, 24, 48, 24, 48, 24, 48),       /* 36mbps */
  90         IL_DECLARE_RATE_INFO(48, 36, 54, 36, 54, 36, 54),       /* 48mbps */
  91         IL_DECLARE_RATE_INFO(54, 48, INV, 48, INV, 48, INV),    /* 54mbps */
  92 };
  93
  94 static inline u8
  95 il3945_get_prev_ieee_rate(u8 rate_idx)
  96 {
  97         u8 rate = il3945_rates[rate_idx].prev_ieee;
  98
  99         if (rate == RATE_INVALID)
 100                 rate = rate_idx;
 101         return rate;
 102 }
 103
 104 /* 1 = enable the il3945_disable_events() function */
 105 #define IL_EVT_DISABLE (0)
 106 #define IL_EVT_DISABLE_SIZE (1532/32)
 107
 108 /**
 109  * il3945_disable_events - Disable selected events in uCode event log
 110  *
 111  * Disable an event by writing "1"s into "disable"
 112  *   bitmap in SRAM.  Bit position corresponds to Event # (id/type).
 113  *   Default values of 0 enable uCode events to be logged.
 114  * Use for only special debugging.  This function is just a placeholder as-is,
 115  *   you'll need to provide the special bits! ...
 116  *   ... and set IL_EVT_DISABLE to 1. */
 117 void
 118 il3945_disable_events(struct il_priv *il)
 119 {
 120         int i;
 121         u32 base;               /* SRAM address of event log header */
 122         u32 disable_ptr;        /* SRAM address of event-disable bitmap array */
 123         u32 array_size;         /* # of u32 entries in array */
 124         static const u32 evt_disable[IL_EVT_DISABLE_SIZE] = {
 125                 0x00000000,     /*   31 -    0  Event id numbers */
 126                 0x00000000,     /*   63 -   32 */
 127                 0x00000000,     /*   95 -   64 */
 128                 0x00000000,     /*  127 -   96 */
 129                 0x00000000,     /*  159 -  128 */
 130                 0x00000000,     /*  191 -  160 */
 131                 0x00000000,     /*  223 -  192 */
 132                 0x00000000,     /*  255 -  224 */
 133                 0x00000000,     /*  287 -  256 */
 134                 0x00000000,     /*  319 -  288 */
 135                 0x00000000,     /*  351 -  320 */
 136                 0x00000000,     /*  383 -  352 */
 137                 0x00000000,     /*  415 -  384 */
 138                 0x00000000,     /*  447 -  416 */
 139                 0x00000000,     /*  479 -  448 */
 140                 0x00000000,     /*  511 -  480 */
 141                 0x00000000,     /*  543 -  512 */
 142                 0x00000000,     /*  575 -  544 */
 143                 0x00000000,     /*  607 -  576 */
 144                 0x00000000,     /*  639 -  608 */
 145                 0x00000000,     /*  671 -  640 */
 146                 0x00000000,     /*  703 -  672 */
 147                 0x00000000,     /*  735 -  704 */
 148                 0x00000000,     /*  767 -  736 */
 149                 0x00000000,     /*  799 -  768 */
 150                 0x00000000,     /*  831 -  800 */
 151                 0x00000000,     /*  863 -  832 */
 152                 0x00000000,     /*  895 -  864 */
 153                 0x00000000,     /*  927 -  896 */
 154                 0x00000000,     /*  959 -  928 */
 155                 0x00000000,     /*  991 -  960 */
 156                 0x00000000,     /* 1023 -  992 */
 157                 0x00000000,     /* 1055 - 1024 */
 158                 0x00000000,     /* 1087 - 1056 */
 159                 0x00000000,     /* 1119 - 1088 */
 160                 0x00000000,     /* 1151 - 1120 */
 161                 0x00000000,     /* 1183 - 1152 */
 162                 0x00000000,     /* 1215 - 1184 */
 163                 0x00000000,     /* 1247 - 1216 */
 164                 0x00000000,     /* 1279 - 1248 */
 165                 0x00000000,     /* 1311 - 1280 */
 166                 0x00000000,     /* 1343 - 1312 */
 167                 0x00000000,     /* 1375 - 1344 */
 168                 0x00000000,     /* 1407 - 1376 */
 169                 0x00000000,     /* 1439 - 1408 */
 170                 0x00000000,     /* 1471 - 1440 */
 171                 0x00000000,     /* 1503 - 1472 */
 172         };
 173
 174         base = le32_to_cpu(il->card_alive.log_event_table_ptr);
 175         if (!il3945_hw_valid_rtc_data_addr(base)) {
 176                 IL_ERR("Invalid event log pointer 0x%08X\n", base);
 177                 return;
 178         }
 179
 180         disable_ptr = il_read_targ_mem(il, base + (4 * sizeof(u32)));
 181         array_size = il_read_targ_mem(il, base + (5 * sizeof(u32)));
 182
 183         if (IL_EVT_DISABLE && array_size == IL_EVT_DISABLE_SIZE) {
 184                 D_INFO("Disabling selected uCode log events at 0x%x\n",
 185                        disable_ptr);
 186                 for (i = 0; i < IL_EVT_DISABLE_SIZE; i++)
 187                         il_write_targ_mem(il, disable_ptr + (i * sizeof(u32)),
 188                                           evt_disable[i]);
 189
 190         } else {
 191                 D_INFO("Selected uCode log events may be disabled\n");
 192                 D_INFO("  by writing \"1\"s into disable bitmap\n");
 193                 D_INFO("  in SRAM at 0x%x, size %d u32s\n", disable_ptr,
 194                        array_size);
 195         }
 196
 197 }
 198
 199 static int
 200 il3945_hwrate_to_plcp_idx(u8 plcp)
 201 {
 202         int idx;
 203
 204         for (idx = 0; idx < RATE_COUNT_3945; idx++)
 205                 if (il3945_rates[idx].plcp == plcp)
 206                         return idx;
 207         return -1;
 208 }
 209
 210 #ifdef CONFIG_IWLEGACY_DEBUG
 211 #define TX_STATUS_ENTRY(x) case TX_3945_STATUS_FAIL_ ## x: return #x
 212
 213 static const char *
 214 il3945_get_tx_fail_reason(u32 status)
 215 {
 216         switch (status & TX_STATUS_MSK) {
 217         case TX_3945_STATUS_SUCCESS:
 218                 return "SUCCESS";
 219                 TX_STATUS_ENTRY(SHORT_LIMIT);
 220                 TX_STATUS_ENTRY(LONG_LIMIT);
 221                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
 222                 TX_STATUS_ENTRY(MGMNT_ABORT);
 223                 TX_STATUS_ENTRY(NEXT_FRAG);
 224                 TX_STATUS_ENTRY(LIFE_EXPIRE);
 225                 TX_STATUS_ENTRY(DEST_PS);
 226                 TX_STATUS_ENTRY(ABORTED);
 227                 TX_STATUS_ENTRY(BT_RETRY);
 228                 TX_STATUS_ENTRY(STA_INVALID);
 229                 TX_STATUS_ENTRY(FRAG_DROPPED);
 230                 TX_STATUS_ENTRY(TID_DISABLE);
 231                 TX_STATUS_ENTRY(FRAME_FLUSHED);
 232                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
 233                 TX_STATUS_ENTRY(TX_LOCKED);
 234                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
 235         }
 236
 237         return "UNKNOWN";
 238 }
 239 #else
 240 static inline const char *
 241 il3945_get_tx_fail_reason(u32 status)
 242 {
 243         return "";
 244 }
 245 #endif
 246
 247 /*
 248  * get ieee prev rate from rate scale table.
 249  * for A and B mode we need to overright prev
 250  * value
 251  */
 252 int
 253 il3945_rs_next_rate(struct il_priv *il, int rate)
 254 {
 255         int next_rate = il3945_get_prev_ieee_rate(rate);
 256
 257         switch (il->band) {
 258         case IEEE80211_BAND_5GHZ:
 259                 if (rate == RATE_12M_IDX)
 260                         next_rate = RATE_9M_IDX;
 261                 else if (rate == RATE_6M_IDX)
 262                         next_rate = RATE_6M_IDX;
 263                 break;
 264         case IEEE80211_BAND_2GHZ:
 265                 if (!(il->_3945.sta_supp_rates & IL_OFDM_RATES_MASK) &&
 266                     il_is_associated(il)) {
 267                         if (rate == RATE_11M_IDX)
 268                                 next_rate = RATE_5M_IDX;
 269                 }
 270                 break;
 271
 272         default:
 273                 break;
 274         }
 275
 276         return next_rate;
 277 }
 278
 279 /**
 280  * il3945_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
 281  *
 282  * When FW advances 'R' idx, all entries between old and new 'R' idx
 283  * need to be reclaimed. As result, some free space forms. If there is
 284  * enough free space (> low mark), wake the stack that feeds us.
 285  */
 286 static void
 287 il3945_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
 288 {
 289         struct il_tx_queue *txq = &il->txq[txq_id];
 290         struct il_queue *q = &txq->q;
 291         struct sk_buff *skb;
 292
 293         BUG_ON(txq_id == IL39_CMD_QUEUE_NUM);
 294
 295         for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
 296              q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
 297
 298                 skb = txq->skbs[txq->q.read_ptr];
 299                 ieee80211_tx_status_irqsafe(il->hw, skb);
 300                 txq->skbs[txq->q.read_ptr] = NULL;
 301                 il->ops->txq_free_tfd(il, txq);
 302         }
 303
 304         if (il_queue_space(q) > q->low_mark && txq_id >= 0 &&
 305             txq_id != IL39_CMD_QUEUE_NUM && il->mac80211_registered)
 306                 il_wake_queue(il, txq);
 307 }
 308
 309 /**
 310  * il3945_hdl_tx - Handle Tx response
 311  */
 312 static void
 313 il3945_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
 314 {
 315         struct il_rx_pkt *pkt = rxb_addr(rxb);
 316         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
 317         int txq_id = SEQ_TO_QUEUE(sequence);
 318         int idx = SEQ_TO_IDX(sequence);
 319         struct il_tx_queue *txq = &il->txq[txq_id];
 320         struct ieee80211_tx_info *info;
 321         struct il3945_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
 322         u32 status = le32_to_cpu(tx_resp->status);
 323         int rate_idx;
 324         int fail;
 325
 326         if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
 327                 IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
 328                        "is out of range [0-%d] %d %d\n", txq_id, idx,
 329                        txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
 330                 return;
 331         }
 332
 333         /*
 334          * Firmware will not transmit frame on passive channel, if it not yet
 335          * received some valid frame on that channel. When this error happen
 336          * we have to wait until firmware will unblock itself i.e. when we
 337          * note received beacon or other frame. We unblock queues in
 338          * il3945_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
 339          */
 340         if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
 341             il->iw_mode == NL80211_IFTYPE_STATION) {
 342                 il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
 343                 D_INFO("Stopped queues - RX waiting on passive channel\n");
 344         }
 345
 346         txq->time_stamp = jiffies;
 347         info = IEEE80211_SKB_CB(txq->skbs[txq->q.read_ptr]);
 348         ieee80211_tx_info_clear_status(info);
 349
 350         /* Fill the MRR chain with some info about on-chip retransmissions */
 351         rate_idx = il3945_hwrate_to_plcp_idx(tx_resp->rate);
 352         if (info->band == IEEE80211_BAND_5GHZ)
 353                 rate_idx -= IL_FIRST_OFDM_RATE;
 354
 355         fail = tx_resp->failure_frame;
 356
 357         info->status.rates[0].idx = rate_idx;
 358         info->status.rates[0].count = fail + 1; /* add final attempt */
 359
 360         /* tx_status->rts_retry_count = tx_resp->failure_rts; */
 361         info->flags |=
 362             ((status & TX_STATUS_MSK) ==
 363              TX_STATUS_SUCCESS) ? IEEE80211_TX_STAT_ACK : 0;
 364
 365         D_TX("Tx queue %d Status %s (0x%08x) plcp rate %d retries %d\n", txq_id,
 366              il3945_get_tx_fail_reason(status), status, tx_resp->rate,
 367              tx_resp->failure_frame);
 368
 369         D_TX_REPLY("Tx queue reclaim %d\n", idx);
 370         il3945_tx_queue_reclaim(il, txq_id, idx);
 371
 372         if (status & TX_ABORT_REQUIRED_MSK)
 373                 IL_ERR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
 374 }
 375
 376 /*****************************************************************************
 377  *
 378  * Intel PRO/Wireless 3945ABG/BG Network Connection
 379  *
 380  *  RX handler implementations
 381  *
 382  *****************************************************************************/
 383 #ifdef CONFIG_IWLEGACY_DEBUGFS
 384 static void
 385 il3945_accumulative_stats(struct il_priv *il, __le32 * stats)
 386 {
 387         int i;
 388         __le32 *prev_stats;
 389         u32 *accum_stats;
 390         u32 *delta, *max_delta;
 391
 392         prev_stats = (__le32 *) &il->_3945.stats;
 393         accum_stats = (u32 *) &il->_3945.accum_stats;
 394         delta = (u32 *) &il->_3945.delta_stats;
 395         max_delta = (u32 *) &il->_3945.max_delta;
 396
 397         for (i = sizeof(__le32); i < sizeof(struct il3945_notif_stats);
 398              i +=
 399              sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
 400              accum_stats++) {
 401                 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
 402                         *delta =
 403                             (le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
 404                         *accum_stats += *delta;
 405                         if (*delta > *max_delta)
 406                                 *max_delta = *delta;
 407                 }
 408         }
 409
 410         /* reset accumulative stats for "no-counter" type stats */
 411         il->_3945.accum_stats.general.temperature =
 412             il->_3945.stats.general.temperature;
 413         il->_3945.accum_stats.general.ttl_timestamp =
 414             il->_3945.stats.general.ttl_timestamp;
 415 }
 416 #endif
 417
 418 void
 419 il3945_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
 420 {
 421         struct il_rx_pkt *pkt = rxb_addr(rxb);
 422
 423         D_RX("Statistics notification received (%d vs %d).\n",
 424              (int)sizeof(struct il3945_notif_stats),
 425              le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
 426 #ifdef CONFIG_IWLEGACY_DEBUGFS
 427         il3945_accumulative_stats(il, (__le32 *) &pkt->u.raw);
 428 #endif
 429
 430         memcpy(&il->_3945.stats, pkt->u.raw, sizeof(il->_3945.stats));
 431 }
 432
 433 void
 434 il3945_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
 435 {
 436         struct il_rx_pkt *pkt = rxb_addr(rxb);
 437         __le32 *flag = (__le32 *) &pkt->u.raw;
 438
 439         if (le32_to_cpu(*flag) & UCODE_STATS_CLEAR_MSK) {
 440 #ifdef CONFIG_IWLEGACY_DEBUGFS
 441                 memset(&il->_3945.accum_stats, 0,
 442                        sizeof(struct il3945_notif_stats));
 443                 memset(&il->_3945.delta_stats, 0,
 444                        sizeof(struct il3945_notif_stats));
 445                 memset(&il->_3945.max_delta, 0,
 446                        sizeof(struct il3945_notif_stats));
 447 #endif
 448                 D_RX("Statistics have been cleared\n");
 449         }
 450         il3945_hdl_stats(il, rxb);
 451 }
 452
 453 /******************************************************************************
 454  *
 455  * Misc. internal state and helper functions
 456  *
 457  ******************************************************************************/
 458
 459 /* This is necessary only for a number of stats, see the caller. */
 460 static int
 461 il3945_is_network_packet(struct il_priv *il, struct ieee80211_hdr *header)
 462 {
 463         /* Filter incoming packets to determine if they are targeted toward
 464          * this network, discarding packets coming from ourselves */
 465         switch (il->iw_mode) {
 466         case NL80211_IFTYPE_ADHOC:      /* Header: Dest. | Source    | BSSID */
 467                 /* packets to our IBSS update information */
 468                 return ether_addr_equal_64bits(header->addr3, il->bssid);
 469         case NL80211_IFTYPE_STATION:    /* Header: Dest. | AP{BSSID} | Source */
 470                 /* packets to our IBSS update information */
 471                 return ether_addr_equal_64bits(header->addr2, il->bssid);
 472         default:
 473                 return 1;
 474         }
 475 }
 476
 477 #define SMALL_PACKET_SIZE 256
 478
 479 static void
 480 il3945_pass_packet_to_mac80211(struct il_priv *il, struct il_rx_buf *rxb,
 481                                struct ieee80211_rx_status *stats)
 482 {
 483         struct il_rx_pkt *pkt = rxb_addr(rxb);
 484         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)IL_RX_DATA(pkt);
 485         struct il3945_rx_frame_hdr *rx_hdr = IL_RX_HDR(pkt);
 486         struct il3945_rx_frame_end *rx_end = IL_RX_END(pkt);
 487         u32 len = le16_to_cpu(rx_hdr->len);
 488         struct sk_buff *skb;
 489         __le16 fc = hdr->frame_control;
 490         u32 fraglen = PAGE_SIZE << il->hw_params.rx_page_order;
 491
 492         /* We received data from the HW, so stop the watchdog */
 493         if (unlikely(len + IL39_RX_FRAME_SIZE > fraglen)) {
 494                 D_DROP("Corruption detected!\n");
 495                 return;
 496         }
 497
 498         /* We only process data packets if the interface is open */
 499         if (unlikely(!il->is_open)) {
 500                 D_DROP("Dropping packet while interface is not open.\n");
 501                 return;
 502         }
 503
 504         if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
 505                 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
 506                 D_INFO("Woke queues - frame received on passive channel\n");
 507         }
 508
 509         skb = dev_alloc_skb(SMALL_PACKET_SIZE);
 510         if (!skb) {
 511                 IL_ERR("dev_alloc_skb failed\n");
 512                 return;
 513         }
 514
 515         if (!il3945_mod_params.sw_crypto)
 516                 il_set_decrypted_flag(il, (struct ieee80211_hdr *)pkt,
 517                                       le32_to_cpu(rx_end->status), stats);
 518
 519         /* If frame is small enough to fit into skb->head, copy it
 520          * and do not consume a full page
 521          */
 522         if (len <= SMALL_PACKET_SIZE) {
 523                 memcpy(skb_put(skb, len), rx_hdr->payload, len);
 524         } else {
 525                 skb_add_rx_frag(skb, 0, rxb->page,
 526                                 (void *)rx_hdr->payload - (void *)pkt, len,
 527                                 fraglen);
 528                 il->alloc_rxb_page--;
 529                 rxb->page = NULL;
 530         }
 531         il_update_stats(il, false, fc, len);
 532         memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
 533
 534         ieee80211_rx(il->hw, skb);
 535 }
 536
 537 #define IL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
 538
 539 static void
 540 il3945_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
 541 {
 542         struct ieee80211_hdr *header;
 543         struct ieee80211_rx_status rx_status = {};
 544         struct il_rx_pkt *pkt = rxb_addr(rxb);
 545         struct il3945_rx_frame_stats *rx_stats = IL_RX_STATS(pkt);
 546         struct il3945_rx_frame_hdr *rx_hdr = IL_RX_HDR(pkt);
 547         struct il3945_rx_frame_end *rx_end = IL_RX_END(pkt);
 548         u16 rx_stats_sig_avg __maybe_unused = le16_to_cpu(rx_stats->sig_avg);
 549         u16 rx_stats_noise_diff __maybe_unused =
 550             le16_to_cpu(rx_stats->noise_diff);
 551         u8 network_packet;
 552
 553         rx_status.flag = 0;
 554         rx_status.mactime = le64_to_cpu(rx_end->timestamp);
 555         rx_status.band =
 556             (rx_hdr->
 557              phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? IEEE80211_BAND_2GHZ :
 558             IEEE80211_BAND_5GHZ;
 559         rx_status.freq =
 560             ieee80211_channel_to_frequency(le16_to_cpu(rx_hdr->channel),
 561                                            rx_status.band);
 562
 563         rx_status.rate_idx = il3945_hwrate_to_plcp_idx(rx_hdr->rate);
 564         if (rx_status.band == IEEE80211_BAND_5GHZ)
 565                 rx_status.rate_idx -= IL_FIRST_OFDM_RATE;
 566
 567         rx_status.antenna =
 568             (le16_to_cpu(rx_hdr->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
 569             4;
 570
 571         /* set the preamble flag if appropriate */
 572         if (rx_hdr->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
 573                 rx_status.flag |= RX_FLAG_SHORTPRE;
 574
 575         if ((unlikely(rx_stats->phy_count > 20))) {
 576                 D_DROP("dsp size out of range [0,20]: %d\n",
 577                        rx_stats->phy_count);
 578                 return;
 579         }
 580
 581         if (!(rx_end->status & RX_RES_STATUS_NO_CRC32_ERROR) ||
 582             !(rx_end->status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
 583                 D_RX("Bad CRC or FIFO: 0x%08X.\n", rx_end->status);
 584                 return;
 585         }
 586
 587         /* Convert 3945's rssi indicator to dBm */
 588         rx_status.signal = rx_stats->rssi - IL39_RSSI_OFFSET;
 589
 590         D_STATS("Rssi %d sig_avg %d noise_diff %d\n", rx_status.signal,
 591                 rx_stats_sig_avg, rx_stats_noise_diff);
 592
 593         header = (struct ieee80211_hdr *)IL_RX_DATA(pkt);
 594
 595         network_packet = il3945_is_network_packet(il, header);
 596
 597         D_STATS("[%c] %d RSSI:%d Signal:%u, Rate:%u\n",
 598                 network_packet ? '*' : ' ', le16_to_cpu(rx_hdr->channel),
 599                 rx_status.signal, rx_status.signal, rx_status.rate_idx);
 600
 601         if (network_packet) {
 602                 il->_3945.last_beacon_time =
 603                     le32_to_cpu(rx_end->beacon_timestamp);
 604                 il->_3945.last_tsf = le64_to_cpu(rx_end->timestamp);
 605                 il->_3945.last_rx_rssi = rx_status.signal;
 606         }
 607
 608         il3945_pass_packet_to_mac80211(il, rxb, &rx_status);
 609 }
 610
 611 int
 612 il3945_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
 613                                 dma_addr_t addr, u16 len, u8 reset, u8 pad)
 614 {
 615         int count;
 616         struct il_queue *q;
 617         struct il3945_tfd *tfd, *tfd_tmp;
 618
 619         q = &txq->q;
 620         tfd_tmp = (struct il3945_tfd *)txq->tfds;
 621         tfd = &tfd_tmp[q->write_ptr];
 622
 623         if (reset)
 624                 memset(tfd, 0, sizeof(*tfd));
 625
 626         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 627
 628         if (count >= NUM_TFD_CHUNKS || count < 0) {
 629                 IL_ERR("Error can not send more than %d chunks\n",
 630                        NUM_TFD_CHUNKS);
 631                 return -EINVAL;
 632         }
 633
 634         tfd->tbs[count].addr = cpu_to_le32(addr);
 635         tfd->tbs[count].len = cpu_to_le32(len);
 636
 637         count++;
 638
 639         tfd->control_flags =
 640             cpu_to_le32(TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad));
 641
 642         return 0;
 643 }
 644
 645 /**
 646  * il3945_hw_txq_free_tfd - Free one TFD, those at idx [txq->q.read_ptr]
 647  *
 648  * Does NOT advance any idxes
 649  */
 650 void
 651 il3945_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
 652 {
 653         struct il3945_tfd *tfd_tmp = (struct il3945_tfd *)txq->tfds;
 654         int idx = txq->q.read_ptr;
 655         struct il3945_tfd *tfd = &tfd_tmp[idx];
 656         struct pci_dev *dev = il->pci_dev;
 657         int i;
 658         int counter;
 659
 660         /* sanity check */
 661         counter = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
 662         if (counter > NUM_TFD_CHUNKS) {
 663                 IL_ERR("Too many chunks: %i\n", counter);
 664                 /* @todo issue fatal error, it is quite serious situation */
 665                 return;
 666         }
 667
 668         /* Unmap tx_cmd */
 669         if (counter)
 670                 pci_unmap_single(dev, dma_unmap_addr(&txq->meta[idx], mapping),
 671                                  dma_unmap_len(&txq->meta[idx], len),
 672                                  PCI_DMA_TODEVICE);
 673
 674         /* unmap chunks if any */
 675
 676         for (i = 1; i < counter; i++)
 677                 pci_unmap_single(dev, le32_to_cpu(tfd->tbs[i].addr),
 678                                  le32_to_cpu(tfd->tbs[i].len),
 679                                  PCI_DMA_TODEVICE);
 680
 681         /* free SKB */
 682         if (txq->skbs) {
 683                 struct sk_buff *skb = txq->skbs[txq->q.read_ptr];
 684
 685                 /* can be called from irqs-disabled context */
 686                 if (skb) {
 687                         dev_kfree_skb_any(skb);
 688                         txq->skbs[txq->q.read_ptr] = NULL;
 689                 }
 690         }
 691 }
 692
 693 /**
 694  * il3945_hw_build_tx_cmd_rate - Add rate portion to TX_CMD:
 695  *
 696 */
 697 void
 698 il3945_hw_build_tx_cmd_rate(struct il_priv *il, struct il_device_cmd *cmd,
 699                             struct ieee80211_tx_info *info,
 700                             struct ieee80211_hdr *hdr, int sta_id)
 701 {
 702         u16 hw_value = ieee80211_get_tx_rate(il->hw, info)->hw_value;
 703         u16 rate_idx = min(hw_value & 0xffff, RATE_COUNT_3945 - 1);
 704         u16 rate_mask;
 705         int rate;
 706         const u8 rts_retry_limit = 7;
 707         u8 data_retry_limit;
 708         __le32 tx_flags;
 709         __le16 fc = hdr->frame_control;
 710         struct il3945_tx_cmd *tx_cmd = (struct il3945_tx_cmd *)cmd->cmd.payload;
 711
 712         rate = il3945_rates[rate_idx].plcp;
 713         tx_flags = tx_cmd->tx_flags;
 714
 715         /* We need to figure out how to get the sta->supp_rates while
 716          * in this running context */
 717         rate_mask = RATES_MASK_3945;
 718
 719         /* Set retry limit on DATA packets and Probe Responses */
 720         if (ieee80211_is_probe_resp(fc))
 721                 data_retry_limit = 3;
 722         else
 723                 data_retry_limit = IL_DEFAULT_TX_RETRY;
 724         tx_cmd->data_retry_limit = data_retry_limit;
 725         /* Set retry limit on RTS packets */
 726         tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);
 727
 728         tx_cmd->rate = rate;
 729         tx_cmd->tx_flags = tx_flags;
 730
 731         /* OFDM */
 732         tx_cmd->supp_rates[0] =
 733             ((rate_mask & IL_OFDM_RATES_MASK) >> IL_FIRST_OFDM_RATE) & 0xFF;
 734
 735         /* CCK */
 736         tx_cmd->supp_rates[1] = (rate_mask & 0xF);
 737
 738         D_RATE("Tx sta id: %d, rate: %d (plcp), flags: 0x%4X "
 739                "cck/ofdm mask: 0x%x/0x%x\n", sta_id, tx_cmd->rate,
 740                le32_to_cpu(tx_cmd->tx_flags), tx_cmd->supp_rates[1],
 741                tx_cmd->supp_rates[0]);
 742 }
 743
 744 static u8
 745 il3945_sync_sta(struct il_priv *il, int sta_id, u16 tx_rate)
 746 {
 747         unsigned long flags_spin;
 748         struct il_station_entry *station;
 749
 750         if (sta_id == IL_INVALID_STATION)
 751                 return IL_INVALID_STATION;
 752
 753         spin_lock_irqsave(&il->sta_lock, flags_spin);
 754         station = &il->stations[sta_id];
 755
 756         station->sta.sta.modify_mask = STA_MODIFY_TX_RATE_MSK;
 757         station->sta.rate_n_flags = cpu_to_le16(tx_rate);
 758         station->sta.mode = STA_CONTROL_MODIFY_MSK;
 759         il_send_add_sta(il, &station->sta, CMD_ASYNC);
 760         spin_unlock_irqrestore(&il->sta_lock, flags_spin);
 761
 762         D_RATE("SCALE sync station %d to rate %d\n", sta_id, tx_rate);
 763         return sta_id;
 764 }
 765
 766 static void
 767 il3945_set_pwr_vmain(struct il_priv *il)
 768 {
 769 /*
 770  * (for documentation purposes)
 771  * to set power to V_AUX, do
 772
 773                 if (pci_pme_capable(il->pci_dev, PCI_D3cold)) {
 774                         il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
 775                                         APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 776                                         ~APMG_PS_CTRL_MSK_PWR_SRC);
 777
 778                         _il_poll_bit(il, CSR_GPIO_IN,
 779                                      CSR_GPIO_IN_VAL_VAUX_PWR_SRC,
 780                                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
 781                 }
 782  */
 783
 784         il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
 785                               APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 786                               ~APMG_PS_CTRL_MSK_PWR_SRC);
 787
 788         _il_poll_bit(il, CSR_GPIO_IN, CSR_GPIO_IN_VAL_VMAIN_PWR_SRC,
 789                      CSR_GPIO_IN_BIT_AUX_POWER, 5000);
 790 }
 791
 792 static int
 793 il3945_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
 794 {
 795         il_wr(il, FH39_RCSR_RBD_BASE(0), rxq->bd_dma);
 796         il_wr(il, FH39_RCSR_RPTR_ADDR(0), rxq->rb_stts_dma);
 797         il_wr(il, FH39_RCSR_WPTR(0), 0);
 798         il_wr(il, FH39_RCSR_CONFIG(0),
 799               FH39_RCSR_RX_CONFIG_REG_VAL_DMA_CHNL_EN_ENABLE |
 800               FH39_RCSR_RX_CONFIG_REG_VAL_RDRBD_EN_ENABLE |
 801               FH39_RCSR_RX_CONFIG_REG_BIT_WR_STTS_EN |
 802               FH39_RCSR_RX_CONFIG_REG_VAL_MAX_FRAG_SIZE_128 | (RX_QUEUE_SIZE_LOG
 803                                                                <<
 804                                                                FH39_RCSR_RX_CONFIG_REG_POS_RBDC_SIZE)
 805               | FH39_RCSR_RX_CONFIG_REG_VAL_IRQ_DEST_INT_HOST | (1 <<
 806                                                                  FH39_RCSR_RX_CONFIG_REG_POS_IRQ_RBTH)
 807               | FH39_RCSR_RX_CONFIG_REG_VAL_MSG_MODE_FH);
 808
 809         /* fake read to flush all prev I/O */
 810         il_rd(il, FH39_RSSR_CTRL);
 811
 812         return 0;
 813 }
 814
 815 static int
 816 il3945_tx_reset(struct il_priv *il)
 817 {
 818         /* bypass mode */
 819         il_wr_prph(il, ALM_SCD_MODE_REG, 0x2);
 820
 821         /* RA 0 is active */
 822         il_wr_prph(il, ALM_SCD_ARASTAT_REG, 0x01);
 823
 824         /* all 6 fifo are active */
 825         il_wr_prph(il, ALM_SCD_TXFACT_REG, 0x3f);
 826
 827         il_wr_prph(il, ALM_SCD_SBYP_MODE_1_REG, 0x010000);
 828         il_wr_prph(il, ALM_SCD_SBYP_MODE_2_REG, 0x030002);
 829         il_wr_prph(il, ALM_SCD_TXF4MF_REG, 0x000004);
 830         il_wr_prph(il, ALM_SCD_TXF5MF_REG, 0x000005);
 831
 832         il_wr(il, FH39_TSSR_CBB_BASE, il->_3945.shared_phys);
 833
 834         il_wr(il, FH39_TSSR_MSG_CONFIG,
 835               FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TXPD_ON |
 836               FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_TXPD_ON |
 837               FH39_TSSR_TX_MSG_CONFIG_REG_VAL_MAX_FRAG_SIZE_128B |
 838               FH39_TSSR_TX_MSG_CONFIG_REG_VAL_SNOOP_RD_TFD_ON |
 839               FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RD_CBB_ON |
 840               FH39_TSSR_TX_MSG_CONFIG_REG_VAL_ORDER_RSP_WAIT_TH |
 841               FH39_TSSR_TX_MSG_CONFIG_REG_VAL_RSP_WAIT_TH);
 842
 843         return 0;
 844 }
 845
 846 /**
 847  * il3945_txq_ctx_reset - Reset TX queue context
 848  *
 849  * Destroys all DMA structures and initialize them again
 850  */
 851 static int
 852 il3945_txq_ctx_reset(struct il_priv *il)
 853 {
 854         int rc, txq_id;
 855
 856         il3945_hw_txq_ctx_free(il);
 857
 858         /* allocate tx queue structure */
 859         rc = il_alloc_txq_mem(il);
 860         if (rc)
 861                 return rc;
 862
 863         /* Tx CMD queue */
 864         rc = il3945_tx_reset(il);
 865         if (rc)
 866                 goto error;
 867
 868         /* Tx queue(s) */
 869         for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
 870                 rc = il_tx_queue_init(il, txq_id);
 871                 if (rc) {
 872                         IL_ERR("Tx %d queue init failed\n", txq_id);
 873                         goto error;
 874                 }
 875         }
 876
 877         return rc;
 878
 879 error:
 880         il3945_hw_txq_ctx_free(il);
 881         return rc;
 882 }
 883
 884 /*
 885  * Start up 3945's basic functionality after it has been reset
 886  * (e.g. after platform boot, or shutdown via il_apm_stop())
 887  * NOTE:  This does not load uCode nor start the embedded processor
 888  */
 889 static int
 890 il3945_apm_init(struct il_priv *il)
 891 {
 892         int ret = il_apm_init(il);
 893
 894         /* Clear APMG (NIC's internal power management) interrupts */
 895         il_wr_prph(il, APMG_RTC_INT_MSK_REG, 0x0);
 896         il_wr_prph(il, APMG_RTC_INT_STT_REG, 0xFFFFFFFF);
 897
 898         /* Reset radio chip */
 899         il_set_bits_prph(il, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
 900         udelay(5);
 901         il_clear_bits_prph(il, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
 902
 903         return ret;
 904 }
 905
 906 static void
 907 il3945_nic_config(struct il_priv *il)
 908 {
 909         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
 910         unsigned long flags;
 911         u8 rev_id = il->pci_dev->revision;
 912
 913         spin_lock_irqsave(&il->lock, flags);
 914
 915         /* Determine HW type */
 916         D_INFO("HW Revision ID = 0x%X\n", rev_id);
 917
 918         if (rev_id & PCI_CFG_REV_ID_BIT_RTP)
 919                 D_INFO("RTP type\n");
 920         else if (rev_id & PCI_CFG_REV_ID_BIT_BASIC_SKU) {
 921                 D_INFO("3945 RADIO-MB type\n");
 922                 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
 923                            CSR39_HW_IF_CONFIG_REG_BIT_3945_MB);
 924         } else {
 925                 D_INFO("3945 RADIO-MM type\n");
 926                 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
 927                            CSR39_HW_IF_CONFIG_REG_BIT_3945_MM);
 928         }
 929
 930         if (EEPROM_SKU_CAP_OP_MODE_MRC == eeprom->sku_cap) {
 931                 D_INFO("SKU OP mode is mrc\n");
 932                 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
 933                            CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC);
 934         } else
 935                 D_INFO("SKU OP mode is basic\n");
 936
 937         if ((eeprom->board_revision & 0xF0) == 0xD0) {
 938                 D_INFO("3945ABG revision is 0x%X\n", eeprom->board_revision);
 939                 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
 940                            CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
 941         } else {
 942                 D_INFO("3945ABG revision is 0x%X\n", eeprom->board_revision);
 943                 il_clear_bit(il, CSR_HW_IF_CONFIG_REG,
 944                              CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE);
 945         }
 946
 947         if (eeprom->almgor_m_version <= 1) {
 948                 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
 949                            CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A);
 950                 D_INFO("Card M type A version is 0x%X\n",
 951                        eeprom->almgor_m_version);
 952         } else {
 953                 D_INFO("Card M type B version is 0x%X\n",
 954                        eeprom->almgor_m_version);
 955                 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
 956                            CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B);
 957         }
 958         spin_unlock_irqrestore(&il->lock, flags);
 959
 960         if (eeprom->sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
 961                 D_RF_KILL("SW RF KILL supported in EEPROM.\n");
 962
 963         if (eeprom->sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
 964                 D_RF_KILL("HW RF KILL supported in EEPROM.\n");
 965 }
 966
 967 int
 968 il3945_hw_nic_init(struct il_priv *il)
 969 {
 970         int rc;
 971         unsigned long flags;
 972         struct il_rx_queue *rxq = &il->rxq;
 973
 974         spin_lock_irqsave(&il->lock, flags);
 975         il3945_apm_init(il);
 976         spin_unlock_irqrestore(&il->lock, flags);
 977
 978         il3945_set_pwr_vmain(il);
 979         il3945_nic_config(il);
 980
 981         /* Allocate the RX queue, or reset if it is already allocated */
 982         if (!rxq->bd) {
 983                 rc = il_rx_queue_alloc(il);
 984                 if (rc) {
 985                         IL_ERR("Unable to initialize Rx queue\n");
 986                         return -ENOMEM;
 987                 }
 988         } else
 989                 il3945_rx_queue_reset(il, rxq);
 990
 991         il3945_rx_replenish(il);
 992
 993         il3945_rx_init(il, rxq);
 994
 995         /* Look at using this instead:
 996            rxq->need_update = 1;
 997            il_rx_queue_update_write_ptr(il, rxq);
 998          */
 999
1000         il_wr(il, FH39_RCSR_WPTR(0), rxq->write & ~7);
1001
1002         rc = il3945_txq_ctx_reset(il);
1003         if (rc)
1004                 return rc;
1005
1006         set_bit(S_INIT, &il->status);
1007
1008         return 0;
1009 }
1010
1011 /**
1012  * il3945_hw_txq_ctx_free - Free TXQ Context
1013  *
1014  * Destroy all TX DMA queues and structures
1015  */
1016 void
1017 il3945_hw_txq_ctx_free(struct il_priv *il)
1018 {
1019         int txq_id;
1020
1021         /* Tx queues */
1022         if (il->txq) {
1023                 for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
1024                         if (txq_id == IL39_CMD_QUEUE_NUM)
1025                                 il_cmd_queue_free(il);
1026                         else
1027                                 il_tx_queue_free(il, txq_id);
1028         }
1029
1030         /* free tx queue structure */
1031         il_free_txq_mem(il);
1032 }
1033
1034 void
1035 il3945_hw_txq_ctx_stop(struct il_priv *il)
1036 {
1037         int txq_id;
1038
1039         /* stop SCD */
1040         _il_wr_prph(il, ALM_SCD_MODE_REG, 0);
1041         _il_wr_prph(il, ALM_SCD_TXFACT_REG, 0);
1042
1043         /* reset TFD queues */
1044         for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
1045                 _il_wr(il, FH39_TCSR_CONFIG(txq_id), 0x0);
1046                 _il_poll_bit(il, FH39_TSSR_TX_STATUS,
1047                              FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
1048                              FH39_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(txq_id),
1049                              1000);
1050         }
1051 }
1052
1053 /**
1054  * il3945_hw_reg_adjust_power_by_temp
1055  * return idx delta into power gain settings table
1056 */
1057 static int
1058 il3945_hw_reg_adjust_power_by_temp(int new_reading, int old_reading)
1059 {
1060         return (new_reading - old_reading) * (-11) / 100;
1061 }
1062
1063 /**
1064  * il3945_hw_reg_temp_out_of_range - Keep temperature in sane range
1065  */
1066 static inline int
1067 il3945_hw_reg_temp_out_of_range(int temperature)
1068 {
1069         return (temperature < -260 || temperature > 25) ? 1 : 0;
1070 }
1071
1072 int
1073 il3945_hw_get_temperature(struct il_priv *il)
1074 {
1075         return _il_rd(il, CSR_UCODE_DRV_GP2);
1076 }
1077
1078 /**
1079  * il3945_hw_reg_txpower_get_temperature
1080  * get the current temperature by reading from NIC
1081 */
1082 static int
1083 il3945_hw_reg_txpower_get_temperature(struct il_priv *il)
1084 {
1085         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1086         int temperature;
1087
1088         temperature = il3945_hw_get_temperature(il);
1089
1090         /* driver's okay range is -260 to +25.
1091          *   human readable okay range is 0 to +285 */
1092         D_INFO("Temperature: %d\n", temperature + IL_TEMP_CONVERT);
1093
1094         /* handle insane temp reading */
1095         if (il3945_hw_reg_temp_out_of_range(temperature)) {
1096                 IL_ERR("Error bad temperature value  %d\n", temperature);
1097
1098                 /* if really really hot(?),
1099                  *   substitute the 3rd band/group's temp measured at factory */
1100                 if (il->last_temperature > 100)
1101                         temperature = eeprom->groups[2].temperature;
1102                 else            /* else use most recent "sane" value from driver */
1103                         temperature = il->last_temperature;
1104         }
1105
1106         return temperature;     /* raw, not "human readable" */
1107 }
1108
1109 /* Adjust Txpower only if temperature variance is greater than threshold.
1110  *
1111  * Both are lower than older versions' 9 degrees */
1112 #define IL_TEMPERATURE_LIMIT_TIMER   6
1113
1114 /**
1115  * il3945_is_temp_calib_needed - determines if new calibration is needed
1116  *
1117  * records new temperature in tx_mgr->temperature.
1118  * replaces tx_mgr->last_temperature *only* if calib needed
1119  *    (assumes caller will actually do the calibration!). */
1120 static int
1121 il3945_is_temp_calib_needed(struct il_priv *il)
1122 {
1123         int temp_diff;
1124
1125         il->temperature = il3945_hw_reg_txpower_get_temperature(il);
1126         temp_diff = il->temperature - il->last_temperature;
1127
1128         /* get absolute value */
1129         if (temp_diff < 0) {
1130                 D_POWER("Getting cooler, delta %d,\n", temp_diff);
1131                 temp_diff = -temp_diff;
1132         } else if (temp_diff == 0)
1133                 D_POWER("Same temp,\n");
1134         else
1135                 D_POWER("Getting warmer, delta %d,\n", temp_diff);
1136
1137         /* if we don't need calibration, *don't* update last_temperature */
1138         if (temp_diff < IL_TEMPERATURE_LIMIT_TIMER) {
1139                 D_POWER("Timed thermal calib not needed\n");
1140                 return 0;
1141         }
1142
1143         D_POWER("Timed thermal calib needed\n");
1144
1145         /* assume that caller will actually do calib ...
1146          *   update the "last temperature" value */
1147         il->last_temperature = il->temperature;
1148         return 1;
1149 }
1150
1151 #define IL_MAX_GAIN_ENTRIES 78
1152 #define IL_CCK_FROM_OFDM_POWER_DIFF  -5
1153 #define IL_CCK_FROM_OFDM_IDX_DIFF (10)
1154
1155 /* radio and DSP power table, each step is 1/2 dB.
1156  * 1st number is for RF analog gain, 2nd number is for DSP pre-DAC gain. */
1157 static struct il3945_tx_power power_gain_table[2][IL_MAX_GAIN_ENTRIES] = {
1158         {
1159          {251, 127},            /* 2.4 GHz, highest power */
1160          {251, 127},
1161          {251, 127},
1162          {251, 127},
1163          {251, 125},
1164          {251, 110},
1165          {251, 105},
1166          {251, 98},
1167          {187, 125},
1168          {187, 115},
1169          {187, 108},
1170          {187, 99},
1171          {243, 119},
1172          {243, 111},
1173          {243, 105},
1174          {243, 97},
1175          {243, 92},
1176          {211, 106},
1177          {211, 100},
1178          {179, 120},
1179          {179, 113},
1180          {179, 107},
1181          {147, 125},
1182          {147, 119},
1183          {147, 112},
1184          {147, 106},
1185          {147, 101},
1186          {147, 97},
1187          {147, 91},
1188          {115, 107},
1189          {235, 121},
1190          {235, 115},
1191          {235, 109},
1192          {203, 127},
1193          {203, 121},
1194          {203, 115},
1195          {203, 108},
1196          {203, 102},
1197          {203, 96},
1198          {203, 92},
1199          {171, 110},
1200          {171, 104},
1201          {171, 98},
1202          {139, 116},
1203          {227, 125},
1204          {227, 119},
1205          {227, 113},
1206          {227, 107},
1207          {227, 101},
1208          {227, 96},
1209          {195, 113},
1210          {195, 106},
1211          {195, 102},
1212          {195, 95},
1213          {163, 113},
1214          {163, 106},
1215          {163, 102},
1216          {163, 95},
1217          {131, 113},
1218          {131, 106},
1219          {131, 102},
1220          {131, 95},
1221          {99, 113},
1222          {99, 106},
1223          {99, 102},
1224          {99, 95},
1225          {67, 113},
1226          {67, 106},
1227          {67, 102},
1228          {67, 95},
1229          {35, 113},
1230          {35, 106},
1231          {35, 102},
1232          {35, 95},
1233          {3, 113},
1234          {3, 106},
1235          {3, 102},
1236          {3, 95}                /* 2.4 GHz, lowest power */
1237         },
1238         {
1239          {251, 127},            /* 5.x GHz, highest power */
1240          {251, 120},
1241          {251, 114},
1242          {219, 119},
1243          {219, 101},
1244          {187, 113},
1245          {187, 102},
1246          {155, 114},
1247          {155, 103},
1248          {123, 117},
1249          {123, 107},
1250          {123, 99},
1251          {123, 92},
1252          {91, 108},
1253          {59, 125},
1254          {59, 118},
1255          {59, 109},
1256          {59, 102},
1257          {59, 96},
1258          {59, 90},
1259          {27, 104},
1260          {27, 98},
1261          {27, 92},
1262          {115, 118},
1263          {115, 111},
1264          {115, 104},
1265          {83, 126},
1266          {83, 121},
1267          {83, 113},
1268          {83, 105},
1269          {83, 99},
1270          {51, 118},
1271          {51, 111},
1272          {51, 104},
1273          {51, 98},
1274          {19, 116},
1275          {19, 109},
1276          {19, 102},
1277          {19, 98},
1278          {19, 93},
1279          {171, 113},
1280          {171, 107},
1281          {171, 99},
1282          {139, 120},
1283          {139, 113},
1284          {139, 107},
1285          {139, 99},
1286          {107, 120},
1287          {107, 113},
1288          {107, 107},
1289          {107, 99},
1290          {75, 120},
1291          {75, 113},
1292          {75, 107},
1293          {75, 99},
1294          {43, 120},
1295          {43, 113},
1296          {43, 107},
1297          {43, 99},
1298          {11, 120},
1299          {11, 113},
1300          {11, 107},
1301          {11, 99},
1302          {131, 107},
1303          {131, 99},
1304          {99, 120},
1305          {99, 113},
1306          {99, 107},
1307          {99, 99},
1308          {67, 120},
1309          {67, 113},
1310          {67, 107},
1311          {67, 99},
1312          {35, 120},
1313          {35, 113},
1314          {35, 107},
1315          {35, 99},
1316          {3, 120}               /* 5.x GHz, lowest power */
1317         }
1318 };
1319
1320 static inline u8
1321 il3945_hw_reg_fix_power_idx(int idx)
1322 {
1323         if (idx < 0)
1324                 return 0;
1325         if (idx >= IL_MAX_GAIN_ENTRIES)
1326                 return IL_MAX_GAIN_ENTRIES - 1;
1327         return (u8) idx;
1328 }
1329
1330 /* Kick off thermal recalibration check every 60 seconds */
1331 #define REG_RECALIB_PERIOD (60)
1332
1333 /**
1334  * il3945_hw_reg_set_scan_power - Set Tx power for scan probe requests
1335  *
1336  * Set (in our channel info database) the direct scan Tx power for 1 Mbit (CCK)
1337  * or 6 Mbit (OFDM) rates.
1338  */
1339 static void
1340 il3945_hw_reg_set_scan_power(struct il_priv *il, u32 scan_tbl_idx, s32 rate_idx,
1341                              const s8 *clip_pwrs,
1342                              struct il_channel_info *ch_info, int band_idx)
1343 {
1344         struct il3945_scan_power_info *scan_power_info;
1345         s8 power;
1346         u8 power_idx;
1347
1348         scan_power_info = &ch_info->scan_pwr_info[scan_tbl_idx];
1349
1350         /* use this channel group's 6Mbit clipping/saturation pwr,
1351          *   but cap at regulatory scan power restriction (set during init
1352          *   based on eeprom channel data) for this channel.  */
1353         power = min(ch_info->scan_power, clip_pwrs[RATE_6M_IDX_TBL]);
1354
1355         power = min(power, il->tx_power_user_lmt);
1356         scan_power_info->requested_power = power;
1357
1358         /* find difference between new scan *power* and current "normal"
1359          *   Tx *power* for 6Mb.  Use this difference (x2) to adjust the
1360          *   current "normal" temperature-compensated Tx power *idx* for
1361          *   this rate (1Mb or 6Mb) to yield new temp-compensated scan power
1362          *   *idx*. */
1363         power_idx =
1364             ch_info->power_info[rate_idx].power_table_idx - (power -
1365                                                              ch_info->
1366                                                              power_info
1367                                                              [RATE_6M_IDX_TBL].
1368                                                              requested_power) *
1369             2;
1370
1371         /* store reference idx that we use when adjusting *all* scan
1372          *   powers.  So we can accommodate user (all channel) or spectrum
1373          *   management (single channel) power changes "between" temperature
1374          *   feedback compensation procedures.
1375          * don't force fit this reference idx into gain table; it may be a
1376          *   negative number.  This will help avoid errors when we're at
1377          *   the lower bounds (highest gains, for warmest temperatures)
1378          *   of the table. */
1379
1380         /* don't exceed table bounds for "real" setting */
1381         power_idx = il3945_hw_reg_fix_power_idx(power_idx);
1382
1383         scan_power_info->power_table_idx = power_idx;
1384         scan_power_info->tpc.tx_gain =
1385             power_gain_table[band_idx][power_idx].tx_gain;
1386         scan_power_info->tpc.dsp_atten =
1387             power_gain_table[band_idx][power_idx].dsp_atten;
1388 }
1389
1390 /**
1391  * il3945_send_tx_power - fill in Tx Power command with gain settings
1392  *
1393  * Configures power settings for all rates for the current channel,
1394  * using values from channel info struct, and send to NIC
1395  */
1396 static int
1397 il3945_send_tx_power(struct il_priv *il)
1398 {
1399         int rate_idx, i;
1400         const struct il_channel_info *ch_info = NULL;
1401         struct il3945_txpowertable_cmd txpower = {
1402                 .channel = il->active.channel,
1403         };
1404         u16 chan;
1405
1406         if (WARN_ONCE
1407             (test_bit(S_SCAN_HW, &il->status),
1408              "TX Power requested while scanning!\n"))
1409                 return -EAGAIN;
1410
1411         chan = le16_to_cpu(il->active.channel);
1412
1413         txpower.band = (il->band == IEEE80211_BAND_5GHZ) ? 0 : 1;
1414         ch_info = il_get_channel_info(il, il->band, chan);
1415         if (!ch_info) {
1416                 IL_ERR("Failed to get channel info for channel %d [%d]\n", chan,
1417                        il->band);
1418                 return -EINVAL;
1419         }
1420
1421         if (!il_is_channel_valid(ch_info)) {
1422                 D_POWER("Not calling TX_PWR_TBL_CMD on " "non-Tx channel.\n");
1423                 return 0;
1424         }
1425
1426         /* fill cmd with power settings for all rates for current channel */
1427         /* Fill OFDM rate */
1428         for (rate_idx = IL_FIRST_OFDM_RATE, i = 0;
1429              rate_idx <= IL39_LAST_OFDM_RATE; rate_idx++, i++) {
1430
1431                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1432                 txpower.power[i].rate = il3945_rates[rate_idx].plcp;
1433
1434                 D_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1435                         le16_to_cpu(txpower.channel), txpower.band,
1436                         txpower.power[i].tpc.tx_gain,
1437                         txpower.power[i].tpc.dsp_atten, txpower.power[i].rate);
1438         }
1439         /* Fill CCK rates */
1440         for (rate_idx = IL_FIRST_CCK_RATE; rate_idx <= IL_LAST_CCK_RATE;
1441              rate_idx++, i++) {
1442                 txpower.power[i].tpc = ch_info->power_info[i].tpc;
1443                 txpower.power[i].rate = il3945_rates[rate_idx].plcp;
1444
1445                 D_POWER("ch %d:%d rf %d dsp %3d rate code 0x%02x\n",
1446                         le16_to_cpu(txpower.channel), txpower.band,
1447                         txpower.power[i].tpc.tx_gain,
1448                         txpower.power[i].tpc.dsp_atten, txpower.power[i].rate);
1449         }
1450
1451         return il_send_cmd_pdu(il, C_TX_PWR_TBL,
1452                                sizeof(struct il3945_txpowertable_cmd),
1453                                &txpower);
1454
1455 }
1456
1457 /**
1458  * il3945_hw_reg_set_new_power - Configures power tables at new levels
1459  * @ch_info: Channel to update.  Uses power_info.requested_power.
1460  *
1461  * Replace requested_power and base_power_idx ch_info fields for
1462  * one channel.
1463  *
1464  * Called if user or spectrum management changes power preferences.
1465  * Takes into account h/w and modulation limitations (clip power).
1466  *
1467  * This does *not* send anything to NIC, just sets up ch_info for one channel.
1468  *
1469  * NOTE: reg_compensate_for_temperature_dif() *must* be run after this to
1470  *       properly fill out the scan powers, and actual h/w gain settings,
1471  *       and send changes to NIC
1472  */
1473 static int
1474 il3945_hw_reg_set_new_power(struct il_priv *il, struct il_channel_info *ch_info)
1475 {
1476         struct il3945_channel_power_info *power_info;
1477         int power_changed = 0;
1478         int i;
1479         const s8 *clip_pwrs;
1480         int power;
1481
1482         /* Get this chnlgrp's rate-to-max/clip-powers table */
1483         clip_pwrs = il->_3945.clip_groups[ch_info->group_idx].clip_powers;
1484
1485         /* Get this channel's rate-to-current-power settings table */
1486         power_info = ch_info->power_info;
1487
1488         /* update OFDM Txpower settings */
1489         for (i = RATE_6M_IDX_TBL; i <= RATE_54M_IDX_TBL; i++, ++power_info) {
1490                 int delta_idx;
1491
1492                 /* limit new power to be no more than h/w capability */
1493                 power = min(ch_info->curr_txpow, clip_pwrs[i]);
1494                 if (power == power_info->requested_power)
1495                         continue;
1496
1497                 /* find difference between old and new requested powers,
1498                  *    update base (non-temp-compensated) power idx */
1499                 delta_idx = (power - power_info->requested_power) * 2;
1500                 power_info->base_power_idx -= delta_idx;
1501
1502                 /* save new requested power value */
1503                 power_info->requested_power = power;
1504
1505                 power_changed = 1;
1506         }
1507
1508         /* update CCK Txpower settings, based on OFDM 12M setting ...
1509          *    ... all CCK power settings for a given channel are the *same*. */
1510         if (power_changed) {
1511                 power =
1512                     ch_info->power_info[RATE_12M_IDX_TBL].requested_power +
1513                     IL_CCK_FROM_OFDM_POWER_DIFF;
1514
1515                 /* do all CCK rates' il3945_channel_power_info structures */
1516                 for (i = RATE_1M_IDX_TBL; i <= RATE_11M_IDX_TBL; i++) {
1517                         power_info->requested_power = power;
1518                         power_info->base_power_idx =
1519                             ch_info->power_info[RATE_12M_IDX_TBL].
1520                             base_power_idx + IL_CCK_FROM_OFDM_IDX_DIFF;
1521                         ++power_info;
1522                 }
1523         }
1524
1525         return 0;
1526 }
1527
1528 /**
1529  * il3945_hw_reg_get_ch_txpower_limit - returns new power limit for channel
1530  *
1531  * NOTE: Returned power limit may be less (but not more) than requested,
1532  *       based strictly on regulatory (eeprom and spectrum mgt) limitations
1533  *       (no consideration for h/w clipping limitations).
1534  */
1535 static int
1536 il3945_hw_reg_get_ch_txpower_limit(struct il_channel_info *ch_info)
1537 {
1538         s8 max_power;
1539
1540 #if 0
1541         /* if we're using TGd limits, use lower of TGd or EEPROM */
1542         if (ch_info->tgd_data.max_power != 0)
1543                 max_power =
1544                     min(ch_info->tgd_data.max_power,
1545                         ch_info->eeprom.max_power_avg);
1546
1547         /* else just use EEPROM limits */
1548         else
1549 #endif
1550                 max_power = ch_info->eeprom.max_power_avg;
1551
1552         return min(max_power, ch_info->max_power_avg);
1553 }
1554
1555 /**
1556  * il3945_hw_reg_comp_txpower_temp - Compensate for temperature
1557  *
1558  * Compensate txpower settings of *all* channels for temperature.
1559  * This only accounts for the difference between current temperature
1560  *   and the factory calibration temperatures, and bases the new settings
1561  *   on the channel's base_power_idx.
1562  *
1563  * If RxOn is "associated", this sends the new Txpower to NIC!
1564  */
1565 static int
1566 il3945_hw_reg_comp_txpower_temp(struct il_priv *il)
1567 {
1568         struct il_channel_info *ch_info = NULL;
1569         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1570         int delta_idx;
1571         const s8 *clip_pwrs;    /* array of h/w max power levels for each rate */
1572         u8 a_band;
1573         u8 rate_idx;
1574         u8 scan_tbl_idx;
1575         u8 i;
1576         int ref_temp;
1577         int temperature = il->temperature;
1578
1579         if (il->disable_tx_power_cal || test_bit(S_SCANNING, &il->status)) {
1580                 /* do not perform tx power calibration */
1581                 return 0;
1582         }
1583         /* set up new Tx power info for each and every channel, 2.4 and 5.x */
1584         for (i = 0; i < il->channel_count; i++) {
1585                 ch_info = &il->channel_info[i];
1586                 a_band = il_is_channel_a_band(ch_info);
1587
1588                 /* Get this chnlgrp's factory calibration temperature */
1589                 ref_temp = (s16) eeprom->groups[ch_info->group_idx].temperature;
1590
1591                 /* get power idx adjustment based on current and factory
1592                  * temps */
1593                 delta_idx =
1594                     il3945_hw_reg_adjust_power_by_temp(temperature, ref_temp);
1595
1596                 /* set tx power value for all rates, OFDM and CCK */
1597                 for (rate_idx = 0; rate_idx < RATE_COUNT_3945; rate_idx++) {
1598                         int power_idx =
1599                             ch_info->power_info[rate_idx].base_power_idx;
1600
1601                         /* temperature compensate */
1602                         power_idx += delta_idx;
1603
1604                         /* stay within table range */
1605                         power_idx = il3945_hw_reg_fix_power_idx(power_idx);
1606                         ch_info->power_info[rate_idx].power_table_idx =
1607                             (u8) power_idx;
1608                         ch_info->power_info[rate_idx].tpc =
1609                             power_gain_table[a_band][power_idx];
1610                 }
1611
1612                 /* Get this chnlgrp's rate-to-max/clip-powers table */
1613                 clip_pwrs =
1614                     il->_3945.clip_groups[ch_info->group_idx].clip_powers;
1615
1616                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
1617                 for (scan_tbl_idx = 0; scan_tbl_idx < IL_NUM_SCAN_RATES;
1618                      scan_tbl_idx++) {
1619                         s32 actual_idx =
1620                             (scan_tbl_idx ==
1621                              0) ? RATE_1M_IDX_TBL : RATE_6M_IDX_TBL;
1622                         il3945_hw_reg_set_scan_power(il, scan_tbl_idx,
1623                                                      actual_idx, clip_pwrs,
1624                                                      ch_info, a_band);
1625                 }
1626         }
1627
1628         /* send Txpower command for current channel to ucode */
1629         return il->ops->send_tx_power(il);
1630 }
1631
1632 int
1633 il3945_hw_reg_set_txpower(struct il_priv *il, s8 power)
1634 {
1635         struct il_channel_info *ch_info;
1636         s8 max_power;
1637         u8 a_band;
1638         u8 i;
1639
1640         if (il->tx_power_user_lmt == power) {
1641                 D_POWER("Requested Tx power same as current " "limit: %ddBm.\n",
1642                         power);
1643                 return 0;
1644         }
1645
1646         D_POWER("Setting upper limit clamp to %ddBm.\n", power);
1647         il->tx_power_user_lmt = power;
1648
1649         /* set up new Tx powers for each and every channel, 2.4 and 5.x */
1650
1651         for (i = 0; i < il->channel_count; i++) {
1652                 ch_info = &il->channel_info[i];
1653                 a_band = il_is_channel_a_band(ch_info);
1654
1655                 /* find minimum power of all user and regulatory constraints
1656                  *    (does not consider h/w clipping limitations) */
1657                 max_power = il3945_hw_reg_get_ch_txpower_limit(ch_info);
1658                 max_power = min(power, max_power);
1659                 if (max_power != ch_info->curr_txpow) {
1660                         ch_info->curr_txpow = max_power;
1661
1662                         /* this considers the h/w clipping limitations */
1663                         il3945_hw_reg_set_new_power(il, ch_info);
1664                 }
1665         }
1666
1667         /* update txpower settings for all channels,
1668          *   send to NIC if associated. */
1669         il3945_is_temp_calib_needed(il);
1670         il3945_hw_reg_comp_txpower_temp(il);
1671
1672         return 0;
1673 }
1674
1675 static int
1676 il3945_send_rxon_assoc(struct il_priv *il)
1677 {
1678         int rc = 0;
1679         struct il_rx_pkt *pkt;
1680         struct il3945_rxon_assoc_cmd rxon_assoc;
1681         struct il_host_cmd cmd = {
1682                 .id = C_RXON_ASSOC,
1683                 .len = sizeof(rxon_assoc),
1684                 .flags = CMD_WANT_SKB,
1685                 .data = &rxon_assoc,
1686         };
1687         const struct il_rxon_cmd *rxon1 = &il->staging;
1688         const struct il_rxon_cmd *rxon2 = &il->active;
1689
1690         if (rxon1->flags == rxon2->flags &&
1691             rxon1->filter_flags == rxon2->filter_flags &&
1692             rxon1->cck_basic_rates == rxon2->cck_basic_rates &&
1693             rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates) {
1694                 D_INFO("Using current RXON_ASSOC.  Not resending.\n");
1695                 return 0;
1696         }
1697
1698         rxon_assoc.flags = il->staging.flags;
1699         rxon_assoc.filter_flags = il->staging.filter_flags;
1700         rxon_assoc.ofdm_basic_rates = il->staging.ofdm_basic_rates;
1701         rxon_assoc.cck_basic_rates = il->staging.cck_basic_rates;
1702         rxon_assoc.reserved = 0;
1703
1704         rc = il_send_cmd_sync(il, &cmd);
1705         if (rc)
1706                 return rc;
1707
1708         pkt = (struct il_rx_pkt *)cmd.reply_page;
1709         if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1710                 IL_ERR("Bad return from C_RXON_ASSOC command\n");
1711                 rc = -EIO;
1712         }
1713
1714         il_free_pages(il, cmd.reply_page);
1715
1716         return rc;
1717 }
1718
1719 /**
1720  * il3945_commit_rxon - commit staging_rxon to hardware
1721  *
1722  * The RXON command in staging_rxon is committed to the hardware and
1723  * the active_rxon structure is updated with the new data.  This
1724  * function correctly transitions out of the RXON_ASSOC_MSK state if
1725  * a HW tune is required based on the RXON structure changes.
1726  */
1727 int
1728 il3945_commit_rxon(struct il_priv *il)
1729 {
1730         /* cast away the const for active_rxon in this function */
1731         struct il3945_rxon_cmd *active_rxon = (void *)&il->active;
1732         struct il3945_rxon_cmd *staging_rxon = (void *)&il->staging;
1733         int rc = 0;
1734         bool new_assoc = !!(staging_rxon->filter_flags & RXON_FILTER_ASSOC_MSK);
1735
1736         if (test_bit(S_EXIT_PENDING, &il->status))
1737                 return -EINVAL;
1738
1739         if (!il_is_alive(il))
1740                 return -1;
1741
1742         /* always get timestamp with Rx frame */
1743         staging_rxon->flags |= RXON_FLG_TSF2HOST_MSK;
1744
1745         /* select antenna */
1746         staging_rxon->flags &= ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
1747         staging_rxon->flags |= il3945_get_antenna_flags(il);
1748
1749         rc = il_check_rxon_cmd(il);
1750         if (rc) {
1751                 IL_ERR("Invalid RXON configuration.  Not committing.\n");
1752                 return -EINVAL;
1753         }
1754
1755         /* If we don't need to send a full RXON, we can use
1756          * il3945_rxon_assoc_cmd which is used to reconfigure filter
1757          * and other flags for the current radio configuration. */
1758         if (!il_full_rxon_required(il)) {
1759                 rc = il_send_rxon_assoc(il);
1760                 if (rc) {
1761                         IL_ERR("Error setting RXON_ASSOC "
1762                                "configuration (%d).\n", rc);
1763                         return rc;
1764                 }
1765
1766                 memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
1767                 /*
1768                  * We do not commit tx power settings while channel changing,
1769                  * do it now if tx power changed.
1770                  */
1771                 il_set_tx_power(il, il->tx_power_next, false);
1772                 return 0;
1773         }
1774
1775         /* If we are currently associated and the new config requires
1776          * an RXON_ASSOC and the new config wants the associated mask enabled,
1777          * we must clear the associated from the active configuration
1778          * before we apply the new config */
1779         if (il_is_associated(il) && new_assoc) {
1780                 D_INFO("Toggling associated bit on current RXON\n");
1781                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1782
1783                 /*
1784                  * reserved4 and 5 could have been filled by the iwlcore code.
1785                  * Let's clear them before pushing to the 3945.
1786                  */
1787                 active_rxon->reserved4 = 0;
1788                 active_rxon->reserved5 = 0;
1789                 rc = il_send_cmd_pdu(il, C_RXON, sizeof(struct il3945_rxon_cmd),
1790                                      &il->active);
1791
1792                 /* If the mask clearing failed then we set
1793                  * active_rxon back to what it was previously */
1794                 if (rc) {
1795                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1796                         IL_ERR("Error clearing ASSOC_MSK on current "
1797                                "configuration (%d).\n", rc);
1798                         return rc;
1799                 }
1800                 il_clear_ucode_stations(il);
1801                 il_restore_stations(il);
1802         }
1803
1804         D_INFO("Sending RXON\n" "* with%s RXON_FILTER_ASSOC_MSK\n"
1805                "* channel = %d\n" "* bssid = %pM\n", (new_assoc ? "" : "out"),
1806                le16_to_cpu(staging_rxon->channel), staging_rxon->bssid_addr);
1807
1808         /*
1809          * reserved4 and 5 could have been filled by the iwlcore code.
1810          * Let's clear them before pushing to the 3945.
1811          */
1812         staging_rxon->reserved4 = 0;
1813         staging_rxon->reserved5 = 0;
1814
1815         il_set_rxon_hwcrypto(il, !il3945_mod_params.sw_crypto);
1816
1817         /* Apply the new configuration */
1818         rc = il_send_cmd_pdu(il, C_RXON, sizeof(struct il3945_rxon_cmd),
1819                              staging_rxon);
1820         if (rc) {
1821                 IL_ERR("Error setting new configuration (%d).\n", rc);
1822                 return rc;
1823         }
1824
1825         memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
1826
1827         if (!new_assoc) {
1828                 il_clear_ucode_stations(il);
1829                 il_restore_stations(il);
1830         }
1831
1832         /* If we issue a new RXON command which required a tune then we must
1833          * send a new TXPOWER command or we won't be able to Tx any frames */
1834         rc = il_set_tx_power(il, il->tx_power_next, true);
1835         if (rc) {
1836                 IL_ERR("Error setting Tx power (%d).\n", rc);
1837                 return rc;
1838         }
1839
1840         /* Init the hardware's rate fallback order based on the band */
1841         rc = il3945_init_hw_rate_table(il);
1842         if (rc) {
1843                 IL_ERR("Error setting HW rate table: %02X\n", rc);
1844                 return -EIO;
1845         }
1846
1847         return 0;
1848 }
1849
1850 /**
1851  * il3945_reg_txpower_periodic -  called when time to check our temperature.
1852  *
1853  * -- reset periodic timer
1854  * -- see if temp has changed enough to warrant re-calibration ... if so:
1855  *     -- correct coeffs for temp (can reset temp timer)
1856  *     -- save this temp as "last",
1857  *     -- send new set of gain settings to NIC
1858  * NOTE:  This should continue working, even when we're not associated,
1859  *   so we can keep our internal table of scan powers current. */
1860 void
1861 il3945_reg_txpower_periodic(struct il_priv *il)
1862 {
1863         /* This will kick in the "brute force"
1864          * il3945_hw_reg_comp_txpower_temp() below */
1865         if (!il3945_is_temp_calib_needed(il))
1866                 goto reschedule;
1867
1868         /* Set up a new set of temp-adjusted TxPowers, send to NIC.
1869          * This is based *only* on current temperature,
1870          * ignoring any previous power measurements */
1871         il3945_hw_reg_comp_txpower_temp(il);
1872
1873 reschedule:
1874         queue_delayed_work(il->workqueue, &il->_3945.thermal_periodic,
1875                            REG_RECALIB_PERIOD * HZ);
1876 }
1877
1878 static void
1879 il3945_bg_reg_txpower_periodic(struct work_struct *work)
1880 {
1881         struct il_priv *il = container_of(work, struct il_priv,
1882                                           _3945.thermal_periodic.work);
1883
1884         mutex_lock(&il->mutex);
1885         if (test_bit(S_EXIT_PENDING, &il->status) || il->txq == NULL)
1886                 goto out;
1887
1888         il3945_reg_txpower_periodic(il);
1889 out:
1890         mutex_unlock(&il->mutex);
1891 }
1892
1893 /**
1894  * il3945_hw_reg_get_ch_grp_idx - find the channel-group idx (0-4) for channel.
1895  *
1896  * This function is used when initializing channel-info structs.
1897  *
1898  * NOTE: These channel groups do *NOT* match the bands above!
1899  *       These channel groups are based on factory-tested channels;
1900  *       on A-band, EEPROM's "group frequency" entries represent the top
1901  *       channel in each group 1-4.  Group 5 All B/G channels are in group 0.
1902  */
1903 static u16
1904 il3945_hw_reg_get_ch_grp_idx(struct il_priv *il,
1905                              const struct il_channel_info *ch_info)
1906 {
1907         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1908         struct il3945_eeprom_txpower_group *ch_grp = &eeprom->groups[0];
1909         u8 group;
1910         u16 group_idx = 0;      /* based on factory calib frequencies */
1911         u8 grp_channel;
1912
1913         /* Find the group idx for the channel ... don't use idx 1(?) */
1914         if (il_is_channel_a_band(ch_info)) {
1915                 for (group = 1; group < 5; group++) {
1916                         grp_channel = ch_grp[group].group_channel;
1917                         if (ch_info->channel <= grp_channel) {
1918                                 group_idx = group;
1919                                 break;
1920                         }
1921                 }
1922                 /* group 4 has a few channels *above* its factory cal freq */
1923                 if (group == 5)
1924                         group_idx = 4;
1925         } else
1926                 group_idx = 0;  /* 2.4 GHz, group 0 */
1927
1928         D_POWER("Chnl %d mapped to grp %d\n", ch_info->channel, group_idx);
1929         return group_idx;
1930 }
1931
1932 /**
1933  * il3945_hw_reg_get_matched_power_idx - Interpolate to get nominal idx
1934  *
1935  * Interpolate to get nominal (i.e. at factory calibration temperature) idx
1936  *   into radio/DSP gain settings table for requested power.
1937  */
1938 static int
1939 il3945_hw_reg_get_matched_power_idx(struct il_priv *il, s8 requested_power,
1940                                     s32 setting_idx, s32 *new_idx)
1941 {
1942         const struct il3945_eeprom_txpower_group *chnl_grp = NULL;
1943         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1944         s32 idx0, idx1;
1945         s32 power = 2 * requested_power;
1946         s32 i;
1947         const struct il3945_eeprom_txpower_sample *samples;
1948         s32 gains0, gains1;
1949         s32 res;
1950         s32 denominator;
1951
1952         chnl_grp = &eeprom->groups[setting_idx];
1953         samples = chnl_grp->samples;
1954         for (i = 0; i < 5; i++) {
1955                 if (power == samples[i].power) {
1956                         *new_idx = samples[i].gain_idx;
1957                         return 0;
1958                 }
1959         }
1960
1961         if (power > samples[1].power) {
1962                 idx0 = 0;
1963                 idx1 = 1;
1964         } else if (power > samples[2].power) {
1965                 idx0 = 1;
1966                 idx1 = 2;
1967         } else if (power > samples[3].power) {
1968                 idx0 = 2;
1969                 idx1 = 3;
1970         } else {
1971                 idx0 = 3;
1972                 idx1 = 4;
1973         }
1974
1975         denominator = (s32) samples[idx1].power - (s32) samples[idx0].power;
1976         if (denominator == 0)
1977                 return -EINVAL;
1978         gains0 = (s32) samples[idx0].gain_idx * (1 << 19);
1979         gains1 = (s32) samples[idx1].gain_idx * (1 << 19);
1980         res =
1981             gains0 + (gains1 - gains0) * ((s32) power -
1982                                           (s32) samples[idx0].power) /
1983             denominator + (1 << 18);
1984         *new_idx = res >> 19;
1985         return 0;
1986 }
1987
1988 static void
1989 il3945_hw_reg_init_channel_groups(struct il_priv *il)
1990 {
1991         u32 i;
1992         s32 rate_idx;
1993         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
1994         const struct il3945_eeprom_txpower_group *group;
1995
1996         D_POWER("Initializing factory calib info from EEPROM\n");
1997
1998         for (i = 0; i < IL_NUM_TX_CALIB_GROUPS; i++) {
1999                 s8 *clip_pwrs;  /* table of power levels for each rate */
2000                 s8 satur_pwr;   /* saturation power for each chnl group */
2001                 group = &eeprom->groups[i];
2002
2003                 /* sanity check on factory saturation power value */
2004                 if (group->saturation_power < 40) {
2005                         IL_WARN("Error: saturation power is %d, "
2006                                 "less than minimum expected 40\n",
2007                                 group->saturation_power);
2008                         return;
2009                 }
2010
2011                 /*
2012                  * Derive requested power levels for each rate, based on
2013                  *   hardware capabilities (saturation power for band).
2014                  * Basic value is 3dB down from saturation, with further
2015                  *   power reductions for highest 3 data rates.  These
2016                  *   backoffs provide headroom for high rate modulation
2017                  *   power peaks, without too much distortion (clipping).
2018                  */
2019                 /* we'll fill in this array with h/w max power levels */
2020                 clip_pwrs = (s8 *) il->_3945.clip_groups[i].clip_powers;
2021
2022                 /* divide factory saturation power by 2 to find -3dB level */
2023                 satur_pwr = (s8) (group->saturation_power >> 1);
2024
2025                 /* fill in channel group's nominal powers for each rate */
2026                 for (rate_idx = 0; rate_idx < RATE_COUNT_3945;
2027                      rate_idx++, clip_pwrs++) {
2028                         switch (rate_idx) {
2029                         case RATE_36M_IDX_TBL:
2030                                 if (i == 0)     /* B/G */
2031                                         *clip_pwrs = satur_pwr;
2032                                 else    /* A */
2033                                         *clip_pwrs = satur_pwr - 5;
2034                                 break;
2035                         case RATE_48M_IDX_TBL:
2036                                 if (i == 0)
2037                                         *clip_pwrs = satur_pwr - 7;
2038                                 else
2039                                         *clip_pwrs = satur_pwr - 10;
2040                                 break;
2041                         case RATE_54M_IDX_TBL:
2042                                 if (i == 0)
2043                                         *clip_pwrs = satur_pwr - 9;
2044                                 else
2045                                         *clip_pwrs = satur_pwr - 12;
2046                                 break;
2047                         default:
2048                                 *clip_pwrs = satur_pwr;
2049                                 break;
2050                         }
2051                 }
2052         }
2053 }
2054
2055 /**
2056  * il3945_txpower_set_from_eeprom - Set channel power info based on EEPROM
2057  *
2058  * Second pass (during init) to set up il->channel_info
2059  *
2060  * Set up Tx-power settings in our channel info database for each VALID
2061  * (for this geo/SKU) channel, at all Tx data rates, based on eeprom values
2062  * and current temperature.
2063  *
2064  * Since this is based on current temperature (at init time), these values may
2065  * not be valid for very long, but it gives us a starting/default point,
2066  * and allows us to active (i.e. using Tx) scan.
2067  *
2068  * This does *not* write values to NIC, just sets up our internal table.
2069  */
2070 int
2071 il3945_txpower_set_from_eeprom(struct il_priv *il)
2072 {
2073         struct il_channel_info *ch_info = NULL;
2074         struct il3945_channel_power_info *pwr_info;
2075         struct il3945_eeprom *eeprom = (struct il3945_eeprom *)il->eeprom;
2076         int delta_idx;
2077         u8 rate_idx;
2078         u8 scan_tbl_idx;
2079         const s8 *clip_pwrs;    /* array of power levels for each rate */
2080         u8 gain, dsp_atten;
2081         s8 power;
2082         u8 pwr_idx, base_pwr_idx, a_band;
2083         u8 i;
2084         int temperature;
2085
2086         /* save temperature reference,
2087          *   so we can determine next time to calibrate */
2088         temperature = il3945_hw_reg_txpower_get_temperature(il);
2089         il->last_temperature = temperature;
2090
2091         il3945_hw_reg_init_channel_groups(il);
2092
2093         /* initialize Tx power info for each and every channel, 2.4 and 5.x */
2094         for (i = 0, ch_info = il->channel_info; i < il->channel_count;
2095              i++, ch_info++) {
2096                 a_band = il_is_channel_a_band(ch_info);
2097                 if (!il_is_channel_valid(ch_info))
2098                         continue;
2099
2100                 /* find this channel's channel group (*not* "band") idx */
2101                 ch_info->group_idx = il3945_hw_reg_get_ch_grp_idx(il, ch_info);
2102
2103                 /* Get this chnlgrp's rate->max/clip-powers table */
2104                 clip_pwrs =
2105                     il->_3945.clip_groups[ch_info->group_idx].clip_powers;
2106
2107                 /* calculate power idx *adjustment* value according to
2108                  *  diff between current temperature and factory temperature */
2109                 delta_idx =
2110                     il3945_hw_reg_adjust_power_by_temp(temperature,
2111                                                        eeprom->groups[ch_info->
2112                                                                       group_idx].
2113                                                        temperature);
2114
2115                 D_POWER("Delta idx for channel %d: %d [%d]\n", ch_info->channel,
2116                         delta_idx, temperature + IL_TEMP_CONVERT);
2117
2118                 /* set tx power value for all OFDM rates */
2119                 for (rate_idx = 0; rate_idx < IL_OFDM_RATES; rate_idx++) {
2120                         s32 uninitialized_var(power_idx);
2121                         int rc;
2122
2123                         /* use channel group's clip-power table,
2124                          *   but don't exceed channel's max power */
2125                         s8 pwr = min(ch_info->max_power_avg,
2126                                      clip_pwrs[rate_idx]);
2127
2128                         pwr_info = &ch_info->power_info[rate_idx];
2129
2130                         /* get base (i.e. at factory-measured temperature)
2131                          *    power table idx for this rate's power */
2132                         rc = il3945_hw_reg_get_matched_power_idx(il, pwr,
2133                                                                  ch_info->
2134                                                                  group_idx,
2135                                                                  &power_idx);
2136                         if (rc) {
2137                                 IL_ERR("Invalid power idx\n");
2138                                 return rc;
2139                         }
2140                         pwr_info->base_power_idx = (u8) power_idx;
2141
2142                         /* temperature compensate */
2143                         power_idx += delta_idx;
2144
2145                         /* stay within range of gain table */
2146                         power_idx = il3945_hw_reg_fix_power_idx(power_idx);
2147
2148                         /* fill 1 OFDM rate's il3945_channel_power_info struct */
2149                         pwr_info->requested_power = pwr;
2150                         pwr_info->power_table_idx = (u8) power_idx;
2151                         pwr_info->tpc.tx_gain =
2152                             power_gain_table[a_band][power_idx].tx_gain;
2153                         pwr_info->tpc.dsp_atten =
2154                             power_gain_table[a_band][power_idx].dsp_atten;
2155                 }
2156
2157                 /* set tx power for CCK rates, based on OFDM 12 Mbit settings */
2158                 pwr_info = &ch_info->power_info[RATE_12M_IDX_TBL];
2159                 power = pwr_info->requested_power + IL_CCK_FROM_OFDM_POWER_DIFF;
2160                 pwr_idx = pwr_info->power_table_idx + IL_CCK_FROM_OFDM_IDX_DIFF;
2161                 base_pwr_idx =
2162                     pwr_info->base_power_idx + IL_CCK_FROM_OFDM_IDX_DIFF;
2163
2164                 /* stay within table range */
2165                 pwr_idx = il3945_hw_reg_fix_power_idx(pwr_idx);
2166                 gain = power_gain_table[a_band][pwr_idx].tx_gain;
2167                 dsp_atten = power_gain_table[a_band][pwr_idx].dsp_atten;
2168
2169                 /* fill each CCK rate's il3945_channel_power_info structure
2170                  * NOTE:  All CCK-rate Txpwrs are the same for a given chnl!
2171                  * NOTE:  CCK rates start at end of OFDM rates! */
2172                 for (rate_idx = 0; rate_idx < IL_CCK_RATES; rate_idx++) {
2173                         pwr_info =
2174                             &ch_info->power_info[rate_idx + IL_OFDM_RATES];
2175                         pwr_info->requested_power = power;
2176                         pwr_info->power_table_idx = pwr_idx;
2177                         pwr_info->base_power_idx = base_pwr_idx;
2178                         pwr_info->tpc.tx_gain = gain;
2179                         pwr_info->tpc.dsp_atten = dsp_atten;
2180                 }
2181
2182                 /* set scan tx power, 1Mbit for CCK, 6Mbit for OFDM */
2183                 for (scan_tbl_idx = 0; scan_tbl_idx < IL_NUM_SCAN_RATES;
2184                      scan_tbl_idx++) {
2185                         s32 actual_idx =
2186                             (scan_tbl_idx ==
2187                              0) ? RATE_1M_IDX_TBL : RATE_6M_IDX_TBL;
2188                         il3945_hw_reg_set_scan_power(il, scan_tbl_idx,
2189                                                      actual_idx, clip_pwrs,
2190                                                      ch_info, a_band);
2191                 }
2192         }
2193
2194         return 0;
2195 }
2196
2197 int
2198 il3945_hw_rxq_stop(struct il_priv *il)
2199 {
2200         int ret;
2201
2202         _il_wr(il, FH39_RCSR_CONFIG(0), 0);
2203         ret = _il_poll_bit(il, FH39_RSSR_STATUS,
2204                            FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
2205                            FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
2206                            1000);
2207         if (ret < 0)
2208                 IL_ERR("Can't stop Rx DMA.\n");
2209
2210         return 0;
2211 }
2212
2213 int
2214 il3945_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
2215 {
2216         int txq_id = txq->q.id;
2217
2218         struct il3945_shared *shared_data = il->_3945.shared_virt;
2219
2220         shared_data->tx_base_ptr[txq_id] = cpu_to_le32((u32) txq->q.dma_addr);
2221
2222         il_wr(il, FH39_CBCC_CTRL(txq_id), 0);
2223         il_wr(il, FH39_CBCC_BASE(txq_id), 0);
2224
2225         il_wr(il, FH39_TCSR_CONFIG(txq_id),
2226               FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT |
2227               FH39_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF |
2228               FH39_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD |
2229               FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL |
2230               FH39_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE);
2231
2232         /* fake read to flush all prev. writes */
2233         _il_rd(il, FH39_TSSR_CBB_BASE);
2234
2235         return 0;
2236 }
2237
2238 /*
2239  * HCMD utils
2240  */
2241 static u16
2242 il3945_get_hcmd_size(u8 cmd_id, u16 len)
2243 {
2244         switch (cmd_id) {
2245         case C_RXON:
2246                 return sizeof(struct il3945_rxon_cmd);
2247         case C_POWER_TBL:
2248                 return sizeof(struct il3945_powertable_cmd);
2249         default:
2250                 return len;
2251         }
2252 }
2253
2254 static u16
2255 il3945_build_addsta_hcmd(const struct il_addsta_cmd *cmd, u8 * data)
2256 {
2257         struct il3945_addsta_cmd *addsta = (struct il3945_addsta_cmd *)data;
2258         addsta->mode = cmd->mode;
2259         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
2260         memcpy(&addsta->key, &cmd->key, sizeof(struct il4965_keyinfo));
2261         addsta->station_flags = cmd->station_flags;
2262         addsta->station_flags_msk = cmd->station_flags_msk;
2263         addsta->tid_disable_tx = cpu_to_le16(0);
2264         addsta->rate_n_flags = cmd->rate_n_flags;
2265         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
2266         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
2267         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
2268
2269         return (u16) sizeof(struct il3945_addsta_cmd);
2270 }
2271
2272 static int
2273 il3945_add_bssid_station(struct il_priv *il, const u8 * addr, u8 * sta_id_r)
2274 {
2275         int ret;
2276         u8 sta_id;
2277         unsigned long flags;
2278
2279         if (sta_id_r)
2280                 *sta_id_r = IL_INVALID_STATION;
2281
2282         ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
2283         if (ret) {
2284                 IL_ERR("Unable to add station %pM\n", addr);
2285                 return ret;
2286         }
2287
2288         if (sta_id_r)
2289                 *sta_id_r = sta_id;
2290
2291         spin_lock_irqsave(&il->sta_lock, flags);
2292         il->stations[sta_id].used |= IL_STA_LOCAL;
2293         spin_unlock_irqrestore(&il->sta_lock, flags);
2294
2295         return 0;
2296 }
2297
2298 static int
2299 il3945_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
2300                            bool add)
2301 {
2302         struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
2303         int ret;
2304
2305         if (add) {
2306                 ret =
2307                     il3945_add_bssid_station(il, vif->bss_conf.bssid,
2308                                              &vif_priv->ibss_bssid_sta_id);
2309                 if (ret)
2310                         return ret;
2311
2312                 il3945_sync_sta(il, vif_priv->ibss_bssid_sta_id,
2313                                 (il->band ==
2314                                  IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP :
2315                                 RATE_1M_PLCP);
2316                 il3945_rate_scale_init(il->hw, vif_priv->ibss_bssid_sta_id);
2317
2318                 return 0;
2319         }
2320
2321         return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
2322                                  vif->bss_conf.bssid);
2323 }
2324
2325 /**
2326  * il3945_init_hw_rate_table - Initialize the hardware rate fallback table
2327  */
2328 int
2329 il3945_init_hw_rate_table(struct il_priv *il)
2330 {
2331         int rc, i, idx, prev_idx;
2332         struct il3945_rate_scaling_cmd rate_cmd = {
2333                 .reserved = {0, 0, 0},
2334         };
2335         struct il3945_rate_scaling_info *table = rate_cmd.table;
2336
2337         for (i = 0; i < ARRAY_SIZE(il3945_rates); i++) {
2338                 idx = il3945_rates[i].table_rs_idx;
2339
2340                 table[idx].rate_n_flags = cpu_to_le16(il3945_rates[i].plcp);
2341                 table[idx].try_cnt = il->retry_rate;
2342                 prev_idx = il3945_get_prev_ieee_rate(i);
2343                 table[idx].next_rate_idx = il3945_rates[prev_idx].table_rs_idx;
2344         }
2345
2346         switch (il->band) {
2347         case IEEE80211_BAND_5GHZ:
2348                 D_RATE("Select A mode rate scale\n");
2349                 /* If one of the following CCK rates is used,
2350                  * have it fall back to the 6M OFDM rate */
2351                 for (i = RATE_1M_IDX_TBL; i <= RATE_11M_IDX_TBL; i++)
2352                         table[i].next_rate_idx =
2353                             il3945_rates[IL_FIRST_OFDM_RATE].table_rs_idx;
2354
2355                 /* Don't fall back to CCK rates */
2356                 table[RATE_12M_IDX_TBL].next_rate_idx = RATE_9M_IDX_TBL;
2357
2358                 /* Don't drop out of OFDM rates */
2359                 table[RATE_6M_IDX_TBL].next_rate_idx =
2360                     il3945_rates[IL_FIRST_OFDM_RATE].table_rs_idx;
2361                 break;
2362
2363         case IEEE80211_BAND_2GHZ:
2364                 D_RATE("Select B/G mode rate scale\n");
2365                 /* If an OFDM rate is used, have it fall back to the
2366                  * 1M CCK rates */
2367
2368                 if (!(il->_3945.sta_supp_rates & IL_OFDM_RATES_MASK) &&
2369                     il_is_associated(il)) {
2370
2371                         idx = IL_FIRST_CCK_RATE;
2372                         for (i = RATE_6M_IDX_TBL; i <= RATE_54M_IDX_TBL; i++)
2373                                 table[i].next_rate_idx =
2374                                     il3945_rates[idx].table_rs_idx;
2375
2376                         idx = RATE_11M_IDX_TBL;
2377                         /* CCK shouldn't fall back to OFDM... */
2378                         table[idx].next_rate_idx = RATE_5M_IDX_TBL;
2379                 }
2380                 break;
2381
2382         default:
2383                 WARN_ON(1);
2384                 break;
2385         }
2386
2387         /* Update the rate scaling for control frame Tx */
2388         rate_cmd.table_id = 0;
2389         rc = il_send_cmd_pdu(il, C_RATE_SCALE, sizeof(rate_cmd), &rate_cmd);
2390         if (rc)
2391                 return rc;
2392
2393         /* Update the rate scaling for data frame Tx */
2394         rate_cmd.table_id = 1;
2395         return il_send_cmd_pdu(il, C_RATE_SCALE, sizeof(rate_cmd), &rate_cmd);
2396 }
2397
2398 /* Called when initializing driver */
2399 int
2400 il3945_hw_set_hw_params(struct il_priv *il)
2401 {
2402         memset((void *)&il->hw_params, 0, sizeof(struct il_hw_params));
2403
2404         il->_3945.shared_virt =
2405             dma_alloc_coherent(&il->pci_dev->dev, sizeof(struct il3945_shared),
2406                                &il->_3945.shared_phys, GFP_KERNEL);
2407         if (!il->_3945.shared_virt)
2408                 return -ENOMEM;
2409
2410         il->hw_params.bcast_id = IL3945_BROADCAST_ID;
2411
2412         /* Assign number of Usable TX queues */
2413         il->hw_params.max_txq_num = il->cfg->num_of_queues;
2414
2415         il->hw_params.tfd_size = sizeof(struct il3945_tfd);
2416         il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_3K);
2417         il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2418         il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2419         il->hw_params.max_stations = IL3945_STATION_COUNT;
2420
2421         il->sta_key_max_num = STA_KEY_MAX_NUM;
2422
2423         il->hw_params.rx_wrt_ptr_reg = FH39_RSCSR_CHNL0_WPTR;
2424         il->hw_params.max_beacon_itrvl = IL39_MAX_UCODE_BEACON_INTERVAL;
2425         il->hw_params.beacon_time_tsf_bits = IL3945_EXT_BEACON_TIME_POS;
2426
2427         return 0;
2428 }
2429
2430 unsigned int
2431 il3945_hw_get_beacon_cmd(struct il_priv *il, struct il3945_frame *frame,
2432                          u8 rate)
2433 {
2434         struct il3945_tx_beacon_cmd *tx_beacon_cmd;
2435         unsigned int frame_size;
2436
2437         tx_beacon_cmd = (struct il3945_tx_beacon_cmd *)&frame->u;
2438         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2439
2440         tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
2441         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2442
2443         frame_size =
2444             il3945_fill_beacon_frame(il, tx_beacon_cmd->frame,
2445                                      sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2446
2447         BUG_ON(frame_size > MAX_MPDU_SIZE);
2448         tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);
2449
2450         tx_beacon_cmd->tx.rate = rate;
2451         tx_beacon_cmd->tx.tx_flags =
2452             (TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK);
2453
2454         /* supp_rates[0] == OFDM start at IL_FIRST_OFDM_RATE */
2455         tx_beacon_cmd->tx.supp_rates[0] =
2456             (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
2457
2458         tx_beacon_cmd->tx.supp_rates[1] = (IL_CCK_BASIC_RATES_MASK & 0xF);
2459
2460         return sizeof(struct il3945_tx_beacon_cmd) + frame_size;
2461 }
2462
2463 void
2464 il3945_hw_handler_setup(struct il_priv *il)
2465 {
2466         il->handlers[C_TX] = il3945_hdl_tx;
2467         il->handlers[N_3945_RX] = il3945_hdl_rx;
2468 }
2469
2470 void
2471 il3945_hw_setup_deferred_work(struct il_priv *il)
2472 {
2473         INIT_DELAYED_WORK(&il->_3945.thermal_periodic,
2474                           il3945_bg_reg_txpower_periodic);
2475 }
2476
2477 void
2478 il3945_hw_cancel_deferred_work(struct il_priv *il)
2479 {
2480         cancel_delayed_work(&il->_3945.thermal_periodic);
2481 }
2482
2483 /* check contents of special bootstrap uCode SRAM */
2484 static int
2485 il3945_verify_bsm(struct il_priv *il)
2486 {
2487         __le32 *image = il->ucode_boot.v_addr;
2488         u32 len = il->ucode_boot.len;
2489         u32 reg;
2490         u32 val;
2491
2492         D_INFO("Begin verify bsm\n");
2493
2494         /* verify BSM SRAM contents */
2495         val = il_rd_prph(il, BSM_WR_DWCOUNT_REG);
2496         for (reg = BSM_SRAM_LOWER_BOUND; reg < BSM_SRAM_LOWER_BOUND + len;
2497              reg += sizeof(u32), image++) {
2498                 val = il_rd_prph(il, reg);
2499                 if (val != le32_to_cpu(*image)) {
2500                         IL_ERR("BSM uCode verification failed at "
2501                                "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
2502                                BSM_SRAM_LOWER_BOUND, reg - BSM_SRAM_LOWER_BOUND,
2503                                len, val, le32_to_cpu(*image));
2504                         return -EIO;
2505                 }
2506         }
2507
2508         D_INFO("BSM bootstrap uCode image OK\n");
2509
2510         return 0;
2511 }
2512
2513 /******************************************************************************
2514  *
2515  * EEPROM related functions
2516  *
2517  ******************************************************************************/
2518
2519 /*
2520  * Clear the OWNER_MSK, to establish driver (instead of uCode running on
2521  * embedded controller) as EEPROM reader; each read is a series of pulses
2522  * to/from the EEPROM chip, not a single event, so even reads could conflict
2523  * if they weren't arbitrated by some ownership mechanism.  Here, the driver
2524  * simply claims ownership, which should be safe when this function is called
2525  * (i.e. before loading uCode!).
2526  */
2527 static int
2528 il3945_eeprom_acquire_semaphore(struct il_priv *il)
2529 {
2530         _il_clear_bit(il, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK);
2531         return 0;
2532 }
2533
2534 static void
2535 il3945_eeprom_release_semaphore(struct il_priv *il)
2536 {
2537         return;
2538 }
2539
2540  /**
2541   * il3945_load_bsm - Load bootstrap instructions
2542   *
2543   * BSM operation:
2544   *
2545   * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
2546   * in special SRAM that does not power down during RFKILL.  When powering back
2547   * up after power-saving sleeps (or during initial uCode load), the BSM loads
2548   * the bootstrap program into the on-board processor, and starts it.
2549   *
2550   * The bootstrap program loads (via DMA) instructions and data for a new
2551   * program from host DRAM locations indicated by the host driver in the
2552   * BSM_DRAM_* registers.  Once the new program is loaded, it starts
2553   * automatically.
2554   *
2555   * When initializing the NIC, the host driver points the BSM to the
2556   * "initialize" uCode image.  This uCode sets up some internal data, then
2557   * notifies host via "initialize alive" that it is complete.
2558   *
2559   * The host then replaces the BSM_DRAM_* pointer values to point to the
2560   * normal runtime uCode instructions and a backup uCode data cache buffer
2561   * (filled initially with starting data values for the on-board processor),
2562   * then triggers the "initialize" uCode to load and launch the runtime uCode,
2563   * which begins normal operation.
2564   *
2565   * When doing a power-save shutdown, runtime uCode saves data SRAM into
2566   * the backup data cache in DRAM before SRAM is powered down.
2567   *
2568   * When powering back up, the BSM loads the bootstrap program.  This reloads
2569   * the runtime uCode instructions and the backup data cache into SRAM,
2570   * and re-launches the runtime uCode from where it left off.
2571   */
2572 static int
2573 il3945_load_bsm(struct il_priv *il)
2574 {
2575         __le32 *image = il->ucode_boot.v_addr;
2576         u32 len = il->ucode_boot.len;
2577         dma_addr_t pinst;
2578         dma_addr_t pdata;
2579         u32 inst_len;
2580         u32 data_len;
2581         int rc;
2582         int i;
2583         u32 done;
2584         u32 reg_offset;
2585
2586         D_INFO("Begin load bsm\n");
2587
2588         /* make sure bootstrap program is no larger than BSM's SRAM size */
2589         if (len > IL39_MAX_BSM_SIZE)
2590                 return -EINVAL;
2591
2592         /* Tell bootstrap uCode where to find the "Initialize" uCode
2593          *   in host DRAM ... host DRAM physical address bits 31:0 for 3945.
2594          * NOTE:  il3945_initialize_alive_start() will replace these values,
2595          *        after the "initialize" uCode has run, to point to
2596          *        runtime/protocol instructions and backup data cache. */
2597         pinst = il->ucode_init.p_addr;
2598         pdata = il->ucode_init_data.p_addr;
2599         inst_len = il->ucode_init.len;
2600         data_len = il->ucode_init_data.len;
2601
2602         il_wr_prph(il, BSM_DRAM_INST_PTR_REG, pinst);
2603         il_wr_prph(il, BSM_DRAM_DATA_PTR_REG, pdata);
2604         il_wr_prph(il, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
2605         il_wr_prph(il, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
2606
2607         /* Fill BSM memory with bootstrap instructions */
2608         for (reg_offset = BSM_SRAM_LOWER_BOUND;
2609              reg_offset < BSM_SRAM_LOWER_BOUND + len;
2610              reg_offset += sizeof(u32), image++)
2611                 _il_wr_prph(il, reg_offset, le32_to_cpu(*image));
2612
2613         rc = il3945_verify_bsm(il);
2614         if (rc)
2615                 return rc;
2616
2617         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
2618         il_wr_prph(il, BSM_WR_MEM_SRC_REG, 0x0);
2619         il_wr_prph(il, BSM_WR_MEM_DST_REG, IL39_RTC_INST_LOWER_BOUND);
2620         il_wr_prph(il, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
2621
2622         /* Load bootstrap code into instruction SRAM now,
2623          *   to prepare to load "initialize" uCode */
2624         il_wr_prph(il, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
2625
2626         /* Wait for load of bootstrap uCode to finish */
2627         for (i = 0; i < 100; i++) {
2628                 done = il_rd_prph(il, BSM_WR_CTRL_REG);
2629                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
2630                         break;
2631                 udelay(10);
2632         }
2633         if (i < 100)
2634                 D_INFO("BSM write complete, poll %d iterations\n", i);
2635         else {
2636                 IL_ERR("BSM write did not complete!\n");
2637                 return -EIO;
2638         }
2639
2640         /* Enable future boot loads whenever power management unit triggers it
2641          *   (e.g. when powering back up after power-save shutdown) */
2642         il_wr_prph(il, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
2643
2644         return 0;
2645 }
2646
2647 const struct il_ops il3945_ops = {
2648         .txq_attach_buf_to_tfd = il3945_hw_txq_attach_buf_to_tfd,
2649         .txq_free_tfd = il3945_hw_txq_free_tfd,
2650         .txq_init = il3945_hw_tx_queue_init,
2651         .load_ucode = il3945_load_bsm,
2652         .dump_nic_error_log = il3945_dump_nic_error_log,
2653         .apm_init = il3945_apm_init,
2654         .send_tx_power = il3945_send_tx_power,
2655         .is_valid_rtc_data_addr = il3945_hw_valid_rtc_data_addr,
2656         .eeprom_acquire_semaphore = il3945_eeprom_acquire_semaphore,
2657         .eeprom_release_semaphore = il3945_eeprom_release_semaphore,
2658
2659         .rxon_assoc = il3945_send_rxon_assoc,
2660         .commit_rxon = il3945_commit_rxon,
2661
2662         .get_hcmd_size = il3945_get_hcmd_size,
2663         .build_addsta_hcmd = il3945_build_addsta_hcmd,
2664         .request_scan = il3945_request_scan,
2665         .post_scan = il3945_post_scan,
2666
2667         .post_associate = il3945_post_associate,
2668         .config_ap = il3945_config_ap,
2669         .manage_ibss_station = il3945_manage_ibss_station,
2670
2671         .send_led_cmd = il3945_send_led_cmd,
2672 };
2673
2674 static struct il_cfg il3945_bg_cfg = {
2675         .name = "3945BG",
2676         .fw_name_pre = IL3945_FW_PRE,
2677         .ucode_api_max = IL3945_UCODE_API_MAX,
2678         .ucode_api_min = IL3945_UCODE_API_MIN,
2679         .sku = IL_SKU_G,
2680         .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
2681         .mod_params = &il3945_mod_params,
2682         .led_mode = IL_LED_BLINK,
2683
2684         .eeprom_size = IL3945_EEPROM_IMG_SIZE,
2685         .num_of_queues = IL39_NUM_QUEUES,
2686         .pll_cfg_val = CSR39_ANA_PLL_CFG_VAL,
2687         .set_l0s = false,
2688         .use_bsm = true,
2689         .led_compensation = 64,
2690         .wd_timeout = IL_DEF_WD_TIMEOUT,
2691
2692         .regulatory_bands = {
2693                 EEPROM_REGULATORY_BAND_1_CHANNELS,
2694                 EEPROM_REGULATORY_BAND_2_CHANNELS,
2695                 EEPROM_REGULATORY_BAND_3_CHANNELS,
2696                 EEPROM_REGULATORY_BAND_4_CHANNELS,
2697                 EEPROM_REGULATORY_BAND_5_CHANNELS,
2698                 EEPROM_REGULATORY_BAND_NO_HT40,
2699                 EEPROM_REGULATORY_BAND_NO_HT40,
2700         },
2701 };
2702
2703 static struct il_cfg il3945_abg_cfg = {
2704         .name = "3945ABG",
2705         .fw_name_pre = IL3945_FW_PRE,
2706         .ucode_api_max = IL3945_UCODE_API_MAX,
2707         .ucode_api_min = IL3945_UCODE_API_MIN,
2708         .sku = IL_SKU_A | IL_SKU_G,
2709         .eeprom_ver = EEPROM_3945_EEPROM_VERSION,
2710         .mod_params = &il3945_mod_params,
2711         .led_mode = IL_LED_BLINK,
2712
2713         .eeprom_size = IL3945_EEPROM_IMG_SIZE,
2714         .num_of_queues = IL39_NUM_QUEUES,
2715         .pll_cfg_val = CSR39_ANA_PLL_CFG_VAL,
2716         .set_l0s = false,
2717         .use_bsm = true,
2718         .led_compensation = 64,
2719         .wd_timeout = IL_DEF_WD_TIMEOUT,
2720
2721         .regulatory_bands = {
2722                 EEPROM_REGULATORY_BAND_1_CHANNELS,
2723                 EEPROM_REGULATORY_BAND_2_CHANNELS,
2724                 EEPROM_REGULATORY_BAND_3_CHANNELS,
2725                 EEPROM_REGULATORY_BAND_4_CHANNELS,
2726                 EEPROM_REGULATORY_BAND_5_CHANNELS,
2727                 EEPROM_REGULATORY_BAND_NO_HT40,
2728                 EEPROM_REGULATORY_BAND_NO_HT40,
2729         },
2730 };
2731
2732 const struct pci_device_id il3945_hw_card_ids[] = {
2733         {IL_PCI_DEVICE(0x4222, 0x1005, il3945_bg_cfg)},
2734         {IL_PCI_DEVICE(0x4222, 0x1034, il3945_bg_cfg)},
2735         {IL_PCI_DEVICE(0x4222, 0x1044, il3945_bg_cfg)},
2736         {IL_PCI_DEVICE(0x4227, 0x1014, il3945_bg_cfg)},
2737         {IL_PCI_DEVICE(0x4222, PCI_ANY_ID, il3945_abg_cfg)},
2738         {IL_PCI_DEVICE(0x4227, PCI_ANY_ID, il3945_abg_cfg)},
2739         {0}
2740 };
2741
2742 MODULE_DEVICE_TABLE(pci, il3945_hw_card_ids);