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  *   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 static int modparam_nohwcrypt;
  29 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
  30 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
  31 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  32 MODULE_DESCRIPTION("Softmac Prism54 common code");
  33 MODULE_LICENSE("GPL");
  34 MODULE_ALIAS("prism54common");
  35
  36 static struct ieee80211_rate p54_bgrates[] = {
  37         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  38         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  39         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  40         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  41         { .bitrate = 60, .hw_value = 4, },
  42         { .bitrate = 90, .hw_value = 5, },
  43         { .bitrate = 120, .hw_value = 6, },
  44         { .bitrate = 180, .hw_value = 7, },
  45         { .bitrate = 240, .hw_value = 8, },
  46         { .bitrate = 360, .hw_value = 9, },
  47         { .bitrate = 480, .hw_value = 10, },
  48         { .bitrate = 540, .hw_value = 11, },
  49 };
  50
  51 static struct ieee80211_channel p54_bgchannels[] = {
  52         { .center_freq = 2412, .hw_value = 1, },
  53         { .center_freq = 2417, .hw_value = 2, },
  54         { .center_freq = 2422, .hw_value = 3, },
  55         { .center_freq = 2427, .hw_value = 4, },
  56         { .center_freq = 2432, .hw_value = 5, },
  57         { .center_freq = 2437, .hw_value = 6, },
  58         { .center_freq = 2442, .hw_value = 7, },
  59         { .center_freq = 2447, .hw_value = 8, },
  60         { .center_freq = 2452, .hw_value = 9, },
  61         { .center_freq = 2457, .hw_value = 10, },
  62         { .center_freq = 2462, .hw_value = 11, },
  63         { .center_freq = 2467, .hw_value = 12, },
  64         { .center_freq = 2472, .hw_value = 13, },
  65         { .center_freq = 2484, .hw_value = 14, },
  66 };
  67
  68 static struct ieee80211_supported_band band_2GHz = {
  69         .channels = p54_bgchannels,
  70         .n_channels = ARRAY_SIZE(p54_bgchannels),
  71         .bitrates = p54_bgrates,
  72         .n_bitrates = ARRAY_SIZE(p54_bgrates),
  73 };
  74
  75 static struct ieee80211_rate p54_arates[] = {
  76         { .bitrate = 60, .hw_value = 4, },
  77         { .bitrate = 90, .hw_value = 5, },
  78         { .bitrate = 120, .hw_value = 6, },
  79         { .bitrate = 180, .hw_value = 7, },
  80         { .bitrate = 240, .hw_value = 8, },
  81         { .bitrate = 360, .hw_value = 9, },
  82         { .bitrate = 480, .hw_value = 10, },
  83         { .bitrate = 540, .hw_value = 11, },
  84 };
  85
  86 static struct ieee80211_channel p54_achannels[] = {
  87         { .center_freq = 4920 },
  88         { .center_freq = 4940 },
  89         { .center_freq = 4960 },
  90         { .center_freq = 4980 },
  91         { .center_freq = 5040 },
  92         { .center_freq = 5060 },
  93         { .center_freq = 5080 },
  94         { .center_freq = 5170 },
  95         { .center_freq = 5180 },
  96         { .center_freq = 5190 },
  97         { .center_freq = 5200 },
  98         { .center_freq = 5210 },
  99         { .center_freq = 5220 },
 100         { .center_freq = 5230 },
 101         { .center_freq = 5240 },
 102         { .center_freq = 5260 },
 103         { .center_freq = 5280 },
 104         { .center_freq = 5300 },
 105         { .center_freq = 5320 },
 106         { .center_freq = 5500 },
 107         { .center_freq = 5520 },
 108         { .center_freq = 5540 },
 109         { .center_freq = 5560 },
 110         { .center_freq = 5580 },
 111         { .center_freq = 5600 },
 112         { .center_freq = 5620 },
 113         { .center_freq = 5640 },
 114         { .center_freq = 5660 },
 115         { .center_freq = 5680 },
 116         { .center_freq = 5700 },
 117         { .center_freq = 5745 },
 118         { .center_freq = 5765 },
 119         { .center_freq = 5785 },
 120         { .center_freq = 5805 },
 121         { .center_freq = 5825 },
 122 };
 123
 124 static struct ieee80211_supported_band band_5GHz = {
 125         .channels = p54_achannels,
 126         .n_channels = ARRAY_SIZE(p54_achannels),
 127         .bitrates = p54_arates,
 128         .n_bitrates = ARRAY_SIZE(p54_arates),
 129 };
 130
 131 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
 132 {
 133         struct p54_common *priv = dev->priv;
 134         struct bootrec_exp_if *exp_if;
 135         struct bootrec *bootrec;
 136         u32 *data = (u32 *)fw->data;
 137         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
 138         u8 *fw_version = NULL;
 139         size_t len;
 140         int i;
 141         int maxlen;
 142
 143         if (priv->rx_start)
 144                 return 0;
 145
 146         while (data < end_data && *data)
 147                 data++;
 148
 149         while (data < end_data && !*data)
 150                 data++;
 151
 152         bootrec = (struct bootrec *) data;
 153
 154         while (bootrec->data <= end_data &&
 155                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
 156                 u32 code = le32_to_cpu(bootrec->code);
 157                 switch (code) {
 158                 case BR_CODE_COMPONENT_ID:
 159                         priv->fw_interface = be32_to_cpup((__be32 *)
 160                                              bootrec->data);
 161                         switch (priv->fw_interface) {
 162                         case FW_LM86:
 163                         case FW_LM20:
 164                         case FW_LM87: {
 165                                 char *iftype = (char *)bootrec->data;
 166                                 printk(KERN_INFO "%s: p54 detected a LM%c%c "
 167                                                  "firmware\n",
 168                                         wiphy_name(dev->wiphy),
 169                                         iftype[2], iftype[3]);
 170                                 break;
 171                                 }
 172                         case FW_FMAC:
 173                         default:
 174                                 printk(KERN_ERR "%s: unsupported firmware\n",
 175                                         wiphy_name(dev->wiphy));
 176                                 return -ENODEV;
 177                         }
 178                         break;
 179                 case BR_CODE_COMPONENT_VERSION:
 180                         /* 24 bytes should be enough for all firmwares */
 181                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
 182                                 fw_version = (unsigned char*)bootrec->data;
 183                         break;
 184                 case BR_CODE_DESCR: {
 185                         struct bootrec_desc *desc =
 186                                 (struct bootrec_desc *)bootrec->data;
 187                         priv->rx_start = le32_to_cpu(desc->rx_start);
 188                         /* FIXME add sanity checking */
 189                         priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
 190                         priv->headroom = desc->headroom;
 191                         priv->tailroom = desc->tailroom;
 192                         priv->privacy_caps = desc->privacy_caps;
 193                         priv->rx_keycache_size = desc->rx_keycache_size;
 194                         if (le32_to_cpu(bootrec->len) == 11)
 195                                 priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
 196                         else
 197                                 priv->rx_mtu = (size_t)
 198                                         0x620 - priv->tx_hdr_len;
 199                         maxlen = priv->tx_hdr_len + /* USB devices */
 200                                  sizeof(struct p54_rx_data) +
 201                                  4 + /* rx alignment */
 202                                  IEEE80211_MAX_FRAG_THRESHOLD;
 203                         if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) {
 204                                 printk(KERN_INFO "p54: rx_mtu reduced from %d "
 205                                                  "to %d\n", priv->rx_mtu,
 206                                                  maxlen);
 207                                 priv->rx_mtu = maxlen;
 208                         }
 209                         break;
 210                         }
 211                 case BR_CODE_EXPOSED_IF:
 212                         exp_if = (struct bootrec_exp_if *) bootrec->data;
 213                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
 214                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
 215                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
 216                         break;
 217                 case BR_CODE_DEPENDENT_IF:
 218                         break;
 219                 case BR_CODE_END_OF_BRA:
 220                 case LEGACY_BR_CODE_END_OF_BRA:
 221                         end_data = NULL;
 222                         break;
 223                 default:
 224                         break;
 225                 }
 226                 bootrec = (struct bootrec *)&bootrec->data[len];
 227         }
 228
 229         if (fw_version)
 230                 printk(KERN_INFO "%s: FW rev %s - Softmac protocol %x.%x\n",
 231                         wiphy_name(dev->wiphy), fw_version,
 232                         priv->fw_var >> 8, priv->fw_var & 0xff);
 233
 234         if (priv->fw_var < 0x500)
 235                 printk(KERN_INFO "%s: you are using an obsolete firmware. "
 236                        "visit http://wireless.kernel.org/en/users/Drivers/p54 "
 237                        "and grab one for \"kernel >= 2.6.28\"!\n",
 238                         wiphy_name(dev->wiphy));
 239
 240         if (priv->fw_var >= 0x300) {
 241                 /* Firmware supports QoS, use it! */
 242                 priv->tx_stats[4].limit = 3;            /* AC_VO */
 243                 priv->tx_stats[5].limit = 4;            /* AC_VI */
 244                 priv->tx_stats[6].limit = 3;            /* AC_BE */
 245                 priv->tx_stats[7].limit = 2;            /* AC_BK */
 246                 dev->queues = 4;
 247         }
 248
 249         if (!modparam_nohwcrypt)
 250                 printk(KERN_INFO "%s: cryptographic accelerator "
 251                                  "WEP:%s, TKIP:%s, CCMP:%s\n",
 252                         wiphy_name(dev->wiphy),
 253                         (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" :
 254                         "no", (priv->privacy_caps & (BR_DESC_PRIV_CAP_TKIP |
 255                          BR_DESC_PRIV_CAP_MICHAEL)) ? "YES" : "no",
 256                         (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP) ?
 257                         "YES" : "no");
 258
 259         return 0;
 260 }
 261 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 262
 263 static int p54_convert_rev0(struct ieee80211_hw *dev,
 264                             struct pda_pa_curve_data *curve_data)
 265 {
 266         struct p54_common *priv = dev->priv;
 267         struct p54_pa_curve_data_sample *dst;
 268         struct pda_pa_curve_data_sample_rev0 *src;
 269         size_t cd_len = sizeof(*curve_data) +
 270                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 271                  curve_data->channels;
 272         unsigned int i, j;
 273         void *source, *target;
 274
 275         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 276         if (!priv->curve_data)
 277                 return -ENOMEM;
 278
 279         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 280         source = curve_data->data;
 281         target = priv->curve_data->data;
 282         for (i = 0; i < curve_data->channels; i++) {
 283                 __le16 *freq = source;
 284                 source += sizeof(__le16);
 285                 *((__le16 *)target) = *freq;
 286                 target += sizeof(__le16);
 287                 for (j = 0; j < curve_data->points_per_channel; j++) {
 288                         dst = target;
 289                         src = source;
 290
 291                         dst->rf_power = src->rf_power;
 292                         dst->pa_detector = src->pa_detector;
 293                         dst->data_64qam = src->pcv;
 294                         /* "invent" the points for the other modulations */
 295 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 296                         dst->data_16qam = SUB(src->pcv, 12);
 297                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 298                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 299                         dst->data_barker = SUB(dst->data_bpsk, 14);
 300 #undef SUB
 301                         target += sizeof(*dst);
 302                         source += sizeof(*src);
 303                 }
 304         }
 305
 306         return 0;
 307 }
 308
 309 static int p54_convert_rev1(struct ieee80211_hw *dev,
 310                             struct pda_pa_curve_data *curve_data)
 311 {
 312         struct p54_common *priv = dev->priv;
 313         struct p54_pa_curve_data_sample *dst;
 314         struct pda_pa_curve_data_sample_rev1 *src;
 315         size_t cd_len = sizeof(*curve_data) +
 316                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 317                  curve_data->channels;
 318         unsigned int i, j;
 319         void *source, *target;
 320
 321         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 322         if (!priv->curve_data)
 323                 return -ENOMEM;
 324
 325         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 326         source = curve_data->data;
 327         target = priv->curve_data->data;
 328         for (i = 0; i < curve_data->channels; i++) {
 329                 __le16 *freq = source;
 330                 source += sizeof(__le16);
 331                 *((__le16 *)target) = *freq;
 332                 target += sizeof(__le16);
 333                 for (j = 0; j < curve_data->points_per_channel; j++) {
 334                         memcpy(target, source, sizeof(*src));
 335
 336                         target += sizeof(*dst);
 337                         source += sizeof(*src);
 338                 }
 339                 source++;
 340         }
 341
 342         return 0;
 343 }
 344
 345 static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
 346                               "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
 347 static int p54_init_xbow_synth(struct ieee80211_hw *dev);
 348
 349 static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
 350                              u16 type)
 351 {
 352         struct p54_common *priv = dev->priv;
 353         int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
 354         int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
 355         int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 356         int i;
 357
 358         if (len != (entry_size * num_entries)) {
 359                 printk(KERN_ERR "%s: unknown rssi calibration data packing "
 360                                  " type:(%x) len:%d.\n",
 361                        wiphy_name(dev->wiphy), type, len);
 362
 363                 print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
 364                                      data, len);
 365
 366                 printk(KERN_ERR "%s: please report this issue.\n",
 367                         wiphy_name(dev->wiphy));
 368                 return;
 369         }
 370
 371         for (i = 0; i < num_entries; i++) {
 372                 struct pda_rssi_cal_entry *cal = data +
 373                                                  (offset + i * entry_size);
 374                 priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
 375                 priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
 376         }
 377 }
 378
 379 static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 380 {
 381         struct p54_common *priv = dev->priv;
 382         struct eeprom_pda_wrap *wrap = NULL;
 383         struct pda_entry *entry;
 384         unsigned int data_len, entry_len;
 385         void *tmp;
 386         int err;
 387         u8 *end = (u8 *)eeprom + len;
 388         u16 synth = 0;
 389
 390         wrap = (struct eeprom_pda_wrap *) eeprom;
 391         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 392
 393         /* verify that at least the entry length/code fits */
 394         while ((u8 *)entry <= end - sizeof(*entry)) {
 395                 entry_len = le16_to_cpu(entry->len);
 396                 data_len = ((entry_len - 1) << 1);
 397
 398                 /* abort if entry exceeds whole structure */
 399                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 400                         break;
 401
 402                 switch (le16_to_cpu(entry->code)) {
 403                 case PDR_MAC_ADDRESS:
 404                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 405                         break;
 406                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 407                         if (data_len < 2) {
 408                                 err = -EINVAL;
 409                                 goto err;
 410                         }
 411
 412                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 413                                 err = -EINVAL;
 414                                 goto err;
 415                         }
 416
 417                         priv->output_limit = kmalloc(entry->data[1] *
 418                                 sizeof(*priv->output_limit), GFP_KERNEL);
 419
 420                         if (!priv->output_limit) {
 421                                 err = -ENOMEM;
 422                                 goto err;
 423                         }
 424
 425                         memcpy(priv->output_limit, &entry->data[2],
 426                                entry->data[1]*sizeof(*priv->output_limit));
 427                         priv->output_limit_len = entry->data[1];
 428                         break;
 429                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 430                         struct pda_pa_curve_data *curve_data =
 431                                 (struct pda_pa_curve_data *)entry->data;
 432                         if (data_len < sizeof(*curve_data)) {
 433                                 err = -EINVAL;
 434                                 goto err;
 435                         }
 436
 437                         switch (curve_data->cal_method_rev) {
 438                         case 0:
 439                                 err = p54_convert_rev0(dev, curve_data);
 440                                 break;
 441                         case 1:
 442                                 err = p54_convert_rev1(dev, curve_data);
 443                                 break;
 444                         default:
 445                                 printk(KERN_ERR "%s: unknown curve data "
 446                                                 "revision %d\n",
 447                                                 wiphy_name(dev->wiphy),
 448                                                 curve_data->cal_method_rev);
 449                                 err = -ENODEV;
 450                                 break;
 451                         }
 452                         if (err)
 453                                 goto err;
 454                         }
 455                         break;
 456                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 457                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 458                         if (!priv->iq_autocal) {
 459                                 err = -ENOMEM;
 460                                 goto err;
 461                         }
 462
 463                         memcpy(priv->iq_autocal, entry->data, data_len);
 464                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 465                         break;
 466                 case PDR_INTERFACE_LIST:
 467                         tmp = entry->data;
 468                         while ((u8 *)tmp < entry->data + data_len) {
 469                                 struct bootrec_exp_if *exp_if = tmp;
 470                                 if (le16_to_cpu(exp_if->if_id) == 0xf)
 471                                         synth = le16_to_cpu(exp_if->variant);
 472                                 tmp += sizeof(struct bootrec_exp_if);
 473                         }
 474                         break;
 475                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 476                         priv->version = *(u8 *)(entry->data + 1);
 477                         break;
 478                 case PDR_RSSI_LINEAR_APPROXIMATION:
 479                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 480                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 481                         p54_parse_rssical(dev, entry->data, data_len,
 482                                           le16_to_cpu(entry->code));
 483                         break;
 484                 case PDR_END:
 485                         /* make it overrun */
 486                         entry_len = len;
 487                         break;
 488                 case PDR_MANUFACTURING_PART_NUMBER:
 489                 case PDR_PDA_VERSION:
 490                 case PDR_NIC_SERIAL_NUMBER:
 491                 case PDR_REGULATORY_DOMAIN_LIST:
 492                 case PDR_TEMPERATURE_TYPE:
 493                 case PDR_PRISM_PCI_IDENTIFIER:
 494                 case PDR_COUNTRY_INFORMATION:
 495                 case PDR_OEM_NAME:
 496                 case PDR_PRODUCT_NAME:
 497                 case PDR_UTF8_OEM_NAME:
 498                 case PDR_UTF8_PRODUCT_NAME:
 499                 case PDR_COUNTRY_LIST:
 500                 case PDR_DEFAULT_COUNTRY:
 501                 case PDR_ANTENNA_GAIN:
 502                 case PDR_PRISM_INDIGO_PA_CALIBRATION_DATA:
 503                 case PDR_REGULATORY_POWER_LIMITS:
 504                 case PDR_RADIATED_TRANSMISSION_CORRECTION:
 505                 case PDR_PRISM_TX_IQ_CALIBRATION:
 506                 case PDR_BASEBAND_REGISTERS:
 507                 case PDR_PER_CHANNEL_BASEBAND_REGISTERS:
 508                         break;
 509                 default:
 510                         printk(KERN_INFO "%s: unknown eeprom code : 0x%x\n",
 511                                 wiphy_name(dev->wiphy),
 512                                 le16_to_cpu(entry->code));
 513                         break;
 514                 }
 515
 516                 entry = (void *)entry + (entry_len + 1)*2;
 517         }
 518
 519         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 520             !priv->curve_data) {
 521                 printk(KERN_ERR "%s: not all required entries found in eeprom!\n",
 522                         wiphy_name(dev->wiphy));
 523                 err = -EINVAL;
 524                 goto err;
 525         }
 526
 527         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 528         if (priv->rxhw == 4)
 529                 p54_init_xbow_synth(dev);
 530         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 531                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 532         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 533                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
 534
 535         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 536                 u8 perm_addr[ETH_ALEN];
 537
 538                 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
 539                         wiphy_name(dev->wiphy));
 540                 random_ether_addr(perm_addr);
 541                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 542         }
 543
 544         printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
 545                 wiphy_name(dev->wiphy),
 546                 dev->wiphy->perm_addr,
 547                 priv->version, p54_rf_chips[priv->rxhw]);
 548
 549         return 0;
 550
 551   err:
 552         if (priv->iq_autocal) {
 553                 kfree(priv->iq_autocal);
 554                 priv->iq_autocal = NULL;
 555         }
 556
 557         if (priv->output_limit) {
 558                 kfree(priv->output_limit);
 559                 priv->output_limit = NULL;
 560         }
 561
 562         if (priv->curve_data) {
 563                 kfree(priv->curve_data);
 564                 priv->curve_data = NULL;
 565         }
 566
 567         printk(KERN_ERR "%s: eeprom parse failed!\n",
 568                 wiphy_name(dev->wiphy));
 569         return err;
 570 }
 571
 572 static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
 573 {
 574         struct p54_common *priv = dev->priv;
 575         int band = dev->conf.channel->band;
 576
 577         return ((rssi * priv->rssical_db[band].mul) / 64 +
 578                          priv->rssical_db[band].add) / 4;
 579 }
 580
 581 static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 582 {
 583         struct p54_common *priv = dev->priv;
 584         struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
 585         struct ieee80211_rx_status rx_status = {0};
 586         u16 freq = le16_to_cpu(hdr->freq);
 587         size_t header_len = sizeof(*hdr);
 588         u32 tsf32;
 589         u8 rate = hdr->rate & 0xf;
 590
 591         /*
 592          * If the device is in a unspecified state we have to
 593          * ignore all data frames. Else we could end up with a
 594          * nasty crash.
 595          */
 596         if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
 597                 return 0;
 598
 599         if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
 600                 if (priv->filter_flags & FIF_FCSFAIL)
 601                         rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 602                 else
 603                         return 0;
 604         }
 605
 606         if (hdr->decrypt_status == P54_DECRYPT_OK)
 607                 rx_status.flag |= RX_FLAG_DECRYPTED;
 608         if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
 609             (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
 610                 rx_status.flag |= RX_FLAG_MMIC_ERROR;
 611
 612         rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
 613         rx_status.noise = priv->noise;
 614         /* XX correct? */
 615         rx_status.qual = (100 * hdr->rssi) / 127;
 616         if (hdr->rate & 0x10)
 617                 rx_status.flag |= RX_FLAG_SHORTPRE;
 618         if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
 619                 rx_status.rate_idx = (rate < 4) ? 0 : rate - 4;
 620         else
 621                 rx_status.rate_idx = rate;
 622
 623         rx_status.freq = freq;
 624         rx_status.band =  dev->conf.channel->band;
 625         rx_status.antenna = hdr->antenna;
 626
 627         tsf32 = le32_to_cpu(hdr->tsf32);
 628         if (tsf32 < priv->tsf_low32)
 629                 priv->tsf_high32++;
 630         rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
 631         priv->tsf_low32 = tsf32;
 632
 633         rx_status.flag |= RX_FLAG_TSFT;
 634
 635         if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 636                 header_len += hdr->align[0];
 637
 638         skb_pull(skb, header_len);
 639         skb_trim(skb, le16_to_cpu(hdr->len));
 640
 641         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 642
 643         queue_delayed_work(dev->workqueue, &priv->work,
 644                            msecs_to_jiffies(P54_STATISTICS_UPDATE));
 645
 646         return -1;
 647 }
 648
 649 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 650 {
 651         struct p54_common *priv = dev->priv;
 652         int i;
 653
 654         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
 655                 return ;
 656
 657         for (i = 0; i < dev->queues; i++)
 658                 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
 659                         ieee80211_wake_queue(dev, i);
 660 }
 661
 662 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
 663 {
 664         struct p54_common *priv = dev->priv;
 665         struct ieee80211_tx_info *info;
 666         struct memrecord *range;
 667         unsigned long flags;
 668         u32 freed = 0, last_addr = priv->rx_start;
 669
 670         if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue)))
 671                 return;
 672
 673         /*
 674          * don't try to free an already unlinked skb
 675          */
 676         if (unlikely((!skb->next) || (!skb->prev)))
 677                 return;
 678
 679         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 680         info = IEEE80211_SKB_CB(skb);
 681         range = (void *)info->rate_driver_data;
 682         if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
 683                 struct ieee80211_tx_info *ni;
 684                 struct memrecord *mr;
 685
 686                 ni = IEEE80211_SKB_CB(skb->prev);
 687                 mr = (struct memrecord *)ni->rate_driver_data;
 688                 last_addr = mr->end_addr;
 689         }
 690         if (skb->next != (struct sk_buff *)&priv->tx_queue) {
 691                 struct ieee80211_tx_info *ni;
 692                 struct memrecord *mr;
 693
 694                 ni = IEEE80211_SKB_CB(skb->next);
 695                 mr = (struct memrecord *)ni->rate_driver_data;
 696                 freed = mr->start_addr - last_addr;
 697         } else
 698                 freed = priv->rx_end - last_addr;
 699         __skb_unlink(skb, &priv->tx_queue);
 700         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 701         dev_kfree_skb_any(skb);
 702
 703         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 704                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 705                 p54_wake_free_queues(dev);
 706 }
 707 EXPORT_SYMBOL_GPL(p54_free_skb);
 708
 709 static struct sk_buff *p54_find_tx_entry(struct ieee80211_hw *dev,
 710                                            __le32 req_id)
 711 {
 712         struct p54_common *priv = dev->priv;
 713         struct sk_buff *entry;
 714         unsigned long flags;
 715
 716         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 717         entry = priv->tx_queue.next;
 718         while (entry != (struct sk_buff *)&priv->tx_queue) {
 719                 struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
 720
 721                 if (hdr->req_id == req_id) {
 722                         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 723                         return entry;
 724                 }
 725                 entry = entry->next;
 726         }
 727         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 728         return NULL;
 729 }
 730
 731 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 732 {
 733         struct p54_common *priv = dev->priv;
 734         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 735         struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
 736         struct sk_buff *entry;
 737         u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
 738         struct memrecord *range = NULL;
 739         u32 freed = 0;
 740         u32 last_addr = priv->rx_start;
 741         unsigned long flags;
 742         int count, idx;
 743
 744         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 745         entry = (struct sk_buff *) priv->tx_queue.next;
 746         while (entry != (struct sk_buff *)&priv->tx_queue) {
 747                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 748                 struct p54_hdr *entry_hdr;
 749                 struct p54_tx_data *entry_data;
 750                 unsigned int pad = 0, frame_len;
 751
 752                 range = (void *)info->rate_driver_data;
 753                 if (range->start_addr != addr) {
 754                         last_addr = range->end_addr;
 755                         entry = entry->next;
 756                         continue;
 757                 }
 758
 759                 if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 760                         struct ieee80211_tx_info *ni;
 761                         struct memrecord *mr;
 762
 763                         ni = IEEE80211_SKB_CB(entry->next);
 764                         mr = (struct memrecord *)ni->rate_driver_data;
 765                         freed = mr->start_addr - last_addr;
 766                 } else
 767                         freed = priv->rx_end - last_addr;
 768
 769                 last_addr = range->end_addr;
 770                 __skb_unlink(entry, &priv->tx_queue);
 771                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 772
 773                 frame_len = entry->len;
 774                 entry_hdr = (struct p54_hdr *) entry->data;
 775                 entry_data = (struct p54_tx_data *) entry_hdr->data;
 776                 priv->tx_stats[entry_data->hw_queue].len--;
 777                 priv->stats.dot11ACKFailureCount += payload->tries - 1;
 778
 779                 if (unlikely(entry == priv->cached_beacon)) {
 780                         kfree_skb(entry);
 781                         priv->cached_beacon = NULL;
 782                         goto out;
 783                 }
 784
 785                 /*
 786                  * Clear manually, ieee80211_tx_info_clear_status would
 787                  * clear the counts too and we need them.
 788                  */
 789                 memset(&info->status.ampdu_ack_len, 0,
 790                        sizeof(struct ieee80211_tx_info) -
 791                        offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
 792                 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
 793                                       status.ampdu_ack_len) != 23);
 794
 795                 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 796                         pad = entry_data->align[0];
 797
 798                 /* walk through the rates array and adjust the counts */
 799                 count = payload->tries;
 800                 for (idx = 0; idx < 4; idx++) {
 801                         if (count >= info->status.rates[idx].count) {
 802                                 count -= info->status.rates[idx].count;
 803                         } else if (count > 0) {
 804                                 info->status.rates[idx].count = count;
 805                                 count = 0;
 806                         } else {
 807                                 info->status.rates[idx].idx = -1;
 808                                 info->status.rates[idx].count = 0;
 809                         }
 810                 }
 811
 812                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
 813                      (!payload->status))
 814                         info->flags |= IEEE80211_TX_STAT_ACK;
 815                 if (payload->status & P54_TX_PSM_CANCELLED)
 816                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
 817                 info->status.ack_signal = p54_rssi_to_dbm(dev,
 818                                 (int)payload->ack_rssi);
 819
 820                 /* Undo all changes to the frame. */
 821                 switch (entry_data->key_type) {
 822                 case P54_CRYPTO_TKIPMICHAEL: {
 823                         u8 *iv = (u8 *)(entry_data->align + pad +
 824                                         entry_data->crypt_offset);
 825
 826                         /* Restore the original TKIP IV. */
 827                         iv[2] = iv[0];
 828                         iv[0] = iv[1];
 829                         iv[1] = (iv[0] | 0x20) & 0x7f;  /* WEPSeed - 8.3.2.2 */
 830
 831                         frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
 832                         break;
 833                         }
 834                 case P54_CRYPTO_AESCCMP:
 835                         frame_len -= 8; /* remove CCMP_MIC */
 836                         break;
 837                 case P54_CRYPTO_WEP:
 838                         frame_len -= 4; /* remove WEP_ICV */
 839                         break;
 840                 }
 841                 skb_trim(entry, frame_len);
 842                 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 843                 ieee80211_tx_status_irqsafe(dev, entry);
 844                 goto out;
 845         }
 846         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 847
 848 out:
 849         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 850                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 851                 p54_wake_free_queues(dev);
 852 }
 853
 854 static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
 855                                    struct sk_buff *skb)
 856 {
 857         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 858         struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
 859         struct p54_common *priv = dev->priv;
 860
 861         if (!priv->eeprom)
 862                 return ;
 863
 864         if (priv->fw_var >= 0x509) {
 865                 memcpy(priv->eeprom, eeprom->v2.data,
 866                        le16_to_cpu(eeprom->v2.len));
 867         } else {
 868                 memcpy(priv->eeprom, eeprom->v1.data,
 869                        le16_to_cpu(eeprom->v1.len));
 870         }
 871
 872         complete(&priv->eeprom_comp);
 873 }
 874
 875 static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
 876 {
 877         struct p54_common *priv = dev->priv;
 878         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 879         struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
 880         u32 tsf32;
 881
 882         if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
 883                 return ;
 884
 885         tsf32 = le32_to_cpu(stats->tsf32);
 886         if (tsf32 < priv->tsf_low32)
 887                 priv->tsf_high32++;
 888         priv->tsf_low32 = tsf32;
 889
 890         priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
 891         priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
 892         priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
 893
 894         priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
 895
 896         p54_free_skb(dev, p54_find_tx_entry(dev, hdr->req_id));
 897 }
 898
 899 static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb)
 900 {
 901         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 902         struct p54_trap *trap = (struct p54_trap *) hdr->data;
 903         u16 event = le16_to_cpu(trap->event);
 904         u16 freq = le16_to_cpu(trap->frequency);
 905
 906         switch (event) {
 907         case P54_TRAP_BEACON_TX:
 908                 break;
 909         case P54_TRAP_RADAR:
 910                 printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
 911                         wiphy_name(dev->wiphy), freq);
 912                 break;
 913         case P54_TRAP_NO_BEACON:
 914                 break;
 915         case P54_TRAP_SCAN:
 916                 break;
 917         case P54_TRAP_TBTT:
 918                 break;
 919         case P54_TRAP_TIMER:
 920                 break;
 921         default:
 922                 printk(KERN_INFO "%s: received event:%x freq:%d\n",
 923                        wiphy_name(dev->wiphy), event, freq);
 924                 break;
 925         }
 926 }
 927
 928 static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 929 {
 930         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 931
 932         switch (le16_to_cpu(hdr->type)) {
 933         case P54_CONTROL_TYPE_TXDONE:
 934                 p54_rx_frame_sent(dev, skb);
 935                 break;
 936         case P54_CONTROL_TYPE_TRAP:
 937                 p54_rx_trap(dev, skb);
 938                 break;
 939         case P54_CONTROL_TYPE_BBP:
 940                 break;
 941         case P54_CONTROL_TYPE_STAT_READBACK:
 942                 p54_rx_stats(dev, skb);
 943                 break;
 944         case P54_CONTROL_TYPE_EEPROM_READBACK:
 945                 p54_rx_eeprom_readback(dev, skb);
 946                 break;
 947         default:
 948                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 949                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 950                 break;
 951         }
 952
 953         return 0;
 954 }
 955
 956 /* returns zero if skb can be reused */
 957 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 958 {
 959         u16 type = le16_to_cpu(*((__le16 *)skb->data));
 960
 961         if (type & P54_HDR_FLAG_CONTROL)
 962                 return p54_rx_control(dev, skb);
 963         else
 964                 return p54_rx_data(dev, skb);
 965 }
 966 EXPORT_SYMBOL_GPL(p54_rx);
 967
 968 /*
 969  * So, the firmware is somewhat stupid and doesn't know what places in its
 970  * memory incoming data should go to. By poking around in the firmware, we
 971  * can find some unused memory to upload our packets to. However, data that we
 972  * want the card to TX needs to stay intact until the card has told us that
 973  * it is done with it. This function finds empty places we can upload to and
 974  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 975  * allocated areas.
 976  */
 977 static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 978                                struct p54_hdr *data, u32 len)
 979 {
 980         struct p54_common *priv = dev->priv;
 981         struct sk_buff *entry;
 982         struct sk_buff *target_skb = NULL;
 983         struct ieee80211_tx_info *info;
 984         struct memrecord *range;
 985         u32 last_addr = priv->rx_start;
 986         u32 largest_hole = 0;
 987         u32 target_addr = priv->rx_start;
 988         unsigned long flags;
 989         unsigned int left;
 990         len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
 991
 992         if (!skb)
 993                 return -EINVAL;
 994
 995         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 996
 997         left = skb_queue_len(&priv->tx_queue);
 998         if (unlikely(left >= 28)) {
 999                 /*
1000                  * The tx_queue is nearly full!
1001                  * We have throttle normal data traffic, because we must
1002                  * have a few spare slots for control frames left.
1003                  */
1004                 ieee80211_stop_queues(dev);
1005                 queue_delayed_work(dev->workqueue, &priv->work,
1006                                    msecs_to_jiffies(P54_TX_TIMEOUT));
1007
1008                 if (unlikely(left == 32)) {
1009                         /*
1010                          * The tx_queue is now really full.
1011                          *
1012                          * TODO: check if the device has crashed and reset it.
1013                          */
1014                         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
1015                         return -ENOSPC;
1016                 }
1017         }
1018
1019         entry = priv->tx_queue.next;
1020         while (left--) {
1021                 u32 hole_size;
1022                 info = IEEE80211_SKB_CB(entry);
1023                 range = (void *)info->rate_driver_data;
1024                 hole_size = range->start_addr - last_addr;
1025                 if (!target_skb && hole_size >= len) {
1026                         target_skb = entry->prev;
1027                         hole_size -= len;
1028                         target_addr = last_addr;
1029                 }
1030                 largest_hole = max(largest_hole, hole_size);
1031                 last_addr = range->end_addr;
1032                 entry = entry->next;
1033         }
1034         if (!target_skb && priv->rx_end - last_addr >= len) {
1035                 target_skb = priv->tx_queue.prev;
1036                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
1037                 if (!skb_queue_empty(&priv->tx_queue)) {
1038                         info = IEEE80211_SKB_CB(target_skb);
1039                         range = (void *)info->rate_driver_data;
1040                         target_addr = range->end_addr;
1041                 }
1042         } else
1043                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
1044
1045         if (!target_skb) {
1046                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
1047                 ieee80211_stop_queues(dev);
1048                 return -ENOSPC;
1049         }
1050
1051         info = IEEE80211_SKB_CB(skb);
1052         range = (void *)info->rate_driver_data;
1053         range->start_addr = target_addr;
1054         range->end_addr = target_addr + len;
1055         __skb_queue_after(&priv->tx_queue, target_skb, skb);
1056         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
1057
1058         if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
1059                            48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
1060                 ieee80211_stop_queues(dev);
1061
1062         data->req_id = cpu_to_le32(target_addr + priv->headroom);
1063         return 0;
1064 }
1065
1066 static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
1067                 u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
1068 {
1069         struct p54_common *priv = dev->priv;
1070         struct p54_hdr *hdr;
1071         struct sk_buff *skb;
1072
1073         skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
1074         if (!skb)
1075                 return NULL;
1076         skb_reserve(skb, priv->tx_hdr_len);
1077
1078         hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
1079         hdr->flags = cpu_to_le16(hdr_flags);
1080         hdr->len = cpu_to_le16(len - sizeof(*hdr));
1081         hdr->type = cpu_to_le16(type);
1082         hdr->tries = hdr->rts_tries = 0;
1083
1084         if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
1085                 kfree_skb(skb);
1086                 return NULL;
1087         }
1088         return skb;
1089 }
1090
1091 int p54_read_eeprom(struct ieee80211_hw *dev)
1092 {
1093         struct p54_common *priv = dev->priv;
1094         struct p54_hdr *hdr = NULL;
1095         struct p54_eeprom_lm86 *eeprom_hdr;
1096         struct sk_buff *skb;
1097         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
1098         int ret = -ENOMEM;
1099         void *eeprom = NULL;
1100
1101         maxblocksize = EEPROM_READBACK_LEN;
1102         if (priv->fw_var >= 0x509)
1103                 maxblocksize -= 0xc;
1104         else
1105                 maxblocksize -= 0x4;
1106
1107         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(*hdr) +
1108                             sizeof(*eeprom_hdr) + maxblocksize,
1109                             P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
1110         if (!skb)
1111                 goto free;
1112         priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
1113         if (!priv->eeprom)
1114                 goto free;
1115         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
1116         if (!eeprom)
1117                 goto free;
1118
1119         eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
1120                      sizeof(*eeprom_hdr) + maxblocksize);
1121
1122         while (eeprom_size) {
1123                 blocksize = min(eeprom_size, maxblocksize);
1124                 if (priv->fw_var < 0x509) {
1125                         eeprom_hdr->v1.offset = cpu_to_le16(offset);
1126                         eeprom_hdr->v1.len = cpu_to_le16(blocksize);
1127                 } else {
1128                         eeprom_hdr->v2.offset = cpu_to_le32(offset);
1129                         eeprom_hdr->v2.len = cpu_to_le16(blocksize);
1130                         eeprom_hdr->v2.magic2 = 0xf;
1131                         memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4);
1132                 }
1133                 priv->tx(dev, skb);
1134
1135                 if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
1136                         printk(KERN_ERR "%s: device does not respond!\n",
1137                                 wiphy_name(dev->wiphy));
1138                         ret = -EBUSY;
1139                         goto free;
1140                 }
1141
1142                 memcpy(eeprom + offset, priv->eeprom, blocksize);
1143                 offset += blocksize;
1144                 eeprom_size -= blocksize;
1145         }
1146
1147         ret = p54_parse_eeprom(dev, eeprom, offset);
1148 free:
1149         kfree(priv->eeprom);
1150         priv->eeprom = NULL;
1151         p54_free_skb(dev, skb);
1152         kfree(eeprom);
1153
1154         return ret;
1155 }
1156 EXPORT_SYMBOL_GPL(p54_read_eeprom);
1157
1158 static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
1159                 bool set)
1160 {
1161         struct p54_common *priv = dev->priv;
1162         struct sk_buff *skb;
1163         struct p54_tim *tim;
1164
1165         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
1166                       sizeof(struct p54_hdr) + sizeof(*tim),
1167                       P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
1168         if (!skb)
1169                 return -ENOMEM;
1170
1171         tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
1172         tim->count = 1;
1173         tim->entry[0] = cpu_to_le16(set ? (sta->aid | 0x8000) : sta->aid);
1174         priv->tx(dev, skb);
1175         return 0;
1176 }
1177
1178 static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr)
1179 {
1180         struct p54_common *priv = dev->priv;
1181         struct sk_buff *skb;
1182         struct p54_sta_unlock *sta;
1183
1184         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
1185                 sizeof(struct p54_hdr) + sizeof(*sta),
1186                 P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
1187         if (!skb)
1188                 return -ENOMEM;
1189
1190         sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
1191         memcpy(sta->addr, addr, ETH_ALEN);
1192         priv->tx(dev, skb);
1193         return 0;
1194 }
1195
1196 static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
1197                               enum sta_notify_cmd notify_cmd,
1198                               struct ieee80211_sta *sta)
1199 {
1200         switch (notify_cmd) {
1201         case STA_NOTIFY_ADD:
1202         case STA_NOTIFY_REMOVE:
1203                 /*
1204                  * Notify the firmware that we don't want or we don't
1205                  * need to buffer frames for this station anymore.
1206                  */
1207
1208                 p54_sta_unlock(dev, sta->addr);
1209                 break;
1210         case STA_NOTIFY_AWAKE:
1211                 /* update the firmware's filter table */
1212                 p54_sta_unlock(dev, sta->addr);
1213                 break;
1214         default:
1215                 break;
1216         }
1217 }
1218
1219 static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry)
1220 {
1221         struct p54_common *priv = dev->priv;
1222         struct sk_buff *skb;
1223         struct p54_hdr *hdr;
1224         struct p54_txcancel *cancel;
1225
1226         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
1227                 sizeof(struct p54_hdr) + sizeof(*cancel),
1228                 P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
1229         if (!skb)
1230                 return -ENOMEM;
1231
1232         hdr = (void *)entry->data;
1233         cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
1234         cancel->req_id = hdr->req_id;
1235         priv->tx(dev, skb);
1236         return 0;
1237 }
1238
1239 static int p54_tx_fill(struct ieee80211_hw *dev, struct sk_buff *skb,
1240                 struct ieee80211_tx_info *info, u8 *queue, size_t *extra_len,
1241                 u16 *flags, u16 *aid)
1242 {
1243         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1244         struct p54_common *priv = dev->priv;
1245         int ret = 0;
1246
1247         if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
1248                 if (ieee80211_is_beacon(hdr->frame_control)) {
1249                         *aid = 0;
1250                         *queue = 0;
1251                         *extra_len = IEEE80211_MAX_TIM_LEN;
1252                         *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
1253                         return 0;
1254                 } else if (ieee80211_is_probe_resp(hdr->frame_control)) {
1255                         *aid = 0;
1256                         *queue = 2;
1257                         *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
1258                                  P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1259                         return 0;
1260                 } else {
1261                         *queue = 2;
1262                         ret = 0;
1263                 }
1264         } else {
1265                 *queue += 4;
1266                 ret = 1;
1267         }
1268
1269         switch (priv->mode) {
1270         case NL80211_IFTYPE_STATION:
1271                 *aid = 1;
1272                 break;
1273         case NL80211_IFTYPE_AP:
1274         case NL80211_IFTYPE_ADHOC:
1275         case NL80211_IFTYPE_MESH_POINT:
1276                 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
1277                         *aid = 0;
1278                         *queue = 3;
1279                         return 0;
1280                 }
1281                 if (info->control.sta)
1282                         *aid = info->control.sta->aid;
1283                 else
1284                         *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
1285         }
1286         return ret;
1287 }
1288
1289 static u8 p54_convert_algo(enum ieee80211_key_alg alg)
1290 {
1291         switch (alg) {
1292         case ALG_WEP:
1293                 return P54_CRYPTO_WEP;
1294         case ALG_TKIP:
1295                 return P54_CRYPTO_TKIPMICHAEL;
1296         case ALG_CCMP:
1297                 return P54_CRYPTO_AESCCMP;
1298         default:
1299                 return 0;
1300         }
1301 }
1302
1303 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
1304 {
1305         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1306         struct ieee80211_tx_queue_stats *current_queue = NULL;
1307         struct p54_common *priv = dev->priv;
1308         struct p54_hdr *hdr;
1309         struct p54_tx_data *txhdr;
1310         size_t padding, len, tim_len = 0;
1311         int i, j, ridx, ret;
1312         u16 hdr_flags = 0, aid = 0;
1313         u8 rate, queue, crypt_offset = 0;
1314         u8 cts_rate = 0x20;
1315         u8 rc_flags;
1316         u8 calculated_tries[4];
1317         u8 nrates = 0, nremaining = 8;
1318
1319         queue = skb_get_queue_mapping(skb);
1320
1321         ret = p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid);
1322         current_queue = &priv->tx_stats[queue];
1323         if (unlikely((current_queue->len > current_queue->limit) && ret))
1324                 return NETDEV_TX_BUSY;
1325         current_queue->len++;
1326         current_queue->count++;
1327         if ((current_queue->len == current_queue->limit) && ret)
1328                 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
1329
1330         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
1331         len = skb->len;
1332
1333         if (info->control.hw_key) {
1334                 crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
1335                 if (info->control.hw_key->alg == ALG_TKIP) {
1336                         u8 *iv = (u8 *)(skb->data + crypt_offset);
1337                         /*
1338                          * The firmware excepts that the IV has to have
1339                          * this special format
1340                          */
1341                         iv[1] = iv[0];
1342                         iv[0] = iv[2];
1343                         iv[2] = 0;
1344                 }
1345         }
1346
1347         txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
1348         hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
1349
1350         if (padding)
1351                 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
1352         hdr->type = cpu_to_le16(aid);
1353         hdr->rts_tries = info->control.rates[0].count;
1354
1355         /*
1356          * we register the rates in perfect order, and
1357          * RTS/CTS won't happen on 5 GHz
1358          */
1359         cts_rate = info->control.rts_cts_rate_idx;
1360
1361         memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
1362
1363         /* see how many rates got used */
1364         for (i = 0; i < 4; i++) {
1365                 if (info->control.rates[i].idx < 0)
1366                         break;
1367                 nrates++;
1368         }
1369
1370         /* limit tries to 8/nrates per rate */
1371         for (i = 0; i < nrates; i++) {
1372                 /*
1373                  * The magic expression here is equivalent to 8/nrates for
1374                  * all values that matter, but avoids division and jumps.
1375                  * Note that nrates can only take the values 1 through 4.
1376                  */
1377                 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
1378                                                  info->control.rates[i].count);
1379                 nremaining -= calculated_tries[i];
1380         }
1381
1382         /* if there are tries left, distribute from back to front */
1383         for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
1384                 int tmp = info->control.rates[i].count - calculated_tries[i];
1385
1386                 if (tmp <= 0)
1387                         continue;
1388                 /* RC requested more tries at this rate */
1389
1390                 tmp = min_t(int, tmp, nremaining);
1391                 calculated_tries[i] += tmp;
1392                 nremaining -= tmp;
1393         }
1394
1395         ridx = 0;
1396         for (i = 0; i < nrates && ridx < 8; i++) {
1397                 /* we register the rates in perfect order */
1398                 rate = info->control.rates[i].idx;
1399                 if (info->band == IEEE80211_BAND_5GHZ)
1400                         rate += 4;
1401
1402                 /* store the count we actually calculated for TX status */
1403                 info->control.rates[i].count = calculated_tries[i];
1404
1405                 rc_flags = info->control.rates[i].flags;
1406                 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
1407                         rate |= 0x10;
1408                         cts_rate |= 0x10;
1409                 }
1410                 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
1411                         rate |= 0x40;
1412                 else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1413                         rate |= 0x20;
1414                 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
1415                         txhdr->rateset[ridx] = rate;
1416                         ridx++;
1417                 }
1418         }
1419
1420         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
1421                 hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
1422
1423         /* TODO: enable bursting */
1424         hdr->flags = cpu_to_le16(hdr_flags);
1425         hdr->tries = ridx;
1426         txhdr->rts_rate_idx = 0;
1427         if (info->control.hw_key) {
1428                 txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
1429                 txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
1430                 memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
1431                 if (info->control.hw_key->alg == ALG_TKIP) {
1432                         if (unlikely(skb_tailroom(skb) < 12))
1433                                 goto err;
1434                         /* reserve space for the MIC key */
1435                         len += 8;
1436                         memcpy(skb_put(skb, 8), &(info->control.hw_key->key
1437                                 [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
1438                 }
1439                 /* reserve some space for ICV */
1440                 len += info->control.hw_key->icv_len;
1441                 memset(skb_put(skb, info->control.hw_key->icv_len), 0,
1442                        info->control.hw_key->icv_len);
1443         } else {
1444                 txhdr->key_type = 0;
1445                 txhdr->key_len = 0;
1446         }
1447         txhdr->crypt_offset = crypt_offset;
1448         txhdr->hw_queue = queue;
1449         if (current_queue)
1450                 txhdr->backlog = current_queue->len;
1451         else
1452                 txhdr->backlog = 0;
1453         memset(txhdr->durations, 0, sizeof(txhdr->durations));
1454         txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
1455                 2 : info->antenna_sel_tx - 1;
1456         txhdr->output_power = priv->output_power;
1457         txhdr->cts_rate = cts_rate;
1458         if (padding)
1459                 txhdr->align[0] = padding;
1460
1461         hdr->len = cpu_to_le16(len);
1462         /* modifies skb->cb and with it info, so must be last! */
1463         if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len)))
1464                 goto err;
1465         priv->tx(dev, skb);
1466
1467         queue_delayed_work(dev->workqueue, &priv->work,
1468                            msecs_to_jiffies(P54_TX_FRAME_LIFETIME));
1469
1470         return 0;
1471
1472  err:
1473         skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
1474         if (current_queue) {
1475                 current_queue->len--;
1476                 current_queue->count--;
1477         }
1478         return NETDEV_TX_BUSY;
1479 }
1480
1481 static int p54_setup_mac(struct ieee80211_hw *dev)
1482 {
1483         struct p54_common *priv = dev->priv;
1484         struct sk_buff *skb;
1485         struct p54_setup_mac *setup;
1486         u16 mode;
1487
1488         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
1489                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
1490                             GFP_ATOMIC);
1491         if (!skb)
1492                 return -ENOMEM;
1493
1494         setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
1495         if (dev->conf.radio_enabled) {
1496                 switch (priv->mode) {
1497                 case NL80211_IFTYPE_STATION:
1498                         mode = P54_FILTER_TYPE_STATION;
1499                         break;
1500                 case NL80211_IFTYPE_AP:
1501                         mode = P54_FILTER_TYPE_AP;
1502                         break;
1503                 case NL80211_IFTYPE_ADHOC:
1504                 case NL80211_IFTYPE_MESH_POINT:
1505                         mode = P54_FILTER_TYPE_IBSS;
1506                         break;
1507                 default:
1508                         mode = P54_FILTER_TYPE_NONE;
1509                         break;
1510                 }
1511                 if (priv->filter_flags & FIF_PROMISC_IN_BSS)
1512                         mode |= P54_FILTER_TYPE_TRANSPARENT;
1513         } else
1514                 mode = P54_FILTER_TYPE_RX_DISABLED;
1515
1516         setup->mac_mode = cpu_to_le16(mode);
1517         memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
1518         memcpy(setup->bssid, priv->bssid, ETH_ALEN);
1519         setup->rx_antenna = 2; /* automatic */
1520         setup->rx_align = 0;
1521         if (priv->fw_var < 0x500) {
1522                 setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1523                 memset(setup->v1.rts_rates, 0, 8);
1524                 setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
1525                 setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
1526                 setup->v1.rxhw = cpu_to_le16(priv->rxhw);
1527                 setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
1528                 setup->v1.unalloc0 = cpu_to_le16(0);
1529         } else {
1530                 setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
1531                 setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
1532                 setup->v2.rxhw = cpu_to_le16(priv->rxhw);
1533                 setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
1534                 setup->v2.truncate = cpu_to_le16(48896);
1535                 setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1536                 setup->v2.sbss_offset = 0;
1537                 setup->v2.mcast_window = 0;
1538                 setup->v2.rx_rssi_threshold = 0;
1539                 setup->v2.rx_ed_threshold = 0;
1540                 setup->v2.ref_clock = cpu_to_le32(644245094);
1541                 setup->v2.lpf_bandwidth = cpu_to_le16(65535);
1542                 setup->v2.osc_start_delay = cpu_to_le16(65535);
1543         }
1544         priv->tx(dev, skb);
1545         return 0;
1546 }
1547
1548 static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell)
1549 {
1550         struct p54_common *priv = dev->priv;
1551         struct sk_buff *skb;
1552         struct p54_scan *chan;
1553         unsigned int i;
1554         void *entry;
1555         __le16 freq = cpu_to_le16(dev->conf.channel->center_freq);
1556         int band = dev->conf.channel->band;
1557
1558         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
1559                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
1560                             GFP_ATOMIC);
1561         if (!skb)
1562                 return -ENOMEM;
1563
1564         chan = (struct p54_scan *) skb_put(skb, sizeof(*chan));
1565         memset(chan->padding1, 0, sizeof(chan->padding1));
1566         chan->mode = cpu_to_le16(mode);
1567         chan->dwell = cpu_to_le16(dwell);
1568
1569         for (i = 0; i < priv->iq_autocal_len; i++) {
1570                 if (priv->iq_autocal[i].freq != freq)
1571                         continue;
1572
1573                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
1574                        sizeof(*priv->iq_autocal));
1575                 break;
1576         }
1577         if (i == priv->iq_autocal_len)
1578                 goto err;
1579
1580         for (i = 0; i < priv->output_limit_len; i++) {
1581                 if (priv->output_limit[i].freq != freq)
1582                         continue;
1583
1584                 chan->val_barker = 0x38;
1585                 chan->val_bpsk = chan->dup_bpsk =
1586                         priv->output_limit[i].val_bpsk;
1587                 chan->val_qpsk = chan->dup_qpsk =
1588                         priv->output_limit[i].val_qpsk;
1589                 chan->val_16qam = chan->dup_16qam =
1590                         priv->output_limit[i].val_16qam;
1591                 chan->val_64qam = chan->dup_64qam =
1592                         priv->output_limit[i].val_64qam;
1593                 break;
1594         }
1595         if (i == priv->output_limit_len)
1596                 goto err;
1597
1598         entry = priv->curve_data->data;
1599         for (i = 0; i < priv->curve_data->channels; i++) {
1600                 if (*((__le16 *)entry) != freq) {
1601                         entry += sizeof(__le16);
1602                         entry += sizeof(struct p54_pa_curve_data_sample) *
1603                                  priv->curve_data->points_per_channel;
1604                         continue;
1605                 }
1606
1607                 entry += sizeof(__le16);
1608                 chan->pa_points_per_curve = 8;
1609                 memset(chan->curve_data, 0, sizeof(*chan->curve_data));
1610                 memcpy(chan->curve_data, entry,
1611                        sizeof(struct p54_pa_curve_data_sample) *
1612                        min((u8)8, priv->curve_data->points_per_channel));
1613                 break;
1614         }
1615
1616         if (priv->fw_var < 0x500) {
1617                 chan->v1_rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
1618                 chan->v1_rssi.add = cpu_to_le16(priv->rssical_db[band].add);
1619         } else {
1620                 chan->v2.rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
1621                 chan->v2.rssi.add = cpu_to_le16(priv->rssical_db[band].add);
1622                 chan->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
1623                 memset(chan->v2.rts_rates, 0, 8);
1624         }
1625         priv->tx(dev, skb);
1626         return 0;
1627
1628  err:
1629         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
1630         p54_free_skb(dev, skb);
1631         return -EINVAL;
1632 }
1633
1634 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
1635 {
1636         struct p54_common *priv = dev->priv;
1637         struct sk_buff *skb;
1638         struct p54_led *led;
1639
1640         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
1641                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
1642                         GFP_ATOMIC);
1643         if (!skb)
1644                 return -ENOMEM;
1645
1646         led = (struct p54_led *)skb_put(skb, sizeof(*led));
1647         led->mode = cpu_to_le16(mode);
1648         led->led_permanent = cpu_to_le16(link);
1649         led->led_temporary = cpu_to_le16(act);
1650         led->duration = cpu_to_le16(1000);
1651         priv->tx(dev, skb);
1652         return 0;
1653 }
1654
1655 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
1656 do {                                                            \
1657         queue.aifs = cpu_to_le16(ai_fs);                        \
1658         queue.cwmin = cpu_to_le16(cw_min);                      \
1659         queue.cwmax = cpu_to_le16(cw_max);                      \
1660         queue.txop = cpu_to_le16(_txop);                        \
1661 } while(0)
1662
1663 static int p54_set_edcf(struct ieee80211_hw *dev)
1664 {
1665         struct p54_common *priv = dev->priv;
1666         struct sk_buff *skb;
1667         struct p54_edcf *edcf;
1668
1669         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
1670                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
1671                         GFP_ATOMIC);
1672         if (!skb)
1673                 return -ENOMEM;
1674
1675         edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
1676         if (priv->use_short_slot) {
1677                 edcf->slottime = 9;
1678                 edcf->sifs = 0x10;
1679                 edcf->eofpad = 0x00;
1680         } else {
1681                 edcf->slottime = 20;
1682                 edcf->sifs = 0x0a;
1683                 edcf->eofpad = 0x06;
1684         }
1685         /* (see prism54/isl_oid.h for further details) */
1686         edcf->frameburst = cpu_to_le16(0);
1687         edcf->round_trip_delay = cpu_to_le16(0);
1688         edcf->flags = 0;
1689         memset(edcf->mapping, 0, sizeof(edcf->mapping));
1690         memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
1691         priv->tx(dev, skb);
1692         return 0;
1693 }
1694
1695 static int p54_beacon_tim(struct sk_buff *skb)
1696 {
1697         /*
1698          * the good excuse for this mess is ... the firmware.
1699          * The dummy TIM MUST be at the end of the beacon frame,
1700          * because it'll be overwritten!
1701          */
1702
1703         struct ieee80211_mgmt *mgmt = (void *)skb->data;
1704         u8 *pos, *end;
1705
1706         if (skb->len <= sizeof(mgmt))
1707                 return -EINVAL;
1708
1709         pos = (u8 *)mgmt->u.beacon.variable;
1710         end = skb->data + skb->len;
1711         while (pos < end) {
1712                 if (pos + 2 + pos[1] > end)
1713                         return -EINVAL;
1714
1715                 if (pos[0] == WLAN_EID_TIM) {
1716                         u8 dtim_len = pos[1];
1717                         u8 dtim_period = pos[3];
1718                         u8 *next = pos + 2 + dtim_len;
1719
1720                         if (dtim_len < 3)
1721                                 return -EINVAL;
1722
1723                         memmove(pos, next, end - next);
1724
1725                         if (dtim_len > 3)
1726                                 skb_trim(skb, skb->len - (dtim_len - 3));
1727
1728                         pos = end - (dtim_len + 2);
1729
1730                         /* add the dummy at the end */
1731                         pos[0] = WLAN_EID_TIM;
1732                         pos[1] = 3;
1733                         pos[2] = 0;
1734                         pos[3] = dtim_period;
1735                         pos[4] = 0;
1736                         return 0;
1737                 }
1738                 pos += 2 + pos[1];
1739         }
1740         return 0;
1741 }
1742
1743 static int p54_beacon_update(struct ieee80211_hw *dev,
1744                         struct ieee80211_vif *vif)
1745 {
1746         struct p54_common *priv = dev->priv;
1747         struct sk_buff *beacon;
1748         int ret;
1749
1750         if (priv->cached_beacon) {
1751                 p54_tx_cancel(dev, priv->cached_beacon);
1752                 /* wait for the last beacon the be freed */
1753                 msleep(10);
1754         }
1755
1756         beacon = ieee80211_beacon_get(dev, vif);
1757         if (!beacon)
1758                 return -ENOMEM;
1759         ret = p54_beacon_tim(beacon);
1760         if (ret)
1761                 return ret;
1762         ret = p54_tx(dev, beacon);
1763         if (ret)
1764                 return ret;
1765         priv->cached_beacon = beacon;
1766         priv->tsf_high32 = 0;
1767         priv->tsf_low32 = 0;
1768
1769         return 0;
1770 }
1771
1772 static int p54_start(struct ieee80211_hw *dev)
1773 {
1774         struct p54_common *priv = dev->priv;
1775         int err;
1776
1777         mutex_lock(&priv->conf_mutex);
1778         err = priv->open(dev);
1779         if (err)
1780                 goto out;
1781         P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
1782         P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
1783         P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
1784         P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
1785         err = p54_set_edcf(dev);
1786         if (err)
1787                 goto out;
1788
1789         memset(priv->bssid, ~0, ETH_ALEN);
1790         priv->mode = NL80211_IFTYPE_MONITOR;
1791         err = p54_setup_mac(dev);
1792         if (err) {
1793                 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1794                 goto out;
1795         }
1796
1797         queue_delayed_work(dev->workqueue, &priv->work, 0);
1798
1799 out:
1800         mutex_unlock(&priv->conf_mutex);
1801         return err;
1802 }
1803
1804 static void p54_stop(struct ieee80211_hw *dev)
1805 {
1806         struct p54_common *priv = dev->priv;
1807         struct sk_buff *skb;
1808
1809         mutex_lock(&priv->conf_mutex);
1810         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1811         cancel_delayed_work_sync(&priv->work);
1812         if (priv->cached_beacon)
1813                 p54_tx_cancel(dev, priv->cached_beacon);
1814
1815         priv->stop(dev);
1816         while ((skb = skb_dequeue(&priv->tx_queue)))
1817                 kfree_skb(skb);
1818         priv->cached_beacon = NULL;
1819         priv->tsf_high32 = priv->tsf_low32 = 0;
1820         mutex_unlock(&priv->conf_mutex);
1821 }
1822
1823 static int p54_add_interface(struct ieee80211_hw *dev,
1824                              struct ieee80211_if_init_conf *conf)
1825 {
1826         struct p54_common *priv = dev->priv;
1827
1828         mutex_lock(&priv->conf_mutex);
1829         if (priv->mode != NL80211_IFTYPE_MONITOR) {
1830                 mutex_unlock(&priv->conf_mutex);
1831                 return -EOPNOTSUPP;
1832         }
1833
1834         switch (conf->type) {
1835         case NL80211_IFTYPE_STATION:
1836         case NL80211_IFTYPE_ADHOC:
1837         case NL80211_IFTYPE_AP:
1838         case NL80211_IFTYPE_MESH_POINT:
1839                 priv->mode = conf->type;
1840                 break;
1841         default:
1842                 mutex_unlock(&priv->conf_mutex);
1843                 return -EOPNOTSUPP;
1844         }
1845
1846         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1847         p54_setup_mac(dev);
1848         p54_set_leds(dev, 1, 0, 0);
1849         mutex_unlock(&priv->conf_mutex);
1850         return 0;
1851 }
1852
1853 static void p54_remove_interface(struct ieee80211_hw *dev,
1854                                  struct ieee80211_if_init_conf *conf)
1855 {
1856         struct p54_common *priv = dev->priv;
1857
1858         mutex_lock(&priv->conf_mutex);
1859         if (priv->cached_beacon)
1860                 p54_tx_cancel(dev, priv->cached_beacon);
1861         priv->mode = NL80211_IFTYPE_MONITOR;
1862         memset(priv->mac_addr, 0, ETH_ALEN);
1863         memset(priv->bssid, 0, ETH_ALEN);
1864         p54_setup_mac(dev);
1865         mutex_unlock(&priv->conf_mutex);
1866 }
1867
1868 static int p54_config(struct ieee80211_hw *dev, u32 changed)
1869 {
1870         int ret = 0;
1871         struct p54_common *priv = dev->priv;
1872         struct ieee80211_conf *conf = &dev->conf;
1873
1874         mutex_lock(&priv->conf_mutex);
1875         if (changed & IEEE80211_CONF_CHANGE_POWER)
1876                 priv->output_power = conf->power_level << 2;
1877         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
1878                 ret = p54_setup_mac(dev);
1879                 if (ret)
1880                         goto out;
1881         }
1882         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1883                 ret = p54_scan(dev, P54_SCAN_EXIT, 0);
1884                 if (ret)
1885                         goto out;
1886         }
1887
1888 out:
1889         mutex_unlock(&priv->conf_mutex);
1890         return ret;
1891 }
1892
1893 static int p54_config_interface(struct ieee80211_hw *dev,
1894                                 struct ieee80211_vif *vif,
1895                                 struct ieee80211_if_conf *conf)
1896 {
1897         struct p54_common *priv = dev->priv;
1898         int ret = 0;
1899
1900         mutex_lock(&priv->conf_mutex);
1901         if (conf->changed & IEEE80211_IFCC_BSSID) {
1902                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1903                 ret = p54_setup_mac(dev);
1904                 if (ret)
1905                         goto out;
1906         }
1907
1908         if (conf->changed & IEEE80211_IFCC_BEACON) {
1909                 ret = p54_scan(dev, P54_SCAN_EXIT, 0);
1910                 if (ret)
1911                         goto out;
1912                 ret = p54_setup_mac(dev);
1913                 if (ret)
1914                         goto out;
1915                 ret = p54_beacon_update(dev, vif);
1916                 if (ret)
1917                         goto out;
1918                 ret = p54_set_edcf(dev);
1919                 if (ret)
1920                         goto out;
1921         }
1922
1923         ret = p54_set_leds(dev, 1, !is_multicast_ether_addr(priv->bssid), 0);
1924
1925 out:
1926         mutex_unlock(&priv->conf_mutex);
1927         return ret;
1928 }
1929
1930 static void p54_configure_filter(struct ieee80211_hw *dev,
1931                                  unsigned int changed_flags,
1932                                  unsigned int *total_flags,
1933                                  int mc_count, struct dev_mc_list *mclist)
1934 {
1935         struct p54_common *priv = dev->priv;
1936
1937         *total_flags &= FIF_PROMISC_IN_BSS |
1938                         (*total_flags & FIF_PROMISC_IN_BSS) ?
1939                                 FIF_FCSFAIL : 0;
1940
1941         priv->filter_flags = *total_flags;
1942
1943         if (changed_flags & FIF_PROMISC_IN_BSS)
1944                 p54_setup_mac(dev);
1945 }
1946
1947 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1948                        const struct ieee80211_tx_queue_params *params)
1949 {
1950         struct p54_common *priv = dev->priv;
1951         int ret;
1952
1953         mutex_lock(&priv->conf_mutex);
1954         if ((params) && !(queue > 4)) {
1955                 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
1956                         params->cw_min, params->cw_max, params->txop);
1957                 ret = p54_set_edcf(dev);
1958         } else
1959                 ret = -EINVAL;
1960         mutex_unlock(&priv->conf_mutex);
1961         return ret;
1962 }
1963
1964 static int p54_init_xbow_synth(struct ieee80211_hw *dev)
1965 {
1966         struct p54_common *priv = dev->priv;
1967         struct sk_buff *skb;
1968         struct p54_xbow_synth *xbow;
1969
1970         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
1971                             sizeof(struct p54_hdr),
1972                             P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
1973                             GFP_KERNEL);
1974         if (!skb)
1975                 return -ENOMEM;
1976
1977         xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
1978         xbow->magic1 = cpu_to_le16(0x1);
1979         xbow->magic2 = cpu_to_le16(0x2);
1980         xbow->freq = cpu_to_le16(5390);
1981         memset(xbow->padding, 0, sizeof(xbow->padding));
1982         priv->tx(dev, skb);
1983         return 0;
1984 }
1985
1986 static void p54_work(struct work_struct *work)
1987 {
1988         struct p54_common *priv = container_of(work, struct p54_common,
1989                                                work.work);
1990         struct ieee80211_hw *dev = priv->hw;
1991         struct sk_buff *skb;
1992
1993         if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
1994                 return ;
1995
1996         /*
1997          * TODO: walk through tx_queue and do the following tasks
1998          *      1. initiate bursts.
1999          *      2. cancel stuck frames / reset the device if necessary.
2000          */
2001
2002         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(struct p54_hdr) +
2003                             sizeof(struct p54_statistics),
2004                             P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
2005         if (!skb)
2006                 return ;
2007
2008         priv->tx(dev, skb);
2009 }
2010
2011 static int p54_get_stats(struct ieee80211_hw *dev,
2012                          struct ieee80211_low_level_stats *stats)
2013 {
2014         struct p54_common *priv = dev->priv;
2015
2016         memcpy(stats, &priv->stats, sizeof(*stats));
2017         return 0;
2018 }
2019
2020 static int p54_get_tx_stats(struct ieee80211_hw *dev,
2021                             struct ieee80211_tx_queue_stats *stats)
2022 {
2023         struct p54_common *priv = dev->priv;
2024
2025         memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
2026
2027         return 0;
2028 }
2029
2030 static void p54_bss_info_changed(struct ieee80211_hw *dev,
2031                                  struct ieee80211_vif *vif,
2032                                  struct ieee80211_bss_conf *info,
2033                                  u32 changed)
2034 {
2035         struct p54_common *priv = dev->priv;
2036
2037         if (changed & BSS_CHANGED_ERP_SLOT) {
2038                 priv->use_short_slot = info->use_short_slot;
2039                 p54_set_edcf(dev);
2040         }
2041         if (changed & BSS_CHANGED_BASIC_RATES) {
2042                 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
2043                         priv->basic_rate_mask = (info->basic_rates << 4);
2044                 else
2045                         priv->basic_rate_mask = info->basic_rates;
2046                 p54_setup_mac(dev);
2047                 if (priv->fw_var >= 0x500)
2048                         p54_scan(dev, P54_SCAN_EXIT, 0);
2049         }
2050         if (changed & BSS_CHANGED_ASSOC) {
2051                 if (info->assoc) {
2052                         priv->aid = info->aid;
2053                         priv->wakeup_timer = info->beacon_int *
2054                                              info->dtim_period * 5;
2055                         p54_setup_mac(dev);
2056                 }
2057         }
2058
2059 }
2060
2061 static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
2062                        const u8 *local_address, const u8 *address,
2063                        struct ieee80211_key_conf *key)
2064 {
2065         struct p54_common *priv = dev->priv;
2066         struct sk_buff *skb;
2067         struct p54_keycache *rxkey;
2068         u8 algo = 0;
2069
2070         if (modparam_nohwcrypt)
2071                 return -EOPNOTSUPP;
2072
2073         if (cmd == DISABLE_KEY)
2074                 algo = 0;
2075         else {
2076                 switch (key->alg) {
2077                 case ALG_TKIP:
2078                         if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
2079                               BR_DESC_PRIV_CAP_TKIP)))
2080                                 return -EOPNOTSUPP;
2081                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2082                         algo = P54_CRYPTO_TKIPMICHAEL;
2083                         break;
2084                 case ALG_WEP:
2085                         if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP))
2086                                 return -EOPNOTSUPP;
2087                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2088                         algo = P54_CRYPTO_WEP;
2089                         break;
2090                 case ALG_CCMP:
2091                         if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP))
2092                                 return -EOPNOTSUPP;
2093                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2094                         algo = P54_CRYPTO_AESCCMP;
2095                         break;
2096                 default:
2097                         return -EOPNOTSUPP;
2098                 }
2099         }
2100
2101         if (key->keyidx > priv->rx_keycache_size) {
2102                 /*
2103                  * The device supports the choosen algorithm, but the firmware
2104                  * does not provide enough key slots to store all of them.
2105                  * So, incoming frames have to be decoded by the mac80211 stack,
2106                  * but we can still offload encryption for outgoing frames.
2107                  */
2108
2109                 return 0;
2110         }
2111
2112         mutex_lock(&priv->conf_mutex);
2113         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey) +
2114                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_RX_KEYCACHE,
2115                         GFP_ATOMIC);
2116         if (!skb) {
2117                 mutex_unlock(&priv->conf_mutex);
2118                 return -ENOMEM;
2119         }
2120
2121         /* TODO: some devices have 4 more free slots for rx keys */
2122         rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey));
2123         rxkey->entry = key->keyidx;
2124         rxkey->key_id = key->keyidx;
2125         rxkey->key_type = algo;
2126         if (address)
2127                 memcpy(rxkey->mac, address, ETH_ALEN);
2128         else
2129                 memset(rxkey->mac, ~0, ETH_ALEN);
2130         if (key->alg != ALG_TKIP) {
2131                 rxkey->key_len = min((u8)16, key->keylen);
2132                 memcpy(rxkey->key, key->key, rxkey->key_len);
2133         } else {
2134                 rxkey->key_len = 24;
2135                 memcpy(rxkey->key, key->key, 16);
2136                 memcpy(&(rxkey->key[16]), &(key->key
2137                         [NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8);
2138         }
2139
2140         priv->tx(dev, skb);
2141         mutex_unlock(&priv->conf_mutex);
2142         return 0;
2143 }
2144
2145 static const struct ieee80211_ops p54_ops = {
2146         .tx                     = p54_tx,
2147         .start                  = p54_start,
2148         .stop                   = p54_stop,
2149         .add_interface          = p54_add_interface,
2150         .remove_interface       = p54_remove_interface,
2151         .set_tim                = p54_set_tim,
2152         .sta_notify             = p54_sta_notify,
2153         .set_key                = p54_set_key,
2154         .config                 = p54_config,
2155         .config_interface       = p54_config_interface,
2156         .bss_info_changed       = p54_bss_info_changed,
2157         .configure_filter       = p54_configure_filter,
2158         .conf_tx                = p54_conf_tx,
2159         .get_stats              = p54_get_stats,
2160         .get_tx_stats           = p54_get_tx_stats
2161 };
2162
2163 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
2164 {
2165         struct ieee80211_hw *dev;
2166         struct p54_common *priv;
2167
2168         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
2169         if (!dev)
2170                 return NULL;
2171
2172         priv = dev->priv;
2173         priv->hw = dev;
2174         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
2175         priv->basic_rate_mask = 0x15f;
2176         skb_queue_head_init(&priv->tx_queue);
2177         dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
2178                      IEEE80211_HW_SIGNAL_DBM |
2179                      IEEE80211_HW_NOISE_DBM;
2180
2181         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2182                                       BIT(NL80211_IFTYPE_ADHOC) |
2183                                       BIT(NL80211_IFTYPE_AP) |
2184                                       BIT(NL80211_IFTYPE_MESH_POINT);
2185
2186         dev->channel_change_time = 1000;        /* TODO: find actual value */
2187         priv->tx_stats[0].limit = 1;            /* Beacon queue */
2188         priv->tx_stats[1].limit = 1;            /* Probe queue for HW scan */
2189         priv->tx_stats[2].limit = 3;            /* queue for MLMEs */
2190         priv->tx_stats[3].limit = 3;            /* Broadcast / MC queue */
2191         priv->tx_stats[4].limit = 5;            /* Data */
2192         dev->queues = 1;
2193         priv->noise = -94;
2194         /*
2195          * We support at most 8 tries no matter which rate they're at,
2196          * we cannot support max_rates * max_rate_tries as we set it
2197          * here, but setting it correctly to 4/2 or so would limit us
2198          * artificially if the RC algorithm wants just two rates, so
2199          * let's say 4/7, we'll redistribute it at TX time, see the
2200          * comments there.
2201          */
2202         dev->max_rates = 4;
2203         dev->max_rate_tries = 7;
2204         dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
2205                                  sizeof(struct p54_tx_data);
2206
2207         mutex_init(&priv->conf_mutex);
2208         init_completion(&priv->eeprom_comp);
2209         INIT_DELAYED_WORK(&priv->work, p54_work);
2210
2211         return dev;
2212 }
2213 EXPORT_SYMBOL_GPL(p54_init_common);
2214
2215 void p54_free_common(struct ieee80211_hw *dev)
2216 {
2217         struct p54_common *priv = dev->priv;
2218         kfree(priv->iq_autocal);
2219         kfree(priv->output_limit);
2220         kfree(priv->curve_data);
2221 }
2222 EXPORT_SYMBOL_GPL(p54_free_common);
2223
2224 static int __init p54_init(void)
2225 {
2226         return 0;
2227 }
2228
2229 static void __exit p54_exit(void)
2230 {
2231 }
2232
2233 module_init(p54_init);
2234 module_exit(p54_exit);