drivers/net/wireless/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 void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
  31 {
  32         struct p54_common *priv = dev->priv;
  33         struct bootrec_exp_if *exp_if;
  34         struct bootrec *bootrec;
  35         u32 *data = (u32 *)fw->data;
  36         u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
  37         u8 *fw_version = NULL;
  38         size_t len;
  39         int i;
  40
  41         if (priv->rx_start)
  42                 return;
  43
  44         while (data < end_data && *data)
  45                 data++;
  46
  47         while (data < end_data && !*data)
  48                 data++;
  49
  50         bootrec = (struct bootrec *) data;
  51
  52         while (bootrec->data <= end_data &&
  53                (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
  54                 u32 code = le32_to_cpu(bootrec->code);
  55                 switch (code) {
  56                 case BR_CODE_COMPONENT_ID:
  57                         switch (be32_to_cpu(*(__be32 *)bootrec->data)) {
  58                         case FW_FMAC:
  59                                 printk(KERN_INFO "p54: FreeMAC firmware\n");
  60                                 break;
  61                         case FW_LM20:
  62                                 printk(KERN_INFO "p54: LM20 firmware\n");
  63                                 break;
  64                         case FW_LM86:
  65                                 printk(KERN_INFO "p54: LM86 firmware\n");
  66                                 break;
  67                         case FW_LM87:
  68                                 printk(KERN_INFO "p54: LM87 firmware - not supported yet!\n");
  69                                 break;
  70                         default:
  71                                 printk(KERN_INFO "p54: unknown firmware\n");
  72                                 break;
  73                         }
  74                         break;
  75                 case BR_CODE_COMPONENT_VERSION:
  76                         /* 24 bytes should be enough for all firmwares */
  77                         if (strnlen((unsigned char*)bootrec->data, 24) < 24)
  78                                 fw_version = (unsigned char*)bootrec->data;
  79                         break;
  80                 case BR_CODE_DESCR:
  81                         priv->rx_start = le32_to_cpu(((__le32 *)bootrec->data)[1]);
  82                         /* FIXME add sanity checking */
  83                         priv->rx_end = le32_to_cpu(((__le32 *)bootrec->data)[2]) - 0x3500;
  84                         break;
  85                 case BR_CODE_EXPOSED_IF:
  86                         exp_if = (struct bootrec_exp_if *) bootrec->data;
  87                         for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
  88                                 if (exp_if[i].if_id == cpu_to_le16(0x1a))
  89                                         priv->fw_var = le16_to_cpu(exp_if[i].variant);
  90                         break;
  91                 case BR_CODE_DEPENDENT_IF:
  92                         break;
  93                 case BR_CODE_END_OF_BRA:
  94                 case LEGACY_BR_CODE_END_OF_BRA:
  95                         end_data = NULL;
  96                         break;
  97                 default:
  98                         break;
  99                 }
 100                 bootrec = (struct bootrec *)&bootrec->data[len];
 101         }
 102
 103         if (fw_version)
 104                 printk(KERN_INFO "p54: FW rev %s - Softmac protocol %x.%x\n",
 105                         fw_version, priv->fw_var >> 8, priv->fw_var & 0xff);
 106
 107         if (priv->fw_var >= 0x300) {
 108                 /* Firmware supports QoS, use it! */
 109                 priv->tx_stats.data[0].limit = 3;
 110                 priv->tx_stats.data[1].limit = 4;
 111                 priv->tx_stats.data[2].limit = 3;
 112                 priv->tx_stats.data[3].limit = 1;
 113                 dev->queues = 4;
 114         }
 115 }
 116 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 117
 118 static int p54_convert_rev0_to_rev1(struct ieee80211_hw *dev,
 119                                     struct pda_pa_curve_data *curve_data)
 120 {
 121         struct p54_common *priv = dev->priv;
 122         struct pda_pa_curve_data_sample_rev1 *rev1;
 123         struct pda_pa_curve_data_sample_rev0 *rev0;
 124         size_t cd_len = sizeof(*curve_data) +
 125                 (curve_data->points_per_channel*sizeof(*rev1) + 2) *
 126                  curve_data->channels;
 127         unsigned int i, j;
 128         void *source, *target;
 129
 130         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 131         if (!priv->curve_data)
 132                 return -ENOMEM;
 133
 134         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 135         source = curve_data->data;
 136         target = priv->curve_data->data;
 137         for (i = 0; i < curve_data->channels; i++) {
 138                 __le16 *freq = source;
 139                 source += sizeof(__le16);
 140                 *((__le16 *)target) = *freq;
 141                 target += sizeof(__le16);
 142                 for (j = 0; j < curve_data->points_per_channel; j++) {
 143                         rev1 = target;
 144                         rev0 = source;
 145
 146                         rev1->rf_power = rev0->rf_power;
 147                         rev1->pa_detector = rev0->pa_detector;
 148                         rev1->data_64qam = rev0->pcv;
 149                         /* "invent" the points for the other modulations */
 150 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 151                         rev1->data_16qam = SUB(rev0->pcv, 12);
 152                         rev1->data_qpsk  = SUB(rev1->data_16qam, 12);
 153                         rev1->data_bpsk  = SUB(rev1->data_qpsk, 12);
 154                         rev1->data_barker= SUB(rev1->data_bpsk, 14);
 155 #undef SUB
 156                         target += sizeof(*rev1);
 157                         source += sizeof(*rev0);
 158                 }
 159         }
 160
 161         return 0;
 162 }
 163
 164 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 165 {
 166         struct p54_common *priv = dev->priv;
 167         struct eeprom_pda_wrap *wrap = NULL;
 168         struct pda_entry *entry;
 169         unsigned int data_len, entry_len;
 170         void *tmp;
 171         int err;
 172         u8 *end = (u8 *)eeprom + len;
 173
 174         wrap = (struct eeprom_pda_wrap *) eeprom;
 175         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 176
 177         /* verify that at least the entry length/code fits */
 178         while ((u8 *)entry <= end - sizeof(*entry)) {
 179                 entry_len = le16_to_cpu(entry->len);
 180                 data_len = ((entry_len - 1) << 1);
 181
 182                 /* abort if entry exceeds whole structure */
 183                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 184                         break;
 185
 186                 switch (le16_to_cpu(entry->code)) {
 187                 case PDR_MAC_ADDRESS:
 188                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 189                         break;
 190                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 191                         if (data_len < 2) {
 192                                 err = -EINVAL;
 193                                 goto err;
 194                         }
 195
 196                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 197                                 err = -EINVAL;
 198                                 goto err;
 199                         }
 200
 201                         priv->output_limit = kmalloc(entry->data[1] *
 202                                 sizeof(*priv->output_limit), GFP_KERNEL);
 203
 204                         if (!priv->output_limit) {
 205                                 err = -ENOMEM;
 206                                 goto err;
 207                         }
 208
 209                         memcpy(priv->output_limit, &entry->data[2],
 210                                entry->data[1]*sizeof(*priv->output_limit));
 211                         priv->output_limit_len = entry->data[1];
 212                         break;
 213                 case PDR_PRISM_PA_CAL_CURVE_DATA:
 214                         if (data_len < sizeof(struct pda_pa_curve_data)) {
 215                                 err = -EINVAL;
 216                                 goto err;
 217                         }
 218
 219                         if (((struct pda_pa_curve_data *)entry->data)->cal_method_rev) {
 220                                 priv->curve_data = kmalloc(data_len, GFP_KERNEL);
 221                                 if (!priv->curve_data) {
 222                                         err = -ENOMEM;
 223                                         goto err;
 224                                 }
 225
 226                                 memcpy(priv->curve_data, entry->data, data_len);
 227                         } else {
 228                                 err = p54_convert_rev0_to_rev1(dev, (struct pda_pa_curve_data *)entry->data);
 229                                 if (err)
 230                                         goto err;
 231                         }
 232
 233                         break;
 234                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 235                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 236                         if (!priv->iq_autocal) {
 237                                 err = -ENOMEM;
 238                                 goto err;
 239                         }
 240
 241                         memcpy(priv->iq_autocal, entry->data, data_len);
 242                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 243                         break;
 244                 case PDR_INTERFACE_LIST:
 245                         tmp = entry->data;
 246                         while ((u8 *)tmp < entry->data + data_len) {
 247                                 struct bootrec_exp_if *exp_if = tmp;
 248                                 if (le16_to_cpu(exp_if->if_id) == 0xF)
 249                                         priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
 250                                 tmp += sizeof(struct bootrec_exp_if);
 251                         }
 252                         break;
 253                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 254                         priv->version = *(u8 *)(entry->data + 1);
 255                         break;
 256                 case PDR_END:
 257                         /* make it overrun */
 258                         entry_len = len;
 259                         break;
 260                 }
 261
 262                 entry = (void *)entry + (entry_len + 1)*2;
 263         }
 264
 265         if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
 266                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 267                 err = -EINVAL;
 268                 goto err;
 269         }
 270
 271         return 0;
 272
 273   err:
 274         if (priv->iq_autocal) {
 275                 kfree(priv->iq_autocal);
 276                 priv->iq_autocal = NULL;
 277         }
 278
 279         if (priv->output_limit) {
 280                 kfree(priv->output_limit);
 281                 priv->output_limit = NULL;
 282         }
 283
 284         if (priv->curve_data) {
 285                 kfree(priv->curve_data);
 286                 priv->curve_data = NULL;
 287         }
 288
 289         printk(KERN_ERR "p54: eeprom parse failed!\n");
 290         return err;
 291 }
 292 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 293
 294 void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
 295 {
 296         struct p54_eeprom_lm86 *eeprom_hdr;
 297
 298         hdr->magic1 = cpu_to_le16(0x8000);
 299         hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
 300         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
 301         hdr->retry1 = hdr->retry2 = 0;
 302         eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
 303         eeprom_hdr->offset = 0x0;
 304         eeprom_hdr->len = cpu_to_le16(0x2000);
 305 }
 306 EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
 307
 308 static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 309 {
 310         struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
 311         struct ieee80211_rx_status rx_status = {0};
 312         u16 freq = le16_to_cpu(hdr->freq);
 313
 314         rx_status.ssi = hdr->rssi;
 315         rx_status.rate = hdr->rate & 0x1f; /* report short preambles & CCK too */
 316         rx_status.channel = freq == 2484 ? 14 : (freq - 2407)/5;
 317         rx_status.freq = freq;
 318         rx_status.phymode = MODE_IEEE80211G;
 319         rx_status.antenna = hdr->antenna;
 320         rx_status.mactime = le64_to_cpu(hdr->timestamp);
 321         rx_status.flag |= RX_FLAG_TSFT;
 322
 323         skb_pull(skb, sizeof(*hdr));
 324         skb_trim(skb, le16_to_cpu(hdr->len));
 325
 326         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 327 }
 328
 329 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 330 {
 331         struct p54_common *priv = dev->priv;
 332         int i;
 333
 334         /* ieee80211_start_queues is great if all queues are really empty.
 335          * But, what if some are full? */
 336
 337         for (i = 0; i < dev->queues; i++)
 338                 if (priv->tx_stats.data[i].len < priv->tx_stats.data[i].limit)
 339                         ieee80211_wake_queue(dev, i);
 340 }
 341
 342 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 343 {
 344         struct p54_common *priv = dev->priv;
 345         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 346         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
 347         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 348         u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
 349         struct memrecord *range = NULL;
 350         u32 freed = 0;
 351         u32 last_addr = priv->rx_start;
 352
 353         while (entry != (struct sk_buff *)&priv->tx_queue) {
 354                 range = (struct memrecord *)&entry->cb;
 355                 if (range->start_addr == addr) {
 356                         struct ieee80211_tx_status status = {{0}};
 357                         struct p54_control_hdr *entry_hdr;
 358                         struct p54_tx_control_allocdata *entry_data;
 359                         int pad = 0;
 360
 361                         if (entry->next != (struct sk_buff *)&priv->tx_queue)
 362                                 freed = ((struct memrecord *)&entry->next->cb)->start_addr - last_addr;
 363                         else
 364                                 freed = priv->rx_end - last_addr;
 365
 366                         last_addr = range->end_addr;
 367                         __skb_unlink(entry, &priv->tx_queue);
 368                         if (!range->control) {
 369                                 kfree_skb(entry);
 370                                 break;
 371                         }
 372                         memcpy(&status.control, range->control,
 373                                sizeof(status.control));
 374                         kfree(range->control);
 375                         priv->tx_stats.data[status.control.queue].len--;
 376
 377                         entry_hdr = (struct p54_control_hdr *) entry->data;
 378                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
 379                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
 380                                 pad = entry_data->align[0];
 381
 382                         if (!(status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
 383                                 if (!(payload->status & 0x01))
 384                                         status.flags |= IEEE80211_TX_STATUS_ACK;
 385                                 else
 386                                         status.excessive_retries = 1;
 387                         }
 388                         status.retry_count = payload->retries - 1;
 389                         status.ack_signal = le16_to_cpu(payload->ack_rssi);
 390                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 391                         ieee80211_tx_status_irqsafe(dev, entry, &status);
 392                         break;
 393                 } else
 394                         last_addr = range->end_addr;
 395                 entry = entry->next;
 396         }
 397
 398         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 399             sizeof(struct p54_control_hdr))
 400                 p54_wake_free_queues(dev);
 401 }
 402
 403 static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 404 {
 405         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 406
 407         switch (le16_to_cpu(hdr->type)) {
 408         case P54_CONTROL_TYPE_TXDONE:
 409                 p54_rx_frame_sent(dev, skb);
 410                 break;
 411         case P54_CONTROL_TYPE_BBP:
 412                 break;
 413         default:
 414                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 415                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 416                 break;
 417         }
 418 }
 419
 420 /* returns zero if skb can be reused */
 421 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 422 {
 423         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
 424         switch (type) {
 425         case 0x00:
 426         case 0x01:
 427                 p54_rx_data(dev, skb);
 428                 return -1;
 429         case 0x4d:
 430                 /* TODO: do something better... but then again, I've never seen this happen */
 431                 printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
 432                        wiphy_name(dev->wiphy));
 433                 break;
 434         case 0x80:
 435                 p54_rx_control(dev, skb);
 436                 break;
 437         default:
 438                 printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
 439                        wiphy_name(dev->wiphy), type);
 440                 break;
 441         }
 442         return 0;
 443 }
 444 EXPORT_SYMBOL_GPL(p54_rx);
 445
 446 /*
 447  * So, the firmware is somewhat stupid and doesn't know what places in its
 448  * memory incoming data should go to. By poking around in the firmware, we
 449  * can find some unused memory to upload our packets to. However, data that we
 450  * want the card to TX needs to stay intact until the card has told us that
 451  * it is done with it. This function finds empty places we can upload to and
 452  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 453  * allocated areas.
 454  */
 455 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 456                                struct p54_control_hdr *data, u32 len,
 457                                struct ieee80211_tx_control *control)
 458 {
 459         struct p54_common *priv = dev->priv;
 460         struct sk_buff *entry = priv->tx_queue.next;
 461         struct sk_buff *target_skb = NULL;
 462         struct memrecord *range;
 463         u32 last_addr = priv->rx_start;
 464         u32 largest_hole = 0;
 465         u32 target_addr = priv->rx_start;
 466         unsigned long flags;
 467         unsigned int left;
 468         len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
 469
 470         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 471         left = skb_queue_len(&priv->tx_queue);
 472         while (left--) {
 473                 u32 hole_size;
 474                 range = (struct memrecord *)&entry->cb;
 475                 hole_size = range->start_addr - last_addr;
 476                 if (!target_skb && hole_size >= len) {
 477                         target_skb = entry->prev;
 478                         hole_size -= len;
 479                         target_addr = last_addr;
 480                 }
 481                 largest_hole = max(largest_hole, hole_size);
 482                 last_addr = range->end_addr;
 483                 entry = entry->next;
 484         }
 485         if (!target_skb && priv->rx_end - last_addr >= len) {
 486                 target_skb = priv->tx_queue.prev;
 487                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 488                 if (!skb_queue_empty(&priv->tx_queue)) {
 489                         range = (struct memrecord *)&target_skb->cb;
 490                         target_addr = range->end_addr;
 491                 }
 492         } else
 493                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 494
 495         if (skb) {
 496                 range = (struct memrecord *)&skb->cb;
 497                 range->start_addr = target_addr;
 498                 range->end_addr = target_addr + len;
 499                 range->control = control;
 500                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
 501                 if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 502                                    sizeof(struct p54_control_hdr))
 503                         ieee80211_stop_queues(dev);
 504         }
 505         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 506
 507         data->req_id = cpu_to_le32(target_addr + 0x70);
 508 }
 509
 510 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 511                   struct ieee80211_tx_control *control)
 512 {
 513         struct ieee80211_tx_queue_stats_data *current_queue;
 514         struct p54_common *priv = dev->priv;
 515         struct p54_control_hdr *hdr;
 516         struct p54_tx_control_allocdata *txhdr;
 517         struct ieee80211_tx_control *control_copy;
 518         size_t padding, len;
 519         u8 rate;
 520
 521         current_queue = &priv->tx_stats.data[control->queue];
 522         if (unlikely(current_queue->len > current_queue->limit))
 523                 return NETDEV_TX_BUSY;
 524         current_queue->len++;
 525         current_queue->count++;
 526         if (current_queue->len == current_queue->limit)
 527                 ieee80211_stop_queue(dev, control->queue);
 528
 529         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 530         len = skb->len;
 531
 532         control_copy = kmalloc(sizeof(*control), GFP_ATOMIC);
 533         if (control_copy)
 534                 memcpy(control_copy, control, sizeof(*control));
 535
 536         txhdr = (struct p54_tx_control_allocdata *)
 537                         skb_push(skb, sizeof(*txhdr) + padding);
 538         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
 539
 540         if (padding)
 541                 hdr->magic1 = cpu_to_le16(0x4010);
 542         else
 543                 hdr->magic1 = cpu_to_le16(0x0010);
 544         hdr->len = cpu_to_le16(len);
 545         hdr->type = (control->flags & IEEE80211_TXCTL_NO_ACK) ? 0 : cpu_to_le16(1);
 546         hdr->retry1 = hdr->retry2 = control->retry_limit;
 547         p54_assign_address(dev, skb, hdr, skb->len, control_copy);
 548
 549         memset(txhdr->wep_key, 0x0, 16);
 550         txhdr->padding = 0;
 551         txhdr->padding2 = 0;
 552
 553         /* TODO: add support for alternate retry TX rates */
 554         rate = control->tx_rate;
 555         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
 556                 rate |= 0x40;
 557         else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
 558                 rate |= 0x20;
 559         memset(txhdr->rateset, rate, 8);
 560         txhdr->wep_key_present = 0;
 561         txhdr->wep_key_len = 0;
 562         txhdr->frame_type = cpu_to_le32(control->queue + 4);
 563         txhdr->magic4 = 0;
 564         txhdr->antenna = (control->antenna_sel_tx == 0) ?
 565                 2 : control->antenna_sel_tx - 1;
 566         txhdr->output_power = 0x7f; // HW Maximum
 567         txhdr->magic5 = (control->flags & IEEE80211_TXCTL_NO_ACK) ?
 568                 0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
 569         if (padding)
 570                 txhdr->align[0] = padding;
 571
 572         priv->tx(dev, hdr, skb->len, 0);
 573         return 0;
 574 }
 575
 576 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
 577                           const u8 *dst, const u8 *src, u8 antenna,
 578                           u32 magic3, u32 magic8, u32 magic9)
 579 {
 580         struct p54_common *priv = dev->priv;
 581         struct p54_control_hdr *hdr;
 582         struct p54_tx_control_filter *filter;
 583
 584         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
 585                       priv->tx_hdr_len, GFP_ATOMIC);
 586         if (!hdr)
 587                 return -ENOMEM;
 588
 589         hdr = (void *)hdr + priv->tx_hdr_len;
 590
 591         filter = (struct p54_tx_control_filter *) hdr->data;
 592         hdr->magic1 = cpu_to_le16(0x8001);
 593         hdr->len = cpu_to_le16(sizeof(*filter));
 594         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter), NULL);
 595         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
 596
 597         filter->filter_type = cpu_to_le16(filter_type);
 598         memcpy(filter->dst, dst, ETH_ALEN);
 599         if (!src)
 600                 memset(filter->src, ~0, ETH_ALEN);
 601         else
 602                 memcpy(filter->src, src, ETH_ALEN);
 603         filter->antenna = antenna;
 604         filter->magic3 = cpu_to_le32(magic3);
 605         filter->rx_addr = cpu_to_le32(priv->rx_end);
 606         filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
 607         filter->rxhw = priv->rxhw;
 608         filter->magic8 = cpu_to_le16(magic8);
 609         filter->magic9 = cpu_to_le16(magic9);
 610
 611         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
 612         return 0;
 613 }
 614
 615 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
 616 {
 617         struct p54_common *priv = dev->priv;
 618         struct p54_control_hdr *hdr;
 619         struct p54_tx_control_channel *chan;
 620         unsigned int i;
 621         size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
 622                              sizeof(*chan->curve_data) *
 623                              priv->curve_data->points_per_channel;
 624         void *entry;
 625
 626         hdr = kzalloc(sizeof(*hdr) + payload_len +
 627                       priv->tx_hdr_len, GFP_KERNEL);
 628         if (!hdr)
 629                 return -ENOMEM;
 630
 631         hdr = (void *)hdr + priv->tx_hdr_len;
 632
 633         chan = (struct p54_tx_control_channel *) hdr->data;
 634
 635         hdr->magic1 = cpu_to_le16(0x8001);
 636         hdr->len = cpu_to_le16(sizeof(*chan));
 637         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
 638         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len, NULL);
 639
 640         chan->magic1 = cpu_to_le16(0x1);
 641         chan->magic2 = cpu_to_le16(0x0);
 642
 643         for (i = 0; i < priv->iq_autocal_len; i++) {
 644                 if (priv->iq_autocal[i].freq != freq)
 645                         continue;
 646
 647                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
 648                        sizeof(*priv->iq_autocal));
 649                 break;
 650         }
 651         if (i == priv->iq_autocal_len)
 652                 goto err;
 653
 654         for (i = 0; i < priv->output_limit_len; i++) {
 655                 if (priv->output_limit[i].freq != freq)
 656                         continue;
 657
 658                 chan->val_barker = 0x38;
 659                 chan->val_bpsk = priv->output_limit[i].val_bpsk;
 660                 chan->val_qpsk = priv->output_limit[i].val_qpsk;
 661                 chan->val_16qam = priv->output_limit[i].val_16qam;
 662                 chan->val_64qam = priv->output_limit[i].val_64qam;
 663                 break;
 664         }
 665         if (i == priv->output_limit_len)
 666                 goto err;
 667
 668         chan->pa_points_per_curve = priv->curve_data->points_per_channel;
 669
 670         entry = priv->curve_data->data;
 671         for (i = 0; i < priv->curve_data->channels; i++) {
 672                 if (*((__le16 *)entry) != freq) {
 673                         entry += sizeof(__le16);
 674                         entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
 675                                  chan->pa_points_per_curve;
 676                         continue;
 677                 }
 678
 679                 entry += sizeof(__le16);
 680                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
 681                        chan->pa_points_per_curve);
 682                 break;
 683         }
 684
 685         memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
 686
 687         priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
 688         return 0;
 689
 690  err:
 691         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
 692         kfree(hdr);
 693         return -EINVAL;
 694 }
 695
 696 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
 697 {
 698         struct p54_common *priv = dev->priv;
 699         struct p54_control_hdr *hdr;
 700         struct p54_tx_control_led *led;
 701
 702         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
 703                       priv->tx_hdr_len, GFP_KERNEL);
 704         if (!hdr)
 705                 return -ENOMEM;
 706
 707         hdr = (void *)hdr + priv->tx_hdr_len;
 708         hdr->magic1 = cpu_to_le16(0x8001);
 709         hdr->len = cpu_to_le16(sizeof(*led));
 710         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
 711         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led), NULL);
 712
 713         led = (struct p54_tx_control_led *) hdr->data;
 714         led->mode = cpu_to_le16(mode);
 715         led->led_permanent = cpu_to_le16(link);
 716         led->led_temporary = cpu_to_le16(act);
 717         led->duration = cpu_to_le16(1000);
 718
 719         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
 720
 721         return 0;
 722 }
 723
 724 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, burst)      \
 725 do {                                                            \
 726         queue.aifs = cpu_to_le16(ai_fs);                        \
 727         queue.cwmin = cpu_to_le16(cw_min);                      \
 728         queue.cwmax = cpu_to_le16(cw_max);                      \
 729         queue.txop = (burst == 0) ?                             \
 730                 0 : cpu_to_le16((burst * 100) / 32 + 1);        \
 731 } while(0)
 732
 733 static void p54_init_vdcf(struct ieee80211_hw *dev)
 734 {
 735         struct p54_common *priv = dev->priv;
 736         struct p54_control_hdr *hdr;
 737         struct p54_tx_control_vdcf *vdcf;
 738
 739         /* all USB V1 adapters need a extra headroom */
 740         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 741         hdr->magic1 = cpu_to_le16(0x8001);
 742         hdr->len = cpu_to_le16(sizeof(*vdcf));
 743         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
 744         hdr->req_id = cpu_to_le32(priv->rx_start);
 745
 746         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 747
 748         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 0x000f);
 749         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 0x001e);
 750         P54_SET_QUEUE(vdcf->queue[2], 0x0002, 0x000f, 0x03ff, 0x0014);
 751         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0x0000);
 752 }
 753
 754 static void p54_set_vdcf(struct ieee80211_hw *dev)
 755 {
 756         struct p54_common *priv = dev->priv;
 757         struct p54_control_hdr *hdr;
 758         struct p54_tx_control_vdcf *vdcf;
 759
 760         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 761
 762         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf), NULL);
 763
 764         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 765
 766         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
 767                 vdcf->slottime = 9;
 768                 vdcf->magic1 = 0x00;
 769                 vdcf->magic2 = 0x10;
 770         } else {
 771                 vdcf->slottime = 20;
 772                 vdcf->magic1 = 0x0a;
 773                 vdcf->magic2 = 0x06;
 774         }
 775
 776         /* (see prism54/isl_oid.h for further details) */
 777         vdcf->frameburst = cpu_to_le16(0);
 778
 779         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
 780 }
 781
 782 static int p54_start(struct ieee80211_hw *dev)
 783 {
 784         struct p54_common *priv = dev->priv;
 785         int err;
 786
 787         err = priv->open(dev);
 788         if (!err)
 789                 priv->mode = IEEE80211_IF_TYPE_MNTR;
 790
 791         return err;
 792 }
 793
 794 static void p54_stop(struct ieee80211_hw *dev)
 795 {
 796         struct p54_common *priv = dev->priv;
 797         struct sk_buff *skb;
 798         while ((skb = skb_dequeue(&priv->tx_queue))) {
 799                 struct memrecord *range = (struct memrecord *)&skb->cb;
 800                 if (range->control)
 801                         kfree(range->control);
 802                 kfree_skb(skb);
 803         }
 804         priv->stop(dev);
 805         priv->mode = IEEE80211_IF_TYPE_INVALID;
 806 }
 807
 808 static int p54_add_interface(struct ieee80211_hw *dev,
 809                              struct ieee80211_if_init_conf *conf)
 810 {
 811         struct p54_common *priv = dev->priv;
 812
 813         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
 814                 return -EOPNOTSUPP;
 815
 816         switch (conf->type) {
 817         case IEEE80211_IF_TYPE_STA:
 818                 priv->mode = conf->type;
 819                 break;
 820         default:
 821                 return -EOPNOTSUPP;
 822         }
 823
 824         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
 825
 826         p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
 827         p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
 828
 829         switch (conf->type) {
 830         case IEEE80211_IF_TYPE_STA:
 831                 p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
 832                 break;
 833         default:
 834                 BUG();  /* impossible */
 835                 break;
 836         }
 837
 838         p54_set_leds(dev, 1, 0, 0);
 839
 840         return 0;
 841 }
 842
 843 static void p54_remove_interface(struct ieee80211_hw *dev,
 844                                  struct ieee80211_if_init_conf *conf)
 845 {
 846         struct p54_common *priv = dev->priv;
 847         priv->mode = IEEE80211_IF_TYPE_MNTR;
 848         memset(priv->mac_addr, 0, ETH_ALEN);
 849         p54_set_filter(dev, 0, priv->mac_addr, NULL, 2, 0, 0, 0);
 850 }
 851
 852 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
 853 {
 854         int ret;
 855
 856         ret = p54_set_freq(dev, cpu_to_le16(conf->freq));
 857         p54_set_vdcf(dev);
 858         return ret;
 859 }
 860
 861 static int p54_config_interface(struct ieee80211_hw *dev,
 862                                 struct ieee80211_vif *vif,
 863                                 struct ieee80211_if_conf *conf)
 864 {
 865         struct p54_common *priv = dev->priv;
 866
 867         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
 868         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
 869         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
 870         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
 871         return 0;
 872 }
 873
 874 static void p54_configure_filter(struct ieee80211_hw *dev,
 875                                  unsigned int changed_flags,
 876                                  unsigned int *total_flags,
 877                                  int mc_count, struct dev_mc_list *mclist)
 878 {
 879         struct p54_common *priv = dev->priv;
 880
 881         *total_flags &= FIF_BCN_PRBRESP_PROMISC;
 882
 883         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
 884                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
 885                         p54_set_filter(dev, 0, priv->mac_addr,
 886                                        NULL, 2, 0, 0, 0);
 887                 else
 888                         p54_set_filter(dev, 0, priv->mac_addr,
 889                                        priv->bssid, 2, 0, 0, 0);
 890         }
 891 }
 892
 893 static int p54_conf_tx(struct ieee80211_hw *dev, int queue,
 894                        const struct ieee80211_tx_queue_params *params)
 895 {
 896         struct p54_common *priv = dev->priv;
 897         struct p54_tx_control_vdcf *vdcf;
 898
 899         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
 900                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
 901
 902         if ((params) && !((queue < 0) || (queue > 4))) {
 903                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
 904                         params->cw_min, params->cw_max, params->burst_time);
 905         } else
 906                 return -EINVAL;
 907
 908         p54_set_vdcf(dev);
 909
 910         return 0;
 911 }
 912
 913 static int p54_get_stats(struct ieee80211_hw *dev,
 914                          struct ieee80211_low_level_stats *stats)
 915 {
 916         /* TODO */
 917         return 0;
 918 }
 919
 920 static int p54_get_tx_stats(struct ieee80211_hw *dev,
 921                             struct ieee80211_tx_queue_stats *stats)
 922 {
 923         struct p54_common *priv = dev->priv;
 924         unsigned int i;
 925
 926         for (i = 0; i < dev->queues; i++)
 927                 memcpy(&stats->data[i], &priv->tx_stats.data[i],
 928                         sizeof(stats->data[i]));
 929
 930         return 0;
 931 }
 932
 933 static const struct ieee80211_ops p54_ops = {
 934         .tx                     = p54_tx,
 935         .start                  = p54_start,
 936         .stop                   = p54_stop,
 937         .add_interface          = p54_add_interface,
 938         .remove_interface       = p54_remove_interface,
 939         .config                 = p54_config,
 940         .config_interface       = p54_config_interface,
 941         .configure_filter       = p54_configure_filter,
 942         .conf_tx                = p54_conf_tx,
 943         .get_stats              = p54_get_stats,
 944         .get_tx_stats           = p54_get_tx_stats
 945 };
 946
 947 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 948 {
 949         struct ieee80211_hw *dev;
 950         struct p54_common *priv;
 951         int i;
 952
 953         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
 954         if (!dev)
 955                 return NULL;
 956
 957         priv = dev->priv;
 958         priv->mode = IEEE80211_IF_TYPE_INVALID;
 959         skb_queue_head_init(&priv->tx_queue);
 960         memcpy(priv->channels, p54_channels, sizeof(p54_channels));
 961         memcpy(priv->rates, p54_rates, sizeof(p54_rates));
 962         priv->modes[1].mode = MODE_IEEE80211B;
 963         priv->modes[1].num_rates = 4;
 964         priv->modes[1].rates = priv->rates;
 965         priv->modes[1].num_channels = ARRAY_SIZE(p54_channels);
 966         priv->modes[1].channels = priv->channels;
 967         priv->modes[0].mode = MODE_IEEE80211G;
 968         priv->modes[0].num_rates = ARRAY_SIZE(p54_rates);
 969         priv->modes[0].rates = priv->rates;
 970         priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
 971         priv->modes[0].channels = priv->channels;
 972         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
 973                     IEEE80211_HW_RX_INCLUDES_FCS;
 974         dev->channel_change_time = 1000;        /* TODO: find actual value */
 975         dev->max_rssi = 127;
 976
 977         priv->tx_stats.data[0].limit = 5;
 978         dev->queues = 1;
 979
 980         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
 981                                  sizeof(struct p54_tx_control_allocdata);
 982
 983         priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
 984               priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
 985
 986         if (!priv->cached_vdcf) {
 987                 ieee80211_free_hw(dev);
 988                 return NULL;
 989         }
 990
 991         p54_init_vdcf(dev);
 992
 993         for (i = 0; i < 2; i++) {
 994                 if (ieee80211_register_hwmode(dev, &priv->modes[i])) {
 995                         kfree(priv->cached_vdcf);
 996                         ieee80211_free_hw(dev);
 997                         return NULL;
 998                 }
 999         }
1000
1001         return dev;
1002 }
1003 EXPORT_SYMBOL_GPL(p54_init_common);
1004
1005 void p54_free_common(struct ieee80211_hw *dev)
1006 {
1007         struct p54_common *priv = dev->priv;
1008         kfree(priv->iq_autocal);
1009         kfree(priv->output_limit);
1010         kfree(priv->curve_data);
1011         kfree(priv->cached_vdcf);
1012 }
1013 EXPORT_SYMBOL_GPL(p54_free_common);
1014
1015 static int __init p54_init(void)
1016 {
1017         return 0;
1018 }
1019
1020 static void __exit p54_exit(void)
1021 {
1022 }
1023
1024 module_init(p54_init);
1025 module_exit(p54_exit);