git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/p54/p54common.c

   1 /*
   2  * Common code for mac80211 Prism54 drivers
   3  *
   4  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   5  * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
   6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * Based on:
   9  * - the islsm (softmac prism54) driver, which is:
  10  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  11  * - stlc45xx driver
  12  * C\ 2  Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/firmware.h>
  21 #include <linux/etherdevice.h>
  22
  23 #include <net/mac80211.h>
  24
  25 #include "p54.h"
  26 #include "p54common.h"
  27
  28 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  29 MODULE_DESCRIPTION("Softmac Prism54 common code");
  30 MODULE_LICENSE("GPL");
  31 MODULE_ALIAS("prism54common");
  32
  33 static struct ieee80211_rate p54_bgrates[] = {
  34         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  35         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  36         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  37         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  38         { .bitrate = 60, .hw_value = 4, },
  39         { .bitrate = 90, .hw_value = 5, },
  40         { .bitrate = 120, .hw_value = 6, },
  41         { .bitrate = 180, .hw_value = 7, },
  42         { .bitrate = 240, .hw_value = 8, },
  43         { .bitrate = 360, .hw_value = 9, },
  44         { .bitrate = 480, .hw_value = 10, },
  45         { .bitrate = 540, .hw_value = 11, },
  46 };
  47
  48 static struct ieee80211_channel p54_bgchannels[] = {
  49         { .center_freq = 2412, .hw_value = 1, },
  50         { .center_freq = 2417, .hw_value = 2, },
  51         { .center_freq = 2422, .hw_value = 3, },
  52         { .center_freq = 2427, .hw_value = 4, },
  53         { .center_freq = 2432, .hw_value = 5, },
  54         { .center_freq = 2437, .hw_value = 6, },
  55         { .center_freq = 2442, .hw_value = 7, },
  56         { .center_freq = 2447, .hw_value = 8, },
  57         { .center_freq = 2452, .hw_value = 9, },
  58         { .center_freq = 2457, .hw_value = 10, },
  59         { .center_freq = 2462, .hw_value = 11, },
  60         { .center_freq = 2467, .hw_value = 12, },
  61         { .center_freq = 2472, .hw_value = 13, },
  62         { .center_freq = 2484, .hw_value = 14, },
  63 };
  64
  65 static struct ieee80211_supported_band band_2GHz = {
  66         .channels = p54_bgchannels,
  67         .n_channels = ARRAY_SIZE(p54_bgchannels),
  68         .bitrates = p54_bgrates,
  69         .n_bitrates = ARRAY_SIZE(p54_bgrates),
  70 };
  71
  72 static struct ieee80211_rate p54_arates[] = {
  73         { .bitrate = 60, .hw_value = 4, },
  74         { .bitrate = 90, .hw_value = 5, },
  75         { .bitrate = 120, .hw_value = 6, },
  76         { .bitrate = 180, .hw_value = 7, },
  77         { .bitrate = 240, .hw_value = 8, },
  78         { .bitrate = 360, .hw_value = 9, },
  79         { .bitrate = 480, .hw_value = 10, },
  80         { .bitrate = 540, .hw_value = 11, },
  81 };
  82
  83 static struct ieee80211_channel p54_achannels[] = {
  84         { .center_freq = 4920 },
  85         { .center_freq = 4940 },
  86         { .center_freq = 4960 },
  87         { .center_freq = 4980 },
  88         { .center_freq = 5040 },
  89         { .center_freq = 5060 },
  90         { .center_freq = 5080 },
  91         { .center_freq = 5170 },
  92         { .center_freq = 5180 },
  93         { .center_freq = 5190 },
  94         { .center_freq = 5200 },
  95         { .center_freq = 5210 },
  96         { .center_freq = 5220 },
  97         { .center_freq = 5230 },
  98         { .center_freq = 5240 },
  99         { .center_freq = 5260 },
 100         { .center_freq = 5280 },
 101         { .center_freq = 5300 },
 102         { .center_freq = 5320 },
 103         { .center_freq = 5500 },
 104         { .center_freq = 5520 },
 105         { .center_freq = 5540 },
 106         { .center_freq = 5560 },
 107         { .center_freq = 5580 },
 108         { .center_freq = 5600 },
 109         { .center_freq = 5620 },
 110         { .center_freq = 5640 },
 111         { .center_freq = 5660 },
 112         { .center_freq = 5680 },
 113         { .center_freq = 5700 },
 114         { .center_freq = 5745 },
 115         { .center_freq = 5765 },
 116         { .center_freq = 5785 },
 117         { .center_freq = 5805 },
 118         { .center_freq = 5825 },
 119 };
 120
 121 static struct ieee80211_supported_band band_5GHz = {
 122         .channels = p54_achannels,
 123         .n_channels = ARRAY_SIZE(p54_achannels),
 124         .bitrates = p54_arates,
 125         .n_bitrates = ARRAY_SIZE(p54_arates),
 126 };
 127
 128 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
 129 {
 130         struct p54_common *priv = dev->priv;
 131         struct bootrec_exp_if *exp_if;
 132         struct bootrec *bootrec;
 133         u32 *data = (u32 *)fw->data;
 134         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
 135         u8 *fw_version = NULL;
 136         size_t len;
 137         int i;
 138
 139         if (priv->rx_start)
 140                 return 0;
 141
 142         while (data < end_data && *data)
 143                 data++;
 144
 145         while (data < end_data && !*data)
 146                 data++;
 147
 148         bootrec = (struct bootrec *) data;
 149
 150         while (bootrec->data <= end_data &&
 151                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
 152                 u32 code = le32_to_cpu(bootrec->code);
 153                 switch (code) {
 154                 case BR_CODE_COMPONENT_ID:
 155                         priv->fw_interface = be32_to_cpup((__be32 *)
 156                                              bootrec->data);
 157                         switch (priv->fw_interface) {
 158                         case FW_FMAC:
 159                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
 160                                 break;
 161                         case FW_LM20:
 162                                 printk(KERN_INFO "p54: LM20 firmware\n");
 163                                 break;
 164                         case FW_LM86:
 165                                 printk(KERN_INFO "p54: LM86 firmware\n");
 166                                 break;
 167                         case FW_LM87:
 168                                 printk(KERN_INFO "p54: LM87 firmware\n");
 169                                 break;
 170                         default:
 171                                 printk(KERN_INFO "p54: unknown firmware\n");
 172                                 break;
 173                         }
 174                         break;
 175                 case BR_CODE_COMPONENT_VERSION:
 176                         /* 24 bytes should be enough for all firmwares */
 177                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
 178                                 fw_version = (unsigned char*)bootrec->data;
 179                         break;
 180                 case BR_CODE_DESCR: {
 181                         struct bootrec_desc *desc =
 182                                 (struct bootrec_desc *)bootrec->data;
 183                         priv->rx_start = le32_to_cpu(desc->rx_start);
 184                         /* FIXME add sanity checking */
 185                         priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
 186                         priv->headroom = desc->headroom;
 187                         priv->tailroom = desc->tailroom;
 188                         if (le32_to_cpu(bootrec->len) == 11)
 189                                 priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
 190                         else
 191                                 priv->rx_mtu = (size_t)
 192                                         0x620 - priv->tx_hdr_len;
 193                         break;
 194                         }
 195                 case BR_CODE_EXPOSED_IF:
 196                         exp_if = (struct bootrec_exp_if *) bootrec->data;
 197                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
 198                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
 199                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
 200                         break;
 201                 case BR_CODE_DEPENDENT_IF:
 202                         break;
 203                 case BR_CODE_END_OF_BRA:
 204                 case LEGACY_BR_CODE_END_OF_BRA:
 205                         end_data = NULL;
 206                         break;
 207                 default:
 208                         break;
 209                 }
 210                 bootrec = (struct bootrec *)&bootrec->data[len];
 211         }
 212
 213         if (fw_version)
 214                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
 215                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
 216
 217         if (priv->fw_var < 0x500)
 218                 printk(KERN_INFO "p54: you are using an obsolete firmware. "
 219                        "visit http://wireless.kernel.org/en/users/Drivers/p54 "
 220                        "and grab one for \"kernel >= 2.6.28\"!\n");
 221
 222         if (priv->fw_var >= 0x300) {
 223                 /* Firmware supports QoS, use it! */
 224                 priv->tx_stats[4].limit = 3;            /* AC_VO */
 225                 priv->tx_stats[5].limit = 4;            /* AC_VI */
 226                 priv->tx_stats[6].limit = 3;            /* AC_BE */
 227                 priv->tx_stats[7].limit = 2;            /* AC_BK */
 228                 dev->queues = 4;
 229         }
 230
 231         return 0;
 232 }
 233 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 234
 235 static int p54_convert_rev0(struct ieee80211_hw *dev,
 236                             struct pda_pa_curve_data *curve_data)
 237 {
 238         struct p54_common *priv = dev->priv;
 239         struct p54_pa_curve_data_sample *dst;
 240         struct pda_pa_curve_data_sample_rev0 *src;
 241         size_t cd_len = sizeof(*curve_data) +
 242                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 243                  curve_data->channels;
 244         unsigned int i, j;
 245         void *source, *target;
 246
 247         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 248         if (!priv->curve_data)
 249                 return -ENOMEM;
 250
 251         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 252         source = curve_data->data;
 253         target = priv->curve_data->data;
 254         for (i = 0; i < curve_data->channels; i++) {
 255                 __le16 *freq = source;
 256                 source += sizeof(__le16);
 257                 *((__le16 *)target) = *freq;
 258                 target += sizeof(__le16);
 259                 for (j = 0; j < curve_data->points_per_channel; j++) {
 260                         dst = target;
 261                         src = source;
 262
 263                         dst->rf_power = src->rf_power;
 264                         dst->pa_detector = src->pa_detector;
 265                         dst->data_64qam = src->pcv;
 266                         /* "invent" the points for the other modulations */
 267 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 268                         dst->data_16qam = SUB(src->pcv, 12);
 269                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 270                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 271                         dst->data_barker = SUB(dst->data_bpsk, 14);
 272 #undef SUB
 273                         target += sizeof(*dst);
 274                         source += sizeof(*src);
 275                 }
 276         }
 277
 278         return 0;
 279 }
 280
 281 static int p54_convert_rev1(struct ieee80211_hw *dev,
 282                             struct pda_pa_curve_data *curve_data)
 283 {
 284         struct p54_common *priv = dev->priv;
 285         struct p54_pa_curve_data_sample *dst;
 286         struct pda_pa_curve_data_sample_rev1 *src;
 287         size_t cd_len = sizeof(*curve_data) +
 288                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 289                  curve_data->channels;
 290         unsigned int i, j;
 291         void *source, *target;
 292
 293         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 294         if (!priv->curve_data)
 295                 return -ENOMEM;
 296
 297         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 298         source = curve_data->data;
 299         target = priv->curve_data->data;
 300         for (i = 0; i < curve_data->channels; i++) {
 301                 __le16 *freq = source;
 302                 source += sizeof(__le16);
 303                 *((__le16 *)target) = *freq;
 304                 target += sizeof(__le16);
 305                 for (j = 0; j < curve_data->points_per_channel; j++) {
 306                         memcpy(target, source, sizeof(*src));
 307
 308                         target += sizeof(*dst);
 309                         source += sizeof(*src);
 310                 }
 311                 source++;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
 318                               "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
 319 static int p54_init_xbow_synth(struct ieee80211_hw *dev);
 320
 321 static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 322 {
 323         struct p54_common *priv = dev->priv;
 324         struct eeprom_pda_wrap *wrap = NULL;
 325         struct pda_entry *entry;
 326         unsigned int data_len, entry_len;
 327         void *tmp;
 328         int err;
 329         u8 *end = (u8 *)eeprom + len;
 330         u16 synth = 0;
 331
 332         wrap = (struct eeprom_pda_wrap *) eeprom;
 333         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 334
 335         /* verify that at least the entry length/code fits */
 336         while ((u8 *)entry <= end - sizeof(*entry)) {
 337                 entry_len = le16_to_cpu(entry->len);
 338                 data_len = ((entry_len - 1) << 1);
 339
 340                 /* abort if entry exceeds whole structure */
 341                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 342                         break;
 343
 344                 switch (le16_to_cpu(entry->code)) {
 345                 case PDR_MAC_ADDRESS:
 346                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 347                         break;
 348                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 349                         if (data_len < 2) {
 350                                 err = -EINVAL;
 351                                 goto err;
 352                         }
 353
 354                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 355                                 err = -EINVAL;
 356                                 goto err;
 357                         }
 358
 359                         priv->output_limit = kmalloc(entry->data[1] *
 360                                 sizeof(*priv->output_limit), GFP_KERNEL);
 361
 362                         if (!priv->output_limit) {
 363                                 err = -ENOMEM;
 364                                 goto err;
 365                         }
 366
 367                         memcpy(priv->output_limit, &entry->data[2],
 368                                entry->data[1]*sizeof(*priv->output_limit));
 369                         priv->output_limit_len = entry->data[1];
 370                         break;
 371                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 372                         struct pda_pa_curve_data *curve_data =
 373                                 (struct pda_pa_curve_data *)entry->data;
 374                         if (data_len < sizeof(*curve_data)) {
 375                                 err = -EINVAL;
 376                                 goto err;
 377                         }
 378
 379                         switch (curve_data->cal_method_rev) {
 380                         case 0:
 381                                 err = p54_convert_rev0(dev, curve_data);
 382                                 break;
 383                         case 1:
 384                                 err = p54_convert_rev1(dev, curve_data);
 385                                 break;
 386                         default:
 387                                 printk(KERN_ERR "p54: unknown curve data "
 388                                                 "revision %d\n",
 389                                                 curve_data->cal_method_rev);
 390                                 err = -ENODEV;
 391                                 break;
 392                         }
 393                         if (err)
 394                                 goto err;
 395
 396                 }
 397                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 398                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 399                         if (!priv->iq_autocal) {
 400                                 err = -ENOMEM;
 401                                 goto err;
 402                         }
 403
 404                         memcpy(priv->iq_autocal, entry->data, data_len);
 405                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 406                         break;
 407                 case PDR_INTERFACE_LIST:
 408                         tmp = entry->data;
 409                         while ((u8 *)tmp < entry->data + data_len) {
 410                                 struct bootrec_exp_if *exp_if = tmp;
 411                                 if (le16_to_cpu(exp_if->if_id) == 0xf)
 412                                         synth = le16_to_cpu(exp_if->variant);
 413                                 tmp += sizeof(struct bootrec_exp_if);
 414                         }
 415                         break;
 416                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 417                         priv->version = *(u8 *)(entry->data + 1);
 418                         break;
 419                 case PDR_END:
 420                         /* make it overrun */
 421                         entry_len = len;
 422                         break;
 423                 default:
 424                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
 425                                 le16_to_cpu(entry->code));
 426                         break;
 427                 }
 428
 429                 entry = (void *)entry + (entry_len + 1)*2;
 430         }
 431
 432         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 433             !priv->curve_data) {
 434                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 435                 err = -EINVAL;
 436                 goto err;
 437         }
 438
 439         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 440         if (priv->rxhw == 4)
 441                 p54_init_xbow_synth(dev);
 442         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 443                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 444         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 445                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
 446
 447         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 448                 u8 perm_addr[ETH_ALEN];
 449
 450                 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
 451                         wiphy_name(dev->wiphy));
 452                 random_ether_addr(perm_addr);
 453                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 454         }
 455
 456         printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
 457                 wiphy_name(dev->wiphy),
 458                 dev->wiphy->perm_addr,
 459                 priv->version, p54_rf_chips[priv->rxhw]);
 460
 461         return 0;
 462
 463   err:
 464         if (priv->iq_autocal) {
 465                 kfree(priv->iq_autocal);
 466                 priv->iq_autocal = NULL;
 467         }
 468
 469         if (priv->output_limit) {
 470                 kfree(priv->output_limit);
 471                 priv->output_limit = NULL;
 472         }
 473
 474         if (priv->curve_data) {
 475                 kfree(priv->curve_data);
 476                 priv->curve_data = NULL;
 477         }
 478
 479         printk(KERN_ERR "p54: eeprom parse failed!\n");
 480         return err;
 481 }
 482
 483 static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
 484 {
 485         /* TODO: get the rssi_add & rssi_mul data from the eeprom */
 486         return ((rssi * 0x83) / 64 - 400) / 4;
 487 }
 488
 489 static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 490 {
 491         struct p54_common *priv = dev->priv;
 492         struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
 493         struct ieee80211_rx_status rx_status = {0};
 494         u16 freq = le16_to_cpu(hdr->freq);
 495         size_t header_len = sizeof(*hdr);
 496         u32 tsf32;
 497
 498         if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
 499                 if (priv->filter_flags & FIF_FCSFAIL)
 500                         rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 501                 else
 502                         return 0;
 503         }
 504
 505         rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
 506         rx_status.noise = priv->noise;
 507         /* XX correct? */
 508         rx_status.qual = (100 * hdr->rssi) / 127;
 509         rx_status.rate_idx = (dev->conf.channel->band == IEEE80211_BAND_2GHZ ?
 510                         hdr->rate : (hdr->rate - 4)) & 0xf;
 511         rx_status.freq = freq;
 512         rx_status.band =  dev->conf.channel->band;
 513         rx_status.antenna = hdr->antenna;
 514
 515         tsf32 = le32_to_cpu(hdr->tsf32);
 516         if (tsf32 < priv->tsf_low32)
 517                 priv->tsf_high32++;
 518         rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
 519         priv->tsf_low32 = tsf32;
 520
 521         rx_status.flag |= RX_FLAG_TSFT;
 522
 523         if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 524                 header_len += hdr->align[0];
 525
 526         skb_pull(skb, header_len);
 527         skb_trim(skb, le16_to_cpu(hdr->len));
 528
 529         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 530
 531         return -1;
 532 }
 533
 534 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 535 {
 536         struct p54_common *priv = dev->priv;
 537         int i;
 538
 539         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
 540                 return ;
 541
 542         for (i = 0; i < dev->queues; i++)
 543                 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
 544                         ieee80211_wake_queue(dev, i);
 545 }
 546
 547 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
 548 {
 549         struct p54_common *priv = dev->priv;
 550         struct ieee80211_tx_info *info;
 551         struct memrecord *range;
 552         unsigned long flags;
 553         u32 freed = 0, last_addr = priv->rx_start;
 554
 555         if (!skb || !dev)
 556                 return;
 557
 558         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 559         info = IEEE80211_SKB_CB(skb);
 560         range = (void *)info->rate_driver_data;
 561         if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
 562                 struct ieee80211_tx_info *ni;
 563                 struct memrecord *mr;
 564
 565                 ni = IEEE80211_SKB_CB(skb->prev);
 566                 mr = (struct memrecord *)ni->rate_driver_data;
 567                 last_addr = mr->end_addr;
 568         }
 569         if (skb->next != (struct sk_buff *)&priv->tx_queue) {
 570                 struct ieee80211_tx_info *ni;
 571                 struct memrecord *mr;
 572
 573                 ni = IEEE80211_SKB_CB(skb->next);
 574                 mr = (struct memrecord *)ni->rate_driver_data;
 575                 freed = mr->start_addr - last_addr;
 576         } else
 577                 freed = priv->rx_end - last_addr;
 578         __skb_unlink(skb, &priv->tx_queue);
 579         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 580         kfree_skb(skb);
 581
 582         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 583                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 584                 p54_wake_free_queues(dev);
 585 }
 586 EXPORT_SYMBOL_GPL(p54_free_skb);
 587
 588 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 589 {
 590         struct p54_common *priv = dev->priv;
 591         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 592         struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
 593         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 594         u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
 595         struct memrecord *range = NULL;
 596         u32 freed = 0;
 597         u32 last_addr = priv->rx_start;
 598         unsigned long flags;
 599         int count, idx;
 600
 601         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 602         while (entry != (struct sk_buff *)&priv->tx_queue) {
 603                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 604                 struct p54_hdr *entry_hdr;
 605                 struct p54_tx_data *entry_data;
 606                 int pad = 0;
 607
 608                 range = (void *)info->rate_driver_data;
 609                 if (range->start_addr != addr) {
 610                         last_addr = range->end_addr;
 611                         entry = entry->next;
 612                         continue;
 613                 }
 614
 615                 if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 616                         struct ieee80211_tx_info *ni;
 617                         struct memrecord *mr;
 618
 619                         ni = IEEE80211_SKB_CB(entry->next);
 620                         mr = (struct memrecord *)ni->rate_driver_data;
 621                         freed = mr->start_addr - last_addr;
 622                 } else
 623                         freed = priv->rx_end - last_addr;
 624
 625                 last_addr = range->end_addr;
 626                 __skb_unlink(entry, &priv->tx_queue);
 627                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 628
 629                 if (unlikely(entry == priv->cached_beacon)) {
 630                         kfree_skb(entry);
 631                         priv->cached_beacon = NULL;
 632                         goto out;
 633                 }
 634
 635                 /*
 636                  * Clear manually, ieee80211_tx_info_clear_status would
 637                  * clear the counts too and we need them.
 638                  */
 639                 memset(&info->status.ampdu_ack_len, 0,
 640                        sizeof(struct ieee80211_tx_info) -
 641                        offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
 642                 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
 643                                       status.ampdu_ack_len) != 23);
 644
 645                 entry_hdr = (struct p54_hdr *) entry->data;
 646                 entry_data = (struct p54_tx_data *) entry_hdr->data;
 647                 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 648                         pad = entry_data->align[0];
 649
 650                 /* walk through the rates array and adjust the counts */
 651                 count = payload->tries;
 652                 for (idx = 0; idx < 4; idx++) {
 653                         if (count >= info->status.rates[idx].count) {
 654                                 count -= info->status.rates[idx].count;
 655                         } else if (count > 0) {
 656                                 info->status.rates[idx].count = count;
 657                                 count = 0;
 658                         } else {
 659                                 info->status.rates[idx].idx = -1;
 660                                 info->status.rates[idx].count = 0;
 661                         }
 662                 }
 663
 664                 priv->tx_stats[entry_data->hw_queue].len--;
 665                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
 666                      (!payload->status))
 667                         info->flags |= IEEE80211_TX_STAT_ACK;
 668                 if (payload->status & P54_TX_PSM_CANCELLED)
 669                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
 670                 info->status.ack_signal = p54_rssi_to_dbm(dev,
 671                                 (int)payload->ack_rssi);
 672                 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 673                 ieee80211_tx_status_irqsafe(dev, entry);
 674                 goto out;
 675         }
 676         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 677
 678 out:
 679         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 680                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 681                 p54_wake_free_queues(dev);
 682 }
 683
 684 static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
 685                                    struct sk_buff *skb)
 686 {
 687         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 688         struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
 689         struct p54_common *priv = dev->priv;
 690
 691         if (!priv->eeprom)
 692                 return ;
 693
 694         memcpy(priv->eeprom, eeprom->data, le16_to_cpu(eeprom->len));
 695
 696         complete(&priv->eeprom_comp);
 697 }
 698
 699 static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
 700 {
 701         struct p54_common *priv = dev->priv;
 702         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 703         struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
 704         u32 tsf32 = le32_to_cpu(stats->tsf32);
 705
 706         if (tsf32 < priv->tsf_low32)
 707                 priv->tsf_high32++;
 708         priv->tsf_low32 = tsf32;
 709
 710         priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
 711         priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
 712         priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
 713
 714         priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
 715         complete(&priv->stats_comp);
 716
 717         mod_timer(&priv->stats_timer, jiffies + 5 * HZ);
 718 }
 719
 720 static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb)
 721 {
 722         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 723         struct p54_trap *trap = (struct p54_trap *) hdr->data;
 724         u16 event = le16_to_cpu(trap->event);
 725         u16 freq = le16_to_cpu(trap->frequency);
 726
 727         switch (event) {
 728         case P54_TRAP_BEACON_TX:
 729                 break;
 730         case P54_TRAP_RADAR:
 731                 printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
 732                         wiphy_name(dev->wiphy), freq);
 733                 break;
 734         case P54_TRAP_NO_BEACON:
 735                 break;
 736         case P54_TRAP_SCAN:
 737                 break;
 738         case P54_TRAP_TBTT:
 739                 break;
 740         case P54_TRAP_TIMER:
 741                 break;
 742         default:
 743                 printk(KERN_INFO "%s: received event:%x freq:%d\n",
 744                        wiphy_name(dev->wiphy), event, freq);
 745                 break;
 746         }
 747 }
 748
 749 static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 750 {
 751         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 752
 753         switch (le16_to_cpu(hdr->type)) {
 754         case P54_CONTROL_TYPE_TXDONE:
 755                 p54_rx_frame_sent(dev, skb);
 756                 break;
 757         case P54_CONTROL_TYPE_TRAP:
 758                 p54_rx_trap(dev, skb);
 759                 break;
 760         case P54_CONTROL_TYPE_BBP:
 761                 break;
 762         case P54_CONTROL_TYPE_STAT_READBACK:
 763                 p54_rx_stats(dev, skb);
 764                 break;
 765         case P54_CONTROL_TYPE_EEPROM_READBACK:
 766                 p54_rx_eeprom_readback(dev, skb);
 767                 break;
 768         default:
 769                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 770                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 771                 break;
 772         }
 773
 774         return 0;
 775 }
 776
 777 /* returns zero if skb can be reused */
 778 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 779 {
 780         u16 type = le16_to_cpu(*((__le16 *)skb->data));
 781
 782         if (type & P54_HDR_FLAG_CONTROL)
 783                 return p54_rx_control(dev, skb);
 784         else
 785                 return p54_rx_data(dev, skb);
 786 }
 787 EXPORT_SYMBOL_GPL(p54_rx);
 788
 789 /*
 790  * So, the firmware is somewhat stupid and doesn't know what places in its
 791  * memory incoming data should go to. By poking around in the firmware, we
 792  * can find some unused memory to upload our packets to. However, data that we
 793  * want the card to TX needs to stay intact until the card has told us that
 794  * it is done with it. This function finds empty places we can upload to and
 795  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 796  * allocated areas.
 797  */
 798 static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 799                                struct p54_hdr *data, u32 len)
 800 {
 801         struct p54_common *priv = dev->priv;
 802         struct sk_buff *entry = priv->tx_queue.next;
 803         struct sk_buff *target_skb = NULL;
 804         struct ieee80211_tx_info *info;
 805         struct memrecord *range;
 806         u32 last_addr = priv->rx_start;
 807         u32 largest_hole = 0;
 808         u32 target_addr = priv->rx_start;
 809         unsigned long flags;
 810         unsigned int left;
 811         len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
 812
 813         if (!skb)
 814                 return -EINVAL;
 815
 816         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 817         left = skb_queue_len(&priv->tx_queue);
 818         while (left--) {
 819                 u32 hole_size;
 820                 info = IEEE80211_SKB_CB(entry);
 821                 range = (void *)info->rate_driver_data;
 822                 hole_size = range->start_addr - last_addr;
 823                 if (!target_skb && hole_size >= len) {
 824                         target_skb = entry->prev;
 825                         hole_size -= len;
 826                         target_addr = last_addr;
 827                 }
 828                 largest_hole = max(largest_hole, hole_size);
 829                 last_addr = range->end_addr;
 830                 entry = entry->next;
 831         }
 832         if (!target_skb && priv->rx_end - last_addr >= len) {
 833                 target_skb = priv->tx_queue.prev;
 834                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 835                 if (!skb_queue_empty(&priv->tx_queue)) {
 836                         info = IEEE80211_SKB_CB(target_skb);
 837                         range = (void *)info->rate_driver_data;
 838                         target_addr = range->end_addr;
 839                 }
 840         } else
 841                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 842
 843         if (!target_skb) {
 844                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 845                 ieee80211_stop_queues(dev);
 846                 return -ENOMEM;
 847         }
 848
 849         info = IEEE80211_SKB_CB(skb);
 850         range = (void *)info->rate_driver_data;
 851         range->start_addr = target_addr;
 852         range->end_addr = target_addr + len;
 853         __skb_queue_after(&priv->tx_queue, target_skb, skb);
 854         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 855
 856         if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
 857                            48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 858                 ieee80211_stop_queues(dev);
 859
 860         data->req_id = cpu_to_le32(target_addr + priv->headroom);
 861         return 0;
 862 }
 863
 864 static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
 865                 u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
 866 {
 867         struct p54_common *priv = dev->priv;
 868         struct p54_hdr *hdr;
 869         struct sk_buff *skb;
 870
 871         skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
 872         if (!skb)
 873                 return NULL;
 874         skb_reserve(skb, priv->tx_hdr_len);
 875
 876         hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
 877         hdr->flags = cpu_to_le16(hdr_flags);
 878         hdr->len = cpu_to_le16(len - sizeof(*hdr));
 879         hdr->type = cpu_to_le16(type);
 880         hdr->tries = hdr->rts_tries = 0;
 881
 882         if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
 883                 kfree_skb(skb);
 884                 return NULL;
 885         }
 886         return skb;
 887 }
 888
 889 int p54_read_eeprom(struct ieee80211_hw *dev)
 890 {
 891         struct p54_common *priv = dev->priv;
 892         struct p54_hdr *hdr = NULL;
 893         struct p54_eeprom_lm86 *eeprom_hdr;
 894         struct sk_buff *skb;
 895         size_t eeprom_size = 0x2020, offset = 0, blocksize;
 896         int ret = -ENOMEM;
 897         void *eeprom = NULL;
 898
 899         skb = p54_alloc_skb(dev, 0x8000, sizeof(*hdr) + sizeof(*eeprom_hdr) +
 900                             EEPROM_READBACK_LEN,
 901                             P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
 902         if (!skb)
 903                 goto free;
 904         priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
 905         if (!priv->eeprom)
 906                 goto free;
 907         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 908         if (!eeprom)
 909                 goto free;
 910
 911         eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
 912                      sizeof(*eeprom_hdr) + EEPROM_READBACK_LEN);
 913
 914         while (eeprom_size) {
 915                 blocksize = min(eeprom_size, (size_t)EEPROM_READBACK_LEN);
 916                 eeprom_hdr->offset = cpu_to_le16(offset);
 917                 eeprom_hdr->len = cpu_to_le16(blocksize);
 918                 priv->tx(dev, skb, 0);
 919
 920                 if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
 921                         printk(KERN_ERR "%s: device does not respond!\n",
 922                                 wiphy_name(dev->wiphy));
 923                         ret = -EBUSY;
 924                         goto free;
 925                 }
 926
 927                 memcpy(eeprom + offset, priv->eeprom, blocksize);
 928                 offset += blocksize;
 929                 eeprom_size -= blocksize;
 930         }
 931
 932         ret = p54_parse_eeprom(dev, eeprom, offset);
 933 free:
 934         kfree(priv->eeprom);
 935         priv->eeprom = NULL;
 936         p54_free_skb(dev, skb);
 937         kfree(eeprom);
 938
 939         return ret;
 940 }
 941 EXPORT_SYMBOL_GPL(p54_read_eeprom);
 942
 943 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
 944                 bool set)
 945 {
 946         struct p54_common *priv = dev->priv;
 947         struct sk_buff *skb;
 948         struct p54_tim *tim;
 949
 950         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
 951                       sizeof(struct p54_hdr) + sizeof(*tim),
 952                       P54_CONTROL_TYPE_TIM, GFP_KERNEL);
 953         if (!skb)
 954                 return -ENOMEM;
 955
 956         tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
 957         tim->count = 1;
 958         tim->entry[0] = cpu_to_le16(set ? (sta->aid | 0x8000) : sta->aid);
 959         priv->tx(dev, skb, 1);
 960         return 0;
 961 }
 962
 963 static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr)
 964 {
 965         struct p54_common *priv = dev->priv;
 966         struct sk_buff *skb;
 967         struct p54_sta_unlock *sta;
 968
 969         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
 970                 sizeof(struct p54_hdr) + sizeof(*sta),
 971                 P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
 972         if (!skb)
 973                 return -ENOMEM;
 974
 975         sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
 976         memcpy(sta->addr, addr, ETH_ALEN);
 977         priv->tx(dev, skb, 1);
 978         return 0;
 979 }
 980
 981 static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry)
 982 {
 983         struct p54_common *priv = dev->priv;
 984         struct sk_buff *skb;
 985         struct p54_hdr *hdr;
 986         struct p54_txcancel *cancel;
 987
 988         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
 989                 sizeof(struct p54_hdr) + sizeof(*cancel),
 990                 P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
 991         if (!skb)
 992                 return -ENOMEM;
 993
 994         hdr = (void *)entry->data;
 995         cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
 996         cancel->req_id = hdr->req_id;
 997         priv->tx(dev, skb, 1);
 998         return 0;
 999 }
1000
1001 static int p54_tx_fill(struct ieee80211_hw *dev, struct sk_buff *skb,
1002                 struct ieee80211_tx_info *info, u8 *queue, size_t *extra_len,
1003                 u16 *flags, u16 *aid)
1004 {
1005         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1006         struct p54_common *priv = dev->priv;
1007         int ret = 0;
1008
1009         if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
1010                 if (ieee80211_is_beacon(hdr->frame_control)) {
1011                         *aid = 0;
1012                         *queue = 0;
1013                         *extra_len = IEEE80211_MAX_TIM_LEN;
1014                         *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
1015                         return 0;
1016                 } else if (ieee80211_is_probe_resp(hdr->frame_control)) {
1017                         *aid = 0;
1018                         *queue = 2;
1019                         *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
1020                                  P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1021                         return 0;
1022                 } else {
1023                         *queue = 2;
1024                         ret = 0;
1025                 }
1026         } else {
1027                 *queue += 4;
1028                 ret = 1;
1029         }
1030
1031         switch (priv->mode) {
1032         case NL80211_IFTYPE_STATION:
1033                 *aid = 1;
1034                 break;
1035         case NL80211_IFTYPE_AP:
1036         case NL80211_IFTYPE_ADHOC:
1037                 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
1038                         *aid = 0;
1039                         *queue = 3;
1040                         return 0;
1041                 }
1042                 if (info->control.sta)
1043                         *aid = info->control.sta->aid;
1044                 else
1045                         *flags = P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1046         }
1047         return ret;
1048 }
1049
1050 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
1051 {
1052         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1053         struct ieee80211_tx_queue_stats *current_queue = NULL;
1054         struct p54_common *priv = dev->priv;
1055         struct p54_hdr *hdr;
1056         struct p54_tx_data *txhdr;
1057         size_t padding, len, tim_len;
1058         int i, j, ridx;
1059         u16 hdr_flags = 0, aid = 0;
1060         u8 rate, queue;
1061         u8 cts_rate = 0x20;
1062         u8 rc_flags;
1063         u8 calculated_tries[4];
1064         u8 nrates = 0, nremaining = 8;
1065
1066         queue = skb_get_queue_mapping(skb);
1067
1068         if (p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid)) {
1069                 current_queue = &priv->tx_stats[queue];
1070                 if (unlikely(current_queue->len > current_queue->limit))
1071                         return NETDEV_TX_BUSY;
1072                 current_queue->len++;
1073                 current_queue->count++;
1074                 if (current_queue->len == current_queue->limit)
1075                         ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
1076         }
1077
1078         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
1079         len = skb->len;
1080
1081         if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) {
1082                 if (info->control.sta)
1083                         if (p54_sta_unlock(dev, info->control.sta->addr)) {
1084                                 if (current_queue) {
1085                                         current_queue->len--;
1086                                         current_queue->count--;
1087                                 }
1088                                 return NETDEV_TX_BUSY;
1089                         }
1090         }
1091
1092         txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
1093         hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
1094
1095         if (padding)
1096                 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
1097         hdr->len = cpu_to_le16(len);
1098         hdr->type = cpu_to_le16(aid);
1099         hdr->rts_tries = info->control.rates[0].count;
1100
1101         /*
1102          * we register the rates in perfect order, and
1103          * RTS/CTS won't happen on 5 GHz
1104          */
1105         cts_rate = info->control.rts_cts_rate_idx;
1106
1107         memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
1108
1109         /* see how many rates got used */
1110         for (i = 0; i < 4; i++) {
1111                 if (info->control.rates[i].idx < 0)
1112                         break;
1113                 nrates++;
1114         }
1115
1116         /* limit tries to 8/nrates per rate */
1117         for (i = 0; i < nrates; i++) {
1118                 /*
1119                  * The magic expression here is equivalent to 8/nrates for
1120                  * all values that matter, but avoids division and jumps.
1121                  * Note that nrates can only take the values 1 through 4.
1122                  */
1123                 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
1124                                                  info->control.rates[i].count);
1125                 nremaining -= calculated_tries[i];
1126         }
1127
1128         /* if there are tries left, distribute from back to front */
1129         for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
1130                 int tmp = info->control.rates[i].count - calculated_tries[i];
1131
1132                 if (tmp <= 0)
1133                         continue;
1134                 /* RC requested more tries at this rate */
1135
1136                 tmp = min_t(int, tmp, nremaining);
1137                 calculated_tries[i] += tmp;
1138                 nremaining -= tmp;
1139         }
1140
1141         ridx = 0;
1142         for (i = 0; i < nrates && ridx < 8; i++) {
1143                 /* we register the rates in perfect order */
1144                 rate = info->control.rates[i].idx;
1145                 if (info->band == IEEE80211_BAND_5GHZ)
1146                         rate += 4;
1147
1148                 /* store the count we actually calculated for TX status */
1149                 info->control.rates[i].count = calculated_tries[i];
1150
1151                 rc_flags = info->control.rates[i].flags;
1152                 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
1153                         rate |= 0x10;
1154                         cts_rate |= 0x10;
1155                 }
1156                 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
1157                         rate |= 0x40;
1158                 else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1159                         rate |= 0x20;
1160                 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
1161                         txhdr->rateset[ridx] = rate;
1162                         ridx++;
1163                 }
1164         }
1165
1166         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
1167                 hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
1168
1169         /* TODO: enable bursting */
1170         hdr->flags = cpu_to_le16(hdr_flags);
1171         hdr->tries = ridx;
1172         txhdr->crypt_offset = 0;
1173         txhdr->rts_rate_idx = 0;
1174         txhdr->key_type = 0;
1175         txhdr->key_len = 0;
1176         txhdr->hw_queue = queue;
1177         txhdr->backlog = 32;
1178         memset(txhdr->durations, 0, sizeof(txhdr->durations));
1179         txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
1180                 2 : info->antenna_sel_tx - 1;
1181         txhdr->output_power = priv->output_power;
1182         txhdr->cts_rate = cts_rate;
1183         if (padding)
1184                 txhdr->align[0] = padding;
1185
1186         /* modifies skb->cb and with it info, so must be last! */
1187         if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len))) {
1188                 skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
1189                 if (current_queue) {
1190                         current_queue->len--;
1191                         current_queue->count--;
1192                 }
1193                 return NETDEV_TX_BUSY;
1194         }
1195         priv->tx(dev, skb, 0);
1196         return 0;
1197 }
1198
1199 static int p54_setup_mac(struct ieee80211_hw *dev, u16 mode, const u8 *bssid)
1200 {
1201         struct p54_common *priv = dev->priv;
1202         struct sk_buff *skb;
1203         struct p54_setup_mac *setup;
1204
1205         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
1206                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
1207                             GFP_ATOMIC);
1208         if (!skb)
1209                 return -ENOMEM;
1210
1211         setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
1212         priv->mac_mode = mode;
1213         setup->mac_mode = cpu_to_le16(mode);
1214         memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
1215         if (!bssid)
1216                 memset(setup->bssid, ~0, ETH_ALEN);
1217         else
1218                 memcpy(setup->bssid, bssid, ETH_ALEN);
1219         setup->rx_antenna = priv->rx_antenna;
1220         if (priv->fw_var < 0x500) {
1221                 setup->v1.basic_rate_mask = cpu_to_le32(0x15f);
1222                 setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
1223                 setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
1224                 setup->v1.rxhw = cpu_to_le16(priv->rxhw);
1225                 setup->v1.wakeup_timer = cpu_to_le16(500);
1226                 setup->v1.unalloc0 = cpu_to_le16(0);
1227         } else {
1228                 setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
1229                 setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
1230                 setup->v2.rxhw = cpu_to_le16(priv->rxhw);
1231                 setup->v2.timer = cpu_to_le16(1000);
1232                 setup->v2.truncate = cpu_to_le16(48896);
1233                 setup->v2.basic_rate_mask = cpu_to_le32(0x15f);
1234                 setup->v2.sbss_offset = 0;
1235                 setup->v2.mcast_window = 0;
1236                 setup->v2.rx_rssi_threshold = 0;
1237                 setup->v2.rx_ed_threshold = 0;
1238                 setup->v2.ref_clock = cpu_to_le32(644245094);
1239                 setup->v2.lpf_bandwidth = cpu_to_le16(65535);
1240                 setup->v2.osc_start_delay = cpu_to_le16(65535);
1241         }
1242         priv->tx(dev, skb, 1);
1243         return 0;
1244 }
1245
1246 static int p54_set_freq(struct ieee80211_hw *dev, u16 frequency)
1247 {
1248         struct p54_common *priv = dev->priv;
1249         struct sk_buff *skb;
1250         struct p54_scan *chan;
1251         unsigned int i;
1252         void *entry;
1253         __le16 freq = cpu_to_le16(frequency);
1254
1255         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
1256                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
1257                             GFP_ATOMIC);
1258         if (!skb)
1259                 return -ENOMEM;
1260
1261         chan = (struct p54_scan *) skb_put(skb, sizeof(*chan));
1262         memset(chan->padding1, 0, sizeof(chan->padding1));
1263         chan->mode = cpu_to_le16(P54_SCAN_EXIT);
1264         chan->dwell = cpu_to_le16(0x0);
1265
1266         for (i = 0; i < priv->iq_autocal_len; i++) {
1267                 if (priv->iq_autocal[i].freq != freq)
1268                         continue;
1269
1270                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
1271                        sizeof(*priv->iq_autocal));
1272                 break;
1273         }
1274         if (i == priv->iq_autocal_len)
1275                 goto err;
1276
1277         for (i = 0; i < priv->output_limit_len; i++) {
1278                 if (priv->output_limit[i].freq != freq)
1279                         continue;
1280
1281                 chan->val_barker = 0x38;
1282                 chan->val_bpsk = chan->dup_bpsk =
1283                         priv->output_limit[i].val_bpsk;
1284                 chan->val_qpsk = chan->dup_qpsk =
1285                         priv->output_limit[i].val_qpsk;
1286                 chan->val_16qam = chan->dup_16qam =
1287                         priv->output_limit[i].val_16qam;
1288                 chan->val_64qam = chan->dup_64qam =
1289                         priv->output_limit[i].val_64qam;
1290                 break;
1291         }
1292         if (i == priv->output_limit_len)
1293                 goto err;
1294
1295         entry = priv->curve_data->data;
1296         for (i = 0; i < priv->curve_data->channels; i++) {
1297                 if (*((__le16 *)entry) != freq) {
1298                         entry += sizeof(__le16);
1299                         entry += sizeof(struct p54_pa_curve_data_sample) *
1300                                  priv->curve_data->points_per_channel;
1301                         continue;
1302                 }
1303
1304                 entry += sizeof(__le16);
1305                 chan->pa_points_per_curve =
1306                         min(priv->curve_data->points_per_channel, (u8) 8);
1307
1308                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
1309                        chan->pa_points_per_curve);
1310                 break;
1311         }
1312
1313         if (priv->fw_var < 0x500) {
1314                 chan->v1.rssical_mul = cpu_to_le16(130);
1315                 chan->v1.rssical_add = cpu_to_le16(0xfe70);
1316         } else {
1317                 chan->v2.rssical_mul = cpu_to_le16(130);
1318                 chan->v2.rssical_add = cpu_to_le16(0xfe70);
1319                 chan->v2.basic_rate_mask = cpu_to_le32(0x15f);
1320                 memset(chan->v2.rts_rates, 0, 8);
1321         }
1322         priv->tx(dev, skb, 1);
1323         return 0;
1324
1325  err:
1326         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
1327         kfree_skb(skb);
1328         return -EINVAL;
1329 }
1330
1331 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
1332 {
1333         struct p54_common *priv = dev->priv;
1334         struct sk_buff *skb;
1335         struct p54_led *led;
1336
1337         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
1338                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
1339                         GFP_ATOMIC);
1340         if (!skb)
1341                 return -ENOMEM;
1342
1343         led = (struct p54_led *)skb_put(skb, sizeof(*led));
1344         led->mode = cpu_to_le16(mode);
1345         led->led_permanent = cpu_to_le16(link);
1346         led->led_temporary = cpu_to_le16(act);
1347         led->duration = cpu_to_le16(1000);
1348         priv->tx(dev, skb, 1);
1349         return 0;
1350 }
1351
1352 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
1353 do {                                                            \
1354         queue.aifs = cpu_to_le16(ai_fs);                        \
1355         queue.cwmin = cpu_to_le16(cw_min);                      \
1356         queue.cwmax = cpu_to_le16(cw_max);                      \
1357         queue.txop = cpu_to_le16(_txop);                        \
1358 } while(0)
1359
1360 static int p54_set_edcf(struct ieee80211_hw *dev)
1361 {
1362         struct p54_common *priv = dev->priv;
1363         struct sk_buff *skb;
1364         struct p54_edcf *edcf;
1365
1366         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
1367                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
1368                         GFP_ATOMIC);
1369         if (!skb)
1370                 return -ENOMEM;
1371
1372         edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
1373         if (priv->use_short_slot) {
1374                 edcf->slottime = 9;
1375                 edcf->sifs = 0x10;
1376                 edcf->eofpad = 0x00;
1377         } else {
1378                 edcf->slottime = 20;
1379                 edcf->sifs = 0x0a;
1380                 edcf->eofpad = 0x06;
1381         }
1382         /* (see prism54/isl_oid.h for further details) */
1383         edcf->frameburst = cpu_to_le16(0);
1384         edcf->round_trip_delay = cpu_to_le16(0);
1385         memset(edcf->mapping, 0, sizeof(edcf->mapping));
1386         memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
1387         priv->tx(dev, skb, 1);
1388         return 0;
1389 }
1390
1391 static int p54_init_stats(struct ieee80211_hw *dev)
1392 {
1393         struct p54_common *priv = dev->priv;
1394
1395         priv->cached_stats = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL,
1396                         sizeof(struct p54_hdr) + sizeof(struct p54_statistics),
1397                         P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
1398         if (!priv->cached_stats)
1399                         return -ENOMEM;
1400
1401         mod_timer(&priv->stats_timer, jiffies + HZ);
1402         return 0;
1403 }
1404
1405 static int p54_beacon_tim(struct sk_buff *skb)
1406 {
1407         /*
1408          * the good excuse for this mess is ... the firmware.
1409          * The dummy TIM MUST be at the end of the beacon frame,
1410          * because it'll be overwritten!
1411          */
1412
1413         struct ieee80211_mgmt *mgmt = (void *)skb->data;
1414         u8 *pos, *end;
1415
1416         if (skb->len <= sizeof(mgmt)) {
1417                 printk(KERN_ERR "p54: beacon is too short!\n");
1418                 return -EINVAL;
1419         }
1420
1421         pos = (u8 *)mgmt->u.beacon.variable;
1422         end = skb->data + skb->len;
1423         while (pos < end) {
1424                 if (pos + 2 + pos[1] > end) {
1425                         printk(KERN_ERR "p54: parsing beacon failed\n");
1426                         return -EINVAL;
1427                 }
1428
1429                 if (pos[0] == WLAN_EID_TIM) {
1430                         u8 dtim_len = pos[1];
1431                         u8 dtim_period = pos[3];
1432                         u8 *next = pos + 2 + dtim_len;
1433
1434                         if (dtim_len < 3) {
1435                                 printk(KERN_ERR "p54: invalid dtim len!\n");
1436                                 return -EINVAL;
1437                         }
1438                         memmove(pos, next, end - next);
1439
1440                         if (dtim_len > 3)
1441                                 skb_trim(skb, skb->len - (dtim_len - 3));
1442
1443                         pos = end - (dtim_len + 2);
1444
1445                         /* add the dummy at the end */
1446                         pos[0] = WLAN_EID_TIM;
1447                         pos[1] = 3;
1448                         pos[2] = 0;
1449                         pos[3] = dtim_period;
1450                         pos[4] = 0;
1451                         return 0;
1452                 }
1453                 pos += 2 + pos[1];
1454         }
1455         return 0;
1456 }
1457
1458 static int p54_beacon_update(struct ieee80211_hw *dev,
1459                         struct ieee80211_vif *vif)
1460 {
1461         struct p54_common *priv = dev->priv;
1462         struct sk_buff *beacon;
1463         int ret;
1464
1465         if (priv->cached_beacon) {
1466                 p54_tx_cancel(dev, priv->cached_beacon);
1467                 /* wait for the last beacon the be freed */
1468                 msleep(10);
1469         }
1470
1471         beacon = ieee80211_beacon_get(dev, vif);
1472         if (!beacon)
1473                 return -ENOMEM;
1474         ret = p54_beacon_tim(beacon);
1475         if (ret)
1476                 return ret;
1477         ret = p54_tx(dev, beacon);
1478         if (ret)
1479                 return ret;
1480         priv->cached_beacon = beacon;
1481         priv->tsf_high32 = 0;
1482         priv->tsf_low32 = 0;
1483
1484         return 0;
1485 }
1486
1487 static int p54_start(struct ieee80211_hw *dev)
1488 {
1489         struct p54_common *priv = dev->priv;
1490         int err;
1491
1492         mutex_lock(&priv->conf_mutex);
1493         err = priv->open(dev);
1494         if (!err)
1495                 priv->mode = NL80211_IFTYPE_MONITOR;
1496         P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
1497         P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
1498         P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
1499         P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
1500         err = p54_set_edcf(dev);
1501         if (!err)
1502                 err = p54_init_stats(dev);
1503
1504         mutex_unlock(&priv->conf_mutex);
1505         return err;
1506 }
1507
1508 static void p54_stop(struct ieee80211_hw *dev)
1509 {
1510         struct p54_common *priv = dev->priv;
1511         struct sk_buff *skb;
1512
1513         mutex_lock(&priv->conf_mutex);
1514         del_timer(&priv->stats_timer);
1515         p54_free_skb(dev, priv->cached_stats);
1516         priv->cached_stats = NULL;
1517         if (priv->cached_beacon)
1518                 p54_tx_cancel(dev, priv->cached_beacon);
1519
1520         while ((skb = skb_dequeue(&priv->tx_queue)))
1521                 kfree_skb(skb);
1522
1523         kfree(priv->cached_beacon);
1524         priv->cached_beacon = NULL;
1525         priv->stop(dev);
1526         priv->tsf_high32 = priv->tsf_low32 = 0;
1527         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1528         mutex_unlock(&priv->conf_mutex);
1529 }
1530
1531 static int p54_add_interface(struct ieee80211_hw *dev,
1532                              struct ieee80211_if_init_conf *conf)
1533 {
1534         struct p54_common *priv = dev->priv;
1535
1536         mutex_lock(&priv->conf_mutex);
1537         if (priv->mode != NL80211_IFTYPE_MONITOR) {
1538                 mutex_unlock(&priv->conf_mutex);
1539                 return -EOPNOTSUPP;
1540         }
1541
1542         switch (conf->type) {
1543         case NL80211_IFTYPE_STATION:
1544         case NL80211_IFTYPE_ADHOC:
1545         case NL80211_IFTYPE_AP:
1546                 priv->mode = conf->type;
1547                 break;
1548         default:
1549                 mutex_unlock(&priv->conf_mutex);
1550                 return -EOPNOTSUPP;
1551         }
1552
1553         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1554
1555         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1556
1557         switch (conf->type) {
1558         case NL80211_IFTYPE_STATION:
1559                 p54_setup_mac(dev, P54_FILTER_TYPE_STATION, NULL);
1560                 break;
1561         case NL80211_IFTYPE_AP:
1562                 p54_setup_mac(dev, P54_FILTER_TYPE_AP, priv->mac_addr);
1563                 break;
1564         case NL80211_IFTYPE_ADHOC:
1565                 p54_setup_mac(dev, P54_FILTER_TYPE_IBSS, NULL);
1566                 break;
1567         default:
1568                 BUG();  /* impossible */
1569                 break;
1570         }
1571
1572         p54_set_leds(dev, 1, 0, 0);
1573
1574         mutex_unlock(&priv->conf_mutex);
1575         return 0;
1576 }
1577
1578 static void p54_remove_interface(struct ieee80211_hw *dev,
1579                                  struct ieee80211_if_init_conf *conf)
1580 {
1581         struct p54_common *priv = dev->priv;
1582
1583         mutex_lock(&priv->conf_mutex);
1584         if (priv->cached_beacon)
1585                 p54_tx_cancel(dev, priv->cached_beacon);
1586         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1587         priv->mode = NL80211_IFTYPE_MONITOR;
1588         memset(priv->mac_addr, 0, ETH_ALEN);
1589         mutex_unlock(&priv->conf_mutex);
1590 }
1591
1592 static int p54_config(struct ieee80211_hw *dev, u32 changed)
1593 {
1594         int ret;
1595         struct p54_common *priv = dev->priv;
1596         struct ieee80211_conf *conf = &dev->conf;
1597
1598         mutex_lock(&priv->conf_mutex);
1599         priv->rx_antenna = 2; /* automatic */
1600         priv->output_power = conf->power_level << 2;
1601         ret = p54_set_freq(dev, conf->channel->center_freq);
1602         if (!ret)
1603                 ret = p54_set_edcf(dev);
1604         mutex_unlock(&priv->conf_mutex);
1605         return ret;
1606 }
1607
1608 static int p54_config_interface(struct ieee80211_hw *dev,
1609                                 struct ieee80211_vif *vif,
1610                                 struct ieee80211_if_conf *conf)
1611 {
1612         struct p54_common *priv = dev->priv;
1613         int ret = 0;
1614
1615         mutex_lock(&priv->conf_mutex);
1616         switch (priv->mode) {
1617         case NL80211_IFTYPE_STATION:
1618                 ret = p54_setup_mac(dev, P54_FILTER_TYPE_STATION, conf->bssid);
1619                 if (ret)
1620                         goto out;
1621                 ret = p54_set_leds(dev, 1,
1622                                    !is_multicast_ether_addr(conf->bssid), 0);
1623                 if (ret)
1624                         goto out;
1625                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1626                 break;
1627         case NL80211_IFTYPE_AP:
1628         case NL80211_IFTYPE_ADHOC:
1629                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1630                 ret = p54_set_freq(dev, dev->conf.channel->center_freq);
1631                 if (ret)
1632                         goto out;
1633                 ret = p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1634                 if (ret)
1635                         goto out;
1636                 if (conf->changed & IEEE80211_IFCC_BEACON) {
1637                         ret = p54_beacon_update(dev, vif);
1638                         if (ret)
1639                                 goto out;
1640                         ret = p54_set_edcf(dev);
1641                         if (ret)
1642                                 goto out;
1643                 }
1644         }
1645 out:
1646         mutex_unlock(&priv->conf_mutex);
1647         return ret;
1648 }
1649
1650 static void p54_configure_filter(struct ieee80211_hw *dev,
1651                                  unsigned int changed_flags,
1652                                  unsigned int *total_flags,
1653                                  int mc_count, struct dev_mc_list *mclist)
1654 {
1655         struct p54_common *priv = dev->priv;
1656
1657         *total_flags &= FIF_BCN_PRBRESP_PROMISC |
1658                         FIF_PROMISC_IN_BSS |
1659                         FIF_FCSFAIL;
1660
1661         priv->filter_flags = *total_flags;
1662
1663         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1664                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1665                         p54_setup_mac(dev, priv->mac_mode, NULL);
1666                 else
1667                         p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1668         }
1669
1670         if (changed_flags & FIF_PROMISC_IN_BSS) {
1671                 if (*total_flags & FIF_PROMISC_IN_BSS)
1672                         p54_setup_mac(dev, priv->mac_mode | 0x8, NULL);
1673                 else
1674                         p54_setup_mac(dev, priv->mac_mode & ~0x8, priv->bssid);
1675         }
1676 }
1677
1678 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1679                        const struct ieee80211_tx_queue_params *params)
1680 {
1681         struct p54_common *priv = dev->priv;
1682         int ret;
1683
1684         mutex_lock(&priv->conf_mutex);
1685         if ((params) && !(queue > 4)) {
1686                 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
1687                         params->cw_min, params->cw_max, params->txop);
1688         } else
1689                 ret = -EINVAL;
1690         if (!ret)
1691                 ret = p54_set_edcf(dev);
1692         mutex_unlock(&priv->conf_mutex);
1693         return ret;
1694 }
1695
1696 static int p54_init_xbow_synth(struct ieee80211_hw *dev)
1697 {
1698         struct p54_common *priv = dev->priv;
1699         struct sk_buff *skb;
1700         struct p54_xbow_synth *xbow;
1701
1702         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
1703                             sizeof(struct p54_hdr),
1704                             P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
1705                             GFP_KERNEL);
1706         if (!skb)
1707                 return -ENOMEM;
1708
1709         xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
1710         xbow->magic1 = cpu_to_le16(0x1);
1711         xbow->magic2 = cpu_to_le16(0x2);
1712         xbow->freq = cpu_to_le16(5390);
1713         memset(xbow->padding, 0, sizeof(xbow->padding));
1714         priv->tx(dev, skb, 1);
1715         return 0;
1716 }
1717
1718 static void p54_statistics_timer(unsigned long data)
1719 {
1720         struct ieee80211_hw *dev = (struct ieee80211_hw *) data;
1721         struct p54_common *priv = dev->priv;
1722
1723         BUG_ON(!priv->cached_stats);
1724
1725         priv->tx(dev, priv->cached_stats, 0);
1726 }
1727
1728 static int p54_get_stats(struct ieee80211_hw *dev,
1729                          struct ieee80211_low_level_stats *stats)
1730 {
1731         struct p54_common *priv = dev->priv;
1732
1733         del_timer(&priv->stats_timer);
1734         p54_statistics_timer((unsigned long)dev);
1735
1736         if (!wait_for_completion_interruptible_timeout(&priv->stats_comp, HZ)) {
1737                 printk(KERN_ERR "%s: device does not respond!\n",
1738                         wiphy_name(dev->wiphy));
1739                 return -EBUSY;
1740         }
1741
1742         memcpy(stats, &priv->stats, sizeof(*stats));
1743
1744         return 0;
1745 }
1746
1747 static int p54_get_tx_stats(struct ieee80211_hw *dev,
1748                             struct ieee80211_tx_queue_stats *stats)
1749 {
1750         struct p54_common *priv = dev->priv;
1751
1752         memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
1753
1754         return 0;
1755 }
1756
1757 static void p54_bss_info_changed(struct ieee80211_hw *dev,
1758                                  struct ieee80211_vif *vif,
1759                                  struct ieee80211_bss_conf *info,
1760                                  u32 changed)
1761 {
1762         struct p54_common *priv = dev->priv;
1763
1764         if (changed & BSS_CHANGED_ERP_SLOT) {
1765                 priv->use_short_slot = info->use_short_slot;
1766                 p54_set_edcf(dev);
1767         }
1768 }
1769
1770 static const struct ieee80211_ops p54_ops = {
1771         .tx                     = p54_tx,
1772         .start                  = p54_start,
1773         .stop                   = p54_stop,
1774         .add_interface          = p54_add_interface,
1775         .remove_interface       = p54_remove_interface,
1776         .set_tim                = p54_set_tim,
1777         .config                 = p54_config,
1778         .config_interface       = p54_config_interface,
1779         .bss_info_changed       = p54_bss_info_changed,
1780         .configure_filter       = p54_configure_filter,
1781         .conf_tx                = p54_conf_tx,
1782         .get_stats              = p54_get_stats,
1783         .get_tx_stats           = p54_get_tx_stats
1784 };
1785
1786 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
1787 {
1788         struct ieee80211_hw *dev;
1789         struct p54_common *priv;
1790
1791         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1792         if (!dev)
1793                 return NULL;
1794
1795         priv = dev->priv;
1796         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1797         skb_queue_head_init(&priv->tx_queue);
1798         dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
1799                      IEEE80211_HW_SIGNAL_DBM |
1800                      IEEE80211_HW_NOISE_DBM;
1801
1802         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION |
1803                                           NL80211_IFTYPE_ADHOC |
1804                                           NL80211_IFTYPE_AP);
1805
1806         dev->channel_change_time = 1000;        /* TODO: find actual value */
1807         priv->tx_stats[0].limit = 1;            /* Beacon queue */
1808         priv->tx_stats[1].limit = 1;            /* Probe queue for HW scan */
1809         priv->tx_stats[2].limit = 3;            /* queue for MLMEs */
1810         priv->tx_stats[3].limit = 3;            /* Broadcast / MC queue */
1811         priv->tx_stats[4].limit = 5;            /* Data */
1812         dev->queues = 1;
1813         priv->noise = -94;
1814         /*
1815          * We support at most 8 tries no matter which rate they're at,
1816          * we cannot support max_rates * max_rate_tries as we set it
1817          * here, but setting it correctly to 4/2 or so would limit us
1818          * artificially if the RC algorithm wants just two rates, so
1819          * let's say 4/7, we'll redistribute it at TX time, see the
1820          * comments there.
1821          */
1822         dev->max_rates = 4;
1823         dev->max_rate_tries = 7;
1824         dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
1825                                  sizeof(struct p54_tx_data);
1826
1827         mutex_init(&priv->conf_mutex);
1828         init_completion(&priv->eeprom_comp);
1829         init_completion(&priv->stats_comp);
1830         setup_timer(&priv->stats_timer, p54_statistics_timer,
1831                 (unsigned long)dev);
1832
1833         return dev;
1834 }
1835 EXPORT_SYMBOL_GPL(p54_init_common);
1836
1837 void p54_free_common(struct ieee80211_hw *dev)
1838 {
1839         struct p54_common *priv = dev->priv;
1840         del_timer(&priv->stats_timer);
1841         kfree_skb(priv->cached_stats);
1842         kfree(priv->iq_autocal);
1843         kfree(priv->output_limit);
1844         kfree(priv->curve_data);
1845 }
1846 EXPORT_SYMBOL_GPL(p54_free_common);
1847
1848 static int __init p54_init(void)
1849 {
1850         return 0;
1851 }
1852
1853 static void __exit p54_exit(void)
1854 {
1855 }
1856
1857 module_init(p54_init);
1858 module_exit(p54_exit);