SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/p54/p54common.c

   1 /*
   2  * Common code for mac80211 Prism54 drivers
   3  *
   4  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   5  * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
   6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * Based on:
   9  * - the islsm (softmac prism54) driver, which is:
  10  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  11  * - stlc45xx driver
  12  * C\ 2  Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/firmware.h>
  21 #include <linux/etherdevice.h>
  22
  23 #include <net/mac80211.h>
  24
  25 #include "p54.h"
  26 #include "p54common.h"
  27
  28 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  29 MODULE_DESCRIPTION("Softmac Prism54 common code");
  30 MODULE_LICENSE("GPL");
  31 MODULE_ALIAS("prism54common");
  32
  33 static struct ieee80211_rate p54_bgrates[] = {
  34         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  35         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  36         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  37         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  38         { .bitrate = 60, .hw_value = 4, },
  39         { .bitrate = 90, .hw_value = 5, },
  40         { .bitrate = 120, .hw_value = 6, },
  41         { .bitrate = 180, .hw_value = 7, },
  42         { .bitrate = 240, .hw_value = 8, },
  43         { .bitrate = 360, .hw_value = 9, },
  44         { .bitrate = 480, .hw_value = 10, },
  45         { .bitrate = 540, .hw_value = 11, },
  46 };
  47
  48 static struct ieee80211_channel p54_bgchannels[] = {
  49         { .center_freq = 2412, .hw_value = 1, },
  50         { .center_freq = 2417, .hw_value = 2, },
  51         { .center_freq = 2422, .hw_value = 3, },
  52         { .center_freq = 2427, .hw_value = 4, },
  53         { .center_freq = 2432, .hw_value = 5, },
  54         { .center_freq = 2437, .hw_value = 6, },
  55         { .center_freq = 2442, .hw_value = 7, },
  56         { .center_freq = 2447, .hw_value = 8, },
  57         { .center_freq = 2452, .hw_value = 9, },
  58         { .center_freq = 2457, .hw_value = 10, },
  59         { .center_freq = 2462, .hw_value = 11, },
  60         { .center_freq = 2467, .hw_value = 12, },
  61         { .center_freq = 2472, .hw_value = 13, },
  62         { .center_freq = 2484, .hw_value = 14, },
  63 };
  64
  65 static struct ieee80211_supported_band band_2GHz = {
  66         .channels = p54_bgchannels,
  67         .n_channels = ARRAY_SIZE(p54_bgchannels),
  68         .bitrates = p54_bgrates,
  69         .n_bitrates = ARRAY_SIZE(p54_bgrates),
  70 };
  71
  72 static struct ieee80211_rate p54_arates[] = {
  73         { .bitrate = 60, .hw_value = 4, },
  74         { .bitrate = 90, .hw_value = 5, },
  75         { .bitrate = 120, .hw_value = 6, },
  76         { .bitrate = 180, .hw_value = 7, },
  77         { .bitrate = 240, .hw_value = 8, },
  78         { .bitrate = 360, .hw_value = 9, },
  79         { .bitrate = 480, .hw_value = 10, },
  80         { .bitrate = 540, .hw_value = 11, },
  81 };
  82
  83 static struct ieee80211_channel p54_achannels[] = {
  84         { .center_freq = 4920 },
  85         { .center_freq = 4940 },
  86         { .center_freq = 4960 },
  87         { .center_freq = 4980 },
  88         { .center_freq = 5040 },
  89         { .center_freq = 5060 },
  90         { .center_freq = 5080 },
  91         { .center_freq = 5170 },
  92         { .center_freq = 5180 },
  93         { .center_freq = 5190 },
  94         { .center_freq = 5200 },
  95         { .center_freq = 5210 },
  96         { .center_freq = 5220 },
  97         { .center_freq = 5230 },
  98         { .center_freq = 5240 },
  99         { .center_freq = 5260 },
 100         { .center_freq = 5280 },
 101         { .center_freq = 5300 },
 102         { .center_freq = 5320 },
 103         { .center_freq = 5500 },
 104         { .center_freq = 5520 },
 105         { .center_freq = 5540 },
 106         { .center_freq = 5560 },
 107         { .center_freq = 5580 },
 108         { .center_freq = 5600 },
 109         { .center_freq = 5620 },
 110         { .center_freq = 5640 },
 111         { .center_freq = 5660 },
 112         { .center_freq = 5680 },
 113         { .center_freq = 5700 },
 114         { .center_freq = 5745 },
 115         { .center_freq = 5765 },
 116         { .center_freq = 5785 },
 117         { .center_freq = 5805 },
 118         { .center_freq = 5825 },
 119 };
 120
 121 static struct ieee80211_supported_band band_5GHz = {
 122         .channels = p54_achannels,
 123         .n_channels = ARRAY_SIZE(p54_achannels),
 124         .bitrates = p54_arates,
 125         .n_bitrates = ARRAY_SIZE(p54_arates),
 126 };
 127
 128 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
 129 {
 130         struct p54_common *priv = dev->priv;
 131         struct bootrec_exp_if *exp_if;
 132         struct bootrec *bootrec;
 133         u32 *data = (u32 *)fw->data;
 134         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
 135         u8 *fw_version = NULL;
 136         size_t len;
 137         int i;
 138
 139         if (priv->rx_start)
 140                 return 0;
 141
 142         while (data < end_data && *data)
 143                 data++;
 144
 145         while (data < end_data && !*data)
 146                 data++;
 147
 148         bootrec = (struct bootrec *) data;
 149
 150         while (bootrec->data <= end_data &&
 151                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
 152                 u32 code = le32_to_cpu(bootrec->code);
 153                 switch (code) {
 154                 case BR_CODE_COMPONENT_ID:
 155                         priv->fw_interface = be32_to_cpup((__be32 *)
 156                                              bootrec->data);
 157                         switch (priv->fw_interface) {
 158                         case FW_FMAC:
 159                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
 160                                 break;
 161                         case FW_LM20:
 162                                 printk(KERN_INFO "p54: LM20 firmware\n");
 163                                 break;
 164                         case FW_LM86:
 165                                 printk(KERN_INFO "p54: LM86 firmware\n");
 166                                 break;
 167                         case FW_LM87:
 168                                 printk(KERN_INFO "p54: LM87 firmware\n");
 169                                 break;
 170                         default:
 171                                 printk(KERN_INFO "p54: unknown firmware\n");
 172                                 break;
 173                         }
 174                         break;
 175                 case BR_CODE_COMPONENT_VERSION:
 176                         /* 24 bytes should be enough for all firmwares */
 177                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
 178                                 fw_version = (unsigned char*)bootrec->data;
 179                         break;
 180                 case BR_CODE_DESCR: {
 181                         struct bootrec_desc *desc =
 182                                 (struct bootrec_desc *)bootrec->data;
 183                         priv->rx_start = le32_to_cpu(desc->rx_start);
 184                         /* FIXME add sanity checking */
 185                         priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
 186                         priv->headroom = desc->headroom;
 187                         priv->tailroom = desc->tailroom;
 188                         if (le32_to_cpu(bootrec->len) == 11)
 189                                 priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
 190                         else
 191                                 priv->rx_mtu = (size_t)
 192                                         0x620 - priv->tx_hdr_len;
 193                         break;
 194                         }
 195                 case BR_CODE_EXPOSED_IF:
 196                         exp_if = (struct bootrec_exp_if *) bootrec->data;
 197                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
 198                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
 199                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
 200                         break;
 201                 case BR_CODE_DEPENDENT_IF:
 202                         break;
 203                 case BR_CODE_END_OF_BRA:
 204                 case LEGACY_BR_CODE_END_OF_BRA:
 205                         end_data = NULL;
 206                         break;
 207                 default:
 208                         break;
 209                 }
 210                 bootrec = (struct bootrec *)&bootrec->data[len];
 211         }
 212
 213         if (fw_version)
 214                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
 215                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
 216
 217         if (priv->fw_var >= 0x300) {
 218                 /* Firmware supports QoS, use it! */
 219                 priv->tx_stats[4].limit = 3;
 220                 priv->tx_stats[5].limit = 4;
 221                 priv->tx_stats[6].limit = 3;
 222                 priv->tx_stats[7].limit = 1;
 223                 dev->queues = 4;
 224         }
 225
 226         return 0;
 227 }
 228 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 229
 230 static int p54_convert_rev0(struct ieee80211_hw *dev,
 231                             struct pda_pa_curve_data *curve_data)
 232 {
 233         struct p54_common *priv = dev->priv;
 234         struct p54_pa_curve_data_sample *dst;
 235         struct pda_pa_curve_data_sample_rev0 *src;
 236         size_t cd_len = sizeof(*curve_data) +
 237                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 238                  curve_data->channels;
 239         unsigned int i, j;
 240         void *source, *target;
 241
 242         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 243         if (!priv->curve_data)
 244                 return -ENOMEM;
 245
 246         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 247         source = curve_data->data;
 248         target = priv->curve_data->data;
 249         for (i = 0; i < curve_data->channels; i++) {
 250                 __le16 *freq = source;
 251                 source += sizeof(__le16);
 252                 *((__le16 *)target) = *freq;
 253                 target += sizeof(__le16);
 254                 for (j = 0; j < curve_data->points_per_channel; j++) {
 255                         dst = target;
 256                         src = source;
 257
 258                         dst->rf_power = src->rf_power;
 259                         dst->pa_detector = src->pa_detector;
 260                         dst->data_64qam = src->pcv;
 261                         /* "invent" the points for the other modulations */
 262 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 263                         dst->data_16qam = SUB(src->pcv, 12);
 264                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 265                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 266                         dst->data_barker = SUB(dst->data_bpsk, 14);
 267 #undef SUB
 268                         target += sizeof(*dst);
 269                         source += sizeof(*src);
 270                 }
 271         }
 272
 273         return 0;
 274 }
 275
 276 static int p54_convert_rev1(struct ieee80211_hw *dev,
 277                             struct pda_pa_curve_data *curve_data)
 278 {
 279         struct p54_common *priv = dev->priv;
 280         struct p54_pa_curve_data_sample *dst;
 281         struct pda_pa_curve_data_sample_rev1 *src;
 282         size_t cd_len = sizeof(*curve_data) +
 283                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 284                  curve_data->channels;
 285         unsigned int i, j;
 286         void *source, *target;
 287
 288         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 289         if (!priv->curve_data)
 290                 return -ENOMEM;
 291
 292         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 293         source = curve_data->data;
 294         target = priv->curve_data->data;
 295         for (i = 0; i < curve_data->channels; i++) {
 296                 __le16 *freq = source;
 297                 source += sizeof(__le16);
 298                 *((__le16 *)target) = *freq;
 299                 target += sizeof(__le16);
 300                 for (j = 0; j < curve_data->points_per_channel; j++) {
 301                         memcpy(target, source, sizeof(*src));
 302
 303                         target += sizeof(*dst);
 304                         source += sizeof(*src);
 305                 }
 306                 source++;
 307         }
 308
 309         return 0;
 310 }
 311
 312 static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
 313                               "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
 314 static int p54_init_xbow_synth(struct ieee80211_hw *dev);
 315
 316 static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 317 {
 318         struct p54_common *priv = dev->priv;
 319         struct eeprom_pda_wrap *wrap = NULL;
 320         struct pda_entry *entry;
 321         unsigned int data_len, entry_len;
 322         void *tmp;
 323         int err;
 324         u8 *end = (u8 *)eeprom + len;
 325         u16 synth = 0;
 326
 327         wrap = (struct eeprom_pda_wrap *) eeprom;
 328         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 329
 330         /* verify that at least the entry length/code fits */
 331         while ((u8 *)entry <= end - sizeof(*entry)) {
 332                 entry_len = le16_to_cpu(entry->len);
 333                 data_len = ((entry_len - 1) << 1);
 334
 335                 /* abort if entry exceeds whole structure */
 336                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 337                         break;
 338
 339                 switch (le16_to_cpu(entry->code)) {
 340                 case PDR_MAC_ADDRESS:
 341                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 342                         break;
 343                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 344                         if (data_len < 2) {
 345                                 err = -EINVAL;
 346                                 goto err;
 347                         }
 348
 349                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 350                                 err = -EINVAL;
 351                                 goto err;
 352                         }
 353
 354                         priv->output_limit = kmalloc(entry->data[1] *
 355                                 sizeof(*priv->output_limit), GFP_KERNEL);
 356
 357                         if (!priv->output_limit) {
 358                                 err = -ENOMEM;
 359                                 goto err;
 360                         }
 361
 362                         memcpy(priv->output_limit, &entry->data[2],
 363                                entry->data[1]*sizeof(*priv->output_limit));
 364                         priv->output_limit_len = entry->data[1];
 365                         break;
 366                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 367                         struct pda_pa_curve_data *curve_data =
 368                                 (struct pda_pa_curve_data *)entry->data;
 369                         if (data_len < sizeof(*curve_data)) {
 370                                 err = -EINVAL;
 371                                 goto err;
 372                         }
 373
 374                         switch (curve_data->cal_method_rev) {
 375                         case 0:
 376                                 err = p54_convert_rev0(dev, curve_data);
 377                                 break;
 378                         case 1:
 379                                 err = p54_convert_rev1(dev, curve_data);
 380                                 break;
 381                         default:
 382                                 printk(KERN_ERR "p54: unknown curve data "
 383                                                 "revision %d\n",
 384                                                 curve_data->cal_method_rev);
 385                                 err = -ENODEV;
 386                                 break;
 387                         }
 388                         if (err)
 389                                 goto err;
 390
 391                 }
 392                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 393                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 394                         if (!priv->iq_autocal) {
 395                                 err = -ENOMEM;
 396                                 goto err;
 397                         }
 398
 399                         memcpy(priv->iq_autocal, entry->data, data_len);
 400                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 401                         break;
 402                 case PDR_INTERFACE_LIST:
 403                         tmp = entry->data;
 404                         while ((u8 *)tmp < entry->data + data_len) {
 405                                 struct bootrec_exp_if *exp_if = tmp;
 406                                 if (le16_to_cpu(exp_if->if_id) == 0xf)
 407                                         synth = le16_to_cpu(exp_if->variant);
 408                                 tmp += sizeof(struct bootrec_exp_if);
 409                         }
 410                         break;
 411                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 412                         priv->version = *(u8 *)(entry->data + 1);
 413                         break;
 414                 case PDR_END:
 415                         /* make it overrun */
 416                         entry_len = len;
 417                         break;
 418                 default:
 419                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
 420                                 le16_to_cpu(entry->code));
 421                         break;
 422                 }
 423
 424                 entry = (void *)entry + (entry_len + 1)*2;
 425         }
 426
 427         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 428             !priv->curve_data) {
 429                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 430                 err = -EINVAL;
 431                 goto err;
 432         }
 433
 434         priv->rxhw = synth & 0x07;
 435         if (priv->rxhw == 4)
 436                 p54_init_xbow_synth(dev);
 437         if (!(synth & 0x40))
 438                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 439         if (!(synth & 0x80))
 440                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
 441
 442         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 443                 u8 perm_addr[ETH_ALEN];
 444
 445                 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
 446                         wiphy_name(dev->wiphy));
 447                 random_ether_addr(perm_addr);
 448                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 449         }
 450
 451         printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
 452                 wiphy_name(dev->wiphy),
 453                 dev->wiphy->perm_addr,
 454                 priv->version, p54_rf_chips[priv->rxhw]);
 455
 456         return 0;
 457
 458   err:
 459         if (priv->iq_autocal) {
 460                 kfree(priv->iq_autocal);
 461                 priv->iq_autocal = NULL;
 462         }
 463
 464         if (priv->output_limit) {
 465                 kfree(priv->output_limit);
 466                 priv->output_limit = NULL;
 467         }
 468
 469         if (priv->curve_data) {
 470                 kfree(priv->curve_data);
 471                 priv->curve_data = NULL;
 472         }
 473
 474         printk(KERN_ERR "p54: eeprom parse failed!\n");
 475         return err;
 476 }
 477
 478 static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
 479 {
 480         /* TODO: get the rssi_add & rssi_mul data from the eeprom */
 481         return ((rssi * 0x83) / 64 - 400) / 4;
 482 }
 483
 484 static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 485 {
 486         struct p54_common *priv = dev->priv;
 487         struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
 488         struct ieee80211_rx_status rx_status = {0};
 489         u16 freq = le16_to_cpu(hdr->freq);
 490         size_t header_len = sizeof(*hdr);
 491         u32 tsf32;
 492
 493         if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
 494                 if (priv->filter_flags & FIF_FCSFAIL)
 495                         rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 496                 else
 497                         return 0;
 498         }
 499
 500         rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
 501         rx_status.noise = priv->noise;
 502         /* XX correct? */
 503         rx_status.qual = (100 * hdr->rssi) / 127;
 504         rx_status.rate_idx = (dev->conf.channel->band == IEEE80211_BAND_2GHZ ?
 505                         hdr->rate : (hdr->rate - 4)) & 0xf;
 506         rx_status.freq = freq;
 507         rx_status.band =  dev->conf.channel->band;
 508         rx_status.antenna = hdr->antenna;
 509
 510         tsf32 = le32_to_cpu(hdr->tsf32);
 511         if (tsf32 < priv->tsf_low32)
 512                 priv->tsf_high32++;
 513         rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
 514         priv->tsf_low32 = tsf32;
 515
 516         rx_status.flag |= RX_FLAG_TSFT;
 517
 518         if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 519                 header_len += hdr->align[0];
 520
 521         skb_pull(skb, header_len);
 522         skb_trim(skb, le16_to_cpu(hdr->len));
 523
 524         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 525
 526         return -1;
 527 }
 528
 529 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 530 {
 531         struct p54_common *priv = dev->priv;
 532         int i;
 533
 534         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
 535                 return ;
 536
 537         for (i = 0; i < dev->queues; i++)
 538                 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
 539                         ieee80211_wake_queue(dev, i);
 540 }
 541
 542 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
 543 {
 544         struct p54_common *priv = dev->priv;
 545         struct ieee80211_tx_info *info;
 546         struct memrecord *range;
 547         unsigned long flags;
 548         u32 freed = 0, last_addr = priv->rx_start;
 549
 550         if (!skb || !dev)
 551                 return;
 552
 553         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 554         info = IEEE80211_SKB_CB(skb);
 555         range = (void *)info->rate_driver_data;
 556         if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
 557                 struct ieee80211_tx_info *ni;
 558                 struct memrecord *mr;
 559
 560                 ni = IEEE80211_SKB_CB(skb->prev);
 561                 mr = (struct memrecord *)ni->rate_driver_data;
 562                 last_addr = mr->end_addr;
 563         }
 564         if (skb->next != (struct sk_buff *)&priv->tx_queue) {
 565                 struct ieee80211_tx_info *ni;
 566                 struct memrecord *mr;
 567
 568                 ni = IEEE80211_SKB_CB(skb->next);
 569                 mr = (struct memrecord *)ni->rate_driver_data;
 570                 freed = mr->start_addr - last_addr;
 571         } else
 572                 freed = priv->rx_end - last_addr;
 573         __skb_unlink(skb, &priv->tx_queue);
 574         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 575         kfree_skb(skb);
 576
 577         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 578                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 579                 p54_wake_free_queues(dev);
 580 }
 581 EXPORT_SYMBOL_GPL(p54_free_skb);
 582
 583 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 584 {
 585         struct p54_common *priv = dev->priv;
 586         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 587         struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
 588         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 589         u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
 590         struct memrecord *range = NULL;
 591         u32 freed = 0;
 592         u32 last_addr = priv->rx_start;
 593         unsigned long flags;
 594         int count, idx;
 595
 596         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 597         while (entry != (struct sk_buff *)&priv->tx_queue) {
 598                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 599                 struct p54_hdr *entry_hdr;
 600                 struct p54_tx_data *entry_data;
 601                 int pad = 0;
 602
 603                 range = (void *)info->rate_driver_data;
 604                 if (range->start_addr != addr) {
 605                         last_addr = range->end_addr;
 606                         entry = entry->next;
 607                         continue;
 608                 }
 609
 610                 if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 611                         struct ieee80211_tx_info *ni;
 612                         struct memrecord *mr;
 613
 614                         ni = IEEE80211_SKB_CB(entry->next);
 615                         mr = (struct memrecord *)ni->rate_driver_data;
 616                         freed = mr->start_addr - last_addr;
 617                 } else
 618                         freed = priv->rx_end - last_addr;
 619
 620                 last_addr = range->end_addr;
 621                 __skb_unlink(entry, &priv->tx_queue);
 622                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 623
 624                 /*
 625                  * Clear manually, ieee80211_tx_info_clear_status would
 626                  * clear the counts too and we need them.
 627                  */
 628                 memset(&info->status.ampdu_ack_len, 0,
 629                        sizeof(struct ieee80211_tx_info) -
 630                        offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
 631                 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
 632                                       status.ampdu_ack_len) != 23);
 633
 634                 entry_hdr = (struct p54_hdr *) entry->data;
 635                 entry_data = (struct p54_tx_data *) entry_hdr->data;
 636                 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 637                         pad = entry_data->align[0];
 638
 639                 /* walk through the rates array and adjust the counts */
 640                 count = payload->tries;
 641                 for (idx = 0; idx < 4; idx++) {
 642                         if (count >= info->status.rates[idx].count) {
 643                                 count -= info->status.rates[idx].count;
 644                         } else if (count > 0) {
 645                                 info->status.rates[idx].count = count;
 646                                 count = 0;
 647                         } else {
 648                                 info->status.rates[idx].idx = -1;
 649                                 info->status.rates[idx].count = 0;
 650                         }
 651                 }
 652
 653                 priv->tx_stats[entry_data->hw_queue].len--;
 654                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
 655                      (!payload->status))
 656                         info->flags |= IEEE80211_TX_STAT_ACK;
 657                 if (payload->status & 0x02)
 658                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
 659                 info->status.ack_signal = p54_rssi_to_dbm(dev,
 660                                 (int)payload->ack_rssi);
 661                 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 662                 ieee80211_tx_status_irqsafe(dev, entry);
 663                 goto out;
 664         }
 665         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 666
 667 out:
 668         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 669                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 670                 p54_wake_free_queues(dev);
 671 }
 672
 673 static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
 674                                    struct sk_buff *skb)
 675 {
 676         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 677         struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
 678         struct p54_common *priv = dev->priv;
 679
 680         if (!priv->eeprom)
 681                 return ;
 682
 683         memcpy(priv->eeprom, eeprom->data, le16_to_cpu(eeprom->len));
 684
 685         complete(&priv->eeprom_comp);
 686 }
 687
 688 static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
 689 {
 690         struct p54_common *priv = dev->priv;
 691         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 692         struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
 693         u32 tsf32 = le32_to_cpu(stats->tsf32);
 694
 695         if (tsf32 < priv->tsf_low32)
 696                 priv->tsf_high32++;
 697         priv->tsf_low32 = tsf32;
 698
 699         priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
 700         priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
 701         priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
 702
 703         priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
 704         complete(&priv->stats_comp);
 705
 706         mod_timer(&priv->stats_timer, jiffies + 5 * HZ);
 707 }
 708
 709 static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 710 {
 711         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 712
 713         switch (le16_to_cpu(hdr->type)) {
 714         case P54_CONTROL_TYPE_TXDONE:
 715                 p54_rx_frame_sent(dev, skb);
 716                 break;
 717         case P54_CONTROL_TYPE_BBP:
 718                 break;
 719         case P54_CONTROL_TYPE_STAT_READBACK:
 720                 p54_rx_stats(dev, skb);
 721                 break;
 722         case P54_CONTROL_TYPE_EEPROM_READBACK:
 723                 p54_rx_eeprom_readback(dev, skb);
 724                 break;
 725         default:
 726                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 727                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 728                 break;
 729         }
 730
 731         return 0;
 732 }
 733
 734 /* returns zero if skb can be reused */
 735 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 736 {
 737         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
 738
 739         if (type == 0x80)
 740                 return p54_rx_control(dev, skb);
 741         else
 742                 return p54_rx_data(dev, skb);
 743 }
 744 EXPORT_SYMBOL_GPL(p54_rx);
 745
 746 /*
 747  * So, the firmware is somewhat stupid and doesn't know what places in its
 748  * memory incoming data should go to. By poking around in the firmware, we
 749  * can find some unused memory to upload our packets to. However, data that we
 750  * want the card to TX needs to stay intact until the card has told us that
 751  * it is done with it. This function finds empty places we can upload to and
 752  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 753  * allocated areas.
 754  */
 755 static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 756                                struct p54_hdr *data, u32 len)
 757 {
 758         struct p54_common *priv = dev->priv;
 759         struct sk_buff *entry = priv->tx_queue.next;
 760         struct sk_buff *target_skb = NULL;
 761         struct ieee80211_tx_info *info;
 762         struct memrecord *range;
 763         u32 last_addr = priv->rx_start;
 764         u32 largest_hole = 0;
 765         u32 target_addr = priv->rx_start;
 766         unsigned long flags;
 767         unsigned int left;
 768         len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
 769
 770         if (!skb)
 771                 return -EINVAL;
 772
 773         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 774         left = skb_queue_len(&priv->tx_queue);
 775         while (left--) {
 776                 u32 hole_size;
 777                 info = IEEE80211_SKB_CB(entry);
 778                 range = (void *)info->rate_driver_data;
 779                 hole_size = range->start_addr - last_addr;
 780                 if (!target_skb && hole_size >= len) {
 781                         target_skb = entry->prev;
 782                         hole_size -= len;
 783                         target_addr = last_addr;
 784                 }
 785                 largest_hole = max(largest_hole, hole_size);
 786                 last_addr = range->end_addr;
 787                 entry = entry->next;
 788         }
 789         if (!target_skb && priv->rx_end - last_addr >= len) {
 790                 target_skb = priv->tx_queue.prev;
 791                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 792                 if (!skb_queue_empty(&priv->tx_queue)) {
 793                         info = IEEE80211_SKB_CB(target_skb);
 794                         range = (void *)info->rate_driver_data;
 795                         target_addr = range->end_addr;
 796                 }
 797         } else
 798                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 799
 800         if (!target_skb) {
 801                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 802                 ieee80211_stop_queues(dev);
 803                 return -ENOMEM;
 804         }
 805
 806         info = IEEE80211_SKB_CB(skb);
 807         range = (void *)info->rate_driver_data;
 808         range->start_addr = target_addr;
 809         range->end_addr = target_addr + len;
 810         __skb_queue_after(&priv->tx_queue, target_skb, skb);
 811         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 812
 813         if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
 814                            48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 815                 ieee80211_stop_queues(dev);
 816
 817         data->req_id = cpu_to_le32(target_addr + priv->headroom);
 818         return 0;
 819 }
 820
 821 static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
 822                 u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
 823 {
 824         struct p54_common *priv = dev->priv;
 825         struct p54_hdr *hdr;
 826         struct sk_buff *skb;
 827
 828         skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
 829         if (!skb)
 830                 return NULL;
 831         skb_reserve(skb, priv->tx_hdr_len);
 832
 833         hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
 834         hdr->flags = cpu_to_le16(hdr_flags);
 835         hdr->len = cpu_to_le16(len - sizeof(*hdr));
 836         hdr->type = cpu_to_le16(type);
 837         hdr->tries = hdr->rts_tries = 0;
 838
 839         if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
 840                 kfree_skb(skb);
 841                 return NULL;
 842         }
 843         return skb;
 844 }
 845
 846 int p54_read_eeprom(struct ieee80211_hw *dev)
 847 {
 848         struct p54_common *priv = dev->priv;
 849         struct p54_hdr *hdr = NULL;
 850         struct p54_eeprom_lm86 *eeprom_hdr;
 851         struct sk_buff *skb;
 852         size_t eeprom_size = 0x2020, offset = 0, blocksize;
 853         int ret = -ENOMEM;
 854         void *eeprom = NULL;
 855
 856         skb = p54_alloc_skb(dev, 0x8000, sizeof(*hdr) + sizeof(*eeprom_hdr) +
 857                             EEPROM_READBACK_LEN,
 858                             P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
 859         if (!skb)
 860                 goto free;
 861         priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
 862         if (!priv->eeprom)
 863                 goto free;
 864         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 865         if (!eeprom)
 866                 goto free;
 867
 868         eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
 869                      sizeof(*eeprom_hdr) + EEPROM_READBACK_LEN);
 870
 871         while (eeprom_size) {
 872                 blocksize = min(eeprom_size, (size_t)EEPROM_READBACK_LEN);
 873                 eeprom_hdr->offset = cpu_to_le16(offset);
 874                 eeprom_hdr->len = cpu_to_le16(blocksize);
 875                 priv->tx(dev, skb, 0);
 876
 877                 if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
 878                         printk(KERN_ERR "%s: device does not respond!\n",
 879                                 wiphy_name(dev->wiphy));
 880                         ret = -EBUSY;
 881                         goto free;
 882                 }
 883
 884                 memcpy(eeprom + offset, priv->eeprom, blocksize);
 885                 offset += blocksize;
 886                 eeprom_size -= blocksize;
 887         }
 888
 889         ret = p54_parse_eeprom(dev, eeprom, offset);
 890 free:
 891         kfree(priv->eeprom);
 892         priv->eeprom = NULL;
 893         p54_free_skb(dev, skb);
 894         kfree(eeprom);
 895
 896         return ret;
 897 }
 898 EXPORT_SYMBOL_GPL(p54_read_eeprom);
 899
 900 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 901 {
 902         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 903         struct ieee80211_tx_queue_stats *current_queue;
 904         struct p54_common *priv = dev->priv;
 905         struct p54_hdr *hdr;
 906         struct p54_tx_data *txhdr;
 907         size_t padding, len;
 908         int i, j, ridx;
 909         u8 rate;
 910         u8 cts_rate = 0x20;
 911         u8 rc_flags;
 912         u8 calculated_tries[4];
 913         u8 nrates = 0, nremaining = 8;
 914
 915         current_queue = &priv->tx_stats[skb_get_queue_mapping(skb) + 4];
 916         if (unlikely(current_queue->len > current_queue->limit))
 917                 return NETDEV_TX_BUSY;
 918         current_queue->len++;
 919         current_queue->count++;
 920         if (current_queue->len == current_queue->limit)
 921                 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
 922
 923         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 924         len = skb->len;
 925
 926         txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
 927         hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
 928
 929         if (padding)
 930                 hdr->flags = cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN);
 931         else
 932                 hdr->flags = cpu_to_le16(0);
 933         hdr->len = cpu_to_le16(len);
 934         hdr->type = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 0 : cpu_to_le16(1);
 935         hdr->rts_tries = info->control.rates[0].count;
 936
 937         /*
 938          * we register the rates in perfect order, and
 939          * RTS/CTS won't happen on 5 GHz
 940          */
 941         cts_rate = info->control.rts_cts_rate_idx;
 942
 943         memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
 944
 945         /* see how many rates got used */
 946         for (i = 0; i < 4; i++) {
 947                 if (info->control.rates[i].idx < 0)
 948                         break;
 949                 nrates++;
 950         }
 951
 952         /* limit tries to 8/nrates per rate */
 953         for (i = 0; i < nrates; i++) {
 954                 /*
 955                  * The magic expression here is equivalent to 8/nrates for
 956                  * all values that matter, but avoids division and jumps.
 957                  * Note that nrates can only take the values 1 through 4.
 958                  */
 959                 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
 960                                                  info->control.rates[i].count);
 961                 nremaining -= calculated_tries[i];
 962         }
 963
 964         /* if there are tries left, distribute from back to front */
 965         for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
 966                 int tmp = info->control.rates[i].count - calculated_tries[i];
 967
 968                 if (tmp <= 0)
 969                         continue;
 970                 /* RC requested more tries at this rate */
 971
 972                 tmp = min_t(int, tmp, nremaining);
 973                 calculated_tries[i] += tmp;
 974                 nremaining -= tmp;
 975         }
 976
 977         ridx = 0;
 978         for (i = 0; i < nrates && ridx < 8; i++) {
 979                 /* we register the rates in perfect order */
 980                 rate = info->control.rates[i].idx;
 981                 if (info->band == IEEE80211_BAND_5GHZ)
 982                         rate += 4;
 983
 984                 /* store the count we actually calculated for TX status */
 985                 info->control.rates[i].count = calculated_tries[i];
 986
 987                 rc_flags = info->control.rates[i].flags;
 988                 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
 989                         rate |= 0x10;
 990                         cts_rate |= 0x10;
 991                 }
 992                 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
 993                         rate |= 0x40;
 994                 else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
 995                         rate |= 0x20;
 996                 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
 997                         txhdr->rateset[ridx] = rate;
 998                         ridx++;
 999                 }
1000         }
1001         hdr->tries = ridx;
1002         txhdr->crypt_offset = 0;
1003         txhdr->rts_rate_idx = 0;
1004         txhdr->key_type = 0;
1005         txhdr->key_len = 0;
1006         txhdr->hw_queue = skb_get_queue_mapping(skb) + 4;
1007         txhdr->backlog = 32;
1008         memset(txhdr->durations, 0, sizeof(txhdr->durations));
1009         txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
1010                 2 : info->antenna_sel_tx - 1;
1011         txhdr->output_power = priv->output_power;
1012         txhdr->cts_rate = cts_rate;
1013         if (padding)
1014                 txhdr->align[0] = padding;
1015
1016         /* modifies skb->cb and with it info, so must be last! */
1017         if (unlikely(p54_assign_address(dev, skb, hdr, skb->len))) {
1018                 skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
1019                 return NETDEV_TX_BUSY;
1020         }
1021         priv->tx(dev, skb, 0);
1022         return 0;
1023 }
1024
1025 static int p54_setup_mac(struct ieee80211_hw *dev, u16 mode, const u8 *bssid)
1026 {
1027         struct p54_common *priv = dev->priv;
1028         struct sk_buff *skb;
1029         struct p54_setup_mac *setup;
1030
1031         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
1032                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
1033                             GFP_ATOMIC);
1034         if (!skb)
1035                 return -ENOMEM;
1036
1037         setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
1038         priv->mac_mode = mode;
1039         setup->mac_mode = cpu_to_le16(mode);
1040         memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
1041         if (!bssid)
1042                 memset(setup->bssid, ~0, ETH_ALEN);
1043         else
1044                 memcpy(setup->bssid, bssid, ETH_ALEN);
1045         setup->rx_antenna = priv->rx_antenna;
1046         if (priv->fw_var < 0x500) {
1047                 setup->v1.basic_rate_mask = cpu_to_le32(0x15f);
1048                 setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
1049                 setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
1050                 setup->v1.rxhw = cpu_to_le16(priv->rxhw);
1051                 setup->v1.wakeup_timer = cpu_to_le16(500);
1052                 setup->v1.unalloc0 = cpu_to_le16(0);
1053         } else {
1054                 setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
1055                 setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
1056                 setup->v2.rxhw = cpu_to_le16(priv->rxhw);
1057                 setup->v2.timer = cpu_to_le16(1000);
1058                 setup->v2.truncate = cpu_to_le16(48896);
1059                 setup->v2.basic_rate_mask = cpu_to_le32(0x15f);
1060                 setup->v2.sbss_offset = 0;
1061                 setup->v2.mcast_window = 0;
1062                 setup->v2.rx_rssi_threshold = 0;
1063                 setup->v2.rx_ed_threshold = 0;
1064                 setup->v2.ref_clock = cpu_to_le32(644245094);
1065                 setup->v2.lpf_bandwidth = cpu_to_le16(65535);
1066                 setup->v2.osc_start_delay = cpu_to_le16(65535);
1067         }
1068         priv->tx(dev, skb, 1);
1069         return 0;
1070 }
1071
1072 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
1073 {
1074         struct p54_common *priv = dev->priv;
1075         struct sk_buff *skb;
1076         struct p54_scan *chan;
1077         unsigned int i;
1078         void *entry;
1079
1080         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
1081                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
1082                             GFP_ATOMIC);
1083         if (!skb)
1084                 return -ENOMEM;
1085
1086         chan = (struct p54_scan *) skb_put(skb, sizeof(*chan));
1087         memset(chan->padding1, 0, sizeof(chan->padding1));
1088         chan->mode = cpu_to_le16(P54_SCAN_EXIT);
1089         chan->dwell = cpu_to_le16(0x0);
1090
1091         for (i = 0; i < priv->iq_autocal_len; i++) {
1092                 if (priv->iq_autocal[i].freq != freq)
1093                         continue;
1094
1095                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
1096                        sizeof(*priv->iq_autocal));
1097                 break;
1098         }
1099         if (i == priv->iq_autocal_len)
1100                 goto err;
1101
1102         for (i = 0; i < priv->output_limit_len; i++) {
1103                 if (priv->output_limit[i].freq != freq)
1104                         continue;
1105
1106                 chan->val_barker = 0x38;
1107                 chan->val_bpsk = chan->dup_bpsk =
1108                         priv->output_limit[i].val_bpsk;
1109                 chan->val_qpsk = chan->dup_qpsk =
1110                         priv->output_limit[i].val_qpsk;
1111                 chan->val_16qam = chan->dup_16qam =
1112                         priv->output_limit[i].val_16qam;
1113                 chan->val_64qam = chan->dup_64qam =
1114                         priv->output_limit[i].val_64qam;
1115                 break;
1116         }
1117         if (i == priv->output_limit_len)
1118                 goto err;
1119
1120         entry = priv->curve_data->data;
1121         for (i = 0; i < priv->curve_data->channels; i++) {
1122                 if (*((__le16 *)entry) != freq) {
1123                         entry += sizeof(__le16);
1124                         entry += sizeof(struct p54_pa_curve_data_sample) *
1125                                  priv->curve_data->points_per_channel;
1126                         continue;
1127                 }
1128
1129                 entry += sizeof(__le16);
1130                 chan->pa_points_per_curve =
1131                         min(priv->curve_data->points_per_channel, (u8) 8);
1132
1133                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
1134                        chan->pa_points_per_curve);
1135                 break;
1136         }
1137
1138         if (priv->fw_var < 0x500) {
1139                 chan->v1.rssical_mul = cpu_to_le16(130);
1140                 chan->v1.rssical_add = cpu_to_le16(0xfe70);
1141         } else {
1142                 chan->v2.rssical_mul = cpu_to_le16(130);
1143                 chan->v2.rssical_add = cpu_to_le16(0xfe70);
1144                 chan->v2.basic_rate_mask = cpu_to_le32(0x15f);
1145                 memset(chan->v2.rts_rates, 0, 8);
1146         }
1147         priv->tx(dev, skb, 1);
1148         return 0;
1149
1150  err:
1151         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
1152         kfree_skb(skb);
1153         return -EINVAL;
1154 }
1155
1156 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
1157 {
1158         struct p54_common *priv = dev->priv;
1159         struct sk_buff *skb;
1160         struct p54_led *led;
1161
1162         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
1163                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
1164                         GFP_ATOMIC);
1165         if (!skb)
1166                 return -ENOMEM;
1167
1168         led = (struct p54_led *)skb_put(skb, sizeof(*led));
1169         led->mode = cpu_to_le16(mode);
1170         led->led_permanent = cpu_to_le16(link);
1171         led->led_temporary = cpu_to_le16(act);
1172         led->duration = cpu_to_le16(1000);
1173         priv->tx(dev, skb, 1);
1174         return 0;
1175 }
1176
1177 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
1178 do {                                                            \
1179         queue.aifs = cpu_to_le16(ai_fs);                        \
1180         queue.cwmin = cpu_to_le16(cw_min);                      \
1181         queue.cwmax = cpu_to_le16(cw_max);                      \
1182         queue.txop = cpu_to_le16(_txop);                        \
1183 } while(0)
1184
1185 static int p54_set_edcf(struct ieee80211_hw *dev)
1186 {
1187         struct p54_common *priv = dev->priv;
1188         struct sk_buff *skb;
1189         struct p54_edcf *edcf;
1190
1191         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
1192                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
1193                         GFP_ATOMIC);
1194         if (!skb)
1195                 return -ENOMEM;
1196
1197         edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
1198         if (priv->use_short_slot) {
1199                 edcf->slottime = 9;
1200                 edcf->sifs = 0x10;
1201                 edcf->eofpad = 0x00;
1202         } else {
1203                 edcf->slottime = 20;
1204                 edcf->sifs = 0x0a;
1205                 edcf->eofpad = 0x06;
1206         }
1207         /* (see prism54/isl_oid.h for further details) */
1208         edcf->frameburst = cpu_to_le16(0);
1209         edcf->round_trip_delay = cpu_to_le16(0);
1210         memset(edcf->mapping, 0, sizeof(edcf->mapping));
1211         memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
1212         priv->tx(dev, skb, 1);
1213         return 0;
1214 }
1215
1216 static int p54_init_stats(struct ieee80211_hw *dev)
1217 {
1218         struct p54_common *priv = dev->priv;
1219
1220         priv->cached_stats = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL,
1221                         sizeof(struct p54_hdr) + sizeof(struct p54_statistics),
1222                         P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
1223         if (!priv->cached_stats)
1224                         return -ENOMEM;
1225
1226         mod_timer(&priv->stats_timer, jiffies + HZ);
1227         return 0;
1228 }
1229
1230 static int p54_start(struct ieee80211_hw *dev)
1231 {
1232         struct p54_common *priv = dev->priv;
1233         int err;
1234
1235         err = priv->open(dev);
1236         if (!err)
1237                 priv->mode = NL80211_IFTYPE_MONITOR;
1238         P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
1239         P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
1240         P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
1241         P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
1242         err = p54_set_edcf(dev);
1243         if (!err)
1244                 err = p54_init_stats(dev);
1245
1246         return err;
1247 }
1248
1249 static void p54_stop(struct ieee80211_hw *dev)
1250 {
1251         struct p54_common *priv = dev->priv;
1252         struct sk_buff *skb;
1253
1254         del_timer(&priv->stats_timer);
1255         p54_free_skb(dev, priv->cached_stats);
1256         priv->cached_stats = NULL;
1257         while ((skb = skb_dequeue(&priv->tx_queue)))
1258                 kfree_skb(skb);
1259
1260         priv->stop(dev);
1261         priv->tsf_high32 = priv->tsf_low32 = 0;
1262         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1263 }
1264
1265 static int p54_add_interface(struct ieee80211_hw *dev,
1266                              struct ieee80211_if_init_conf *conf)
1267 {
1268         struct p54_common *priv = dev->priv;
1269
1270         if (priv->mode != NL80211_IFTYPE_MONITOR)
1271                 return -EOPNOTSUPP;
1272
1273         switch (conf->type) {
1274         case NL80211_IFTYPE_STATION:
1275                 priv->mode = conf->type;
1276                 break;
1277         default:
1278                 return -EOPNOTSUPP;
1279         }
1280
1281         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1282
1283         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1284
1285         switch (conf->type) {
1286         case NL80211_IFTYPE_STATION:
1287                 p54_setup_mac(dev, P54_FILTER_TYPE_STATION, NULL);
1288                 break;
1289         default:
1290                 BUG();  /* impossible */
1291                 break;
1292         }
1293
1294         p54_set_leds(dev, 1, 0, 0);
1295
1296         return 0;
1297 }
1298
1299 static void p54_remove_interface(struct ieee80211_hw *dev,
1300                                  struct ieee80211_if_init_conf *conf)
1301 {
1302         struct p54_common *priv = dev->priv;
1303         priv->mode = NL80211_IFTYPE_MONITOR;
1304         memset(priv->mac_addr, 0, ETH_ALEN);
1305         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1306 }
1307
1308 static int p54_config(struct ieee80211_hw *dev, u32 changed)
1309 {
1310         int ret;
1311         struct p54_common *priv = dev->priv;
1312         struct ieee80211_conf *conf = &dev->conf;
1313
1314         mutex_lock(&priv->conf_mutex);
1315         priv->rx_antenna = 2; /* automatic */
1316         priv->output_power = conf->power_level << 2;
1317         ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
1318         if (!ret)
1319                 ret = p54_set_edcf(dev);
1320         mutex_unlock(&priv->conf_mutex);
1321         return ret;
1322 }
1323
1324 static int p54_config_interface(struct ieee80211_hw *dev,
1325                                 struct ieee80211_vif *vif,
1326                                 struct ieee80211_if_conf *conf)
1327 {
1328         struct p54_common *priv = dev->priv;
1329
1330         mutex_lock(&priv->conf_mutex);
1331         p54_setup_mac(dev, P54_FILTER_TYPE_STATION, conf->bssid);
1332         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
1333         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1334         mutex_unlock(&priv->conf_mutex);
1335         return 0;
1336 }
1337
1338 static void p54_configure_filter(struct ieee80211_hw *dev,
1339                                  unsigned int changed_flags,
1340                                  unsigned int *total_flags,
1341                                  int mc_count, struct dev_mc_list *mclist)
1342 {
1343         struct p54_common *priv = dev->priv;
1344
1345         *total_flags &= FIF_BCN_PRBRESP_PROMISC |
1346                         FIF_PROMISC_IN_BSS |
1347                         FIF_FCSFAIL;
1348
1349         priv->filter_flags = *total_flags;
1350
1351         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1352                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1353                         p54_setup_mac(dev, priv->mac_mode, NULL);
1354                 else
1355                         p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1356         }
1357
1358         if (changed_flags & FIF_PROMISC_IN_BSS) {
1359                 if (*total_flags & FIF_PROMISC_IN_BSS)
1360                         p54_setup_mac(dev, priv->mac_mode | 0x8, NULL);
1361                 else
1362                         p54_setup_mac(dev, priv->mac_mode & ~0x8, priv->bssid);
1363         }
1364 }
1365
1366 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1367                        const struct ieee80211_tx_queue_params *params)
1368 {
1369         struct p54_common *priv = dev->priv;
1370
1371         if ((params) && !(queue > 4)) {
1372                 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
1373                         params->cw_min, params->cw_max, params->txop);
1374         } else
1375                 return -EINVAL;
1376
1377         return p54_set_edcf(dev);
1378 }
1379
1380 static int p54_init_xbow_synth(struct ieee80211_hw *dev)
1381 {
1382         struct p54_common *priv = dev->priv;
1383         struct sk_buff *skb;
1384         struct p54_xbow_synth *xbow;
1385
1386         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
1387                             sizeof(struct p54_hdr),
1388                             P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
1389                             GFP_KERNEL);
1390         if (!skb)
1391                 return -ENOMEM;
1392
1393         xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
1394         xbow->magic1 = cpu_to_le16(0x1);
1395         xbow->magic2 = cpu_to_le16(0x2);
1396         xbow->freq = cpu_to_le16(5390);
1397         memset(xbow->padding, 0, sizeof(xbow->padding));
1398         priv->tx(dev, skb, 1);
1399         return 0;
1400 }
1401
1402 static void p54_statistics_timer(unsigned long data)
1403 {
1404         struct ieee80211_hw *dev = (struct ieee80211_hw *) data;
1405         struct p54_common *priv = dev->priv;
1406
1407         BUG_ON(!priv->cached_stats);
1408
1409         priv->tx(dev, priv->cached_stats, 0);
1410 }
1411
1412 static int p54_get_stats(struct ieee80211_hw *dev,
1413                          struct ieee80211_low_level_stats *stats)
1414 {
1415         struct p54_common *priv = dev->priv;
1416
1417         del_timer(&priv->stats_timer);
1418         p54_statistics_timer((unsigned long)dev);
1419
1420         if (!wait_for_completion_interruptible_timeout(&priv->stats_comp, HZ)) {
1421                 printk(KERN_ERR "%s: device does not respond!\n",
1422                         wiphy_name(dev->wiphy));
1423                 return -EBUSY;
1424         }
1425
1426         memcpy(stats, &priv->stats, sizeof(*stats));
1427
1428         return 0;
1429 }
1430
1431 static int p54_get_tx_stats(struct ieee80211_hw *dev,
1432                             struct ieee80211_tx_queue_stats *stats)
1433 {
1434         struct p54_common *priv = dev->priv;
1435
1436         memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
1437
1438         return 0;
1439 }
1440
1441 static void p54_bss_info_changed(struct ieee80211_hw *dev,
1442                                  struct ieee80211_vif *vif,
1443                                  struct ieee80211_bss_conf *info,
1444                                  u32 changed)
1445 {
1446         struct p54_common *priv = dev->priv;
1447
1448         if (changed & BSS_CHANGED_ERP_SLOT) {
1449                 priv->use_short_slot = info->use_short_slot;
1450                 p54_set_edcf(dev);
1451         }
1452 }
1453
1454 static const struct ieee80211_ops p54_ops = {
1455         .tx                     = p54_tx,
1456         .start                  = p54_start,
1457         .stop                   = p54_stop,
1458         .add_interface          = p54_add_interface,
1459         .remove_interface       = p54_remove_interface,
1460         .config                 = p54_config,
1461         .config_interface       = p54_config_interface,
1462         .bss_info_changed       = p54_bss_info_changed,
1463         .configure_filter       = p54_configure_filter,
1464         .conf_tx                = p54_conf_tx,
1465         .get_stats              = p54_get_stats,
1466         .get_tx_stats           = p54_get_tx_stats
1467 };
1468
1469 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
1470 {
1471         struct ieee80211_hw *dev;
1472         struct p54_common *priv;
1473
1474         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1475         if (!dev)
1476                 return NULL;
1477
1478         priv = dev->priv;
1479         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1480         skb_queue_head_init(&priv->tx_queue);
1481         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
1482                      IEEE80211_HW_RX_INCLUDES_FCS |
1483                      IEEE80211_HW_SIGNAL_DBM |
1484                      IEEE80211_HW_NOISE_DBM;
1485
1486         /*
1487          * XXX: when this driver gets support for any mode that
1488          *      requires beacons (AP, MESH, IBSS) then it must
1489          *      implement IEEE80211_TX_CTL_ASSIGN_SEQ.
1490          */
1491         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1492
1493         dev->channel_change_time = 1000;        /* TODO: find actual value */
1494         priv->tx_stats[0].limit = 1;
1495         priv->tx_stats[1].limit = 1;
1496         priv->tx_stats[2].limit = 1;
1497         priv->tx_stats[3].limit = 1;
1498         priv->tx_stats[4].limit = 5;
1499         dev->queues = 1;
1500         priv->noise = -94;
1501         /*
1502          * We support at most 8 tries no matter which rate they're at,
1503          * we cannot support max_rates * max_rate_tries as we set it
1504          * here, but setting it correctly to 4/2 or so would limit us
1505          * artificially if the RC algorithm wants just two rates, so
1506          * let's say 4/7, we'll redistribute it at TX time, see the
1507          * comments there.
1508          */
1509         dev->max_rates = 4;
1510         dev->max_rate_tries = 7;
1511         dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
1512                                  sizeof(struct p54_tx_data);
1513
1514         mutex_init(&priv->conf_mutex);
1515         init_completion(&priv->eeprom_comp);
1516         init_completion(&priv->stats_comp);
1517         setup_timer(&priv->stats_timer, p54_statistics_timer,
1518                 (unsigned long)dev);
1519
1520         return dev;
1521 }
1522 EXPORT_SYMBOL_GPL(p54_init_common);
1523
1524 void p54_free_common(struct ieee80211_hw *dev)
1525 {
1526         struct p54_common *priv = dev->priv;
1527         del_timer(&priv->stats_timer);
1528         kfree_skb(priv->cached_stats);
1529         kfree(priv->iq_autocal);
1530         kfree(priv->output_limit);
1531         kfree(priv->curve_data);
1532 }
1533 EXPORT_SYMBOL_GPL(p54_free_common);
1534
1535 static int __init p54_init(void)
1536 {
1537         return 0;
1538 }
1539
1540 static void __exit p54_exit(void)
1541 {
1542 }
1543
1544 module_init(p54_init);
1545 module_exit(p54_exit);