drivers/net/wireless/p54/p54common.c

   1
   2 /*
   3  * Common code for mac80211 Prism54 drivers
   4  *
   5  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   6  * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
   7  *
   8  * Based on the islsm (softmac prism54) driver, which is:
   9  * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/firmware.h>
  18 #include <linux/etherdevice.h>
  19
  20 #include <net/mac80211.h>
  21
  22 #include "p54.h"
  23 #include "p54common.h"
  24
  25 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  26 MODULE_DESCRIPTION("Softmac Prism54 common code");
  27 MODULE_LICENSE("GPL");
  28 MODULE_ALIAS("prism54common");
  29
  30 static struct ieee80211_rate p54_rates[] = {
  31         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  32         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  33         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  34         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  35         { .bitrate = 60, .hw_value = 4, },
  36         { .bitrate = 90, .hw_value = 5, },
  37         { .bitrate = 120, .hw_value = 6, },
  38         { .bitrate = 180, .hw_value = 7, },
  39         { .bitrate = 240, .hw_value = 8, },
  40         { .bitrate = 360, .hw_value = 9, },
  41         { .bitrate = 480, .hw_value = 10, },
  42         { .bitrate = 540, .hw_value = 11, },
  43 };
  44
  45 static struct ieee80211_channel p54_channels[] = {
  46         { .center_freq = 2412, .hw_value = 1, },
  47         { .center_freq = 2417, .hw_value = 2, },
  48         { .center_freq = 2422, .hw_value = 3, },
  49         { .center_freq = 2427, .hw_value = 4, },
  50         { .center_freq = 2432, .hw_value = 5, },
  51         { .center_freq = 2437, .hw_value = 6, },
  52         { .center_freq = 2442, .hw_value = 7, },
  53         { .center_freq = 2447, .hw_value = 8, },
  54         { .center_freq = 2452, .hw_value = 9, },
  55         { .center_freq = 2457, .hw_value = 10, },
  56         { .center_freq = 2462, .hw_value = 11, },
  57         { .center_freq = 2467, .hw_value = 12, },
  58         { .center_freq = 2472, .hw_value = 13, },
  59         { .center_freq = 2484, .hw_value = 14, },
  60 };
  61
  62 static struct ieee80211_supported_band band_2GHz = {
  63         .channels = p54_channels,
  64         .n_channels = ARRAY_SIZE(p54_channels),
  65         .bitrates = p54_rates,
  66         .n_bitrates = ARRAY_SIZE(p54_rates),
  67 };
  68
  69 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
  70 {
  71         struct p54_common *priv = dev->priv;
  72         struct bootrec_exp_if *exp_if;
  73         struct bootrec *bootrec;
  74         u32 *data = (u32 *)fw->data;
  75         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
  76         u8 *fw_version = NULL;
  77         size_t len;
  78         int i;
  79
  80         if (priv->rx_start)
  81                 return 0;
  82
  83         while (data < end_data && *data)
  84                 data++;
  85
  86         while (data < end_data && !*data)
  87                 data++;
  88
  89         bootrec = (struct bootrec *) data;
  90
  91         while (bootrec->data <= end_data &&
  92                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
  93                 u32 code = le32_to_cpu(bootrec->code);
  94                 switch (code) {
  95                 case BR_CODE_COMPONENT_ID:
  96                         priv->fw_interface = be32_to_cpup(bootrec->data);
  97                         switch (priv->fw_interface) {
  98                         case FW_FMAC:
  99                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
 100                                 break;
 101                         case FW_LM20:
 102                                 printk(KERN_INFO "p54: LM20 firmware\n");
 103                                 break;
 104                         case FW_LM86:
 105                                 printk(KERN_INFO "p54: LM86 firmware\n");
 106                                 break;
 107                         case FW_LM87:
 108                                 printk(KERN_INFO "p54: LM87 firmware\n");
 109                                 break;
 110                         default:
 111                                 printk(KERN_INFO "p54: unknown firmware\n");
 112                                 break;
 113                         }
 114                         break;
 115                 case BR_CODE_COMPONENT_VERSION:
 116                         /* 24 bytes should be enough for all firmwares */
 117                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
 118                                 fw_version = (unsigned char*)bootrec->data;
 119                         break;
 120                 case BR_CODE_DESCR: {
 121                         struct bootrec_desc *desc =
 122                                 (struct bootrec_desc *)bootrec->data;
 123                         priv->rx_start = le32_to_cpu(desc->rx_start);
 124                         /* FIXME add sanity checking */
 125                         priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
 126                         priv->headroom = desc->headroom;
 127                         priv->tailroom = desc->tailroom;
 128                         if (bootrec->len == 11)
 129                                 priv->rx_mtu = (size_t) le16_to_cpu(
 130                                         (__le16)bootrec->data[10]);
 131                         else
 132                                 priv->rx_mtu = (size_t)
 133                                         0x620 - priv->tx_hdr_len;
 134                         break;
 135                         }
 136                 case BR_CODE_EXPOSED_IF:
 137                         exp_if = (struct bootrec_exp_if *) bootrec->data;
 138                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
 139                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
 140                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
 141                         break;
 142                 case BR_CODE_DEPENDENT_IF:
 143                         break;
 144                 case BR_CODE_END_OF_BRA:
 145                 case LEGACY_BR_CODE_END_OF_BRA:
 146                         end_data = NULL;
 147                         break;
 148                 default:
 149                         break;
 150                 }
 151                 bootrec = (struct bootrec *)&bootrec->data[len];
 152         }
 153
 154         if (fw_version)
 155                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
 156                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
 157
 158         if (priv->fw_var >= 0x300) {
 159                 /* Firmware supports QoS, use it! */
 160                 priv->tx_stats[4].limit = 3;
 161                 priv->tx_stats[5].limit = 4;
 162                 priv->tx_stats[6].limit = 3;
 163                 priv->tx_stats[7].limit = 1;
 164                 dev->queues = 4;
 165         }
 166
 167         return 0;
 168 }
 169 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 170
 171 static int p54_convert_rev0(struct ieee80211_hw *dev,
 172                             struct pda_pa_curve_data *curve_data)
 173 {
 174         struct p54_common *priv = dev->priv;
 175         struct p54_pa_curve_data_sample *dst;
 176         struct pda_pa_curve_data_sample_rev0 *src;
 177         size_t cd_len = sizeof(*curve_data) +
 178                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 179                  curve_data->channels;
 180         unsigned int i, j;
 181         void *source, *target;
 182
 183         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 184         if (!priv->curve_data)
 185                 return -ENOMEM;
 186
 187         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 188         source = curve_data->data;
 189         target = priv->curve_data->data;
 190         for (i = 0; i < curve_data->channels; i++) {
 191                 __le16 *freq = source;
 192                 source += sizeof(__le16);
 193                 *((__le16 *)target) = *freq;
 194                 target += sizeof(__le16);
 195                 for (j = 0; j < curve_data->points_per_channel; j++) {
 196                         dst = target;
 197                         src = source;
 198
 199                         dst->rf_power = src->rf_power;
 200                         dst->pa_detector = src->pa_detector;
 201                         dst->data_64qam = src->pcv;
 202                         /* "invent" the points for the other modulations */
 203 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 204                         dst->data_16qam = SUB(src->pcv, 12);
 205                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 206                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 207                         dst->data_barker = SUB(dst->data_bpsk, 14);
 208 #undef SUB
 209                         target += sizeof(*dst);
 210                         source += sizeof(*src);
 211                 }
 212         }
 213
 214         return 0;
 215 }
 216
 217 static int p54_convert_rev1(struct ieee80211_hw *dev,
 218                             struct pda_pa_curve_data *curve_data)
 219 {
 220         struct p54_common *priv = dev->priv;
 221         struct p54_pa_curve_data_sample *dst;
 222         struct pda_pa_curve_data_sample_rev1 *src;
 223         size_t cd_len = sizeof(*curve_data) +
 224                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 225                  curve_data->channels;
 226         unsigned int i, j;
 227         void *source, *target;
 228
 229         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 230         if (!priv->curve_data)
 231                 return -ENOMEM;
 232
 233         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 234         source = curve_data->data;
 235         target = priv->curve_data->data;
 236         for (i = 0; i < curve_data->channels; i++) {
 237                 __le16 *freq = source;
 238                 source += sizeof(__le16);
 239                 *((__le16 *)target) = *freq;
 240                 target += sizeof(__le16);
 241                 for (j = 0; j < curve_data->points_per_channel; j++) {
 242                         memcpy(target, source, sizeof(*src));
 243
 244                         target += sizeof(*dst);
 245                         source += sizeof(*src);
 246                 }
 247                 source++;
 248         }
 249
 250         return 0;
 251 }
 252
 253 const char* p54_rf_chips[] = { "NULL", "Indigo?", "Duette",
 254                               "Frisbee", "Xbow", "Longbow" };
 255
 256 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 257 {
 258         struct p54_common *priv = dev->priv;
 259         struct eeprom_pda_wrap *wrap = NULL;
 260         struct pda_entry *entry;
 261         unsigned int data_len, entry_len;
 262         void *tmp;
 263         int err;
 264         u8 *end = (u8 *)eeprom + len;
 265         DECLARE_MAC_BUF(mac);
 266
 267         wrap = (struct eeprom_pda_wrap *) eeprom;
 268         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 269
 270         /* verify that at least the entry length/code fits */
 271         while ((u8 *)entry <= end - sizeof(*entry)) {
 272                 entry_len = le16_to_cpu(entry->len);
 273                 data_len = ((entry_len - 1) << 1);
 274
 275                 /* abort if entry exceeds whole structure */
 276                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 277                         break;
 278
 279                 switch (le16_to_cpu(entry->code)) {
 280                 case PDR_MAC_ADDRESS:
 281                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 282                         break;
 283                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 284                         if (data_len < 2) {
 285                                 err = -EINVAL;
 286                                 goto err;
 287                         }
 288
 289                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 290                                 err = -EINVAL;
 291                                 goto err;
 292                         }
 293
 294                         priv->output_limit = kmalloc(entry->data[1] *
 295                                 sizeof(*priv->output_limit), GFP_KERNEL);
 296
 297                         if (!priv->output_limit) {
 298                                 err = -ENOMEM;
 299                                 goto err;
 300                         }
 301
 302                         memcpy(priv->output_limit, &entry->data[2],
 303                                entry->data[1]*sizeof(*priv->output_limit));
 304                         priv->output_limit_len = entry->data[1];
 305                         break;
 306                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 307                         struct pda_pa_curve_data *curve_data =
 308                                 (struct pda_pa_curve_data *)entry->data;
 309                         if (data_len < sizeof(*curve_data)) {
 310                                 err = -EINVAL;
 311                                 goto err;
 312                         }
 313
 314                         switch (curve_data->cal_method_rev) {
 315                         case 0:
 316                                 err = p54_convert_rev0(dev, curve_data);
 317                                 break;
 318                         case 1:
 319                                 err = p54_convert_rev1(dev, curve_data);
 320                                 break;
 321                         default:
 322                                 printk(KERN_ERR "p54: unknown curve data "
 323                                                 "revision %d\n",
 324                                                 curve_data->cal_method_rev);
 325                                 err = -ENODEV;
 326                                 break;
 327                         }
 328                         if (err)
 329                                 goto err;
 330
 331                 }
 332                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 333                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 334                         if (!priv->iq_autocal) {
 335                                 err = -ENOMEM;
 336                                 goto err;
 337                         }
 338
 339                         memcpy(priv->iq_autocal, entry->data, data_len);
 340                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 341                         break;
 342                 case PDR_INTERFACE_LIST:
 343                         tmp = entry->data;
 344                         while ((u8 *)tmp < entry->data + data_len) {
 345                                 struct bootrec_exp_if *exp_if = tmp;
 346                                 if (le16_to_cpu(exp_if->if_id) == 0xF)
 347                                         priv->rxhw = le16_to_cpu(exp_if->variant) & 0x07;
 348                                 tmp += sizeof(struct bootrec_exp_if);
 349                         }
 350                         break;
 351                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 352                         priv->version = *(u8 *)(entry->data + 1);
 353                         break;
 354                 case PDR_END:
 355                         /* make it overrun */
 356                         entry_len = len;
 357                         break;
 358                 default:
 359                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
 360                                 le16_to_cpu(entry->code));
 361                         break;
 362                 }
 363
 364                 entry = (void *)entry + (entry_len + 1)*2;
 365         }
 366
 367         if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
 368                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 369                 err = -EINVAL;
 370                 goto err;
 371         }
 372
 373         switch (priv->rxhw) {
 374                 case 4: /* XBow */
 375                 case 1: /* Indigo? */
 376                 case 2: /* Duette */
 377                         /* TODO: 5GHz initialization goes here */
 378
 379                 case 3: /* Frisbee */
 380                 case 5: /* Longbow */
 381                         dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 382                         break;
 383                 default:
 384                         printk(KERN_ERR "%s: unsupported RF-Chip\n",
 385                                 wiphy_name(dev->wiphy));
 386                         err = -EINVAL;
 387                         goto err;
 388         }
 389
 390         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 391                 u8 perm_addr[ETH_ALEN];
 392
 393                 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
 394                         wiphy_name(dev->wiphy));
 395                 random_ether_addr(perm_addr);
 396                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 397         }
 398
 399         printk(KERN_INFO "%s: hwaddr %s, MAC:isl38%02x RF:%s\n",
 400                 wiphy_name(dev->wiphy),
 401                 print_mac(mac, dev->wiphy->perm_addr),
 402                 priv->version, p54_rf_chips[priv->rxhw]);
 403
 404         return 0;
 405
 406   err:
 407         if (priv->iq_autocal) {
 408                 kfree(priv->iq_autocal);
 409                 priv->iq_autocal = NULL;
 410         }
 411
 412         if (priv->output_limit) {
 413                 kfree(priv->output_limit);
 414                 priv->output_limit = NULL;
 415         }
 416
 417         if (priv->curve_data) {
 418                 kfree(priv->curve_data);
 419                 priv->curve_data = NULL;
 420         }
 421
 422         printk(KERN_ERR "p54: eeprom parse failed!\n");
 423         return err;
 424 }
 425 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 426
 427 static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 428 {
 429         struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
 430         struct ieee80211_rx_status rx_status = {0};
 431         u16 freq = le16_to_cpu(hdr->freq);
 432         size_t header_len = sizeof(*hdr);
 433
 434         rx_status.signal = hdr->rssi;
 435         /* XX correct? */
 436         rx_status.qual = (100 * hdr->rssi) / 127;
 437         rx_status.rate_idx = hdr->rate & 0xf;
 438         rx_status.freq = freq;
 439         rx_status.band = IEEE80211_BAND_2GHZ;
 440         rx_status.antenna = hdr->antenna;
 441         rx_status.mactime = le64_to_cpu(hdr->timestamp);
 442         rx_status.flag |= RX_FLAG_TSFT;
 443
 444         if (hdr->magic & cpu_to_le16(0x4000))
 445                 header_len += hdr->align[0];
 446
 447         skb_pull(skb, header_len);
 448         skb_trim(skb, le16_to_cpu(hdr->len));
 449
 450         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 451
 452         return -1;
 453 }
 454
 455 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 456 {
 457         struct p54_common *priv = dev->priv;
 458         int i;
 459
 460         for (i = 0; i < dev->queues; i++)
 461                 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
 462                         ieee80211_wake_queue(dev, i);
 463 }
 464
 465 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 466 {
 467         struct p54_common *priv = dev->priv;
 468         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 469         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
 470         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 471         u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
 472         struct memrecord *range = NULL;
 473         u32 freed = 0;
 474         u32 last_addr = priv->rx_start;
 475         unsigned long flags;
 476
 477         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 478         while (entry != (struct sk_buff *)&priv->tx_queue) {
 479                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 480                 range = (void *)info->driver_data;
 481                 if (range->start_addr == addr) {
 482                         struct p54_control_hdr *entry_hdr;
 483                         struct p54_tx_control_allocdata *entry_data;
 484                         int pad = 0;
 485
 486                         if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 487                                 struct ieee80211_tx_info *ni;
 488                                 struct memrecord *mr;
 489
 490                                 ni = IEEE80211_SKB_CB(entry->next);
 491                                 mr = (struct memrecord *)ni->driver_data;
 492                                 freed = mr->start_addr - last_addr;
 493                         } else
 494                                 freed = priv->rx_end - last_addr;
 495
 496                         last_addr = range->end_addr;
 497                         __skb_unlink(entry, &priv->tx_queue);
 498                         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 499
 500                         memset(&info->status, 0, sizeof(info->status));
 501                         entry_hdr = (struct p54_control_hdr *) entry->data;
 502                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
 503                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
 504                                 pad = entry_data->align[0];
 505
 506                         priv->tx_stats[entry_data->hw_queue].len--;
 507                         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 508                                 if (!(payload->status & 0x01))
 509                                         info->flags |= IEEE80211_TX_STAT_ACK;
 510                                 else
 511                                         info->status.excessive_retries = 1;
 512                         }
 513                         info->status.retry_count = payload->retries - 1;
 514                         info->status.ack_signal = le16_to_cpu(payload->ack_rssi);
 515                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 516                         ieee80211_tx_status_irqsafe(dev, entry);
 517                         goto out;
 518                 } else
 519                         last_addr = range->end_addr;
 520                 entry = entry->next;
 521         }
 522         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 523
 524 out:
 525         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 526             sizeof(struct p54_control_hdr))
 527                 p54_wake_free_queues(dev);
 528 }
 529
 530 static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
 531                                    struct sk_buff *skb)
 532 {
 533         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 534         struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
 535         struct p54_common *priv = dev->priv;
 536
 537         if (!priv->eeprom)
 538                 return ;
 539
 540         memcpy(priv->eeprom, eeprom->data, eeprom->len);
 541
 542         complete(&priv->eeprom_comp);
 543 }
 544
 545 static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 546 {
 547         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 548
 549         switch (le16_to_cpu(hdr->type)) {
 550         case P54_CONTROL_TYPE_TXDONE:
 551                 p54_rx_frame_sent(dev, skb);
 552                 break;
 553         case P54_CONTROL_TYPE_BBP:
 554                 break;
 555         case P54_CONTROL_TYPE_EEPROM_READBACK:
 556                 p54_rx_eeprom_readback(dev, skb);
 557                 break;
 558         default:
 559                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 560                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 561                 break;
 562         }
 563
 564         return 0;
 565 }
 566
 567 /* returns zero if skb can be reused */
 568 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 569 {
 570         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
 571
 572         if (type == 0x80)
 573                 return p54_rx_control(dev, skb);
 574         else
 575                 return p54_rx_data(dev, skb);
 576 }
 577 EXPORT_SYMBOL_GPL(p54_rx);
 578
 579 /*
 580  * So, the firmware is somewhat stupid and doesn't know what places in its
 581  * memory incoming data should go to. By poking around in the firmware, we
 582  * can find some unused memory to upload our packets to. However, data that we
 583  * want the card to TX needs to stay intact until the card has told us that
 584  * it is done with it. This function finds empty places we can upload to and
 585  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 586  * allocated areas.
 587  */
 588 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 589                                struct p54_control_hdr *data, u32 len)
 590 {
 591         struct p54_common *priv = dev->priv;
 592         struct sk_buff *entry = priv->tx_queue.next;
 593         struct sk_buff *target_skb = NULL;
 594         u32 last_addr = priv->rx_start;
 595         u32 largest_hole = 0;
 596         u32 target_addr = priv->rx_start;
 597         unsigned long flags;
 598         unsigned int left;
 599         len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
 600
 601         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 602         left = skb_queue_len(&priv->tx_queue);
 603         while (left--) {
 604                 u32 hole_size;
 605                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 606                 struct memrecord *range = (void *)info->driver_data;
 607                 hole_size = range->start_addr - last_addr;
 608                 if (!target_skb && hole_size >= len) {
 609                         target_skb = entry->prev;
 610                         hole_size -= len;
 611                         target_addr = last_addr;
 612                 }
 613                 largest_hole = max(largest_hole, hole_size);
 614                 last_addr = range->end_addr;
 615                 entry = entry->next;
 616         }
 617         if (!target_skb && priv->rx_end - last_addr >= len) {
 618                 target_skb = priv->tx_queue.prev;
 619                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 620                 if (!skb_queue_empty(&priv->tx_queue)) {
 621                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(target_skb);
 622                         struct memrecord *range = (void *)info->driver_data;
 623                         target_addr = range->end_addr;
 624                 }
 625         } else
 626                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 627
 628         if (skb) {
 629                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 630                 struct memrecord *range = (void *)info->driver_data;
 631                 range->start_addr = target_addr;
 632                 range->end_addr = target_addr + len;
 633                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
 634                 if (largest_hole < priv->rx_mtu + priv->headroom +
 635                                    priv->tailroom +
 636                                    sizeof(struct p54_control_hdr))
 637                         ieee80211_stop_queues(dev);
 638         }
 639         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 640
 641         data->req_id = cpu_to_le32(target_addr + priv->headroom);
 642 }
 643
 644 int p54_read_eeprom(struct ieee80211_hw *dev)
 645 {
 646         struct p54_common *priv = dev->priv;
 647         struct p54_control_hdr *hdr = NULL;
 648         struct p54_eeprom_lm86 *eeprom_hdr;
 649         size_t eeprom_size = 0x2020, offset = 0, blocksize;
 650         int ret = -ENOMEM;
 651         void *eeprom = NULL;
 652
 653         hdr = (struct p54_control_hdr *)kzalloc(sizeof(*hdr) +
 654                 sizeof(*eeprom_hdr) + EEPROM_READBACK_LEN, GFP_KERNEL);
 655         if (!hdr)
 656                 goto free;
 657
 658         priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
 659         if (!priv->eeprom)
 660                 goto free;
 661
 662         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 663         if (!eeprom)
 664                 goto free;
 665
 666         hdr->magic1 = cpu_to_le16(0x8000);
 667         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
 668         hdr->retry1 = hdr->retry2 = 0;
 669         eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
 670
 671         while (eeprom_size) {
 672                 blocksize = min(eeprom_size, (size_t)EEPROM_READBACK_LEN);
 673                 hdr->len = cpu_to_le16(blocksize + sizeof(*eeprom_hdr));
 674                 eeprom_hdr->offset = cpu_to_le16(offset);
 675                 eeprom_hdr->len = cpu_to_le16(blocksize);
 676                 p54_assign_address(dev, NULL, hdr, hdr->len + sizeof(*hdr));
 677                 priv->tx(dev, hdr, hdr->len + sizeof(*hdr), 0);
 678
 679                 if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
 680                         printk(KERN_ERR "%s: device does not respond!\n",
 681                                 wiphy_name(dev->wiphy));
 682                         ret = -EBUSY;
 683                         goto free;
 684                 }
 685
 686                 memcpy(eeprom + offset, priv->eeprom, blocksize);
 687                 offset += blocksize;
 688                 eeprom_size -= blocksize;
 689         }
 690
 691         ret = p54_parse_eeprom(dev, eeprom, offset);
 692 free:
 693         kfree(priv->eeprom);
 694         priv->eeprom = NULL;
 695         kfree(hdr);
 696         kfree(eeprom);
 697
 698         return ret;
 699 }
 700 EXPORT_SYMBOL_GPL(p54_read_eeprom);
 701
 702 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 703 {
 704         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 705         struct ieee80211_tx_queue_stats *current_queue;
 706         struct p54_common *priv = dev->priv;
 707         struct p54_control_hdr *hdr;
 708         struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
 709         struct p54_tx_control_allocdata *txhdr;
 710         size_t padding, len;
 711         u8 rate;
 712         u8 cts_rate = 0x20;
 713
 714         current_queue = &priv->tx_stats[skb_get_queue_mapping(skb) + 4];
 715         if (unlikely(current_queue->len > current_queue->limit))
 716                 return NETDEV_TX_BUSY;
 717         current_queue->len++;
 718         current_queue->count++;
 719         if (current_queue->len == current_queue->limit)
 720                 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
 721
 722         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 723         len = skb->len;
 724
 725         txhdr = (struct p54_tx_control_allocdata *)
 726                         skb_push(skb, sizeof(*txhdr) + padding);
 727         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
 728
 729         if (padding)
 730                 hdr->magic1 = cpu_to_le16(0x4010);
 731         else
 732                 hdr->magic1 = cpu_to_le16(0x0010);
 733         hdr->len = cpu_to_le16(len);
 734         hdr->type = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 0 : cpu_to_le16(1);
 735         hdr->retry1 = hdr->retry2 = info->control.retry_limit;
 736
 737         /* TODO: add support for alternate retry TX rates */
 738         rate = ieee80211_get_tx_rate(dev, info)->hw_value;
 739         if (info->flags & IEEE80211_TX_CTL_SHORT_PREAMBLE) {
 740                 rate |= 0x10;
 741                 cts_rate |= 0x10;
 742         }
 743         if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
 744                 rate |= 0x40;
 745                 cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
 746         } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
 747                 rate |= 0x20;
 748                 cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
 749         }
 750         memset(txhdr->rateset, rate, 8);
 751         txhdr->key_type = 0;
 752         txhdr->key_len = 0;
 753         txhdr->hw_queue = skb_get_queue_mapping(skb) + 4;
 754         txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
 755                 2 : info->antenna_sel_tx - 1;
 756         txhdr->output_power = 0x7f; // HW Maximum
 757         txhdr->cts_rate = (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
 758                           0 : cts_rate;
 759         if (padding)
 760                 txhdr->align[0] = padding;
 761
 762         /* FIXME: The sequence that follows is needed for this driver to
 763          * work with mac80211 since "mac80211: fix TX sequence numbers".
 764          * As with the temporary code in rt2x00, changes will be needed
 765          * to get proper sequence numbers on beacons. In addition, this
 766          * patch places the sequence number in the hardware state, which
 767          * limits us to a single virtual state.
 768          */
 769         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 770                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 771                         priv->seqno += 0x10;
 772                 ieee80211hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 773                 ieee80211hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
 774         }
 775         /* modifies skb->cb and with it info, so must be last! */
 776         p54_assign_address(dev, skb, hdr, skb->len);
 777
 778         priv->tx(dev, hdr, skb->len, 0);
 779         return 0;
 780 }
 781
 782 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
 783                           const u8 *bssid)
 784 {
 785         struct p54_common *priv = dev->priv;
 786         struct p54_control_hdr *hdr;
 787         struct p54_tx_control_filter *filter;
 788         size_t data_len;
 789
 790         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
 791                       priv->tx_hdr_len, GFP_ATOMIC);
 792         if (!hdr)
 793                 return -ENOMEM;
 794
 795         hdr = (void *)hdr + priv->tx_hdr_len;
 796
 797         filter = (struct p54_tx_control_filter *) hdr->data;
 798         hdr->magic1 = cpu_to_le16(0x8001);
 799         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
 800
 801         priv->filter_type = filter->filter_type = cpu_to_le16(filter_type);
 802         memcpy(filter->mac_addr, priv->mac_addr, ETH_ALEN);
 803         if (!bssid)
 804                 memset(filter->bssid, ~0, ETH_ALEN);
 805         else
 806                 memcpy(filter->bssid, bssid, ETH_ALEN);
 807
 808         filter->rx_antenna = priv->rx_antenna;
 809
 810         if (priv->fw_var < 0x500) {
 811                 data_len = P54_TX_CONTROL_FILTER_V1_LEN;
 812                 filter->v1.basic_rate_mask = cpu_to_le32(0x15F);
 813                 filter->v1.rx_addr = cpu_to_le32(priv->rx_end);
 814                 filter->v1.max_rx = cpu_to_le16(priv->rx_mtu);
 815                 filter->v1.rxhw = cpu_to_le16(priv->rxhw);
 816                 filter->v1.wakeup_timer = cpu_to_le16(500);
 817         } else {
 818                 data_len = P54_TX_CONTROL_FILTER_V2_LEN;
 819                 filter->v2.rx_addr = cpu_to_le32(priv->rx_end);
 820                 filter->v2.max_rx = cpu_to_le16(priv->rx_mtu);
 821                 filter->v2.rxhw = cpu_to_le16(priv->rxhw);
 822                 filter->v2.timer = cpu_to_le16(1000);
 823         }
 824
 825         hdr->len = cpu_to_le16(data_len);
 826         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + data_len);
 827         priv->tx(dev, hdr, sizeof(*hdr) + data_len, 1);
 828         return 0;
 829 }
 830
 831 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
 832 {
 833         struct p54_common *priv = dev->priv;
 834         struct p54_control_hdr *hdr;
 835         struct p54_tx_control_channel *chan;
 836         unsigned int i;
 837         size_t data_len;
 838         void *entry;
 839
 840         hdr = kzalloc(sizeof(*hdr) + sizeof(*chan) +
 841                       priv->tx_hdr_len, GFP_KERNEL);
 842         if (!hdr)
 843                 return -ENOMEM;
 844
 845         hdr = (void *)hdr + priv->tx_hdr_len;
 846
 847         chan = (struct p54_tx_control_channel *) hdr->data;
 848
 849         hdr->magic1 = cpu_to_le16(0x8001);
 850
 851         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
 852
 853         chan->flags = cpu_to_le16(0x1);
 854         chan->dwell = cpu_to_le16(0x0);
 855
 856         for (i = 0; i < priv->iq_autocal_len; i++) {
 857                 if (priv->iq_autocal[i].freq != freq)
 858                         continue;
 859
 860                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
 861                        sizeof(*priv->iq_autocal));
 862                 break;
 863         }
 864         if (i == priv->iq_autocal_len)
 865                 goto err;
 866
 867         for (i = 0; i < priv->output_limit_len; i++) {
 868                 if (priv->output_limit[i].freq != freq)
 869                         continue;
 870
 871                 chan->val_barker = 0x38;
 872                 chan->val_bpsk = chan->dup_bpsk =
 873                         priv->output_limit[i].val_bpsk;
 874                 chan->val_qpsk = chan->dup_qpsk =
 875                         priv->output_limit[i].val_qpsk;
 876                 chan->val_16qam = chan->dup_16qam =
 877                         priv->output_limit[i].val_16qam;
 878                 chan->val_64qam = chan->dup_64qam =
 879                         priv->output_limit[i].val_64qam;
 880                 break;
 881         }
 882         if (i == priv->output_limit_len)
 883                 goto err;
 884
 885         entry = priv->curve_data->data;
 886         for (i = 0; i < priv->curve_data->channels; i++) {
 887                 if (*((__le16 *)entry) != freq) {
 888                         entry += sizeof(__le16);
 889                         entry += sizeof(struct p54_pa_curve_data_sample) *
 890                                  priv->curve_data->points_per_channel;
 891                         continue;
 892                 }
 893
 894                 entry += sizeof(__le16);
 895                 chan->pa_points_per_curve =
 896                         min(priv->curve_data->points_per_channel, (u8) 8);
 897
 898                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
 899                        chan->pa_points_per_curve);
 900                 break;
 901         }
 902
 903         if (priv->fw_var < 0x500) {
 904                 data_len = P54_TX_CONTROL_CHANNEL_V1_LEN;
 905                 chan->v1.rssical_mul = cpu_to_le16(130);
 906                 chan->v1.rssical_add = cpu_to_le16(0xfe70);
 907         } else {
 908                 data_len = P54_TX_CONTROL_CHANNEL_V2_LEN;
 909                 chan->v2.rssical_mul = cpu_to_le16(130);
 910                 chan->v2.rssical_add = cpu_to_le16(0xfe70);
 911                 chan->v2.basic_rate_mask = cpu_to_le32(0x15f);
 912         }
 913
 914         hdr->len = cpu_to_le16(data_len);
 915         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + data_len);
 916         priv->tx(dev, hdr, sizeof(*hdr) + data_len, 1);
 917         return 0;
 918
 919  err:
 920         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
 921         kfree(hdr);
 922         return -EINVAL;
 923 }
 924
 925 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
 926 {
 927         struct p54_common *priv = dev->priv;
 928         struct p54_control_hdr *hdr;
 929         struct p54_tx_control_led *led;
 930
 931         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
 932                       priv->tx_hdr_len, GFP_KERNEL);
 933         if (!hdr)
 934                 return -ENOMEM;
 935
 936         hdr = (void *)hdr + priv->tx_hdr_len;
 937         hdr->magic1 = cpu_to_le16(0x8001);
 938         hdr->len = cpu_to_le16(sizeof(*led));
 939         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
 940         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led));
 941
 942         led = (struct p54_tx_control_led *) hdr->data;
 943         led->mode = cpu_to_le16(mode);
 944         led->led_permanent = cpu_to_le16(link);
 945         led->led_temporary = cpu_to_le16(act);
 946         led->duration = cpu_to_le16(1000);
 947
 948         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
 949
 950         return 0;
 951 }
 952
 953 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
 954 do {                                                            \
 955         queue.aifs = cpu_to_le16(ai_fs);                        \
 956         queue.cwmin = cpu_to_le16(cw_min);                      \
 957         queue.cwmax = cpu_to_le16(cw_max);                      \
 958         queue.txop = cpu_to_le16(_txop);                        \
 959 } while(0)
 960
 961 static void p54_init_vdcf(struct ieee80211_hw *dev)
 962 {
 963         struct p54_common *priv = dev->priv;
 964         struct p54_control_hdr *hdr;
 965         struct p54_tx_control_vdcf *vdcf;
 966
 967         /* all USB V1 adapters need a extra headroom */
 968         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 969         hdr->magic1 = cpu_to_le16(0x8001);
 970         hdr->len = cpu_to_le16(sizeof(*vdcf));
 971         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
 972         hdr->req_id = cpu_to_le32(priv->rx_start);
 973
 974         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 975
 976         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 47);
 977         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 94);
 978         P54_SET_QUEUE(vdcf->queue[2], 0x0003, 0x000f, 0x03ff, 0);
 979         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0);
 980 }
 981
 982 static void p54_set_vdcf(struct ieee80211_hw *dev)
 983 {
 984         struct p54_common *priv = dev->priv;
 985         struct p54_control_hdr *hdr;
 986         struct p54_tx_control_vdcf *vdcf;
 987
 988         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 989
 990         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf));
 991
 992         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 993
 994         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
 995                 vdcf->slottime = 9;
 996                 vdcf->magic1 = 0x10;
 997                 vdcf->magic2 = 0x00;
 998         } else {
 999                 vdcf->slottime = 20;
1000                 vdcf->magic1 = 0x0a;
1001                 vdcf->magic2 = 0x06;
1002         }
1003
1004         /* (see prism54/isl_oid.h for further details) */
1005         vdcf->frameburst = cpu_to_le16(0);
1006
1007         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
1008 }
1009
1010 static int p54_start(struct ieee80211_hw *dev)
1011 {
1012         struct p54_common *priv = dev->priv;
1013         int err;
1014
1015         if (!priv->cached_vdcf) {
1016                 priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf)+
1017                         priv->tx_hdr_len + sizeof(struct p54_control_hdr),
1018                         GFP_KERNEL);
1019
1020                 if (!priv->cached_vdcf)
1021                         return -ENOMEM;
1022         }
1023
1024         err = priv->open(dev);
1025         if (!err)
1026                 priv->mode = IEEE80211_IF_TYPE_MNTR;
1027
1028         p54_init_vdcf(dev);
1029
1030         return err;
1031 }
1032
1033 static void p54_stop(struct ieee80211_hw *dev)
1034 {
1035         struct p54_common *priv = dev->priv;
1036         struct sk_buff *skb;
1037         while ((skb = skb_dequeue(&priv->tx_queue)))
1038                 kfree_skb(skb);
1039         priv->stop(dev);
1040         priv->mode = IEEE80211_IF_TYPE_INVALID;
1041 }
1042
1043 static int p54_add_interface(struct ieee80211_hw *dev,
1044                              struct ieee80211_if_init_conf *conf)
1045 {
1046         struct p54_common *priv = dev->priv;
1047
1048         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
1049                 return -EOPNOTSUPP;
1050
1051         switch (conf->type) {
1052         case IEEE80211_IF_TYPE_STA:
1053                 priv->mode = conf->type;
1054                 break;
1055         default:
1056                 return -EOPNOTSUPP;
1057         }
1058
1059         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1060
1061         p54_set_filter(dev, 0, NULL);
1062
1063         switch (conf->type) {
1064         case IEEE80211_IF_TYPE_STA:
1065                 p54_set_filter(dev, 1, NULL);
1066                 break;
1067         default:
1068                 BUG();  /* impossible */
1069                 break;
1070         }
1071
1072         p54_set_leds(dev, 1, 0, 0);
1073
1074         return 0;
1075 }
1076
1077 static void p54_remove_interface(struct ieee80211_hw *dev,
1078                                  struct ieee80211_if_init_conf *conf)
1079 {
1080         struct p54_common *priv = dev->priv;
1081         priv->mode = IEEE80211_IF_TYPE_MNTR;
1082         memset(priv->mac_addr, 0, ETH_ALEN);
1083         p54_set_filter(dev, 0, NULL);
1084 }
1085
1086 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
1087 {
1088         int ret;
1089         struct p54_common *priv = dev->priv;
1090
1091         mutex_lock(&priv->conf_mutex);
1092         priv->rx_antenna = (conf->antenna_sel_rx == 0) ?
1093                 2 : conf->antenna_sel_tx - 1;
1094         ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
1095         p54_set_vdcf(dev);
1096         mutex_unlock(&priv->conf_mutex);
1097         return ret;
1098 }
1099
1100 static int p54_config_interface(struct ieee80211_hw *dev,
1101                                 struct ieee80211_vif *vif,
1102                                 struct ieee80211_if_conf *conf)
1103 {
1104         struct p54_common *priv = dev->priv;
1105
1106         mutex_lock(&priv->conf_mutex);
1107         p54_set_filter(dev, 0, conf->bssid);
1108         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
1109         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1110         mutex_unlock(&priv->conf_mutex);
1111         return 0;
1112 }
1113
1114 static void p54_configure_filter(struct ieee80211_hw *dev,
1115                                  unsigned int changed_flags,
1116                                  unsigned int *total_flags,
1117                                  int mc_count, struct dev_mc_list *mclist)
1118 {
1119         struct p54_common *priv = dev->priv;
1120
1121         *total_flags &= FIF_BCN_PRBRESP_PROMISC;
1122
1123         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1124                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1125                         p54_set_filter(dev, 0, NULL);
1126                 else
1127                         p54_set_filter(dev, 0, priv->bssid);
1128         }
1129 }
1130
1131 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1132                        const struct ieee80211_tx_queue_params *params)
1133 {
1134         struct p54_common *priv = dev->priv;
1135         struct p54_tx_control_vdcf *vdcf;
1136
1137         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
1138                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
1139
1140         if ((params) && !(queue > 4)) {
1141                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
1142                         params->cw_min, params->cw_max, params->txop);
1143         } else
1144                 return -EINVAL;
1145
1146         p54_set_vdcf(dev);
1147
1148         return 0;
1149 }
1150
1151 static int p54_get_stats(struct ieee80211_hw *dev,
1152                          struct ieee80211_low_level_stats *stats)
1153 {
1154         /* TODO */
1155         return 0;
1156 }
1157
1158 static int p54_get_tx_stats(struct ieee80211_hw *dev,
1159                             struct ieee80211_tx_queue_stats *stats)
1160 {
1161         struct p54_common *priv = dev->priv;
1162
1163         memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
1164
1165         return 0;
1166 }
1167
1168 static const struct ieee80211_ops p54_ops = {
1169         .tx                     = p54_tx,
1170         .start                  = p54_start,
1171         .stop                   = p54_stop,
1172         .add_interface          = p54_add_interface,
1173         .remove_interface       = p54_remove_interface,
1174         .config                 = p54_config,
1175         .config_interface       = p54_config_interface,
1176         .configure_filter       = p54_configure_filter,
1177         .conf_tx                = p54_conf_tx,
1178         .get_stats              = p54_get_stats,
1179         .get_tx_stats           = p54_get_tx_stats
1180 };
1181
1182 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
1183 {
1184         struct ieee80211_hw *dev;
1185         struct p54_common *priv;
1186
1187         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1188         if (!dev)
1189                 return NULL;
1190
1191         priv = dev->priv;
1192         priv->mode = IEEE80211_IF_TYPE_INVALID;
1193         skb_queue_head_init(&priv->tx_queue);
1194         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
1195                      IEEE80211_HW_RX_INCLUDES_FCS |
1196                      IEEE80211_HW_SIGNAL_UNSPEC;
1197
1198         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1199
1200         dev->channel_change_time = 1000;        /* TODO: find actual value */
1201         dev->max_signal = 127;
1202
1203         priv->tx_stats[0].limit = 1;
1204         priv->tx_stats[1].limit = 1;
1205         priv->tx_stats[2].limit = 1;
1206         priv->tx_stats[3].limit = 1;
1207         priv->tx_stats[4].limit = 5;
1208         dev->queues = 1;
1209         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
1210                                  sizeof(struct p54_tx_control_allocdata);
1211
1212         mutex_init(&priv->conf_mutex);
1213         init_completion(&priv->eeprom_comp);
1214
1215         return dev;
1216 }
1217 EXPORT_SYMBOL_GPL(p54_init_common);
1218
1219 void p54_free_common(struct ieee80211_hw *dev)
1220 {
1221         struct p54_common *priv = dev->priv;
1222         kfree(priv->iq_autocal);
1223         kfree(priv->output_limit);
1224         kfree(priv->curve_data);
1225         kfree(priv->cached_vdcf);
1226 }
1227 EXPORT_SYMBOL_GPL(p54_free_common);
1228
1229 static int __init p54_init(void)
1230 {
1231         return 0;
1232 }
1233
1234 static void __exit p54_exit(void)
1235 {
1236 }
1237
1238 module_init(p54_init);
1239 module_exit(p54_exit);