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

   1 /*
   2  * Common code for mac80211 Prism54 drivers
   3  *
   4  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   5  * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
   6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * Based on:
   9  * - the islsm (softmac prism54) driver, which is:
  10  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  11  * - stlc45xx driver
  12  * C\ 2  Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/firmware.h>
  21 #include <linux/etherdevice.h>
  22
  23 #include <net/mac80211.h>
  24
  25 #include "p54.h"
  26 #include "p54common.h"
  27
  28 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  29 MODULE_DESCRIPTION("Softmac Prism54 common code");
  30 MODULE_LICENSE("GPL");
  31 MODULE_ALIAS("prism54common");
  32
  33 static struct ieee80211_rate p54_bgrates[] = {
  34         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  35         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  36         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  37         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  38         { .bitrate = 60, .hw_value = 4, },
  39         { .bitrate = 90, .hw_value = 5, },
  40         { .bitrate = 120, .hw_value = 6, },
  41         { .bitrate = 180, .hw_value = 7, },
  42         { .bitrate = 240, .hw_value = 8, },
  43         { .bitrate = 360, .hw_value = 9, },
  44         { .bitrate = 480, .hw_value = 10, },
  45         { .bitrate = 540, .hw_value = 11, },
  46 };
  47
  48 static struct ieee80211_channel p54_bgchannels[] = {
  49         { .center_freq = 2412, .hw_value = 1, },
  50         { .center_freq = 2417, .hw_value = 2, },
  51         { .center_freq = 2422, .hw_value = 3, },
  52         { .center_freq = 2427, .hw_value = 4, },
  53         { .center_freq = 2432, .hw_value = 5, },
  54         { .center_freq = 2437, .hw_value = 6, },
  55         { .center_freq = 2442, .hw_value = 7, },
  56         { .center_freq = 2447, .hw_value = 8, },
  57         { .center_freq = 2452, .hw_value = 9, },
  58         { .center_freq = 2457, .hw_value = 10, },
  59         { .center_freq = 2462, .hw_value = 11, },
  60         { .center_freq = 2467, .hw_value = 12, },
  61         { .center_freq = 2472, .hw_value = 13, },
  62         { .center_freq = 2484, .hw_value = 14, },
  63 };
  64
  65 static struct ieee80211_supported_band band_2GHz = {
  66         .channels = p54_bgchannels,
  67         .n_channels = ARRAY_SIZE(p54_bgchannels),
  68         .bitrates = p54_bgrates,
  69         .n_bitrates = ARRAY_SIZE(p54_bgrates),
  70 };
  71
  72 static struct ieee80211_rate p54_arates[] = {
  73         { .bitrate = 60, .hw_value = 4, },
  74         { .bitrate = 90, .hw_value = 5, },
  75         { .bitrate = 120, .hw_value = 6, },
  76         { .bitrate = 180, .hw_value = 7, },
  77         { .bitrate = 240, .hw_value = 8, },
  78         { .bitrate = 360, .hw_value = 9, },
  79         { .bitrate = 480, .hw_value = 10, },
  80         { .bitrate = 540, .hw_value = 11, },
  81 };
  82
  83 static struct ieee80211_channel p54_achannels[] = {
  84         { .center_freq = 4920 },
  85         { .center_freq = 4940 },
  86         { .center_freq = 4960 },
  87         { .center_freq = 4980 },
  88         { .center_freq = 5040 },
  89         { .center_freq = 5060 },
  90         { .center_freq = 5080 },
  91         { .center_freq = 5170 },
  92         { .center_freq = 5180 },
  93         { .center_freq = 5190 },
  94         { .center_freq = 5200 },
  95         { .center_freq = 5210 },
  96         { .center_freq = 5220 },
  97         { .center_freq = 5230 },
  98         { .center_freq = 5240 },
  99         { .center_freq = 5260 },
 100         { .center_freq = 5280 },
 101         { .center_freq = 5300 },
 102         { .center_freq = 5320 },
 103         { .center_freq = 5500 },
 104         { .center_freq = 5520 },
 105         { .center_freq = 5540 },
 106         { .center_freq = 5560 },
 107         { .center_freq = 5580 },
 108         { .center_freq = 5600 },
 109         { .center_freq = 5620 },
 110         { .center_freq = 5640 },
 111         { .center_freq = 5660 },
 112         { .center_freq = 5680 },
 113         { .center_freq = 5700 },
 114         { .center_freq = 5745 },
 115         { .center_freq = 5765 },
 116         { .center_freq = 5785 },
 117         { .center_freq = 5805 },
 118         { .center_freq = 5825 },
 119 };
 120
 121 static struct ieee80211_supported_band band_5GHz = {
 122         .channels = p54_achannels,
 123         .n_channels = ARRAY_SIZE(p54_achannels),
 124         .bitrates = p54_arates,
 125         .n_bitrates = ARRAY_SIZE(p54_arates),
 126 };
 127
 128 int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
 129 {
 130         struct p54_common *priv = dev->priv;
 131         struct bootrec_exp_if *exp_if;
 132         struct bootrec *bootrec;
 133         u32 *data = (u32 *)fw->data;
 134         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
 135         u8 *fw_version = NULL;
 136         size_t len;
 137         int i;
 138
 139         if (priv->rx_start)
 140                 return 0;
 141
 142         while (data < end_data && *data)
 143                 data++;
 144
 145         while (data < end_data && !*data)
 146                 data++;
 147
 148         bootrec = (struct bootrec *) data;
 149
 150         while (bootrec->data <= end_data &&
 151                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
 152                 u32 code = le32_to_cpu(bootrec->code);
 153                 switch (code) {
 154                 case BR_CODE_COMPONENT_ID:
 155                         priv->fw_interface = be32_to_cpup((__be32 *)
 156                                              bootrec->data);
 157                         switch (priv->fw_interface) {
 158                         case FW_FMAC:
 159                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
 160                                 break;
 161                         case FW_LM20:
 162                                 printk(KERN_INFO "p54: LM20 firmware\n");
 163                                 break;
 164                         case FW_LM86:
 165                                 printk(KERN_INFO "p54: LM86 firmware\n");
 166                                 break;
 167                         case FW_LM87:
 168                                 printk(KERN_INFO "p54: LM87 firmware\n");
 169                                 break;
 170                         default:
 171                                 printk(KERN_INFO "p54: unknown firmware\n");
 172                                 break;
 173                         }
 174                         break;
 175                 case BR_CODE_COMPONENT_VERSION:
 176                         /* 24 bytes should be enough for all firmwares */
 177                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
 178                                 fw_version = (unsigned char*)bootrec->data;
 179                         break;
 180                 case BR_CODE_DESCR: {
 181                         struct bootrec_desc *desc =
 182                                 (struct bootrec_desc *)bootrec->data;
 183                         priv->rx_start = le32_to_cpu(desc->rx_start);
 184                         /* FIXME add sanity checking */
 185                         priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
 186                         priv->headroom = desc->headroom;
 187                         priv->tailroom = desc->tailroom;
 188                         if (le32_to_cpu(bootrec->len) == 11)
 189                                 priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
 190                         else
 191                                 priv->rx_mtu = (size_t)
 192                                         0x620 - priv->tx_hdr_len;
 193                         break;
 194                         }
 195                 case BR_CODE_EXPOSED_IF:
 196                         exp_if = (struct bootrec_exp_if *) bootrec->data;
 197                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
 198                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
 199                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
 200                         break;
 201                 case BR_CODE_DEPENDENT_IF:
 202                         break;
 203                 case BR_CODE_END_OF_BRA:
 204                 case LEGACY_BR_CODE_END_OF_BRA:
 205                         end_data = NULL;
 206                         break;
 207                 default:
 208                         break;
 209                 }
 210                 bootrec = (struct bootrec *)&bootrec->data[len];
 211         }
 212
 213         if (fw_version)
 214                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
 215                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
 216
 217         if (priv->fw_var < 0x500)
 218                 printk(KERN_INFO "p54: you are using an obsolete firmware. "
 219                        "visit http://wireless.kernel.org/en/users/Drivers/p54 "
 220                        "and grab one for \"kernel >= 2.6.28\"!\n");
 221
 222         if (priv->fw_var >= 0x300) {
 223                 /* Firmware supports QoS, use it! */
 224                 priv->tx_stats[4].limit = 3;            /* AC_VO */
 225                 priv->tx_stats[5].limit = 4;            /* AC_VI */
 226                 priv->tx_stats[6].limit = 3;            /* AC_BE */
 227                 priv->tx_stats[7].limit = 2;            /* AC_BK */
 228                 dev->queues = 4;
 229         }
 230
 231         return 0;
 232 }
 233 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 234
 235 static int p54_convert_rev0(struct ieee80211_hw *dev,
 236                             struct pda_pa_curve_data *curve_data)
 237 {
 238         struct p54_common *priv = dev->priv;
 239         struct p54_pa_curve_data_sample *dst;
 240         struct pda_pa_curve_data_sample_rev0 *src;
 241         size_t cd_len = sizeof(*curve_data) +
 242                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 243                  curve_data->channels;
 244         unsigned int i, j;
 245         void *source, *target;
 246
 247         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 248         if (!priv->curve_data)
 249                 return -ENOMEM;
 250
 251         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 252         source = curve_data->data;
 253         target = priv->curve_data->data;
 254         for (i = 0; i < curve_data->channels; i++) {
 255                 __le16 *freq = source;
 256                 source += sizeof(__le16);
 257                 *((__le16 *)target) = *freq;
 258                 target += sizeof(__le16);
 259                 for (j = 0; j < curve_data->points_per_channel; j++) {
 260                         dst = target;
 261                         src = source;
 262
 263                         dst->rf_power = src->rf_power;
 264                         dst->pa_detector = src->pa_detector;
 265                         dst->data_64qam = src->pcv;
 266                         /* "invent" the points for the other modulations */
 267 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 268                         dst->data_16qam = SUB(src->pcv, 12);
 269                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 270                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 271                         dst->data_barker = SUB(dst->data_bpsk, 14);
 272 #undef SUB
 273                         target += sizeof(*dst);
 274                         source += sizeof(*src);
 275                 }
 276         }
 277
 278         return 0;
 279 }
 280
 281 static int p54_convert_rev1(struct ieee80211_hw *dev,
 282                             struct pda_pa_curve_data *curve_data)
 283 {
 284         struct p54_common *priv = dev->priv;
 285         struct p54_pa_curve_data_sample *dst;
 286         struct pda_pa_curve_data_sample_rev1 *src;
 287         size_t cd_len = sizeof(*curve_data) +
 288                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 289                  curve_data->channels;
 290         unsigned int i, j;
 291         void *source, *target;
 292
 293         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 294         if (!priv->curve_data)
 295                 return -ENOMEM;
 296
 297         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 298         source = curve_data->data;
 299         target = priv->curve_data->data;
 300         for (i = 0; i < curve_data->channels; i++) {
 301                 __le16 *freq = source;
 302                 source += sizeof(__le16);
 303                 *((__le16 *)target) = *freq;
 304                 target += sizeof(__le16);
 305                 for (j = 0; j < curve_data->points_per_channel; j++) {
 306                         memcpy(target, source, sizeof(*src));
 307
 308                         target += sizeof(*dst);
 309                         source += sizeof(*src);
 310                 }
 311                 source++;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
 318                               "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
 319 static int p54_init_xbow_synth(struct ieee80211_hw *dev);
 320
 321 static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 322 {
 323         struct p54_common *priv = dev->priv;
 324         struct eeprom_pda_wrap *wrap = NULL;
 325         struct pda_entry *entry;
 326         unsigned int data_len, entry_len;
 327         void *tmp;
 328         int err;
 329         u8 *end = (u8 *)eeprom + len;
 330         u16 synth = 0;
 331
 332         wrap = (struct eeprom_pda_wrap *) eeprom;
 333         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 334
 335         /* verify that at least the entry length/code fits */
 336         while ((u8 *)entry <= end - sizeof(*entry)) {
 337                 entry_len = le16_to_cpu(entry->len);
 338                 data_len = ((entry_len - 1) << 1);
 339
 340                 /* abort if entry exceeds whole structure */
 341                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 342                         break;
 343
 344                 switch (le16_to_cpu(entry->code)) {
 345                 case PDR_MAC_ADDRESS:
 346                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 347                         break;
 348                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 349                         if (data_len < 2) {
 350                                 err = -EINVAL;
 351                                 goto err;
 352                         }
 353
 354                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 355                                 err = -EINVAL;
 356                                 goto err;
 357                         }
 358
 359                         priv->output_limit = kmalloc(entry->data[1] *
 360                                 sizeof(*priv->output_limit), GFP_KERNEL);
 361
 362                         if (!priv->output_limit) {
 363                                 err = -ENOMEM;
 364                                 goto err;
 365                         }
 366
 367                         memcpy(priv->output_limit, &entry->data[2],
 368                                entry->data[1]*sizeof(*priv->output_limit));
 369                         priv->output_limit_len = entry->data[1];
 370                         break;
 371                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 372                         struct pda_pa_curve_data *curve_data =
 373                                 (struct pda_pa_curve_data *)entry->data;
 374                         if (data_len < sizeof(*curve_data)) {
 375                                 err = -EINVAL;
 376                                 goto err;
 377                         }
 378
 379                         switch (curve_data->cal_method_rev) {
 380                         case 0:
 381                                 err = p54_convert_rev0(dev, curve_data);
 382                                 break;
 383                         case 1:
 384                                 err = p54_convert_rev1(dev, curve_data);
 385                                 break;
 386                         default:
 387                                 printk(KERN_ERR "p54: unknown curve data "
 388                                                 "revision %d\n",
 389                                                 curve_data->cal_method_rev);
 390                                 err = -ENODEV;
 391                                 break;
 392                         }
 393                         if (err)
 394                                 goto err;
 395
 396                 }
 397                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 398                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 399                         if (!priv->iq_autocal) {
 400                                 err = -ENOMEM;
 401                                 goto err;
 402                         }
 403
 404                         memcpy(priv->iq_autocal, entry->data, data_len);
 405                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 406                         break;
 407                 case PDR_INTERFACE_LIST:
 408                         tmp = entry->data;
 409                         while ((u8 *)tmp < entry->data + data_len) {
 410                                 struct bootrec_exp_if *exp_if = tmp;
 411                                 if (le16_to_cpu(exp_if->if_id) == 0xf)
 412                                         synth = le16_to_cpu(exp_if->variant);
 413                                 tmp += sizeof(struct bootrec_exp_if);
 414                         }
 415                         break;
 416                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 417                         priv->version = *(u8 *)(entry->data + 1);
 418                         break;
 419                 case PDR_END:
 420                         /* make it overrun */
 421                         entry_len = len;
 422                         break;
 423                 default:
 424                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
 425                                 le16_to_cpu(entry->code));
 426                         break;
 427                 }
 428
 429                 entry = (void *)entry + (entry_len + 1)*2;
 430         }
 431
 432         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 433             !priv->curve_data) {
 434                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 435                 err = -EINVAL;
 436                 goto err;
 437         }
 438
 439         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 440         if (priv->rxhw == 4)
 441                 p54_init_xbow_synth(dev);
 442         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 443                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 444         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 445                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
 446
 447         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 448                 u8 perm_addr[ETH_ALEN];
 449
 450                 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
 451                         wiphy_name(dev->wiphy));
 452                 random_ether_addr(perm_addr);
 453                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 454         }
 455
 456         printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
 457                 wiphy_name(dev->wiphy),
 458                 dev->wiphy->perm_addr,
 459                 priv->version, p54_rf_chips[priv->rxhw]);
 460
 461         return 0;
 462
 463   err:
 464         if (priv->iq_autocal) {
 465                 kfree(priv->iq_autocal);
 466                 priv->iq_autocal = NULL;
 467         }
 468
 469         if (priv->output_limit) {
 470                 kfree(priv->output_limit);
 471                 priv->output_limit = NULL;
 472         }
 473
 474         if (priv->curve_data) {
 475                 kfree(priv->curve_data);
 476                 priv->curve_data = NULL;
 477         }
 478
 479         printk(KERN_ERR "p54: eeprom parse failed!\n");
 480         return err;
 481 }
 482
 483 static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
 484 {
 485         /* TODO: get the rssi_add & rssi_mul data from the eeprom */
 486         return ((rssi * 0x83) / 64 - 400) / 4;
 487 }
 488
 489 static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 490 {
 491         struct p54_common *priv = dev->priv;
 492         struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
 493         struct ieee80211_rx_status rx_status = {0};
 494         u16 freq = le16_to_cpu(hdr->freq);
 495         size_t header_len = sizeof(*hdr);
 496         u32 tsf32;
 497
 498         if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
 499                 if (priv->filter_flags & FIF_FCSFAIL)
 500                         rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 501                 else
 502                         return 0;
 503         }
 504
 505         rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
 506         rx_status.noise = priv->noise;
 507         /* XX correct? */
 508         rx_status.qual = (100 * hdr->rssi) / 127;
 509         rx_status.rate_idx = (dev->conf.channel->band == IEEE80211_BAND_2GHZ ?
 510                         hdr->rate : (hdr->rate - 4)) & 0xf;
 511         rx_status.freq = freq;
 512         rx_status.band =  dev->conf.channel->band;
 513         rx_status.antenna = hdr->antenna;
 514
 515         tsf32 = le32_to_cpu(hdr->tsf32);
 516         if (tsf32 < priv->tsf_low32)
 517                 priv->tsf_high32++;
 518         rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
 519         priv->tsf_low32 = tsf32;
 520
 521         rx_status.flag |= RX_FLAG_TSFT;
 522
 523         if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 524                 header_len += hdr->align[0];
 525
 526         skb_pull(skb, header_len);
 527         skb_trim(skb, le16_to_cpu(hdr->len));
 528
 529         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 530
 531         return -1;
 532 }
 533
 534 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 535 {
 536         struct p54_common *priv = dev->priv;
 537         int i;
 538
 539         if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
 540                 return ;
 541
 542         for (i = 0; i < dev->queues; i++)
 543                 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
 544                         ieee80211_wake_queue(dev, i);
 545 }
 546
 547 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
 548 {
 549         struct p54_common *priv = dev->priv;
 550         struct ieee80211_tx_info *info;
 551         struct memrecord *range;
 552         unsigned long flags;
 553         u32 freed = 0, last_addr = priv->rx_start;
 554
 555         if (!skb || !dev)
 556                 return;
 557
 558         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 559         info = IEEE80211_SKB_CB(skb);
 560         range = (void *)info->rate_driver_data;
 561         if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
 562                 struct ieee80211_tx_info *ni;
 563                 struct memrecord *mr;
 564
 565                 ni = IEEE80211_SKB_CB(skb->prev);
 566                 mr = (struct memrecord *)ni->rate_driver_data;
 567                 last_addr = mr->end_addr;
 568         }
 569         if (skb->next != (struct sk_buff *)&priv->tx_queue) {
 570                 struct ieee80211_tx_info *ni;
 571                 struct memrecord *mr;
 572
 573                 ni = IEEE80211_SKB_CB(skb->next);
 574                 mr = (struct memrecord *)ni->rate_driver_data;
 575                 freed = mr->start_addr - last_addr;
 576         } else
 577                 freed = priv->rx_end - last_addr;
 578         __skb_unlink(skb, &priv->tx_queue);
 579         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 580         kfree_skb(skb);
 581
 582         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 583                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 584                 p54_wake_free_queues(dev);
 585 }
 586 EXPORT_SYMBOL_GPL(p54_free_skb);
 587
 588 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 589 {
 590         struct p54_common *priv = dev->priv;
 591         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 592         struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
 593         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 594         u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
 595         struct memrecord *range = NULL;
 596         u32 freed = 0;
 597         u32 last_addr = priv->rx_start;
 598         unsigned long flags;
 599         int count, idx;
 600
 601         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 602         while (entry != (struct sk_buff *)&priv->tx_queue) {
 603                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 604                 struct p54_hdr *entry_hdr;
 605                 struct p54_tx_data *entry_data;
 606                 int pad = 0;
 607
 608                 range = (void *)info->rate_driver_data;
 609                 if (range->start_addr != addr) {
 610                         last_addr = range->end_addr;
 611                         entry = entry->next;
 612                         continue;
 613                 }
 614
 615                 if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 616                         struct ieee80211_tx_info *ni;
 617                         struct memrecord *mr;
 618
 619                         ni = IEEE80211_SKB_CB(entry->next);
 620                         mr = (struct memrecord *)ni->rate_driver_data;
 621                         freed = mr->start_addr - last_addr;
 622                 } else
 623                         freed = priv->rx_end - last_addr;
 624
 625                 last_addr = range->end_addr;
 626                 __skb_unlink(entry, &priv->tx_queue);
 627                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 628
 629                 /*
 630                  * Clear manually, ieee80211_tx_info_clear_status would
 631                  * clear the counts too and we need them.
 632                  */
 633                 memset(&info->status.ampdu_ack_len, 0,
 634                        sizeof(struct ieee80211_tx_info) -
 635                        offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
 636                 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
 637                                       status.ampdu_ack_len) != 23);
 638
 639                 entry_hdr = (struct p54_hdr *) entry->data;
 640                 entry_data = (struct p54_tx_data *) entry_hdr->data;
 641                 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
 642                         pad = entry_data->align[0];
 643
 644                 /* walk through the rates array and adjust the counts */
 645                 count = payload->tries;
 646                 for (idx = 0; idx < 4; idx++) {
 647                         if (count >= info->status.rates[idx].count) {
 648                                 count -= info->status.rates[idx].count;
 649                         } else if (count > 0) {
 650                                 info->status.rates[idx].count = count;
 651                                 count = 0;
 652                         } else {
 653                                 info->status.rates[idx].idx = -1;
 654                                 info->status.rates[idx].count = 0;
 655                         }
 656                 }
 657
 658                 priv->tx_stats[entry_data->hw_queue].len--;
 659                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
 660                      (!payload->status))
 661                         info->flags |= IEEE80211_TX_STAT_ACK;
 662                 if (payload->status & P54_TX_PSM_CANCELLED)
 663                         info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
 664                 info->status.ack_signal = p54_rssi_to_dbm(dev,
 665                                 (int)payload->ack_rssi);
 666                 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 667                 ieee80211_tx_status_irqsafe(dev, entry);
 668                 goto out;
 669         }
 670         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 671
 672 out:
 673         if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
 674                      IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 675                 p54_wake_free_queues(dev);
 676 }
 677
 678 static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
 679                                    struct sk_buff *skb)
 680 {
 681         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 682         struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
 683         struct p54_common *priv = dev->priv;
 684
 685         if (!priv->eeprom)
 686                 return ;
 687
 688         memcpy(priv->eeprom, eeprom->data, le16_to_cpu(eeprom->len));
 689
 690         complete(&priv->eeprom_comp);
 691 }
 692
 693 static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
 694 {
 695         struct p54_common *priv = dev->priv;
 696         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 697         struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
 698         u32 tsf32 = le32_to_cpu(stats->tsf32);
 699
 700         if (tsf32 < priv->tsf_low32)
 701                 priv->tsf_high32++;
 702         priv->tsf_low32 = tsf32;
 703
 704         priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
 705         priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
 706         priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
 707
 708         priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
 709         complete(&priv->stats_comp);
 710
 711         mod_timer(&priv->stats_timer, jiffies + 5 * HZ);
 712 }
 713
 714 static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 715 {
 716         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 717
 718         switch (le16_to_cpu(hdr->type)) {
 719         case P54_CONTROL_TYPE_TXDONE:
 720                 p54_rx_frame_sent(dev, skb);
 721                 break;
 722         case P54_CONTROL_TYPE_BBP:
 723                 break;
 724         case P54_CONTROL_TYPE_STAT_READBACK:
 725                 p54_rx_stats(dev, skb);
 726                 break;
 727         case P54_CONTROL_TYPE_EEPROM_READBACK:
 728                 p54_rx_eeprom_readback(dev, skb);
 729                 break;
 730         default:
 731                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 732                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 733                 break;
 734         }
 735
 736         return 0;
 737 }
 738
 739 /* returns zero if skb can be reused */
 740 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 741 {
 742         u16 type = le16_to_cpu(*((__le16 *)skb->data));
 743
 744         if (type & P54_HDR_FLAG_CONTROL)
 745                 return p54_rx_control(dev, skb);
 746         else
 747                 return p54_rx_data(dev, skb);
 748 }
 749 EXPORT_SYMBOL_GPL(p54_rx);
 750
 751 /*
 752  * So, the firmware is somewhat stupid and doesn't know what places in its
 753  * memory incoming data should go to. By poking around in the firmware, we
 754  * can find some unused memory to upload our packets to. However, data that we
 755  * want the card to TX needs to stay intact until the card has told us that
 756  * it is done with it. This function finds empty places we can upload to and
 757  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 758  * allocated areas.
 759  */
 760 static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 761                                struct p54_hdr *data, u32 len)
 762 {
 763         struct p54_common *priv = dev->priv;
 764         struct sk_buff *entry = priv->tx_queue.next;
 765         struct sk_buff *target_skb = NULL;
 766         struct ieee80211_tx_info *info;
 767         struct memrecord *range;
 768         u32 last_addr = priv->rx_start;
 769         u32 largest_hole = 0;
 770         u32 target_addr = priv->rx_start;
 771         unsigned long flags;
 772         unsigned int left;
 773         len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
 774
 775         if (!skb)
 776                 return -EINVAL;
 777
 778         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 779         left = skb_queue_len(&priv->tx_queue);
 780         while (left--) {
 781                 u32 hole_size;
 782                 info = IEEE80211_SKB_CB(entry);
 783                 range = (void *)info->rate_driver_data;
 784                 hole_size = range->start_addr - last_addr;
 785                 if (!target_skb && hole_size >= len) {
 786                         target_skb = entry->prev;
 787                         hole_size -= len;
 788                         target_addr = last_addr;
 789                 }
 790                 largest_hole = max(largest_hole, hole_size);
 791                 last_addr = range->end_addr;
 792                 entry = entry->next;
 793         }
 794         if (!target_skb && priv->rx_end - last_addr >= len) {
 795                 target_skb = priv->tx_queue.prev;
 796                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 797                 if (!skb_queue_empty(&priv->tx_queue)) {
 798                         info = IEEE80211_SKB_CB(target_skb);
 799                         range = (void *)info->rate_driver_data;
 800                         target_addr = range->end_addr;
 801                 }
 802         } else
 803                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 804
 805         if (!target_skb) {
 806                 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 807                 ieee80211_stop_queues(dev);
 808                 return -ENOMEM;
 809         }
 810
 811         info = IEEE80211_SKB_CB(skb);
 812         range = (void *)info->rate_driver_data;
 813         range->start_addr = target_addr;
 814         range->end_addr = target_addr + len;
 815         __skb_queue_after(&priv->tx_queue, target_skb, skb);
 816         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 817
 818         if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
 819                            48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
 820                 ieee80211_stop_queues(dev);
 821
 822         data->req_id = cpu_to_le32(target_addr + priv->headroom);
 823         return 0;
 824 }
 825
 826 static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
 827                 u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
 828 {
 829         struct p54_common *priv = dev->priv;
 830         struct p54_hdr *hdr;
 831         struct sk_buff *skb;
 832
 833         skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
 834         if (!skb)
 835                 return NULL;
 836         skb_reserve(skb, priv->tx_hdr_len);
 837
 838         hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
 839         hdr->flags = cpu_to_le16(hdr_flags);
 840         hdr->len = cpu_to_le16(len - sizeof(*hdr));
 841         hdr->type = cpu_to_le16(type);
 842         hdr->tries = hdr->rts_tries = 0;
 843
 844         if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
 845                 kfree_skb(skb);
 846                 return NULL;
 847         }
 848         return skb;
 849 }
 850
 851 int p54_read_eeprom(struct ieee80211_hw *dev)
 852 {
 853         struct p54_common *priv = dev->priv;
 854         struct p54_hdr *hdr = NULL;
 855         struct p54_eeprom_lm86 *eeprom_hdr;
 856         struct sk_buff *skb;
 857         size_t eeprom_size = 0x2020, offset = 0, blocksize;
 858         int ret = -ENOMEM;
 859         void *eeprom = NULL;
 860
 861         skb = p54_alloc_skb(dev, 0x8000, sizeof(*hdr) + sizeof(*eeprom_hdr) +
 862                             EEPROM_READBACK_LEN,
 863                             P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
 864         if (!skb)
 865                 goto free;
 866         priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
 867         if (!priv->eeprom)
 868                 goto free;
 869         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 870         if (!eeprom)
 871                 goto free;
 872
 873         eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
 874                      sizeof(*eeprom_hdr) + EEPROM_READBACK_LEN);
 875
 876         while (eeprom_size) {
 877                 blocksize = min(eeprom_size, (size_t)EEPROM_READBACK_LEN);
 878                 eeprom_hdr->offset = cpu_to_le16(offset);
 879                 eeprom_hdr->len = cpu_to_le16(blocksize);
 880                 priv->tx(dev, skb, 0);
 881
 882                 if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
 883                         printk(KERN_ERR "%s: device does not respond!\n",
 884                                 wiphy_name(dev->wiphy));
 885                         ret = -EBUSY;
 886                         goto free;
 887                 }
 888
 889                 memcpy(eeprom + offset, priv->eeprom, blocksize);
 890                 offset += blocksize;
 891                 eeprom_size -= blocksize;
 892         }
 893
 894         ret = p54_parse_eeprom(dev, eeprom, offset);
 895 free:
 896         kfree(priv->eeprom);
 897         priv->eeprom = NULL;
 898         p54_free_skb(dev, skb);
 899         kfree(eeprom);
 900
 901         return ret;
 902 }
 903 EXPORT_SYMBOL_GPL(p54_read_eeprom);
 904
 905 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 906 {
 907         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 908         struct ieee80211_tx_queue_stats *current_queue = NULL;
 909         struct p54_common *priv = dev->priv;
 910         struct p54_hdr *hdr;
 911         struct p54_tx_data *txhdr;
 912         size_t padding, len;
 913         int i, j, ridx;
 914         u16 hdr_flags = 0;
 915         u8 rate;
 916         u8 cts_rate = 0x20;
 917         u8 rc_flags;
 918         u8 calculated_tries[4];
 919         u8 nrates = 0, nremaining = 8;
 920
 921         current_queue = &priv->tx_stats[skb_get_queue_mapping(skb) + 4];
 922         if (unlikely(current_queue->len > current_queue->limit))
 923                 return NETDEV_TX_BUSY;
 924         current_queue->len++;
 925         current_queue->count++;
 926         if (current_queue->len == current_queue->limit)
 927                 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
 928
 929         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 930         len = skb->len;
 931
 932         txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
 933         hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
 934
 935         if (padding)
 936                 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
 937         hdr->len = cpu_to_le16(len);
 938         hdr->type = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 0 : cpu_to_le16(1);
 939         hdr->rts_tries = info->control.rates[0].count;
 940
 941         /*
 942          * we register the rates in perfect order, and
 943          * RTS/CTS won't happen on 5 GHz
 944          */
 945         cts_rate = info->control.rts_cts_rate_idx;
 946
 947         memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
 948
 949         /* see how many rates got used */
 950         for (i = 0; i < 4; i++) {
 951                 if (info->control.rates[i].idx < 0)
 952                         break;
 953                 nrates++;
 954         }
 955
 956         /* limit tries to 8/nrates per rate */
 957         for (i = 0; i < nrates; i++) {
 958                 /*
 959                  * The magic expression here is equivalent to 8/nrates for
 960                  * all values that matter, but avoids division and jumps.
 961                  * Note that nrates can only take the values 1 through 4.
 962                  */
 963                 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
 964                                                  info->control.rates[i].count);
 965                 nremaining -= calculated_tries[i];
 966         }
 967
 968         /* if there are tries left, distribute from back to front */
 969         for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
 970                 int tmp = info->control.rates[i].count - calculated_tries[i];
 971
 972                 if (tmp <= 0)
 973                         continue;
 974                 /* RC requested more tries at this rate */
 975
 976                 tmp = min_t(int, tmp, nremaining);
 977                 calculated_tries[i] += tmp;
 978                 nremaining -= tmp;
 979         }
 980
 981         ridx = 0;
 982         for (i = 0; i < nrates && ridx < 8; i++) {
 983                 /* we register the rates in perfect order */
 984                 rate = info->control.rates[i].idx;
 985                 if (info->band == IEEE80211_BAND_5GHZ)
 986                         rate += 4;
 987
 988                 /* store the count we actually calculated for TX status */
 989                 info->control.rates[i].count = calculated_tries[i];
 990
 991                 rc_flags = info->control.rates[i].flags;
 992                 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
 993                         rate |= 0x10;
 994                         cts_rate |= 0x10;
 995                 }
 996                 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
 997                         rate |= 0x40;
 998                 else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
 999                         rate |= 0x20;
1000                 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
1001                         txhdr->rateset[ridx] = rate;
1002                         ridx++;
1003                 }
1004         }
1005
1006         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
1007                 hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
1008
1009         /* TODO: enable bursting */
1010         hdr->flags = cpu_to_le16(hdr_flags);
1011         hdr->tries = ridx;
1012         txhdr->crypt_offset = 0;
1013         txhdr->rts_rate_idx = 0;
1014         txhdr->key_type = 0;
1015         txhdr->key_len = 0;
1016         txhdr->hw_queue = skb_get_queue_mapping(skb) + 4;
1017         txhdr->backlog = 32;
1018         memset(txhdr->durations, 0, sizeof(txhdr->durations));
1019         txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
1020                 2 : info->antenna_sel_tx - 1;
1021         txhdr->output_power = priv->output_power;
1022         txhdr->cts_rate = cts_rate;
1023         if (padding)
1024                 txhdr->align[0] = padding;
1025
1026         /* modifies skb->cb and with it info, so must be last! */
1027         if (unlikely(p54_assign_address(dev, skb, hdr, skb->len))) {
1028                 skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
1029                 if (current_queue) {
1030                         current_queue->len--;
1031                         current_queue->count--;
1032                 }
1033                 return NETDEV_TX_BUSY;
1034         }
1035         priv->tx(dev, skb, 0);
1036         return 0;
1037 }
1038
1039 static int p54_setup_mac(struct ieee80211_hw *dev, u16 mode, const u8 *bssid)
1040 {
1041         struct p54_common *priv = dev->priv;
1042         struct sk_buff *skb;
1043         struct p54_setup_mac *setup;
1044
1045         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
1046                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
1047                             GFP_ATOMIC);
1048         if (!skb)
1049                 return -ENOMEM;
1050
1051         setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
1052         priv->mac_mode = mode;
1053         setup->mac_mode = cpu_to_le16(mode);
1054         memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
1055         if (!bssid)
1056                 memset(setup->bssid, ~0, ETH_ALEN);
1057         else
1058                 memcpy(setup->bssid, bssid, ETH_ALEN);
1059         setup->rx_antenna = priv->rx_antenna;
1060         if (priv->fw_var < 0x500) {
1061                 setup->v1.basic_rate_mask = cpu_to_le32(0x15f);
1062                 setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
1063                 setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
1064                 setup->v1.rxhw = cpu_to_le16(priv->rxhw);
1065                 setup->v1.wakeup_timer = cpu_to_le16(500);
1066                 setup->v1.unalloc0 = cpu_to_le16(0);
1067         } else {
1068                 setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
1069                 setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
1070                 setup->v2.rxhw = cpu_to_le16(priv->rxhw);
1071                 setup->v2.timer = cpu_to_le16(1000);
1072                 setup->v2.truncate = cpu_to_le16(48896);
1073                 setup->v2.basic_rate_mask = cpu_to_le32(0x15f);
1074                 setup->v2.sbss_offset = 0;
1075                 setup->v2.mcast_window = 0;
1076                 setup->v2.rx_rssi_threshold = 0;
1077                 setup->v2.rx_ed_threshold = 0;
1078                 setup->v2.ref_clock = cpu_to_le32(644245094);
1079                 setup->v2.lpf_bandwidth = cpu_to_le16(65535);
1080                 setup->v2.osc_start_delay = cpu_to_le16(65535);
1081         }
1082         priv->tx(dev, skb, 1);
1083         return 0;
1084 }
1085
1086 static int p54_set_freq(struct ieee80211_hw *dev, u16 frequency)
1087 {
1088         struct p54_common *priv = dev->priv;
1089         struct sk_buff *skb;
1090         struct p54_scan *chan;
1091         unsigned int i;
1092         void *entry;
1093         __le16 freq = cpu_to_le16(frequency);
1094
1095         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
1096                             sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
1097                             GFP_ATOMIC);
1098         if (!skb)
1099                 return -ENOMEM;
1100
1101         chan = (struct p54_scan *) skb_put(skb, sizeof(*chan));
1102         memset(chan->padding1, 0, sizeof(chan->padding1));
1103         chan->mode = cpu_to_le16(P54_SCAN_EXIT);
1104         chan->dwell = cpu_to_le16(0x0);
1105
1106         for (i = 0; i < priv->iq_autocal_len; i++) {
1107                 if (priv->iq_autocal[i].freq != freq)
1108                         continue;
1109
1110                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
1111                        sizeof(*priv->iq_autocal));
1112                 break;
1113         }
1114         if (i == priv->iq_autocal_len)
1115                 goto err;
1116
1117         for (i = 0; i < priv->output_limit_len; i++) {
1118                 if (priv->output_limit[i].freq != freq)
1119                         continue;
1120
1121                 chan->val_barker = 0x38;
1122                 chan->val_bpsk = chan->dup_bpsk =
1123                         priv->output_limit[i].val_bpsk;
1124                 chan->val_qpsk = chan->dup_qpsk =
1125                         priv->output_limit[i].val_qpsk;
1126                 chan->val_16qam = chan->dup_16qam =
1127                         priv->output_limit[i].val_16qam;
1128                 chan->val_64qam = chan->dup_64qam =
1129                         priv->output_limit[i].val_64qam;
1130                 break;
1131         }
1132         if (i == priv->output_limit_len)
1133                 goto err;
1134
1135         entry = priv->curve_data->data;
1136         for (i = 0; i < priv->curve_data->channels; i++) {
1137                 if (*((__le16 *)entry) != freq) {
1138                         entry += sizeof(__le16);
1139                         entry += sizeof(struct p54_pa_curve_data_sample) *
1140                                  priv->curve_data->points_per_channel;
1141                         continue;
1142                 }
1143
1144                 entry += sizeof(__le16);
1145                 chan->pa_points_per_curve =
1146                         min(priv->curve_data->points_per_channel, (u8) 8);
1147
1148                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
1149                        chan->pa_points_per_curve);
1150                 break;
1151         }
1152
1153         if (priv->fw_var < 0x500) {
1154                 chan->v1.rssical_mul = cpu_to_le16(130);
1155                 chan->v1.rssical_add = cpu_to_le16(0xfe70);
1156         } else {
1157                 chan->v2.rssical_mul = cpu_to_le16(130);
1158                 chan->v2.rssical_add = cpu_to_le16(0xfe70);
1159                 chan->v2.basic_rate_mask = cpu_to_le32(0x15f);
1160                 memset(chan->v2.rts_rates, 0, 8);
1161         }
1162         priv->tx(dev, skb, 1);
1163         return 0;
1164
1165  err:
1166         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
1167         kfree_skb(skb);
1168         return -EINVAL;
1169 }
1170
1171 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
1172 {
1173         struct p54_common *priv = dev->priv;
1174         struct sk_buff *skb;
1175         struct p54_led *led;
1176
1177         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
1178                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
1179                         GFP_ATOMIC);
1180         if (!skb)
1181                 return -ENOMEM;
1182
1183         led = (struct p54_led *)skb_put(skb, sizeof(*led));
1184         led->mode = cpu_to_le16(mode);
1185         led->led_permanent = cpu_to_le16(link);
1186         led->led_temporary = cpu_to_le16(act);
1187         led->duration = cpu_to_le16(1000);
1188         priv->tx(dev, skb, 1);
1189         return 0;
1190 }
1191
1192 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
1193 do {                                                            \
1194         queue.aifs = cpu_to_le16(ai_fs);                        \
1195         queue.cwmin = cpu_to_le16(cw_min);                      \
1196         queue.cwmax = cpu_to_le16(cw_max);                      \
1197         queue.txop = cpu_to_le16(_txop);                        \
1198 } while(0)
1199
1200 static int p54_set_edcf(struct ieee80211_hw *dev)
1201 {
1202         struct p54_common *priv = dev->priv;
1203         struct sk_buff *skb;
1204         struct p54_edcf *edcf;
1205
1206         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
1207                         sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
1208                         GFP_ATOMIC);
1209         if (!skb)
1210                 return -ENOMEM;
1211
1212         edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
1213         if (priv->use_short_slot) {
1214                 edcf->slottime = 9;
1215                 edcf->sifs = 0x10;
1216                 edcf->eofpad = 0x00;
1217         } else {
1218                 edcf->slottime = 20;
1219                 edcf->sifs = 0x0a;
1220                 edcf->eofpad = 0x06;
1221         }
1222         /* (see prism54/isl_oid.h for further details) */
1223         edcf->frameburst = cpu_to_le16(0);
1224         edcf->round_trip_delay = cpu_to_le16(0);
1225         memset(edcf->mapping, 0, sizeof(edcf->mapping));
1226         memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
1227         priv->tx(dev, skb, 1);
1228         return 0;
1229 }
1230
1231 static int p54_init_stats(struct ieee80211_hw *dev)
1232 {
1233         struct p54_common *priv = dev->priv;
1234
1235         priv->cached_stats = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL,
1236                         sizeof(struct p54_hdr) + sizeof(struct p54_statistics),
1237                         P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
1238         if (!priv->cached_stats)
1239                         return -ENOMEM;
1240
1241         mod_timer(&priv->stats_timer, jiffies + HZ);
1242         return 0;
1243 }
1244
1245 static int p54_start(struct ieee80211_hw *dev)
1246 {
1247         struct p54_common *priv = dev->priv;
1248         int err;
1249
1250         mutex_lock(&priv->conf_mutex);
1251         err = priv->open(dev);
1252         if (!err)
1253                 priv->mode = NL80211_IFTYPE_MONITOR;
1254         P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
1255         P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
1256         P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
1257         P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
1258         err = p54_set_edcf(dev);
1259         if (!err)
1260                 err = p54_init_stats(dev);
1261
1262         mutex_unlock(&priv->conf_mutex);
1263         return err;
1264 }
1265
1266 static void p54_stop(struct ieee80211_hw *dev)
1267 {
1268         struct p54_common *priv = dev->priv;
1269         struct sk_buff *skb;
1270
1271         mutex_lock(&priv->conf_mutex);
1272         del_timer(&priv->stats_timer);
1273         p54_free_skb(dev, priv->cached_stats);
1274         priv->cached_stats = NULL;
1275         while ((skb = skb_dequeue(&priv->tx_queue)))
1276                 kfree_skb(skb);
1277
1278         priv->stop(dev);
1279         priv->tsf_high32 = priv->tsf_low32 = 0;
1280         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1281         mutex_unlock(&priv->conf_mutex);
1282 }
1283
1284 static int p54_add_interface(struct ieee80211_hw *dev,
1285                              struct ieee80211_if_init_conf *conf)
1286 {
1287         struct p54_common *priv = dev->priv;
1288
1289         mutex_lock(&priv->conf_mutex);
1290         if (priv->mode != NL80211_IFTYPE_MONITOR) {
1291                 mutex_unlock(&priv->conf_mutex);
1292                 return -EOPNOTSUPP;
1293         }
1294
1295         switch (conf->type) {
1296         case NL80211_IFTYPE_STATION:
1297                 priv->mode = conf->type;
1298                 break;
1299         default:
1300                 mutex_unlock(&priv->conf_mutex);
1301                 return -EOPNOTSUPP;
1302         }
1303
1304         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1305
1306         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1307
1308         switch (conf->type) {
1309         case NL80211_IFTYPE_STATION:
1310                 p54_setup_mac(dev, P54_FILTER_TYPE_STATION, NULL);
1311                 break;
1312         default:
1313                 BUG();  /* impossible */
1314                 break;
1315         }
1316
1317         p54_set_leds(dev, 1, 0, 0);
1318
1319         mutex_unlock(&priv->conf_mutex);
1320         return 0;
1321 }
1322
1323 static void p54_remove_interface(struct ieee80211_hw *dev,
1324                                  struct ieee80211_if_init_conf *conf)
1325 {
1326         struct p54_common *priv = dev->priv;
1327
1328         mutex_lock(&priv->conf_mutex);
1329         p54_setup_mac(dev, P54_FILTER_TYPE_NONE, NULL);
1330         priv->mode = NL80211_IFTYPE_MONITOR;
1331         memset(priv->mac_addr, 0, ETH_ALEN);
1332         mutex_unlock(&priv->conf_mutex);
1333 }
1334
1335 static int p54_config(struct ieee80211_hw *dev, u32 changed)
1336 {
1337         int ret;
1338         struct p54_common *priv = dev->priv;
1339         struct ieee80211_conf *conf = &dev->conf;
1340
1341         mutex_lock(&priv->conf_mutex);
1342         priv->rx_antenna = 2; /* automatic */
1343         priv->output_power = conf->power_level << 2;
1344         ret = p54_set_freq(dev, conf->channel->center_freq);
1345         if (!ret)
1346                 ret = p54_set_edcf(dev);
1347         mutex_unlock(&priv->conf_mutex);
1348         return ret;
1349 }
1350
1351 static int p54_config_interface(struct ieee80211_hw *dev,
1352                                 struct ieee80211_vif *vif,
1353                                 struct ieee80211_if_conf *conf)
1354 {
1355         struct p54_common *priv = dev->priv;
1356
1357         mutex_lock(&priv->conf_mutex);
1358         p54_setup_mac(dev, P54_FILTER_TYPE_STATION, conf->bssid);
1359         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
1360         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1361         mutex_unlock(&priv->conf_mutex);
1362         return 0;
1363 }
1364
1365 static void p54_configure_filter(struct ieee80211_hw *dev,
1366                                  unsigned int changed_flags,
1367                                  unsigned int *total_flags,
1368                                  int mc_count, struct dev_mc_list *mclist)
1369 {
1370         struct p54_common *priv = dev->priv;
1371
1372         *total_flags &= FIF_BCN_PRBRESP_PROMISC |
1373                         FIF_PROMISC_IN_BSS |
1374                         FIF_FCSFAIL;
1375
1376         priv->filter_flags = *total_flags;
1377
1378         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1379                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1380                         p54_setup_mac(dev, priv->mac_mode, NULL);
1381                 else
1382                         p54_setup_mac(dev, priv->mac_mode, priv->bssid);
1383         }
1384
1385         if (changed_flags & FIF_PROMISC_IN_BSS) {
1386                 if (*total_flags & FIF_PROMISC_IN_BSS)
1387                         p54_setup_mac(dev, priv->mac_mode | 0x8, NULL);
1388                 else
1389                         p54_setup_mac(dev, priv->mac_mode & ~0x8, priv->bssid);
1390         }
1391 }
1392
1393 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1394                        const struct ieee80211_tx_queue_params *params)
1395 {
1396         struct p54_common *priv = dev->priv;
1397         int ret;
1398
1399         mutex_lock(&priv->conf_mutex);
1400         if ((params) && !(queue > 4)) {
1401                 P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
1402                         params->cw_min, params->cw_max, params->txop);
1403         } else
1404                 ret = -EINVAL;
1405         if (!ret)
1406                 ret = p54_set_edcf(dev);
1407         mutex_unlock(&priv->conf_mutex);
1408         return ret;
1409 }
1410
1411 static int p54_init_xbow_synth(struct ieee80211_hw *dev)
1412 {
1413         struct p54_common *priv = dev->priv;
1414         struct sk_buff *skb;
1415         struct p54_xbow_synth *xbow;
1416
1417         skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
1418                             sizeof(struct p54_hdr),
1419                             P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
1420                             GFP_KERNEL);
1421         if (!skb)
1422                 return -ENOMEM;
1423
1424         xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
1425         xbow->magic1 = cpu_to_le16(0x1);
1426         xbow->magic2 = cpu_to_le16(0x2);
1427         xbow->freq = cpu_to_le16(5390);
1428         memset(xbow->padding, 0, sizeof(xbow->padding));
1429         priv->tx(dev, skb, 1);
1430         return 0;
1431 }
1432
1433 static void p54_statistics_timer(unsigned long data)
1434 {
1435         struct ieee80211_hw *dev = (struct ieee80211_hw *) data;
1436         struct p54_common *priv = dev->priv;
1437
1438         BUG_ON(!priv->cached_stats);
1439
1440         priv->tx(dev, priv->cached_stats, 0);
1441 }
1442
1443 static int p54_get_stats(struct ieee80211_hw *dev,
1444                          struct ieee80211_low_level_stats *stats)
1445 {
1446         struct p54_common *priv = dev->priv;
1447
1448         del_timer(&priv->stats_timer);
1449         p54_statistics_timer((unsigned long)dev);
1450
1451         if (!wait_for_completion_interruptible_timeout(&priv->stats_comp, HZ)) {
1452                 printk(KERN_ERR "%s: device does not respond!\n",
1453                         wiphy_name(dev->wiphy));
1454                 return -EBUSY;
1455         }
1456
1457         memcpy(stats, &priv->stats, sizeof(*stats));
1458
1459         return 0;
1460 }
1461
1462 static int p54_get_tx_stats(struct ieee80211_hw *dev,
1463                             struct ieee80211_tx_queue_stats *stats)
1464 {
1465         struct p54_common *priv = dev->priv;
1466
1467         memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
1468
1469         return 0;
1470 }
1471
1472 static void p54_bss_info_changed(struct ieee80211_hw *dev,
1473                                  struct ieee80211_vif *vif,
1474                                  struct ieee80211_bss_conf *info,
1475                                  u32 changed)
1476 {
1477         struct p54_common *priv = dev->priv;
1478
1479         if (changed & BSS_CHANGED_ERP_SLOT) {
1480                 priv->use_short_slot = info->use_short_slot;
1481                 p54_set_edcf(dev);
1482         }
1483 }
1484
1485 static const struct ieee80211_ops p54_ops = {
1486         .tx                     = p54_tx,
1487         .start                  = p54_start,
1488         .stop                   = p54_stop,
1489         .add_interface          = p54_add_interface,
1490         .remove_interface       = p54_remove_interface,
1491         .config                 = p54_config,
1492         .config_interface       = p54_config_interface,
1493         .bss_info_changed       = p54_bss_info_changed,
1494         .configure_filter       = p54_configure_filter,
1495         .conf_tx                = p54_conf_tx,
1496         .get_stats              = p54_get_stats,
1497         .get_tx_stats           = p54_get_tx_stats
1498 };
1499
1500 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
1501 {
1502         struct ieee80211_hw *dev;
1503         struct p54_common *priv;
1504
1505         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1506         if (!dev)
1507                 return NULL;
1508
1509         priv = dev->priv;
1510         priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1511         skb_queue_head_init(&priv->tx_queue);
1512         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
1513                      IEEE80211_HW_RX_INCLUDES_FCS |
1514                      IEEE80211_HW_SIGNAL_DBM |
1515                      IEEE80211_HW_NOISE_DBM;
1516
1517         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1518
1519         dev->channel_change_time = 1000;        /* TODO: find actual value */
1520         priv->tx_stats[0].limit = 1;            /* Beacon queue */
1521         priv->tx_stats[1].limit = 1;            /* Probe queue for HW scan */
1522         priv->tx_stats[2].limit = 3;            /* queue for MLMEs */
1523         priv->tx_stats[3].limit = 3;            /* Broadcast / MC queue */
1524         priv->tx_stats[4].limit = 5;            /* Data */
1525         dev->queues = 1;
1526         priv->noise = -94;
1527         /*
1528          * We support at most 8 tries no matter which rate they're at,
1529          * we cannot support max_rates * max_rate_tries as we set it
1530          * here, but setting it correctly to 4/2 or so would limit us
1531          * artificially if the RC algorithm wants just two rates, so
1532          * let's say 4/7, we'll redistribute it at TX time, see the
1533          * comments there.
1534          */
1535         dev->max_rates = 4;
1536         dev->max_rate_tries = 7;
1537         dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
1538                                  sizeof(struct p54_tx_data);
1539
1540         mutex_init(&priv->conf_mutex);
1541         init_completion(&priv->eeprom_comp);
1542         init_completion(&priv->stats_comp);
1543         setup_timer(&priv->stats_timer, p54_statistics_timer,
1544                 (unsigned long)dev);
1545
1546         return dev;
1547 }
1548 EXPORT_SYMBOL_GPL(p54_init_common);
1549
1550 void p54_free_common(struct ieee80211_hw *dev)
1551 {
1552         struct p54_common *priv = dev->priv;
1553         del_timer(&priv->stats_timer);
1554         kfree_skb(priv->cached_stats);
1555         kfree(priv->iq_autocal);
1556         kfree(priv->output_limit);
1557         kfree(priv->curve_data);
1558 }
1559 EXPORT_SYMBOL_GPL(p54_free_common);
1560
1561 static int __init p54_init(void)
1562 {
1563         return 0;
1564 }
1565
1566 static void __exit p54_exit(void)
1567 {
1568 }
1569
1570 module_init(p54_init);
1571 module_exit(p54_exit);