drivers/net/wireless/p54/p54common.c

   1
   2 /*
   3  * Common code for mac80211 Prism54 drivers
   4  *
   5  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   6  * Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
   7  *
   8  * Based on the islsm (softmac prism54) driver, which is:
   9  * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/firmware.h>
  18 #include <linux/etherdevice.h>
  19
  20 #include <net/mac80211.h>
  21
  22 #include "p54.h"
  23 #include "p54common.h"
  24
  25 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  26 MODULE_DESCRIPTION("Softmac Prism54 common code");
  27 MODULE_LICENSE("GPL");
  28 MODULE_ALIAS("prism54common");
  29
  30 static struct ieee80211_rate p54_rates[] = {
  31         { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  32         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  33         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  34         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  35         { .bitrate = 60, .hw_value = 4, },
  36         { .bitrate = 90, .hw_value = 5, },
  37         { .bitrate = 120, .hw_value = 6, },
  38         { .bitrate = 180, .hw_value = 7, },
  39         { .bitrate = 240, .hw_value = 8, },
  40         { .bitrate = 360, .hw_value = 9, },
  41         { .bitrate = 480, .hw_value = 10, },
  42         { .bitrate = 540, .hw_value = 11, },
  43 };
  44
  45 static struct ieee80211_channel p54_channels[] = {
  46         { .center_freq = 2412, .hw_value = 1, },
  47         { .center_freq = 2417, .hw_value = 2, },
  48         { .center_freq = 2422, .hw_value = 3, },
  49         { .center_freq = 2427, .hw_value = 4, },
  50         { .center_freq = 2432, .hw_value = 5, },
  51         { .center_freq = 2437, .hw_value = 6, },
  52         { .center_freq = 2442, .hw_value = 7, },
  53         { .center_freq = 2447, .hw_value = 8, },
  54         { .center_freq = 2452, .hw_value = 9, },
  55         { .center_freq = 2457, .hw_value = 10, },
  56         { .center_freq = 2462, .hw_value = 11, },
  57         { .center_freq = 2467, .hw_value = 12, },
  58         { .center_freq = 2472, .hw_value = 13, },
  59         { .center_freq = 2484, .hw_value = 14, },
  60 };
  61
  62 static struct ieee80211_supported_band band_2GHz = {
  63         .channels = p54_channels,
  64         .n_channels = ARRAY_SIZE(p54_channels),
  65         .bitrates = p54_rates,
  66         .n_bitrates = ARRAY_SIZE(p54_rates),
  67 };
  68
  69
  70 void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
  71 {
  72         struct p54_common *priv = dev->priv;
  73         struct bootrec_exp_if *exp_if;
  74         struct bootrec *bootrec;
  75         u32 *data = (u32 *)fw->data;
  76         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
  77         u8 *fw_version = NULL;
  78         size_t len;
  79         int i;
  80
  81         if (priv->rx_start)
  82                 return;
  83
  84         while (data < end_data && *data)
  85                 data++;
  86
  87         while (data < end_data && !*data)
  88                 data++;
  89
  90         bootrec = (struct bootrec *) data;
  91
  92         while (bootrec->data <= end_data &&
  93                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
  94                 u32 code = le32_to_cpu(bootrec->code);
  95                 switch (code) {
  96                 case BR_CODE_COMPONENT_ID:
  97                         switch (be32_to_cpu(*(__be32 *)bootrec->data)) {
  98                         case FW_FMAC:
  99                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
 100                                 break;
 101                         case FW_LM20:
 102                                 printk(KERN_INFO "p54: LM20 firmware\n");
 103                                 break;
 104                         case FW_LM86:
 105                                 printk(KERN_INFO "p54: LM86 firmware\n");
 106                                 break;
 107                         case FW_LM87:
 108                                 printk(KERN_INFO "p54: LM87 firmware - not supported yet!\n");
 109                                 break;
 110                         default:
 111                                 printk(KERN_INFO "p54: unknown firmware\n");
 112                                 break;
 113                         }
 114                         break;
 115                 case BR_CODE_COMPONENT_VERSION:
 116                         /* 24 bytes should be enough for all firmwares */
 117                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
 118                                 fw_version = (unsigned char*)bootrec->data;
 119                         break;
 120                 case BR_CODE_DESCR:
 121                         priv->rx_start = le32_to_cpu(((__le32 *)bootrec->data)[1]);
 122                         /* FIXME add sanity checking */
 123                         priv->rx_end = le32_to_cpu(((__le32 *)bootrec->data)[2]) - 0x3500;
 124                         break;
 125                 case BR_CODE_EXPOSED_IF:
 126                         exp_if = (struct bootrec_exp_if *) bootrec->data;
 127                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
 128                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
 129                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
 130                         break;
 131                 case BR_CODE_DEPENDENT_IF:
 132                         break;
 133                 case BR_CODE_END_OF_BRA:
 134                 case LEGACY_BR_CODE_END_OF_BRA:
 135                         end_data = NULL;
 136                         break;
 137                 default:
 138                         break;
 139                 }
 140                 bootrec = (struct bootrec *)&bootrec->data[len];
 141         }
 142
 143         if (fw_version)
 144                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
 145                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
 146
 147         if (priv->fw_var >= 0x300) {
 148                 /* Firmware supports QoS, use it! */
 149                 priv->tx_stats[0].limit = 3;
 150                 priv->tx_stats[1].limit = 4;
 151                 priv->tx_stats[2].limit = 3;
 152                 priv->tx_stats[3].limit = 1;
 153                 dev->queues = 4;
 154         }
 155 }
 156 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 157
 158 static int p54_convert_rev0_to_rev1(struct ieee80211_hw *dev,
 159                                     struct pda_pa_curve_data *curve_data)
 160 {
 161         struct p54_common *priv = dev->priv;
 162         struct pda_pa_curve_data_sample_rev1 *rev1;
 163         struct pda_pa_curve_data_sample_rev0 *rev0;
 164         size_t cd_len = sizeof(*curve_data) +
 165                 (curve_data->points_per_channel*sizeof(*rev1) + 2) *
 166                  curve_data->channels;
 167         unsigned int i, j;
 168         void *source, *target;
 169
 170         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 171         if (!priv->curve_data)
 172                 return -ENOMEM;
 173
 174         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 175         source = curve_data->data;
 176         target = priv->curve_data->data;
 177         for (i = 0; i < curve_data->channels; i++) {
 178                 __le16 *freq = source;
 179                 source += sizeof(__le16);
 180                 *((__le16 *)target) = *freq;
 181                 target += sizeof(__le16);
 182                 for (j = 0; j < curve_data->points_per_channel; j++) {
 183                         rev1 = target;
 184                         rev0 = source;
 185
 186                         rev1->rf_power = rev0->rf_power;
 187                         rev1->pa_detector = rev0->pa_detector;
 188                         rev1->data_64qam = rev0->pcv;
 189                         /* "invent" the points for the other modulations */
 190 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 191                         rev1->data_16qam = SUB(rev0->pcv, 12);
 192                         rev1->data_qpsk  = SUB(rev1->data_16qam, 12);
 193                         rev1->data_bpsk  = SUB(rev1->data_qpsk, 12);
 194                         rev1->data_barker= SUB(rev1->data_bpsk, 14);
 195 #undef SUB
 196                         target += sizeof(*rev1);
 197                         source += sizeof(*rev0);
 198                 }
 199         }
 200
 201         return 0;
 202 }
 203
 204 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 205 {
 206         struct p54_common *priv = dev->priv;
 207         struct eeprom_pda_wrap *wrap = NULL;
 208         struct pda_entry *entry;
 209         unsigned int data_len, entry_len;
 210         void *tmp;
 211         int err;
 212         u8 *end = (u8 *)eeprom + len;
 213
 214         wrap = (struct eeprom_pda_wrap *) eeprom;
 215         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 216
 217         /* verify that at least the entry length/code fits */
 218         while ((u8 *)entry <= end - sizeof(*entry)) {
 219                 entry_len = le16_to_cpu(entry->len);
 220                 data_len = ((entry_len - 1) << 1);
 221
 222                 /* abort if entry exceeds whole structure */
 223                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 224                         break;
 225
 226                 switch (le16_to_cpu(entry->code)) {
 227                 case PDR_MAC_ADDRESS:
 228                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 229                         break;
 230                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 231                         if (data_len < 2) {
 232                                 err = -EINVAL;
 233                                 goto err;
 234                         }
 235
 236                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 237                                 err = -EINVAL;
 238                                 goto err;
 239                         }
 240
 241                         priv->output_limit = kmalloc(entry->data[1] *
 242                                 sizeof(*priv->output_limit), GFP_KERNEL);
 243
 244                         if (!priv->output_limit) {
 245                                 err = -ENOMEM;
 246                                 goto err;
 247                         }
 248
 249                         memcpy(priv->output_limit, &entry->data[2],
 250                                entry->data[1]*sizeof(*priv->output_limit));
 251                         priv->output_limit_len = entry->data[1];
 252                         break;
 253                 case PDR_PRISM_PA_CAL_CURVE_DATA:
 254                         if (data_len < sizeof(struct pda_pa_curve_data)) {
 255                                 err = -EINVAL;
 256                                 goto err;
 257                         }
 258
 259                         if (((struct pda_pa_curve_data *)entry->data)->cal_method_rev) {
 260                                 priv->curve_data = kmalloc(data_len, GFP_KERNEL);
 261                                 if (!priv->curve_data) {
 262                                         err = -ENOMEM;
 263                                         goto err;
 264                                 }
 265
 266                                 memcpy(priv->curve_data, entry->data, data_len);
 267                         } else {
 268                                 err = p54_convert_rev0_to_rev1(dev, (struct pda_pa_curve_data *)entry->data);
 269                                 if (err)
 270                                         goto err;
 271                         }
 272
 273                         break;
 274                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 275                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 276                         if (!priv->iq_autocal) {
 277                                 err = -ENOMEM;
 278                                 goto err;
 279                         }
 280
 281                         memcpy(priv->iq_autocal, entry->data, data_len);
 282                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 283                         break;
 284                 case PDR_INTERFACE_LIST:
 285                         tmp = entry->data;
 286                         while ((u8 *)tmp < entry->data + data_len) {
 287                                 struct bootrec_exp_if *exp_if = tmp;
 288                                 if (le16_to_cpu(exp_if->if_id) == 0xF)
 289                                         priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
 290                                 tmp += sizeof(struct bootrec_exp_if);
 291                         }
 292                         break;
 293                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 294                         priv->version = *(u8 *)(entry->data + 1);
 295                         break;
 296                 case PDR_END:
 297                         /* make it overrun */
 298                         entry_len = len;
 299                         break;
 300                 default:
 301                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
 302                                 le16_to_cpu(entry->code));
 303                         break;
 304                 }
 305
 306                 entry = (void *)entry + (entry_len + 1)*2;
 307         }
 308
 309         if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
 310                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 311                 err = -EINVAL;
 312                 goto err;
 313         }
 314
 315         return 0;
 316
 317   err:
 318         if (priv->iq_autocal) {
 319                 kfree(priv->iq_autocal);
 320                 priv->iq_autocal = NULL;
 321         }
 322
 323         if (priv->output_limit) {
 324                 kfree(priv->output_limit);
 325                 priv->output_limit = NULL;
 326         }
 327
 328         if (priv->curve_data) {
 329                 kfree(priv->curve_data);
 330                 priv->curve_data = NULL;
 331         }
 332
 333         printk(KERN_ERR "p54: eeprom parse failed!\n");
 334         return err;
 335 }
 336 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 337
 338 void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
 339 {
 340         struct p54_eeprom_lm86 *eeprom_hdr;
 341
 342         hdr->magic1 = cpu_to_le16(0x8000);
 343         hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
 344         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
 345         hdr->retry1 = hdr->retry2 = 0;
 346         eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
 347         eeprom_hdr->offset = 0x0;
 348         eeprom_hdr->len = cpu_to_le16(0x2000);
 349 }
 350 EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
 351
 352 static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 353 {
 354         struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
 355         struct ieee80211_rx_status rx_status = {0};
 356         u16 freq = le16_to_cpu(hdr->freq);
 357
 358         rx_status.signal = hdr->rssi;
 359         /* XX correct? */
 360         rx_status.qual = (100 * hdr->rssi) / 127;
 361         rx_status.rate_idx = hdr->rate & 0xf;
 362         rx_status.freq = freq;
 363         rx_status.band = IEEE80211_BAND_2GHZ;
 364         rx_status.antenna = hdr->antenna;
 365         rx_status.mactime = le64_to_cpu(hdr->timestamp);
 366         rx_status.flag |= RX_FLAG_TSFT;
 367
 368         skb_pull(skb, sizeof(*hdr));
 369         skb_trim(skb, le16_to_cpu(hdr->len));
 370
 371         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 372 }
 373
 374 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 375 {
 376         struct p54_common *priv = dev->priv;
 377         int i;
 378
 379         for (i = 0; i < dev->queues; i++)
 380                 if (priv->tx_stats[i].len < priv->tx_stats[i].limit)
 381                         ieee80211_wake_queue(dev, i);
 382 }
 383
 384 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 385 {
 386         struct p54_common *priv = dev->priv;
 387         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 388         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
 389         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 390         u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
 391         struct memrecord *range = NULL;
 392         u32 freed = 0;
 393         u32 last_addr = priv->rx_start;
 394
 395         while (entry != (struct sk_buff *)&priv->tx_queue) {
 396                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 397                 range = (void *)info->driver_data;
 398                 if (range->start_addr == addr) {
 399                         struct p54_control_hdr *entry_hdr;
 400                         struct p54_tx_control_allocdata *entry_data;
 401                         int pad = 0;
 402
 403                         if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 404                                 struct ieee80211_tx_info *ni;
 405                                 struct memrecord *mr;
 406
 407                                 ni = IEEE80211_SKB_CB(entry->next);
 408                                 mr = (struct memrecord *)ni->driver_data;
 409                                 freed = mr->start_addr - last_addr;
 410                         } else
 411                                 freed = priv->rx_end - last_addr;
 412
 413                         last_addr = range->end_addr;
 414                         __skb_unlink(entry, &priv->tx_queue);
 415                         memset(&info->status, 0, sizeof(info->status));
 416                         priv->tx_stats[skb_get_queue_mapping(skb)].len--;
 417                         entry_hdr = (struct p54_control_hdr *) entry->data;
 418                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
 419                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
 420                                 pad = entry_data->align[0];
 421
 422                         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 423                                 if (!(payload->status & 0x01))
 424                                         info->flags |= IEEE80211_TX_STAT_ACK;
 425                                 else
 426                                         info->status.excessive_retries = 1;
 427                         }
 428                         info->status.retry_count = payload->retries - 1;
 429                         info->status.ack_signal = le16_to_cpu(payload->ack_rssi);
 430                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 431                         ieee80211_tx_status_irqsafe(dev, entry);
 432                         break;
 433                 } else
 434                         last_addr = range->end_addr;
 435                 entry = entry->next;
 436         }
 437
 438         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 439             sizeof(struct p54_control_hdr))
 440                 p54_wake_free_queues(dev);
 441 }
 442
 443 static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 444 {
 445         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 446
 447         switch (le16_to_cpu(hdr->type)) {
 448         case P54_CONTROL_TYPE_TXDONE:
 449                 p54_rx_frame_sent(dev, skb);
 450                 break;
 451         case P54_CONTROL_TYPE_BBP:
 452                 break;
 453         default:
 454                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 455                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 456                 break;
 457         }
 458 }
 459
 460 /* returns zero if skb can be reused */
 461 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 462 {
 463         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
 464         switch (type) {
 465         case 0x00:
 466         case 0x01:
 467                 p54_rx_data(dev, skb);
 468                 return -1;
 469         case 0x4d:
 470                 /* TODO: do something better... but then again, I've never seen this happen */
 471                 printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
 472                        wiphy_name(dev->wiphy));
 473                 break;
 474         case 0x80:
 475                 p54_rx_control(dev, skb);
 476                 break;
 477         default:
 478                 printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
 479                        wiphy_name(dev->wiphy), type);
 480                 break;
 481         }
 482         return 0;
 483 }
 484 EXPORT_SYMBOL_GPL(p54_rx);
 485
 486 /*
 487  * So, the firmware is somewhat stupid and doesn't know what places in its
 488  * memory incoming data should go to. By poking around in the firmware, we
 489  * can find some unused memory to upload our packets to. However, data that we
 490  * want the card to TX needs to stay intact until the card has told us that
 491  * it is done with it. This function finds empty places we can upload to and
 492  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 493  * allocated areas.
 494  */
 495 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 496                                struct p54_control_hdr *data, u32 len)
 497 {
 498         struct p54_common *priv = dev->priv;
 499         struct sk_buff *entry = priv->tx_queue.next;
 500         struct sk_buff *target_skb = NULL;
 501         u32 last_addr = priv->rx_start;
 502         u32 largest_hole = 0;
 503         u32 target_addr = priv->rx_start;
 504         unsigned long flags;
 505         unsigned int left;
 506         len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
 507
 508         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 509         left = skb_queue_len(&priv->tx_queue);
 510         while (left--) {
 511                 u32 hole_size;
 512                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 513                 struct memrecord *range = (void *)info->driver_data;
 514                 hole_size = range->start_addr - last_addr;
 515                 if (!target_skb && hole_size >= len) {
 516                         target_skb = entry->prev;
 517                         hole_size -= len;
 518                         target_addr = last_addr;
 519                 }
 520                 largest_hole = max(largest_hole, hole_size);
 521                 last_addr = range->end_addr;
 522                 entry = entry->next;
 523         }
 524         if (!target_skb && priv->rx_end - last_addr >= len) {
 525                 target_skb = priv->tx_queue.prev;
 526                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 527                 if (!skb_queue_empty(&priv->tx_queue)) {
 528                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(target_skb);
 529                         struct memrecord *range = (void *)info->driver_data;
 530                         target_addr = range->end_addr;
 531                 }
 532         } else
 533                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 534
 535         if (skb) {
 536                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 537                 struct memrecord *range = (void *)info->driver_data;
 538                 range->start_addr = target_addr;
 539                 range->end_addr = target_addr + len;
 540                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
 541                 if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 542                                    sizeof(struct p54_control_hdr))
 543                         ieee80211_stop_queues(dev);
 544         }
 545         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 546
 547         data->req_id = cpu_to_le32(target_addr + 0x70);
 548 }
 549
 550 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 551 {
 552         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 553         struct ieee80211_tx_queue_stats *current_queue;
 554         struct p54_common *priv = dev->priv;
 555         struct p54_control_hdr *hdr;
 556         struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
 557         struct p54_tx_control_allocdata *txhdr;
 558         size_t padding, len;
 559         u8 rate;
 560
 561         current_queue = &priv->tx_stats[skb_get_queue_mapping(skb)];
 562         if (unlikely(current_queue->len > current_queue->limit))
 563                 return NETDEV_TX_BUSY;
 564         current_queue->len++;
 565         current_queue->count++;
 566         if (current_queue->len == current_queue->limit)
 567                 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
 568
 569         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 570         len = skb->len;
 571
 572         txhdr = (struct p54_tx_control_allocdata *)
 573                         skb_push(skb, sizeof(*txhdr) + padding);
 574         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
 575
 576         if (padding)
 577                 hdr->magic1 = cpu_to_le16(0x4010);
 578         else
 579                 hdr->magic1 = cpu_to_le16(0x0010);
 580         hdr->len = cpu_to_le16(len);
 581         hdr->type = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 0 : cpu_to_le16(1);
 582         hdr->retry1 = hdr->retry2 = info->control.retry_limit;
 583
 584         memset(txhdr->wep_key, 0x0, 16);
 585         txhdr->padding = 0;
 586         txhdr->padding2 = 0;
 587
 588         /* TODO: add support for alternate retry TX rates */
 589         rate = ieee80211_get_tx_rate(dev, info)->hw_value;
 590         if (info->flags & IEEE80211_TX_CTL_SHORT_PREAMBLE)
 591                 rate |= 0x10;
 592         if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
 593                 rate |= 0x40;
 594         else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)
 595                 rate |= 0x20;
 596         memset(txhdr->rateset, rate, 8);
 597         txhdr->wep_key_present = 0;
 598         txhdr->wep_key_len = 0;
 599         txhdr->frame_type = cpu_to_le32(skb_get_queue_mapping(skb) + 4);
 600         txhdr->magic4 = 0;
 601         txhdr->antenna = (info->antenna_sel_tx == 0) ?
 602                 2 : info->antenna_sel_tx - 1;
 603         txhdr->output_power = 0x7f; // HW Maximum
 604         txhdr->magic5 = (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
 605                 0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
 606         if (padding)
 607                 txhdr->align[0] = padding;
 608
 609         /* FIXME: The sequence that follows is needed for this driver to
 610          * work with mac80211 since "mac80211: fix TX sequence numbers".
 611          * As with the temporary code in rt2x00, changes will be needed
 612          * to get proper sequence numbers on beacons. In addition, this
 613          * patch places the sequence number in the hardware state, which
 614          * limits us to a single virtual state.
 615          */
 616         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 617                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 618                         priv->seqno += 0x10;
 619                 ieee80211hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 620                 ieee80211hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
 621         }
 622         /* modifies skb->cb and with it info, so must be last! */
 623         p54_assign_address(dev, skb, hdr, skb->len);
 624
 625         priv->tx(dev, hdr, skb->len, 0);
 626         return 0;
 627 }
 628
 629 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
 630                           const u8 *dst, const u8 *src, u8 antenna,
 631                           u32 magic3, u32 magic8, u32 magic9)
 632 {
 633         struct p54_common *priv = dev->priv;
 634         struct p54_control_hdr *hdr;
 635         struct p54_tx_control_filter *filter;
 636
 637         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
 638                       priv->tx_hdr_len, GFP_ATOMIC);
 639         if (!hdr)
 640                 return -ENOMEM;
 641
 642         hdr = (void *)hdr + priv->tx_hdr_len;
 643
 644         filter = (struct p54_tx_control_filter *) hdr->data;
 645         hdr->magic1 = cpu_to_le16(0x8001);
 646         hdr->len = cpu_to_le16(sizeof(*filter));
 647         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter));
 648         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
 649
 650         filter->filter_type = cpu_to_le16(filter_type);
 651         memcpy(filter->dst, dst, ETH_ALEN);
 652         if (!src)
 653                 memset(filter->src, ~0, ETH_ALEN);
 654         else
 655                 memcpy(filter->src, src, ETH_ALEN);
 656         filter->antenna = antenna;
 657         filter->magic3 = cpu_to_le32(magic3);
 658         filter->rx_addr = cpu_to_le32(priv->rx_end);
 659         filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
 660         filter->rxhw = priv->rxhw;
 661         filter->magic8 = cpu_to_le16(magic8);
 662         filter->magic9 = cpu_to_le16(magic9);
 663
 664         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
 665         return 0;
 666 }
 667
 668 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
 669 {
 670         struct p54_common *priv = dev->priv;
 671         struct p54_control_hdr *hdr;
 672         struct p54_tx_control_channel *chan;
 673         unsigned int i;
 674         size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
 675                              sizeof(*chan->curve_data) *
 676                              priv->curve_data->points_per_channel;
 677         void *entry;
 678
 679         hdr = kzalloc(sizeof(*hdr) + payload_len +
 680                       priv->tx_hdr_len, GFP_KERNEL);
 681         if (!hdr)
 682                 return -ENOMEM;
 683
 684         hdr = (void *)hdr + priv->tx_hdr_len;
 685
 686         chan = (struct p54_tx_control_channel *) hdr->data;
 687
 688         hdr->magic1 = cpu_to_le16(0x8001);
 689         hdr->len = cpu_to_le16(sizeof(*chan));
 690         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
 691         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len);
 692
 693         chan->magic1 = cpu_to_le16(0x1);
 694         chan->magic2 = cpu_to_le16(0x0);
 695
 696         for (i = 0; i < priv->iq_autocal_len; i++) {
 697                 if (priv->iq_autocal[i].freq != freq)
 698                         continue;
 699
 700                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
 701                        sizeof(*priv->iq_autocal));
 702                 break;
 703         }
 704         if (i == priv->iq_autocal_len)
 705                 goto err;
 706
 707         for (i = 0; i < priv->output_limit_len; i++) {
 708                 if (priv->output_limit[i].freq != freq)
 709                         continue;
 710
 711                 chan->val_barker = 0x38;
 712                 chan->val_bpsk = priv->output_limit[i].val_bpsk;
 713                 chan->val_qpsk = priv->output_limit[i].val_qpsk;
 714                 chan->val_16qam = priv->output_limit[i].val_16qam;
 715                 chan->val_64qam = priv->output_limit[i].val_64qam;
 716                 break;
 717         }
 718         if (i == priv->output_limit_len)
 719                 goto err;
 720
 721         chan->pa_points_per_curve = priv->curve_data->points_per_channel;
 722
 723         entry = priv->curve_data->data;
 724         for (i = 0; i < priv->curve_data->channels; i++) {
 725                 if (*((__le16 *)entry) != freq) {
 726                         entry += sizeof(__le16);
 727                         entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
 728                                  chan->pa_points_per_curve;
 729                         continue;
 730                 }
 731
 732                 entry += sizeof(__le16);
 733                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
 734                        chan->pa_points_per_curve);
 735                 break;
 736         }
 737
 738         memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
 739
 740         priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
 741         return 0;
 742
 743  err:
 744         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
 745         kfree(hdr);
 746         return -EINVAL;
 747 }
 748
 749 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
 750 {
 751         struct p54_common *priv = dev->priv;
 752         struct p54_control_hdr *hdr;
 753         struct p54_tx_control_led *led;
 754
 755         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
 756                       priv->tx_hdr_len, GFP_KERNEL);
 757         if (!hdr)
 758                 return -ENOMEM;
 759
 760         hdr = (void *)hdr + priv->tx_hdr_len;
 761         hdr->magic1 = cpu_to_le16(0x8001);
 762         hdr->len = cpu_to_le16(sizeof(*led));
 763         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
 764         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led));
 765
 766         led = (struct p54_tx_control_led *) hdr->data;
 767         led->mode = cpu_to_le16(mode);
 768         led->led_permanent = cpu_to_le16(link);
 769         led->led_temporary = cpu_to_le16(act);
 770         led->duration = cpu_to_le16(1000);
 771
 772         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
 773
 774         return 0;
 775 }
 776
 777 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
 778 do {                                                            \
 779         queue.aifs = cpu_to_le16(ai_fs);                        \
 780         queue.cwmin = cpu_to_le16(cw_min);                      \
 781         queue.cwmax = cpu_to_le16(cw_max);                      \
 782         queue.txop = cpu_to_le16(_txop);                        \
 783 } while(0)
 784
 785 static void p54_init_vdcf(struct ieee80211_hw *dev)
 786 {
 787         struct p54_common *priv = dev->priv;
 788         struct p54_control_hdr *hdr;
 789         struct p54_tx_control_vdcf *vdcf;
 790
 791         /* all USB V1 adapters need a extra headroom */
 792         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 793         hdr->magic1 = cpu_to_le16(0x8001);
 794         hdr->len = cpu_to_le16(sizeof(*vdcf));
 795         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
 796         hdr->req_id = cpu_to_le32(priv->rx_start);
 797
 798         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 799
 800         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 47);
 801         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 94);
 802         P54_SET_QUEUE(vdcf->queue[2], 0x0003, 0x000f, 0x03ff, 0);
 803         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0);
 804 }
 805
 806 static void p54_set_vdcf(struct ieee80211_hw *dev)
 807 {
 808         struct p54_common *priv = dev->priv;
 809         struct p54_control_hdr *hdr;
 810         struct p54_tx_control_vdcf *vdcf;
 811
 812         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 813
 814         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf));
 815
 816         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 817
 818         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
 819                 vdcf->slottime = 9;
 820                 vdcf->magic1 = 0x10;
 821                 vdcf->magic2 = 0x00;
 822         } else {
 823                 vdcf->slottime = 20;
 824                 vdcf->magic1 = 0x0a;
 825                 vdcf->magic2 = 0x06;
 826         }
 827
 828         /* (see prism54/isl_oid.h for further details) */
 829         vdcf->frameburst = cpu_to_le16(0);
 830
 831         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
 832 }
 833
 834 static int p54_start(struct ieee80211_hw *dev)
 835 {
 836         struct p54_common *priv = dev->priv;
 837         int err;
 838
 839         err = priv->open(dev);
 840         if (!err)
 841                 priv->mode = IEEE80211_IF_TYPE_MNTR;
 842
 843         return err;
 844 }
 845
 846 static void p54_stop(struct ieee80211_hw *dev)
 847 {
 848         struct p54_common *priv = dev->priv;
 849         struct sk_buff *skb;
 850         while ((skb = skb_dequeue(&priv->tx_queue)))
 851                 kfree_skb(skb);
 852         priv->stop(dev);
 853         priv->mode = IEEE80211_IF_TYPE_INVALID;
 854 }
 855
 856 static int p54_add_interface(struct ieee80211_hw *dev,
 857                              struct ieee80211_if_init_conf *conf)
 858 {
 859         struct p54_common *priv = dev->priv;
 860
 861         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
 862                 return -EOPNOTSUPP;
 863
 864         switch (conf->type) {
 865         case IEEE80211_IF_TYPE_STA:
 866                 priv->mode = conf->type;
 867                 break;
 868         default:
 869                 return -EOPNOTSUPP;
 870         }
 871
 872         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
 873
 874         p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
 875         p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
 876
 877         switch (conf->type) {
 878         case IEEE80211_IF_TYPE_STA:
 879                 p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
 880                 break;
 881         default:
 882                 BUG();  /* impossible */
 883                 break;
 884         }
 885
 886         p54_set_leds(dev, 1, 0, 0);
 887
 888         return 0;
 889 }
 890
 891 static void p54_remove_interface(struct ieee80211_hw *dev,
 892                                  struct ieee80211_if_init_conf *conf)
 893 {
 894         struct p54_common *priv = dev->priv;
 895         priv->mode = IEEE80211_IF_TYPE_MNTR;
 896         memset(priv->mac_addr, 0, ETH_ALEN);
 897         p54_set_filter(dev, 0, priv->mac_addr, NULL, 2, 0, 0, 0);
 898 }
 899
 900 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
 901 {
 902         int ret;
 903         struct p54_common *priv = dev->priv;
 904
 905         mutex_lock(&priv->conf_mutex);
 906         ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
 907         p54_set_vdcf(dev);
 908         mutex_unlock(&priv->conf_mutex);
 909         return ret;
 910 }
 911
 912 static int p54_config_interface(struct ieee80211_hw *dev,
 913                                 struct ieee80211_vif *vif,
 914                                 struct ieee80211_if_conf *conf)
 915 {
 916         struct p54_common *priv = dev->priv;
 917
 918         mutex_lock(&priv->conf_mutex);
 919         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
 920         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
 921         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
 922         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
 923         mutex_unlock(&priv->conf_mutex);
 924         return 0;
 925 }
 926
 927 static void p54_configure_filter(struct ieee80211_hw *dev,
 928                                  unsigned int changed_flags,
 929                                  unsigned int *total_flags,
 930                                  int mc_count, struct dev_mc_list *mclist)
 931 {
 932         struct p54_common *priv = dev->priv;
 933
 934         *total_flags &= FIF_BCN_PRBRESP_PROMISC;
 935
 936         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
 937                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
 938                         p54_set_filter(dev, 0, priv->mac_addr,
 939                                        NULL, 2, 0, 0, 0);
 940                 else
 941                         p54_set_filter(dev, 0, priv->mac_addr,
 942                                        priv->bssid, 2, 0, 0, 0);
 943         }
 944 }
 945
 946 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
 947                        const struct ieee80211_tx_queue_params *params)
 948 {
 949         struct p54_common *priv = dev->priv;
 950         struct p54_tx_control_vdcf *vdcf;
 951
 952         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
 953                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
 954
 955         if ((params) && !(queue > 4)) {
 956                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
 957                         params->cw_min, params->cw_max, params->txop);
 958         } else
 959                 return -EINVAL;
 960
 961         p54_set_vdcf(dev);
 962
 963         return 0;
 964 }
 965
 966 static int p54_get_stats(struct ieee80211_hw *dev,
 967                          struct ieee80211_low_level_stats *stats)
 968 {
 969         /* TODO */
 970         return 0;
 971 }
 972
 973 static int p54_get_tx_stats(struct ieee80211_hw *dev,
 974                             struct ieee80211_tx_queue_stats *stats)
 975 {
 976         struct p54_common *priv = dev->priv;
 977
 978         memcpy(stats, &priv->tx_stats, sizeof(stats[0]) * dev->queues);
 979
 980         return 0;
 981 }
 982
 983 static const struct ieee80211_ops p54_ops = {
 984         .tx                     = p54_tx,
 985         .start                  = p54_start,
 986         .stop                   = p54_stop,
 987         .add_interface          = p54_add_interface,
 988         .remove_interface       = p54_remove_interface,
 989         .config                 = p54_config,
 990         .config_interface       = p54_config_interface,
 991         .configure_filter       = p54_configure_filter,
 992         .conf_tx                = p54_conf_tx,
 993         .get_stats              = p54_get_stats,
 994         .get_tx_stats           = p54_get_tx_stats
 995 };
 996
 997 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 998 {
 999         struct ieee80211_hw *dev;
1000         struct p54_common *priv;
1001
1002         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1003         if (!dev)
1004                 return NULL;
1005
1006         priv = dev->priv;
1007         priv->mode = IEEE80211_IF_TYPE_INVALID;
1008         skb_queue_head_init(&priv->tx_queue);
1009         dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
1010         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
1011                      IEEE80211_HW_RX_INCLUDES_FCS |
1012                      IEEE80211_HW_SIGNAL_UNSPEC;
1013         dev->channel_change_time = 1000;        /* TODO: find actual value */
1014         dev->max_signal = 127;
1015
1016         priv->tx_stats[0].limit = 5;
1017         dev->queues = 1;
1018
1019         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
1020                                  sizeof(struct p54_tx_control_allocdata);
1021
1022         priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
1023               priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
1024
1025         if (!priv->cached_vdcf) {
1026                 ieee80211_free_hw(dev);
1027                 return NULL;
1028         }
1029
1030         p54_init_vdcf(dev);
1031         mutex_init(&priv->conf_mutex);
1032
1033         return dev;
1034 }
1035 EXPORT_SYMBOL_GPL(p54_init_common);
1036
1037 void p54_free_common(struct ieee80211_hw *dev)
1038 {
1039         struct p54_common *priv = dev->priv;
1040         kfree(priv->iq_autocal);
1041         kfree(priv->output_limit);
1042         kfree(priv->curve_data);
1043         kfree(priv->cached_vdcf);
1044 }
1045 EXPORT_SYMBOL_GPL(p54_free_common);
1046
1047 static int __init p54_init(void)
1048 {
1049         return 0;
1050 }
1051
1052 static void __exit p54_exit(void)
1053 {
1054 }
1055
1056 module_init(p54_init);
1057 module_exit(p54_exit);