git.oblomov.eu Git - linux-2.6/blob - 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(*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(bootrec->data[1]);
  82                         /* FIXME add sanity checking */
  83                         priv->rx_end = le32_to_cpu(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 == 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         int i = 0;
 170         unsigned int data_len, entry_len;
 171         void *tmp;
 172         int err;
 173
 174         wrap = (struct eeprom_pda_wrap *) eeprom;
 175         entry = (void *)wrap->data + wrap->len;
 176         i += 2;
 177         i += le16_to_cpu(entry->len)*2;
 178         while (i < len) {
 179                 entry_len = le16_to_cpu(entry->len);
 180                 data_len = ((entry_len - 1) << 1);
 181                 switch (le16_to_cpu(entry->code)) {
 182                 case PDR_MAC_ADDRESS:
 183                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 184                         break;
 185                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 186                         if (data_len < 2) {
 187                                 err = -EINVAL;
 188                                 goto err;
 189                         }
 190
 191                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 192                                 err = -EINVAL;
 193                                 goto err;
 194                         }
 195
 196                         priv->output_limit = kmalloc(entry->data[1] *
 197                                 sizeof(*priv->output_limit), GFP_KERNEL);
 198
 199                         if (!priv->output_limit) {
 200                                 err = -ENOMEM;
 201                                 goto err;
 202                         }
 203
 204                         memcpy(priv->output_limit, &entry->data[2],
 205                                entry->data[1]*sizeof(*priv->output_limit));
 206                         priv->output_limit_len = entry->data[1];
 207                         break;
 208                 case PDR_PRISM_PA_CAL_CURVE_DATA:
 209                         if (data_len < sizeof(struct pda_pa_curve_data)) {
 210                                 err = -EINVAL;
 211                                 goto err;
 212                         }
 213
 214                         if (((struct pda_pa_curve_data *)entry->data)->cal_method_rev) {
 215                                 priv->curve_data = kmalloc(data_len, GFP_KERNEL);
 216                                 if (!priv->curve_data) {
 217                                         err = -ENOMEM;
 218                                         goto err;
 219                                 }
 220
 221                                 memcpy(priv->curve_data, entry->data, data_len);
 222                         } else {
 223                                 err = p54_convert_rev0_to_rev1(dev, (struct pda_pa_curve_data *)entry->data);
 224                                 if (err)
 225                                         goto err;
 226                         }
 227
 228                         break;
 229                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 230                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 231                         if (!priv->iq_autocal) {
 232                                 err = -ENOMEM;
 233                                 goto err;
 234                         }
 235
 236                         memcpy(priv->iq_autocal, entry->data, data_len);
 237                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 238                         break;
 239                 case PDR_INTERFACE_LIST:
 240                         tmp = entry->data;
 241                         while ((u8 *)tmp < entry->data + data_len) {
 242                                 struct bootrec_exp_if *exp_if = tmp;
 243                                 if (le16_to_cpu(exp_if->if_id) == 0xF)
 244                                         priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
 245                                 tmp += sizeof(struct bootrec_exp_if);
 246                         }
 247                         break;
 248                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 249                         priv->version = *(u8 *)(entry->data + 1);
 250                         break;
 251                 case PDR_END:
 252                         i = len;
 253                         break;
 254                 }
 255
 256                 entry = (void *)entry + (entry_len + 1)*2;
 257                 i += 2;
 258                 i += entry_len*2;
 259         }
 260
 261         if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
 262                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 263                 err = -EINVAL;
 264                 goto err;
 265         }
 266
 267         return 0;
 268
 269   err:
 270         if (priv->iq_autocal) {
 271                 kfree(priv->iq_autocal);
 272                 priv->iq_autocal = NULL;
 273         }
 274
 275         if (priv->output_limit) {
 276                 kfree(priv->output_limit);
 277                 priv->output_limit = NULL;
 278         }
 279
 280         if (priv->curve_data) {
 281                 kfree(priv->curve_data);
 282                 priv->curve_data = NULL;
 283         }
 284
 285         printk(KERN_ERR "p54: eeprom parse failed!\n");
 286         return err;
 287 }
 288 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 289
 290 void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
 291 {
 292         struct p54_eeprom_lm86 *eeprom_hdr;
 293
 294         hdr->magic1 = cpu_to_le16(0x8000);
 295         hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
 296         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
 297         hdr->retry1 = hdr->retry2 = 0;
 298         eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
 299         eeprom_hdr->offset = 0x0;
 300         eeprom_hdr->len = cpu_to_le16(0x2000);
 301 }
 302 EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
 303
 304 static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 305 {
 306         struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
 307         struct ieee80211_rx_status rx_status = {0};
 308         u16 freq = le16_to_cpu(hdr->freq);
 309
 310         rx_status.ssi = hdr->rssi;
 311         rx_status.rate = hdr->rate & 0x1f; /* report short preambles & CCK too */
 312         rx_status.channel = freq == 2484 ? 14 : (freq - 2407)/5;
 313         rx_status.freq = freq;
 314         rx_status.phymode = MODE_IEEE80211G;
 315         rx_status.antenna = hdr->antenna;
 316         rx_status.mactime = le64_to_cpu(hdr->timestamp);
 317
 318         skb_pull(skb, sizeof(*hdr));
 319         skb_trim(skb, le16_to_cpu(hdr->len));
 320
 321         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 322 }
 323
 324 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 325 {
 326         struct p54_common *priv = dev->priv;
 327         int i;
 328
 329         /* ieee80211_start_queues is great if all queues are really empty.
 330          * But, what if some are full? */
 331
 332         for (i = 0; i < dev->queues; i++)
 333                 if (priv->tx_stats.data[i].len < priv->tx_stats.data[i].limit)
 334                         ieee80211_wake_queue(dev, i);
 335 }
 336
 337 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 338 {
 339         struct p54_common *priv = dev->priv;
 340         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 341         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
 342         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 343         u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
 344         struct memrecord *range = NULL;
 345         u32 freed = 0;
 346         u32 last_addr = priv->rx_start;
 347
 348         while (entry != (struct sk_buff *)&priv->tx_queue) {
 349                 range = (struct memrecord *)&entry->cb;
 350                 if (range->start_addr == addr) {
 351                         struct ieee80211_tx_status status = {{0}};
 352                         struct p54_control_hdr *entry_hdr;
 353                         struct p54_tx_control_allocdata *entry_data;
 354                         int pad = 0;
 355
 356                         if (entry->next != (struct sk_buff *)&priv->tx_queue)
 357                                 freed = ((struct memrecord *)&entry->next->cb)->start_addr - last_addr;
 358                         else
 359                                 freed = priv->rx_end - last_addr;
 360
 361                         last_addr = range->end_addr;
 362                         __skb_unlink(entry, &priv->tx_queue);
 363                         if (!range->control) {
 364                                 kfree_skb(entry);
 365                                 break;
 366                         }
 367                         memcpy(&status.control, range->control,
 368                                sizeof(status.control));
 369                         kfree(range->control);
 370                         priv->tx_stats.data[status.control.queue].len--;
 371
 372                         entry_hdr = (struct p54_control_hdr *) entry->data;
 373                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
 374                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
 375                                 pad = entry_data->align[0];
 376
 377                         if (!status.control.flags & IEEE80211_TXCTL_NO_ACK) {
 378                                 if (!(payload->status & 0x01))
 379                                         status.flags |= IEEE80211_TX_STATUS_ACK;
 380                                 else
 381                                         status.excessive_retries = 1;
 382                         }
 383                         status.retry_count = payload->retries - 1;
 384                         status.ack_signal = le16_to_cpu(payload->ack_rssi);
 385                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 386                         ieee80211_tx_status_irqsafe(dev, entry, &status);
 387                         break;
 388                 } else
 389                         last_addr = range->end_addr;
 390                 entry = entry->next;
 391         }
 392
 393         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 394             sizeof(struct p54_control_hdr))
 395                 p54_wake_free_queues(dev);
 396 }
 397
 398 static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 399 {
 400         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 401
 402         switch (le16_to_cpu(hdr->type)) {
 403         case P54_CONTROL_TYPE_TXDONE:
 404                 p54_rx_frame_sent(dev, skb);
 405                 break;
 406         case P54_CONTROL_TYPE_BBP:
 407                 break;
 408         default:
 409                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 410                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 411                 break;
 412         }
 413 }
 414
 415 /* returns zero if skb can be reused */
 416 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 417 {
 418         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
 419         switch (type) {
 420         case 0x00:
 421         case 0x01:
 422                 p54_rx_data(dev, skb);
 423                 return -1;
 424         case 0x4d:
 425                 /* TODO: do something better... but then again, I've never seen this happen */
 426                 printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
 427                        wiphy_name(dev->wiphy));
 428                 break;
 429         case 0x80:
 430                 p54_rx_control(dev, skb);
 431                 break;
 432         default:
 433                 printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
 434                        wiphy_name(dev->wiphy), type);
 435                 break;
 436         }
 437         return 0;
 438 }
 439 EXPORT_SYMBOL_GPL(p54_rx);
 440
 441 /*
 442  * So, the firmware is somewhat stupid and doesn't know what places in its
 443  * memory incoming data should go to. By poking around in the firmware, we
 444  * can find some unused memory to upload our packets to. However, data that we
 445  * want the card to TX needs to stay intact until the card has told us that
 446  * it is done with it. This function finds empty places we can upload to and
 447  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 448  * allocated areas.
 449  */
 450 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 451                                struct p54_control_hdr *data, u32 len,
 452                                struct ieee80211_tx_control *control)
 453 {
 454         struct p54_common *priv = dev->priv;
 455         struct sk_buff *entry = priv->tx_queue.next;
 456         struct sk_buff *target_skb = NULL;
 457         struct memrecord *range;
 458         u32 last_addr = priv->rx_start;
 459         u32 largest_hole = 0;
 460         u32 target_addr = priv->rx_start;
 461         unsigned long flags;
 462         unsigned int left;
 463         len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
 464
 465         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 466         left = skb_queue_len(&priv->tx_queue);
 467         while (left--) {
 468                 u32 hole_size;
 469                 range = (struct memrecord *)&entry->cb;
 470                 hole_size = range->start_addr - last_addr;
 471                 if (!target_skb && hole_size >= len) {
 472                         target_skb = entry->prev;
 473                         hole_size -= len;
 474                         target_addr = last_addr;
 475                 }
 476                 largest_hole = max(largest_hole, hole_size);
 477                 last_addr = range->end_addr;
 478                 entry = entry->next;
 479         }
 480         if (!target_skb && priv->rx_end - last_addr >= len) {
 481                 target_skb = priv->tx_queue.prev;
 482                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 483                 if (!skb_queue_empty(&priv->tx_queue)) {
 484                         range = (struct memrecord *)&target_skb->cb;
 485                         target_addr = range->end_addr;
 486                 }
 487         } else
 488                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 489
 490         if (skb) {
 491                 range = (struct memrecord *)&skb->cb;
 492                 range->start_addr = target_addr;
 493                 range->end_addr = target_addr + len;
 494                 range->control = control;
 495                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
 496                 if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 497                                    sizeof(struct p54_control_hdr))
 498                         ieee80211_stop_queues(dev);
 499         }
 500         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 501
 502         data->req_id = cpu_to_le32(target_addr + 0x70);
 503 }
 504
 505 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 506                   struct ieee80211_tx_control *control)
 507 {
 508         struct ieee80211_tx_queue_stats_data *current_queue;
 509         struct p54_common *priv = dev->priv;
 510         struct p54_control_hdr *hdr;
 511         struct p54_tx_control_allocdata *txhdr;
 512         struct ieee80211_tx_control *control_copy;
 513         size_t padding, len;
 514         u8 rate;
 515
 516         current_queue = &priv->tx_stats.data[control->queue];
 517         if (unlikely(current_queue->len > current_queue->limit))
 518                 return NETDEV_TX_BUSY;
 519         current_queue->len++;
 520         current_queue->count++;
 521         if (current_queue->len == current_queue->limit)
 522                 ieee80211_stop_queue(dev, control->queue);
 523
 524         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 525         len = skb->len;
 526
 527         control_copy = kmalloc(sizeof(*control), GFP_ATOMIC);
 528         if (control_copy)
 529                 memcpy(control_copy, control, sizeof(*control));
 530
 531         txhdr = (struct p54_tx_control_allocdata *)
 532                         skb_push(skb, sizeof(*txhdr) + padding);
 533         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
 534
 535         if (padding)
 536                 hdr->magic1 = cpu_to_le16(0x4010);
 537         else
 538                 hdr->magic1 = cpu_to_le16(0x0010);
 539         hdr->len = cpu_to_le16(len);
 540         hdr->type = (control->flags & IEEE80211_TXCTL_NO_ACK) ? 0 : cpu_to_le16(1);
 541         hdr->retry1 = hdr->retry2 = control->retry_limit;
 542         p54_assign_address(dev, skb, hdr, skb->len, control_copy);
 543
 544         memset(txhdr->wep_key, 0x0, 16);
 545         txhdr->padding = 0;
 546         txhdr->padding2 = 0;
 547
 548         /* TODO: add support for alternate retry TX rates */
 549         rate = control->tx_rate;
 550         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
 551                 rate |= 0x40;
 552         else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
 553                 rate |= 0x20;
 554         memset(txhdr->rateset, rate, 8);
 555         txhdr->wep_key_present = 0;
 556         txhdr->wep_key_len = 0;
 557         txhdr->frame_type = cpu_to_le32(control->queue + 4);
 558         txhdr->magic4 = 0;
 559         txhdr->antenna = (control->antenna_sel_tx == 0) ?
 560                 2 : control->antenna_sel_tx - 1;
 561         txhdr->output_power = 0x7f; // HW Maximum
 562         txhdr->magic5 = (control->flags & IEEE80211_TXCTL_NO_ACK) ?
 563                 0 : ((rate > 0x3) ? cpu_to_le32(0x33) : cpu_to_le32(0x23));
 564         if (padding)
 565                 txhdr->align[0] = padding;
 566
 567         priv->tx(dev, hdr, skb->len, 0);
 568         return 0;
 569 }
 570
 571 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
 572                           const u8 *dst, const u8 *src, u8 antenna,
 573                           u32 magic3, u32 magic8, u32 magic9)
 574 {
 575         struct p54_common *priv = dev->priv;
 576         struct p54_control_hdr *hdr;
 577         struct p54_tx_control_filter *filter;
 578
 579         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
 580                       priv->tx_hdr_len, GFP_KERNEL);
 581         if (!hdr)
 582                 return -ENOMEM;
 583
 584         hdr = (void *)hdr + priv->tx_hdr_len;
 585
 586         filter = (struct p54_tx_control_filter *) hdr->data;
 587         hdr->magic1 = cpu_to_le16(0x8001);
 588         hdr->len = cpu_to_le16(sizeof(*filter));
 589         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter), NULL);
 590         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
 591
 592         filter->filter_type = cpu_to_le16(filter_type);
 593         memcpy(filter->dst, dst, ETH_ALEN);
 594         if (!src)
 595                 memset(filter->src, ~0, ETH_ALEN);
 596         else
 597                 memcpy(filter->src, src, ETH_ALEN);
 598         filter->antenna = antenna;
 599         filter->magic3 = cpu_to_le32(magic3);
 600         filter->rx_addr = cpu_to_le32(priv->rx_end);
 601         filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
 602         filter->rxhw = priv->rxhw;
 603         filter->magic8 = cpu_to_le16(magic8);
 604         filter->magic9 = cpu_to_le16(magic9);
 605
 606         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
 607         return 0;
 608 }
 609
 610 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
 611 {
 612         struct p54_common *priv = dev->priv;
 613         struct p54_control_hdr *hdr;
 614         struct p54_tx_control_channel *chan;
 615         unsigned int i;
 616         size_t payload_len = sizeof(*chan) + sizeof(u32)*2 +
 617                              sizeof(*chan->curve_data) *
 618                              priv->curve_data->points_per_channel;
 619         void *entry;
 620
 621         hdr = kzalloc(sizeof(*hdr) + payload_len +
 622                       priv->tx_hdr_len, GFP_KERNEL);
 623         if (!hdr)
 624                 return -ENOMEM;
 625
 626         hdr = (void *)hdr + priv->tx_hdr_len;
 627
 628         chan = (struct p54_tx_control_channel *) hdr->data;
 629
 630         hdr->magic1 = cpu_to_le16(0x8001);
 631         hdr->len = cpu_to_le16(sizeof(*chan));
 632         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
 633         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + payload_len, NULL);
 634
 635         chan->magic1 = cpu_to_le16(0x1);
 636         chan->magic2 = cpu_to_le16(0x0);
 637
 638         for (i = 0; i < priv->iq_autocal_len; i++) {
 639                 if (priv->iq_autocal[i].freq != freq)
 640                         continue;
 641
 642                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
 643                        sizeof(*priv->iq_autocal));
 644                 break;
 645         }
 646         if (i == priv->iq_autocal_len)
 647                 goto err;
 648
 649         for (i = 0; i < priv->output_limit_len; i++) {
 650                 if (priv->output_limit[i].freq != freq)
 651                         continue;
 652
 653                 chan->val_barker = 0x38;
 654                 chan->val_bpsk = priv->output_limit[i].val_bpsk;
 655                 chan->val_qpsk = priv->output_limit[i].val_qpsk;
 656                 chan->val_16qam = priv->output_limit[i].val_16qam;
 657                 chan->val_64qam = priv->output_limit[i].val_64qam;
 658                 break;
 659         }
 660         if (i == priv->output_limit_len)
 661                 goto err;
 662
 663         chan->pa_points_per_curve = priv->curve_data->points_per_channel;
 664
 665         entry = priv->curve_data->data;
 666         for (i = 0; i < priv->curve_data->channels; i++) {
 667                 if (*((__le16 *)entry) != freq) {
 668                         entry += sizeof(__le16);
 669                         entry += sizeof(struct pda_pa_curve_data_sample_rev1) *
 670                                  chan->pa_points_per_curve;
 671                         continue;
 672                 }
 673
 674                 entry += sizeof(__le16);
 675                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
 676                        chan->pa_points_per_curve);
 677                 break;
 678         }
 679
 680         memcpy(hdr->data + payload_len - 4, &chan->val_bpsk, 4);
 681
 682         priv->tx(dev, hdr, sizeof(*hdr) + payload_len, 1);
 683         return 0;
 684
 685  err:
 686         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
 687         kfree(hdr);
 688         return -EINVAL;
 689 }
 690
 691 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
 692 {
 693         struct p54_common *priv = dev->priv;
 694         struct p54_control_hdr *hdr;
 695         struct p54_tx_control_led *led;
 696
 697         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
 698                       priv->tx_hdr_len, GFP_KERNEL);
 699         if (!hdr)
 700                 return -ENOMEM;
 701
 702         hdr = (void *)hdr + priv->tx_hdr_len;
 703         hdr->magic1 = cpu_to_le16(0x8001);
 704         hdr->len = cpu_to_le16(sizeof(*led));
 705         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
 706         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led), NULL);
 707
 708         led = (struct p54_tx_control_led *) hdr->data;
 709         led->mode = cpu_to_le16(mode);
 710         led->led_permanent = cpu_to_le16(link);
 711         led->led_temporary = cpu_to_le16(act);
 712         led->duration = cpu_to_le16(1000);
 713
 714         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
 715
 716         return 0;
 717 }
 718
 719 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, burst)      \
 720 do {                                                            \
 721         queue.aifs = cpu_to_le16(ai_fs);                        \
 722         queue.cwmin = cpu_to_le16(cw_min);                      \
 723         queue.cwmax = cpu_to_le16(cw_max);                      \
 724         queue.txop = (burst == 0) ?                             \
 725                 0 : cpu_to_le16((burst * 100) / 32 + 1);        \
 726 } while(0)
 727
 728 static void p54_init_vdcf(struct ieee80211_hw *dev)
 729 {
 730         struct p54_common *priv = dev->priv;
 731         struct p54_control_hdr *hdr;
 732         struct p54_tx_control_vdcf *vdcf;
 733
 734         /* all USB V1 adapters need a extra headroom */
 735         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 736         hdr->magic1 = cpu_to_le16(0x8001);
 737         hdr->len = cpu_to_le16(sizeof(*vdcf));
 738         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
 739         hdr->req_id = cpu_to_le32(priv->rx_start);
 740
 741         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 742
 743         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 0x000f);
 744         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 0x001e);
 745         P54_SET_QUEUE(vdcf->queue[2], 0x0002, 0x000f, 0x03ff, 0x0014);
 746         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0x0000);
 747 }
 748
 749 static void p54_set_vdcf(struct ieee80211_hw *dev)
 750 {
 751         struct p54_common *priv = dev->priv;
 752         struct p54_control_hdr *hdr;
 753         struct p54_tx_control_vdcf *vdcf;
 754
 755         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 756
 757         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf), NULL);
 758
 759         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 760
 761         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
 762                 vdcf->slottime = 9;
 763                 vdcf->magic1 = 0x00;
 764                 vdcf->magic2 = 0x10;
 765         } else {
 766                 vdcf->slottime = 20;
 767                 vdcf->magic1 = 0x0a;
 768                 vdcf->magic2 = 0x06;
 769         }
 770
 771         /* (see prism54/isl_oid.h for further details) */
 772         vdcf->frameburst = cpu_to_le16(0);
 773
 774         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
 775 }
 776
 777 static int p54_add_interface(struct ieee80211_hw *dev,
 778                              struct ieee80211_if_init_conf *conf)
 779 {
 780         struct p54_common *priv = dev->priv;
 781         int err;
 782
 783         /* NOTE: using IEEE80211_IF_TYPE_MGMT to indicate no mode selected */
 784         if (priv->mode != IEEE80211_IF_TYPE_MGMT)
 785                 return -1;
 786
 787         switch (conf->type) {
 788         case IEEE80211_IF_TYPE_STA:
 789                 priv->mode = conf->type;
 790                 break;
 791         default:
 792                 return -EOPNOTSUPP;
 793         }
 794
 795         priv->mac_addr = conf->mac_addr;
 796
 797         err = priv->open(dev);
 798         if (err) {
 799                 priv->mode = IEEE80211_IF_TYPE_MGMT;
 800                 skb_queue_purge(&priv->tx_queue);
 801                 return err;
 802         }
 803
 804         p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
 805         p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
 806         p54_set_vdcf(dev);
 807
 808         switch (conf->type) {
 809         case IEEE80211_IF_TYPE_STA:
 810                 p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
 811                 break;
 812         }
 813
 814         p54_set_leds(dev, 1, 0, 0);
 815
 816         return 0;
 817 }
 818
 819 static void p54_remove_interface(struct ieee80211_hw *dev,
 820                                  struct ieee80211_if_init_conf *conf)
 821 {
 822         struct p54_common *priv = dev->priv;
 823         struct sk_buff *skb;
 824         while ((skb = skb_dequeue(&priv->tx_queue))) {
 825                 struct memrecord *range = (struct memrecord *)&skb->cb;
 826                 if (range->control)
 827                         kfree(range->control);
 828                 kfree_skb(skb);
 829         }
 830         priv->mode = IEEE80211_IF_TYPE_MGMT;
 831         priv->stop(dev);
 832 }
 833
 834 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
 835 {
 836         int ret;
 837
 838         ret = p54_set_freq(dev, cpu_to_le16(conf->freq));
 839         p54_set_vdcf(dev);
 840         return ret;
 841 }
 842
 843 static int p54_config_interface(struct ieee80211_hw *dev, int if_id,
 844                                 struct ieee80211_if_conf *conf)
 845 {
 846         struct p54_common *priv = dev->priv;
 847
 848         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
 849         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
 850         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
 851         return 0;
 852 }
 853
 854 static int p54_conf_tx(struct ieee80211_hw *dev, int queue,
 855                        const struct ieee80211_tx_queue_params *params)
 856 {
 857         struct p54_common *priv = dev->priv;
 858         struct p54_tx_control_vdcf *vdcf;
 859
 860         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
 861                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
 862
 863         if ((params) && !((queue < 0) || (queue > 4))) {
 864                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
 865                         params->cw_min, params->cw_max, params->burst_time);
 866         } else
 867                 return -EINVAL;
 868
 869         p54_set_vdcf(dev);
 870
 871         return 0;
 872 }
 873
 874 static int p54_get_stats(struct ieee80211_hw *dev,
 875                          struct ieee80211_low_level_stats *stats)
 876 {
 877         /* TODO */
 878         return 0;
 879 }
 880
 881 static int p54_get_tx_stats(struct ieee80211_hw *dev,
 882                             struct ieee80211_tx_queue_stats *stats)
 883 {
 884         struct p54_common *priv = dev->priv;
 885         unsigned int i;
 886
 887         for (i = 0; i < dev->queues; i++)
 888                 memcpy(&stats->data[i], &priv->tx_stats.data[i],
 889                         sizeof(stats->data[i]));
 890
 891         return 0;
 892 }
 893
 894 static const struct ieee80211_ops p54_ops = {
 895         .tx                     = p54_tx,
 896         .add_interface          = p54_add_interface,
 897         .remove_interface       = p54_remove_interface,
 898         .config                 = p54_config,
 899         .config_interface       = p54_config_interface,
 900         .conf_tx                = p54_conf_tx,
 901         .get_stats              = p54_get_stats,
 902         .get_tx_stats           = p54_get_tx_stats
 903 };
 904
 905 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 906 {
 907         struct ieee80211_hw *dev;
 908         struct p54_common *priv;
 909         int i;
 910
 911         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
 912         if (!dev)
 913                 return NULL;
 914
 915         priv = dev->priv;
 916         priv->mode = IEEE80211_IF_TYPE_MGMT;
 917         skb_queue_head_init(&priv->tx_queue);
 918         memcpy(priv->channels, p54_channels, sizeof(p54_channels));
 919         memcpy(priv->rates, p54_rates, sizeof(p54_rates));
 920         priv->modes[1].mode = MODE_IEEE80211B;
 921         priv->modes[1].num_rates = 4;
 922         priv->modes[1].rates = priv->rates;
 923         priv->modes[1].num_channels = ARRAY_SIZE(p54_channels);
 924         priv->modes[1].channels = priv->channels;
 925         priv->modes[0].mode = MODE_IEEE80211G;
 926         priv->modes[0].num_rates = ARRAY_SIZE(p54_rates);
 927         priv->modes[0].rates = priv->rates;
 928         priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
 929         priv->modes[0].channels = priv->channels;
 930         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
 931                     IEEE80211_HW_RX_INCLUDES_FCS;
 932         dev->channel_change_time = 1000;        /* TODO: find actual value */
 933         dev->max_rssi = 127;
 934
 935         priv->tx_stats.data[0].limit = 5;
 936         dev->queues = 1;
 937
 938         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
 939                                  sizeof(struct p54_tx_control_allocdata);
 940
 941         priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf) +
 942               priv->tx_hdr_len + sizeof(struct p54_control_hdr), GFP_KERNEL);
 943
 944         if (!priv->cached_vdcf) {
 945                 ieee80211_free_hw(dev);
 946                 return NULL;
 947         }
 948
 949         p54_init_vdcf(dev);
 950
 951         for (i = 0; i < 2; i++) {
 952                 if (ieee80211_register_hwmode(dev, &priv->modes[i])) {
 953                         kfree(priv->cached_vdcf);
 954                         ieee80211_free_hw(dev);
 955                         return NULL;
 956                 }
 957         }
 958
 959         return dev;
 960 }
 961 EXPORT_SYMBOL_GPL(p54_init_common);
 962
 963 void p54_free_common(struct ieee80211_hw *dev)
 964 {
 965         struct p54_common *priv = dev->priv;
 966         kfree(priv->iq_autocal);
 967         kfree(priv->output_limit);
 968         kfree(priv->curve_data);
 969         kfree(priv->cached_vdcf);
 970 }
 971 EXPORT_SYMBOL_GPL(p54_free_common);
 972
 973 static int __init p54_init(void)
 974 {
 975         return 0;
 976 }
 977
 978 static void __exit p54_exit(void)
 979 {
 980 }
 981
 982 module_init(p54_init);
 983 module_exit(p54_exit);