linux/drivers/net/wireless/p54/p54common.c
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   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
  25MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  26MODULE_DESCRIPTION("Softmac Prism54 common code");
  27MODULE_LICENSE("GPL");
  28MODULE_ALIAS("prism54common");
  29
  30static struct ieee80211_rate p54_bgrates[] = {
  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
  45static struct ieee80211_channel p54_bgchannels[] = {
  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
  62static struct ieee80211_supported_band band_2GHz = {
  63        .channels = p54_bgchannels,
  64        .n_channels = ARRAY_SIZE(p54_bgchannels),
  65        .bitrates = p54_bgrates,
  66        .n_bitrates = ARRAY_SIZE(p54_bgrates),
  67};
  68
  69static struct ieee80211_rate p54_arates[] = {
  70        { .bitrate = 60, .hw_value = 4, },
  71        { .bitrate = 90, .hw_value = 5, },
  72        { .bitrate = 120, .hw_value = 6, },
  73        { .bitrate = 180, .hw_value = 7, },
  74        { .bitrate = 240, .hw_value = 8, },
  75        { .bitrate = 360, .hw_value = 9, },
  76        { .bitrate = 480, .hw_value = 10, },
  77        { .bitrate = 540, .hw_value = 11, },
  78};
  79
  80static struct ieee80211_channel p54_achannels[] = {
  81        { .center_freq = 4920 },
  82        { .center_freq = 4940 },
  83        { .center_freq = 4960 },
  84        { .center_freq = 4980 },
  85        { .center_freq = 5040 },
  86        { .center_freq = 5060 },
  87        { .center_freq = 5080 },
  88        { .center_freq = 5170 },
  89        { .center_freq = 5180 },
  90        { .center_freq = 5190 },
  91        { .center_freq = 5200 },
  92        { .center_freq = 5210 },
  93        { .center_freq = 5220 },
  94        { .center_freq = 5230 },
  95        { .center_freq = 5240 },
  96        { .center_freq = 5260 },
  97        { .center_freq = 5280 },
  98        { .center_freq = 5300 },
  99        { .center_freq = 5320 },
 100        { .center_freq = 5500 },
 101        { .center_freq = 5520 },
 102        { .center_freq = 5540 },
 103        { .center_freq = 5560 },
 104        { .center_freq = 5580 },
 105        { .center_freq = 5600 },
 106        { .center_freq = 5620 },
 107        { .center_freq = 5640 },
 108        { .center_freq = 5660 },
 109        { .center_freq = 5680 },
 110        { .center_freq = 5700 },
 111        { .center_freq = 5745 },
 112        { .center_freq = 5765 },
 113        { .center_freq = 5785 },
 114        { .center_freq = 5805 },
 115        { .center_freq = 5825 },
 116};
 117
 118static struct ieee80211_supported_band band_5GHz = {
 119        .channels = p54_achannels,
 120        .n_channels = ARRAY_SIZE(p54_achannels),
 121        .bitrates = p54_arates,
 122        .n_bitrates = ARRAY_SIZE(p54_arates),
 123};
 124
 125int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
 126{
 127        struct p54_common *priv = dev->priv;
 128        struct bootrec_exp_if *exp_if;
 129        struct bootrec *bootrec;
 130        u32 *data = (u32 *)fw->data;
 131        u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
 132        u8 *fw_version = NULL;
 133        size_t len;
 134        int i;
 135
 136        if (priv->rx_start)
 137                return 0;
 138
 139        while (data < end_data && *data)
 140                data++;
 141
 142        while (data < end_data && !*data)
 143                data++;
 144
 145        bootrec = (struct bootrec *) data;
 146
 147        while (bootrec->data <= end_data &&
 148               (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
 149                u32 code = le32_to_cpu(bootrec->code);
 150                switch (code) {
 151                case BR_CODE_COMPONENT_ID:
 152                        priv->fw_interface = be32_to_cpup((__be32 *)
 153                                             bootrec->data);
 154                        switch (priv->fw_interface) {
 155                        case FW_FMAC:
 156                                printk(KERN_INFO "p54: FreeMAC firmware\n");
 157                                break;
 158                        case FW_LM20:
 159                                printk(KERN_INFO "p54: LM20 firmware\n");
 160                                break;
 161                        case FW_LM86:
 162                                printk(KERN_INFO "p54: LM86 firmware\n");
 163                                break;
 164                        case FW_LM87:
 165                                printk(KERN_INFO "p54: LM87 firmware\n");
 166                                break;
 167                        default:
 168                                printk(KERN_INFO "p54: unknown firmware\n");
 169                                break;
 170                        }
 171                        break;
 172                case BR_CODE_COMPONENT_VERSION:
 173                        /* 24 bytes should be enough for all firmwares */
 174                        if (strnlen((unsigned char*)bootrec->data, 24) < 24)
 175                                fw_version = (unsigned char*)bootrec->data;
 176                        break;
 177                case BR_CODE_DESCR: {
 178                        struct bootrec_desc *desc =
 179                                (struct bootrec_desc *)bootrec->data;
 180                        priv->rx_start = le32_to_cpu(desc->rx_start);
 181                        /* FIXME add sanity checking */
 182                        priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
 183                        priv->headroom = desc->headroom;
 184                        priv->tailroom = desc->tailroom;
 185                        if (le32_to_cpu(bootrec->len) == 11)
 186                                priv->rx_mtu = le16_to_cpu(bootrec->rx_mtu);
 187                        else
 188                                priv->rx_mtu = (size_t)
 189                                        0x620 - priv->tx_hdr_len;
 190                        break;
 191                        }
 192                case BR_CODE_EXPOSED_IF:
 193                        exp_if = (struct bootrec_exp_if *) bootrec->data;
 194                        for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
 195                                if (exp_if[i].if_id == cpu_to_le16(0x1a))
 196                                        priv->fw_var = le16_to_cpu(exp_if[i].variant);
 197                        break;
 198                case BR_CODE_DEPENDENT_IF:
 199                        break;
 200                case BR_CODE_END_OF_BRA:
 201                case LEGACY_BR_CODE_END_OF_BRA:
 202                        end_data = NULL;
 203                        break;
 204                default:
 205                        break;
 206                }
 207                bootrec = (struct bootrec *)&bootrec->data[len];
 208        }
 209
 210        if (fw_version)
 211                printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
 212                        fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
 213
 214        if (priv->fw_var >= 0x300) {
 215                /* Firmware supports QoS, use it! */
 216                priv->tx_stats[4].limit = 3;
 217                priv->tx_stats[5].limit = 4;
 218                priv->tx_stats[6].limit = 3;
 219                priv->tx_stats[7].limit = 1;
 220                dev->queues = 4;
 221        }
 222
 223        return 0;
 224}
 225EXPORT_SYMBOL_GPL(p54_parse_firmware);
 226
 227static int p54_convert_rev0(struct ieee80211_hw *dev,
 228                            struct pda_pa_curve_data *curve_data)
 229{
 230        struct p54_common *priv = dev->priv;
 231        struct p54_pa_curve_data_sample *dst;
 232        struct pda_pa_curve_data_sample_rev0 *src;
 233        size_t cd_len = sizeof(*curve_data) +
 234                (curve_data->points_per_channel*sizeof(*dst) + 2) *
 235                 curve_data->channels;
 236        unsigned int i, j;
 237        void *source, *target;
 238
 239        priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 240        if (!priv->curve_data)
 241                return -ENOMEM;
 242
 243        memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 244        source = curve_data->data;
 245        target = priv->curve_data->data;
 246        for (i = 0; i < curve_data->channels; i++) {
 247                __le16 *freq = source;
 248                source += sizeof(__le16);
 249                *((__le16 *)target) = *freq;
 250                target += sizeof(__le16);
 251                for (j = 0; j < curve_data->points_per_channel; j++) {
 252                        dst = target;
 253                        src = source;
 254
 255                        dst->rf_power = src->rf_power;
 256                        dst->pa_detector = src->pa_detector;
 257                        dst->data_64qam = src->pcv;
 258                        /* "invent" the points for the other modulations */
 259#define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 260                        dst->data_16qam = SUB(src->pcv, 12);
 261                        dst->data_qpsk = SUB(dst->data_16qam, 12);
 262                        dst->data_bpsk = SUB(dst->data_qpsk, 12);
 263                        dst->data_barker = SUB(dst->data_bpsk, 14);
 264#undef SUB
 265                        target += sizeof(*dst);
 266                        source += sizeof(*src);
 267                }
 268        }
 269
 270        return 0;
 271}
 272
 273static int p54_convert_rev1(struct ieee80211_hw *dev,
 274                            struct pda_pa_curve_data *curve_data)
 275{
 276        struct p54_common *priv = dev->priv;
 277        struct p54_pa_curve_data_sample *dst;
 278        struct pda_pa_curve_data_sample_rev1 *src;
 279        size_t cd_len = sizeof(*curve_data) +
 280                (curve_data->points_per_channel*sizeof(*dst) + 2) *
 281                 curve_data->channels;
 282        unsigned int i, j;
 283        void *source, *target;
 284
 285        priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 286        if (!priv->curve_data)
 287                return -ENOMEM;
 288
 289        memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 290        source = curve_data->data;
 291        target = priv->curve_data->data;
 292        for (i = 0; i < curve_data->channels; i++) {
 293                __le16 *freq = source;
 294                source += sizeof(__le16);
 295                *((__le16 *)target) = *freq;
 296                target += sizeof(__le16);
 297                for (j = 0; j < curve_data->points_per_channel; j++) {
 298                        memcpy(target, source, sizeof(*src));
 299
 300                        target += sizeof(*dst);
 301                        source += sizeof(*src);
 302                }
 303                source++;
 304        }
 305
 306        return 0;
 307}
 308
 309static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
 310                              "Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
 311static int p54_init_xbow_synth(struct ieee80211_hw *dev);
 312
 313static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 314{
 315        struct p54_common *priv = dev->priv;
 316        struct eeprom_pda_wrap *wrap = NULL;
 317        struct pda_entry *entry;
 318        unsigned int data_len, entry_len;
 319        void *tmp;
 320        int err;
 321        u8 *end = (u8 *)eeprom + len;
 322        u16 synth = 0;
 323        DECLARE_MAC_BUF(mac);
 324
 325        wrap = (struct eeprom_pda_wrap *) eeprom;
 326        entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 327
 328        /* verify that at least the entry length/code fits */
 329        while ((u8 *)entry <= end - sizeof(*entry)) {
 330                entry_len = le16_to_cpu(entry->len);
 331                data_len = ((entry_len - 1) << 1);
 332
 333                /* abort if entry exceeds whole structure */
 334                if ((u8 *)entry + sizeof(*entry) + data_len > end)
 335                        break;
 336
 337                switch (le16_to_cpu(entry->code)) {
 338                case PDR_MAC_ADDRESS:
 339                        SET_IEEE80211_PERM_ADDR(dev, entry->data);
 340                        break;
 341                case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 342                        if (data_len < 2) {
 343                                err = -EINVAL;
 344                                goto err;
 345                        }
 346
 347                        if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 348                                err = -EINVAL;
 349                                goto err;
 350                        }
 351
 352                        priv->output_limit = kmalloc(entry->data[1] *
 353                                sizeof(*priv->output_limit), GFP_KERNEL);
 354
 355                        if (!priv->output_limit) {
 356                                err = -ENOMEM;
 357                                goto err;
 358                        }
 359
 360                        memcpy(priv->output_limit, &entry->data[2],
 361                               entry->data[1]*sizeof(*priv->output_limit));
 362                        priv->output_limit_len = entry->data[1];
 363                        break;
 364                case PDR_PRISM_PA_CAL_CURVE_DATA: {
 365                        struct pda_pa_curve_data *curve_data =
 366                                (struct pda_pa_curve_data *)entry->data;
 367                        if (data_len < sizeof(*curve_data)) {
 368                                err = -EINVAL;
 369                                goto err;
 370                        }
 371
 372                        switch (curve_data->cal_method_rev) {
 373                        case 0:
 374                                err = p54_convert_rev0(dev, curve_data);
 375                                break;
 376                        case 1:
 377                                err = p54_convert_rev1(dev, curve_data);
 378                                break;
 379                        default:
 380                                printk(KERN_ERR "p54: unknown curve data "
 381                                                "revision %d\n",
 382                                                curve_data->cal_method_rev);
 383                                err = -ENODEV;
 384                                break;
 385                        }
 386                        if (err)
 387                                goto err;
 388
 389                }
 390                case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 391                        priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 392                        if (!priv->iq_autocal) {
 393                                err = -ENOMEM;
 394                                goto err;
 395                        }
 396
 397                        memcpy(priv->iq_autocal, entry->data, data_len);
 398                        priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 399                        break;
 400                case PDR_INTERFACE_LIST:
 401                        tmp = entry->data;
 402                        while ((u8 *)tmp < entry->data + data_len) {
 403                                struct bootrec_exp_if *exp_if = tmp;
 404                                if (le16_to_cpu(exp_if->if_id) == 0xf)
 405                                        synth = le16_to_cpu(exp_if->variant);
 406                                tmp += sizeof(struct bootrec_exp_if);
 407                        }
 408                        break;
 409                case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 410                        priv->version = *(u8 *)(entry->data + 1);
 411                        break;
 412                case PDR_END:
 413                        /* make it overrun */
 414                        entry_len = len;
 415                        break;
 416                default:
 417                        printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
 418                                le16_to_cpu(entry->code));
 419                        break;
 420                }
 421
 422                entry = (void *)entry + (entry_len + 1)*2;
 423        }
 424
 425        if (!synth || !priv->iq_autocal || !priv->output_limit ||
 426            !priv->curve_data) {
 427                printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 428                err = -EINVAL;
 429                goto err;
 430        }
 431
 432        priv->rxhw = synth & 0x07;
 433        if (priv->rxhw == 4)
 434                p54_init_xbow_synth(dev);
 435        if (!(synth & 0x40))
 436                dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 437        if (!(synth & 0x80))
 438                dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
 439
 440        if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 441                u8 perm_addr[ETH_ALEN];
 442
 443                printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
 444                        wiphy_name(dev->wiphy));
 445                random_ether_addr(perm_addr);
 446                SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 447        }
 448
 449        printk(KERN_INFO "%s: hwaddr %s, MAC:isl38%02x RF:%s\n",
 450                wiphy_name(dev->wiphy),
 451                print_mac(mac, dev->wiphy->perm_addr),
 452                priv->version, p54_rf_chips[priv->rxhw]);
 453
 454        return 0;
 455
 456  err:
 457        if (priv->iq_autocal) {
 458                kfree(priv->iq_autocal);
 459                priv->iq_autocal = NULL;
 460        }
 461
 462        if (priv->output_limit) {
 463                kfree(priv->output_limit);
 464                priv->output_limit = NULL;
 465        }
 466
 467        if (priv->curve_data) {
 468                kfree(priv->curve_data);
 469                priv->curve_data = NULL;
 470        }
 471
 472        printk(KERN_ERR "p54: eeprom parse failed!\n");
 473        return err;
 474}
 475
 476static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
 477{
 478        /* TODO: get the rssi_add & rssi_mul data from the eeprom */
 479        return ((rssi * 0x83) / 64 - 400) / 4;
 480}
 481
 482static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 483{
 484        struct p54_common *priv = dev->priv;
 485        struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
 486        struct ieee80211_rx_status rx_status = {0};
 487        u16 freq = le16_to_cpu(hdr->freq);
 488        size_t header_len = sizeof(*hdr);
 489        u32 tsf32;
 490
 491        if (!(hdr->magic & cpu_to_le16(0x0001))) {
 492                if (priv->filter_flags & FIF_FCSFAIL)
 493                        rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 494                else
 495                        return 0;
 496        }
 497
 498        rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
 499        rx_status.noise = priv->noise;
 500        /* XX correct? */
 501        rx_status.qual = (100 * hdr->rssi) / 127;
 502        rx_status.rate_idx = (dev->conf.channel->band == IEEE80211_BAND_2GHZ ?
 503                        hdr->rate : (hdr->rate - 4)) & 0xf;
 504        rx_status.freq = freq;
 505        rx_status.band =  dev->conf.channel->band;
 506        rx_status.antenna = hdr->antenna;
 507
 508        tsf32 = le32_to_cpu(hdr->tsf32);
 509        if (tsf32 < priv->tsf_low32)
 510                priv->tsf_high32++;
 511        rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
 512        priv->tsf_low32 = tsf32;
 513
 514        rx_status.flag |= RX_FLAG_TSFT;
 515
 516        if (hdr->magic & cpu_to_le16(0x4000))
 517                header_len += hdr->align[0];
 518
 519        skb_pull(skb, header_len);
 520        skb_trim(skb, le16_to_cpu(hdr->len));
 521
 522        ieee80211_rx_irqsafe(dev, skb, &rx_status);
 523
 524        return -1;
 525}
 526
 527static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 528{
 529        struct p54_common *priv = dev->priv;
 530        int i;
 531
 532        for (i = 0; i < dev->queues; i++)
 533                if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
 534                        ieee80211_wake_queue(dev, i);
 535}
 536
 537static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 538{
 539        struct p54_common *priv = dev->priv;
 540        struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 541        struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
 542        struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 543        u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
 544        struct memrecord *range = NULL;
 545        u32 freed = 0;
 546        u32 last_addr = priv->rx_start;
 547        unsigned long flags;
 548
 549        spin_lock_irqsave(&priv->tx_queue.lock, flags);
 550        while (entry != (struct sk_buff *)&priv->tx_queue) {
 551                struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 552                range = (void *)info->driver_data;
 553                if (range->start_addr == addr) {
 554                        struct p54_control_hdr *entry_hdr;
 555                        struct p54_tx_control_allocdata *entry_data;
 556                        int pad = 0;
 557
 558                        if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 559                                struct ieee80211_tx_info *ni;
 560                                struct memrecord *mr;
 561
 562                                ni = IEEE80211_SKB_CB(entry->next);
 563                                mr = (struct memrecord *)ni->driver_data;
 564                                freed = mr->start_addr - last_addr;
 565                        } else
 566                                freed = priv->rx_end - last_addr;
 567
 568                        last_addr = range->end_addr;
 569                        __skb_unlink(entry, &priv->tx_queue);
 570                        spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 571
 572                        memset(&info->status, 0, sizeof(info->status));
 573                        entry_hdr = (struct p54_control_hdr *) entry->data;
 574                        entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
 575                        if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
 576                                pad = entry_data->align[0];
 577
 578                        priv->tx_stats[entry_data->hw_queue].len--;
 579                        if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 580                                if (!(payload->status & 0x01))
 581                                        info->flags |= IEEE80211_TX_STAT_ACK;
 582                                else
 583                                        info->status.excessive_retries = 1;
 584                        }
 585                        info->status.retry_count = payload->retries - 1;
 586                        info->status.ack_signal = p54_rssi_to_dbm(dev,
 587                                        le16_to_cpu(payload->ack_rssi));
 588                        skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 589                        ieee80211_tx_status_irqsafe(dev, entry);
 590                        goto out;
 591                } else
 592                        last_addr = range->end_addr;
 593                entry = entry->next;
 594        }
 595        spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 596
 597out:
 598        if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 599            sizeof(struct p54_control_hdr))
 600                p54_wake_free_queues(dev);
 601}
 602
 603static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
 604                                   struct sk_buff *skb)
 605{
 606        struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 607        struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
 608        struct p54_common *priv = dev->priv;
 609
 610        if (!priv->eeprom)
 611                return ;
 612
 613        memcpy(priv->eeprom, eeprom->data, le16_to_cpu(eeprom->len));
 614
 615        complete(&priv->eeprom_comp);
 616}
 617
 618static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
 619{
 620        struct p54_common *priv = dev->priv;
 621        struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 622        struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
 623        u32 tsf32 = le32_to_cpu(stats->tsf32);
 624
 625        if (tsf32 < priv->tsf_low32)
 626                priv->tsf_high32++;
 627        priv->tsf_low32 = tsf32;
 628
 629        priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
 630        priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
 631        priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
 632
 633        priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
 634        complete(&priv->stats_comp);
 635
 636        mod_timer(&priv->stats_timer, jiffies + 5 * HZ);
 637}
 638
 639static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 640{
 641        struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 642
 643        switch (le16_to_cpu(hdr->type)) {
 644        case P54_CONTROL_TYPE_TXDONE:
 645                p54_rx_frame_sent(dev, skb);
 646                break;
 647        case P54_CONTROL_TYPE_BBP:
 648                break;
 649        case P54_CONTROL_TYPE_STAT_READBACK:
 650                p54_rx_stats(dev, skb);
 651                break;
 652        case P54_CONTROL_TYPE_EEPROM_READBACK:
 653                p54_rx_eeprom_readback(dev, skb);
 654                break;
 655        default:
 656                printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 657                       wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 658                break;
 659        }
 660
 661        return 0;
 662}
 663
 664/* returns zero if skb can be reused */
 665int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 666{
 667        u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
 668
 669        if (type == 0x80)
 670                return p54_rx_control(dev, skb);
 671        else
 672                return p54_rx_data(dev, skb);
 673}
 674EXPORT_SYMBOL_GPL(p54_rx);
 675
 676/*
 677 * So, the firmware is somewhat stupid and doesn't know what places in its
 678 * memory incoming data should go to. By poking around in the firmware, we
 679 * can find some unused memory to upload our packets to. However, data that we
 680 * want the card to TX needs to stay intact until the card has told us that
 681 * it is done with it. This function finds empty places we can upload to and
 682 * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 683 * allocated areas.
 684 */
 685static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 686                               struct p54_control_hdr *data, u32 len)
 687{
 688        struct p54_common *priv = dev->priv;
 689        struct sk_buff *entry = priv->tx_queue.next;
 690        struct sk_buff *target_skb = NULL;
 691        u32 last_addr = priv->rx_start;
 692        u32 largest_hole = 0;
 693        u32 target_addr = priv->rx_start;
 694        unsigned long flags;
 695        unsigned int left;
 696        len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
 697
 698        spin_lock_irqsave(&priv->tx_queue.lock, flags);
 699        left = skb_queue_len(&priv->tx_queue);
 700        while (left--) {
 701                u32 hole_size;
 702                struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 703                struct memrecord *range = (void *)info->driver_data;
 704                hole_size = range->start_addr - last_addr;
 705                if (!target_skb && hole_size >= len) {
 706                        target_skb = entry->prev;
 707                        hole_size -= len;
 708                        target_addr = last_addr;
 709                }
 710                largest_hole = max(largest_hole, hole_size);
 711                last_addr = range->end_addr;
 712                entry = entry->next;
 713        }
 714        if (!target_skb && priv->rx_end - last_addr >= len) {
 715                target_skb = priv->tx_queue.prev;
 716                largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 717                if (!skb_queue_empty(&priv->tx_queue)) {
 718                        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(target_skb);
 719                        struct memrecord *range = (void *)info->driver_data;
 720                        target_addr = range->end_addr;
 721                }
 722        } else
 723                largest_hole = max(largest_hole, priv->rx_end - last_addr);
 724
 725        if (skb) {
 726                struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 727                struct memrecord *range = (void *)info->driver_data;
 728                range->start_addr = target_addr;
 729                range->end_addr = target_addr + len;
 730                __skb_queue_after(&priv->tx_queue, target_skb, skb);
 731                if (largest_hole < priv->rx_mtu + priv->headroom +
 732                                   priv->tailroom +
 733                                   sizeof(struct p54_control_hdr))
 734                        ieee80211_stop_queues(dev);
 735        }
 736        spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 737
 738        data->req_id = cpu_to_le32(target_addr + priv->headroom);
 739}
 740
 741int p54_read_eeprom(struct ieee80211_hw *dev)
 742{
 743        struct p54_common *priv = dev->priv;
 744        struct p54_control_hdr *hdr = NULL;
 745        struct p54_eeprom_lm86 *eeprom_hdr;
 746        size_t eeprom_size = 0x2020, offset = 0, blocksize;
 747        int ret = -ENOMEM;
 748        void *eeprom = NULL;
 749
 750        hdr = (struct p54_control_hdr *)kzalloc(sizeof(*hdr) +
 751                sizeof(*eeprom_hdr) + EEPROM_READBACK_LEN, GFP_KERNEL);
 752        if (!hdr)
 753                goto free;
 754
 755        priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
 756        if (!priv->eeprom)
 757                goto free;
 758
 759        eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 760        if (!eeprom)
 761                goto free;
 762
 763        hdr->magic1 = cpu_to_le16(0x8000);
 764        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
 765        hdr->retry1 = hdr->retry2 = 0;
 766        eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
 767
 768        while (eeprom_size) {
 769                blocksize = min(eeprom_size, (size_t)EEPROM_READBACK_LEN);
 770                hdr->len = cpu_to_le16(blocksize + sizeof(*eeprom_hdr));
 771                eeprom_hdr->offset = cpu_to_le16(offset);
 772                eeprom_hdr->len = cpu_to_le16(blocksize);
 773                p54_assign_address(dev, NULL, hdr, le16_to_cpu(hdr->len) +
 774                                   sizeof(*hdr));
 775                priv->tx(dev, hdr, le16_to_cpu(hdr->len) + sizeof(*hdr), 0);
 776
 777                if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
 778                        printk(KERN_ERR "%s: device does not respond!\n",
 779                                wiphy_name(dev->wiphy));
 780                        ret = -EBUSY;
 781                        goto free;
 782                }
 783
 784                memcpy(eeprom + offset, priv->eeprom, blocksize);
 785                offset += blocksize;
 786                eeprom_size -= blocksize;
 787        }
 788
 789        ret = p54_parse_eeprom(dev, eeprom, offset);
 790free:
 791        kfree(priv->eeprom);
 792        priv->eeprom = NULL;
 793        kfree(hdr);
 794        kfree(eeprom);
 795
 796        return ret;
 797}
 798EXPORT_SYMBOL_GPL(p54_read_eeprom);
 799
 800static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 801{
 802        struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 803        struct ieee80211_tx_queue_stats *current_queue;
 804        struct p54_common *priv = dev->priv;
 805        struct p54_control_hdr *hdr;
 806        struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
 807        struct p54_tx_control_allocdata *txhdr;
 808        size_t padding, len;
 809        u8 rate;
 810        u8 cts_rate = 0x20;
 811
 812        current_queue = &priv->tx_stats[skb_get_queue_mapping(skb) + 4];
 813        if (unlikely(current_queue->len > current_queue->limit))
 814                return NETDEV_TX_BUSY;
 815        current_queue->len++;
 816        current_queue->count++;
 817        if (current_queue->len == current_queue->limit)
 818                ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
 819
 820        padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 821        len = skb->len;
 822
 823        txhdr = (struct p54_tx_control_allocdata *)
 824                        skb_push(skb, sizeof(*txhdr) + padding);
 825        hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
 826
 827        if (padding)
 828                hdr->magic1 = cpu_to_le16(0x4010);
 829        else
 830                hdr->magic1 = cpu_to_le16(0x0010);
 831        hdr->len = cpu_to_le16(len);
 832        hdr->type = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 0 : cpu_to_le16(1);
 833        hdr->retry1 = hdr->retry2 = info->control.retry_limit;
 834
 835        /* TODO: add support for alternate retry TX rates */
 836        rate = ieee80211_get_tx_rate(dev, info)->hw_value;
 837        if (info->flags & IEEE80211_TX_CTL_SHORT_PREAMBLE) {
 838                rate |= 0x10;
 839                cts_rate |= 0x10;
 840        }
 841        if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
 842                rate |= 0x40;
 843                cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
 844        } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
 845                rate |= 0x20;
 846                cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
 847        }
 848        memset(txhdr->rateset, rate, 8);
 849        txhdr->key_type = 0;
 850        txhdr->key_len = 0;
 851        txhdr->hw_queue = skb_get_queue_mapping(skb) + 4;
 852        txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
 853                2 : info->antenna_sel_tx - 1;
 854        txhdr->output_power = priv->output_power;
 855        txhdr->cts_rate = (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
 856                          0 : cts_rate;
 857        if (padding)
 858                txhdr->align[0] = padding;
 859
 860        /* FIXME: The sequence that follows is needed for this driver to
 861         * work with mac80211 since "mac80211: fix TX sequence numbers".
 862         * As with the temporary code in rt2x00, changes will be needed
 863         * to get proper sequence numbers on beacons. In addition, this
 864         * patch places the sequence number in the hardware state, which
 865         * limits us to a single virtual state.
 866         */
 867        if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 868                if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 869                        priv->seqno += 0x10;
 870                ieee80211hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 871                ieee80211hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
 872        }
 873        /* modifies skb->cb and with it info, so must be last! */
 874        p54_assign_address(dev, skb, hdr, skb->len);
 875
 876        priv->tx(dev, hdr, skb->len, 0);
 877        return 0;
 878}
 879
 880static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
 881                          const u8 *bssid)
 882{
 883        struct p54_common *priv = dev->priv;
 884        struct p54_control_hdr *hdr;
 885        struct p54_tx_control_filter *filter;
 886        size_t data_len;
 887
 888        hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
 889                      priv->tx_hdr_len, GFP_ATOMIC);
 890        if (!hdr)
 891                return -ENOMEM;
 892
 893        hdr = (void *)hdr + priv->tx_hdr_len;
 894
 895        filter = (struct p54_tx_control_filter *) hdr->data;
 896        hdr->magic1 = cpu_to_le16(0x8001);
 897        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
 898
 899        priv->filter_type = filter->filter_type = cpu_to_le16(filter_type);
 900        memcpy(filter->mac_addr, priv->mac_addr, ETH_ALEN);
 901        if (!bssid)
 902                memset(filter->bssid, ~0, ETH_ALEN);
 903        else
 904                memcpy(filter->bssid, bssid, ETH_ALEN);
 905
 906        filter->rx_antenna = priv->rx_antenna;
 907
 908        if (priv->fw_var < 0x500) {
 909                data_len = P54_TX_CONTROL_FILTER_V1_LEN;
 910                filter->v1.basic_rate_mask = cpu_to_le32(0x15F);
 911                filter->v1.rx_addr = cpu_to_le32(priv->rx_end);
 912                filter->v1.max_rx = cpu_to_le16(priv->rx_mtu);
 913                filter->v1.rxhw = cpu_to_le16(priv->rxhw);
 914                filter->v1.wakeup_timer = cpu_to_le16(500);
 915        } else {
 916                data_len = P54_TX_CONTROL_FILTER_V2_LEN;
 917                filter->v2.rx_addr = cpu_to_le32(priv->rx_end);
 918                filter->v2.max_rx = cpu_to_le16(priv->rx_mtu);
 919                filter->v2.rxhw = cpu_to_le16(priv->rxhw);
 920                filter->v2.timer = cpu_to_le16(1000);
 921        }
 922
 923        hdr->len = cpu_to_le16(data_len);
 924        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + data_len);
 925        priv->tx(dev, hdr, sizeof(*hdr) + data_len, 1);
 926        return 0;
 927}
 928
 929static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
 930{
 931        struct p54_common *priv = dev->priv;
 932        struct p54_control_hdr *hdr;
 933        struct p54_tx_control_channel *chan;
 934        unsigned int i;
 935        size_t data_len;
 936        void *entry;
 937
 938        hdr = kzalloc(sizeof(*hdr) + sizeof(*chan) +
 939                      priv->tx_hdr_len, GFP_KERNEL);
 940        if (!hdr)
 941                return -ENOMEM;
 942
 943        hdr = (void *)hdr + priv->tx_hdr_len;
 944
 945        chan = (struct p54_tx_control_channel *) hdr->data;
 946
 947        hdr->magic1 = cpu_to_le16(0x8001);
 948
 949        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
 950
 951        chan->flags = cpu_to_le16(0x1);
 952        chan->dwell = cpu_to_le16(0x0);
 953
 954        for (i = 0; i < priv->iq_autocal_len; i++) {
 955                if (priv->iq_autocal[i].freq != freq)
 956                        continue;
 957
 958                memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
 959                       sizeof(*priv->iq_autocal));
 960                break;
 961        }
 962        if (i == priv->iq_autocal_len)
 963                goto err;
 964
 965        for (i = 0; i < priv->output_limit_len; i++) {
 966                if (priv->output_limit[i].freq != freq)
 967                        continue;
 968
 969                chan->val_barker = 0x38;
 970                chan->val_bpsk = chan->dup_bpsk =
 971                        priv->output_limit[i].val_bpsk;
 972                chan->val_qpsk = chan->dup_qpsk =
 973                        priv->output_limit[i].val_qpsk;
 974                chan->val_16qam = chan->dup_16qam =
 975                        priv->output_limit[i].val_16qam;
 976                chan->val_64qam = chan->dup_64qam =
 977                        priv->output_limit[i].val_64qam;
 978                break;
 979        }
 980        if (i == priv->output_limit_len)
 981                goto err;
 982
 983        entry = priv->curve_data->data;
 984        for (i = 0; i < priv->curve_data->channels; i++) {
 985                if (*((__le16 *)entry) != freq) {
 986                        entry += sizeof(__le16);
 987                        entry += sizeof(struct p54_pa_curve_data_sample) *
 988                                 priv->curve_data->points_per_channel;
 989                        continue;
 990                }
 991
 992                entry += sizeof(__le16);
 993                chan->pa_points_per_curve =
 994                        min(priv->curve_data->points_per_channel, (u8) 8);
 995
 996                memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
 997                       chan->pa_points_per_curve);
 998                break;
 999        }
1000
1001        if (priv->fw_var < 0x500) {
1002                data_len = P54_TX_CONTROL_CHANNEL_V1_LEN;
1003                chan->v1.rssical_mul = cpu_to_le16(130);
1004                chan->v1.rssical_add = cpu_to_le16(0xfe70);
1005        } else {
1006                data_len = P54_TX_CONTROL_CHANNEL_V2_LEN;
1007                chan->v2.rssical_mul = cpu_to_le16(130);
1008                chan->v2.rssical_add = cpu_to_le16(0xfe70);
1009                chan->v2.basic_rate_mask = cpu_to_le32(0x15f);
1010        }
1011
1012        hdr->len = cpu_to_le16(data_len);
1013        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + data_len);
1014        priv->tx(dev, hdr, sizeof(*hdr) + data_len, 1);
1015        return 0;
1016
1017 err:
1018        printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
1019        kfree(hdr);
1020        return -EINVAL;
1021}
1022
1023static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
1024{
1025        struct p54_common *priv = dev->priv;
1026        struct p54_control_hdr *hdr;
1027        struct p54_tx_control_led *led;
1028
1029        hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
1030                      priv->tx_hdr_len, GFP_KERNEL);
1031        if (!hdr)
1032                return -ENOMEM;
1033
1034        hdr = (void *)hdr + priv->tx_hdr_len;
1035        hdr->magic1 = cpu_to_le16(0x8001);
1036        hdr->len = cpu_to_le16(sizeof(*led));
1037        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
1038        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led));
1039
1040        led = (struct p54_tx_control_led *) hdr->data;
1041        led->mode = cpu_to_le16(mode);
1042        led->led_permanent = cpu_to_le16(link);
1043        led->led_temporary = cpu_to_le16(act);
1044        led->duration = cpu_to_le16(1000);
1045
1046        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
1047
1048        return 0;
1049}
1050
1051#define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
1052do {                                                            \
1053        queue.aifs = cpu_to_le16(ai_fs);                        \
1054        queue.cwmin = cpu_to_le16(cw_min);                      \
1055        queue.cwmax = cpu_to_le16(cw_max);                      \
1056        queue.txop = cpu_to_le16(_txop);                        \
1057} while(0)
1058
1059static void p54_init_vdcf(struct ieee80211_hw *dev)
1060{
1061        struct p54_common *priv = dev->priv;
1062        struct p54_control_hdr *hdr;
1063        struct p54_tx_control_vdcf *vdcf;
1064
1065        /* all USB V1 adapters need a extra headroom */
1066        hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
1067        hdr->magic1 = cpu_to_le16(0x8001);
1068        hdr->len = cpu_to_le16(sizeof(*vdcf));
1069        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
1070        hdr->req_id = cpu_to_le32(priv->rx_start);
1071
1072        vdcf = (struct p54_tx_control_vdcf *) hdr->data;
1073
1074        P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 47);
1075        P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 94);
1076        P54_SET_QUEUE(vdcf->queue[2], 0x0003, 0x000f, 0x03ff, 0);
1077        P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0);
1078}
1079
1080static void p54_set_vdcf(struct ieee80211_hw *dev)
1081{
1082        struct p54_common *priv = dev->priv;
1083        struct p54_control_hdr *hdr;
1084        struct p54_tx_control_vdcf *vdcf;
1085
1086        hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
1087
1088        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf));
1089
1090        vdcf = (struct p54_tx_control_vdcf *) hdr->data;
1091
1092        if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
1093                vdcf->slottime = 9;
1094                vdcf->magic1 = 0x10;
1095                vdcf->magic2 = 0x00;
1096        } else {
1097                vdcf->slottime = 20;
1098                vdcf->magic1 = 0x0a;
1099                vdcf->magic2 = 0x06;
1100        }
1101
1102        /* (see prism54/isl_oid.h for further details) */
1103        vdcf->frameburst = cpu_to_le16(0);
1104
1105        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
1106}
1107
1108static int p54_start(struct ieee80211_hw *dev)
1109{
1110        struct p54_common *priv = dev->priv;
1111        int err;
1112
1113        if (!priv->cached_vdcf) {
1114                priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf)+
1115                        priv->tx_hdr_len + sizeof(struct p54_control_hdr),
1116                        GFP_KERNEL);
1117
1118                if (!priv->cached_vdcf)
1119                        return -ENOMEM;
1120        }
1121
1122        if (!priv->cached_stats) {
1123                priv->cached_stats = kzalloc(sizeof(struct p54_statistics) +
1124                        priv->tx_hdr_len + sizeof(struct p54_control_hdr),
1125                        GFP_KERNEL);
1126
1127                if (!priv->cached_stats) {
1128                        kfree(priv->cached_vdcf);
1129                        priv->cached_vdcf = NULL;
1130                        return -ENOMEM;
1131                }
1132        }
1133
1134        err = priv->open(dev);
1135        if (!err)
1136                priv->mode = NL80211_IFTYPE_MONITOR;
1137
1138        p54_init_vdcf(dev);
1139
1140        mod_timer(&priv->stats_timer, jiffies + HZ);
1141        return err;
1142}
1143
1144static void p54_stop(struct ieee80211_hw *dev)
1145{
1146        struct p54_common *priv = dev->priv;
1147        struct sk_buff *skb;
1148
1149        del_timer(&priv->stats_timer);
1150        while ((skb = skb_dequeue(&priv->tx_queue)))
1151                kfree_skb(skb);
1152        priv->stop(dev);
1153        priv->tsf_high32 = priv->tsf_low32 = 0;
1154        priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1155}
1156
1157static int p54_add_interface(struct ieee80211_hw *dev,
1158                             struct ieee80211_if_init_conf *conf)
1159{
1160        struct p54_common *priv = dev->priv;
1161
1162        if (priv->mode != NL80211_IFTYPE_MONITOR)
1163                return -EOPNOTSUPP;
1164
1165        switch (conf->type) {
1166        case NL80211_IFTYPE_STATION:
1167                priv->mode = conf->type;
1168                break;
1169        default:
1170                return -EOPNOTSUPP;
1171        }
1172
1173        memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
1174
1175        p54_set_filter(dev, 0, NULL);
1176
1177        switch (conf->type) {
1178        case NL80211_IFTYPE_STATION:
1179                p54_set_filter(dev, 1, NULL);
1180                break;
1181        default:
1182                BUG();  /* impossible */
1183                break;
1184        }
1185
1186        p54_set_leds(dev, 1, 0, 0);
1187
1188        return 0;
1189}
1190
1191static void p54_remove_interface(struct ieee80211_hw *dev,
1192                                 struct ieee80211_if_init_conf *conf)
1193{
1194        struct p54_common *priv = dev->priv;
1195        priv->mode = NL80211_IFTYPE_MONITOR;
1196        memset(priv->mac_addr, 0, ETH_ALEN);
1197        p54_set_filter(dev, 0, NULL);
1198}
1199
1200static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
1201{
1202        int ret;
1203        struct p54_common *priv = dev->priv;
1204
1205        mutex_lock(&priv->conf_mutex);
1206        priv->rx_antenna = (conf->antenna_sel_rx == 0) ?
1207                2 : conf->antenna_sel_tx - 1;
1208        priv->output_power = conf->power_level << 2;
1209        ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
1210        p54_set_vdcf(dev);
1211        mutex_unlock(&priv->conf_mutex);
1212        return ret;
1213}
1214
1215static int p54_config_interface(struct ieee80211_hw *dev,
1216                                struct ieee80211_vif *vif,
1217                                struct ieee80211_if_conf *conf)
1218{
1219        struct p54_common *priv = dev->priv;
1220
1221        mutex_lock(&priv->conf_mutex);
1222        p54_set_filter(dev, 0, conf->bssid);
1223        p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
1224        memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1225        mutex_unlock(&priv->conf_mutex);
1226        return 0;
1227}
1228
1229static void p54_configure_filter(struct ieee80211_hw *dev,
1230                                 unsigned int changed_flags,
1231                                 unsigned int *total_flags,
1232                                 int mc_count, struct dev_mc_list *mclist)
1233{
1234        struct p54_common *priv = dev->priv;
1235
1236        *total_flags &= FIF_BCN_PRBRESP_PROMISC |
1237                        FIF_PROMISC_IN_BSS |
1238                        FIF_FCSFAIL;
1239
1240        priv->filter_flags = *total_flags;
1241
1242        if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1243                if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1244                        p54_set_filter(dev, le16_to_cpu(priv->filter_type),
1245                                 NULL);
1246                else
1247                        p54_set_filter(dev, le16_to_cpu(priv->filter_type),
1248                                 priv->bssid);
1249        }
1250
1251        if (changed_flags & FIF_PROMISC_IN_BSS) {
1252                if (*total_flags & FIF_PROMISC_IN_BSS)
1253                        p54_set_filter(dev, le16_to_cpu(priv->filter_type) |
1254                                0x8, NULL);
1255                else
1256                        p54_set_filter(dev, le16_to_cpu(priv->filter_type) &
1257                                ~0x8, priv->bssid);
1258        }
1259}
1260
1261static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1262                       const struct ieee80211_tx_queue_params *params)
1263{
1264        struct p54_common *priv = dev->priv;
1265        struct p54_tx_control_vdcf *vdcf;
1266
1267        vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
1268                ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
1269
1270        if ((params) && !(queue > 4)) {
1271                P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
1272                        params->cw_min, params->cw_max, params->txop);
1273        } else
1274                return -EINVAL;
1275
1276        p54_set_vdcf(dev);
1277
1278        return 0;
1279}
1280
1281static int p54_init_xbow_synth(struct ieee80211_hw *dev)
1282{
1283        struct p54_common *priv = dev->priv;
1284        struct p54_control_hdr *hdr;
1285        struct p54_tx_control_xbow_synth *xbow;
1286
1287        hdr = kzalloc(sizeof(*hdr) + sizeof(*xbow) +
1288                      priv->tx_hdr_len, GFP_KERNEL);
1289        if (!hdr)
1290                return -ENOMEM;
1291
1292        hdr = (void *)hdr + priv->tx_hdr_len;
1293        hdr->magic1 = cpu_to_le16(0x8001);
1294        hdr->len = cpu_to_le16(sizeof(*xbow));
1295        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_XBOW_SYNTH_CFG);
1296        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*xbow));
1297
1298        xbow = (struct p54_tx_control_xbow_synth *) hdr->data;
1299        xbow->magic1 = cpu_to_le16(0x1);
1300        xbow->magic2 = cpu_to_le16(0x2);
1301        xbow->freq = cpu_to_le16(5390);
1302
1303        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*xbow), 1);
1304
1305        return 0;
1306}
1307
1308static void p54_statistics_timer(unsigned long data)
1309{
1310        struct ieee80211_hw *dev = (struct ieee80211_hw *) data;
1311        struct p54_common *priv = dev->priv;
1312        struct p54_control_hdr *hdr;
1313        struct p54_statistics *stats;
1314
1315        BUG_ON(!priv->cached_stats);
1316
1317        hdr = (void *)priv->cached_stats + priv->tx_hdr_len;
1318        hdr->magic1 = cpu_to_le16(0x8000);
1319        hdr->len = cpu_to_le16(sizeof(*stats));
1320        hdr->type = cpu_to_le16(P54_CONTROL_TYPE_STAT_READBACK);
1321        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*stats));
1322
1323        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*stats), 0);
1324}
1325
1326static int p54_get_stats(struct ieee80211_hw *dev,
1327                         struct ieee80211_low_level_stats *stats)
1328{
1329        struct p54_common *priv = dev->priv;
1330
1331        del_timer(&priv->stats_timer);
1332        p54_statistics_timer((unsigned long)dev);
1333
1334        if (!wait_for_completion_interruptible_timeout(&priv->stats_comp, HZ)) {
1335                printk(KERN_ERR "%s: device does not respond!\n",
1336                        wiphy_name(dev->wiphy));
1337                return -EBUSY;
1338        }
1339
1340        memcpy(stats, &priv->stats, sizeof(*stats));
1341
1342        return 0;
1343}
1344
1345static int p54_get_tx_stats(struct ieee80211_hw *dev,
1346                            struct ieee80211_tx_queue_stats *stats)
1347{
1348        struct p54_common *priv = dev->priv;
1349
1350        memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
1351
1352        return 0;
1353}
1354
1355static const struct ieee80211_ops p54_ops = {
1356        .tx                     = p54_tx,
1357        .start                  = p54_start,
1358        .stop                   = p54_stop,
1359        .add_interface          = p54_add_interface,
1360        .remove_interface       = p54_remove_interface,
1361        .config                 = p54_config,
1362        .config_interface       = p54_config_interface,
1363        .configure_filter       = p54_configure_filter,
1364        .conf_tx                = p54_conf_tx,
1365        .get_stats              = p54_get_stats,
1366        .get_tx_stats           = p54_get_tx_stats
1367};
1368
1369struct ieee80211_hw *p54_init_common(size_t priv_data_len)
1370{
1371        struct ieee80211_hw *dev;
1372        struct p54_common *priv;
1373
1374        dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1375        if (!dev)
1376                return NULL;
1377
1378        priv = dev->priv;
1379        priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1380        skb_queue_head_init(&priv->tx_queue);
1381        dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
1382                     IEEE80211_HW_RX_INCLUDES_FCS |
1383                     IEEE80211_HW_SIGNAL_DBM |
1384                     IEEE80211_HW_NOISE_DBM;
1385
1386        dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1387
1388        dev->channel_change_time = 1000;        /* TODO: find actual value */
1389
1390        priv->tx_stats[0].limit = 1;
1391        priv->tx_stats[1].limit = 1;
1392        priv->tx_stats[2].limit = 1;
1393        priv->tx_stats[3].limit = 1;
1394        priv->tx_stats[4].limit = 5;
1395        dev->queues = 1;
1396        priv->noise = -94;
1397        dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
1398                                 sizeof(struct p54_tx_control_allocdata);
1399
1400        mutex_init(&priv->conf_mutex);
1401        init_completion(&priv->eeprom_comp);
1402        init_completion(&priv->stats_comp);
1403        setup_timer(&priv->stats_timer, p54_statistics_timer,
1404                (unsigned long)dev);
1405
1406        return dev;
1407}
1408EXPORT_SYMBOL_GPL(p54_init_common);
1409
1410void p54_free_common(struct ieee80211_hw *dev)
1411{
1412        struct p54_common *priv = dev->priv;
1413        kfree(priv->cached_stats);
1414        kfree(priv->iq_autocal);
1415        kfree(priv->output_limit);
1416        kfree(priv->curve_data);
1417        kfree(priv->cached_vdcf);
1418}
1419EXPORT_SYMBOL_GPL(p54_free_common);
1420
1421static int __init p54_init(void)
1422{
1423        return 0;
1424}
1425
1426static void __exit p54_exit(void)
1427{
1428}
1429
1430module_init(p54_init);
1431module_exit(p54_exit);
1432
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